Velvet silk-screen silica gel as well as preparation method and application thereof

Abstract

The invention relates to the technical field of silica gel, in particular to velvet silk-screen silica gel as well as a preparation method and application thereof. The velvet silk-screen silica gel comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 100: (2-5); each part of the component A comprises the following raw materials in parts by weight: 50-70 parts of vinyl matt finish base rubber, 10-15 parts of velvet powder and 5-10 parts of a cross-linking agent; and each part of the component B comprises the following raw materials in parts by weight: 70-80 parts of vinyl silicone oil, 10-12 parts of a platinum catalyst and 0.2-0.5 part of a silane coupling agent. The velvet silk-screen silica gel is good in velvet effect after being printed, has good washing resistance and dry and wet rubbing resistance, is not prone to the situation of velvet splashing in the silk-screen process, and facilitates reduction of dust pollution. The preparation method of the velvet silk-screen silica gel is simple in process, convenient to operate and control, high in production efficiency and beneficial to industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of silica gel, and in particular to velvety silk-screen silica gel and a preparation method and application thereof. Background Art

[0002] There are currently two main ways to create a suede effect on fabrics: one is to screen-print flocking slurry and then achieve the suede effect through electrostatic flocking; the other is to add foaming powder to the screen printing ink, and the foaming particles cause the surface to be uneven to produce a velvety effect. The first electrostatic flocking effect feels good, but the fine velvet during flocking pollutes the environment, and it is easy to produce hair loss during friction; the second looks like a velvety effect but does not feel as smooth as velvet. After screen printing with velvety screen printing silicone, there is a velvety and smooth feeling. Therefore, it is of great significance to develop velvety screen printing silicone with excellent performance, so that there is no dust pollution from velvet during the screen printing process, the effect after printing is strong, dry and silky, and has a long service life. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a velvety silk-screen printing silicone, which has a good velvety effect after printing, good water washability and dry and wet rubbing resistance, and is not prone to dust pollution by velvet during the silk-screen printing process.

[0004] Another object of the present invention is to provide a method for preparing velvety silk-screen printing silica gel, which has a simple process, is easy to operate and control, and is conducive to industrial production.

[0005] Another object of the present invention is to provide an application of velvety silk-screen printing silicone.

[0006] The object of the present invention is achieved by the following technical scheme: A velvety silk screen printing silica gel comprises component A and component B, wherein the weight ratio of component A to component B is 100:2-5; each portion of component A comprises the following raw materials by weight: 50-70 portions of vinyl matte base glue, 10-15 portions of velvety powder, and 5-10 portions of cross-linking agent; each portion of component B comprises the following raw materials by weight: 70-80 portions of vinyl silicone oil, 10-12 portions of platinum catalyst, and 0.2-0.5 portions of silane coupling agent. The effective platinum content of the platinum catalyst is 1000-3000ppm.

[0007] The velvet-feeling silica gel of the present invention is based on addition-type platinum-catalyzed liquid silica gel, and is compounded with raw materials such as vinyl matte base glue, velvet-feeling powder, and a cross-linking agent to prepare velvet-feeling silk-screen silica gel. The velvet-feeling silk-screen silica gel has a good velvet-feeling effect after printing, feels smooth and dry, has good water resistance and resistance to wet and dry rubbing, and is not prone to fluff splashing during the silk-screen printing process, which helps to reduce dust pollution.

[0008] Furthermore, each portion of the cross-linking agent comprises the following raw materials in parts by weight: 150-200 parts of low-hydrogen silicone oil and 1.5-2 parts of acetylene alcohol inhibitor. The hydrogen content of the low-hydrogen silicone oil is 0.1-1.0%.

[0009] Furthermore, the velvety silk-screen silicone also includes a color paste, and each portion of the color paste includes the following raw materials in parts by weight: 20-40 parts of color powder, 60-80 parts of vinyl silicone oil, and 0.05-1 part of silicone dispersant; the weight ratio of component A to the color paste is 100:15-20.

