KR102479223B1 - Pile yarn for artificial turf having a different cross-section and artificial turf structure comprising the same - Google Patents

Abstract

According to one embodiment, provided is pile yarn for artificial turf including a core and a blade protruding from the outer surface of the core, wherein the blade has a convergent irregular cross-section in which a cross-sectional area in a transverse direction decreases as a distance from the outer circumference of the core increases.

Description

Pile yarn for artificial turf having a condensed cross-section and artificial turf structure comprising the same Pile yarn for artificial turf having a different cross-section and artificial turf structure comprising the same

The present invention relates to a pile yarn for artificial turf having a converging profile and an artificial turf structure including the same.

Artificial turf is a substitute for natural turf artificially made by using materials such as synthetic resin yarns and rubber chips to have the form of grass, and is composed of grass piles, bubble paper, silica sand, and fillers.

The grass pile is manufactured by drawing synthetic resins such as polyethylene and nylon, and the grass pile is fixed on the bubble paper, and the fiber pile is made of latex (latex) to improve the pulling force. It refers to a fabric coated with a polymer resin such as latex and urethane, and a filler is a material used to build, support, and cushion artificial turf.

Currently, artificial turf is widely used as a finishing material for school playgrounds, sports grounds, sports facilities, landscaping inside and outside buildings, and roof greening. In order to realize speed, it is used by constructing a silica sand layer alone without a filler.

In addition, conventional artificial turf for playgrounds/multipurpose use is filled with only silica sand, and silica sand is lost during long-term use or rainy weather, which may cause quality problems with respect to Play performance and user safety.

(0001) Republic of Korea Patent Publication No. 10-2021-0095541 (2021.08.02. Publication)

The problem to be solved by the present invention is to provide pile yarn for artificial turf having a condensed hetero-shaped cross-section that can minimize loss of silica sand (mineral) included in the filling layer during long-term use or rain, and to provide an artificial turf structure including the same will be.

According to an embodiment of the present invention, an artificial turf comprising a core and a blade protruding from an outer surface of the core, wherein the blade has a convergent heterogeneous cross-section in which a cross-sectional area in a transverse direction decreases as the distance from the outer circumference of the core increases. Provides a file company for

The blades protrude along the radial direction of the core, and may be provided in pairs so as to protrude in mutually opposite directions around the core.

The diameter of the core (L ₂ ) is 200 to 300 μm, and the distance between both ends of the pair of blades (L ₁ ) may be 750 to 1,050 μm.

A maximum thickness of the pair of blades may be smaller than a diameter of the core.

The outer surface of the blade may be formed to form a curved surface.

According to another embodiment, the present invention includes a bubble paper, a core tufted on the bubble paper, and a blade protruding from an outer surface of the core, wherein the blade has a transverse cross-sectional area as it moves away from the outer circumference of the core. A pile part composed of smaller pile yarns, a filling layer formed between the foam paper and the pile part and composed of a first mineral, a second mineral, and a third mineral, and a back coating on the back surface of the foam paper to prevent the pile yarn from being pulled out. It provides an artificial turf structure comprising a back coating to do.

The height of the pile part may be 15 to 25 mm from the bottom surface of the bubble paper.

The number per unit area of the pile yarn may be 330,000 to 460,000 ea/m ² .

The first mineral, the second mineral, and the third mineral may be at least one selected from the group consisting of granite, quartzite, sandstone, pygmatite, and bentonite.

The particle size of the first mineral may be 850 to 1,500 μm, the particle size of the second mineral may be 500 to 850 μm, and the particle size of the third mineral may be 100 to 500 μm.

The filling layer may include the first mineral, the second mineral, and the third mineral in a weight ratio of 1:7 to 9:0.5 to 2.

The filling layer may be filled with 15 to 25 kg per unit area.

According to the present invention, it is possible to minimize the loss of minerals filled in the artificial turf during long-term use or rainy weather by using the pile yarn for artificial turf having a coherent cross-section and the filling layer containing minerals of different particle sizes.

