Surface layer, application of surface layer in manufacturing of PVC leather, PVC leather and manufacturing method of PVC leather

Abstract

The invention discloses a surface layer, application of the surface layer in manufacturing of PVC leather, the PVC leather and a manufacturing method of the PVC leather. The surface layer sequentially comprises a first connecting layer, a second connecting layer and a third connecting layer which are sequentially connected from top to bottom, the first connecting layer comprises the following components: PVC powder, a plasticizer, a calcium-zinc stabilizer and a microsphere foaming agent; the second connecting layer comprises the following components: PVC powder, a plasticizer, a calcium-zinc stabilizer, a foaming agent and antimony trioxide; and the third connecting layer comprises the following components: PVC paste, a plasticizer and a calcium-zinc stabilizer. The problem that the plasticizer is separated out when PVC is extruded is solved by changing the physical structure of the surface layer, micropores are formed in the PVC surface layer structure and do not float on the surface, and the industrial problem that the PVC extrusion-resistant plasticizer is separated out is solved while the low-temperature folding resistance and the surface performance are not affected.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, in particular to an epidermis layer and its use in manufacturing PVC leather, PVC leather and a manufacturing method thereof. Background Art

[0002] Nowadays, people have higher requirements for the comfort of car interiors and require the products to be made softer. In order to keep the soft state of PVC artificial leather for cars, a large amount of plasticizers must be added to the formula. Since the plasticizer and PVC are only connected by physical bonds such as hydrogen bonds and van der Waals forces, the plasticizer will precipitate when squeezed by external forces. As the plasticizer precipitates more, the leather will gradually become hard and easy to crack.

[0003] Therefore, it is urgent to find a method that can effectively solve the problem of plasticizer extrusion precipitation. Summary of the invention

[0004] The present invention provides a skin layer for solving the above problems, use of the skin layer in manufacturing PVC leather, PVC leather and a manufacturing method thereof.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] An epidermis layer, comprising, from top to bottom, sequentially connected: a first connection layer, a second connection layer, and a third connection layer;

[0007] The components of the first connecting layer include: PVC powder, plasticizer, calcium zinc stabilizer, microsphere foaming agent;

[0008] The components of the second connecting layer include: PVC powder, plasticizer, calcium zinc stabilizer, foaming agent, antimony trioxide;

[0009] The components of the third connecting layer include: PVC paste, plasticizer, and calcium zinc stabilizer.

[0010] In one embodiment, by weight:

[0011] The components of the first connecting layer include: 100 parts of PVC powder, 90 parts of plasticizer, 3 parts of calcium zinc stabilizer, and 0.5 parts of microsphere foaming agent;

[0012] The components of the second connecting layer include: 100 parts of PVC powder, 90 parts of plasticizer, calcium zinc stabilizer, 2 parts of ADC foaming agent, and 6 parts of antimony trioxide;

[0013] The components of the third connecting layer include: 100 parts of PVC paste, 2 parts of plasticizer, and 3 parts of calcium zinc stabilizer.

[0014] In one embodiment, the first connecting layer further comprises 8 parts of color paste by weight;

[0015] The first connecting layer also includes 1 portion of color paste.

[0016] In one embodiment, the plasticizer in the components of the first connecting layer is dioctyl phthalate, and / or the plasticizer in the components of the second connecting layer is dioctyl phthalate, and / or the plasticizer in the components of the third connecting layer is dioctyl phthalate.

[0017] In one embodiment, the stabilizer in the components of the first connecting layer is a calcium zinc stabilizer, and / or the stabilizer in the components of the second connecting layer is a calcium zinc stabilizer, and / or the stabilizer in the components of the third connecting layer is a calcium zinc stabilizer.

[0018] In one embodiment, it further includes a fourth connecting layer formed at the bottom of the third connecting layer, a base fabric layer is formed on the fourth connecting layer, and the material of the base fabric layer is weft-knitted polyester base fabric.

[0019] The invention is used in manufacturing PVC leather.

