JP2512360B2 - Artificial grass structure - 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 structure, and in particular, an artificial turf suitable for use in a golf course, a driving range, etc. due to its greatly improved durability. It concerns structures.

[0002]

[Technical Technology] Conventionally, as artificial grass, for braided base cloth,
Fiber bundles such as polypropylene, flat yarns made of polyethylene, nylon, polyester, vinylidene chloride, etc. are flocked by a tufting machine, and this is projected,
An artificial turf is known in which an adhesive layer made of rubber, latex or the like and a reinforcing base fabric made of nylon or the like are sequentially bonded from the back side of a braided base fabric. However, conventional artificial grass has a large number of flock holes formed by flocking fiber bundles,
Wear resistance and durability such as tensile strength and tear strength were not sufficient.

Therefore, the inventors of the present invention provide an artificial turf structure which is high in strength, durable, and has a natural feeling close to that of natural turf, at a low cost, in which the drawbacks of the conventional artificial turf structure are improved. For that purpose, an artificial turf structure has been developed in which the root part of the turf member including a bundle of fibrous members is fixed with a clay-sand bond (JP-A-2-47405). Furthermore, when this artificial turf structure is used on the tee ground of a golf course and is struck with an iron many times, the turf member including the fibrous member gradually rises, and finally the turf member falls off. In order to improve the drawbacks, an artificial turf structure has been developed in which the base of a turf member including a bundle of fibrous members is fixed by a fixing member, and the turf member and the fixing member are fixed by a bonding layer ( JP-A-3-28404).

The invention of these artificial turf structures has made it possible to obtain excellent artificial turf structures having high strength, durability and a natural feeling close to that of natural turf. Even if it is a turf structure, when it is used at a golf course or a golf practice range and repeatedly struck with an iron, durability against impact force and friction force is still insufficient, and the turf member rises up There was a problem that the surface of the union was destroyed. Therefore, it is necessary to further increase the strength and the durability of the artificial grass structure.

As a result of the investigations by the present inventors regarding the above-mentioned problems, the artificial grass structure was
When it is struck intensively from 0,000 to 40,000 times, the surface layer of the sediment mixture is destroyed, the flocked part of the grass member rises, and the structure becomes weak, whereas the grass member and the grass member of the artificial grass structure If a reinforcing material is provided between and, even if the artificial turf structure is hit with a golf iron 50,000 to 60,000 times intensively, not only the surface layer of the clay and sand binder is slightly destroyed, but also the structure. The result was that it did not become brittle, and the abrasion of the grass member itself was also small. The present invention has been made based on this finding.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides an artificial turf structure having a significantly improved durability, particularly an artificial turf structure having a long service life, which is suitable for use in a golf course, a driving range, etc. Intended to provide the body.

[0007]

In order to solve the above problems, the present invention is an artificial turf structure in which a plurality of rows of turf members including a bundle of fibrous members are fixed in parallel at predetermined intervals by a bonding layer. And, there is provided an artificial turf structure characterized in that a reinforcing member is provided between the turf member and the turf member in parallel with the turf member.

Further, according to the present invention, a turf member containing a bundle of fibrous members is fixed by a fixing member, and the turf member and the fixing member are fixed in parallel by a bonding layer in a plurality of rows at a predetermined interval. Provided is a turf structure, wherein a reinforcing member is provided between the turf member and the turf member in parallel with the turf member. Furthermore, the present invention provides the artificial turf structure in which the sand is filled between the turf member and the reinforcing material, which is exposed at the upper part of the bonding layer in the artificial turf structure.

The fibrous member used in the present invention is a synthetic resin,
For example, polypropylene, nylon, polyester,
It is manufactured using a flat yarn made of vinylidene chloride, polyamide, etc., a monofilament yarn, or a fiber obtained by mixing them. This monofilament thread generally has 5
It is from 00 to 3000 denier, preferably from 1000 to 2000 denier. A bundle of fibrous members means a fibrous member.
5 to 10 pieces are formed by bundling and twisting.
The lawn member is a band in which the bundle of fibrous members is linearly arranged as shown in FIG.

The tie layer of the present invention is made of a curable polymer compound such as rubber or plastic, or a sediment binder made of inorganic particles and polymer latex, or a sediment binder made of inorganic particles, organic particles and polymer latex. Configure. In the present invention, the artificial turf structure that is filled with sand between the turf member and the reinforcing material, which appears at the top of the bonding layer,
It is preferable to use a curable polymer compound in order to strongly fix the grass member and the reinforcing material with a relatively thin layer, while it is preferable to use a clay-sand mixture when the sand is not filled.

