JPH0742109A - Artificial turf - Google Patents

Abstract

PURPOSE:To prevent the occurrence of an abrasion of a player due to a slip by increasing the heat capacity of artificial turf via the suction of water by the capillary tube phenomenon, reducing the temperature by the heat, of vaporization, and suppressing the friction heat generated by the slip small. CONSTITUTION:A moisture holding layer 4 is provided in a mat 1 planted with artificial leave stalks 5. Part or all of stalk sections 6 of the lead stalks 5 are made hygroscopic, and the hygroscopic stalk sections 6 are planted to the moisture holding layer 4. The stalk sections 6 are impregnated with the water of the moisture holding layer 4 by the capillary tube phenomenon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial turf laid on the ground of various stadiums.

[0002]

2. Description of the Related Art A conventional artificial turf is constructed by planting leaf stems made of synthetic fibers or the like on a plain woven base fabric having a cushioning material laminated on the back side.

[0003]

In such an artificial turf, since the mat surface and the foliage are made of synthetic resin, they are unexpectedly hard, and even if they are lined with a cushioning material, the athlete will not suffer an accident such as a scratch or a sprain. Since synthetic resin has a poor thermal conductivity, even a slight frictional heat easily causes a high temperature.

For these reasons, the International Football Federation limits the grass of the soccer ground to natural turf, but with natural turf, a great deal of maintenance labor such as sunshine, fertilization, watering, weeding, and lawn mowing, as well as deep knowledge and Requires experience. Also, because of the damage to the lawn, in the case of relatively intense sports such as soccer, the number of days of use is at most once a week or once every 10 days, and it is best not to use the lawn for the rest of the period afterwards. It is said to be preferable. However, since it is difficult to set such a curing period in terms of facility operation, it is desirable to use artificial grass that is easier to manage than natural grass in all respects.

The frictional heat generated during the competition has a great influence on the severity of abrasion of the athlete by the artificial turf. Therefore, if frictional heat is suppressed by some means to reduce heat generation,
The damage caused by abrasion to the athlete will be extremely small, and even artificial grass can be used as the grass of a soccer ground.

The present invention has been conceived from the above, and its purpose is to increase the heat capacity of artificial turf by taking up water by the capillary phenomenon and reduce frictional heat by reducing the temperature by the heat of vaporization. It is intended to provide a new artificial turf which can be suppressed to a small size, and as a result, the generation of scratches on the athlete due to slip can be prevented as much as possible.

[0007]

According to the features of the present invention according to the above object, a water retaining layer is provided in a mat in which artificial leaf stems are planted, and at the same time part or all of the stem portions are made to absorb water. The water-absorbing stem portion is planted up to the water-retaining layer, and the water in the water-retaining layer is impregnated into the stem portion by a capillary phenomenon.

[0008]

[Operation] In the artificial turf having the above-mentioned structure, the water in the water-retaining layer is sucked up and filled into the stem by the capillary phenomenon. The water in the stem increases the heat capacity of the artificial turf, and the water is constantly evaporated from the top opening of the stem, while the water is supplemented by suction, so the heat of vaporization at that time and the heat exchange by the flow of water at that time The temperature on the stem and the surface layer becomes lower.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 in the drawing is a mat, which comprises a laminate of a plain weave surface layer 2, a cushion layer 3 having a required thickness adhered to the back side of the surface layer, and a moisture holding layer 4 as the lowermost layer. On the front side of the mat 1, artificial leaf stems 5 planted in the mat grow at a required density, and a stem portion 6 of a part of the leaf stems is hollow and has water absorption due to a capillary phenomenon.

The surface layer 2 is made of a plain woven fabric of fibers such as hemp, nylon and polyester, and the back surface thereof is made of a foam such as polyethylene or vinyl chloride or a non-woven fabric so that the mat 1 has elasticity suitable for exercise. The cushion layer 3 to be held is integrally bonded.

The moisture retaining layer 4 is made of polyethylene,
Between the upper and lower waterproof sheets 7 and 8 made of polypropylene, vinyl chloride or the like, a porous member made of an elastic synthetic resin,
It is made of a material such as felt, cotton or wool filled with a water-containing material 9 and quilted together with the waterproof sheets 7 and 8 to prevent peeling. The upper waterproof sheet 7 is adhered to the cushion layer 3 to form the surface layer 2 described above. It is integrated with.

