Composite fabric with stiffness slow response characteristic

Abstract

The utility model relates to a composite fabric with a stiffness slow response characteristic. The composite fabric is composed of a stiff finishing base cloth (1), a stiff slow response coating (2) and a function strengthening coating, a stiff slow response coating (2) and a first function strengthening coating (3) are sequentially arranged on one surface of the stiff finishing base cloth (1), and a second function strengthening coating (4) is arranged on the other surface of the stiff finishing base cloth (1); wherein the stiff finishing base cloth is polyester canvas impregnated with melamine resin, the stiff slow response coating is a polyvinyl acetate coating, and the first function strengthening coating and the second function strengthening coating are polyurethane coatings. According to the multifunctional composite layer structure, the fabric is endowed with the stiffness slow response characteristic, and the wrinkle resistance, the bending resistance, the friction resistance, the temperature resistance and the moisture resistance of the composite fabric are enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of functional fabrics and relates to a composite fabric with the characteristic of slow stiffness response. Background Art

[0002] Shooting suits are essential equipment for athletes during shooting. In order to ensure the stability of athletes' shooting movements and to provide strong protection for athletes' cervical spine and back, athletes need to wear heavy, stiff and highly protective clothing to meet their high-intensity and long-term shooting training needs. Shooting suits are mostly made of cloth supplemented with leather. The cloth is often made of thick canvas, which has high technical content and great technical difficulty.

[0003] At present, most of the stiffened fabrics on the market that have been treated with stiffeners do not have the characteristics of slow stiffness response, have poor elasticity, and cannot play a certain damping and buffering role on human body movements. The application effect in shooting competitions and other special work scenes is poor. In addition, most of the stiffened fabrics treated with stiffeners have poor durability, and the hardness changes significantly under different temperature and humidity conditions, which seriously affects the support performance and service life of the fabrics in different use scenarios. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the utility model provides a composite fabric with slow response characteristics of stiffness. Its multifunctional composite layer structure gives the fabric slow response characteristics of stiffness and enhances the wrinkle resistance, bending resistance, friction resistance, temperature and moisture resistance of the composite fabric.

[0005] To achieve the above purpose, the utility model includes the following technical solutions:

[0006] A composite fabric with stiffness and slow response characteristics, which consists of a stiffening finished base fabric 1, a stiffening slow response coating 2 and a function strengthening coating; the stiffening slow response coating 2 and a first function strengthening coating 3 are arranged in sequence on one surface of the stiffening finished base fabric 1, and a second function strengthening coating 4 is arranged on the other surface of the stiffening finished base fabric 1; wherein, the stiffening finished base fabric is a polyester canvas impregnated with melamine resin, the stiffening slow response coating is a polyvinyl acetate coating, and the first function strengthening coating and the second function strengthening coating are both polyurethane coatings.

[0007] As described above, the composite fabric with slow stiffness response characteristics, preferably, the polyester canvas is woven with the core yarn 12 as the weft yarn and the original yarn 13 as the warp yarn.

[0008] As described above, for the composite fabric having the characteristic of slow stiffness response, preferably, the core yarn is a polyester raw yarn covered with a water-based polyurethane layer 14 .

[0009] As described above, for the composite fabric having the characteristic of slow stiffness response, preferably, the polyester canvas has a warp density of 70-80 strands / 10 cm and a weft density of 130-150 strands / 10 cm.

[0010] For the composite fabric having the stiffness slow response characteristic as described above, preferably, the stiffness slow response coating 2 has a thickness of 0.1-0.5 mm.

[0011] For the composite fabric with slow stiffness response characteristics as described above, preferably, the thickness of the first function-enhancing coating 3 is 0.1-0.5 mm.

[0012] For the composite fabric with slow stiffness response characteristics as described above, preferably, the thickness of the second function-enhancing coating 4 is 0.1-0.5 mm.

