JPH08134822A - Artificial lawn made of synthetic resin and manufacture thereof - Google Patents

Abstract

PURPOSE: To impart sliding properties and the rolling properties of a ball by disposing leaf-like sections inclined in the fixed direction among beltlike base body sections arranged at intervals in parallel mutually and made of a synthetic resin at intervals in the longitudinal direction of the base body sections. CONSTITUTION: A plurality of beltlike base body sections 1 made of a synthetic resin are disposed at regular intervals in parallel mutually. Leaf-like sections 2 consisting of a plurality of leaf pieces 22 inclined in the fixed directions and bent in intermediate sections are formed. The leaf-like sections 2 are arranged among the adjacent base body sections 1 while the roots 21 of the leaf-like sections 2 are formed integrally with the base body sections 1, thus forming artificial lawns A made of the synthetic resin. Accordingly, sliding properties and the rolling properties of balls required as application can be imparted, and natural lawn-shaped appearance can be given.

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 a method for producing the same, and more specifically, a plurality of synthetic resin strip-shaped base portions are arranged in parallel at intervals. A plurality of synthetic resin leaf-shaped portions are arranged at intervals in the longitudinal direction of the base portion, and each leaf-shaped portion is composed of a plurality of bent leaf pieces and is integrally formed with an adjacent base portion. The present invention relates to a synthetic resin artificial grass and a method for manufacturing the same.

[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 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, the leaf portions are unevenly dispersed by bending the leaf portions using a heated pressure roll.

Further, as described in, for example, Japanese Utility Model Laid-Open No. 58-101680, leaf-shaped portions are inclined in a certain direction as artificial grass for laying on slopes of artificial ski resorts, slopes of walking paths, etc. Artificial grass is known.

[0005]

However, in the synthetic resin artificial turf described in the former Japanese Patent Publication No. 48-44721, if the bending angle of each leaf piece of the leaf-shaped portion is insufficient, It is difficult to obtain a natural grass-like appearance. Further, in the latter artificial turf described in Japanese Utility Model Laid-Open No. 58-101680, there is no bent portion in the leaf portion, and the leaf portion is simply inclined.
The appearance was far from natural grass.

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. A synthetic resin artificial turf that solves the problems and gives a natural grass-like appearance and has a certain directionality, and a method of manufacturing a synthetic resin artificial turf that can relatively easily impart orientation to leaf-shaped parts are provided. There is.

[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,
It is characterized in that each leaf portion is inclined in a certain direction.

According to a second aspect of the present invention, there is provided a synthetic resin artificial turf manufacturing method in which a plurality of synthetic resin belt-shaped base portions are arranged in parallel with each other at intervals. A process for heating synthetic resin artificial grass material in which individual synthetic resin leaf-shaped portions are arranged at intervals in the longitudinal direction of the base portion, and each leaf-shaped portion is integrally formed with the adjacent base portion. ,
It consists of a step of tilting each heated leaf portion in a certain direction, a step of bending the leaf pieces of each heated leaf portion, and a step of cooling the material of the synthetic resin artificial turf thus formed. It is characterized by.

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 weather resistance, a light stabilizer, a lubricant as a processing aid, and the like may be added.

The synthetic resin artificial turf according to the first aspect of the present invention may be formed one by one in a batch type such as injection molding, but a long one is continuously formed. Economically advantageous. Further, in the present invention according to claims 1 and 2, the inclination angle for inclining each leaf portion in a certain direction is such that the sliding property and the rolling property of the ball required for the application are
Alternatively, it is appropriately selected depending on the inclination angle of the place to be laid, but it is preferably about 50 to 85 ° with respect to the base portion. When the inclination angle exceeds 85 °, the effect is not much different from the viewpoint of performance and appearance as compared with the case where the leaf portions are erected vertically. Further, when the inclination angle is less than 50 °, each leaf-shaped portion becomes bent, and it becomes difficult to bend the leaf piece of the leaf-shaped portion, and the appearance is also unfavorable.

