JPH0550541A - Water permeable artificial lawn and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a transparent artificial lawn with a suitable cushion property and without causing steps and undulations on its surface. CONSTITUTION:The artificial lawn is made of a water permeable base material 12 where resilient chips 16 are placed to partially contact with one another and thus formed non-contacted parts construct communicated gaps 18 and the chips 16 are put themselves into a plate-like combination with an adhesive agent on the surface of the chips, and a transparent lawn-shaped surface material 14 that is stuck to one surface of the base material 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial grass having excellent water permeability and a method for producing the same.

[0002]

2. Description of the Related Art Artificial turf is partially used in various sports facilities such as golf courses, driving ranges, baseball fields, and athletic fields because maintenance is unnecessary. As a conventional artificial grass, vinyl chloride resin or styrene-butadiene resin is applied very thinly on the back surface of a sheet of nylon or polypropylene resin piled so that the gaps in the pile are not filled. A permeable surface material having a vinyl chloride resin foam formed on it, a turf-like surface material having a structure in which a vinyl chloride resin or styrene-butadiene resin is applied to the back surface of a sheet-like material in which nylon resin or polypropylene resin is piled up. , Consisting of laminated adhesion with a foam such as polyurethane or rubber, placed on the surface of the above-mentioned grass-like surface material without adhering to the surface of the foam such as polyurethane or rubber, and predetermined on the pile portion of the grass-like surface material There is one in which sand is spread with a thickness and the weight of the sand is used to integrate the grass-like surface material and the foam.

However, although it is water-permeable, since the thickness of the soft vinyl chloride resin foam on the back surface can only be about 5 mm at maximum, the cushioning property is poor and it is not suitable for sports facilities. Alternatively, since there is no water permeability, there is a problem that rainwater or the like collects on the surface of the artificial turf, and a pedestrian or an athlete slips easily. In particular, since an adhesive layer is formed between the turf-shaped surface material and the foam, even if the turf-shaped surface material and the foam are water-permeable, there is a drawback that the presence of the adhesive layer renders the water permeable. Since the grass-like surface material and the foam do not adhere to each other, the difference in the thermal expansion coefficient between the grass-like surface material and the foam easily causes steps or waviness on the artificial grass surface, and in particular, this phenomenon requires a large laying area. It was obvious in some cases.

[0004]

Therefore, in view of the above points, the present invention provides a water-permeable artificial turf which has an appropriate cushioning property and does not cause steps or waviness on the surface, and a method for producing the same.

[0005]

In order to achieve the above object, the present invention adheres the chip of the elastic body to the surface of the chip so as to partially contact the chip and form a gap in which the non-contact portion communicates. The water-permeable artificial turf is composed of a water-permeable base material bonded in a plate shape with an agent and a water-permeable grass-like surface material adhered to one surface of the base material with an adhesive on the chip surface.
In addition, in order to manufacture the water-permeable artificial grass, a water-permeable grass-like surface material is installed in the mold, and a chip with an adhesive attached to the elastic chip surface on the back side of the water-permeable grass-like surface material. By filling the mixture and pressing the chip mixture and the water-permeable turf-like surface material so as to form a gap in which the non-contact portions communicate with each other by partially contacting the chips, the adhesive of the chip is At the same time as forming the water-permeable base material composed of a bond, the water-permeable base material and the water-permeable grass-like surface material were made to adhere to each other.

[0006]

In the water-permeable artificial turf of the present invention, rainwater or the like that has landed on the surface passes through the water-permeable turf-like surface material to reach the water-permeable base material, and further the gaps between the chips constituting the water-permeable base material. Through to the outside. Further, since the water-permeable base material is made of a plate-like shape in which elastic chips are combined, the thickness of the base material can be freely set according to the amount of chips, and optimum cushioning properties can be obtained. Further, since the water-permeable turf-like surface material and the water-permeable base material are adhered to each other, they are integrally expanded and contracted with respect to a temperature change, and there is no step or waviness on the surface.

