JPH09273109A - Artificial lawn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the capacity, by planting multi-filament type straight threads and splitted type straight threads at a specified ratio on a base cloth and stuffing a filler among the threads and specifying the thickness of threads. SOLUTION: The first straight threads 11 and the second straight threads 12 are mixed and planted at the ratio of (1:9)-(8:2) on a base cloth 13 and a sand filler 14 is charged among the threads 11, 12, to constitute an artificial lawn 10. The thread 11 is made of a multi-filament provided with a plurality of minimum constituting threads of 5-100 denier and the diameter thereof is made smaller than 8000 denier. The thread 12 is a splitted type in which a number of notches are formed in a tapeform pile and the ends therof are branched and twisted. In this way, since the contact area on a player's skin gets smaller because of the multi-filament type threads, a risk of skin burn is lessened and since the first straight threads hardly erected are supported by the second straight threads, the appearance is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial lawn, and more particularly to an artificial lawn capable of reducing the coefficient of friction of the grass surface and maintaining good appearance for a long period of time.

[0002]

2. Description of the Related Art In recent years, artificial lawns that are often used in stadiums such as baseball fields and soccer fields are constructed by laying a sheet-like base cloth on which a large number of synthetic resin piles are planted, and then laying the piles. Construction is performed by filling a filling material such as grain sand to a height at which the tip of the pile projects. As a pile used for such artificial grass, for example, a straight monofilament type straight yarn or a split type straight yarn in which a tape-shaped pile is cut (split) is widely used. Are known. And artificial turf is required to have an appearance that gives a soft impression to the viewer, for example, in order to allow athletes to perform bold sliding without being aware of the turf surface. ing.

[0003]

By the way, since the artificial lawn has a pile made of synthetic resin, the surface temperature of the pile rises sharply when it rubs against the skin of the athlete who is sliding, for example. There is a high possibility that the athlete will be burned. To alleviate this problem, the coefficient of friction between the turf surface and the contacted object may be reduced. For example, in order to reduce the true contact area with the skin of the athlete, a multifilament having a plurality of minimum constituent threads. Attempts have been made to use types of straight yarns as piles in artificial grass.

In recent years, for example, an artificial lawn in which only a multifilament type straight yarn is planted in a base fabric (see Japanese Utility Model Laid-Open No. 2-116507: Conventional Example 1).
Artificial lawn in which multiple types of multi-filament type straight yarns with different forms are mixed and planted on a base fabric (Shokai Sho 55
-12811 gazette: Conventional example 2) etc. are proposed.

However, since the multi-filament type straight yarn is composed of the smallest constituent yarn having a small diameter, it has a low uprightness when planted in the base fabric, and is easily fallen (easy to set) due to its own weight or external pressure. have. Therefore, in Conventional Example 1 and Conventional Example 2 described above, in exchange for the effect that the friction coefficient of the turf surface can be reduced, the multifilament type straight yarn is easily fallen down to obtain a good appearance property at the beginning of construction. There is a problem that can not be maintained for a long time.

Such a problem occurs not only in an artificial lawn called a sand-containing artificial lawn in which a filler such as sand grains is filled between the piles but also in an artificial lawn in which the filler is not filled between the piles. The present invention has been made to solve such conventional problems, and an object thereof is to provide an artificial lawn capable of reducing the friction coefficient of the turf surface and maintaining good appearance for a long period of time. is there.

[0007]

The present invention was devised by the present inventors by paying attention to the shape characteristics of a split type straight yarn. That is, in the split type straight yarn, for example, when a cutting process (split process) is randomly performed on a tape-shaped pile, the cutting reaches the end in the longitudinal direction, and the end in the longitudinal direction is finely branched. Therefore, if split type straight yarn is combined with multifilament type straight yarn and mixed and planted in the base fabric, the multifilament type straight yarn can be supported like splint and the contact area with the skin of the athlete who slides. Can be made smaller.

The inventors of the present invention can reduce the friction coefficient of the turf surface and maintain the appearance for a long period of time by mixing a multifilament type straight yarn and a split type straight yarn in an appropriate ratio. It is predicted that both dimensions will be compatible, and a large number of artificial lawns with different mixed plant ratios are constructed on a trial basis to measure the friction coefficient, touch, appearance and durability of the turf one by one, and as a result, the mixed plant ratio is 1: 9 to 8 It was found that an artificial lawn exhibiting a desired effect can be obtained by setting the ratio to 2: 2. Therefore, in order to achieve the above-mentioned object, the invention described in claim 1 of the present invention is a multi-filament type first straight yarn having a plurality of minimum constituent yarns and a split type second straight yarn. It is characterized in that the straight yarn and the base fabric are mixed and planted at a ratio of 1: 9 to 8: 2.

