High-performance organic silicon coating fabric and preparation method thereof

Abstract

The invention discloses a high-performance organosilicon coated fabric and a preparation method thereof, and belongs to the technical field of fabric function modification. The method comprises the following steps: preparing a silica gel top coating and a silica gel surface layer; the preparation method comprises the following steps: by taking release paper as a bearing medium, sequentially coating a top coating and a surface coating on the release paper, curing each coating into a film by adopting a layer-by-layer heating mode, and adhering the film with a fabric base material to form an organosilicon coating fabric semi-finished product; the obtained semi-finished product of the organic silicon coating fabric is subjected to vulcanization ripening treatment, and the high-performance organic silicon coating fabric is obtained. According to the invention, the organic silicon coating is adopted to replace the traditional single-function coating, and the organic silicon material has excellent hydrophobicity, antifouling property, mildew resistance and aging resistance, so that the finished fabric synchronously has the multiple excellent properties, coating superposition design does not need to be carried out for each performance short plate, and the problem of single function in the traditional technology is solved.

Description

Technical Field

[0001] This invention belongs to the field of fabric functional modification technology, specifically relating to a high-performance organosilicon-coated fabric and its preparation method. Background Technology

[0002] Traditional fabrics are favored by consumers for their flexibility in textile design, as well as their good breathability and comfort. However, the numerous micropores in traditional fabric fibers make them susceptible to external environmental interference during actual use. For example, spilled food such as coffee or cake can become embedded in the fibers, making them difficult to clean and leaving stains. Furthermore, they are more prone to moisture absorption in high-humidity environments, leading to mold growth and other problems. Currently, common methods for improving the stain and water resistance of fabric surfaces include:

[0003] 1. Through finishing techniques, the physical or chemical properties of the fiber surface are altered while preserving the fabric's feel. Various polymers or additives are added to the fabric surface, such as DWR (durable water repellency) fluoropolymers or other hydrophobic polymers, and antibacterial and deodorizing additives containing silver ions or quaternary ammonium salts. However, these coatings are only functional in terms of protection, and their function gradually weakens with washing and wear.

[0004] 2. By using coating or lamination techniques, additional coatings or film layers are added to the surface of the fabric. For example, to solve the problem of non-waterproof / non-leakage, an additional waterproof coating is usually added. Common coating materials are often PU / PVC, etc. However, these coatings all have aging problems in terms of stain resistance and anti-aging properties. At the same time, some coatings have poor transparency, which makes it impossible to maintain the good appearance design of the fabric.

[0005] Both of the above methods have obvious limitations. Therefore, it is necessary to develop a new fabric that can ensure functional durability, bring about a significant improvement in other properties, and is easy to process. Summary of the Invention

[0006] The technical problem to be solved by this invention is to provide a method for preparing high-performance silicone-coated fabrics. This method uses silicone coatings to replace traditional single-function coatings. Silicone materials themselves have excellent hydrophobicity, stain resistance, mildew resistance, and aging resistance, so that the finished fabrics simultaneously possess the above-mentioned multiple excellent properties. There is no need to design coatings to address each performance deficiency, thus solving the problem of single function in traditional technologies. Another technical problem to be solved by this invention is to provide a high-performance silicone-coated fabric that combines design flexibility, comfort, and multiple protective properties. It can be widely used in outdoor clothing, home decoration, automotive interiors, medical protective equipment, and other fields, with broad market prospects.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A method for preparing a high-performance silicone-coated fabric includes the following steps:

[0009] 1) Prepare a silicone top coating and a top coating; the silicone top coating and the top coating are liquid silicone rubbers, which are mixed evenly by vacuum stirring;

[0010] 2) Using release paper as a carrier medium, the top coating and top coating prepared in step 1) are coated sequentially on the release paper. Each coating is cured into a film by heating layer by layer and then bonded to the fabric substrate to form a semi-finished product of silicone-coated fabric.

[0011] 3) The semi-finished product of silicone-coated fabric obtained in step 2) is subjected to vulcanization and aging treatment to obtain high-performance silicone-coated fabric.

