JPH09273107A - Artificial lawn with filler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the function, by planting specified curled threads and straight threads in a base cloth and stuffing a filler among the threads and specifying the characteristics of the threads. SOLUTION: A number of curled threads 14 applied with the split processing and straight threads 15 are planted on a base cloth 13 and filler sand 16 is stuffed among the threads 14, 15 to constitute an artificial lawn 10. In this time, the height of the treads 14 is made lower than that of the threads 15 and the front end of the threads 14 is exposed from the filler sand 16 and the threads 14 are curled at the rate of 0. 5 peaks/2.54cm-5 peaks/ 2. 54 am and the thread 15 is a mono-filament type formed of 20-1000 denier per pierce and made of polyamide polyester or the like. In this way, since the curled threads are mixed with the straight threads, an appearance like natural lawn can be obtained. And since a split processing is applied on the curled threads, solidification of the stuffed layer is suppressed and a good grounding touch can be retained for a long time. And also since the straight threads are used as a monofilament type, the skin touch is made favorable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial lawn containing a filler, and more particularly, to an artificial lawn containing a filler that can maintain a good ground contact feeling for a long period of time and can improve touch and appearance. .

[0002]

2. Description of the Related Art In recent years, for example, when constructing a tennis court, the cost of introduction and maintenance is low, and a filling typified by a sand-filled artificial lawn, which is relatively close in appearance and feels like a natural lawn. Artificial grass with wood is often used. Here, the artificial turf with a filler refers to a sheet-like base cloth in which a large number of piles are planted, and fillers such as sand grains and rubber chips are filled between these piles, in particular with a filler. A widely used and well-known artificial grass is a sand-containing artificial grass that uses sand as a filler.

In such an artificial lawn containing a filler, when piles of the same shape are planted uniformly and with high density, the viewer is reminded of, for example, a hair brush or a toothbrush, and the grass surface is harder than it actually is. Gives the impression. When such an impression is given to a competitor who competes in an artificial lawn with a filling material, the competitor may not be able to perform drastic sliding in consideration of the hardness of the turf surface, which may change the character of the competition itself. There is Therefore, the artificial grass with the filler is required to have an appearance similar to that of the artificial grass so as to give the viewer a soft impression. Furthermore, in artificial turf with fillers, when the fillers are tampered with by spikes for competition, the gap between the fillers decreases and the filler layer gradually solidifies, impairing the good grounding feeling obtained at the beginning of construction. There is a problem that it is done, and various ideas have been made.

[0004] For example, the applicant of the present application, straight yarn,
We proposed an artificial lawn containing sand in which a large number of split crimped yarns were planted on a base fabric (Japanese Patent Application No. 7-284467).
No .: Conventional example). According to this conventional example, since the straight yarn and the crimped yarn are mixed, the appearance that is relatively similar to the artificial lawn can be obtained. Further, in this conventional example, since the voids are formed inside the filling layer by the split processing applied to the crimped yarn, the solidification of the filling layer is suppressed, and thereby a good ground feeling can be maintained for a long period of time.

[0005]

However, in recent years, it has been demanded for artificial turf containing a filler to have better touch and appearance. The present invention has been made to satisfy such a demand, and an object thereof is to provide an artificial lawn with a filler capable of maintaining a good ground contact feeling for a long period of time and further improving the touch and the appearance. is there.

[0006]

In order to achieve the above object, the invention described in claim 1 of the present invention is such that a large number of split crimped yarns and straight yarns are planted on a base cloth. In the artificial grass with a filler in which a filler is filled between the crimped yarn and the straight yarn, the straight yarn is a monofilament type.

In this case, as the crimped yarn, for example, tape-shaped, rod-shaped, or tubular piles may be crimped. As the crimping process, for example, a tape-shaped pile is processed into a substantially corrugated shape, or a bar-shaped pile,
The tubular pile may be processed so as to have a substantially bellows shape, and may be formed into a desired shape by, for example, a knit-denit manufacturing method or a jet manufacturing method. Further, as the split processing, it is sufficient to form a cut such as a straight line or a curved line in the pile, and a portion surrounded by the cut may be projected from the crimped yarn in accordance with the crimp processing. Then, the straight yarn may be appropriately split according to the state of use.

