KR101103007B1 - Artificial turf fiber using Poly trimethyleneterephthalate and Structure of composite artificial turf - Google Patents

Abstract

The present invention in the artificial turf yarn made of polytrimethyleneterephthalate (PTT), the cross section of the artificial turf yarn has a long axis L, a thickness S of the long axis in a flat shape, the radius R (2S> R≥S) in the center of the circular arc ( Iii) two or more first projections protruding up and down are formed, and two or more second projections protruding up and down an arc having a radius r (R> r> S / 2) on both sides of the first projection are symmetrical. It provides an artificial turf yarn using a PTT characterized in that it is formed.

Artificial turf, spinneret, polytrimethylene terephthalate, artificial turf structure

Description

Artificial turf fiber using Poly trimethylene terephthalate and Structure of composite artificial turf}

The present invention relates to an artificial turf yarn using poly trimethyleneterephthalate (PTT) and an artificial turf structure using the artificial turf yarn, and more particularly, excellent elasticity using a modified spinneret. The present invention provides artificial turf yarns using PTT and excellent artificial turf structure using the PTT having excellent recovery rate, abrasion resistance, and pile uprightness.

In general, artificial turf has been used mainly in sports fields of ball games or general sports grounds since it was first produced in the United States to compensate for the disadvantages of natural grass.

Such artificial turf is always green and is not restricted by environmental conditions, so it is easy to manage after construction. Artificial turf ball with artificial turf has higher initial construction cost than general natural turf, but it is more preferred than natural turf due to its semi-permanent use, ease of maintenance, and smooth surface for exercise. In artificial turf for sports, artificial turf was used as a means to absorb the impact of athletes and to secure a series of appropriate performances, such as tooling, splashing, and speed change after the ball was bound to the ground. .

Such artificial turf has been continuously developed to standardization with the development of synthetic resin material technology and introduction of FIFA standard, which is a quality certification system of artificial turf called FIFA quality concept.

Up to now, artificial turf has developed a raw material which is similar to natural grass and at the same time more durable than natural grass. Early artificial grass yarns were crimped polyamide-based nylon 6 (Nylon 6) yarns that were tough and had excellent weather resistance and abrasion resistance. There was a danger. Subsequently, the artificial turf using polypropylene yarn was developed to reduce the surface friction, but it was difficult to implement sliding characteristics, which are similar to natural grass, and did not show satisfactory performance in wear resistance and elastic recovery rate compared to nylon 6. It was.

Recently, using a material such as polyvinylidene chloride, polyethylene, nylon, or polypropylene, a cross section of artificial turf yarn is made into a heteromorphic cross section or surface treatment to change the degree of polymerization and molecular weight of the synthetic grass to have a similar feel to natural grass. Various manufacturing methods and processing methods, such as a method of changing physical properties, have been developed, and many kinds of artificial turf have been released.

However, the artificial turf developed so far has a problem that the uprightness and elastic recovery rate are deteriorated when it is similar to the feel of natural grass, and the artificial turf with good uprightness and elastic recovery rate satisfies both touch, uprightness and elastic recovery rate due to the poor touch. The development of artificial turf is required.

In order to solve the above problems, an object of the present invention is to use a PTT similar to the natural turf similar to natural turf and to minimize the skin friction to prevent injury, excellent elastic recovery rate and pile upright artificial turf excellent wear resistance To provide the yarn.

Still another object of the present invention is to provide an artificial turf structure having excellent shock absorption by using the artificial turf yarn.

The present invention in the artificial turf yarn made of polytrimethyleneterephthalate (PTT), the cross section of the artificial turf yarn has a long axis L, a thickness S of the long axis in a flat shape, the radius R (2S> R≥S) in the center of the circular arc ( Iii) two or more first protrusions protruding up and down are formed, and a second protrusion protruding upward and downward from an arc having a radius r (R> r> S / 2) on both sides of the two or more first protrusions. It provides an artificial turf yarn using PTT characterized in that two or more are formed symmetrically.

