KR102375538B1 - Artificial turf structure with ground reinforcement layer - Google Patents

Abstract

The present invention is to provide an artificial turf structure that prevents ground subsidence and additionally exhibits a temperature reduction effect. According to the present invention, the artificial turf structure comprises: a bubbly layer; a moisture containing layer disposed on an upper surface of the bubbly layer; a pile part made of polyolefin yarns napped through the bubbly layer and the moisture containing layer; a moisture transfer layer disposed on a lower surface of the bubble layer and preventing separation of the pile part; and a ground reinforcement layer disposed on a lower surface of the moisture transfer layer.

Description

Artificial turf structure with ground reinforcement layer

The present invention relates to an artificial turf structure having a ground reinforcement layer.

In general, artificial turf for sports fields, especially soccer fields, imitates the characteristics, shape and use of natural turf, so it is easy to maintain and inexpensive in comparison to natural turf. It is being installed in many playgrounds because it can improve the quality and quantity, and in most cases, artificial turf is installed on top of stone dust, along with shock-absorbing pads, etc.

However, when used on stone dust finish, ground subsidence due to intensive heavy rain such as the rainy season in Korea and consequent deterioration in user performance may occur. .

Registered Patent No. 10-1142391 (2012.04.26.)

The problem to be solved by the present invention is to provide an artificial turf structure that prevents ground subsidence and additionally exhibits a temperature reduction effect.

One embodiment of the present invention is a bubble layer; a moisture-containing layer disposed on the upper surface of the bubble layer; a pile part made of polyolefin yarns napped through the bubble layer and the moisture-containing layer; a moisture transfer layer disposed on the lower surface of the bubble layer and preventing separation of the pile part; and a ground reinforcing layer disposed on a lower surface of the moisture transfer layer.

The moisture-containing layer may be a woven or non-woven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon.

The moisture transfer layer may be a woven or nonwoven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon.

The ground reinforcing layer may be a woven or non-woven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon.

The ground reinforcement layer may be composed of an upper layer and a lower layer, and may further include a mineral therein.

The mineral may be at least one selected from the group consisting of smectite, illite, kaolinite, chlorite, dicite, bentonite, parasite and zeolite.

The particle size of the mineral may be 0.02 ~ 5mm.

The filling amount of the mineral may be 0.5-10 kg/m ² .

A drain hole may be formed in the upper layer and the lower layer, and an interval between the drain holes may be 1 to 20 cm.

The ground reinforcement layer may be composed of an upper layer and a lower layer, and a plurality of partition walls may be formed between the upper layer and the lower layer.

One end of the partition wall may be connected to the upper surface of the lower layer, and the other end of the partition wall may penetrate the upper layer and contact the lower surface of the moisture transfer layer.

The spacing of the partition walls may be 0.5-5 mm, and the height of the partition walls located in the ground reinforcement layer may be 2-20 mm.

The partition wall may be formed by a needle punching process.

The partition wall may be a woven or non-woven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon.

The artificial turf structure may include minerals between the yarns.

The present invention can prevent ground subsidence due to heavy rain by including a ground reinforcing layer inside the mineral that absorbs water, and can exhibit a temperature reduction effect according to the moisture content effect.

The present invention can exhibit a temperature reduction effect by including a moisture transfer layer and a moisture-containing layer.

The present invention prevents the loss of minerals by forming a partition wall inside the ground reinforcement layer, and by moving one end of the partition wall in contact with the moisture transfer layer to move the moisture in the ground reinforcement layer to the upper part of the artificial turf, a temperature reduction effect can be exhibited.

1 is an artificial turf structure according to the present invention.
2 is a view showing the upper layer of the ground reinforcement layer in which drainage holes are formed according to the present invention.
3 is an artificial turf structure including minerals between yarns according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. Throughout the specification, like reference numerals are assigned to similar parts.

1 is a view showing an artificial turf structure according to the present invention.

