阅读说明：本技术 一种表面耐刮擦的人造革及其生产方法 (Artificial leather with scratch-resistant surface and production method thereof ) 是由 顾凤楼 于 2018-08-17 设计创作，主要内容包括：本发明揭示了一种表面耐刮擦的人造革及其生产方法。所述表面耐刮擦的人造革的生产方法包括如下步骤：1)表皮层的制备；2)第一次印刷处理：在所述表皮层的表面上印刷涂料并烘干,以在所述表皮层的表面上形成内涂料层；3)压花：用压花辊在所述内涂料层上压制花纹,形成压花半成品；4)第二次印刷处理：在所述内涂料层上印刷涂料并烘干,以形成位于所述内涂料层的外侧的外涂料层。在压花工艺的前后分别通过所述第一次印刷处理工艺和第二次印刷处理工艺形成了内外设置的所述内涂料层和所述外涂料层,所述第一次印刷处理工艺和第二次印刷处理工艺相互配合应用,使得需要形成花纹的人造革的表面的性能,特别是耐刮差的性能和产品整体光泽度的均匀性都得到了很大的提升,取得了预料不到的技术效果。(The invention discloses artificial leather with a scratch-resistant surface and a production method thereof. The production method of the artificial leather with the scratch-resistant surface comprises the following steps: 1) preparing a surface layer; 2) first printing treatment: printing a coating on the surface of the skin layer and drying to form an inner coating layer on the surface of the skin layer; 3) embossing: embossing patterns on the inner coating layer by using an embossing roller to form an embossed semi-finished product; 4) and (3) second printing treatment: and printing a coating on the inner coating layer and drying to form an outer coating layer positioned on the outer side of the inner coating layer. The first printing treatment process and the second printing treatment process are matched with each other for application, so that the surface performance of the artificial leather needing to form patterns, particularly the poor scratch resistance performance and the integral glossiness uniformity of the product are greatly improved, and an unexpected technical effect is achieved.)

1. A method for producing artificial leather with a scratch-resistant surface, comprising the steps of:

1) preparing a surface layer;

2) first printing treatment: printing a coating on the surface of the skin layer and drying to form an inner coating layer on the surface of the skin layer;

3) embossing: embossing patterns on the inner coating layer by using an embossing roller to form an embossed semi-finished product;

4) and (3) second printing treatment: and printing a coating on the inner coating layer and drying to form an outer coating layer positioned on the outer side of the inner coating layer.

2. The method for producing artificial leather having a scratch-resistant surface according to claim 1, characterized in that: printing a coating at least twice on the surface of the skin layer in the first printing process, and printing a coating at least once on the inner coating layer in the second printing process; preferably, the number of times of printing the coatings in the first printing process is greater than the number of times of printing the coatings in the second printing process.

3. The method for producing artificial leather having a scratch-resistant surface according to claim 2, characterized in that: in the first printing process and the second printing process, the thickness of the dope printed at each time is 4 to 8 μm, preferably 5 to 7 μm, more preferably 6 to 7 μm.

4. The method for producing artificial leather having a scratch-resistant surface according to claim 2, characterized in that: in the first printing process, after each printing of the coating, the printed coating is pre-cured at a relatively low temperature, and after all printing is completed, the printed coating is completely cured at a relatively high temperature.

5. The method for producing artificial leather having a scratch-resistant surface according to claim 4, characterized in that: the lower temperature is 30-60 ℃, preferably 40-58 ℃, more preferably 50-58 ℃; the higher temperature is 60-75 deg.C, preferably 65-73 deg.C, more preferably 68-73 deg.C.

6. The method for producing artificial leather having a scratch-resistant surface according to claim 4, characterized in that: the pre-curing time is 40 to 70 seconds, preferably 50 to 60 seconds, and more preferably 60 seconds; the time for thorough curing is 70 to 100 seconds, preferably 80 to 90 seconds, more preferably 90 seconds.

7. The method for producing artificial leather having a scratch-resistant surface according to any one of claims 1 to 6, characterized in that: the epidermal layer is a PVC epidermal layer or a TPO epidermal layer or a PU epidermal layer.

