Precipitation-resistant resin layer and preparation method thereof, artificial leather and preparation method thereof, and automobile

Abstract

The invention relates to a precipitation-resistant resin layer for artificial leather and a preparation method thereof, artificial leather and a preparation method thereof, and an automobile. The resin layer is prepared from a resin layer raw material; the resin layer is prepared from the following raw materials in parts by weight: 100 parts of PVC powder and CPE powder, 30-60 parts of migration-resistant plasticizer and 2-4 parts of stabilizer; wherein the mass ratio of the PVC powder to the CPE powder is (60-95): (5-40); the CPE powder contains an external lubricating substance, and the proportion of the external lubricating substance in the CPE powder is 2%-4%; the migration-resistant plasticizer comprises one or a combination of more of a trimellitic plasticizer, a polyester plasticizer and a citric acid plasticizer. The precipitation resistance and the low-temperature bending resistance of the resin layer or the artificial leather can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of artificial leather, and in particular to an artificial leather with a precipitation-resistant resin layer, a preparation method thereof, and a car. Background Art

[0002] Artificial leather is increasingly used as a synthetic leather substitute for genuine leather, especially as a surface covering material for automotive interiors, such as seats, door panels, armrests, headrests, and soft covers for central control. Existing artificial leathers are heated, squeezed, or contacted with organic plasticizers for a long time, and the plasticizers gradually migrate outward, the leather gradually hardens, and it is easy to crack after bending. At present, the common practice in the industry is to use high molecular weight plasticizers (such as benzene and polyester plasticizers) that are resistant to precipitation to reduce their precipitation. However, these plasticizers have poor low temperature resistance, resulting in artificial leathers that cannot meet the low temperature bending requirements. Therefore, the application of such migration-resistant plasticizers in the field of artificial leather is greatly limited.

[0003] In summary, the PVC leather industry is in urgent need of a solution that can comprehensively solve the plasticizer's resistance to precipitation and low-temperature bending. Summary of the invention

[0004] Based on the above situation, the main purpose of the present invention is to provide a precipitation-resistant resin layer and a preparation method thereof, artificial leather and a preparation method thereof, and an automobile, which can improve the precipitation resistance and low-temperature bending resistance of artificial leather.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A first aspect of the present invention provides a precipitation-resistant resin layer for artificial leather, wherein the resin layer is prepared from a resin layer raw material;

[0007] The resin layer raw material includes: 100 parts of PVC powder and CPE powder, 30-60 parts of migration-resistant plasticizer, and 2-4 parts of stabilizer; wherein the mass ratio of the PVC powder to the CPE powder is (60-95): (5-40);

[0008] The CPE powder contains an external lubricating substance, and the external lubricating substance accounts for 2% to 4% of the CPE powder;

[0009] The migration-resistant plasticizer includes one or a combination of benzene, polyester and citric acid plasticizers.

[0010] Optionally, the external lubricating substance is selected from stearic acid-based external lubricants.

[0011] Optionally, the benzene plasticizer is selected from one or a combination of trimellitic acid isooctyl ester, trimellitic acid triisononyl ester, trimellitic acid trioctyl ester, trimellitic acid triglyceride, and trimellitic acid tri(2-ethylhexyl) ester;

[0012] The polyester plasticizer is selected from one or a combination of polypropylene glycol oxalate, polytetraethylene glycol adipate, and polyethylene glycol adipate;

[0013] The citric acid plasticizer is selected from acetyl tributyl citrate.

[0014] The second aspect of the present invention provides a method for preparing any one of the above-mentioned resistant resin layers, wherein the resin layer raw materials are subjected to hot mixing, banburying and calendering processes to form the resistant resin layer.

[0015] Among them, the temperature of hot mixing is 90℃~110℃, and the duration is 6~10 minutes; the temperature of banburying is 150℃~180℃, and the duration is 6 minutes~10 minutes; the temperature of calendering is 155℃~180℃.

[0016] The third aspect of the present invention provides a precipitation-resistant artificial leather, comprising a base fabric layer, a foaming layer and a dense layer laminated in sequence, wherein the foaming layer is obtained by foaming the precipitation-resistant resin layer described in any one of the above items, and the dense layer is the precipitation-resistant resin layer described in any one of the above items;

[0017] The resin layer raw material of the foaming layer further includes: 1-3 parts of foaming agent, 6-8 parts of antimony trioxide, and 0.5-1 part of colorant; the resin raw material of the dense layer further includes: 4-8 parts of colorant.

