High-light-resistance colored texture pattern synthetic leather and preparation process thereof

Abstract

The invention discloses high-light-resistant synthetic leather with color textures and patterns, which comprises a base cloth layer, a PVC (polyvinyl chloride) layer, a color textures and patterns layer, a transparent connecting layer and a semitransparent light-resistant protective layer, and also provides a preparation process for preparing the high-light-resistant synthetic leather with color textures and patterns. Therefore, the synthetic leather with the high-light-fastness color texture patterns presents natural simulation, has the light sensation color texture patterns with stereoscopic impression, and also has a high-light-fastness color fastness grade.

Description

Technical Field

[0001] The invention relates to the technical field of synthetic leather, in particular to a highly light-resistant colorful texture pattern synthetic leather and a preparation process thereof. Background Art

[0002] At present, synthetic leather has been widely used in automotive interior materials. Synthetic leather is usually composed of a fabric base and several resin layers, which are bonded to the fabric base in sequence. In order to increase the beauty and simulation of synthetic leather, synthetic leather is usually surface modified. The surface modification of synthetic leather is an important link to improve the grade of synthetic leather products and enrich the expressiveness of synthetic leather. Common synthetic leather surface modification methods include: embossing, spraying, etc.

[0003] Embossing is a common post-processing method for synthetic leather, mainly used for surface texture modification of synthetic leather with wet coating. Through mechanical embossing, the originally smooth surface of synthetic leather presents texture similar to the grain of natural leather, which beautifies the surface of synthetic leather and increases the sense of simulation. At the same time, embossing also increases the firmness of the leather body and improves the mechanical properties. However, the surface pattern and color changes of synthetic leather processed by embossing technology are relatively simple, which is difficult to meet the development of the industry and the needs of customers for diversified product design.

[0004] Spraying is to apply slurry to the surface of synthetic leather by spraying with a spray gun. The coating thickness is uniform, smooth and flat, and the appearance is decorative. However, the slurry utilization efficiency is low, and the atomized and dispersed slurry causes the deterioration of the working environment and environmental pollution. In addition, spraying patterns or patterns directly on the resin layer will cause the surface of the synthetic leather to have a more obvious artificial texture, affecting its texture.

[0005] In addition, in addition to the various performance requirements of traditional synthetic leather, synthetic leather for automotive interiors should also meet some special requirements. Among them, due to the large inclination of the front windshield of the car, the car seat may be exposed to sunlight for a long time. Therefore, synthetic leather for automobiles should have good light fastness performance. However, for light-colored or brightly colored synthetic leather, its light fastness performance is poor, resulting in unstable color and coating during use and storage, resulting in a short service life. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a process for preparing highly light-resistant colored textured pattern synthetic leather. The highly light-resistant colored textured pattern synthetic leather prepared by the preparation process has a high-textured colored texture pattern and a high light-resistant color fastness grade.

[0007] The technical solution of the present invention is:

[0008] A process for preparing highly light-resistant colored textured pattern synthetic leather, characterized by comprising the following preparation steps:

[0009] S1. Preparation of transparent connecting layer:

[0010] The mixed slurry of polyurethane resin and epoxy acrylic resin is coated on the release film and dried in an oven to form a transparent connecting layer, which is used for printing the color texture pattern layer and bonding with the PVC layer;

[0011] S2. Preparation of color texture pattern layer:

[0012] Printing a color texture pattern layer on the transparent connection layer by a gravure printing machine, wherein the color texture pattern layer is printed by a multi-pass gravure printing plate roller process;

[0013] S3. Preparation of base fabric layer and PVC layer:

[0014] Apply the bottom PVC resin slurry on the base fabric layer and dry it in an oven to form a PVC layer on the base fabric layer;

[0015] The base fabric layer comprises at least one of polyester, nylon and spandex, preferably polyester;

[0016] The bottom PVC resin slurry comprises 80-100 parts of PVC powder, 1-5 parts of foaming agent (AC), 50-70 parts of plasticizer, 2-8 parts of calcium zinc stabilizer, and 10-30 parts of filler (CaCO3).

