JPH06235159A - Water permeable artificial turf - Google Patents

Abstract

PURPOSE:To obtain water permeable artificial turf having beautiful napping of a pile and firmly held to 4 primary base fabric. CONSTITUTION:A plain weave using nontwist flat yarn 11 as a warp and using low twist filament yarn 12 as weft and tightly contacted between warps and separated in an interval of >=0.2mm between wefts is used as primary base fabric and pile yarn is tufted so that 1 needle gauge (g) of pile corresponds to >=3 warps and 1 stitch gauge (s) corresponds to >=3 wefts and fineness (d) of pile yarn is 5 or more times (d>5px) of the product of number (x) of warp in 1 needle gauge and space (q) between warps and 0.5 or more times (2d>=qy) of the product of number (y) of weft in 1 stitch gauge and space (q) between wefts to form a part where only 3 or more warps are arranged parallel in rows between backstitchs. The part where only these warps are arranged in rows facilitates formation of water-permeable pinholes in coating film for bonding pile to the primary base fabric and thereby water permeable artificial turf is obtained and the root 21 of the pile is interposed between warp and weft and the pile is uniformly and beautifully napped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-permeable artificial lawn in which sprinkling water, rainwater, etc., permeate to the back surface to prevent water pooling on the front surface.

[0002]

2. Description of the Related Art A tufted artificial lawn is a tufted pile fabric prepared by tufting pile yarns having flat cross-section yarns such as tape yarns and split yarns on a primary backing fabric with an adhesive backing applied to the back of the fabric. It is made by bonding the stitch and the primary base cloth. A water-permeable artificial lawn uses a coarse net-like woven fabric having a large mesh gap where the coating film easily breaks as a primary base fabric, in order to make a broken water-permeable hole in the coating film of the adhesive applied to the backing. Made using.

[0003]

When the pile is tufted on the net-like primary backing fabric in this way, the pile is favorably fitted into the large mesh gap of the primary backing fabric, and the pile primary backing fabric should receive it. The pair of pile pieces, which have a weak stopping force, should be U-shaped or U-shaped by aligning the tips of the pair of pile pieces in parallel, the tips of the pair of pile pieces open in a V shape, and the piles vertically project from the primary backing cloth Therefore, it becomes difficult to obtain an artificial lawn suitable for sand-filling construction in which the pile layer is filled with sand. Further, since it easily penetrates through the large interstices of the primary base fabric and bleeds to the pile surface side, a large amount of adhesive is required for backing coating, resulting in high cost. Therefore, an object of the present invention is to eliminate such inconvenience and to inexpensively obtain a water-permeable artificial lawn in which the rising of the pile is clean and which is securely locked to the primary base cloth.

[0004]

Means for Solving the Problems The water-permeable artificial lawn according to the present invention has (a) a flatness m expressed by a ratio of width a to thickness b.
Is 5 or more (m = a / b> 5), the flat yarn 11 made of untwisted, substantially non-hygroscopic plastic is used as the warp, and the twist number is 1
A filament yarn 12 made of a plastic which is 20 times / m or less and is substantially non-hygroscopic plastic is woven with a plain weave design, and the gap p between the left and right warp yarns is 0.2 mm or less, and the space between the left and right warp yarns is 11A.・ 11B is in close contact,
The ratio n between the width e and the thickness f of the woven weft 12 is 5 or more (n = e / f ≧ 5), the weft 12 has a flat cross section, and the gap q between the front and rear wefts is 0. The pile 14 is tufted on the primary base cloth 13A in which the front and rear wefts 12A and 12B are substantially separated by 2 mm or more, the adhesive 15 is applied, and the back stitch 16 is adhered to the primary base cloth 13 to be finished. (B) Pile 14 has one needle gauge g for every three or more warp yarns (11A, 11B, 11C ...), and the pile 14 has three or more weft yarns (12A
12B, 12C ...) is tufted with one stitch gauge s, and (c) the pile thread thickness d in the needle through hole (17) generated in the tufted primary base cloth 13A is: Warp (11A ・ 11B ・) contained in one needle gauge (1g)
5 times or more (d ≧ 5px) of the product of the number x of 11C ... ……) and the gap p between the warp yarns (d ≧ 5px), and (d) the first and second pile pieces 22A 22Bd in the needle through hole 17 are
They are lined up in the stitch direction and sandwiched between the wefts 12A and 12B before and after the needle through hole, respectively. (E) 16A between left and right back stitches caused by tufting
In the space 16A, 16B between the left and right back stitches sandwiched between the needle through holes 17A, 17B of 16B, the weft yarns 12A, 12E before and after the needle through holes are the roots 21 of the pile.
Is pushed back and forth by three or more warp threads 11A ・ 1
Only 1B and 11C are arranged in parallel in stripes, and (f) 10 cm square of artificial grass (10
Adhesive coating 15 at one or more places per 0 cm ² )
It has a pinhole 18 that allows water to pass through.

