JP2021025173A - Composite nonwoven fabric manufacturing device and method of manufacturing composite nonwoven fabric - Google Patents

Abstract

To provide a composite nonwoven fabric manufacturing device that enables composite nonwoven fabrics to have both flexibility and strength when dry and when wet.SOLUTION: A spunbond nonwoven fabric 110 made of resin fibers is overlaid with a wet paper web 120 made of pulp fibers, and they are spun laced to unite the resin fibers and pulp fibers by water flow intertwining, and then dried.SELECTED DRAWING: Figure 2

Description

The present invention provides, for example, a cleaning sheet (cleaning sheet), a wet tissue, a hand towel (wet towel), a body wipe, a non-woven fabric, a face mask, etc., which are used for protecting the floor, polishing the floor, cleaning the floor and electrical appliances, and the like. Manufacturing method of composite non-woven fabric used for protective clothing fabrics, waterproof sheets, pillowcases, nursing sheets, paper diapers, pet sheets, hand towels, kitchen paper (kitchen towels), chemical wipes, automobile interiors, civil engineering and building materials, etc. The present invention relates to a composite nonwoven fabric manufacturing apparatus, and more particularly to a composite nonwoven fabric manufacturing method and a composite nonwoven fabric manufacturing apparatus in which pulp fibers and resin fibers are water-flow entangled by a spunlacing method.

Conventionally, as fibers constituting a non-woven fabric, for example, synthetic resin fibers such as polyester (PEs) and polypropylene (PP), and vegetable fibers such as rayon and pulp are known. Here, polyester-based and polypropylene-based synthetic resin fibers have strength but generally have poor water absorption because they are hydrophobic. On the other hand, plant fibers such as rayon and pulp generally have good water absorption because they are hydrophilic, but they have poor strength. In particular, when wet, the bonding force between the fibers becomes brittle, resulting in insufficient strength.

Therefore, for example, Patent Documents 1 to 4 disclose a technique of a composite non-woven fabric in which a paper sheet (paper sheet) and a non-woven fabric made of synthetic resin fibers are water-flow entangled. Such a composite non-woven fabric can be expected to be used in various applications because it has both the strength of synthetic resin fibers and the water absorption of pulp of a paper sheet.

For example, as cleaning products, cleaning sheets (functional sheets, wipers) used for removing foreign substances on the floor, protecting the floor, polishing the floor, waxing the floor, etc., kitchen paper (kitchen towels), sanitary products, etc. Wet tissues, hand towels, body wipes, makeup removers, face masks, clothing and bedding, protective clothing fabrics, waterproof sheets, pillowcases, nursing care sheets, paper diapers, pet sheets, etc. Be done.

In particular, in recent years, cleaning products, sanitary products, clothing products, bedding products, etc. made of non-woven fabrics have become widespread, and there is an increasing need for improving the performance of these non-woven fabrics. For example, in the above-mentioned use of the non-woven fabric, since it may be used for a soft material such as a human body, it is required to improve the texture and softness in consideration of the touch, touch and the like. In addition, for cleaning that removes foreign matter such as dust, hair, solid dust, stains, and adhering liquid on the floor, and for floor maintenance such as floor protection and polishing, objects to be cleaned and cleaned. It is required to have the flexibility to follow the uneven shape, adhere to it, wipe it off with a light force, and obtain the effect of maintenance. Further, even in applications such as kitchen paper, it is desired to improve flexibility that is hard to tear when wrapping things.

Japanese Unexamined Patent Publication No. 5-28583 Japanese Unexamined Patent Publication No. 5-253160 Japanese Unexamined Patent Publication No. 2002-275752 JP-A-2018-20124

However, in the conventional techniques described in Patent Documents 1 to 4, a paper sheet in a dry state is laminated on a spunbonded non-woven fabric, and the paper sheets are subjected to water flow entanglement treatment. Therefore, a water column flow with a weak water pressure is applied. There was a problem that the texture became poor just by injecting. It can be inferred that this is because in the dry paper sheet, the cellulose molecules of the pulp are bonded by hydrogen bonds, and it takes a lot of energy to break the bonds. That is, simply by injecting a water column flow with a weak water pressure, the movement of the pulp fibers is small, so that fiber unevenness is likely to occur. When the unevenness of the pulp fibers was large, the mechanical strength was weakened, especially when wet. In addition, with the spread of non-woven fabrics and the expansion of applications in recent years, there is also a need to emphasize manufacturing costs by improving productivity and yield, but if the processing speed is increased, the texture will worsen and the quality will deteriorate. It was also difficult to improve productivity and yield because it would lead to a decline.
Therefore, a high water pressure water column flow is required to improve the texture, but in the high water pressure water column flow, the fibers are strongly entangled with each other, so that the obtained non-woven fabric has become hard. In addition, since the amount of paper dust scattered is large, there are places where the pulp fibers are not entangled with the resin fibers, and there is a limit to the improvement of the texture, and the yield is not good.
That is, in the conventional techniques described in Patent Documents 1 to 4, if a low basis weight that emphasizes texture, bulkiness, and flexibility is used, the texture becomes poor and the strength is lowered, while the texture is emphasized. If the basis weight is high, it lacks flexibility, and it is difficult to achieve both flexibility and strength of the composite non-woven fabric.

Therefore, an object of the present invention is to provide a composite nonwoven fabric manufacturing apparatus and a composite nonwoven fabric manufacturing method that enable both the flexibility of the composite nonwoven fabric and the strength during drying and wetting.

In the composite nonwoven fabric manufacturing apparatus of the invention of claim 1, a spunbonded nonwoven fabric made of long resin fibers is formed in a spunbonded nonwoven fabric manufacturing section, and pulp fibers are dispersed in water by a pulp dispersion liquid preparing section of a wet papermaking web forming section. The pulp dispersion liquid is prepared, and the pulp fibers in the pulp dispersion liquid are made up on a net at the paper making section to form a wet paper web made of the pulp fibers in a wet state, and then laminated. The spunbonded non-woven fabric is placed on the net conveyor at the unit, the wet paper web in the wet state is superposed on the spunbonded non-woven fabric, and the resin fiber of the spunbonded non-woven fabric is superposed at the spunlace processing unit. And the pulp fibers of the wet paper web superposed therewith are integrated by water flow entanglement, and the resin fibers and the pulp fibers entangled integrally with the drying portion are dried.

Here, the spunbonded non-woven fabric manufacturing unit forms a non-woven fabric by a spunbonding method in which continuous long resin fibers formed by melting and spinning a synthetic resin are accumulated. That is, the spunbonded non-woven fabric is composed of continuous long fibers made of a synthetic resin such as a thermoplastic resin. This spunbonded non-woven fabric may be composed of one layer or may be formed by laminating two or more layers.
The resin fiber constituting the spunbonded non-woven fabric is, for example, a fiber made of a polyolefin such as polypropylene or polyethylene, or a synthetic resin such as nylon, vinylon, polyester or aramid.

The wet papermaking web forming section is composed of a pulp dispersion preparation section for preparing a pulp dispersion by dispersing pulp fibers in water and a papermaking section for drawing the pulp fibers in the pulp dispersion onto a net. It forms a wet wet paper web made of pulp fibers.
The pulp dispersion liquid is one in which pulp fibers are disintegrated and dispersed and suspended in water. For example, a sheet-shaped or plate-shaped cut plate pulp (pulp sheet) having a predetermined thickness is put into water. It may be produced by stirring, or it may be produced by mechanically and chemically treating fiber raw materials such as wood and used paper to pulp them, and then putting the pulp in water and stirring it. The dry-type paper sheet that has been prepared may be separated and produced.
As the above pulp, wood pulp made from wood is generally used, but plant fibers other than wood, such as grass, bamboo, cotton, flax, esparto, kenaf, milk weed, straw, bagasse, etc. It may be non-wood pulp.

In the laminated portion, the spunbonded non-woven fabric is placed on a net conveyor, and the wet paper web in a wet state is placed on the upper surface of the spunbonded non-woven fabric placed on the net conveyor and superposed. The top surface is a paper web.

The spunlace processing unit applies a water jet to the superposed wet paper web and the spunbonded non-woven fabric, and usually by applying a jet water flow from the upper surface of the wet paper web to the spunbonded non-woven fabric side. , The resin fiber of the spunbonded non-woven fabric and the pulp fiber of the wet paper web are integrated and bonded by water flow entanglement.

The drying portion dries the water entangled with the water flow of the resin fibers constituting the spunbonded non-woven fabric and the pulp fibers constituting the wet paper web, and is also dried by a heater or a heat roll. It may be hot air.

The spunbonded non-woven fabric manufacturing unit of the composite non-woven fabric manufacturing apparatus according to the second aspect of the present invention uses a spunbonded web forming unit for forming a spunbonded web made of the resin fiber and the resin fiber of the spunbonded web by thermal embossing roll. It has a heat-embossed portion that is heat-welded and heat-embossed, and the spunbonded non-woven fabric is embossed.
The heat embossed portion forms an embossed pattern by heat-welding and fusing the long fibers of the spunbond web by partially thermocompression bonding by embossing the heat embossing roll.

The spunbonded nonwoven fabric of the composite nonwoven fabric manufacturing apparatus according to claim 3 has a texture amount (basis weight) of preferably 5 g / m ² or more, 20 g / m ² or less, and more preferably 8 g / m ² or more. , 15 g / m ² or less, more preferably 10 g / m ² or more and 12 g / m ² or less.

The water content of the wet paper web when laminated on the spunbonded nonwoven fabric placed on the net conveyor at the laminated portion of the composite nonwoven fabric manufacturing apparatus according to claim 4 is preferably 60% or more, 80. % Or less, more preferably 65% or more and 80% or less.

The water pressure of the water column flow when the water flow is entangled in the span race processing unit of the composite nonwoven fabric manufacturing apparatus according to claim 5 is preferably 2 × 10 ⁶ Pa or more ^{, more preferably 2 × 10 7} Pa or less. The water pressure is as low as 2 × 10 ⁶ Pa or more and 1 × 10 ⁷ Pa or less, ^{more preferably 2 × 10 6} Pa or more and 5 × 10 ^{6 Pa or less.}

In the method for producing a composite non-woven fabric according to the invention of claim 6, a spun-bonded non-woven fabric made of resin fibers is formed in a spunbonded non-woven fabric manufacturing step, and pulp fibers are dispersed in water in a pulp dispersion liquid preparation step in a wet papermaking web forming step. A wet paper web made of the pulp fibers is formed by preparing a pulp dispersion and further drawing the pulp fibers in the pulp dispersion on a net in the paper making step, and a laminating step. The spunbonded non-woven fabric is placed on a net conveyor, and the wet paper web in a wet state is superposed on the spunbonded non-woven fabric, and the resin fibers of the spunbonded non-woven fabric and the resin fibers thereof are laminated in a spunlacing process. The pulp fibers of the combined wet paper web are integrated by water flow entanglement, and the resin fibers and the pulp fibers entangled together are dried in a drying step.

Here, the spunbonded nonwoven fabric manufacturing step is a step of forming a nonwoven fabric by a spunbonding method in which continuous long resin fibers formed by melting and spinning a synthetic resin are accumulated. That is, the spunbonded non-woven fabric is composed of continuous long fibers made of a synthetic resin such as a thermoplastic resin. The spunbonded non-woven fabric may be composed of one layer or may be formed by laminating two or more layers.
The resin fibers constituting the spunbonded non-woven fabric are, for example, polyolefin fibers such as polypropylene fibers and polyethylene fibers, and synthetic fibers such as nylon fibers, vinylon fibers, polyester fibers and aramid fibers.

The wet papermaking web forming step is described by a pulp dispersion preparation unit that prepares a pulp dispersion by dispersing pulp fibers in water and a papermaking unit that prepares the pulp fibers in the pulp dispersion on a net. This is a step of forming a wet paper web made of pulp fibers.
The pulp dispersion liquid is one in which pulp fibers are disintegrated and dispersed and suspended in water. For example, a sheet-shaped or plate-shaped cut plate pulp (pulp sheet) having a predetermined thickness is put into water. It may be produced by stirring, or it may be produced by mechanically and chemically treating fiber raw materials such as wood and used paper to pulp them, and then putting the pulp in water and stirring it. The dry-type paper sheet that has been prepared may be separated and produced.
As the above pulp, wood pulp made from wood is generally used, but plant fibers other than wood, such as grass, bamboo, cotton, flax, esparto, kenaf, milk weed, straw, bagasse, etc. It may be non-wood pulp.

The laminating step is a step of placing the spunbonded non-woven fabric on a net conveyor, and further placing the wet paper web in a wet state on the surface of the spunbonded non-woven fabric on the net conveyor and superimposing the spunbonded non-woven fabric. The top surface is a paper web.

The spunlace treatment step is performed by applying a water jet to the superposed wet paper web and the spunbonded non-woven fabric, and usually by applying a jet water flow from the upper surface of the wet paper web to the spunbonded non-woven fabric side. , The resin fiber of the spunbonded non-woven fabric and the pulp fiber of the wet paper web are integrated and bonded by water flow entanglement.

The drying step is a step of drying the water entangled with the water flow of the resin fibers constituting the spunbonded non-woven fabric and the pulp fibers constituting the wet paper web, and drying with a heater or a heat roll. It may be hot air.

The spunbonded non-woven fabric manufacturing step of the method for manufacturing a composite non-woven fabric according to the invention of claim 7 includes a spunbond web forming step of forming a spunbond web made of the resin fiber and a thermal embossing roll of the resin fiber of the spunbond web. The spunbonded non-woven fabric is embossed by having a heat embossing step of heat welding and heat embossing.
The thermal embossing step is a step of forming an embossed pattern by heat-welding and fusing the long fibers of the spunbond web by thermocompression bonding partially by embossing the thermal embossing roll.

