JPH066487U - Synthetic resin leather - Google Patents

Abstract

(57) [Summary] [Purpose] To make the tensile strength and elongation of synthetic resin leather in the vertical and horizontal directions uniform, and to extend the life of leather products and improve workability such as cutting. [Structure] Horizontal threads (a-1, a-2, a-3, ...
・ ・) Threads in the horizontal direction (b-2, b) that are adjacent in the vertical direction
−3, ...) to form a first loop (A), and the yarns (b-1, b-2, b-3, ...
..) are threads (a-1, a) in the horizontal direction that are adjacent in the vertical direction.
-2, a-3, ...) to form a second loop (B-1) on each side, and a thread (b-2,
b-3, ...) and the third loop (B-2)
A synthetic resin layer is bonded to one surface of a base cloth made of knitted knitted fabric.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synthetic resin leather, and more particularly to a leather which has a uniform elongation rate and a tensile strength in the history and is suitable for use as a leather for automobiles.

[0002]

[Prior art]

 Conventionally, this type of synthetic resin leather for automobiles is made of elastic leather, and the base fabric is either one-sided or two-sided knitted fabric. However, in these knits, the elongation in the horizontal direction is extremely larger than that in the vertical direction, and the tensile strength in the horizontal direction is weaker than that in the vertical direction. Therefore, the leather itself using these knitted fabrics also has a significantly larger elongation in the transverse direction than the elongation in the longitudinal direction, and the tensile strength in the transverse direction is weaker than that in the longitudinal direction.

[0003]

[Problems to be solved by the device]

 Due to these characteristics, when automobile seats, other chairs, bags, etc. are manufactured with leather using one-sided knitting or double-sided knitting, the strength of the finished product in one direction is smaller than the strength in the other direction. The product life will be shortened due to factors such as breakage and deformation of the product due to distortion. Further, especially when a heavy load such as a person's weight is frequently applied such as a synthetic resin leather for automobiles, the life of the seat is likely to be shortened due to the above factors.

Further, in the case of a leather using a single-sided knitted fabric or a double-sided knitted fabric, since it has a vertical and horizontal direction, it is easy to be restricted in the cutting direction at the time of sewing, a large amount of cutting waste is generated, and the workability of cutting is reduced. Moreover, there is a dislike that wrinkles are easily formed in the sewn portion.

The object of the present invention is to solve the above-mentioned problems of the prior art and to use a special knitted fabric as the base fabric to make the elongation and tensile strength of the synthetic resin leather in the vertical and horizontal directions uniform and It is intended to improve the workability such as cutting while extending the life.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the synthetic resin leather of the present invention, the threads in the horizontal direction (a-1, a-2, a-3, ...) Are adjacent to the threads in the horizontal direction (b). -2, b-3, ...) to form a first loop (A), and the yarns (b-1, b-2, b-3, ...) in the horizontal direction are vertical. The yarns (a-1, a-2, a-3, ...) Adjacent to the horizontal direction are hung to form the second loops (B-1), and the yarns (b-1) in the horizontal direction are formed. -2, b-3, ...) and the third loop (B-2) is formed to form a synthetic cloth layer on one side of the base cloth made of the knitted knitted fabric. It is a feature.

[0007]

[Action]

 The above-mentioned knitted knitted fabric with a special stitch structure used for leather has the characteristics that the elongation in the vertical and horizontal directions is uniform and the tensile strength in the vertical and horizontal directions is uniform. For this reason, the synthetic resin leather using this base cloth has uniform elongation and tensile strength in the vertical and horizontal directions, which improves the life of the leather product and improves workability such as cutting.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the synthetic resin laser of the present invention, and FIG. 2 is a plan view showing an example of the resin used in the synthetic resin leather of the present invention, in which 1 is a base cloth. Of the knitted fabric, 2 is a subbing layer, 3 is a synthetic resin layer, and 4 is a skin.

In the knitted fabric 1, as shown in FIG. 2, the yarns in the horizontal direction (a-1, a-2, a-3, ...) Are adjacent to the yarn in the horizontal direction (b-2, b). -3, ...) and each form a first loop (A).

The yarns in the horizontal direction (b-1, b-2, b-3, ...) Are adjacent in the vertical direction. The yarns in the horizontal direction (a-1, a-2, a-3 ,. ) To form a second loop (B-1), which is further hung on the threads (b-2, b-3, ...) in the weft direction. Form a third loop (B-2).

The knitted fabric 1 can be adjusted in advance in the longitudinal direction as well as the longitudinal tensile strength of the knitted fabric itself by a heat-setting process. Depending on these heat setting conditions, the tensile strength in the vertical and horizontal directions of the final leather product as well as the elongation in the vertical and horizontal directions affect. Therefore, the conditions such as heat setting applied to the knitted fabric 1 in advance can be arbitrarily selected according to the manufacturing conditions of the leather manufacturing process.