[0010] The present invention can adjust the color and addition amount of the color powder as needed, and can prepare velvety silk-screen silica gel of different colors by changing the color and dosage of the color paste, and can use different color pastes according to actual needs to diversify the color of the product and obtain a color-changing effect, which helps to improve the visual effect of the product appearance. The organosilicon dispersant can significantly reduce the surface tension of the liquid, effectively improve the wettability of the color powder, promote its dispersion in the color paste, and help to improve the thermal stability.

[0011] Furthermore, the method for preparing the color paste comprises the following steps: mixing color powder, vinyl silicone oil and organosilicon dispersant in proportion, and preparing the color paste after stirring and dispersing.

[0012] Furthermore, the preparation method of the velvet powder comprises the following steps:

[0013] A1. Disperse and mix silicon micropowder and vinyl silicone resin in a weight ratio of 1:2-4;

[0014] A2. The mixture obtained in step A1 is spray-dried, and then filtered to obtain velvety powder.

[0015] Furthermore, in the step A1, the particle size of the silicon powder is not greater than 30 μm, and the vinyl content in the vinyl silicone resin is 3-5%.

[0016] Furthermore, in step A2, velvet powders of different particle sizes are obtained by filtering and sieving, and velvet powders of three specifications with particle sizes of 5-10 μm, 10-18 μm and 25-30 μm are mixed evenly in a weight ratio of 0.8-1.2:1.8-2.2:2.8-3.2 to obtain velvet powder for use.

[0017] The present invention disperses silicon micropowder into vinyl silicone resin and spray-dries the silicon micropowder so that the vinyl silicone resin is coated on the surface of the silicon micropowder, and velvet powder with different particle sizes of silicon micropowder coated by silicone resin is obtained. By compounding velvet powders with different particle sizes, the velvet powder with a smaller particle size is embedded between adjacent velvet powders with a larger particle size, which helps to improve the film-forming property, water washing resistance and dry and wet rubbing resistance of the velvet silk-screen silicone.

[0018] Another object of the present invention is achieved by the following technical solution: The preparation method of the velvety silk-screen silicone comprises the following steps:

[0019] (1) mixing the matte vinyl base glue, velvet powder and cross-linking agent in proportion, stirring and dispersing in a vacuum, and filtering through a mesh to obtain component A;

[0020] (2) mixing vinyl silicone oil, platinum catalyst and silane coupling agent in proportion, stirring and dispersing, to prepare component B;

[0021] (3) Component A and component B are mixed evenly at a ratio of 100:2-5, or component A and component B are mixed evenly at a ratio of 100:2-5 and then the color paste is added to prepare a velvety silk-screen silicone;

[0022] Among them, steps (1) and (2) can be performed simultaneously or in a reversed order.

[0023] The present invention also provides an application of the velvety silk-screen printing silica gel, wherein the velvety silk-screen printing silica gel is silk-screen printed on the surface of clothing fabrics.

[0024] Furthermore, the application of the above-mentioned velvety silk-screen silicone comprises the following steps: taking a breathable fabric, laying it flat on a silk-screen printing platform, silk-screening elastic silicone on all or part of the breathable fabric to print out a pattern; then silk-screening velvety silk-screen silicone on the elastic silicone layer, and then drying it.

[0025] Furthermore, after silk-screen printing velvety silk-screen silicone on the elastic silicone layer, it is dried in an oven at a baking temperature of 100-120° C. for 2-10 minutes, and the process is completed after curing.

[0026] Furthermore, the breathable fabric is compositely positioned using a PET film or laid flat on a screen printing platform provided with a platen glue, and the elastic silicone is printed 2-5 times with a 100-mesh screen to print a flat pattern; and then the adjusted velvety silicone is printed twice with a 150-mesh screen, and then put into an oven for drying at 100° C.-120° C. The elastic silicone and velvety silicone of the present invention can be printed multiple times with a multi-color screen printer or a single-color screen printer, and screens with lines of different specifications can be made with 100-mesh and 150-mesh meshes.