The spunbonded nonwoven fabric according to the method for producing a composite nonwoven fabric according to claim 8 has a texture amount (basis weight) of preferably 5 g / m ² or more, 20 g / m ² or less, and more preferably 8 g / m ^2. As mentioned above, it is within the range of ^{15 g / m 2} or less, more preferably 10 g / m ² or more and 12 g / m ^{2 or less.}

In the laminating step of the method for producing a composite nonwoven fabric according to claim 9, the water content of the wet paper web when laminated on the spunbonded nonwoven fabric placed on the net conveyor is preferably 60% or more. It is 80% or less, more preferably 65% or more, and 80% or less.

In the span race treatment step of the method for manufacturing and packaging a composite nonwoven fabric according to claim 10, the water pressure of the water column flow at the time of confounding the water flow is preferably 2 × 10 ⁶ Pa or more and 2 × 10 ⁷ Pa or less. The water pressure is preferably 2 × 10 ⁶ Pa or more and 1 × 10 ⁷ Pa or less, and ^{more preferably 2 × 10 6} Pa or more and 5 × 10 ⁶ Pa or less.

According to the composite nonwoven fabric manufacturing apparatus according to the invention of claim 1, a spunbonded nonwoven fabric made of resin fibers is formed in the spunbonded nonwoven fabric manufacturing section, and the pulp dispersion liquid preparing section of the wet papermaking web forming section is used in water. After the pulp fibers are dispersed to prepare a pulp dispersion liquid, the pulp fibers in the pulp dispersion liquid are made on a net at the paper making section to form a wet paper web made of the pulp fibers in a wet state. Then, the spunbonded non-woven fabric is placed on the net conveyor at the laminated portion, and the wet paper web is further superposed on the spunbonded non-woven fabric. Then, in the spunlace processing section, the resin fibers of the spunbonded non-woven fabric and the pulp fibers of the wet paper web superposed on the resin fibers are integrated by water flow entanglement, and in the drying section, they are integrally formed in the spunlace processing section. A composite nonwoven fabric is obtained by drying the entangled resin fibers and the pulp fibers.

In this way, the wet paper web made of pulp fibers is superposed on the spunbonded non-woven fabric and spunlaced. Therefore, the pulp fibers are easily moved by the water column flow of the water jet during the spunlaced treatment, and the pulp fibers are opposed to the resin fibers. Can be penetrated and entangled evenly, and the texture can be improved.
Therefore, even if the composite non-woven fabric is formed with a low basis weight to improve the softness by water flow entanglement with low water pressure or by the low basis weight of the spunbonded non-woven fabric or wet paper web, the texture is good, so that it is dry and wet. The strength in is secured. Therefore, it is possible to achieve both flexibility and strength of the composite non-woven fabric.

According to the composite nonwoven fabric manufacturing apparatus according to the invention of claim 2, in the spunbonded nonwoven fabric manufacturing section, a spunbond web made of the resin fiber is formed at the spunbond web forming section, and the span is formed at the heat embossing section. The bond web is embossed with a thermal emboss roll to form the spunbonded non-woven fabric. Therefore, since the spunbonded non-woven fabric has high strength and morphological stability due to the heat fusion point (embossing) even if the desired low texture is obtained, the wet paper webs in a wet state are superposed and the moisture of the wet paper webs permeates. In addition, tearing, fiber shedding, and runoff are unlikely to occur even when the weight of the wet paper web is applied or when the water column flow is subjected to the spunlacing treatment. In addition, in the spunbonded non-woven fabric, the fibers are fixed in the heat-sealed portion, and the resin fibers in the non-heat-sealed portion are integrated in a state of freedom of movement, so that the spunlace treatment is performed. Therefore, pulp fibers are easily trapped between the resin fibers. Therefore, even when the spunbonded non-woven fabric has a low grain size, the pulp fiber can be evenly penetrated and entangled with the resin fiber while ensuring the strength. Therefore, in addition to the effect described in claim 1, the grain size is lower. Even if it is soft, it is possible to obtain a composite non-woven fabric having excellent texture and strength.

According to the composite nonwoven fabric manufacturing apparatus according to the third aspect of the present invention, the weight of the spunbonded nonwoven fabric is preferably in the range of 5 to ^{20 g / m 2.}
If the amount of the spunbonded non-woven fabric is too small, the pulp fibers often fall off or run off when the pulp fibers of the wet paper web are entangled with the pulp fibers in the spunlace treatment section. On the other hand, if the basis weight of the spunbonded non-woven fabric is too large, it is difficult for the pulp fibers of the wet paper web to penetrate, and a good texture cannot be obtained. Moreover, high flexibility cannot be obtained.
If the basis weight of the spunbonded non-woven fabric is preferably in ^{the range of 5 to 20} g / m 2, in addition to the effect according to claim 1 or 2, the pulp fiber capture property is high and the pulp content is high. The rate can be secured, the excellent texture can be secured even with a low basis weight, and the flexibility can be increased.

According to the composite nonwoven fabric manufacturing apparatus according to the invention of claim 4, the water content of the wet paper web to be laminated on the spunbonded nonwoven fabric placed on the net conveyor in the laminated portion is within the range of 60 to 80%. Therefore, it is assumed that the bond between the pulp fibers of the wet paper web is weak in the state before the spunlacing treatment with a sufficient amount of water, and the synthetic resin fibers and the pulp fibers are brought close to each other by the surface tension of water. Therefore, in addition to the effect according to any one of claims 1 to 3, the wet paper web is not superposed on both sides of the spunbonded non-woven fabric, but only the wet paper web is superposed on one side of the spunbonded non-woven fabric. Therefore, the pulp fibers can be evenly penetrated into the resin fibers of the spunbonded non-woven fabric by the spunlace treatment, and a composite non-woven fabric having an excellent texture can be formed even with a low grain size.

According to the composite nonwoven fabric manufacturing apparatus according to the fifth aspect of the present invention, the water pressure of the water column flow when the water flow is entangled in the spunlace processing unit is preferably in the range of ^{2 × 10 6} to 2 × 10 ^{7 Pa.} Therefore, in addition to the effect according to any one of claims 1 to 4, it is possible to prevent the scattering of pulp fibers and improve the yield and the formation. In addition, low basis weight can be achieved, and flexibility, bulkiness, or texture can be improved.

According to the method for producing a composite nonwoven fabric according to the invention of claim 6, a spunbonded nonwoven fabric made of resin fibers is formed in the spunbonded nonwoven fabric manufacturing process, and water is used in the pulp dispersion preparation section in the wet papermaking web forming step. A wet paper web made of the pulp fibers is produced by dispersing the pulp fibers in a non-woven fabric to prepare a pulp dispersion and then drawing the pulp fibers in the pulp dispersion on a net in a paper making step. In the forming and laminating step, the spunbonded non-woven fabric is placed on a net conveyor, and the wet paper web is further superposed on the spunbonded non-woven fabric. Then, in the spunlace treatment step, the resin fibers of the spunbonded non-woven fabric and the pulp fibers of the wet paper web superposed on the resin fibers are integrated by water flow entanglement, and are integrally formed by the spunlace treatment section in the drying step. The entangled resin fibers and pulp fibers are dried.

In this way, the wet paper web made of pulp fibers is superposed on the spunbonded non-woven fabric and spunlaced. Therefore, the pulp fibers are easily moved by the water column flow of the water jet during the spunlaced treatment, and the pulp fibers are opposed to the resin fibers. Can be penetrated and entangled evenly, and the texture can be improved.
Therefore, even if the composite non-woven fabric is formed with a low basis weight to improve the softness by water flow entanglement with low water pressure or by the low basis weight of the spunbonded non-woven fabric or wet paper web, the texture is good, so that it is dry and wet. The strength in is secured. Therefore, it is possible to achieve both flexibility and strength of the composite non-woven fabric.

According to the method for producing a composite nonwoven fabric according to the invention of claim 7, in the spunbonded nonwoven fabric manufacturing step, a spunbond web made of the resin fibers is formed in the spunbond web forming step, and the spunbond web is formed in the thermal embossing step. The spunbond web is heat-embossed with a heat embossing roll to form the spunbonded non-woven fabric. Therefore, since the spunbonded non-woven fabric has high strength and morphological stability due to the heat fusion point (embossing) even if the desired low texture is obtained, the wet paper webs in a wet state are superposed and the moisture of the wet paper webs permeates. In addition, tearing, fiber shedding, and runoff are unlikely to occur even when the weight of the wet paper web is applied or when the water column flow is subjected to the spunlacing treatment. In addition, in the spunbonded non-woven fabric, the fibers are fixed in the heat-sealed portion, and the resin fibers in the non-heat-sealed portion are integrated in a state of freedom of movement, so that the spunlace treatment is performed. Therefore, pulp fibers are easily trapped between the resin fibers. Therefore, even when the spunbonded non-woven fabric has a low basis weight, the pulp fibers can be evenly penetrated and entangled with the resin fibers while ensuring the strength. Therefore, in addition to the effect according to claim 6, a lower basis weight is used. Even if it is soft, it is possible to obtain a composite non-woven fabric having excellent texture and strength.

According to the method for producing a composite nonwoven fabric according to the invention of claim 8, the weight of the spunbonded nonwoven fabric is preferably in the range of 5 to ^{20 g / m 2.}
If the amount of the spunbonded non-woven fabric is too small, the pulp fibers often fall off or run off when the pulp fibers of the wet paper web are entangled with the pulp fibers in the spunlace treatment section. On the other hand, if the basis weight of the spunbonded non-woven fabric is too large, it is difficult for the pulp fibers of the wet paper web to penetrate, and a good texture cannot be obtained. Moreover, high flexibility cannot be obtained.
If the basis weight of the spunbonded non-woven fabric is preferably in ^{the range of 5 to 20} g / m 2, in addition to the effect according to claim 6 or 7, the pulp fiber capture property is high and the pulp content is high. The rate can be secured, the excellent texture can be secured even with a low basis weight, and the flexibility can be increased.

According to the composite nonwoven fabric manufacturing apparatus according to the invention of claim 9, the water content of the wet web to be laminated on the spunbonded nonwoven fabric placed on the net conveyor in the laminating step is within the range of 60 to 80%. Therefore, it is assumed that the bond between the pulp fibers of the wet paper web is weak in the state before the spunlacing treatment with a sufficient amount of water, and the synthetic resin fibers and the pulp fibers are brought close to each other by the surface tension of water. Therefore, in addition to the effect according to any one of claims 6 to 8, the wet paper web is not superposed on both sides of the spunbonded non-woven fabric, but only the wet paper web is superposed on one side of the spunbonded nonwoven fabric. Therefore, the pulp fibers can be evenly penetrated into the resin fibers of the spunbonded non-woven fabric by the spunlace treatment, and a composite non-woven fabric having an excellent texture can be formed even with a low grain size.

According to the method for producing a composite non-woven fabric according to the invention of claim 10, the water pressure of the water column flow when the water flow is entangled in the spunlace processing unit is preferably in the range of ^{2 × 10 6} to 2 × 10 ^{7 Pa.} Therefore, in addition to the effect according to any one of claims 6 to 9, it is possible to prevent the scattering of pulp fibers and improve the yield and the formation. In addition, low basis weight can be achieved, and flexibility, bulkiness, or texture can be improved.

FIG. 1 is a conceptual diagram showing the overall configuration of a spunbonded nonwoven fabric manufacturing unit in the composite nonwoven fabric manufacturing apparatus according to the embodiment of the present invention. FIG. 2 is a conceptual diagram showing the overall configuration of a wet papermaking web forming portion and a joining portion in the composite nonwoven fabric manufacturing apparatus according to the embodiment of the present invention. FIG. 3 is a development explanatory view showing an example of embossing used in the composite nonwoven fabric manufacturing apparatus according to the embodiment of the present invention. FIG. 4 is an enlarged expansion explanatory view of FIG. 3 showing an example of embossing used in the composite nonwoven fabric manufacturing apparatus according to the embodiment of the present invention. FIG. 5 is a development explanatory view showing another example of embossing used in the composite nonwoven fabric manufacturing apparatus according to the embodiment of the present invention. FIG. 6 is a conceptual diagram showing another example of the spunbonded nonwoven fabric manufacturing unit in the composite nonwoven fabric manufacturing apparatus according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiment, the same symbols and the same symbols shown in the drawings are the same or corresponding functional parts, and thus the duplicate description thereof will be omitted here.

First, the production of the composite nonwoven fabric 1 of the present embodiment will be described.
As shown in FIGS. 1 and 2, the composite nonwoven fabric manufacturing apparatus of the present embodiment is mainly arranged on the upstream side of the spunbonded nonwoven fabric manufacturing section 10 and the wet papermaking web forming section 20 and on the downstream side thereof. It has a bonding processing unit 30 to be used.

First, the spunbonded nonwoven fabric manufacturing unit 10 constituting the composite nonwoven fabric manufacturing apparatus of the present embodiment will be described with reference to FIG.
As shown in FIG. 1, the spunbonded non-woven fabric manufacturing unit 10 of the present embodiment directly integrates with the spunbonded web forming unit 11 for forming the spunbonded web 110A of the resin fiber from the spinning for producing the fiber, and the span. It constitutes a heat embossing portion 12 that is partially welded to the bond web 110A by heat embossing.

