JP3717222B2 - Synthetic leather - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin leather used for furniture covering materials, bags, automobile interior materials, seat sheet materials, and the like.
[0002]
[Prior art]
Conventionally, this type of leather is provided with a synthetic resin layer such as a vinyl chloride resin sheet on one side of a base fabric such as a woven fabric, a nonwoven fabric, a raised fabric, or a knitted fabric.
[0003]
[Problems to be solved by the invention]
However, these leathers lacked elasticity and flexibility, lacked volume and softness, and were not good in texture.
[0004]
The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a high-quality soft leather equivalent to the conventional physical properties, despite the fact that it is voluminous and has a good texture and light weight. Is.
[0005]
[Means for Solving the Problems]
Means taken by the present invention to solve the above problems is that a synthetic resin layer is provided on one side of a pile-knitted base fabric or a synthetic resin layer is provided on the pile surface of a single-side pile-knitted base fabric, Furthermore, twisted loop portions are formed on these pile surfaces, or the twisted loop portions are formed alternately every other length and width, and the synthetic resin layer is a foamed layer made of long fibers whose base fabric is processed by Woolley. And that the long fibers are polyester long fibers.
[0006]
According to the above configuration, the present invention provides a leather having a volume feeling, a light weight, and a high-quality soft feeling.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. A synthetic resin leather provided with a synthetic resin layer B on one side of a pile knitted base fabric A, the base fabric A being double-sided pile knitted or single-sided pile knitted. In the case of double-sided pile knitting (FIG. 1C), the synthetic resin layer B is provided on either one of the pile surfaces, but in the case of single-sided pile knitting, the pile surface (FIG. 1a, b) or The synthetic resin layer B is provided on the fabric surface. Further, the twisted loop portion 1 is formed on the surface yarn a of the pile knitting of the base fabric A, the synthetic resin layer B is provided on the surface of the twisted loop portion 1, and the twisted loop portion 1 is formed. Since the base fabric A or the base fabric A that does not form the twisted loop portion 1 is composed of short fibers or long fibers that have been subjected to Wool processing, and the synthetic resin layer has a foamed layer, the texture is extremely good.
[0008]
The base fabric A is well known in this kind of technical field such as fly spill, sinker pile, smooth spill, deer pile, inlay pile using long fibers or short fibers singly or blended with fibers such as cotton yarn, polyester, nylon, rayon, etc. The pile space is formed by double-sided pile knitting or single-sided pile knitting, and the number of loops is generally 70 to 85 in the vertical direction and 10 to 125 in the horizontal direction per 10 cm. Although the synthetic resin layer B is provided on one side of the base fabric A, more preferably, the smaller the adhesion point between the base fabric A and the synthetic resin layer B and the larger the space, the softer the pile surface or A synthetic resin layer B is provided on the twisted loop surface. Therefore, the twisted loop portion 1 is formed on the pile surface, that is, the surface yarn a of the pile knitting to improve the soft feeling. It is optional to provide this twisted loop portion 1 between all the loops of the surface yarn a, but preferably it is alternately formed in every other loop in a state where the vertical and horizontal directions are shifted as shown in FIG. The synthetic resin layer B is joined to the tip of the twist loop portion.
[0009]
When the fiber in the base fabric A is short fiber, it is # 30 or # 40 single yarn, and in the case of long fiber, it is generally 50-150 denier, 15-50 filament, but on the relationship between soft feeling and strength, Preferably, it is made of a material of 70 to 80 denier and 20 to 30 filaments, and when a soft feeling is desired, preferably a long fiber is used for the material, but a wooly processed long fiber is more preferable. In addition, when used for automobile interior materials, polyester is preferable from the viewpoint of imparting durability and flame retardancy.
[0010]
Synthetic resin layer B is a thin film layer made of a synthetic resin such as vinyl chloride resin, EMMA, TPO, polyurethane, EVA, polyethylene, etc., well known in this technical field, and is a non-foamed layer (Fig. 1, A, C). Even if there is a foam layer (Fig. 1 b), in the case of a foam layer, foaming by mixing a foaming agent into the synthetic resin, or mechanically foaming without mixing the foaming agent, High foaming with uniform cells is good, and the skin layer 2 is formed extremely thin on the surface of the foamed layer.
[0011]
Lamination of the base fabric A and the synthetic resin layer B is performed by thermocompression bonding or thermocompression bonding with an adhesive while the pile or twisted loop portion 1 of the base fabric is kept in an upright state, and more preferably at room temperature via an adhesive. The soft feeling is increased by reducing the number of adhesion points. In this case, it becomes possible by applying an adhesive to the synthetic resin layer B side and pressing it at room temperature.
[0012]
The twisted loop portion 1 is provided with the surface yarn a of the base fabric A in a twisted state and a raised state between the loops to maintain and improve elasticity, cushioning properties, etc. Are alternately formed to reduce the number of joints with the synthetic resin layer B and to provide a recovery force when the hair falls.
[0013]