1 shows a cross section of pile yarn for artificial turf having a bundling deformed cross section according to an embodiment of the present invention.
2 shows an artificial turf structure according to another embodiment of the present invention.
3 is a plan view of an artificial turf structure according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts are denoted by the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related known functions or configurations are omitted in order not to obscure the gist of the present invention.

As used herein, the terms about, substantially, etc., of degree, are used at or close to the value when manufacturing and material tolerances inherent in the referenced meaning are given, and are used in an accurate or Absolute numbers are used to prevent exploitation by unscrupulous infringers of the stated disclosure.

Hereinafter, a pile yarn for artificial turf having a bundling deformed cross section according to an embodiment of the present invention will be described.

1 shows a cross section of pile yarn for artificial turf having a bundling deformed cross section according to an embodiment of the present invention.

The present invention, according to one embodiment, consists of a core and a blade protruding from the outer surface of the core. In addition, the blade provides a pile yarn 210 for artificial turf having a convergent irregular cross-section in which a cross-sectional area in a transverse direction decreases as the distance from the outer circumference of the core increases.

The core may impart upright stability to the pile yarn 210, and the blade may make the pile yarn 210 exhibit good bending properties. In addition, the pile yarn 210 for artificial turf having the bundling cross section can improve softness and friction characteristics due to the blade.

The blades protrude along the radial direction of the core, and may be provided in pairs so as to protrude in mutually opposite directions around the core. Since the blades are provided in pairs on one pile yarn 210, it is possible to exhibit an effect of preventing loss of minerals of the artificial turf structure 1 to be described below.

The diameter (L ₂ ) of the core is 200 to 300 μm, the distance between both ends of the pair of blades (L ₁ ) may be 750 to 1,050 μm, and preferably the diameter (L ₂ ) of the core is 230 to 270 It may be ㎛, and the distance (L ₁ ) between both ends of the pair of blades may be 800 to 950 ㎛.

If the diameter (L ₂ ) of the core is less than 200 μm and the distance (L ₁ ) between both ends of the pair of blades is less than 750 μm, there is a problem in that the erection stability of the pile yarn 210 is lowered, and the artificial turf structure There is a problem in that the concentration of the minerals filled in (1) is lowered and the loss rate increases. The diameter (L ₂ ) of the core exceeds 300 μm, and the distance (L ₁ ) between both ends of the pair of blades is 1,050 If it exceeds ㎛, the workability of tufting the pile yarn 210 to the foam paper 100 is poor, and there is a problem in that workability is poor due to insufficient space for inserting minerals, and the above range is preferable.

In addition, the maximum thickness of the pair of blades is smaller than the diameter of the core. When the maximum thickness of the blade is greater than the diameter of the core, the radioactivity is lowered, and the space for inserting minerals is narrow, resulting in poor workability, and the above range is preferable.

The outer surface of the blade may be formed to form a curved surface. That is, the blade has no edge, so that the user can feel a soft touch, and there is an advantage in that the user's skin is not scratched.

Pile yarn 210 for artificial turf having a cohesive heterogeneous cross section composed of the core and the blade is polypropylene (PP), linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene ( HDPE) and at least one selected from the group consisting of mixed resins thereof, and preferably may be a mixture of linear low-density polyethylene (LLDPE) and high-density polyethylene (HEPE), and the mixing ratio is 1:0.1 ~1, preferably 1:0.18.

In the present invention, the pile yarn 210 was manufactured using a mixed resin in which linear low-density polyethylene and high-density polyethylene were mixed at a ratio of 1:0.18, and the mixed resin was 60 to 95% by weight relative to 100% by weight of the total pile yarn 210 can include

If it is less than 60% by weight of the mixed resin, there is a problem that the softness, which is a feature of the blade, is deteriorated, and if it exceeds 85% by weight, there is a problem that the wear resistance of the blade is reduced, and the above range is preferable.

In addition, the pile yarn 210 for artificial turf having a bundling cross-section may further include at least one selected from the group consisting of a color masterbatch, an anti-aging agent, a weathering agent, an antioxidant, and a flame retardant.

