KR101352414B1 - Artificial turf fiber and artificial turf using the same - Google Patents

Abstract

The present invention relates to yarn for artificial turf and artificial turf using the same, and more specifically, to artificial turf which is manufactured by weaving fibrillate yarn by adding carbon fiber to synthetic resin materials, provides tactility similar to natural grass, prevents injuries by reducing skin friction, improves elasticity restoring power, the erection of files, and abrasion resistance.

Description

Artificial Turf Fiber and Artificial Turf Using the same

The present invention relates to a yarn for artificial turf and artificial turf using the same.

As the quality of life improves, the desire for a pleasant environment and the desire for health promotion are increasing day by day. Accordingly, various sports facilities such as soccer field, baseball field, tennis court, gate ball field, and multi-purpose field using artificial turf are formed in various places, and the bottom surface of such sports facility is formed of artificial turf material so that the user is more comfortable with the above facilities. There is a trend to make them available.

Such artificial turf is mainly produced by planting various resins in the form of pile yarns, and has the advantage of not being restricted by environmental conditions by artificially forming grass, but its use is limited because it is inferior to natural grass in texture. It became.

In recent years, however, the use of fibril to mitigate frictional forces minimizes the splashing of the filler, and evenly spreads the filler so that there is almost no change in the flatness of the entire land. Technology has been developed in such a way.

Since the yarn conditions are determined according to the durability and orientation of the raw material itself, the raw material for artificial turf and its composition are very basic and important factors.

The resin used as the raw material for artificial turf is polypropylene, nylon, and the like, which is melt-spun and processed into monofilament. The rubber is coated on these surfaces to improve physical properties as artificial turf.

The polypropylene yarn for artificial turf is relatively economical compared to nylon, so the cost is reduced and used as a popular product, but the photodegradation rate due to ultraviolet light is rather high.
In addition, the nylon yarn for artificial turf is excellent in tensile strength, wear resistance and bending recovery, and low strain due to ultraviolet rays of sunlight, but has a disadvantage of poor bulkiness.
In recent years, artificial turf using polyethylene yarn has emerged to supplement the above problems.
As an example of artificial turf using the polyethylene yarn, Korean Patent Registration No. 10-1028574 (artificial turf yarn composition and yarn using the same) has been presented.
The artificial turf yarn composition and the yarn using the same are formed in the form of fibrillate using a composition having a linear low density polyethylene and a medium density polyethylene having a composition ratio of 80:20 to 20: 80% by weight, showing a soft touch like natural grass. There is also an advantage in having tensile strength, weather resistance, wear resistance and uprightness.
However, since the artificial turf yarn composition and the yarn using the same are formed mainly from polyethylene yarns such as linear low density polyethylene and medium density polyethylene, they are excellent in bulkiness, which is soft to the touch, and used in various products. As a material, in particular, it is used for sports grounds, sports facilities, landscaping, etc., but there is a weak strength, such as wear resistance.

Republic of Korea Patent Registration No. 10-1028574 (Registration Date: 2011.04.04)

The main object of the present invention is to provide an artificial turf yarn and artificial turf using the same, which is similar to natural grass, and can prevent injury by minimizing skin friction, and excellent elastic recovery power and upright on pile. have.

The present invention also provides an artificial turf yarn having a variety of colors and adsorption functions, and artificial turf using the same, having excellent dyeing properties without dyeing defects such as staining and staining even when the carbon fiber has a high mixing ratio.

In order to achieve the above object, one embodiment of the present invention provides a yarn for artificial turf formed of a composition containing 1 to 50 parts by weight of carbon fiber based on 100 parts by weight of the synthetic resin raw material.

In a preferred embodiment of the present invention, the synthetic resin raw material may be characterized in that at least one member selected from the group consisting of nylon, polypropylene and polyethylene.

In a preferred embodiment of the present invention, the yarn for artificial turf is a fibrillated yarn having a width of 10 to 15mm, a thickness of 100 to 200㎛, and the fibrillate width of each fiber in the longitudinal direction 0.1 to 2mm And, 3 to 10 cuts per width (cut) is two repeating units in the longitudinal direction, the number of twists can be characterized in that 30 to 40 twists / inch.

