JPS6111284Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is an artificial lawn with excellent abrasion resistance and rigidity, in which two types of filaments are flocked on the surface of a base fabric made of coarse cloth, etc., especially for natural grass. The invention relates to artificial turf that can be used both outdoors and indoors and is suitable for a variety of recreational and sporting activities.

[Conventional technology]

Artificial lawns have been actively developed for several years, but all of them have focused primarily on decorative artificial lawns, with artificial lawns that are permanently installed outdoors and can withstand severe wear and tear from sports shoes, spikes, etc. development was not sufficient. Particularly in the case of artificial turf, users of artificial turf suffer from burns caused by friction when their bodies come into contact with the turf during exercise, and this has been considered a major drawback of artificial turf. That is, there is still no known artificial lawn that has performance comparable to that of natural grass, except for its decorative nature. For example, the appearance of a mown lawn is lost and the appearance resembles a monotonous carpet, and furthermore, the weave bends during use and is difficult to recover, resulting in insufficient durability in terms of appearance. A device to solve this problem has been proposed in Japanese Utility Model Application Publication No. 12811/1983. This proposal was made to eliminate and improve the above-mentioned drawbacks and problems of conventional artificial grass, and in addition to the thick fibers of the conventional artificial grass, the cut pile has thinner crimps. It is characterized by the use of a combination of filaments.

That is, in the artificial lawn of this invention, the thin crimped fibers described above work effectively to cover the ground tissue and provide elastic support to the thick fibers, and one part of the pile
A unit is composed of a set of filaments with different properties. Furthermore, Japanese Utility Model Application Publication No. 53-144971 discloses that the aim is to obtain an artificial lawn that has the appearance and feel of a natural lawn, and also has ball speed, ball bounce, and ball change characteristics similar to natural grass. Multiple flat monofilaments are spliced or twisted onto another multiple flat monofilaments using the core as a core.
By winding and twisting in the range of 70 to 350 T/m, then heat-setting and planting the pile yarn in the form of a cut pile, the top of the pile is flat and upright, and the low pile part is slanted, and the top of the pile is slanted. An artificial lawn characterized by a mixture of high pile parts that maintain a linear or twisted shape has been proposed and disclosed, and the flat threads are made of thermoplastic resin such as polyamide or polyvinylidene chloride, and are especially compressible. Polyamide is said to be suitable from the viewpoint of durability such as elastic recovery.

[Problem that the invention attempts to solve]

However, in the proposal of Utility Model Application Publication No. 55-12811, as shown in the examples, comparative examples, and drawings of the publication, only a hard filament called nylon (polyamide) is used, so thick multifilaments and thin multifilaments are tufted. Compared to soft vinylidene chloride filaments, thin nylon filaments have the disadvantage of having a tactile feel from the resin material and being difficult to prevent burns caused by friction when coming into contact with the body during exercise. Not only that, crimped and thin multifilament makes it difficult to perform needle and tufting operations, making it difficult to maintain quality control, and the finished appearance of the natural grass leaves such that thick leaves and thin leaves are lined up neatly. Although natural grass has the appearance of a mowed lawn as a whole,
It has the disadvantage of showing a detailed appearance that is quite different from natural grass.
In addition, as shown in Figure 2, if a large number of thin crimped multifilaments are bundled and tufted in one place, the supporting effect of the thick multifilaments will be weak, and it will be difficult to prevent burns due to body contact friction after long-term use. There are drawbacks that are difficult to prevent. Furthermore, thin mulch filaments that are not curly but have small bends and are in a jiggly state, even if the height is lower than that of thick filaments, if you look closely at the above, you will notice that they look different from natural grass and are not expected to be effective in preventing burns. There is a drawback that it cannot be done.

In the proposal of Japanese Utility Model Application Publication No. 53-144971, in consideration of the bounce of the ball, the wound and twisted pile yarns are mixed in a higher height than the upright pile yarns. The drawback is that the effect of preventing burns due to body contact friction is significantly lower than that of the proposed artificial lawn. In addition, the pile yarn shown in the examples and drawings is obtained by twisting the core filament and other filaments separately and then combining and twisting them again, so the pile yarn surface is complicated with hard and strong nylon filaments. This not only complicates the operation, but also amplifies the disadvantage of being susceptible to burns. Even if the pile yarn resin is replaced with vinylidene chloride, this drawback cannot be completely solved.

[Means to solve the problem]

This invention solves these demands by combining the characteristics of two types of synthetic fibers, and has a remarkable resemblance to natural grass made entirely of synthetic materials, with abrasion resistance, rigidity, and burn prevention effect due to human contact friction. is good,
The present invention also provides an artificial lawn that is not adversely affected by exposure to climatic conditions and severe wear and tear. That is, according to the present invention, polyester or polyamide upright filaments and vinylidene chloride curl filaments are alternately flocked in the width direction of the base fabric on the surface of the base fabric, and the upright filaments and curled filaments are almost the same. It is a monofilament having a thickness, and a plurality of upright filaments and curled filaments are each bundled, and the bundles are alternately flocked in the width direction at a ratio of 1:2 to 2:1 in the vicinity of multiple locations, and An artificial lawn is provided, characterized in that the top of the upright filament protrudes by 8 to 1 mm relative to the curled filament.

