High tactile feeling PVC and method for making same

Abstract

The application discloses high-touch PVC and a preparation method thereof, and the high-touch PVC comprises a base cloth layer, a bonding layer, a foaming layer, a skin layer, a skin treatment primer and a skin treatment topcoat which are sequentially arranged, wherein the skin treatment topcoat comprises the following raw materials in parts by weight: 80-90 parts of polycarbon type polyurethane, 3-5 parts of carbodiimide, 4-6 parts of POSS and 5-10 parts of a hand feel agent. The dry and wet feeling of the surface is improved by the addition of the POSS and the polysiloxane hand feel agent, so that the viscoelasticity of the high-touch PVC is closer to human skin than that of common PVC. The surface texture is designed to have a roughness close to that of fingerprints, so that the high-touch PVC has a more delicate and closer touch than common PVC. The thicknesses of the bonding layer, the foaming layer and the skin treatment primer are reduced, and the base cloth layer is subjected to a yarn false twist process and a raising process, so that the high-touch PVC has better soft and hard feeling while the physical properties of the PVC material meet the requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PVC, in particular to high-touch PVC and a preparation method thereof. BACKGROUND

[0002] With the development of the industry, automobile manufacturers have higher and higher requirements for seat leather materials in automobile interiors, and new requirements for the comfort of the touch of leather materials. How to improve the existing PVC materials to improve the comfort of the touch is a technical problem that needs to be solved in the field.

[0003] At present, in order to improve the touch of PVC materials, the surface treatment layer of PVC materials is mainly improved to improve the touch. For example, a PVC leather water-based matte finish and a preparation method thereof are disclosed in Chinese patent CN106349914A, which mainly changes the touch of PVC leather by adding water-based wax emulsion and polysiloxane water dispersion; for example, a water-based surface treatment agent, a high-flexibility skin-feeling PVC leather and a preparation method are disclosed in Chinese patent CN113637397A, which adds reactive POSS in the water-based surface treatment agent to make the viscoelastic coefficient of the surface treatment coating close to human skin, achieving a more flexible touch. Although the above-mentioned schemes can improve the touch of PVC materials to a certain extent, they still cannot meet the requirements of existing automobile manufacturers for the touch of PVC materials. SUMMARY

[0004] Based on the technical problems existing in the background art, the present application provides high-touch PVC and a preparation method thereof. The prepared PVC has good stick-slip feeling, softness and touch.

[0005] The high-touch PVC provided by the present application comprises a base cloth layer, an adhesive layer, a foaming layer, a skin layer, a skin treatment primer and a skin treatment topcoat arranged in sequence, wherein the skin treatment topcoat comprises the following raw materials in parts by weight: 80-90 parts of polycarbon urethane, 3-5 parts of carbodiimide, 4-6 parts of POSS and 5-10 parts of a hand feel agent.

[0006] Preferably, the hand feel agent is polysiloxane.

[0007] Preferably, the thickness of the skin treatment topcoat is 3-5 μm.

[0008] Preferably, the thickness of the skin treatment primer is 2-5 μm.

[0009] Preferably, the thickness of the skin layer is 180-220 μm.

[0010] Preferably, the thickness of the foaming layer is 200-260 μm.

[0011] Preferably, the thickness of the adhesive layer is 25-30 pm.

[0012] Preferably, the thickness of the base cloth layer is 800-900 pm.

[0013] Preferably, the base cloth layer is treated by a yarn false twist process and a raising process; the raising conditions are as follows: raising speed: 15±1.5 m / min, raising pressure: 0.5±0.05 MPa.

[0014] The preparation method of the high-touch PVC provided by the present application comprises the following steps:

[0015] S1: sequentially coating a skin layer, a foaming layer and an adhesive layer on a release paper, and performing drying treatment;

[0016] S2: combining a base cloth layer on the side of the adhesive layer away from the foaming layer;

[0017] S3: performing plasticization and cooling on the combined material, and then peeling off from the release paper;

[0018] S4: performing treatment on the skin layer, sequentially coating a skin treatment primer and a skin treatment topcoat, and then performing embossing treatment, to obtain the high-touch PVC.

[0019] The roughness (Ra) of the surface texture of the high-touch PVC is 7±1 pm, the average distance (S) of local peak top is 0.25±0.1 mm, and the maximum height (Ry) is 40±10 pm.