[0027] The beneficial effects of the present invention are as follows: the velvet-feeling silk-screen silicone of the present invention adopts addition-type platinum-catalyzed liquid silicone as a basis, and vinyl matte base glue, velvet-feeling powder, cross-linking agent and other raw materials are compounded to prepare velvet-feeling silk-screen silicone. The velvet-feeling silk-screen silicone has a good velvety effect after printing, has good water washability and dry and wet rubbing resistance, and is not prone to fluff splashing during the silk-screen printing process, which helps to reduce dust pollution. The preparation method of the velvet-feeling silk-screen silicone has a simple process, is easy to operate and control, has high production efficiency, and is conducive to industrial production. The velvet-feeling silk-screen silicone is silk-screened on the surface of clothing fabrics, so that the velvet-feeling silk-screen silicone silk layer has a good feel, a high bonding strength with the fabric, and good water washability and dry and wet rubbing resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a diagram showing the state of the velvety silicone in Example 1 being silk-screened on the fabric.

[0029] Figure 2-4 This is a diagram showing the effects of silk-screening velvety silicone of different colors on different fabrics of the present invention. DETAILED DESCRIPTION

[0030] Example 1

[0031] In this embodiment, a velvety silk screen printing silica gel includes component A and component B, and the weight ratio of component A to component B is 100:4; each part of component A includes the following raw materials in parts by weight: 60 parts of vinyl matte base glue, 12 parts of velvety powder, and 7 parts of cross-linking agent; each part of component B includes the following raw materials in parts by weight: 75 parts of vinyl silicone oil, 11 parts of platinum catalyst, and 0.4 parts of silane coupling agent. The silane coupling agent is silane coupling agent KH560. The specification of the platinum catalyst is 1000ppm. The vinyl matte base glue adopts RG0188A matte base glue of Ruike Industrial Co., Ltd. The CAS No. of the vinyl silicone oil is 26710-23-6, and the molecular formula is C6H 16 OSi2.

[0032] Furthermore, each portion of the crosslinking agent comprises the following raw materials by weight: 180 portions of low hydrogen silicone oil and 1.6 portions of acetylene alcohol inhibitor. The acetylene alcohol inhibitor is 1-ethynyl cyclohexanol. The CAS No. of the low hydrogen silicone oil is 68037-59-2, and the molecular formula is C9H 28 O3Si4.

[0033] Furthermore, the velvety silk-screen printing silica gel also includes a color paste, and each portion of the color paste includes the following raw materials by weight: 30 portions of color powder, 70 portions of vinyl silicone oil, and 0.1 portions of organic silicon dispersant; the weight ratio of the component A to the color paste is 100:18. The organic silicon dispersant is Dow organic silicon OFX-193S. The color powder is titanium dioxide.

[0034] Furthermore, the method for preparing the color paste comprises the following steps: mixing color powder, vinyl silicone oil and organosilicon dispersant in proportion, and preparing the color paste after stirring and dispersing.

[0035] Furthermore, the preparation method of the velvet powder comprises the following steps:

[0036] A1. Disperse and mix silicon micropowder and methyl vinyl silicone resin in a weight ratio of 1:3; the particle size of the silicon micropowder is not greater than 30 μm, and the vinyl content of the methyl vinyl silicone resin is 3-5%;

[0037] A2, spray-dry the mixture obtained in step A1, and then filter the mixture through a sieve, and classify the mixture through the sieve to obtain velvet powders of different particle sizes, and mix velvet powders of three specifications with particle sizes of 5-10 μm, 10-18 μm, and 25-30 μm in a weight ratio of 1:2:3 to obtain velvet powder for use.

[0038] In this embodiment, the preparation method of the velvety silk-screen silicone comprises the following steps:

[0039] (1) mixing the matte vinyl base glue, velvet powder and cross-linking agent in proportion, stirring and dispersing in a vacuum, and filtering through a mesh to obtain component A;

[0040] (2) mixing vinyl silicone oil, platinum catalyst and silane coupling agent in proportion, stirring and dispersing, to prepare component B;

[0041] (3) Component A and component B are mixed evenly in a ratio of 100:4 and then the color paste is added to obtain a velvety silk-screen silicone of the desired color.

