Composite double-sided leather grain leather

Abstract

The composite double-sided leather grain comprises composite double-sided leather grain and is characterized in that a composite leather body comprises an upper layer, a middle layer and a lower layer, the upper surface of the middle layer is compounded with the lower surface of the upper layer, and the lower surface is compounded with the upper surface of the lower layer; the middle layer is made of leather, the upper layer is made of PU, and the surface energy of the material used by the lower layer is larger than or equal to 38 dynes. And through targeted optimization of the leather, the leather gluing effect is successfully enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a leather, especially relates to a composite double -sided skin grain leather. BACKGROUND

[0002] Leather is used as insole, usually one side of leather is compounded polyurethane layer to enhance the elasticity and durability of insole, and the other side is connected with shoe body through gluing process to realize the fixed assembly of insole. However, in actual production and application process, the gluing effect of part leather substrate is poor, and the leather and shoe body are easily separated from each other. For example, the glue is easily absorbed by fiber on soft tanning flesh leather, and the surface glue amount is insufficient. The surface of hard leather is dense and smooth, and the oil wax leather contains wax coating, and the surface energy of the two is extremely low, so ordinary glue is difficult to soak and adhere, and is easy to appear bead shrinkage and delamination. In view of the above technical problems, the gluing effect of leather is successfully improved through targeted optimization of leather. SUMMARY

[0003] In view of the existing technical deficiencies, the utility model provides a composite double -sided skin grain leather.

[0004] In order to realize the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a composite double -sided skin grain leather, characterized by comprising a composite double -sided skin grain leather, wherein the composite double -sided skin grain leather comprises an upper layer, a middle layer and a lower layer, the upper surface of the middle layer is compounded with the lower surface of the upper layer, and the lower surface of the middle layer is compounded with the upper surface of the lower layer; the material used in the middle layer is leather, the material used in the upper layer is PU, and the surface energy of the material used in the lower layer is greater than or equal to 38 dynes / cm.

[0005] The utility model has the beneficial effects that the utility model provides a composite double -sided skin grain leather, the material with surface energy greater than or equal to 38 dynes / cm is used in the lower layer of the composite double -sided skin grain leather, compared with the substrate such as hard leather and oil wax leather with low surface energy, the soaking and adhering effect of glue can be greatly improved, and the problems of bead shrinkage and delamination can be avoided. Also, the defect that the surface glue amount of soft tanning flesh leather is insufficient due to the absorption of glue by fiber can be solved, and the firm connection between the composite double -sided skin grain leather and shoe body is ensured. The middle layer of the composite double -sided skin grain leather is leather substrate, and the upper layer is compounded with PU material, so that the texture and performance of leather itself are retained, and the elasticity and durability of the composite double -sided skin grain leather are enhanced through the PU layer, which meets the use requirements of insole and other products. BRIEF DESCRIPTION OF DRAWINGS

[0006] The utility model will be further described below in combination with the drawings and examples, and the drawings are as follows:

[0007] Fig. 1 It is the structural schematic diagram of the utility model;

[0008] Fig. 2 It is the structural schematic diagram of the middle layer; DETAILED DESCRIPTION

[0009] The utility model will be made further detailed explanation in combination with the drawings and specific embodiment, but the embodiment does not make any form of limitation to the utility model.

[0010] As Figs. 1-2 Indicated:

[0011] A composite double-face skin grain leather, comprising a composite double-face skin grain leather 100, characterized in that the composite double-face skin grain leather 100 comprises an upper layer 110, a middle layer 120 and a lower layer 130, the upper surface of the middle layer 120 is combined with the lower surface of the upper layer 110, the middle layer 120 of the composite double-face skin grain leather is a leather base material, and the upper layer 110 is a PU material, which not only retains the texture and performance of the leather itself, but also enhances the elasticity and durability of the composite double-face skin grain leather through the PU layer, and meets the use requirements of insoles and other products.

[0012] The lower surface of the middle layer 120 is combined with the upper surface of the lower layer 130, and the material used for the lower layer 130 has a surface energy of ≥38 dynes / cm, which can greatly improve the infiltration and adhesion effect of the glue on the lower surface of the leather, and avoid the problems of bead shrinkage and delamination; the material used for the lower layer 130 is preferably PU or TPU hot melt adhesive film, and the surface energy of these two materials is easy to control, which can easily reach more than 38 dynes / cm.

[0013] The upper and lower surfaces of the middle layer 120 are provided with a plurality of through holes 121, by providing through holes 121 on the surface of the leather, the adhesive medium (such as adhesive) of the upper layer PU and the lower layer high surface energy material can penetrate into the inside of the through holes, forming a double fixing effect of "mechanical engagement + adhesive combination", improving the bonding force between the three layers, and preventing the problem of interlayer separation during use.

[0014] The upper surface of the upper layer 110 is provided with a simulated grain, which makes the appearance more beautiful and meets the market demand; the lower surface of the lower layer 130 is provided with an abrasive grain, which can further enhance the gluing effect.

[0015] The thickness of the upper layer 110 and the lower layer 130 is 0.05mm to 0.2mm, preferably 0.1mm, too thick affects the texture of the leather, and too thin affects the performance of the composite material.

[0016] The above composite process can be selected according to actual needs, such as wet method, veneer, dry method veneer, etc.

[0017] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0018] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A composite double-sided leather texture, comprising composite double-sided leather texture (100), characterized in that, The composite double-sided leather (100) includes an upper layer (110), a middle layer (120) and a lower layer (130). The upper surface of the middle layer (120) is composite with the lower surface of the upper layer (110), and the lower surface is composite with the upper surface of the lower layer (130). The material of the middle layer (120) is leather, the material of the upper layer (110) is PU, and the surface energy of the material of the lower layer (130) is ≥38 dynes / cm.

2. The composite double-sided leather texture as described in claim 1, characterized in that, The upper and lower surfaces of the middle layer (120) are provided with a number of through holes (121).

3. A composite double-sided leather texture as described in claim 1 or 2, characterized in that, The upper surface of the upper layer (110) is provided with simulated texture, and the lower surface of the lower layer (130) is provided with frosted texture.

4. A composite double-sided leather texture as described in claim 1 or 2, characterized in that, The lower layer (130) material is PU or TPU hot melt adhesive mesh.

5. A composite double-sided leather texture as described in claim 1 or 2, characterized in that, The upper layer (110) has a thickness of 0.05 mm to 0.2 mm; the lower layer (130) has a thickness of 0.05 mm to 0.2 mm.

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