CN118127837A - A composite fabric with high hardness, high elasticity and wide hardness variation range and preparation method thereof - Google Patents

A composite fabric with high hardness, high elasticity and wide hardness variation range and preparation method thereof Download PDF

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CN118127837A
CN118127837A CN202410404479.9A CN202410404479A CN118127837A CN 118127837 A CN118127837 A CN 118127837A CN 202410404479 A CN202410404479 A CN 202410404479A CN 118127837 A CN118127837 A CN 118127837A
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polyurethane
hardness
composite fabric
fabric
substrate
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CN118127837B (en
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王晓春
关晓宇
王越平
王志成
张丽平
薛佳璐
李秋宇
王永进
宋启迪
靳元元
李珍珍
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Beijing Institute Fashion Technology
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Beijing Institute Fashion Technology
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/06—Properties of the materials having thermal properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/10—Properties of the materials having mechanical properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/126—Permeability to liquids, absorption
    • D06N2209/128—Non-permeable
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1635—Elasticity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/10—Clothing

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Laminated Bodies (AREA)

Abstract

一种具有高硬度、高缓弹和宽硬度变化范围的复合织物及其制备方法，该复合织物是由基底与覆盖于基底上的增强体复合而成；其中，基底由基布采用水性聚氨酯浸轧或涂层处理而成，该水性聚氨酯为非离子型脂肪族聚氨酯，相对分子量在45000‑80000之间，元素含量中碳元素含量不高于40％，氮元素含量不高于10％；增强体为油性聚氨酯，包括脂肪族油性聚氨酯或芳香族聚氨酯中至少一种，相对分子量在50000‑85000之间，元素含量中碳元素含量不高于60％，氮元素含量不高于20％。该复合织物具有良好的硬挺效果、高缓弹性、不同温度与湿度条件下硬度稳定性良好，其制作方法简单，无毒性，对环境影响小。A composite fabric with high hardness, high elastic slowness and wide hardness variation range and a preparation method thereof, the composite fabric is composited by a substrate and a reinforcement covered on the substrate; wherein the substrate is formed by a base fabric dipped or coated with waterborne polyurethane, the waterborne polyurethane is a nonionic aliphatic polyurethane, the relative molecular weight is between 45000-80000, the carbon content in the element content is not higher than 40%, and the nitrogen content is not higher than 10%; the reinforcement is an oily polyurethane, including at least one of aliphatic oily polyurethane or aromatic polyurethane, the relative molecular weight is between 50000-85000, the carbon content in the element content is not higher than 60%, and the nitrogen content is not higher than 20%. The composite fabric has good stiffening effect, high elastic slowness, good hardness stability under different temperature and humidity conditions, and its preparation method is simple, non-toxic, and has little impact on the environment.