[0020] A PVC leather, comprising the epidermis layer, the foaming layer and the fabric layer as described in any one of the above;

[0021] A surface treatment agent layer is also formed on the top of the skin layer, and an adhesive layer is connected between the bottom of the foaming layer and the fabric.

[0022] A method for producing PVC leather, using any one of the above-mentioned epidermis layers:

[0023] The components of the first connecting layer are fully mixed and stirred and vacuumed to obtain a semi-finished product 1, the components of the second connecting layer are fully mixed and stirred to obtain a semi-finished product 2, and the components of the third connecting layer are fully mixed to obtain a paste-like semi-finished product 3;

[0024] Coating the semi-finished product on release paper and drying;

[0025] Spreading the semi-finished product 2 on the dried semi-finished product 1 and drying;

[0026] The semi-finished product three is coated on the dried semi-finished product two, and at the same time, it is attached to the base cloth and dried to form the semi-finished product four.

[0027] Compared with the prior art, the beneficial effects of the present invention include at least:

[0028] This invention can solve the problem of plasticizer precipitation when PVC is extruded by changing the physical structure of the epidermis without changing the type of plasticizer and the epidermis performance. The PVC epidermis structure has micropores, and the micropores do not float on the surface. It solves the industry problem of plasticizer precipitation in PVC extrusion resistance without affecting the low-temperature folding resistance and epidermis performance. It can achieve the purpose of soft hand feel by adding a high amount of plasticizer without the risk of plasticizer extrusion precipitation, thereby improving the softness and comfort of PVC leather. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic flow chart of a method for making PVC leather according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] The present invention provides an epidermis layer, which comprises, from top to bottom, a first connection layer, a second connection layer and a third connection layer which are connected in sequence.

[0033] The components of the first connecting layer include: PVC powder, plasticizer, calcium zinc stabilizer, microsphere foaming agent. The components of the second connecting layer include: PVC powder, plasticizer, calcium zinc stabilizer, foaming agent, antimony trioxide. The components of the third connecting layer include: PVC paste, plasticizer, calcium zinc stabilizer.

[0034] The first connecting layer, the second connecting layer and the third connecting layer used in the present invention, when formed on the surface of the fabric as a surface structure, have micropores in the surface layer structure, wherein the micropores can prevent the plasticizer from precipitating when the surface structure is bent, and the plasticizer can migrate into the micropores, so that the plasticizer still exists in the surface layer and will not cause the surface layer to harden with the increase of time.

[0035] In one embodiment, by weight:

[0036] The components of the first connecting layer include: 100 parts of PVC powder, 90 parts of plasticizer, 3 parts of calcium zinc stabilizer, and 0.5 parts of microsphere foaming agent.

[0037] The components of the second connecting layer include: 100 parts of PVC powder, 90 parts of plasticizer, calcium zinc stabilizer, 2 parts of ADC foaming agent, and 6 parts of antimony trioxide.

[0038] The components of the third connecting layer include: 100 parts of PVC paste, 2 parts of plasticizer, and 3 parts of calcium zinc stabilizer. According to experimental tests, the surface structure composed of the first connecting layer, the second connecting layer and the third connecting layer within this ratio range can maintain good flexibility and have a soft hand feel. The PVC resin in the first connecting layer is selected from Formosa Plastics' PR-1060 (powder), the plasticizer is selected from Kunshan Hefeng's DPHP, the calcium zinc stabilizer is selected from Xiongpai BAEROPAN MC 9700 KA / 1, and the microsphere foaming agent is selected from Akzo Nobel's microsphere foaming agent model 461DU40 CAS: 00-000-0.

[0039] The PVC plasticizer in the second connecting layer is PR-1060 (powder) from Formosa Plastics, the plasticizer is plasticizer 343 from Kunshan Hefeng, the calcium zinc stabilizer is XP810, the foaming agent is azodicarbonamide from Handuo, and the antimony trioxide is 98% antimony trioxide model from Huati.