In this case, as the first straight yarn, the height (length) and the diameter of each minimum constituent yarn may be uniform,
Alternatively, they may be different from each other. On the other hand, as the second straight yarn, for example, a tape-shaped, monofilament type, or hollow-shaped pile may be randomly provided with a large number of cuts. The first straight yarn and the second straight yarn may be mixedly planted in the same tuft hole in the base fabric, or only one of them may be planted.

When the first straight yarn and the second straight yarn are mixed in a predetermined tuft hole, they may be mixed in a bundle or they may be mixed in a twisted state. Good. On the other hand, when only the first straight yarns or only the second straight yarns are planted in the predetermined tuft holes, the first straight yarns and the second straight yarns are planted so as to be arranged alternately or randomly. The first straight yarn and the second straight yarn may be 1: 9 to 8: within a certain area.
It only needs to be mixed planted at a ratio of 2.

Further, in the invention described in claim 2, since the filler is filled between the first straight yarn and the second straight yarn, the uprightness of each yarn is increased, The appearance more closely resembles that of a natural lawn can be obtained, and since the filler functions as a cushioning material, the feeling of ground contact is improved. In particular, when sand is used as the filler, the coefficient of friction of the artificial lawn can be further reduced. Further, in the invention described in claim 3, since the minimum constituent yarn is 5 denier to 100 denier and the first straight yarn is 8000 denier or less, low friction can be achieved, and it is suitable. Good touch is obtained with the extremely thin minimum constituent yarn, and the uprightness is obtained with the appropriately thick first straight yarn.

The invention according to claim 4 is characterized in that the second straight yarn is twisted. In this case, the twisting process is a process of twisting (twisting) the second straight yarn to form a substantially propeller-like shape. During the twisting process, the second straight yarn is heated and cooled to produce the second straight yarn. The shape of the straight yarn should not be restored. In the invention described in claim 4, since the second straight yarn is processed into a substantially propeller shape, it is difficult for the second straight yarn to bend and the splint effect with respect to the first straight yarn is improved. further,
Since the notch of the second straight yarn is opened along with the twisting process, the appearance is further improved as compared with the case where the twisting process is not performed.

The invention set forth in claim 5 is characterized in that the first straight yarn and the second straight yarn are twisted together. In this case, as the first straight yarn and the second straight yarn, the number and height (length) of each may be appropriately selected, and the twisted state may be held by heat treatment. In the invention described in claim 5, since the first straight yarn and the second straight yarn are twisted together, the uprightness of the first straight yarn can be further improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment according to the present invention. As shown in FIG. 1 (A), the artificial lawn 10 of the present embodiment is a concrete base material placed on the foundation ground 30 to construct an athletic stadium such as a baseball field or a soccer field. It is laid on 31. In this artificial lawn 10, a first straight yarn 11 and a second straight yarn 12 are mixed and planted in a polypropylene base cloth 13 at a ratio of 1: 9 to 8: 2.
After being laid on the first straight yarn 1, a filler 14 such as sand is filled between the first straight yarn 11 and the second straight yarn 12 by a deck brush.

The first straight yarn 11 is of a multifilament type having a plurality of minimum constituent yarns. The first straight yarn 11 has a minimum constituent yarn of 5 denier to 100 denier.
Is formed to have a diameter of 8,000 denier or less. The diameters of the first straight yarns 11 and the diameters of the minimum constituent yarns may be such that the average value of all the first straight yarns 11 planted in the base cloth 13 is within the range described above,
Alternatively, a plurality of randomly selected first straight yarns 1
The average value of 1 may be within the range described above.

On the other hand, the second straight yarn 12 is shown in FIG.
As shown in (B), the tape-shaped pile is of a split type in which a large number of cuts 13 are randomly provided, and the cuts 13 reach the end in the longitudinal direction, so that the end in the longitudinal direction is finely divided. It is branched. The second straight yarn 12 is twisted so that it is formed into a substantially propeller shape by twisting (twisting) about a line along the longitudinal direction, and heating and cooling are performed in the twisted state. The heat treatment is performed. Therefore, the second straight yarn 12 maintains the state in which it is formed in a substantially propeller shape, and the shape is not restored. The second straight yarn 12 as described above has an improved upstanding property as a result of the twisting process, and the notch 13 is open, and the finely branched longitudinal ends thereof face in various directions, whereby the twisting process is performed. The appearance is more similar to that of a natural lawn compared to the case without it.