[0012]

In the synthetic resin artificial turf according to the first aspect of the present invention, since each leaf-shaped portion is inclined in a certain direction, it is possible to impart the sliding property and the rolling property of the ball required for the application. It is possible, and it is possible to give a natural grass-like appearance by bending the leaf pieces.

In the method for producing the synthetic resin artificial turf according to the second aspect of the present invention, the step of heating the material of the synthetic resin artificial turf, the step of tilting each heated leaf portion in a certain direction, and the heating The artificial turf according to claim 1 can be easily obtained because it comprises a step of bending the leaf pieces of each leaf-shaped portion and a step of cooling the material of the synthetic resin artificial turf thus molded. it can.

[0014]

Embodiments of the present invention will now be described with reference to the drawings. [Embodiment of the invention according to claim 1] Fig. 1 is a perspective view showing an example of the synthetic resin artificial grass of the present invention, and Fig. 2 is an enlarged view of a part of the synthetic resin artificial grass of the present invention shown in Fig. 1. FIG.
1 and 2, A is an artificial grass made of the synthetic resin of the present invention, 1,
.. are strip-shaped base portions of the artificial turf A, and the strip-shaped base portions 1, 1, ... Are arranged in parallel at regular intervals. .. are leaf-shaped portions, a large number of which are arranged between the base portions 1 and 1 adjacent to each other at regular intervals, and the roots 21 of the leaf-shaped portions 2, 2, ... It is formed integrally with the part 1.

Each leaf-shaped portion 2, 2, ... Is a plurality of leaf pieces 2
2, 22, ..., and a plurality of leaf pieces 22, 22 ,.
-Is inclined in a certain direction and is bent in the middle. Both the base portion 1 and the leaf portion 2 are made of a material obtained by dry blending the following compounded resin. Low density polyethylene (“Mirason 403P” manufactured by Mitsui Petrochemical Co., Ltd. MFR: 7 g / 10 minutes, density: 0.92 g / cm ³ ) ... 100 parts by weight Hindered phenolic antioxidant as a processing stabilizer (Ciba Geigy "IRGANOX 1010") ... 0.2 parts by weight As a light stabilizer, a hindered amine UV absorber ("CHIMASSORB 944" manufactured by Ciba-Geigy) ... 0.5 parts by weight

[Embodiment of the Invention According to Claim 2] Next, an embodiment of the method for producing the synthetic resin artificial grass of the present invention will be described with reference to FIG. In FIG. 3, 3 is a mold provided at the tip of an extruder (not shown), 4 is a molding drum provided adjacent to the mold 3, and a molding drum 4 is provided from a nozzle of the mold 3.
As shown in FIG. 4, a cavity is formed between the mold 3 and the molding drum 4 by supplying synthetic resin on the outer surface of the
The synthetic resin artificial grass material B is molded and sent to the rear by the rotation of the molding drum 4.

In the synthetic resin artificial turf material B shown in FIG. 4, a plurality of synthetic resin strip-shaped base portions 1, 1, ... Are arranged in parallel at intervals and these base portions 1, 1 ,. A plurality of synthetic resin leaf-shaped portions 2, 2, ... Are arranged at intervals in the longitudinal direction of the base portion 1, and each leaf-shaped portion 2, 2 ,.
21 is formed integrally with the adjacent base portion 1,
Each leaf-shaped portion 2, 2, ... Leaf piece 22 is erected straight. The synthetic resin artificial turf material B sent backward from the molding drum 4 is supplied to a heating device 6 composed of an infrared radiator (capacity 3 kw / piece) via a dancing roll 5 to heat the upper and lower surfaces thereof.

Next, by feeding the heated material B to the drive roll 7, the leaf-shaped portions 2 of the material B are
Inclining 2 ... Further, the material B is fed between the lifting press 81 and the cradle 82, and the lifting press 8
1 is bent to move the leaf-shaped portions 2, 2, ... Leaf pieces 22 to form the synthetic resin artificial turf A shown in FIG. 1 and then sent backward to be air-cooled and wound via the take-up device 9. The take-up device 10 takes up the film.

