Moisture-absorbing, sweat-releasing, waterproof and moisture-permeable mesh knitted fabric composite coating fabric as well as manufacturing method and application thereof

Abstract

The invention provides a moisture-absorbing, sweat-releasing, waterproof and moisture-permeable mesh knitted fabric composite coating fabric as well as a manufacturing method and application thereof. The moisture-absorbing, sweat-releasing, waterproof and moisture-permeable mesh knitted fabric composite coating fabric is a three-layer mesh knitted fabric which is woven by taking wool / hemp viscose / vinylon hollow yarns and the like as raw materials and is coated with a layer of waterproof and moisture-permeable polyurethane film. Belongs to the technical field of functional textile processing and manufacturing methods. The three-layer gradient mesh composite coating knitted fabric is manufactured by adopting the wool / China-hemp viscose / vinylon hollow yarn through a fabric structure design and transfer coating process, has moisture absorption and sweat releasing performance and waterproof and moisture permeable performance, and can be used as a fabric of underwear, leisure, outdoor sports, winter warm-keeping clothes and the like.

Description

Technical Field

[0001] The invention relates to a method for manufacturing a one-way moisture-conducting mesh knitted fabric composite fabric, and in particular to a moisture-absorbing and perspiration-wicking, waterproof and breathable mesh knitted fabric composite coating fabric, a manufacturing method and an application thereof. Background Art

[0002] When the human body wears clothing, the gaseous and liquid moisture discharged from the skin is generally dissipated through the fabric through three pathways: moisture permeability, moisture absorption, and moisture release. The gaseous moisture that evaporates insensibly is dissipated through the gaps between fibers and between yarns due to the water vapor pressure difference inside and outside the clothing fabric, which is called fabric moisture permeability; gaseous moisture can also be adsorbed on the fiber surface or inside the fiber, which is called fabric moisture absorption; the performance of the fabric in absorbing liquid water is the fabric water absorption; the fiber releases moisture to the external environment after absorbing moisture, which is called moisture release. The performance that measures the fabric's ability to pass through and absorb water vapor is called moisture permeability and moisture absorption, respectively. The moisture permeability of the fabric greatly affects the comfort experience of people when wearing it, and the moisture permeability of the fabric can be improved by the moisture absorption properties of the fiber raw materials, fabric structure, thickness, tightness, porosity, etc.

[0003] At present, there are four design schemes for moisture wicking fabrics at home and abroad: developing special-shaped cross-section fibers, preparing blended yarns of moisture-absorbing fibers and ordinary fibers, designing asymmetric double-layer fabrics, and performing moisture-absorbing and quick-drying finishing on fabrics. The first two methods only improve the moisture wicking effect of fabrics from the fiber and yarn structure, and the latter two methods only change the fabric performance from the fabric structure and morphology, which is still far from the actual requirements and expectations of people for moisture wicking, waterproof and breathable, soft and comfortable performance of clothing fabrics.

[0004] Therefore, there is an urgent need for a mesh knitted fabric composite coating fabric that is moisture absorbing and perspiration wicking, waterproof and breathable, a manufacturing method and an application thereof. Summary of the invention

[0005] The purpose of the present invention is to provide a moisture absorbing and perspiration wicking, waterproof and breathable mesh knitted fabric composite coating fabric, a manufacturing method and its use, which can not only quickly absorb sweat produced by the human body and discharge it to the outside, but also has a certain waterproof and breathable effect.

[0006] The first aspect of the present invention provides a method for preparing a moisture wicking, waterproof and breathable mesh knitted fabric composite coating fabric, comprising the following steps:

[0007] Step 1, using hemp stalk core as raw material to sequentially prepare hemp pulp and hemp viscose spinning solution, and then spinning to obtain hemp viscose fiber with special cross-section;

[0008] Step 2, mixing the special-section hemp viscose fiber described in step 1 with wool as the covering yarn and water-soluble vinylon as the core yarn, preparing wool / hemp viscose / vinylon composite yarn by the Cellofil spinning method, and further subjecting it to water-soluble finishing to obtain wool / hemp viscose / vinylon hollow yarn;

[0009] Step 3, mixing the wool / hemp viscose / vinylon hollow yarn with ordinary wool yarn, and preparing a three-layer mesh composite knitted fabric with a mesh structure;

[0010] Step 4: using a coating process, coating the outermost layer of the three-layer composite knitted fabric with a layer of polyurethane film to obtain a mesh knitted fabric composite fabric with moisture absorption and perspiration removal, waterproof and breathable properties.

[0011] Preferably, the hemp pulp in step 1 is obtained by separating the husk and stalk of hemp, cutting, pre-wetting with screen spraying water, pre-hydrolyzing, steaming, beating, bleaching, filtering, extruding and drying.

[0012] Preferably, the hemp viscose spinning solution in step 1 is obtained by impregnating, aging, sulfonating, dissolving, maturing and degassing hemp pulp.

