KR102157036B1 - Artificial turf yarn for preventing burns, its manufacturing method and artificial turf structure using same - Google Patents

Abstract

Artificial turf yarn for preventing burns according to an embodiment of the present invention includes 80 to 95 wt% of polyethylene, 0.1 to 5 wt% of a compatibilizer, 1 to 10 wt% of an additive for preventing burns, and 1 to 10 wt% of a functional additive, wherein the additive for preventing burns includes at least one selected from a group consisting of paraffin wax, oxidized paraffin wax, stearic acid, cetyl alcohol, stearyl alcohol, glycerol monostearate, glycerol monooleate, stearyl stearate, calcium stearate, magnesium stearate, zinc stearate, erucamide, oleamide and steride.

Description

Artificial turf yarn for preventing burns, method for manufacturing the same, and artificial turf structure using the same {Artificial turf yarn for preventing burns, its manufacturing method and artificial turf structure using same}

The present invention relates to an artificial turf yarn for preventing burns, a method of manufacturing the same, and an artificial turf structure using the same.

Artificial turf is one of the specially used landscaping materials, and is a substitute for artificially made natural turf in the shape of a turf.

Since its first production in the United States, it has been mainly used in sports grounds, and can be used in indoor gardens where lawn growth is impossible, or in outdoor areas facing the north of high-rise buildings where sunlight is extremely limited.

Such artificial turf is mainly manufactured by combining a plastic material yarn and a rubber material filler. However, due to the fundamental problem of these materials, when users slide, friction occurs a lot, resulting in skin burns. In order to improve these disadvantages, most artificial turf stadiums have been developed in a form in which a large amount of water is sprayed on the surface before use or in a form that generates less frictional heat by increasing the moisture content of the yarn. This method can have a temporary effect, but in the case of hot weather, it was confirmed that even if a large amount of water was sprayed on the surface, all evaporated within 15 minutes and returned to the initial state. In addition, the method of increasing the surface moisture content by plasma treatment has a problem that the effect is not continuously maintained due to the characteristics of artificial turf exposed outdoors.

In order to solve this problem, the inventors of the present invention developed artificial turf yarns that can prevent burns by maintaining grip properties and reducing surface friction, while developing artificial turf yarns using this yarn.

KR 10-1980371 B1 (registration on May 14, 2019)

An object of the present invention is to improve the elasticity of artificial turf yarn by using a modified polyethylene and an additive for preventing burns, and to improve the slip property while maintaining the grip property to reduce the frictional heat generated due to friction with the human body. It is to provide an artificial turf yarn, a method for manufacturing the same, and an artificial turf structure using the same.

The artificial turf yarn for preventing burns according to an embodiment of the present invention is 80 to 95% by weight of polyethylene, 0.1 to 5% by weight of compatibilizer, 1 to 10% by weight of additives for preventing burns, and 1 to 10% by weight of functional additives Including, the additive for preventing burns, paraffin wax (Paraffin wax), oxidized paraffin wax (Oxydiertes Paraffin), stearic acid (Stearic acid), cetyl alcohol (Cetyl alcohol), stearyl alcohol (Stearyl alcohol), glycerol monostearate (Glycerol mono stearate), Glycerol mono oleate, Stearyl stearate, Calcium stearate, Magnesium stearate, Zinc stearate, Erucamide ( Erucamide), oleamide, and steramid (Steride) includes at least one selected from the group consisting of.

The polyethylene may be one or more selected from the group consisting of Linear Low Density Polyethylene, Low Density Polyethylene, Medium Density Polyethylene, and High Density Polyethylene. have.

The polyethylene is a polyethylene containing a long chain branch.

Polyethylene including the long chain branching may have a long chain branching index in the range of 0.23 to 0.55.

The additive for preventing burns may be calcium stearate and paraffin wax.

The functional additive may be one or more selected from the group consisting of a color master batch, an anti-aging agent, an antioxidant, and a flame retardant.

The manufacturing method of artificial turf yarn for preventing burns according to another embodiment of the present invention is 80 to 95% by weight of polyethylene, 0.1 to 5% by weight of compatibilizer, 1 to 10% by weight of additives for preventing burns, and 1 to 10% by weight of functional additives Is prepared by putting in a spinning machine and melt spinning.

The artificial turf structure for preventing burns according to another embodiment of the present invention is a base paper, a file tufted on the base paper, and a file composed of the above-described artificial turf yarn for preventing burns, and back-coated on the rear surface of the base paper so that the file is It includes a back coating to prevent it from being pulled out.

Using the artificial turf yarn for preventing burns according to the present invention, the method of manufacturing the same, and the artificial turf structure using the same, it is possible to reduce frictional heat generated due to friction with the human body, thereby preventing burns during play.