[0018] Optionally, the foamed layer has a thickness of 0.25 mm to 0.55 mm; and the dense layer has a thickness of 0.15 mm to 0.25 mm.

[0019] Optionally, the base fabric of the base fabric layer has a weight of 100 g to 150 g per square meter and a thickness of 0.4 mm to 0.7 mm.

[0020] The fourth aspect of the present invention provides a method for preparing the precipitation-resistant artificial leather as described in any one of the above items, comprising the steps of:

[0021] S100: The resin layer raw material of the dense layer is formed into a dense layer through hot mixing, banburying and calendering processes;

[0022] S200: The resin layer raw material of the foaming layer is formed into a foaming semi-finished product through hot mixing, banburying and calendering processes;

[0023] S300: laminating the dense layer, the foamed semi-finished product and the base fabric layer to each other, and foaming the foamed semi-finished product through the foaming process to form a foamed layer, thereby obtaining the artificial leather;

[0024] Wherein, in the step S100 and the step S200, the temperature of hot mixing is 90°C to 110°C and the duration is 6 to 10 minutes; the temperature of banburying is 150°C to 180°C and the duration is 6 to 10 minutes; and the temperature of calendering is 155°C to 180°C.

[0025] Optionally, the step S300 includes:

[0026] S311: stacking and laminating the base fabric layer, the foamed semi-finished product and the dense layer in sequence to obtain a first leather semi-finished product; wherein the base fabric layer and the foamed semi-finished product are laminated with glue, and the foamed semi-finished product and the dense layer are laminated with pressure;

[0027] S312: Foaming the leather semi-finished product at a temperature of 200° C. to 220° C. for 1 to 2 minutes, so that the foamed semi-finished product is formed into a foamed layer after foaming to obtain the artificial leather.

[0028] Optionally, the step S300 includes:

[0029] S321: Laminating the foamed semi-finished product and the base fabric to obtain a second leather semi-finished product;

[0030] S322: Foaming the second leather semi-finished product at a temperature of 200° C. to 220° C. for 1 to 2 minutes, so that the foamed semi-finished product is formed into a foamed layer after foaming, thereby obtaining a third leather semi-finished product;

[0031] S323: The dense layer is laminated to the foamed layer side of the third leather semi-finished product by pressure to obtain the artificial leather.

[0032] Optionally, in the step S300, after the dense layer, the foamed semi-finished product and the base fabric layer 30 are bonded to each other and the foamed semi-finished product is foamed to form a foamed layer through the foaming process, the dense layer side is surface-coated and embossed with a treating agent to obtain the artificial leather.

[0033] The fifth aspect of the present invention provides an automobile, including an automobile interior, wherein the automobile interior includes the resin layer described in any one of the above items or the resin layer prepared by the above preparation method, or the artificial leather described in any one of the above items, or the artificial leather obtained by any one of the above preparation methods.

[0034] In the resin layer of the present invention, a CPE elastomer containing an external lubricating substance is used to replace part of the PVC in the resin layer raw material, and an environmentally friendly migration-resistant plasticizer is used, which can simultaneously improve the low-temperature bending resistance of the material and the precipitation resistance of the plasticizer. After the material is used to prepare artificial leather, the low-temperature bending resistance and precipitation resistance of the artificial leather can be improved at the same time. And because CPE contains a large number of chlorine atoms, it can be better compatible with the molecular chains in PVC, thereby improving the density of the prepared resin layer and artificial leather and the stability of the material. At the same time, a certain amount of external lubricating substance is added to the CPE powder of the present invention. Because the compatibility of this external lubricating substance with PVC and CPE is very small, in the preparation of the resin and artificial leather, this external lubricating substance can be transferred to the surface to increase the lubricity of the resin layer. Even if the temperature is as high as 160°C, the problem of sticking to the roller will not occur, making the preparation process easier to implement.

[0035] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0037] Figure 1 A schematic structural diagram of a preferred embodiment of the precipitation-resistant artificial leather provided by the present invention;

[0038] Figure 2 The present invention provides a flowchart of a preferred embodiment of the method for preparing the precipitation-resistant artificial leather.

[0039] In the figure:

[0040] 10. Dense layer; 20. Foaming layer; 30. Base fabric layer. DETAILED DESCRIPTION

[0041] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0042] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0043] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0044] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. The parts of each component described herein refer to parts by weight.

