Fabric printed on PU microporous film and preparation method thereof

Abstract

The invention discloses a fabric printed on a PU microporous membrane, which comprises, from bottom to top, a base fabric layer, an adhesive layer, a PU microporous membrane layer, and a printing layer. The fabric printed on the PU microporous membrane of the invention has good water repellency by optimizing the types of raw materials of the polyurethane adhesive layer and the PU microporous membrane layer, so that the fabric will not swell and bulge when worn on rainy days, and the PU microporous membrane is combined with the printing to make the fabric have good air permeability and moisture permeability. The printing on the fabric can make the fabric dry and comfortable, has the effects of moisture absorption, quick drying, antibacterial and deodorizing, and will not affect the water repellency of the fabric after printing, and can still resist high static water pressure.

Description

Technical Field

[0001] The invention relates to a fabric printed on a PU microporous film, in particular to D06P, and in particular to dyeing or printing of textiles. Background Art

[0002] As people pay more and more attention to their health, more and more people go to nature to do outdoor sports, which has triggered the rise of a large number of outdoor sports fabrics. Outdoor sports fabrics not only need good waterproof performance, but also the moisture absorption and quick-drying performance of the fabric has become the research focus of outdoor sports fabrics in order to dissipate the sweat generated during exercise in time.

[0003] Chinese invention patent CN201710380873.3 discloses a waterproof and breathable coating fabric that achieves high breathability by introducing a PTFE-TPU composite coating, but two layers of coating need to be applied during the preparation process, which is relatively cumbersome, and the water repellency will decrease after multiple exposure to water. Chinese invention patent CN201410497358.X discloses a waterproof and warm-keeping fabric that achieves waterproof and heat-insulating effects by introducing a polyvinylidene fluoride spray film, but the introduction of polyvinylidene fluoride has certain pollution to the environment and is more harmful during the processing process. Summary of the invention

[0004] In order to improve the waterproofness of the fabric and make the fabric have the function of moisture absorption and quick drying, the first aspect of the present invention provides a fabric printed on a PU microporous membrane, which includes a base fabric layer, an adhesive layer, a PU microporous membrane layer, and a printing layer from bottom to top.

[0005] As a preferred embodiment, the material of the base fabric layer is selected from one of nylon fiber, polyester fiber, polyvinyl alcohol fiber, acrylic fiber, polypropylene fiber, and blended fiber.

[0006] As a preferred embodiment, the warp yarn specification of the base fabric is 30-45D / 40-50F, and the weft yarn specification is 30-45D / 40-50F.

[0007] As a preferred embodiment, the warp yarn specification of the base fabric is 40D / 40F, and the weft yarn specification is 40D / 40F.

[0008] The applicant found that the fabric prepared by using 40D / 40F warp yarn and 40D / 40F weft yarn has a soft feel, and has good bonding strength with the adhesive layer, and will not swell and bubble when exposed to water.

[0009] As a preferred embodiment, the warp density of the base fabric is 130-150 strands / cm 2, weft density is 100-115 strands / cm 2 .

[0010] As a preferred embodiment, the warp density of the base fabric is 140 strands / cm 2 , weft density is 109 threads / cm 2 .

[0011] The applicant found that during the weaving process, the warp density of the designed base fabric was 140 strands / cm 2 , weft density is 109 threads / cm 2 It can make the fabric have better water-repellent effect without affecting the breathability of the fabric, and is especially suitable for use as outdoor sports fabrics.

[0012] As a preferred embodiment, the weave of the base fabric is selected from plain weave, twill weave, satin weave or a combination of two thereof.

[0013] As a preferred embodiment, the base fabric is woven in a plain weave.

[0014] As a preferred embodiment, the adhesive layer is selected from one or a combination of polyurethane resin, polyacrylic acid resin, polyglyoxal, and urea-formaldehyde resin.

[0015] As a preferred implementation, the adhesive layer is polyurethane resin.