In addition, when manufacturing artificial turf yarn for preventing burns, there is an effect of improving work performance by additives for preventing burns.

1A and 1B are cross-sectional views of artificial turf yarn manufactured according to Comparative Example and Example 1. FIG.

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 denote the same reference numerals as possible. In describing the present invention, detailed descriptions of related known functions or configurations will be omitted so as not to obscure the subject matter of the present invention.

The terms about, substantially, etc. of the degree used in the present specification are used at or close to the numerical value when manufacturing and material tolerances inherent to the stated meaning are presented, and are used to help understanding the present invention. Absolute figures are used to prevent unfair use of the stated disclosure by unconscionable infringers

1 is a cross-sectional view of an artificial turf yarn for preventing burns according to an embodiment of the present invention.

The artificial turf yarn for preventing burns according to an embodiment of the present invention is 80 to 95% by weight of polyethylene, 0.1 to 5% by weight of compatibilizer, 1 to 10% by weight of additives for preventing burns, and 1 to 10% by weight of functional additives Including, the additive for preventing burns, paraffin wax (Paraffin wax), oxidized paraffin wax (Oxydiertes Paraffin), stearic acid (Stearic acid), cetyl alcohol (Cetyl alcohol), stearyl alcohol (Stearyl alcohol), GMS, GMO, Stearyl stearate, calcium stearate, magnesium stearate, zinc stearate, erucamide, oleamide, and steramide It includes at least one selected from the group consisting of.

The polyethylene is a chain-shaped hydrocarbon compound having one double bond, is a polymer compound synthesized by olefin polymerization, and is a basic component of the artificial turf yarn for preventing burns of the present invention.

The polyethylene may be one or more selected from the group consisting of Linear Low Density Polyethylene, Low Density Polyethylene, Medium Density Polyethylene, and High Density Polyethylene. have.

The polyethylene may have a density of 0.930 to 0.940 g/cm 3 and a melt index (MI) of 0.1 to 5 g/10min.

The polyethylene may contain 80 to 95% by weight based on 100% by weight of the total. If it is less than 80% by weight, there is a disadvantage that the uprightness and abrasion resistance of the artificial turf are deteriorated, and if it exceeds 95% by weight, the softness of the artificial turf There is a disadvantage in that the properties are deteriorated, and the above range is preferable.

The polyethylene is a polyethylene containing a long chain branch.

Since the polyethylene contains long-chain branches, the elasticity, durability and upright stability of the artificial turf yarn for preventing burns are improved.

In addition, the polyethylene containing the long-chain branch may be synthesized using a Ziegler-Natta catalyst or a metallocene catalyst, and preferably a metallocene catalyst may be used.

Polyethylene (including long-chain branches) synthesized using the metallocene catalyst can achieve a more uniform synthesis than polyethylene (including long-chain branches) prepared using Ziegler-Natta catalyst, which is the synthetic turf yarn for preventing burns. Physical and chemical properties can be further improved.

Polyethylene including the long-chain branch, that is, branched polyethylene has a narrow molecular weight distribution compared to general polyethylene, and the surface of the yarn is modified, thereby improving wear resistance.

Polyethylene including the long chain branching may have a long chain branching index in the range of 0.23 to 0.55.

If the additive long chain branching index is less than 0.23, the effect of improving the elasticity of the yarn is insignificant, and if it exceeds 0.55, there is a problem in that the elongation is lowered, and the above range is preferable.

The additives for preventing burns include Paraffin wax, Oxydiertes Paraffin, Stearic acid, Cetyl alcohol, Stearyl alcohol, Glycerol mono stearate. , GMS), Glycerol mono oleate (GMO), Stearyl stearate, Calcium stearate, Magnesium stearate, Zinc stearate, Erucamide ( Erucamide), oleamide (Oleamide), and may be one or more selected from the group consisting of steramid (Steride), preferably calcium stearate and paraffin wax.

The burn-preventing additive imparts releasability between the metal surfaces of the spinning machine to improve flowability in the manufacture of artificial turf yarn, as well as inducing inter-molecular flow by penetrating into the molecules of the polyethylene and causing chains to slide together. Do it.

In addition, the additive for preventing images is uniformly coated on the surface of the artificial turf yarn to reduce friction.

The artificial turf yarn for preventing burns according to an embodiment of the present invention may contain 1 to 10% by weight of an additive for preventing burns based on 100% by weight of the total amount of the additive for preventing burns. It may be insignificant, and if it exceeds 10% by weight, the polyethylene and the additives are not properly mixed, and there is a problem in that dimensional stability is deteriorated.

The functional additive may be one or more selected from the group consisting of a color master batch, an anti-aging agent, an antioxidant, and a flame retardant.