[0045] The present invention provides a precipitation-resistant resin layer for artificial leather, specifically for PVC artificial leather, which can be used in multiple scenarios such as automobile interior decoration, such as automobile seats. The resin layer is prepared from a resin layer raw material, which includes 100 parts of PVC (i.e. polyvinyl chloride) powder and CPE (i.e. chlorinated polyethylene) powder, 30 to 60 parts of a migration-resistant plasticizer, and 2 to 4 parts of a stabilizer; wherein the mass ratio of PVC powder to CPE powder is (60 to 95): (5 to 40); CPE powder contains an external lubricating substance, and the proportion of the external lubricating substance in the CPE powder is 2% to 4%; the migration-resistant plasticizer includes one or a combination of several of a benzene plasticizer, a polyester plasticizer, and a citric acid plasticizer.

[0046] The components in the resin layer raw materials are described based on 100 parts of PVC powder and CPE powder, that is, when the total of PVC powder and CPE powder is 100 parts, the migration-resistant plasticizer is 30-60 parts, and the stabilizer is 2-4 parts, or in other words, the weight ratio of the total of PVC powder and CPE powder, the migration-resistant plasticizer, and the stabilizer is 100: (30-60): (2-4). Specifically, when the total of PVC powder and CPE powder is 100 parts, the migration-resistant plasticizer can be 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts or 60 parts, etc., and the stabilizer can be 2 parts, 3 parts or 4 parts, etc. Among them, in the 100 parts of PVC powder and CPE powder used as the benchmark, the PVC powder is 60-95 parts, such as 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts or 95 parts; the CPE powder is 5-40 parts, such as 5 parts, 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts or 40 parts; and in addition to the CPE component, the CPE powder also has an external lubricating substance, which accounts for 2% to 4% of the total mass of the CPE powder, such as 2%, 2.5%, 3%, 3.5% or 4%.

[0047] The above-mentioned migration-resistant plasticizer is an environmentally friendly plasticizer, which is a macromolecular plasticizer. Specifically, all of them can be benzene plasticizers, or polyester plasticizers, or citric acid plasticizers. The migration-resistant plasticizer can also be a mixture of benzene plasticizers and polyester plasticizers, or a mixture of benzene plasticizers and citric acid plasticizers, or a mixture of polyester plasticizers and citric acid plasticizers. The migration-resistant plasticizer can also be a mixture of benzene plasticizers, polyester plasticizers and citric acid plasticizers.

[0048] The resin layer of the present invention uses a CPE elastomer containing an external lubricating substance in the resin layer raw material to replace part of the PVC, and adopts a migration-resistant plasticizer at the same time, which can simultaneously improve the low-temperature flexural resistance and precipitation resistance of the resin layer. After the resin layer is used to prepare artificial leather, the low-temperature flexural resistance and precipitation resistance of the artificial leather can be simultaneously improved.

[0049] In some artificial leathers, in order to solve the problem of low-temperature resistance and tortuosity, POE or TPU thermoplastic elastomers are added to the raw materials of the resin layer. However, POE contains hydrocarbons and TPU contains nitrogen, and neither contains chlorine atoms. Therefore, they are not compatible with the macromolecular chains of PVC, the main component of the artificial leather resin layer, which leads to processing difficulties. Moreover, the processing requires a higher temperature, and too high a temperature will cause PVC to decompose prematurely, affecting the performance of the artificial leather. In addition, the cost of POE or TPU is also high, which is not conducive to industrial application. The present invention uses CPE thermoplastic high elastomer. Since CPE contains a large number of chlorine atoms, it can be better compatible with the molecular chains in PVC, easy to process, and its processing temperature is low, so it can avoid the premature decomposition of PVC, thereby improving the performance of the prepared resin structure and artificial leather. Moreover, the cost of CPE is several times lower than that of POE or TPU, which is more conducive to industrial application. Meanwhile, if CPE powder is directly used to replace part of PVC powder, since CPE is a thermoplastic elastomer, although it will change from a solid state to a highly elastic state when the temperature rises to 80°C, when processed together with PVC powder, the temperature of PVC needs to reach at least 160°C to be well plasticized, and at this time, CPE has begun to stick to the roller, affecting the molded resin structure and the quality of artificial leather. In severe cases, qualified artificial leather cannot be smoothly produced. However, a certain amount of external lubricating substance is added to the CPE powder of the present invention, and this external lubricating substance has little compatibility with PVC and CPE. In the preparation of the resin layer and artificial leather, it can be transferred to the surface, thereby increasing the lubricity of the material. Even if the temperature is as high as 160°C, the problem of sticking to the roller will not occur, thereby solving the problem of sticking to the roller caused by directly using CPE powder to replace part of the PVC powder, making the preparation process easier to implement, and improving the quality of the prepared resin layer and artificial leather.