Referring to Figure 1, an embodiment of the present invention is a bubble layer 120; a moisture-containing layer 130 disposed on the upper surface of the bubble layer 120; a pile unit 110 made of polyolefin yarns 111 napped through the bubble layer 120 and the moisture-containing layer 130; a moisture transfer layer 140 disposed on the lower surface of the bubble layer 120 and preventing separation of the pile part 110; and one or more ground reinforcement layers 150 disposed on the lower surface of the moisture transfer layer 140; and an artificial turf structure 100 including a.

In the present invention, the foam layer 120 provides shape stability of the artificial turf structure 100 and serves to firmly seat and fix the pile part 110 made of the polyolefin yarn 111. Polyolefin, polyethylene terephthalate , may be a woven or nonwoven fabric of at least one fiber selected from the group consisting of polyvinylidene chloride and polyamide, and may preferably be a woven fabric of polyolefin fibers in order to provide more excellent shape stability, more preferably polypropylene It may be a woven fabric of fibers.

The nonwoven fabric may be manufactured by any one method selected from the group consisting of a spunbond method, a melt brown method, a needle punching method, and a spunlace method.

In the present invention, the moisture-containing layer 130 is disposed on the upper surface of the bubble layer 120 to improve the shape stability of the artificial turf structure 100, and the minerals 160 and the moisture transfer layer 140 move By containing moisture, it is possible to lower the temperature of the artificial turf structure 100 .

The thickness of the moisture-containing layer 130 may be 0.1 to 3.0 mm, preferably 0.2 to 1.0 mm. If the thickness of the moisture-containing layer 130 is less than 0.1 mm, it is difficult to support the artificial turf structure 100 because the thickness is too thin, and it is difficult to contain moisture. If it exceeds mm, the effect of reducing the temperature is insignificant, and the cost is high and economical efficiency is lowered.

The moisture-containing layer 130 may be a woven or non-woven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon, and preferably imparts superior shape stability and moisture content. It may be a polyethylene terephthalate short fiber nonwoven fabric to increase the .

The nonwoven fabric may be manufactured by any one method selected from the group consisting of a spunbond method, a melt brown method, a needle punching method, and a spunlace method.

In the present invention, the pile part 110 serves to impart characteristics similar to natural grass in the artificial turf structure 100, and is raised through the bubble layer 120 and the moisture-containing layer 130. made of polyolefin yarns (111).

Specifically, the polyolefin yarn 111 is a tufting method in which a loop pile of a certain shape is formed by tufting the polyolefin yarn 111 to the bubble layer 120 and the moisture-containing layer 130, and the bubble layer and the pile are formed at the same time It may be napped by a mocket method or a Rassel method, etc., and the polyolefin yarn 111 used to form the pile part 110 may be a monofilament yarn or a split yarn, but this not limited

The polyolefin monofilament yarn is a single yarn made of one long polyolefin filament, and in the present invention, when the pile part 110 is formed with the polyolefin monofilament yarn in the present invention, a plurality of strands may be napped in the foam layer.

The polyolefin split yarn is a kind of polyolefin film yarn in which a slit yarn prepared by thinly cutting a polyolefin film and stretching it with heat is constantly refined using a fibrillating device such as a cutting drum or a pin drum. It may have a width, and in the present invention, when the pile part 110 is formed with the polyolefin split yarn, several strands of the split yarn may be napped in the bubble layer 120 and the moisture-containing layer 130 according to the size of the width, The strands may be napped.

In the present invention, the form in which the polyolefin yarns 111 are entrained in the bubble layer 120 and the moisture-containing layer 130 is not particularly limited, and specifically penetrates the bubble layer 120 and the moisture-containing layer 130 once. It may be in a “U” shape, or a “W” shape passing through the bubble layer 120 and the moisture-containing layer 130 twice.

In the present invention, the polyolefin yarn 111 may be polyethylene, polypropylene, or polyamide, and in terms of smooth thermal bonding, polyethylene having the lowest melting point is preferable, and in terms of recycling of the artificial turf structure, a bubble layer The same material as the material forming the 120 and the moisture-containing layer 130 is preferable.

