WO2020147231A1 - Wipe and manufacturing method therefor - Google Patents

Abstract

Disclosed is a wipe. Upper and lower layers of the wipe are melt-blow fiber webs (13, 14), and an interlayer thereof is a wood pulp fiber web (12), wherein an adhesive is attached to the surfaces of the melt-blow fiber webs (13, 14) and to the interiors thereof that are adjacent to the surfaces, and the melt-blow fiber of the melt-blow fiber webs (13,14) penetrates into the wood pulp fiber web (12). Also disclosed is a manufacturing method for the wipe. Said method may be used for manufacturing a water absorption wipe. Since the adhesive is attached to the interiors and surfaces of the melt-blow fiber webs, the melt-blow fiber webs form a layer of adhesive film. Therefore, when the wipe is used, fluffiness and piling phenomena are prevented, such phenomena being caused by mutual disengagement of cementation between the melt-blow fibers under the action of external force since the surface melt-blow fibers are subject to multiple instances of friction.

Description

Wipe towel and manufacturing method thereof Technical field

The invention relates to the technical field of wipes, and in particular to a wipe with abrasion resistance and anti-fuzzing surface for personal care and infant care and a manufacturing method thereof. The

Background technique

Wipes are often used in daily life, such as when parents change diapers for babies, or when dining in a restaurant, or when putting on make-up and skin care. Because the wipes are quite convenient to carry and store, and are convenient to use, they are popular among consumers. Therefore, wipes are more and more widely used in personal care and infant care.

The wipes can be spunlace non-woven products or spunbonded non-woven products. More traditional cloth wipes have convenient production methods, low prices, and can be used dry or wet. In order to increase the moisture absorption performance of the wipe, wood pulp is often added to the wipe to improve the moisture absorption and decontamination ability of the wipe. However, the wood pulp fibers are natural short fibers. The fibers are short and are not affected by temperature and are not easy to be consolidated together. They are only fixed by spunbonding or spunlace processes. When in use, the wood pulp will be rubbed several times. Short fibers are easy to fall off, causing hair loss, which affects service life.

Summary of the invention

The purpose of the present invention is to provide a wipe and its manufacturing method for preventing surface fluffing and linting, and to overcome the defects of existing products and production methods.

In order to achieve the above objectives, the technical solution of the present invention is:

A wiper, the upper and lower layers of the wiper are meltblown fiber webs, and the middle layer is a wood pulp fiber web, wherein the surface of the meltblown fiber web and the inside of the meltblown fiber web adjacent to the surface are both An adhesive is attached, and the melt-blown fibers of the melt-blown fiber web are interspersed in the wood pulp fiber web.

The melt-blown fiber web contains single-component melt-blown fibers with a high-melting-point resin on the fiber surface, fibers with a low-melting-point resin on the fiber surface, or a blended fiber of both.

The difference between the melting point of the high melting point resin and the low melting point resin is ≥20°C.

The fiber with low melting point resin on the fiber surface is a single-component melt-blown fiber, a two-component melt-blown fiber or a mixture of the two.

The two-component melt-blown fiber is a two-component sheath-core melt-blown fiber, a two-component orange petal-type melt-blown fiber or a two-component side-by-side melt-blown fiber.

The adhesive is hot melt glue or solvent glue.

The weight of the wood pulp fiber web accounts for more than 50% of the total weight of the wipe.

The percentage of the weight of the wood pulp fiber web to the total weight of the wipe is 65% to 80%.

The wood pulp fiber web contains hot melt adhesive material.

The hot-melt adhesive material is low-melting polyester fiber, ES short fiber, two-component spunbond long fiber or a mixture thereof.

A method for manufacturing wipes includes the following steps:

(1) The wood pulp is loosened and dispersed by the opening roller, and the wood pulp fiber web is formed through the nozzle under the action of the auxiliary airflow;

(2) Using the melt-blowing process, the thermoplastic resin is heated and melted, and the melt stream of the thermoplastic resin sprayed from the spinneret is blown into fiber bundles with a fiber diameter of less than 10um by using high temperature and high-speed hot air flow. The airflow forms a meltblown fiber web, and it intersects with the two sides of the wood pulp fiber web to form a multi-layer structure fiber web with a meltblown fiber web on both sides and a wood pulp fiber web in the middle;

(3) Through the glue spraying process, the adhesive is sprayed on both sides of the melt-blown fiber web through the nozzle under the action of high-pressure hot air flow, and the two sides of the multilayer structure fiber web of wood pulp fiber web in the middle;

(4) After spraying, the multi-layer structure fiber web is consolidated by the heating device to form the upper and lower layers of meltblown fiber web, the middle layer is a wipe of wood pulp fiber web, and the meltblown fiber Adhesive is attached to the surface of the mesh and the inside of the meltblown fiber mesh adjacent to the surface.