The first straight yarn 11 and the second straight yarn
The straight yarns 12 have fillers 14 to 3 at their tips, respectively.
It has a height (length) protruding by mm, and is planted in a bundle in the same tuft hole of the base cloth 13 in a bundled state (FIG. 1).
(A)). The first straight yarn 11 and the second straight yarn
To mix the straight yarns 12 with the base cloth 13,
Only a plurality of the first straight yarns 11 or the second straight yarns 12 may be planted for a specific tuft hole. In this case, the first straight yarns 11 and the second straight yarns 12 may be planted so as to be alternately arranged, or may be planted so as to be randomly arranged, and the first straight yarns 11 and the second straight yarns may be arranged within a certain area. It suffices that the yarns 12 are mixed and planted at a ratio of 1: 9 to 8: 2.

According to the artificial lawn 10 of the present embodiment as described above, the multi-filament type having a plurality of minimum constituent yarns is adopted as the first straight yarn 11 planted in the base cloth 13, The same effect as in the past can be obtained in that the contact area of the sliding athlete with the skin can be reduced, and thus the possibility of burn injury to the athlete can be reduced.

On the other hand, according to the artificial lawn 10 of this embodiment,
Since the first straight yarn 11 and the split type second straight yarn 12 are mixed and planted in the base fabric 13 at a ratio of 1: 9 to 8: 2, the second straight yarn 12 has a relatively low uprightness. The conventional problem that the appearance of the turf surface is deteriorated can be solved by supporting the straight yarn 11 like a splint, and the first straight yarn 11 easily falling (declining) due to its own weight or external pressure. In particular, since the second straight yarn 12 has a tape-shaped pile that is randomly cut and split (split), its longitudinal ends are finely branched. For example, in comparison with a straight filament of the curl filament type. , It is possible to further reduce the contact area of the sliding athlete with the skin.

Further, in this embodiment, the first straight yarn 1
Since the filling material 14 is filled between the first and second straight yarns 12, the appearance that more closely resembles that of natural grass is obtained, and the filling material 14 functions as a cushioning material to improve the touch feeling. Furthermore, the second straight yarn 12 is
Since the minimum constituent yarn is appropriately thin 5 denier to 100 denier, low friction can be achieved, good touch can be obtained, and the first straight yarn 12 is appropriately thick 8
Since it is 000 denier or less, sufficient upstanding property can be obtained. In the artificial grass 10 of this embodiment, since the second straight yarn 12 is twisted, bending and the like are less likely to occur, and the effect of splinting on the first straight yarn 11 is further improved. Also, the second straight yarn 12
Since the notch 13 opens with the twisting process, the appearance is further improved as compared with the case where the twisting process is not performed.

FIG. 2 shows a second embodiment according to the present invention. In the embodiments described below, the members already described in the first embodiment are designated by the same reference numerals in the drawings to simplify or omit the description.
As shown in FIG. 2 (A), the artificial grass 2 in this embodiment
0 is the first straight yarn 11 and the second straight yarn 1
Two are twisted together.

As shown in FIG. 2 (B), the first straight yarn 11 and the second straight yarn 12 are twisted in a state in which a plurality of first straight yarns 11 and one second straight yarn 12 are bundled. In addition to being processed, a heat treatment of heating and cooling in the twisted state is performed. Therefore, the first straight yarn 11 and the second straight yarn 12 maintain the state in which they are twisted with each other and do not separate from each other. The first straight yarn 11 and the second straight yarn 12 are mixed and planted in the same tuft hole of the base fabric 13 at a ratio of 1: 9 to 8: 2 (see FIG. 2 (B)).

According to the artificial grass 20 of the present embodiment as described above, the first straight yarn 11 and the second straight yarn 1
Since 2 is mixedly planted in the base cloth 13 at a ratio of 1: 9 to 8: 2, the same effect as the artificial grass 10 of the first embodiment described above can be obtained. On the other hand, according to the artificial lawn 20 of the present embodiment, the first straight yarn 11 and the second straight yarn 12
Are twisted with each other, the uprightness of the first straight yarn 11 is further improved, whereby the appearance of the turf surface can be favorably maintained for a long period of time.