[0020] The present application has the following beneficial technical effects:

[0021] (1) The present application improves the dry and wet feeling of the surface by adding POSS and polysiloxane hand feel agents, so that the viscoelasticity of the surface is closer to human skin than that of ordinary PVC; and the surface texture with roughness close to fingerprint makes the touch of the present application more delicate and closer to the skin than that of ordinary PVC.

[0022] (2) The present application reduces the thickness of the adhesive layer, the foaming layer and the skin treatment primer, and simultaneously performs yarn false twist process and raising process on the base cloth layer, so that the soft and hard feeling, dry and wet feeling and rough and smooth feeling of the PVC material are better while the physical properties meet the requirements. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The present application provides a high-touch PVC structure diagram.

[0024] In the figure, 1 is a base cloth layer, 2 is an adhesive layer, 3 is a foaming layer, 4 is a skin layer, 5 is a skin treatment primer, and 6 is a skin treatment topcoat. DETAILED DESCRIPTION

[0025] The application will be further described in connection with specific embodiments.

[0026] Example 1

[0027] The high-touch PVC provided by the application comprises a base cloth layer, an adhesive layer, a foaming layer, a skin layer, a skin treatment bottom coating and a skin treatment top coating which are sequentially arranged, wherein the skin treatment top coating comprises the following raw materials in parts by weight: 8 kg of polycarbon type polyurethane, 0.4 kg of carbodiimide, 0.5 kg of POSS and 0.8 kg of hand feel agent.

[0028] The hand feel agent is polysiloxane; the thickness of the skin treatment top coating is 4 μm; the thickness of the skin treatment bottom coating is 3 μm; the thickness of the skin layer is 200 μm; the thickness of the foaming layer is 230 μm; and the thickness of the adhesive layer is 28 μm.

[0029] The base cloth layer is treated by a yarn false twist process and a raising process; the raising conditions are as follows: a raising speed of 15 m / min and a raising pressure of 0.5 MPa; and the compressibility T0-TM of the treated base cloth layer is above 0.8.

[0030] The preparation method of the high-touch PVC provided by the application comprises the following steps:

[0031] S1: sequentially coating the skin layer, the foaming layer and the adhesive layer on a release paper and performing drying treatment;

[0032] S2: combining the base cloth layer on the side of the adhesive layer away from the foaming layer;

[0033] S3: performing plasticization and cooling on the combined material, and then peeling off the material from the release paper;

[0034] S4: treating the skin layer, sequentially coating the skin treatment bottom coating and the skin treatment top coating, and then performing embossing treatment, to obtain the high-touch PVC.

[0035] Example 2

[0036] The high-touch PVC provided by the application comprises a base cloth layer, an adhesive layer, a foaming layer, a skin layer, a skin treatment bottom coating and a skin treatment top coating which are sequentially arranged, wherein the skin treatment top coating comprises the following raw materials in parts by weight: 8 kg of polycarbon type polyurethane, 0.4 kg of carbodiimide, 0.5 kg of POSS and 0.8 kg of hand feel agent.

[0037] The hand feel agent is polysiloxane; the thickness of the skin treatment top coating is 3 μm; the thickness of the skin treatment bottom coating is 2 μm; the thickness of the skin layer is 180 μm; the thickness of the foaming layer is 200 μm; and the thickness of the adhesive layer is 25 μm.

[0038] The base cloth layer is treated by a yarn false twist process and a raising process; the raising conditions are: raising speed 15 m / min, raising pressure 0.5 MPa, and the compressibility T0-TM of the treated base cloth layer is above 0.8.

[0039] The preparation method of the high-touch PVC is the same as that in Example 1.

[0040] Example 3

[0041] The high-touch PVC provided by the application comprises a base cloth layer, an adhesive layer, a foaming layer, a skin layer, a skin treatment primer and a skin treatment topcoat arranged in sequence, wherein the skin treatment topcoat comprises the following raw materials in parts by weight: 9 kg of polycarbonate polyurethane, 0.5 kg of carbodiimide, 0.6 kg of POSS and 1 kg of hand feel agent.