Description

Composite fabric with high hardness, high slow elasticity and wide hardness variation range and preparation method thereof
Technical Field
The invention relates to a textile hardening technology, in particular to a composite fabric with high hardness, high slow elasticity and wide hardness variation range and a preparation method thereof.
Background
In athletic sports games and many special works, the garment not only serves as a shade, but also needs to serve as a special support for the human body, which requires that the fabric have a certain stiffness. The types of finishing agents commonly used for improving the hardness of fabrics at present are more, and melamine resins, polyvinyl acetate, polyacrylate and the like are included. Wherein, the fabric after being finished by the melamine resin stiffening agent has high hardness, but free formaldehyde is easy to release; the polyvinyl acetate finishing agent has good hardness of finished fabrics, but the obtained fabrics have poor cold resistance, mechanical stability resistance, toughness and scratch resistance; the polyacrylate finishing agent has the advantages of good film forming property, strong adhesive force and the like, but the hardness of the finished fabric has the defects of hot adhesion and cold brittleness.
The fabric with stiffening effect currently developed on the market generally lacks slow elasticity, the hardness cannot change in a gradient manner under a certain time and a certain pressure condition, and the fabric lacks heavy feel. The simple hardness can play a supporting role but lacks of buffering and elastic energy, and can not play a certain damping and buffering effect on human body actions. And the wearing lacks comfort, and is difficult to meet the high-buffering and high-buffering requirements in some special scenes. Such as human body slow-bullet protection and shooting competition in special working scenes. The traditional fabric has poor hardness durability after being subjected to stiffness finishing, the hardness change under different temperature and humidity conditions is obvious, the supporting performance and the service cycle provided by the fabric under different use scenes are seriously influenced, and the service life of the garment is obviously reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the composite fabric with high hardness, high elasticity and wide hardness variation range and the preparation method thereof, and the composite fabric has the characteristics of high stiffness, effective support to human bodies (or substances), certain elasticity, wider hardness variation range, good stiffness and elasticity under the conventional environmental temperature and humidity conditions and the like, and can effectively meet the stability support requirements of various occasions to the human bodies (or substances).
In order to achieve the above purpose, the present invention provides the following technical solutions:
A composite fabric with high hardness, high slow elasticity and wide hardness variation range is formed by compounding a substrate and a reinforcement covered on the substrate; the substrate is formed by padding or coating the base cloth with water-based polyurethane, the water-based polyurethane is nonionic aliphatic polyurethane, the relative molecular weight is 45000-80000, the content of carbon element in the element content is not higher than 40%, and the content of nitrogen element is not higher than 10%; the reinforcing body is oily polyurethane, comprises at least one of aliphatic oily polyurethane or aromatic polyurethane, has a relative molecular weight of 50000-85000, contains no more than 60% of carbon element in the element content, and contains no more than 20% of nitrogen element.
The mass ratio of the base fabric to the aqueous polyurethane is preferably 1:0.2-0.5.
The composite fabric as described above, preferably, the thickness of the base fabric is 0.8-2.4mm; the thickness of the substrate is 0.9-2.5mm, and the mass ratio of the base fabric in the composite fabric is not lower than 35%.
Preferably, the fiber raw material of the base fabric comprises at least one of polyester, polyamide, polyethylene and polypropylene, the gram weight is not lower than 600g/m 2, the warp density is 100-180 pieces/10 cm, and the weft density is 50-120 pieces/10 cm.
The composite fabric as described above, preferably the reinforcement has a thickness of 0.1-1.0mm and the composite fabric has a thickness of not more than 2.6mm.
The composite fabric is preferably PT-536H aqueous carbon polyurethane and/or LD-6209 aqueous polyurethane.
The composite fabric as described above, preferably the oily polyurethane is MR-329 oily polyurethane and/or D-006 oily polyurethane.
In another aspect, the present invention provides a method of preparing a composite fabric as described above, the method comprising the steps of:
I. preparation of the substrate
The base cloth is padded or coated with water polyurethane, wherein,
The soaking time of the padding process is 10-720min, the pressure is 0.1-0.5Mpa, the heat treatment is carried out after the padding, the temperature is 20-160 ℃ and the heat treatment time is 2-90min;
the thickness of the coating layer in the coating process is 0.05-1.00mm, the coating times are 1-3 times, and the heat treatment is carried out after the coating, the temperature is 80-150 ℃ and the heat treatment time is 2-10min;