Here, "substantially non-hygroscopic" means warp 1
The official fraction of plastics, which is the material of 1 and weft 12, is 1%
If it is less than 100%, it means that even a material having some hygroscopicity can be used for warp and weft. However, warp 11
It is desirable that the official fraction of the plastic material that is the material of the weft yarn 12 is zero, and especially the adhesive 15 is difficult to adhere, and the polypropylene or polyester yarns that are easily cracked and opened in the length direction of the fiber are used as the warp yarn 11 or It is recommended to use it for the weft 12. The width a of the warp 11 is 0.5 to 2 mm, the thickness b is 0.2 mm or less, and the oblateness m is 10 or more (m =
a / b ≧ 10).

In order to make the weft yarn 12 have a flat cross section in the primary base cloth 13, (1) when a multi-filament yarn is used as the weft yarn 12, the individual filaments constituting the weft yarn 12 are not strongly bound and are free. In order to facilitate the deformation of each filament in the thickness direction (the direction perpendicular to the weft axis), the multi-filament yarn is easily deformed to a flat shape, and the twist number is set to 120 twists / m or less, and 2) Weft 12
In the case of using monofilament yarn for the reflex type, which has a plurality of groove grooves along its length and is finely split to open into multiple multifilaments, among them, the reflex type polypropylene filament yarn It is advisable to add 120 times / m or less of sweet twist to the reflex type tape yarn, and in particular, the reflex type tape yarn can be spread into many multifilaments in the weaving process of the primary base cloth 13, the tufting process, etc. It is convenient because it can be handled without being twisted, and when it is woven between warps, it has a flat cross section as it is. The warp 11 is 300 to 800 denier, and the weft 1
2 may be 700 to 2000 denier so that the basis weight of the primary base fabric 13 is 80 to 150 g / m ² .

The gap q of 0.2 mm or more is provided between the weft yarns of the primary base cloth 13A before tufting.
The filament fibers constituting B) move in the thickness direction without being constrained by the wefts (12A and 12C) adjacent to each other in the front and rear direction, and each weft (12B) is sandwiched between the flat warp yarns 11 and deformed into a flat cross section. This is for facilitating the pushing and pulling back and forth (the length direction of the primary base cloth 13) by the needles 19 and the pile threads 20 inserted into the primary base cloth 13A during tufting. In order to facilitate the movement of the weft yarn 12 as described above, a non-twisted flat yarn having a flat surface, smooth and slippery is used for the warp yarn 11. The thickness d of the pile yarn 20 in the needle through hole 17 is more than 5 times the product of the number x of the warp yarns 11A, 11B, 11C, ... In each needle gauge and the gap p between the warp yarns (d ≧ 5 px The sum of the gaps (p) between the warp yarns in each needle gauge (1 g) is px, and as the value (px) becomes smaller than the thickness (d) of the pile yarn 20, Root 21 is needle through hole left and right warp threads 11 and 11C
The reason is that they will be pinched firmly. Then, in each needle through hole 17, two pile pieces 22A and 22B, which are the first, are arranged in the stitch gauge direction (s), and a gap (q) between the wefts in each stitch gauge (1s).
Is set to qy, and the weft density is set so that the value (qy) is smaller than the total value (2d) of the thicknesses (d) of the two pile pieces 22A and 22B arranged in the needle through hole 17. Then, the root 21 of each pile is securely held by the wefts 12A and 12E before and after the needle through hole.