In the present invention, the moisture transfer layer 140 is disposed on the lower surface of the bubble layer 120 , prevents separation of the pile part 110 , and absorbs moisture transferred from the ground reinforcement layer 150 and the mineral 160 . As serving to transfer to the moisture-containing layer 130, it may be a woven or non-woven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon, and preferably more excellent shape stability and may be a polyethylene terephthalate long fiber nonwoven fabric to increase water transfer efficiency.

The moisture transfer layer 140 formed of the long fiber nonwoven fabric has excellent mechanical strength and weather resistance, and due to its mechanical strength, deformation and physical properties do not occur even after long-term installation.

In addition, the moisture transfer layer 140 has excellent water permeability, thereby exhibiting an excellent drainage effect, and is made of the same material as the ground reinforcing layer, so that the moisture transferred from the ground reinforcing layer 150 and the mineral 160 is absorbed by the water moisture layer 130 . It can be easily transferred to the surface, and the coupling force with the ground reinforcement layer 150 can be improved through coupling with the other end of the partition wall 153 .

The long fibers of the moisture transfer layer 140 may be fused at a temperature exceeding 120° C., and the long fibers of the moisture transfer layer 140 are thermally fused with the moisture moisture layer 130 and the pile unit 110 . combined, thereby improving the pulling-out strength of the artificial turf structure 100 and allowing moisture to be easily moved.

The ground reinforcing layer 150 is to prevent subsidence of the ground due to heavy rain and transfer moisture to the moisture transfer layer to generate a temperature reduction effect, and may include one or more layers. The ground reinforcing layer 150 may be a woven or non-woven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon, and preferably improves the water transfer effect, and prevents ground subsidence. To improve, it may be polyethylene terephthalate long fiber nonwoven fabric.

The ground reinforcement layer 150 may be composed of an upper layer 151 and a lower layer 152, and may further include a mineral 160 therein, specifically, a mineral between the upper layer 151 and the lower layer 152 ( 160) may be further included.

The mineral 160 may be at least one selected from the group consisting of smectite, illite, kaolinite, chlorite, dicite, bentonite, parasite, and zeolite, and preferably bentonite having a high water absorption.

It may be 0.02-5 mm of the mineral 160, and if the particle size of the mineral 160 is less than 0.02 mm, the effect of preventing ground subsidence due to loss due to heavy rain is lowered, and when it exceeds 5 mm, the volume due to water absorption Deformation of the layer may occur due to expansion.

In addition, the filling amount of the mineral 160 may be 0.5-10 kg/m ² , preferably 2-6 kg/m ² , and more preferably 3-5 kg/m ² . If the filling amount of the mineral 160 is less than 0.5kg/m ² , it may be lost due to heavy rain, the effect of preventing ground subsidence may be lowered, and if it exceeds 10 kg/m ² , the volume expansion due to water absorption Due to this, deformation of the ground reinforcement layer 150 may occur.

2 is a view showing the upper layer of the ground reinforcement layer in which drainage holes are formed according to the present invention.

Referring to FIG. 2 , in the present invention, the ground reinforcement layer 150 may further include a drain hole 154 , and specifically, a drain hole 154 is formed in the upper layer 151 and the lower layer 152 by 1 to 20 cm. may be formed at intervals.

In the present invention, the ground reinforcement layer 150 includes an upper layer 151 and a lower layer 152 , and a plurality of partition walls 153 may be formed between the upper layer 151 and the lower layer 152 .

The partition wall 153 prevents the loss of the minerals 160 included in the ground reinforcing layer 150 , and transfers moisture contained in the ground reinforcing layer 150 and the minerals 160 to the water transfer layer 140 . For transmission, it may be formed at intervals of 0.5 to 5 mm.

