KR20080068271A - Rubber chip for artificial turf with environmental-friendly, method of preparing thereof, and structure for artificial turf field - Google Patents

Abstract

Environment-friendly anionic rubber chips for artificial turf are provided to prevent fine powder from flying away, to inhibit a human body from being stained with a pigment, and to generate sweet smell and anions. Anionic rubber chips(50) for artificial turf include 100 parts by weight of rubber chips(51), and a coating layer(52) which is applied onto the surface of the rubber chip and comprises 2.5-4.0 parts by weight of polyurethane resin, 0.5-1.5 parts by weight of anionic powder, and 0.2-1.0 parts by weight of pine oils. The rubber chips comprise at least one selected from the group comprising EPDM rubbers, tire rubbers, and mixtures thereof, and have a chip size of 2.5 mm or smaller.

Description

Rubber chip for environmentally friendly anion artificial turf filling, method for manufacturing the same, and laminated structure for artificial turf field including the same

1 is a cross-sectional view showing a rubber chip for negative ion artificial turf filling according to the present invention.

Figure 2 shows a cross-section of the artificial turf field including the anionic artificial turf filling rubber chip according to an embodiment of the present invention

The present invention relates to an environmentally friendly anionic artificial turf filling rubber chip, a method for manufacturing the same, and a laminated structure for artificial turf field containing the same, and more particularly, the fragrant fragrance comes out and releases anions that are beneficial to the human body. It relates to an environmentally friendly anionic artificial turf filling rubber chip, a manufacturing method thereof, and an artificial turf laminated structure including the same, which can be applied as a finishing material having a pleasant environment composition.

Artificial turf is always green and not restricted by environmental conditions, so it is very easy to manage after construction. The artificial turf field in which such artificial turf is constructed has a higher initial construction cost than general natural turf, but its surface is highly preferred for semi-permanent use, convenience of maintenance, and exercise.

However, the elastic material placed on the bottom of the artificial turf field has a problem that the dust caused by friction due to the concentration of the pressure is concentrated on the nature of the playground, and every time users step on the floor, the waste tire powder, etc. is blown to the body.

Most of the filling chips in artificial turf fields use black tire chips, EPDM (ethylene-propylene-diene monomer rubber) chips, and color coating chips. Most of them use black waste rubber chips. These chips for filling are different in the physical properties and quality of the rubber produced by the industry, and the situation is used after the crushing and collecting the rubber with different physical properties and quality. These rubbers are mostly unsuitable for filling chips because they use a lot of contaminant anti-aging agents and cause odors and discoloration of the grass.

Currently, there is no separate management standard for filling chips in artificial turf fields, so contaminated waste rubber chips are installed, and the color of artificial turf is discolored yellow. There are frequent cases of removing and rebuilding.

Referring to Korean Utility Registration No. 20-0413557, artificial turf for a triple football field is disclosed, and EPDM chips or SBR (styrene-butadiene-rubber) chips are used as rubber chips.

Domestic utility registration No. 20-0196049 proposes artificial turf for soccer field, but also uses rubber or polyurethane chips as rubber chips.

Domestic utility registration No. 20-0184138 refers to the artificial turf structure of artificial turf field using rubber chips attached with an adhesive. According to the use of the adhesive can prevent the gap between the gap between the artificial turf, but the use of artificial turf for a long time is also serious enough to not ignore the odor generated from the adhesive.

The artificial turf field, which is being constructed domestically and globally, has been continuously improving quality due to the fierce competition of artificial turf companies, and the quality level of artificial turf has increased significantly while the grass filling chip directly affects the human body. It is currently being installed without any management standards and product quality standards.

An object of the present invention for solving the above problems is to provide an environmentally friendly anion artificial turf filling rubber chip and a method for manufacturing the same, which does not fly fine powder and does not have pigments in the human body, generating aroma and anion.

In another aspect, the present invention provides an environmentally friendly artificial turf laminated structure for maintaining a pleasant environment including the anionic artificial turf filling rubber chip.