[0050] The CPE powder can be prepared by mixing CPE raw materials and external lubricating substances in proportion, such as by mixing CPE elastomer with external lubricating substances in a molten state. In a preferred embodiment of the present invention, pure CPE and external lubricating substances are stirred and mixed in advance to obtain CPE powder containing external lubricating substances, and then mixed with other components in the resin layer raw materials. Of course, CPE powder containing external lubricating substances can also be obtained by other methods.

[0051] The external lubricating substance may be PE wax. In a preferred embodiment of the present invention, the external lubricating substance includes stearic acid substances, such as stearic acid and calcium stearate. Since stearic acid substances are weakly acidic, they are easier to transfer to the material surface than other external lubricating substances, and can adhere to the metal surface well to form a stable lubricating layer, which can better play a lubricating effect during the resin layer molding process; and stearic acid substances contain 18 carbon atoms, are not easy to volatilize, and still have a good lubricating effect at high temperatures, so they can play a more stable lubricating effect.

[0052] The benzene plasticizer, polyester plasticizer and citric acid plasticizer can be selected from these types of plasticizers in the prior art, such as the benzene plasticizer can be selected from one or more combinations of trimellitic acid isooctyl ester, trimellitic acid triisononyl ester, trimellitic acid trioctyl ester, trimellitic acid triglyceride, trimellitic acid tri(2-ethylhexyl) ester; the polyester plasticizer can be selected from one or more combinations of polyoxypropylene glycol, polyoxyethylene glycol adipate, and polyethylene adipate; the citric acid plasticizer can be selected from acetyl tributyl citrate. In a preferred embodiment, the benzene plasticizer is trimellitic acid isooctyl ester; the polyester plasticizer is polyoxypropylene glycol adipate; and the citric acid plasticizer is acetyl tributyl citrate. The use of this plasticizer is more environmentally friendly and can improve the migration resistance of the resin layer or artificial leather.

[0053] The stabilizer may specifically be a calcium zinc stabilizer.

[0054] In one embodiment, the resin layer is a foamed semi-finished product, which can obtain a foamed layer after foaming by a foaming process. The resin layer raw material of the foamed layer also includes: 1 to 3 parts of a foaming agent, such as 1 part, 2 parts or 3 parts of the foaming agent. Among them, the foaming agent may include azodicarbonamide. In some embodiments, the resin layer raw material of the foamed layer also includes 6 to 8 parts of antimony trioxide and 0.5 to 1 part of a colorant. Specifically, antimony trioxide can be 6 parts, 7 parts or 8 parts, and the colorant can be 0.5 parts, 0.8 parts or 1 part.

[0055] Among them, the foaming layer is formed by first preparing a foaming semi-finished product from a resin layer raw material of the foaming layer, and then foaming, wherein the thickness of the foaming semi-finished product can be 0.15mm~0.35mm, such as 0.15mm, 0.20mm, 0.25mm, 0.3mm or 0.35mm, etc.; the thickness of the foaming layer obtained after foaming can be 0.25mm~0.55mm, such as 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm or 0.55mm, etc.

[0056] In another embodiment, the resin layer is a dense layer, and the resin raw material of the resin layer further includes: 4 to 8 parts of colorant, such as 4 parts, 5 parts, 6 parts, 7 parts or 8 parts of colorant, etc. In this embodiment, the thickness of the dense layer can be 0.15 mm to 0.25 mm, such as 0.15 mm, 0.18 mm, 0.20 mm, 0.22 mm, 0.24 mm or 0.25 mm, etc.

[0057] It should be noted that, in the resin layer raw material of the foaming layer, the above-mentioned mass parts of the foaming agent, antimony trioxide and colorant are based on 100 parts of PVC powder and CPE powder in the resin layer raw material of the foaming layer; similarly, in the resin layer raw material of the dense layer, the mass parts of the colorant are based on 100 parts of PVC powder and CPE powder in the resin layer raw material of the dense layer.

[0058] The foamed layer or dense layer prepared by the present invention can improve the migration resistance and low-temperature bending resistance of the foamed layer or dense layer, and avoid the roller sticking problem in the preparation process, because the raw material of the resin layer adopts CPE powder containing external lubricating substances to replace part of the PVC powder, and is combined with a migration-resistant plasticizer.