If the interval between the partition walls 153 is less than 0.5 mm, the diameter of the mineral 160 is reduced, and accordingly, the mineral 160 may be lost due to heavy rain, etc., and if the interval exceeds 5 mm, the number of the partition walls 153 is reduced Moisture transfer may not be easy.

In the present invention, one end of the partition wall 153 is connected to the upper surface of the ground reinforcement layer lower layer 152, and the other end of the partition wall 153 penetrates the ground reinforcement layer upper layer 151 and the moisture transfer layer 140. may be in contact with the lower surface of Accordingly, moisture may be transferred to the moisture transfer layer 140 .

The height of the partition wall 153 located in the ground reinforcement layer 150 may be 2 to 20 mm, preferably 3 to 12 mm, and more preferably 4 to 8 mm. The height of the partition wall 153 penetrating the upper layer 151 of the ground reinforcement layer 150 may be 0.1 to 2.0 mm. If the height of the barrier rib 153 inside the ground reinforcement layer 150 is less than 2 mm, the content of the mineral 160 may be lowered to lower the ground subsidence prevention effect, and if it exceeds 20 mm, the height of the barrier rib 153 is too high Moisture transfer may not be easy.

In addition, the height of the barrier rib 153 penetrating the upper layer 151 of the ground reinforcing layer 150 has the best effect of moisture transfer within the above range.

The partition wall 153 may be formed by a needle punching process, and specifically, the partition wall 153 may be formed by penetrating a needle from the lower layer 152 to the upper layer 151 of the ground reinforcement layer 150 .

The partition wall 153 may be a woven or nonwoven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride, and nylon, and preferably, polyethylene terephthalate long fibers to improve the moisture transfer effect. It may be non-woven.

In the present invention, the ground reinforcing layer 150 is located on the lower surface of the water transfer layer 140, and the ground reinforcing layer 150 and the water transfer layer 140 may be coupled through an adhesive, etc., but is not limited thereto, and like a carpet. The water transfer layer 140 may be placed on the upper surface of the ground reinforcement layer 150 and used.

3 is a view showing an artificial turf structure including minerals between yarns according to the present invention.

The artificial turf structure 100 according to the present invention may include a mineral 160 between the upper surface of the impact moisture layer 130 and the pile part 110 in order to exhibit a temperature reduction effect, and the pile part 110 ), the mineral 160 may be attached, and a filler (not shown) may be further included in order to have an elastic force such as relaxation or natural grass.

The mineral 160 may contain moisture to exhibit a temperature reduction effect, and the particle size is the same as described above.

The filler may be made of a first filler and a second filler, and the first filler is filled on the upper portion of the moisture-containing layer 130 and between the pile units 110 , and acts as a buffer to act as a buffer from the ground during movement. It acts to alleviate the impact of Quartz sand is quartz grain sand containing silicon dioxide (SiO2), which is anhydrous silicic acid. There are natural silica sand, coastal silica sand, mountain silica sand, and artificial silica sand. Vermiculite is a mineral belonging to the monoclinic system having a crystal structure similar to that of mica, and is also called vermiculite. If vermiculite is used as a filler, it should be crushed to a size similar to silica sand.

The second filler is filled in the gap between the pile parts 110 on the upper portion of the first filler layer, and has a function of providing an elastic force to produce an effect similar to that of actual movement in natural grass, synthetic rubber elastomer or natural rubber elastomer is made of When synthetic rubber elastomers or natural rubber elastomers are used as fillers, they are used in the form of chips having an appropriate size. In this case, the synthetic rubber elastomer is preferably a polyolefin elastomer, and the material of the polyolefin elastomer includes polyethylene or polypropylene, and polyolefin fibers that form the foam layer 120 in terms of recycling of the artificial turf structure 100 . and/or preferably the same as the polyolefin material of the polyolefin yarn 111 forming the pile portion 110 .

Hereinafter, a method for manufacturing an artificial turf structure in the present invention will be briefly described.