[0017] S4. The color texture pattern layer in S2 is composited on the PVC layer by a thermal composite process, while removing the release film;

[0018] S5. Preparation of translucent light-resistant protective layer:

[0019] By weight, 80-100 parts of PVC powder, 50-70 parts of plasticizer, 3-8 parts of stabilizer, 2-5 parts of phosphite antioxidant, and 1-3 parts of hindered phenol antioxidant are mixed and stirred to form a light-resistant protective layer slurry, and the light-resistant protective layer slurry is coated on the side of the transparent connecting layer in S4 away from the base fabric layer, and after drying in an oven, a translucent light-resistant protective layer is obtained, thereby manufacturing the highly light-resistant color texture pattern synthetic leather;

[0020] Among them, the PVC powder in step S3 and the PVC powder in step S5 are both Formosa Plastics S-70;

[0021] The plasticizer includes one or more of dioctyl phthalate DOP and butyl phthalate DBP;

[0022] The stabilizer includes one or more of a metal salt heat stabilizer, an organic heat stabilizer, and an auxiliary heat stabilizer; wherein the calcium zinc stabilizer is preferred among the metal salt heat stabilizers.

[0023] Furthermore, the multi-pass gravure roller process in step S2 includes a first gravure roller process and an N+1th gravure roller process, where N is an integer greater than 0;

[0024] Among them, the depths of the gravure grooves distributed in different areas on the gravure roller in the first gravure roller process are different; the gravure roller in the N+1th gravure roller process is the same as or different from the gravure roller in the first gravure roller process, and the position where it is printed on the transparent connecting layer is the same as or staggered with the position where it is printed on the transparent connecting layer in the first gravure roller process, and its ink color is the same as or different from the ink color used in the first gravure roller process.

[0025] Furthermore, the gravure groove has a depth of 10-80 μm.

[0026] Furthermore, the gravure groove is at least one of circular, diamond-shaped, square, and rectangular.

[0027] Furthermore, the thermal composite process in step S4 is a hot roller pressing process, the hot roller temperature is 160° C.-180° C., the hot roller speed is 5-20 m / min, and the hot roller pressure is 0.3-0.6 MPa.

[0028] Furthermore, in the step S5, the ratio of phosphite antioxidant to hindered phenol antioxidant is (2-5): (1-3).

[0029] Furthermore, the phosphite antioxidant includes at least one of tris[2.4-di-tert-butylphenyl]phosphite, triphosphite, bisphenol A phosphite, and phenol-free liquid phosphite antioxidant.

[0030] Furthermore, the hindered phenol antioxidant includes at least one of antioxidant 1010 (pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), antioxidant 1076 (β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), and antioxidant 330 (1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene).

[0031] Furthermore, the mixed slurry of the polyurethane resin and the epoxy acrylic resin includes, by weight, 15-20 parts of polyether polyol, 6-9 parts of toluene diisocyanate, 1-1.7 parts of dimethylol propionic acid, 2-4 parts of hydroxyl saturated polyester resin, 0.01-0.02 parts of dibutyltin dilaurate, 0.8-1.2 parts of diethylene glycol, 1-1.5 parts of triethylamine, 1-3 parts of epoxy resin, 1-3 parts of acrylic acid, 0.02-0.06 parts of acrylic ester leveling agent, and 30-45 parts of ester solvent.

[0032] The ester solvent includes one or more of ethyl acetate, propyl acetate, butyl acetate and butanone; preferably ethyl acetate.

[0033] The present invention also provides a highly lightfast color texture pattern synthetic leather, which is made by using the above-mentioned highly lightfast color texture pattern synthetic leather preparation process;

[0034] From bottom to top, it includes a base fabric layer, a PVC layer, a color texture pattern layer, a transparent connecting layer, and a translucent light-resistant protective layer;

[0035] Among them, the thickness of the PVC layer is 0.2-0.3mm; the thickness of the color texture pattern layer is 5-12μm; the thickness of the transparent connecting layer is 15-25μm; and the thickness of the translucent light-resistant protective layer is 0.2-0.3mm.

