PET (Polyethylene Terephthalate) organic silicon leather and preparation process thereof

Abstract

The invention relates to the technical field of organic silicon leather, in particular to PET organic silicon leather and a production process. The PET organic silicon leather comprises a PET substrate, an organic silicon adhesive and liquid silica gel; the organic silicon adhesive is prepared from the following components in parts by weight: 5 to 10 parts of hydrogen-containing polysiloxane, 3 to 8 parts of vinyl polysiloxane, 2 to 5 parts of dimethyl dichlorosilane, 1 to 3 parts of cyclosiloxane and 0.2 to 0.5 part of a platinum catalyst. The liquid silica gel is prepared from the following components in parts by weight: 5 to 10 parts of a silica polymer consisting of disiloxane, 5 to 10 parts of polyether modified polydimethylsiloxane, 3 to 5 parts of polysiloxane, 2 to 6 parts of triethoxysilane, 0.1 to 0.4 part of a low-boiling-point mixture, 0.08 to 0.16 part of a platinum vulcanizing agent, 0.002 to 0.005 part of a tackifier, 0.002 to 0.005 part of an antistatic agent, 0.01 to 0.03 part of fluff powder, 0.008 to 0.01 part of extinction powder and 0.002 to 0.005 part of a dispersing agent. The PET organic silicon leather provided by the invention is a leather product composed of PET as a substrate and silica gel as a surface layer, and can pass 100 DEG C water boiling for one hundred hours, aging resistance and various environmental protection tests.

Description

Technical Field

[0001] The invention relates to the technical field of organosilicon leather, and in particular to PET organosilicon leather and a preparation process thereof. Background Art

[0002] Traditional leather materials have problems such as being environmentally unfriendly, high production costs, and complex processing. With the improvement of environmental awareness and the development of new material technologies, the market demand for new leather materials that are environmentally friendly, durable, and easy to process is growing. As a new type of environmentally friendly leather material, PET silicone leather has attracted attention due to its excellent physical properties. 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 high temperature resistant, anti-aging, environmentally friendly PET silicone leather and a production process.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] PET silicone leather, which includes PET substrate, silicone adhesive and liquid silicone;

[0006] The organic silicone adhesive comprises 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 platinum catalyst;

[0007] 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 vulcanizer, 0.002-0.005 parts of tackifier, 0.002-0.005 parts of antistatic agent, 0.002-0.005 parts of fluff powder, 0.01-0.03 parts of matting powder, 0.008-0.01 parts of dispersant.

[0008] Preferably, the PET silicone leather comprises a PET substrate, a silicone adhesive and liquid silicone; the 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 a platinum catalyst; the liquid silicone comprises 5 parts of a silicone-oxygen polymer composed of disiloxane, 5 parts of polyether-modified polydimethylsiloxane, 3 parts of polysiloxane, 2 parts of triethoxysilane, 0.2 parts of a low-boiling mixture, 0.08 parts of a platinum vulcanizer, 0.002 parts of a tackifier, 0.002 parts of an antistatic agent, 0.01 parts of a fluff powder, 0.008 parts of a matting powder and 0.002 parts of a dispersant.

[0009] Preferably, the organic silicone adhesive also includes 0.1-0.3 parts of cyclic polyolefins. Cyclic polyolefins can improve hydrogen-containing polysiloxanes, form uniform nano cage structures, improve the heat resistance and flame retardancy of organic silicone adhesives, and significantly improve the thermal stability of organic silicone adhesives. 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, and have better flexibility and heat resistance. Materials are particularly suitable for applications in high temperature environments. Cyclic polyolefins can improve dimethyldichlorosilane to improve the hydrophobicity of materials and improve the waterproof and antifouling functions of products. 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 further comprises 0.1-0.5 parts of butyl acrylate and 0.3-0.8 parts of methyl methacrylate. The introduction of butyl acrylate, combined with polysiloxane, can significantly improve the heat resistance, UV shielding and chemical resistance of the liquid silicone, making the PET silicone leather have better heat resistance and anti-aging properties. The introduction of methyl methacrylate, combined with triethoxysilane, can improve the adhesion between the liquid silicone and the PET substrate, and improve its adhesion and durability.

[0011] Preferably, the liquid silica gel also includes 0.001 parts of rare earth cerium. Rare earth cerium materials have good oxygen storage-release capacity, can eliminate volatile organic pollutants (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, the model is: brand number TNA-25PS, purchased from Dongguan Tianan 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 a brand name of 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 process steps:

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

[0021] S2: After curing at 130℃-150℃ for 5-8 minutes, cool down;

[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, and 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 comprises the following process steps:

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

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

[0028] S3: Use release paper as the carrier, adjust the gap to 50 microns with a comma knife, evenly coat the liquid silicone on the release paper, and after 80℃ for 2 minutes, reach the semi-vulcanized state, and then cover it on 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 fully vulcanize;

[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 comprises a PET substrate, 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 dimethyldichlorosilane, 1-3 parts of cyclosiloxane and 0.2-0.5 parts of a platinum catalyst; the liquid silicone comprises 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 vulcanizer, 0.002-0.005 parts of a tackifier, 0.002-0.005 parts of an antistatic agent, 0.01-0.03 parts of a fluff powder, 0.008-0.01 parts of a matting powder and 0.002-0.005 parts of a dispersant.