The color master batch may include 1 to 10% by weight, preferably 2 to 8% by weight, based on 100% by weight of the pile yarn 210. If the content of the color master batch is less than 1% by weight, the color does not come out evenly and the quality of the pile yarn may deteriorate, and if it exceeds 10% by weight, there is a problem in that the durability of the pile yarn 210 is reduced. One range is preferred.

In addition, the weathering agent, anti-aging agent, antioxidant and flame retardant may each contain 0.5 to 8% by weight relative to 100% by weight of the pile yarn 210. In addition, the types of the anti-aging agent, antioxidant and flame retardant are not particularly limited, and conventional ones may be used.

2 shows an artificial turf structure according to another embodiment of the present invention, and FIG. 3 shows a plan view of the artificial turf structure according to another embodiment of the present invention.

According to another embodiment, the present invention includes a foam paper 100, a core tufted to the foam paper 100, and a blade protruding from an outer surface of the core, the blade extending from the outer circumference of the core. A pile part 200 composed of pile yarns 210 whose cross-sectional area in the transverse direction decreases as the distance increases, formed between the bubble paper 100 and the pile part 200, the first mineral 310, the second mineral ( 320) and a third mineral 330, and a back-coating portion 400 that is back-coated on the back side of the bubble paper 100 to prevent the pile yarn 210 from being pulled out. A grass structure (1) is provided.

The bubble paper 100 can provide shape stability capable of maintaining the shape of the artificial turf structure 1 by fixing the pile portion 200 that is tufted by a needle.

The bubble paper 100 may be a polyolefin-based woven fabric or a polyester-based woven fabric, and may be used in a laminated manner. Dimensional stability can be improved when used in a stacked manner. For example, the polyolefin type may be polyethylene and polypropylene, and the polyester type may be polyethylene terephthalate.

The pile unit 200 is composed of a plurality of pile yarns 210. Since the pile yarns 210 have been described above, a description thereof will be omitted.

The height of the pile part 200, that is, the height of the plurality of pile yarns 210 may be 15 to 25 mm from the bottom surface of the foam paper 100, preferably 19 to 20 mm. If the height of the pile part 200 is less than 15 mm, the filling space of the minerals to be described below becomes narrow, and the filling amount of the minerals becomes insufficient, and accordingly, there is a problem that the shock absorption performance is lowered, and the height exceeds 25 mm. If the surface flatness is lowered due to excessive filling, there is a problem that the mineral cohesiveness is lowered, and the above range is preferable.

In addition, the number of pile yarns 210 per unit area may be 330,000 to 460,000 ea/m ² , preferably 350,000 to 430,000 ea/m ² . If the number per unit area of the pile yarn 210 is less than 330,000 ea / m ² , there is a problem of deterioration in abrasion resistance, and if it exceeds 460,000 ea / m ² , the space to be filled with minerals is narrow, and workability and stability are deteriorated. In this case, the above range is preferable.

The first mineral 310, the second mineral 320, and the third mineral 330 of the filling layer 300 include at least one selected from the group consisting of granite, quartzite, sandstone, pygmatite, and bentonite. It may be, preferably quartzite.

The first mineral 310 is filled to implement ground stabilization, and the particle size of the first mineral 310 may be 850 to 1,500 ㎛, preferably 1,000 to 1,300 ㎛.

If the particle size of the first mineral 310 is less than 850 μm, there is a problem in that the ground stabilization effect is lowered, and if the particle size of the first mineral 310 exceeds 1,500 μm, the construction of the artificial turf structure 1 Since it is not easy, the above range is preferable.

The second mineral 320 is filled to increase the mineral loss prevention effect, and the particle size of the second mineral 320 may be 500 to 850 μm, preferably 600 to 800 μm.

If the particle size of the second mineral 320 is less than 500 μm, the effect of preventing mineral loss and improving Play performance is insignificant, and if it exceeds 850 μm, there is a problem in that filling is not easily performed between the bundled and shaped cross-section pile yarns. , the above range is preferable.

The third mineral 330 is filled in order to implement mineral coherence, and the particle size of the third mineral 330 may be 100 to 500 μm, preferably 200 to 400 μm.

