Water-based skin-friendly regenerative ecological leather

Abstract

This utility model discloses a water-based, skin-friendly, regenerated eco-leather, comprising a composite regenerated leather layer and a skin-friendly fabric layer; the side of the regenerated leather layer away from the skin-friendly fabric layer is coated with a water-based polyurethane coating; the regenerated leather layer includes a needle-punched composite microfiber layer, a core-sheath polyester fiber layer, and a regenerated cowhide fiber layer; the core-sheath polyester fiber used in the core-sheath polyester fiber layer includes a leather layer and a core layer; the leather layer is LPET, and the core layer is PET. In this water-based, skin-friendly, regenerated eco-leather, the core-sheath polyester fibers in the regenerated leather layer penetrate into the regenerated cowhide fiber layer and the microfiber layer due to needle punching. The low-melting-point polyester in the leather layer bonds with the regenerated cowhide fibers after heating, thereby improving the bonding strength between the regenerated leather layer and the microfiber layer. Furthermore, the skin-friendly fabric layer enhances the performance of this regenerated eco-leather.

Description

Technical Field

[0001] This utility model relates to a water-based, skin-friendly, regenerated eco-leather, belonging to the field of regenerated leather technology. Background Technology

[0002] Leather is animal hide that has undergone physical and chemical processing, such as hair removal and tanning, to become deformed and less prone to decay. Leather is composed of tightly woven natural protein fibers in three-dimensional space, with a special grain layer on its surface, possessing a natural grain and luster, and a comfortable feel. However, due to the scarcity of natural leather, it is expensive. During leather production, scraps are generated, which, after processing, yield cowhide fibers. These cowhide fibers can be used to produce recycled leather to replace genuine leather, reducing costs. However, cowhide fibers are relatively short and coarse, resulting in recycled leather with a rough feel, poor comfort, and poor skin-friendliness; the shorter length of the recycled cowhide fibers also leads to lower fiber bonding strength. Furthermore, current leather production has environmental requirements, and using water-based coatings can improve the environmental friendliness of recycled leather. Therefore, how to produce a water-based, skin-friendly, recycled eco-leather has become a problem to be solved. Utility Model Content

[0003] The purpose of this invention is to provide a water-based, skin-friendly, regenerated eco-leather with a skin-friendly effect.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:

[0005] The present invention relates to a water-based skin-friendly regenerated eco-leather, comprising a composite regenerated leather layer and a skin-friendly fabric layer; the side of the regenerated leather layer away from the skin-friendly fabric layer is coated with a water-based polyurethane coating.

[0006] The regenerated leather layer comprises a needle-punched composite microfiber layer, a core-skin polyester fiber layer, and a regenerated cowhide fiber layer;

[0007] The core-sheath polyester fiber used in the core-sheath polyester fiber layer includes a sheath layer and a core layer; the sheath layer is LPET and the core layer is PET.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the skin-friendly fabric layer is woven from fine denier nylon core-spun yarn, the fine denier nylon core-spun yarn includes core yarn and covering yarn layer, the core yarn is high-strength nylon filament, and the covering yarn layer includes 30-45D / 48-9F fine denier nylon 6 filament.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the regenerated leather layer and the skin-friendly fabric layer are provided with a planar three-dimensional fabric layer.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the planar triaxial fabric layer is made of three groups of high-strength polyester filaments interwoven at a 60° angle.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: a hot stamping layer is provided on the outer side of the water-based polyurethane coating.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the coating layer further includes graphene-modified nylon 6 filament.

[0013] The beneficial effects of this utility model are as follows: In the water-based, skin-friendly regenerated eco-leather involved in this utility model, the core-type polyester fibers in the regenerated leather layer penetrate into the regenerated cowhide fiber layer and the microfiber layer due to needle punching. The low-melting-point polyester in the leather layer bonds with the regenerated cowhide fibers after heating, thereby improving the adhesion strength between the regenerated leather layer and the microfiber layer. Furthermore, the skin-friendly fabric layer enhances the performance of this regenerated eco-leather. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the water-based skin-friendly regenerated eco-leather involved in Example 1;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the core-sheath type polyester fiber involved in Example 1;

[0016] Figure 3 This is a schematic diagram of the structure of the water-based skin-friendly regenerating eco-leather involved in Example 2.

[0017] The markings in the diagram are explained as follows: 1-Regenerated leather layer; 11-Microfiber layer; 12-Core polyester fiber layer; 13-Regenerated cowhide fiber layer; 121-Leather layer; 122-Core layer; 2-Skin-friendly fabric layer; 3-Water-based polyurethane coating; 4-Planar three-dimensional fabric layer; 5-Hot stamping layer. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1

[0020] Combination Figure 1 and Figure 2 This embodiment will be described in detail below. The water-based, skin-friendly, regenerated eco-leather involved in this embodiment includes a composite regenerated leather layer 1 and a skin-friendly fabric layer 2; the side of the regenerated leather layer 1 away from the skin-friendly fabric layer 2 is coated with a water-based polyurethane coating 3. Specifically, it is composited using a hot melt adhesive web film, the material of which can be PA, PES, EVA, PI, or TPU; in this embodiment, TPU is selected.

