JPH10262884A - Wiper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper made of nonwoven fabric of short fibers, which is highly storing in nonwoven fabric strength, reliably collects dusts to be collected not only on the nonwoven fabric surface but also in the inside and recessed parts and which can be used for a long time without falling off of the collected dusts. SOLUTION: A piece of thermally fused nonwoven fabric containing at least 30 wt.% of thermally fusing and crossing short fibers of 3-25 mm fiber length and more than 50% of crossing angular distribution of a specific crossing angle formed by the fused part and a heavy denier fiber net having the entire denier of 100-2000 are layered, a protrusion/recess having more than 0.2 mm difference of unevenness is formed and a minimum vertical or horizontal strength is made to be more than 1000 gf/5 cm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0010]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper made of non-woven fabric for household use, industrial use and the like.

[0011]

2. Description of the Related Art As wipers for wiping kitchin, human hands, toilets, etc., nonwoven fabric wipers in which hydrophilic fibers such as pulp or rayon are entangled, or binders are applied to the hydrophilic fibers. A nonwoven wiper or the like is used. Further, a wet towel or the like in which the nonwoven fabric contains water and the wiper is closely packaged with a film is also used. The wipers and wet towels can be used for a relatively short period of time or for applications with little dirt, but they have problems such as lack of strength and fuzz, and are used for a long period of time or are relatively heavy. It cannot be used for repeated wiping under load.

Japanese Unexamined Patent Publication (Kokai) No. 4-96824 discloses a nonwoven fabric wiper obtained by mixing a splittable ultrafine fiber and a large fineness fiber, and further performing an entanglement treatment. Japanese Patent Application Laid-Open No. 4-288113 discloses a cleaning sheet in which a fibrous web is laminated on a sheet such as a heat-shrinkable film and the like is thermocompressed with a hot embossing roll to form irregularities on the nonwoven fabric. ing. The nonwoven fabric wipers and the like disclosed in the above two publications have the effect of storing and capturing relatively coarse dust in the concave portions because the nonwoven fabric has an uneven shape. However, neither of them discloses an appropriate height difference between the concave portion and the convex portion. Further, the nonwoven fabric is a product obtained by entanglement of a card-processed web, and the intersection of the fibers is not heat-sealed, or is only an insufficient point-like fusion due to embossing roll. Further, the nonwoven fabric is one in which the fibers are oriented in the machine direction, and not the one in which the fibers are oriented in the random direction. Therefore, the wiper has a small apparent specific volume of the nonwoven fabric and a low strength of the wiper after lamination. Therefore, fuzz comes out during use,
There are problems such as fluffs remaining on corners of furniture to be wiped, etc., and inability to withstand long-term use. Also the wiper mentioned above
The hair, sand, and the like to be captured are captured by the fluff and the like on the surface of the nonwoven fabric, but sand, hair, and the like hardly enter the inside of the nonwoven fabric.
Therefore, there is a problem that sand and the like easily fall off after being captured.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to accurately capture dust and the like to be captured on the surface of the nonwoven fabric, the inside of the nonwoven fabric, and the concave portion, and the captured dust is less likely to fall off.
An object of the present invention is to provide a non-woven wiper which has a large strength, a large apparent specific volume, and can be used for a long time. Another object of the present invention is to provide a non-woven wiper.

[0014]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and has the following arrangement. (1) Single yarn fineness 0.6 to 50 denier, fiber length 3 to 2
A wiper having a multilayer structure in which a short fiber nonwoven fabric containing at least 30% by weight of 5 mm heat-fusible short fibers and a net made of heat-fusible large-fine fibers having a total fineness of 100 to 2,000 deniers are laminated. The short fiber nonwoven fabric has the intersections of the heat-fusible short fibers fused together, and the intersection angle distribution formed by the intersections occupies 50% or more of the total intersection points with an intersection angle of 60 to 90 degrees; Has an apparent specific volume of 40 to 250 cm ³ / g
And the short fiber nonwoven fabric and the net are integrated, and the short fiber nonwoven fabric has a height difference of at least 0.
A wiper in which unevenness having a length of 2 mm is formed along the eyes of the net and has a vertical or horizontal strength of 1000 gf / 5 cm or more. (2) The wiper according to (1), wherein a short fiber non-woven fabric having a fiber mass having a width of 2 mm or more and 20 fibers / m ² or less and a net made of heat-fusible large fineness fibers are fused. (3) The heat-fusible short fiber is a composite fiber composed of two or more thermoplastic resins having a difference in melting point of 15 ° C. or more, and the low-melting thermoplastic resin forms at least a part of the fiber surface. The wiper according to (1) or (2), which is a composite fiber. (4) The net made of the heat-fusible fine fiber is a composite fiber made of two or more thermoplastic resins having a melting point difference of 15 ° C. or more, and the low melting thermoplastic resin forms at least a part of the fiber surface. (1) The wiper according to any one of (1) to (3), wherein the wiper is a heat-fusible composite monofilament, and the intersection of the monofilaments is fused. (5) The heat in which the net made of the heat-fusible large fineness fiber is made of two or more thermoplastic resins having a difference in melting point of 15 ° C. or more, and the low melting thermoplastic resin forms at least a part of the fiber surface. The wiper according to any one of (1) to (3), wherein the wiper is a fusible composite flat yarn and the intersection of the flat yarn is fused. (6) The wiper according to any one of (1) to (5), wherein the heat-fusible short fiber is a fiber using any of a polyolefin-based thermoplastic resin and a polyester-based thermoplastic resin. (7) The net made of the heat-fusible large fineness fiber is a fiber in which any of a polyolefin-based thermoplastic resin and a polyester-based thermoplastic thermoplastic resin is used (1) to (1).
The wiper according to any one of the above items (6). (8) 2 to 100 parts by weight of one or more oils selected from mineral oil, synthetic oil, silicone oil, and surfactant adhere to 100 parts by weight of the short fiber nonwoven fabric. The wiper according to any one of the above (1) to (7).