[0059] The present invention also provides a method for preparing the resin layer in each of the above embodiments, using the resin layer raw materials described in each of the above embodiments to form after hot mixing, banburying, and calendering processes, wherein the temperature of hot mixing is 90°C to 110°C and the duration is 6 minutes to 10 minutes; the temperature of banburying is 150°C to 180°C and the duration is 6 minutes to 10 minutes; the temperature of calendering is 155°C to 180°C. In other words, the resin layer raw materials in the above embodiments are mixed at a system temperature of 90°C to 110°C, such as a system temperature of 90°C, 95°C, 100°C, 105°C or 110°C, and the mixing time is 6 minutes to 10 minutes, such as 6 minutes, 7 minutes, 8 minutes, 9 minutes or 10 minutes, and specifically, stirring can be used to increase the uniformity of the mixing. After mixing the components of the resin layer raw materials, they are kneaded for 6 to 10 minutes at a system temperature of 150°C to 180°C, such as a system temperature of 150°C, 155°C, 160°C, 165°C, 170°C, 175°C or 180°C, and the kneading time is 6 minutes, 7 minutes, 8 minutes, 9 minutes or 10 minutes, so that the PVC powder is fully plasticized and fully mixed with the highly elastic CPE, further improving the mixing uniformity of the raw materials. The uniformly mixed resin layer raw materials are calendered by a calendering roller at a temperature of 155°C to 180°C to form a precipitation-resistant resin layer. Specifically, the temperature of the calendering roller can be 155°C, 160°C, 165°C, 170°C, 175°C or 180°C, etc. The present invention forms the resin layer by calendering, which can avoid the problem of uneven coating caused by the CPE being a highly viscous material, and can avoid adhesion to the calendering roller during the calendering process by adding an external lubricating substance. At the same time, the present invention adopts the resin layer raw material and the above-mentioned preparation process parameters to reduce the temperature during the processing and minimize the material temperature, thereby further solving the problem of sticking to the roller. Therefore, a resin layer with a smooth surface and resistance to migration can be prepared.

[0060] The present invention also provides a precipitation-resistant artificial leather, comprising the above-mentioned resin layer. Figure 1 As shown, the artificial leather comprises a dense layer 10, a foaming layer 20 and a base fabric layer 30, and the dense layer 10, the foaming layer 20 and the base fabric layer 30 are laminated and bonded. The foaming layer 20 and the dense layer 10 are the foaming layer and the dense layer described in the above embodiment, that is, the foaming layer 20 is prepared by the resin layer raw material of the above foaming layer to obtain a foamed semi-finished product, and then subjected to foaming treatment; the dense layer 10 is prepared by the resin layer raw material of the above dense layer.

[0061] The present invention also provides a method for preparing the precipitation-resistant artificial leather, such as Figure 2 As shown, the steps include:

[0062] S100: The resin layer raw material of the dense layer is formed into a dense layer through hot mixing, banburying and calendering processes;

[0063] S200: The resin layer raw material of the foaming layer is formed into a foaming semi-finished product through hot mixing, banburying and calendering processes;

[0064] S300: laminating the dense layer, the foamed semi-finished product and the base fabric layer to each other, and foaming the foamed semi-finished product through a foaming process to form a foamed layer, thereby obtaining artificial leather;

[0065] Among them, in the above-mentioned step S100 and the step S200, the process parameters of the dense layer molding and the foamed semi-finished product molding process are the process parameters of the above-mentioned resin layer molding, that is, the hot mixing temperature is 110℃~130℃, and the duration is 6 to 10 minutes; the mixing temperature is 150℃~180℃, and the duration is 6 minutes to 10 minutes; the calendering temperature is 155℃~180℃. The details will not be elaborated here, and you can refer to the resin layer molding process mentioned above.

[0066] Since the foaming layer and the dense layer of the artificial leather of the present invention have various properties of the above-mentioned resin layer, the bending resistance and precipitation resistance of the artificial leather can be improved at a relatively low cost, reaching the level of PU leather or genuine leather. Among them, the prepared artificial leather can meet the requirements of 30,000 times of bending resistance at minus 10°C in the folding fastness test, and can still meet the requirements of 10,000 times of low-temperature bending resistance at minus 10°C after 72 hours of oleic acid aging in the oil aging resistance test.

[0067] The dense layer 10 and the foamed semi-finished product, and the foamed semi-finished product or the foamed layer 20 (described in detail below) and the base fabric layer 30 can be bonded together by glue or pressure, specifically by hot pressing.

