Composite member including natural leather

Abstract

To provide a composite member including an easy-to-use natural leather.SOLUTION: A composite member 1 includes a fiber layer 11 and a lining layer 12, and the fiber layer 11 and the lining layer 12 are bonded through an adhesion layer 13.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a composite member containing natural leather. [Background technology]

[0002] Conventionally, natural leather has been widely used for many purposes such as shoes, bags, sacks, belts, etc. Furthermore, a technique for dividing natural leather into thin pieces for use in the above purposes has been disclosed (Patent Document 1).

[0003] Furthermore, scraps generated in the manufacture of leather products are usually discarded, but a technology has been disclosed for reprocessing them and reusing them as leather boards (Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jikko No. 63-42105 [Patent Document 2] Patent No. 2516846 Summary of the Invention [Problem to be solved by the invention]

[0005] Natural leather is composed of the surface layer called the grain side and the split leather, and the grain side has high tear strength, while the split leather has relatively low tear strength. Therefore, among the thinly divided natural leathers, only the grain side, which has high tear strength, is used for the above-mentioned purposes, while the split leather is discarded without being used.

[0006] It is also possible to recycle natural leather scraps to produce leather boards, but this has the problem of having low tear strength, limiting its use to book covers, shoe insoles, etc.

[0007] Even the grain side of natural leather needs to be thick enough (for example, about 1.0 mm or more) to maintain tear strength and appearance, which means that the grain side of natural leather is generally heavier than synthetic leather or artificial leather.

[0008] The present invention has been made in view of the above problems, and its object is to provide a composite member containing easy-to-use natural leather. [Means for solving the problem]

[0009] A composite member according to one aspect of the present invention comprises a fiber layer and a backing layer, and the fiber layer and the backing layer are bonded together via an adhesive layer. [Effects of the Invention]

[0010] According to the present invention, natural leather can be easily utilized. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a partially enlarged cross-sectional view of the composite material 1. As shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] FIG. 1 is a partially enlarged cross-sectional view of a composite material 1 according to an embodiment of the present invention.

[0013] As shown in FIG. 1, the composite member 1 has a fiber layer 11 and a backing layer 12 bonded to one side thereof via an adhesive layer 13 .

[0014] [Fiber layer] The fiber layer 11 is, for example, split leather. Natural leather is divided into thin layers for use in shoes, bags, sacks, belts, etc. Specifically, it is divided between the nipple layer and the reticular layer of the natural leather. The part including the nipple layer is used for the above-mentioned uses and is called the grain side. The other part, including the reticular layer and subcutaneous tissue, is called split leather and has weaker tear strength than the grain side.

[0015] The method for producing split leather is not particularly limited, and known methods can be used. For example, split leather can be obtained by dehairing the epidermis of an animal, dividing it into an upper layer from the epidermis to the upper part of the reticular layer and a lower layer below the upper part of the reticular layer, and then subjecting the lower layer to post-processing such as tanning, re-tanning, neutralization, dyeing, fat-adding, drying, buffing, and pressing. The subcutaneous tissue may also be removed.

[0016] In the above, the splitting method is not particularly limited, and known methods such as lime split (leather split into two layers after liming) and wet blue split (leather split into two layers after chrome tanning) can be used.

[0017] The fiber layer 11 can also be, for example, a leather board. Here, a leather board refers to a plate-shaped member made by collecting scraps of natural leather and solidifying them with resin. The method for manufacturing a leather board is not particularly limited, and a known method can be used. For example, the leather board can be obtained by beating scraps of natural leather in water to disperse them into fibers, adding a synthetic resin adhesive, and dehydrating, compressing, molding, drying, etc., the dispersion.

[0018] The fiber layer 11 (for example, split leather or leather board) may be derived from any animal, such as a mammal, such as a cow, sheep, goat, pig, horse, kangaroo, elephant, rabbit, deer, cat, dog, leopard, raccoon dog, fox, weasel, marten, mink, camel, reindeer, fur seal, or seal; a bird, such as an ostrich; or a reptile, such as a sea turtle, monitor lizard, python, or crocodile.

[0019] The thickness of the fiber layer 11 is not particularly limited, and since it is derived from natural animals, it will vary depending on the type and individual animal from which it is harvested, and even the part from which it is harvested. However, the thickness of the fiber layer 11 is preferably 0.5 to 1.0 mm. Unlike grain leather, split leather and leather board are less likely to change in appearance even at such a thickness, so with such a thickness, a composite member 1 that is lighter than grain leather while maintaining its appearance can be manufactured.

[0020] [Backing layer] The backing layer 12 may be a woven fabric made of natural fibers such as cotton, silk, or wool, or synthetic fibers such as rayon, polyester, acrylic, or nylon, or a mixture of these, or may be a nonwoven fabric or plastic foam. The backing layer 12 is not particularly limited as long as it can provide reinforcement.