8. The method for producing artificial leather having a scratch-resistant surface according to any one of claims 1 to 6, characterized in that: the coating is water paint or solvent paint.

9. The method for producing artificial leather having a scratch-resistant surface according to any one of claims 1 to 6, characterized in that: the surface of the artificial leather is made to exhibit different appearance effects by adjusting the gloss of the paint used in the first printing process and the second printing process, respectively.

10. An artificial leather having a scratch-resistant surface produced by the production method of artificial leather having a scratch-resistant surface as claimed in any one of claims 1 to 9.

[ technical field ] A method for producing a semiconductor device

The invention relates to artificial leather and a production method thereof, wherein the surface of the artificial leather has good scratch resistance.

[ background of the invention ]

In the automobile field, artificial leather is widely applied as an interior material, and is mainly applied to automobile seats, automobile door panels, automobile instrument panels and the like. There are various kinds of artificial leathers such as polyvinyl chloride artificial leather (hereinafter, PVC artificial leather), thermoplastic polyolefin artificial leather (hereinafter, TPO artificial leather), polyurethane artificial leather (hereinafter, PU artificial leather), and the like. With the continuous development of the automobile industry, people have higher and higher requirements on environmental protection, safety, attractiveness, practicability and the like of automobiles, and in the automobile artificial leather, the paint layer on the surface of the artificial leather can endow the artificial leather with special performances such as scratch resistance, comfortable hand feeling, static resistance and the like.

Chinese invention patent CN201410797166.0 discloses an application of light polyolefin foam in environment-friendly automotive interior artificial leather, and specifically discloses an application of the light polyolefin foam in PVC artificial leather and TPO artificial leather. The preparation method of the PVC artificial leather comprises the following steps: 1) treating the surface of the light polyolefin foam; 2) producing a polyvinyl chloride skin by adopting a coating process, and simultaneously compounding the polyvinyl chloride skin with the light polyolefin foam subjected to surface treatment at a high temperature to obtain a polyvinyl chloride type environment-friendly automotive interior artificial leather semi-finished product; 3) coating a paint layer on the surface of the polyvinyl chloride by using the semi-finished product through a printing process to obtain a printed semi-finished product; 4) carrying out high-temperature embossing treatment on the printed semi-finished product on an embossing machine to obtain PVC artificial leather; 5) and (6) cutting. The preparation method of the TPO artificial leather comprises the following steps: 1) treating the surface of the light polyolefin foam; 2) extruding a thermoplastic polyolefin elastomer skin; 3) coating a paint layer on the surface of the thermoplastic polyolefin elastomer through a printing process; 4) compounding the light polyolefin foam subjected to surface treatment with the printed thermoplastic polyolefin elastomer skin on an embossing machine, and simultaneously carrying out embossing treatment to obtain TPO artificial leather; 5) and (6) cutting. Namely, the invention patent discloses a manufacturing process of printing first and embossing later, and the manufacturing process enables the thickness of a paint layer at the top of a pattern to be thinner and the scratch resistance of a final finished product to be lower. Particularly for some automobile interior leather with complex patterns and deep grooves, the preparation process disclosed by the invention often causes the paint layer on the top of the patterns of some products to be lost, namely the surface part is not provided with paint, so that the product yield is seriously influenced.

Chinese invention patent CN201410191073.3 discloses a durable PVC artificial leather with high strength and bottom odor and a production method thereof, wherein the production method of the PVC artificial leather comprises the following steps: 1) preparing PVC compact layer slurry and PVC foaming layer slurry; 2) coating the base material with PVC compact layer slurry and PVC foaming layer slurry in sequence, and respectively plasticizing; 3) and (3) embossing and surface printing the plasticized and molded base material in sequence to obtain the base odor high-strength durable PVC artificial leather. Namely, the invention patent discloses a manufacturing process of embossing and printing, which prevents paint from penetrating into the bottom of the pattern, thereby causing uneven glossiness of the whole surface of the product, and because the paint cannot penetrate into the bottom of the pattern and is well combined with the skin layer of the PVC artificial leather, the paint in the groove is easy to be scraped and fall off, therefore, the PVC artificial leather prepared by the manufacturing process has poor scraping resistance.