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The short fiber non-woven fabric used in the wiper of the present invention has a single fiber fineness of 0.6 to 50 denier.
At least 3 heat-fusible short fibers having a fiber length of 3 to 25 mm
0% by weight, the fibers are oriented randomly so that the intersections of the heat-fusible short fibers are fused, and the crossing angle distribution formed by the fused portions has a specific value. It is a large-volume nonwoven fabric. The short-fiber nonwoven fabric contains 30 to 100% by weight of the heat-fusible short fiber, and 7
0 to 0% by weight. The mixing ratio of the heat-fusible short fibers is preferably 40 to 100% by weight, more preferably 50 to 100% by weight.
100% by weight. As the heat-fusible short fibers, any of regular fibers made of a thermoplastic resin (fibers made of a single component, the same applies hereinafter), and composite fibers made of a thermoplastic resin can be used. As the other short fibers, fibers having different hydrophilicity, melting point, coloring property, dyeing property, heat shrinkability, single yarn fineness, fiber length, and the like from the heat-fusible short fibers can be used.

As the thermoplastic resin to be fiberized, for example, polyolefins such as high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polypropylene, binary and ternary copolymers of propylene with other α-olefins, polyethylene terephthalate Polyesters such as low-melting polyesters obtained by copolymerizing polyethylene terephthalate and isophthalic acid, polyesters such as polybutylene terephthalate, and nylons.
6, polyamides such as nylon-66, resins such as polyvinylidene fluoride, polyphenylene sulfide, polyvinyl chloride, and polyvinylidene chloride, and mixtures of the above resins.

In the case of regular short fibers, a fiber obtained by spinning the above-mentioned thermoplastic resin and forming a fiber can be used. In particular, polyolefin fibers, polyethylene terephthalate fibers, and the like can be preferably used in terms of the oil adsorbing property of the fibers and the price. In the case of composite short fibers, the thermoplastic resin is sheath-core type,
Composite spun fibers such as side-by-side, sea-island and multi-split types can be used. The composite fiber is a plurality of thermoplastic resins used, and any of a composite fiber having a difference in melting point and a composite fiber having no difference in melting point can be used. A so-called heat-fusible conjugate fiber in which a low-melting thermoplastic resin forms at least a part of the fiber surface and a high-melting thermoplastic resin forms another part, such as a conjugate fiber of a sheath-core type or a parallel type. In this case, the fibers are not completely melted by the heat treatment at the time of forming the nonwoven fabric as described later, and have both the heat-fusing property and the shape retention property of the fiber, so that a porous and high-strength nonwoven fabric can be obtained. In the case of the heat-fusible conjugate fiber, a combination of a resin having a melting point difference of 15 ° C. or more between the low melting point thermoplastic resin and the high melting point thermoplastic resin is preferable. For example, high density polyethylene / polypropylene, low density polyethylene / polypropylene,
High density polyethylene / polyethylene terephthalate, low melting point polyethylene terephthalate / polyethylene terephthalate, linear low density polyethylene / polypropylene,
A combination such as nylon-6 / nylon-66 can be exemplified. The composite ratio of the low-melting thermoplastic resin to the high-melting thermoplastic resin is such that the low-melting thermoplastic resin is 20 to 80% by weight and the high-melting thermoplastic resin is 80 to 20% by weight, and preferably (30 to 70) weight respectively. % / (70-30)% by weight, more preferably (35-65)% by weight / (65-35)% by weight.

As an example of a conjugate fiber having almost no difference in melting point between a plurality of thermoplastic resins constituting the conjugate fiber, a conjugate fiber composed of a combination of the same resins having different molecular weights and molecular weight distributions can be exemplified. The conjugate fiber can impart functions such as three-dimensional crimping, heat shrinkability of the nonwoven fabric, and bulkiness of the nonwoven fabric. Although the molecular weight and the molecular weight distribution are almost the same, a composite fiber or the like composed of a combination of resins in which various additives added to each resin are different can also be exemplified. For example, a composite fiber composed of a combination of a resin in which a hydrophilic agent is added only to a sheath component and a hydrophilic agent is not added to a core component, and a composite fiber composed of a resin in which a pigment is added to a core component using a resin in which a sheath component is not added with a pigment. Fibers and the like can be exemplified.