[0012] Furthermore, in step 1), the process parameters for vacuum stirring are: vacuum degree -0.09MPa, dispersion speed 80rpm, main body speed 20rpm, and dispersion time 40min.

[0013] Furthermore, in step 1), the main body temperature of the liquid silicone rubber during the vacuum stirring process is controlled below 40°C.

[0014] Furthermore, in step 2), the heating and curing temperature of the top coating is 110~130℃, and the heating and curing time is 2~4min.

[0015] Furthermore, in step 2), the heating and curing temperature of the topcoat is 110~120℃, and the heating and curing time is 3~5min.

[0016] Furthermore, in step 3), the vulcanization and maturation process parameters are: vulcanization temperature 80~90℃, vulcanization and maturation time 16~24h.

[0017] Furthermore, the silicone-coated fabric prepared by the aforementioned method is a silicone-coated fabric.

[0018] Furthermore, the light aging resistance is level 4-5, and the surface stain resistance is level 4-5.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) The present invention uses an organosilicon coating to replace the traditional single-function coating. The organosilicon material itself has excellent hydrophobicity, stain resistance, mildew resistance and aging resistance, so that the finished fabric has multiple excellent properties at the same time. There is no need to design coating superposition for each performance shortcoming, which solves the problem of single function of traditional technology.

[0021] (2) The integrated process of preparing coating by vacuum stirring, heating and curing layer by layer and vulcanization and maturation enables the silicone coating to form a firm bond with the fabric substrate, avoiding the defect of easy loss of functional components in traditional finishing technology, and ensuring that the anti-fouling and waterproof properties of the fabric can remain stable after multiple washes and long-term use.

[0022] (3) The present invention adopts a "dry" coating process similar to traditional artificial leather. The process is simple, the key process parameters are clear, no complicated equipment or special operation is required, and it is easy to achieve large-scale production and reduce production costs. The finished fabric has design flexibility, comfort and multiple protective properties. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the fabric prepared in this application. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0025] Figure 1 The structure diagram of the fabric prepared in this application is shown. The top coating and the top coating are applied to the fabric layer in sequence.

[0026] Example 1

[0027] A method for preparing a high-performance silicone-coated fabric includes the following steps:

[0028] 1) Select 100% liquid silicone rubber based on a platinum catalytic system as raw material, put it into a vacuum stirring device, set the vacuum degree to -0.09MPa, the dispersion speed to 80rpm, the main body speed to 20rpm, and disperse and stir for 40min; monitor the raw material temperature in real time during the stirring process to ensure that the main body temperature of the liquid silicone rubber does not exceed 40℃, so as to obtain a uniform top coating and top coating.

[0029] 2) Using release paper as the carrier medium, firstly, a top coating is evenly coated on the release paper and then placed in a heating device and heated at 110°C for 4 minutes to cure the top coating into a film; then, a top coating is coated on the surface of the top coating and heated at 110°C for 5 minutes to cure the top coating into a film, and then tightly bonded to the pre-prepared cotton fabric substrate to form a semi-finished product of silicone-coated fabric.

[0030] 3) Place the semi-finished silicone-coated fabric in a constant temperature oven, set the temperature to 80℃, and vulcanize for 16 hours. After removing it, cool it to room temperature to obtain a high-performance silicone-coated fabric.

[0031] Example 2

[0032] A method for preparing a high-performance silicone-coated fabric includes the following steps:

[0033] The difference from Example 1 is that in step 2), a top coating is uniformly coated on the release paper and sent into a heating device to be heated at 120°C for 3 minutes to cure the top coating into a film; then a top coating is coated on the surface of the top coating and heated at 110°C for 4 minutes to cure the top coating into a film, and then tightly bonded to the pre-prepared cotton fabric substrate to form a semi-finished product of silicone-coated fabric.

[0034] 3) Place the semi-finished silicone-coated fabric in a constant temperature oven, set the temperature to 80℃, and vulcanize for 24 hours. After removing it, cool it to room temperature to obtain a high-performance silicone-coated fabric.