In order to achieve the above object, the present invention provides a rubber chip and an anionic artificial turf filling rubber chip coated on the surface of the rubber chip and the rubber chip, including a coating layer comprising a polyurethane resin, pigments, anion powder and sol oil. .

The anionic artificial turf filling rubber chip includes 2.5 to 4.0 parts by weight of polyurethane resin, 0.5 to 1.5 parts by weight of anion powder, and 0.2 to 1.0 parts by weight of sol oil based on 100 parts by weight of rubber chip.

The rubber chip uses one selected from the group consisting of EPDM rubber, tire rubber, and mixtures thereof, and uses a product in which particles are pulverized to a size of 1.0 to 2.0 mm.

The anion powder uses one selected from the group consisting of monazite, germanium, tourmaline, complex rare earth minerals, zeolites, elvan, and mixtures thereof.

The coating layer further comprises a toner pigment.

In another aspect, the present invention is to prepare a rubber chip by grinding the rubber

Adding a polyurethane resin, anionic powder, and sol oil to the rubber chip to mix and dry to form a coating layer

It provides a method for producing an anionic artificial turf filling rubber chip comprising a.

At this time, toner pigment is further added to the coating layer composition.

In another aspect, the present invention is the artificial turf layer, mixed aggregate layer, and artificial turf layer is sequentially stacked, the artificial turf layer is an artificial turf consisting of a silica sand layer, the layer comprising the above-mentioned anion artificial turf filling rubber chip and artificial turf Provide a laminated structure for the stadium.

Hereinafter, the present invention will be described in more detail.

Rubber chip for negative ion artificial turf filling according to the present invention can be applied to artificial turf field harmless to the human body and environmentally friendly using EPDM or tire rubber.

1 is a cross-sectional view showing a rubber chip for negative ion artificial turf filling according to the present invention.

Referring to Figure 1, the negative ion turf filling rubber chip 50 is a rubber chip 51; And a coating layer 52 coated on the surface of the rubber chip 51 and including a polyurethane resin, anionic powder, and sol oil.

The rubber chip 51 uses one selected from the group consisting of EPDM rubber, tire rubber, and mixtures thereof. The screen size of the bottom screen of the final sorter is Φ1.0 mm and the screen screen of the final mill is Φ2.0 mm. It is preferable to use only the products that come out.

If the size of the rubber chip 51 is processed in the screen net of less than the range can not completely remove the fine dust generated during the processing in the vibrating body and the sorter.

On the contrary, when the particle size is larger than the above range, the filling work is not performed well to the lower surface of the grass when the artificial turf is laid. If the particle size is large during the movement, rubber splashing, ballbound amount, etc. are not constant. Since the amount of natural loss is large, the particle size is best in the range of 1.0 to 2.0 mm.

Preferably, the EPDM rubber uses a product pulverized using only rubber having a single property used in EPDM rubber of automobile window strips and door diaphragim of a washing machine.

At this time, however, it is preferable not to use foamed rubber among EPDM rubbers. The foamed rubber is lost in the rainy season in summer, and there is a remarkable difference from the non-foamed rubber in ballbound amount and reaction coefficient during exercise, so it is not suitable as a chip for filling.

In addition, the vehicle tire is most preferably used as a product that is pulverized from Φ750 or more bus tires and truck tires. When manufacturing tires for buses and large trucks, the ratio of natural rubber (NR) is more than 60%, but passenger car tires generally contain 20% to 30% of natural rubber. It is very good at harmless to human body and is non-polluting rubber.

The coating layer 52 prevents the pigment such as black carbon from the black rubber when buried in the artificial turf to bury the human body.

The coating layer 52 includes 2.5 to 4.0 parts by weight of polyurethane resin, 0.5 to 1.5 parts by weight of anionic powder, and 0.2 to 1.0 parts by weight of sol oil, based on 100 parts by weight of the rubber chip.

