KR200325604Y1 - Multipurpose artificial leather complex string - Google Patents

Abstract

The present invention relates to a multi-purpose synthetic leather composite strap, which is a linear core material having low elongation and high toughness and a long strip-shaped synthetic leather material surrounding it in a bonded state. (I), wherein both ends of the material are folded inward, and the outer surface of the folded portion is bonded to each other. Composite strap according to the present invention can be used as a material of a variety of articles, such as shoes, clothing, ornaments, and since the core material is located inside the outer surface of the folded both ends of the material bonded to each other, the vertical cross section When viewed, it has a larger cross-sectional area than conventional synthetic resin composite strings, and thus has a large volume and excellent cushioning properties, thereby exhibiting a texture corresponding to or rather superior to natural leather strings. In addition, the low elongation and high toughness of the core core defects with the material exhibiting a large volume, thereby exhibiting high morphological stability, and the synthetic leather, which is the material of the material, can exhibit various colors and surface patterns, thereby exhibiting an excellent aesthetic feeling. have.

Description

Multi-Purpose Synthetic Leather Composite String {MULTIPURPOSE ARTIFICIAL LEATHER COMPLEX STRING}

The present invention relates to a multi-purpose synthetic leather composite strap of a novel structure, and more specifically, to fold the two end side ends of the sprip-shaped synthetic leather material surrounding the linear core material of low elongation and high toughness inwards with a constant width By adhering the outer surface to each other, it is possible to produce a variety of aesthetics with excellent shape stability, and provides a versatile synthetic leather composite string having excellent texture such as large volume and high cushioning properties.

Many items used in real life, such as shoes, clothing, ornaments, etc. are made of a variety of materials, for example, natural materials such as natural fibers, leather, artificial materials such as synthetic fibers, synthetic resins, composite materials such as these Used. In addition, these materials are transformed into various types of structures to manufacture the articles, one of which is a string.

The strap itself has various uses as well, as shown in FIGS. 1A-1C, two or more strands 100 are twisted together to form various strings 200 having another shape and shape, or in FIG. 2. As shown in the figure, the string 100 is woven in various forms with other linear materials 300 to form a band 400, or they may be woven into a woven form to form a cloth. The straps deformed in various forms may be used for the strings 200 to 400 of the sandal 500, for example, as shown in FIGS. 3A to 3C.

Such a string may be made of a number of fine fiber yarns made of natural fibers such as cotton, hemp, wool, or synthetic fibers such as polyester, nylon, etc., but these may be various types of strings, bands, and woven fabrics. When used for the same purposes as in Figures 3a to 3c made, etc., there is a problem such as morphological stability (including dimension stability, etc.) and aesthetics are inferior and easily stretched. As a material capable of exhibiting such form stability and aesthetics, leather straps have been preferred since the past, but are difficult to manage because they are expensive, difficult to exhibit various colors, and easily contaminated.

In recent years, composite straps have been developed and used in part to exhibit the advantages of leather straps at low cost. The composite strap is a narrow synthetic resin sheet that is coated with a core material of high tensile strength (very low elasticity). Such a composite strap can be manufactured in various forms because of its excellent shape stability and color, but does not have the same texture as the leather strap (suitable volume and cushioning), so that the article manufactured using the composite strap is rigid. There is a problem in that the contact of the human skin is inferior. In addition, the braid (braided braid) made by twisting two or more compound braids does not form a smooth curved surface of the knot due to the rigidity of the material and thus does not produce a natural aesthetic.

An object of the present invention is to solve the problems of the prior art and to solve the technical problems that have been requested from the past.

That is, the present invention, when used as a part or all of the material of the article, such as shoes, clothing, ornaments, while having excellent form stability, exhibits a superior texture or equivalent to the natural leather strap, and can produce a variety of aesthetics It is to provide a synthetic leather composite strap.

The present inventors manufactured composite strings of various structures and tested their physical properties such as shape stability, texture, and aesthetics. As described in the present invention, the present inventors deformed a thin sheet of synthetic leather into a unique shape to lower its elongation. It was found that the composite string produced by attaching to the strong linear core of Fig. Provides very excellent shape stability, texture, aesthetics, etc., and thus, the present invention was completed.