In addition, the PTT is made of terephthalic acid and 1,3-propanediol, the 1,3-propanediol provides an artificial turf yarn using PTT, characterized in that extracted from natural materials.

In addition, the density of the PTT is 1.3 ~ 1.4g / ㎠, Tg is 50 ~ 80 ℃ and Tm provides an artificial turf yarn using PTT, characterized in that 225 ~ 235 ℃.

In addition, the artificial turf yarn is 100 ~ 800D / 1F, provides an artificial turf yarn using a PTT characterized in that the crimp rate is 25 to 40%.

In addition, the thickness of the artificial turf yarn provides an artificial turf yarn using a PTT, characterized in that 50 ~ 400㎛.

In addition, there is provided an artificial turf structure using the artificial turf yarn.

In addition, the artificial turf structure provides an artificial turf structure using a PTT, characterized in that consisting of artificial turf pile made of artificial turf yarn, and the ground tissue on which the artificial turf file is planted.

In addition, there is provided an artificial turf structure using a PTT, characterized in that consisting of an elastic pad layer for adjusting the artificial turf pile at the bottom of the paper tissue.

In addition, the elastic pad layer is PTT, characterized in that formed of at least one selected from latex (latex), expanded poly propylene (EPP), styrene-butadiene rubber (SBR), polyvinyl chloride (PVC), PU (polyurethane) It provides an artificial turf structure using.

In addition, the length of the artificial grass pile provides an artificial turf structure using a PTT, characterized in that 5 ~ 70mm.

In addition, in the artificial turf yarn spinneret made of polytrimethyleneterephthalate (PTT), the spinneret has a length L ₁ , a thickness D of the long axis in a flat shape, the radius R ₁ (2D> R ₁ ≥ D) in the center Two or more first projection grooves having an arc projecting upward and downward are formed, and an arc having a radius R ₂ (R ₁ > R ₂ > D / 2) is formed on both sides of the two or more first projection grooves. Provides artificial turf yarn spinneret using a PTT, characterized in that two or more second projection grooves protruding symmetrically formed.

In addition, the spinnerets for deformed cross-section is the length of the interval between the first projection groove L ₂ from the center of the projection groove, the length of the interval between the first projection groove and the second projection groove L ₃ from the center between the projection grooves The length of the interval between the second projection groove is L ₄ from the center between the projection groove, and provides the artificial turf yarn spinneret using a PTT characterized by satisfying the following conditional formulas (1) to (4) .

(1) 4R ₁ > L ₂ > 2R ₁

(2) 2R ₁ > L ₃ > R ₁ + R ₂

(3) R ₁ + R ₂ > L ₄ > 2R ₂

(4) 20> L ₁ / D> 15

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, specific descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used in this patent specification, the terms about, substantially, etc., are used at, or in close proximity to, the numerical values of the preparations and material tolerances inherent in the meanings indicated, and are intended to aid understanding of the invention. Or absolute figures are used to prevent unfair use of unscrupulous infringers.

The present invention relates to artificial turf yarns using polytrimethylene terephthalate (hereinafter PTT) used in microfibers and latent crimps for automobile seats and apparel, and artificial turf structures using the same.

PTT is generally synthetic resin of terephthalic acid and 1,3-propanediol. It has excellent elastic recovery ability, chemical resistance, environmental resistance, and touch, which are essential characteristics of artificial turf, and is cheaper than other synthetic resins, so it is more competitive in price but has different wear resistance. As a result, it has not been used as an artificial turf material.

In the present invention, the artificial turf yarn is manufactured by producing a characteristic release cross section to improve wear resistance.

1 is a cross-sectional view of the artificial turf yarn using the PTT according to the present invention is a cross-section of the artificial turf yarn 100 of the present invention in a flat shape having a length L, a thickness S of the major axis, the radius R (2S> R≥S) in the center Two or more first protrusions 102 having a circular arc protruding upward and downward are formed, and arcs having a radius r (R> r> S / 2) protrude upward and downward on both sides of the two or more first protrusions 102. Two or more second protrusions 104 are formed symmetrically.