[0042] This embodiment also provides an application of the velvety silk-screen silicone gel, where the velvety silk-screen silicone gel is silk-screen printed on the surface of clothing fabrics.

[0043] Furthermore, the application of the velvet-feeling silk-screen silicone comprises the following steps: taking a breathable fabric, flattening it on a silk-screen printing platform, silk-screening elastic silicone on all or part of the breathable fabric to print out a pattern; then silk-screening velvet-feeling silk-screen silicone on the elastic silicone layer, and then drying it. The breathable fabric is a breathable fabric with an elongation of 520%; the elastic silicone is RG2666 elastic silicone from Ruike Industrial Co., Ltd.

[0044] Furthermore, the breathable fabric is flattened on a screen printing platform with a PET film composite positioning, and the elastic silicone is printed 4 times with a 100-mesh screen to print a flat pattern; then the adjusted velvet-feeling silicone is printed 2 times with a 150-mesh screen, and then put into an oven for drying. The elastic silicone and velvet-feeling silicone are screen printed using a multi-color screen printer.

[0045] Example 2

[0046] In this embodiment, a velvety silk-screen silicone comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 100:3; each portion of the component A comprises the following raw materials in parts by weight: 50 parts of vinyl matte base glue, 10 parts of velvety powder, and 5 parts of a cross-linking agent; each portion of the component B comprises the following raw materials in parts by weight: 70 parts of vinyl silicone oil, 10 parts of a platinum catalyst, and 0.2 parts of a silane coupling agent.

[0047] Furthermore, each portion of the cross-linking agent comprises the following raw materials in parts by weight: 160 parts of low-hydrogen silicone oil and 2 parts of acetylene alcohol inhibitor.

[0048] Furthermore, the velvety silk-screen silicone also includes a color paste, and each portion of the color paste includes the following raw materials in parts by weight: 20 parts of color powder, 60 parts of vinyl silicone oil, and 0.1 parts of silicone dispersant; the weight ratio of component A to the color paste is 100:20.

[0049] Furthermore, the method for preparing the color paste comprises the following steps: mixing color powder, vinyl silicone oil and organosilicon dispersant in proportion, and preparing the color paste after stirring and dispersing.

[0050] Furthermore, the preparation method of the velvet powder comprises the following steps:

[0051] A1. Disperse and mix silicon micropowder and vinyl silicone resin in a weight ratio of 1:2; the particle size of the silicon micropowder is not greater than 30 μm, and the vinyl content of the methyl vinyl silicone resin is 3-5%;

[0052] A2. Spray-dry the mixture obtained in step A1, and then filter through a sieve. Classify the mixture through the sieve to obtain velvet powders of different particle sizes. Take three specifications of velvet powders with particle sizes of 5-10 μm, 10-18 μm, and 25-30 μm, and mix them evenly in a weight ratio of 0.8:1.8:2.8 to obtain velvet powder for use.

[0053] In this embodiment, the preparation method of the velvety silk-screen silicone comprises the following steps:

[0054] (1) mixing the matte vinyl base glue, velvet powder and cross-linking agent in proportion, stirring and dispersing in a vacuum, and filtering through a mesh to obtain component A;

[0055] (2) mixing vinyl silicone oil, platinum catalyst and silane coupling agent in proportion, stirring and dispersing, to prepare component B;

[0056] (3) Component A and component B are mixed evenly in a ratio of 100:3 and then the color paste is added to obtain velvety silk-screen silicone of the desired color.

[0057] This embodiment also provides an application of the velvety silk-screen silicone gel, where the velvety silk-screen silicone gel is silk-screen printed on the surface of clothing fabrics.