Here, as the inorganic particles, sand, glass particles,
Talc, calcium carbonate, clay, etc. may be mentioned, of which the preferred inorganic particles may be sand, calcium carbonate or talc. Examples of sand include sea sand, mountain sand, river sand, and crushed stone. The color of the sand and the size of the particles can be appropriately selected according to the application, but in the tea ground, river sand or mountain sand that gives a gray color is usually used. The particle size of the inorganic particles is generally 0.05 to 3.5 mm, preferably
0.1 to 2.5 mm.

Generally, the smaller the particle size of the inorganic particles, the narrower the particle gap, the smaller the amount of the polymer entering, and the higher the hardness of the bonding layer. On the other hand, when the particle size is large, the amount of polymer entering between the particles is large and an artificial grass structure having high elasticity can be obtained. Examples of the organic particles include non-expanded particles or expanded particles of elastomer such as butadiene rubber, butyl rubber, ethylene propylene rubber, nitrile rubber, natural rubber, urethane rubber, synthetic natural rubber, and styrene-butadiene rubber. Its apparent specific gravity is generally 0.2-0.8,
It is preferably 0.5 to 0.7. The particle size of the organic particles is generally 0.5 to 5.0 mm, preferably 2.0 to 4.0 mm.

In the present invention, natural rubber, synthetic rubber and derivatives thereof are generally used as the polymer used for preparing the polymer latex. For example, there are pre-vulcanized or post-vulcanized natural rubber (sulfur-based, organic peroxide-based, etc.), natural rubber graft-polymerized with methyl methacrylate, depolymerized natural rubber, and synthetic rubber-based rubber includes styrene-butadiene rubber ( S
BR), carboxylated styrene-butadiene rubber (X
-SBR), chloroprene (CR), acrylonitrile-butadiene rubber (NBS) may be mentioned. Further, an acrylic polymer having elasticity, polyurethane rubber or the like can also be used. Moreover, these polymers can also be used in combination.

The polymer concentration of the polymer latex is generally 5 to 70% by weight. When the concentration is less than 5% by weight, the handling is easy, but the strength of the sediment-bonded body is reduced, which is not preferable. On the other hand, when the concentration is higher than 70% by weight, the polymer forms a film as soon as it is mixed with earth and sand, which makes it difficult to handle. In the case of forming a cinder of sand and sand, and when using inorganic particles and a polymer, they are mixed so as to have a weight ratio of 90:10 to 75:25. When inorganic particles, organic particles and a polymer are used, they are mixed in a weight ratio of 50:30:20 to 75:15:10.

In the present invention, instead of the polymer latex, a precursor of a non-foamed polyurethane resin, for example, a precursor composed of polyisocyanate and a polyol and components of a non-aqueous crosslinking agent optionally added, or an isocyanate at the end. A precursor consisting of a urethane prepolymer having a group, a polyol and each component of a non-aqueous crosslinking agent added as necessary, or a urethane prepolymer having a hydroxyl group at the terminal and a polyisocyanate and a non-aqueous crosslinking agent added as necessary. A precursor composed of each component can be used. When a non-aqueous crosslinking agent is used in combination, the strength or hardness of the obtained artificial grass structure can be adjusted by the type and addition amount of the crosslinking agent. The mixing ratio of the inorganic particles and the organic particles is 50:50 to 80:20 by weight,
The mixture ratio of these mixtures and the precursor of the non-foamed polyurethane resin is 90:10 to 70:30 by weight.

The reinforcing material used in the present invention includes a reinforcing liner and a reinforcing cord material. The reinforcing liner is a plate-like reinforcing material as shown in Fig. 5, and its thickness is 1.0 to 3.0 m.
m, preferably 1.2 to 1.8 mm, particularly preferably 1.5 mm, and its width (height) is 25 to 35 mm, preferably 25 to 3 mm.
0 mm. The material of the reinforcing liner is synthetic rubber,
A core-containing sheet made of polyurethane resin, vinyl chloride, nylon, polyester, polypropylene multi-filament thread, or a synthetic rubber or polyurethane resin material, for example, a synthetic rubber plate made by Samsung Belts Co., Ltd. (Product name: three-star resin belt), polyurethane resin sheet, and belt material for transportation by Nitta Belt Co., Ltd. (product name: Nitta belt).
Further, the reinforcing cord material is a rope-shaped reinforcing material, for example, a braid made of synthetic fibers such as nylon and polyester yarn having a diameter of 5 to 12 mm, preferably 6 to 8 mm (gold-strength rope), Or diameter 3-8 mm, preferably 3-6
mm cord having a metal core surface-coated with a polymer such as vinyl chloride (for example, a cord for electric wires).

