Pet silicone leather and preparation process thereof

Abstract

The present application relates to the technical field of silicone leather, and particularly relates to PET silicone leather and a production process; the PET silicone leather comprises a PET base material, a silicone adhesive and liquid silicone; the silicone adhesive comprises 5-10 parts of hydrogen-containing polysiloxane, 3-8 parts of vinyl polysiloxane, 2-5 parts of dimethyl dichlorosilane, 1-3 parts of cyclosiloxane and 0.2-0.5 parts of platinum gold catalyst; the liquid silicone comprises 5-10 parts of siloxane type polymer composed of binary siloxane, 5-10 parts of polyether type modified polydimethylsiloxane, 3-5 parts of polysiloxane, 2-6 parts of triethoxysilane, 0.1-0.4 parts of a low-boiling-point mixture, 0.08-0.16 parts of a platinum gold vulcanizing agent, 0.002-0.005 parts of an adhesion promoter, 0.002-0.005 parts of an antistatic agent, 0.01-0.03 parts of fluff powder, 0.008-0.01 parts of matting powder and 0.002-0.005 parts of a dispersing agent; the PET silicone leather of the present application is a leather product composed of a PET base material and a silicone surface layer, and can pass 100 DEG C water boiling for 1 hour, aging resistance and various environmental protection tests.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silicone leather, in particular to PET silicone leather and a preparation process thereof. BACKGROUND

[0002] Traditional leather materials have problems such as environmental unfriendliness, high production cost and complex processing. With the improvement of environmental awareness and the development of new material technology, the market demand for new leather materials that are environmentally friendly, durable and easy to process is increasing. PET silicone leather, as a new environmentally friendly leather material, has attracted attention due to its excellent physical properties. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide a PET silicone leather and a production process, which are resistant to high temperature, anti-aging and environmentally friendly.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] The PET silicone leather comprises a PET base material, a silicone adhesive and liquid silicone.

[0006] The silicone adhesive comprises 5-10 parts of hydrogen-containing polysiloxane, 3-8 parts of vinyl polysiloxane, 2-5 parts of dimethyl dichlorosilane, 1-3 parts of cyclosiloxane and 0.2-0.5 parts of platinum gold catalyst.

[0007] The liquid silicone comprises 5-10 parts of siloxane-type polymer composed of binary siloxane, 5-10 parts of polyether-type modified polydimethylsiloxane, 3-5 parts of polysiloxane, 2-6 parts of triethoxysilane, 0.1-0.4 parts of low-boiling-point mixture, 0.08-0.16 parts of platinum gold vulcanizing agent, 0.002-0.005 parts of tackifier, 0.002-0.005 parts of antistatic agent, 0.01-0.03 parts of fluff powder, 0.008-0.01 parts of matting powder and 0.002-0.005 parts of dispersing agent.

[0008] Preferably, the PET silicone leather comprises a PET base material, a silicone adhesive and liquid silicone; the silicone adhesive comprises 5 parts of hydrogen-containing polysiloxane, 3 parts of vinyl polysiloxane, 2 parts of dimethyl dichlorosilane, 1 part of cyclosiloxane and 0.2 parts of platinum gold catalyst; and the liquid silicone comprises 5 parts of siloxane-type polymer composed of binary siloxane, 5 parts of polyether-type modified polydimethylsiloxane, 3 parts of polysiloxane, 2 parts of triethoxysilane, 0.2 parts of low-boiling-point mixture, 0.08 parts of platinum gold vulcanizing agent, 0.002 parts of tackifier, 0.002 parts of antistatic agent, 0.01 parts of fluff powder, 0.008 parts of matting powder and 0.002 parts of dispersing agent.

[0009] Preferably, the organic silicone adhesive also includes 0.1-0.3 parts of cyclic polyolefins. Cyclic polyolefins can improve hydrogen-containing polysiloxanes, forming a uniform nanocage structure, improving the heat resistance and flame retardancy of the organic silicone adhesive, and significantly improving the thermal stability of the organic silicone adhesive. Cyclic polyolefins can improve the processing performance and high bonding performance of vinyl polysiloxanes. Organic silicone adhesives form high adhesion with PET substrates and liquid silicone rubber, and have better flexibility and heat resistance, making them particularly suitable for applications in high temperature environments. Cyclic polyolefins can improve dimethyldichlorosilane to improve the hydrophobicity of the material, thereby improving the waterproof and anti-fouling functions of the product. Cyclic siloxanes have good UV resistance, heat resistance, and ozone resistance. The addition of cyclic polyolefins can improve the mechanical strength and toughness of cyclosiloxanes, and improve the wear resistance and chemical corrosion resistance of cyclosiloxanes.