[0024]

EXAMPLES Next, a mixed planting ratio of the first straight yarn 11 and the second straight yarn 12, presence / absence of the filler 14, diameters of the first straight yarn 11 and the minimum constituent yarn, presence / absence of twisting of the second straight yarn 12 , First straight yarn 11 and second
The artificial lawn 10 was actually constructed by changing the presence or absence of twisting with the straight yarn 12, and the friction amount, touch, appearance and durability of the turf surface were measured, investigated and evaluated. This will be explained together with an example.

[0025]

[Table 1]

As the friction amount, the grass surface was compressed 10,000 times with a predetermined compacting machine after the artificial grass 10 was constructed, and then the skit resistance value was measured by the skit resistance test. Therefore, the amount of friction is
The smaller the value, the better. In addition, the evaluation of the skin feel is similar to the feeling when sliding on a natural grass, and the feeling when multiple outdoor athletes slide on an artificial grass is ◎. The average of four grades was evaluated as “good”, “fair” and “bad”.

Further, in the evaluation of the appearance, a plurality of outdoor athletes observe the condition of the grass surface, and the appearance is similar to that of a natural lawn. It is the average of four grades, which is "OK" and "NG".
Then, as the evaluation of durability, after the grass surface was compressed 10,000 times by a compaction machine, the above-mentioned plurality of outdoor athletes observed the collapse (sagging) of the first straight yarn 11 and the second straight yarn 12. , ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ ∘

When the first straight yarn 11 and the second straight yarn 12 are used in each example and each comparative example, the base fabric 13 is tufted with 5/32 gauge, 3 stitches, and each comparative example. In the case of using only the first straight yarn 11 or only the second straight yarn 12 in (1), the fabric 13 was tufted with 5/32 gauge and 3 stitches.

(Embodiment 1) A first straight yarn 11 and a split type second straight yarn 12 formed to have a thickness of 3000 denier by a minimum constituent yarn having a thickness of 4 denier.
And were mixed and planted on the base cloth 13 at a ratio of 50:50. As a result, the amount of friction was 6, and the touch and appearance were evaluated as ⊚, and the durability was evaluated as ∘. (Example 2) First straight yarn 11 formed to have a thickness of 9000 denier by the minimum constituent yarn having a thickness of 25 denier
And the split type second straight thread 12
The base cloth 13 was mixed and planted at a ratio of 0:50. As a result, the friction amount was 6, the touch and the appearance were evaluated as ○, and the durability was ◎ to ○.
It became an evaluation.

(Embodiment 3) A first straight yarn 11 formed to have a thickness of 3300 denier by a minimum constituent yarn having a thickness of 110 denier and a second straight yarn 12 of a split type have a base fabric ratio of 50:50. 13 mixed plants. As a result, the amount of friction was 10, the touch was evaluated as ◯, and the appearance and durability were evaluated as ⊚. (Example 4) The first straight yarn 11 formed to have a thickness of 3000 denier by the minimum constituent yarn having a thickness of 25 denier
And the split type second straight thread 12
The base cloth 13 was mixed and planted at a ratio of 1:89. As a result, the friction amount was 8, the touch was evaluated as ○, the appearance was evaluated as ◎, and the durability was evaluated as ◎ to
○ It was evaluated.

(Embodiment 5) A first straight yarn 11 formed into a thickness of 3000 denier by a minimum constituent yarn having a thickness of 25 denier, and a split type second straight yarn 1
2 and 78 were mixed and planted on the base cloth 13 at a ratio of 78:22. As a result, the amount of friction was 3, and the touch and appearance were evaluated as ⊚, and the durability was evaluated as ◯ to Δ. (Example 6) First straight yarn 11 formed to a thickness of 3000 denier by the minimum constituent yarn having a thickness of 25 denier
And the split type second straight thread 12
The base cloth 13 was mixed and planted at a ratio of 0:50. As a result of filling the filler 14 between the first straight yarn 11 and the second straight yarn 12, the friction amount was 5, the touch was evaluated as o, and the appearance and durability were evaluated as o.

