Hot-pressure-resistant surface layer, automotive trim PVC leather and preparation method of automotive trim PVC leather

Abstract

The invention discloses hot-pressing-resistant surface layer automotive interior PVC leather and a preparation method of the automotive interior PVC leather. The hot-pressing-resistant surface layer automotive interior PVC leather is prepared from the following components: polyvinyl chloride, phthalate, calcium stearate, zinc stearate, calcium carbonate and a cross-linking agent. According to the present invention, the thermoplastic PVC is added with the cross-linking agent such as DCP, TAIC, dicyclopentadiene diformate or a composite cross-linking agent, such that the light cross-linked network structure is formed in the PVC molecular chain, such that the thermoplastic PVC is not easily softened and remodeled so as to achieve the hot pressure resistance effect;

Description

Technical Field

[0001] The invention relates to the technical field of heat-pressure resistant surface skin layers, in particular to a heat-pressure resistant surface skin layer, automobile interior PVC leather and a preparation method of the automobile interior PVC leather. Background Art

[0002] The existing automotive PVC leather has poor heat-pressing resistance. After the parts are coated and hot-pressed, the pattern on the PVC surface is easily lost and changed, causing defects in appearance.

[0003] The reason is that PVC leather is a thermoplastic elastomer with a linear molecular structure, which means that when heated, they soften or melt and can be molded into a certain shape. Once cooled, they harden and retain their shape, and this curing process is reversible.

[0004] Used on a large scale in car interiors, the pattern structure on the car's leather interior will eventually fail under the accompanying effects of high temperature and pressure, causing the pattern structure to disappear.

[0005] Therefore, there is still a need for a heat-pressure resistant surface layer, automotive interior PVC leather, and a method for preparing the automotive interior PVC leather to solve the above technical problems. Summary of the invention

[0006] The invention provides a heat-pressing resistant surface layer, automobile interior PVC leather and a preparation method of automobile interior PVC leather for solving the above problems.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] A heat-pressure resistant skin layer, comprising the following components:

[0009] Polyvinyl chloride, phthalates, calcium stearate, zinc stearate, calcium carbonate and crosslinking agent.

[0010] In one embodiment, the above components are calculated according to the following weight parts:

[0011] The polyvinyl chloride is 100 parts, the phthalate is 60-100 parts, the calcium stearate is 1-5 parts, the zinc stearate is 1-5 parts, the calcium carbonate is 3-15 parts, and the cross-linking agent is 1-10 parts.

[0012] In one embodiment, the polyvinyl chloride is PVC-SG1 produced by Shanghai Yuhang Industrial Co., Ltd.

[0013] In one embodiment, the phthalate ester is No. 131-11-3 produced by Shanghai Chuangli Group Co., Ltd.

[0014] In one embodiment, the cross-linking agent is triallyl isotrimer ester produced by Anhui Xiangyun Rubber & Plastic Co., Ltd.

[0015] A PVC leather for automobile interior decoration comprises any one of the heat-resistant skin layers described above, and a surface treatment agent layer located on the top of the skin layer, wherein the bottom of the heat-resistant skin layer is connected to a closed-cell foaming layer and an inner lining layer at the bottom.

[0016] In one embodiment, the inner lining layer and the closed-cell foam layer are connected by an adhesive, and the heat-pressure resistant skin layer and the closed-cell foam layer are connected by an adhesive.

[0017] A method for preparing PVC leather for automobile interior decoration, comprising:

[0018] The proportioned polyvinyl chloride, phthalate, calcium stearate, zinc stearate, calcium carbonate and cross-linking agent are mixed and stirred to form a raw material slurry.

[0019] The raw material slurry is coated on the base fabric to form a shape, and then separated from the base fabric to form a skin layer.

[0020] Then a closed-cell foaming layer is formed on the inner lining layer by glue.

[0021] A skin layer is bonded on top of the closed cell foam layer.

[0022] Glue is then applied to the top of the epidermis, which is then air-dried and embossed to form a patterned structure.

[0023] Compared with the prior art, the beneficial effects of the present invention include at least:

[0024] By adding crosslinking agents to polyvinyl chloride, phthalates, calcium stearate, zinc stearate, calcium carbonate, by adding crosslinking agents to the PVC formula and controlling the addition method and dosage of the crosslinking agents, crosslinking agents such as DCP, TAIC, dicyclopentadiene dicarboxylate or composite crosslinking agents, a slightly crosslinked network structure is formed in the PVC molecular chain, making the thermoplastic PVC less likely to soften and reshape, thereby achieving an anti-heat pressure effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the automotive interior PVC leather according to an embodiment of the present invention.