In order to solve the technical problem of poor scratch resistance of artificial leather, a person skilled in the art generally studies how to improve the scratch resistance of a paint layer by adjusting a formula of paint, obviously, the cost of the artificial leather is greatly increased, and the appearance effect of the artificial leather is affected by adjusting the formula of the paint, but so far, the artificial leather is the only study direction for solving the technical problem of poor scratch resistance of the artificial leather.

Therefore, it is desirable to provide a new solution to meet the above-mentioned needs.

[ summary of the invention ]

The technical problem to be solved by the invention is as follows: provided is a method for producing artificial leather having a scratch-resistant surface, which is excellent in scratch-resistant property of the surface.

In order to solve the above problems, the present invention can adopt the following technical scheme: a method for producing artificial leather with a scratch-resistant surface, comprising the steps of: 1) preparing a surface layer; 2) first printing treatment: printing a coating on the surface of the skin layer and drying to form an inner coating layer on the surface of the skin layer; 3) embossing: embossing patterns on the inner coating layer by using an embossing roller to form an embossed semi-finished product; 4) and (3) second printing treatment: and printing a coating on the inner coating layer and drying to form an outer coating layer positioned on the outer side of the inner coating layer.

The skin layer can be a PVC skin layer, a TPO skin layer, a PU skin layer or any other skin material suitable for artificial leather. Those skilled in the art can select appropriate formulation materials and contents to prepare the skin layer applied to the present invention based on the description of the context of the present invention and common general knowledge.

An inner coating layer and an outer coating layer which are arranged inside and outside are formed before and after the embossing process through a first printing treatment process and a second printing treatment process respectively. Firstly, the technical problem that paint cannot penetrate into the bottom of a pattern due to first embossing and second printing can be solved by forming the inner coating layer before embossing, and the technical problems that the glossiness of the whole surface of a product is not uniform, the paint cannot be well combined with a surface layer, and the paint is easy to scratch and fall off due to the fact that the first embossing and the second printing are performed are solved. Secondly, the technical problem that the tops of patterns are thinned and even lost due to an embossing process can be solved by forming the outer coating layer after embossing, and the surface scratch resistance of the artificial leather is well improved. Finally, the first printing treatment process and the second printing treatment process are matched with each other before the embossing process and after the embossing process, so that the surface performance of the artificial leather needing to form patterns, particularly the poor scratch resistance performance and the uniformity of the product finishing glossiness are greatly improved, and an unexpected technical effect is achieved.

It will be understood by those skilled in the art that the steps 1), 2), 3), and 4) do not limit the production of artificial leather to these four steps, and those skilled in the art can add required processes before or after any one step according to the requirements of different properties. It will also be understood by those skilled in the art that the steps 1), 2), 3) and 4) are in a sequential relationship, but this does not limit that the four steps must be adjacent, for example, in some TPO artificial leather production processes, an electronic crosslinking process is added between the steps 3) and 4).

When the skin layer subjected to the first printing treatment is embossed, the skin layer is heated at the temperature of 130-230 ℃ and then passes through the embossing roller at the speed of 5-25m/min, and patterns on the embossing roller are transferred to the skin layer to form the embossed semi-finished product.

The coating can be water paint or solvent paint. When the coating selects to use the water-based paint, the components of the coating can be water-based resin, water, cosolvent, amine neutralizer and curing agent, the water-based resin can be selected from water-based polyurethane resin, the cosolvent can be selected from isopropanol solvent, the amine neutralizer can be selected from triethanolamine, and the curing agent can be selected from polyurethane curing agent. The content ratio of the waterborne polyurethane resin, water, cosolvent, amine neutralizer and curing agent is 0.8-1.1: 2.9-3.3: 0.8-1.2: 1.7-2.1: 0.3-0.7.

In the first printing process and the second printing process, the temperature of the coating used for printing is 24 to 28 ℃, more preferably 26 to 27 ℃.

Printing a coating at least twice on the surface of the skin layer in the first printing process, and printing a coating at least once on the inner coating layer in the second printing process; preferably, the number of times of printing the coatings in the first printing process is greater than the number of times of printing the coatings in the second printing process. Since the inner coating layer serves to connect the skin layer and the outer coating layer, it is necessary to print at least twice to ensure the connection strength and the compression strength in the subsequent embossing process. Since the overcoat layer is not subjected to a destructive process such as embossing after being formed, various properties and structures thereof can be maintained relatively easily, and thus, the number of times of printing the overcoat layer can be reduced.