The heat-fusible short fiber has a single-fiber fineness of 0.6 to 0.6.
It is a short fiber having a denier of 50 and a fiber length of 3 to 25 mm.
The single yarn fineness is preferably 0.7 to 30 denier, more preferably 0.8 to 10 denier. Single yarn fineness is 0.6
If it is less than denier, it will be a nonwoven fabric with poor uniform opening and uniform dispersion of fibers, and if it exceeds 50 denier, the texture will be poor, and if it is used as a wiper, it may cause small scratches on furniture etc. There are problems such as. The fiber length is 3mm
If it is less than 1, the fiber becomes powdery, a large amount of lumps are mixed, or the unwoven fabric after heat treatment contains a large amount of unfused fiber, and when used as a wiper, short fibers fall off. When the thickness exceeds 25 mm, it is difficult to form a uniform web, which is not preferable. . Other short fibers have a single yarn fineness of 0.6 to 50 denier and a fiber length of 3 to 25 mm. The preferred range of single fiber fineness and fiber length is the same as that of the heat-fusible short fiber.

The short-fiber nonwoven fabric used for the wiper of the present invention is obtained by mixing 30 to 100% by weight of the heat-fusible short fibers with 70 to 0% by weight of other short fibers and forming a web by an air lay method or the like. And a heat treatment at a temperature higher than the temperature at which the heat-fusible short fibers are fused, and fusing the intersections of the heat-fusible short fibers. Of course, the heat treatment may be performed after laminating the web and the large fine fiber net. The method for producing the nonwoven fabric is not particularly limited as long as the object of the present invention of orienting the short fibers in the random direction is achieved. The crossing angle is used as a measure of the random orientation of the short fibers. As the production method, there is a method in which a mixed web is passed while being rotated by a cylindrical screen, and the web is collected on a net conveyor or the like. Further, a method of passing the mixed web through a box-shaped screen while vibrating the screen and collecting the mixed web on a net conveyor or the like, a method of directly scattering and accumulating the mixed web on the net conveyor, and the like can be exemplified.

The short-fiber nonwoven fabric constituting the wiper of the present invention is laminated with a large fineness net, which will be described later, and in the state of the wiper, the intersection angle distribution of the intersections due to the fusion of the heat-fusible short fibers is the total intersection. At an intersection angle of 60 to 90 degrees. That is, the minimum crossing angle is 60 to 90 degrees among the four crossing angles formed by the portion where the heat-fusible staple fibers or the heat-fusible staple fibers and other staple fibers intersect and where the intersection points are fused. A nonwoven fabric that is at least 50% of the total number of intersections where an object is fused. The nonwoven fabric has an apparent specific volume of 40 to 25.
0 cm ³ / g. Preferably 43 to 200 cm ³ /
g, more preferably 45 to 185 cm ³ / g. By taking the bulky specific volume, dust is reliably captured in the void.

The non-woven fabric is preferably a uniform dispersion of each short fiber having good spreadability. As a measure of the spreadability of the short fibers, a fiber mass having a width of 2 mm or more and 20 lumps / m ² or less is preferable. The fiber mass is used to prevent the adhesion of short fibers to each other due to adhesion or the like during the production of short fibers, to set production conditions such as adhesion of an oil agent having good releasability between short fibers, and to set the production conditions when producing a nonwoven fabric. This can be achieved with care.

The fine fiber fiber net, which is another member constituting the wiper of the present invention, has a total fineness of 100 to 200.
This is a net in which 0 denier fibers are woven. As the large fineness fiber, any of monofilament, spun yarn, composite monofilament, flat yarn, multilayered flat yarn, and multifilament can be used. In particular, regular monofilament and thermoplastic resin are used,
The low-melting thermoplastic resin forms at least a part of the fiber surface, and the high-melting thermoplastic resin constitutes the other part. A composite monofilament such as a sheath-core type, a side-by-side type, etc. It is preferably used because it has dual properties and heat-fusibility between the filament and the short fiber nonwoven fabric. Further, the filament is preferably one having heat shrinkage. The heat shrinkage is performed by heat-treating the short-fiber nonwoven fabric and the net after lamination described below, and when both are integrated, by heat shrinkage,
It is sufficient that the short fiber non-woven fabric layer forms irregularities. In the case of a heat-shrinkable net, the area shrinkage ratio may be 5 to 50%. Examples of the heat-shrinkable monofilament include a latent heat-shrinkable monofilament and a latent heat-shrinkable flat yarn using a terpolymer or the like of propylene and another α-olefin. Further, a monofilament or a flat yarn drawn at a low temperature and having a relatively large latent heat shrinkage can be used. The total fineness of the large fineness fiber is 10
0 to 2000 denier, preferably 110 to 10
00 denier, more preferably 130 to 500 denier. When the total fineness is less than 100 denier, it is difficult to make a strong non-woven fabric layer as described later and to make the non-woven fabric layer uneven.
If it exceeds 2,000 denier, a high strength laminated non-woven fabric described later can be obtained. However, when the texture of the non-woven fabric becomes hard, or when the non-woven fabric is cut into a predetermined size and used as a wiper, the cut surface becomes thicker. When the fine fibers protrude and wipe furniture or the like, small scratches may be caused, which is not preferable. The size of the eye of the net is 25
９００900 mm ² is sufficient. The size of the eyes is preferably 36 to 625 mm ² , more preferably 49 to 400 m
m ² . The net may be either a fusion-bonded or unfused fiber at the intersection of the fibers after weaving.