[0026] In the figure: 1. Surface treatment agent layer; 2. Heat-resistant skin layer; 3. Foaming layer; 4. Lining layer. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0028] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0029] Reference Figure 1 The present invention provides a heat-resistant skin layer 2, which is composed of the following components:

[0030] Polyvinyl chloride, phthalates, calcium stearate, zinc stearate, calcium carbonate and crosslinking agents. By adding crosslinking agents to the PVC formula and controlling the addition method and dosage of the crosslinking agents, such as DCPTAIC, dicyclopentadiene dicarboxylate or composite crosslinking agents, a slightly crosslinked network structure is formed in the PVC molecular chain, making the thermoplastic PVC less likely to soften and reshape, thereby achieving a heat-resistant effect.

[0031] Preferably, the above components are calculated in the following weight proportions: 100 parts of polyvinyl chloride, 60-100 parts of phthalate, 1-5 parts of calcium stearate, 1-5 parts of zinc stearate, 3-15 parts of calcium carbonate, and 1-10 parts of cross-linking agent. According to experimental tests, the heat-resistant skin layer 2 within this range of proportions can form an effective heat-resistant skin layer 2, and can ensure the pattern structure of the leather under high-intensity heat-pressure tests.

[0032] Preferably, the polyvinyl chloride is PVC-SG1 produced by Shanghai Yuhang Industrial Co., Ltd.

[0033] Preferably, the phthalate ester is No. 131-11-3 produced by Shanghai Chuangli Group Co., Ltd.

[0034] Preferably, the cross-linking agent is triallyl isotrimer ester produced by Anhui Xiangyun Rubber & Plastic Co., Ltd.

[0035] Another aspect of the present invention discloses a PVC leather for automobile interior decoration, comprising the heat-resistant skin layer 2 described in any one of the above items, and a surface treatment agent layer 1 located on the top of the skin layer, wherein the bottom of the heat-resistant skin layer 2 is connected to a closed-cell foaming layer 3 and an inner lining layer at the bottom. The top of the heat-resistant skin layer 2 is coated with the surface treatment agent layer 1, wherein the surface treatment layer can be glue.

[0036] Preferably, the inner lining layer and the closed-cell foam layer 3 are connected by an adhesive, and the heat-resistant skin layer 2 and the closed-cell foam layer 3 are connected by an adhesive, wherein the adhesive may be glue.

[0037] Another aspect of the present invention discloses a method for preparing automotive interior PVC leather, comprising:

[0038] The proportioned polyvinyl chloride, phthalate, calcium stearate, zinc stearate, calcium carbonate and crosslinking agent are mixed and stirred to form a raw material slurry. The raw materials are mixed and stirred by a gentle stirring device.

[0039] The raw material slurry is coated on the base fabric to form, and then separated from the base fabric to form a skin layer. The base fabric layer can be a layer of woven fabric structure, and the slurry is coated on the base fabric layer after mixing and stirring, and then air-dried and finally separated to form a skin layer.

[0040] Then, a closed-space foaming layer 3 is formed on the inner lining layer by glue. The inner lining layer is the bottom layer of the leather, and the closed-space foaming layer 3 is gradually formed on the top of the inner lining layer.

[0041] The skin layer is bonded to the top of the closed cell foam layer 3. Then, the closed cell foam layer 3 and the skin layer are closely attached to each other under the action of pressure.

[0042] Then glue is applied on the top of the epidermis, and after air drying, embossing is performed to form a pattern structure, and finally a car interior PVC leather that is resistant to heat and pressure deformation is formed.

[0043] Experimental tests have shown that the epidermis structure within this range has a higher resistance to heat and pressure, thus preventing the surface structure from losing its pattern structure during heat and pressure.

[0044] Embodiment 1:

[0045] According to the dense layer formula in Table 1-1, the heat-pressing resistant surface layer 2 and the automotive interior PVC leather are prepared:

[0046]

[0047] Table 1-1

[0048] The components of the above-mentioned embodiment 1 are mixed and stirred in the above-mentioned proportions to form a raw material slurry, which is then coated on the base cloth to form a slurry. The formed heat-pressure resistant skin layer 2 is then separated, and then glue is coated on the inner lining layer and a closed-cell foaming layer 3 is formed on the top of the inner lining layer. Then glue is coated on the closed-cell foaming layer 3, and finally the heat-pressure resistant skin layer 2 is attached to the glue, and glue is coated on the skin layer. After air-drying, embossing is performed to form a pattern structure, and finally a product 1 is formed.