[0068] In one embodiment, in the above step S300, the base fabric layer 30, the foamed semi-finished product and the dense layer 10 may be sequentially stacked and bonded, and then foamed. Specifically, step S300 includes:

[0069] S311: stacking and laminating the base fabric layer 30, the foamed semi-finished product and the dense layer 10 in sequence to obtain a first leather semi-finished product; wherein the base fabric layer 30 and the foamed semi-finished product are laminated by glue, and the foamed semi-finished product and the dense layer 30 are laminated by pressure;

[0070] S312: Foaming the semi-finished leather product at a temperature of 200° C. to 220° C. for 1 to 2 minutes, so that the foamed semi-finished product is formed into a foamed layer 30 after foaming to obtain artificial leather.

[0071] In another embodiment, in the above step S300, the foamed semi-finished product may be firstly laminated only on the base fabric layer, and then subjected to a foaming process, and then laminated on the dense layer 10. Specifically, step S300 includes:

[0072] S321: Laminating the foamed semi-finished product and the base fabric 30 to obtain a second leather semi-finished product;

[0073] S322: Foaming the second leather semi-finished product at a temperature of 200° C. to 220° C. for 1 to 2 minutes, so that the foamed semi-finished product is formed into a foamed layer 20 after foaming, thereby obtaining a third leather semi-finished product;

[0074] S323: The dense layer 10 is laminated to the foamed layer 20 side of the third leather semi-finished product by pressure, thereby obtaining artificial leather.

[0075] The foaming temperature in the above step S312 and step S322 can be specifically 200°C, 205°C, 210°C, 215°C or 220°C, etc., and the foaming time can be specifically 1 minute, 1.5 minutes or 2 minutes, etc.

[0076] In some embodiments, in the above step S300, after the dense layer 10, the foamed semi-finished product and the base fabric layer 30 are bonded to each other and the foamed semi-finished product is foamed to form a foamed layer through a foaming process, the surface of the dense layer 10 is coated and embossed with a surface treatment agent, and then the artificial leather is obtained. That is to say, the artificial leather also includes a surface treatment agent layer, and the surface treatment agent layer is arranged on the side of the dense layer 10 away from the foaming layer 20. Specifically, the surface treatment agent layer can be formed by coating, printing and other processes of the surface treatment agent raw material on one side of the dense layer 10, and then embossed to obtain the finished artificial leather. By setting the surface treatment agent layer, the surface feel, oil resistance, wear resistance and other properties of the artificial leather can be improved. Specifically, the surface treatment agent raw material can adopt the surface treatment agent raw material in the prior art, and the coating, printing and embossing processes can also be carried out using existing processes.

[0077] The base fabric weight of the base fabric layer in the above embodiments is 100 g / m2 to 150 g / m 2 , thickness is 0.4mm~0.7mm, if the weight of the base fabric layer is 100g / m 2 , 110g / m 2 , 120g / m 2 , 130g / m 2 , 140g / m 2 Or 150g / m 2 The thickness is 0.4 mm, 0.5 mm, 0.6 mm or 0.7 mm. Preferably, the base fabric weight of the base fabric layer 30 is 130 g / m 2 , thickness is 0.5mm.

[0078] The present invention also provides an automobile, including an automobile interior, such as an automobile seat, a soft bag of an automobile central control, etc., wherein the automobile interior comprises the resin layer described in any of the above embodiments, or the resin layer prepared by the preparation method described in any of the above embodiments, or the artificial leather described in any of the above embodiments, or the artificial leather obtained by the preparation method described in any of claims 8 to 11.

[0079] Several specific embodiments of the artificial leather of the present invention and some comparative examples are given below.

[0080] Example 1

[0081] S11: using the resin layer raw material of the dense layer to form a dense layer through hot mixing, banburying and calendering processes;

[0082] S12: using the resin layer raw material of the foaming layer to form a foaming semi-finished product through hot mixing, banburying and calendering processes;

[0083] S13: stacking and laminating the base fabric layer 30, the foamed semi-finished product and the dense layer 10 in sequence to obtain a first leather semi-finished product; then, foaming the leather semi-finished product to form a foamed layer 30 to obtain artificial leather;

[0084] The raw materials of the resin layer of the dense layer and the resin layer of the foaming layer include: 60 parts of PVC powder, 40 parts of CPE powder, 50 parts of migration-resistant plasticizer, and 2 parts of stabilizer; and the external lubricating substance in the CPE powder accounts for 2% of the CPE powder. The raw materials of the resin layer of the foaming layer also include: 1-3 parts of foaming agent, 6-8 parts of antimony trioxide, and 0.5-1 part of colorant; the raw materials of the resin layer of the dense layer also include: 4-8 parts of colorant.