II, compounding of base and oily polyurethane
The substrate is coated with oily polyurethane for 1-3 times, the heat treatment temperature is 100-160 ℃, the heat treatment time is 2-8min, and the thickness of the coating is 0.05-0.7mm.
The beneficial effects of the invention are as follows:
1. According to the invention, the molecular structure characteristics of the aqueous polyurethane and the oily polyurethane finishing agent are utilized, the polyol flexible long chain of the aqueous polyurethane is combined with the base cloth to endow the composite fabric with better slow elasticity, a wider hardness change range can be kept within a certain time and pressure, and the hardness change range of the obtained composite fabric within 60 seconds can reach more than 1 mm. The strength of the consolidated body formed by the oily polyurethane adhered to the outer layer of the substrate is high, the permeability resistance is good, the composite fabric has good temperature resistance and humidity resistance change performance, and the hardness change of the obtained composite fabric in the humidity range of 18% -90% can be less than or equal to 0.3mm.
2. The thickness of the composite fabric prepared by the method is not more than 2.6mm, the initial hardness is not less than 0.5mm, the hardness within one minute is not more than 4.3mm, the composite fabric has excellent hardness, slow elasticity and thick feel, has excellent heat and humidity resistant hardness stability, and meets the strong support stability provided by the fabric under various requirements.
3. The preparation method is simple, has no toxicity and has little influence on the environment.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention.
Part of the raw material sources used in the following examples:
PT-536H polyurethane hardness finishing liquid: (relative molecular weight 50000-60000, guangzhou Lvbao New Material Co., ltd.).
MR-329 oily polyurethane hardness finishing liquid: (relative molecular weight: 60000-80000, guangdong A. Pseudo-ginseng chemical technology Co., ltd.).
LD-6209 polyurethane hardness finishing liquid: (relative molecular weight: 50000-70000, guangzhou Lou New Material Co., ltd.).
D-006 oily polyurethane hardness finishing liquor: (relative molecular weight: 65000-75000).
Example 1
1. Preparation of the substrate
The polyester fabric 1 (thickness 1.2mm, gram weight 670g/m 2, warp density 160 pieces/10 cm, weft density 105 pieces/10 cm) and the polyester fabric 2 (thickness 1.1mm, gram weight 630g/m 2, warp density 140 pieces/10 cm, weft density 90 pieces/10 cm) are respectively put into PT-536H water-based polyurethane for full impregnation for 3 hours, and then are extruded by a padder (padder pressure 0.25 MPa) and heated and dried by an oven (dried at 100 ℃ for 10 minutes) to obtain a substrate 1 and a substrate 2 respectively.
2. Substrate and oily polyurethane composite
The substrate compounded by the aqueous polyurethane and the polyester fabric is respectively coated by MR-329 oily polyurethane, the two sides of the substrate are respectively coated by a scraper, the thickness is 0.1mm, and the substrate is baked for 8min at 120 ℃ to respectively obtain a compound fabric 1 and a compound fabric 2.
3. Hardness test of composite fabrics
The stiffness test uses internationally-connected appointed clothing thickness measuring and hardening measuring instrument, the middle of the fabric is suspended on a measuring table, a heavy hammer applies 1Kg force to the center of the fabric, after the heavy hammer falls down, the fabric sags due to load, and the indentation depth is the stiffness. The data displayed on the screen of the tester is the fabric stiffness value, and the smaller the value is, the larger the fabric stiffness is. The larger the numerical value change range within the test time (0-60 s) is, the better the viscoelasticity of the test part is, namely the fabric has good stiffness slow response characteristic. When fabrics with slow stiffness response characteristics were tested, the stiffness at 0s, 30s, 60s were recorded, respectively. Each fabric was measured for 5 stiffness and averaged.
The performance of the treated composite fabric is shown in tables 1 and 2, wherein the composite fabric 1+2 is obtained by stacking the composite fabrics 1 and 2 up and down, and the hardness test data are hardness values corresponding to 0s-30s-60s respectively.
Table 1 hardness and thickness of composite fabrics
TABLE 2 influence of temperature and humidity on 1+2 hardness of composite fabrics
Tables 1 and 2 show that the composite fabric has high hardness, excellent slow elasticity and temperature and humidity resistance, the initial hardness values are all less than 3, the hardness change of the single-layer composite fabric within 1min is 1.1mm, the hardness change of the double-layer composite fabric within 1min is 1.0mm, the hardness change within the test temperature range is extremely small, only 0.1mm, and the test hardness change range within the test humidity range is 0.3mm when the test humidity range is 0 s.
Example 2
1. Preparation of composite Fabric 1
Adding 50% LD-6209 aqueous polyurethane solution into polyester base cloth 1 (1.0 mm thick, 600g/m 2 g/m, 130 warp density/10 cm, 80 weft density/10 cm), fully padding and drying (padder pressure 0.20Mpa,90 ℃ for 20 min), coating the aqueous polyurethane treated substrate with D-006 oily polyurethane, coating with a scraper, and baking at 150 ℃ for 3min.
