JPS6245790A - Leather-like sheet - Google Patents

Abstract

PURPOSE:To provide a leather-like sheet having moderate moistness and softness, by laminating a fabric cloth to one face of a flexible synthetic fiber sheet containing cellulosic fine powder aggregate, removing at least a part of the skin layer from the other face and subjecting the skinned face to graining treatment. CONSTITUTION:A woven fabric cloth or knit fabric cloth 3 is laminated and integrated to one face 1a of a flexible synthetic resin sheet containing 5-40wt% dried cellulosic fine powder aggregate 2. At least a part of the surface skin layer S is removed from the other face 1b of the sheet 1 and the face is applied with grains 4 to obtain the objective leather-like sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a leather-like sheet that has an appearance, feel and strength similar to leather, and particularly has moisture permeability similar to leather.

(Prior art) There are various kinds of leather-like sheets made of synthetic resins. For example, synthetic resins such as polyamide-based synthetic resins and urethane-based synthetic resins are coated on base materials such as cloth and nonwoven fabrics. In order to form a resin layer and have a function similar to that of leather, there are products in which fine rack-like or pores are provided in the synthetic resin layer.

(Problem to be solved by the invention) However, the above leather-like sheet has a degree of breathability due to cracks or pores, and is said to be similar to leather, but synthetic resin has hygroscopic properties. Because of this, depending on the structure of the synthetic resin layer, moisture permeability is almost non-existent, and as a result, the surface often feels rough or sticky, which makes it uncomfortable to the touch, and it is also not supple. There were some problems, such as a lack of brightness.

(Means for Solving the Problems) This invention solves the above-mentioned problems, and in order to obtain a low-cost leather-like sheet A, the dried cellulose-based fine powder aggregate 2 is A woven or knitted fabric 3 is integrally laminated on one side 1a of the soft synthetic resin sheet 1 or film contained, and all or part of the surface skin layer S portion on the other side 1b of the sheet 1 or film is laminated. The cellulose-based fine aggregate 2 includes wood powder,
Approximately 200 mesh materials such as pulp powder, Japanese husk powder, rice husk powder, and straw powder are used, and soft synthetic resins such as vinyl chloride, ABS resin, nylon, etc. are used.

(Function) The leather-like sheet A includes a soft synthetic resin sheet 1 containing fine cellulose aggregate 2, and a woven or knitted fabric is integrally laminated on one side 1a of the synthetic resin sheet 1. However, since the surface skin layer S made of synthetic resin formed on the other surface 1b has been removed in whole or in part, the surface skin layer S formed on the other surface 1b is
The aggregate 2 or the cross section of the aggregate 2 is exposed, and since the aggregate 2 is cellulose-based and has hygroscopicity and air permeability, there is moisture permeability and air permeability between both surfaces 1a and lb of the synthetic resin sheet 1. There is no condensation on the surface of the sheet A even when it is pasted on a wall, etc., and it has a feel similar to that of leather due to its moderate humidity.

Moreover, the aggregate 2 contained in the synthetic resin sheet 1 gives stiffness to the sheet 1, making it easier to sand the surface tb, and making the grain 4 process a turning process.

Furthermore, since the aggregate 2 is cellulose-based, it has fiber fluff 5 on its surface, and the fluff 5 of the aggregate 2 exposed on the grain 4 surface gives the surface 1b of the sheet 1 a leather-like appearance and feel.

(Example) Fig. 1 shows an example of a leather-like sheet according to the present invention, where A is a leather-like sheet, 1 is a sheet of vinyl chloride, which is a soft synthetic resin, and 3 is one of the sheets. side 1
It is a fabric such as knitted fabric that is integrally laminated to a.

The synthetic resin sheet 1 is mixed with 5 to 40% dry wood flour, which is a cellulose-based fine aggregate 2 and has a moisture content of 2.8 to 5Z, and when the synthetic resin sheet 1 is roll-formed, a cloth such as stockinette is mixed. The fabric 3 is made of stockinette on the sheet 1 by fusing it to one side of the sheet 1, by heat-pressure fusing it to extrusion molded and sliced material, or by adhering it with a water-based vinyl urethane adhesive. Cloth materials 3 such as the above are laminated together. Note that there are cases where a foaming agent is mixed into the synthetic resin and foam molding is performed. Also, the other side 1 of the sheet 1
As shown in Fig. 2, b usually has a surface skin layer S formed thereon, and all or part of this is removed by sanding or the like to expose the aggregate 2 or a cross section of the aggregate 2. By thermo-compressing a grain roll or the like onto the surface, four grained surfaces are obtained.

The mixed aggregates 2 are connected by the synthetic resin and give stiffness to the synthetic resin sheet 1, making it possible to perform surface treatment by sanding and also to provide protruding grains 4.

(Effect) The leather-like sheet according to the present invention is configured as described above,
The sheet is made by laminating synthetic resin containing cellulose aggregate and woven or knitted fabric, and has leather-like strength, heat resistance and flame retardancy, and is easy to process. It is simple and therefore low cost. Moreover, the leather-like grain is formed and maintained in a perfect state without any grooves due to the mixing of aggregate into the synthetic resin.

In addition, the cellulose-based fine powder aggregate contained in the synthetic resin sheet has hygroscopicity, breathability, and heat insulation properties, and in addition to providing these properties to the resin sheet, in other words, the leather-like sheet, especially on the textured surface. Since the aggregate in the building is directly exposed to the outside, it has excellent moisture permeability. Note that if the synthetic resin is made into fine foam, air permeability will further increase.

Therefore, the leather-like seat surface has moderate moisture and soft flexibility similar to leather, but unlike leather, it does not stretch even when wet with water.
It has high tensile strength.

On the other hand, its moisture permeability prevents dew condensation on the surface or water droplets from collecting between the sheet and the substrate even when used for interior decoration, and the wrinkles formed on the surface of the sheet and the fluff of the exposed aggregate create a leather-like appearance. It has a good appearance and feels similar to leather due to the friction caused by the appropriate moisture as described above.

Furthermore, coloring can be freely achieved by mixing dyes into the synthetic resin.

From the above, it is an excellent material for car linings, seats, bags, walls, and other uses.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a sectional view of a synthetic resin sheet formed into a sheet shape, and Fig. 3 is a sectional view of an embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a grained surface portion in the figure. A...Leather-like sheet, 1...Synthetic resin sheet, 2.
... aggregate, 3... cloth, 4... grain, S... skin layer.

Claims (1)

[Claims] A cloth fabric is integrally laminated on one side of a soft synthetic resin sheet or film containing 5 to 40 o/wt of dried cellulose-based fine powder aggregate, and a surface skin layer on the other side of the sheet or film. A leather-like sheet characterized in that all or part of the portion has been removed and the surface has been subjected to a grain treatment.