If the particle size of the third mineral 330 is less than 100 ㎛, there is a problem that dust may occur, and there is a problem that the loss rate is increased due to poor convergence, and if it exceeds 500 ㎛, pores in the mineral are blocked to improve the convergence There is a problem that the raising effect is not good, and the above range is preferable.

The filling layer 300 is formed between the bubble paper 100 and the pile part 200, and may be composed of a first mineral 310, a second mineral 320, and a third mineral 330. In addition, the first mineral 310, the second mineral 320, and the third mineral 330 may be included in a weight ratio of 1:7 to 9:0.5 to 2, preferably 1:8:1 weight ratio. can be included as

When the weight ratio of the second mineral 320 to the first mineral 310 is less than 7 and the weight ratio of the third mineral 330 is less than 0.5, the effect of preventing loss of minerals is reduced, and the consolidation property of blocking pores in the mineral is reduced. When the weight ratio of the second mineral 320 to the first mineral 310 exceeds 9 and the weight ratio of the third mineral 330 exceeds 2, the ground stabilization effect is reduced. In this case, the above range is preferable.

In addition, the filling layer 300 may be filled with 15 to 25 kg per unit area, preferably 19 to 21 kg. If the amount of mineral filling in the filling layer 300 is less than 15 kg, there is a problem in that abrasion resistance is deteriorated due to excessive exposure of the pile yarn, and if it exceeds 25 kg, the surface of the artificial turf structure 1 becomes slippery, and Play stability is improved. There is a problem of deterioration, and the above range is preferable.

The back coating unit 400 is back-coated on the back side of the bubble paper 100 to prevent the pile yarn 210 from being pulled out.

The back coating part 400 is a group consisting of styrene butadiene rubber (SBR), polyurethane (PU), latex, polyethylene film, and polyethylene terephthalate (PET) nonwoven fabric It may be one or more selected from among.

At this time, in the case of the styrene butadiene rubber (SBR), polyurethane (PU) and latex (Latex), it can be formed by applying a wet drying method, and the polyethylene film and PET (Polyethylene In the case of terephthalate, PET) non-woven fabric, it can be formed using a dry thermal fusion method.

Since the method of forming the back coating part 400 on the rear surface of the artificial turf structure 1 is a conventional technique, description thereof will be omitted.

Hereinafter, the present invention will be described in more detail by examples. However, the following examples are merely illustrative of the present invention, and the content of the present invention is not limited to the following examples.

Preparation Example 1

79% by weight of linear low-density polyethylene (LLDPE), 14% by weight of high-density polyethylene (HDPE), 6% by weight of color masterbatch, and 1% by weight of weathering agent were put into a spinning machine, and a pile was used using the core and blade-type cap of the present invention. yarn was manufactured.

At this time, the diameter (L ₂ ) of the core of pile yarn for artificial turf having a deformed cross-section is 250 μm, and the distance (L ₁ ) between both ends of a pair of blades is 900 μm.

Preparation Example 2

Pile yarn for artificial turf having a deformed cross-section was manufactured in the same manner as in Preparation Example 1, except that the diameter (L ₂ ) of the core was 200 μm and the distance (L ₁ ) between both ends of the blade was 750 μm.

Preparation Example 3

Pile yarn for artificial turf having a deformed cross-section was manufactured in the same manner as in Preparation Example 1, except that the diameter (L ₂ ) of the core was 300 μm and the distance (L ₁ ) between both ends of the blade was 1,050 μm.

Comparative Preparation Example 1

Pile yarn for artificial turf having a deformed cross-section was manufactured in the same manner as in Preparation Example 1, except that the diameter (L ₂ ) of the core was 100 μm and the distance (L ₁ ) between both ends of the blade was 700 μm.

Comparative Preparation Example 2

Pile yarn for artificial turf having a deformed cross-section was manufactured in the same manner as in Preparation Example 1, except that the diameter (L ₂ ) of the core was 400 μm and the distance (L ₁ ) between both ends of the blade was 700 μm.

