JPH09242012A - Pile yarn for artificial grass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pile yarn made of synthetic fiber having matting effect, excellent feeling, high strength and settling resistance. SOLUTION: When the mean width is (a), the mean thicknes is (b), respectively set in the sectional form of pile yarn A, rlation of 5<=a/b<=30 is satisfied, and this pile yarn is uneven on both sides and the fineness is 500-5000dr. When maximum width is (a'), the maximum thickness is (b') is respectively set in the sectional form of pile yarn B, 1<=a'/b'<=5 is satisfied, and the fineness is 1000-10000dr. This artificial lawn is constituted by mixedly planting the pile yarn A and B, the ratio of fineness B/A is in the range 2-20, and the mix rate of B is 40-60wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile yarn for artificial lawn, and more specifically, a synthetic fiber artificial lawn having a good texture, an excellent matting effect, high strength and sag resistance. Pile pile yarn.

[0002]

2. Description of the Related Art Artificial lawns are made by laying pile threads made of synthetic resin fibers such as nylon, polyester, polypropylene, polyvinylidene chloride, etc. on a base cloth and lined them, and are more seasonable than natural lawns. It is widely used for sports facilities, greening of parks, etc., or for decorative purposes for various exhibitions because it is easy to maintain. As this artificial lawn pile yarn, a flat yarn is generally used to resemble the shape of a natural lawn, but since a flat yarn has a luster peculiar to synthetic resin, it is slightly different from the green color tone and texture of the natural lawn. There are drawbacks such as differences,
In addition, when the pile yarns are stepped down because the flat yarns are stacked and layered, only the pile yarns on the surface are subject to wear or impact, and the pile yarns on the inner surface are subjected to the load while lying down. Since it is continuously deformed at a steep angle, it has problems such as lack of sag resistance, poor wear resistance and strength.
Further, if the fineness of the pile yarn is lowered to impart flexibility and improve the feeling of treading, there is a problem that the fiber loses its durability and elasticity and becomes fibrillated, while the fineness of the pile yarn is increased. When it is raised, the durability and elasticity are improved, but it becomes rigid, and a pile material or composition satisfying all of these characteristics has not yet been found.

[0003]

DISCLOSURE OF THE INVENTION The object of the present invention is to have a matting effect, an excellent appearance, and a good touch such as texture,
Another object of the present invention is to provide a synthetic yarn made of synthetic fibers, which has mechanical properties such as high tenacity and sag resistance.

[0004]

According to the present invention, a plurality of types of pile yarns having a specific shape made of synthetic fibers are mixed by a specific mixing method to solve the above problems and complete the present invention. It is a thing.

According to the present invention, when the average width of the cross-sectional shape of the pile yarn (A) is a and the average thickness is b, 5 ≦ a / b ≦ 30.
And a fineness of 500 to 5000 having irregularities on the front and back surfaces.
When the maximum width of the cross-sectional shape of the dr yarn and (B) pile yarn is a'and the maximum thickness is b ', 1 ≤ a' / b '≤ 5
And a yarn having a fineness of 1000 to 10000 dr is mixed and mixed, and the fineness ratio of (B) / (A) is mixed in the range of 2 to 20, and the mixing ratio of (B) is 40 to 60% by weight. A synthetic yarn made of synthetic fibers for artificial grass.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

(A) The shape of the pile yarn is a flat yarn having a non-circular cross-sectional shape, and as shown in FIG. 1, when the flat width has an average width a and an average thickness b, 5 ≦ a / b ≦ 30, preferably 10 ≦ a / b ≦ 20. Usually, a is 0.2-5 m
m and b are used in the range of 0.02 to 0.15 mm. It is preferable that the outer periphery of the cross-sectional shape has almost no straight line portion and is composed of a curved line. The unevenness on the front and back surfaces has a recess depth of preferably 0.01 to 0.05 mm, more preferably 0.02 to 0.04 mm.

(A) As a method for forming unevenness on the front and back surfaces of pile yarn, embossing is applied to the front and back surfaces of the flat yarn, and unevenness is formed by a cooling roller having grooves or holes on the front and back surfaces of the flat yarn. Forming method, imparting scratches to the front and back surfaces of the flat yarn, forming protrusions on the front and back surfaces by utilizing phenomena such as melt fracture during melt extrusion of pile yarn, and adding a foaming agent to the resin. Examples thereof include a method of foaming at the time of melting to form irregularities on the front and back surfaces, a method of using a specific die having an irregular cross-section that forms an irregular cross-section even after being melt-extruded and cooled and solidified, and a method of using a continuous filament monofilament extrusion die. Among these, the method of using a continuous filament shaped monofilament extrusion die is most preferable in terms of the shape of front and back surfaces having regular unevenness, the stretchability and the moldability.

As a method for producing a continuous filament monofilament, a circular hole having a nozzle diameter of 0.5 to 1.5 mm is used.
-30 The spun product melt-extruded using a die having a continuous yarn structure is cooled, and a monofilament having a single yarn fineness of 1000 to 2000 dr is drawn while maintaining the continuous yarn shape and a draw ratio of 5 to 5.
A method of forming a continuous filament monofilament having a total fineness of 500 to 5000 dr by stretching it 10 times may be mentioned.

Next, the shape of the pile yarn (B) is a flat yarn having a non-circular cross section, and as shown in FIG. 2, the flat width has a maximum width a'and a maximum thickness b '. When doing, 1 ≦
a ′ / b ′ ≦ 5, preferably 1 ≦ a ′ / b ′ ≦ 2. Normally, a is 0.2-2 mm, b is 0.2-0.4 mm
Used in the range. The cross-sectional shape may be a rectangular shape, an elliptical shape, etc. (shown in FIG. 2 (II)), but may be a dumbbell shape, an H-shape, etc. (shown in FIG. 2 (I)). . Among these, the H-type flat yarn is most preferable because it is lightweight, has excellent elasticity, and has an excellent lodging prevention effect.