2. Preparation of composite Fabric 2
Polyester base cloth 2 (with the thickness of 1.0mm, the gram weight of 600g/m 2, the warp density of 130 pieces/10 cm and the weft density of 80 pieces/10 cm) is coated and compounded by D-006 oily polyurethane, a doctor is adopted for coating 1 channel, the total thickness of the coating is 0.3mm, and the baking is carried out for 3min at 150 ℃.
3. Hardness test of composite fabrics
The composite fabric performance is shown in tables 3 and 4, and the composite fabrics 1+2 are obtained by stacking the composite fabrics 1 and 2 one above the other, wherein the hardness test data are respectively corresponding hardness values of 0s-30s-60 s.
Table 3 hardness and thickness of composite fabrics
TABLE 4 influence of temperature and humidity on 1+2 hardness of composite fabrics
Tables 3 and 4 show that the composite fabrics have good hardness, high slow elasticity and high temperature and humidity resistance, the hardness changes of the single-layer composite fabrics 1 and 2 within 1min are respectively 0.7mm and 0.4mm, and the hardness results of the composite fabrics 1 and 2 show that the hardness change range of the fabrics can be widened by the water-based polyurethane treatment; the hardness change of the double-layer composite fabric within 1min is 0.6mm; the hardness change is very small (0.1 mm) in the test temperature range; the initial hardness variation in the test humidity range was 0.2.
Example 3
1. Preparation of the substrate
Polyester base cloth 1 (thickness 1.0mm, gram weight 600g/m 2, warp density 130 g/10 cm, weft density 80 g/10 cm) and polyester base cloth 2 (thickness 1.0mm, gram weight 610g/m 2, warp density 135 g/10 cm, weft density 85 g/10 cm) were coated with LD-6209 aqueous polyurethane, doctor blade was used for coating 1 track, and the coating thicknesses were all 0.1mm, and were dried at 120℃for 6 minutes, to obtain substrate 1 and substrate 2, respectively.
2. Substrate and oily polyurethane composite
And (3) respectively coating and compounding the water-based polyurethane and polyester fabric compounded substrates by using MR-329 oily polyurethane, coating a scraper by 1 layer, wherein the thickness of the coating is 0.1mm, and drying at 160 ℃ for 2min to respectively obtain a compound fabric 1 and a compound fabric 2.
3. Hardness test of composite fabrics
The performance of the treated composite fabric is shown in tables 5 and 6, wherein the composite fabric 1+2 is obtained by stacking the composite fabric 1 and the composite fabric 2 up and down, and the hardness test data are hardness values corresponding to 0s-30s-60s respectively.
Table 5 hardness and thickness of composite fabrics
TABLE 6 influence of temperature and humidity on 1+2 hardness of composite fabrics
Tables 5 and 6 show that the composite fabrics have excellent hardness, high-slow elasticity and high-temperature and humidity resistance, the hardness change of the single-layer composite fabrics 1 and 2 in 1min is 0.7mm, the hardness change of the double-layer composite fabrics in 1min is 0.5mm, the hardness change in the test temperature range is very small, the hardness change in the test temperature range is only 0.1mm, and the hardness change range in the test humidity range is 0.2mm.
Example 4
1. Preparation of composite fabrics
Putting a polyester base cloth (with the thickness of 1.1mm, the gram weight of 640g/m 2, the warp density of 145 pieces/10 cm and the weft density of 95 pieces/10 cm) into a PT-536H aqueous polycarbonate polyurethane solution with the concentration of 50%, fully padding and drying (the padding pressure of 0.15mpa and the drying at 95 ℃ for 15 min), then coating the substrate treated by the aqueous polyurethane by using D-006 oily polyurethane, and baking for 4min at the temperature of 145 ℃ with the thickness of 0.1mm for each side of the coating by using a scraper to obtain the composite fabric 1.
2. Hardness test of composite fabrics
The performance of the composite fabric is shown in tables 7 and 8, and the composite fabric 2 is obtained by stacking two layers of composite fabric 1, wherein the hardness test data are hardness values corresponding to 0s-30s-60s respectively.
Table 7 hardness and thickness of composite fabrics
TABLE 8 influence of temperature and humidity on the hardness of composite fabric 2
Tables 7 and 8 show that the composite fabric has good hardness, high slow elasticity and high temperature and humidity resistance, and the hardness change of the single-layer composite fabric within 1min is 0.9mm; the hardness change of the double-layer composite fabric within 1min is 0.8mm; the hardness change is very small (0.1 mm) in the test temperature range; the initial hardness variation in the test humidity range was 0.3.
Comparative example 1
The same procedure as in example 1 was followed except that step 1 was conducted by padding treatment with aqueous polyurethane having a molecular weight of 120000 (polymerized from aliphatic diisocyanate and polyethylene glycol monomers), to finally obtain composite fabric 1 and composite fabric 2.
The properties of the treated composite fabric are shown in Table 9, wherein the hardness test data are hardness values corresponding to 0s-30s-60s, respectively.