[0058] Furthermore, the application of the above-mentioned velvety silk-screen silicone comprises the following steps: taking a breathable fabric, flattening it on a silk-screen printing platform, silk-screening elastic silicone on the breathable fabric to print out a pattern; then silk-screening the velvety silk-screen silicone on the elastic silicone layer, and drying it in an oven at a baking temperature of 100°C for 10 minutes to complete the curing.

[0059] The rest of the content of this embodiment is the same as that of Embodiment 1 and will not be described again here.

[0060] Example 3

[0061] In this embodiment, a velvety silk-screen silicone comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 100:5; each portion of the component A comprises the following raw materials in parts by weight: 70 parts of vinyl matte base glue, 15 parts of velvety powder, and 10 parts of a cross-linking agent; each portion of the component B comprises the following raw materials in parts by weight: 80 parts of vinyl silicone oil, 12 parts of a platinum catalyst, and 0.5 parts of a silane coupling agent.

[0062] Furthermore, each portion of the cross-linking agent comprises the following raw materials in parts by weight: 200 parts of low-hydrogen silicone oil and 2 parts of acetylene alcohol inhibitor.

[0063] Furthermore, the velvety silk-screen silicone also includes a color paste, and each portion of the color paste includes the following raw materials in parts by weight: 40 parts of color powder, 80 parts of vinyl silicone oil, and 1 part of silicone dispersant; the weight ratio of component A to the color paste is 100:15.

[0064] Furthermore, the method for preparing the color paste comprises the following steps: mixing color powder, vinyl silicone oil and organosilicon dispersant in proportion, and preparing the color paste after stirring and dispersing.

[0065] Furthermore, the preparation method of the velvet powder comprises the following steps:

[0066] A1. Disperse and mix silicon micropowder and methyl vinyl silicone resin in a weight ratio of 1:4; the particle size of the silicon micropowder is not greater than 30 μm, and the vinyl content of the methyl vinyl silicone resin is 3-5%;

[0067] A2. Spray-dry the mixture obtained in step A1, and then filter through a sieve. Classify the mixture through the sieve to obtain velvet powders of different particle sizes. Take three specifications of velvet powders with particle sizes of 5-10 μm, 10-18 μm, and 25-30 μm, and mix them evenly in a weight ratio of 1.2:2.2:3.2 to obtain velvet powder for use.

[0068] In this embodiment, the preparation method of the velvety silk-screen silicone comprises the following steps:

[0069] (1) mixing the matte vinyl base glue, velvet powder and cross-linking agent in proportion, stirring and dispersing in a vacuum, and filtering through a mesh to obtain component A;

[0070] (2) mixing vinyl silicone oil, platinum catalyst and silane coupling agent in proportion, stirring and dispersing, to prepare component B;

[0071] (3) Component A and component B are mixed evenly in a ratio of 100:5 and then the color paste is added to obtain velvety silk-screen silicone of the desired color.

[0072] This embodiment also provides an application of the velvety silk-screen silicone gel, where the velvety silk-screen silicone gel is silk-screen printed on the surface of clothing fabrics.

[0073] Furthermore, the application of the above-mentioned velvety silk-screen silicone comprises the following steps: taking a breathable fabric, flattening it on a silk-screen printing platform, silk-screening elastic silicone on the breathable fabric to print out a pattern; then silk-screening the velvety silk-screen silicone on the elastic silicone layer, and drying it in an oven at a baking temperature of 120°C for 10 minutes to complete the curing.

[0074] The rest of the content of this embodiment is the same as that of Embodiment 1 and will not be repeated here.

[0075] Example 4

[0076] In this embodiment, a velvety silk-screen silicone comprises component A and component B, wherein the weight ratio of component A to component B is 100:4; each portion of component A comprises the following raw materials in parts by weight: 60 parts of vinyl matte base glue, 12 parts of velvety powder, and 6 parts of cross-linking agent; each portion of component B comprises the following raw materials in parts by weight: 75 parts of vinyl silicone oil, 10 parts of platinum catalyst, and 0.4 parts of silane coupling agent.

