JPH06264405A - Pavement elastic block - Google Patents

Abstract

PURPOSE:To provide a pavement elastic block which is excellent in durability and strength and impact absorption, and what is more, which is easy to construct by joining a front layer made of a rubber layer with a rear layer made of a needle punching unwoven fabric. CONSTITUTION:A rubber layer-made front layer 2 forming an uneven pattern which displays the shape of a rubber chip on the surface and a needle punching unwoven fabric-made rear layer 3 are joined integrally, thereby forming elastic blocks for pavement service. Preferably, a large number of small holes, which penetrate the rubber layer in the thickness direction, are installed to the front layer 2. Preferably, loop-shaped engagement element groups 5 are installed to the rear side of the rear layer 3. This construction makes it possible to eliminate such disadvantages which may drop out rubber chips during service time or damage or contaminate the surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement elastic block which is paved on an athletic field, a tennis court, a golf course, a park, a poolside, a promenade, a gymnasium or the like.

[0002]

2. Description of the Related Art Recently, not only sports facilities but also hard pavement materials such as concrete and bricks have moderate elasticity, have a good walking feeling, are hard to slip, and are safe to fall down due to shock absorption. For some reason, pavement using elastic blocks has become widespread.

For paving with an elastic block, for example, a topping construction method is used in which a two-component polyurethane resin is applied to the construction surface, a rubber chip made of polyurethane or the like is spread before the polyurethane resin is hardened, and the rubber chip is struck from above. There is.

[0004] In addition, a standing type elastic block for paving obtained by bonding crushed chips of vulcanized rubber with a urethane binder, such as styrene-butadiene rubber, acrylonitrile-butadiene rubber, ethylene-propylene rubber, urethane rubber, etc. There is also a method of using an elastic pavement block in which chips obtained by crushing a vulcanized product of synthetic rubber are bonded with a urethane binder.

[0005]

The pavement of elastic blocks by the above-mentioned topping method, and the laid-down type elastic blocks for paving, in which crushed chips of vulcanized rubber are combined, when these are used for a long time, Since the topping rubber chips and the rubber chips cured with a binder fall off, the surface of the synthetic rubber is damaged and soiled.

Therefore, in order to prevent the rubber chip from falling off, a top coat method of coating a urethane resin or an acrylic resin on the rubber chip layer may be used, but such a method is a construction consisting of two layers or three layers. Since the process is required, the labor for it is complicated, and the strength of the obtained pavement is not satisfactory.

On the other hand, the present invention is of a laid-down type which has characteristics of excellent anti-slip property and strength, and is light in weight, so that it is easy to handle during construction. An elastic block for paving is provided.

[0008]

As shown in FIG. 1, an elastic pavement block according to the present invention has a surface layer 2 made of a rubber layer having a concavo-convex pattern 1 showing the shape of a rubber chip formed on the surface thereof.
And a backing layer 3 made of a needle punching non-woven fabric.

Further, in the elastic block for paving of the present invention, it is preferable that the surface layer 2 made of a rubber layer is provided with a small hole 4 penetrating the rubber layer 2 in the thickness direction. Further, the elastic paving block of the present invention preferably has a loop-shaped engaging element group 5 on the surface of the backing layer 3 made of a nonwoven fabric (the back surface of the elastic paving block body). Further, in an example of the elastic block for paving of the present invention, the surface layer 2 made of a rubber layer is made of a urethane rubber layer, and the back layer 3 made of a non-woven fabric is made of a synthetic fiber non-woven fabric.

In the elastic block for paving of the present invention having the above-mentioned structure, for example, molten rubber is flown on the needle punching nonwoven fabric forming the back layer 3, and while this molten rubber is fluid, silicone is applied to it. The surface pattern material, which is formed by patterning the uneven pattern showing the shape of the rubber chip with rubber or the like, is placed so that the uneven pattern surface of the surface pattern material is in contact with the molten rubber layer, and pressed to obtain the uneven pattern 1 of the rubber chip. It is obtained by a method of forming the rubber layer 2 shaped on the surface and integrally joining the nonwoven fabric forming the back layer 3 and the rubber layer forming the surface layer 2.