The short fiber nonwoven fabric wiper of the present invention is obtained by laminating the short fiber web before the heat fusion treatment or the short fiber nonwoven fabric subjected to the heat fusion treatment and the large fineness fiber net, and further heat-treating the both. Are obtained by integrating Lamination of the short fiber nonwoven fabric and the net is performed alternately, and there is no particular upper limit on the number of layers, but it should be selected according to the purpose and application. It is considered that the number of layers is practically up to about six. Due to the heat treatment after lamination, the net thermally shrinks, the short fiber non-woven fabric has a convex portion at the eye portion of the net (a portion where no net exists), and a concave portion at the contact portion with the thick fiber (net).
A nonwoven fabric having an uneven shape as a whole is obtained. The wiper of the present invention only needs to have a difference between the convex portion and the concave portion of 0.2 mm or more.
This difference is preferably 0.25 to 6 mm or more, and more preferably 0.3 to 4 mm or more. When the basis weight of the nonwoven fabric is small and the heat shrinkage of the net is large, a product having a large difference between the convex portion and the concave portion is obtained. This difference is 0.2
If it is less than mm, dust and the like after collection are likely to fall off. 6
mm, but it requires a special manufacturing method,
The wiper is relatively expensive. Further, the wiper of the present invention may have a difference in unevenness between the front surface and the back surface. The short-fiber nonwoven fabric on the surface may have a convex portion corresponding to the net eyes and a concave portion corresponding to the rear eyes. In this case, the difference in the irregularities on the back surface is such that the height difference is 0.2 mm or more because the large fineness fiber portion of the net is convex and the gap corresponding to the eye of the net forms a depression. Of course, if the height difference of the surface irregularities is 0.2 mm or more, the surface irregularity difference is 0.2 mm.
mm or less. In the present invention, the height difference of the unevenness,
From a micrograph of a cross section in which the top of the nonwoven fabric protrusion was cut vertically, the difference between the top and bottom was determined at 10 points, and the average value (mm) was taken as the height difference. The wiper according to the present invention may be a wiper having a non-woven fabric formed into an uneven shape by hot embossing roll or the like. In the case of an embossing roll, the uneven portions may be formed independently of the eyes of the net. In the wiper of the present invention, the short-fiber nonwoven fabric and the net are integrated by a water entanglement method, a needle punching method, or the like, a binder bonding treatment, or the like, substantially without heat fusion. It may be a thing done.

The wiper of the present invention has a vertical or horizontal strength of 1000 gf / 5 cm or more. The strength is preferably at least 1200 gf / 5 cm, more preferably at least 1500 gf / 5 cm. The strength is 1000g
When it is less than / 5 cm, it is difficult to repeatedly use it for a long period of time because tearing or the like easily occurs when wiping is performed.

The short-fiber nonwoven fabric wiper of the present invention is characterized in that one or more oils selected from mineral oil, synthetic oil, silicone oil, and surfactant are added to the short-fiber nonwoven fabric.
It may be 2 to 100 parts by weight attached to parts by weight. As the mineral oil, paraffin hydrocarbons,
Examples include naphthenic hydrocarbons and aromatic hydrocarbons.
Examples of the synthetic oil include an alkylbenzene oil, a polyolefin oil, a polyglycol oil and the like. Examples of the silicone oil include linear dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylhydrogenpolysiloxane, and various modified silicones. Examples of the surfactant include cationic long-chain alkyltrimethylammonium salts having an alkyl or alkenyl group having 10 to 22 carbon atoms, dilong-chain alkyldimethylammonium salts, and mono-long-chain alkyldimethylbenzylammonium salts. Surfactants can be exemplified. Polyoxyethylene (6-35 mol) long-chain alkyl or alkenyl (primary or secondary C8-C22) ether; polyoxyethylene (6-35 mol) alkyl (C8-C18) phenyl ether; And polyethylene glycol ether type, polyoxyethylene polyoxypropylene block copolymer, glycerin fatty acid ester, sorbitan fatty acid ester, and polyhydric alcohol type such as alkyl glycoside. The oil is applied by dipping, spraying,
What is necessary is just to adhere to a nonwoven fabric by the rubbing method. The amount of the oil agent is 2 to 100 parts by weight based on 100 parts by weight of the short fiber nonwoven fabric. The amount of the oil agent is preferably 2.5 to 80 parts by weight, more preferably 3 to 70 parts by weight. If the amount of adhesion is less than 2 parts by weight, the effect of glossiness of furniture and the like due to the adhesion of the oil agent is not remarkable, and if it exceeds 100% by weight, the wiper sticks and the oil agent adheres to human hands. It is not preferable.

