JP2553964B2 - Artificial grass base material and method for manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial turf base material used for an artificial turf structure suitable for the ground surface of a golf course such as fairways, walking paths, tee grounds, parks and playgrounds, and in particular tee grounds for golf courses. The present invention relates to an artificial turf substrate for an artificial turf structure, which can be preferably used in the above, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally used artificial turf is a braided fabric produced by a tuft machine, which is a knitted fabric in which a loop made of fine yarn in which pile threads are planted is projected, The length of the turf is 2-3 because the lining is fixed by coating rubber or vinyl chloride.
It was as short as cm and weak in strength. Therefore, when such artificial turf is used as a tee ground at a golf course, there is a problem that the fibrillated filament yarn is stripped from the cloth by a tee shot and cannot be used for a long time. On the other hand, recently, a technique has been proposed in which a seedling-shaped artificial grass member is incorporated and fixed in a plastic frame formed in a grid pattern. However, this type of artificial turf has a drawback that it does not have a natural feeling as turf and the sand filled between the turf and the turf cannot be pierced. On the other hand, artificial turf with a pipe-shaped member or a holder embedded as a piercing hole of a tee at a constant interval, for example, a width of 20 to 30 cm is commercially available. However, since the piercing position of the tee is fixed, a player In addition to not being liked, there is a problem that broken tea remains in the holder.

In view of the above circumstances, the present inventors have made extensive studies to solve the above problems, developed various techniques,
Patent applications have already been filed (Japanese Patent Application Nos. 1-80991 and 1-87237, etc.), however, artificial turf that is hard to peel off the thin yarns that have been flocked from the fabric due to tee shots, etc. has not yet been obtained.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, the fine yarn constituting the turf is easily fixed to the support of the artificial turf easily, and even if the fine yarn is rubbed by a tee shot or the like, the fine yarn is removed from the support. The purpose is to provide a difficult artificial grass base material. Another object of the present invention is to provide a method capable of efficiently producing such an artificial turf substrate.

[0005]

SUMMARY OF THE INVENTION According to the present invention, an artificial turf can efficiently solve the above-mentioned problems by arranging a plurality of bifurcated members such as U-shape and V-shape juxtaposed and connecting them by connecting members. This was done based on the finding that a base material could be obtained.

That is, according to the present invention, a plurality of upright members obtained by bending a flexible cord-like material into a substantially bifurcated shape are juxtaposed, and the bifurcated portions of the upright members are connected by a flexible connecting member. An artificial grass base material is provided.

Next, the artificial turf substrate of the present invention will be described with reference to the drawings. FIG. 1 shows a perspective view of an artificial turf substrate 1 of the present invention. A belt-shaped member 4 and a sewing thread 5 in which a bifurcated portion of a plurality of juxtaposed standing members 2 is a connecting member 3. Are linked by. Here, as the standing member, a flat yarn or a monofilament yarn or a deformed monofilament yarn made of a flexible plastic such as nylon, polypropylene, or polyethylene, particularly a thermoplastic plastic, is formed into a thick denier by twisting together. It is preferable to use a flexible cord-shaped material made of the above yarn, which is formed by bending it into a U-shape or a V-shape. Here, the flexible string-like material constituting the standing member has a total denier number of 10,000 to 50,000.
0 is preferable, and particularly 20,000 to 30,000.
Denier is preferred. In the present invention, the height of the upright member may be arbitrary, but is 30 mm to 100 mm.
Is preferably 40 mm to 80 mm, more preferably 50 mm to 60 mm. However, when used for walking roads, 20 mm to 40 mm is sufficient.

As the belt-shaped member which is the connecting member, it is preferable to use a flexible plastic such as polypropylene or polyethylene, and it is particularly preferable that the width is 5 to 20 mm and the thickness is 0.5 to 2 mm. As the sewing thread, it is preferable to use one for heavy-duty heavy-weight sewing, and it is particularly preferable to use one having a denier of 1,000 to 2,500. In the present invention, both the standing member 2 and the connecting member 3 are preferably colored green in order to manufacture the artificial grass, but the present invention is not limited to this.