[0036] The beneficial technical effects of the present invention are: on the one hand, the high lightfast color texture pattern synthetic leather prepared by the high lightfast color texture pattern synthetic leather preparation process of the present invention has a light fastness level of 4, which fully meets the requirements for automobile interior use; on the other hand, the high lightfast color texture pattern synthetic leather of the present invention adopts a pattern layer printed by a multi-pass gravure roller process, which has a natural simulation and more three-dimensional light-sensitive color texture, which improves the grade of synthetic leather products and enriches the expression of synthetic leather. In addition, the connecting layer of the present invention is transparent, and the light-resistant protective layer on the top surface is translucent, so that the high lightfast color texture pattern synthetic leather of the present invention has a matte effect, which further improves the texture of synthetic leather. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 1 is a schematic diagram of the appearance of the highly light-resistant color texture pattern synthetic leather according to Example 1 of the present invention. DETAILED DESCRIPTION

[0038] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific embodiments of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention. The reagents used in the present invention are all commercially available reagents.

[0039] Example 1

[0040] This embodiment 1 provides a highly lightfast color texture pattern synthetic leather A1, which comprises, from bottom to top, a base fabric layer, a PVC layer, a color texture pattern layer, a transparent connecting layer, and a translucent lightfast protective layer. It is prepared by the following highly lightfast color texture pattern synthetic leather preparation process:

[0041] S1. Preparation of transparent connecting layer:

[0042] The mixed slurry of polyurethane resin and epoxy acrylic resin is coated on the PET release film and dried in an oven to form a transparent connecting layer, wherein the oven temperature is 120°C, and the drying time is 3 minutes. The thickness of the prepared transparent connecting layer is 25 μm;

[0043] The mixed slurry of the polyurethane resin and the epoxy acrylic resin includes, by weight, 20 parts of polyether polyol (N210), 9 parts of toluene diisocyanate TDI, 1.7 parts of dimethylol propionic acid, 4 parts of hydroxyl saturated polyester resin, 0.01 parts of dibutyltin dilaurate, 1.2 parts of diethylene glycol, 1.3 parts of triethylamine, 2 parts of epoxy resin (E20), 2 parts of acrylic acid, 0.05 parts of acrylic ester leveling agent (BYK358N), and 30 parts of ethyl acetate, which is stirred evenly.

[0044] S2. Preparation of color texture pattern layer:

[0045] A color texture pattern layer is printed on the transparent connecting layer by a gravure printing machine, and the color texture pattern layer is printed by a multi-pass gravure roller process; the multi-pass gravure roller process includes a first gravure roller process and an N+1th gravure roller process, N is an integer greater than 0, and its specific value can be selected according to actual production needs without special restrictions. In this embodiment 1, N=2, and the thickness of the obtained color texture pattern layer is 7μm.

[0046] The depths of the gravure grooves distributed in different areas of the gravure roller in the first gravure roller process are different, so that the same ink is used to print different shades of color, thereby obtaining a color pattern with different shades of color, thereby creating a light perception change in the color pattern layer, and finally making the color pattern obtain a natural simulated light perception texture, thereby becoming a color texture pattern layer. The ink used in the first gravure roller process of this embodiment 1 is reddish brown, which is a polyurethane ink (Dainichi Seika Ink red ink V-185 and yellow ink V-151 are prepared according to a weight ratio of 2:1).

[0047] The gravure printing plate roller used in the present invention has four areas with different gravure groove depths arranged alternately on its circumferential surface, wherein the gravure groove depth of one area is 10 μm, the gravure groove depth of one area is 25 μm, the gravure groove depth of one area is 50 μm, and the gravure groove depth of one area is 80 μm. In addition, the four areas with different gravure groove depths are alternately arranged with flat areas to further enhance the level of pattern layer changes. The gravure groove of the present invention is a circular hole.

[0048] The gravure roller in the second gravure roller process may be the same as or different from the gravure roller in the first gravure roller process. For example, the gravure groove shape, position, and depth may be the same or different. The position of printing on the transparent connecting layer may be the same as the position of printing on the transparent connecting layer in the first gravure roller process, thereby further deepening and strengthening the color depth and light perception change of the color pattern layer, so that the texture of the color texture pattern layer has a more three-dimensional sense.

[0049] The position printed on the transparent connecting layer in the second gravure roller process can be staggered with the position printed on the transparent connecting layer in the first gravure roller process, thereby making the pattern shape of the color texture pattern layer more varied due to the degree and angle of superposition of the printing positions;

[0050] In addition, the ink color used in the second gravure roller process can be the same as or different from the ink color used in the first gravure roller process, thereby achieving that the color texture pattern layer of the present invention has the above-mentioned simulated texture while having more color level changes.

