JPH0442330Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an elastic floor pavement structure suitable for golf course routes, promenades, tennis courts, gymnasium floors, etc.

[Conventional technology]

Elastic floors, which are made by coating a base of concrete, asphalt concrete, mortar, synthetic resin, etc. with a primer, etc. as necessary, and bonding various waste tire rubber granules with a binder, are inexpensive and are used for tennis courts, Many of them have been installed on sports facilities such as golf course routes, gymnasium floors, and walking trails.

[The problem that the invention is trying to solve]

These elastic floors have the disadvantage that they tend to swell over time after construction, and cracks tend to occur due to poor adhesion between waste tire rubber particles and the binder. The biggest reason for this is that the type of material used in the waste tire rubber granules and the type and amount of additives used during the pouring process are not constant among tire manufacturers, which results in the adhesive strength when bonded with a binder. This is because there is a very large difference in

[Structure of the idea]

The object of the present invention is to provide a highly durable elastic floor pavement structure that does not have the above-mentioned drawbacks, that is, does not cause blisters, cracks, etc.

That is, the present invention has (A) a substrate, (B) an average particle size of 2 to 10
A cushion layer made by bonding granular waste tire rubber of 2 mm in size with a one-component moisture-curing polyurethane binder is provided as a base layer, and (C) polyurethane rubber elastic granules with an average particle size of 2 to 10 mm are further provided on the base layer. This is an elastic floor pavement structure comprising a surface layer in which (D) the base layer and the surface layer have approximately the same particle size. That is, by fixing conventional waste tire rubber granules with a one-component moisture-curing polyurethane binder and then bonding polyurethane rubber elastic granules with the same binder to form a surface layer, the waste tire rubber granules consolidated base layer becomes a cushion. It is possible to prevent the occurrence of blisters and cracks by forming a laminate due to the strength and toughness of the surface layer of the solidified polyurethane rubber elastic particles.

The elastic body obtained by this invention can be used for gymnasium floors, etc., which particularly require cushioning properties, functionality, etc., by increasing the ratio of the base layer, and on the other hand, for golf course routes, etc., which have harsh conditions. In this case, it is necessary to increase the ratio of the surface layer, but this ratio is not limited.

Hereinafter, the configuration of the present invention will be explained based on the drawings.

As the base 1, asphalt concrete,
Known materials such as concrete, mortar, and synthetic resin can be used. Average particle size 2~ used for base layer 2
The 10 mm waste tire rubber granules include various synthetic rubbers used in tires (e.g. SBR, NBR,
CR, isoprene rubber, ethylene-propylene copolymer rubber) are used.

As the one-component moisture-curable polyurethane binder, a known one-component moisture-curable polyurethane resin is used. The polyurethane rubber elastic granules used for the surface layer 3 may be prepared using known systems, such as two-component urethane blends, moisture-curable one-component urethane blends, and thermoplastic urethane blends using the prepolymer method, partial prepolymer method, and one-shot method. Particles with an average particle diameter of about 2 to 10 mm are used by pulverizing a cured product such as a compound.

A primer is applied on the substrate 1 as necessary, and the waste tire rubber granules are bonded and cured using a one-component moisture-curable polyurethane resin as a binder to form the base layer 2. By forming a laminate of polyurethane rubber elastic particles on the base layer 2 and the surface layer 3 bound with the binder, an elastic floor having the structure of the present invention can be obtained. The feature of the present invention is to provide a structure particularly excellent in shock absorption by making the particle diameters of the granules in the base layer and the surface layer almost equal.

The present invention is characterized by making the particle diameters of the upper and lower layers approximately equal, thereby generating overall stress dispersion, increasing the amount of strain, and maintaining soft cushioning properties.

Furthermore, when the present structure is used outdoors, since the surface layer portion is not dense, there is less occurrence of clogging with earth and sand, and no accumulation of rainwater or the like occurs. When water accumulates in this structure, the inside of the structure becomes moist and hot as the temperature rises due to direct sunlight in the summer, promoting hydrolysis of the binder and the like.

The structure of the present invention improves water permeability and prevents water accumulation in the structure by making the particle sizes of the upper and lower layers almost equal and making the voids in the structure uniform. This product has excellent durability because it prevents the wear and tear, and it is also economical because it uses waste tire rubber granules as the base layer.

Application example One-component moisture-curing urethane (product name: Deitsku Primer U, manufactured by Dainippon Ink & Chemicals Co., Ltd.) is applied as a primer on a smooth concrete base, and SBR waste tire rubber granules (rounds) are applied on top of the primer. 400 parts (manufactured by Gogomu Co., Ltd., average particle size 3 to 5 mm) and a moisture-curing urethane resin (trade name: Pandex TP-1139, manufactured by Dainippon Ink and Chemicals Co., Ltd.) to serve as a binder.
Spread a mixture of 100 parts to a thickness of 12 mm on a primer-treated base to form a base layer. As a surface layer on this base layer, apply the above binder to 500 parts of polyurethane rubber elastic granules with an average diameter of 3 to 5 mm obtained by crushing a cured product of a two-component urethane compound.
A mixture of 100 parts was spread and rolled to a thickness of 5 mm.

The elastic floor thus obtained (total thickness 17
mm) did not swell or crack over time, and when tested outdoors (on a golf course route), it remained in good condition even after more than 3 years had passed.

Comparative construction example The same primer used in the construction example was applied onto a smooth concrete base, and a mixture of 400 parts of the SBR waste tire rubber granules used in the construction example and 100 parts of polyurethane binder was applied on top to a thickness of 17 mm. The material was spread out and compacted.

When the elastic floor thus obtained was tested outdoors (on the path of a golf course), it cracked after 6 months and could not be used as an elastic floor pavement.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the structure of the elastic floor pavement of the present invention. 1...Base, 2...Underlayer, 3...Surface layer.

Claims (1)

[Scope of Claim for Utility Model Registration] (A) On a base, (B) A cushion layer formed by binding waste tire rubber particles with an average particle size of 2 to 10 mm with a one-component moisture-curing polyurethane binder as a base layer. (C) further providing on the base layer a surface layer in which polyurethane rubber elastic granules having an average particle size of 2 to 10 mm are bonded with the binder; (D) particles of the granules in the base layer and the surface layer; An elastic floor pavement structure with approximately equal diameters.