[0040] In some embodiments, the first connecting layer further comprises 8 parts of color paste by weight.

[0041] The second connecting layer also includes 1 portion of color paste. Color paste can also be added to the first connecting layer and the second connecting layer to increase the color.

[0042] In one embodiment, the plasticizer in the components of the first connecting layer is dioctyl phthalate, and / or the plasticizer in the components of the second connecting layer is dioctyl phthalate, and / or the plasticizer in the components of the third connecting layer is dioctyl phthalate. The use of dioctyl phthalate as a plasticizer can increase the softness, plasticity and ductility of PVC, making it softer, easier to bend, and having better cold resistance.

[0043] In one embodiment, the stabilizer in the components of the first tie layer is a calcium zinc stabilizer, and / or the stabilizer in the components of the second tie layer is a calcium zinc stabilizer, and / or the stabilizer in the components of the third tie layer is a calcium zinc stabilizer. The calcium zinc stabilizer can improve the thermal stability of PVC, prevent degradation caused by heat during processing, and avoid dehydrochlorination reaction, thereby maintaining the performance of PVC without degradation.

[0044] In one embodiment, a fourth connection layer is formed at the bottom of the third connection layer, and a base fabric layer is formed on the fourth connection layer, and the base fabric layer is made of weft-knitted polyester base fabric. The base fabric layer serves as the support of the bottom layer to form a complete surface structure, which facilitates subsequent bonding and connection.

[0045] In one embodiment, the above-mentioned skin layer is used in manufacturing PVC leather.

[0046] The second aspect of the present invention further discloses a PVC leather, comprising the epidermis layer, the foaming layer and the fabric layer as described in any one of the above.

[0047] A surface treatment agent layer is also formed on the top of the epidermis layer, and an adhesive layer is connected between the bottom of the foaming layer and the fabric. After inspection, the bottom of the epidermis layer is sequentially connected to the foaming layer, and the adhesive layer is connected through the foaming layer.

[0048] Reference Figure 1 The third aspect of the present invention discloses a method for making PVC leather, using any one of the above-mentioned epidermis layers:

[0049] The components of the first connecting layer are fully mixed and stirred and vacuumed to obtain a semi-finished product 1, the components of the second connecting layer are fully mixed and stirred to obtain a semi-finished product 2, and the components of the third connecting layer are fully mixed to obtain a paste-like semi-finished product 3. When making the semi-finished product 1 of the first connecting layer, a mixer can be used to rotate and stir, and the semi-finished product 1 after being fully mixed can be vacuumed. Similarly, the semi-finished products 2 and 3 are stirred and formed.

[0050] The semi-finished product is coated on the release paper and dried. The semi-finished product after being fully stirred is coated on the release paper and then moved to the drying equipment for drying.

[0051] The semi-finished product 3 is coated on the dried semi-finished product 2, and the base cloth is attached and dried to form the semi-finished product 4. The steps are repeated to coat the semi-finished product 3 on the top surface of the semi-finished product 2, and the base cloth is attached and dried again to form the semi-finished product 4. The epidermis layer structure produced by this method can form a dense microporous structure on the top of the epidermis layer to prevent the plasticizer from precipitating out and losing.

[0052] The present invention proposes for the first time to use a PVC surface layer structure with micropores, and the micropores do not float on the surface. It solves the industry problem of PVC extrusion resistance plasticizer precipitation without affecting the low-temperature folding resistance and surface performance. It can achieve the purpose of soft hand feel by adding a high amount of plasticizer without the risk of plasticizer extrusion precipitation, thereby improving the softness and comfort of PVC leather.

[0053] Embodiment 1:

[0054] Step 1: 100 parts of Formosa Plastics' PVC powder, 90 parts of Hefeng's plasticizer dioctyl phthalate, 3 parts of Xiongpai's calcium zinc stabilizer, 0.5 parts of Akzo Nobel's microsphere foaming agent, and 8 parts of Meicai's color paste are fully mixed and vacuumed to obtain a semi-finished product 1.