[0077] Furthermore, the velvety silk-screen silicone also includes a color paste, and each portion of the color paste includes the following raw materials in parts by weight: 30 parts of color powder, 70 parts of vinyl silicone oil, and 0.2 parts of silicone dispersant; the weight ratio of component A to the color paste is 100:15.

[0078] Furthermore, the method for preparing the color paste comprises the following steps: mixing color powder, vinyl silicone oil and organosilicon dispersant in proportion, and preparing the color paste after stirring and dispersing.

[0079] Furthermore, the preparation method of the velvet powder comprises the following steps:

[0080] A1. Disperse and mix silicon micropowder and methyl vinyl silicone resin in a weight ratio of 1:3; the particle size of the silicon micropowder is not greater than 30 μm, and the vinyl content of the methyl vinyl silicone resin is 3-5%;

[0081] A2. The mixture obtained in step A1 is spray-dried, and then filtered through a sieve. The velvet powders of different particle sizes are obtained by grading through the sieve. Three specifications of velvet powders with particle sizes of 5-10 μm, 10-18 μm, and 25-30 μm are mixed evenly in a weight ratio of 1:2:3 to obtain velvet powder for use.

[0082] In this embodiment, the preparation method of the velvety silk-screen silicone comprises the following steps:

[0083] (1) mixing the matte vinyl base glue, velvet powder and cross-linking agent in proportion, stirring and dispersing in a vacuum, and filtering through a mesh to obtain component A;

[0084] (2) mixing vinyl silicone oil, platinum catalyst and silane coupling agent in proportion, stirring and dispersing, to prepare component B;

[0085] (3) Mix component A and component B in a ratio of 100:4 and then add the color paste.

[0086] The rest of the content of this embodiment is the same as that of Embodiment 1 and will not be described again here.

[0087] The velvety silk-screen silicone of Examples 1-4 is silk-screened on the surface of clothing fabrics. The breathable fabrics can be made of cotton, lycra fabrics, modal fabrics, spandex, polyester, lace fabrics, fiber fabrics, mesh fabrics, blended fabrics, and swimwear. The silk-screen effect of velvety silk-screen silicone is as follows: Figure 1-4 In this test, velvety silk-screen silicone was printed on the surface of Lycra fabric and the performance was measured respectively.

[0088] The velvet-feeling silk-screen silicone of Examples 1-4 was silk-screened on the surface of clothing fabrics, and harmful substance detection was performed: the harmful substance content of the velvet-feeling silk-screen silicone was measured to meet the OEKO TEX detection standard. The velvet-feeling silk-screen silicone layer was tested for feel: the smoothness of the velvet-feeling silk-screen silicone layer was evaluated by touching it with human hands, and it was soft, delicate and comfortable.

[0089] The velvety silk-screen silicone of Examples 1-4 was silk-screened on the surface of the clothing fabric. The velvety silk-screen silicone layer was not damaged or detached before washing, and the edges were not warped. A water washing test was conducted by adding laundry detergent to 60°C water for 20 times, each time for 1 hour, and drying was performed after each washing. After low-temperature tumble drying, the next washing was performed.

[0090] Place the flat sample of velvety silk-screen silicone layer on the padding of the dry and wet friction color fastness tester, fix it, and set the test standard value of 500 dry rubbing times. Use dry friction cloth to wrap the friction head and fix it on the friction head with the "friction head fastening ring". When fastening, make the warp direction of the friction cloth consistent with the running direction of the friction head. Start to rub the friction head reciprocating linear motion for 500 times and then stop automatically. After wiping, compare the wiped sample with the standard gray sample card to determine the level of dry rubbing.

[0091] Place the velvety silk-screen silicone layer sample flat on the padding of the dry and wet friction color fastness tester, fix it, and set the test standard value of 500 wet rubbing times. Soak the dry friction cloth in grade 3 water (refer to 8.1 in GB / T6151-97) and take it out. Squeeze it with a small liquid roller to moisten the friction cloth, and use the above dry rubbing method to do the wet friction test. After wiping, compare the wiped sample with the standard gray sample card to determine the wet rubbing grade.

