A process for preparing film-coated fabric by peeling method

Abstract

The present invention discloses a process for preparing a film-coated fabric by peeling, comprising the following steps: preparing an active adhesive layer; treating a substrate fabric and an organosilicon film respectively by plasma technology to obtain a pre-treated substrate fabric and a pre-treated organosilicon film respectively; gluing the active adhesive layer to the surface of the pre-treated substrate fabric by roller pattern, forming, laser scanning the surface of the adhesive layer by laser, obtaining a three-dimensional pre-treated substrate fabric with a micropore array, and then attaching a pre-treated organosilicon film to the other side of the adhesive layer, heating and rolling by upper and lower pressing rollers, wherein the temperature of the upper pressing roller is 70-80°C, to obtain the film-coated fabric. The present invention not only has a low hot pressing temperature, but also can balance the thermal insulation performance and the air permeability performance, and the aperture and distribution uniformity of the air permeable pores can be precisely controlled by the corresponding parameters, so as to achieve the advantages of stable air permeability and moisture permeability and high product consistency.

Description

Technical Field

[0001] The invention relates to the technical field of film-coated fabrics, and in particular to a process for preparing film-coated fabrics by peeling. Background Art

[0002] With the improvement of living standards, people's functional demands for fabrics are becoming increasingly diversified. Laminated fabric is a relatively new type of fabric that has windproof properties and is used to make functional clothing such as windproof clothing.

[0003] At present, in addition to the selection of coating materials, the fabric-coating preparation process is also a problem that needs to be solved in fabric research and development. The traditional thermal bonding method is used, and the adhesive needs to be softened by heating during bonding. However, the heating process not only consumes a large amount of electricity, but also produces volatile gases that are harmful to the human body and the environment after high-temperature heating, which does not meet environmental protection requirements. In addition, the existing coated fabrics compound polymer films on the fabric layer, and use the polymer films to block the pores of the fabric layer to play a windproof role, but the air permeability of this type of coated fabric is very poor.

[0004] At present, in order to increase the air permeability of the coated fabric, a polymer film with a microporous structure is used to balance the windproof performance and the air permeability. However, during the thermal bonding process, the polymer film with a microporous structure also has the problem of high thermal bonding temperature and difficulty in controlling the uniformity of the micropore distribution, which makes it difficult to maintain a stable air permeability effect of the coated fabric. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a process for preparing a coated fabric by peeling.

[0006] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0007] S1. Add 40-60 parts of polyether triol MN-500, 20-40 parts of polyether triol EP-330N, 1-2 parts of 4,4'-methylenebis(2-chloroaniline), 1-2 parts of foaming agent, 5-12 parts of polyoxyethylene glycerol ether, 0.1-1 parts of catalyst, and 1-10 parts of water to a mixing tank by weight, stir at a temperature of 30-50° C., add 20-60 parts of isocyanate prepolymer and continue stirring for 10-60 seconds to obtain an active adhesive layer;

[0008] S2, treating the substrate fabric and the organosilicon film respectively by plasma technology, during which normal pressure direct current glow discharge is used to obtain pre-treated substrate fabric and pre-treated organosilicon film respectively;

[0009] S3. Apply the active adhesive layer to the surface of the pretreated substrate fabric by using a roller pattern to form it. Use a laser to scan the surface of the adhesive layer to obtain a three-dimensional pretreated substrate fabric with a micropore array. Then attach a pretreated silicone film to the other side of the adhesive layer, and use an upper and lower pressure rollers to heat and press, wherein the temperature of the upper pressure roller is 70-80°C to obtain a coated fabric.

[0010] Preferably, in S1, the catalyst is an organic tin catalyst, preferably dibutyltin dilaurate.

[0011] Preferably, in S1, the uniform foaming agent is uniform foaming agent L2580.

[0012] Preferably, in S2, during the discharge process, the discharge power is 85-110 W, the plate spacing is 2-4 mm, the processing speed is 60-80 mm / min, the processing time is 2-4 min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:1-4 ml / min.

[0013] Preferably, in S2, the organic silicon film is an organic silicon PDMS film with a thickness of 50 μm.

[0014] Preferably, in S2, the base fabric is one of polyester, nylon and cotton.

[0015] Preferably, in S3, the amount of sizing applied to the surface of the pre-treated substrate fabric is 5-12 g / m 2 .

[0016] Preferably, in S3, the wavelength of the laser is 1064 nm and the pulse energy is 0.5 mJ.

[0017] A film-coated fabric is produced by adopting the film-coated fabric preparation process.