[0027]

The present invention will be described in more detail with reference to the following examples.
In each of the examples, evaluation of physical properties, wiping properties, and the like of the wiper was performed by the following methods. Powerful: wiper 5cm x 15cm vertically and horizontally
5 test pieces each having a size of Using a tensile strength tester, determine the average strength in each direction. Of the strengths in the vertical and horizontal directions, the weaker strength was defined as the stronger. Unit, gf / 5 cm. Crossing angle distribution: The nonwoven fabric is photographed using an electron microscope. According to the photograph, the heat-fusible short fibers cross each other and the intersection thereof is fused, and / or the heat-fusible short fibers and other short fibers cross each other and the intersection is fused. The minimum intersection angle of 100 or more of the four intersection angles formed by the intersection is measured. The content (%) of the object having the minimum intersection angle of 60 to 90 degrees is calculated. Crossing angle distribution (%) = (number of minimum crossing angles of 60 to 90 degrees / total number of measured crossings) × 100

Apparent specific volume of short-fiber nonwoven fabric: The short-fiber nonwoven fabric is peeled off from the wiper, the thickness and the weight are measured, and the apparent specific volume is calculated. Unit cm ³ / g.

Wiping property of human hair: length 10 on a metal desk
Take twelve cm human hair and spray them so that they are evenly distributed on the desk. Wipe three times lightly with a wiper of 20 cm x 20 cm in a circle. After wiping, the wiper is suspended vertically for 1 minute to allow the incompletely collected human hair to fall off naturally. Thereafter, the number of human hair collected on the wiper is counted. The wiping property was determined by the following judgment. Good: When 10 or more were collected. Defective: 9 or less. Flour wiping property: 0.8% of commercially available flour on a metal desk
Sprinkles g so that they are evenly distributed on the desk. 2
Wipe three times lightly with a wiper of 0 cm x 20 cm in a circle. After wiping, the wiper is hung vertically for 1 minute to allow the incompletely collected flour to fall off naturally. Thereafter, the weight of the uncollected flour remaining on the desk is measured, and the collection rate of the flour collected by the wiper is calculated.
The wiping property was determined by the following judgment. Good: 75% or more collected. Poor: when less than 75%.

Fiber lumps: The number of fiber lumps with or without fusion having a width of 2 mm or more in which short fibers are poorly spread and cohered and agglomerated is determined by using a wiper having a size of 20 cm × 20 cm with an expanding boundary. Count. The number of fiber masses is converted to the number per 1 m ² . Unit, pieces / m ² .

The difference in height of the unevenness of the wiper: The difference in height of one of the front and back surfaces having a large difference in height was measured. The height difference is obtained by measuring the difference between the top of the convex portion and the bottom of the concave portion of the short fiber nonwoven fabric layer at 10 points and calculating the average value. Unit mm. The height difference was determined from a micrograph.

EXAMPLE 1 A sheath-core type composite fiber having a sheath component of high-density polyethylene and a core component of polypropylene, and a heat-fusible short fiber having a single-filament fineness of 2.5 denier and a fiber length of 5 mm was air-laid. The web was manufactured by the method. The heat-fusible short fiber used was a strand chop having almost no crimp. The web was heat-treated using a through-air heat treatment machine at a temperature of 143 ° C. to obtain a nonwoven fabric in which the intersections of the short fibers were fused. Single yarn fineness 250
Using a monofilament made of denier crystalline propylene / ethylene / butene-1 copolymer, a plain woven fabric having a length / width of 2/25 mm was woven. The plain woven fabric was treated with a calender roll at a temperature of 136 ° C. to obtain a large fine fiber net in which the intersections of the fibers were fused. The non-woven fabric is laminated on the net, and the temperature is set to 143 using a through-air heat treatment machine.
C. to obtain a two-layer wiper in which the non-woven fabric and the net were heat-sealed and integrated. The wiper shrinks the fineness net by heat treatment, the nonwoven fabric of the eye portion corresponding to the gap of the net forms a convex portion, and the nonwoven fabric of the portion in contact with the fineness fiber of the net forms a concave portion. It was a product having irregularities formed on it. Table 1 shows the evaluation results of the physical properties and wiping properties of the wiper. From Table 1, the wiper of the present invention is strong,
It can be seen that the material has good performance such as wiping properties.