Production Example 4

It was prepared and prepared so that the particle size of the mineral was 1,000 ~ 1,300 ㎛.

Preparation Example 5

It was prepared and prepared so that the particle size of the mineral was 600 ~ 800 ㎛.

Preparation Example 6

It was prepared and prepared so that the particle size of the mineral was 200 ~ 400 ㎛.

Comparative Preparation Example 3

It was prepared and prepared so that the particle size of the mineral was 1,700 ~ 1,900㎛ or more.

Comparative Preparation Example 4

It was prepared and prepared so that the particle size of the mineral was 50 ~ 90 ㎛.

Example 1

An artificial turf structure was prepared by tufting a pile yarn having a deformed cross-section prepared according to Preparation Example 1 to foam paper made of polypropylene, and then attaching a PET nonwoven fabric to the back of the foam paper.

Example 2

An artificial turf structure was prepared by tufting a pile yarn having a deformed cross-section prepared according to Preparation Example 2 to foam paper made of polypropylene, and then attaching a PET nonwoven fabric to the back of the foam paper.

Example 3

An artificial turf structure was prepared by tufting the pile yarn having a deformed cross-section prepared according to Preparation Example 3 to foam paper made of polypropylene, and then attaching a PET nonwoven fabric to the back of the foam paper.

Comparative Example 1

After tufting the pile yarn prepared according to Comparative Preparation Example 1 to foam paper made of polypropylene, a PET nonwoven fabric was attached to the back of the foam paper to prepare an artificial turf structure.

Comparative Example 2

After tufting the pile yarn prepared according to Comparative Preparation Example 2 to foam paper made of polypropylene, a PET nonwoven fabric was attached to the back of the foam paper to prepare an artificial turf structure.

Experimental Example 1: Measurement of mineral loss rate according to pile yarn

After constructing Examples 1 to 3 and Comparative Examples 1 to 2, respectively, the minerals prepared according to Preparation Examples 4 to 6 were differently filled, and then the mineral loss rate was measured and shown in Table 1 below.

[How to measure]

The stud abrasion evaluation method in the KS F 3888-1 Outdoor Sports Facility - Artificial Turf Standard was borrowed.

The size of the test piece is 800 X 400 mm, and the ratio was calculated by measuring the weight of minerals (W2) lost to the test piece tray after the wear evaluation (10,000 cycles) compared to the initial mineral filling weight (W1).

Loss rate (%) = (W2/W1)*100

At this time, the mineral filling amount was fixed at 20 kg/m ² .

division core
diameter
(μm) blade
length
(μm) Production Example 4
content ratio Preparation Example 5
content ratio Preparation Example 6
content ratio Loss rate (%) Example 1 250 900 One 8 One 1.3 Example 2 200 750 One 8 One 1.9 Example 3 300 1,050 One 8 One 1.7 Comparative Example 1 100 700 One 8 One 4.5 Comparative Example 2 400 700 One 8 One 5.4

As can be seen in Table 1, in the case of Examples 1 to 3, the loss rate of minerals is 2% or less, whereas in the case of Comparative Examples 1 and 2, it can be seen that the loss rate is very high at 4.5 to 5.4%. In particular, Example 1 In the case of , it can be confirmed that the loss rate is the least. Therefore, it can be confirmed that the pile yarn having a bundled irregular cross-section manufactured according to the present invention improves the loss rate of minerals.

Experimental Example 2: Measurement of loss rate according to mineral particle size

Application Example 1 and Comparative Application Example 1 to 5 types of minerals (Production Examples 4 to 6, Comparative Production Example 3, and Comparative Production Example 4) for each particle size of the mineral were filled in the artificial turf structure manufactured according to Example 1 The loss rate of 5 was measured.