[0085] Example 2

[0086] Different from Example 1, in step S11 and step S12, the compositions of the resin layer raw material of the dense layer and the resin layer raw material of the foaming layer are slightly different. In Example 2, the resin layer raw materials of the two layers include: 80 parts of PVC powder, 20 parts of CPE powder, 30 parts of migration-resistant plasticizer, and 3 parts of stabilizer; and the proportion of external lubricating substance in the CPE powder is 4%.

[0087] Example 3

[0088] Different from Example 1, in step S11 and step S12, the compositions of the resin layer raw material of the dense layer and the resin layer raw material of the foaming layer are slightly different. In Example 3, the resin layer raw materials of the two layers include: 95 parts of PVC powder, 5 parts of CPE powder, 60 parts of migration-resistant plasticizer, and 2 parts of stabilizer; and the proportion of external lubricating substance in the CPE powder is 3%.

[0089] Example 4

[0090] Different from Example 1, in step S11 and step S12, the compositions of the resin layer raw material of the dense layer and the resin layer raw material of the foaming layer are slightly different. In Example 4, the resin layer raw materials of the two layers include: 70 parts of PVC powder, 30 parts of CPE powder, 40 parts of migration-resistant plasticizer, and 4 parts of stabilizer; and the proportion of external lubricating substance in the CPE powder is 4%.

[0091] Example 5

[0092] Different from Example 1, in step S13 of Example 5: after the base fabric layer 30 and the foamed semi-finished product are stacked and bonded, the foamed semi-finished product is first foamed into a foamed layer by a foaming treatment, and then the dense layer 10 and the foamed layer 20 are stacked and bonded to obtain artificial leather.

[0093] Comparative Example 1

[0094] Different from Example 1, in step S11 and step S12, the compositions of the resin layer raw material of the dense layer and the resin layer raw material of the foaming layer are different. In Comparative Example 1, POE powder is used instead of CPE powder in the resin layer raw materials of these two layers, and DOS plasticizer is used instead of migration-resistant plasticizer.

[0095] Comparative Example 2

[0096] Different from Example 1, in step S11 and step S12, the compositions of the resin layer raw material of the dense layer and the resin layer raw material of the foaming layer are different. In Comparative Example 1, CPE powder is not used in the resin layer raw materials of these two layers, but 100 parts of PVC powder is used, and migration-resistant plasticizer is not used, but DOS plasticizer is used.

[0097] The artificial leathers of the above-mentioned embodiments and comparative examples were subjected to performance tests, folding fastness tests were conducted according to QB / T 2714-2005, precipitation tests were conducted according to the oil aging test method in VDA230-225, and low-temperature bending resistance tests were conducted after 72 hours of oleic acid aging. According to the tests, the artificial leathers obtained from Examples 1 to 5 can meet the 30,000 times bending resistance test at minus 10°C, and can still meet the low-temperature bending resistance test at minus 10°C for at least 10,000 times after 72 hours of oleic acid aging; while comparative example 1 was broken after 1,000 times, and comparative example 2 was also broken after 1,000 times. It can be seen that the artificial leather of the present invention has the characteristics of oil flexural resistance and precipitation resistance.

[0098] It should be noted that the use of step numbers (letters or numbers) to refer to certain specific method steps in the present invention is only for the purpose of convenience and brevity of description, and is by no means intended to limit the order of these method steps by letters or numbers. Those skilled in the art will understand that the order of the relevant method steps should be determined by the technology itself and should not be inappropriately limited by the existence of step numbers. Those skilled in the art can determine various permissible and reasonable step orders based on the technology itself.

[0099] It should be emphasized that the selection of specific values ​​of various parameter indicators involved in the present invention not only requires the inventor to have a theoretical basis far beyond the level of ordinary technicians in the field, but also requires creative attempts and selections based on the expected design results, supplemented by several arduous experiments, to finally obtain the expected target results. The determination of these values ​​cannot be obtained by ordinary technicians in the field without creative labor.

[0100] Those skilled in the art will appreciate that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0101] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. A precipitation-resistant resin layer for artificial leather, characterized in that: The resin layer is prepared from resin layer raw materials; The resin layer raw material includes: 100 parts of PVC powder and CPE powder, 30-60 parts of migration-resistant plasticizer, and 2-4 parts of stabilizer; wherein the mass ratio of the PVC powder to the CPE powder is (60-95): (5-40); The CPE powder contains an external lubricating substance, and the external lubricating substance accounts for 2% to 4% of the CPE powder; The migration-resistant plasticizer includes one or a combination of benzene, polyester and citric acid plasticizers.

2. The precipitation-resistant resin layer according to claim 1, characterized in that: The external lubricating substance is selected from stearic acid external lubricants.