[0016] As a preferred embodiment, the polyurethane resin is a combination of anionic waterborne polyurethane resin and nonionic waterborne polyurethane resin.

[0017] During the experiment, the applicant found that when a nylon yarn fabric with a specification of 40D / 40F was coated with water-based polyurethane adhesive, the viscosity of the polyurethane adhesive was 50-500mPa.s, and the solid content was 30-60%, the adhesion to the PU film was good, and there would be no bulging phenomenon when encountering water after bonding. It has good water repellency and can resist high static water pressure. The possible reasons are speculated to be: the water-based polyurethane adhesive is a compound of non-ionic water-based polyurethane adhesive and anionic water-based polyurethane adhesive, which can form a higher charge density on the surface of the nylon base fabric, which is conducive to hydrogen bonding with the surface of the nylon fiber, and improves the adhesion of the water-based polyurethane adhesive to the nylon base fabric. The surface of the PU film has micropores with uniform density, and the PU film has good affinity with the water-based polyurethane adhesive. After compounding, the PU film and the nylon base fabric can be firmly bonded, and the surface of the PU film has multiple micropores. After combining with the water-based polyurethane adhesive with a solid content of 30-60%, the pores can still be kept unobstructed, thereby achieving good air permeability of the base fabric. In addition, the bonding force between the nylon base fabric and the water-based polyurethane adhesive is relatively strong, and water will not penetrate into the adhesive layer under strong water pressure, and the problem of water seepage and bulging will not occur.

[0018] As a preferred embodiment, the weight ratio of the anionic waterborne polyurethane resin to the nonionic waterborne polyurethane resin is 1:(2-3).

[0019] The applicant found during the experiment that when the weight ratio of anionic waterborne polyurethane resin to nonionic waterborne polyurethane resin is 1:(2-3), the waterborne polyurethane resin combination has a good synergistic effect, can improve the water repellency of the adhesive layer, and greatly improve the adhesion.

[0020] As a preferred embodiment, the polyurethane resin has a viscosity of 50-500 mPa.s at 25° C. and a solid content of 30-60%.

[0021] As a preferred embodiment, the PU membrane pore size of the PU microporous membrane layer is 100-300 μm.

[0022] The applicant found during the experiment that a PU microporous membrane with a pore size of 100-300 μm is preferred, which can make the print have a strong adhesion on the PU membrane and will not affect the air permeability of the fabric.

[0023] As a preferred embodiment, the raw material for preparing the slurry of the printing layer is selected from one of coffee carbon, coconut shell charcoal, ceramic powder, bamboo charcoal and graphene.

[0024] During the experiment, the applicant found that adding one of coffee carbon, coconut shell charcoal, ceramic powder, bamboo charcoal, and graphene to the printing paste of the printing layer can make the printing have the effect of moisture absorption and quick drying, which can effectively ensure the dryness and comfort of the fabric, and also has the effect of sterilization and deodorization.

[0025] A second aspect of the present invention provides a method for preparing a fabric printed on a PU microporous membrane, comprising the following steps:

[0026] (1) Combining the printed layer with the PU microporous membrane layer: Printing the slurry of the printed layer onto the PU microporous membrane using a screen printing process, drying and shaping at 140-160° C., with a printing speed of 18-22 m / min;

[0027] (2) making base fabric;

[0028] (3) coating an adhesive layer on the base fabric, bonding the other side of the PU microporous membrane obtained in step 1 to the adhesive layer at a bonding speed of 13-18 m / s, and drying at 25-30° C. to obtain the product.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The fabric printed on the PU microporous membrane of the present invention has good water repellency by optimizing the types of raw materials for the polyurethane adhesive layer and the PU microporous membrane layer, so that the fabric will not swell when worn on rainy days.

[0031] (2) The fabric printed on the PU microporous membrane of the present invention has good air permeability and moisture permeability by optimizing the types of raw materials for the PU microporous membrane layer and the printing layer. The printing on the fabric can make the fabric dry and comfortable, and has the effects of moisture absorption, quick drying, antibacterial and deodorizing.