[0013] Preferably, the special-section hemp viscose fiber in step 1 is obtained by extruding the hemp viscose spinning solution through a spinneret, and sequentially undergoing acid neutralization, drawing, coagulation, water washing, desulfurization, bleaching, pickling, oiling, and drying.

[0014] Preferably, in step 3, the mesh structure includes a beaded mesh structure, a double beaded mesh structure, a perforated structure, and a punched structure.

[0015] Preferably, in the step 3, the three-layer mesh composite knitted fabric is formed by selecting and matching different knitted fabric structures, including a tuck structure, a saros structure, a pineapple structure, and a floating yarn structure, so that the fabric has a large mesh (mesh diameter not less than 1 mm) on the side close to the skin, a medium mesh (mesh diameter between 0.5 and 1 mm), and a small mesh (mesh diameter less than 0.5 mm) on the outer layer.

[0016] Preferably, in step 4, the polyurethane film comprises component A and component B; wherein component A is prepared by the following method: polyethylene glycol, polytetrahydrofuran diol, a small molecule chain extender and a leveling agent are mixed in mass parts of 70, 30, 2 and 3 respectively, and stirred evenly at a speed of 800 r / min; component B is prepared by the following method: 20 parts of polyethylene glycol and 24 parts of polypropylene glycol are added to a reaction bottle, dehydrated at 90° C. with nitrogen for 1 hour, and after analyzing that the moisture content is less than 0.05%, 56 parts of 4,4'-diphenylmethane diisocyanate are added, and the mixture is uniformly reacted at 75-80° C. and a stirring speed of 300 r / min for 3 hours.

[0017] Preferably, in the step 4, the coating process adopts a transfer coating method, the prepared component A is coated on the release paper and dried, and then the component B is coated as a primer, and the knitted fabric is laid on the base coating, the fabric and the coating are combined by a roller, and then the whole is dried and the release paper is peeled off to obtain a mesh knitted fabric composite fabric with moisture absorption and perspiration, waterproof and breathable.

[0018] The second aspect of the present invention provides a moisture wicking, waterproof and breathable mesh knitted fabric composite coating fabric, which has the characteristics of moisture wicking, waterproof and breathable, fluffy and soft.

[0019] The third aspect of the present invention provides the use of a mesh knitted composite coated fabric that is moisture absorbing and perspiration wicking, waterproof and breathable, characterized in that it is used as a fabric for underwear, outdoor sportswear, and winter warm clothing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) The wool / hemp viscose / vinylon hollow yarn used has grooves between fibers and the internal cavity structure of the fibers, which makes the fibers produce capillary effect, enhancing the wetting and wicking effect of the fabric. Moreover, the yarn is soft and fluffy, and can quickly absorb sweat from human skin, keeping the skin dry and comfortable;

[0022] 2) The mesh knitted composite fabric formed has a capillary effect due to the difference in mesh diameter between the fabrics, which can transport sweat from the inside to the outside and into the air, further improving the moisture absorption and breathability of the fabric;

[0023] 3) The polyurethane coating on the surface of the mesh knitted composite fabric has a waterproof and breathable effect, and can maintain the structural stability and waterproofness of the fabric;

[0024] 4) The present invention adopts a combination of fibers with good hygroscopicity, fibers with different cross-sections, and hollow structure yarns, which can effectively improve the wetting and wicking properties of the fabric. Utilizing the principle of differential capillary effect, the fibers with different cross-sections and hollow fibers have many grooves and through pores on the fiber surface and inside, respectively, which increases the fiber surface area, effectively improves the wetting and wicking process of the fabric, and continuously flows the sweat discharged from the human body from the fiber micropores to the middle cavity and conducts it outward. In addition, the present invention adopts a multi-layer mesh knitted fabric composite fabric with hygroscopic and perspiration-wicking properties, and by designing a multi-layer mesh structure fabric, the pore size between the fibers of the inner layer fabric is larger than the pore size between the fibers of the outer layer fabric, and the different void densities of the inner and outer fabrics produce a pressure difference, which further enhances the capillary effect, increases the porosity of the fabric, and accelerates the discharge and evaporation of the liquid outward. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the moisture absorption and perspiration removal principle of the mesh knitted fabric composite fabric of the present invention;

[0026] Figure 2 It is a schematic diagram of the formation of wool / hemp viscose / vinylon hollow yarn of the present invention; DETAILED DESCRIPTION

[0027] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with specific embodiments, but the content of the present invention is not limited to the following embodiments.

[0028] like Figure 1 As shown in the figure, the sweat produced by human skin first contacts with the inner surface fibers of the clothing. Since the multi-layer mesh knitted composite fabric has a large mesh on the inner layer close to the skin, a medium mesh on the inner layer, and a small mesh on the outer layer, the capillary diameter in the fabric gradually decreases from the inside to the outside, producing a capillary effect, which completely separates the sweat from the human skin and transfers it to the fabric, and gradually releases it to the outside. Figure 2 As shown, part of the raw materials used for the mesh knitted fabric composite fabric is wool / hemp viscose / vinylon hollow yarn, which is obtained by mixing wool roving and hemp viscose fiber in a certain proportion and using the mixture as covering yarn, and water-soluble vinylon as core yarn. The water-soluble vinylon is compounded in wool roving and hemp viscose fiber by the Cellofil spinning method, and then subjected to water-soluble finishing.

