JPH08128008A - Synthetic resin made artificial lawn - Google Patents

Abstract

PURPOSE: To obtain an external appearance like natural lawn and eliminate the fear of filled sand or the like being blown up by wind, walking, or the like. CONSTITUTION: A plurality of synthetic resin made band-like base body parts 1, 1,... are arranged in parallel to each other with intervals and a plurality of synthetic resin made leaf-like parts 2, 2,... are arranged in the longitudinal direction of the base body parts 1, 1,... with intervals. Respective leaf-like parts 2, 2,... are composed of a plurality of curved leaf pieces 22, 22,..., and are integratedly formed with adjoining base body parts 1. The leaf-like part 2 contains a leaf piece 22 having two or more curved parts 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin artificial turf, and more specifically, a plurality of synthetic resin belt-like base portions are arranged in parallel at intervals, and a plurality of base portions are provided between the base portions. The synthetic resin leaf-shaped parts are arranged at intervals in the longitudinal direction of the base part, and each leaf-shaped part is composed of a plurality of bent leaf pieces and is integrally formed with the adjacent base part. Regarding artificial turf made.

[0002]

2. Description of the Related Art Conventionally, as described in JP-B-48-44721, a plurality of synthetic resin belt-like base portions are arranged in parallel at intervals, and a plurality of base portions are provided between these base portions. The synthetic resin leaf-shaped parts are arranged at intervals in the longitudinal direction of the base part, and each leaf-shaped part is composed of a plurality of bent leaf pieces and is integrally formed with the adjacent base part. Artificial turf made is known. Such synthetic resin artificial turf is used for rugs such as balconies and roofs of general houses, hotels, department stores, etc., and is recently laid in tennis, baseball, gateball and other stadiums and practice fields.

In addition, when it is used in a walking path of a golf course or the like, artificial grass is provided with a filler such as sand in order to improve the walking feeling more like natural grass and the breakage resistance of leaf-like parts by spike shoes. So-called artificial sand containing sand is popular.

In such synthetic resin artificial grass,
In order to give the appearance of natural grass, the above Japanese Patent Publication No. 48-4
As described in Japanese Patent No. 4721, by bending a leaf portion using a heated pressure roll, each leaf portion is composed of a plurality of bent leaf pieces, and the bent portion of each leaf piece is described. Is provided at or near the root of each leaf piece.

[0005]

However, in the conventional synthetic resin artificial turf, it is difficult to obtain the appearance of natural turf if the bending angle of each leaf piece of the leaf portion is insufficient. Also, the bent portion of each leaf piece is the root of each leaf piece,
Or, if it is installed in the vicinity of it, like a so-called artificial turf with sand, when it is filled with a filler such as sand, the bent portion of each leaf piece is buried by the filler such as sand, so that it looks like natural grass. Not only is it difficult to obtain a unique appearance, but there is also the drawback that the filled sand, etc., easily floats up due to wind, walking, etc.

The present invention has been made as a result of earnest research focusing on such problems in the conventional synthetic resin artificial turf. The object of the present invention is to solve the problems in the conventional synthetic resin artificial turf. An object of the present invention is to provide an artificial turf made of synthetic resin, which solves the problem and gives an appearance like that of natural turf, and in which the filled sand or the like is not likely to fly up by the wind or walking.

[0007]

In order to achieve the above object, the synthetic resin artificial turf according to the first aspect of the present invention comprises a plurality of synthetic resin belt-shaped base portions arranged in parallel at intervals. Between these base parts, a plurality of synthetic resin leaf-shaped parts are arranged at intervals in the longitudinal direction of the base part, and each leaf-shaped part is composed of a plurality of bent leaf pieces. In the synthetic resin artificial grass integrally formed with,
The leaf-shaped portion is characterized by including a leaf piece having two or more bent portions.

In the synthetic resin artificial turf according to a second aspect of the present invention, a plurality of synthetic resin belt-shaped base portions are arranged in parallel with a space therebetween, and a plurality of synthetic base materials are provided between the base portions. Synthetic resin artificial leaves in which resin leaf-shaped parts are arranged at intervals in the longitudinal direction of the base part, and each leaf-shaped part is composed of a plurality of bent leaf pieces and is integrally formed with an adjacent base part. In the lawn, the bent portion of each leaf piece of each leaf-shaped portion is provided on the tip side of each leaf piece.

