Leather fabric with good wear resistance and production process thereof

Abstract

The application relates to the technical field of leather materials, and discloses a leather fabric with good wear resistance and a production process thereof. The leather fabric with good wear resistance comprises, from top to bottom, a leather layer, a foaming layer and a base cloth layer. The leather layer comprises the following components in parts by weight: 70 parts of polyurethane resin, 45-55 parts of dimethylformamide, 15-25 parts of ceramic fiber, 25-35 parts of ethylene-methyl acrylate copolymer, 1-2 parts of antioxidant and 1-3 parts of plasticizer. The ethylene-methyl acrylate copolymer comprises ethylene-methyl acrylate copolymer with a methyl acrylate content of 12wt%-18wt% and ethylene-methyl acrylate copolymer with a methyl acrylate content of 22wt%-27wt%. The technical scheme solves the problem of poor wear resistance of leather fabric in the related art.

Description

Technical Field

[0001] This invention relates to the field of leather materials technology, specifically to a leather fabric with good abrasion resistance and its production process. Background Technology

[0002] Leather is a material with unique texture and properties, widely used in footwear, bags, clothing, furniture, and other fields. Leather can be broadly classified into natural leather and synthetic leather. Natural leather, derived directly from animals, possesses a unique texture and durability, making it highly sought after. However, with the increasing demand for leather and growing focus on environmental protection and sustainable development, the limited supply of natural leather can no longer meet the demand. Therefore, to avoid relying on animal resources, people have gradually begun to synthesize leather using physical and chemical methods to mimic natural leather—that is, synthetic leather. Synthetic leather has relatively low cost, a more environmentally friendly production process, and can be mass-produced to meet widespread applications. However, synthetic leather still has some shortcomings. Compared to natural leather, synthetic leather has poor abrasion resistance, affecting its lifespan. Therefore, developing a leather fabric with good abrasion resistance is of great significance. Summary of the Invention

[0003] This invention proposes a leather fabric with good abrasion resistance and its production process, which solves the problem of poor abrasion resistance of leather fabrics in related technologies.

[0004] The technical solution of the present invention is as follows:

[0005] This invention proposes a leather fabric with good abrasion resistance, comprising a leather layer, a foam layer, and a base fabric layer arranged sequentially from top to bottom. The leather layer comprises the following components in parts by weight:

[0006] 70 parts polyurethane resin, 45-55 parts dimethylformamide, 15-25 parts ceramic fiber, 25-35 parts ethylene-methyl acrylate copolymer, 1-2 parts antioxidant, and 1-3 parts plasticizer;

[0007] The ethylene-methyl acrylate copolymer includes ethylene-methyl acrylate copolymers with a methyl acrylate content of 12wt% to 18wt% and ethylene-methyl acrylate copolymers with a methyl acrylate content of 22wt% to 27wt%.

[0008] As a further technical solution, the weight ratio of the ethylene-methyl acrylate copolymer with a methyl acrylate content of 12wt%~18wt% and the ethylene-methyl acrylate copolymer with a methyl acrylate content of 22wt%~27wt% is 1:2~5.

[0009] When the weight ratio of ethylene-methyl acrylate copolymer with methyl acrylate content of 12wt%~18wt% and ethylene-methyl acrylate copolymer with methyl acrylate content of 22wt%~27wt% is 1:2~5, the abrasion resistance of leather fabric can be improved.

[0010] As a further technical solution, the ceramic fiber is a non-ionic polyacrylamide modified ceramic fiber.

[0011] Surface modification of ceramic fibers using nonionic polyacrylamide can improve the dispersibility of ceramic fibers, increase the lubricity of the ceramic fiber surface, enhance its flexibility, and strengthen the interaction force with polyurethane resin, thereby further improving the abrasion resistance of leather fabrics and also improving the anti-cracking performance of leather fabrics.

[0012] As a further technical solution, the preparation method of the nonionic polyacrylamide modified ceramic fiber includes the following steps: dissolving the nonionic polyacrylamide in water to obtain a nonionic polyacrylamide solution, adding ceramic fiber to the nonionic polyacrylamide solution, stirring, concentrating, and obtaining the nonionic polyacrylamide modified ceramic fiber.

[0013] As a further technical solution, the weight ratio of the ceramic fiber to the nonionic polyacrylamide is 9~19:1.