Accordingly, the thickness d of the pile yarn 20, the gap p between the warp yarns, the number x of warp yarns in each needle gauge, the gap q between weft yarns, and the number y of weft yarns in each stitch gauge. When the relations of d ≧ 5 px (mm) and 2d ≧ qy are established between them, and the primary base cloth 13 has a plain weave design in which the warp threads 11 and the weft threads 12 do not rise, the pile root 21 has a needle through hole 17 Front, back, left and right warp 11A
A tufted pile cloth fabric for artificial lawn in which 11P and the wefts 12A and 12E are firmly sandwiched and the pile 14 projects vertically from the primary base cloth 13 and the pile stands well and is neatly arranged.

The pile 14 is firmly sandwiched in this manner, and the pile piece 22 sandwiched in this way is set in a state of being bent at a right angle from the back stitch 16, and the back stitch 16 and the front and rear pile pieces 22A are set.・ 22
B has a U shape and the back stitch 16 is the primary base cloth 13
Since the pile 14 is adhered to the primary base cloth 13, a strong adhesive 15 is not required to the left in order to fix the pile 14 to the primary base cloth 13, and the application amount of the adhesive 15 can be reduced. The warp yarns 11 are non-hygroscopic plastic flat yarns to which the adhesive agent 15 is difficult to adhere. The warp yarns are dense between the warp yarns and the adhesive agent 15 does not easily exude to the pile surface side. Most of them adhere to the back stitch 16, and even if the amount of the adhesive 15 applied is reduced, it is possible to obtain a tufted artificial lawn excellent in pile removing strength. When the warp yarn 11 is a flat yarn that is slippery and has no twist, when the two pile pieces 22A and 22B in the needle through hole 17 push the weft yarns 12A and 12E before and after the needle through hole, the left and right back stitches 16A and The entire wefts 12A, 12B, 12C, 12D, 12E contained between 16B are pushed to the front and rear of the needle through hole 17, and as a result, the left and right needle through holes 17A, 17B are formed.
Between them, three or more warps 11A, 11B, 11C will be arranged in parallel in a stripe shape, and between the left and right warps arranged in parallel (11A and 11B, 11B, 11C, ...
...), a slit-shaped vertically elongated hole 23 having a length (h) corresponding to twice the thickness (d) of the pile piece 22 (20) is formed.

When the adhesive 15 is difficult to be applied to the warp threads 11 and the application amount thereof is small, the adhesive 15 is likely to be aggregated inside the flat flat yarn surface 11 due to the surface tension of the adhesive 15, and thus the flat yarn 11 Adhesive 15 to both left and right edges 24 of the
Since the amount of coating of the slit-shaped vertical holes 23 becomes small, it becomes difficult for the slit-shaped vertical holes 23 to be blocked by the adhesive coating film 15. Even if the slit-shaped vertical holes 23 are blocked by the adhesive coating film 15, The coating film is likely to crack along the edge (24) of the slit-shaped elongated hole 23. Since the warp 11 is a flat yarn made of non-hygroscopic plastic, the adhesive 15 is hard to be applied, and the flat weft 12 and the smooth plain weave structure are formed.
When the coating amount (15) is small, the adhesive 15 is smeared on the primary base cloth 13 exposed in the left and right back stitches 16A and 16B, so that the coating 15 is likely to have thick and thin spots. In particular, in the adhesive backing coating method in which the excess adhesive applied by the current doctor roll is scraped off by the doctor knife, only the flat warp yarns 11 are arranged in stripes between the left and right needle through holes 17A and 17B. The adhered adhesive 15 is easily scraped off by a doctor knife in the lengthwise direction of the warp threads 11 arranged in stripes, and the coating film is easily scratched. A water-permeable pinhole 18 is easily formed in the film 15. On the other hand, the twisted pile yarn 20 of the artificial lawn that does not finely open the hair has a circular cross section close to a true circle in the needle through hole 17, and the warp yarns 11 on the left and right of the needle through hole are formed.
Since A.11C is a flat yarn that is difficult to open, flat yarn 11
The side edge 24 of the two forms a common tangent line of the circular cross section of two pile pieces 22A and 22B adjacent to each other in the needle through hole, and as a result, the straight side edge 24 of the warp 11 is formed in the needle through hole 17 A triangular gap 25 surrounded by the peripheral edges of the circular cross-sections of the two pile pieces 22A and 22B is formed. In this case, the adhesive 15 aggregates due to surface tension, and most of the adhesive 15 has a porous backing. Since it is absorbed in the stitches 16, the adhesive coating film 15 on the triangular gap 25 is easily broken during the drying process of the adhesive, and a water-permeable pinhole (18) is easily formed there.