(Embodiment 7) A first straight yarn 11 formed to have a thickness of 1250 denier by a minimum constituent yarn having a thickness of 25 denier and a second straight yarn 1 of a split type.
2 and 50 were mixed and planted on the base cloth 13 at a ratio of 50:50. As a result of filling the filler 14 between the first straight yarn 11 and the second straight yarn 12, the friction amount is 4 and the touch is excellent.
∘ ○, appearance and durability were rated ⊚. (Embodiment 8) First straight yarn 11 formed to have a thickness of 1250 denier by the minimum constituent yarn having a thickness of 25 denier
And a second straight yarn 12 which was twisted and heat-treated in a split type were mixed and planted in a base cloth 13 at a ratio of 50:50. As a result, the friction amount was 4, the touch was evaluated as ⊚, and the appearance and durability were evaluated as ∘ to ∘.

(Embodiment 9) A first straight yarn 11 formed to have a thickness of 1250 denier by a minimum constituent yarn having a thickness of 25 denier, and a second straight yarn 12 of a split type which has been twisted and heat-treated. The base cloth 13 was mixed and planted at a ratio of 50:50. As a result of filling the filler 14 between the first straight yarn 11 and the second straight yarn 12, the friction amount was 3, the touch was evaluated as ⊚, the appearance was evaluated as ⊚ to ○, and the durability was evaluated as ⊚. (Example 10) First straight yarn 11 formed to have a thickness of 1250 denier by the minimum constituent yarn having a thickness of 25 denier
And the split type second straight yarn 12 that has been twisted and heat treated with the first straight yarn 11
The base cloth 13 was mixed and planted at a ratio of 0:50. As a result, the friction amount was 4, the touch and the appearance were evaluated as ◎, and the durability was ◎ to ○.
It became an evaluation.

(Example 11) A first straight yarn 11 formed to have a thickness of 1250 denier by a minimum constituent yarn having a thickness of 25 denier and a first straight yarn 11 of a split type were twisted and heat-treated. The second straight yarn 12 was mixed and planted in the base fabric 13 at a ratio of 50:50. These first straight yarn 11 and second straight yarn 12
As a result of filling the filling material 14 between them, the friction amount is 2, and
The appearance and durability were rated as ⊚. (Example 12) First straight yarn 11 formed to a thickness of 3000 denier by a minimum constituent yarn having a thickness of 25 denier
And the split type second straight thread 12
The base cloth 13 was mixed and planted at a ratio of 1:89. As a result of filling the filler 14 between the first straight yarn 11 and the second straight yarn 12, the friction amount was 7, the touch and the appearance were evaluated as ◯, and the durability was evaluated as ⊚ to ○.

(Comparative Example 1) Only the first straight yarn 11 formed to have a thickness of 1250 denier by the minimum constituent yarn having a thickness of 25 denier was planted on the base cloth 13. As a result of filling the filler 14 between the first straight yarns 11, the friction amount was 6, the touch was evaluated as o, the appearance was evaluated as Δ, and the durability was evaluated as x. (Comparative Example 2) Split type second straight yarn 12
Only the base cloth 13 was planted. This second straight thread 12
As a result of filling the filler 14 between them, the friction amount was 15, the touch and the appearance were evaluated as x, and the durability was evaluated as ⊚-∘.

(Comparative Example 3) The first straight yarn 11 formed to have a thickness of 1250 denier by the minimum constituent yarn having a thickness of 25 denier and the second straight yarn 1 of the split type.
2 and 8 were mixed and planted on the base cloth 13 at a ratio of 8:92. As a result of filling the filler 14 between the first straight yarn 11 and the second straight yarn 12, the friction amount is 12, and the touch is good.
The evaluation and appearance were evaluated as △, and the durability was evaluated as ◎. (Comparative Example 4) First straight yarn 11 formed to have a thickness of 1250 denier by the minimum constituent yarn having a thickness of 25 denier
And the split type second straight thread 12
The base cloth 13 was mixed and planted at a ratio of 6:14. As a result of filling the filler 14 between the first straight yarn 11 and the second straight yarn 12, the friction amount was 8, the touch was evaluated as ⊚ to ○, the appearance was evaluated as Δ, and the durability was evaluated as Δ to ×. It was

From the above evaluation, it can be seen that each example can reduce the coefficient of friction of the turf surface and can obtain good touch, appearance and durability as compared with each comparative example. Especially,
Comparing Examples 1 to 11 with Comparative Examples 3 and 4, in Examples 1 to 11, the ratio of the first straight yarn 11 and the second straight yarn 12 is 1: 9 to 8: 2. It can be seen that, since the plants are mixed with each other, the friction amount is remarkably reduced and good appearance can be obtained.