These crimped yarns and straight yarns may be individually planted in the tuft holes formed in the base cloth, or a plurality of tufted yarns may be bundled and individually planted. May be. The crimped yarn and the straight yarn may be mixed in the same tuft hole provided in the base cloth, or may be alternately arranged in separate tuft holes or randomly. You may set it up. Further, when a plurality of crimped yarns and a plurality of straight yarns are bundled, they may have the same length or may have different lengths. Further, as the filler, sand, soil, resin particles, cork, etc. can be adopted, and these may be filled alone or in a mixture.

In the invention described in claim 1 of the present invention, since the crimped yarn and the straight yarn are mixedly planted in the base cloth, the filler is so exposed that the crimped yarn and the straight yarn are exposed. By filling with, the appearance similar to that of artificial grass can be obtained as in the conventional case. Further, in the invention described in claim 1, since the crimped yarn is subjected to the split processing, the solidification of the filling layer is suppressed, and a good ground contact feeling can be maintained for a long time as in the conventional case. On the other hand, in the invention described in claim 1, since the straight yarn is a monofilament type, good touch and appearance can be obtained as compared with the case where a tape-shaped straight yarn is adopted, This achieves the above object.

In the invention described in claim 2, the crimped yarn is lower than the straight yarn, and
Since the tip has a height exposed from the filler, it becomes a turf surface in which straight yarns and crimped yarns are unevenly mixed, and an appearance more similar to a natural lawn can be obtained. become. The invention according to claim 3 is characterized in that the number of ridges of the crimped yarn is 0.5 ridges / 2.54 cm to 5 ridges / 2.54 cm. A reduced shape will be obtained. Therefore, in the invention described in claim 3, the appearance similar to that of the natural lawn can be obtained, and the excessive filling of the filler can be effectively prevented. Further, in the invention described in claim 4, since the thickness of the straight yarn is 20 denier to 1000 denier, the straight yarn having an appropriate thinness is more preferable while maintaining durability. You will get a nice touch.

Further, the invention described in claim 5 is characterized in that the filling material has elasticity, for example, granular,
Rod-shaped rubber chips, cork chips, etc. can be used. The filler may be used alone or may be mixed with sand or the like. In the invention described in claim 5, since the filling material appropriately held in the crimped yarn is always present in the filling layer, a good ground contact feeling with rich elasticity can always be obtained.

The invention set forth in claim 6 is characterized in that the straight yarn is mainly composed of a yarn formed of at least one of polyamide and polyester. In the invention described in claim 6, since the straight yarn exhibits a good uprightness as compared with the case where the straight yarn is made of another material, it is less likely to collapse due to a change with time, and good drainage can be maintained. Become. The ratio of the yarn formed of at least one of polyamide and polyester is preferably 20% or more with respect to all straight yarns.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment according to the present invention. In this embodiment, a sand-containing artificial lawn 10 which is an artificial lawn containing a filler is laid on a base material 12 cast on a base ground 11 in order to construct an athletic field such as a tennis court. ing. The sand-containing artificial lawn 10 of the present embodiment is laid on a base material 12 that is flattened by pouring concrete or the like, but for example, grains of crushed stone or the like laid side by side on the foundation ground 11 It may be laid on the body or the base material 12 may be omitted. Further, the sand-containing artificial lawn 10 may be provided with an elastic layer by laying a rubber sheet or the like on the base material 12. This sand-containing artificial lawn 10 has a planar base cloth 13
The crimped yarns 14 and the straight yarns 15 are planted in a predetermined ratio. A space between the crimped yarn 14 and the straight yarn 15 is filled with filler sand 16 which is a filler by a deck brush, thereby forming a filler layer 17.