[0010] Preferably, the liquid silicone rubber also contains 0.1-0.5 parts butyl acrylate and 0.3-0.8 parts methyl methacrylate. The addition of butyl acrylate, combined with polysiloxane, significantly improves the liquid silicone's heat resistance, UV shielding, and chemical resistance, resulting in PET silicone leather with superior heat and aging resistance. The addition of methyl methacrylate, combined with triethoxysilane, improves the adhesion between the liquid silicone rubber and the PET substrate, enhancing its adhesion and durability.

[0011] Preferably, the liquid silica gel further comprises 0.001 parts of rare earth cerium. Rare earth cerium materials have good oxygen storage and release capacity, can eliminate volatile organic compounds (VOCs) in environmental pollutants, and make the product have good environmental performance.

[0012] Preferably, the platinum catalyst is a solvent-based platinum catalyst. The platinum catalyst is a chloroplatinic acid isopropanol solution, model: brand: TNA-25PS, purchased from Dongguan Tian'an Silica Gel Co., Ltd.

[0013] Preferably, the low boiling point mixture is a mixture of acetic acid solution and chitosan, preferably the low boiling point mixture is a mixture of acetic acid solution and chitosan in a ratio of 3:7-4:6.

[0014] Preferably, the tackifier is terpene-styrene resin, brand KH-792, purchased from Dongguan Dinghai Plastic Chemical Co., Ltd.

[0015] Preferably, the antistatic agent is made of chloride, silicone oil, polyvinyl alcohol and vinyl chloride, with the brand name K-595, and is purchased from Hangzhou Lin'an Dechang Electrostatic Technology Co., Ltd.

[0016] Preferably, the fluff powder is made of acrylic acid and polyurethane and is purchased from Shenzhen Xingsheng Pearlescent Chemical Pigment Co., Ltd.

[0017] Preferably, the matting powder is made of silicon dioxide, silicate and talc, and is purchased from Shenzhen Xingsheng Pearlescent Chemical Pigment Co., Ltd.

[0018] Preferably, the dispersant is casein, which is purchased from Guangdong Zhongtai Lianhua New Materials Co., Ltd.

[0019] The preparation process of PET silicone leather includes the following steps:

[0020] S1: Use a scraper to evenly apply the silicone adhesive on the PET substrate;

[0021] S2: Curing at 130-150°C for 5-8 minutes, followed by cooling;

[0022] S3: Use release paper as a carrier to evenly coat the liquid silicone on the release paper. After the temperature reaches 80℃-90℃ for 2-5 minutes, it reaches a semi-vulcanized state and then covers the PET substrate.

[0023] S4: Press the PET substrate with a pressure wheel to shape it, then bake it at 130℃-140℃ for 3-5 minutes to fully vulcanize it;

[0024] S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

[0025] Preferably, the preparation process of the PET silicone leather specifically includes the following process steps:

[0026] S1: Use a 100-mesh double-engraved wheel and scraper to evenly apply the silicone adhesive on the PET substrate, reaching 25g of silicone adhesive per square meter;

[0027] S2: After curing at 140°C for 5 minutes, cool naturally for 24 hours;

[0028] S3: Using release paper as the carrier, use a comma knife to adjust the gap to 50 microns, evenly apply liquid silicone on the release paper, heat it at 80℃ for 2 minutes to reach a semi-vulcanized state, and then cover it with the PET substrate;

[0029] S4: Use 80KG heavy round pressure wheel and 2.5KG cylinder pressure to press on the PET substrate to shape it.

[0030] Then bake at 130℃ for 3 minutes to complete the vulcanization;

[0031] S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

[0032] The beneficial effects of the present invention are:

[0033] PET silicone leather includes a PET substrate, an organic silicone adhesive and liquid silicone; the organic silicone adhesive includes 5-10 parts of hydrogen-containing polysiloxane, 3-8 parts of vinyl polysiloxane, 2-5 parts of dimethyldichlorosilane, 1-3 parts of cyclosiloxane, and 0.2-0.5 parts of a platinum catalyst; the liquid silicone includes 5-10 parts of a silicone-oxygen polymer composed of disiloxane, 5-10 parts of polyether-modified polydimethylsiloxane, 3-5 parts of polysiloxane, 2-6 parts of triethoxysilane, 0.1-0.4 parts of a low-boiling-point mixture, 0.08-0.16 parts of a platinum vulcanizing agent, 0.002-0.005 parts of a tackifier, 0.002-0.005 parts of an antistatic agent, 0.01-0.03 parts of a velvet powder, 0.008-0.01 parts of a matting powder, and 0.002-0.005 parts of a dispersant.