In the sixth embodiment, the first straight yarn 11
Since the filler 14 is filled between the second straight yarn 12 and the second straight yarn 12, it can be seen that the friction amount can be reduced while maintaining good appearance and durability as compared with Example 3. Further, in the seventh embodiment, the first straight yarn 11 is made of 80 by the minimum constituent yarn of 5 denier to 100 denier.
It can be seen that all evaluations are improved as compared with Example 2 because the film is formed to have a denier of 00 or less.

The eighth and ninth embodiments are the second one.
It can be seen that since the straight yarn 12 is twisted, the friction amount is reduced and the touch is improved. On the other hand, in Example 10 and Example 11, since the first straight yarn 11 and the second straight yarn 12 are twisted together, all the evaluations are remarkably good in comparison with each comparative example. I understand.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but is improved within a range in which the present invention can be achieved.
Modifications and the like are included in the present invention. For example, in the above-described first embodiment, the first straight yarn and the second straight yarn are bundled in a plurality, and they are planted in the same tuft hole. However, the first straight yarn and the second straight yarn are separately provided. Any number of tuft holes may be planted in individual tuft holes. In short, if the first straight yarn and the second straight yarn are mixed and planted in a ratio of 1: 9 to 8: 2 within a certain area, the planting form is It is optional.

On the other hand, in the above-described second embodiment, the twisting process is performed in a state where the plurality of first straight yarns and one of the second straight yarns are bundled, but a plurality of second straight yarns are used for twisting. Twisting may be performed with the first straight yarn sandwiched. Further, the present invention can be applied to an artificial lawn in which a filler is not filled between the first straight yarn and the second straight yarn, and can also be applied to various stadiums other than a baseball field and a soccer field. In addition, the material, shape, size, form, number, location, molding method, processing method, etc. of the first straight yarn, the second straight yarn, and the base fabric shown in each of the above-mentioned embodiments can achieve the present invention. It is optional and not limiting.

[0042]

According to the invention described in claim 1 of the present invention, the first straight yarn and the second straight yarn are 1: 9.
Since it is mixedly planted at a ratio of 8: 2, the coefficient of friction of the turf surface can be reduced and good appearance can be maintained for a long time. According to the invention described in claim 2, the first
Since the filler is filled between the straight yarn and the second straight yarn, the uprightness of each yarn is increased, the appearance more similar to that of natural grass is obtained, and the filler functions as a cushioning material to provide a ground feeling. Is improved. Further, according to the invention described in claim 3, since the first straight yarn is formed to be 8000 denier or less by the minimum thinning yarn having an appropriate thinness of 5 denier to 100 denier, good touch and standing property can be obtained. To be

According to the invention described in claim 4,
The second straight yarn is less likely to bend due to the twisting process, the splint effect on the first straight yarn is improved, and the appearance is further improved by opening the notch. On the other hand, according to the invention described in claim 5, since the first straight yarn and the second straight yarn are twisted together, the uprightness of the first straight yarn can be further improved.

[Brief description of drawings]

FIG. 1 is a schematic sectional view and a schematic perspective view showing a first embodiment of the present invention.

FIG. 2 is a schematic sectional view and a schematic perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

 10,20 Artificial grass 11 First straight yarn 12 Second straight yarn 13 Base cloth 14 Filler

Front page continuation (72) Inventor Hiroshi Hasegawa 3-20-1 Jonan-cho, Shikima-ku, Himeji-shi, Hyogo Prefecture (72) Inventor Masakazu Tanaka 1 41-shimizu, Uozumi-cho, Akashi-shi, Hyogo Sumitomo Gomyozumi Dormitory

Claims (5)

[Claims] 1. A multifilament-type first straight yarn having a plurality of minimum constituent yarns and a split-type second straight yarn having a notch process in a ratio of 1: 9 to 8: 2 on a base fabric. An artificial lawn characterized by being mixedly planted. 2. The artificial lawn according to claim 1, wherein a filler is filled between the first straight yarn and the second straight yarn. 3. The minimum constituent yarn is 5 denier to 10
The denier is 0 and the first straight yarn is 8
The artificial lawn according to claim 1, which has a denier of 000 or less. 4. The artificial lawn according to claim 1, wherein the second straight yarn is twisted. 5. The artificial lawn according to claim 1, wherein the first straight yarn and the second straight yarn are twisted with each other.