For example, in the manufacturing process of the leather manufacturing process, tension is applied to the knitted fabric 1 and the synthetic resin layer 3 in the traveling direction (vertical direction of the knitted fabric 1) in the laminating process, the printing process, the embossing process, and the like. Therefore, it is possible to set the heat setting condition for the knitted fabric 1 in advance in consideration of the tension condition.

As a condition for such heat setting, for example, a set rate of 75 to 85% is suitable. When manufacturing leather using this knitted fabric 1, it is necessary to maintain conditions such that the tension in the vertical direction is 15 to 25% in the laminating process, printing process, embossing process, etc. desirable.

As the material of the knitted fabric 1, a conventionally used single-sided knitted fabric or double-sided knitted material such as rayon or polyester can be used without any particular limitation.

The synthetic resin layer 3 is preferably a foam layer such as vinyl chloride, but is not necessarily limited to the foam layer and may be a layer such as a synthetic resin such as vinyl chloride or a thermoplastic elastomer. . Further, when the synthetic resin layer 3 is a foamed layer such as vinyl chloride, the skin 4 is provided as shown in the drawing, but the skin 4 is not necessarily provided.

When a synthetic resin leather is produced by using the knitted fabric 1, a knitted fabric 1 coated with an undercoating agent such as a melted film or sheet by a calendar, a T-die, etc., a vinyl chloride vinyl acetate-based or urethane-based emulsion, etc. It is obtained by laminating on. Further, a film or sheet formed in advance may be attached to the knitted fabric 1 on which the undercoat layer 2 is formed by applying the undercoat agent, using a laminator.

Example 1 In Table 1, a knitted fabric having the same stitch structure as that shown in FIG. 2 was used as the knitted fabric (base fabric) in the present invention, and a rayon / polyester blended yarn No. 20 was used as the material. The properties of this knitted fabric after heat setting are shown in the column of base fabric in Table 1. From Table 1, the knitted fabric 1 according to the present invention has a relatively uniform tensile strength in the vertical and horizontal directions, and the elongation in the vertical direction can be adjusted by the operation of the heat set. It shows that.

Further, using this knitted fabric 1, an undercoating agent (vinyl chloride vinyl chloride-emulsion) was applied to the knitted fabric 1, and the coated surface was made of a polyvinyl chloride resin of 0.1. A non-foamed leather having a synthetic resin layer of 40 mm was produced, and its characteristics are shown in the leather column of Table 2. From the numerical values of each characteristic in this column, it can be seen that the leather of the present invention has a substantially uniform tensile strength in the vertical and horizontal directions as well as elongation in the vertical direction.

Comparative Example 1 The characteristics of the single-sided knitted fabric are shown in Table 1 in the same manner as in Example 1 except that one-sided knitted fabric was used as the knitted fabric and rayon No. 20 was used as the material. Table 2 shows the respective properties of the leather produced by using the leather.

Comparative Example 2 Further, each characteristic of the double-sided knitted fabric is shown in Table 1 in the same manner as in Example 1 except that the double-sided knitted fabric was used as the knitted fabric and the rayon No. 30 was used as the material thereof. Table 2 shows the characteristics of the leather manufactured by using the ground.

From Tables 1 and 2, the single-sided knitted fabric and the double-sided knitted fabric have a weaker tensile strength in the horizontal direction than the tensile strength in the vertical direction in both the characteristics of the knitted fabric and the characteristics of the leather. The elongation in the direction tends to be extremely larger than that in the vertical direction.

[0022]

[Table 1]

[0023]

[Table 2]

[0024]

[Effect of device]

 As described above, according to the present invention, the tensile strength in the vertical and horizontal directions of the knitted fabric as well as the elongation in the vertical and horizontal directions are made substantially uniform, and the synthetic resin leather using this knitted fabric also has the vertical and horizontal tensile strengths. Is almost evened out. Therefore, the life of the leather product is extended and workability such as cutting is improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a synthetic resin leather of the present invention.

FIG. 2 is an explanatory view showing a knitted fabric according to the present invention.

[Explanation of symbols]

 1 Base cloth (knitted fabric) 2 Undercoat layer 3 Synthetic resin layer 4 Skin

Claims (1)

[Scope of utility model registration request] 1. Threads in the horizontal direction (a-1, a-2, a-
3, ...) are adjacent to each other in the vertical direction in the horizontal direction (b-
, B-3, ...) to form a first loop (A), and the threads (b-1, b-2, b) in the horizontal direction are formed.
-3, ...) are the yarns (a) in the horizontal direction that are adjacent in the vertical direction.
-1, a-2, a-3, ...)
From the knitted knitted knitted fabric in which the third loop (B-2) is formed by being hung on the threads (b-2, b-3, ...) in the horizontal direction while the second loop (B-1) is formed. Synthetic resin leather, in which a synthetic resin layer is bonded to one side of the base fabric.