Artificial turf yarn 100 having the above-described cross-sectional cross section is formed in the shape of the protruding protrusions arc arc so that the touch is improved and the first protrusion 102 in the center to maintain the upright state of the yarn, the second protrusion 104 is upright It helps to thin the tip of the yarn and softens the bending property and feel.

In order to manufacture the above-described cross-section artificial grass yarn, it can be produced using a spinneret as shown in FIG.

The spinneret is a discharge port that determines the shape of the filament during spinning. In general, the spinning apparatus forms a plurality of spinnerets to form a plurality of filaments and spins them at once.

Figure 2 is a cross-sectional view of a spinneret for release cross-section according to a preferred embodiment of the present invention, the spinneret for release cross-section for manufacturing artificial turf yarn made of PTT in the present invention 200 is flat as shown in FIG. At least two first projection grooves 202 having a length L ₁ and a thickness D of the major axis and protruding upward and downward from an arc having a radius R ₁ (2D> R ₁ ≥D) are formed. Two or more second projection grooves 204 having a radius R ₂ (R ₁ > R ₂ > D / 2) protruding upward and downward are formed symmetrically on both sides of the first projection grooves 202.

In addition, the spinnerets for deformed cross-section is the length of the interval between the first projection groove L ₂ from the center of the projection groove, the length of the interval between the first projection groove and the second projection groove L ₃ from the center between the projection grooves And, the length of the interval between the second projection groove is L ₄ from the center between the projection groove, it can be prepared by the following condition formula (1) to (4).

(1) 4R ₁ > L ₂ > 2R ₁

(2) 2R ₁ > L ₃ > R ₁ + R ₂

(3) R ₁ + R ₂ > L ₄ > 2R ₂

(4) 20> L ₁ / D> 15

When L ₂ is larger than 4R ₁ or L ₃ is larger than 2R ₁ , or L ₄ is larger than R ₁ + R ₂ , overall physical properties such as tensile strength of the manufactured artificial yarn are lowered. The uprightness and the elastic recovery force are reduced.

In addition, when L ₂ is smaller than 2R ₁ , or when L ₃ is smaller than R ₁ + R ₂ , or when L ₄ is smaller than 2R ₂ , the uprightness and elasticity of the artificial turf yarn manufactured are improved. It's too rigid and hard to bend, and it's stiff so it feels poor.

PTT used in the present invention is prepared by the conventional method of terephthalic acid and 1,3-propanediol, but the 1,3-propanediol used as a raw material of the PTT of the present invention using a chemical extracted from petroleum Glycerol extracted from plants, which are environmentally friendly materials such as olive and corn, are produced using Citrobacter, Clostridium, Ilyobacter, Klebsiella, and Lactobacillus. ), And Pelobacter (Pelobacter) is an environmentally friendly extraction method produced by fermentation from bacteria strains.

Since the chemical method is expensive and generates wastes containing environmental pollutants, 1,3-propanediol used in preparing PTT used in the present invention is extracted using environmentally friendly bacterial strains. It would be preferable to use 1,3-propanediol.

In addition, the physical properties of the PTT made of terephthalic acid and 1,3-propanediol has a density of 1.3 ~ 1.4g / ㎠, Tg 50 ~ 80 ℃ and Tm 225 ~ 235 ℃ It is radioactive and artificial turf Excellent elastic recovery rate and feel after yarn production.

Artificial turf yarn using PTT manufactured using the spinneret for release cross-section is produced in 100 ~ 800D (Denier) per 1F (filament) and the artificial turf yarn according to the place used when manufacturing the artificial grass pile It is prepared by tying 8 ~ 20F. In addition, the crimp rate of the artificial turf yarn will be preferable to be produced in 25 to 40%.

In addition, the thickness of the artificial grass yarn is excellent in physical properties and the elastic recovery rate that the thickest portion is radiated to 50 ~ 400㎛.

Artificial turf structure can be manufactured using the artificial turf yarn using the PTT.