As shown in FIGS. 1 and 2, the reinforcing liner is fixed such that the side surface of the grass member and the side surface of the reinforcing liner are parallel to each other between the grass members. At this time, the uppermost part of the reinforcing liner does not protrude from the surface of the bonding layer or projects 2.0 to 3.0 mm from the surface of the bonding layer. When sand is filled between the turf member and the reinforcing material protruding on the upper part of the bonding layer, the length of the turf member protruding on the upper part of the bonding layer is 30 to 35 mm, The length of the reinforcing material protruding is 20 to 25 mm. In addition, the sand is removed from the surface of the bonding layer.
Use to form layers 20 to 25 mm thick.

As shown in FIG. 3 (a), the reinforcing cords are fixed by dividing them into appropriate lengths as required, adhering with an adhesive, attaching and nailing, or a combination thereof. However, it is preferable to embed both ends of the reinforcing cord material as shown in FIG.
The fixing member used in the present invention refers to a member for fixing the root portion of the turf member, and the shape thereof is not particularly limited, but is, for example, a rod shape, a lattice shape, a rectangular plate shape, or the like. The method of fixing the root part of the turf member with the fixing member includes a method of folding the turf member with a rod-shaped fixing member as shown in FIG. 6 and binding the root part, and a notch as shown in FIG. There is a method of fixing the grass member in a U-shape to the fixing member having a rectangular plate shape. The fixing member used in the present invention is described in detail in Japanese Patent Application Laid-Open No. 3-28404 cited as a prior art.

The width and length of the artificial turf structure of the present invention need not be limited, but in general, the width is 25 cm to 50 cm.
The standard length is 50 cm or more and about 100 cm, and such blocks are laid and used. A turf member containing a bundle of fibrous members is fixed with a bonding layer, and the production of the artificial turf structure of the present invention in which a liner reinforcing material is provided between the turf member and the turf member is manufactured at regular intervals in the formwork. It is performed by arranging the turf members and rapidly mixing a predetermined amount of the inorganic particles, the organic particles and the polymer latex, or filling the mold with mixing and curing.

[0020]

Industrial Applicability According to the present invention, the durability of the artificial turf structure is significantly improved, and an artificial turf structure having a long service life, which is particularly suitable for use in a golf course, a driving range, etc., can be obtained. It was When the artificial turf structure of the present invention was intensively struck with a golf iron, the surface of the bonding layer was not only slightly broken and the structure was not weakened even after exceeding 50,000 times. The turf members themselves were not much worn.

[0021]

The present invention will be described in detail with reference to the following examples. [Example 1] Six pieces of polyamide monofilament yarn (1300 denier) manufactured by Diatex Co., Ltd.
Five pieces that were twisted as a set were bundled, the bundles were arranged in a straight line, and bundled with a twisted yarn to obtain a grass member. A plurality of the grass members were arranged in the mold frame at intervals of 30 mm, and a reinforcing liner made of Shinko narrow fabric having a thickness of 2.0 mm and a height of 30 mm was placed between the grass members and the grass member. Next, as a polymer, vulcanized natural rubber was suspended in water so as to be 55% by weight, and the polymer latex was 15.5 parts by weight, and the particle size was 0.1 to 1.
5 mm, 67.5 parts by weight of gray sand, and grain size 2.0-4.0
mm, mixed 17.0 parts by weight of non-expanded butadiene rubber particles,
The mixture was agitated to produce a mixed liquid which became a cinder. This mixed solution was poured into the mold and dried with hot air to obtain an artificial grass structure. This artificial grass structure has a thickness of 50 m
The m, width was 30 cm, and length was 90 cm. The turf member was 20 mm and the reinforcing liner was 2 mm from the surface of the bonding layer.