[0018] The technical effects of the present invention are as follows:

[0019] In the present invention, the isocyanate group reacts with water to generate a urea bond and carbon dioxide, and the active adhesive layer formed by the L2580 foaming agent and polyoxyethylene glycerol ether has a large space position due to the large number of void structures contained in the flexible chains of the macromolecular polyether. The formed active adhesive layer is not only extremely flexible, but also can be glued to the surface of the pretreated substrate fabric. Since the surface of the substrate fabric can be effectively activated by plasma treatment, the two have good affinity. After forming, the surface of the adhesive layer is laser scanned to effectively increase the surface roughness of the adhesive layer. It is further combined with the pretreated organic silicon film through hot pressing. Under the premise of effectively reducing the pressing temperature, the mutual bonding strength is high, and the fabric not only has excellent mechanical properties, but also has excellent air permeability and moisture permeability on the basis of ensuring thermal insulation performance.

[0020] The present invention not only has a low hot pressing temperature, but also maintains the relative freedom of movement of the yarns in the original fabric structure to the greatest extent, thereby maintaining its tensile, shear elasticity and bending flexibility, making the composite fabric light, thin, soft and elastic, ensuring skin comfort and freedom of human movement, while balancing thermal insulation performance and breathability, and the aperture and distribution uniformity of the air holes can be precisely controlled by corresponding parameters to achieve the advantages of stable air permeability and moisture permeability and high product consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The heat transfer coefficient and thermal insulation rate test chart of the fabrics obtained in Example 5 and Comparative Examples 1-2.

[0022] Figure 2 This is a test chart of the Crowe value of the fabrics obtained in Example 5 and Comparative Examples 1-2.

[0023] Figure 3 The figure is a test chart of the air permeability and moisture permeability of the fabrics obtained in Example 5 and Comparative Examples 1-2. DETAILED DESCRIPTION

[0024] The present invention will be further explained below in conjunction with specific embodiments.

[0025] Example 1

[0026] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0027] S1. Add 40 kg of polyether triol MN-500, 20 kg of polyether triol EP-330N, 1 kg of 4,4'-methylenebis(2-chloroaniline), 1 kg of homogenizing agent L2580, 5 kg of polyoxyethylene glycerol ether, 0.1 kg of dibutyltin dilaurate, and 1 kg of water into a mixing tank, stir at 30°C for 10 min, add 20 kg of isocyanate prepolymer and continue stirring for 10 s to obtain an active adhesive layer;

[0028] The isocyanate prepolymer is an isocyanate prepolymer (9048-57-1), brand: domestic Hubei;

[0029] S2. Treat the polyester fabric and the silicone film respectively by plasma technology. During the treatment process, normal pressure DC glow discharge is used, the discharge power is 85W, the plate spacing is 2mm, the treatment speed is 60mm / min, the treatment time is 2min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:14ml / min, and the pretreated substrate fabric and pretreated silicone film are obtained respectively;

[0030] The organic silicon film is an organic silicon PDMS film with a thickness of 50 μm, purchased from Hangzhou Guini New Material Technology Co., Ltd.

[0031] S3, use roller pattern to glue the active adhesive layer to the surface of the pre-treated substrate fabric, and the glue application amount is 5g / m 2 , forming, using a laser with a wavelength of 1064nm and a pulse energy of 0.5mJ to laser scan the surface of the bonding layer to obtain a three-dimensional pretreated substrate fabric with a micropore array, and then attach a pretreated silicone film to the other side of the bonding layer, and use an upper pressing roller and a lower pressing roller to heat and press, wherein the temperature of the upper pressing roller is 70°C, to obtain a coated fabric.

[0032] Example 2

[0033] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0034] S1, add 60kg polyether triol MN-500, 40kg polyether triol EP-330N, 2kg 4,4'-methylenebis(2-chloroaniline), 2kg homogenizing agent L2580, 12kg polyoxyethylene glycerol ether, 1kg dibutyltin dilaurate, and 10kg water into a mixing tank, stir at 50°C for 30min, add 60kg isocyanate prepolymer and continue stirring for 60s to obtain an active adhesive layer;

[0035] The isocyanate prepolymer is an isocyanate prepolymer (9048-57-1), brand: domestic Hubei;

[0036] S2. Treat the polyester fabric and the silicone film respectively by plasma technology. During the treatment process, normal pressure DC glow discharge is used, the discharge power is 110W, the plate spacing is 4mm, the treatment speed is 80mm / min, the treatment time is 4min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:4ml / min, and the pretreated substrate fabric and pretreated silicone film are obtained respectively;

[0037] The organic silicon film is an organic silicon PDMS film with a thickness of 50 μm, purchased from Hangzhou Guini New Material Technology Co., Ltd.

