JP2740963B2 - Vulcanized rubber composition having a pattern to which colored short fibers are added - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flooring made of vulcanized rubber having spots or spots. More specifically, the present invention relates to a flooring made of a vulcanized rubber having a surface formed by kneading dark colored short fibers into a light-colored rubber compound and having spots or spots resembling natural stone.

The vulcanized rubber composition having spots or spots of the present invention can be used for public facilities such as government buildings, stations, museums, hospitals, commercial facilities such as stores and showrooms, and for indoor and outdoor sports facilities such as golf courses and resort hotels. Used as flooring material.

The flooring material of the present invention made of vulcanized rubber having a spot or a spot pattern is also useful as a bottom material in the field of the shoe industry.

BACKGROUND OF THE INVENTION Rubber has been used in a wide variety of fields as flooring and shoe flooring indoors and outdoors due to its unique properties: elasticity, abrasion resistance and unique walking sensation.

The shape of the surface of such products may be smooth, but the uneven design is engraved on the vulcanization mold that is molded for anti-slip and decoration, and the product is vulcanized. Some are attached.

The color of the product is used after being colored in a color suitable for the surrounding environment used and the product used in combination.

This coloring method is practical for coloring compounds such as titanium oxide, red iron oxide, and organic pigment carbon black in compounds consisting of polymer rubber, reinforcing agents, fillers, softeners, vulcanizing agents, vulcanization accelerators, antioxidants, etc. It is to be colored.

However, the color of a single hue is not brilliant in terms of decoration and cannot meet the demands of a highly aesthetic market.

Natural stones have beautiful colors and patterns, such as clouds and spots, and are increasingly used as decorative materials.

There are similar products for rubber products. Vulcanization of a color tone that can be balanced with the base rubber compound prepared in advance in a base rubber compound composed of a polymer rubber, a reinforcing agent, a filler, a softener, a vulcanizing agent, a vulcanization accelerator, an antioxidant, a coloring agent, etc. There is a vulcanized rubber having a spot or a streak pattern formed by mixing rubber particles.In a product manufactured by such a method, when the vulcanized rubber particles are added to and mixed with the base rubber compound, the vulcanized rubber particles have a base rubber compound. The shear causes the vulcanized rubber particles to collapse during kneading. Therefore, it is difficult to produce a product having a certain color tone. This tendency is particularly strong when kneading dark vulcanized rubber particles into a light-colored base rubber compound. In the case of vulcanized rubber particles, the light color is actually applied to the medium-dark base rubber compound. Is limited to the case where vulcanized rubber particles are mixed, and it is difficult to obtain a clear spot or a streak pattern.

(Means for Solving the Problems) In the present invention, the above-mentioned problems can be solved by adding colored short fibers to a flooring made of at least one kind of natural rubber, synthetic rubber or a mixture thereof. By kneading the dark colored short fibers to the light-colored rubber composition, it has a clear spot pattern, and in the case of short fibers, at the time of kneading the rubber composition, it is not disintegrated by its share.
Therefore, it is possible to obtain a product in which the length of the kneading time does not affect the color tone fluctuation at all.

The present invention provides a rubber composition comprising a solid gum component and a rubber additive selected from the group consisting of natural rubber, synthetic rubber or a mixture thereof, having a thickness of 1 to 30 denier and a length of 0.1.
The present invention relates to a rubber flooring material having spots or spots formed by colored short fibers, characterized by adding colored short fibers of about 3.0 mm and then vulcanizing the rubber composition.

Rubber that is a component of the composition of the present invention is natural rubber, styrene butadiene rubber, butadiene rubber, nitrile rubber, ethylene propyne rubber, chlorosulfonated polyethylene,
Examples include urethane rubber.

Examples of the colored short fibers that are components of the composition of the present invention include cotton, human silk, vinylon, nylon, polyester-based, and acrylic-based fibers.