On the other hand, in the method for producing a water-permeable artificial turf according to the present invention, the chip mixture filled in the back side of the water-permeable turf-like surface material in the molding die is brought into partial contact between the chips and the non-contact portion is in communication. Since the adhesive on the chip surface is hardened by pressing so as to form the gap, a water-permeable base material having a communicating gap inside is formed, and at the same time, the water-permeable base material and the water-permeable turf-like material are formed. Adhesive integration with the surface material can be performed.

The chips in the water-permeable artificial turf and the method for producing the same are made of foamed or vulcanized rubber such as rubber, urethane elastomer, ethylene-vinyl acetate copolymer (EVA), polystyrene, polyvinyl chloride resin, urea resin and the like. The pulverized product may be used alone or in a mixture. The size and density of the chips depend on the material of the chips, but from the viewpoint of ensuring good walking feeling and water permeability on the surface of the water-permeable artificial grass, the diameter is about 2-10 mm and 30-400 kg / m ³ Is preferred. Further, the thickness and density of the water-permeable base material are 10 to 30.
mm, preferably about 100 to 500 kg / m ³ .

As the water-permeable turf-like surface material, a vinyl chloride resin or a styrene-butadiene resin is thinly formed on the back surface of a sheet-shaped material in which a nylon resin or a polypropylene resin is made into a pile shape so that the gap between the piles is not completely filled. Vinyl chloride resin or styrene-butadiene resin is applied to the back surface of the above-mentioned pile-shaped sheet-like material or a partially formed vinyl chloride resin foam, and punching is performed to impart water permeability. Those that are suitable are preferred. Of course, the water-permeable grass-like surface material is not limited to these, and any material having a grass-like atmosphere and being water-permeable may be used.

Epoxy-based, urethane-based, vinyl-based, and acid-based adhesives are used as the adhesive that adheres to the chip surface to bond the chips to each other and to bond the water-permeable grass-like surface material and the water-permeable substrate. be able to. The adhesive can be easily attached by mixing a predetermined amount of chips and the adhesive. The amount of the adhesive used at that time varies depending on the material, weight, etc. of the chip, but is approximately 5 to 30 parts by weight with respect to 100 parts by weight of the chip.

Further, the pressing of the chip mixture and the water-permeable turf-like surface material at the time of manufacturing is appropriately selected from a hot press, a room temperature press, a steam injection press and the like depending on the kind of the adhesive. The heating press usually has a temperature of 100 to 200.
° C., for 5 to 30 minutes press at a press pressure of 0.05~0.2kg / cm ^2. Further, in a press using steam, steam is blown into the molding die after the above-mentioned heating press is completed. On the other hand, a normal temperature press usually has a press pressure of 0.05 to 0.2 kg / cm at room temperature.
After pressing at ² , the mold is fixed as it is with a clamp and left for 10 hours to 1 week.

[0012]

EXAMPLES Examples of the present invention will be described below. Figure 1
Is a cross-sectional view of an embodiment of the water-permeable artificial turf according to the present invention, and FIG. 2 is a cross-sectional view showing the production of the water-permeable artificial turf.

The water-permeable artificial grass 10 comprises a water-permeable substrate 12 and a water-permeable grass-like surface material 14 adhered to the surface thereof.
The water-permeable substrate 12 is a chip 16 having a particle size of 3 to 6 mm, which is formed by crushing a rubber sponge having a density of 100 to 250 kg / m ³ .
300 × 300 × 15 with urethane adhesive on the chip surface
The gap 1 is formed by connecting the chips 16 to each other partially, and communicates with the rest of the non-contact parts.
It has eight. The density of the water-permeable substrate 12 is 300 kg / m ³ , and the adhesive strength is 20 kg / cm ² (JIS
K 6301). On the other hand, water-permeable grass-like surface material 1
Reference numeral 4 is a sheet-like material in which a nylon resin is formed into a pile, and a vinyl chloride resin applied to the back surface of the nylon resin and cured to give water permeability by punching, and constitutes the water-permeable substrate 12. It is adhered to the water-permeable base material 12 using an adhesive on the surface of the chip 16. The water permeability of the water-permeable artificial turf 10 in this example (JIS A 1
218) is 2 × 10 ^-2 .