[0034] The PET organosilicon leather of the present invention is a leather product composed of PET as a base material and silicone as a surface layer, and can pass 100 grid tests, anti-aging tests, and various environmental protection tests by boiling in water at 100°C for one hour. DETAILED DESCRIPTION

[0035] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments. The contents mentioned in the embodiments are not intended to limit the present invention.

[0036] Example 1

[0037] PET silicone leather includes a PET substrate, an organic silicone adhesive and liquid silicone; the organic silicone adhesive includes 5 parts of hydrogenated polysiloxane, 4 parts of vinyl polysiloxane, 5 parts of dimethyldichlorosilane, 1 part of cyclosiloxane and 0.3 parts of a platinum catalyst; the liquid silicone includes 8 parts of a silicone-type polymer composed of disiloxane, 5 parts of polyether-modified polydimethylsiloxane, 3 parts of polysiloxane, 5 parts of triethoxysilane, 0.1 part of a low-boiling-point mixture, 0.08 parts of a platinum vulcanizer, 0.002 parts of a tackifier, 0.003 parts of an antistatic agent, 0.01 parts of a velvet powder, 0.008 parts of a matting powder and 0.003 parts of a dispersant.

[0038] The preparation process of the PET silicone leather of this embodiment specifically includes the following process steps:

[0039] S1: Use a 100-mesh double-engraved wheel and scraper to evenly apply the silicone adhesive on the PET substrate, reaching 25g of silicone adhesive per square meter;

[0040] S2: After curing at 140°C for 5 minutes, cool naturally for 24 hours;

[0041] S3: Using release paper as the carrier, use a comma knife to adjust the gap to 50 microns, evenly apply liquid silicone on the release paper, heat it at 80℃ for 2 minutes to reach a semi-vulcanized state, and then cover it with the PET substrate;

[0042] S4: Use 80KG heavy round pressure wheel and 2.5KG cylinder pressure to press on the PET substrate to shape it.

[0043] Then bake at 130℃ for 3 minutes to complete the vulcanization;

[0044] S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

[0045] Example 2

[0046] PET silicone leather comprises a PET substrate, a silicone adhesive, and liquid silicone. The silicone adhesive comprises 6 parts hydrogenated polysiloxane, 8 parts vinyl polysiloxane, 3 parts dimethyldichlorosilane, 2 parts cyclosiloxane, 0.4 parts platinum catalyst, and 0.2 parts cyclic polyolefin. The liquid silicone comprises 6 parts of a silicone-oxygen polymer composed of disiloxane, 9 parts polyether-modified polydimethylsiloxane, 5 parts polysiloxane, 2 parts triethoxysilane, 0.2 parts of a low-boiling-point mixture, 0.14 parts of a platinum vulcanizing agent, 0.004 parts of a tackifier, 0.002 parts of an antistatic agent, 0.02 parts of a velvet powder, 0.009 parts of a matting agent, 0.004 parts of a dispersant, and 0.001 parts of rare earth cerium. The low-boiling-point mixture is a mixture of acetic acid solution and chitosan in a ratio of 3:7.

[0047] The preparation process of the PET silicone leather of this embodiment specifically includes the following process steps:

[0048] S1: Use a 100-mesh double-engraved wheel and scraper to evenly apply the silicone adhesive on the PET substrate, reaching 25g of silicone adhesive per square meter;

[0049] S2: After curing at 130°C for 6 minutes, it is naturally cooled for 24 hours;

[0050] S3: Using release paper as the carrier, use a comma knife to adjust the gap to 50 microns, evenly apply liquid silicone on the release paper, heat it at 85℃ for 3 minutes until it reaches a semi-vulcanized state, and then cover it with the PET substrate;

[0051] S4: Use 80KG heavy round pressure wheel and 2.5KG cylinder pressure to press on the PET substrate to shape it.