The polyurethane resin coats the surface of the rubber chip 51 and prevents black carbon from being buried in the body when the sweat occurs during exercise. The polyurethane resin is used 2.5 to 4.0 parts by weight, preferably 2.7 to 3.6 parts by weight based on 100 parts by weight of the rubber chip. If the content of the resin is less than the above range is not enough to coat the rubber chip, the hardness of the coating layer or the adhesion to the rubber chip is lowered, on the contrary, if it exceeds the above range, the viscosity rises and workability becomes difficult.

At this time, a curing catalyst is used to promote curing of the polyurethane resin. The curing catalyst is known and used by appropriately adjusting the content thereof by those skilled in the art.

The anion powder is used to generate an anion beneficial for the human body, and semi-permanently emits 500 to 1400 pieces / cm3 of negative ions in artificial turf fields. The amount of release of these anions is very suitable considering the fact that the number of anions required for health is 400 to 1000 per cm 3 (Source: Air Secret, Se-hee Lee. Hongikjae). Furthermore, the number of anions released is about the same as the number of anions near waterfalls or when foresting.

Such anionic powder uses one selected from the group consisting of monazite, germanium, tourmaline, zeolite, complex rare earth minerals, elvan, and mixtures thereof.

The anionic powder is used 0.5 to 1.5 parts by weight, preferably 0.8 to 1.2 parts by weight based on 100 parts by weight of the rubber chip. If the content of the anion powder is less than the above range does not release a sufficient amount of anions, on the contrary, if exceeding the above range, workability such as aggregation occurs during the coating operation is reduced.

Brush oil in the present invention is used to block the distinctive odor of the rubber and to smell the fragrant pine needles. The sol oil is obtained by directly harvesting pine needles, or purchased commercially available.

The sol oil is used 0.2 to 1.0 parts by weight based on 100 parts by weight of rubber chips, preferably 0.4 to 0.8 parts by weight. If the content of the sol oil is less than the above range does not sufficiently eliminate the peculiar odor of rubber, on the contrary, even if it exceeds the above range, there is no significant increase in effect, so it is used in the above range.

In this case, a toner pigment is used in addition to the above composition. The toner pigment is to impart various colors to the anionic artificial turf filling rubber chip, and is not limited in the present invention and may be used as long as it is known, such as inorganic pigments and organic pigments.

The toner pigment is used in an amount of 0.5 to 1.5 parts by weight, preferably 0.8 to 1.3 parts by weight, based on 100 parts by weight of the rubber chip. If the content of the pigment is less than the above range, the color may not be sufficiently expressed. On the contrary, if the pigment exceeds the above range, workability may be deteriorated.

Such anionic artificial turf filling rubber chip 50 according to the present invention is not limited in size, but preferably has a size of 1.0 mm to 2.0 mm in order to give adequate elasticity and good drainage during exercise.

The rubber chip for anion artificial turf filling of this composition

a) crushing the rubber to prepare a rubber chip

b) mixing the rubber chip by adding a polyurethane resin, anionic powder and sol oil;

c) is prepared by drying to form a coating layer.

First, one rubber selected from the group consisting of EPDM rubber, tire rubber, and mixtures thereof is pulverized and pulverized to a size of 1.0 to 2.0 mm.

At this time, the pulverization is first crushed by a crusher, and then crushed several times, and finally passed through the screen net to produce a rubber chip pulverized to the size of the above range.

For example, rubber for weather strips for automobiles, rubber for door diaphragms for washing machines, bus tires, truck tires, and mixtures thereof are crushed to a size of 15 to 30 mm in a primary crusher. After crushing to the size of 8 to 10mm in the second mill, and then 5 to 6mm in the third mill, the size of 3 to 4mm in the fourth mill, fixed the screen net to Φ2.0mm in the fifth mill The lower screen net of the sorter is used as the main material only for products produced at Φ1.0mm.

Next, the rubber chip as the main material is placed in a stirrer, and the polyurethane resin, anionic powder and sol oil forming a coating layer are added thereto and mixed uniformly. At this time, toner pigment is further added to the above composition.