Incidentally, in this embodiment, as a filler, sand 1 is used.
Although 6 is shown as an example, elastic fillers such as granular or rod-shaped rubber chips and crushed cork chips may be used. With such a filling material, elasticity can be obtained in the filling layer, and the ground contact feeling can be further improved.

As shown in FIG. 2, the crimped yarn 14 has a substantially tape shape, and is split and crimped. A plurality of the crimped yarns 14 are planted in a tuft hole formed in the base fabric 13 as a bundle (see FIG. 1). On the other hand, the straight yarn 15 is of a monofilament type formed of polyamide or polyester in a denier of 20 to 1000 denier per book, and a plurality of tufts are planted in a tuft hole formed in the base cloth 13 as a bundle. There is.

These crimped yarns 14 and straight yarns 1
5 is the base cloth 1 so that the ratio becomes 1: 9 to 9: 1.
The tufts are alternately tufted with 3/5/32 gauge and 3 stitches, and the straight yarn 15 is appropriately split-processed as necessary. The bundle of crimped yarns 14 and straight yarns 15 may be randomly planted in a large number of tuft holes formed in the base fabric, and the mixed planting ratio per given area is 1: 9 to 9: 1. It should be In addition, the crimped yarn 14 and the straight yarn 15 may be planted one by one in the tuft holes, or may be planted in a bundle mixed with each other.

The split processing is performed by a number of cuts 1 which penetrate the crimped yarn 14 in the thickness direction and are continuous in the longitudinal direction.
4A is irregularly formed. On the other hand, the crimping process is the crimped yarn 1.
4 is 0.5 crests / 2.54 cm or 5 crests / 2.54 cm
The crimping is performed by a knit denit manufacturing method or a jet manufacturing method. Therefore, in the crimped yarn 14, the protruding portion 14 </ b> B surrounded (sandwiched) by the notch 14 </ b> A is curved along with the crimping process, and the void 2 protruding from the crimped yarn 14 is formed.
Form 0. The void 20 is formed by appropriately selecting the form of the cut 14A and the crimping degree of the crimped yarn 14.
It is difficult for the grain sand 16 filled around the crimped yarn 14 to enter, and the grain sand 16 that has entered is easily discharged to the outside.

The artificial grass with sand 1 of this embodiment as described above
According to 0, since the crimped yarn 14 and the straight yarn 15 are mixedly planted in the base cloth 13, the appearance similar to that of a natural lawn can be obtained as in the conventional case. Further, according to the sand-containing artificial lawn 10, since the crimped yarn 14 is subjected to the split processing, the filling layer 17 is suppressed from being solidified, and a good ground contact feeling can be maintained for a long time as in the conventional case. On the other hand, according to the sand-containing artificial lawn 10 of the present embodiment, the straight yarn 15 is a monofilament type, so that, for example, better feel and appearance can be obtained as compared with the case where a tape-shaped straight yarn is adopted.

Further, since the crimped yarn 14 is lower than the straight yarn 15 and has a height where the tip is exposed from the filling layer 17, the turf surface of the sand-containing artificial lawn 10 becomes uneven, and Appearance similar to that of natural grass can be obtained. Especially,
The number of peaks of the crimped yarn 14 is 0.5 peaks / 2.54 cm to 5
Since the height is 2.54 cm, an appearance similar to that of a natural lawn with an appropriate crimped shape can be obtained, and excessive filling of the filler can be effectively prevented. Further, since the straight yarn 15 has a thickness of 20 denier to 1000 denier, the touch is further improved. Since the straight yarn 15 is made of polyamide or polyester, it shows good uprightness as compared with the case where the straight yarn is made of another material. Therefore, in the sand-containing artificial lawn 10, the straight yarn 15 is less likely to collapse due to a change with time, and thus good appearance and drainage can be maintained.