In the present invention, it is sufficient to connect the bifurcated portions of the upright member 2 with the connecting member 3, but as shown in FIG.
It is preferable to connect with since the strength is further improved. In this case, it is preferable to connect a range of 25 to 30 mm from the upper end of the standing member 2. In FIG. 1, the belt-shaped member 4 is arranged so as to pass through the bifurcated portion of the standing member 2, and the standing member 2 is connected by the connecting member 3 by sewing a sewing machine on the belt-shaped member 4. As shown in FIG. 2, without passing the connecting member 3 between the forked portions of the standing member 2,
Alternatively, the belt-shaped member 4 may be placed on the uprighting member 2 and a sewing machine may be sewn on the belt-shaped member 4 for connection. Further, as shown in FIG. 3, the standing member 2 may be connected to each other using only the sewing thread 5 without using the belt-shaped member 4 as the connecting member 3. further,
Only the belt-shaped member 4 is used as the connecting member 3, and the standing member 2 is used.
It may be connected by using an adhesive, or may be connected by heat sealing.

The artificial turf substrate of the present invention can be manufactured by any method as long as it has the above-mentioned structure. However, as shown in FIG. 4, the flexible cord material 8 is moved in the axial direction 9. While reciprocating while connecting the flexible cord-like material 8 with at least one flexible connecting member 3 substantially parallel to the axis, the portion not connected with the connecting member of the flexible cord-like material According to the method of cutting the substantially parallel to the axis,
The artificial turf substrate of the present invention can be manufactured extremely efficiently. It should be noted that FIG. 4 shows a state of cutting along the axis (center line) 9 in order to cut the portion which is not connected by the connecting member of the flexible string-like material. When cut, two artificial turf substrates are obtained one above the other, and no material loss occurs, which is preferable. However, it is also possible to cut parallel to the axis at the position 10 shown in FIG. It is also possible to form the flexible cord-shaped material 8 in a spiral shape, crush it so as to form one flat surface, and then connect it with a connecting member.

The artificial turf substrate according to the present invention is, for example, the fifth one.
As shown in the figure, the artificial turf structure 1 is fixed to the support body 15
6 can be preferably used. At this time, although the support 15 is initially in a liquid state, if a support that is soaked in the artificial turf substrate and then solidified is used, the support material also enters the bifurcated portion of the artificial turf substrate. The upright member can be firmly fixed to the support 15.

As such a liquid material, for example, inorganic particles and foamed elastomer particles are added to a polyol or a mixture of a polyol and a crosslinking agent described in Japanese Patent Application No. 1-128062, and then an isocyanate compound is added. A liquid mixture may be used, and the artificial turf substrate is immersed in the liquid mixture and then cured. Here, as the inorganic particles, a particle size of 0.
05 to 3.5 mm, preferably 0.1 to 2.5 mm of sand, glass particles, talc, calcium carbonate (calcium charcoal), clay, etc., and the foamed elastomer particles have an apparent specific gravity of 0.2 to 0.8 butadiene rubber (BR), butyl rubber (IIR), ethylene propylene rubber (EPDM), nitrile rubber (NBR), natural rubber (NR), urethane rubber (U), synthetic natural rubber (IR), and styrene butadiene Examples of the particles include rubber (SBR). Examples of the isocyanate compound include various compounds such as tolylene diisocyanate and diphenylmethane diisocyanate, which are compounds having two or more isocyanate groups in the molecule, and polyols are compounds having two or more hydroxyl groups in the molecule. Polyether polyols,
Various types such as polyester polyols may be mentioned.

Further, as another liquid material, for example,
A composition for a ground structure, which comprises a dispersion of a rubber fragment, a sand and a polymer having rubber elasticity, described in JP-A-2-289702. In particular, when these liquid materials are used, the elasticity and strength of the support become just good for piercing the tee, so an artificial turf structure in which the artificial turf substrate of the present invention is implanted in such a support is a tee. It can be suitably used as a ground. Further, it can be used for fairways, roads, and parks other than the tea ground. When used as a tee ground, it is preferable to implant the artificial turf base material so that the surface of the turf is about 15 to 25 mm from the upper surface of the support, and the artificial turf base material in each row is about 20 to 35 mm. It is good to open and plant. When the support is formed by using the liquid material, the support is filled with an inorganic substance, so that natural grass can be planted there.