[0013] The beneficial effect of the utility model is that the base fabric of the composite fabric with slow stiffness response characteristics is polyester canvas impregnated with melamine resin, and the melamine resin can play a role in improving the stiffness of the fabric. A polyvinyl acetate coating is coated on the base fabric, and the coating connects the yarns of the composite fabric, so that the composite fabric can better disperse the stress when subjected to external force, and the stress is transmitted to the surroundings more evenly, so that the composite fabric has a certain damping performance, thereby causing the fabric to have a certain slow stiffness response characteristic. The outermost layer of the composite fabric is a polyurethane coating, which is covered on the surface of the fabric. On the one hand, the yarns are connected to each other, and the fabric will evenly disperse the stress when subjected to force. On the other hand, the coating enhances the viscoelasticity of the composite fabric, greatly increases the loss modulus, further enhances the damping performance, and enhances the slow stiffness response characteristics of the composite fabric. In addition, the coating also improves the wrinkle resistance, bending resistance, friction resistance, temperature and humidity resistance of the composite fabric.

[0014] In a preferred embodiment, the core yarn is fully impregnated in waterborne polyurethane (relative molecular weight between 45000-60000), followed by pressing and heat treatment to form a waterborne polyurethane coating layer outside the yarn. The flexible long polyol chain of the waterborne polyurethane combines with the yarn to give the composite fabric better elasticity, and can maintain a wide range of hardness changes within a certain time and pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the composite fabric structure with slow stiffness response characteristics of Example 1. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0017] Example 1

[0018] 1. Composite fabrics with slow stiffness response characteristics

[0019] like Figure 1 As shown, in a preferred embodiment of the present invention, the composite fabric with the stiffness slow response characteristic comprises a stiffening finishing base fabric 1, a stiffening slow response coating 2 and a function strengthening coating.

[0020] The stiffening finishing base fabric is a polyester canvas impregnated with melamine resin, including a polyester canvas and a melamine resin layer 11. The polyester canvas is woven with a core yarn 12 as a weft yarn and a raw yarn 13 as a warp yarn. The core yarn is a polyester raw yarn that is fully impregnated with water-based polyurethane (relative molecular weight between 45,000 and 60,000), followed by pressing and heat treatment, and a layer of water-based polyurethane layer 14 is formed outside the raw yarn. The warp density of the polyester canvas is 77.75 strands / 10 cm, and the weft density is 140.00 strands / 10 cm. The melamine resin accounts for 2.25% of the total weight of the stiffening finishing base fabric.

[0021] A polyvinyl acetate layer with a thickness of 0.5 mm and a polyurethane layer with a thickness of 0.1 mm are sequentially coated on one surface of the stiffening finished base fabric 1 as a stiffening slow response coating 2 and a first function strengthening coating 3; a polyurethane layer with a thickness of 0.2 mm is coated on the other surface of the stiffening finished base fabric 1 as a second function strengthening coating 4.

[0022] 2. Performance testing

[0023] (1) Stiffness test

[0024] Use the clothing thickness and hardness tester specified by the International Shooting Federation, place the fabric in the middle suspended on the test bench, and apply a weight of 1 kg to the center of the fabric. After the weight falls, the fabric sinks due to the weight, and the depth of the depression is the stiffness. The data displayed on the tester screen is the stiffness value of the fabric. The smaller the value, the greater the stiffness of the fabric. The larger the range of value change within the test time (0-60s), the better the viscoelasticity of the test part, that is, the fabric has a good slow response characteristic of stiffness. When testing fabrics with slow response characteristics of stiffness, record the stiffness at 0s, 30s, and 60s respectively. Measure the stiffness of each piece of fabric 5 times and take the average value.

[0025] After testing, the stiffness of the composite fabric changed from 2.1mm at 0s to 2.7mm at 1min. The stiffness change range of the fabric was about 0.6mm, and the slow response feature of stiffness was obvious.