Another embodiment of the present invention provides an artificial turf using the yarn for artificial turf.

In another preferred embodiment of the present invention, the artificial turf may be characterized in that it further comprises a monofilament yarn having a thickness of 200 to 400㎛ made of a synthetic resin raw material.

According to the present invention, the touch is similar to natural grass, minimizes skin friction to prevent injury, excellent elastic recovery and pile upright, but also excellent wear resistance, staining stains even when the mixing ratio of carbon fiber is high It is excellent in dyeing ability without dyeing defects such as to provide an artificial turf having a variety of colors and functions.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is well known and commonly used in the art.

Throughout this specification, when a part is said to "include" or "include" a component, it means that it can further include other components, except to exclude other components unless specifically stated otherwise. do.

The present invention relates to a yarn for artificial turf formed from a composition containing 1 to 50 parts by weight of carbon fiber with respect to 100 parts by weight of synthetic resin raw material in one aspect.

More specifically, the present invention by producing a synthetic turf yarn in the form of fibrillated yarn by containing a specific amount of carbon fiber in the synthetic resin raw material, the touch is similar to natural grass, can minimize the skin friction power to prevent injury In addition, it is possible to provide an artificial grass having excellent elastic recovery power and upright on pile while excellent wear resistance.

The synthetic resin raw material may be used without limitation as long as it is a synthetic resin that can be used as a yarn for artificial turf conventionally, preferably at least one selected from the group consisting of nylon, polypropylene and polyethylene in terms of compatibility with carbon fiber, processability and price. Can be.

The carbon fiber may be obtained from any raw material such as pitch, rayon or polyacrylonitrile, or may be one of high strength type (low modulus carbon fiber), used elastic carbon fiber or ultra high elastic carbon fiber, It is not limited to.

In addition, the carbon fiber may include not only carbon fiber made of 100% carbon fiber, but also all carbon fiber made by mixing other fibers with carbon fiber, for example, mixed with Doc fiber, hemp fiber, manila fiber, etc. It can also be used.

In general, carbon fiber has excellent properties such as high strength, high elasticity, high thermal properties, chemical resistance, light weight, and adsorptivity, and thus, has become a main material in all industries such as civil engineering, electrical and electronics, machinery, and ships. When the interfacial bonding strength with the raw material for grass synthetic resin was poor, when mixed with the resin, the mechanical properties were lowered, and the excellent physical properties of the carbon fibers could not be sufficiently exhibited.

In particular, due to the intrinsic color of the carbon fiber, that is, black, the dyeing defects appear black due to the mixing ratio and dispersion of the carbon fiber has a difficulty in using as a material for artificial turf.

Accordingly, in the present invention, by modifying the surface of the carbon fiber with a silane-based compound to improve the interfacial bonding strength and dispersibility with the raw material of the synthetic resin, it is possible to fully exhibit the excellent physical properties of the carbon fiber and at the same time improve the mechanical properties of the artificial grass In addition, due to the inherent color of the carbon fiber or the miscibility of dyeing due to the carbon fiber, it is possible to provide a yarn for artificial turf of various colors with excellent dyeability without dyeing defects such as staining.

In addition, the yarn for artificial turf according to the present invention can also obtain the effect of preventing the fine dust is dispersed in the air by adsorbing the fine dust present in the sports facilities due to a number of pores on the surface of the carbon fiber.

The carbon fiber reforming method may be pretreated with an acid such as nitric acid, phosphoric acid, hydrochloric acid, etc. to remove impurities on the surface of the carbon fiber before reforming, and may be modified for 1 to 60 minutes by adding to a silane compound. If it is carried out in less than 1 minute, the surface modification of the carbon fiber is not made properly, and if it exceeds 60 minutes, the coating of the carbon fiber is damaged and can not sufficiently exhibit the excellent physical properties of the carbon fiber.