[0033]

[Table 1]

Example 2 A sheath-core type composite fiber having a sheath component of high-density polyethylene and a core component of polyethylene terephthalate, and having a single-filament fineness of 1.8 denier and a fiber length of 4 mm, is heat-fusible. A web was manufactured using short fibers by the air lay method as in Example 1. The heat-fusible short fiber used was a strand chop having almost no crimp. The web was slurried as in Example 1 above.
Heat treatment was performed at a temperature of 140 ° C. using an air-heat treatment machine to obtain a nonwoven fabric in which the intersections of the short fibers were fused. The same net and the heat-fusible short-fiber non-woven fabric were used for the material exemplified in Example 1 and laminated in a three-layer structure such as the non-woven fabric / the net / the non-woven fabric. The laminated nonwoven fabric is heat-treated at a temperature of 140 ° C. using a through-air heat treatment machine in the same manner as in Example 1 so that the short-fiber nonwoven fabric and the net are fused, and the short-fiber nonwoven fabric on the front surface and the short-fiber nonwoven fabric on the back surface are also thermally fused. Then, an integrated three-layer wiper was obtained. Due to the heat treatment, the heat-shrinking of the large fineness net causes the nonwoven fabric on the surface side of the eye portion corresponding to the gap of the net to form a convex portion, and the nonwoven fabric on the surface side of the portion in contact with the large fineness fiber of the net. A concave portion was formed, and the entire surface was formed with irregularities. On the back side, there were irregularities, but the difference was slightly smaller than on the front side. Physical properties of the wiper,
Table 1 shows the evaluation results of the wiping properties and the like. From Table 1, it can be seen that the wiper of the present invention has good performance such as strong and wiping properties.

EXAMPLE 3 A parallel type composite fiber comprising a propylene / ethylene / butene-1 copolymer as the first component and polypropylene as the second component, having a single yarn fineness of 3.2 denier and a fiber length of 10 mm. A web was produced by the air-lay method using the heat-fusible short fibers in the same manner as in Example 1. The heat-fusible short fibers used were fibers having three-dimensional crimps. The web was sampled in the form of a web without heat treatment before lamination. Using a monofilament made of a propylene / ethylene / butene-1 copolymer having a single-filament fineness of 290 denier, a plain woven fabric having a length and width of 3/25 mm was woven. The plain woven fabric is calendered at a temperature of 13 ° C.
The fiber was treated at 5 ° C. to obtain a large fine fiber net in which the intersections of the fibers were fused. Using the net and the short fiber web, the web / the net / the web were laminated in a three-layer structure. The laminated non-woven fabric is heat-treated at 145 ° C. using a through-air heat-treating machine in the same manner as in Example 1 to fuse the intersections of the short fibers, the short-fiber non-woven fabric and the net, and the short-fiber non-woven fabric on the front surface and the back surface. The short-fiber nonwoven fabric was heat-sealed to obtain a three-layer wiper. The wiper is heat-treated
The large fineness net shrinks, the nonwoven fabric on the surface side of the eye portion corresponding to the gap of the net forms a convex portion, and the nonwoven fabric on the surface side of the portion in contact with the fineness fiber of the net forms a concave portion, It was a product with irregularities formed. On the back side, there were irregularities, but the difference was slightly smaller than on the front side. Table 1 shows the evaluation results of the physical properties and wiping properties of the wiper. Table 1
From this, it can be seen that the wiper of the present invention has good performance such as strong and wiping properties.

Example 4 An eccentric sheath-core type composite fiber having a sheath component of high-density polyethylene and a core component of polypropylene, having a single yarn fineness of 3.1.
Denier, heat-fusible short fiber having a fiber length of 14 mm 35% by weight
And 65% by weight of a rayon having a single yarn fineness of 2.1 denier and a fiber length of 6 mm were mixed, and a web was manufactured by the air lay method as in Example 1. The heat-fusible short fibers used were fibers having three-dimensional crimps. The laser used as another short fiber
Yeon was a strand crunch without crimps. The web was sampled in the form of a web without heat treatment before lamination. The first component is a propylene / ethylene / butene-1 copolymer,
The second component is made of polypropylene, the first component constitutes a front layer and a back layer, and the second component uses a flat yarn having a denier of 210 denier in a three-layer structure forming an intermediate layer,
A plain woven cloth of 2 pieces / 25 mm in each of length and width was woven. The plain woven fabric was treated with a calender roll at a temperature of 134 to obtain a flat yarn net with fused fiber intersections. Using the net and the short fiber web, the web / the net / the web were laminated in a three-layer structure. The laminated nonwoven fabric was treated with a through-air-heat treatment machine in the same manner as in Example 1 above,
A heat treatment at a temperature of 145 ° C., a three-layer wiper in which the short fiber non-woven fabric and the short fiber non-woven fabric are fused together and the short fiber non-woven fabric on the front surface and the short fiber non-woven fabric on the back surface are fused together. I got The wiper shrinks the fine-fiber fiber net by heat treatment, the non-woven fabric on the surface side of the eye corresponding to the gap of the net forms a convex portion, and the non-woven fabric on the surface side of the part in contact with the fine-fiber fiber of the net Has a concave portion, and the entire surface has irregularities. On the back side, there were irregularities, but the difference was slightly smaller than on the front side. Table 1 shows the evaluation results of the physical properties and wiping properties of the wiper. From Table 1, it can be seen that the wiper of the present invention has good performance such as strong and wiping properties. Since the wiper contains hydrophilic fibers, the wiper has excellent water absorption.