[0014] When the weight ratio of ceramic fiber to nonionic polyacrylamide is 9~19:1, the abrasion resistance of leather fabric can be further improved.

[0015] As a further technical solution, the mass fraction of the nonionic polyacrylamide solution is 6%~12%.

[0016] As a further technical solution, the antioxidant is one or more of antioxidant 1010, antioxidant 168, and antioxidant 626.

[0017] As a further technical solution, the plasticizer is one or more of diisononyl phthalate, dibutyl phthalate, and dipropylheptyl phthalate.

[0018] As a further technical solution, the molecular weight of the nonionic polyacrylamide is 8 million to 22 million.

[0019] This invention also proposes a production process for a leather fabric with good abrasion resistance, comprising the following steps:

[0020] S1. The components in the leather layer are blended by weight and calendered to obtain the leather layer;

[0021] S2. After coating the lower surface of the leather layer with a foam layer, it is bonded to the base fabric layer to obtain the leather fabric with good wear resistance.

[0022] As a further technical solution, in step S1, the temperature during blending is 150~170℃.

[0023] The working principle and beneficial effects of this invention are as follows:

[0024] In this invention, the leather layer comprises two ethylene-methyl acrylate copolymers with methyl acrylate contents of 12wt%~18wt% and 22wt%~27wt%. Through the synergistic effect of these two ethylene-methyl acrylate copolymers with different methyl acrylate contents, the surface roughness of the leather fabric can be improved, and the stress on the leather fabric can be better dispersed, thereby improving the abrasion resistance of the leather fabric. Furthermore, the addition of ceramic fibers to the leather layer can also improve the abrasion resistance of the leather fabric. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] In the following examples and comparative examples, the polyurethane resin is model S-395A; the ceramic fiber is aluminosilicate ceramic fiber; the ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% is grade 1913; the ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt% is grade 1224; the ethylene-methyl acrylate copolymer with a methyl acrylate content of 9 wt% is grade 1609; the ethylene-methyl acrylate copolymer with a methyl acrylate content of 20 wt% is grade 1820; the ethylene-methyl acrylate copolymer with a methyl acrylate content of 30 wt% is grade 1330; the nonionic polyacrylamide is model FA920SH with a molecular weight of 8 million; and the base fabric is nonwoven fabric.

[0027] Example 1

[0028] A durable leather fabric comprises, from top to bottom, a leather layer, a foam layer, and a base fabric layer, wherein the leather layer comprises the following components in parts by weight:

[0029] 70 parts polyurethane resin, 45 parts dimethylformamide, 15 parts ceramic fiber, 25 parts ethylene-methyl acrylate copolymer, 1 part antioxidant 168, and 1 part diisononyl phthalate.

[0030] The ethylene-methyl acrylate copolymer comprises 13 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 12 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0031] Its production process includes the following steps:

[0032] S1. The components in the leather layer by weight are blended at 150°C and calendered to obtain the leather layer.

[0033] S2. After coating the lower surface of the leather layer with a foam layer, it is bonded to the base fabric layer to obtain a leather fabric with good wear resistance.

[0034] Example 2

[0035] A durable leather fabric comprises, from top to bottom, a leather layer, a foam layer, and a base fabric layer, wherein the leather layer comprises the following components in parts by weight:

[0036] 70 parts polyurethane resin, 50 parts dimethylformamide, 20 parts ceramic fiber, 30 parts ethylene-methyl acrylate copolymer, 1.5 parts antioxidant 168, 2 parts diisononyl phthalate;

[0037] The ethylene-methyl acrylate copolymer comprises 16 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 14 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0038] Its production process includes the following steps:

[0039] S1. The components in the leather layer by weight are blended at 160°C and calendered to obtain the leather layer.

[0040] S2. After coating the lower surface of the leather layer with a foam layer, it is bonded to the base fabric layer to obtain a leather fabric with good wear resistance.

[0041] Example 3

[0042] A durable leather fabric comprises, from top to bottom, a leather layer, a foam layer, and a base fabric layer, wherein the leather layer comprises the following components in parts by weight:

[0043] 70 parts polyurethane resin, 55 parts dimethylformamide, 25 parts ceramic fiber, 35 parts ethylene-methyl acrylate copolymer, 2 parts antioxidant 168, and 3 parts diisononyl phthalate.