An example of the implementation of the present invention will be described in detail below based on the drawings. Reference numeral 1 denotes a base fabric formed into a belt-like structure by ground weft yarns 2 and ground warp yarns 3. 2 is a ground weft made of water-resistant filaments, 3 is a ground warp made of a synthetic fiber of any weave structure such as plain weave such as multifilament or twill weave, and 4 is flocked to the base fabric 1. 5 is a vinylidene chloride curl filament which is alternately flocked to the base fabric 1 with the upright filaments 4, 6 is an adhesive, and 7 is a backing material. And upright filament 4 and curled filament 5
are monofilaments having approximately the same thickness as shown in FIGS. 1 to 3.

As shown in FIG. 1, on the surface of the base fabric 1, upright filaments 4 made of polyester or polyamide synthetic fibers and curled filaments 4 made of vinylidene chloride synthetic fibers are arranged in a ratio of 1:1 in the width direction of the base fabric 1. The hairs are transplanted in alternating proportions. In addition, Fig. 2 shows a case where upright filaments 4 and curled filaments made of polyester or polyamide synthetic fibers were alternately implanted at a ratio of 1:2 in the width direction of the base fabric 1. The case is shown in Figure 3. That is, in this invention,
By planting the bundle of upright filaments and the bundle of curled filaments alternately in the width direction at a ratio of 1:2 to 2:1, the unique effects of the present invention, which will be detailed below, are achieved.

The method of flocking the filaments 4 and 5 to the base fabric 1 can be accomplished by conventional weaving, knitting, and tufting operations.

As shown in FIGS. 1 to 3, a plurality of upright filaments 4 and curled filaments 5 are each bundled and planted close to each other at a plurality of locations. If multiple filaments are planted in only one place, not only will the appearance be different from that of natural grass, but the curl filament 5 will properly support the upright filament 4, giving it a texture and reducing its long-term durability. I don't like it.

As shown in the figure, the upright filament 4 is slightly longer than the curled filament 5, that is, the top of the filament 4 is about 8 to 1 mm, preferably 2 to 1 mm.
It is necessary to protrude 5mm. If the diameter exceeds 8 mm, the filament will collapse, so an extreme difference, for example, the difference that can be seen from FIG. 2 of Japanese Utility Model Application No. 12811/1983, is not desirable. This reduces the frictional resistance by roughening the density of the grass surface, and maintains the density of the grass itself with curled filaments to maintain the characteristics of grass. Therefore, if the top protrusion is less than 1 mm, this characteristic cannot be maintained, and if it is negative, it is even more undesirable.

Since the upright filament 4 is made of polyester yarn or polyamide fiber, it not only has excellent water resistance and flexibility, but also has improved abrasion resistance when used as grass. Ordinary artificial grass is more likely to cause burns when your body comes into contact with it and gets burned, which is proportional to the density of the piles that make up the artificial grass, and the more rigid the fibers, the more likely you are to get burned. Therefore, by using polyester or polyamide synthetic fibers with strong frictional resistance, the tops of the upright filaments are made to protrude slightly from the curl filaments to make the density of the grass surface rougher. The abrasion resistance is relaxed through interaction with

In addition, curl filament is a crimped filament that uses water-resistant and flexible synthetic fiber strings such as vinylidene chloride, which maintains the density of an artificial lawn and prevents the upright filament from lodging. prevention and improve the elastic recovery rate.

The shape of the curled filament must be curled as shown in FIGS. 1 to 3, and its surface must also be relatively smooth. Twisted state with small bends or relatively large irregularities on the filament surface (for example, irregularities created by wrapping another filament around the filament core)
This cannot solve the problem that the present invention aims to solve.

The upright filament 4 and the curled filament 5 are alternately flocked in the width direction of the base fabric 1, and the upright filament 4 needs to be flocked so that it is slightly longer than the curled filament 5. It is.

As described above, the constructed artificial lawn has the upright filaments 4 straight and regulated, the curled filaments 5 bent in various directions, and both filaments 4,
5 are mixed in an alternating manner, resulting in a formation that is closest to natural grass.

In addition, since the polyamide upright filament 4 and the polyvinylidene chloride curl filament 5 are oriented in various directions, it is possible to lay multiple rows of artificial grass rolled in parallel without extreme straightness or reverseness. It is completely indistinguishable from the outside and looks good without spoiling its beauty.

As explained above, the artificial lawn of the present invention is made by planting a mixture of polyamide-based upright monofilament bundles and vinylidene chloride-based curl monofilament bundles on the surface of the base fabric, with the tops of the upright filaments protruding. Because of its rough surface density, it has extremely high abrasion resistance against burns, and there is almost no risk of burns even if your body comes in contact with it violently.The upright filaments and curled filaments allow it to be used in various directions just like natural grass. It is possible to form an artificial lawn that is closest to a natural lawn.

Furthermore, since the grass grain does not change drastically due to the base fabric, the bounce of the ball is constant in all parts, making it especially suitable as an artificial lawn for tennis courts, baseball, and American football.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view showing an embodiment of the present invention;
FIGS. 2 and 3 are enlarged sectional views showing other embodiments. 1...Base fabric, 2...Ground weft, 3...Ground warp, 4
... Upright filament, 5 ... Curled filament, 6 ... Adhesive, 7 ... Backing material.

Claims (1)

[Scope of utility model registration request] Polyester or polyamide upright filaments and vinylidene chloride curl filaments are alternately flocked on the surface of the base fabric in the width direction of the base fabric, and the upright filaments and curled filaments are monofilaments having approximately the same thickness. A plurality of upright filaments and a plurality of curled filaments are each bundled, and the bundles are alternately implanted in the width direction at a ratio of 1:2 to 2:1, and the upright filament is attached to the curled filament. An artificial lawn characterized by the top of the lawn protruding by 8 to 1 mm.