The spunbond web forming portion 11 is extruded from a hopper 111 that supplies rice granular resin pellets having a diameter of about 3 to 5 mm, an extruder 112 that melts and extrudes the raw material pellets supplied to the hopper 111, and an extruder 112. It has a nozzle 113 for injecting the molten resin, and an ejector 114 for collecting the resin continuously injected from the nozzle 113 as spinning of continuous long fibers, cooling the resin, and injecting the resin into a net conveyor (collector) NC1. Further, in the net conveyor NC1 of the spunbonded non-woven fabric manufacturing unit 10, a suction unit (suction unit) 115 that sucks air inside by a decompression means is arranged below the ejector 114, and a net is provided by an air pump arranged outside. The continuous resin fibers spun by suction from the upper surface of the conveyor NC1 toward the lower surface are easily collected on the upper surface of the net conveyor NC1.
By the spunbond web forming portion 11, long fibers made of resin continuously ejected from the ejector 114 are stacked in a web shape on the upper surface of the net conveyor NC1, and spunbond web (also referred to as fleece) 110A which is an integrated fiber is formed. Will be done.
Then, the spunbond web 110A formed on the upper surface of the net conveyor NC1 is sent to the heat embossing section 12 by the net conveyor NC1.

The heat embossing portion 12 is composed of a heat embossing convex roller 121 having a shape and pattern convex 121a (see FIGS. 3 to 5) and a heat smoothing roller 122 having a specific curvature surface.
By the heat embossing portion 12, the spunbond web 110A passes between the heat embossing convex roller 121 and the heat smoothing roller 122, and the resin fiber of the spunbond web 110A is partially embossed by the heat roller. An embossed spunbonded non-woven fabric 110 is formed by heat-sealing to impart unevenness.

In this way, the spunbonded nonwoven fabric 110 of the present embodiment is obtained by melting and spinning the synthetic resin as a raw material at the spunbonded web forming portion 11 of the spunbonded nonwoven fabric manufacturing unit 10 shown in FIG. After directly accumulating to form the spunbond web 110A, the fibers are thermocompression-bonded and heat-sealed with the thermal embossing rollers 121 and 122 in the thermal embossing section 12. In particular, in the heat fusion of the resin fibers by such heat embossing rollers 121 and 122, since no adhesive is used, a soft texture can be obtained, and the pulp fibers described later can be easily entangled.

That is, in the present embodiment, a spunbond web forming step of forming a spunbond web 110A by depositing long fibers obtained by melting and spinning a raw material resin chip on a net conveyor NC1 and heating the spunbond web 110A. An embossed spunbonded nonwoven fabric 110 is obtained by carrying out a spunbonded nonwoven fabric manufacturing process including a heat embossing process of embossing with the embossed convex roller 121 and the heat smoothing roller 122. As described above, the spunbonded non-woven fabric manufacturing unit 10 of the present embodiment is an apparatus for directly manufacturing the non-woven fabric from spinning, and consistently processes from spinning to forming the non-woven fabric, and the production speed is increased.
In the present embodiment, the spunbonded nonwoven fabric 110 thus embossed is wound into a roll shape having an arbitrary length and supplied to the bonding processing unit 30 described later.

Since the spunbonded nonwoven fabric 110 of the present embodiment thus obtained uses long fibers, it has high strength and stability, and it is also possible to obtain a wide one. In particular, some fibers are heat-sealed by embossing, so that the strength and morphological stability are further improved. Therefore, even if the spunbonded non-woven fabric 110 has a desired low basis weight, when the wet paper web 120 of the pulp fiber in a wet state is superposed on the spunbonded non-woven fabric 110 described later and spunlaced. , The spunbonded non-woven fabric 110 is less likely to be torn or the resin fibers are less likely to fall off. Further, in the spunbonded nonwoven fabric 110 embossed in this way, since the resin fibers in the non-heat-fused portion are accumulated in a state of freedom of movement, the pulp is bonded to the resin fibers by the spunlacing treatment. The fibers can be penetrated evenly. From this, for example, a composite nonwoven fabric 1 having extremely excellent texture and a predetermined strength can be obtained even with a low basis weight of ^{20 g / m 2 or less.}

Here, as the material constituting the spunbonded nonwoven fabric 110, polyolefins such as polyethylene (PE) and polypropylene (PP), and synthetic resins such as nylon, vinylon, polyester, aramid, acrylic, and polystyrene are used, and the composite nonwoven fabric 1 is used. It is selected according to the purpose and purpose. Depending on the selection of raw materials and ingenuity in the manufacturing process, it may be a composite type of polypropylene and polyethylene, a biodegradable type based on polylactic acid (PLA), etc., and a core sheath structure composed of multiple resins, a parallel structure, and split fiber. It may be a structural fiber. The fiber shape is generally round, but may be oval, rhombic, triangular, T-shaped, well-shaped, or the like.
In particular, since polypropylene is an environmentally friendly material and a soft long fiber, it is desirable to use a copolymer polypropylene as a raw material as a base material. Further, preferably, by using a soft type resin, the composite non-woven fabric 1 becomes soft even when it gets wet.

The resin fiber of the spunbonded nonwoven fabric 110 obtained by spinning is, for example, a long fiber having a fineness of 0.7 dtex to 9 dtex. If the fineness is too large, the flexibility and texture of the obtained composite nonwoven fabric 1 will decrease. On the other hand, if the fineness is too small, the productivity will decrease and the manufacturing cost will increase. If the fiber strength is preferably in the range of 1.1 dtex to 4.95 dtex, more preferably in the range of 1.65 dtex to 2.75 dtex, it is possible to secure good flexibility and texture of the composite nonwoven fabric 1. However, the manufacturing cost does not matter. By controlling the average fiber diameter of the resin fibers, it is possible to adjust various characteristics of the composite nonwoven fabric 1.

Then, in the spunbonded nonwoven fabric 110 of the present embodiment, the basis weight (basis weight) ^{is preferably 5 to 20} g / m 2, more preferably 8 to 15 g / m ² , and further preferably 10 to 12 g / m ^2. ) To be softly finished.
According to experimental studies by the present inventors, when the basis weight of the spunbonded nonwoven fabric 110 is too large, for example, by merely injecting ^{2 × 10 6 Pa~5 × 10 6} Pa and a weak water pressure water column flow, described below The pulp fibers of the wet paper web 120 are difficult to move to the back surface side of the spunbonded non-woven fabric 110 (the surface opposite to the surface on which the wet paper web 120 is overlapped), and the texture of the pulp fibers is inferior. Then, since the pulp fibers are unevenly distributed on the surface layer of the composite non-woven fabric 1, peeling and tearing are likely to occur when wet. On the other hand, if a water column flow with high water pressure is used, the texture is improved, but the texture and feel are hardened. On the contrary, if the basis weight is too low, the pulp fibers easily pass through and run off from the spunbonded non-woven fabric 110 in the spunlace treatment, the strength is insufficient, and the yield is deteriorated.
The basis weight of the spunbonded non-woven fabric 110 is preferably 5 to 20 g / m ² , more preferably 10 to 15 g / m ² , and further preferably 11 to 12 g / m ² , while ensuring strength. A composite non-woven fabric 1 having an excellent texture can be obtained even if it is softened with a low basis weight. The amount of the spunbonded nonwoven fabric 110 is determined by the type of raw material resin, the nozzle hole diameter and spacing of the ejector 114, the suction force of the suction unit 115, the speed of the net conveyor NC1, the heat amount of thermal embossing, and the like.

Further, with reference to FIGS. 3 and 4, a specific example of the embossing process used in the spunbonded nonwoven fabric manufacturing unit 10 of the present embodiment will be described. The heat embossing convex roller 121 for embossing shown in FIG. 1 will be described. The width of the heat-sealed portion in the X-axis component direction orthogonal to the transfer direction Y (transport direction Y) of the spunbond web 110A on the net conveyor NC1 is Xa, and the width of the heat-sealed portion in the Y-axis component direction. By Ya, a convex portion 121a that is partially heated is formed. The X-axis component orthogonal to the transfer direction Y of the spunbond web 110A and the Y-axis component orthogonal to the X-axis component are determined by the rotation axes of various rollers.

Here, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-sealed in the Y-axis component direction are located on a straight line in the Y-axis component direction.
Moreover, both sides of the half position of the length Ya of the heat-sealed portion in the Y-axis component direction are the length Yb of the non-heat-fused portion, and the length Yb of the non-heat-fused portion is the Y-axis component direction. Both sides of the 1/2 position are set to the length Ya of the heat-sealed portion. Further, the X-axis component orthogonal to the transfer direction of the spunbond web 110A and the Y-axis component orthogonal to the X-axis component are the width Xa of the heat-sealed portion in the X-axis component direction and the width of the non-fused portion. When it is set to Xb, the range is set to Xa <Xb, and the width Xa of the heat-sealed portion is narrower than the width Xb of the portion not fused.

That is, the width Xb of the non-fused portion is continuously formed in the Y-axis component direction in the Y-axis component direction. The length Yb of the non-heat-fused portion in the Y-axis component direction is an area where the areas Xa and Yb with respect to the width Xa of the non-heat-fused portion in the X-axis component direction are not embossed. That is, the convex portion 121a of the thermal embossed convex portion roller 121 embossed by the areas Xa and Ya. Therefore, the width Xa of the heat-sealed portion in the X-axis component direction and the width Ya of the heat-sealed portion in the Y-axis component direction partially heat the heat-sealed portion to be heat-sealed and embossed. The ratio of Xb / Xa can be used as an index of bulky processing and mechanical strength. In particular, the width Xb of the portion where the ratio of Xb / Xa is not fused also serves as an index of sliding resistance when sliding. Further, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the portion not heat-sealed in the Y-axis component direction can be processed.

In FIGS. 3 and 4, both sides of the half position of the length Ya of the heat-sealed portion in the Y-axis component direction are the length Yb of the non-heat-sealed portion, and the length Yb of the non-heat-sealed portion. Both sides of the 1/2 position in the Y-axis component direction are at the 1/2 position of the length Ya of the heat-sealed portion. When the present invention is carried out, both sides of the half position of the length Ya of the heat-sealed portion in the Y-axis component direction are the length Yb of the non-heat-sealed portion, and the length Yb of the non-heat-sealed portion. Both sides of the 1/2 position in the Y-axis component direction of the above may be any of the length Ya of the heat-sealed portion.

That is, in the embossing shown in FIGS. 3 and 4, the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the non-heat-fused portion in the Y-axis component direction are the heat-sealed portions. The surface of the width Xa and the length Ya of the heat-sealed portion is set as the heat-sealed surface, and in the arrangement on a straight line in the adjacent Y-axis component direction, 1/2 of the length Ya of the heat-sealed portion in the Y-axis component direction. Both sides of the position are set to the length Yb of the non-heat-sealed portion, and both sides of the 1/2 position of the length Yb of the non-heat-sealed portion in the Y-axis component direction are set to the length Ya of the heat-sealed portion. The embossing process is performed by the heat embossing convex roller 121 and the heat smoothing roller 122.

Further, when the present invention is carried out, for example, as shown in FIG. 5, the heat-welded embossed fused portions interfere with each other in the X-axis component direction, such as an "H" shape, Y. The shape may be line-symmetrical in the axial component direction.
In the embossing shown in FIG. 5, both sides of the half position of the length Ya of the heat-sealed portion in the Y-axis component direction are the width of the fused portion by the width Xc of the heat-sealed portion parallel to the X-axis component direction. Is connected. The width Xc of the fused portion heat-sealed by the embossed convex portion 121a is the length Ya of the heat-sealed portion of the convex portion 121a in the Y-axis component direction, such that the unit figure is "H". The width of the fused portion is connected by the width Xc of the heat fused portion parallel to the X-axis component direction on both sides of the 1/2 position. As a result, compared to the embossing shown in FIGS. 3 and 4, the structure is more difficult to expand and contract in the X-axis component direction and the Y-axis component direction, respectively, and the amount of the spunbonded nonwoven fabric 110 changing in the planar direction is increased. It is small, and the bulk in the thickness direction in the direction perpendicular to the plane can be increased.

That is, when the unit figure shown in FIG. 5 is “H”, the amount of change in the entire plane direction is small, and the bulk in the thickness direction in the direction perpendicular to the plane can be increased. If the shape is line-symmetrical in the X-axis component direction and the Y-axis component direction that interfere with each other, such as the "H" shape shown in FIG. 5, the processability of heat fusion is good.
On the other hand, in the unit figure "I" shown in FIGS. 3 and 4, the amount of change in the planar direction is small, but the possibility that lateral elongation occurs only in the X-axis component direction is high. However, an external force was applied in the X-axis component direction by changing the dimensions of the heat fusion length Ya, the width Yb of the non-heat fusion part, the heat fusion length Xa, and the width Xb of the non-heat fusion part. The time growth can be set arbitrarily.

The bonded portion of the embossed pattern of the actual composite non-woven fabric 1 made of polypropylene (PP) fibers bonded by the heat embossed convex roller 121 forming the convex portion 121a to be embossed is almost transparent, but this has holes. This does not mean that the polypropylene fiber portion of the base material is melted by heat and is integrated only by appearing transparent, so that vertical and horizontal elongation can be suppressed. Further, since the wiped dirt and the like do not pass from the front surface to the back surface, the dirt does not adhere to the hand or the like holding the composite non-woven fabric 1.
When carrying out the present invention, the thermal embossing rollers 121 and 122 can be formed into convex portions 121a having a height of 1/2 for each roller. However, the rotation timing must be the same. Further, the heat embossed convex roller 121 and the heat smoothing roller 122 may be configured in reverse. The heat embossed convex roller 121 and the heat smoothing roller 122 may have the same diameter formed by a predetermined diameter.