In the present invention as set forth in claims 1 and 2, the synthetic resin constituting the base portion and the leaf portion is not particularly limited, but for example, low density polyethylene, medium density polyethylene, high density polyethylene, Olefins such as linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-vinyl acetate copolymer, vinyl chloride resin, vinylidene chloride resin, vinyl chloride-acetic acid Vinyl chloride resin such as vinyl copolymer, styrene resin such as polystyrene, amide resin such as nylon 6, nylon 6.6 and nylon 6.10, polyester such as polyethylene terephthalate and polybutylene terephthalate, and other synthesis Resin can be used. These synthetic resins may be used alone or in combination of two or more kinds, but an olefin resin is preferable from the viewpoint of moldability and economy.

It is preferable that the synthetic resin for the base portion and the synthetic resin for the leaf portion are the same kind of synthetic resin, but different kinds of synthetic resins may be combined as long as they are compatible with each other. Further, if necessary, a pigment for coloring, an antioxidant for imparting climate resistance, a light stabilizer, a lubricant which is a processing aid, and the like may be added.

The synthetic resin artificial turf according to the first and second aspects of the present invention may be formed one by one in a batch type such as injection molding, but long ones are continuously formed. But,
Economically advantageous.

In the present invention according to claims 1 and 2,
Each leaf piece of each leaf-shaped portion may be bent by post-processing, and the post-processing means may be a means that pressurizes with a pressure roll or the like. In this way, when pressure-deforming with a pressure roll or the like, it is preferable to perform it while accurately controlling the temperature distribution of the leaf-shaped portion, and a step of heating the leaf-shaped portion before the pressure-deformation is provided and further cooled However, it is preferable to perform a post-processing by providing a step of deforming under pressure.

According to the invention of claim 1, the leaf piece 2
It is preferable that the bent portions provided at more than one place are dispersed in the entire height direction of the leaf piece. In the invention according to claim 2, when filling a filling material such as sand, the filling is performed at least half the height from the root of the leaf-shaped portion, and the tip of the leaf piece projects at least 5 mm or more from the filling material. Is preferred.

In the first and second aspects of the present invention, the bending direction of the leaf pieces is two-dimensional or three-dimensional, and when viewed from above, a plurality of leaf pieces have a three-dimensional structure in which they are bent in all directions as a whole. That is preferable. With such a structure, it is possible to prevent stress from being concentrated on the roots of the leaf pieces, increase the entanglement of the leaf pieces, and to face the load from above.

[0015]

In the artificial grass made of synthetic resin according to the first aspect of the present invention, since the leaf-shaped portion includes leaf pieces having two or more bent portions, the leaf-shaped portion has not only a natural grass-like appearance but also an upper portion. The resistance to the load from is improved, the impact resistance and the cushioning property are not impaired even after long-term use, and the durability performance such as the settling resistance is good.

In the artificial grass made of synthetic resin according to the second aspect of the present invention, since the bent portion of each leaf piece of each leaf-shaped portion is provided on the tip side of each leaf piece, when filled with a filler such as sand. Can increase the length and bending angle of the leaf pieces protruding from the surface of the filling material to obtain the appearance of natural grass, and can suppress the rising of the filling material due to wind or walking.

[0017]

Embodiments of the present invention will now be described with reference to the drawings. [Example 1: Example of the invention according to claim 1] Fig. 1 is a perspective view showing an example of the synthetic resin artificial turf of the present invention. In FIG. 1, A is a synthetic resin artificial turf of the present invention, 1, 1, ...
Are arranged in parallel at regular intervals. 2, 2,
.. are leaf-shaped portions, a large number of which are arranged between the base portions 1 and 1 which are adjacent to each other at regular intervals.
.. is formed integrally with the base portion 1.