The color master batch, anti-aging agent, antioxidant, and flame retardant may be mixed and used in a 1:1:1:1 weight ratio, and the mixed functional additive may be included in an amount of 1 to 10% by weight relative to the total 100% by weight.

If the total content of the mixed functional additive is less than 1% by weight, the role as a functional additive is insignificant, and if it exceeds 10% by weight, there is a problem that the upright stability and elasticity of the yarn may be deteriorated, so the above range is preferable. .

The color master batch is for imparting the artificial turf with the same color as natural turf, and may be prepared by adding a pigment to a transparent resin in order to improve dispersibility.

Although the type of the transparent resin is not limited, it is preferable that it is a polyethylene resin most often included in the artificial turf yarn.

The anti-aging agent prevents the yarn from aging in solar heat, and may be phenylbetanaphthylamine.

The antioxidant can prevent the yarn from being embrittled by heat, and can improve heat resistance.

The flame retardant may be one or more selected from the group consisting of a phosphorus-based flame retardant, a metal hydrate-based flame retardant, a halogen-based flame retardant, a flame retardant aid, and a mixture thereof, but is not limited thereto.

The compatibilizer may be included in an amount of 0.1 to 5% by weight relative to the total 100% by weight, and the compatibilizer is maleic acid, maleic anhydride, maleic hydrazide, dichloro Dichloro maleic anhydride, unsaturation dicarboxylic acid, fumaric acid, citric acid, citric acid anhydride, malic acid and agaric acid acid) may be one or more selected from the group consisting of, specifically, maleic anhydride (polyethylene copolymer), but is not limited thereto.

By mixing the compatibilizer, it is possible to improve dispersibility and binding properties in the manufacture of artificial turf yarn, and there is an effect of reducing whitening of artificial turf yarn.

The manufacturing method of artificial turf yarn for preventing burns according to another embodiment of the present invention is 80 to 95% by weight of polyethylene, 0.1 to 5% by weight of compatibilizer, 1 to 10% by weight of additives for preventing burns, and 1 to 10% by weight of functional additives Can be prepared by putting into a spinning machine and melt spinning.

In the case of using calcium stearate and paraffin wax as additives for preventing burns in the manufacture of the artificial turf yarn for preventing burns, it is preferable to first add stearin calcium and then add paraffin wax.

The artificial turf structure for preventing burns according to another embodiment of the present invention is a base paper, a file tufted on the base paper, and a file composed of the artificial turf yarn for image prevention, and back-coated on the rear surface of the base paper so that the file is not pulled out. It includes a back coating to prevent.

The length of the pile composed of the artificial turf yarn for preventing burns based on the upper surface of the base paper may be 35 to 55 mm.

The base fabric may be at least one selected from the group consisting of polyolefin-based woven fabric, polyester-based woven fabric, and non-woven fabric, and specifically, the polyolefin-based woven fabric may be a polypropylene woven fabric.

The back coating part uses styrene butadiene rubber (SBR), polyurethane (Polyurethane, PU) latex (Latex) or polyethylene film (Polyethylene film), PET (Polyethylene terephthalate, PET) nonwoven fabric using a dry heat fusion method. Can be formed.

Since the back coating is a conventional technique, a description thereof will be omitted.

A filler may be further included between the pile and the back coating part.

The filler is a synthetic resin filler, and the synthetic resin filler may include at least one selected from the group consisting of styrene-ethylene-butadiene-styrene, ethylene vinyl alcohol, polypropylene, polyethylene, and nylon. Patent, it is better to include styrene-ethylene-butadiene-styrene, and the styrene-ethylene-butadiene-styrene can provide excellent shock-relieving function, and it is economical and exhibits an eco-friendly effect that does not contain sulfur or carcinogens. There is an advantage to be able to.

The size of the filler may be 2 to 3 mm, but is not limited thereto.

For the purpose of improving the upright stability and elasticity of the artificial turf structure for preventing burns of the present invention, it may be manufactured by varying the length of the yarn.

In the process of forming the pile part by tufting the yarn on the base material, the artificial turf structure may be manufactured by repeatedly differentiating the yarn lengths of the first needle and the second needle adjacent to the first needle.

Specifically, the length of the unit pile formed by the first needle may be 35 mm, and the length of the unit pile formed by the second needle may be 55 mm.

As described above, when the pile is formed with a difference in the length of the unit pile, the unit pile of short length (35 mm) can support the lower surface of the unit pile of 55 mm, so that the effect of improving upright stability and elasticity is improved. have.

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 contents of the present invention are not limited to the following examples.

Example 1

First, a linear low-density polyethylene having a long chain branching index of 0.3 was prepared.

Next, 800 g of linear low-density polyethylene, 40 g of maleic anhydride, 50 g of calcium stearate, 25 g of green master batch, 25 g of an aging agent, 25 g of an antioxidant, and 25 g of a flame retardant were mixed in a spinning machine.