The skin layer 2 is a skin layer made of the same resin as the resin of the synthetic resin layer B in order to retain the surface protection, strength maintenance, and touch of the synthetic resin layer B. Applying and laminating with the synthetic resin layer B, or applying laminating pattern or printing pattern after laminating.
[0014]
【Example】
An example of the implementation of the present invention is as follows. Using 75-denier, 24-filament Woolley polyester fibers, the number of loops per 10 cm is 78-79 in the vertical direction, 118-119 in the horizontal direction, and as shown in FIG. Also, a single-sided pile knitted base fabric is formed by fly-spyling so that each loop is alternately twisted and raised to form a raised twisted loop portion. An adhesive mixed at a ratio of diisocyanate 1 with respect to the ester-based prepolymer 9 is applied to the pile surface side of the base fabric at a dry conversion of 3 g / m ² .
[0015]
Next, a vinyl chloride resin having the following composition is formed by calendering and pressed onto the pile surface side of the base fabric.
Vinyl chloride resin (degree of polymerization 1100) 100 parts by weight plasticizer (DOP) 90 parts by weight stabilizer (Ba-Zn fatty acid salt system) 4 parts by weight filler (CaCo ₃ ) 20 parts by weight flame retardant (Sb ₂ O ₃ ) 3 Part by weight Foaming agent (ADCA) 3 parts by weight Pigment 2 parts by weight
Further, a 0.2 mm skin layer having the following composition is obtained by calendering, and then thermally laminated on the vinyl chloride resin layer.
Vinyl chloride resin (degree of polymerization 1100) 100 parts by weight plasticizer (DOP) 90 parts by weight stabilizer (Ba-Zn fatty acid salt system) 4 parts by weight pigment 2 parts by weight filler 20 parts by weight flame retardant (Sb ₂ O ₃ ) 3 Weight part [0017]
The laminate as described above is heated in a non-pressurized state, and a vinyl chloride resin layer containing a foaming agent is formed into a layer having a foaming ratio of 3 times (thickness 0.6 mm), subjected to drawing and printing processing, surface design, slipping Adjust the feeling.
[0018]
【The invention's effect】
In the present invention, since a synthetic resin layer is provided on one side of a pile knitted base fabric, a space between the fibers of the pile knitting can be obtained, and a lightweight and soft leather with a good texture can be obtained. The pile on the surface without the layer gives a volume feeling, and in the case of single-sided pile knitting where the pile surface is the back and the synthetic resin layer is provided on the fabric surface, the pile surface becomes a leather with cushioning and volume feeling, and the pile surface is the surface In the case of single-sided pile knitting in which a synthetic resin layer is provided on the pile surface, the pile space is large and the elasticity is increased, and the adhesion point with the synthetic resin layer is reduced, thereby improving the soft feeling.
[0019]
Further, according to the present invention, the twisted loop portion is formed on the pile surface of the pile knitted base fabric so that the synthetic resin layer is joined to the tip of the twisted loop, so that there are few adhesion points between the base fabric and the synthetic resin layer. The space becomes larger and the soft feeling is improved, and the twisted loop portions are alternately formed for every vertical and horizontal loop, thereby further reducing the number of adhesion points between the base fabric and the synthetic resin layer, and the soft feeling is further increased. Further improvement and resilience when the hair falls down will increase elasticity and flexibility.
[0020]
Furthermore, the present invention is useful for softening and making it difficult by making the base fabric made of polyester wool fibers processed by Woolley processing, and by making the synthetic resin layer a foamed layer, softening and volume feeling are achieved. Further, weight reduction is further improved. Therefore, when twisted loop portions are formed alternately on the pile surface of the base fabric knitted on one side, and the base fabric is made of polyester wool fibers with wooly processing, and the synthetic resin layer is made of a foam layer The above-mentioned effects are further enhanced, and a high-quality leather with a feeling of volume and softness, which has elasticity and flexibility, and has a good texture can be obtained.
[0021]
In addition, when the foam layer of the synthetic resin layer makes the cells uniform, the soft feeling is better than the non-uniform foam.
[Brief description of the drawings]
1 is an enlarged cross-sectional explanatory view of the leather of the present invention. FIG. 2 is an enlarged explanatory view of a knitted structure of a base fabric.
A: Base fabric, a: Surface yarn, 1: Twist pile part, B: Synthetic resin layer,

Claims (6)

A synthetic resin leather, wherein a synthetic resin layer is provided on a pile surface of a base fabric knitted on one side . The synthetic resin leather according to claim 1 , wherein the pile surface of the base fabric is formed of a twisted loop portion . A synthetic resin leather , wherein a synthetic resin layer is provided on one side of a double-pile pile knitted base fabric, and the pile surface of the base fabric is formed by a twisted loop portion . The synthetic resin leather according to any one of claims 2 to 3, wherein every other twisted loop portion is formed alternately on the pile surface of the base fabric in the vertical and horizontal directions. The synthetic resin leather according to any one of claims 1 to 4, wherein the base fabric is made of wool fibers processed with wooly processing, and the synthetic resin layer has a foam layer. The synthetic resin leather according to any one of claims 1 to 5, wherein the base fabric is made of polyester long fibers subjected to Woolley processing.

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