[0035] Example 3

[0036] A method for preparing a high-performance silicone-coated fabric includes the following steps:

[0037] The difference from Example 1 is that in step 2), a top coating is uniformly coated on the release paper and sent into a heating device to be heated at 130°C for 3 minutes to cure the top coating into a film; then a top coating is coated on the surface of the top coating and heated at 120°C for 4 minutes to cure the top coating into a film, and then tightly bonded to the pre-prepared cotton fabric substrate to form a semi-finished product of silicone-coated fabric.

[0038] 3) Place the semi-finished silicone-coated fabric in a constant temperature oven, set the temperature to 90℃, and vulcanize for 16 hours. After removing it, cool it to room temperature to obtain a high-performance silicone-coated fabric.

[0039] Example 4

[0040] A method for preparing a high-performance silicone-coated fabric includes the following steps:

[0041] The difference from Example 1 is that in step 2), a top coating is uniformly coated on the release paper and sent into a heating device to be heated at 130°C for 4 minutes to cure the top coating into a film; then a top coating is coated on the surface of the top coating and heated at 120°C for 5 minutes to cure the top coating into a film, and then tightly bonded to the pre-prepared cotton fabric substrate to form a semi-finished product of silicone-coated fabric.

[0042] 3) Place the semi-finished silicone-coated fabric in a constant temperature oven, set the temperature to 90℃, and vulcanize for 24 hours. After removing it, cool it to room temperature to obtain a high-performance silicone-coated fabric.

[0043] The silicone-coated fabrics prepared in Examples 1-4 were subjected to performance tests. The test standards and specific methods are shown in Table 1.

[0044] Table 1 Test Standards and Specific Procedures

[0045]

[0046] The results are shown in Table 2.

[0047] Table 2 Performance data of silicone-coated fabrics obtained in Examples 1-4

[0048]

[0049] As shown in Table 2, by modifying the fabric surface with a coating, the fabric can simultaneously meet multiple physical properties such as aging and stain resistance, giving it more functions than fabrics prepared using traditional techniques. Furthermore, the fabric maintains good appearance and stable physical properties even after repeated bending. Compared to other processes, manufacturers with conventional dry coating line capabilities can obtain samples with stable physical properties.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing a high-performance silicone-coated fabric, characterized in that: Includes the following steps: 1) Prepare a silicone top coating and a top coating; the silicone top coating and the top coating are liquid silicone rubbers, which are mixed evenly by vacuum stirring; 2) Using release paper as a carrier medium, the top coating and top coating prepared in step 1) are coated sequentially on the release paper. Each coating is cured into a film by heating layer by layer and then bonded to the fabric substrate to form a semi-finished product of silicone-coated fabric. 3) The semi-finished product of silicone-coated fabric obtained in step 2) is subjected to vulcanization and aging treatment to obtain high-performance silicone-coated fabric.

2. The method for preparing high-performance organosilicon-coated fabric according to claim 1, characterized in that: In step 1), the process parameters for vacuum stirring are: vacuum degree -0.09MPa, dispersion speed 80rpm, main body speed 20rpm, and dispersion time 40min.

3. The method for preparing high-performance organosilicon-coated fabric according to claim 1, characterized in that: In step 1), the main body temperature of the liquid silicone rubber during the vacuum stirring process is controlled below 40°C.

4. The method for preparing high-performance organosilicon-coated fabric according to claim 1, characterized in that: In step 2), the heating and curing temperature of the top coating is 110~130℃, and the heating and curing time is 2~4min.

5. The method for preparing high-performance organosilicon-coated fabric according to claim 1, characterized in that: In step 2), the heating and curing temperature of the topcoat is 110~120℃, and the heating and curing time is 3~5min.

6. The method for preparing high-performance organosilicon-coated fabric according to claim 1, characterized in that: In step 3), the vulcanization and maturation process parameters are: vulcanization temperature 80~90℃, vulcanization and maturation time 16~24h.

7. The silicone-coated fabric prepared by the method for preparing high-performance silicone-coated fabric according to any one of claims 1-6.

8. The high-performance silicone-coated fabric according to claim 7, characterized in that: The light aging resistance is level 4-5, and the surface stain resistance is level 4-5.

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