In this case, as the silane-based compound capable of modifying the carbon fiber surface, glycidyl ether trimethoxy silane, β (-3,4-epoxy cyclohexyl) ethyl trimethoxy silane, N-beta- (aminoethyl)- Gamma-aminopropylmethyldimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, gamma-aminopropylmethyldiethoxysilane, gamma-aminopropyltriethoxysilane, gamma-aminopropyltri Methoxysilane, bis (3-triethoxysilylpropyl) tetrasulfite, gamma-chloropropyltriethoxysilane, gamma-chloropropyltrimethoxysilane, gamma-glycithoxypropyltrimethoxysilane, gamma-mer Cettopropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, methyltriacetoxysilane, methyltrimethoxysilane, methyl tris- (butanone oxime) silane, methyloxyminosilane, methyl tris- (methyl Ethyl methoxymo) silane, phenyl Tris- (butanone oxime) silane, phenyl oxymino silane, phenyl tris- (methylethyl methoxymo) silane, tetraethoxysilane, tetra (methylethyl methoxymo) silane, tetramethoxysilane, vinyltriethoxysilane, At least one selected from the group consisting of vinyl trimethoxysilane, vinyl tris- (butanone oxime) silane, vinyl oxymino silane, and vinyl tris- (methylethylketoxymo) silane, the content of which is modified carbon fiber If it is sufficient amount can be used without limitation, in terms of the effect on the content, preferably from 10 to 70 parts by weight based on 100 parts by weight of carbon fiber.

The carbon fiber modified as described above may contain 1 to 50 parts by weight based on 100 parts by weight of the synthetic resin raw material to provide a composition for artificial turf yarn. At this time, with respect to 100 parts by weight of the synthetic resin raw material, when the carbon fiber is contained less than 1 part by weight, the effect is insignificant compared to the carbon fiber content, and when the content exceeds 50 parts by weight, the synthetic resin raw material is less content may be rather deteriorated have.

In addition, the present invention may further add pigments, absorbers, ultraviolet stabilizers, antioxidants, silicone additives, and the like to the artificial turf fiber composition. In this case, the pigment may be added in an amount of 1 to 10 parts by weight based on 100 parts by weight of the composition to impart color, such as natural grass, and the UV stabilizer to prevent the production of amine which is a yarn decomposition promoting material during UV irradiation. 1,000 to 10,000 ppm may be added based on 1 kg of the composition, and the antioxidant may be added to 100 to 500 ppm based on 1 kg of the composition to prevent heat embrittlement of the yarn by heat, thereby improving heat resistance. The silicone resin may be added to improve the processability of the extrusion or injection process and the soft touch of the yarn after the raw material composition.

Additives added to such artificial turf yarn-based compositions satisfy the above-mentioned range, it can satisfy the characteristics required for grass not only in excellent durability and tear strength, toughness, but also soft touch.

On the other hand, in general, the artificial turf yarn is selected from a single monofilament yarn, mono tape or fibrill yarns, there is a problem that each has its disadvantages as it is revealed. Specifically, piles composed solely of monofilament yarns or monotape have good durability, but the loss of rubber chips is severe and not soft, and piles composed of fibrillated yarns have less loss and softness of rubber chips, but the durability is not good. there was.

In addition, artificial turf that has been tufted to bubble paper by twisting piles of monofilament yarns and fibrillated yarns has been proposed. However, the fibrillated yarns are weak and easily damaged or cut so that the quality is lower than that of a single monofilament yarn. There is an excessive problem of management costs.

Accordingly, in the present invention, by using the artificial turf yarn composition containing the carbon fiber to supplement the durability of the fibrillated yarn, it is possible to prevent injuries because the pile does not lie on the side while being soft like natural grass. Physical properties such as durability and wear resistance can be improved.

The fibrillated yarn may have a width of 10 to 15 mm and a thickness of 100 to 200 μm for extrusion. When the fibrillated yarn is separated in the longitudinal direction, the width per fiber is 0.1 to 2 mm. It is preferable that the number of twists is 30 to 40 twists / inch, with 3 to 10 cuts per width, and 2 repeat units in the longitudinal direction.

