Artificial lawn
阅读说明:本技术 人造草坪 (Artificial lawn ) 是由 黄世俊 金钟必 权宁薰 裴起太 于 2018-07-23 设计创作,主要内容包括:本发明涉及一种人造草坪。上述人造草坪包括基层;缓冲层,位于基层下方并由单纤维无纺布构成;草苗单元,穿透基层并植入缓冲层,上述草苗单元的一端向上述基层的上方向延伸,上述草苗单元的另一端位于所述缓冲层的底面;以及背胶层,与上述缓冲层的底面和上述草苗单元的另一端接触并由长纤维无纺布制成。在这种情况下,缓冲层的至少一部分穿透基层并位于基层的上表面,以形成孔隙。(The invention relates to an artificial lawn. The artificial lawn comprises a base layer; the buffer layer is positioned below the base layer and is formed by single-fiber non-woven fabrics; the grass seedling unit penetrates through the base layer and is implanted into the buffer layer, one end of the grass seedling unit extends upwards from the base layer, and the other end of the grass seedling unit is positioned on the bottom surface of the buffer layer; and a gum layer which is in contact with the bottom surface of the buffer layer and the other end of the grass seedling unit and is made of long fiber non-woven fabric. In this case, at least a portion of the buffer layer penetrates the base layer and is positioned on the upper surface of the base layer to form pores.)
1. An artificial lawn, comprising:
a base layer;
a buffer layer which is arranged below the base layer and is composed of single fiber non-woven fabrics;
the grass seedling unit penetrates through the base layer and is implanted into the buffer layer, one end of the grass seedling unit extends upwards from the base layer, and the other end of the grass seedling unit is positioned on the bottom surface of the buffer layer; and
and the back glue layer is in contact with the bottom surface of the buffer layer and the other end of the grass seedling unit and is made of long fiber non-woven fabric, and at least one part of the buffer layer penetrates through the base layer and is positioned on the upper surface of the base layer to form pores.
2. An artificial lawn according to claim 1, wherein said cushioning layer comprises a first fabric and a second fabric having different melting points.
3. An artificial lawn according to claim 2, wherein said first textile has a melting point of between 120 ℃ and 150 ℃ and said second textile has a melting point of between 200 ℃ and 260 ℃.
4. An artificial lawn according to claim 2, wherein the mixing ratio of the first fabric and the second fabric is 10 to 50: 50-90.
5. The artificial lawn of claim 1, wherein said grass measure unit includes a first woven fabric having a low melting point and a second woven fabric having a high melting point, said grass measure unit is combined with said grass measure unit by mixing and solidifying said grass measure unit with said first woven fabric having a low melting point, and said grass measure unit has a pull-off strength of more than 80N.
6. An artificial lawn according to claim 5, wherein said first fabric having a low melting point covers the other end of said grass elements.
7. An artificial lawn according to claim 1, characterised in that the damping layer is made of polypropylene or polyester.
8. An artificial lawn according to claim 1, wherein the thickness of the cushioning layer is 1mm to 3mm, and the thickness of the back adhesive layer is 0.1mm to 0.4 mm.
9. An artificial lawn according to claim 8, wherein if the adhesive is applied to the underside of the backing layer, the adhesive penetrates both said backing layer and said cushioning layer.
10. The artificial lawn of claim 1, wherein the adhesive layer and the other end of the grass seedling unit are bonded by melting, mixing and curing, and the adhesive layer has a peel strength of more than 90N.
11. An artificial lawn as claimed in claim 1, wherein said backing layer is made of polypropylene or polyester.
12. The artificial lawn of claim 1, wherein the cushion layer includes a core and a sheath covering the core, and is formed by sheath-core composite spinning, and the sheath has a melting point lower than that of the core.
13. An artificial lawn according to claim 12, wherein said sheaths and the other ends of said grass elements are bonded by melting, intermixing and solidifying.
14. An artificial lawn according to claim 12, wherein said core is made of polypropylene or polyester and said sheath is made of polyethylene or polypropylene.
15. An artificial lawn as claimed in claim 1, wherein said base layer and said grass elements are not fusion bonded to each other by a portion of said grass elements penetrating through said base layer, and the upper surface of said back adhesive layer, the bottom surface of said base layer and the other ends of said grass elements are bonded by melting, mixing and solidifying with each other.