1A to 1C are perspective views of various types of strings made by twisting two or more strands of a composite string according to the present invention;

Figure 2 is a perspective view of a band made of a constant repetitive form by weaving the string of the composite string according to the present invention with another linear material;

3A-3C are perspective views of sandals made using the strings or bands of FIGS. 1B, 1C, and 2, respectively;

4a to 4e is a step diagram showing a process for producing a composite strap according to the present invention as a partial vertical cross-sectional view.

Explanation of symbols for main parts of the drawings

100: compound string

110: lumber

120: adhesive

130: heartwood

200: string

300: shipboard material

400: band

500: sandal

The multi-purpose synthetic leather composite strap of the present invention is a wire-shaped core material having low elongation and high toughness, and a long strip-shaped synthetic leather material surrounding it in a bonded state. Vi), wherein both ends of the material are folded inward and the outer surface of the folded part is bonded to each other.

The composite string according to the present invention having such a structure has a larger cross-sectional area compared to a conventional synthetic resin composite string when viewed in a vertical cross-section because the core is positioned inside the outer surface of the folded both ends of the material bonded to each other. It has a large volume and excellent cushioning properties, thereby exhibiting a texture corresponding to or rather superior to natural leather straps. In addition, the low elongation and high toughness of the core core defects with the material exhibiting a large volume, thereby exhibiting high morphological stability, and the synthetic leather, which is the material of the material, can exhibit various colors and surface patterns, thereby exhibiting an excellent aesthetic feeling. have.

The material of the linear core material is not particularly limited as long as it has a low elongation and high toughness, and examples thereof include polyethylene terephthalate fiber yarn, nylon and cotton blend yarn, their woven fabric, and high density cotton tape. It is not limited. The cross-sectional shape of the linear core member is also not particularly limited, and round, rectangular, and other polygonal shapes can all be used, and a rectangle of height (h) < width (w) is particularly preferable for expression of texture.

The synthetic leather material having a strip shape has a relatively large width so as to surround the linear core material. Materials of synthetic leather are known in the art, and examples thereof include, but are not limited to, solvent-based polyurethane synthetic leather, water-based polyurethane synthetic leather, and the like. In general, synthetic leather is composed of a base layer of a woven or nonwoven fabric, a silver layer, a top skin layer and the like, including an adhesive layer for mutual adhesion thereof. The adhesive layer is located between the base layer and the silver layer, or between the silver layer and the top skin layer, or between each of these layers. The base layer provides the mechanical strength of the entire synthetic leather, the silver layer provides the texture as leather, and the top skin layer forms the outer surface of the leather. However, in recent years, synthetic leather has been developed that provides physical properties as leather without having such a sequential structure. Moreover, the synthetic leather material required by the present invention does not necessarily have the physical properties required by the synthetic leather as a general material, and therefore, the synthetic leather defined in the present invention is not limited to the definition of general synthetic leather.

As described above, both ends of the workpiece are bonded to each other in a folded state. The size of the folded width of the end may be 1/30 to 1/2 of the size of the overall width. If the folded width is smaller than 1/30 of the total width, it may be difficult to adhere to each other while maintaining the folded state, and if the folded width is larger than 1/2, it may be undesirable because it may overlap with the folded portion at the opposite end. In some cases, in order to give a higher texture, you may make it 1/2 or more.

Since the composite strap according to the present invention can be produced in various sizes, the size of the core material and the material is not particularly limited.

Hereinafter, the structure and manufacturing process of the multi-purpose synthetic leather composite string according to the present invention will be described with reference to the drawings implemented in one embodiment, but the scope of the present invention is not limited thereto. To further facilitate understanding, some vertical cross-sections describe the structure and fabrication process of the composite strap and express them in approximate shape and size.

Referring to Figure 4a, a strip-shaped synthetic leather material 110 is shown. The upper surface 112 of the material 110 is dried to the inner surface of the composite string made later, the lower surface 114 is exposed to the outer surface. Therefore, the bottom surface 114 may be surface treated to exhibit a separate pattern or texture. The material 110 may be manufactured by cutting a sheet of synthetic leather (not shown) to a predetermined width.