The thickness of the colored fiber is 1 to 30 denier, preferably 3
~ 20 denier, length 0.1 ~ 3.0mm, preferably 0.3 ~ 1.0
mm, the color fastness of the colored fiber is a dark-colored material that is colored with a dye having heat resistance to withstand a vulcanization temperature of 160 ° C. for 20 minutes and light fastness of a gray scale of 3 or more. After coloring, it is preferable to use a material which has been treated for antistatic. Further, it is preferable to use a fiber which has been subjected to a treatment for improving the adhesion to rubber.

The compounding ratio of each component of the composition of the present invention is preferably 1 to 25 parts by weight, preferably 3 to 20 parts by weight of colored short fibers per 100 parts by weight of natural rubber, synthetic rubber, and a mixture thereof.

The above-mentioned composition of the present invention is compounded with various additives for rubber, such as a reinforcing agent, a filler, a softening agent, a vulcanizing agent, a vulcanization accelerator, an antioxidant, a vulcanization aid, and a coloring agent, if necessary. .

In the present invention, the fiber diameter is limited to the above-mentioned range. When the fiber diameter is less than the lower limit of the range, spots or dashed lines are small, which is not suitable as a pattern. Because it becomes.

The reason why the fiber length is limited to the above-mentioned range is that it is difficult to cut the fiber below the lower limit of the range, and the dispersion of the fiber becomes worse in the kneading step above the upper limit.

If the blending ratio of the fibers is lower than the lower limit of the above range, the number of spots is small and an intended pattern is not formed. Further, a spot pattern is sufficiently formed within the above upper limit range, and further inputting has no merit in terms of design and cost.

It is preferable not to add a coloring agent to the rubber composition, and it is preferable to keep the coloring agent in a small amount even if added, in order to obtain a clear spot.

Colored short fibers can be used in combination of small and large particles, or two types of fibers of different colors can be used in combination to obtain an interesting spot or spot pattern.

Hereinafter, the present invention will be described more specifically with reference to examples of the present invention.

 The parts are those on a weight basis.

(Example) Floor materials having spots or spots were produced using the composition of the present invention according to the compounds and the compounding ratios shown in Table-I.

Table I Formulation Formulation ratio (parts) SBR 1502 80 Nipol 2057SS 20 Zinc flower 5 Sulfur 2.7 Vulcanization accelerator DM 3 Acting SL (Yoshitomi Pharmaceutical) 1 Stearic acid 1 Process oil 5 Hard clay 80 Nipsil VN3 (Nippon silica) 20 Oxidation Titanium 2 Nylon fiber black 15 denier 0.5 mm length 15 Total 234.7 Of the flooring materials shown in Table I, materials other than sulfur and vulcanization accelerator were masticated for 1 minute while passing cooling water with a Banbury mixer.
After kneading for 4 minutes, the mixture is dropped on a roll and cooled and cut by a batch of machine. Next, this is put into a kneader, sulfur and a vulcanization accelerator are added, and the mixture is kneaded for 5 minutes, passed through a roll, and formed into a cooling ribbon by a batch of machine. Rolled rubber is rolled into a 1000mm × 1000mm ×
It was rolled and cut to a size of 4.0 mm. The unvulcanized sheet is press vulcanized at a vapor pressure of 6 kg / cm ² for 8 minutes using a flooring preparation mold, and has a mold design on its surface, with light black spots or spots. A vulcanized rubber resembling a stone was obtained. After vulcanization was completed, the back surface was buffed to obtain a floor material.

(Effects) (1) A vulcanized rubber resembling natural stone having clear dark spots or spots on a light-colored base rubber can be obtained.

(2) Since the color tones of the base rubber and the fibers can be appropriately selected and combined, any color can be formed.

(3) The product is characterized in that a product having a constant color tone is always obtained without any color fluctuation due to processing conditions which occurs when a conventional vulcanized rubber particle is mixed and produced.

Claims (1)

(57) [Claims] 1. A rubber composition containing a solid rubber component and a rubber additive selected from the group consisting of natural rubber, synthetic rubber or a mixture thereof, having a thickness of 1 to 30 denier and a length of 0.1 to 0.1.
A rubber flooring material having spots or dashed lines formed by colored short fibers, wherein colored short fibers of up to 3.0 mm are added, and then the rubber composition is vulcanized.