16. The artificial lawn of claim 1, wherein said cushioning layer and said adhesive backing layer contain moisture, and wherein at least a portion of said cushioning layer penetrates said substrate layer to evaporate moisture toward one end of said seedling elements to lower the surface of one end of said seedling elements.
17. An artificial lawn as claimed in claim 1, wherein at least a part of the cushion layer on the upper surface of the base layer has a dot-like structure, and the at least a part of the cushion layer is spread after the monofilament nonwoven fabric is unwound.
18. An artificial lawn as claimed in claim 1, further comprising a liquid synthetic resin adhesive applied to said backing layer, wherein said synthetic resin adhesive increases the stiffness of said base layer and said backing layer.
19. An artificial lawn as claimed in claim 1, wherein the base layer has a permeability of 12 to 15cc/cm2A permeability of the buffer layer is 290 to 300cc/cm2Sec, the permeability of the back adhesive layer is 340-350 cc/cm2/sec。
20. The artificial lawn of claim 1, wherein the base layer, the cushion layer and the back adhesive layer are bonded to each other and have a permeability of 55 to 65cc/cm2/sec。
21. An artificial lawn, characterized by comprising:
a base layer;
the buffer layer is positioned below the base layer and is formed by single-fiber non-woven fabrics;
the grass seedling unit penetrates through the base layer and is implanted into the buffer layer, one end of the grass seedling unit extends upwards from the base layer, and the other end of the grass seedling unit is positioned on the bottom surface of the buffer layer; and
and a back glue layer which is contacted with the bottom surface of the buffer layer and the other end of the grass seedling unit and is made of long fiber non-woven fabrics, wherein the buffer layer is made of lattice fabrics and has permeability.
Technical Field
The invention relates to an artificial lawn, in particular to an artificial lawn with good drainage, high peel strength and low surface temperature.
Background
Generally, the artificial turf can keep the inherent color, is not limited by environmental conditions, and is easy to control after construction. Artificial turf is more costly than natural turf, but is preferred because it can be used semi-permanently, is easy to maintain and manage, and has a conformable surface suitable for exercise.
These artificial lawns include a plurality of grass filaments having a length of about 20mm to about 70mm fixed to a base, and a backing layer bonded to the base so that the grass filaments are not separated from the base.
An artificial turf is installed on a ground formed of stone chips, pebbles, etc. In order to be able to drain water, the lawn has a base and a backing layer with drainage holes. However, in order to cushion, silica, an elastic body, or the like is attached to the lawn, and these members block the drainage hole.
Disclosure of Invention
Technical problem
Accordingly, an object of the present invention is to provide an artificial turf construction technique for improving drainage conditions, reducing surface temperature, and improving peel strength.
Means for solving the problems
Accordingly, an object of the present invention is to provide an artificial turf construction technique for improving drainage conditions, reducing surface temperature, and improving peel strength.
According to an embodiment of the present invention, there is provided an artificial lawn, including a base layer; a buffer layer which is arranged below the base layer and is composed of single fiber non-woven fabrics; the grass seedling unit penetrates through the base layer and is implanted into the buffer layer, one end of the grass seedling unit extends upwards from the base layer, and the other end of the grass seedling unit is positioned on the bottom surface of the buffer layer; and a back glue layer which is contacted with the bottom surface of the buffer layer and the other end of the grass seedling unit and is made of long fiber non-woven fabric, wherein at least one part of the buffer layer penetrates through the base layer and is positioned on the upper surface of the base layer to form pores.
According to an embodiment of the present invention, the buffer layer includes a first fabric and a second fabric having different melting points.
According to an embodiment of the present invention, the melting point of the first fabric is between 120 ℃ and 150 ℃, and the melting point of the second fabric is between 200 ℃ and 260 ℃.
According to an embodiment of the present invention, a mixing ratio of the first fabric and the second fabric is 10 to 50: 50-90 (by weight).
According to an embodiment of the present invention, the buffer layer includes the first woven fabric having a low melting point and the second woven fabric having a high melting point, the buffer layer, the first woven fabric having a low melting point, and the other end of the seedling unit are combined by being mixed and solidified with each other, and the pull-off strength of the buffer layer exceeds 80N.
According to an embodiment of the present invention, the first fabric having a low melting point covers the other end of the grass seedling unit.