In this way, in the spunbonded nonwoven fabric 110 of the present embodiment, heat forming a uniform peripheral surface composed of a heat embossed convex roller 121 having a convex portion 121a partially formed on the peripheral surface for embossing and a cylinder having a predetermined diameter. It has an embossed pattern that is heat-sealed and embossed by a smoothing roller 122. That is, the width Xa of the heat-sealed portion in the X-axis component direction and the heat-sealing in the Y-axis component direction are formed by the heat embossed convex roller 121 forming the embossed convex portion 121a and the heat smoothing roller 122 composed of the specific curved surface. The width Ya of the portion forms an embossed pattern of the convex portion 121a shown in FIGS. 3 to 5 which is partially heated.

As described above, in the spunbonded nonwoven fabric 110 of the present embodiment, the fibers of the continuous fibers made of the synthetic resin have a bonding point (heat fusion point) by self-fusion, that is, embossing, and the continuous fibers are connected to each other. Since they are combined, they have high strength and morphological stability. In addition, since the fibers are accumulated in a state of freedom of movement other than the heat-sealed portion, the pulp fibers described later can be easily entangled.
Therefore, as will be described later, the wet paper web 120 in a wet state is superposed on the spunbonded nonwoven fabric 110 of the present embodiment, and the moisture of the wet paper web 120 permeates the spunbonded nonwoven fabric 110. Further, even if the weight of the wet paper web 120 is received, the spunbonded non-woven fabric 110 has high strength and morphological stability due to the heat fusion point (embossing). Therefore, even if the spunbonded non-woven fabric 110 has a low texture, the resin thereof. It is difficult for fibers to break, fall off, or run off. Further, even if the spunlace processing unit 32 receives the water column flow of the water jet, the resin fibers of the spunbonded non-woven fabric 110 are unlikely to be torn, fall off, or run off. Further, in the spunbonded nonwoven fabric 110 of the present embodiment, the resin fibers are fixed at the heat-sealing point (embossing), while the resin fibers of the spunbonded nonwoven fabric 110 are not heat-sealed. Since they are accumulated in a free-moving state, pulp fibers are easily trapped between these resin fibers by the spunlacing treatment. Therefore, even when the spunbonded nonwoven fabric 110 has a low basis weight, it is possible to obtain a composite nonwoven fabric 1 having an extremely excellent texture by enabling even penetration and entanglement of pulp fibers while ensuring strength. Therefore, it is possible to obtain a composite non-woven fabric 1 having a low basis weight and softness, which ensures strength and has an excellent texture.

Preferably, as shown in FIGS. 3 to 5, the X-axis component orthogonal to the transfer direction Y of the spunbonded non-woven fabric 110 and the Y-axis component orthogonal to the X-axis component are in the X-axis component direction. When the width Xa of the heat-sealed portion and the width Xb of the non-fused portion are set in the range of Xa <Xb, the length Ya of the heat-sealed portion in the Y-axis component direction and the heat-sealing in the Y-axis component direction The length Yb of the non-heat-sealed portion is an arrangement on a straight line in the Y-axis component direction, and the length of the non-heat-sealed portion on both sides of the 1/2 position of the length Ya of the heat-sealed portion in the Y-axis component direction. The length of the portion that becomes Yb and is not heat-sealed is set to the length Ya of the heat-sealed portion on both sides of the 1/2 position of the Yb in the Y-axis component direction, and is heat-sealed with the width Xa of the heat-sealed portion. Embossing is performed by a heat embossing convex roller 121 and a heat smoothing roller 122 that heat-sealate the surface of the length Ya of the portion.

In such embossing, when tension is applied to the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-heat-sealed portion in the X-axis component direction, the width Xb of the non-heat-sealed portion and the heat-fused portion are applied. An external force is applied to the length Yb of the non-wearing part, and the tensile force is the weakest. However, the external force applied at another oblique angle or in the Y-axis component direction is the area Xa of the embossed convex portion 121a with the width Xa. It is dispersed by Ya and has a structure that can withstand external forces. A heat-sealed portion having a width of Xa and a length of Ya is repeatedly formed on the peripheral surface of the heat-embossed convex roller 121, but when an external force is applied in the direction of the X-axis component, the portion where the external force is not directly heat-sealed. Will be added to the width Xb of.
Therefore, both ends of the width Yb of the portion not heat-sealed in the Y-axis component direction are longer than the length Ya of the adjacent heat-sealed portion regardless of whether it is dry (non-wet) or wet. Since it is located in both short ends and no external force is applied to both ends of the length Ya of the heat-sealed portion, it is soft even when the composite non-woven fabric 1 is used, and it is possible to perform a bulky process with strong stiffness without vertical stretching or lateral shrinkage.

In particular, the spunbonded nonwoven fabric 110 does not easily expand and contract in the X-axis component direction and the Y-axis component direction, respectively, and the amount of change in the planar direction is small, and the bulk in the thickness direction perpendicular to the plane is increased. Therefore, in the spunlacing treatment described later, even when the water column flow of the water jet is received, the resin fibers are less likely to flow, move, and flow out, and the pulp fibers are trapped between the resin fibers in the non-heat-sealed portion. It is easy to get entangled and the texture is improved.
Further, since both ends of the width Yb of the portion not heat-sealed in the Y-axis component direction are within both ends of the length Ya of the adjacent heat-sealed portion, the resin fiber and the pulp fiber are unlikely to fall off even if they are soft. Then, the vertical (Y-axis component direction) elongation does not occur, and the lateral (X-axis component direction) shrinkage does not occur, resulting in a strong bulky process. Further, since it is difficult to stretch, it is not easily affected by the width when it is processed, for example, when it is wound into a roll or pulled out into a roll, so that high-speed production is possible.

By the way, when carrying out the present invention, as shown in FIG. 6, in the spunbonded nonwoven fabric manufacturing section 10, it is also possible to further provide the hydrophilic treatment section 13 downstream of the heat embossing section 12. In the hydrophilic treatment section 13, one or the entire surface of the spunbonded nonwoven fabric 110 is brought into contact with or immersed in the hydrophilic treatment solution 13A containing a hydrophilic treatment agent such as a surfactant by pressing with a roller 13B, and further, a drying section. The water content of the hydrophilization treatment liquid 13A is dried at 13C. The surface or the entire surface of the spunbonded nonwoven fabric 110 may be hydrophilized by such a hydrophilic treatment section 13 to form the hydrophilic spunbonded nonwoven fabric 110. In the drying unit 13C, generally, a non-contact drying method, for example, a dryer such as an air through dryer (hot air ventilation method), a heater (air drying treatment), an infrared radiation method, a steam can, or a vacuum dehydration method , Super-sound energy method, ultra-short wave energy method.
According to the spunbonded non-woven fabric 110 thus hydrophilically processed, when the wet paper web 120 is superposed on the laminated portion 31 described later, the wet paper web 120 is well-adapted to the wet paper web 120. The pulp fibers of the wet paper web 120 can easily penetrate into the spunbonded non-woven fabric 110. Therefore, it is possible to improve the texture of the pulp fiber.

When only the surface of the spunbonded nonwoven fabric 110 is hydrophilically treated, the wet paper web 120 is supplied to the laminated portion 31 described later with the hydrophilically treated surface side of the spunbonded nonwoven fabric 110 facing upward. It is preferable to do so.
Further, when the present invention is carried out, the spunbonded nonwoven fabric manufacturing unit 10 may be configured to be able to select hydrophilic treatment or non-treatment depending on the use of the composite nonwoven fabric 1. That is, even if the hydrophilic treatment unit 13 is provided in the spunbonded nonwoven fabric manufacturing unit 10, the roller 13B can move up and down, and when the roller 13B is lowered, the spunbonded nonwoven fabric 110 comes into contact with the hydrophilic treatment liquid 13A. Then, in the state where the roller 13B is raised, the spunbonded nonwoven fabric 11 may pass through without coming into contact with the hydrophilic treatment liquid 13A. Then, when the roller 13B is passed through the roller 13B without coming into contact with the hydrophilic treatment liquid 13A, the drying portion 13C is put into a non-operating state and passed through the roller 13B, and then wound into a roll. In this way, the hydrophilic treatment unit 13 may be allowed to pass through the hydrophilic treatment unit 13 without functioning substantially, and the hydrophilic treatment unit 13 may not be subjected to the hydrophilic treatment.

Next, the wet papermaking web forming unit 20 constituting the composite nonwoven fabric manufacturing apparatus of the present embodiment will be described with reference to FIG.
As shown in FIG. 2, the wet papermaking web forming unit 20 of the present embodiment includes a pulp dispersion liquid preparation unit 21 for preparing a pulp dispersion liquid (pulp suspension) 212 by dispersing pulp fibers in water W. It constitutes a papermaking section 22 in which the prepared pulp dispersion 212 is made with a wire (net) made of a short net or a long net.

The pulp dispersion preparation unit 21 uses a plurality of tanks (T ₁ , T ₂ , T ₃ , ... T _n ) to sequentially prepare a pulp dispersion 212 having a low concentration to a high concentration. In particular, in the present embodiment, the pulp (plate-shaped paper, dried pulp sheet) P is put into water W and stirred to defibrate and dissociate the pulp, and finally the pulp fiber is preferable. , A pulp dispersion 212 having a concentration of about 0.8 to 1.2%, more preferably 0.9 to 1.1% is prepared. If the concentration of the pulp fiber is low, the water absorption and water retention of the obtained composite nonwoven fabric 1 are lowered, and it cannot be used for practical purposes. On the other hand, if the concentration of the pulp fiber is too high, the texture and flexibility are lowered, and the high hygroscopicity and water retention of the pulp make it difficult to obtain a predetermined strength when wet, so that it cannot be used for practical purposes. .. If the concentration of pulp fibers in the pulp dispersion 212 is preferably about 0.8 to 1.2%, more preferably 0.9 to 1.1%, the pressure is low in the subsequent span race treatment. Even when the water column flow is applied, the pulp fibers are evenly entangled with the resin fibers, and in the obtained composite non-woven fabric 1, it is possible to secure excellent texture and strength even with a low grain, and it is possible to secure predetermined water absorption, water retention and flexibility. It makes it possible to secure sex. If necessary, chemicals generally used for papermaking, such as a dissociation accelerator, a dispersant, a surfactant, and an antifoaming agent, can be appropriately added.

The pulp dispersion solution 212 prepared in this manner is put into a paper machine PP such as a pulper, further defibrated and dissociated by stirring, and if necessary, beaten with a refiner or the like (not shown) to store a storage tank in a chest. After that, it is ejected from the stock inlet portion S of the head box portion H to the wire part portion 22A having a wire made of a short net or a long net of the papermaking portion 22.
In the wire part portion 22A of the papermaking portion 22, the pulp dispersion liquid 212 ejected from the stock inlet portion S runs on the wire and water is dropped downward. In particular, in the wire part portion 22A having a short net or long net wire, moisture can be easily removed by applying vibration to the wire, and the texture can be adjusted and made uniform. A drainage portion (not shown) is provided under the wire part portion 22A to collect the dropped water.
By papermaking at the wire part portion 22A, a wet paper web 120 made of an aggregate of pulp fibers is formed. Then, the wet paper web 120 is sent to the bonding processing unit 30 through the roll unit 22B.

Here, according to the experimental research of the present inventors, the wet paper web 120 dehydrated through the wire part portion 22A and the roll portion 22B constituting the papermaking portion 22 preferably has a water content in the range of 60 to 80%. Within, the pulp fiber concentration is in the range of 20% to 40%.
If the water content of the wet paper web 120 to be laminated on the spunbonded non-woven fabric 110 in the later laminated portion 31 is too low, unevenness of the pulp fibers is likely to occur, and an excellent texture cannot be obtained when the basis weight is low. On the other hand, if the water content of the wet paper web 120 is too high, the spunbonded non-woven fabric 110 may be torn or the resin fibers may be torn when the wet paper web 120 is laminated on the spunbonded non-woven fabric 110 at the laminated portion 31 due to excessive moisture and weight of the wet paper web 120. Dropping and runoff are likely to occur, and the specified strength and excellent texture cannot be obtained.
If the water content of the wet paper web 120 when superposed on the spunbonded non-woven fabric 110 is preferably in the range of 60 to 80% and the pulp fiber concentration is in the range of 20% to 40%, a sufficient amount of water is used. In the state before the spunlacing treatment, the bond between the pulp fibers of the wet paper web 120 is weak, and the resin fibers and the pulp fibers are brought close to each other by the surface tension of water. As a result, the pulp fibers can be uniformly penetrated and entangled with the resin fibers of the spunbonded nonwoven fabric 110 by the spunlace treatment, and the composite nonwoven fabric 1 having a low texture and excellent texture can be formed without impairing the strength. Is possible. In particular, even if the wet paper web 120 is not superposed on both sides of the spunbonded non-woven fabric 110, only the wet paper web 120 is superposed on one side of the spunbonded non-woven fabric 110, and the composite non-woven fabric 1 having a low basis weight and excellent texture can be obtained. Be done. More preferably, the moisture content of the wet paper web 120 is in the range of 65 to 80%, and the pulp fiber concentration of the wet paper web 120 is in the range of 20% to 35%.

In this way, in the wet paper web 120 of the present embodiment, the raw material plate-shaped pulp P is put into water W by the pulp dispersion liquid preparation unit 21 of the wet papermaking web forming unit 20 shown in FIG. 2 and stirred. It is formed by preparing a pulp dispersion solution 212 in which pulp is disintegrated, and then drawing up the pulp dispersion solution 212 with a wire in a papermaking section 22.
That is, in the present embodiment, the pulp dispersion preparation step of adding the plate-shaped pulp P to the water W and stirring the pulp fibers to disperse the pulp fibers in the water W to prepare the pulp dispersion 212, and the pulp dispersion 212. Wet paper web 120 on which pulp fibers are accumulated can be obtained by carrying out a wet papermaking web forming step including a papermaking step of making a paper on a wire.