[0032] (3) The fabric printed on the PU microporous membrane of the present invention does not affect the water repellency of the fabric after printing, and can still resist high static water pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the flower pattern printed on the PU microporous membrane according to the present invention. DETAILED DESCRIPTION

[0034] The present invention is described in detail below by way of examples. It is necessary to point out here that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by professionals and technicians in this field based on the content of the present invention above still belong to the scope of protection of the present invention.

[0035] In addition, unless otherwise stated, all raw materials used were commercially available.

[0036] Example 1

[0037] A fabric printed on a PU microporous film comprises, from bottom to top, a base fabric layer, an adhesive layer, a PU microporous film layer, and a printing layer.

[0038] The base fabric layer is made of nylon fiber; the warp yarn specification is 40D / 40F, the weft yarn specification is 40 / 40F; the warp density of the base fabric is 140 strands / cm 2 , weft density is 109 threads / cm 2 ; The base fabric is plain weave.

[0039] The adhesive layer is a combination of anionic water-based polyurethane resin and non-ionic water-based polyurethane resin in a weight ratio of 1:2. The anionic water-based polyurethane resin has a viscosity of 300 mPa.s at 25°C and a solid content of 33%. It was purchased from Shanghai Belt New Material Technology Co., Ltd. under the model number PU7307. The non-ionic water-based polyurethane resin has a viscosity of 200 mPa.s at 25°C and a solid content of 60%. It was purchased from Shanghai Belt New Material Technology Co., Ltd. under the model number PU7108.

[0040] The PU membrane pore size of the PU microporous membrane layer is 200 μm, and it is purchased from Jiangsu Hongyu High-tech Composite Fabric (Suzhou) Co., Ltd.

[0041] The printing paste of the printing layer contains coconut shell charcoal, and the printing paste is purchased from Jiangsu Hongyu High-tech Composite Fabric (Suzhou) Co., Ltd.

[0042] A method for preparing a fabric printed on a PU microporous membrane comprises the following steps:

[0043] (1) Combining the printed layer with the PU microporous membrane layer: Printing the slurry of the printed layer onto the PU microporous membrane using a screen printing process, drying and setting at 150° C., with a printing speed of 20 m / min;

[0044] (2) making base fabric;

[0045] (3) Coating an adhesive layer on the base fabric, bonding the other side of the PU microporous membrane obtained in step 1 to the adhesive layer at a bonding speed of 15 m / s, and drying at 27° C. to obtain the result.

[0046] Example 2

[0047] A fabric printed on a PU microporous film comprises, from bottom to top, a base fabric layer, an adhesive layer, a PU microporous film layer, and a printing layer.

[0048] The base fabric layer is made of nylon fiber; the warp yarn specification is 40D / 40F, the weft yarn specification is 40 / 40F; the warp density of the base fabric is 140 strands / cm 2 , weft density is 109 threads / cm 2 ; The base fabric is plain weave.

[0049] The adhesive layer is a combination of anionic water-based polyurethane resin and non-ionic water-based polyurethane resin with a weight ratio of 1:2.5. The anionic water-based polyurethane resin has a viscosity of 150 mPa.s at 25°C and a solid content of 34%. It was purchased from Shanghai Belt New Material Technology Co., Ltd. with model number PU7307. The non-ionic water-based polyurethane resin has a viscosity of 400 mPa.s at 25°C and a solid content of 58%. It was purchased from Shanghai Belt New Material Technology Co., Ltd. with model number PU7108.

[0050] The PU membrane pore size of the PU microporous membrane layer is 150 μm, and it is purchased from Jiangsu Hongyu High-tech Composite Fabric (Suzhou) Co., Ltd.

[0051] The printing paste of the printing layer contains ceramic powder, and the printing paste is purchased from Jiangsu Hongyu High-tech Composite Fabric (Suzhou) Co., Ltd.