In the step (2), the two thermoplastic resins whose melting point difference is greater than or equal to 20°C are heated and melted, and the thin stream of the thermoplastic resin melt sprayed from the spinneret is blown into fibers by using high temperature and high-speed hot air flow. Fiber bundles with a diameter of less than 10um are accompanied by hot air flow to form a melt-blown fiber web, wherein the melt-blown fiber web contains fibers with a high melting point resin on the fiber surface, fibers with a low melting point resin on the fiber surface, or a blended fiber of both.

The spinneret contains two-component spinneret holes.

The two-component spinneret holes on the spinneret are of skin-core type, orange petal type or side-by-side type.

The heating device is a hot air oven, a hot roll or a combination of both.

In the step (1), the wood pulp is loosened and dispersed by an opening roller, mixed with the hot-melt adhesive material, and then formed into a wood pulp fiber web containing the hot-melt adhesive material through a nozzle under the action of an auxiliary airflow.

After adopting the above technical solution, the wiper manufacturing method of the invention can be applied to make the wiper of the invention. Because the meltblown fiber web of the wiper of the invention has small fiber denier and densely arranged, it can effectively prevent the wood in the middle layer. The fall of short pulp fibers. In addition, adhesive is attached to the interior and surface of the meltblown fiber web, so that the meltblown fiber web forms a layer of adhesive film, so that the wipes can prevent the surface meltblown fibers from being exposed to external forces due to multiple frictions. The phenomenon of fluffing and fluffing caused by the mutual separation and bonding under the action also further prevents the short fibers of the wood pulp in the middle layer from falling out, and the problem of "fluffing" during use and unclean wiping.

BRIEF DESCRIPTION

Fig. 1 is a schematic diagram of manufacturing a wipe cloth according to embodiment 1 of the present invention;

Figure 2 is a cross-sectional view of the wiping cloth of Example 1 of the present invention;

Fig. 3 is a schematic diagram of manufacturing a wipe cloth according to embodiment 2 of the present invention;

Figure 4 is a cross-sectional view of the wiping cloth of Example 2 of the present invention;

Figure 5A is a cross-sectional view of the sheath-core meltblown fiber of the present invention;

5B is a cross-sectional view of the two-component side-by-side meltblown fiber of the present invention;

Figure 5C is a cross-sectional view of the two-component orange petal type meltblown fiber of the present invention.

【Symbol Description】

[Example 1]

Wood pulp 11 Wood pulp fiber web 12

Meltblown fiber web 13, 14 Multi-layer structure fiber web 15

Wipes 16 Adhesive film 17, 18

Opening roller A1 nozzle B1, D1, D1'

Hot roll F1

[Example 2]

Single-component melt blown fiber with high melting point resin on the fiber surface 20

Melt blown fiber with low melting point resin on the fiber surface 20'

Wood pulp 21 Hot melt adhesive 22

Wood pulp fiber web 23 Melt blown fiber web 24, 25

Multilayer structure fiber mesh 26 Wipes 27

Adhesive film 28, 29

Core-sheath melt blown fiber 31 two-component side-by-side melt blown fiber 32

Two-component orange petal type meltblown fiber 33

Core layer resin 31a Skin layer resin 31b

One of the resins 32b, 33b

Another resin 32a, 33a

Opening roller A2 nozzle B2, D2, D2'

Spinneret C2, C2' hot air oven E2

Hot roll F2.

detailed description

In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

Example 1

As shown in Figure 1, the present invention discloses a method for manufacturing wipes, including the following steps:

(1) The wood pulp 11 is loosened and dispersed by the opening roller A1, and the wood pulp fiber web 12 is formed through the nozzle B1 under the action of the auxiliary airflow.