Each leaf-shaped portion 2, 2, ... Is a plurality of leaf pieces 2.
2, 22, ..., and a plurality of leaf pieces 22, 22 ,.
-At least one of the leaf pieces 22 has two or more bending portions 23 and is bent in a substantially Z shape. The base portion 1 and the leaf-shaped portion 2 are both made of a material obtained by dry-blending the following compounded resin. Low-density polyethylene (Mitsui Petrochemical Co., Ltd. "Mirason 403P" MFG: 7 g / 10 minutes, density: 0.92 g /
cm ³ ) ... 100 parts by weight Hindered phenolic antioxidant as a processing stabilizer (“IRGANOX1010” manufactured by Ciba-Geigy)
.. 0.2 parts by weight As a light stabilizer, a hindered amine-based ultraviolet absorber (“CHIMASSORB 944” manufactured by Ciba Geigy) ..
0.5 parts by weight

[Operation of Example 1] Table 1 shows the height of the leaf-shaped portion 2, the distribution of the number of the bent portions 23, and the sag resistance as the performance. As for the height of the leaf-shaped portion 2, the height from above the base portion 1 before bending the leaf piece 22 is unified to about 26 mm, and the height from above the base portion 1 after bending the leaf piece 22. About 2
Unified to about 2 mm. Regarding the distribution of the number of bent portions 23, 80 leaf pieces 22 of 10 leaf-shaped portions 2 out of the sample of 25 leaf-shaped portions 2 used in the performance test were randomly selected and two or more bent portions 23 were provided. The number of leaf pieces 22 possessed was counted.

The drag force during compression deformation is 0.8 kg / cm ³
The amount of deformation of the leaf-shaped portion 2 under a compressive load is shown. The sag resistance was measured by measuring the rate of change in the height of the leaf-shaped portion 2 after leaving it at room temperature for 24 hours after the compression fatigue test with respect to the height of the leaf-shaped portion 2 after pressure deformation. The test conditions of the compression fatigue test are as follows. Load: 0.8kg / cm ³ Test speed: 0.5Hz Fatigue limit: 1000 times

[0021]

[Table 1]

In the artificial grass of the present invention shown in FIG.
As shown in, the compression resistance is superior to that of Comparative Example 2.

The production of the artificial turf of the present invention shown in FIG.
It can be manufactured using the apparatus described in JP-A-26005. That is, FIG. 2 is a schematic explanatory view showing an example of an apparatus for manufacturing the artificial grass of the present invention shown in FIG.

In FIG. 2, reference numeral 31 is an extrusion head provided at the tip of an extruder (not shown), and the synthetic resin material extruded from the extrusion head 31 is supplied to a molding drum 32 provided in front of the extrusion head 31 to be molded. On the outer peripheral surface of the drum 32, as the molding drum 32 rotates, it is molded into an artificial grass a as shown in FIG. As shown in FIG. 3, this artificial turf-shaped object a has a plurality of leaf-shaped portions 2, 2, between base portions 1, 1, ...
.. is provided, and the leaf piece 22 of the leaf-shaped portion 2 is straight.

Then, through the dancing roll 34,
The leaf piece 22 is bent by being heated by the infrared radiator 35 (capacity 3 kw / piece) and passing between the base 36 and the elevating press 37, and the leaf piece 22 is formed with two or more bent portions 23. It is like this. still,
The elevating press 37 is activated by a hydraulic cylinder, and the clearance at pressurization, the press speed, the press pressure, the press time, and the number of presses can be freely controlled.

In order to form the bent portion 23 at two or more places on the leaf piece 22, the output of the infrared radiator 35 on the lower side is increased, and the temperature of the root portion 21 of the leaf portion 2 becomes higher than that of the tip portion of the leaf piece 22. So that the leaf piece 22 is bent from the root.

Thereafter, the artificial turf A thus molded is taken up by the take-up machine 36.
And is wound by the winder 37.