3 and 4 show another embodiment according to the present invention. In each embodiment described below, the members already described with reference to FIGS. 1 and 2 are denoted by the same reference numerals in the drawings to simplify or omit the description. Artificial lawn 30 with filler shown in FIG.
In, the deep portion of the filling layer 31 is formed by the elastic filler 32. That is, the filling layer 31 is filled with an elastic filler 32 such as granular or rod-shaped rubber chips or crushed cork chips between the crimped yarns 14 and the straight yarns 15, and then the sand filler is provided so as to cover the elastic fillers 32. 16 are filled. According to the artificial turf 30 with a filling material of such an embodiment, since the deep part of the filling layer 31 is formed by the elastic filling material 32, compared to the case where sand, soil, etc. are used alone as the filling material. A good touch feeling can be obtained.

On the other hand, the artificial grass 40 containing the filler shown in FIG.
The filling layer 41 is formed of the sand 16 and the elastic filler 32 which are mixed with each other. According to the artificial turf 40 with a filler of such an example, the same effect as the artificial turf 30 with a filler mentioned above is acquired. Then, according to the artificial grass 40 containing the filling material, the filling layer 41
When forming the, it is not necessary to individually fill the sand 16 and the elastic filler 32 between the crimped yarn 14 and the straight yarn 15, and the construction can be simplified.

[0022]

[Examples] Next, a large number of artificial grasses 10 with sand are actually constructed by changing the crimping degree, height, thickness, material, mixed planting ratio of the crimped yarn 14 and the straight yarn 15 and the composition of the filling layer. Then
The change in the feeling of contact with the ground, the appearance and the durability were evaluated, and will be described together with Comparative Examples based on Tables 1 to 3.

[0023]

[Table 1]

[0024]

[Table 2]

[0025]

[Table 3]

[0026]

[Table 4]

The crimp degree of the crimped yarn 14 is
Is an average value obtained by measuring 100 peaks / 2.54 cm at random. Here, as the method of counting the number of threads, for example, the method of counting the screw threads on the bolt is followed. In addition, the change in the feeling of contact with the ground is to measure Gmax1 by a head model drop test immediately after the artificial grass 10 containing sand is constructed,
After that, when the grass surface was compressed 10,000 times by a predetermined compactor, the difference from Gmax2 measured later was calculated as ΔGmax.
Displayed as That is, the change in the feeling of contact is ΔGma
The smaller the value of x, the better.

Further, as described above, the appearance of the sand-filled artificial lawn 10 is 1 by a predetermined compactor after the construction.
The appearance of the turf surface after being compressed 0000 times is visually recognized by multiple outdoor athletes, and the straight thread maintains the uprightness, which is similar to the appearance of a natural lawn. , ○: good, △: good, ×: bad The average of four grades was used. Next, as the evaluation of the skin feel, the feeling when sliding on the artificial grass with sand 10 by a plurality of outdoor athletes is based on being similar to the feeling when sliding on the natural grass.
・ ・ ・ Extremely good, ○ ・ ・ ・ Good, × ・ ・ ・ Not acceptable

Further, as the evaluation of durability, after the turf surface was compressed 10,000 times by a compaction machine, the above-mentioned plural outdoor athletes observed the collapse (sagging) of the straight yarn 15, and ◎ ... very good ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ ∘ ∙ In these examples and comparative examples, when the crimped yarn 14 and the straight yarn 15 are mixed, the ratio of 5 /
Alternately tufted with 32 gauge, 3 stitches, crimped yarn 14
Alternatively, when the straight yarn 15 was used alone, the base fabric 13 was tufted with 5/32 gauge and 3 stitches.

(Example 1) A monofilament type straight yarn 15 was formed of polyamide to a thickness of 450 denier / thread and a height of 30 mm, and the split crimped yarn 14 had a crimp degree of 4.00. /2.54
cm and height 24.0 mm. Then, these straight yarns 15 and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 21:79, and 25.5 mm of sand was filled as a filler. In this Example 1, ΔGmax is 2, appearance and touch are evaluated as ◯, and durability is evaluated as ⊚.