Here, the pulp used as the raw material of the wet paper web 120 is, for example, coniferous trees such as cedar, hinoki, karamatsu, douglas fur, southern pine, radiata pine, slush pine, spruce, lodge ball pine, and broadleaf trees such as eucalyptus and acacia. Chemical pulp obtained by evaporating wood by a craft method, a sulfite method, a soda method, a polysulfite method, or the like, mechanical pulp such as ground pulp or thermomechanical pulp, or recycled pulp is used. Softwood pulp and softwood pulp may be mixed and used, and if the content of softwood-derived pulp is high, a composite non-woven fabric 1 having a soft texture and a good texture can be obtained, and softwood bleached kraft pulp (NBKP) and softwood unfinished. When the content of softwood-derived pulp such as bleached pulp (NUKP) is high, it is possible to form a composite non-woven fabric 1 having high strength and good yield with less fiber shedding. Either virgin pulp or recycled pulp can be used, but recycled pulp tends to have more short fibers and can form a composite non-woven fabric 1 that is soft and has a better texture.

As the plate-shaped pulp P, pulp such as softwood or hardwood or recycled pulp is processed into a sheet (made into a pulp sheet), cut into a predetermined size, and plate-shaped (sheet) having a predetermined thickness, for example, a thickness of 3 mm to 5 mm. The one formed in the shape) can be used. However, in the case of carrying out the present invention, if the pulp dispersion liquid 212 in which pulp fibers are dispersed and suspended can be obtained, the sheet-like pulp wound in a roll shape is appropriately cut, not limited to the plate-shaped pulp P. Then, it may be put into water W, a paper sheet obtained by making pulp into paper may be used, or the pulp may be put directly into water W.
Then, in the present embodiment, a plurality of tanks (T ₁ , T ₂ , T ₃ , ... T _n ) are used, and initially, a liquid tank (suspension) in which pulp fibers have a low concentration (suspension) is used. to prepare a _{T 1, T 2, T 3} , T 4 ···), the dispersion of the fibers were allowed to stabilize, the liquid tank of their low concentration dispersions _{(T 1, T 2, T} 3, T4 ·・ ・) And a new plate pulp P are mixed _{to prepare a liquid tank (T 11} , T ₁₂ , ...) With a high concentration of dispersion, and after stabilizing the dispersion of fibers again, the preparation is further performed. _{A liquid tank of a higher concentration dispersion liquid (T 21} , T ₂₂ , ...) was prepared by mixing a liquid tank of the dispersion liquid (T ₁₁ , T ₁₂ , ...) With a new plate pulp P. By repeating these steps, a pulp dispersion solution 212 having a predetermined concentration is obtained. As a result, it is possible to efficiently prepare the pulp dispersion liquid 212 having a stable predetermined concentration in a short time.

The pulp dispersion solution 212 having a predetermined concentration thus prepared is supplied from the stock inlet portion S to the wire part portion 22A for papermaking, but the length of the dissociated pulp fibers supplied to the wire part portion 22A is The average fiber length is preferably in the range of 0.5 to 8 mm, more preferably in the range of 0.8 to 6 mm, and even more preferably in the range of 1 to 5 mm. That is, the preferable average fiber length of the pulp fibers forming the wet paper web 120 is in the range of 0.5 to 8 mm, more preferably in the range of 0.8 to 6 mm, and further preferably in the range of 1 to 5 mm. Is inside.
Within this range, the fiber drop during papermaking is small and the entanglement and yield are good, and the water jet during the spunlace treatment is less likely to generate paper dust, and the pulp fibers can be easily moved. The entanglement with the resin fiber is also good, and the pulp fiber is evenly entangled with the resin fiber.

Subsequently, the bonding processing unit 30 constituting the composite nonwoven fabric manufacturing apparatus of the present embodiment will be described with reference to FIG.
As shown in FIG. 2, the bonding processing unit 30 constituting the composite nonwoven fabric manufacturing apparatus of the present embodiment is arranged downstream of the wet papermaking web forming section 20 and is formed by the spunbonded nonwoven fabric manufacturing section 10 described above. The spunbonded non-woven fabric 110 wound in a roll shape is developed and placed on the net conveyor NC2, and the wet paper web 120 formed by the wet papermaking web forming portion 20 is further laminated on the spunbonded nonwoven fabric 110. The section 31 is composed of a spunlace-treated section 32 in which the spunbonded non-woven fabric 110 and the wet paper web 120 overlapped with each other are water-flow entangled, and a drying section 33 for drying the spunlaced integrated entangled fibers.

In the laminated portion 31, the spunbonded nonwoven fabric 110 wound in a roll shape is unwound, passes through the pressing roller and the guide roller of the nip portion, and is placed on the net conveyor NC2 of the bonding processing portion 30. Then, the wet paper web 120 in a wet state (wet state) sent out by the rotating roller and the roll portion 22B of the wire part portion 22A of the papermaking portion 22 is placed on the net conveyor NC2. It is placed on the upper surface of 110. Therefore, the laminated spunbonded non-woven fabric 110 and the wet paper web 120 are in a wet state (wet state) wet with water, and in that state, the net conveyor NC2 is used to reach the span race processing section 32 on the downstream side. Is transported.
The supports of the net conveyors NC1 and NC2 are not particularly limited, but generally, a net-like support such as a plain weave 20 to 100 mesh wire composed of synthetic resin or metal warp and weft is used. It is a porous support such as a punching plate.

In the span race processing unit 32, a plurality of span race nozzles (N ₁ , N ₂ , ... N _n ) are arranged in multiple stages along the transport direction of the net conveyor NC2, and these span race nozzles are arranged. A water jet is applied from (N ₁ , N ₂ , ... N _n ) toward the net conveyor NC2. In the present embodiment, the jet of the water jet is directed from above the wet paper web 120 side toward the spunbond non-woven fabric 110 side so as to penetrate the spunbonded nonwoven fabric 110 and the wet paper web 120 laminated on the spunbonded nonwoven fabric 110. Inject a jet. The water column flow ejected from the span race nozzles (N ₁ , N ₂ , ... N _n ) is perpendicular to the traveling direction of the net conveyor NCC. The water jet nozzles (N ₁ , N ₂ , ... N _n ) have, for example, a nozzle diameter (φ) of 0.01 to 3 mm, preferably 0.5 to 1.5 mm, and more preferably 0.75. It has a plurality of nozzle holes (orifices) in the range of ~ 1.25 mm, and the plurality of orifices are provided at intervals of, for example, 0.3 to 10 mm, preferably 0.5 to 2 mm. _{The number of nozzles (N 1} , N ₂ , ... N _n ) along the transport direction at this time _{(1 , 2 , ... n} ), the capacity of the nozzles (N 1, N 2, ... N n), etc. Is appropriately set according to the application of the composite nonwoven fabric 1 and the desired characteristics.

Here, in the present embodiment, since the wet paper web 120 is laminated on the spunbonded non-woven fabric 110 and spunlaced on them, the water jet nozzles (N ₁ , N ₂ , ... N _n ) are used. ^{preferably, 2 × 10 6 ~2 × 10} 7 Pa pressure of water, more preferably, be subjected to a water jet at ^{3 × 10 6 Pa~5 × 10 6} Pa as low pressure water, wet Since the pulp fibers of the paper web 120 are easy to move, the pulp fibers of the wet paper web 120 can be evenly entangled with the resin fibers forming the spunbonded non-woven fabric 110 to improve the texture.
A pulp that is entangled with resin fibers by arranging a manifold in the pipeline of the spunlace processing unit 32 _{and adjusting the pressure of the nozzles (N 1} , N ₂ , ... N _{n) with the manifold.} It is possible to adjust the energy of the spunlace of the fiber, and it is also possible to adjust it by the hole diameter of the nozzle. Further, in the span race treatment using a plurality of span race nozzles (N ₁ , N ₂ , ... N _n ), a water column flow may be applied from the upstream side to the downstream side at the same water pressure, preferably. By gradually increasing the water pressure from the upstream side to the downstream side, the formation can be improved.

In this way, the spunlace processing unit 32 injects a jet jet of a water jet from above the wet paper web 120 side so as to penetrate the spunbonded nonwoven fabric 110 and the wet paper web 120 laminated on the spunbonded non-woven fabric 110. As a result, the pulp fibers of the wet paper web 120 move due to the water column flow of the water jet and are entangled with the resin fibers of the spunbonded non-woven fabric 110, and the resin fibers and the pulp fibers are integrally entangled. That is, the pulp fibers of the wet paper web 120 and the resin fibers of the spunbonded non-woven fabric 110 are entangled with each other while jetting the jet jet of the water jet from top to bottom.

A nozzle (not shown) for sucking and removing water is installed below the net conveyor NC2, and the pulp fibers of the wet paper web 120 placed on the spunbonded non-woven fabric 110 are made of the spunbonded non-woven fabric 110. It makes it easier to penetrate the resin fiber. Further, a drainage section (not shown) is provided under the net conveyor NC2 so that the water dropped by the water jet can be collected. In particular, in the present embodiment, since the wet paper web 120 is placed on the spunbonded non-woven fabric 110 and spunlaced, the pulp fibers are less scattered due to the water column flow of the water jet, and the pulp fibers are made of resin. It penetrates the fibers evenly, entangles them, and is difficult to fall off or flow out. Further, since the spunbonded nonwoven fabric 110 of the present embodiment is embossed, the resin fibers are fused to prevent the resin fibers from falling off or flowing out due to the water jet. For this reason, even when the water after use of the water jet is collected, filtered by a filter, and reused for the water jet, there is little fiber contamination in the collected water, which causes clogging of the filter and the load of filter maintenance. Can be reduced. Further, continuous workability can be improved. Moreover, even when the wastewater is drained without being collected, the environmental load is small because the amount of fibers mixed is small.

The entangled body of the resin fiber and the pulp fiber integrally entangled by the water jet treatment is conveyed to the drying portion 33 further downstream by the net conveyor NC2. That is, since the aggregate that has passed through the spunlace processing unit 32 by the net conveyor NC2 and is integrally entangled with the resin fiber and the pulp fiber is in a wet state (wet state) wet with water, the spunlace processing unit 32 Moisture is removed by drying with a drying portion 33 arranged on the downstream side (outlet side).

As a drying method in the drying unit 33, a dryer such as an air through dryer (hot air ventilation method), a heater (drying treatment in air), an infrared radiation method, a steam can, a vacuum dehydration method, a supersonic energy method, an ultrashort wave energy method, etc. Non-contact type (non-compression type) drying may be used, or contact type (compression type) drying such as a drying roller or a yankee dryer (hot plate crimping method) may be used. You can choose according to your needs. For example, in an air-through dryer, a large number of through holes are provided on the peripheral surface of a rotating roller of a tubular body, and hot air is blown out from the through holes to perform drying, so that a bulky finish is possible.

Then, when the drying in the drying portion 33 is completed, the composite nonwoven fabric 1 which is an aggregate in which the resin fibers and the pulp fibers are integrally entangled is obtained. The dried composite non-woven fabric 1 is conveyed to the end of the net conveyor NC2 and wound by the take-up rod portion to complete a series of steps.

In this way, in the bonding processing section 30 of the present embodiment, the wet paper web 120 is superposed on the spunbonded non-woven fabric 110 mounted on the net conveyor NC2 at the laminating section 31 shown in FIG. 2, and further spunlaced. By applying a water jet to them in the processing unit 32, the resin fibers of the spunbonded non-woven fabric 110 and the pulp fibers of the wet paper web 120 are water-entangled, and in the drying unit 33, the water-entangled water is removed. By removing it, a composite non-woven fabric 1 in which resin fibers and pulp fibers are three-dimensionally integrally entangled is formed.
That is, in the present embodiment, after the above-mentioned spunbonded non-woven fabric manufacturing step and wet pulp-making web forming step are carried out, a laminating step of superimposing the wet paper web 120 on the spunbonded non-woven fabric 110 placed on the net conveyor NC2. By carrying out a spunlace treatment step of integrating the resin fibers of the laminated spunbonded non-woven fabric 110 and the pulp fibers of the wet paper web 120 by water flow entanglement, and a drying step of drying the integrally entangled resin fibers and pulp fibers. The composite non-woven fabric 1 is obtained.

As described above, in the composite nonwoven fabric 1 of the present embodiment, the spunbond web forming step of forming the spunbond web 110A by depositing the long fibers obtained by melting and spinning the raw material resin chips on the net conveyor NC1. In addition, a spunbonded non-woven fabric manufacturing process for manufacturing a spunbonded non-woven fabric by a thermal embossing process in which the spunbond web 110A is partially heat-welded by thermal embossing with a thermal embossing convex roller 121 and a thermal smoothing roller 122, and water W Wet paper web in a wet state by a pulp dispersion preparation step of dispersing pulp fibers to prepare a pulp dispersion 212 and a paper making step of drawing the pulp dispersion 212 at a wire part 22A composed of a long mesh or a short mesh. A wet papermaking web process for forming 120 and a spunbonded non-woven fabric 110 placed on a net conveyor NC2 which is a net-like (for example, plastic or stainless steel) belt conveyor, and further, in a wet state on the spunbonded non-woven fabric 110. A laminating process in which the wet paper webs 120 are laminated, and a spunlacing process in which the resin fibers of the spunbonded non-woven fabric 110 and the pulp fibers of the wet wet paper web 120 overlapped therewith are integrated by a water flow entanglement process on the net conveyor NC2. It is manufactured by a step and a drying step of drying resin fibers and pulp fibers integrally entangled on the net conveyor NC2.