3. The precipitation-resistant resin layer according to claim 1, characterized in that: The benzene plasticizer is selected from one or a combination of trimellitic acid isooctyl ester, trimellitic acid triisononyl ester, trimellitic acid trioctyl ester, trimellitic acid triglyceride, and trimellitic acid tri(2-ethylhexyl) ester; The polyester plasticizer is selected from one or a combination of polypropylene glycol oxalate, polytetraethylene glycol adipate, and polyethylene glycol adipate; The citric acid plasticizer is selected from acetyl tributyl citrate.

4. A method for preparing the precipitation-resistant resin layer according to any one of claims 1 to 3, characterized in that: The resin layer raw material is formed into the migration-resistant resin layer through hot mixing, banburying and calendering processes. Among them, the temperature of hot mixing is 90℃~110℃, and the duration is 6~10 minutes; the temperature of banburying is 150℃~180℃, and the duration is 6 minutes~10 minutes; the temperature of calendering is 155℃~180℃.

5. A precipitation-resistant artificial leather, characterized in that: It comprises a base fabric layer, a foaming layer and a dense layer which are sequentially laminated and bonded, wherein the foaming layer is obtained by foaming the resistant resin layer according to any one of claims 1 to 3, and the dense layer is the resistant resin layer according to any one of claims 1 to 3; The resin layer raw material of the foaming layer further includes: 1-3 parts of foaming agent, 6-8 parts of antimony trioxide, and 0.5-1 part of colorant; the resin raw material of the dense layer further includes: 4-8 parts of colorant.

6. The precipitation-resistant resin layer according to claim 5, characterized in that: The thickness of the foaming layer is 0.25 mm to 0.55 mm; the thickness of the dense layer is 0.15 mm to 0.25 mm.

7. The precipitation-resistant artificial leather according to claim 6, characterized in that: The base fabric of the base fabric layer has a weight of 100 g to 150 g per square meter and a thickness of 0.4 mm to 0.7 mm.

8. A method for preparing the precipitation-resistant artificial leather according to any one of claims 5 to 7, characterized in that: Includes steps: S100: The resin layer raw material of the dense layer is formed into a dense layer through hot mixing, banburying and calendering processes; S200: The resin layer raw material of the foaming layer is formed into a foaming semi-finished product through hot mixing, banburying and calendering processes; S300: laminating the dense layer, the foamed semi-finished product and the base fabric layer to each other, and foaming the foamed semi-finished product through the foaming process to form a foamed layer, thereby obtaining the artificial leather; Wherein, in the step S100 and the step S200, the temperature of hot mixing is 90°C to 110°C and the duration is 6 to 10 minutes; the temperature of banburying is 150°C to 180°C and the duration is 6 to 10 minutes; and the temperature of calendering is 155°C to 180°C.

9. The precipitation-resistant artificial leather according to claim 8, characterized in that: The step S300 includes: S311: stacking and laminating the base fabric layer, the foamed semi-finished product and the dense layer in sequence to obtain a first leather semi-finished product; wherein the base fabric layer and the foamed semi-finished product are laminated with glue, and the foamed semi-finished product and the dense layer are laminated with pressure; S312: Foaming the leather semi-finished product at a temperature of 200° C. to 220° C. for 1 to 2 minutes, so that the foamed semi-finished product is formed into a foamed layer after foaming to obtain the artificial leather.

10. The precipitation-resistant artificial leather according to claim 8, characterized in that: The step S300 includes: S321: Laminating the foamed semi-finished product and the base fabric to obtain a second leather semi-finished product; S322: Foaming the second leather semi-finished product at a temperature of 200° C. to 220° C. for 1 to 2 minutes, so that the foamed semi-finished product is formed into a foamed layer after foaming, thereby obtaining a third leather semi-finished product; S323: The dense layer is laminated to the foamed layer side of the third leather semi-finished product by pressure to obtain the artificial leather.

11. The precipitation-resistant artificial leather according to any one of claims 8 to 10, characterized in that: In the step S300, after the dense layer, the foamed semi-finished product and the base fabric layer 30 are bonded to each other and the foamed semi-finished product is foamed to form a foamed layer through the foaming process, the dense layer side is surface-coated and embossed with a treatment agent to obtain the artificial leather.

12. A car, characterized in that: The invention comprises an automobile interior, wherein the automobile interior comprises the resin layer according to any one of claims 1 to 3 or the resin layer prepared by the preparation method according to claim 4, or the artificial leather according to any one of claims 5 to 7, or the artificial leather obtained by the preparation method according to any one of claims 8 to 11.

Images