(2) Using the melt-blowing process, the thermoplastic resin is heated and melted, and the thermoplastic resin melt trickle sprayed from the spinnerets C1 and C1' is blown into fibers with a fiber diameter of ≤10μm using high temperature and high-speed hot air. Bundles, meltblown fiber webs 13, 14 formed with hot air flow, and intersect with the two sides of the wood pulp fiber web 12 to form a meltblown fiber web 13, 14 on both sides, and a wood pulp fiber web 12 in the middle The multi-layer structure fiber web 15, wherein the melt blown fiber webs 13, 14 are composed of single-component melt blown fibers whose fiber surface is a high melting point resin.

(3) Through the glue spraying process, the adhesive is sprayed on both sides through nozzles D1 and D1' under the action of high-pressure hot air flow, which are melt-blown fiber webs 13, 14 and a multilayer structure of wood pulp fiber web 12 in the middle. The two sides of the fiber web 15.

(4) The multi-layer structure fiber web 15 after spraying glue is consolidated by a pair of intermeshing hot rolls F1 to form the upper and lower layers of meltblown fiber webs 13, 14, and the middle layer is wood pulp fiber The wipes 16 of the net 11, and the surfaces of the meltblown fiber nets 13, 14 and the meltblown fiber nets 13, 14 adjacent to the surface are all attached with adhesives. The weight of the wood pulp fiber net 12 is equal to the total weight of the wipes 16. The percentage is 75%.

As shown in FIG. 2, the present invention also discloses a wipe that can be made by the above-mentioned method for manufacturing wipes, which has a layered structure. The upper and lower layers of the wipe 16 are meltblown fiber webs 13 14. The middle layer is a wood pulp fiber web 12, wherein the surface of the meltblown fiber web 13, 14 and the meltblown fiber web 13, 14 adjacent to the surface are all attached with an adhesive, the meltblown fiber web 13 The meltblown fibers of, 14 are inserted into the wood pulp fiber web 12, and the adhesive can be hot melt glue or solvent glue.

Therefore, since the glue spraying process is carried out before the meltblown fiber webs 13, 14 are not consolidated, during the glue spraying process, the adhesive will not only adhere to the surface of the meltblown fiber webs 13, 14 but also penetrate into the surface. Adjacent meltblown fiber webs 13, 14 inside, so that the surface of the meltblown fiber webs 13, 14 and the meltblown fiber webs 13, 14 adjacent to the surface are attached with adhesive, forming a layer on the meltblown fiber webs 13, 14 Adhesive films 17, 18 not only prevent the surface melt-blown fibers from being fluffed and raised due to friction, but also further prevent the wood pulp short fibers in the middle layer from falling out, and the phenomenon of "fluffing" occurs during use. .

Example 2

As shown in Figure 3, the present invention discloses a method for manufacturing wipes, including the following steps:

(1) The wood pulp 21 is loosened and dispersed by the opening roller A2, and mixed with the hot-melt adhesive material 22, and then under the action of the auxiliary air flow, the wood pulp fiber web containing the hot-melt adhesive material 22 is formed through the nozzle B2 twenty three.

(2) Using the melt-blowing process, the two thermoplastic resins are heated separately, then enter the spinning box after melting, and the thermoplastic resin will be sprayed from the spinnerets C2 and C2' in the spinning box using high temperature and high-speed hot air The melt-blown stream is blown into fiber bundles with a fiber diameter of ≤10μm, and the melt-blown fiber webs 24, 25 are formed with hot air flow. The melt-blown fiber webs 24, 25 are composed of single-component melt-blown fibers with high melting point resin on the fiber surface. 20 and the meltblown fiber 20' with low melting point resin on the fiber surface. The melt-blown fiber webs 24 and 25 may also contain only single-component melt-blown fibers 20 with high-melting resin on the fiber surface or only melt-blown fibers 20' with low-melting resin on the fiber surface, and the fiber surface contains low-melting resin. The melt-blown fiber 20' can be a single-component melt-blown fiber, a two-component melt-blown fiber or a mixture of the two. As shown in Figures 5A to 5C, the two-component meltblown fiber may be a sheath-core type meltblown fiber 31, a two-component orange petal type meltblown fiber 33 or a two-component side-by-side type meltblown fiber 32, and the sheath-core type The melting point of the skin layer resin 31b in the meltblown fiber 31 is lower than that of the core layer resin 31a. The melting point of one of the resins 32b and 33b of the two-component orange petal type melt-blown fiber 33 and the two-component side-by-side melt-blown fiber 32 is low. It is the melting point of another resin 32a, 33a. The two-component melt-blown fiber is formed by heating and melting two thermoplastic resins with a difference of ≥20° C. between the melting points, and spraying them from the two-component spinneret holes in the spinneret. The two-component spinneret holes on the plate are skin-core, orange-petal or side-by-side; then the meltblown fiber webs 24, 25 are formed at the two sides of the wood pulp fiber web 23 containing the hot-melt adhesive 22 Intersect to form a multi-layer structure fiber web 26 with meltblown fiber webs 24 and 25 containing two-component meltblown fibers on both sides, and a wood pulp fiber web 23 containing hot melt adhesive 22 in the middle.

