JP2526044B2 - Leather-like molding material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is an improvement of a leather-like molded material which is made into a sheet or film by a synthetic resin material by finely crushing leather, and particularly has good processability and breathability. The present invention relates to the provision of a leather-like molded material having good hygroscopicity.

(Prior Art) Conventionally, a leather-like molded material in which a crushed elongated fibrous leather tissue B is formed into a sheet shape using a soft synthetic resin A, or the surface is further sanded to make it fluffy and a suede tone is formed. However, since these generally contain a fibrous leather structure, they were excellent in tensile strength and the like and had hygroscopicity and breathability similar to leather.

(Problems to be Solved by the Invention) However, in the above leather-like molding material, since the leather structure B used is an elongated fibrous material, extrusion molding,
It is difficult to use it as a filler for injection molding and the like, and there is a disadvantage that the synthetic resin material A gathers on the surface of the sheet arranged in a fibrous state and a skin layer A ′ composed of only the synthetic resin material A is formed. It was Also, if you sand to remove this, the sheet will be thin due to sanding,
The strength was reduced, and it was necessary to attach a backing cloth to compensate for this.

Also, at the time of sanding, the resin on the surface of the sheet melts due to frictional heat with the sanding paper and hardens on the surface, so when sanding,
There are various problems such that a thin and hard layer is formed on the surface of the molded sheet, and it sticks to the surface of the sanding paper to hinder the work efficiency.

(Means for Solving Problems) The present invention is a leather-like molding material that has been proposed to solve the above problems, wherein a thermoplastic synthetic resin compound is passed through a 40-mesh sieve. The dried crushed leather 2 to the extent of mixing is mixed in the range of 60 wt% or less, and the kneaded dough material is formed into a sheet-like or film-like leather-like material 3 with a calendar roll, and the leather-like material 3 is crushed. The objects 2 are fixed to each other by the mixed synthetic resin 1 at the crushed cilia 2a.

(Operation) In the present invention, the crushed leather 2 mixed with the material of the synthetic resin 1 is crushed dry leather to the extent that it passes through a 40-mesh sieve, and has cilia 2a on its surface. The material of the synthetic resin 1 is melted and solidified by the calender rolls at the cilia 2a, and the crushed materials 2 are fixed to each other, and the crushed materials 2 are not filled up with each other, leaving a gap or sheet shape or It is formed into a film.

Further, since it is formed by a calendar roll instead of extrusion molding, it is difficult to form a skin layer formed by only the synthetic resin 1 being called on the surface of a sheet or the like.

In addition, the whole surface of the cilia 2a is not solidified by the synthetic resin 1 but is partially fixed, so that it has excellent breathability and hygroscopicity, and also has elasticity, and easily fluffs when sanding. You can do it.

(Example) FIG. 1 shows an example of a leather-like molded material according to the present invention, in which 1 is a thermoplastic synthetic resin and 2 is a crushed leather. The crushed leather product 2 has a size such that dried leather is finely crushed and passes through a 40-mesh sieve, and the surface thereof is a crushed fibril portion 2a made of a fibrous leather tissue. The crushed leather 2 is mixed in the range of 60 wt% with a thermoplastic synthetic resin compound such as vinyl chloride resin, nylon resin, ABS resin, etc. and a thermoplastic synthetic resin compound of filler, pigment, plastic material, etc., After kneading with a mixer 4, as shown in FIG. 2, a calender roll 5
A sheet-like leather-like material 3 having a predetermined thickness is formed by means of which the material of the synthetic resin 1 mixed between the crushed materials 2 is melted and the adjacent crushed materials 2 are linked to the crushed woven portion 2a. They are fastened to each other by being solidified and solidified, and the surface 3a is subjected to the crimping a by thermocompression bonding of the chevron roll 8. If it is not necessary, the grain processing is not performed.

The leather-like material 3 may be sanded on the surface 3a by the sanding device 5 in order to make the surface 3a fluffy. Also, depending on the intended use of the leather-like molding material, only one side should be sanded and the other side should have a silver finish or a gloss finish. You can

When further strength is required, a fabric cloth or paper or a reinforcing sheet 7 made of cloth and paper is fused to one surface of the leather-like cloth 3 or laminated by adhering with a water-based vinyl urethane adhesive or the like. You can let me do it.

(Effects of the Invention) The leather-like molding material according to the present invention is a fusion product in which a crushed material of leather is mixed in a thermoplastic synthetic resin compound and is formed into a sheet-like or film-like leather-like material by a calender roll. The synthetic resin does not reach the surface of the leather-like material, and it is difficult to form a skin layer formed only by the synthetic resin during extrusion molding.

Therefore, there is no need for sanding unless there is a special purpose, and it has a feature that the degree of processing and the generation of scraps by that amount can be reduced.

Also, since the crushed material of dried leather is mixed in the thermoplastic synthetic resin compound within the range of 60 wt%, the crushed material of leather is fixed to each other by the synthetic resin at the crushed cilia, and Is never filled,
When sanding for a suede-like surface, etc., fluffing is good, and when the surface of the leather-like material is textured, the resin is called on the surface and solidifies to form texture. Rather, the texture is formed because it extends to the inner layer of the fabric, and the texture of the texture is strong.

Furthermore, since there are the minute gaps between the crushed materials in the leather-like material as described above, it has breathability and hygroscopicity, has appropriate elasticity, and has properties very similar to leather.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an embodiment of a leather-like molded material according to the present invention, FIG. 2 is a schematic explanatory view showing the forming process thereof, and FIG.
The figure is an enlarged cross-sectional view of a conventional example. 1 ... Synthetic resin, 2 ... Crushed material, 2a ... Crushed cilia part, 3
...... Leather-like material.

Claims (1)

(57) [Claims] 1. A thermoplastic resin compound containing 40 parts
Crush dried leather pieces that pass through a mesh sieve.
Mixed within the range of 60 wt%, the kneading dough material is formed into a sheet-like or film-like leather-like material with a calendar roll, and the crushed leather in the leather-like material is the mixed synthetic resin at the crushed cilia. A leather-like molded material characterized by being fastened to each other by.