(Example 2) Monofilament type straight yarn 15 was formed of polyamide to a thickness of 450 denier / piece and a height of 30 mm, and split crimped yarn 14 was crimped to have a crimp degree of 4.03. /2.54
cm and height 24.3 mm. Then, these straight yarns 15 and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 79:21, and 25.5 mm of sand was filled as a filler. In this Example 2, ΔGmax is 4, the appearance is evaluated as ◯, and the touch and durability are evaluated as ⊚ to ∘.

(Embodiment 3) A straight filament 15 of monofilament type is formed of polyethylene to have a thickness of 450 denier / piece and a height of 30 mm, and the crimped yarn 14 subjected to split processing has a crimp degree of 3.99. /2.5
It was formed to have a height of 4 cm and a height of 24.6 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand is used as a filler in an amount of 25.8 mm.
Filled. In this Example 3, ΔGmax is 6, the appearance is evaluated as ◯, the touch is evaluated as ⊚ to ◯, and the durability is evaluated as ◯.

(Embodiment 4) Monofilament type straight yarn 15 is formed of polyethylene to have a thickness of 450 denier / thread and a height of 30 mm, and the split crimped yarn 14 has a crimp degree of 4.12. /2.5
It was formed to have a height of 4 cm and a height of 24.2 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand is used as a filling material for 22.5 mm.
Filled. In Example 4, ΔGmax is 2, appearance and touch are evaluated as ⊚, and durability is evaluated as ∘.

(Embodiment 5) Monofilament type straight yarn 15 is formed of polyethylene to have a thickness of 19 denier / piece and a height of 30 mm, and the split crimped yarn 14 has a crimp degree of 4.58 ridges. /2.54
cm and height 23.4 mm. Then, these straight yarns 15 and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 50:50, and 21.0 mm of sand was filled as a filler. In Example 5, ΔGmax is 4, appearance and touch are evaluated as ⊚, and durability is evaluated as ◯ to Δ.

(Embodiment 6) Monofilament type straight yarn 15 is formed of polyethylene to have a thickness of 1010 denier / piece and a height of 30 mm, and the split crimped yarn 14 is crimped at 4.96 threads. / 2.
It was formed to have a height of 54 cm and a height of 24.6 mm. Then, the straight yarns 15 and the crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand as a filler is 20.7 m.
m. In Example 6, ΔGmax is 3, the appearance is evaluated as ⊚, and the touch and durability are evaluated as ∘.

(Embodiment 7) A monofilament type straight yarn 15 is formed of polyethylene to have a thickness of 25 denier / thread and a height of 30 mm, and the split crimped yarn 14 is crimped at 4.90 threads. /2.54
cm and height 25.2 mm. Then, these straight yarns 15 and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 50:50, and 22.5 mm of sand was filled as a filler. In Example 7, ΔGmax is 3, appearance and touch are evaluated as ⊚, and durability is evaluated as ∘.

(Embodiment 8) Monofilament type straight yarn 15 is formed from polyethylene to have a thickness of 990 denier / piece and a height of 30 mm, and the split crimped yarn 14 is crimped at 4.40 threads. /2.5
It was formed to have a height of 4 cm and a height of 25.8 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand as a filler is 22.8 mm.
Filled. In Example 8, ΔGmax is 3, the appearance is evaluated as ⊚, the touch is evaluated as ⊚ to ○, and the durability is evaluated as ∘.

(Embodiment 9) Monofilament type straight yarn 15 is formed of polyamide to a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 has a crimp degree of 3.96. /2.54
cm and height 24.6 mm. Then, these straight yarns 15 and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 50:50, and 23.4 mm of sand was filled as a filler. In this Example 9, ΔGmax is 1, appearance,
The skin feel and durability are rated as ◎.