The elevating press 81 is driven by a hydraulic cylinder (not shown), and a clearance between the elevating press 81 and the pedestal 82 at the time of pressurization,
It is possible to freely control the press speed, the press pressure, the press time, and the number of presses.

[Evaluation] Drive roll 7 and lifting press 81
Table 1 shows the treatment conditions, the height of the leaf-shaped portion 2 after the treatment, the standing angle of the leaf-shaped portion 2, and the ball rolling property as a performance evaluation. In Table 1, as the clearance of the drive roll 7, the distance from the bottom surface of the base portion 1 of the artificial turf to the contact point of the drive roll 7 is shown. The height of the leaf-shaped portion 2 of the material B is the height from the upper surface of the base portion 1 and is unified to about 26 mm. The height of the leaf-shaped portion 2 after pressure deformation by the drive roll 7 and the elevating press 81 is about 22 in consideration that a sufficient bending angle can be obtained without impairing the appearance like natural grass.
mm.

The rolling property of the ball is determined by the artificial surface for sports (BS7044: 1089Artificia).
i sports Surfaces. ) Ball rolling test method (Section 2.1 Met)
hod 2. Determination of ba
ll Roll) as a reference, rolling the golf ball from a ball rolling base having a height of 1 m and an inclination angle of 45 °,
The rolling distance was measured 5 times each in the forward and reverse directions of the turf, and the average value was shown. In the comparative example, the leaf-shaped portion 2 is vertically deformed under pressure. In the comparative example, the leaf-shaped portion 2 is bent too much because the leaf-shaped portion 2 is excessively inclined although the pressure-deformation process has been performed. In the comparative example, the leaf pieces 22 of the leaf-shaped portion 2 could not be formed.
There is no bent part.

[0022]

[Table 1]

As shown in Table 1, the synthetic resin artificial grass of the present invention shown in FIG. 1 is superior in appearance to the comparative example.

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 the manufacturing method of the present invention,
Although the molded artificial grass was air-cooled, it may be water-cooled.

[0025]

In the synthetic resin artificial turf according to the first aspect of the present invention, since each leaf-shaped portion is inclined in a certain direction, the sliding property and the ball rolling property required for the application are imparted. It is possible to impart a natural grass-like appearance by bending the leaf pieces.

In the method for producing the synthetic resin artificial turf according to the second aspect of the present invention, the step of heating the material of the synthetic resin artificial turf, the step of tilting each heated leaf portion in a certain direction, and the step of heating The artificial turf according to claim 1 can be easily obtained because it comprises a step of bending the leaf pieces of each leaf-shaped portion and a step of cooling the material of the synthetic resin artificial turf thus molded. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of synthetic resin artificial turf of the present invention.

FIG. 2 is an enlarged sectional view showing a part of the synthetic resin artificial grass of the present invention shown in FIG.

FIG. 3 is an explanatory view showing an embodiment of a method for producing an artificial grass made of synthetic resin of the present invention.

FIG. 4 is a perspective view showing a material of synthetic resin artificial turf.

[Explanation of symbols]

 A Synthetic resin artificial grass of the present invention 1 Base part 2 Leaf-like part 21 Root 22 Leaf piece 23 Bending part 3 Mold 4 Molding drum 5 Dancing roll 6 Heating device 7 Drive roll 81 Elevating press 82 Cradle 9 Pulling device 10 Winding device

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, each leaf-shaped portion is inclined in a certain direction. Synthetic resin artificial turf characterized by 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. Each leaf-shaped portion is separated, and each leaf-shaped portion is heated by a step of heating a synthetic resin artificial grass material integrally formed with an adjacent base portion, a step of inclining each heated leaf-shaped portion in a certain direction, and heated. And a step of bending the leaf pieces of each leaf-shaped portion, and a step of cooling the material of the synthetic resin-made artificial turf molded in this way.