When the thickness of the fibrillated yarn is less than 100 μm and the width of each fibrate is less than 0.1 mm when separated in the longitudinal direction, the uprightness of the fibrate is reduced to the artificial turf, and the thickness of the yarn exceeds 200 μm, When the fibrate is more than 2mm wide when separated in the direction, the artificial turf feel may become stiff.

The present invention relates to an artificial turf manufactured using the yarn for artificial turf in another aspect.

The artificial turf yarn prepared as described above may form an artificial turf by mixing monofilament yarns having a thickness of 200 to 400 μm, which are made of only synthetic resin raw materials to prevent the pile of artificial turf from lying on its side. In this case, the monofilament yarn may have a shape similar to a leaf of grass, and may prevent the movement of the rubber chip by satisfying the thickness of the above range, and may have an appropriate hardness and flexibility.

Artificial grass can be formed using the yarn described above as follows.

First, a tufting method, a weaving method, a mocket method, a piece (× raschel) method, etc., are placed on top of a substrate that is commonly used when manufacturing artificial turf such as a permeable ascon base layer and crushed stone. To complete the artificial turf. At this time, the density of the pile is a total length × 13,000 to 22,000 / m ² in the horizontal × vertical, when out of the range, there may be a problem that the expression of elastic recovery is not satisfactory.

The artificial turf file is preferably used by mixing the fibrillated yarn 1 to 4 strands or the fibrillated yarn 1 to 2 strands and monofilament yarn 1 to 4 strands. If four fibrillated yarns or four fibrillated yarns and four monofilament yarns are exceeded, hooks, knives or needles of the weaving machine are subject to damage and are frequently replaced. Low weaving speed and density is not preferred because there is a problem that the quality of the artificial turf falls.

On the other hand, in the present invention can be used mixed with artificial grass and natural grass, when using artificial turf mixed with natural grass, it is preferable to attach an elastic rubber pad to the bottom of the artificial turf so as not to break between each other, In addition, it is possible to prevent the break in the joint portion by various known methods.

In addition, artificial turf and natural grass may be alternately formed at a predetermined interval, more preferably 4 to 28m apart may be alternately formed.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to the following Examples.

≪ Example 1 >

300 g of carbon fiber (Toray Co., T700 12k) was pretreated with 0.1 M HNO ₃ for 30 minutes to remove impurities from the surface of the carbon fiber, and the impregnated carbon fiber was N-beta- (aminoethyl) -gamma-aminopropyl. Charged into 150 g of methyldimethoxysilane, the carbon fiber surface was modified for 30 minutes. The modified carbon fiber was mixed with 750 g of polyethylene, and then sufficiently melted at 240 ° C. using a heating press, and then UV stabilizer 7,500 ppm, antioxidant 750 ppm and 20 g of pink dye (Synozol Red HF-3B, KISCO) or blue dye ( 20 g of Sun.N / Blue H-ER) was added and extruded to form a fibrillated yarn. In this case, the fibrillated yarn has a width of 12mm, a thickness of 120㎛, when separating the fibrillates in the longitudinal direction is 1mmfh for each fiber, 5 cuts per width, two repeats in the longitudinal direction A total of twelve units and twists were made from fibrillated yarns with 30 to 40 twists / inch.

Four fibrillated yarns thus prepared were tufted to 55 mm in the bubble layer by alternating two strands on top of the permeable ascon base layer to form a pile. The density of pile was 18,623 pieces / m ² in total length and width.

<Example 2>

It was prepared in the same manner as in Example 1, but artificial turf was manufactured using nylon instead of polyethylene.

<Example 3>

Prepared in the same manner as in Example 1, but instead of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane to modify the carbon fiber using glycidyl ether trimethoxysilane to prepare artificial grass It was.

<Example 4>

It was prepared in the same manner as in Example 1, but artificial turf was prepared by alternately tufting two strands of monofilament yarn and one fibrillated yarn made of polyethylene with a thickness of 200 μm.