[0052] Then bake at 130℃ for 3 minutes to complete the vulcanization;

[0053] S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

[0054] Example 3

[0055] PET silicone leather includes a PET substrate, an organic silicone adhesive and liquid silicone; the organic silicone adhesive includes 8 parts of hydrogenated polysiloxane, 6 parts of vinyl polysiloxane, 2 parts of dimethyldichlorosilane, 3 parts of cyclosiloxane and 0.5 parts of a platinum catalyst; the liquid silicone includes 9 parts of a silicone-type polymer composed of disiloxane, 8 parts of polyether-modified polydimethylsiloxane, 4 parts of polysiloxane, 6 parts of triethoxysilane, 0.4 parts of a low-boiling-point mixture, 0.16 parts of a platinum vulcanizer, 0.003 parts of a tackifier, 0.004 parts of an antistatic agent, 0.03 parts of a velvet powder, 0.01 parts of a matting powder, 0.002 parts of a dispersant, 0.001 parts of rare earth cerium, 0.3 parts of butyl acrylate and 0.5 parts of methyl methacrylate.

[0056] The preparation process of the PET silicone leather of this embodiment specifically includes the following process steps:

[0057] S1: Use a 100-mesh double-engraved wheel and scraper to evenly apply the silicone adhesive on the PET substrate, reaching 25g of silicone adhesive per square meter;

[0058] S2: After curing at 145°C for 6 minutes, cool naturally for 24 hours;

[0059] S3: Using release paper as the carrier, use a comma knife to adjust the gap to 50 microns, evenly apply liquid silicone on the release paper, heat it at 90℃ for 2.5 minutes until it reaches a semi-vulcanized state, and then cover it with the PET substrate;

[0060] S4: Use 80KG heavy round pressure wheel and 2.5KG cylinder pressure to press on the PET substrate to shape it.

[0061] Then bake at 135℃ for 4 minutes to complete the vulcanization;

[0062] S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

[0063] Example 4

[0064] PET silicone leather includes a PET substrate, an organic silicone adhesive and liquid silicone; the organic silicone adhesive includes 9 parts of hydrogenated polysiloxane, 5 parts of vinyl polysiloxane, 4 parts of dimethyldichlorosilane, 2 parts of cyclosiloxane and 0.4 parts of a platinum catalyst; the liquid silicone includes 7 parts of a silicone-type polymer composed of disiloxane, 7 parts of polyether-modified polydimethylsiloxane, 3 parts of polysiloxane, 3 parts of triethoxysilane, 0.3 parts of a low-boiling-point mixture, 0.12 parts of a platinum vulcanizer, 0.005 parts of a tackifier, 0.005 parts of an antistatic agent, 0.02 parts of a velvet powder, 0.009 parts of a matting powder, 0.005 parts of a dispersant, 0.1 parts of butyl acrylate and 0.8 parts of methyl methacrylate.

[0065] The preparation process of the PET silicone leather of this embodiment specifically includes the following process steps:

[0066] S1: Use a 100-mesh double-engraved wheel and scraper to evenly apply the silicone adhesive on the PET substrate, reaching 25g of silicone adhesive per square meter;

[0067] S2: After curing at 140°C for 5 minutes, cool naturally for 24 hours;

[0068] S3: Using release paper as the carrier, use a comma knife to adjust the gap to 50 microns, evenly apply liquid silicone on the release paper, heat it at 80℃ for 2 minutes to reach a semi-vulcanized state, and then cover it with the PET substrate;

[0069] S4: Use 80KG heavy round pressure wheel and 2.5KG cylinder pressure to press on the PET substrate to shape it.

[0070] Then bake at 130℃ for 3 minutes to complete the vulcanization;

[0071] S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

[0072] Example 5

[0073] PET silicone leather includes a PET substrate, an organic silicone adhesive and liquid silicone; the organic silicone adhesive includes 10 parts of hydrogen-containing polysiloxane, 3 parts of vinyl polysiloxane, 3 parts of dimethyldichlorosilane, 1 part of cyclosiloxane, 0.3 parts of platinum catalyst and 0.3 parts of cyclic polyolefin; the liquid silicone includes 5 parts of silicone-type polymer composed of disiloxane, 6 parts of polyether-modified polydimethylsiloxane, 5 parts of polysiloxane, 4 parts of triethoxysilane, 0.1 parts of low-boiling-point mixture, 0.1 parts of platinum vulcanizing agent, 0.002 parts of tackifier, 0.003 parts of antistatic agent, 0.01 parts of fluff powder, 0.008 parts of matting powder, 0.004 parts of dispersant, 0.5 parts of butyl acrylate, 0.3 parts of methyl methacrylate and 0.001 parts of rare earth cerium.