In the first printing process and the second printing process, the thickness of the dope printed at each time is 4 to 8 μm, preferably 5 to 7 μm, more preferably 6 to 7 μm. The printing technology who adopts all adopts the scraper to print at present, is difficult to accomplish to make the thickness of the coating of printing at every turn be less than 4 mu m, when the thickness of the coating of printing at every turn is greater than 8 mu m, although the resistant scraping performance of synthetic leather can promote, but the adhesion between every layer of coating can receive the influence, has the risk that the adhesion is not firm. In general, the total thickness of the inner layer dope and the outer layer dope is controlled to be 8 to 20 μm, the thickness of the inner layer dope is preferably 10 to 14 μm, and the thickness of the outer layer dope is preferably 5 to 7 μm. The speed of each printing is preferably 10-30 m/min.

In the first printing process, after each printing of the coating, the printed coating is pre-cured at a relatively low temperature, and after all printing is completed, the printed coating is completely cured at a relatively high temperature. By pre-cure is meant that the coating is initially cured but not completely cured in the liquid state. After each time of printing the paint, the printed paint is primarily cured at a lower temperature to provide a stable joint surface for the next printed paint, so that the paint is not completely cured, and the paint has good adhesive force with the next printed paint. When printing is required a plurality of times in the second printing process as well, the above processing is also employed.

In a preferred embodiment of the invention, the lower temperature is in the range of 30-60 ℃, preferably 40-58 ℃, more preferably 50-58 ℃; the higher temperature is 60-75 deg.C, preferably 65-73 deg.C, more preferably 68-73 deg.C. The lower temperature is the temperature for pre-curing, and the higher temperature is the temperature for complete curing. Further, the pre-curing time is 40 to 70 seconds, preferably 50 to 60 seconds, and more preferably 60 seconds; the time for thorough curing is 70 to 100 seconds, preferably 80 to 90 seconds, more preferably 90 seconds.

In the embossing process, the skin layer subjected to the first printing treatment passes through a preheating roller at 90-110 ℃ at a speed of 10m/min, then passes through an embossing roller at 150-190 ℃ at a speed of 10m/min, and patterns on the embossing roller are transferred to the skin layer to form the embossed semi-finished product.

In a preferred embodiment of the present invention, the surface of the artificial leather can exhibit different appearance effects by adjusting the gloss of the paint used in the first printing process and the second printing process, respectively. The invention breaks through the concept that in the prior art, in order to change the appearance effect of the artificial leather, only the formula of the coating (such as adding different color masterbatches) or the formula of the surface layer (such as adding different color masterbatches) can be changed, and provides a new solution, namely, the appearance effect is adjusted by adjusting the glossiness of the pattern bottom coating (namely the inner coating layer) and the pattern top coating (namely the outer coating layer), so that different colors and/or layering and/or three-dimensional sense can be obtained, and the cost is greatly saved while the appearance requirement is met.

The technical problems to be solved by the present invention are as follows: provided is artificial leather having a scratch-resistant surface.

In order to solve the above problems, the present invention can adopt the following technical scheme: an artificial leather with a scratch-resistant surface is produced by the production method of the artificial leather with the scratch-resistant surface.

The PVC artificial leather produced by the invention can be applied to the fields of automobile seats, household sofas and the like.

The TPO artificial leather produced by the method can be applied to the fields of automobile door plates, automobile instrument panels and the like.

[ detailed description ] embodiments

The present invention will be described in further detail with reference to specific embodiments thereof. The specific embodiments described herein are illustrative of exemplary embodiments of the invention for the purpose of clarity and are not intended to limit the scope of the invention. Those skilled in the art, on the basis of these exemplary embodiments, may make modifications, combinations, and the like of the features of these embodiments without departing from the spirit and scope of the present invention. The embodiments obtained by such modifications and combinations are still within the scope of the present invention. The scope of the invention is defined by the claims.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In this specification, unless otherwise stated, percentages, parts, etc. given are by weight.