[0051] The gravure roller in the second gravure roller process of this embodiment 1 is the same as the gravure roller in the first gravure roller process, and the position where it is printed on the transparent connecting layer is staggered with the position where it is printed on the transparent connecting layer in the first gravure roller process; the ink used in the second gravure roller process of this embodiment 1 is bluish-gray, which is a polyurethane ink (Dainichi Seika ink, blue ink, white ink and black ink are mixed in a weight ratio of 1.5:1:1).

[0052] S3. Preparation of base fabric layer and PVC layer:

[0053] The bottom PVC resin slurry is coated on the base fabric layer, and dried in an oven at 130°C for 2 minutes to form a PVC layer on the base fabric layer. The thickness of the prepared PVC layer is 0.3 mm.

[0054] The base fabric layer used in this embodiment 1 is polyester;

[0055] The bottom PVC resin slurry includes 100 parts of PVC powder (Formosa Plastics S-70), 1 part of azodicarbonamide (Lingerby AC1000), 70 parts of dioctyl phthalate DOP, 5 parts of calcium zinc stabilizer (Guangzhou Yingsu New Materials T-550P), and 30 parts of filler CaCO3 (Bozhen BZ-1250).

[0056] S4. The colored texture pattern layer in S2 is laminated onto the PVC layer in S3 through a thermal lamination process, and the PET release film is removed at the same time; wherein the thermal lamination process is a hot roller lamination process, the hot roller temperature is 160°C, the hot roller speed is 10m / min, and the hot roller pressure is 0.35MPa.

[0057] S5. Preparation of translucent light-resistant protective layer:

[0058] By weight, 100 parts of PVC powder (Formosa Plastics S-70), 70 parts of plasticizer dioctyl phthalate DOP, 5 parts of calcium zinc stabilizer, 2 parts of tris[2.4-di-tert-butylphenyl]phosphite antioxidant, and 1 part of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] antioxidant were mixed and stirred to form a light-resistant protective layer slurry, and the light-resistant protective layer slurry was coated on the side of the transparent connecting layer in the above S4 away from the base fabric layer, and dried for 2 minutes at an oven temperature of 100°C to obtain a translucent light-resistant protective layer with a thickness of 0.3 mm, thereby preparing the high light-resistant color texture pattern synthetic leather A1 of Example 1.

[0059] Example 2

[0060] This embodiment 2 provides a highly light-resistant color texture pattern synthetic leather A2, which is different from the highly light-resistant color texture pattern synthetic leather A1 in embodiment 1 in that the added amounts of two antioxidants in the translucent light-resistant protective layer are different, and the other components and preparation steps are the same.

[0061] In the preparation of the semi-transparent light-resistant protective layer of Example 2, 5 parts of tris[2.4-di-tert-butylphenyl]phosphite antioxidant were added, and 3 parts of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate antioxidant were added.

[0062] Example 3

[0063] This embodiment 3 provides a highly light-resistant color texture pattern synthetic leather A3, which differs from the highly light-resistant color texture pattern synthetic leather A1 in embodiment 1 in that in the preparation of the transparent connecting layer in step S1, the addition amounts of the components in the mixed slurry of the polyurethane resin and the epoxy acrylic resin and the thickness of the transparent connecting layer are different, and the components of the translucent light-resistant protective layer, the addition amounts of the components and the thickness of the translucent light-resistant protective layer are different; the remaining components and preparation steps are the same.

[0064] In parts by weight, the mixed slurry of the polyurethane resin and epoxy acrylic resin in this embodiment 3 includes 15 parts of polyether polyol (N210), 6 parts of toluene diisocyanate TDI, 1 part of dihydroxymethylpropionic acid, 2 parts of hydroxyl saturated polyester resin, 0.02 parts of dibutyltin dilaurate, 0.8 parts of diethylene glycol, 1 part of triethylamine, 3 parts of epoxy resin (E20): 3 parts of acrylic acid: 0.02 parts of acrylic ester leveling agent (BYK358N), and 35 parts of ethyl acetate, which are stirred evenly to form a transparent connecting layer of this embodiment 3 with a thickness of 15 μm.