[0038] S3, use roller pattern to glue the active adhesive layer to the surface of the pre-treated substrate fabric, the glue application amount is 12g / m 2 , forming, using a laser with a wavelength of 1064nm and a pulse energy of 0.5mJ to laser scan the surface of the adhesive layer to obtain a three-dimensional pretreated substrate fabric with a micropore array, and then attach a pretreated silicone film to the other side of the adhesive layer, and use an upper pressure roller and a lower pressure roller to heat and press, wherein the temperature of the upper pressure roller is 80°C, to obtain a coated fabric.

[0039] Example 3

[0040] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0041] S1. Add 45 kg of polyether triol MN-500, 22 kg of polyether triol EP-330N, 1.3 kg of 4,4'-methylenebis(2-chloroaniline), 1.2 kg of homogenizing agent L2580, 6 kg of polyoxyethylene glycerol ether, 0.2 kg of dibutyltin dilaurate, and 2 kg of water into a mixing tank, stir at 32° C. for 15 min, add 30 kg of isocyanate prepolymer and continue stirring for 10-60 s to obtain an active adhesive layer;

[0042] The isocyanate prepolymer is an isocyanate prepolymer (9048-57-1), brand: domestic Hubei;

[0043] S2. Treat the cotton nylon fabric and the silicone film respectively by plasma technology. During the treatment process, normal pressure DC glow discharge is adopted, the discharge power is 90W, the plate spacing is 3mm, the treatment speed is 65mm / min, the treatment time is 2.5min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:1.5ml / min, and the pretreated substrate fabric and pretreated silicone film are obtained respectively;

[0044] The organic silicon film is an organic silicon PDMS film with a thickness of 50 μm, purchased from Hangzhou Guini New Material Technology Co., Ltd.

[0045] S3, use roller pattern to glue the active adhesive layer to the surface of the pre-treated substrate fabric, and the glue application amount is 7g / m 2 , forming, using a laser with a wavelength of 1064nm and a pulse energy of 0.5mJ to laser scan the surface of the adhesive layer to obtain a three-dimensional pretreated substrate fabric with a micropore array, and then attach a pretreated silicone film to the other side of the adhesive layer, and use upper and lower pressure rollers to heat and press, with the upper pressure roller temperature at 72°C to obtain a coated fabric.

[0046] Example 4

[0047] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0048] S1, add 55kg polyether triol MN-500, 35kg polyether triol EP-330N, 1.8kg 4,4'-methylenebis(2-chloroaniline), 1.6kg homogenizing agent L2580, 10kg polyoxyethylene glycerol ether, 0.7kg dibutyltin dilaurate, and 8kg water into a mixing tank, stir at 45°C for 24min, add 55kg isocyanate prepolymer and continue stirring for 50s to obtain an active adhesive layer;

[0049] The isocyanate prepolymer is an isocyanate prepolymer (9048-57-1), brand: domestic Hubei;

[0050] S2. Treat the cotton nylon fabric and the silicone film respectively by plasma technology. During the treatment process, normal pressure DC glow discharge is adopted, the discharge power is 105W, the plate spacing is 4mm, the treatment speed is 75mm / min, the treatment time is 3min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:3ml / min, and the pretreated substrate fabric and pretreated silicone film are obtained respectively;

[0051] The organic silicon film is an organic silicon PDMS film with a thickness of 50 μm, purchased from Hangzhou Guini New Material Technology Co., Ltd.

[0052] S3, use roller pattern to glue the active adhesive layer to the surface of the pre-treated substrate fabric, the glue application amount is 10g / m 2 , forming, using a laser with a wavelength of 1064nm and a pulse energy of 0.5mJ to laser scan the surface of the bonding layer to obtain a three-dimensional pretreated substrate fabric with a micropore array, and then attach a pretreated silicone film to the other side of the bonding layer, and use upper and lower pressure rollers to heat and press, with the upper pressure roller temperature at 78°C to obtain a coated fabric.