The leaf stem 5 and the hollow stem portion 6 are made of flexible synthetic resin such as soft vinyl chloride, and the non-water-absorbing leaf stem 5 is inserted into the mat 1 and adhered to the surface layer 2. However, the lower end of the water-absorptive stalk 6 having both ends open is planted up to the water retention layer 4, and the water 10 poured into the water retention layer 4 is constantly sucked up into the stalk.

An example of fabrication of the above embodiment is shown in FIG.
First, as shown in FIG. 3A, the surface layer 2 and the cushion layer 3
Are bonded together, and the cushion layer 3 is further bonded with the upper waterproof sheet 7 to form a composite 1a. Then complex 1
a thin flexible pipe 6a is sewn into a through a loop,
A pile 11 is formed on both sides of the composite body, and the pile 11 is cut at two locations.

As a result, the pipe 6a becomes the stalk 6 having both ends open, as shown in FIG. 3 (B). After this, the non-water-absorbing leaf stems 5 are planted up to the cushion layer 3, and as shown in FIG. 3 (C), the composite material 1a is added to the water-containing material 9 which is previously stacked on the lower waterproof sheet 8. The upper and lower waterproof sheets 7 and 8 are adhered to each other to form a flat bag having a water injection port, which is omitted in the figure, and a matting process is performed to complete the mat.

Water 1 is added to the water retention layer 4 of the mat 1 as described above.
Although water is injected at 0, an anti-corrosion material is mixed in at the time of water injection to prevent water from spoiling and mold, as well as to prevent suppuration of injuries to athletes.

The water poured into the water retaining layer 4 is first absorbed by the water-containing material 9, and further sucked up by the hollow stem portion 6 by a capillary phenomenon to be impregnated into the stem portion. The water in the stem raises the heat capacity of the artificial turf, and the water constantly evaporates from the top opening of the stem, while the water is supplemented by sucking it up, so the heat of vaporization at that time and a slight flow of water The temperature on the stem portion 6 and the surface layer 2 is lowered by the heat exchange by.

The water retention layer 4 also acts as a cushion in the portion where the load of the athlete is applied after the competition is started. Further, the water in the stem flows out from the upper end opening due to the load applied to the moisture retaining layer 4, but at that time, the surface layer 2 is cooled by the flow of water and the vaporization heat generated at the time of the outflow, so that the friction heat generated during the competition is Since it is absorbed and frictional heat at the time of slip is also suppressed, scratches are less likely to occur.

In the above-mentioned embodiment, a pipe-shaped one is adopted as the stalk 6 having water absorbency, but the stalk 6 is not a pipe-shaped stalk 6 but can take up water by capillarity, for example, a surface. A large number of thin slits may be provided in the above, a plurality of fine fibers may be bundled, and the cross-sectional shape may be arbitrary.

[0019]

As described above, the present invention provides a water retaining layer in a mat in which artificial leaf stalks are planted, and makes part or all of the stems water-absorbent. Since the stalk is planted up to the water retention layer and the water of the water retention layer is impregnated into the stalk by the capillary phenomenon, the temperature of the artificial turf can be reduced, and frictional heat can be suppressed to be small. , It is possible to prevent scratches during competition.

In addition, since it has a water-absorbing property such as being hollow or provided with a slit on the surface, it has an appropriate elasticity, and the grazing of the lawn at the time of traveling is reduced, so that the lawn can be easily exercised. It also prevents long-term fatigue, and withstands long-term use.

Therefore, it can be used in place of natural turf even in comparatively intense competitions such as soccer, and requires less labor for maintenance and management than natural turf. The structure (3) is not so complicated as compared with the conventional structure and can be easily manufactured, because the stems are made water-absorbing and only the water retaining layer is added.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of an embodiment of an artificial turf according to the present invention.

FIG. 2 is a schematic vertical sectional view showing a water absorption state.

FIG. 3 is a schematic vertical sectional view showing the manufacturing steps in order.

[Explanation of symbols]

 1 Mat 2 Surface Layer 3 Cushion Layer 4 Moisture Retaining Layer 5 Leaf Stem 6 Water Absorbing Stem 7,8 Waterproof Sheet 9 Water-Containing Material 10 Water 11 Pile

Claims (1)

[Claims] 1. A water-retaining layer is provided in a mat in which artificial leaf stalks are planted, and part or all of the stalks of the foliage are made water-absorbing, and the water-absorbing stalks up to the water-retaining layer. An artificial turf, which is obtained by planting and impregnating the water in the water-retaining layer into the stem portion by a capillary phenomenon.