JP3384178B2 - Sand molded artificial turf - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded artificial grass containing sand used in golf course paths, parks, playgrounds, sidewalks, multipurpose open spaces and the like.

[0002]

2. Description of the Related Art Recently, golf course paths, parks, playgrounds,
Molded artificial grass containing sand is being used for sidewalks and multipurpose open spaces. However, such molded artificial grass has
The tip had an ordinary tapered shape, and the leaves had a shape in which each leaf was randomly oriented.

[0003]

In such a conventional sand-filled artificial turf, leaves are easily set by running a golf cart on a golf course or walking by a player or a gallery, and the leaves are caught by spike pins of a golf shoe. There is a defect that the filled sand is easily scattered by being torn and torn, and further when hit by a golf ball. In addition, gusts and rainfall caused severe scattering and outflow of sand, and the number of times of new sand filling had to be increased accordingly, and it was the actual situation that it was very difficult to maintain the filling sand.

As described above, golf is now popular, and due to the rapid increase in the frequency of use in public courses, etc., the filled sand flows out and scatters, exposing the roots of the leaves of molded artificial turf and causing further leaf pain. Is in a terrible situation. As a result, the durability of the leaf stalks is significantly reduced, and the phenomenon that the leaves are cut occurs especially at the exposed roots of the foliage.Furthermore, the settling of the filling sand causes the shaped artificial grass itself to rise and the surface to become uneven. In addition to being difficult to shape, some of them even have the problem of significantly impairing aesthetics.

In view of the problem of the conventional artificial sand containing sand, the present invention reduces the friction coefficient and prevents the settling.
In addition to providing molded artificial turf made of leaf stems,
Preventing scattering and outflow of the filling sand, in which the appearance of sand-filled molded synthetic turf and does not provide a sand-filled molded synthetic turf that obtained maintaining good durability.

[0006]

The present invention employs the following means in order to achieve the above-mentioned object.

[0007] Sunawa Chi, sand-filled synthetic turf molding of the present invention,
The leaf stem portion has a three-dimensional structure in which a plurality of leaf stem portions are projected from the base sheet portion , and the base sheet and the leaf stem portion are integrally fused.
A molded artificial turf that is worn and molded , the leaf stem first
Having a molten ball at the end, wherein the leaf stem bundle has a central portion
The stems curl into a swollen shape and gather at the tip
Which has the form, and sand stop sheet is laminated to the substrate sheet back surface of the shaped synthetic grass and sand the leaves stem segment of the molding artificial turf is characterized in that it is filled Is.

[0008]

According to the present invention, the problems associated with the scattering and outflow of sand in a sand-containing molded artificial turf, which is used by filling the molded artificial turf with sand, and the sedimentation of the molded artificial turf, impair the appearance of the environment. As a result, when using the artificial turf in which the stems were gathered in a bundle as the molded artificial turf, and curled so that each leaf of the bundle of stems was gathered at the tip. Then, by further melting the tip portion of the leaf, typically forming a leaf having a molten ball at the tip, it has been clarified that the above problems can be solved all at once.

The molded artificial turf of the present invention is composed of a thermoplastic resin such as polyolefin, EVA or nylon, particularly a polyolefin resin. Such a thermoplastic resin may be used alone, but other resins and additives, for example, a colorant, within a range not impairing the object of the present invention,
You may contain functional processing agents, such as a weathering agent. In particular, a dye or a pigment is used as the colorant, and it is preferable to use a non-heavy metal type colorant as the colorant in view of the harmfulness to the human body. For example, as the non-heavy metal pigment, a metal oxide such as iron oxide or a non-heavy metal organic pigment such as a phthalocyanine pigment is used. Such pigments may be used in the form of mixed pigments. Such pigments are
Unlike dyeing like dyes,
It is used by kneading it into a polymer. Such a pigment is preferably 0.1 to 10 parts by weight, and more preferably 1 to 100 parts by weight of the resin, although it depends on the desired degree of coloring.
It is compounded in the range of 5 parts by weight.