[0053] Example 5

[0054] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0055] S1, add 50kg polyether triol MN-500, 30kg polyether triol EP-330N, 1.6kg 4,4'-methylenebis(2-chloroaniline), 1.5kg homogenizing agent L2580, 8kg polyoxyethylene glycerol ether, 0.5kg dibutyltin dilaurate, and 5kg water into a mixing tank, stir at 40°C for 20min, add 40kg isocyanate prepolymer and continue stirring for 50s to obtain an active adhesive layer;

[0056] The isocyanate prepolymer is an isocyanate prepolymer (9048-57-1), brand: domestic Hubei;

[0057] S2. Treat the cotton nylon fabric and the silicone film respectively by plasma technology. During the treatment process, normal pressure DC glow discharge is adopted, the discharge power is 100W, the plate spacing is 3mm, the treatment speed is 70mm / min, the treatment time is 3min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:3ml / min, and the pretreated substrate fabric and pretreated silicone film are obtained respectively;

[0058] The organic silicon film is an organic silicon PDMS film with a thickness of 50 μm, purchased from Hangzhou Guini New Material Technology Co., Ltd.

[0059] S3, use roller pattern to glue the active adhesive layer to the surface of the pre-treated substrate fabric, the glue application amount is 10g / m 2 , forming, using a laser with a wavelength of 1064nm and a pulse energy of 0.5mJ to laser scan the surface of the adhesive layer to obtain a three-dimensional pretreated substrate fabric with a micropore array, and then attach a pretreated silicone film to the other side of the adhesive layer, and use upper and lower pressure rollers to heat and press, where the temperature of the upper pressure roller is 75°C to obtain a coated fabric.

[0060] Comparative Example 1

[0061] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0062] S1. Treat the cotton nylon fabric and the silicone film respectively by plasma technology. During the treatment process, normal pressure DC glow discharge is adopted, the discharge power is 100W, the plate spacing is 3mm, the treatment speed is 70mm / min, the treatment time is 3min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:3ml / min, and the pretreated substrate fabric and pretreated silicone film are obtained respectively;

[0063] The organic silicon film is an organic silicon PDMS film with a thickness of 50 μm, purchased from Hangzhou Guini New Material Technology Co., Ltd.

[0064] S2. Use a roller pattern to apply polyurethane adhesive to the surface of the pre-treated substrate fabric, with an application amount of 10g / m 2 , forming, using a laser with a wavelength of 1064nm and a pulse energy of 0.5mJ to laser scan the surface of the adhesive layer to obtain a three-dimensional pretreated substrate fabric with a micropore array, and then attach a pretreated silicone film to the other side of the adhesive layer, and use upper and lower pressure rollers to heat and press, where the temperature of the upper pressure roller is 75°C to obtain a coated fabric.

[0065] The polyurethane adhesive was purchased from Wenzhou Guoshibang Polymer Materials Co., Ltd., model 5693 polyurethane adhesive;

[0066] Comparative Example 2

[0067] A process for preparing a film-coated fabric by peeling, comprising the following steps:

[0068] S1. Add 50 kg of polyether triol MN-500, 30 kg of polyether triol EP-330N, 1.6 kg of 4,4'-methylenebis(2-chloroaniline), 1.5 kg of homogenizing agent L2580, 8 kg of polyoxyethylene glycerol ether, 0.5 kg of dibutyltin dilaurate, and 5 kg of water into a mixing tank, stir at 40° C. for 20 min, add 40 kg of isocyanate prepolymer and continue stirring for 10-60 seconds to obtain an active adhesive layer;

[0069] The isocyanate prepolymer is an isocyanate prepolymer (9048-57-1), brand: domestic Hubei;

[0070] S2. Use roller pattern to glue the active adhesive layer to the surface of cotton nylon fabric, and the glue application amount is 10g / m 2 , forming, using a laser with a wavelength of 1064nm and a pulse energy of 0.5mJ to laser scan the surface of the bonding layer to obtain a three-dimensional pre-treated substrate fabric with a micropore array, and then attaching a silicone film to the other side of the bonding layer, using an upper pressing roller and a lower pressing roller to heat and press, wherein the temperature of the upper pressing roller is 75°C, to obtain a coated fabric;

[0071] The organic silicon film is an organic silicon PDMS film with a thickness of 50 μm, purchased from Hangzhou Guini New Material Technology Co., Ltd.

[0072] test

[0073] 1. Thermal insulation performance test

[0074] The coated fabric is sewn into a bag with a needle density of 9 needles / cm, and white duck down with a down content of 75% is filled into the bag. The bag opening is sewn completely to obtain a down bag with a size of 40cm×40cm and a down content of 50g, which is then tested for thermal insulation performance.

[0075] The fabrics prepared in Example 5 and Comparative Examples 1-2 were tested for thermal insulation properties of down bags using a YG606D flat-plate thermal insulation instrument. The specific test method is as follows:

[0076] After a blank test under constant temperature and humidity conditions, the sample is covered on the test plate and preheated for 30 minutes. After the preheating is completed, the instrument automatically enters the sample experiment to test the heat transfer coefficient, Crowe value and thermal insulation rate of various down bags. When the same sample is tested again, it is not necessary to preheat the sample.