The stirrer may be a conventional stirrer, and after mixing the polyurethane resin, pigment, anion powder and sol oil in a separate mixer sufficiently, the rubber chip is injected into the stirrer and stirred.

Next, the uniformly mixed mixture is dried in a dryer to prepare a chip for filling artificial turf having a coating layer formed on the surface of the rubber chip.

At this time, the drying is carried out in a range in which the polyurethane causes a curing reaction and other coating layer-forming compositions including pigments can be sufficiently coated on the surface of the rubber chip, and should not exceed 3 to 5 minutes at a stirrer speed of 50 rpm. This is because if the coating time exceeds 5 minutes or more, the main material rubber chip deteriorates the coating function. In addition, the product from the stirrer is cured while passing through the drying line and the pigment should not come out when the chip is touched after completion of the curing.

In this case, the dryer may be a conventional dryer known in the art, and may be performed using, for example, a hot air vibrating body automatic drying line equipped with a hot air blower.

Specifically, the mixture obtained in the step is passed through a hot air blower at a temperature of 40 ° C. under the frame of the automatic drying line to perform drying. At this time, the upper surface of the part passing through the hot air fan is made of 6MC screen net and hot air comes up from the lower part, and the passage section is made of vibrating body to complete hardening through drying in a short time.

Such a filling chip for artificial turf is constructed in artificial turf field, and a large amount of negative ions are generated as well as a soft brush fragrance to maintain a pleasant environment.

Figure 2 is a cross-sectional view showing the application of the anionic artificial turf filling rubber chip according to an embodiment of the present invention. At this time, the construction of the artificial turf is not limited in the present invention, it is possible to use a method commonly used in this field, the configuration of each layer is also possible to change the deformation under a known composition.

Referring to FIG. 2, the artificial turf layered stacked structure is formed from the bottom of the dark shade layer 10, the mixed aggregate layer 20, and the artificial turf layer 30 from the bottom, and the artificial turf layer 30 is a silica sand layer. (31), an anionic artificial turf filling rubber chip layer 32, and artificial turf 33.

First of all, in order to construct artificial turf, the uneven phenomenon and the ground state of the road surface where the artificial turf is to be installed are checked, and then flattened with crushed stone aggregate.

This forms a blind rock layer 10 so that drainage is smoothly performed on the ground, and then, aggregates and crushed stone are disposed on the upper surface of the blind rock layer 10 to smooth the ground and drain the water smoothly.

Next, an artificial turf layer is formed on the mixed aggregate layer 20 to form a silica sand layer 30 on the artificial turf layer substructure.

The silica sand layer 31 serves to make the drainage well and to stand the grass vertically.

Next, a rubber chip layer for filling is formed on the upper surface of the silica sand layer. In general, when the length of the artificial turf is 55 mm, the silica sand layer has a height of 14 mm and a rubber chip layer has a height of 28 mm.

Such artificial turf ball laminated structure according to the present invention generates 500 to 1400 anions per 1 cm ³ to generate the same level of negative ions as waterfalls or arboretum, and the scent of the brush soaked out to maintain a comfortable environment. In addition, there is an advantage that the fine powder does not occur during exercise, the pigment does not come out at all when contacting the human body.

Hereinafter, preferred examples are provided to aid in understanding the present invention. However, the following examples are merely provided to more easily understand the present invention, and the contents of the present invention are not limited by the examples.

Example 1

As a main material, 1 kg of EPDM rubber having a particle size of 1.0 to 2.0 mm was injected into the stirrer. In a separate mixer, 30 g of polyurethane resin (product name: TP-1300), 12 g of anionic powder (product name: SN-4), 5 g of sol oil (product name: L-96112), and 2 g of a curing catalyst (product name: PU-500) are room temperature. Mixing was uniformly mixed for 5 minutes to prepare a coating composition.