[Embodiment 2: Embodiment of the invention described in claim 2] FIG. 4 is a sectional view showing another example of the synthetic resin artificial grass of the present invention. In the synthetic resin artificial turf B of the present invention shown in FIG. 4, the strip-shaped base portions 1, which are provided in parallel at intervals,
The leaf portions 2, 2, ... Are provided at intervals between the leaf portions 1, ..., The bent portion 23 is provided on the tip side of the leaf piece 22 of each leaf portion 2, and the sand 4 is provided at the level of the bent portion 23. It is filled.
The materials of the base portion 1 and the leaf-shaped portion 2 are the same as those of the first embodiment. Sand 4 is silica sand No. 3 (“F-4 manufactured by Miku Shipping Co., Ltd.
No. ”) was used, and the sand 4 was filled with 25 kg / m ³ so that the leaf-shaped portions 2 were projected on the sand 4 by 5 mm or more. Bend 23
Exists around 15 to 18 mm from the base portion 1, and sand 4
The length of the leaf piece 22 protruding from is about 5 to 8 mm. The synthetic resin artificial grass of the present invention shown in FIG. 4 can also be manufactured by the same manufacturing apparatus as that of the synthetic resin artificial grass of the present invention shown in FIG.

[Comparative Example 2] In Comparative Example 2, the bent portions were randomly distributed from the root to the tip of the leaf pieces, and when sand was filled, most of the bent portions were buried in the sand layer, The length of the protruding leaf pieces was about 5 to 8 mm.

[Operation of Embodiment 2] In the artificial turf of the present invention shown in FIG. 4, the length of the leaf piece 22 protruding on the surface of the sand 4 is larger than that of the comparative example 2, and the inclination angle of the leaf piece 22 is large. Since it is also large, the leaf pieces 22 of the leaf-shaped portion 2 are configured to hold down the sand 4, and the rising of the sand 4 due to wind or walking can be prevented.

Although the embodiments of the present invention have been described above with reference to the drawings, the configuration of the present invention is not limited to the illustrated embodiments, and design changes within the scope of the present invention are included in the present invention. Be done. For example, in Example 1 shown in FIG. 1, the leaf pieces 22 are bent in a substantially Z-shape bent in opposite directions, but the bent portions 23 are provided in three or more places and bent in a zigzag shape. But it's okay.

[0032]

In the synthetic resin artificial turf according to the first aspect of the present invention, the leaf-shaped portion includes leaf pieces having two or more bent portions, so that not only does it have a natural grass-like appearance. The resistance against a load from above is improved, the impact resistance and the cushioning property are not impaired even after long-term use, and the durability performance such as the settling resistance is good.

In the synthetic resin artificial turf according to the second aspect of the present invention, since the bent portion of each leaf piece of each leaf-shaped portion is provided on the tip side of each leaf piece, when filled with a filler such as sand. Can increase the length and bending angle of the leaf pieces protruding from the surface of the filling material to obtain the appearance of natural grass, and can suppress the rising of the filling material due to wind or walking.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an artificial grass of the present invention.

2 is a schematic explanatory view showing an example of an apparatus for manufacturing the artificial grass of the present invention shown in FIG.

FIG. 3 is a perspective view showing a material of the artificial grass of the present invention shown in FIG.

FIG. 4 is a perspective view showing another example of the artificial turf of the present invention.

[Explanation of symbols]

 A, B Inventive artificial grass 1 Base part 2 Leaf-shaped part 21 Root 22 Leaf piece 23 Bent part

Claims (2)

[Claims] 1. A plurality of synthetic resin strip-shaped base portions are arranged in parallel at intervals, and a plurality of synthetic resin leaf-shaped portions are arranged between these base portions in the longitudinal direction of the base portion. In a synthetic resin artificial turf, which is arranged apart from each other, each leaf-shaped portion is composed of a plurality of bent leaf pieces, and is integrally formed with an adjacent base portion, the leaf-shaped portion has two or more bent portions. An artificial turf made of synthetic resin, characterized in that it contains leaf pieces. 2. A plurality of synthetic resin strip-shaped base portions are arranged in parallel at intervals, and a plurality of synthetic resin leaf-shaped portions are arranged between these base portions in the longitudinal direction of the base portion. In a synthetic resin artificial turf, which is arranged apart from each other, each leaf-shaped portion is composed of a plurality of bent leaf pieces, and is integrally formed with an adjacent base portion, the bent portion of each leaf piece of each leaf-shaped portion is An artificial grass made of synthetic resin, which is provided on the tip side of the leaf piece.