Temperature indication type color-changing composite leather

Abstract

The utility model discloses a temperature indication type color-changing composite leather which comprises a base cloth layer, an adhesive layer, a lower surface layer, an upper surface layer and a surface treatment layer which are sequentially overlapped, the lower surface layer is a first resin layer containing a first pigment and a plurality of temperature-sensing color-changing powder, the upper surface layer is a second resin layer containing a second pigment, and the surface treatment layer is a second resin layer containing a second pigment. The first pigment is the same as the second pigment. The temperature indication type color-changing composite leather provided by the utility model can present different colors at different temperatures, and meanwhile, the wear resistance and the light resistance of a product are improved, so that the quality and the competitiveness of the product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of synthetic leather, in particular to a temperature indicating color-changing synthetic leather. Background Art

[0002] Leather products are widely used in daily life, such as shoes, bags, and sofas. With rising living standards, consumers are increasingly demanding the color, texture, and feel of leather products. Existing leather products are mostly monotonous in color and fail to respond to changes in ambient temperature, thus failing to meet user needs.

[0003] Chinese patent CN117166261A discloses a PU color-changing synthetic leather, which includes a base fabric layer, a foaming layer, a surface layer and a surface treatment layer, wherein the surface layer contains color-changing powder and laser powder, so that the product presents different colors from different angles.

[0004] However, since color-changing powder and laser powder are added to the surface layer, the roughness of the surface layer is increased, and the wear resistance of the product is reduced; the color-changing powder easily reacts to light, causing the product to turn yellow, and also reduces the light resistance of the product. Utility Model Content

[0005] In order to solve the above problems, the purpose of the utility model is to provide a temperature indicating color changing composite leather, which improves the wear resistance and light resistance of the product while ensuring the color change of the product.

[0006] Based on the above problems, the technical solution provided by the present invention is:

[0007] The temperature-indicating color-changing composite leather includes a base fabric layer, an adhesive layer, a lower surface layer, an upper surface layer and a surface treatment layer stacked in sequence. The lower surface layer is a first resin layer containing a first pigment and a plurality of temperature-sensitive color-changing powders. The upper surface is a second resin layer containing a second pigment. The first pigment is the same as the second pigment.

[0008] In some embodiments, the light transmittance of the upper surface layer is greater than that of the lower surface layer.

[0009] In some embodiments, the base fabric layer has a thickness of 0.9 to 1.1 mm.

[0010] In some embodiments, the thickness of the adhesive layer is 0.17 to 0.23 mm.

[0011] In some embodiments, the thickness of the lower surface layer is 30 to 50 μm.

[0012] In some embodiments, the thickness of the upper surface layer is 30 to 50 μm.

[0013] In some embodiments, the surface treatment layer has a thickness of 15 to 25 μm.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] An upper surface layer and a lower surface layer are stacked one above the other, both of which are resin layers. The lower surface layer contains a first pigment and a plurality of temperature-sensitive color-changing powders, and the upper surface layer contains a second pigment, which is the same as the first pigment. The added upper surface layer can improve the wear resistance and light resistance of the lower surface layer, thereby improving the quality and competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the temperature indicating color changing composite leather of the present invention;

[0018] in:

[0019] 1. Base fabric layer;

[0020] 2. Adhesive layer;

[0021] 3. Lower surface layer;

[0022] 4. Upper surface;

[0023] 5. Surface treatment layer. DETAILED DESCRIPTION

[0024] The above scheme is further described below with reference to specific examples. It should be understood that these examples are intended to illustrate the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer. The implementation conditions not specified are generally those used in routine experiments.

[0025] like Figure 1 , which is a schematic structural diagram of an embodiment of the present invention, provides a temperature indicating color-changing composite leather, comprising a base fabric layer 1, an adhesive layer 2, a lower surface layer 3, an upper surface layer 4 and a surface treatment layer 5 stacked in sequence.