(Embodiment 10) Straight filament 15 of monofilament type is formed of polyester to have a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 has a crimp degree of 3.88. / 2.
It was formed to have a height of 54 cm and a height of 24.3 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand as a filler is 22.2 m.
m. In Example 10, ΔGmax is 1, and appearance, touch and durability are evaluated as ⊚.

(Embodiment 11) Monofilament type straight yarn 15 is formed of polyamide to have a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 has a crimp degree of 0.46. /2.5
It was formed to have a height of 4 cm and a height of 25.5 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand is used as a filling material for 22.5 mm.
Filled. In Example 11, ΔGmax is 6, the appearance is evaluated as ◯, the touch is evaluated as ⊚ to ◯, and the durability is evaluated as ◯.

(Embodiment 12) Monofilament type straight yarn 15 is formed of polyamide to have a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 has a crimp degree of 0.52 crests. /2.5
It was formed to have a height of 4 cm and a height of 24.9 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand as a filler is 23.1 mm.
Filled. In this Example 12, ΔGmax is 3, appearance and touch are evaluated as ⊚, and durability is evaluated as ∘ to ∘.

(Example 13) Monofilament type straight yarn 15 was formed of polyamide to have a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 was crimped with a crimp degree of 1.01. /2.5
It was formed to have a height of 4 cm and a height of 24.0 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand as a filler is 22.8 mm.
Filled. In this Example 13, ΔGmax is 2, and appearance, touch and durability are evaluated as ⊚.

(Embodiment 14) A straight filament 15 of monofilament type was made to have a thickness of 4 with polyvinylidene fluoride.
50 denier / piece, height 30mm, and
The crimped yarn 14 subjected to the split processing has a crimping degree of 3.06.
It was formed to have a height of 2.54 cm and a height of 24.0 mm. Then, these straight yarn 15 and crimped yarn 14 are
The base cloth 13 was mixed and planted at a ratio of 0:50, and 22.8 mm of sand was filled as a filler. In this example 14, ΔGma
x is 1, appearance and feel are ◎, and durability is ◎ to ○
It is evaluated.

(Example 15) A monofilament type straight yarn 15 was formed from polyamide to a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 was crimped at a degree of 5.10. /2.5
It was formed to have a height of 4 cm and a height of 24.0 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand is used as a filling material for 22.5 mm.
Filled. In Example 15, ΔGmax is 3, the appearance is evaluated as ◯, the touch is evaluated as ⊚ to ◯, and the durability is evaluated as ◯.

(Example 16) A straight filament 15 of monofilament type was formed from polyamide to a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 was crimped at 4.95 threads. /2.5
It was formed to have a height of 4 cm and a height of 24.0 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand as a filler is 22.2 mm.
Filled. In this Example 16, ΔGmax is 1, appearance and touch are evaluated as ⊚, and durability is evaluated as ∘ to ∘.

(Example 17) A straight filament 15 of monofilament type was formed from polyamide to a thickness of 450 denier / piece and a height of 30 mm, and the crimped yarn 14 subjected to the split processing had a crimp degree of 3.98. /2.5
It was formed to have a height of 4 cm and a height of 24.7 mm. Then, these straight yarns 15 and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 50:50, and 23.0 mm of a filler in which rubber particles and sand were mixed was filled. In this example 17, ΔG
Max is 0, appearance and touch are rated ⊚- ○, and durability is rated ⊚.

(Example 18) Monofilament type straight yarn 15 was formed of polyamide to have a thickness of 450 denier / piece and a height of 30 mm, and the split crimped yarn 14 had a crimp degree of 3.90. /2.5
It was formed to have a height of 4 cm and a height of 24.3 mm. Then, these straight yarns 15 and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 50:50, rubber particles were filled, and then sand was filled to form a filled layer having a thickness of 23.0 mm. This Example 18
In the above, ΔGmax is 0, and appearance, touch and durability are evaluated as ⊚.