[0021] The regenerated leather layer 1 comprises a needle-punched composite microfiber layer 11, a core-sheath polyester fiber layer 12, and a regenerated cowhide fiber layer 13. The fibers used in the regenerated cowhide fiber layer 13 are made from wet blue leather scraps and are relatively short. The core-sheath polyester fiber layer 12 comprises a leather layer 121 and a core layer 122; the leather layer 121 is LPET, and the core layer 122 is PET. LPET is a low-melting-point polyester with a melting point of approximately 100-110°C, while PET is a conventional polyester with a melting point of approximately 255°C.

[0022] The preparation of the regenerated leather layer 1 involves stacking a web-like microfiber layer 11, a core-sheath polyester fiber layer 12, and a regenerated cowhide fiber layer 13, followed by needle punching on both sides. This allows the core-sheath polyester fibers in the core-sheath polyester fiber layer 12 to be hooked into the microfiber layer 11 and the regenerated cowhide fiber layer 13 by the needles. Further heating causes the LPET in the leather layer 121 to melt, allowing it to adhere to the surrounding fibers. This improves the bonding strength of the fibers in the regenerated leather layer 1 and reduces shedding in the regenerated cowhide fiber layer 13.

[0023] Furthermore, the skin-friendly fabric layer 2 is woven from fine denier nylon core-spun yarn, which includes a core yarn and a covering layer. The core yarn is a high-strength nylon filament, and the covering layer includes 30-45D / 48-9F fine denier nylon 6 filament. The fine denier nylon 6 filament improves softness, while the high-strength nylon filament improves strength.

[0024] Example 2

[0025] Combination Figure 3 This embodiment will be described in detail below. The water-based, skin-friendly regenerated eco-leather involved in this embodiment differs from that in Embodiment 1 in that: the regenerated leather layer 1 and the skin-friendly fabric layer 2 are provided with a planar three-dimensional fabric layer 4. The planar three-dimensional fabric layer 4 is composed of three sets of high-strength polyester filaments interwoven at a 60° angle. Most woven fabrics are interwoven from yarns in two mutually perpendicular directions. When the fabric is subjected to a tensile force at a 45° angle to the warp or weft yarns, the tensile modulus of the woven fabric differs significantly from that when the fabric is subjected to warp or weft tensile force. However, the three-dimensional fabric, because it consists of three systems of yarns interwoven at a 60° angle, achieves isotropic properties. That is, regardless of the direction of the force applied to the three-dimensional fabric, its deformation is uniform in all directions. Therefore, the three-dimensional fabric does not have the weak points in shear and tensile strength found in two-dimensional fabrics. Furthermore, when the three-dimensional fabric is subjected to impact, its deformation exhibits uniform and equal strain. In this embodiment, a planar three-dimensional fabric with a basic structure is used.

[0026] Furthermore, another difference from Embodiment 1 is that the outer side of the waterborne polyurethane coating 3 is provided with a hot stamping layer 5.

[0027] Furthermore, the covering layer also includes graphene-modified nylon 6 filaments. Because this recycled eco-leather uses a large amount of chemically synthesized fibers, which are prone to static electricity, graphene-modified nylon 6 filaments are also incorporated into the covering layer. Graphene-modified nylon has a higher tensile strength than ordinary nylon; its resistivity is significantly lower than that of ordinary nylon, resulting in enhanced conductivity; and its moisture regain is greater than that of ordinary nylon.

[0028] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A water-based, skin-friendly, regenerating eco-leather, characterized in that, It includes a composite recycled leather layer (1) and a skin-friendly fabric layer (2); the recycled leather layer (1) has a water-based polyurethane coating (3) on the side away from the skin-friendly fabric layer (2). The regenerated leather layer (1) includes a needle-punched composite microfiber layer (11), a core-skin polyester fiber layer (12), and a regenerated cowhide fiber layer (13). The core-sheath polyester fiber used in the core-sheath polyester fiber layer (12) includes a sheath (121) and a core (122); the sheath (121) is LPET and the core (122) is PET.

2. The water-based, skin-friendly, regenerating eco-leather according to claim 1, characterized in that, The skin-friendly fabric layer (2) is woven from fine denier nylon core-spun yarn. The fine denier nylon core-spun yarn includes a core yarn and a covering yarn layer. The core yarn is a high-strength nylon filament, and the covering yarn layer includes 30-45D / 48-9F fine denier nylon 6 filament.

3. The water-based, skin-friendly, regenerating eco-leather according to claim 1, characterized in that, The regenerated leather layer (1) and the skin-friendly fabric layer (2) are provided with a planar three-dimensional fabric layer (4).

4. The water-based, skin-friendly, regenerating eco-leather according to claim 3, characterized in that, The planar triaxial fabric layer (4) is made of three groups of high-strength polyester filaments interwoven at a 60° angle.

5. The water-based, skin-friendly, regenerating eco-leather according to claim 4, characterized in that, A hot stamping layer (5) is provided on the outer side of the water-based polyurethane coating (3).

6. The water-based, skin-friendly, regenerating eco-leather according to claim 2, characterized in that, The coating layer also includes graphene-modified nylon 6 filaments.

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