Next, a method of manufacturing the water-permeable artificial turf 10 will be described. First, the mold space is 300 x 300 x 30
The water-permeable turf-like surface material 14 is placed in a molding die 20 of mm with the turf-like side (surface side) being the die surface side. Next, the chip 1 having the above-mentioned density of 100 to 250 kg / m ³ and a particle size of 3 to 6 mm
The mixed chip 410g in which 100 parts by weight of 6 and 10 parts by weight of a urethane-based adhesive are mixed and the adhesive is adhered to the surface of the chip 16 is filled in the back side of the water-permeable grass-like surface material 14 in the molding die 20. To do. Then, the molding die is heated to 170 ° C., the mixed chip and the water-permeable turf-like surface material are pressed by the pressing device 22 at a pressure of 0.1 kg / cm ² for 10 minutes, and then the molded product is taken out and the water-permeable artificial turf 10 is used. Got The pressure at the time of pressing and the temperature of the molding die are within a range that does not deform the pile-like sheet-like material. Further, in order to prevent the thermal deformation of the pile-like sheet material more reliably, a heat insulating material such as a hard urethane foam may be arranged on the inner surface of the forming die where the water-permeable grass-like surface material is located.

[0015]

EFFECTS OF THE INVENTION Since the water-permeable artificial grass of the present invention has the above-mentioned structure, rainwater etc. that has fallen on the surface is promptly drained to the outside through the gaps between the chips, so that pedestrians, athletes, etc. can be prevented from sliding. Can be prevented. Further, desired cushioning properties can be obtained by changing the density of chips constituting the water-permeable substrate, the amount of chips, and the degree of pressure bonding between the chips. Furthermore, since the water-permeable turf-like surface material and the water-permeable base material are bonded and integrated, there is no step or waviness due to temperature change.

On the other hand, in the method for producing a water-permeable artificial grass, the work can be simplified because the water-permeable substrate and the water-permeable grass-like surface material can be bonded and integrated simultaneously with the molding of the water-permeable substrate.
Moreover, since the chip mixture and the water-permeable grass-like surface material are pressed so that the chips are brought into partial contact with each other, the pressing pressure can be set sufficiently low, and the grass-like portion of the water-permeable grass-like surface material can be deformed. Absent. In addition, the cushioning property and water permeability of the water-permeable artificial turf obtained can be easily changed by adjusting the amount of chips to be put into the molding die and the pressing pressure.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the water-permeable artificial turf of the present invention.

FIG. 2 is a cross-sectional view showing the production of the water-permeable artificial turf of the present invention.

[Brief explanation of reference numerals] 10 Water-permeable artificial grass 12 Water-permeable substrate 14 Water-permeable grass-like surface material 16 Chips 18 Gap between chips 20 Mold

Claims (2)

[Claims] 1. An elastic tip is partially contacted,
A water-permeable base material in which the chips are bonded in a plate shape with an adhesive on the chip surface so as to form a gap in which the non-contact parts communicate with each other, and a water-permeable grass-like surface material adhered to one surface of the base material. A water-permeable artificial turf consisting of. 2. A water-permeable turf-shaped surface material is installed in a molding die, and the back side of the water-permeable turf-shaped surface material is filled with a chip mixture in which an adhesive is attached to a chip surface of an elastic body. Water permeability consisting of chip bonding by pressing the chip mixture and the water-permeable turf-like surface material so as to form a gap where the chips are in partial contact and the non-contact parts are in communication, and the adhesive is cured. A method for producing a water-permeable artificial grass, which comprises forming a base material and adhering the water-permeable base material and the water-permeable grass-like surface material.