At this time, the weight ratio was filled at 1:8:1.

division Production Example 4
1,000~1,300㎛ (weight ratio) Preparation Example 5
600~800㎛
(weight ratio) Preparation Example 6
200~400㎛
(weight ratio) Comparative Preparation Example 3
1,700 ~ 1,900㎛
(weight ratio) Comparative Preparation Example 4
50~90㎛
(weight ratio) loss rate
(%) Application example 1 One 8 One - - 1.5 Comparative application example 1 One - 8 One - 3.2 Comparative application example 2 - 8 One - One- 4.2 Comparative application example 3 8 - - One One 4.5 Comparative application example 4 One 8 - One - 3.9 Comparative application example 5 3 8 One - - 3.5

As can be seen in Table 2, the loss rate of diesel oil in Application Example 1 is 2% or less, whereas in Comparative Application Examples 1 to 5 filled with three types of minerals outside the mineral particle size range of the present invention, the loss rate increases to 3 to 4% can confirm that That is, the present invention has an effect of saving maintenance and management costs because the loss rate is lowered when three types of minerals are filled with a specific size and specific content.

Experimental Example 3: Measurement of loss rate compared to the weight ratio of minerals

The loss rates of Application Example 1 and Comparative Application Examples 7 to 9 were measured by filling the artificial turf structure prepared according to Example 1 with the three minerals prepared according to Preparation Examples 4 to 6.

At this time, the loss rate was measured after filling with differences in weight ratio.

division Production Example 4
1,000~1,300㎛
(weight ratio) Preparation Example 5
600~800㎛
(weight ratio) Preparation Example 6
200~400㎛
(weight ratio) loss rate
(%) Application example 1 One 8 One 1.5 Comparative application example 6 One 6 One 4.1 Comparative application example 7 One 10 One 4.9 Comparative application example 8 One 8 0.2 4.5 Comparative application example 9 One 8 2.5 4.5

As can be seen from Table 3 above, in the case of Application Example 1, the loss rate is 1.5%, whereas in the case of Comparative Application Examples 6 to 9, it can be seen that more than 4% of minerals are lost. That is, the present invention has the effect of lowering the loss rate of minerals by filling three types of minerals with a specific content.

1: artificial turf structure 100: bubble paper
200: file unit 210: file company
300: filling layer 310: first mineral
320: second mineral 330: third mineral
400: back coating unit

Claims (12)

core, and
Includes a blade protruding from the outer surface of the core,
The blade has a smaller transverse cross-sectional area as it moves away from the outer circumference of the core,
the blade,
It protrudes along the radial direction of the core and is provided in pairs so as to protrude in mutually opposite directions around the core,
The blade is formed such that the outer surface forms a curved surface,
The diameter (L2) of the core is 200 to 300 μm,
The distance (L1) between both ends of a pair of blades is 750 to 1,050 ㎛,
Pile yarn for artificial turf having a convergent heterogeneous cross-section, wherein the maximum thickness of the pair of blades is smaller than the diameter of the core. delete delete delete delete bubble paper,
A pile portion tufted on the bubble paper and composed of the pile yarn of claim 1;
A filling layer formed between the bubble paper and the pile part and composed of a first mineral, a second mineral, and a third mineral, and
Including a back coating portion that is back coated on the back side of the bubble paper to prevent the pile yarn from being pulled out,
artificial turf structure. According to claim 6,
Characterized in that the height of the pile part is 15 to 25 mm from the bottom of the bubble paper,
artificial turf structure. According to claim 6,
The number of pile yarns per unit area is,
330,000 ~ 460,000 ea / m ² Characterized in that,
artificial turf structure. According to claim 6,
The first mineral, the second mineral and the third mineral,
Characterized in that it comprises at least one selected from the group consisting of granite, quartzite, sandstone, pygmatite and bentonite,
artificial turf structure. According to claim 6,
The particle size of the first mineral is 850 ~ 1,500 ㎛,
The particle size of the second mineral is 500 to 850 μm,
Characterized in that the particle size of the third mineral is 100 to 500 μm,
artificial turf structure. According to claim 6,
The filling layer is
Characterized in that the first mineral, the second mineral and the third mineral are included in a weight ratio of 1: 7 to 9: 0.5 to 2,
artificial turf structure. According to claim 6,
The filling layer is
Characterized in that 15 to 25 kg per unit area is filled,
artificial turf structure.

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