[0044] The ethylene-methyl acrylate copolymer comprises 18 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 17 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0045] Its production process includes the following steps:

[0046] S1. The components in the leather layer by weight are blended at 170°C and calendered to obtain the leather layer.

[0047] S2. After coating the lower surface of the leather layer with a foam layer, it is bonded to the base fabric layer to obtain a leather fabric with good wear resistance.

[0048] Example 4

[0049] The only difference between this embodiment and Embodiment 2 is that the ethylene-methyl acrylate copolymer includes 4 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 26 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0050] Example 5

[0051] The only difference between this embodiment and Embodiment 2 is that the ethylene-methyl acrylate copolymer includes 10 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 20 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0052] Example 6

[0053] The only difference between this embodiment and Embodiment 2 is that the ethylene-methyl acrylate copolymer includes 5 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 25 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0054] Example 7

[0055] The only difference between this embodiment and Embodiment 6 is that the ceramic fiber is a non-ionic polyacrylamide modified ceramic fiber, and its preparation method includes the following steps: dissolving 3 parts of non-ionic polyacrylamide in water to obtain a non-ionic polyacrylamide solution with a mass fraction of 8%, adding 17 parts of ceramic fiber to the non-ionic polyacrylamide solution with a mass fraction of 8%, stirring, concentrating, and obtaining non-ionic polyacrylamide modified ceramic fiber.

[0056] Example 8

[0057] The only difference between this embodiment and Embodiment 7 is that the amount of ceramic fiber added is 19.5 parts, and the amount of nonionic polyacrylamide added is 0.5 parts.

[0058] Example 9

[0059] The only difference between this embodiment and Embodiment 7 is that 19 parts of ceramic fiber and 1 part of nonionic polyacrylamide were added.

[0060] Example 10

[0061] The only difference between this embodiment and Embodiment 7 is that 18 parts of ceramic fiber and 2 parts of nonionic polyacrylamide are added.

[0062] Comparative Example 1

[0063] The only difference between this comparative example and Example 1 is that the ethylene-methyl acrylate copolymer includes 13 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 9 wt% and 12 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0064] Comparative Example 2

[0065] The only difference between this comparative example and Example 1 is that the ethylene-methyl acrylate copolymer includes 13 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 20 wt% and 12 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 24 wt%.

[0066] Comparative Example 3

[0067] The only difference between this comparative example and Example 1 is that the ethylene-methyl acrylate copolymer includes 13 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 12 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 20 wt%.

[0068] Comparative Example 4

[0069] The only difference between this comparative example and Example 1 is that the ethylene-methyl acrylate copolymer includes 13 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 13 wt% and 12 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 30 wt%.

[0070] Comparative Example 5

[0071] The only difference between this comparative example and Example 1 is that the ethylene-methyl acrylate copolymer includes only 25 parts of ethylene-methyl acrylate copolymer with a methyl acrylate content of 20 wt%.

[0072] Comparative Example 6

[0073] The only difference between this comparative example and Example 1 is that ceramic fibers were not added.

[0074] Abrasion resistance tests were conducted on the leather fabrics with good abrasion resistance produced using the manufacturing processes of Examples 1-10 and Comparative Examples 1-6.

[0075] Leather fabric samples were prepared according to GB / T 39507-2020 "Determination of abrasion resistance of leather physical and mechanical tests: Martindale ball-disc method" and dry state test was performed. When four or more abrasion points of the coating appeared on the sample surface, the number of frictions at this time was recorded.

[0076] The test results are shown in Table 1 below:

[0077] Table 1 Test Results

[0078]

[0079] Compared to Comparative Examples 1-5, the leather fabric of Example 1 showed a significantly increased number of abrasion cycles, indicating that when the leather layer includes two ethylene-methyl acrylate copolymers with methyl acrylate contents of 12wt%~18wt% and 22wt%~27wt%, the synergistic effect of the two ethylene-methyl acrylate copolymers with different methyl acrylate contents can improve the abrasion resistance of the leather fabric. Compared to Comparative Example 6, the leather fabric of Example 1 also showed a significantly increased number of abrasion cycles, indicating that the addition of ceramic fibers to the leather layer can also improve the abrasion resistance of the leather fabric.