According to an embodiment of the present invention, the buffer layer is made of polypropylene or polyester.
According to the embodiment of the invention, the thickness of the buffer layer is 1 mm-3 mm, and the thickness of the gum layer is 0.1 mm-0.4 mm.
According to the embodiment of the present invention, if the adhesive is coated on the bottom surface of the back adhesive layer, the adhesive penetrates through the back adhesive layer and the buffer layer.
According to the embodiment of the invention, the gum layer and the other end of the grass seedling unit are combined through melting, mixing and curing, and the peel strength of the gum layer exceeds 90N.
According to an embodiment of the present invention, the above-mentioned back adhesive layer is made of polypropylene or polyester.
According to the embodiment of the present invention, the cushioning layer includes a core and a sheath covering the core, which are formed by sheath-core composite spinning, and the melting point of the sheath is lower than that of the core.
According to the embodiment of the invention, the sheath and the other end of the grass seedling unit are combined through melting, mutual mixing and solidification.
According to an embodiment of the invention, said core is made of polypropylene or polyester and said sheath is made of polyethylene or polypropylene.
According to an embodiment of the present invention, the base layer and the cushion layer are not fused and bonded to each other by a portion of the cushion layer penetrating the base layer, and the upper surface of the back adhesive layer, the bottom surface of the base layer, and the other end of the seedling unit are bonded by fusing, mixing with each other, and solidifying.
According to the embodiment of the invention, the buffer layer and the gum layer contain moisture, and the moisture is evaporated to one end of the grass seedling unit by penetrating at least a part of the buffer layer through the base layer so as to reduce the surface of one end of the grass seedling unit.
According to the embodiment of the invention, at least one part of the buffer layer positioned on the upper surface of the base layer is in a dot structure, and the single fiber non-woven fabric is disentangled.
According to an embodiment of the present invention, the adhesive further comprises a liquid synthetic resin adhesive coated on the above-mentioned back adhesive layer. In this case, the synthetic resin adhesive enhances the rigidity of the base layer and the back adhesive layer.
According to the embodiment of the invention, the permeability of the base layer is 12-15 cc/cm2A permeability of the buffer layer is 290 to 300cc/cm2Sec, the permeability of the back adhesive layer is 340-350 cc/cm2/sec。
According to the embodiment of the present invention, the base layer, the cushion layer and the back adhesive layer are combined with each other, and the permeability thereof is 55 to 65cc/cm2/sec。
According to an embodiment of the present invention, there is provided an artificial lawn, including a base layer; the buffer layer is positioned below the base layer and is formed by single-fiber non-woven fabrics; the grass seedling unit penetrates through the base layer and is implanted into the buffer layer, one end of the grass seedling unit extends upwards from the base layer, and the other end of the grass seedling unit is positioned on the bottom surface of the buffer layer; and a back glue layer which is contacted with the bottom surface of the buffer layer and the other end of the grass seedling unit and is made of long fiber non-woven fabric, wherein the buffer layer is made of lattice fabric and has permeability.
The above summary of the invention is intended to be illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the embodiment of the invention, the back adhesive layer is made of non-woven fabric and is used for fixing the buffer layer, and the buffer layer is connected to the base layer and the grass seedling units paved on the buffer layer. Therefore, the artificial turf according to the present invention has high weatherability and durability, reduces temperature by hygroscopicity and permeability in terms of outdoor temperature variation, improves permeability and dimensional stability, and thus has strong fluid absorption and discharge capacity, and antistatic property.
According to the embodiment of the invention, under the condition that the buffer layer and the gum layer absorb the fluid, if the temperature of one end of the grass seedling unit is higher than the temperature of the buffer layer and the gum layer, the fluid of the gum layer and the buffer layer can be evaporated through the exposed part above the base layer. The evaporating fluid lowers the surface temperature of one end of the grass element to control the surface temperature of the artificial turf, so that the temperature of the artificial turf is lowered.
According to the embodiment of the present invention, the base layer and the cushion layer are strongly bonded by the exposed portions and the grass elements penetrating the base layer. Therefore, an adhesive is not required, thereby reducing the manufacturing cost and preventing environmental pollution.