[0034] The PET organic silicon 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 grids boiled in 100° C. water for 1 hour, anti-aging and various environmental protection tests. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0036] Example 1

[0037] PET silicone leather comprises a PET substrate, a silicone adhesive and liquid silicone; the silicone adhesive comprises 5 parts of hydrogen-containing 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 comprises 8 parts of a silicone-oxygen polymer composed of disiloxane, 5 parts of polyether-modified polydimethylsiloxane, 3 parts of polysiloxane, 5 parts of triethoxysilane, 0.1 parts 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 fluff 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 to evenly apply the silicone adhesive on the PET substrate by rotating the scraper, reaching 25g of silicone adhesive per square;

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

[0041] S3: Use release paper as the carrier, adjust the gap to 50 microns with a comma knife, evenly coat the liquid silicone on the release paper, and after 80℃ for 2 minutes, reach the semi-vulcanized state, and then cover it on 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 fully vulcanize;

[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, comprising PET substrate, silicone adhesive and liquid silicone; the silicone adhesive comprises 6 parts of hydrogenated polysiloxane, 8 parts of vinyl polysiloxane, 3 parts of dimethyldichlorosilane, 2 parts of cyclosiloxane, 0.4 parts of platinum catalyst and 0.2 parts of cyclic polyolefin; the liquid silicone comprises 6 parts of silicone-oxygen polymer composed of disiloxane, 9 parts of polyether-modified polydimethylsiloxane, 5 parts of polysiloxane, 2 parts of triethoxysilane, 0.2 parts of low boiling point mixture, 0.14 parts of platinum vulcanizer, 0.004 parts of tackifier, 0.002 parts of antistatic agent, 0.02 parts of fluff powder, 0.009 parts of matting powder, 0.004 parts of 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 to evenly apply the silicone adhesive on the PET substrate by rotating the scraper, reaching 25g of silicone adhesive per square;

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

[0050] S3: Use release paper as the carrier, adjust the gap to 50 microns with a comma knife, evenly coat the liquid silicone on the release paper, and after 85℃ for 3 minutes, reach the semi-vulcanized state, and then cover it on 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 fully vulcanize;

[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 comprises a PET substrate, a silicone adhesive and liquid silicone; the silicone adhesive comprises 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 comprises 9 parts of a silicone-oxygen 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 fluff 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 to evenly apply the silicone adhesive on the PET substrate by rotating the scraper, reaching 25g of silicone adhesive per square;

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

[0059] S3: Use release paper as the carrier, adjust the gap to 50 microns with a comma knife, evenly coat the liquid silicone on the release paper, and after 90℃ for 2.5 minutes, reach the semi-vulcanized state, and then cover it on 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 fully vulcanize;

[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 comprises a PET substrate, a silicone adhesive and liquid silicone; the silicone adhesive comprises 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 comprises 7 parts of a silicone-oxygen 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 fluff 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 to evenly apply the silicone adhesive on the PET substrate by rotating the scraper, reaching 25g of silicone adhesive per square;

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

[0068] S3: Use release paper as the carrier, adjust the gap to 50 microns with a comma knife, evenly coat the liquid silicone on the release paper, and after 80℃ for 2 minutes, reach the semi-vulcanized state, and then cover it on 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 fully vulcanize;

[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 comprises a PET substrate, a silicone adhesive and liquid silicone; the silicone adhesive comprises 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 comprises 5 parts of silicone-oxygen 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 vulcanizer, 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 to evenly apply the silicone adhesive on the PET substrate by rotating the scraper, reaching 25g of silicone adhesive per square;

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

[0077] S3: Use release paper as the carrier, adjust the gap to 50 microns with a comma knife, evenly coat the liquid silicone on the release paper, and after 80℃ for 2 minutes, reach the semi-vulcanized state, and then cover it on 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 fully vulcanize;

[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 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. PET silicone leather, characterized by: It includes PET substrate, silicone adhesive and liquid silicone; The organic silicone adhesive comprises 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 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 vulcanizer, 0.002-0.005 parts of tackifier, 0.002-0.005 parts of antistatic agent, 0.002-0.005 parts of fluff powder, 0.01-0.03 parts of matting powder, 0.008-0.01 parts of dispersant.

2. The PET silicone leather according to claim 1, characterized in that: It includes PET substrate, silicone adhesive and liquid silicone; The organic silicone adhesive comprises 5 parts of hydrogen-containing polysiloxane, 3 parts of vinyl polysiloxane, 2 parts of dimethyldichlorosilane, 1 part of cyclosiloxane, and 0.2 parts of platinum catalyst; The liquid silicone includes 5 parts of silicone-oxygen 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 organic silicone adhesive also includes 0.1-0.3 parts of cyclic polyolefin.

4. The PET silicone leather according to claim 1, characterized in that: The liquid silicone further comprises 0.1-0.5 parts of butyl acrylate and 0.3-0.8 parts of methyl methacrylate.

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

6. The process for preparing the PET silicone 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: After curing at 130℃-150℃ for 5-8 minutes, cool down; 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: Press the PET substrate with a pressure wheel to shape it, and then bake it at 130℃-140℃ for 3-5 minutes to fully vulcanize it; 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.

7. The process for preparing PET silicone leather according to claim 6, characterized in that: It specifically includes the following process steps: S1: Use a 100-mesh double-engraved wheel to evenly apply the silicone adhesive on the PET substrate by rotating the scraper, reaching 25g of silicone adhesive per square; S2: After curing at 140°C for 5 minutes, cool naturally for 24 hours; S3: Use release paper as the carrier, adjust the gap to 50 microns with a comma knife, evenly coat the liquid silicone on the release paper, and after 80℃ for 2 minutes, reach the semi-vulcanized state, and then cover it on the PET substrate; S4: Use 80KG heavy round pressure wheel and 2.5KG cylinder pressure to press on the PET substrate to fix the shape, and then bake at 130℃ for 3 minutes to fully vulcanize; 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.

Images