[0065] In parts by weight, the translucent light-resistant protective layer of this embodiment 3 includes, in parts by weight, 80 parts of PVC powder (Formosa Plastics S-70), 50 parts of plasticizer dioctyl phthalate DOP, 3 parts of calcium zinc stabilizer, 2 parts of tris[2.4-di-tert-butylphenyl] phosphite antioxidant, and 1 part of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], which are mixed and stirred to form a light-resistant protective layer slurry. The light-resistant protective layer slurry is coated on the side of the transparent connecting layer in the above S4 away from the base fabric layer, and dried at an oven temperature of 100°C for 2 minutes to obtain a translucent light-resistant protective layer with a thickness of 0.2 mm.

[0066] Example 4

[0067] This embodiment 4 provides a highly light-resistant color texture pattern synthetic leather A4, which is different from the highly light-resistant color texture pattern synthetic leather A1 in embodiment 1 in that the addition amount and thickness of each component of the PCV layer resin slurry are different, the addition amount and thickness of each component in the preparation of the translucent light-resistant protective layer are different, and the remaining components and preparation steps are the same.

[0068] In parts by weight, the resin slurry of the PCV layer described in this Example 4 includes 80 parts of PVC powder (Formosa Plastics S-70), 2 parts of azodicarbonamide (Linger Bay AC1000), a foaming agent, 50 parts of dioctyl phthalate DOP, a plasticizer, 8 parts of calcium zinc stabilizer (Guangzhou Yingsu New Materials T-550P), and 25 parts of filler CaCO3 (Bozhen BZ-1250). The thickness of the PCV layer coated on the base fabric is 0.2 mm.

[0069] In parts by weight, the preparation of the translucent light-resistant protective layer in this Example 4 includes 90 parts of PVC powder (Formosa Plastics S-70), 60 parts of plasticizer dioctyl phthalate DOP, 3 parts of calcium zinc stabilizer, 2 parts of tris[2.4-di-tert-butylphenyl]phosphite antioxidant, and 1 part of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene antioxidant. The thickness of the obtained translucent light-resistant protective layer is 0.25 mm.

[0070] Comparative Example 1

[0071] Comparative Example 1 provides a color texture pattern synthetic leather B1, which is different from the highly light-resistant color texture pattern synthetic leather A1 in Example 1 in that the antioxidant composition in the translucent light-resistant protective layer is different. The remaining components and preparation steps are the same.

[0072] In comparative example 1, when preparing the semi-transparent light-resistant protective layer, the antioxidant only contained tris[2.4-di-tert-butylphenyl]phosphite antioxidant, and the added amount was 3 parts.

[0073] Comparative Example 2

[0074] Comparative Example 2 provides a color texture pattern synthetic leather B2, which is different from the highly light-resistant color texture pattern synthetic leather A1 in Example 1 in that the antioxidant composition in the translucent light-resistant protective layer is different. The remaining components and preparation steps are the same.

[0075] In the preparation of the semi-transparent light-resistant protective layer in Comparative Example 2, the only antioxidant was β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate n-octadecyl ester antioxidant, and the added amount was 3 parts.

[0076] Comparative Example 3

[0077] Comparative Example 3 provides a color texture pattern synthetic leather B3, which is different from the highly light-resistant color texture pattern synthetic leather A1 in Example 1 in that the two antioxidants in the translucent light-resistant protective layer have the same composition but different addition ratios. The remaining components and preparation steps are the same.

[0078] When preparing the translucent light-resistant protective layer in Comparative Example 3, 1 part of tris[2.4-di-tert-butylphenyl]phosphite antioxidant and 1 part of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate antioxidant were used.

[0079] The highly lightfast color texture pattern synthetic leathers of Examples 1-4 and the color texture pattern synthetic leathers of Comparative Examples 1-3 were tested for color fastness to light.

[0080] Test method for color fastness to light: The color fastness to light test is tested according to ISO105-B06, and the total radiation energy of xenon light is 451.2KJ / m 2 As the test endpoint, the gray color change card is used for grade judgment, and the light fastness ≥ 4 meets the standard.

[0081] See Table 1 for specific test data.