[0055] Step 2: Mix 100 parts of Formosa Plastics' PVC powder, 90 parts of Hefeng's plasticizer dioctyl phthalate, 3 parts of Xiongpai's calcium zinc stabilizer, 2 parts of Handuo's foaming agent azodicarbonamide, 6 parts of Huati's antimony trioxide, and 1 part of Meicai's color paste, and obtain semi-finished product 2 after thorough mixing.

[0056] Step 3: Fully mix 100 parts of Formosa Plastics' PVC paste resin, 100 parts of Hefeng's plasticizer dioctyl phthalate, and 2 parts of Xiong's calcium zinc stabilizer to obtain a paste glue semi-finished product 3.

[0057] Step 4: Coat the semi-finished product 3 on the dried semi-finished product 2, and simultaneously adhere the base fabric to dry to form the semi-finished product 4. After being dried in the oven, the semi-finished product 2 is coated on it at the coating station 2, and after being further dried in the oven, the semi-finished product 3 is coated on it at the coating station 3, and the weft-knitted polyester base fabrics are adhered together and passed through a long oven at 215°C to obtain the semi-finished product 4.

[0058] Step 5: The semi-finished product 4 is surface coated with a treatment agent and embossed to form the final PVC artificial leather.

[0059] Comparative Example 1:

[0060] Step 1: Mix 100 parts of Formosa Plastics' PVC powder, 75 parts of Hefeng's plasticizer dioctyl phthalate, 3 parts of Xiongpai's calcium zinc stabilizer, and 8 parts of Meicai's color paste, and evacuate the mixture to obtain a semi-finished product 1.

[0061] Step 2: Mix 100 parts of Formosa Plastics' PVC powder, 75 parts of Hefeng's plasticizer dioctyl phthalate, 3 parts of Xiongpai's calcium zinc stabilizer, 2 parts of Handuo's foaming agent azodicarbonamide, 6 parts of Huati's antimony trioxide, and 1 part of Meicai's color paste, and obtain semi-finished product 2 after thorough mixing.

[0062] Step 3: Fully mix 100 parts of Formosa Plastics' PVC paste resin, 100 parts of Hefeng's plasticizer dioctyl phthalate, and 2 parts of Xiong's calcium zinc stabilizer to obtain a paste glue semi-finished product 3.

[0063] Step 4: first coat the semi-finished product 1 on the release paper at coating station 1, and then coat the semi-finished product 2 on it at coating station 2 after drying in an oven. Then, coat the semi-finished product 3 on it at coating station 3 after further drying in an oven. At the same time, the weft-knitted polyester base fabrics are bonded together and then passed through a long oven at 215°C to obtain a semi-finished product 4.

[0064] Step 5: The semi-finished product 4 is surface coated with a treatment agent and embossed to form the final PVC artificial leather.

[0065] Comparative Example 2:

[0066] Step 1: Mix 100 parts of Formosa Plastics' PVC powder, 90 parts of Hefeng's plasticizer dioctyl phthalate, 3 parts of Xiongpai's calcium zinc stabilizer, and 8 parts of Meicai's color paste, and evacuate the mixture to obtain a semi-finished product 1.

[0067] Step 2: Mix 100 parts of Formosa Plastics' PVC powder, 90 parts of Hefeng's plasticizer dioctyl phthalate, 3 parts of Xiongpai's calcium zinc stabilizer, 2 parts of Handuo's foaming agent azodicarbonamide, 6 parts of Huati's antimony trioxide, and 1 part of Meicai's color paste, and obtain semi-finished product 2 after thorough mixing.

[0068] Step 3: Fully mix 100 parts of Formosa Plastics' PVC paste resin, 100 parts of Hefeng's plasticizer dioctyl phthalate, and 2 parts of Xiong's calcium zinc stabilizer to obtain a paste glue semi-finished product 3.