[0077] Before starting each sample experiment, a blank experiment must be conducted to reduce experimental errors and make the experimental data more accurate. This experiment tested each type of down bag 5 times and took the average value as the final experimental result. The test results of heat transfer coefficient and thermal insulation rate are as follows: Figure 1 As shown, the results of the Crowe value test are as follows Figure 2shown.

[0078] 2. Air permeability and moisture permeability test

[0079] The air permeability of the products of Example 5 and Comparative Examples 1-2 was tested. During the test, the air permeability of the fabric was tested at different parts of the fabric and avoiding the edges and wrinkles of the fabric, with a pressure drop of 100 Pa and a test area of ​​20 cm. 2 , the test mode is automatic. Test different fabrics 5 times each, and take the average value as the final test result. The test results are as follows Figure 3 shown.

[0080] The products of Example 5 and Comparative Examples 1-2 were tested for moisture permeability. During the test, the moisture permeability test was carried out in accordance with GB / T12704.2-2009 "Test method for moisture permeability of textile fabrics - Part 2: Moisture absorption method". The test results are as follows: Figure 3 shown.

[0081] 3. Tensile performance test

[0082] The tensile properties of the products of Example 5 and Comparative Examples 1-2 were tested. During the test, the fabric was humidified for 24 hours under standard atmospheric conditions, and then the tensile properties of the fabric were tested using a YG026D electronic strength tester, where the test clamp distance was set to 10 mm and the tensile speed was 50 mm / min. The average value of 5 groups was taken for each fabric as the final test result, and the test results are shown in Table 1.

[0083] Test items Example 5 Comparative Example 1 Comparative Example 2 Breaking strength, N 384.1 375.6 341.3 Elongation at break, % 5.2 6.1 11.6

[0084] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A process for preparing a film-coated fabric by peeling, characterized in that: The steps include: S1. Add 40-60 parts of polyether triol MN-500, 20-40 parts of polyether triol EP-330N, 1-2 parts of 4,4'-methylenebis(2-chloroaniline), 1-2 parts of foaming agent, 5-12 parts of polyoxyethylene glycerol ether, 0.1-1 parts of catalyst, and 1-10 parts of water to a mixing tank by weight, stir at a temperature of 30-50° C., add 20-60 parts of isocyanate prepolymer and continue stirring for 10-60 seconds to obtain an active adhesive layer; S2, treating the substrate fabric and the organosilicon film respectively by plasma technology, during which normal pressure direct current glow discharge is used to obtain pre-treated substrate fabric and pre-treated organosilicon film respectively; S3, applying the active adhesive layer to the surface of the pretreated substrate fabric by roller patterning, forming, laser scanning the surface of the adhesive layer by laser, obtaining a three-dimensional pretreated substrate fabric with a micropore array, and then attaching a pretreated organic silicone film to the other side of the adhesive layer, heating and pressing with an upper pressing roller and a lower pressing roller, wherein the temperature of the upper pressing roller is 70-80° C., to obtain a coated fabric; The foaming agent is foaming agent L2580; In S2, during the discharge process, the discharge power is 85-110W, the plate spacing is 2-4mm, the processing speed is 60-80mm / min, the processing time is 2-4min, the working gas includes helium and oxygen, and the flow ratio of helium to oxygen is 10:1-4ml / min; The isocyanate group of the isocyanate prepolymer reacts with water to generate urea bonds and carbon dioxide, and is combined with the foaming agent L2580 and polyoxyethylene glycerol ether to form an active adhesive layer.

2. The process for preparing the film-coated fabric by peeling method according to claim 1 is characterized in that: In S1, the catalyst is dibutyltin dilaurate.

3. The process for preparing the film-coated fabric by peeling method according to claim 1 is characterized in that: In S2, the organic silicon film is an organic silicon PDMS film with a thickness of 50 μm.

4. The process for preparing the film-coated fabric by peeling method according to claim 1 is characterized in that: In S2, the base fabric is one of polyester, nylon and cotton.

5. The process for preparing the film-coated fabric by peeling method according to claim 1 is characterized in that: In S3, the amount of sizing applied to the surface of the pre-treated substrate fabric is 5-12 g / m 2 .

6. The process for preparing the film-coated fabric by peeling method according to claim 1, characterized in that: In S3, the wavelength of the laser is 1064nm and the pulse energy is 0.5mJ.

7. A coated fabric, characterized in that: The laminated fabric is made by adopting the process for preparing the laminated fabric by peeling as described in any one of claims 1 to 6.

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