This artificial turf structure was evaluated by the following items: (a) stability and feel such as being appropriately deformed when a person walks and standing, (b) ease of piercing and stability of tee. , (C) Condition after hitting 50,000 times with iron, condition of bonding layer surface, condition of planted artificial grass.
The results of evaluating these are shown in Table 1. [Example 2] Using the same grass member and reinforcing liner as in Example 1, an artificial grass structure was manufactured as follows. A plurality of turf members were arranged in the frame at intervals of 30 mm, and a reinforcing liner was placed between the turf members. Next, a polyurethane resin was mixed, stirred, poured into the mold, and allowed to stand for 4 hours to obtain an artificial grass structure. This artificial grass structure has a thickness of 15 mm, a width of 500 cm and a length of 500.
The turf member was 30 mm from the surface of the bonding layer and the reinforcing liner was 25 mm. On the surface of this artificial grass structure, sand with a particle size of 0.1 to 2.5 mm was placed in a 25 mm layer.

This artificial grass structure was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1. Comparative Example 1 Example 1 except that no reinforcing liner was used
An artificial turf structure was manufactured by the same method and material as above. This artificial grass structure was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1. [Comparative Example 2] Example 2 except that no reinforcing liner was used.
An artificial turf structure was manufactured by the same method and material as above. This artificial grass structure was evaluated in the same manner as in Example 1. The evaluation results are shown in Table 1.

[0024]

[Table 1] Table 1 ──────────────────────────────── Evaluation items (a) (b) (c) ( C) ──────────────────────────────── Example 1 ○ ○ ○ ○ △ Example 2 △ ○ ○ ○ △ Comparative example 1 ○ ○ △ × Comparative Example 2 △ ○ ○ × × Evaluation ○ Good △ Somewhat Good × Poor * Specific state after the evaluation experiment Example 1 The surface of the bonding layer was hardly broken, and the grass member was not lifted.

Also, the abrasion of the grass member on the bonding layer was small. From this result, it was found that the impact of the iron was well absorbed by the reinforcing liner. Example 2 The surface of the bonding layer was hardly broken, and the grass member was not lifted. Also, the abrasion of the grass member on the bonding layer was small. Comparative Example 1 The surface of the bonding layer was gradually destroyed by the impact of an iron. After smashing 50,000 times with an iron, the bonding layer became weak and the grass member floated. Comparative Example 2 The surface of the bonding layer was gradually destroyed by the impact of an iron. After smashing 50,000 times with an iron, the bonding layer became weak and the grass member floated.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view of an artificial turf structure of the present invention in which a turf member including a bundle of fibrous members is fixed by a bonding layer, and a reinforcing material is provided between the turf members.

FIG. 2 is a partial cross-sectional perspective view of an artificial turf structure of the present invention, which is exposed at the upper part of the bonding layer and is filled with sand between the turf member and the reinforcing material.

FIG. 3 is a diagram showing an artificial turf structure of the present invention using a reinforcing cord material, including (a) a plan view seen from directly above, and (b) a reinforcing cord material which is embedded by embedding both ends. It is sectional drawing which shows the fixed state, and (c) The sectional view cut | disconnected by the surface which intersects at right angles with the cord material for reinforcement.

FIG. 4 is a side view showing an example of a grass member used in the present invention.

FIG. 5 is a side view showing an example of a reinforcing liner used in the present invention.

FIG. 6 is an elevational view showing a state in which a lawn member is fixed using a rod-shaped fixing member.

FIG. 7 is an elevational view showing a state where a lawn member is fixed using a rectangular plate-shaped fixing member.

Claims (6)

(57) [Claims] 1. An artificial turf structure in which a turf member including a bundle of fibrous members is fixed in parallel in a plurality of rows at predetermined intervals by a bonding layer, and the turf member is provided between the turf member and the turf member. An artificial turf structure characterized in that a reinforcing material is provided in parallel with. 2. The artificial turf structure according to claim 1, wherein the binding layer is a clay-sand mixture formed of polymer latex, inorganic particles and / or organic particles. 3. The artificial turf structure according to claim 1, wherein sand is filled between the reinforcing member and the turf member projecting above the bonding layer. 4. A turf member including a bundle of fibrous members is fixed by a fixing member, and the turf member and the fixing member are bonded by a bonding layer.
An artificial turf structure in which a plurality of rows are fixed in parallel at predetermined intervals, wherein a reinforcing member is provided between the turf member and the turf member in parallel with the turf member. 5. The artificial turf structure according to claim 4, wherein the binding layer is a clay-sand mixture formed from polymer latex, inorganic particles and / or organic particles. 6. The artificial turf structure according to claim 4, wherein sand is filled between the reinforcing member and the turf member protruding above the bonding layer.