[0042] The hand feel agent is polysiloxane; the thickness of the skin treatment topcoat is 5 μm; the thickness of the skin treatment primer is 5 μm; the thickness of the skin layer is 220 μm; the thickness of the foaming layer is 260 μm; and the thickness of the adhesive layer is 30 μm.

[0043] The base cloth layer is treated by a yarn false twist process and a raising process; the raising conditions are: raising speed 15 m / min, raising pressure 0.5 MPa, and the compressibility T0-TM of the treated base cloth layer is above 0.8.

[0044] The preparation method of the high-touch PVC is the same as that in Example 1.

[0045] Comparative Example

[0046] The PVC material of the scheme is purchased from Suzhou Best Decoration New Material Co., Ltd., and is composed of a base cloth layer, an adhesive layer 33 μm, a foaming layer 275 μm, a skin layer 237 μm, a skin treatment primer 7 μm and a skin treatment topcoat 7 μm; the surface treatment agent used in the skin treatment topcoat is a water-based surface treatment agent, and the water-based surface treatment agent is as disclosed in Example 1 of the patent with the publication number CN113637397A.

[0047] Physical property detection is performed on the high-touch PVC prepared in Example 1, and the results are shown in Table 1. As can be seen from Table 1, the physical properties of the high-touch PVC prepared by the application meet the requirements.

[0048] Table 1: Physical property detection results of high-touch PVC

[0049]

[0050]

[0051]

[0052] In addition, the soft and hard feeling, dry and wet feeling and rough feeling of the PVC material of Example 1 and the comparative example were measured, and the results are shown in Table 2.

[0053] Table 2: Results of soft and hard feeling, dry and wet feeling and rough feeling detection of PVC material

[0054]

[0055]

[0056] It can be seen from the experimental results of Tables 1 and 2 that the high-touch PVC material prepared by the present application improves the dry and wet feeling of the surface by adding POSS and polysiloxane hand feel agent, so that it has a viscoelasticity closer to human skin than ordinary PVC; the surface texture is designed to have a roughness close to fingerprint, so that it has a more delicate and conformable touch than ordinary PVC; by reducing the thickness of the adhesive layer, the foaming layer and the primer coating of the skin treatment, and by performing yarn false twist process and raising process on the base cloth layer, the soft and hard feeling of the PVC material is better while the physical properties meet the requirements, because the thickness of each layer is changed and the base cloth layer is treated, so that the PVC material has a soft touch and a smooth and moist surface.

Claims

1. High tactile PVC, characterized in that, The high-touch PVC surface texture comprises a base cloth layer, an adhesive layer, a foaming layer, a skin layer, a skin treatment primer and a skin treatment topcoat arranged in sequence, wherein the skin treatment topcoat comprises the following raw materials in parts by weight: 80-90 parts of polycarbonate polyurethane, 3-5 parts of carbodiimide, 4-6 parts of POSS and 5-10 parts of a hand feel agent; The base cloth layer is treated by a yarn false twist process and a raising process; the raising conditions are as follows: raising speed 15±1.5 m / min and raising pressure 0.5±0.05 MPa; The roughness (Ra) of the high-touch PVC surface texture is 7±1 μm, the average distance (S) between local peak tops is 0.25±0.1 mm, and the maximum height (Ry) is 40±10 μm; The thickness of the skin treatment primer is 2-5 μm; The thickness of the foaming layer is 200-260 μm; The thickness of the adhesive layer is 25-30 μm.

2. The high tactile PVC of claim 1, wherein, The hand feel agent is a polysiloxane.

3. The high tactile PVC of claim 1, wherein, The thickness of the skin treatment topcoat is 3-5 μm.

4. The high tactile PVC of claim 1, wherein, The thickness of the skin layer is 180-220 μm.

5. The high tactile PVC of claim 1, wherein, The thickness of the base cloth layer is 800-900 μm.

6. The process for the production of high tactile PVC according to any one of claims 1 to 5, characterized in that, The method steps are as follows: S1: sequentially applying the skin layer, the foaming layer and the adhesive layer on a release paper and performing drying treatment; S2: combining the base cloth layer on the side of the adhesive layer away from the foaming layer; S3: performing plasticization and cooling of the combined material, and then peeling off from the release paper; S4: treating the skin layer, sequentially applying the skin treatment primer and the skin treatment topcoat, and then performing embossing treatment, to obtain the high-touch PVC.

Images