Referring to FIG. 4B, the adhesive 120 is applied to the upper surface of the workpiece 110. Since the adhesive 120 is used for later bonding with the core material and bonding of the folded state of the end portion of the material 110, in some cases, the adhesive 120 is applied only to the end portion of the material 110, and the adhesive material is attached to the core material. 120 may be applied. The adhesive 120 is not particularly limited, but natural latex is particularly preferred. Since natural latex has low adhesiveness in a dry state after application, it is advantageous in process processing, and when heat is heated as necessary, it is preferable because it can exhibit high adhesive strength. Therefore, the natural latex adhesive 120 is applied to the material 110 and then dried (in some cases, thermally dried).

Referring to FIG. 4C, both ends 116 of the workpiece 110 are folded inward by a predetermined length and bonded to each other, thereby forming a folded portion 118. Adhesion of the folded end 116 is achieved by an adhesive applied to the upper surface of the workpiece 110, and when the natural latex adhesive 120 is applied and dried on the upper surface of the workpiece 110 in the process of FIG. In the state, adhesion can be performed by applying heat and pressure.

Referring to FIG. 4D, the core 110 is rolled inward so that the outer side 118A of the folded portion 118 faces each other, and the core 130 is positioned therein. An adhesive (not shown) may be applied to the outer surface of the core 130 as in the case 110 of FIG. 4B. Preferably, a dry core material 130 is used after applying natural lactex on the outer surface. Then, the outer side 118A of the folded portion 118 at both ends of the workpiece is coated with a separate adhesive 122 before rolling the workpiece 110 inward, or simultaneously rolling inward, or only inward. do. Adhesive 122 is applied to fold outside 118A and a portion of the inner side thereof. The adhesive 122 applied to the outer side of the folded portion 118 need not be the same as the adhesive 120 applied to the upper surface of the workpiece 110 or the outer surface of the core member 130. Preferably, the adhesive 122 having a higher adhesive strength than the adhesive 120 is preferable, and those known in the art as adhesives, and those having improved adhesion by appropriately mixing them or adding additional additives may be used. The process of FIG. 4D may be performed using a mold (not shown) having a curved surface corresponding to the curled shape of the workpiece 110. That is, the adhesive 122 is applied to the outer side 118A of the folded portion of the workpiece 110 while the workpiece 110 is moved on a molding frame in which the radius of curvature gradually decreases, and the inside of the workpiece 110 is dried. The core member 130 may be positioned at. At the final stage of the process using such a mold, both sides of the folded portion 118A of the workpiece 110 moving to the mold of very small radius of curvature will be in contact with each other.

Referring to FIG. 4E, the outer side 118A of the folded portions 118 at both ends of the workpiece 110 are bonded to each other, thereby forming a shape of the composite string 100 having the core 130 inserted therein. The composite string 100 of the shape is applied to the heat and pressure in order to further strengthen the adhesion of the workpiece 110 and the core 130 and the bonding between the two folded portions 118 of the workpiece. Although slightly exaggerated in FIG. 4E, the core material 130 and the material 110 have a space S spaced apart from each other, and the space S has a large volume of the composite string 100. Gives excellent cushioning and texture. In some cases, such a space (S) may not exist, but at least the folded portion 118 of the workpiece 110 provides an excellent texture.

The composite strap according to the present invention manufactured as such may be used as some materials such as shoes, clothing, ornaments, or the like, as shown in FIGS. Likewise in the form of a band, it can be used as some material of the articles as in FIGS. 3A-3C.

Those skilled in the art to which the present invention pertains will be capable of various modifications and applications based on the above contents, it is possible to add a well-known element to the separate physical properties or to improve the existing physical properties to the composite string according to the present invention And, it will be possible to add a separate additional process to improve the efficiency of the above-described manufacturing process for manufacturing it.

Claims (4)

A linear core material having low elongation and high toughness, and a long strip-shaped synthetic leather material surrounding the core material when it is bonded to the core material. A multi-purpose synthetic leather composite string, characterized in that both ends are folded and the outside of the fold on both ends is bonded to each other. The multi-purpose synthetic leather composite string according to claim 1, wherein the core is rectangular in height (h) < width (w) in a cross-sectional shape. The multi-purpose synthetic leather composite string according to claim 1, wherein the material is made of an oil-based polyurethane synthetic leather or an aqueous polyurethane synthetic leather. The multi-purpose synthetic leather composite string of claim 1, wherein the size of the folded width at both ends of the material is 1/30 to 1/2 of the total width.