(3) Through the spraying process, the adhesive is sprayed on both sides of the meltblown fiber web 24, 25 through nozzles D2 and D2' under the action of high-pressure hot air flow, and the wood containing the hot melt adhesive material 22 in the middle Pulp fiber web 23 has two sides of a multi-layer structure fiber web 26.

(3) The multi-layer structure fiber web 26 after spraying glues the fiber web through a hot air oven E2 and a pair of meshing hot rolls F2 to consolidate the fiber web together to form the upper and lower layers of meltblown fiber webs 24 and 25, the middle layer The wipe 27 is a wood pulp fiber web 23 containing a hot-melt adhesive material 22, and adhesive is attached to the surface of the meltblown fiber web 24, 25 and the inside of the meltblown fiber web 24, 25 adjacent to the surface.

As shown in Figure 4, the present invention also discloses a wipe that can be made by applying the above-mentioned method for manufacturing wipes, which has a layered structure. The upper and lower layers of the wipe 27 are meltblown fiber webs 24. 25, the middle layer is a wood pulp fiber web 23 containing a hot melt adhesive material 22, wherein the surface of the melt blown fiber web 24, 25 and the melt blown fiber web 24, 25 adjacent to the surface are all attached with adhesive The meltblown fibers of the meltblown fiber webs 24, 25 are interspersed in the wood pulp fiber web 23. The meltblown fiber webs 24, 25 consist of a single-component meltblown fiber 20 whose fiber surface is a high melting point resin and the fiber surface contains low Melt-blown fiber 20' blending composition of melting resin. The meltblown fiber 20' containing low-melting resin on the fiber surface can be a single-component melt-blown fiber, a two-component melt-blown fiber or a mixture of the two. The hot-melt adhesive 22 is a low-melting polyester fiber, ES Short fiber, two-component spun-bonded long fiber or their mixture, and their mixture is formed by mixing low-melting polyester fiber, ES short fiber, two-component spun-bonded long fiber together or optionally a mixture of two.

Therefore, since the glue spraying process is performed before the meltblown fiber webs 24 and 25 are not consolidated, the adhesive will not only adhere to the surface of the meltblown fiber webs 24, 25, but also penetrate into the surface during the glue spraying process. Adjacent meltblown fiber webs 24, 25 inside, so that the surface of the meltblown fiber webs 24, 25 and the meltblown fiber webs 24, 25 adjacent to the surface are attached with adhesive, forming a layer on the meltblown fiber webs 24, 25 The adhesive films 28 and 29 not only prevent the surface melt-blown fibers from being fluffed and raised due to friction, but also further prevent the short fibers of the wood pulp in the middle layer from falling out and appearing'fluffing' during use. In addition, the melt-blown fiber webs 24 and 25 contain melt-blown fibers 20' with low-melting resin on the fiber surface. The low-melting resin in the melt-blown fibers 20' is melted in a hot-air oven, so that the fibers will stick together, which increases The overall strength of the wipes also makes the melt-blown fiber arrangement more dense, and makes the adhesives attached to the surface of the melt-blown fiber webs 24 and 25 stronger. At the same time, a hot-melt adhesive material 22 is added to the wood pulp fiber web 23 of the middle layer. The surface of the hot-melt adhesive material 22 starts to melt in the hot-air oven to fix the wood pulp short fibers of the middle layer to a certain extent, so that the wood The short fibers are difficult to move, so as to further prevent the formed wipes from shedding during use, and increase the abrasion resistance of the wipes.