[0092] The test results of water washability and wet and dry friction resistance are shown in the following table:

[0093]

[0094] The velvet-feel silk-screen silicone rubber of the present invention has a good velvet-feel effect after printing, feels soft and comfortable, has good water resistance and wet and dry rubbing resistance, and compared with the velvet material in the prior art, is not easy to shed and pill, and is not prone to velvet splashing during the silk-screen printing process, which helps to reduce dust pollution. The harmful substance content thereof meets the OEKO TEX testing standards, and can be designed into different colors and produce color-changing effects as needed, and has good application prospects.

[0095] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A velvety silk-screen silicone, characterized in that: The invention comprises component A and component B, wherein the weight ratio of component A to component B is 100:2-5; each part of component A comprises the following raw materials in parts by weight: 50-70 parts of vinyl matte base glue, 10-15 parts of velvet powder, and 5-10 parts of cross-linking agent; each part of component B comprises the following raw materials in parts by weight: 70-80 parts of vinyl silicone oil, 10-12 parts of platinum catalyst, and 0.2-0.5 parts of silane coupling agent.

2. The velvety silk-screen silicone according to claim 1, characterized in that: It also includes color paste, each portion of the color paste includes the following raw materials in parts by weight: 20-40 parts of color powder, 60-80 parts of vinyl silicone oil, and 0.05-1 part of organic silicon dispersant; the weight ratio of the A component to the color paste is 100:15-20.

3. The velvety silk screen printing silicone according to claim 2, characterized in that: The preparation method of the color paste comprises the following steps: mixing color powder, vinyl silicone oil and organic silicon dispersant in proportion, stirring and dispersing to obtain the color paste.

4. The velvety silk-screen silicone according to claim 1, characterized in that: The preparation method of the velvet powder comprises the following steps: A1. Disperse and mix silicon micropowder and vinyl silicone resin in a weight ratio of 1:2-4; A2. The mixture obtained in step A1 is spray-dried, and then filtered to obtain velvety powder.

5. The velvety silk-screen silicone according to claim 4, characterized in that: In the step A1, the particle size of the silicon powder is not greater than 30 μm, and the vinyl content in the vinyl silicone resin is 3-5%.

6. The velvety silk screen printing silica gel according to claim 4, characterized in that: In step A2, velvet powders of different particle sizes are obtained by filtering and sieving. Velvet powders of three specifications with particle sizes of 5-10 μm, 10-18 μm and 25-30 μm are taken and mixed evenly in a weight ratio of 0.8-1.2:1.8-2.2:2.8-3.2 to obtain velvet powder for use.

7. The velvety silk-screen silicone according to claim 1, characterized in that: Each portion of the cross-linking agent comprises the following raw materials in parts by weight: 150-200 parts of low hydrogen silicone oil and 1.5-2 parts of acetylene alcohol inhibitor.

8. A method for preparing the velvety screen printing silica gel according to any one of claims 1 to 7, characterized in that: The steps include: (1) mixing the matte vinyl base glue, velvet powder and cross-linking agent in proportion, stirring and dispersing in a vacuum, and filtering through a mesh to obtain component A; (2) mixing vinyl silicone oil, platinum catalyst and silane coupling agent in proportion, stirring and dispersing, to prepare component B; (3) Component A and component B are mixed evenly at a ratio of 100:2-5, or component A and component B are mixed evenly at a ratio of 100:2-5 and then the color paste is added to prepare a velvety silk-screen silicone; Among them, steps (1) and (2) can be performed simultaneously or in a reversed order.

9. The application of the velvety screen printing silicone as claimed in any one of claims 1 to 7, characterized in that: Silk-screen velvety silicone is printed on the surface of clothing fabrics.

10. The application of the velvety silk-screen silicone as claimed in claim 9, characterized in that: The method comprises the following steps: taking a breathable fabric, laying it flat on a screen printing platform, screen printing elastic silicone on the breathable fabric to print out a pattern; then screen printing velvet-feeling screen printing silicone on the elastic silicone layer, and then drying it.

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