[0026] The base fabric layer 1 is made of microfiber lining with a thickness of 0.9 to 1.1 mm.

[0027] The adhesive layer 2 is made of solvent-free, highly yellowing-resistant adhesive, and is used to bond the lower surface layer 3 and the base fabric layer 1 , with a thickness of 0.17 to 0.23 mm.

[0028] The lower surface layer 3 is a first resin layer containing a first pigment and a plurality of temperature-sensitive color-changing powders, with a thickness of 30-50 μm. This layer is formed by applying a lower surface coating liquid onto the adhesive layer and curing it. The lower surface coating liquid comprises 57.8%-61.5% polyurethane, 6%-9.7% first pigment, 2.8%-3.2% temperature-sensitive color-changing powder, and 28.4%-29.3% cosolvent. This allows the polyurethane to exhibit different colors at temperatures between 15°C and 30°C.

[0029] The upper surface layer 4 is a second resin layer containing a second pigment, with a thickness of 30 to 50 μm. It is formed by applying the upper surface coating liquid on the lower surface layer 3 and curing it. The components of the upper surface coating liquid include: 64.9% to 70.9% polyurethane, 1.5% to 2.5% second pigment, and 27.6% to 32.6% cosolvent. The first pigment contained in the lower surface layer 3 is the same as the second pigment contained in the upper surface layer. The provision of the upper surface layer 4 can reduce the roughness of the product and improve the wear resistance of the product. At the same time, it can reduce the light reaction of the temperature-sensitive color-changing powder and improve the light resistance of the product. Among them, the content of the second pigment is lower than the first pigment, so that the light transmittance of the upper surface layer 4 is greater than that of the lower surface layer 3, so that the lower surface layer 3 can present different color effects.

[0030] The surface treatment layer 5 is used to increase the wear resistance of the product and optimize the feel of the product. The thickness is 15 to 25 μm. The components of the surface treatment layer coating liquid include: 78% to 83% water-based polyurethane, 5% to 6.5% water-based feel additive, 5% to 6.5% water-based wear-resistant additive, 5% to 6% multifunctional modified polycarbodiimide crosslinker, 1.0% to 1.5% silicone surfactant, and 1.0% to 1.5% polyurethane thickener.

[0031] In summary, the color-changing leather adopts a double-layer surface structure, which enables the product to present different colors at different temperatures, while reducing the roughness of the product surface and improving the wear resistance and light resistance of the product.

[0032] The above examples are intended only to illustrate the technical concepts and features of this utility model. Their purpose is to enable those familiar with the art to understand the content of this utility model and implement it accordingly. They are not intended to limit the scope of protection of this utility model. Any equivalent changes or modifications based on the spirit of this utility model shall be included in the scope of protection of this utility model.

Claims

1. Temperature-indicating color-changing composite leather, comprising a base fabric layer, an adhesive layer, a lower surface layer, and a surface treatment layer, wherein the lower surface layer is a first resin layer containing a first pigment and a plurality of temperature-sensitive color-changing powders, characterized in that: An upper surface layer is provided between the lower surface layer and the surface treatment layer. The upper surface layer is a second resin layer containing a second pigment. The first pigment is the same as the second pigment. The light transmittance of the upper surface layer is greater than that of the lower surface layer.

2. The temperature indicating color changing leather according to claim 1, characterized in that: The thickness of the base fabric layer is 0.9-1.1 mm.

3. The temperature indicating color changing leather according to claim 1, characterized in that: The thickness of the adhesive layer is 0.17-0.23 mm.

4. The temperature indicating color changing leather according to claim 1, characterized in that: The thickness of the lower surface layer is 30 to 50 μm.

5. The temperature indicating color changing leather according to claim 1, characterized in that: The thickness of the upper surface layer is 30 to 50 μm.

6. The temperature indicating color changing leather according to claim 1, characterized in that: The thickness of the surface treatment layer is 15 to 25 μm.

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