[0069] Step 4: first coat the semi-finished product 1 on the release paper at coating station 1, and then coat the semi-finished product 2 on it at coating station 2 after drying in an oven. Then, coat the semi-finished product 3 on it at coating station 3 after further drying in an oven. At the same time, the weft-knitted polyester base fabrics are bonded together and then passed through a long oven at 215°C to obtain a semi-finished product 4.

[0070] Step 5: The semi-finished product 4 is surface coated with a treatment agent and embossed to form the final PVC artificial leather.

[0071]

[0072]

[0073] According to experimental tests, the PVC leather disclosed in the present invention has the feature that when the PVC leather is squeezed, the plasticizer can migrate into the micropores, and when the pressure disappears, the plasticizer in the micropores will return to the PVC. This design allows the PVC to achieve a soft effect by adding a high amount of plasticizer, effectively preventing the plasticizer from precipitating outwards and causing the PVC leather to become hard.

[0074] 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. An epidermis layer, characterized in that: The following are sequentially connected from top to bottom: a first connection layer, a second connection layer, and a third connection layer; The components of the first connecting layer include: PVC powder, plasticizer, calcium zinc stabilizer, microsphere foaming agent; The components of the second connecting layer include: PVC powder, plasticizer, calcium zinc stabilizer, foaming agent, antimony trioxide; The components of the third connecting layer include: PVC paste, plasticizer, and calcium zinc stabilizer.

2. The epidermis layer according to claim 1, characterized in that By weight: The components of the first connecting layer include: 100 parts of PVC powder, 90 parts of plasticizer, 3 parts of calcium zinc stabilizer, and 0.5 parts of microsphere foaming agent; The components of the second connecting layer include: 100 parts of PVC powder, 90 parts of plasticizer, 2 parts of calcium zinc stabilizer ADC foaming agent, and 6 parts of antimony trioxide; The components of the third connecting layer include: 100 parts of PVC paste, 2 parts of plasticizer, and 3 parts of calcium zinc stabilizer.

3. The epidermis layer according to claim 2, characterized in that: The first connecting layer further comprises 8 parts of color paste by weight; The second connecting layer also includes 1 portion of color paste.

4. The epidermis layer according to claim 1, characterized in that: The plasticizer in the components of the first connecting layer is dioctyl phthalate, and / or the plasticizer in the components of the second connecting layer is dioctyl phthalate, and / or the plasticizer in the components of the third connecting layer is dioctyl phthalate.

5. The epidermis layer according to claim 1, characterized in that: The stabilizer in the components of the first connecting layer is a calcium zinc stabilizer, and / or the stabilizer in the components of the second connecting layer is a calcium zinc stabilizer, and / or the stabilizer in the components of the third connecting layer is a calcium zinc stabilizer.

6. The epidermis layer according to claim 1, characterized in that It also includes a fourth connecting layer formed at the bottom of the third connecting layer, a base fabric layer is formed on the fourth connecting layer, and the material of the base fabric layer is weft-knitted polyester base fabric.

7. Use of the epidermis layer according to any one of claims 1 to 6 in the manufacture of PVC leather.

8. A PVC leather, characterized in that: Comprising the epidermis layer, foaming layer and fabric layer according to any one of claims 1 to 6; A surface treatment agent layer is also formed on the top of the epidermis layer, and an adhesive layer is connected between the bottom of the foaming layer and the fabric.

9. A method for making PVC leather, characterized in that: The epidermis layer according to any one of claims 1 to 6: The components of the first connecting layer are fully mixed and stirred and vacuumed to obtain a semi-finished product 1, the components of the second connecting layer are fully mixed and stirred to obtain a semi-finished product 2, and the components of the third connecting layer are fully mixed to obtain a paste-like semi-finished product 3; Coating the semi-finished product on release paper and drying; Spreading the semi-finished product 2 on the dried semi-finished product 1 and drying; The semi-finished product three is coated on the dried semi-finished product two, and at the same time, it is attached to the base fabric and dried to form the semi-finished product four.

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