A moisture-containing layer 130, which is a polyethylene terephthalate short fiber nonwoven fabric, is disposed on the upper surface of the foam layer 120, which is a nonwoven fabric made of polyolefin fibers, and the polyolefin yarn 111 is tufted to form the pile part 110. Thereafter, a moisture transfer layer 140 made of polyethylene terephthalate long fiber nonwoven fabric is disposed on the lower surface of the bubble layer 120 , and heat is applied to fix it through thermal fusion with the pile unit 110 and the bubble layer 120 .

Thereafter, an upper layer 151 and a lower layer 152 made of polyethylene terephthalate long fiber nonwoven fabric are prepared, and a partition wall 153 penetrating the upper layer 151 is formed in the lower layer 152 through a needle punching process, and the The ground reinforcement layer 150 is prepared by filling the mineral 160 between the partition walls 153 .

After that, the ground reinforcement layer 150 is placed on the lower surface of the moisture transfer layer 140, and the artificial turf structure 100 is manufactured by either fixing it using an adhesive depending on the conditions of use, or by placing it as it is without bonding for separation. .

Hereinafter, specific examples according to the present invention will be described.

Example 1

A polyethylene terephthalate (PET) short-fiber nonwoven fabric 0.5 mm thick moisture-containing layer is disposed on the upper surface of the polypropylene fiber woven fabric layer, and the polyethylene yarn is tufted. Thereafter, a moisture transfer layer, which is a nonwoven fabric of polyethylene terephthalate long fibers, is disposed on the lower surface of the cell layer, and heat-sealed at 160°C.

Thereafter, the upper and lower layers, which are non-woven fabrics of polyethylene terephthalate long fibers, are prepared, needle punched from the lower layer to the upper layer to form a number of partition walls penetrating the upper layer, and drain holes are formed at intervals of 10 cm through the perforation to form a ground reinforcement layer. prepared. The spacing of the partition walls is 2 mm, the height of the partition walls inside the ground reinforcement layer is 6 mm, and the height of the partition walls passing through the upper layer of the ground reinforcement layer is 0.5 mm. Bentonite having a particle size of 0.1 mm was filled inside the ground reinforcement layer at a filling amount of 4 kg/m ² . Thereafter, the artificial turf structure was manufactured by disposing the ground reinforcement layer on the lower surface of the moisture transfer layer.

Example 2

An artificial turf structure was manufactured in the same manner as in Example 1, except that in Example 1, the height of the partition wall inside the ground reinforcement layer was limited to 3 mm, and bentonite was filled at a filling amount of 2 kg/m ² .

Example 3

An artificial turf structure was manufactured in the same manner as in Example 1, except that in Example 1, the height of the partition wall inside the ground reinforcement layer was limited to 12 mm, and bentonite was filled at a filling amount of 6 kg/m ² .

comparative example

A polyethylene terephthalate (PET) short-fiber nonwoven fabric 0.5 mm thick moisture-containing layer is disposed on the upper surface of the polypropylene fiber woven fabric layer, and the polyethylene yarn is tufted. Thereafter, a moisture transfer layer, which is a nonwoven fabric of polyethylene terephthalate long fibers, was placed on the lower surface of the foam layer and heat-sealed at 160° C. to prepare an artificial turf structure.

Experimental Example 1

Using the artificial turf structures prepared in Examples 1 to 3 and Comparative Examples, temperature reduction continuity was comparatively measured by the following measurement method, and the results are shown in Table 1 below.

[measurement method]

After the artificial turf structure was impregnated in water for 10 minutes, a light irradiator (158W) was installed at a height of 300 mm, and after irradiating the artificial turf structure for 2 hours, the surface temperature of the artificial turf at the initial stage and after 2 hours was measured.

division Example 1 Example 2 Example 3 comparative example Initial (℃) 29 29 29 29 After 2 hours (℃) 66 75 78 82

Referring to Table 1, it can be confirmed that the temperature reduction continuity of the artificial turf structure (Examples 1 to 3) including the ground reinforcing layer according to the present invention is superior to that of the artificial turf structure (Comparative Example) not including the ground reinforcing layer. .

