JPS6269887A - Synthetic leather - Google Patents

Abstract

PURPOSE:To obtain synthetic leather having appearance and touch approximate to those of artificial leather, by sanding the surface of a sheet consisting of a non-rigid synthetic resin containing a leather texture which is finely ground into a fibrous state so that the sheet surface is made into a napped state. CONSTITUTION:The synthetic resin (e.g., vinyl chloride, resin, etc.,) 2 containing the fine, fibrous leather texture 1 obtained by grinding finely leather is extrusion molded and sliced into given thickness to give the sheet 3. The surface 3a of the sheet is sanded and the fibrous leather texture is made into a napped state, to give synthetic leather having appearance and touch approximate to natural leather having wetting, good feeling. The cloth 4 is thermally bonded to the sheet 3 under pressure to increase tensile strength and tear strength.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention particularly relates to synthetic leather that has an appearance and feel similar to leather.

(Prior art) Many types of conventional synthetic leather are made by laminating synthetic resin on a cloth base, etc., and in order to provide breathability and have properties similar to leather, they are made into fine, rack-like, or There were some in which pores were provided in the synthetic resin layer.

(Problem to be solved by the invention) However, the above material has poor hygroscopicity, has a rough surface, and lacks the moist feel of leather due to moderate hygroscopicity. Especially in suede-like products, synthetic fibers are not suitable. Many of them were electrodeposited and had a leather-like appearance, with almost no hygroscopicity.

(Means for Solving the Problems) The present invention is a synthetic leather provided in view of the above situation, which contains a leather tissue 1 that is finely crushed into fine fibers in order to more closely resemble leather. A sheet 3 is formed of a soft synthetic resin 2, and the surface 3a of the sheet 3 is sanded to expose the ram-shaped leather structure 1 in a fluffy manner.

(Function) The synthetic leather according to the present invention contains a soft synthetic resin 2 containing leather tissue 1 that has been finely crushed into fine fibers, and such leather tissue 1 is connected by a synthetic resin 2. Therefore, it is strong, and due to the properties of the leather structure 1, it has breathability, moisture absorption, etc. close to that of leather. Also, F
The lim-shaped leather tissue 1 is sanded to the surface 3a.
It is exposed in a fluffy manner and has a similar appearance and feel to the lining.

(Example) Figure 1 shows an example of the synthetic leather according to the present invention.
2 is a fine fibrous leather tissue obtained by finely crushing leather; 2 is a soft synthetic resin containing the leather tissue 1, and is used as the sheet 3; 0 synthetic resin 2; For example, vinyl chloride, nylon, ABS resin, etc. are used.

The sheet 3 is made by extrusion molding a synthetic resin 2 containing fine fibrous leather tissue 1, slicing it to a predetermined thickness, and sanding the surface 3a of the sheet 3 to expose the fibrous leather tissue 1 as fluff on the surface 3a. The surface 3a has a lining-like surface. In this case, in order to effectively fluff it, it may be sanded with a coarse sanding disc.

Also, depending on the purpose of use of the synthetic leather, sanding may be done only on one side, and the other side may be finished with a finishing agent such as dye, paint, oil, etc. to give it a silvery surface or a glossy surface. Sometimes it is skin-like.

Furthermore, in the case shown in FIG. 2, a cloth material 4 such as stockinette is fused to one side of the sheet 3 during roll forming of the sheet 3, or heat and pressure fused to the sheet 3 which has been extruded and sliced. This is an example in which they are laminated together by bonding with a water-based vinyl urethane adhesive or the like.
The fabric 4 has further increased tensile strength, tear strength, etc.

FIG. 3 shows a synthetic resin 2 further containing a cellulose-based fine aggregate 5 such as wood flour or pulp powder, and the surface 3a is sanded to have a fluffy surface with a fibrous leather tissue l exposed. This is an example in which the grain 6 is formed by heat-compression bonding a grain roll or the like on this surface, and by incorporating the cellulose-based fine powder aggregate 5, the shape material properties of the grain 6 are improved, and the air permeability and moisture absorption of the aggregate 5 are improved. This is done so that the breathability and hygroscopicity of the synthetic leather are not impaired due to its properties.

(Effect) The synthetic leather according to the present invention is finely crushed as described above, and a sheet is formed from the soft synthetic resin containing the fine fibrous leather tissue, and the surface of the sheet is sanded, and the Because the leather tissue is exposed in the form of fluff, the surface becomes suede-like.Furthermore, since the fluff is crushed leather tissue, it is also hygroscopic, and with the right amount of moisture, the surface becomes moist and slimy. It has almost the same feel.

In addition, since the fibrous leather structure is connected by the synthetic resin and solidified in an intertwined state, it has excellent tensile strength and tear strength.

In addition, the leather structure provides breathability and moisture absorption properties similar to those of leather.

Furthermore, even when one surface is finished by painting or the like, the finished surface is difficult to peel off due to the fuzz.

Furthermore, since the leather tissue used as the raw material is used by crushing skin scraps and is used as a so-called waste product, the cost is relatively low.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a typical embodiment of the invention, and FIGS. 2 and 3 are sectional views of other embodiments. 1... Fibrous leather tissue, 2... Synthetic resin, 3...
sheet.

Claims (1)

[Claims] Synthesis characterized in that a sheet is formed of a soft synthetic resin containing finely crushed leather tissue in the form of fine fibers, and the surface of the sheet is sanded to expose the fibrous leather tissue in the form of fluff. leather.