Further, molten rubber is poured into a mold having an uneven pattern of rubber chips, and before the molten rubber is cured, the needle punched nonwoven fabric is pressed onto the molten rubber layer to form the needle punched nonwoven fabric forming the back layer 3 and the surface layer 2. It can also be obtained by a method of integrally bonding the formed rubber layer and forming the uneven pattern 1 of the rubber chip on the surface layer 2.

In a pavement elastic block in which a small hole 4 is formed in the surface layer 2 made of a rubber layer so as to penetrate the layer in the thickness direction, the small hole 4 is for allowing water to permeate,
It is intended to prevent the accumulation of water on the surface of the elastic pavement block. The small hole 4 has a diameter of 0.1 to 0.5 m.
It suffices that the number of m or so is 5 to 100 pieces / 10 cm @ 2.

A small hole 4 that penetrates the rubber layer in the thickness direction
The surface layer 2 is formed by a die process in which pins are set up at predetermined locations when the rubber layer forming the surface layer 2 is formed, or by the rubber layer having the uneven pattern 1 of the rubber chip formed on the surface.
And a backing layer 3 made of a needle punching non-woven fabric, and then a rubber layer of the backing layer 3 is mechanically punched.

The elastic block for paving of the present invention is usually formed in a plane rectangular shape having a length of 5 to 50 cm and a width of 15 to 50 cm, but it may be formed in an irregular shape such as a jigsaw puzzle. This block is fixed to the surface to be constructed by nailing or an adhesive. In the case of an elastic paving block having a loop-shaped engaging element group 5 on the back surface of the backing layer 3 made of a needle punching non-woven fabric, a hook-shaped, hook-shaped, mushroom-shaped or the like fixed on the floor material 7 or concrete is used. The surface fastener 8 having the engaging element group is used to construct the floor material 7 or the concrete surface.

[0015]

In the elastic block for paving of the present invention, the surface layer 2 is composed of the rubber layer having the uneven pattern 1 of the rubber chips formed on the surface thereof. It does not fall off and the surface of the synthetic rubber is scratched and soiled, and has an excellent effect on durability and strength.

In the elastic block for paving of the present invention, since the backing layer 3 is formed of a needle punching nonwoven fabric, it has an excellent effect of absorbing impact and is lightweight, and therefore easy to handle. , It has the effect that construction can be performed easily.

[0017]

EXAMPLES The concrete construction of the elastic pavement block of the present invention will be described below with reference to production examples.

Example 1 "Production of surface patterning material" 100 parts by weight of a rubber chip having an average particle size of 3 mm made of a crushed product of a tire and a methylene diisocyanate prepolymer "Mitsui Toatsu Chemical Co., Ltd .: Hyprene BA-20, isocyanate group" Content = 9.0% by weight ”and 20 parts by weight of the mixture are spread on a fluorine-based release sheet“ Chukou Kasei Co., Ltd .: Flow Glass ”by applying pressure to a thickness of about 10 mm, After being left standing for 24 hours at room temperature to be cured, it was peeled from the release sheet to prepare a rubber chip mat.

Then, a silicone rubber "Shin-Etsu Chemical Co., Ltd.
: KE1400 "is applied to a thickness of about 5 mm, left standing at room temperature for 24 hours to cure, and then the silicone rubber sheet is peeled off to accurately transfer the uneven pattern of the rubber chip on the surface of the rubber chip mat. A surface texture material was obtained.

"Manufacture of needle punching non-woven fabric as a backing layer" Fiber diameter 6d, fiber length 64mm, melting temperature about 110
℃ heat fusible polyester fiber "Kuraray Ester-72
0 "30 parts by weight and 70 parts by weight of regular polyester fiber having a fiber diameter of 10 d, a fiber length of 64 mm and a melting temperature of about 220 ° C. were mixed, and a fiber web having a basis weight of 450 g / m 2 was needle punched to obtain a thickness of 4. A 5 mm non-woven fabric was obtained.