Example 5 The same material as described in Example 1 was used by using the same air-laid short fiber web and large fine fiber net before heat treatment.
The net / web was laminated in a three-layer structure. Further, a water column entanglement treatment was carried out by a water needle method at a water pressure of 40 kgf / cm ² . Thereafter, the laminated nonwoven fabric was heat-treated at 145 ° C. using a through-air heat treatment machine in the same manner as in Example 1 to fuse the intersections of the short fibers and the short-fiber nonwoven fabric with the net and to form a short-fiber nonwoven fabric on the surface. The short-fiber nonwoven fabric on the back side was also heat-sealed to obtain a three-layer wiper integrated. The wiper shrinks the fine-fiber fiber net by heat treatment, the nonwoven fabric on the surface side of the eye corresponding to the gap of the net forms a convex portion, and the nonwoven fabric on the surface side of the part in contact with the fine-fiber fiber of the net Has a concave portion, and the entire surface has irregularities. On the back side, there were irregularities, but the difference was slightly smaller than on the front side. Table 1 shows the evaluation results of the physical properties and wiping properties of the wiper. From Table 1, it can be seen that the wiper of the present invention has good performance such as strong and wiping properties.

Example 6 The following oil agent was uniformly applied to the front and back surfaces of the integrated heat-treated wiper obtained in Example 3 by a spray method. The oil agent was 85% by weight of liquid paraffin and polyoxyethylene (average addition mole number: 3.3 moles) alkyl (C12
~ C13) It was a mixture with 15% by weight of ether. Through-air heat treatment was performed at a temperature of 80 ° C. after spraying. During this heat treatment, almost no heat shrinkage was observed in the nonwoven fabric. The amount of the oil agent attached to the short-fiber non-woven fabric, excluding the fineness net, was 4 parts by weight of the oil agent per 100 parts by weight of the short-fiber non-woven fabric. Table 1 shows the results of evaluation of the wiper and the like.
Shown in From Table 1, it can be seen that the wiper of the present invention has good performance such as strong and wiping properties. It was also confirmed that the surface of the desk after wiping with the wiper was glossy as compared to before the wiping.

COMPARATIVE EXAMPLE 1 A single yarn fineness of 3.0 denier, 51 mm in fiber length, 13 crimps / 25 mm in two-dimensional crimps having a two-dimensional crimp having a sheath component of high-density polyethylene and a core component of polypropylene. A card web was obtained using relatively long fibers. The web was heat-treated at 145 ° C. using the same through-air heat treatment machine as in Example 1 to obtain a non-woven wiper in which the intersections of the fibers were fused. The wiper was flat with no irregularities on the front and back surfaces. Table 1 shows the evaluation results of the physical properties and wiping properties of the wiper. From Table 1, it can be seen that the wiper of the present invention has a small strength, a small apparent specific volume, and poor performance such as wiping properties of human hair and sand. After wiping, the wiper had little penetration of human hair ends into the non-woven fabric, and little flour into the non-woven fabric, and often fell off during hanging for one minute vertically.

Comparative Example 2 A plain woven fabric having a length of 2 rows and a width of 25 mm was woven using a polypropylene monofilament having a fineness of 250 deniers. The plain woven fabric was treated with a calender roll at a temperature of 152 ° C. in the same manner as in Example 1 to obtain a large fine fiber net in which the intersections of the fibers were fused. The card web used in Comparative Example 1 and the large fineness net were laminated in a three-layer structure such as the wafer / the net / the web. The laminated non-woven fabric was used in Example 1
Similarly, heat treatment is performed at a temperature of 145 ° C. using a through-air heat treatment machine to fuse the intersection of the web fibers and the non-woven fabric with the net, and also heat-bond the non-woven fabric on the front surface and the non-woven fabric on the back surface together. A wiper having a three-layer structure was obtained. The wiper
Was a flat product in which the large fineness net did not shrink due to the heat treatment, and both the front and back surfaces had no irregularities. Table 1 shows the evaluation results of the physical properties and wiping properties of the wiper. From Table 1, it can be seen that the wiper of the present invention has a large strength, but has a small apparent specific volume and poor performance such as wiping properties of human hair and sand. After wiping, the wiper had little penetration of human hair ends into the non-woven fabric and little flour into the non-woven fabric, and often fell off during hanging for one minute vertically.