[0010] forming the artificial turf of the present invention may be one which is formed into a block shape. Molding into a block shape uses an ordinary injection molding machine, prepares a molding artificial turf mold with a three-dimensional leaf portion punched, and fills the mold with the resin of the present invention to prepare a molded product. To do. These blocks are fitted and connected by a simple fitting member and laid in a large area. However, if the purpose is to lay it on a large site such as an artificial ski resort,
Preference is given to artificial turf which is preferably continuously molded. Such a manufacturing method is a method proposed in Japanese Examined Patent Publication No. 52-1569, that is, a cylindrical shape for forming artificial turf leaves around the drum, preferably 4 to 10 pieces / cm ² , and further preferably 6-8 pieces / cm ² molds containing core metal with leaf notches are arranged, and the device is provided with a groove for the base material that connects them, and is fused together to form a three-dimensional structure. Molded
(The same publication, column 3, lines 4 to 6) . That is, a thermoplastic resin, for example, a polyolefin resin is extruded into the mold drum, and the mold is filled with the resin to form the leaves of the gap between the cylinder and the core metal. The resin is also filled in the groove of the base material portion, and the leaf portion is connected at the bottom surface. The bottom part becomes a sheet. The filled resin is cooled with the rotation of the drum and is cooled and solidified to form a molded body. This shaped body, or shaped artificial grass, is stripped from the drum and wound up on the side opposite the extruder. This molded artificial grass has a three-dimensional three-dimensional structure in which the leaves are forested on the base sheet.

The present invention, in order to impart the filling sand scattering and outflow-preventing properties to such molding artificial turf, leaves forming artificial turf (leaf and stem
(Also referred to as) is used by melting the tip in a round shape. The method of melting is to locally heat the tip portion of the leaf with a gas flame and melt it to form a molten ball. The thickness of the turf leaf (also referred to as leaf stem ) of the molded artificial turf of the present invention is not particularly limited, but it is preferable that it has a shape that becomes thinner from the root to the tip from the viewpoint of strength, preferably the root portion is 0.5 ~
It is preferable that the end portion is 5 mm and the tip portion is formed in the range of 0.1 to 3 mm for durability. These leaves are formed in a sharp-angled shape with a tapered tip for fashionability. Rounded by melting the sharp edges of the tip portions of the leaves of such molding artificial turf, i.e. is obtained by forming a melt by melting spheres thicker than the thickness of the tip portion. The size of such melt sphere,
Good Mashiku about 5% or more of the leaf tip thickness, even 10
% Or more larger ball (bulk) is formed, it is of a size of up to about times be greater. The molded artificial turf with a fused ball has the function of a roller at the same time, and thus has the advantage of reducing the friction coefficient.

As shown in FIG. 1, the molded artificial turf of the present invention has a bulge at the center of the leaf stem bundle 2 and melts the acute-angled portion of the tip 1 of the leaf stem to make it round. And those having at least one kind selected from among those having a fused ball at the tip of the leaf stem and those having the leaf tips or the fused balls fused to each other. Molded artificial turf of the present invention,
Typically, it is a molded artificial grass in which the leaf stem portion protrudes from the base sheet portion, preferably 10 to 30 mm. Further, those having a bulge in the central portion of the leaf stem bundle are preferable, more preferably the molten balls at the tip of the leaves are substantially spherical, and more preferably 50% or more of the leaf density of the leaf stem portion is the tip of the leaf stem. Those fused at the molten ball portion of are preferable. A sand stopper sheet is laminated on the back surface of the base sheet portion of the molded artificial turf of the present invention, which surely prevents outflow and sedimentation of the filled sand. Such sand control sheet is at least 30 g / m ² , more preferably 50 to 500 g.
/ M ² of cloth-like material such as woven / knitted material and non-woven material (including web and mat). The sand blocking sheet
It is also water permeable in addition to the sand stop function. That is, the molded artificial grass of the present invention is entirely permeable to water. Therefore,
The sand-preventing sheet is not limited to the thickness and the basis weight, and it is preferable that the sand-preventing sheet is determined by having the above-mentioned water permeability.

Among these cloth-like materials, a non-woven cloth-like material reinforced with a mesh sheet is particularly preferably used.
Here, the cloth-like material is preferably one that can withstand hooking and tearing, and can withstand pressing. For example, the cloth-like material is not limited to a synthetic resin, but a metal sheet such as stainless steel, that is, the above-mentioned cloth-like material. Can be used.

[0014]

EXAMPLES The present invention will be described in more detail with reference to examples.