Experimental Example 2

Using the artificial turf structures prepared in Examples 1 to 3 and Comparative Examples, the degree of ground subsidence was comparatively measured by the following measurement method, and the results are shown in Table 2 below.

[measurement method]

Using the KS F 3888-1 limiting fall height evaluation method, a 4.6 kg weight was freely dropped from a height of 1M to compare and evaluate the height at which subsidence occurs. For the lower ground, crushed stone ground was used.

division Example 1 Example 2 Example 3 comparative example Ground subsidence (mm) 0 5 1.5 10

Referring to Table 2, it is confirmed that the ground subsidence prevention effect of the artificial turf structure (Examples 1 to 3) including the ground reinforcing layer according to the present invention is superior to that of the artificial turf structure (Comparative Example) not including the ground reinforcing layer. can

As described above, the present invention can prevent ground subsidence due to heavy rain by including a ground reinforcing layer inside the mineral that absorbs water, and can exhibit a temperature reduction effect according to the moisture content effect.

As above, preferred embodiments of the present invention have been described in detail with reference to the drawings. The description of the present invention is for illustrative purposes, and those skilled in the art to which the present invention pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention.

Accordingly, the scope of the present invention is indicated by the following claims rather than the description of the invention, and all changes or modifications derived from the meaning, scope, and equivalent concept of the claims are interpreted as being included in the scope of the present invention. should be

100: artificial turf structure 110: pile part
111: polyolefin yarn 120: bubble layer
130: moisture moisture layer 140: moisture transfer layer
150: ground reinforcement layer 151: upper layer
152: lower layer 153: bulkhead
154: drain hole 160: mineral

Claims (15)

bubble layer;
a moisture-containing layer disposed on the upper surface of the bubble layer;
a pile part made of polyolefin yarns napped through the bubble layer and the moisture-containing layer;
a moisture transfer layer disposed on a lower surface of the bubble layer and preventing separation of the pile part; and
a ground reinforcement layer disposed on a lower surface of the moisture transfer layer;
As an artificial turf structure comprising a,
The moisture transfer layer is a woven or nonwoven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride and nylon,
The ground reinforcement layer is a woven or nonwoven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride and nylon,
The ground reinforcement layer is composed of an upper layer and a lower layer, a plurality of partition walls are formed between the upper layer and the lower layer, and further comprising a mineral therein,
The mineral is at least one selected from the group consisting of smectite, illite, kaolinite, chlorite, dicite, bentonite, parasite and zeolite,
One end of the barrier rib is connected to the upper surface of the lower layer, and the other end of the barrier rib penetrates the upper layer and comes into contact with the lower surface of the moisture transfer layer,
The partition wall is an artificial turf structure, characterized in that it is a woven or long fiber nonwoven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride and nylon.
According to claim 1,
The water-containing layer is an artificial turf structure, characterized in that the woven or non-woven fabric of one or more fibers selected from the group consisting of polyolefin, polyethylene terephthalate, polyvinylidene chloride and nylon.
delete delete delete delete According to claim 1,
The artificial turf structure, characterized in that the particle size of the mineral is 0.02 ~ 5mm.
According to claim 1,
The artificial turf structure, characterized in that the filling amount of the mineral is 0.5 ~ 10kg / m ²
According to claim 1,
The upper and lower layers have drainage holes formed therein, and the distance between the drainage holes is 1 to 20 cm. The artificial turf structure.
delete delete According to claim 1,
The spacing of the partition walls is 0.5-5 mm, and the height of the partition walls located in the ground reinforcement layer is 2-20 mm.
According to claim 1,
The partition wall is an artificial turf structure, characterized in that formed by a needle punching process.
delete According to claim 1,
The artificial turf structure artificial turf structure, characterized in that it further comprises a mineral between the yarn.

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