JP2620833B2 - Rubber crushed granular material structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure used as a pavement material or a flooring material in which a granular material is solidified with a resin binder, and more particularly, a granular material obtained by pulverizing rubber is solidified with a resin binder. And a pulverized granular material structure.

[0002]

BACKGROUND ART Rubber, encased in foamed rubber, natural stone, urethane resins various resins waste such as, epoxy resins, sponge, cork chips, wood chips, thermosetting and moisture-curable resin such as urethane resin or epoxy resin ceramic grain or the like Paving materials and flooring materials have been widely implemented. Such a pavement material or a floor material is formed by forming a mixture of an aggregate and a resin into a block or a sheet by a hot press and laying it on the site. In particular, rubber blocks obtained by heating and molding waste tire rubber chips with a one-component moisture-curable urethane resin and then hardening are required for places where elasticity is required, such as golf course footpaths, and for safety in parks and schools. It is widely used in places where it is used.

[0003]

As such a structure, it is most preferable to use a rubber chip obtained by pulverizing a waste tire as a granular material, and form a block or sheet by hot press molding together with a binder such as urethane resin. Widely used. However, since a large amount of additives are kneaded into the waste tire rubber chips for the purpose of preventing aging, etc., the adhesiveness with the binder is poor, and these additives exude even after molding, causing discoloration and contamination. turn into. Furthermore, the raw material of waste tire rubber chips is for trucks,
Since it is a mixture of various types of tires for passenger cars and the like, there is a variation in quality, and particularly when a certain strength is required such as a pavement block, the required strength is not sufficient. Also, various colors are required for paving materials and flooring materials, but since waste tire rubber chips are black, a large amount of pigment is required for coloring. Further, a factor that requires a large amount of pigment is to prevent discoloration due to exudation of additives and the like kneaded into waste tire rubber chips.

[0004] As a result of various investigations into granular materials in place of waste tire rubber chips having such a defect, attention has been focused on golf balls that are currently landfilled. When the golf ball is analyzed and examined in detail, the golf ball is BR,
Rubber material such as NBR, EPDM, SBR, NR, etc., contains αβ unsaturated fatty acid metal salt, organic peroxide and fillers such as zinc white and calcium carbide as main components. It was found that relatively uniform quality was obtained because there was little difference in components depending on the type of ball. In addition, the color of the golf ball is often white, it is easy to be colored thereafter, and when it is colored in another color, the amount of the pigment used is small and the adhesion to the resin binder such as urethane resin is good. Was.

The present invention has been made in view of this point.
Therefore, the purpose is conventionally disposed of by landfill
The landfill is not only expensive, but also
And abandoned golf balls that were considered to hinder the global environment
Effectively utilized, the quality is uniform, is to provide a rubber milled granulate structure excellent in wear resistance.

[0006]

That is, the pulverized rubber structure of the present invention comprises BR, NBR, EPDM, SB
The rubber of a waste golf ball containing at least one of R and NR, an αβ unsaturated fatty acid metal salt, an organic peroxide and a filler as a main component has a particle size of 0.05 to 30.00 mm when the rubber is pulverized . or a granulate, a resin binder sufficient to bind the granules
It is characterized by being al configuration.

In this case, as the resin binder , urea
Tan resin, acrylic resin, epoxy resin or vinyl acetate
And the like.

[0008]

[Function] Since the waste golf ball is a metal salt crosslinked rubber,
Adhesion with the resin binder is improved, and the structure can have a strong strength. Further, granules conventional Haita
Since it is somewhat harder than the rubber tip of the ear, it can be easily charged into the mold immediately after mixing with the resin binder, and the finished structure can have improved abrasion resistance, high resilience and elasticity Certain rubber pulverized particulate structures can be obtained.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the case where the ground rubber particle structure is used as a pavement block is taken as an example.

The pavement block 1 is composed of BR, NBR, E
PDM, SBR, at least one and αβ unsaturated fatty acid metal salt and an organic peroxide as a rubber particle size of 0.05~30.00mm waste rubber <br/> Rufubo Le mainly fillers NR The granulated material 2 and a resin binder 3 such as a urethane resin, an acrylic resin, an epoxy resin, or a vinyl acetate resin are mixed so as to form a ventilation hole 4 appropriately and have air permeability and water permeability. It is molded into a block by press molding or the like. The plurality laying filling Rukoto such paving blocks 1 on foundation 5 of the construction site, it is possible to configure the example <br/> paved road or the like.