[0049] Comparative Example 1:

[0050] According to the dense layer formula in Table 1-2, heat-pressing resistant surface layer and automotive interior PVC leather are prepared:

[0051]

[0052] Table 1-2

[0053] The components of the above-mentioned embodiment 1 are mixed and stirred in the above-mentioned proportions to form a raw material slurry, which is then coated on a base fabric to form a slurry. The formed heat-pressure resistant skin layer is then separated. Glue is then coated on the inner lining layer and a closed-cell foaming layer is formed on the top of the inner lining layer. Glue is then coated on the closed-cell foaming layer. Finally, the heat-pressure resistant skin layer is attached to the glue, and glue is coated on the skin layer. After air-drying, the slurry is embossed to form a pattern structure to finally form a product.

[0054] Comparative Example 2:

[0055] According to the dense layer formula in Table 1-3, heat-pressing resistant surface layer and automotive interior PVC leather are prepared:

[0056]

[0057] The components of the above-mentioned embodiment 1 are mixed and stirred in the above-mentioned proportions to form a raw material slurry, which is then coated on a base fabric to form a slurry. The formed heat-pressure resistant skin layer is then separated. Glue is then coated on the inner lining layer and a closed-cell foaming layer is formed on the top of the inner lining layer. Glue is then coated on the closed-cell foaming layer. Finally, the heat-pressure resistant skin layer is attached to the glue, and glue is coated on the skin layer. After air-drying, the slurry is embossed to form a pattern structure to finally form a product.

[0058] Performance Test:

[0059] 1. Taber wear resistance test

[0060] The products in the above embodiments and comparative examples were cut into the same size and placed on a Taber abrasion tester for testing. The samples were graded, with the highest grade being 5 and the standard passing requirement being 4.

[0061] 2. Bending resistance test

[0062] The products in the above-mentioned embodiments and comparative examples were cut into the same size and placed on a folding endurance tester for testing. The samples were graded, with the highest grade being 5 and the standard passing requirement being 4.

[0063] 3. Heat resistance and tensile resistance test

[0064] The products in the above-mentioned embodiment and comparative example were cut into the same size, stretched by 160% and fixed in size, and placed in an oven at 100° C. for 24 hours. The samples were rated to observe whether the patterns were broken or cracked.

[0065] Test items Wear-resistant Bending resistance Heat-resistant stretch Example 4.5 5 5 Comparative Example 1 3.5 3 3 Comparative Example 2 3 2 4

[0066] Through experimental verification, it is found that the heat-pressure resistant surface layer disclosed in the present invention has a high ability to resist heat-pressure deformation. When used in automobile leather interior, its pattern structure has a high ability to resist heat-pressure deformation.

[0067] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A heat-pressure resistant skin layer, characterized in that: It is composed of the following components: Polyvinyl chloride, phthalates, calcium stearate, zinc stearate, calcium carbonate and crosslinking agent.

2. The heat-pressure resistant skin layer according to claim 1, characterized in that: The above components are calculated according to the following weight parts: The polyvinyl chloride is 100 parts, the phthalate is 60-100 parts, the calcium stearate is 1-5 parts, the zinc stearate is 1-5 parts, the calcium carbonate is 3-15 parts, and the cross-linking agent is 1-10 parts.

3. The heat-pressure resistant skin layer according to claim 2, characterized in that: The polyvinyl chloride is PVC-SG1 produced by Shanghai Yuhang Industrial Co., Ltd.

4. The heat-pressure resistant skin layer according to claim 2, characterized in that: The phthalate ester is No. 131-11-3 produced by Shanghai Chuangli Group Co., Ltd.

5. The heat-pressure resistant skin layer according to claim 2, characterized in that: The cross-linking agent is triallyl isotrimer ester produced by Anhui Xiangyun Rubber & Plastic Co., Ltd.

6. A PVC leather for automobile interior, characterized in that: It comprises the heat-resistant skin layer as described in any one of claims 1 to 5, and a surface treatment agent layer located on the top of the skin layer, and the bottom of the heat-resistant skin layer is connected to a closed-cell foaming layer and an inner lining layer at the bottom.

7. The automotive interior PVC leather according to claim 6, characterized in that: The inner lining layer and the closed-cell foaming layer are connected by an adhesive, and the heat-pressure resistant skin layer and the closed-cell foaming layer are connected by an adhesive.

8. A method for preparing PVC leather for automobile interior, characterized in that: include: The proportioned polyvinyl chloride, phthalate, calcium stearate, zinc stearate, calcium carbonate and cross-linking agent are mixed and stirred to form a raw material slurry; The raw material slurry is coated on the base fabric to form a surface layer, and then separated from the base fabric to form a surface layer; Then a closed-cell foaming layer is formed on the inner lining layer by glue; Bonding the skin layer to the top of the closed cell foaming layer; Glue is then applied to the top of the epidermis, which is then air-dried and embossed to form a patterned structure.

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