Figure 2 is a cross-sectional view of one embodiment of the artificial turf structure using the artificial turf yarn using the PTT of the present invention artificial turf structure 300 using the artificial turf yarn using the PTT of the present invention artificial turf pile 302 made of artificial turf yarn And, the artificial turf pile is planted with a paper tissue 304, the elastic pad layer 306 for adjusting the artificial grass pile can be further formed at the bottom.

The artificial grass pile 302 can be produced by weaving 8 ~ 20F according to the place where the artificial turf yarn using the PTT as described above.

In addition, although the length of the artificial turf pile 302 varies depending on the location used, it will be preferable to have a length of generally 5 ~ 70mm.

The branched structure 304 is a place where the artificial turf pile 302 is planted so that the artificial turf pile may be fixed, and a plain fabric made of synthetic resin such as polypropylene, nylon, and polyester may be used.

In order to firmly fix the artificial turf pile 302 planted in the paper tissue 304, an elastic pad layer 306 is formed at the bottom of the artificial turf pile 302 in which the tissue tissue 304 is planted to fix the artificial turf pile and the shock absorbency of the artificial turf structure Can be improved.

The elastic pad layer 306 may include latex (latex), expanded poly propylene (EPP), styrene-butadiene rubber (SBR), polyvinyl chloride (PVC), polyurethane (PU), and the like, and the height of the elastic pad layer 306 is 10 It is preferable that it is to 25 mm.

When the artificial turf pile 302 is longer or the elastic pad layer 306 becomes thicker, ball roll and ball rebound are lowered and shock absorbency is increased. On the contrary, the artificial turf pile 302 is shortened or the elastic pad layer 306 is reduced. As the thickness becomes thinner, the ball cloudiness, the ball rebound property increases, and the impact absorbency decreases, thereby controlling the ball cloudiness, impact absorbency, and ballboundity of the artificial turf structure 300 by controlling the length of the artificial turf pile 302 and the thickness of the elastic pad layer 306. Can be.

In the artificial turf structure of the present invention, it is possible to impart the shape stability of the artificial turf pile by using a filler such as a vegetable material such as cork or a mineral material such as silica or synthetic rubber between the artificial turf piles, and further increase the shock absorbency. will be.

The present invention is excellent in elastic recovery force, chemical resistance, environmental resistance, touch, etc., and excellent price competitiveness than other synthetic resins, but abrasion resistance by using a PTT that is not used as a material for artificial turf yarn due to abrasion resistance It is effective to manufacture artificial grass yarn by improving the

In addition, the artificial turf yarn using the PTT of the present invention is similar to the feel of natural grass, but can be produced excellent artificial turf with excellent erectivity and elastic recovery rate, it is possible to produce an excellent artificial turf structure.

Examples of the artificial turf yarn using the PTT of the present invention are shown below, but are not limited thereto.

Example

1,3-propanediol extracted from terephthalic acid and natural materials to prepare a PTT having a density of 1.3 ~ 1.4g / ㎠, Tg 50 ~ 80 ℃ and Tm 225 ~ 235 ℃ and the artificial turf yarn Was prepared.

The spinneret was formed as R1 = D, R2 = 0.75R1, L2 = 2.5R1, L3 = 2.2R1, L4 = 1.9R1, L1 / D = 16.

The artificial turf pile manufactured by the artificial turf yarn using the artificial turf yarn using the manufactured PTT, the ground tissue on which the artificial turf pile is planted, and an elastic pad layer for adjusting the artificial turf pile at the bottom of the ground tissue An artificial turf structure consisting of was prepared.

The paper tissue was a plain woven fabric of polypropylene fibers, and the elastic pad layer was made of latex.

Comparative Example 1

Artificial turf yarns were manufactured using a general square spinneret using PTT, and artificial turf structures were manufactured in the same manner as in the artificial turf yarns manufactured.

Comparative Example 2

Nylon 6 was used to manufacture artificial turf yarns using a general square spinneret, and artificial turf structures were manufactured in the same manner as in the example of artificial turf yarns.

Comparative Example 3

The artificial turf yarn was manufactured using the spinneret of FIG. 1 using nylon 6, and the artificial turf structure was manufactured in the same manner as in the artificial turf yarn.