[0082] Table 1: Light fastness test data of Examples 1-4 and Comparative Examples 1-3

[0083]

[0084] It can be seen from Table 1 that the color fastness to light of Examples 1-4 is 4, which can meet the color fastness to light requirement of synthetic leather for automobiles; while the color fastness to light of Comparative Examples 1-3 are 3, 3, and 3.5, respectively, which cannot meet the color fastness to light requirement of synthetic leather for automobile interiors.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A process for preparing highly light-resistant colored textured synthetic leather, characterized in that: The method comprises the following preparation steps: S1. Preparation of transparent connecting layer: The mixed slurry of polyurethane resin and epoxy acrylic resin is coated on the release film and dried in an oven to form a transparent connecting layer; S2. Preparation of color texture pattern layer: Printing a color texture pattern layer on the transparent connection layer by a gravure printing machine, wherein the color texture pattern layer is printed by a multi-pass gravure printing plate roller process; S3. Preparation of base fabric layer and PVC layer: Apply the bottom PVC resin slurry on the base fabric layer and dry it in an oven to form a PVC layer on the base fabric layer; S4. The color texture pattern layer in S2 is composited on the PVC layer by a thermal composite process, while removing the release film; S5. Preparation of translucent light-resistant protective layer: By weight, 80-100 parts of PVC powder, 50-70 parts of plasticizer, 3-8 parts of stabilizer, 2-5 parts of phosphite antioxidant and 1-3 parts of hindered phenol antioxidant are mixed and stirred to form a light-resistant protective layer slurry, and the light-resistant protective layer slurry is coated on the side of the transparent connecting layer in S4 away from the base fabric layer, and after drying in an oven, a translucent light-resistant protective layer is obtained, thereby making the high light-resistant color texture pattern synthetic leather.

2. The process for preparing highly light-resistant colored textured synthetic leather according to claim 1, characterized in that: The multi-pass gravure roller process in step S2 includes a first gravure roller process and an N+1th gravure roller process, where N is an integer greater than 0; Among them, the depths of the gravure grooves distributed in different areas on the gravure roller in the first gravure roller process are different; the gravure roller in the N+1th gravure roller process is the same as or different from the gravure roller in the first gravure roller process, and the position where it is printed on the transparent connecting layer is the same as or staggered with the position where it is printed on the transparent connecting layer in the first gravure roller process, and its ink color is the same as or different from the ink color used in the first gravure roller process.

3. The process for preparing highly light-resistant colored textured synthetic leather according to claim 2, characterized in that: The depth of the gravure groove is 10-80 μm.

4. The process for preparing highly light-resistant color texture pattern synthetic leather according to claim 2, characterized in that: The gravure groove is at least one of circular, diamond, square and rectangular.

5. The process for preparing highly light-resistant color texture pattern synthetic leather according to claim 1, characterized in that: The thermal compounding process in step S4 is a hot roller pressing process, the hot roller temperature is 160° C.-180° C., the hot roller speed is 5-20 m / min, and the hot roller pressure is 0.3-0.6 MPa.

6. The process for preparing highly light-resistant color texture pattern synthetic leather according to claim 1, characterized in that: In the step S5, the weight ratio of phosphite antioxidant to hindered phenol antioxidant is (2-5): (1-3).

7. The process for preparing highly light-resistant color texture pattern synthetic leather according to claim 1, characterized in that: The phosphite antioxidant includes at least one of tris[2.4-di-tert-butylphenyl]phosphite, triphosphite, bisphenol A phosphite, and phenol-free liquid phosphite antioxidant.

8. The process for preparing highly light-resistant color texture pattern synthetic leather according to claim 1, characterized in that: The hindered phenol antioxidant includes at least one of pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, n-octadecylβ-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, and 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene.

9. The process for preparing highly light-resistant color texture pattern synthetic leather according to claim 1, characterized in that: The mixed slurry of the polyurethane resin and the epoxy acrylic resin includes, by weight, 15-20 parts of polyether polyol, 6-9 parts of toluene diisocyanate, 1-1.7 parts of dimethylol propionic acid, 2-4 parts of hydroxyl saturated polyester resin, 0.01-0.02 parts of dibutyltin dilaurate, 0.8-1.2 parts of diethylene glycol, 1-1.5 parts of triethylamine, 1-3 parts of epoxy resin, 1-3 parts of acrylic acid, 0.02-0.06 parts of acrylic ester leveling agent, and 30-45 parts of ester solvent.

10. A highly light-resistant color texture pattern synthetic leather, characterized in that: Made by the preparation process of highly light-resistant color texture pattern synthetic leather according to any one of claims 1 to 9; From bottom to top, it includes a base fabric layer, a PVC layer, a color texture pattern layer, a transparent connecting layer and a translucent light-resistant protective layer.

Images