"Manufacture of elastic blocks for pavement" Tolylene diisocyanate prepolymer "Mitsui Toatsu Chemical Co., Ltd .:
P-820, isocyanate group content = 5.5% by weight "
100 parts by weight of liquid polyamine curing agent "Mitsui Toatsu Chemicals"
Co., Ltd .: MC-506 "33 parts by weight, pigment paste 3 parts by weight, lead catalyst 1.5 parts by weight A mixture of about 3 m
After forming a coating layer (dissolved rubber layer) having a thickness of m on the above-mentioned needle punching nonwoven fabric, and before the coating layer is cured, the above surface pattern material is applied to the coating layer surface, The rubber chip in the surface pattern material was placed so that the uneven surface of the rubber chip was in contact with the coating layer, and subjected to hot press molding at 115 ° C. for 5 minutes to obtain a press molded body.

Then, the surface pattern material is peeled off from the press-molded body to integrally bond the surface layer of the polyurethane rubber layer having the uneven pattern of the rubber chips formed on the surface and the back layer of the needle punching nonwoven fabric. Was produced. This was cut into a plane rectangle with a length of 20 cm and a width of 30 cm to obtain a pavement elastic block.

Example 2 "Production of Needle Punched Nonwoven Fabric for Backing Layer" Regular polyester short fibers having a fiber diameter of 10 d and a fiber length of 72 mm were passed through a card and a random web, and an average weight of 418 was obtained.
After making a fiber web of g / m @ 2, the fiber web was needle punched to obtain a fiber layer.

Then, the fiber layer obtained in the above step is impregnated in an ethylene-vinyl acetate resin bath and dried to obtain 1
A needle punched non-woven fabric containing 62 g / m @ 2 of ethylene-vinyl acetate resin and having an average weight of 580 g / m @ 2 was obtained.

Subsequently, a regular polyester short fiber having a fiber diameter of 10 d and a fiber length of 72 mm is formed on the back surface of the needle punched nonwoven fabric to form a fiber web having a basis weight of about 180 g / m 2 and containing the ethylene-vinyl acetate resin. The needle punched nonwoven fabric was joined and integrated by needle punching to obtain a composite needle punched nonwoven fabric as a back layer.

The composite needle punching nonwoven fabric as the backing layer has a loop-shaped engaging element group that engages with a surface fastener having an engaging element group such as hook-shaped, mushroom-shaped, and barbecue-shaped members by the fiber web. It is formed on the back surface.

"Manufacture of Elastic Block for Pavement" Using the composite needle punched nonwoven fabric having the above-mentioned loop-shaped engaging element group on the back surface, the process of "Manufacture of elastic block for pavement" of Example 1 will be described below. By the same process as the process, a unitary joined body of a surface layer made of a polyurethane rubber layer having an uneven pattern of rubber chips formed on the surface and a back layer made of a needle punching nonwoven fabric having a loop-shaped engaging element group on the back surface is produced. did. This was cut into a flat square having a length of 40 cm and a width of 40 cm to obtain an elastic pavement block.

[0028]

According to the elastic pavement block of the present invention,
An elastic block excellent in durability, strength, and shock absorption can be easily constructed, and an excellent effect can be obtained in its application.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a coating elastic block according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Uneven pattern, 2 ... Front layer, 3 ... Back layer, 4 ... Small hole, 5 ... Engagement element group.

 ─────────────────────────────────────────────────── --Continued front page (72) Inventor Teruo Inahara 2-10-12 Iwamotocho, Chiyoda-ku, Tokyo Mochida Shoko Co., Ltd.

Claims (3)

[Claims] 1. An elastic block for pavement, which comprises an integrally joined body of a surface layer made of a rubber layer on the surface of which an uneven pattern showing the shape of a rubber chip is formed, and a back layer made of a needle punching nonwoven fabric. 2. The elastic block for pavement according to claim 1, wherein a small hole penetrating the rubber layer in the thickness direction is formed on the surface layer of the rubber layer. 3. The pavement elastic block according to claim 1 or 2, wherein a loop-shaped engaging element group is provided on the back surface of the backing layer made of a non-woven fabric.