According to the embodiment of the invention, the first fabric of the buffer layer, the other end of the grass seedling unit and the long fiber of the back glue layer are melted, solidified and combined. Therefore, the incorporation of the artificial turf is increased to have high pull-off strength. The adhesive penetrates the buffer layer to improve the peeling strength after construction.
According to an embodiment of the invention, the gum layer, the breaker layer, the base layer and the grass seedling units are made of the same material with the same properties, such as polypropylene or polyester, recyclable resin, and no separation process is required after collection. Therefore, when the artificial turf is replaced, the amount of waste can be greatly reduced, and the environmental pollution caused by waste disposal can be prevented.
All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims which follow.
Drawings
Fig. 1 is a schematic view illustrating the artificial lawn according to an embodiment of the present invention;
FIG. 2 is a perspective view showing the separation of the backsize layer and the cushion layer of FIG. 1;
FIG. 3 is an expanded cross-sectional view of A in FIG. 1;
FIG. 4 is a photograph of the artificial turf of FIG. 1;
FIGS. 5-9 are analytical curves of buffer layer heat flow;
FIG. 10 is a schematic view showing a buffer jacket-core;
fig. 11 is a schematic view showing the artificial turf attached to the ground of fig. 1.
Detailed Description
Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. In describing the present invention, a detailed description of related known functions or configurations is omitted to avoid making the basic subject matter of the present invention difficult to understand.
The terms "about," "substantially," and the like as used herein are intended to leave some leeway from a mathematical accuracy standpoint, to take into account tolerances acceptable in the industry, and to prevent any non-responsible offenders from over utilizing the present disclosure, where precise or absolute numerical values are given to aid in understanding the present invention.
The term "fabric" as used herein is intended to encompass woven or knitted articles, nonwoven fabrics, webs, and the like.
Hereinafter, an artificial lawn according to an embodiment of the present invention will be described with reference to fig. 1 to 4.
Fig. 1 is a schematic view illustrating the artificial lawn according to an embodiment of the present invention. Figure 2 is a perspective view showing the separation of the backsize layer and the cushion layer of figure 1. Fig. 3 is an expanded sectional view of a in fig. 1. Fig. 4 is a photograph of the artificial turf of fig. 1.
Referring to fig. 1 to 4, an
The
The
The
The
The
At least a portion of cushioning layer 30 (hereinafter referred to as "exposed portion 31") penetrates
Meanwhile, the
The
If the melting point of the first fibers is less than 120 c, dimensional stability may be degraded when the
Since the first fabric is melted at a temperature of 120 to 150 ℃, the amount of melting energy used and the amount of carbon dioxide generated may be reduced. The second fabric is made of a moisture absorption material, can be cooled, and has the functions of mite prevention and antibiosis.
The first fabric covers the other ends of the
The mixing ratio of the first and second fabrics may be 10 to 50: 50 to 90 by weight. In this case, if the first fabric is less than 10 and the second fabric exceeds 90, the adhesive strength of the back
Meanwhile, the ratio of the first fabric and the second fabric may be 1: 4.1 to 7.0. In this case, the first fabric has a heat of fusion value of 134J/g to 215J/g as measured by DSC (differential scanning calorimetry) and the second fabric has a heat of fusion value of 757J/g to 932J/g as measured by DSC (differential scanning calorimetry).
The melting heat value ratios of the first and second fabrics are shown in table 1 below.
[ Table 1]
If the ratio of the first and second fabrics is 1: 4.5, the first fabric had a heat of fusion of 167J/g at 129 ℃ and the second fabric had a heat of fusion of 757J/g at 254 ℃ (see FIG. 5).
If the ratio of the first and second fabrics is 1: 5.8, the first fabric had a heat of fusion of 156J/g at 129 ℃ and the second fabric had a heat of fusion of 910J/g at 252 ℃ (see FIG. 6).
If the ratio of the first and second fabrics is 1: 7.0, the first fabric has a heat of fusion of 134J/g at 128 ℃ and the second fabric has a heat of fusion of 932J/g at 253 ℃ (see FIG. 7).
If the ratio of the first and second fabrics is 1: 4.1, the first fabric had a heat of fusion of 215J/g at 128 ℃ and the second fabric had a heat of fusion of 872J/g at 253 ℃ (see FIG. 8).
