JPH0718126B2 - Artificial grass ground with sand - Google Patents

Description

TECHNICAL FIELD The present invention relates to an artificial turf gland in which sand is uniformly dispersed in the grass and the sand is less likely to be unevenly distributed.

[Conventional technology]

So-called grounds such as ball stadiums, ball game courts, field stadiums, etc. have been natural since ancient times, such as soil, sand, and grass.
Improvements have been made to make it easier to play the competition, not to be affected by the weather, and easy to maintain. Nowadays, the grounds for clay and artificial grass are increasing.

Artificial turf grounds have spread rapidly because they are easy to clean and drain well, but they still have drawbacks such as slipperiness and directionality on the grass, and improvements have been desired.

Therefore, there is an attempt to further protect the legs of the athlete by throwing sand into the grass of this artificial grass (Japanese Patent Publication No. 60-4620).
3).

[Problems to be solved by the invention]

Artificial turf usually has a pile yarn made of yarn slit with polypropylene or nylon film on the base material, cuts loops, and the cut pile strips are almost upright in a certain direction. Those having turf are used.

This artificial turf is laid on a stable base such as concrete or asphalt, and sand or soil is sprayed from within the turf. Since there is a gap between the strips where the sand easily enters and a gap where the sand does not easily enter, the strips in the gaps where the sand easily enters are pushed away, and the next sand is easily entered. In other words, if sand enters one place, the sand enters one place after another, and the sand tends to be unevenly distributed. In addition, since artificial grass has grass in a certain direction, it is necessary to always pay attention to the direction in which sand is put, and it is necessary to skillfully put sand evenly.
As a result, unevenness is generated on the ground surface, which hinders the game. Especially in the case of a tennis court or the like, the degree of bounce of the ball is different, which may hinder the play.

Therefore, usually, after sand is added, brushing is performed to smooth the surface, or sand is sucked up and reinserted, but when used for a long time, the sand is unevenly distributed again and often,
Brushing was required, and maintenance of the ground was difficult.

It is considered that the reason for the uneven distribution of sand is that the straight pile yarns are planted almost vertically, so that the direction of the turf is generated, and there are places where sand flows easily and places where it does not flow easily. This is particularly noticeable when the pile areal weight is small.

The present invention has been obtained as a result of investigations for solving the drawbacks of the conventional sand-containing artificial grass ground.

Therefore, an object of the present invention is to provide a sand-filled artificial turf ground which has a function of preventing sand from being hardened, in which sand is uniformly dispersed, maintenance such as brushing is easy.

[Means for solving problems]

In order to achieve the above object, the present invention takes the following means.

That is, the artificial turf ground with sand of the present invention has 10 to 25 mountains / 2.54c
Synthetic resin crimp pile yarn having a crimp of m is laid on a base material as artificial turf and laid on a stable base, and sand is sprinkled in the grass of the artificial turf. Is.

The configuration of the present invention will be specifically described below.

As the artificial grass used in the present invention, it is necessary to use crimped pile yarn.

The type of synthetic resin is not particularly limited, but nylon and polypropylene are generally used, and nylon is preferable from the viewpoint of abrasion resistance.

The pile in which the film is slit is crimped. As the crimping method, conventionally known compression shaping, thermal gear shaping and the like can be used. As the crimped pile of the present invention, 10 to
The range of 25 peaks / 2.54 cm, preferably 15 to 20 peaks / 2.54 cm is important for achieving the effect of the present invention, and particularly 15 to
Those having a range of 20 peaks / 2.54 cm exhibit excellent durability of the effect. Also, the length of the pile strip is 10-25mm
Is preferred. In the present invention, it is essential to use this crimped pile yarn, but it is also possible to mix straight pile yarn. 50% for straight pile
Below, it is preferably mixed in a small amount range of less than 30%.

There is no particular limitation on the particle shape and type of the sand to be sprayed in the grass, but natural silica sand having a high content of silicic acid is the most preferable because the particle shape is close to a spherical shape. In addition to this sand, it is preferable to mix hygroscopic or water-absorbent synthetic resin particles randomly or in a layered form, because the hardening prevention function of the sand layer can be further enhanced.

The artificial turf ground containing sand of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing a cross section of the sand-containing artificial grass ground. Reference numeral 1 is a crimp pile, which is planted on the base cloth 2,
Sand 3 is sprinkled in the gap between the piles. In the figure, the portion stepped on by the player has a shape in which the sand 3 moves downward and is filled with the load, but at the same time, the plurality of crimp piles 1 in the corresponding portion also bend together with the sand 3. Moving. When the load is removed, the plurality of crimped piles 1 behave like springs, and the sand 3 is restored in accordance with the spring behavior.

[Action]

The pile yarn of the artificial turf used in the present invention is crimped, and the strips do not grow straight upward and are bent or curled, so that the gaps between the strips are uneven. The pile yarn is excellent in compression recovery. It is considered that when the sand is sprayed in the turf, the pile strips are bent very complicatedly and entangled with each other, and as a result, the sand is not evenly distributed and is uniformly dispersed. Also,
Since the crimping direction is completely random and has no direction,
Even if it is used for a long period of time, it does not show the directionality of the grass and is less likely to cause the sand to be offset, and it also has the excellent effect of preventing the hardening phenomenon of the sand layer.

〔Example〕

Example 1 On a polypropylene plain fabric substrate, a pile yarn obtained by crimping a slit yarn formed by slitting a nylon film with a fluid processing machine is flocked to produce a cut artificial grass with a strip width of 8.0 mm and a height of 19 mm. Then, the tennis court was constructed by laying it on asphalt and concrete base. As a result of spraying natural silica sand on this and brushing it, the sand was laminated in the grass up to a layer 16 mm from the surface of the base material. The number of crimps of pile yarn was selected to be 0, 10, 15, 20, and 25 for comparison.

By first observing the unevenness of sand mixing from a high place, the state where the sand is first put in and brushing once and the state after this tennis court has been used for 6 months are determined, The results are shown in Table 1.

The uneven distribution of sand was judged by observing it with the naked eye.

X: Innumerable scattered sand is seen, and there are many irregularities on the coat surface.

○: The sand is almost evenly distributed, and there is almost no unevenness.

⊚: Sand is evenly distributed and no irregularities are seen.

As is clear from Table 1, when the pile yarn having crimps is flocked, uniform dispersibility without uneven distribution of sand is maintained as compared with the case where the pile yarn having a crimp number of 0 is flocked. I understand. In addition, when the sand hardening phenomenon was observed after 6 months of use at the same time as these experiments, it was found that the pile yarns having crimps were flocked as compared with the piles having crimps of 0. It was confirmed that it is extremely rich in cushioning properties.

〔The invention's effect〕

The sand-containing artificial grass gland of the present invention uses the artificial grass using the crimped pile yarns, so that when the sand is sprayed, the sand is not unevenly distributed in the grass eyes and is uniformly dispersed. as a result,
The ground surface becomes smooth, and the optimum condition for tennis courts etc. can be obtained.

Further, even if it is used for a long period of time, the sand is not unevenly distributed and maintenance is extremely easy.

[Brief description of drawings]

FIG. 1 is a schematic view showing a cross section of a sand-containing artificial turf ground of the present invention. In the figure 1: Crimped pile 2: Base fabric 3: Sand

Claims (1)

[Claims] 1. A synthetic grass crimped pile yarn having 10 to 25 threads / 2.54 cm of crimped pile is artificial turf is laid on a base material and is laid on a stable base. An artificial turf ground with sand, which is characterized by being sprayed on.