Comparative Example 4

Artificial turf yarns were prepared using general square spinneret using PET (polyethyleneterephthalate), and artificial turf structures were prepared in the same manner as in the artificial turf yarn.

1. Wear Resistance Measurement Experiment

*Test Methods

Collect at least three circular specimens of approximately 130 mm in diameter, drill a 6-mm diameter hole in the center, and place the specimen surface upward on the taper abrasion strength tester. Using the wheel of the H-38, rotate and rub it against the direction of specimen rotation at about 70 rpm.

* Abrasion resistance (%) = ｛(Weight before test (g)-Weight after test (g)) / Weight before test (g)｝ * 100

Table 1 shows the wear resistance of each artificial turf structure prepared in Comparative Examples 1,2 and Examples.

division Wear resistance (%) Comparative Example 1 0.15 Comparative Example 2 0.07 Example 0.02

As shown in Table 1, the artificial turf structure made of artificial turf yarn using PTT according to the present invention has the smallest difference in weight before and after the test, and thus shows the best wear resistance.

2. Skin Friction Experiment

* Experimental method

This experiment is a test method according to the standard of FIFA 08 / 05-01. The tester uses Securisport sports surface tester prescribed in FIFA.

The artificial skin uses silicone artificial skin L7350 Sonnentalstrasse 8600 DUEBENDORF, Switzerland manufactured by Maag Technic AG. At this time, the unused artificial skin should have an average load of 5 ± 0.3N measured on skin abrasion.

To prevent the specimen from moving during the test, attach the specimen to the floor of the laboratory, and attach the artificial artificial skin to the test foot of the Securisport Sport Surface Tester using double-sided tape and install it on the tester. Adjust the test foot so that the test foot is positioned directly above the specimen. Thereafter, contact with artificial skin should be prohibited. Place the tester on the specimen, level it, place a 100 N ± 10 N vertical load on the test foot, and rotate the test foot. Rotate the test foot five revolutions at a rotation speed of 40 6 rpm. Measure the relevant data at a rate of 40 Hz. Record the coefficient of friction value on the tester and repeat the test three times, replacing the artificial skin and filler. Contact with artificial skin during the test is prohibited and debris is removed using compressed air. Calculate and record the three average coefficients of friction.

The test piece was measured in the average friction coefficient using the artificial turf structure prepared in Comparative Examples 2, 4 and Examples and the results are shown in Table 2.

division
Requirement
Experimental conditions Experiment result
Temperature condition Comparative Example 4
0.35-0.75

23 ℃

Dry state
0.72 Comparative Example 2 0.88 Example 0.38

※ The higher the value, the higher the friction applied to the skin, which may cause burns and injuries.

As shown in Table 2, the artificial turf structure made of artificial turf yarn using PTT according to the present invention shows the smallest coefficient of friction, which is excellent in preventing burns and injuries.

3. Compression recovery test by static load

Experimental equipment

(1) Measuring rod: 60mm diameter, 8300g iron pole

(2) trivets supporting the pillars of iron

(3) GAUGE, CELL for thickness measurement

* Experimental method

(1) Take three test specimens for each sample and test it. The three averages are taken as the measured values of the sample. At this time, each specimen shall be taken from left, middle and right of sample.

(2) Put the cell on the sample and measure the initial height.

(3) Leave this specimen pressed for 24 hours with a metal column of 8300 g in weight and 60 mm in diameter. (Keep the standard standby)

(4) Measure the height of PILE at that time after 24 hours.

(5) Leave the measured specimen for another 5 minutes and measure the PILE height at that time.