If the ratio of the first and second fabrics is 1: 4.6, the first fabric had a heat of fusion of 179J/g at 129 ℃ and the second fabric had a heat of fusion of 823J/g at 253 ℃ (see FIG. 9).
The results show that there is a difference in melting heat value depending on the ratio of the first fabric and the second fabric. From the difference in the heat of fusion values, the ratio of the first and second fabrics can be determined.
Meanwhile, the
The conjugate fiber includes a first fabric having a high melting point and a second fabric having a low melting point. The
Further, the
The
The
The long fibers of the
Since the back
The permeability of the back
In order to increase the rigidity of the
The artificial turf will be described in more detail below.
If the
The first fabric of the
Referring to fig. 11, the rolled artificial turf having a predetermined length and width is provided in a rolled state for ground installation. In this case, in order to fix the artificial turf on the ground, the adhesive 100 needs to be applied to the floor panel. The back
When rainwater (fluid) drops on the artificial lawn, the fluid may be absorbed to the
Under the condition that the
In this
Also, since the back
Referring to fig. 1 to 11, other embodiments of the present invention mainly employ the elements of the above embodiments. However, in this embodiment, the cushioning layer may form an integral network structure in which the warp and weft yarns form a lattice-like form. The fineness of the warp yarns is 600-1000 denier, and the fineness of the weft yarns is 1400-2000 denier. The density of the warp yarn is 2/cm-4/cm, and the density of the weft yarn is 2/cm-4/cm. If the density of the warp and weft yarns exceeds 4/cm, permeability may be reduced. In this case, the overall network structure of the buffer layer may improve permeability. Due to the improvement of the permeability, the air flow is improved, and the absorption and vaporization efficiency of the fluid is improved, so that the surface temperature of the artificial turf is effectively controlled. In addition to the buffer layer, other elements of the embodiment are applicable according to fig. 1 to 11.
Experimental example 1: base layer Permeability (by weight) ]
Example 1
100g/m2The base layer of (2) is made of polypropylene yarn, and a knitted fabric structure is formed. In this case, the fineness of the warp yarns of the knitted fabric is 300-500 denier, and the fineness of the weft yarns of the knitted fabric is 1000-1400 denier. The density of the warp yarn of the knitted fabric is 90/cm-130/cm, and the density of the weft yarn of the knitted fabric is 50/cm-70/cm.
Comparative example 1
75g/m2The base layer was formed in the same manner as in example 1.
Comparative example 2
125g/m2The base layer was formed in the same manner as in example 1.
The base layer permeabilities obtained from example 1 and comparative examples 1 and 2 were evaluated under the conditions of 20c and 1 standard atmospheric pressure, and the results are shown in table 2 below.
[ Table 2]
As shown in example 1, 100g/m2The permeability of the base layer was 20cc/cm2And/sec. However, in comparative example 1, 75g/m was compared with example 12The permeability of the base layer is high but the dimensional stability is insufficient. In comparative example 2, 125g/m was compared with example 12The permeability of the base layer is low. Preferably, the permeability of the base layer is 15cc/cm2/sec~25cc/cm2Sec, and 20cc/cm in example 12And/sec. The results show that the base layers of comparative examples 1 and 2 did not reach the permeability and thus are not suitable.
[ Experimental example 2: permeability (by buffer layer weight) ]
Example 2
The fiber length, the crimpness and the fineness of the buffer layer are respectively 50mm, 20 percent and 3-3 denier. Preparing a non-woven fabric with a thickness of 3mm by using the first fabric with a high melting point and the second fabric with a low melting point, and preparing the non-woven fabric into a gram per meter2A buffer layer. The first and second fabrics are staple fibers.
Comparative example 3
75g/m2Forming mode of buffer layerSame as in example 2.
Comparative example 4
165g/m2The buffer layer was molded in the same manner as in example 2.
The permeability of the buffer layers obtained from example 2 and comparative examples 3 and 4 was evaluated under the conditions of 20c and 1 standard atmospheric pressure, and the results are shown in table 3 below.
[ Table 3]
120g/m as shown in example 22The permeability of the buffer layer was 295cc/cm2And/sec. However, in comparative example 3, 75g/m was compared with example 22The permeability of the buffer layer is high, but the durability of the buffer layer is decreased. In comparative example 3, 165g/m, compared with example 22The buffer layer has a lower permeability and reduces the air flow.