[0029]

Claims

1. A method for preparing a moisture wicking, waterproof and breathable mesh knitted fabric composite coating fabric, characterized in that: The following steps are involved: Step 1, using hemp stalk core as raw material to sequentially prepare hemp pulp and hemp viscose spinning solution, and then spinning to obtain hemp viscose fiber with a special cross-section; Step 2, mixing the special-section hemp viscose fiber described in step 1 with wool as the covering yarn and water-soluble vinylon as the core yarn, preparing wool / hemp viscose / vinylon composite yarn by the Cellofil spinning method, and further subjecting it to water-soluble finishing to obtain wool / hemp viscose / vinylon hollow yarn; Step 3, mixing the wool / hemp viscose / vinylon hollow yarn with ordinary wool yarn, and preparing a three-layer mesh composite knitted fabric with a mesh structure; Step 4: using a coating process, coating the outermost layer of the three-layer mesh composite knitted fabric with a layer of polyurethane film to obtain a mesh knitted fabric composite coating fabric with moisture absorption and perspiration removal, waterproof and breathable properties.

2. The method for preparing the moisture wicking, waterproof and breathable mesh knitted fabric composite coating fabric according to claim 1, characterized in that: The hemp pulp in step 1 is obtained by separating the husk and stalk of hemp, cutting, pre-wetting with screen spraying water, pre-hydrolyzing, steaming, beating, bleaching, filtering, squeezing and drying.

3. The method for preparing the moisture wicking, waterproof and breathable mesh knitted fabric composite coating fabric according to claim 1, characterized in that: The hemp viscose spinning solution in step 1 is obtained by impregnating, aging, sulfonating, dissolving, maturing and degassing hemp pulp.

4. The method for preparing the moisture wicking, waterproof and breathable mesh knitted composite coated fabric according to claim 1, characterized in that: The special-section hemp viscose fiber in step 1 is obtained by extruding the hemp viscose spinning solution through a spinneret, and then sequentially undergoing acid neutralization, drawing, coagulation, water washing, desulfurization, bleaching, acid washing, oiling, and drying.

5. The method for preparing the moisture wicking, waterproof and breathable mesh knitted composite coated fabric according to claim 1, characterized in that: In the step 3, the mesh structure includes a beaded mesh structure, a double beaded mesh structure, a perforated structure, and a patterned structure.

6. The method for preparing the moisture wicking, waterproof and breathable mesh knitted composite coating fabric according to claim 1, characterized in that: In the step 3, the three-layer mesh composite knitted fabric is knitted by selecting and matching a tucked loop structure, a saros structure, a pineapple structure or a floating yarn structure, so that the fabric has the following structural characteristics: the side close to the skin is a large mesh with a mesh diameter of not less than 1 mm; the middle layer is a medium mesh with a mesh diameter of between 0.5 and 1 mm; and the outer layer is a small mesh with a mesh diameter of less than 0.5 mm.

7. The method for preparing the moisture wicking, waterproof and breathable mesh knitted composite coating fabric according to claim 1, characterized in that: In the step 4, the polyurethane film includes component A and component B; wherein component A is prepared by the following method: polyethylene glycol, polytetrahydrofuran diol, a small molecule chain extender and a leveling agent are mixed in mass parts of 70, 30, 2 and 3 respectively, and stirred evenly at a speed of 800 r / min; component B is prepared by the following method: 20 parts of polyethylene glycol and 24 parts of polypropylene glycol are added to a reaction bottle, dehydrated with nitrogen at 90° C. for 1 hour, and after analyzing that the water content is less than 0.05%, 56 parts of 4,4'-diphenylmethane diisocyanate are added, and the mixture is uniformly reacted at 75-80° C. and a stirring speed of 300 r / min for 3 hours.

8. The method for preparing the moisture wicking, waterproof and breathable mesh knitted composite coating fabric according to claim 7, characterized in that: In the step 4, the coating process adopts the transfer coating method, the prepared component A is coated on the release paper and dried, and then the component B is coated as a primer, and the knitted fabric is laid on the base coating, the fabric and the coating are combined by a roller, and then the whole is dried and the release paper is peeled off to obtain a mesh knitted fabric composite fabric with moisture absorption and perspiration, waterproof and breathable.

9. A moisture wicking, waterproof and breathable mesh knitted composite coated fabric according to any one of claims 1 to 8.

10. An application of the moisture wicking, waterproof and breathable mesh knitted composite coating fabric according to claim 9, characterized in that: Used as underwear, outdoor sportswear, and winter warm clothing fabrics.

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