(Example 19) A straight filament 15 of monofilament type was formed from polyamide to a thickness of 450 denier / piece and a height of 30 mm, and the crimped yarn 14 subjected to split processing had a crimp degree of 3.91. /2.5
It was formed to have a height of 4 cm and a height of 24.3 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 in a ratio of 50:50, and rubber particles are used as a filler in an amount of 22.6.
mm filled. In this Example 19, ΔGmax is 0,
Appearance and touch are rated as ○, and durability is rated as ◎.

(Embodiment 20) Monofilament type straight yarn 15 is formed of polyamide to have a thickness of 450 denier / piece and a height of 28.5 mm, and the split crimped yarn 14 has a crimping degree of 4. 32 mountains /
It was formed to have a height of 2.54 cm and a height of 30 mm. Then, these straight yarns 15 and crimped yarns 14 are mixed and planted in the base cloth 13 at a ratio of 50:50, and sand as a filler is 26.4 m.
m. In this Example 20, ΔGmax is 2, appearance and touch are evaluated as ◯ to Δ, and durability is evaluated as ⊚ to ◯.

(Comparative Example 1) The crimped yarn 14 subjected to the split processing was crimped with a crimp degree of 4.03 peaks / 2.54 cm and a height of 2.
It was formed into 5.0 mm and planted in the base cloth 13, and 22.5 mm of sand was filled as a filler. In this comparative example 1, ΔGm
The ax is 3, the appearance and touch are evaluated as x, and the durability is evaluated as o. (Comparative Example 2) Monofilament type straight yarn 1
Polyamide 5 with thickness 450 denier / piece, height 3
It was formed into 0 mm and was planted in the base cloth 13, and was filled with sand as a filling material in an amount of 27.0 mm. In this comparative example 2, ΔGmax
No. 9, the appearance was evaluated as ○ to △, the touch was evaluated as ○, and the durability was evaluated as △ to ×.

(Comparative Example 3) A straight yarn in the form of a tape, which is split, is formed of polyamide to a thickness of 450 denier / piece and a height of 30 mm, and the crimped yarn 14 which is split is crimped. 4.20 degrees /
It was formed to have a height of 2.54 cm and a height of 27.0 mm. And
These straight yarns and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 50:50, and 25.4 m of sand was used as a filler.
m. In Comparative Example 3, ΔGmax is 2, appearance is evaluated as Δ, touch is evaluated as ×, and durability is evaluated as ⊚ to ∘.

(Comparative Example 4) A straight filament of multifilament type was made of polyamide and had a thickness of 450 denier /
The crimp yarn 14 formed into a bundle and a height of 30 mm and subjected to a split process has a crimp degree of 4.19 ridges / 2.54c.
m and height 26.4 mm. Then, these straight yarns and crimped yarns 14 were mixed and planted in the base cloth 13 at a ratio of 50:50, and 22.8 mm of sand was filled as a filler. In Comparative Example 4, ΔGmax is 3, the appearance is evaluated as x, the touch is evaluated as o, and the durability is evaluated as x.

(Comparative Example 5) Monofilament type straight yarn 15 was formed with polyamide to a thickness of 450 denier / piece and a height of 30 mm, and was planted in a base cloth 13, and 27.0 mm of rubber particles were filled as a filler. . This Comparative Example 5
Then, ΔGmax is 2, appearance and touch are evaluated as Δ,
Durability is evaluated as Δ to ×.

From the above evaluation, it can be seen that, in each of the examples, since the straight yarn and the crimped yarn are mixed and planted, the appearance and the touch are superior to those of the comparative examples 1 and 2. Further, in each of the examples, since the straight yarn is of the monofilament type, it can be seen that the appearance and the touch are dramatically improved as compared with Comparative Example 3.

In addition, among the respective examples, Examples 4 to 16 have a height at which the crimped yarn 14 is exposed from the filler material 16, and therefore are compared with Examples 1 to 3. It can be seen that excellent appearance can be obtained. And Example 1
It is understood that the crimped yarns 14 in Example 19 are lower than the straight yarns 15 and therefore better appearance and feel can be obtained as compared with Comparative Example 20.