[0052] A method for preparing a fabric printed on a PU microporous membrane comprises the following steps:

[0053] (1) Combining the printed layer with the PU microporous membrane layer: Printing the slurry of the printed layer onto the PU microporous membrane using a screen printing process, drying and setting at 145° C., with a printing speed of 18 m / min;

[0054] (2) making base fabric;

[0055] (3) Coating an adhesive layer on the base fabric, bonding the other side of the PU microporous membrane obtained in step 1 to the adhesive layer at a bonding speed of 15 m / s, and drying at 25° C. to obtain the result.

[0056] Example 3

[0057] A fabric printed on a PU microporous membrane and a preparation method thereof, wherein the specific steps are the same as those in Example 1, except that the adhesive layer is an anionic water-based polyurethane resin.

[0058] Example 4

[0059] A fabric printed on a PU microporous membrane and a preparation method thereof, wherein the specific steps are the same as those in Example 1, except that the weight ratio of the anionic waterborne polyurethane resin to the nonionic waterborne polyurethane resin in the adhesive layer is 2:1.

[0060] Example 5

[0061] A fabric printed on a PU microporous membrane and a preparation method thereof, wherein the specific steps are the same as those in Example 1, except that the warp density of the base fabric is 130 strands / cm 2 , weft density is 120 strands / cm 2 .

[0062] Performance Testing

[0063] 1. Fabric water repellency test: According to the AATCC 22-2018E2019 spray method standard, the water repellency of the prepared fabric and the water repellency after spraying 10 times are tested.

[0064] 2. Water pressure test: According to JIS L1092:2009 method B standard, the static water pressure resistance of the prepared fabric is tested.

[0065] 3. Moisture permeability test: According to JIS L1099:2012B standard, the moisture permeability of the prepared fabric was tested. Examples 1-5 were tested according to the above standard, and the results are shown in Table 1.

[0066] Table 1

[0067]

Claims

1. A fabric printed on a PU microporous membrane, characterized in that: From bottom to top, it includes base fabric layer, adhesive layer, PU microporous film layer, and printing layer; The warp yarn specification of the base fabric is 30-45D / 40-50F, and the weft yarn specification is 30-45D / 40-50F; The warp density of the base fabric is 130-150 yarns / cm 2 , weft density is 100-115 strands / cm 2 ; The adhesive layer is a combination of anionic waterborne polyurethane resin and nonionic waterborne polyurethane resin, with a weight ratio of 1:(2-3); the polyurethane resin has a viscosity of 50-500 mPa.s at 25°C and a solid content of 30-60%; The PU membrane pore size of the PU microporous membrane layer is 100-300 μm.

2. The fabric printed on the PU microporous membrane according to claim 1, characterized in that: The material of the base fabric layer is selected from one of nylon fiber, polyester fiber, polyvinyl alcohol fiber, acrylic fiber, polypropylene fiber and blended fiber.

3. The fabric printed on the PU microporous membrane according to claim 1, characterized in that: The weaving mode of the base fabric is selected from one of plain weave, twill weave and satin weave or a combination of two of them.

4. The fabric printed on the PU microporous membrane according to claim 1, characterized in that: The raw material for preparing the slurry of the printing layer is selected from one of coffee carbon, coconut shell charcoal, ceramic powder, bamboo charcoal and graphene.

5. A method for preparing a fabric printed on a PU microporous membrane according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) Combining the printed layer with the PU microporous membrane layer: Printing the slurry of the printed layer onto the PU microporous membrane using a screen printing process, drying and shaping at 140-160° C., with a printing speed of 18-22 m / min; (2) making base fabric; (3) coating an adhesive layer on the base fabric, bonding the other side of the PU microporous membrane obtained in step 1 to the adhesive layer at a bonding speed of 13-18 m / s, and drying at 25-30° C. to obtain the product.

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