* Calculation of the experimental results

(1) Compression Ratio: ｛(A-B) / A｝ * 100

(2) Recovery rate: ｛(C-B) / (A-B)｝ * 100

Experimental experiments using artificial turf yarn using PTT prepared in Comparative Examples 1, 2, 3 and Examples, and the results are shown in Table 3.

division A value (mm) B value (mm) C value (mm) Compression Ratio (%) % Recovery Comparative Example 1 10 0.85 7.7 91.50 74.86 Comparative Example 2 10 0.70 8.2 93.00 80.92 Comparative Example 3 10 0.77 8.7 92.30 85.92 Example 10 0.50 9.3 95.00 92.63

As shown in Table 3, it can be seen that the artificial turf yarn using PTT according to the present invention exhibits the highest compression recovery rate. Compression recovery rate is the most important physical properties of artificial turf artificial turf produced by the artificial turf of the present invention can be seen that has a very good recovery rate.

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

Figure 2 is a cross-sectional view of the spinneret for release cross-section according to a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view according to one embodiment of the artificial turf structure using artificial turf yarn using the PTT of the present invention.

DESCRIPTION OF THE RELATED ART [0002]

100: artificial grass yarn 102: the first projection

104: second projection 200: spinneret

202: first projection groove 204: second projection groove

300: artificial turf structure 302: artificial turf file

304: paper tissue 306: elastic pad layer

Claims (12)

In artificial turf yarn made of polytrimethyleneterephthalate (PTT), The cross section of the artificial turf yarn is flat and has a length L and a thickness S of a long axis, and at least two first protrusions having a radius R (2S> R≥S) protruding upward and downward are formed in the center. The artificial turf using PTT is characterized in that two or more second projections protruding up and down an arc having a radius r (R> r> S / 2) are symmetrically formed on both sides of the two or more first projections. Yarn. The method of claim 1, The PTT is made of terephthalic acid and 1,3-propanediol, The 1,3-propanediol artificial turf yarn using PTT, characterized in that extracted from natural materials. The method of claim 1, Density of the PTT is 1.3 ~ 1.4g / ㎠, Tg is 50 ~ 80 ℃ and Tm is artificial grass yarn using PTT, characterized in that 225 ~ 235 ℃. The method of claim 1, The artificial turf yarn is 100 ~ 800D / 1F, artificial turf yarn using PTT, characterized in that the crimp rate is 25 to 40%. The method of claim 1, The artificial turf yarn using a PTT, characterized in that the thickness of the artificial turf yarn is 50 ~ 400㎛. Artificial turf structure using the artificial turf yarn of any one of claims 1 to 5. The method of claim 6, The artificial turf structure is an artificial turf structure made of artificial turf yarns, artificial turf structure using a PTT, characterized in that consisting of the ground tissue is planted artificial turf file. The method of claim 7, wherein Artificial turf structure using a PTT characterized in that consisting of an elastic pad layer for adjusting the artificial turf pile at the bottom of the paper tissue. The method of claim 8, The elastic pad layer is formed of at least one selected from latex (latex), expanded polypropylene (EPP), styrene-butadiene rubber (SBR), polyvinyl chloride (PVC), and PU (polyurethane). Artificial turf structure. The method of claim 7, wherein The artificial turf structure using a PTT, characterized in that the length of the artificial turf pile is 5 ~ 70㎜. In the artificial turf spinneret made of polytrimethyleneterephthalate (PTT), The spinneret is flat and has a length L ₁ , a thickness D of a long axis, and has two or more first projection grooves in which a circular arc having a radius R ₁ (2D> R ₁ ≥D) protrudes up and down. And two or more second projection grooves having a radius R ₂ (R ₁ > R ₂ > D / 2) protruding upward and downward on both sides of the two or more first projection grooves. Artificial turf yarn spinneret using PTT. The method of claim 11, In the spinneret for the release section, the length of the interval between the first projection grooves is L ₂ from the center between the projection grooves, and the length of the interval between the first projection grooves and the second projection grooves is L ₃ from the center between the projection grooves. The length of the interval between the second projection groove is L ₄ from the center between the projection groove, artificial turf using spinneret using a PTT, characterized in that satisfying the following conditional formulas (1) to (4). (1) 4R ₁ > L ₂ > 2R ₁ (2) 2R ₁ > L ₃ > R ₁ + R ₂ (3) R ₁ + R ₂ > L ₄ > 2R ₂ (4) 20> L ₁ / D> 15

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