Example 1, Comparative Example 1 A polyethylene resin containing 2 parts by weight of a mixed pigment consisting of phthalocyanine green and iron oxide was used per 100 parts of the resin, and the stem density was 8 fibers / cm ² , and Molded artificial turf that is continuously molded in the length direction, with a leaf stem length of 23 mm
It was made. 100 on the back surface of the base sheet of this molded artificial grass
Nonwoven fabrics of g / m ² were laminated by the point adhesion method. In this molded artificial grass, the tip of the leaf stem was melted by heating to form a molten ball. At that time, the fusion of the molten balls at the tip of the stem was 70% of the leaf stem density.
It was heat fusion-bonded so that it became%. The leaves were buckled using the following press machine to have a bulge in the central part of the leaf stem.

As Comparative Example 1, the same molded artificial turf as that of Example 1 was used, which was made of the same resin as that of Example 1 and had a stem density of 8 stems / cm ² and was continuously molded in the length direction. Formed. However, this molded artificial turf is one in which the tip of the leaf stem is flat and the tip of the leaf is tapered, and the leaves are oriented in a random direction one by one. No lamination or melt processing was applied. Sand was sprayed and filled into each of these molded artificial grasses to form two kinds of sanded molded artificial grasses. These two types of sand-formed artificial turf were impacted 3000 times with a dynamic load fatigue tester equipped with a metal impactor. As a result, in Example 1, the settling of the leaf stem was improved about 8 times as compared with Comparative Example 1, and the scattering, outflow and sedimentation of sand were slight. On the other hand, in Comparative Example 1, a large amount of sand was scattered, a large amount of sand was scattered, and the sand was severely settled, and the molded artificial grass climbed on the sand and floated up.

[Brief description of drawings]

FIG. 1 is a schematic view of a molded artificial grass used for the sand-containing molded artificial grass of the present invention.

[Explanation of symbols]

1: Tip of leaf 2: Leaf stem

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-309152 (JP, A) JP-A-63-63803 (JP, A) Actually open 3-72902 (JP, U) Actually open 4- 37604 (JP, U) Actually open 63-185809 (JP, U) Actually open 6-84815 (JP, U) JP 52-1569 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) E01C 13/08

Claims (11)

(57) [Claims] 1. A base sheet and a leaf stem portion having a three-dimensional structure in which a plurality of leaf stem portions are projected in a bundle form from the base sheet portion.
A molded artificial grass in which and are integrally fused and molded ,
The leaf stem has a fused ball at the tip, and the leaf stem
The bundles are curled at the tip of each leaf stem in a shape with a bulging central part
It has the form of aggregate in parts, and sand stop sheet is laminated to the substrate sheet back surface of the shaped synthetic grass, and that the sand is filled into the leaves stems portions of the shaped artificial grass A characteristic artificial sand turf containing sand. 2. The size of the molten ball is the thickness of the tip of the leaf stem.
The molded artificial grass with sand according to claim 1, wherein the molded artificial grass contains sand by about 5% or more . 3. The size of the molten ball is the thickness of the tip of the leaf stem.
The molded artificial grass with sand according to claim 1, which is 10% or more to about twice as large . Wherein said leaf and stem portion, the base sheet portion 10-3
The molded artificial turf containing sand according to any one of claims 1 to 3, which protrudes by 0 mm. Wherein said leaf and stem portion, containing sand molding artificial turf <br/> according to any one of claims 1-4 what was fused in part, including at its tip. 6. A portion of the tip is fused is, 5 the leaf and stem density
The artificial sand containing sand according to claim 5, which is 0% or more. 7. The thickness of the stem is 0.5 to 5 mm at the root,
Contracted with the tip formed in the range of 0.1 to 3 mm
Molded artificial grass containing sand according to any one of claims 1 to 6. 8. The base sheet, containing sand molding artificial turf according to any one of claims 1-7 and has a permeability hole. 9. The sand stop sheet is at least 30 g / m
The sand-formed artificial turf according to any one of claims 1 to 8, which is the cloth-like material of item ² . 10. The fabric-like material, a nonwoven fabric-like material of claim
A molded artificial grass containing sand according to item 9 . 11. The sand-filled artificial turf according to claim 10, wherein the non-woven fabric is reinforced with a mesh sheet.