[0014]

EFFECT OF THE INVENTION According to the present invention, the fine yarn constituting the turf is easily firmly fixed to the support of the artificial turf, and even if the fine yarn is rubbed by an iron shot or the like, the artificial turf is hardly removed from the support. A substrate can be provided. Therefore,
By immersing this artificial turf substrate in a liquid material and then solidifying the liquid material to form a support, an artificial turf structure in which the artificial turf is extremely difficult to come out can be obtained. The artificial turf substrate shown in FIG. 3 is arranged in an appropriate shape on the ground, and when the natural turf is mixed and cured, the natural turf and the artificial turf having strong roots can coexist. Further, according to the manufacturing method of the present invention, the artificial grass base material can be manufactured extremely efficiently.

Therefore, the artificial turf structure incorporating the artificial turf substrate of the present invention is used as an artificial turf suitable for the ground surface such as a fairway, a walking path, a tee ground, a park, and a playground of a golf course. It can be preferably used in a tea ground or the like. The artificial grass structure can be planted in a part of the ground where natural grass is planted.

[0016]

【Example】

Example 1 A 26,000 denier polypropylene yarn (colored green) was reciprocated while moving in the direction of the axis 9 as shown in FIG. 4, and the lower two points and the upper two points of the axis 9 were shown in FIG. As shown, the belt-shaped member 4 which is the connecting member 3
(Width 20 mm, thickness 0.6μ, made of polypropylene) is passed between the bifurcated parts, and this is applied from above to the sewing thread 5 (1,600
Denier) is used for sewing and connecting, and another sewing thread 6 is used for sewing the upper part of the bifurcated portion, and then cut at the position of the axis 9 to make two rows of artificial turf bases. Material 1 was manufactured. The artificial turf substrate 1 was put in the mold in parallel at intervals of 30 mm.

Here, as the liquid material, polyurethane prepolymer (one-component polyurethane, Sanyo Kasei Co., Ltd.)
Sanprene BD-04B) 100 parts by weight, curing agent (triethanolamine) 8.7 parts by weight, inorganic particles (sand, sea sand average particle size 0.4 mm) 280 parts by weight, foamed elastomer particles (apparent specific gravity of about 0. 62, a liquid mixture of 120 parts by weight of ethylene propylene rubber (EPDM foam having a foaming ratio of about 2.1) is injected into the frame so that the upper part of the turf 10 to 20 mm protrudes from the support 15. After curing, the artificial grass structure 16 shown in FIG. 5 was manufactured.

When this artificial turf structure 16 was used for a ground, the artificial turf had very few omissions.

[Brief description of drawings]

FIG. 1 is a perspective view of an artificial turf substrate of the present invention.

FIG. 2 is a perspective view of an artificial turf substrate according to another embodiment of the present invention.

FIG. 3 is a perspective view of an artificial turf substrate according to another embodiment of the present invention.

FIG. 4 is a schematic view showing a method for manufacturing an artificial turf substrate of the present invention.

FIG. 5 is a schematic diagram of an artificial turf structure manufactured using the artificial turf substrate of the present invention.

[Explanation of symbols] 1 artificial grass base material 2 standing member 3 connecting member 4 band member 5 sewing thread 8 flexible string material 9 axis 15 support 16 artificial grass structure

Claims (2)

(57) [Claims] 1. A plurality of upright members obtained by bending a flexible string material into a substantially bifurcated shape are juxtaposed, and the bifurcated portions of the upright members are made of a flexible plastic material and have a width of 5 to 20 m.
An artificial turf substrate characterized by being connected by a belt-shaped connecting member having a thickness of 0.5 to 2 mm. 2. The flexible cord-shaped material is moved in the direction perpendicular to the axis while moving in the axial direction, and the flexible cord-shaped material is substantially parallel to the axis with at least one strip-shaped connecting member. Is a flexible string-shaped material, and a portion of the flexible string-shaped material that is not connected by a strip-shaped connecting member is cut substantially parallel to the axis, and the strip-shaped connecting member is a flexible method. Made of flexible plastic material, width 5-20m
The manufacturing method is a strip-shaped connecting member having a thickness of 0.5 and a thickness of 0.5 to 2 mm.