Comparative Example 3 An air-lay web was produced in the same manner as in Example 1 above, using a high-density polyethylene regular fiber having a single fiber fineness of 3.0 denier and a fiber length of 10 mm. The short fiber web had a large number of fiber clumps observed before the heat treatment. Using a through-air heat treatment machine as in Example 1 above,
Heat treatment was performed at a temperature of 135 ° C. to obtain a nonwoven fabric in which the intersections of the fibers were fused. The same net was used for the non-woven fabric and the material used in Comparative Example 2, and the three-layer structure was laminated like the non-woven fabric / the net / the non-woven fabric. The laminated nonwoven fabric was heat-treated at 135 ° C. using a through-air heat treatment machine as in Example 1;
A three-layer wiper was obtained by fusing the intersections of the fibers of the web and the non-woven fabric with the net, and also thermally fusing the non-woven fabric on the front surface and the non-woven fabric on the back surface. The wiper was a flat material in which the large fineness net did not shrink due to the heat treatment, and the front and back surfaces had no irregularities. Physical properties of the wiper,
Table 1 shows the evaluation results of the wiping properties and the like. From Table 1, it can be seen that the wiper of the present invention has high strength, but has a small apparent specific volume and poor performance such as wiping properties of human hair and flour. Also, after wiping, the wiper is less likely to enter the inside of the non-woven fabric at the end of the human hair and less into the non-woven fabric of flour,
There was a lot of falling off while hanging vertically for one minute. The wiper had a lump of fibers, and when used as a wiper, it was determined that the wiper was unusable because the lump would damage the surface of furniture or the like. The texture was rough and poor.

[0042]

According to the wiper of the present invention, the short fibers are randomly oriented, and the bulky and porous nonwoven fabric has irregularities, so that the dust to be wiped out enters not only the surface of the nonwoven fabric but also the inside thereof. Catch in a state. Also, it is surely captured in the concave portion of the nonwoven fabric. Therefore, even if the wiper after the wiping is handled in a random manner, or hung on a bar or the like to be stored and stored, no dust will fall off. For example, when the garbage is relatively long, its end bites into the non-woven fabric and catches it. The same applies to the case where the dust is granular or powdery. In addition, the wiper of the present invention is reinforced with a large fineness fiber net, and since the nonwoven fabric is heat-sealed, there is no fuzz even when used for a long time,
Power is also great.

Claims (8)

[Claims] 1. A heat-fusible short fiber having a fineness of a single yarn of 0.6 to 50 denier and a fiber length of 3 to 25 mm is at least 30% by weight.
Short fiber non-woven fabric containing and 100-2000 denier
A multi-layer wiper in which nets made of heat-fusible fine fibers are laminated, wherein the short fiber nonwoven fabric is formed by fusing the intersections of the heat-fusible short fibers and forming the intersections. The crossing angle distribution occupies 50% or more of the total crossing points at a crossing angle of 60 to 90 degrees, and the apparent specific volume of the short fiber nonwoven fabric is 40 to 250 cm.
³ / g, and the short-fiber nonwoven fabric and the net are integrated, and the short-fiber nonwoven fabric forms irregularities having a height difference of at least 0.2 mm between the convex portion and the concave portion along the eyes of the net, and 1000gf / 5c vertical or horizontal strength
m or more. 2. The wiper according to claim 1, wherein a short fiber nonwoven fabric having a fiber mass having a width of 2 mm or more and 20 fibers / m ² or less and a net made of heat-fusible large fineness fibers are fused. 3. The heat-fusible staple fiber is a composite fiber composed of two or more thermoplastic resins having a difference in melting point of 15 ° C. or more, and the low-melting thermoplastic resin forms at least a part of the fiber surface. 3. The wiper according to claim 1, wherein the wiper is an adhesive conjugate fiber. 4. A net made of a heat-fusible large fineness fiber,
A composite fiber composed of two or more thermoplastic resins having a melting point difference of 15 ° C. or more, and a heat-fusible composite monofilament in which the low-melting thermoplastic resin forms at least a part of the fiber surface, and the monofilament. The wiper according to any one of claims 1 to 3, wherein the intersection is a fused product. 5. A net made of a heat-fusible large fineness fiber,
A heat-fusible composite flat yarn comprising two or more thermoplastic resins having a melting point difference of 15 ° C. or more, and wherein the low-melting thermoplastic resin forms at least a part of the fiber surface. The intersection is a fusion-bonded material.
4. The wiper according to any one of items 1 to 3, 6. The wiper according to claim 1, wherein the heat-fusible short fiber is a fiber using any one of a polyolefin-based thermoplastic resin and a polyester-based thermoplastic resin. 7. A net made of a heat-fusible large fineness fiber,
The wiper according to any one of claims 1 to 6, wherein the fiber is one of a polyolefin-based thermoplastic resin and a polyester-based thermoplastic thermoplastic resin. 8. The short-fiber nonwoven fabric may contain any one or more oils selected from mineral oil, synthetic oil, silicone oil, and surfactant in an amount of 2 to 10 parts by weight based on 100 parts by weight of the short-fiber nonwoven fabric.
The wiper according to any one of claims 1 to 7, wherein the wiper is attached to 0 parts by weight.