[0080] Compared to Examples 2 and 4, the leather fabrics of Examples 5 and 6 exhibited increased abrasion resistance, indicating that a weight ratio of ethylene-methyl acrylate copolymer with methyl acrylate content of 12wt% to 18wt% and ethylene-methyl acrylate copolymer with methyl acrylate content of 22wt% to 27wt% at 1:2 to 5 can improve the abrasion resistance of the leather fabric. Compared to Example 6, the leather fabrics of Examples 7 to 10 exhibited increased abrasion resistance, indicating that when the ceramic fiber is nonionic polyacrylamide-modified ceramic fiber, surface modification of the ceramic fiber using nonionic polyacrylamide can further improve the abrasion resistance of the leather fabric. Furthermore, compared to Examples 7 and 8, the leather fabrics of Examples 9 and 10 exhibited increased abrasion resistance, indicating that a weight ratio of ceramic fiber to nonionic polyacrylamide of 9 to 19:1 further improves the abrasion resistance of the leather fabric.

[0081] The abrasion-resistant leather fabrics produced using the manufacturing processes of Examples 6-10 were subjected to a tear strength test.

[0082] The tear strength of leather fabrics was determined in accordance with QB / T 2712-2005 "Physical and Mechanical Tests of Leather: Determination of Grain Strength and Elongation Height - Spherical Cracking Test".

[0083] The test results are shown in Table 2 below:

[0084] Table 2 Test Results

[0085]

[0086] Compared with Example 6, the tear strength of the leather fabrics in Examples 7-10 was significantly enhanced, indicating that when the ceramic fiber is modified with nonionic polyacrylamide, surface modification of the ceramic fiber with nonionic polyacrylamide can also improve the tear resistance of the leather fabric.

[0087] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A leather fabric with good abrasion resistance, characterized in that, It comprises, from top to bottom, a leather layer, a foam layer, and a base fabric layer, wherein the leather layer comprises the following raw material components in parts by weight: 70 parts polyurethane resin, 45-55 parts dimethylformamide, 15-25 parts ceramic fiber, 25-35 parts ethylene-methyl acrylate copolymer, 1-2 parts antioxidant, and 1-3 parts plasticizer; The ethylene-methyl acrylate copolymer includes an ethylene-methyl acrylate copolymer with a methyl acrylate content of 12wt% to 18wt% and an ethylene-methyl acrylate copolymer with a methyl acrylate content of 22wt% to 27wt%. The weight ratio of the ethylene-methyl acrylate copolymer with a methyl acrylate content of 12wt%~18wt% and the ethylene-methyl acrylate copolymer with a methyl acrylate content of 22wt%~27wt% is 1:2~5.

2. The leather fabric with good abrasion resistance according to claim 1, characterized in that, The ceramic fiber is a non-ionic polyacrylamide-modified ceramic fiber.

3. The leather fabric with good abrasion resistance according to claim 2, characterized in that, The preparation method of the nonionic polyacrylamide modified ceramic fiber includes the following steps: dissolving the nonionic polyacrylamide in water to obtain a nonionic polyacrylamide solution, adding ceramic fiber to the nonionic polyacrylamide solution, stirring, concentrating, and obtaining the nonionic polyacrylamide modified ceramic fiber.

4. The leather fabric with good abrasion resistance according to claim 3, characterized in that, The weight ratio of the ceramic fiber to the nonionic polyacrylamide is 9~19:

1.

5. The leather fabric with good abrasion resistance according to claim 1, characterized in that, The antioxidant is one or more of antioxidant 1010, antioxidant 168, and antioxidant 626.

6. The leather fabric with good abrasion resistance according to claim 1, characterized in that, The plasticizer is one or more of diisononyl phthalate, dibutyl phthalate, and dipropylheptyl phthalate.

7. The leather fabric with good abrasion resistance according to claim 3, characterized in that, The nonionic polyacrylamide has a molecular weight of 8 million to 22 million.

8. The manufacturing process of a leather fabric with good abrasion resistance according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1. The components in the leather layer are blended by weight and calendered to obtain the leather layer; S2. After coating the lower surface of the leather layer with a foam layer, it is bonded to the base fabric layer to obtain the leather fabric with good wear resistance.

9. The manufacturing process of a wear-resistant leather fabric according to claim 8, characterized in that, In step S1, the temperature during blending is 150~170℃.

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