[0021] [Adhesive layer] The adhesive layer 13 is, for example, a thermoplastic film. The thermoplastic film melts by thermocompression bonding, and part of it penetrates into the uneven surfaces of the fiber layer 11 and the backing layer 12, and the fiber layer 11 and the backing layer 12 are bonded together by their anchoring effect.

[0022] The material of the thermoplastic film is not particularly limited, but examples thereof include vinyl chloride resin, vinyl acetate resin, synthetic rubber, natural rubber, acrylic resin, epoxy resin, urethane resin, and chloroprene resin.

[0023] [Example] The present invention will now be described in more detail.

[0024] Example 1 Example 1 is a composite material 1 in which split leather as a fiber layer 11 and nonwoven fabric as a lining layer 12 are bonded together with an adhesive layer 13. The split leather has a thickness of 0.75 to 0.8 mm. The nonwoven fabric has a thickness of 0.7 to 0.8 mm. The composite material 1 has a size of 10 cm x 10 cm and a thickness of 1.45 to 1.55 mm.

[0025] Example 2 Example 2 is a composite member 1 in which a leather board as a fiber layer 11 and a nonwoven fabric as a backing layer 12 are bonded together with an adhesive layer 13. The thickness of the leather board is 0.5 to 0.7 mm. The thickness of the nonwoven fabric is 0.8 to 1.0 mm. The size of the composite member 1 is 10 cm x 10 cm, and its thickness is 1.45 to 1.55 mm.

[0026] (evaluation) The weights and tear strengths of Examples 1 and 2 are shown in Table 1. The tear strength was measured in accordance with the method of JIS K6550. [Table 1]

[0027] As shown in Table 1, the composite members 1 of both Examples 1 and 2 were lightweight and exhibited sufficient tear strength.

[0028] [Applications of composite materials] The composite material 1 can be used in a wide variety of applications where natural leather is used, specifically, it is preferably used as a leather material for clothing, shoes, bags (e.g., school bags), miscellaneous goods, furniture (e.g., chairs, sofas), vehicle interiors, etc.

[0029] [Supplementary explanation of the embodiment]

[0030] The above-described embodiments each show a preferred specific example of the present invention. The numerical values, components, arrangement positions and connection order of components, processing order in flowcharts, etc. shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, each figure is not necessarily a strict illustration.

[0031] [Note] The contents of the above-described embodiments can be understood, for example, as follows.

[0032] (1) The composite member 1 described above includes a fiber layer 11 and a backing layer 12, The fiber layer 11 and the backing layer 12 are bonded together via an adhesive layer 13 .

[0033] With this configuration, by reinforcing the fiber layer 11 with the backing layer 12, a composite member 1 with high tear strength can be obtained.

[0034] (2) Floor leather The textile layer 11 may be split leather.

[0035] With this configuration, regardless of the split leather's weak tear strength, by reinforcing it with the backing layer 12, it is possible to obtain a composite material 1 with tear strength as strong as that of the grain leather. Furthermore, because the composite material 1 has strong tear strength, split leather that would otherwise be discarded due to its weak tear strength can be effectively utilized, thereby contributing to the realization of the "responsible consumption and production" principle of the SDGs (Sustainable Development Goals) by reducing waste. Furthermore, because split leather is cheaper than grain leather, it can reduce the manufacturing costs of leather products.

[0036] (3) Leather board The fibrous layer 11 may be a leather board.

[0037] With this configuration, regardless of the leather board's weak tear strength, by reinforcing the leather board with the backing layer 12, it is possible to obtain a composite member 1 with tear strength as strong as that of the grain surface. Furthermore, because the composite member 1 has strong tear strength, it is possible to widely utilize leather boards, which have previously been limited in their uses due to their weak tear strength. Furthermore, because leather boards are cheaper than grain surfaces, it is possible to reduce the manufacturing costs of leather products.

[0038] (4) Thickness The thickness of the fiber layer 11 can be set to 0.5 to 1.0 mm.

[0039] With this configuration, the composite material 1 maintains its tear strength and appearance while being lighter than the grain surface of natural leather. [Explanation of symbols]

[0040] 1 Composite materials 11 Fiber layer 12 Backing layer 13 Adhesive layer

Claims

1. A fabric layer and a backing layer are provided, The fiber layer and the backing layer are bonded via an adhesive layer. A composite member characterized by:

2. 2. The composite member according to claim 1, The fiber layer is split leather A composite member characterized by:

3. 2. The composite member according to claim 1, The fiber layer is a leather board A composite member characterized by:

4. The composite member according to any one of claims 1 to 3, The thickness of the fiber layer is 0.5 to 1.0 mm. A composite member characterized by:

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