[0074] The preparation process of the PET silicone leather of this embodiment specifically includes the following process steps:

[0075] S1: Use a 100-mesh double-engraved wheel and scraper to evenly apply the silicone adhesive on the PET substrate, reaching 25g of silicone adhesive per square meter;

[0076] S2: After curing at 140°C for 5 minutes, cool naturally for 24 hours;

[0077] S3: Using release paper as the carrier, use a comma knife to adjust the gap to 50 microns, evenly apply liquid silicone on the release paper, heat it at 80℃ for 2 minutes to reach a semi-vulcanized state, and then cover it with the PET substrate;

[0078] S4: Use 80KG heavy round pressure wheel and 2.5KG cylinder pressure to press on the PET substrate to shape it.

[0079] Then bake at 130℃ for 3 minutes to complete the vulcanization;

[0080] S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

[0081] The test results of the PET silicone leather prepared in Examples 1-5 are as follows:

[0082]

[0083]

[0084] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the scope of protection of the present invention.

Claims

1. PET silicone leather, characterized by: It includes PET substrate, organic silicone adhesive and liquid silicone; The organic silicone adhesive comprises 5-10 parts of hydrogenated polysiloxane, 3-8 parts of vinyl polysiloxane, 2-5 parts of dimethyldichlorosilane, 1-3 parts of cyclosiloxane, and 0.2-0.5 parts of platinum catalyst; Liquid silicone includes 5-10 parts of silicone-oxygen polymer composed of disiloxane, 5-10 parts of polyether-modified polydimethylsiloxane, 3-5 parts of polysiloxane, 2-6 parts of triethoxysilane, 0.1-0.4 parts of low boiling point mixture, 0.08-0.16 parts of platinum vulcanizing agent, 0.002-0.005 parts of tackifier, 0.002-0.005 parts of antistatic agent, 0.01-0.03 parts of fluff powder, 0.008-0.01 parts of matting powder, and 0.002-0.005 parts of dispersant; The low boiling point mixture is a mixture of acetic acid solution and chitosan in a ratio of 3:7-4:6; The organic silicone adhesive further comprises 0.1-0.3 parts of cyclic polyolefin; The liquid silicone further comprises 0.1-0.5 parts of butyl acrylate and 0.3-0.8 parts of methyl methacrylate.

2. The PET silicone leather according to claim 1, characterized in that: It includes PET substrate, organic silicone adhesive and liquid silicone; The organic silicone adhesive comprises 5 parts of hydrogenated polysiloxane, 3 parts of vinyl polysiloxane, 2 parts of dimethyldichlorosilane, 1 part of cyclosiloxane, and 0.2 parts of platinum catalyst; Liquid silicone includes 5 parts of silicone polymer composed of disiloxane, 5 parts of polyether modified polydimethylsiloxane, 3 parts of polysiloxane, 2 parts of triethoxysilane, 0.2 parts of low boiling point mixture, 0.08 parts of platinum vulcanizer, 0.002 parts of tackifier, 0.002 parts of antistatic agent, 0.01 parts of fluff powder, 0.008 parts of matting powder, and 0.002 parts of dispersant.

3. The PET silicone leather according to claim 1, characterized in that: The platinum catalyst is a solvent-based platinum catalyst.

4. The process for preparing the PET organosilicon leather according to claim 1, characterized in that: The process steps include: S1: Use a scraper to evenly apply the silicone adhesive on the PET substrate; S2: Curing at 130-150°C for 5-8 minutes, followed by cooling; S3: Use release paper as a carrier to evenly coat the liquid silicone on the release paper. After the temperature reaches 80℃-90℃ for 2-5 minutes, it reaches a semi-vulcanized state and then covers the PET substrate. S4: Use a pressure wheel to press on the PET substrate to set the shape, and then bake at 130℃-140℃ for 3-5 minutes to complete vulcanization; S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

5. The process for preparing the PET organosilicon leather according to claim 4, characterized in that: It specifically includes the following process steps: S1: Use a 100-mesh double-engraved wheel and scraper to evenly apply the silicone adhesive on the PET substrate, reaching 25g of silicone adhesive per square meter; S2: After curing at 140°C for 5 minutes, cool naturally for 24 hours; S3: Using release paper as the carrier, use a comma knife to adjust the gap to 50 microns, evenly apply liquid silicone on the release paper, heat it at 80℃ for 2 minutes until it reaches a semi-vulcanized state, and then cover it on the PET substrate; S4: Use an 80KG heavy round pressure wheel and a 2.5KG cylinder pressure to press the PET substrate to shape it, then bake it at 130℃ for 3 minutes to complete the vulcanization; S5: After complete vulcanization, the release paper is separated from the PET substrate coated with liquid silicone by a reeling machine to obtain PET silicone leather.

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