Further, the composite non-woven fabric 1 of the present embodiment includes a spunbond web forming portion 11 for forming a spunbond web 110A by depositing long fibers obtained by melting and spinning a raw material resin chip on a net conveyor NC1. A spunbonded non-woven fabric manufacturing unit 10 including a heat embossing part 12 for partially heat-bonding the spunbond web 110A by heat embossing with a heat embossing convex roller 121 and a heat smoothing roller 122, and a pulp fiber dispersed in water W. The wet paper web 120 is formed by the pulp dispersion preparation unit 21 for preparing the pulp dispersion 212 and the paper making portion 22 for drawing the pulp dispersion 212 with a wire part 22A made of a long net or a short net. A laminated portion 31 in which a spunbonded non-woven fabric 110 is placed on a wet paper-making web portion 20 and a net conveyor NC2 which is a net-like belt conveyor, and a wet-treated wet paper web 120 is further superposed on the spunbonded non-woven fabric 110. On the net conveyor NC2, the spunlace processing unit 32 that integrates the resin fibers of the spunbonded non-woven fabric 110 and the pulp fibers of the wet paper web 120 in a wet state superimposed on the resin fibers on the net conveyor NC2 by water flow entanglement treatment, and on the net conveyor NC2. It is manufactured by a manufacturing apparatus including a drying unit 33 for drying integrally entwined resin fibers and pulp fibers.

According to the method for producing the composite nonwoven fabric 1 or the apparatus for producing the composite nonwoven fabric 1 according to the present embodiment, the composite nonwoven fabric 1 having an excellent texture can be obtained.
This is because in the method for producing the composite nonwoven fabric 1 or the apparatus for producing the composite nonwoven fabric 1 of the present embodiment, the wet paper web 120 in a wet state is superposed on the spunbonded nonwoven fabric 110, and a water jet is applied thereto to resin. By entwining the fibers and pulp fibers with water, that is, the pulp fibers supplied to the spunbonded non-woven fabric 110 are in the form of wet paper web 120 in a wet state, the pulp is subjected to the spunlacing treatment. This is because the fibers move easily.

That is, in the present embodiment, first, since the pulp fibers supplied to the spunbonded nonwoven fabric 110 are in the form of the wet paper web 120 in a wet state, the pulp fibers are less uneven in such a wet paper web 120 and the pulp The texture is good with the fibers evenly distributed. Then, by superimposing the wet paper web 120 in such a wet state on the spunbonded non-woven fabric 110, the spunbonded nonwoven fabric 110 and the wet paper are placed before the spunlacing treatment in which the water jet is applied, that is, before the water flow entanglement. The web 120 easily adheres to each other, and the resin fibers of the spunbonded non-woven fabric 110 and the pulp fibers of the wet paper web 120 easily approach each other due to the surface tension of water, so that the two become familiar with each other. Further, since the pulp fibers of the wet paper web 120 are in a wet state, the pulp fibers are in a state of being easily defibrated (opened). That is, the pulp fibers are softened and are in a state where they can easily move and move. In addition, the pulp fibers of the wet paper web 120 are an accumulation of relatively random arrangements.
Since the water jet is applied in such a state, the pulp fibers easily penetrate and entangle with the resin fibers of the spunbonded nonwoven fabric 110. In particular, in the wet paper web 120 in a wet state, since the cellulose molecules of the pulp are hydrated, the fibers can be separated from each other with weak energy and entangled with the resin fibers of the spunbonded nonwoven fabric 110. That is, most of the energy of the water column flow is not consumed for defibrating the pulp fibers, and the energy of the water column flow can be efficiently used for the movement and movement of the pulp fibers and the entanglement of the pulp fibers and the resin fibers. , Pulp fibers can penetrate and entangle evenly between the fibers of the resin fibers. In addition, since the pulp fibers of the wet paper web 120 are in a wet state before the water flow entanglement, the pulp fibers are less likely to scatter due to the water column flow pressure of the water jet. Therefore, the texture of the pulp fiber is excellent and the yield is also good.

In this way, according to the method or apparatus for producing the composite fiber 1 of the present embodiment, the wet paper web 120 in a wet state is superposed on the spunbond fiber 110 and water-entangled with each other. Since the pulp fibers are hard to scatter due to the water column flow and are easily moved, the pulp fibers can be wound and fixed to the resin fibers of the spunbonded non-woven fabric 110 from the wet paper web 120 side without being unevenly distributed on the supply side, and the thickness. The pulp fibers are evenly dispersed in the direction. Further, since the unevenness and variation of the pulp fibers in the Y-axis component direction (MD direction) and the X-axis component direction (CD direction) of the spunbonded nonwoven fabric 110 can be reduced, the uniformity of the thickness is improved. Therefore, the composite non-woven fabric 1 having an excellent texture can be obtained.
Furthermore, since the pulp fibers are easily moved by the water column flow of the water jet, a good texture can be obtained even if the processing speed is increased. Therefore, it is possible to improve the productivity without lowering the texture.

In particular, since the pulp fibers supplied to the spunbonded non-woven fabric 110 are in the wet paper web 120 state, a large amount of energy is not required for defibrating the pulp fibers, and the pulp fibers can easily move, so that the water column flow has a low water pressure. Pulp fibers are evenly entangled with the resin fibers of the spunbonded non-woven fabric 110 even at a low water pressure energy amount of 2 × 10 ⁶ to 2 × 10 ⁷ Pa, more preferably 3 × 10 ^{6 to} 5 × 10 ^{6 P.} This makes it easy to form the texture of pulp fibers even with a low grain size. Further, if the water flow is entangled with a low water pressure, the fibers are less likely to be scattered, penetrated, or washed away, which is advantageous for improving the formation of the formation, improving the yield of the material, and suppressing the manufacturing cost. In addition, the composite non-woven fabric 1 can be softened.

Further, since the pulp fibers supplied to the spunbonded non-woven fabric 110 are in the state of the wet paper web 120, the pulp fibers are less likely to be scattered by the water column flow of the water jet, so that the concentration of the pulp fibers supplied to the spunbonded non-woven fabric 110 is at least. , Pulp fibers can be uniformly entangled with synthetic resin fibers over the entire thickness. Further, according to the spunbonded non-woven fabric 110 of the present embodiment, since it is embossed, the resin fibers are hard to flow out and fall off due to the water column flow of the water jet even if the texture is low, and the portion is not heat-sealed. It facilitates the capture of pulp fibers and facilitates the formation of the texture of pulp fibers.

Therefore, the composite non-woven fabric 1 having a good texture even with a low basis weight can be obtained, and the flexibility can be improved. Further, since the texture is good even if it is softened in this way, it is possible to obtain strength that is unlikely to cause tearing or falling off of fibers not only when it is dry (non-wet state) but also when it is wet (wet state). In addition, even if there is a difference in hardness between the synthetic fiber and the pulp fiber when wet, the texture is good, so there is little discomfort when wet.

As described above, according to the manufacturing method or the manufacturing apparatus of the composite nonwoven fabric 1 of the present embodiment, the composite nonwoven fabric 1 is provided by low water pressure water flow entanglement or by the low grain of the spunbonded nonwoven fabric 110 or the wet paper web 120. forming a low basis weight, preferably, 15~45g / m ^2, more preferably, 15 to 40 g / m ^2, more preferably, softness as 20 to 30 g / m ^2, bulky feeling, even to improve the texture, etc. Since the texture is good, strength is ensured even when dry and wet, and it is possible to achieve both flexibility and strength of the composite non-woven fabric 1. For example, the spunbonded non-woven fabric 110 can be 11 to 12 g / cm ² , and the pulp fiber can be 28 to 29 g / cm ² .

Further, according to the method or apparatus for producing the composite nonwoven fabric 1 of the present embodiment, the pulp dispersion liquid 212 prepared by dispersing pulp fibers in water W is made into paper to form a wet paper web 120 in a wet state. Since the wet paper web 120 is superposed on the spunbonded non-woven fabric 110 and spunlaced, the concentration and the amount of the pulp fibers laminated on the spunbonded non-woven fabric 110 can be easily adjusted by adjusting the pulp fiber concentration of the pulp dispersion 212. In addition, the composite non-woven fabric 1 has a desired texture as compared with a paper sheet which can be adjusted at low cost and is in a dry state (non-wet state) and is spun-laced by superimposing it on a spunbonded non-woven fabric. The amount can be set and easily controlled to the desired characteristics. That is, it is easy to arbitrarily set characteristics such as basis weight, mechanical strength, water retention, water absorption, and bulky processing according to the purpose and application of the composite nonwoven fabric 1. In addition, it can be manufactured at low cost.

In particular, in the conventional case where a paper sheet in a dry state (non-wet state) is superposed on a spunbonded non-woven fabric and subjected to a spunlace treatment, paper dust is easily scattered. When the pulp fibers are washed away during the spunlacing treatment in this way, the composite non-woven fabric 1 having desired characteristics such as moisture absorption and strength is entangled with the resin fibers of the spunbonded non-woven fabric 110 in designing the composite non-woven fabric 1 according to the application. When setting the amount of pulp fiber, it is necessary to select the amount of pulp fiber and the amount of grain of the paper sheet to be spunlaced in consideration of the amount of runoff of the pulp fiber, and further, it depends on the amount of grain and thickness of the paper sheet to be supplied. Since the amount of pulp fibers that can be entangled with the spunbonded nonwoven fabric 110 varies, it is not easy to select the optimum paper sheet, and it is not easy to design and control the characteristics of the composite nonwoven fabric 1.
However, according to the method or apparatus for producing the composite nonwoven fabric 1 of the present embodiment, the wet paper web 120 in a wet state formed by making a pulp dispersion liquid 212 prepared by dispersing pulp fibers in water W is spunbonded. Since they are laminated on the non-woven fabric 110 and spunlaced, the amount of pulp fibers and the amount of grain of the wet paper web 120 can be easily adjusted, and the pulp fibers are less likely to be washed away during the spunlaced treatment and are unevenly distributed. Since it is difficult to do so and the pulp fibers can be uniformly entangled with the resin fibers over the entire thickness, it is easy to set the blending ratio of the resin fibers and the pulp fibers, and the design and characteristics of the composite nonwoven fabric 1 can be easily controlled. That is, depending on the use of the composite non-woven fabric 1, the mixing ratio of the resin fiber of the spunbonded non-woven fabric 110 and the pulp fiber of the wet paper web 120 and the material can be easily switched.

As described above, according to the manufacturing method or manufacturing apparatus of the composite non-woven fabric 1 of the present embodiment, the wet paper web 120 in a wet state is superposed on the spunbonded non-woven fabric 110, and the wet paper web 120 is spunlaced. Since the pulp fibers move easily during the treatment, the texture is good regardless of whether the texture is low or high. Since the strength can be secured due to the good texture, the ratio of pulp fiber and resin fiber can be set in a wide range, and a wide range can be set from a low basis weight to a high basis weight, and a wide range of characteristics can be imparted. ..

Then, in this embodiment, the content of the pulp fiber in the composite non-woven fabric 1 is, for example, in the range of 20% by mass to 90% by mass, preferably 30 to 85% by mass, and more preferably 55 to 85% by mass. The content of the resin fiber is, for example, in the range of 10% by mass to 80% by mass, preferably in the range of 15 to 70% by mass, and more preferably in the range of 15 to 45% by mass. .. If the content of the pulp fiber is too small, the desired water retention and water absorption cannot be obtained, while if the content of the synthetic resin is too small, the desired strength cannot be obtained. In particular, in the present embodiment, since the pulp fibers can be dispersed evenly and entangled with the resin fibers in a textured manner, even if the content of the pulp fibers is increased, it is predetermined not only when the pulp fibers are dry (when not wet) but also when they are wet. It is possible to obtain both water absorption / retention and strength. Further, for example, even if the pulp fiber content is 75 to 85% by mass and the resin fiber content is 15 to 25% by mass and the pulp fiber content is increased, the texture is good, so that a predetermined strength can be secured even when wet. ..

In the case where the wet paper web 120 is superposed on the spunbonded non-woven fabric 110 and subjected to the spunlacing treatment, the pulp fibers are easily moved by the water column flow of the water jet, and the pulp fibers are less scattered by the water column flow of the water jet. Even when the number of pulp fibers supplied to the spunbonded non-woven fabric 110 is increased, the pulp fibers are not easily biased and can penetrate and entangle with the resin fibers evenly, and the characteristics commensurate with the increase in the amount of pulp fibers, that is, the improvement of water absorption and water retention. And because the pulp fibers are uniformly dispersed, strength that is hard to tear even when wet is obtained, and the strength and morphological stability at the time of use are excellent. In addition, the yield is good and it can be manufactured at low cost.
That is, according to the method for producing the composite nonwoven fabric 1 or the manufacturing apparatus for the composite nonwoven fabric 1 of the present embodiment, the formation of the texture of the pulp fibers is improved, so that the pulp fibers are not unevenly distributed even if the amount of the pulp fibers is increased. The decrease in strength due to excessive water absorption in the unevenly distributed portion of the fiber is prevented, and it is difficult to tear even when wet. In addition, deformation (waviness, curl, etc.) of the composite nonwoven fabric 1 due to excessive moisture absorption in the unevenly distributed portion of the pulp fiber is unlikely to occur. Therefore, it is possible to improve water absorption and water retention without impairing the strength.