In addition, in Examples 12 to 14 and Example 16, the crimped yarn 14 has an appropriate crimped shape of 0.5 crests / 2.54 cm to 5 crests / 2.54 cm. , G compared to Examples 11 and 15
The value of max can be reduced and the appearance, touch,
It can be seen that each evaluation of durability is good. Furthermore, among Examples 4 to 16, Example 4 and Example 7
In Example 16 to Example 16, since the thickness of the straight yarn 15 is 20 denier to 1000 denier, it can be seen that the appearance, touch and durability are highly balanced in comparison with Examples 5 and 6. .

Then, Examples 17 to 19 are
It can be seen that since the elastic filler is used, the absolute value of Gmax and the value of ΔGmax are better than those of Example 9. From these facts, if the elastic filler is used as the filler of the artificial grass containing the filler, the hardness of the grass surface and the characteristics of hardness change can be significantly improved. Furthermore, comparing Example 19 with Comparative Example 5, it is found that it is necessary to use the elastic filler as the filler and to mix the crimped yarn and the straight yarn subjected to the split processing. In addition, in Examples 9 and 10, since the straight yarn 15 is formed of polyamide and polyester, respectively, compared to Examples 3 to 8 and 14, the settling is less and the durability is improved. It can be seen that

The present invention is not limited to the above-mentioned embodiments. For example, the crimped yarn shown in the above-mentioned embodiments,
Material, shape, size, form, number of straight yarn and filler,
Arrangement locations and the like are arbitrary as long as the present invention can be achieved, and improvements, modifications and the like within the range in which the present invention can be achieved are included in the present invention.

[0059]

According to the invention described in claim 1 of the present invention, it is possible to maintain a good feeling of contact with the ground for a long period of time and to improve the touch and the appearance. Further, according to the invention described in claim 2, the lawn surface can be made to have an uneven shape more similar to a natural lawn. According to the invention described in claim 3, the crimped yarn having an appropriate crimped shape can provide an appearance more similar to that of a natural lawn and can effectively prevent excessive filling of the filler.

Further, according to the invention described in claim 4, the straight yarn having an appropriate thinness can provide a better touch. According to the invention described in claim 5,
Since the filling material has elasticity, it is possible to obtain a good feeling of contact with ground that is even more elastic. Further, according to the invention described in claim 6, since the straight yarn exhibits better uprightness as compared with the case where the straight yarn is made of another material, it is possible to maintain good appearance and drainage for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention.

FIG. 2 is a front view and a side view showing a crimped yarn.

FIG. 3 is a schematic sectional view showing another embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

10, 30, 40 Artificial lawn containing sand which is an artificial lawn containing filler 14 Crimped yarn 15 Straight yarn 16 Grain sand which is a filler 32 Elastic filler which is a filler

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masakazu Tanaka 1 1 41, Shimizu, Uozumi Town, Akashi City, Hyogo Prefecture

Claims (6)

[Claims] 1. A filler-containing artificial grass in which a large number of split crimped yarns and straight yarns are planted in a base fabric, and a filler is filled between the crimped yarns and the straight yarns. An artificial lawn containing a filler, wherein the straight yarn is a monofilament type. 2. The artificial turf with a filler according to claim 1, wherein the crimped yarn is lower than the straight yarn, and the tip of the crimped yarn has a height exposed from the filler. . 3. The number of peaks of the crimped yarn is 0.5 peaks / 2.54
Artificial lawn with a filler according to claim 1, characterized in that the height is cm to 5 peaks / 2.54 cm. 4. The artificial grass with a filler according to claim 1, wherein the straight yarn has a thickness of 20 denier to 1000 denier. 5. The artificial turf with a filler according to claim 1, wherein the filler has elasticity. 6. The artificial lawn with a filler according to claim 1, wherein the straight yarn is mainly composed of a yarn formed of at least one of polyamide and polyester.