JPH06158609A - Artificial lawn ground containing sand - Google Patents

Abstract

PURPOSE:To improve the cushioning ability of an artificial lawn ground by arranging long lawn leaves among short lawn leaves formed of crimped pile yarns at proper intervals, and scattering sand in artificial lawn textures. CONSTITUTION:Pile yarns are crimped to form the pile yarn for a short lawn leaf 2. For instance, polyester nonwoven fabric is selected as a foundation 4, and the pile yarn is tufted. In this case, long lawn leaves 3 are tufted to the short lawn leaves 2 at fixed intervals, for instance about 18mm, and arranged in a longitudinal texture. The backing material 5 of the foundation is stick to the back face of the tufted pile yarn to form an artificial lawn 1, which is then spreadedly provided on a concrete base 6, and natural silica sand 7 is scattered over the artificial lawn 1, which is brushed to smooth its surface. In addition, the short lawn leaf 2 is set up in 4 length to be more than 3mm, and a difference between the short lawn leaf 2 and the long lawn leaf 3 is set up to be from 5mm to 15mm. Thus the cushioning ability of the artificial lawn ground can be improved so as not to burden a contestant's leg.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial turf gland in which the cushioning property is improved by spraying sand into the turf.

[0002]

2. Description of the Related Art Conventionally, the so-called grounds of ball stadiums and stadiums have been natural soil and lawn, but in recent years artificial grass has been laid so that maintenance can be done easily and competitions can be held even in rainy weather. Many grounds that have been opened are now being seen. In the case of this artificial turf ground, it is more effective than the natural ground in terms of ease of maintenance and drainage, but on the other hand, it is easy for the athlete to slip and it has a cushioning property, so it is easy to hurt the leg. Has been pointed out. Therefore, there is an attempt to sprinkle sand into the grass of this artificial grass to increase the cushioning property and protect the legs of the athlete (for example, Japanese Examined Patent Publication No. 60-46203).

[0003]

However, even if sand is simply sprinkled into the grass of artificial grass and laid on a stable base, a sufficient cushioning effect cannot be obtained. It needs to be fairly dense. In practice, construction technology is often used.For example, a cushioning material such as a rubber material is interposed between the base and the artificial grass, and a stadium or a golf course in which artificial sand with sand is laid is also proposed. (For example, JP-A-60-98003). For a ground with some cushioning material interposed between the artificial turf and the base, it is sufficient to select the cushioning material according to its physical properties in order to provide cushioning properties suitable for each competition. An increase in costs due to an increase in material costs and construction labor is inevitable.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to provide at low cost an artificial turf ground containing sand having a cushioning property that does not put a burden on the athlete's leg, and is a crimped pile yarn made of synthetic resin. Is shortly sown on the entire surface,
It is characterized by laying artificial turf in which long turf leaves are arranged at appropriate intervals, and sand is sprayed into the turf.

Here, since the short turf leaves are for imparting cushioning property by the elastic action and the cushioning action of the scattered sand and turf leaves, it is preferable to form the short turf leaves with pile yarns. Needs to be crimped. This is because the crimped pile yarn has an excellent compression recovery property, is effective for imparting cushioning property to the artificial grass, and the directionality of the turf is difficult to appear, so that the unevenness of sand is unlikely to occur. The pile density of the turf need not be extremely dense, but it is more effective to have a relatively dense pile in consideration of the influence on the manufacturing process and the increase in material cost. Specifically, it is a 5/16 gauge or less and 6 stitches / inch or more.

[0006] Long turf leaves give a direct feel and become artificial turf in appearance, and are arranged at appropriate intervals in short turf leaves, but if the intervals are too narrow, the effect of short turf leaves is small. However, if the spacing is too wide, the appearance of the artificial turf gland will be poor, so a spacing of about 10 to 20 mm is usually preferable.

Since the turf is used for the above-mentioned purpose, the length of the turf is 3 mm or more, and
It is more preferable that the difference between the short turf and the long turf is about 5 mm to 15 mm. In other words, if the length of short turf is less than 3 mm, the cushioning property is difficult to develop, and if the difference in the length of the turf is too small, the scattered sand tends to be unevenly distributed, and the difference in the length of the turf is large. If it is too much, the amount of sand to be sprayed will be large and not only the construction labor will increase, but also the surface of the artificial turf ground will be slippery and the feel will not be good.

