JPH10315258A - Flooring composite material and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a flooring composite material, which is mainly made of industrial wastes and, in addition, to which elasticity can give through a more simpler process than ever by a method wherein a lower layer material consisting of rubber chips and a heat reactive resin and an upper layer material consisting of thermoplastic resin chips and specified unvulcanized rubber chips are poured in a mold so as to be integrally compression-molded under heat. SOLUTION: A lower layer material 4 made of a mixture of rubber chips and a heat reactive resin is poured in a mold 1 and, on the lower layer material, an upper layer material 3 made of thermoplastic resin chips and 0-50 wt.% of unvulcanized rubber chips is poured so as to integrally compression-mold the poured materials under heat. As a result, not only industrial wastes such as waste tires and waste plastics can be employed as major material but also a production process can be simplified, resulting in making a production cost very comparatively low. In addition, by changing the particle sizes of respective chips and the mixing ratio of the heat reactive resin and the unvulcanized rubber chips, the elasticity, heat retaining properties, anti-slip properties and flame retardancy suitable for a use object can easily be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite material for floors and a method for producing the same, and more particularly to a composite material for elastic floors and a method for producing the same, which makes effective use of waste rubber and plastic.

[0002]

2. Description of the Related Art Conventionally, as this kind of composite material for laminated floors having elasticity, one disclosed in Japanese Patent Application Laid-Open No. 227250/1990 is known. In this conventional example, first, a urethane elastomer is applied to a molding die, and then a mixture of a rubber chip and a binder is injected and integrally heated and compression molded.

[0003]

However, in this conventional example, a complicated step of first applying a urethane elastomer to a molding die is required, and in addition, the urethane elastomer has to use a virgin material, which leads to a cost reduction. There was a drawback that it was relatively expensive.

[0004] The present invention has been made to solve these drawbacks, that is, both the upper layer material and the lower layer material are made of waste plastic or waste rubber chips, that is, industrial waste, which is a social problem today, as a main material. Further, the present invention relates to an elastic composite material for a laminated floor which can be manufactured in a simpler process and a method for manufacturing the same.

[0005]

That is, a composite material for floors according to the present invention is obtained by injecting a mixture of a rubber chip as a lower layer material and a thermoreactive resin into a molding die, and then a thermoplastic resin chip as an upper layer material. A mixture of 0 to 50% by weight of an unvulcanized rubber chip is injected and integrally heat-pressed, and the thermoplastic resin as the upper layer material is made of a plurality of colors. The colored chips have a granite finish.

[0006]

[Function] By changing the thickness of the upper layer material and the lower layer material, the particle size of each chip, and the mixing ratio of the thermoreactive resin and the unvulcanized rubber chip, a floor composite material having characteristics according to the purpose of use can be easily obtained. Can be obtained. In addition, by admixing unvulcanized rubber into a thermoplastic resin which is a main material of the upper layer material, sticking to a mold at the time of demolding can be prevented.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a composite material for a floor according to the present invention;
A mixture of a rubber chip as a lower layer material (4) and a thermoreactive resin is injected into the mixture, and a mixture of a thermoplastic resin chip as an upper layer material (3) and 0 to 50% by weight of an unvulcanized rubber chip is injected thereon. It is formed by integral heat compression molding.

Hereinafter, the most preferable chip particle size and mixing ratio obtained as a result of the experiment are shown. First, as the lower layer material (4), a particle diameter of 1.0 m obtained by pulverizing a waste tire was obtained.
A mixture of 20 to 5% by weight of a rubber chip having a size of m or more and 10.0 mm or less and a thermoreactive resin (in the experiment, using Bandex TP1221 manufactured by Dainippon Ink Co., Ltd.) is injected into a molding die (1). Particle size obtained by pulverizing used agricultural vinyl chloride as upper layer material (3) 1.0 or more 1
0,0mm or less thermoplastic resin chip and 0-50% by weight
The mixture of unvulcanized rubber chips was injected and heated and compressed at 150 to 180 ° C. for 5 to 10 minutes in a heating and compression molding machine (2), and after waiting for natural heat release, the upper layer material and the lower layer material were integrated. An elastic laminate composite was obtained.

Further, if a plurality of colored thermoplastic resin chips or colored unvulcanized rubber chips are used as the upper layer material, a floor composite material having a granite-like finished surface can be obtained. In the present embodiment, the step of first injecting the lower layer material into the mold and then injecting the upper layer material is performed. However, even if this step is reversed, it can be performed separately.

[0010]

As described above, according to the floor composite material and the method of manufacturing the same according to the present invention, not only can industrial waste, which is a major social problem, such as waste tire waste plastic, be used as a main material, but also it can be produced. Since the process can be simplified, the manufacturing cost is very low.In addition, by changing the thickness of the upper layer material and the lower layer material, the particle size of each chip, the mixing ratio of the heat-reactive resin and the unvulcanized rubber chip,
It is possible to easily obtain a floor composite material having appropriate characteristics according to the purpose of use, that is, elasticity, heat retention, slip resistance, and flame retardancy. Furthermore, if a plurality of colors of thermoplastic resin chips or unvulcanized rubber chips are used for the upper layer material, a composite material for floors having a granite-like appearance can be obtained, further increasing the commercial value.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a manufacturing process of a floor composite material according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molding die 2 Heat compression molding machine 3 Upper layer material 4 Lower layer material

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B29L 9:00 31:10 (72) Inventor Satoru Hara 3644-1, Fudoshima, Mishima-cho, Tosu City, Saga Prefecture 1 (72) Inventor Shigeru Himeno Itiko 263-1, Yomada, Yame City, Fukuoka Prefecture

Claims (2)

[Claims] 1. A mixture of a rubber chip as a lower layer material and a thermoreactive resin is injected into a molding die, and then a mixture of a thermoplastic resin chip as an upper layer material and 0 to 50% by weight of an unvulcanized rubber chip is injected. A floor composite material integrally formed by heat compression molding and a method for producing the same. 2. The composite material for floors according to claim 1, wherein the thermoplastic resin or unvulcanized rubber as the upper layer material is a colored chip of a plurality of colors.