As described above , the rubber particles of the waste golf ball
Since the substance 2 is a metal salt crosslinked rubber, the resin binder 3
It has good adhesion to the rubber and can have high strength, and is slightly harder than the tire rubber, so it has less stickiness immediately after being mixed with the resin binder 3 and can be easily charged into the mold of the heating press. Could be done. Also,
By adjusting the mixing ratio of the resin binder 3, the air holes 4 can be formed, whereby appropriate water permeability, water absorption and water retention can be provided, which is also suitable as an outdoor pavement block. . Thus, according to the present invention,
If this is the case, the effective reuse of waste golf balls becomes possible.

Next, as an experimental example, a chip 2 of a golf ball obtained by grinding the granular material 2 to 1 to 3 mm with a test grinder is marketed by Sumitomo Rubber Industries, Ltd. under the trade name "GO-R13" as a comparative example. EPDM
A rubber chip was prepared by also pulverizing to 1 to 3 mm, and the resin binder 3 was made of an MDI-based one-pack moisture-curable urethane resin commercially available from Sumitomo Rubber Industries, Ltd. under the trade name “Grip Coat C-928”. These two types of granular materials 2 were respectively bonded to prepare two samples of a specific example and a comparative example. In addition, golf ball,
The specific gravities of the EPDM rubber chip and the urethane resin are 1.0, 1.3, and 1.0, respectively. Each sample was heated at a heating temperature of 150 ° C. for 15 minutes so as to be 10 mm thick, with a filling factor of 80% and a porosity of 20%. Then, these specific examples and comparative examples were tested for tensile strength, wear, rebound, impact acceleration, walking feeling, and the like.

The tensile strength test was performed based on JIS K6301, and the abrasion test was performed using Taber abrasion test based on JIS A1453. In this Taber abrasion test, a wear wheel of H22 was used, and 1000 g
f, wear depth after 60 r / min, 1000 rounds was measured. This is because the weight change cannot be measured due to the porosity. Rebound test is steel ball (SB)
The rebound height (cm) when the golf ball (GB) was dropped from a height of 1 m was measured. In the impact acceleration test, the impact (Gmax) at the time of falling was measured based on the JIS standard A6519 type impact acceleration test at the time of falling. In the walking feeling test, 100 people walked on them and walked. A questionnaire was taken to determine whether the feeling was good or bad, and if more than 50% answered that it was good, it was rated as “〇”. Table 1 shows the results.

[0014]

[Table 1] From Table 1, it can be seen that the specific example is superior to the comparative example in strength by a factor of two or more, and is also effective in abrasion, coefficient of restitution, impact test, and walking feeling. Also,
In the case of golf balls, the color is often white, so that a small amount of pigment is sufficient for providing a desired color.

In the above-described embodiment, the pavement block 1 is composed of only the granular material 2 and the resin binder 3, but if the pavement block 1 needs considerable elasticity, rubber chips or the like having high elasticity may be mixed. . Also, paving block 1
By interposing a rubber chip layer between the base and the base 5, a block having a further improved cushioning function can be obtained. Furthermore, by stacking natural stones and concrete blocks, the paving blocks 1
It is also possible to pave with a simple construction method that only requires laying.

The above-described structure can also be used as a floor for an indoor gymnasium, a door for a general house, or a floor material.

[0017]

As described above, the rubber pulverized granular material structure of the present invention provides a waste rubber having a crosslinked form of a metal salt bridge.
A rubber particle <br/> like product was ground into 0.05~30.00mm the Fuboru, because it is composed of a resin binder sufficient to bind the rubber granules, with its rubber granules and a resin binder rather is good adhesion, it is possible to have a strong strength to the structure. In addition, this rubber granular material is, for example, a conventional waste material.
It charged into the mold immediately after mixing with a resin binder for less hard than the rubber chips of the tire easily performed,
The finished structure can have improved abrasion resistance and can provide a highly resilient and resilient structure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view schematically showing an enlarged part of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pavement block 2 Granular material 3 Resin binder 4 Vent

Claims (1)

(57) [Claims] 1. BR, NBR, EPDM, SBR, NR
A particle having a particle size of 0.05 to 30.00 mm obtained by pulverizing rubber of a waste golf ball containing at least one of the above, a metal salt of an αβ unsaturated fatty acid, an organic peroxide and a filler as main components; And a resin binder sufficient to bind the rubber.