The pile yarns that form the turf are, for example, flat yarns using thermoplastic synthetic resins such as polyamide, polyester, polyvinylidene chloride and polypropylene, split yarns obtained by splitting the flat yarns, and monofilaments. Etc. can be used and is appropriately selected depending on physical properties such as abrasion resistance, weather resistance and rigidity required for the pile yarn.

[0009]

According to the present invention, the long turf leaves have a cushioning property and the long turf leaves have an appearance as an artificial turf ground by arranging the long turf leaves in the short turf at appropriate intervals. . The use of crimped pile yarn provides excellent compression recovery and gives artificial turf cushioning properties. In addition, since the direction of the turf is difficult to appear, it is difficult for the sand to shift.

Cushioning is exhibited by setting the length of short turf leaves to about 3 mm or more, and the difference in the length of turf leaves is set to about 5 mm to 15 mm between the short turf leaves and the long turf leaves. The amount of sand to be used became appropriate, uneven distribution of scattered sand was prevented, the slipperiness of the artificial grass ground surface was eliminated, and the feel was even better.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described below with reference to the drawings. FIG. 1 shows a partial cross section of the artificial turf ground containing sand of the present invention.
Reference numeral 1 is an artificial turf of the present invention, and the artificial turf 1 comprises a short turf leaf 2, a long turf leaf 3, a base cloth 4 and a backing material 5 of the base cloth, which is laid on a base 6 and sand 7 Is sprayed up to near the upper part of the long lawn leaf 3.

Example 1 Nylon was selected as the synthetic resin, and the extrusion temperature was 250 ° C., the stretching temperature was 180 ° C., the annealing temperature was 185 ° C., and the stretching ratio was 4.5 times.
00 denier and 200 denier flat yarns were produced. 5 600 denier flat yarns are bundled as they are and twisted 2 times / inch to be used as pile yarn for long turf 3, while 200 200 denier flat yarns are bundled and twisted 2
After 1 turn / inch, it was crimp-processed with a compression shaping crimping machine at 15 threads / inch and used as a pile yarn of a short lawn blade 2.

A polyester non-woven fabric having a basis weight of 120 g / m ² was selected as the base fabric 4 and tufted with pile threads at 5/32 gauge and 10 stitches / inch. At this time, tufts of one long grass leaf at regular intervals (about 18 mm) to four short grass leaves to arrange the long grass leaves in the vertical direction, and the long grass leaves 3 have a pile length of 18 mm and short grass leaves 2 The pile length was 10 mm.

The artificial grass produced by attaching the backing material 5 of the base cloth to the back surface is laid on the concrete base, sprinkled with natural silica sand, and brushed to make the surface smooth. We made artificial sand with sand that can be confirmed about 3 mm on the surface.

Comparative Example 1-1 The 200 denier nylon flat yarn used for the short grass in Example 1 was used as a pile yarn without crimping, and all other conditions and methods were used in Example. A sand-containing artificial grass manufactured in the same manner as in No. 1 was created.

Comparative Example 1-2 The nylon denier of 600 denier used for the long turf in Example 1 was used for the pile yarn, and tufted at 18 mm length over the entire surface without distinction between long and short turf. All other conditions and methods were the same as in Example 1 to produce a sand-containing artificial grass.

Example 2 Polypropylene was selected as the synthetic resin, and the extrusion temperature was 260
A flat monofilament having a denier of 300, a drawing temperature of 160 ° C., an annealing temperature of 170 ° C. and a draw ratio of 4 was produced. 14 flat monofilaments were bundled, twisted 2 times / inch, and further subjected to a crimping process of 18 ridges / inch by a crimping machine of a compression shaping system, and used as pile yarns for long and short turf leaves.

A polyester non-woven fabric having a basis weight of 120 g / m ² was selected as the base fabric and tufted with pile threads at 5/32 gauge and 8 stitches / inch. At this time, one long grass blade is tufted at regular intervals (about 11 mm) to three short grass leaves to arrange the long grass blades in the vertical direction, and the long grass leaves have a pile length of 12 mm and the short grass leaves are piled. The length was 7 mm. Furthermore, lay the artificial grass made by pasting the base material on the back surface on the concrete base,
Natural sand was sprayed and brushed to make the surface smooth, and a long turf was observed on the surface to create an artificial grass containing sand of about 3 mm.