In this way, according to the manufacturing apparatus for the composite nonwoven fabric 1 of the present embodiment, the spunbonded nonwoven fabric 110 is placed on the support net of the net conveyor NC2 at the laminated portion 31, and the pulp fibers in a wet state are further placed on the upper surface thereof. By laminating the wet paper web 120 and applying a water jet from the upper surface side of the wet paper web 120 toward the spunbonded non-woven fabric 110 side, the pulp fibers forming the wet paper web 120 and the spunbonded non-woven fabric 110 are configured. The resin fiber is entangled with the water flow.
Further, according to the method for producing the composite nonwoven fabric 1 of the present embodiment, the spunbonded nonwoven fabric 110 is placed on the support net of the net conveyor NC2, and the wet paper web 120 of the pulp fiber in a wet state is further placed on the upper surface thereof. The pulp fibers forming the wet paper web 120 and the resin fibers constituting the spunbonded non-woven fabric 110 are laminated and water jetted from the upper surface side of the wet paper web 120 toward the spunbonded non-woven fabric 110 side. Is spun-laced.

Thus, according to the method or apparatus for producing the composite nonwoven fabric 1 of the present embodiment, the composite nonwoven fabric 1 in which the pulp fibers are evenly entangled with the resin fibers can be obtained. The composite nonwoven fabric 1 of the present embodiment thus obtained has good water absorption and water retention due to the hydrophilicity of the pulp fibers, and has good oil absorption due to the resin fibers such as polypropylene, and further, water and oil. Even when it absorbs liquids such as, the decrease in strength and rigidity is suppressed, it has moderate strength and morphological stability that it is hard to tear, and it is easy to use. In particular, since the pulp fibers are entangled with the resin fibers in a well-formed manner and integrated, the strength does not decrease much not only in the non-wet state but also in the wet state in which a liquid such as water is absorbed. Even during use, the fibers are less likely to fall off and torn. Further, according to the method for producing the composite nonwoven fabric 1 or the manufacturing apparatus for the composite nonwoven fabric 1 of the present embodiment, the pulp fibers penetrate and entangle with the resin fibers evenly in this way to improve the formation of the texture of the pulp fibers. , It is possible to improve the water absorption rate (oil absorption rate), water absorption (oil absorption property), and water retention (retention property). If it is used to have filter performance, it is possible to improve the filtration speed.

In the present embodiment, since the pulp fibers supplied to the spunbonded non-woven fabric 110 are the wet paper web 120 in a wet state, the wet paper web 120 is easily adapted to the spunbonded nonwoven fabric 110, and the wet paper web 120 is used during the spunlace treatment. The formed pulp fibers are easy to move, and the pulp fibers penetrate into the resin fibers of the spunbonded non-woven fabric 110 evenly and are entangled, so that the texture of the pulp fibers is improved. Therefore, even if the composite nonwoven fabric 1 is formed with a low basis weight by water flow entanglement with low water pressure or by a low basis weight of the spunbonded nonwoven fabric 110 or the wet paper web 120, the texture is good, so that the composite nonwoven fabric 1 is not only in a non-wet state but also in a wet state. Even if it is, it is possible to secure a predetermined strength and it is hard to tear at the time of use. That is, even if it is flexible and has an excellent texture due to its low basis weight, it can satisfy the wet strength when liquids such as water, chemicals, and cosmetics are infiltrated, and it is hard to tear during use. The low-weight composite non-woven fabric 1 has a soft and soft feel when gripped, and is soft to the touch and feels good on the skin, especially when used for soft objects such as the human body, and is fluffy. It is possible to obtain a soft feel with low irritation. Furthermore, it is subject to cleaning and maintenance in applications used for floor maintenance such as cleaning to remove foreign substances such as dust, hair, solid dust, stains, and adhering liquid on the floor, floor protection, and floor polishing. It is possible to follow the uneven shape of an object, adhere to it, and wipe it off with a light force to obtain a high effect of maintenance. In addition, since the texture is well uniform, their stable performance can be obtained.

That is, in the composite non-woven fabric 1 of the present embodiment, the pulp fibers and the continuous resin fibers are evenly entangled and integrated, and the floor has a uniform opening pattern and is excellent in strength. Cleaning sheet used for material protection, floor material polishing, floor material cleaning, home appliances such as TVs, personal computers, and refrigerators, kitchen areas, optical equipment such as glasses and lenses, windows, and car cleaning. (Cleaning sheet, disposable rag, chemical rag such as wiper), wet tissue, disposable hand wipe (squeeze), body wipe, makeup remover, face mask, protective clothing fabric, waterproof sheets, pillowcase, nursing sheets, paper diapers, pets Sheets for squeezing, kitchen paper (kitchen towels), table covers, sheets for miscellaneous goods such as dinner mats, drip absorbers, packaging materials, automobile interiors, civil engineering and construction materials, various filters, industrial masks, wiping cloths, etc. It is suitable for the above applications.

In these applications, if necessary, wetting agents such as water and propylene glycol, antibacterial agents such as alcohols, paraoxybenzoic acid esters, benzalkonium chloride, antifungal agents, agents such as fragrances, and cosmetics However, in the composite non-woven fabric 1 of the present embodiment, the pulp fibers are entwined and integrated with the synthetic resin fibers in a textured manner, so that even if the liquids permeate, the strength is strong. There is little drop, and it is hard to tear during work or use. Furthermore, even in applications where water, chemicals, cosmetics, etc. are added and used in a wet state, the pulp fibers are not unevenly distributed on one side of the composite nonwoven fabric 1 and the texture is good, so that the overall water absorption and water retention are improved. In addition, the absorbed water is hard to evaporate and is hard to dry. In addition, even if it is used for wiping off moisture from disposable rags, wipers, etc., and for absorbing moisture from waterproof sheets, pillowcases, nursing sheets, disposable diapers, and pet sheets, the strength due to absorption of moisture and liquids There is little drop, and it is hard to tear during work or use. Since the pulp fibers are not unevenly distributed, it is bulky, soft and has a good texture.

In particular, the composite non-woven fabric 1 having an arbitrary bulky thickness, softness, and good texture by water flow entanglement with low water pressure or by the low basis weight of the spunbonded non-woven fabric 110 or the wet paper web 120 can be used for soft objects such as the human body. In applications such as being used, it is possible to obtain a soft feel that is soft to the touch. In addition, it is possible to follow the uneven shape of the object to be cleaned or maintained, and to adhere to it and wipe it off with a light force to obtain a high effect of maintenance. And even if it is soft and has a good texture, it has a good texture, so there is little decrease in strength due to absorption of moisture and liquid, and it is hard to tear during work or use.

Further, in the spunbonded nonwoven fabric 110 formed of resin fibers such as polypropylene, the orientation of the fibers in the vertical and horizontal directions is small, and the orientation of the pulp fibers is also small in the wet paper web 120 of the pulp fibers to be laminated on the spunbond nonwoven fabric 110. It's a small one. Therefore, in the obtained composite nonwoven fabric 1, the aspect ratio difference in dry tensile strength is extremely small without natural longitudinal elongation (Y-axis direction) or lateral shrinkage (X-axis direction).

Further, according to the method or apparatus for producing the composite nonwoven fabric 1 of the present embodiment, the pulp dispersion liquid 212 is prepared by putting plate pulp P having a predetermined thickness made of pulp fibers in water W and stirring the pulp. , The separation from the plate pulp P is smooth, the production efficiency is good, the flocs are hard to be formed at the time of papermaking, and the texture can be uniformly adjusted at the time of papermaking at low cost. In particular, a combination of pulp fiber and polypropylene fiber can be inexpensive.

The width of the pulp fibers forming the wet paper web 120 is, for example, 10 to 60 μm. The pulp fibers may be either beaten pulp or unbeaten pulp, but in the case of beaten pulp, the pulp fibers are easily entangled with the resin fibers, and the strength can be further improved. On the other hand, in the case of unbeaten pulp, the bond between the pulp fibers of the wet paper web 120 when the pulp dispersion 2121 is made with a long net or a short net can be loosened, so that the pulp fibers are released during the spunlace treatment. It is easy to move and can improve the texture.

Further, in the method or apparatus for producing the composite nonwoven fabric 1 of the present embodiment, the resin fibers of the spunbonded nonwoven fabric 110 and the pulp fibers of the wet paper web 120 are integrated by water flow entanglement in this way, so that they are adhered. Predetermined strength is obtained by entanglement of fibers without applying an agent, it is more absorbent than bonding with an adhesive, and it has a good soft and soft feel and texture even in a non-wet state or a wet state. The composite non-woven fabric 1 can be formed.

As described above, in the composite non-woven fabric manufacturing apparatus of the present embodiment, the spunbond web forming portion 11 for forming the spunbond web 110A made of long resin fibers and the resin fibers of the spunbond web 110A are heat-embossed roll 121. , The spunbonded non-woven fabric manufacturing section 10 that forms the spunbonded non-woven fabric 110 made of long resin fibers by the heat-embossing section 12 that is partially heat-welded by 122, and the pulp dispersion liquid 212 by dispersing the pulp fibers in water W. Wet paper making web that forms a wet paper web 120 made of pulp fibers by the paper making part 22 that draws the pulp dispersion preparation part 21 and the pulp dispersion 212 to be prepared on the short net or long net of the wire part part 22A. The laminated portion 31 in which the spunbonded non-woven fabric 110 is placed on the forming portion 20 and the net conveyor NC2, and the wet paper web 120 in a wet state is further superposed on the spunbonded non-woven fabric 110, and the resin fiber of the spunbonded non-woven fabric 110. It is provided with a spunlace processing unit 32 that integrates the pulp fibers of the wet paper web 120 superposed therewith by water flow entanglement, and a drying unit 33 that dries the integrally entangled resin fibers and the pulp fibers. ..

Further, in the method for producing a composite non-woven fabric of the present embodiment, the spunbond web forming portion 11 for forming the spunbond web 110A made of long resin fibers and the resin fibers of the spunbond web 110A are partially formed by thermal embossing rolls 121 and 122. A spunbonded non-woven fabric manufacturing process for forming a spunbonded non-woven fabric 110 made of long resin fibers by a heat-embossed portion 12 that is heat-welded to the paper, and preparation of a pulp dispersion liquid for preparing a pulp dispersion liquid 212 by dispersing the pulp fibers in water W. A wet paper web forming step of forming a wet paper web 120 made of pulp fibers by a step and a paper making step of drawing the pulp dispersion liquid 212 on a short net or a long net of the wire part 22A, and a net conveyor NC2. A laminating step of placing the spunbonded non-woven fabric 110 on the spunbonded non-woven fabric 110 and further laminating the wet paper web 120 on the spunbonded non-woven fabric 110, and the resin fibers of the spunbonded non-woven fabric 110 and the wet-paper web 120 superposed on the resin fibers. It includes a spunlace treatment step of integrating the pulp fibers with water flow entanglement and a drying step of drying the integrally entangled resin fibers and pulp fibers.

Therefore, according to the composite non-woven fabric manufacturing apparatus or the composite non-woven fabric manufacturing method of the present embodiment, the wet paper web 120 in a wet state is superposed on the spunbonded non-woven fabric 110 at the laminated portion 31, and they are laminated at the spunlace processing unit 32. Since the water flow is entangled, the pulp fibers and the resin fibers of the wet paper web 120 and the spunbonded non-woven fabric 110 come close to each other due to the surface tension of the water before the spunlacing treatment, and the pulp fibers are bonded to each other. Is in a weak state, the pulp fibers are easily moved by the water jet to be spunlaced to penetrate into the resin fibers of the spunbonded non-woven fabric 110, and are caught and entangled between the resin fibers. As a result, unevenness and uneven distribution of pulp fibers are suppressed, and the composite nonwoven fabric 1 having a good texture can be formed.

That is, since the pulp fibers entangled with the resin fibers of the spunbonded nonwoven fabric 110 are supplied to the spunbonded nonwoven fabric 110 in the form of a wet paper web 120 in a wet state, the pulp fibers are easily moved by the spunlaced water jet and are low. Even in a water column flow with water pressure, the pulp fibers can penetrate evenly into the resin fibers of the spunbonded non-woven fabric and be entangled. Therefore, even if the texture is low due to the water flow entanglement with low water pressure, the texture is good. Then, the formation of the composite non-woven fabric 1 is made low by the water flow entanglement of such low water pressure or by the low basis weight of the pulp fibers of the spunbonded non-woven fabric 110 or the wet paper web 120, and the softness, bulkiness and texture are improved. Even if it is improved, the texture is good, so that the strength is secured when it is dry and when it is wet. Therefore, it is possible to achieve both flexibility and strength of the composite nonwoven fabric 1.

Further, according to the composite nonwoven fabric manufacturing apparatus or composite nonwoven fabric manufacturing method of the present embodiment, the pulp dispersion liquid 212 in which pulp fibers are dispersed in water W is produced to form a wet paper web 120, and the wet paper web 120 is formed. The 120 is superposed on the spunbonded non-woven fabric 110 and subjected to spunlacing treatment. In the formation of such a wet paper web 120, the concentration of the pulp fibers of the wet paper web 120 is adjusted by adjusting the concentration of the pulp fibers dispersed in water W. , Easy to control the texture. In addition, since the pulp fibers of the wet paper web 120 to be laminated on the spunbonded non-woven fabric 110 are in a wet state, they are less likely to be scattered by the water jet, and as described above, the pulp fibers are excellent in forming a texture and the pulp fibers are unevenly distributed. Since there is little runoff, the supply amount of pulp fibers of the wet paper web 120 to be superposed on the spunbonded nonwoven fabric 110 is easily reflected in the characteristics of the composite nonwoven fabric 1. Therefore, it is easy to set the blending ratio of the resin fiber and the pulp fiber, and it is possible to easily set any characteristics such as the basis weight, mechanical strength, water retention, and water absorption of the composite nonwoven fabric 1.