The pinhole (18) of the coating film of the adhesive 15 has a coating amount of the adhesive 15 of 300 g / m ² (dry weight) or less, and the average thickness t of the dried coating film is 1
When the width is 1/5 or less (a ≧ 5t) of 0.2 mm or less, the coating film agglomerates spontaneously during the drying process of the adhesive, but it can be positively formed. Is the adhesive 1
After squeezing the coating film (15) on the slit-shaped longitudinal holes 23 and the gap 25 by applying compressed air (blower) to the coated surface of 5, or scraping off the excess adhesive with a doctor knife It is advisable to apply a brush to the coating film of No. 1 to increase the thickness unevenness. In this method, the amount of adhesive 15 applied is 500
~ 800 g / m ² (dry weight), which is relatively large, and the average thickness of the dry coating film 15 becomes relatively thick, 0.2 to 0.4 mm, and the amount of filler such as calcium carbonate or aluminum hydroxide compounded. Is less than 200 PHR (Per Hundred Resin) and is effective in the case where a dry coating film 15 which is tough and hard to break can be formed. Here, "a water-permeable pinhole" means a hole in which water applied to one side of the artificial lawn oozes to the other side within 30 seconds. Such a pinhole (18) is an artificial lawn. Ten centimeters square of (1
If at least one per 100 cm ² ) can be formed, a water-permeable artificial lawn that can be used practically can be obtained.

[0012]

According to the present invention, the root 21 of the pile 14 is
Is pinched by the warp yarns 11A and 11C and the weft yarns 12A and 12E on the front and rear and right and left in the needle through hole, and is firmly gripped by the primary base cloth 13 so that the pile 14 stands up well, and the adhesive 15 for fixing the pile 14 is applied. The quantity is small.

Therefore, the coating film of the adhesive 15 can be thinned and the side edge 2 of the warp formed in the needle through hole 17 can be formed.
4 and two pile pieces 22A and 22B, a triangular gap 25 surrounded by the peripheral edge of the circular cross section, and the needle through holes 17A and 1A between the left and right back stitches 16A and 16B.
Between the warps 11A and 11B, which are sandwiched between 7B and arranged in parallel,
Adhesive 1 for slit-shaped vertically elongated holes 23 of 1B and 11C ...
A water-permeable artificial lawn can be obtained by forming a water-permeable pinhole (18) on the coating film of No. 5.

Since a small amount of the adhesive 15 for fixing the pile 14 is required, the raw material cost is reduced and the adhesive coating film 1
The heat energy required for drying No. 5 is also saved, the backing coating process of the adhesive is speeded up, and thus a high-quality water-permeable artificial lawn can be obtained efficiently and economically.

In particular, the pile yarn 2 in the needle through hole 17
The thickness d of 0 is the warp thread 11A ・ 11 in each needle gauge.
The product of the number x of B · 11C ··· and the gap p between the warp threads is 5
It is more than double (d ≧ 5 px) and each needle gauge (1
Since the pile root 21 is much thicker than the total amount (px) of the gaps (p) between the warps in g), the warps after tufting are overcrowded, and the pile root 21 has warps on the left and right of the needle through hole. It is firmly sandwiched by the repulsive force from 11 / 11C and the pile rows are neatly aligned in the stitch gauge direction, so it is easy for sand to enter between the pile rows, and sand insertion work for artificial lawns performed by filling sand between the pile rows Will be easier.