Comparative Example 2-1 The polypropylene flat monofilament used for the turf in Example 2 was used as the pile yarn, and the long turf had a pile length of 12 m.
The pile length of m and short grass leaves was 2 mm, and other conditions and methods were the same as in Example 2 to produce a sand-containing artificial grass.

Comparative Example 2-2 The polypropylene flat monofilament used for the turf in Example 2 was used as the pile yarn, and the long turf had a pile length of 22 m.
The pile length of m and short grass leaves was 5 mm, and other conditions and methods were the same as in Example 2 to prepare a sand-containing artificial grass.

Table 1 shows the results of the sand-filled artificial grasses of Examples and Comparative Examples, which had good cushioning properties immediately after construction and 3 months after the construction, and good and bad appearance due to uneven distribution of sand.

The artificial turf containing sand of Example 1 was the same as Comparative Example 1-1.
Compared with the sand-containing artificial grass, there is a structural difference in whether crimped pile yarn is used for short grass leaves, and the sand-containing artificial grass of Comparative Example 1-2 is a normal sand-containing artificial grass. . Immediately after the construction, the cushioning property and the appearance were usable in both the example and the comparative example, but the state of the artificial turf of the comparative example changed greatly 3 months after the construction. That is, in Comparative Example 1-2, the scattered sand was concentrated in the vicinity of the bottom and had no cushioning property, and uneven distribution of sand was also apparent in appearance. Comparative Example 1-1 is Comparative Example 1-2
To a lesser extent, sand enters the inside of short turf leaves, impeding the elasticity of the pile yarn.

[0023]

[Table 1]

The artificial turf with sand of Example 1 was provided with a cushion even after 3 months since the sand was difficult to move to the inside due to the bent shape and compression recovery of the crimped pile yarn used for short turf leaves. There was sex, and there was no problem in appearance.

Similar effects were observed in Example 2 in which flat monofilament was used for the pile yarn. In addition, in Example 2, Comparative Example 2-1, and Comparative Example 2-2, the effect of the pile length of the long and short turf leaves on the cushioning property and appearance is verified. Here, Comparative Example 2-
No. 1 has a short pile length of 2 mm, which does not exhibit sufficient cushioning properties, and Comparative Example 2-2 has a large pile length difference of 17 mm between long and short turf leaves, and therefore a large amount of sand is scattered. However, the uneven distribution of sand was remarkably exhibited, and some parts with different cushioning properties were produced, which was also unfavorable in appearance. That is, in the present invention, the pile length for forming the turf is preferably 3 mm or more for the short turf, and the difference between the short turf and the long turf is preferably about 5 to 15 mm, which is an effective sand-containing artificial turf. .

[0026]

According to the present invention, the artificial grass having the long grass leaves partially arranged in the vertical direction is laid on the short grass leaves that have been flocked over the entire surface, and the artificial grass grass is a sand-containing artificial grass ground. It has a cushioning property due to the compression recovery property of the turf and the elastic action and the cushioning action of the sand scattered on the upper part and the inside of the turf.

In order to impart the cushioning property to the artificial turf itself, it was necessary to make the pile density extremely high, but in the present invention, it is possible to easily manufacture the turf inexpensively without any special process or technique. it can. Further, since it is not necessary to use a cushioning material or the like as a part or member, the construction labor does not increase. Since crimped yarn is used for the turf leaves, the complex shape of the turf leaves prevents the sand from moving to the inside, maintains compression recovery, and also has the effect of suppressing uneven distribution of sand. It has been made possible.

The artificial turf with sand having the structure of the present invention can be used in, for example, a baseball field, a soccer field, a golf course, a tennis court, a walking path, etc., by selecting the material and shape of the turf, the flocking density and the like. Is also applicable.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a sand-containing artificial turf ground of the present invention.

[Explanation of symbols]

 1 Artificial grass 2 Short grass leaves 3 Long grass leaves 4 Base cloth 5 Base cloth backing material 6 Base material 7 Sand

Claims (2)

[Claims] 1. A synthetic resin crimped pile yarn is planted on the entire surface with short turf leaves, and artificial turf in which long turf leaves are arranged at appropriate intervals is laid, and sand is sprayed into the turf eyes. An artificial turf ground that contains sand. 2. The artificial grass turf containing sand according to claim 1, wherein the short grass is 3 mm or more, and the difference between the short grass and the long grass is 5 mm to 15 mm.