Table 9 hardness and thickness of composite fabrics
Table 9 shows that the slow elasticity and hardness variation range of the composite fabric are significantly reduced by the aqueous polyurethane treatment with the molecular weight of 120000 compared with example 1, and the hardness variation ranges of the single-layer composite fabric 1, the double-layer composite fabric 2 and the double-layer composite fabric in 1min are respectively 0.5mm, 0.4mm and 0.4mm.
Comparative example 2
Composite fabric 1 and composite fabric 2 were obtained by coating the substrate of the composite aqueous polyurethane with an oily polyurethane having a molecular weight of 130000 (polymerized from an aromatic diisocyanate and polytetrahydrofuran diol monomer) in the same manner as in example 1, respectively.
The properties of the treated composite fabric are shown in Table 10, wherein the hardness test data are hardness values corresponding to 0s-30s-60s, respectively.
Table 10 hardness and thickness of composite fabrics
Table 10 shows that the slow elasticity and hardness variation range of the composite fabric are significantly reduced compared with example 1 by using the oily polyurethane coating with molecular weight 130000, and the hardness variation ranges of the single-layer composite fabric 1, the single-layer composite fabric 2 and the double-layer composite fabric within 1min are respectively 0.5mm, 0.4mm and 0.4mm.
Comparative example 3
Respectively putting the polyester fabric 1 (with the thickness of 1.2mm, the gram weight of 670g/m 2, the warp density of 160 pieces/10 cm and the weft density of 105 pieces/10 cm) and the polyester canvas fabric 2 (with the thickness of 1.1mm, the gram weight of 630g/m 2, the warp density of 140 pieces/10 cm and the weft density of 90 pieces/10 cm) into PT-536H aqueous polyurethane for full impregnation, and extruding by a padder (the padder pressure of 0.25 MPa) and heating and drying by a baking oven (drying at 110 ℃ for 10 min); and then coating the substrate compounded by the waterborne polyurethane and the polyester fabric by using PT-536H waterborne polyurethane, coating both sides of the substrate by using a scraper with the thickness of 0.1mm, and then drying at 130 ℃ for 5min.
The properties of the treated composite fabric are shown in Table 11, wherein the hardness test data are hardness values corresponding to 0s-30s-60s, respectively.
TABLE 11 influence of temperature and humidity on 1+2 hardness of composite fabrics
Table 11 shows that the temperature and humidity resistance of the composite fabric is significantly reduced compared to example 1 by padding and coating with only aqueous polyurethane. The hardness of the composite fabric is greatly improved at low temperature, the high temperature is obviously softened, and the hardness variation range obtained by testing at different temperatures for 60s is 1.1mm; the composite fabric becomes significantly softer at high humidity and the hardness variation range obtained by testing at 60s at different humidities is 1.0mm.
Comparative example 4
Respectively putting the polyester fabric 1 (with the thickness of 1.2mm, the gram weight of 670g/m 2, the warp density of 160 pieces/10 cm and the weft density of 105 pieces/10 cm) and the polyester fabric 2 (with the thickness of 1.1mm, the gram weight of 630g/m 2, the warp density of 140 pieces/10 cm and the weft density of 90 pieces/10 cm) into D-006 oily polyurethane for full impregnation, and extruding by a padder (the padder pressure of 0.30 MPa) and heating and drying by a baking oven (drying at 140 ℃ for 5 min); and then coating the substrate compounded by the oily polyurethane and the polyester fabric by using the D-006 oily polyurethane, coating both sides of the substrate by using a scraper with the thickness of 0.1mm, and then drying at 140 ℃ for 4min.
The properties of the treated composite fabric are shown in Table 12, wherein the hardness test data are hardness values corresponding to 0s-30s-60s, respectively.
Table 12 hardness and thickness of composite fabrics
Table 12 shows that the composite fabric has hardness of less than 3mm when only the oily polyurethane is padded and coated, and the hardness variation range is significantly reduced, and the hardness variation range obtained by testing at 60s is 0.4mm.
Comparative example 5
Polyester fabric 1 (thickness 1.2mm, gram weight 670g/m 2, warp density 160 pieces/10 cm, weft density 105 pieces/10 cm) and polyester fabric 2 (thickness 1.2mm, gram weight 670g/m 2, warp density 160 pieces/10 cm, weft density 105 pieces/10 cm) were respectively put into RUCO-PLAST HLS polyvinyl acetate solution for full impregnation, extruded by a padder (padder pressure 0.30 MPa), and oven-dried (oven-dried at 140 ℃ for 3 min).
The properties of the treated composite fabrics are shown in Table 13 and Table 14, wherein the hardness test data are hardness values corresponding to 0s-30s-60s respectively.
Table 13 hardness and thickness of composite fabrics
TABLE 14 influence of temperature and humidity on 1+2 hardness of composite fabrics
Table 14 shows that the range of variation of the fabric at low temperature of the polyvinyl acetate finished composite fabric is drastically reduced, and the range of variation of hardness of the composite fabric at 8 ℃ C is only 0.1mm, without cushioning property.