Preferably, the buffer layer has a permeability of 240cc/cm2/sec~350cc/cm2Sec, and 295cc/cm in example 22And/sec. The results show that the buffer layers of comparative examples 3 and 4 did not reach the permeability and thus are not suitable.
[ Experimental example 3: permeability (by weight of the backing layer)
Example 3
Nonwoven fabric having a thickness of 0.4mm and made of long fibers of polypropylene, polyester, etc. was used to prepare a nonwoven fabric having a thickness of 50g/m2A back glue layer.
Comparative example 5
25g/m2The back adhesive layer was formed in the same manner as in example 3.
Comparative example 6
75g/m2The back adhesive layer was formed in the same manner as in example 3.
The permeation rates of the backsize layers obtained from example 3 and comparative examples 5 and 6 were evaluated under the conditions of 20c and 1 standard atmospheric pressure, and the results are shown in table 4 below.
[ Table 4]
50g/m as shown in example 32The permeability of the back adhesive layer is 3455cc/cm2And/sec. However, in comparative example 5, 25g/m was compared with example 32The permeability of the back adhesive layer is high, but the durability of the back adhesive layer is reduced. In comparative example 6, 75g/m, compared with example 32The permeability of the back glue layer is low, and the air flow is reduced.
Preferably, the back adhesive layer has a permeability of 330cc/cm2/sec~360cc/cm2Sec, and 345cc/cm in example 32And/sec. The results showed that the back adhesive layers of comparative examples 5 and 6 did not reach the permeability and thus were not suitable.
[ Experimental example 4: permeability, drainage and pull-off strength of artificial turf ]
Example 4
The base layer made of knitted fabric and the cushioning layer made of short fiber made of high melting point first fabric and low melting point second fabric are combined with the back adhesive layer made of long fiber to make 250g/m2An artificial lawn. In this case, the first fabric and the second fabric are bonded via melting.
Comparative example 7
The grass filaments are implanted into the base layer, and the base layer is coated with styrene butadiene rubber so as to prevent the grass filaments from being separated, thereby manufacturing the artificial lawn.
Comparative example 8
The grass filaments are implanted into the base layer, and the base layer is combined with the back glue layer made of the polyethylene film so as to prevent the grass filaments from being separated, thereby manufacturing the artificial lawn.
The artificial turf obtained from example 4, comparative examples 5 and 8 was evaluated for drainage rate, permeability, pull-off strength, peel strength, cooling efficiency and dimensional stability, and the results are shown in table 5 below.
[ Table 5]
In example 4, the artificial turf was made of a knitted fabric, the cushion layer was made of a short fiber nonwoven fabric, and the backsize layer was made of a long fiber nonwoven fabric, and had superior water drainage and permeability as compared to comparative examples 7 and 8.
Preferably, the artificial turf has a permeability of 50cc/cm2/sec~70cc/cm2Sec, and in example 4 60.12cc/cm2And/sec. However, there is no permeability in comparative examples 7 and 8. In comparative examples 7 and 8, an additional drainage hole is required for drainage of the artificial turf, and in example 4, the cushion layer and the back adhesive layer are made of non-woven fabric and the base layer is made of knitted fabric, thereby performing a drainage function without an additional drainage hole. In other words, the results show that the drainage was improved due to the high permeability.
In addition, the first fabric with low melting point of the buffer layer and the grass seedling units are combined in a melting mode, the connecting parts connected to the buffer layer are exposed on the base layer, the tail end of the buffer layer is unfolded after being untied, and the long fibers of the gum layer and the grass seedling units are combined into a solid body through melting. Therefore, the pull-off strength of the artificial turf in example 4 was higher than that of comparative examples 7 and 8. The results show that the buffer layer, the grass seedling units and the gum layer have excellent cohesive force and high peel strength.
Further, in example 4, since the permeability is high, the fluid contained in the cushion layer and the back adhesive layer is vaporized toward one direction of the grass seedling unit through the connection portion, excellent antistatic property is achieved, and the temperature is lowered. By reducing the temperature, the dimensional stability is improved, and the artificial turf is not affected by the external temperature.
It will be readily understood that the present invention and many of the attendant advantages thereof will be more fully appreciated by reference to the detailed description set forth above when considered in connection with the accompanying drawings in which like reference numerals designate the same or similar components.
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