Claims (16)

1. A wiper, characterized in that the upper and lower layers of the wiper are meltblown fiber webs, and the middle layer is a wood pulp fiber web, wherein the surface of the meltblown fiber web and the meltblown fiber web adjacent to the surface Adhesives are attached to the inside of the fiber web, and the melt-blown fibers of the melt-blown fiber web are inserted into the wood pulp fiber web.
2. The wipe of claim 1, wherein the melt-blown fiber web contains single-component melt-blown fibers with high melting point resin on the fiber surface, fibers with low melting point resin on the fiber surface, or a blend of both fiber.
3. The wipe of claim 2, wherein the difference between the melting point of the high melting point resin and the low melting point resin is ≥ 20°C.
4. The wiper according to claim 2, characterized in that the fiber containing low-melting resin on the fiber surface is a single-component melt-blown fiber, a two-component melt-blown fiber or a mixture of both.
5. The wipe of claim 4, wherein the two-component meltblown fiber is a two-component sheath-core meltblown fiber, a two-component orange petal type meltblown fiber or a two-component side-by-side meltblown fiber. Spray fiber.
6. The wiper according to claim 1, wherein the adhesive is hot melt glue or solvent glue.
7. 8. The wipe of claim 1, wherein the weight of the wood pulp fiber web accounts for more than 50% of the total weight of the wipe.
8. 8. The wipe of claim 1, wherein the weight of the wood pulp fiber web is 65% to 80% of the total weight of the wipe.
9. The wipe of claim 1, wherein the wood pulp fiber web contains hot-melt adhesive material.
10. The wipe of claim 9, wherein the hot-melt adhesive material is low-melting polyester fiber, ES short fiber, two-component spunbond long fiber or a mixture thereof.
11. A method for manufacturing a wipe as claimed in claim 1, characterized in that it comprises the following steps:

    (1) The wood pulp is loosened and dispersed by the opening roller, and the wood pulp fiber web is formed through the nozzle under the action of the auxiliary airflow;

    (2) Using the melt-blowing process, the thermoplastic resin is heated and melted, and the melt stream of the thermoplastic resin sprayed from the spinneret is blown into fiber bundles with a fiber diameter of less than 10um by using high temperature and high-speed hot air flow. The airflow forms a meltblown fiber web, and it intersects with the two sides of the wood pulp fiber web to form a multi-layer structure fiber web with meltblown fiber webs on both sides and wood pulp fiber web in the middle;

    (3) Through the glue spraying process, the adhesive is sprayed on both sides of the melt blown fiber web through a nozzle under the action of high pressure hot air flow, and the two sides of the multi-layer structure fiber web of wood pulp fiber web in the middle;

    (4) After spraying, the multi-layer structure fiber web is consolidated by the heating device to form the upper and lower layers of meltblown fiber web, the middle layer is a wipe of wood pulp fiber web, and the meltblown fiber Adhesive is attached to the surface of the mesh and the inside of the meltblown fiber mesh adjacent to the surface.
12. A method for manufacturing wipes according to claim 11, characterized in that: in the step (2), two thermoplastic resins with a melting point difference of ≥20°C are heated and melted, and the high temperature, high-speed hot air is used to The melt-blown stream of thermoplastic resin sprayed from the spinneret is blown into fiber bundles with a fiber diameter of less than 10um, and a melt-blown fiber web is formed with hot air flow, wherein the melt-blown fiber web contains fibers with a high melting point resin on the fiber surface , The fiber surface contains low-melting resin fiber or a blend of both fibers.
13. The method for manufacturing wear-resistant wipes according to claim 11, wherein the spinneret contains two-component spinneret holes.
14. The method for manufacturing wear-resistant wipes according to claim 13, wherein the two-component spinneret holes on the spinneret are of skin-core type, orange petal type or side-by-side type.
15. The method for manufacturing wear-resistant wipes according to claim 11, wherein the heating device is a hot air oven, a hot roll or a combination of both.
16. A method for manufacturing wipes according to claim 11, characterized in that: in the step (1), the wood pulp is loosened and dispersed by the opening roller, and mixed with the hot-melt adhesive material in the auxiliary air flow Under the action, a wood pulp fiber web containing hot-melt adhesive material is formed through a nozzle.