[0026] (2) Wrinkle recovery angle test

[0027] The test was carried out according to AATCC66-2003 "Fabric Wrinkle Recovery: Recovery Angle Method". The fabric sample size was 4cm*1.5cm, 5 warp and 5 weft, and the test results were averaged.

[0028] The composite fabric has a wrinkle recovery angle of 260° and good wrinkle resistance.

[0029] (3) Bending resistance test

[0030] The bending resistance is tested using a leather folding tester. The sample to be tested is cut into a 10cm*10cm square. After being bent 5000 times in the leather folding tester, the stiffness of the bent part of the sample is tested. The difference between the stiffness of the sample after being bent and the stiffness before being bent can be regarded as the bending resistance of the fabric. The larger the difference, the worse the bending resistance.

[0031] The stiffness difference of the composite fabric before and after being bent 5000 times is about 0.4mm, with a small change range and good bending resistance.

[0032] (4) Wear resistance test

[0033] The test was conducted in accordance with the national standards GB / T21196.2-2007 "Determination of the abrasion resistance of textiles by the Martindale method - Part 2: Determination of specimen damage" and GB / T21196.3-2007 "Determination of the abrasion resistance of textiles by the Martindale method - Part 3: Determination of mass loss".

[0034] Use Martindale abrasion tester with 240-grit sandpaper as abrasive. Place the fabric to be tested on the platform below the abrasion tester and the sandpaper on the top. Test the stiffness of the fabric after 5000 frictions and compare it with the stiffness before friction. The smaller the difference, the better the friction resistance.

[0035] The stiffness difference of the composite fabric before and after 5000 frictions is 0.2mm, and the friction resistance is excellent.

[0036] (5) Temperature and humidity resistance test:

[0037] The temperature and humidity resistance of the fabric was tested using a computerized constant temperature and humidity chamber. The temperature was set at 35°C, and the humidity range was 18%-90%. As the humidity increased, the composite fabric gradually softened, but the softening was very small, and the stiffness softened by about 0.2mm, which shows that the composite fabric has excellent moisture resistance. The humidity was set at 42%, and the temperature range was 8°C-50°C. As the temperature increased, the fabric gradually softened, but the softening was also very small, and the stiffness softened by about 0.3mm, which shows that the composite fabric has excellent temperature resistance.

Claims

1. A composite fabric having a slow stiffness response characteristic, characterized in that: The invention is composed of a stiffening base fabric (1), a stiffening slow response coating (2) and a function-enhancing coating; the stiffening slow response coating (2) and a first function-enhancing coating (3) are arranged in sequence on one surface of the stiffening base fabric (1), and the second function-enhancing coating (4) is arranged on the other surface of the stiffening base fabric (1); wherein the stiffening base fabric is a polyester canvas impregnated with melamine resin, the stiffening slow response coating is a polyvinyl acetate coating, and the first function-enhancing coating and the second function-enhancing coating are both polyurethane coatings.

2. The composite fabric with slow stiffness response characteristics according to claim 1, characterized in that: The polyester canvas is woven by using core yarn (12) as weft yarn and raw yarn (13) as warp yarn.

3. The composite fabric with slow stiffness response characteristics as claimed in claim 2, characterized in that: The core yarn is a polyester raw material yarn covered with a water-based polyurethane layer (14).

4. The composite fabric with slow stiffness response characteristics as claimed in claim 2, characterized in that: The polyester canvas has a warp density of 70-80 strands / 10cm and a weft density of 130-150 strands / 10cm.

5. The composite fabric with slow stiffness response characteristics according to any one of claims 1 to 4, characterized in that: The thickness of the stiff slow response coating (2) is 0.1-0.5 mm.

6. The composite fabric with slow stiffness response characteristics according to any one of claims 1 to 4, characterized in that: The thickness of the first function-enhancing coating (3) is 0.1-0.5 mm.

7. The composite fabric with slow stiffness response characteristics according to any one of claims 1 to 4, characterized in that: The thickness of the second function-enhancing coating (4) is 0.1-0.5 mm.

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