Claims (8)

1. A composite fabric with high hardness, high slow elasticity and wide hardness variation range is characterized by being formed by compounding a substrate and a reinforcement covered on the substrate; the substrate is formed by padding or coating the base cloth with water-based polyurethane, the water-based polyurethane is nonionic aliphatic polyurethane, the relative molecular weight is 45000-80000, the content of carbon element in the element content is not higher than 40%, and the content of nitrogen element is not higher than 10%; the reinforcing body is oily polyurethane, comprises at least one of aliphatic oily polyurethane or aromatic polyurethane, has a relative molecular weight of 50000-85000, contains no more than 60% of carbon element in the element content, and contains no more than 20% of nitrogen element.
2. The composite fabric of claim 1, wherein the mass ratio of the base fabric to the aqueous polyurethane is 1: (0.2-0.5).
3. The composite fabric of claim 1, wherein the base fabric has a thickness of 0.8-2.4mm; the thickness of the substrate is 0.9-2.5mm, and the mass ratio of the base fabric in the composite fabric is not lower than 35%.
4. The composite fabric of claim 1, wherein the fiber raw material of the base fabric comprises at least one of polyester, polyamide, polyethylene and polypropylene, and has a gram weight of not less than 600g/m 2, a warp density of 100-180/10 cm, and a weft density of 50-120/10 cm.
5. The composite fabric of claim 1, wherein the reinforcement has a thickness of 0.1-1.0mm and the composite fabric has a thickness of no greater than 2.6mm.
6. The composite fabric according to any one of claims 1 to 5, wherein the aqueous polyurethane is PT-536H aqueous polycarbopolyurethane and/or LD-6209 aqueous polyurethane.
7. The composite fabric according to any one of claims 1 to 5, wherein the oily polyurethane is MR-329 oily polyurethane and/or D-006 oily polyurethane.
8. A method of producing a composite fabric according to any one of claims 1 to 7, comprising the steps of:
I. preparation of the substrate
The base cloth is padded or coated with water polyurethane, wherein,
The soaking time of the padding process is 10-720min, the pressure is 0.1-0.5Mpa, the heat treatment is carried out after the padding, the temperature is 20-160 ℃ and the heat treatment time is 2-90min;
the thickness of the coating layer in the coating process is 0.05-1.00mm, the coating times are 1-3 times, and the heat treatment is carried out after the coating, the temperature is 80-150 ℃ and the heat treatment time is 2-10min;
II, compounding of base and oily polyurethane
The substrate is coated with oily polyurethane for 1-3 times, the heat treatment temperature is 100-160 ℃, the heat treatment time is 2-8min, and the thickness of the coating is 0.05-0.7mm.
CN202410404479.9A 2024-04-03 2024-04-03 A composite fabric with high hardness, high elasticity, and a wide range of hardness variation, and its preparation method. Active CN118127837B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101736595A (en) * 2009-12-24 2010-06-16 浙江理工大学 Method for preparing waterproof moisture-permeable coated fabric
TWI561379B (en) * 2016-03-21 2016-12-11 San Fang Chemical Industry Co Slim and high strength composite laminate and manufacturing method thereof
CN206337457U (en) * 2016-12-23 2017-07-18 江苏万马塑胶有限公司 A kind of aqueous, oiliness polyurethane composite lether
KR20180091173A (en) * 2017-02-06 2018-08-16 (주)엘지하우시스 synthetic leather for automobile
CN114013136A (en) * 2021-11-18 2022-02-08 中国人民解放军空军特色医学中心 Polyurethane adhesive tape and preparation method thereof
CN117005213A (en) * 2023-08-09 2023-11-07 江苏华峰超纤材料有限公司 Preparation and application of a water-based polyurethane composite coating with high ductility

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101736595A (en) * 2009-12-24 2010-06-16 浙江理工大学 Method for preparing waterproof moisture-permeable coated fabric
TWI561379B (en) * 2016-03-21 2016-12-11 San Fang Chemical Industry Co Slim and high strength composite laminate and manufacturing method thereof
CN206337457U (en) * 2016-12-23 2017-07-18 江苏万马塑胶有限公司 A kind of aqueous, oiliness polyurethane composite lether
KR20180091173A (en) * 2017-02-06 2018-08-16 (주)엘지하우시스 synthetic leather for automobile
CN114013136A (en) * 2021-11-18 2022-02-08 中国人民解放军空军特色医学中心 Polyurethane adhesive tape and preparation method thereof
CN117005213A (en) * 2023-08-09 2023-11-07 江苏华峰超纤材料有限公司 Preparation and application of a water-based polyurethane composite coating with high ductility

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