[Brief description of drawings]

FIG. 1 is a perspective view of a tufted pile fabric raw material for artificial grass according to the present invention in a tufting step.

FIG. 2 is a surface view of a primary base fabric according to the present invention.

FIG. 3 is a back view of the original fabric of the tufted pile fabric for artificial grass according to the present invention in which a part of the back stitch is cut off.

FIG. 4 is a sectional side view of a water-permeable artificial lawn according to the present invention.

[Explanation of symbols]

 11 Warp (Flat Yarn) 12 Weft (Filament Yarn) 13 Primary Base Fabric 14 Pile 15 Adhesive (Coating) 16 Backstitch 17 Needle Through Hole 18 Pinhole 19 Needle 20 Pile Yarn 21 Pile Root 22 Pile Piece 23 Slit Hole 24 Side edge 25 gap

Claims (4)

[Claims] 1. A flat yarn 11 made of a non-twisted, substantially non-hygroscopic plastic having a flatness m of 5 or more (m = a / b> 5) expressed by a ratio of a width a and a thickness b. Is used as a warp, and a filament yarn 12 that is a sweet twist having a twist number of 120 turns / m or less and is substantially non-hygroscopic plastic is used as a weft and has a plain weave structure, and a gap p between the left and right warps is 0.2 mm. In the following, the left and right warp yarn spaces 11A and 11B are substantially in close contact with each other, and the ratio n of the width e to the thickness f of the woven weft 12 is 5
(N = e / f ≧ 5) and the weft 12 has a flat cross section, and the gap q between the front and rear wefts is 0.2 mm or more, and the front and rear wefts 12A and 12B are substantially separated from each other. The pile 14 is tufted on the primary base cloth 13A, and the adhesive 15
And the back stitch 16 is adhered to the primary base cloth 13 for finishing, and (b) the pile 14 has one needle gauge g for three warps or more (11A, 11B, 11C ...). , Pile 14 has 3 or more weft threads (12
A, 12B, 12C, ...) is tufted with one stitch gauge s, and (c) the pile thread thickness d in the needle through hole (17) generated in the primary base cloth 13A by tufting is d Warp (11A ・ 11B) included in one needle gauge (1g)
・ 11C ... ……) product of the number x and the gap p between the warp threads is 5
It is more than double (d ≧ 5 px), and (d) the second pile piece 22A 22Bd in the needle through hole 17
Are arranged in the stitch direction and are respectively sandwiched by the wefts 12A and 12B before and after the needle through hole, (e)
Between left and right back stitches caused by tufting 1
In the left and right backstitch spaces 16A and 16B sandwiched between the needle through holes 17A and 17B of 6A and 16B, the weft yarns 12A and 12E before and after the needle through hole are pushed back and forth by the root 21 of the pile and three or more warp yarns 11A.
・ Only 11B and 11C are arranged in parallel in stripes, and (f) Water can pass through the adhesive coating film 15 at a ratio of 1 or more per 10 cm square (100 cm ² ) of the artificial grass. A water-permeable artificial lawn having pinholes 18. 2. The thickness d of the pile yarn in the needle through hole (17) produced in the tufted primary base cloth 13A according to claim 1 is one stitch gauge (1).
s) wefts (12A, 12B, 12C ...
...) 0.5 times or more (2d ≧ qy) the product of the number y of the above and the gap q between the wefts. 3. The warp yarn 11 according to claim 1 is a polypropylene flat yarn and the weft yarn 12 is a reflex type polypropylene filament yarn.
Water-permeable artificial lawn described in. 4. The warp yarn 11 according to claim 1 has a denier of 300 to 800 denier, the weft yarn 12 has a denier of 700 to 2000 denier, and the primary basis fabric 13 has a basis weight of 80 to 150 g / m ² . The water-permeable artificial lawn according to claim 1, which is characterized by being present.