Finally, 50 g of paraffin wax was further added and melt-spun into a spinning machine to prepare artificial turf yarn for preventing burns.

Example 2

It was prepared in the same manner as in Example 1, but using 50 g of oxidized paraffin wax instead of 50 g of paraffin wax to prepare an artificial turf yarn for preventing burns.

Example 3

In the same manner as in Example 1, but instead of linear low-density polyethylene having a long-chain branching index of 0.3, an artificial turf yarn was prepared using linear low-density polyethylene having a long-chain branching index of 0.4.

Example 4

The artificial turf yarn was prepared in the same manner as in Example 2, but using linear low-density polyethylene having a long-chain branching index of 0.4 instead of linear low-density polyethylene having a long-chain branching index of 0.3.

Comparative example

It was prepared in the same manner as in Example 1, but instead of linear low-density polyethylene having a long-chain branching index of 0.3, general linear low-density polyethylene was used, and artificial turf yarn was prepared excluding calcium stearate and paraffin wax.

Experimental example

Vertical deformation by using the artificial turf structure in which 33 Kg/m ² and 11 Kg/m ² of silica sand and fillers are installed per unit area, respectively, on artificial turf manufactured using the artificial turf yarn for burn prevention of Examples 1 to 4 and Comparative Examples , Rotational resistance, and measured in the measurement of the skin/surface friction coefficient, and are shown in Table 1 below.

division Vertical deformation (mm) Rolling resistance (N/m) Skin/surface friction coefficient Remark Quality standards 55mm: 3~1020mm:10 or less 25-50 0.35~1.00 Example 1 6.4 38 0.83 Example 2 6.2 37 0.83 Example 3 5.4 33 0.78 Example 4 5.1 33 0.75 Comparative Example 1 3.2 33 0.75

*Quality standards: Quality standards set by Korean industrial standards The vertical deformation is a measure of the degree of deformation that occurs in the vertical direction when a mass is vertically dropped on artificial turf, and the rotational resistance (N/m) is artificial It is a measurement of the grip force of the turf, and the skin/surface friction coefficient is a measure of the coefficient of friction between the artificial skin made of silicone and the artificial turf.

As can be seen in Table 1, it can be seen that both Examples 1 and 3 satisfy the quality criteria.

Therefore, when the artificial turf yarn for preventing burns according to the present invention, the manufacturing method thereof, and the artificial turf structure using the same, it is possible to reduce frictional heat generated by friction with the human body, thereby preventing burns during play.

Above, the present invention has been described in detail using preferred embodiments, but the scope of the present invention is not limited to specific embodiments, and should be interpreted by the appended claims. In addition, those who have acquired ordinary knowledge in this technical field should understand that many modifications and variations can be made without departing from the scope of the present invention.

100: polyethylene
200: additive for preventing burns

Claims (8)

80 to 95% by weight of polyethylene, 0.1 to 5% by weight of a compatibilizer, 1 to 10% by weight of an additive for preventing burns, and 1 to 10% by weight of a functional additive,
The polyethylene is a polyethylene containing a long chain branch,
The additive for preventing burns,
Calcium stearate and paraffin wax, characterized in that produced by adding the calcium stearate and then adding the paraffin wax,
Artificial turf yarn for preventing burns. In claim 1,
The polyethylene,
Characterized in that it is at least one selected from the group consisting of Linear Low Density Polyethylene, Low Density Polyethylene, Medium Density Polyethylene, and High Density Polyethylene.
Artificial turf yarn for preventing burns. delete In claim 1,
Polyethylene containing the long chain branch,
Characterized in that the long chain branching index (Long Chain Branching index) in the range of 0.23 ~ 0.55,
Artificial turf yarn for preventing burns. delete In claim 1,
The functional additive,
Characterized in that at least one selected from the group consisting of color master arrangement, anti-aging agent, antioxidant, and flame retardant,
Artificial turf yarn for preventing burns. 80 to 95% by weight of polyethylene, 0.1 to 5% by weight of a compatibilizer, 1 to 10% by weight of an additive for preventing burns, and 1 to 10% by weight of a functional additive are added to a spinning machine and melted
The polyethylene is a polyethylene containing a long chain branch,
The additive for preventing burns,
Calcium stearate and paraffin wax, characterized in that produced by adding the calcium stearate and then adding the paraffin wax,
Method of manufacturing artificial turf yarn for preventing burns. Bubble Paper,
A file composed of artificial turf yarn for preventing burns according to any one of claims 1, 2, 4, and 6, which is tufted on the base paper, and
It characterized in that it comprises a back coating portion to prevent the file from being pulled back coated on the back of the base paper,
Artificial turf structure for preventing burns.

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