As a method for producing an H-shaped flat yarn, a melt-extruded spun product is cooled using a die having an H-shaped nozzle opening, and a monofilament having a single yarn fineness of 200 to 500 dr is drawn at a draw ratio of 5 to 10. Stretched twice and has a total fineness of 100
A method of forming an H type flat yarn of 0 to 10000 dr can be mentioned.

The shape of the flat yarn spun from the nozzle having the above-mentioned shape is close to the nozzle shape because the surface area approaches the minimum due to the surface tension before the molten resin is solidified. It may have a non-molded shape.

The fineness of the pile yarn depends on the use,
(A) The pile yarn has a fineness selected from the range of 500 to 5000 dr, and (B) the pile yarn has a fineness of 1000 to 1000.
It is selected from the range of 0dr. When selecting the pile yarns (A) and (B), it is essential that the fineness ratio (B) / (A) is mixed in the range of 2 to 20. If the (B) / (A) fineness ratio is less than 2, the thicknesses of the (A) and (B) pile yarns are close to each other, and the characteristics of the (B) pile yarn exhibiting elasticity and sag resistance are fully exhibited. When the fineness ratio of (B) / (A) exceeds 20, the pile yarns of (A) and (B) are separated in thickness, and the characteristics of the (A) pile yarn bring about a texture and a matting effect. I can't show enough.

The mixing ratio of the pile yarn (B) is 40 to 60% by weight.

The synthetic fiber of the present invention is not particularly limited to the raw material resin, and examples thereof include nylon, polyester, polypropylene and polyvinylidene chloride. These may be used for either the (A) pile yarn or the (B) pile yarn, and may be used alone or in combination of two or more kinds. Nylon and polyester are excellent in elastic recovery and abrasion resistance, but they are inferior in flexibility and have a slightly hard feel, and polypropylene and polyvinylidene chloride are flexible and have a texture similar to natural grass. However, it has drawbacks such as poor weather resistance and strength.
In the present invention, nylon or polyester having excellent elastic recovery, abrasion resistance and the like is used as the flat yarn (A), which is flexible and natural as the flat yarn (B). Preference is given to using polypropylene or polyvinylidene chloride, which has a grass-like texture.

The synthetic resin of the present invention includes an ultraviolet absorber, a light stabilizer, an antioxidant, a lubricant, a matting agent, a flame retardant, an antistatic agent, an inorganic filler, and the like, within the scope of the present invention. You may mix | blend additives, such as a crosslinking agent, a foaming agent, and a coloring agent.

[0016]

【Example】

(A) Pile yarn Commercially available nylon 6 (manufactured by Toray Industries, Inc .: C
M1046-X04) was melt-extruded using a 20 continuous yarn-shaped nozzle having a circular hole with a diameter of 1.2 mm to obtain a spun product having a single yarn fineness of 400 dr. While maintaining this 20 continuous yarn shape, it is stretched 8 times on a hot plate of 150 degrees, and 20 continuous yarn fineness 1
000dr pile yarn was obtained. (B) Pile yarn polypropylene (MFR = 2.0g / 10min.,
Density = 0.90 g / cm ³ ), a '= 3 mm, b' = 2 mm H
Melt extrusion was performed using a mold nozzle to obtain a spun product having a single yarn fineness of 32000 dr. This was drawn 8 times on a hot plate of 130 degrees to obtain a pile yarn with a fineness of 4000 dr. Nylon 6 above
50% by weight of (A) pile yarn and 50% by weight of polypropylene (B) pile yarn are evenly mixed, and 16 mm gauge, 10 mm stitch, and the number of compound yarns per share are 10 on the base cloth. Strains, pile planting with a pile length of 30 mm,
Pile density 1.86 million / m ² , pile weight 520g /
An artificial lawn of m ² was obtained. The artificial lawn thus obtained is
It had a soft texture and a matt effect-like natural grass appearance, with elastic tread and sag resistance.

[0017]

INDUSTRIAL APPLICABILITY According to the present invention, a flattened yarn having irregularities on the front and back surfaces and a flattened yarn having a specific shape with a low flatness are mixed at a specific mixing ratio to provide a matting effect,
A synthetic yarn made of synthetic fiber for artificial grass having excellent texture, high strength and sag resistance was obtained. The artificial lawn pile thread is used for baseball fields, golf fields, soccer fields, athletic facilities such as tennis courts, greening of parks and gardens, terraces and balconies of various buildings, and decorative purposes for exhibitions. Widely used as pile yarn for artificial grass.

[Brief description of drawings]

FIG. 1A is an enlarged cross-sectional view of a pile yarn.

FIG. 2 (B) is an enlarged cross-sectional view of a pile yarn.

[Explanation of symbols]

 a (A) Average width of pile yarn b (A) Average thickness of pile yarn a '(B) Maximum width of pile yarn b' (B) Maximum thickness of pile yarn

Claims (1)

[Claims] 1. (A) When the average width of the cross-sectional shape of the pile yarn is a and the average thickness is b, 5 ≦ a / b ≦ 30, and a fineness of 500 to 5000 dr having irregularities on the front and back surfaces. When the maximum width of the cross-sectional shape of the pile yarn (B) is a ′ and the maximum thickness is b ′, 1 ≦ a ′ / b ′ ≦ 5, and a yarn having a fineness of 1,000 to 10,000 dr. Mixed plant,
The (B) / (A) fineness ratio is mixed in the range of 2 to 20,
A pile yarn for synthetic grass made of synthetic fiber, wherein the mixing ratio of (B) is 40 to 60% by weight.