JPS6344877A - Leathery sheet - Google Patents

Abstract

PURPOSE:To provide a homogeneous leathery sheet and prevent loss of flexibility on the surface thereof, by kneading dried hide powder with a thermoplastic resin compound, hot-molding the resultant kneaded blend and forming a decorative film from a pigment and binder on the surface of the formed sheet. CONSTITUTION:Dried hide powder 2 having 50-250 mesh particle size is kneaded with a thermoplastic resin compound prepared by blending plasticizer, stabilizer, filler, additive, etc., in a thermoplastic resin 3, e.g. vinyl chloride, etc., at 30-70:70-30 weight ratio (%) of the dried hide powder to the thermoplastic resin compound and hot-molding the resultant blend to form a sheet 1. A decorative film 4 consisting of a binder, e.g. casein, etc., and a pigment or dye is formed on the surface of the sheet 1. As a result, the sheet provides a homogenous leathery sheet 1 and the decorative film 4 will neither peel nor lose flexiblity.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a leather-like sheet constructed so that the decorative film on the surface does not peel off.

(Prior Art) Conventionally, there has been a method of applying a surface coating to the leather surface 1 to impart fascination such as gloss and color, aesthetic appearance, water resistance, and abrasion resistance to the leather surface.

(Problem to be Solved by the Invention) However, the surface (2) of leather A has an epidermal part, and as shown in Figure 3, there are sebum lines, pores, etc., so that complex deep and shallow uneven parts B are formed. Therefore, in order to form a uniform surface film, it was necessary to apply a base coat, top coat, makeup coat, etc. to form a thick film.

Also, during this time, it is necessary to perform drying, ironing, pressing, etc., which requires a considerable amount of time and effort, which increases the cost, and also causes the leather to lose its characteristics, such as enamel finishes, and furthermore, the leather expands and contracts due to dryness, humidity, temperature, and temperature. This causes various problems such as wrinkles and cracks in the surface film, or peeling of the surface film and the leather.

(Means for Solving the Problems) The present invention was provided to eliminate the above problems, and the dry leather powder 2 of 50 to 250 mesh is
0 to 70%, thermoplastic resin compound (compo
This is a leather-like sheet in which a decorative film 4 is provided on the surface 1a of the sheet 1 by kneading and heat-forming und) at a weight ratio of 70 to 30% with a pigment or dye and a binder.

(Function) The leather-like sheet configured as described above has lubricity because the dried leather powder 2 is fine particles consisting of 50 to 250 meshes of protein and lipid, and blends well with the thermoplastic resin 3, making it easy to treat. The sheet 1 is heated and molded to become a homogeneous leather-like sheet 1, and its surface is smooth, so the decorative film can be thin. Even if the sheet becomes wet due to humidity or the like, the decorative film 4 does not peel off.

(Example) Fig. 1 shows a leather-like sheet according to the present invention, 2 is leather powder, 3 is a thermoplastic resin, and the leather powder 2 is obtained by crushing leather, leather scraps, etc. in an extremely dry state. Fine particles of 250 to 250 mesh, or leather powder with a moisture content of 3% or less generated by sanding leather;
A thermoplastic resin compound in which plasticizers, stabilizers, fillers, additives, etc. are mixed into the thermoplastic resin 3 such as vinyl chloride is kneaded at a weight ratio of 70 to 30%, and then calender roll, extrusion, injection. A sheet 1 is formed by a molding machine or the like, and a cosmetic film 4 made of a binder such as casein or synthetic resin and a pigment or dye is formed on the surface of the sheet 1. Other polishing agents such as wax may be mixed into the decorative film 4. In this embodiment, a resin skin layer 3a made of the thermoplastic resin 3 is formed on the surface of the sheet 1 when it is molded, and a decorative film 4 is formed thereon by painting.

FIG. 2 shows a resin skin layer 3a on one side of the sheet 1.
Wash paper, cloth, or both are press-fused or bonded as reinforcing fabric 5 to make the sheet 1 strong against tension, etc., and after sanding the other side to remove the resin skin layer 3a, makeup is applied. A film 4 is formed on that surface.

In addition to leather powder 2 and thermoplastic resin 3, sheet 1 is further mixed with natural fibers such as hemp, cotton, wool, etc. or synthetic fibers such as polyester, nylon, vinylon, etc., and molded.
In order to impart strength to the sheet 1, the surface of the sheet 1 may be provided with leather grains using grain rolls.

Further, after the sheet 1 is impregnated with a colored liquid containing a dye or pigment, the cosmetic film 4 may be transparent or lightly colored.

(Effects) The leather-like sheet according to the present invention is kneaded and heat-formed with a weight ratio of 30 to 70% dry leather powder of 50 to 250 mesh and 70 to 30% of thermoplastic resin powder. The leather powder is formed homogeneously due to its slipperiness, and the surface is smooth, so the decorative film formed on the surface can be finished evenly and evenly even if it is a thin layer, so the amount of material required for the film is small. The surface does not lose its flexibility due to the cosmetic film.

In addition, since the sheet is composed of leather powder bound by resin, there is no expansion or contraction due to drying or wetting, and even if the decorative film on the surface is thin, cracks and wrinkles will not occur due to peeling from the sheet. There is no such thing.

In addition, since the binder that makes up the decorative film and the resin that makes up the sheet bond together, it will not peel off due to water or moisture, and it will not peel off even if the leather-like sheet is rubbed. .

Furthermore, the sheet can be made of leather scraps, and the formation of the decorative film requires very little painting effort, resulting in low cost.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view showing one embodiment of the present invention, FIG. 2 is an enlarged sectional view of another embodiment, and FIG. 3 is a sectional view of the vicinity of the leather surface. 1... Sheet, 2... Leather powder, 3... Resin, 4...
... Cosmetic film, 5... Reinforcement fabric. Figure 3 p

Claims (1)

[Claims] 30-70% dry leather powder of 50-250 mesh
A leather-like sheet, characterized in that a thermoplastic resin compound is kneaded at a weight ratio of 70 to 30% and then thermoformed, and a decorative film is provided on the surface of the sheet using a pigment or dye and a binder.