&Lt; Comparative Example 1 &

It was prepared in the same manner as in Example 1, but artificial turf was manufactured using a fibrillate yarn containing no carbon fiber.

Comparative Example 2

Prepared in the same manner as in Example 1, but artificial turf was prepared using a fibrillated yarn containing unmodified carbon fiber.

&Lt; Comparative Example 3 &

Prepared in the same manner as in Example 2, but artificial turf was prepared using a fibrillated yarn containing unmodified carbon fiber.

&Lt; Comparative Example 4 &

It was prepared in the same manner as in Example 1, but artificial turf was manufactured using fibrillated yarn prepared by adding 530 g of carbon fiber.

The physical properties of the artificial turf prepared in Examples 1 to 4 and Comparative Examples 1 to 4 were respectively measured.

(1) Wear resistance measurement

Collect at least three round specimens of approximately 130mm in diameter, drill a 6mm diameter hole in the center, and install the specimen on the sample holder with the surface of the specimen facing upward in the abrasion strength tester. Using 38 wheels, it was subjected to rotational rubbing at about 70 rpm at 3,000 rotations as opposed to the direction of rotation of the test piece. At this time, the weight reduction is measured by the friction loss, the average value is displayed to three significant figures.

Wear rate (%) = {(weight before test (g)-weight after test (g)) / weight before test (g)} × 100

(2) compression recovery rate measurement

Three specimens for each sample were taken and measured, and three average values were taken as the measurement of the sample. The compression rate and recovery rate were calculated by the following equation. At this time, each sample was taken from the left, middle and right of the artificial turf. The cell was placed on the sample and the initial height was measured to obtain an A value. This sample was left to stand for 24 hours with a metal pillar of weight 8300 g and a diameter of 60 mm (maintain the standard atmosphere). The pile height at that time was measured after 24 hours, and it was set as B value. After leaving the measured test piece again for 5 minutes, the pile height at that time was measured and it was set as C value.

Compression Ratio: ｛(A-B) / A｝ * 100

Recovery rate: ｛(C-B) / (A-B)｝ * 100

(3) tactile measurement

Touching feelings of ten inspectors in textile research were evaluated as follows.

◎: soft, △: slightly soft, ×: stiffness

(4) dyeability measurement

Ten inspectors engaged in textile research were visually judged and evaluated as follows.

(Circle): Good state without dyed stain, X: State with dyed stain

division Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Wear rate (%) 0.10 0.05 0.08 0.10 5.89 2.51 2.51 0.98 Compression Ratio (%) 94.00 91.24 93.49 94.00 91.50 89.13 88.79 81.30 Recovery rate (%) 93.24 95.63 93.96 93.24 84.45 87.22 89.45 85.91 touch ◎ ◎ ◎ ◎ ◎ △ △ △ Dyeability ○ ○ ○ ○ ○ × × ×

As shown in Table 1, it can be seen that the yarn for artificial turf according to the present invention exhibits the highest compression recovery rate, and also has excellent wear rate, dyeing property, and feel.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

Yarn for artificial turf formed of a composition containing 1 to 50 parts by weight of carbon fiber with respect to 100 parts by weight of synthetic resin raw materials.
The synthetic grass yarn of claim 1, wherein the synthetic resin raw material is at least one selected from the group consisting of polypropylene, nylon, and polyethylene.
The yarn for artificial turf according to claim 1, wherein the carbon fiber is modified with a silane compound.
The method of claim 1, wherein the artificial grass yarn is a fibrillated yarn having a width of 10 to 15mm, a thickness of 100 to 200㎛, the fibrillates in the longitudinal direction of 0.1 to 2mm per fiber, Yarn for artificial turf, characterized in that two repeating units in the longitudinal direction with 3 to 10 cuts per width, the number of twists is 30 to 40 twists / inch.
Artificial turf produced using the yarn for artificial turf of any one of claims 1 to 4.
The artificial turf according to claim 5, wherein the artificial turf further comprises a monofilament yarn having a thickness of 200 to 400 µm made of a synthetic resin raw material.