In particular, when the water content of the wet paper web 120 to be superposed on the spunbonded non-woven fabric 110 placed on the net conveyor NC2 in the laminated portion 31 is preferably in the range of 60% by mass to 80% by mass, sufficient moisture content is obtained. Depending on the amount, the bond between the pulp fibers of the wet paper web 120 is weak, and the resin fibers and the pulp fibers can be brought close to each other by the surface tension of water. Therefore, the wet paper web 120 is stacked on both sides of the spunbonded non-woven fabric 110. Even if they are not combined, the pulp fibers can be uniformly penetrated into the resin fibers of the spunbonded nonwoven fabric 110 and entangled by simply superimposing the wet paper web 120 on one side of the spunbonded nonwoven fabric 110. Further, even when the spunbonded non-woven fabric 110 has a low basis weight, the strength is such that the resin fibers do not fall off or flow out due to the moisture and weight of the wet paper web 120. Therefore, the composite non-woven fabric 1 having almost no difference between the front and back surfaces and having an extremely excellent texture can be obtained.

Then, according to the composite nonwoven fabric manufacturing apparatus of the present embodiment, the spunbonded nonwoven fabric manufacturing unit 10 uses the spunbond web forming unit 11 for forming the spunbond web 110A made of resin fibers and the resin fibers of the spunbond web 110A. The spunbonded non-woven fabric 110 is formed by the heat embossing portion 12 which is partially heat-welded by the heat embossing rolls 121 and 122.
Further, according to the composite nonwoven fabric manufacturing method of the present embodiment, the spunbonded nonwoven fabric manufacturing process includes a spunbond web forming step of forming a spunbond web 110A made of resin fibers and a thermal embossing of the resin fibers of the spunbond web 110A. The spunbonded non-woven fabric 110 is formed by a heat embossing step in which the rolls 121 and 122 are partially heat-welded.

From this, in the spunbonded non-woven fabric 110 of the present embodiment, the wet paper web 120 in a wet state having a water content in the range of 60% by mass to 80% by mass is superposed on the laminated portion 31, and the moisture thereof is removed. Even if it penetrates into the spunbonded non-woven fabric 110, receives the weight of the wet paper web 120, and is further spunlaced in that state, the strength and morphological stability are high due to the heat fusion point (embossing) of the spunbonded non-woven fabric 110. As a result, the elongation is suppressed, so that the resin fibers of the spunbonded non-woven fabric 110 having a desired low texture are less likely to fall off, and the resin fibers flow and move less, but are heat-melted. Since the resin fibers of the non-woven fabric are accumulated in a state of free movement, the pulp fibers can be evenly penetrated between the resin fibers. Therefore, even when the spunbonded nonwoven fabric 110 has a low basis weight, the composite nonwoven fabric 1 which can secure strength and has a stable texture can be obtained. Therefore, even when the composite nonwoven fabric 1 is softened by a low basis weight, the wet strength when a liquid such as water, a chemical, or a cosmetic amount is infiltrated can be maintained satisfactorily, and the composite nonwoven fabric 1 is not easily torn during use. That is, it is possible to improve the flexibility and strength of the composite non-woven fabric 1. In addition, thermal embossing can give a thick and bulky feeling.

In the embossing at this time, for example, the X-axis component orthogonal to the Y-axis component in the transfer direction of the spunbonded non-woven fabric 110 is long in the Y-axis component direction, and the width of the heat-sealed portion in the X-axis component direction. When Xa is the width Xb of the non-fused portion, the range is Xa <Xb, and the length Ya of the heat-sealed portion in the Y-axis component direction and the length Yb of the non-heat-fused portion in the Y-axis component direction. Is an arrangement on a straight line in the Y-axis component direction, and both sides of the 1/2 position of the length Ya of the heat-sealed portion in the Y-axis component direction have the length Yb of the non-heat-sealed portion and heat. Both sides of the 1/2 position of the length Yb in the Y-axis component direction of the length of the non-fused portion are set to the length Ya of the heat-fused portion.

In such embossing, since the surface of the width Xa of the heat-sealed portion and the length Ya of the heat-sealed portion is heat-sealed, the external force is oblique as well as the X-axis component direction and the Y-axis component direction. On the other hand, it is strong and does not stretch or shrink horizontally. That is, when tension is applied to the width Xa of the heat-sealed portion in the X-axis component direction and the width Xb of the non-heat-fused portion in the X-axis component direction, the width Xb of the non-heat-fused portion and the length of the non-heat-fused portion are applied. An external force is applied to Yb, and the tensile force becomes the weakest in the X-axis component direction, but the external force applied in another oblique angle or in the Y-axis component direction is the area Xa · Ya with the width Xa of the embossed portion. It is dispersed and has a structure that can withstand external forces.

In this way, the width Xa of the heat-sealed portion in the X-axis component direction and the width Ya of the heat-sealed portion in the Y-axis component direction form a partially heated convex portion 121a, which is thermally smoothed with the heat embossed convex portion roller 121. Since the surface of the heat-sealed portion width Xa and the heat-sealed portion length Ya is embossed by the roller 122, the vertical elongation and the lateral shrinkage are counteracted as internal strains. As a whole, it has strong resistance to vertical stretching and horizontal shrinkage and does not change its shape.

That is, both ends of the width Yb of the portion not heat-sealed in the Y-axis component direction are within both ends shorter than the length Ya of the adjacent heat-sealed portion regardless of whether it is dry or wet. Since no external force is applied to both ends of the length Ya of the heat-sealed portion, it is soft even when the product is used, and even if it is soft, the fibers do not fall off and it is a bulky process with a strong waist that does not stretch or shrink laterally. Therefore, it is soft at the time of use, the fibers and products do not fall off, and it is strong and does not stretch or shrink laterally, and bulky processing and mechanical strength can be arbitrarily formed.
In particular, the width Xa of the heat-sealed portion in the X-axis component direction and the width Ya of the heat-sealed portion in the Y-axis component direction form a fused portion that is heat-sealed by being partially embossed. Since it does not stretch or shrink laterally, it is possible to suppress the flow and movement of the resin fibers during the spunlace treatment and improve the formation of the texture.

Further, according to the composite nonwoven fabric manufacturing apparatus or the composite nonwoven fabric manufacturing method of the present embodiment, when the basis weight of the spunbonded nonwoven fabric 110 is 5 to 20 g / m ² , the wet paper webs 120 in a wet state are overlapped. It has strength that is hard to tear even if it is made, and it is possible to secure an excellent texture and increase flexibility. In particular, the composite non-woven fabric 1 becomes soft even when it gets wet.

Further, according to the composite nonwoven fabric manufacturing apparatus or composite nonwoven fabric manufacturing method of the present embodiment, the water pressure of the water column flow when the water flow is entangled by the spunlace processing unit 32 is within the range of ^{2 × 10 6} to 2 × 10 ^{7 Pa.} In this case, it is possible to prevent the pulp fibers from scattering, improve the yield, enable low graining, prevent stiffness, improve flexibility and bulkiness, and finish with a good texture. In addition, in a water column flow with low water pressure, durability can be improved by reducing damage to the fiber surface and fluffing.

When the present invention is carried out, the drying portion 33 may be dried by a hot embossing roll to perform embossing, or a heat embossing portion may be provided after the drying portion 33. When heat embossing is performed after the drying portion 33, the shape retention of the embossing is good. In addition, it is possible to more effectively prevent the fibers from falling off, improve the processing suitability, and suppress the elongation.

By the way, in the case of carrying out the present invention, the spunbonded nonwoven fabric 110 is not limited to one layer, and two or more layers may be laminated. The "layer" of the non-woven fabric layer means a non-woven fabric having a thickness of not "0". The plurality of layers of two or more layers may be, for example, one in which only the spunbonded non-woven fabric layer is directly laminated as a "spunbonded non-woven fabric layer" + "spunbonded non-woven fabric layer", or "spunbond". A combination of "spunbond non-woven fabric layer" + "melt-blow non-woven fabric layer" + "spunbond non-woven fabric layer" in which a "melt-blown non-woven fabric layer" is laminated between the "nonwoven fabric layer" and the "spunbond non-woven fabric layer" may be used. As a result, as long as it has a "spun-bonded non-woven fabric layer", it may have another non-woven fabric layer or a synthetic resin layer. A composite layer exhibiting each performance can be formed from the arrangement position of the spunbonded non-woven fabric and the thickness thereof.
The "melt blow non-woven fabric layer" is a layer in which a molten thermoplastic resin is installed after an extruder, and a high-speed high-temperature airflow is blown onto a net conveyor or a collection screen from the installed die (spun). , Fiber size is φ1 μm to 15 μm, usually formed by creating a self-adhesive web of 2-4 μm. In the superposition of two or more layers, the non-woven fabric layers are usually thermocompression bonded and heat-sealed. That is, the webs of each layer are laminated, and the webs laminated by the heat embossing rolls 121 and 122 are thermocompression-bonded and heat-sealed at the heat-embossing portion 12 to form two or more layers fused and bonded. it can. In this case, the basis weight of each web to be laminated is made uniform, and the softness of each layer is determined. When carrying out the present invention, whether or not the spunbonded nonwoven fabric 110 has two or more layers is determined by the application.

Further, the wet paper web 120 is not limited to pulp fibers, and can be a wet web 120 composed of a plurality of types of fibers in which different kinds of fibers such as recycled fibers, glass fibers, and synthetic resin fibers are mixed. It is also possible to mix a plurality of fibers in an arbitrary ratio depending on the above. By mixing these multiple types, it is possible to easily have a wide range of characteristics and functionality due to the performance of various fibers.

In carrying out the present invention, the configuration of the composite nonwoven fabric manufacturing apparatus and other parts of the composite nonwoven fabric manufacturing process is not limited to the above-described embodiment.
In addition, not all of the numerical values given in the embodiments of the present invention indicate critical values, and certain numerical values are values determined from the manufacturing cost, easy-to-manufacture form, etc., and are suitable for implementation. Since it indicates a value, even if the above value is slightly changed within the permissible value, its implementation is not denied.

1 Composite non-woven fabric 10 Spunbond non-woven fabric manufacturing part 11 Spunbond web forming part 12 Thermal embossing part 20 Wet papermaking web forming part 21 Pulp dispersion preparation part 22 Papermaking part 31 Laminating part 32 Spun lace processing part 33 Drying part 110 Spunbond non-woven fabric 120 Wet Paper Web 121 Thermal Embossed Convex Roller 122 Thermal Smoothing Roller

Claims (10)

A spunbonded non-woven fabric manufacturing section that forms a spunbonded non-woven fabric made of resin fibers,
The wet state of the pulp fibers is composed of a pulp dispersion preparation unit that prepares a pulp dispersion by dispersing pulp fibers in water and a papermaking unit that draws the pulp fibers of the pulp dispersion onto a net. Wet pulp making web forming part that forms paper web,
A laminated portion in which the spunbonded non-woven fabric is placed on a net conveyor and the wet paper web is superposed on the spunbonded non-woven fabric.
A spunlace processing unit that integrates the resin fiber of the spunbonded non-woven fabric and the pulp fiber of the wet paper web superposed on the resin fiber by water flow confounding.
A composite non-woven fabric manufacturing apparatus comprising the resin fibers integrally entangled in the spunlace processing portion and a drying portion for drying the pulp fibers. The spunbonded nonwoven fabric manufacturing section forms the spunbonded nonwoven fabric by a spunbonded web forming section that forms a spunbonded web made of the resin fiber and a heat-embossed section that heat-embosses the spunbonded web. The composite nonwoven fabric manufacturing apparatus according to claim 1. The composite nonwoven fabric manufacturing apparatus according to claim 1 or 2, wherein the spunbonded nonwoven fabric has a basis weight in ^{the range of 5 to 20 g / m 2.} The first to third claims, wherein the water content of the wet paper web to be laminated on the spunbonded non-woven fabric placed on the net conveyor in the laminated portion is in the range of 60 to 80% by mass. The composite nonwoven fabric manufacturing apparatus according to any one. Any one of claims 1 to 4, wherein the water pressure of the water column flow when the water flow is entangled in the span race processing unit is in ^{the range of 2 × 10 6} to 2 × 10 ^{7 Pa.} The composite nonwoven fabric manufacturing apparatus according to the above. A spunbonded non-woven fabric manufacturing process for forming a spunbonded non-woven fabric made of resin fibers,
Wetness of the pulp fibers by a pulp dispersion preparation step of dispersing pulp fibers in water to prepare a pulp dispersion and a papermaking step of drawing the pulp fibers of the pulp dispersion on a net. Wet pulp making web forming process to form paper web,
A laminating step of placing the spunbonded non-woven fabric on a net conveyor and further superimposing the wet paper web on the spunbonded non-woven fabric.
A spunlace treatment step of integrating the resin fibers of the spunbonded non-woven fabric and the pulp fibers of the wet paper web superposed therewith by water flow confounding.
A method for producing a composite non-woven fabric, which comprises a drying step of drying the resin fibers and the pulp fibers integrally entangled in the spunlace processing portion. In the spunbonded nonwoven fabric manufacturing step, the spunbonded nonwoven fabric is formed by a spunbonded web forming step of forming a spunbonded web made of the resin fiber and a thermal embossing step of heat-embossing the spunbonded web. The method for producing a composite nonwoven fabric according to claim 6. The method for producing a composite nonwoven fabric according to claim 6 or 7, wherein the spunbonded nonwoven fabric has a basis weight in ^{the range of 5 to 20 g / m 2.} The sixth to eighth claims, wherein the water content of the wet paper web to be laminated on the spunbonded non-woven fabric placed on the net conveyor in the laminating step is in the range of 60 to 80% by mass. The method for producing a composite nonwoven fabric according to any one of them. ^{One of claims 6} to 9, wherein the water pressure of the water column flow when the water flow is entangled in the span race processing unit is in the range of 2 × 10 6 to 2 × 10 ^{7 Pa.} The method for producing a composite nonwoven fabric according to.

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