The coating composition was injected into a stirrer with EPDM rubber, mixed for 5 minutes, and dried at 40 ° C. for 5 minutes using a hot air blower to prepare an anionic artificial grass filling rubber chip.

Example 2

Except for further adding 20 g of the toner (product name: YG-200) to the coating composition was prepared in the same manner as in Example 1 to prepare an anionic artificial turf filling rubber chip.

Comparative Example 1

Except that 25g of polyurethane resin and 20g of toner were added, the same procedure as in Example 1 was performed to prepare an anionic artificial turf filling rubber chip.

Comparative Example 2

Except that 45g of polyurethane resin and 20g of toner were added, the same procedure as in Example 1 was performed to prepare an anionic artificial turf filling rubber chip.

Comparative Example 3

Except that 5g of anion powder and 20g of toner were added, the same procedure as in Example 1 was performed to prepare an anionic artificial turf filling rubber chip.

<Comparative Example 4>

Except that 10g of anion powder and 20g of toner were added, the same procedure as in Example 1 was performed to prepare an anionic artificial turf filling rubber chip.

Experimental Example 1

In Examples 1 to 4, the workability, hardness, and adhesive force of the anionic artificial grass filling rubber chip were measured by a known method, and the results are shown in Table 1 below. At this time, 2 kg of anionic artificial turf filling rubber chip was added to 50L of water, and then heated and maintained at 70 ° C. for 4 hours.

The adhesion test was carried out to test whether the coated pigment was not deposited on the upper surface of the paper when the coated product was placed on white paper and rubbed the rubber chip with one heel so that it weighed 70kg.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Workability O O O X △ X Hardness O O X △ O O Adhesion O O X △ △ △ Pigment stains - none Occur Occur Occur Occur O: excellent △: normal X: deterioration

 Referring to Table 1, the anionic artificial turf filling rubber chip according to the present invention was excellent in workability as the content ratio of each composition is controlled. In addition, the surface hardness and adhesion was excellent, the pigment did not appear at all.

In comparison, the rubber chip for anionic artificial turf filling of Comparative Example 1 was good in workability, but the hardness and adhesion of the chip were not good due to the insufficient content of the polyurethane resin, resulting in a problem of pigments. In addition, the workability was very poor in Comparative Examples 2 and 4 using excessively polyurethane or anionic powder in terms of workability. In addition, the phenomenon that the pigment is buried in all of the rubber chip for negative ion turf filling of Comparative Examples 2 to 4.

<Examples 3 to 6>

Using the composition shown in Table 2 to prepare a rubber chip for anion artificial turf filling, the physical properties and anion generation value of the prepared anion artificial turf filling rubber chip was measured, and the results obtained are shown.

division Example 3 Example 4 Example 5 Example 6 designation Color Coating Scented Ion Chip ^{1 )} Aroma Anion Coating Chip ^{2 )} Scent Anion Coating Chip ^{3 )} Color Coating Scented Anion Chip ^{4 )} Main material Gray EPDM Chip Gray EPDM Chip (Grey + Black) EPDM Chip Tire chip    Furtherance Rubber chip 1000 g 1000 g 1000 g 1000 g Polyurethane resin 30 g 25 g 25 g 30 g Anion powder 12 g 12 g 12 g 12 g Toner Pigment 20 g - - 23 g Sol oil 5 g 5 g 5 g 5 g Curing catalyst 2 g 2 g 2 g 2 g    Properties Workability O O O O Hardness O O O O Adhesion O O O O Pigment stains none - - none Dust and Powder none none none none Negative ions generated (number per cm3) 1013 975 1205 1100 price Unit Price Comparison versus medium medium medium Note 1) Rubber chip of Example 3: Gray EPDM rubber of the door diaphragim of the washing machine, which has a specific gravity of 1.20 and uses highly elastic rubber. 2) Rubber chip of Example 4: Use the same product as the rubber of Example 3. 3) Rubber chip of Example 5: Mixing gray EPDM and black EPDM in a weight ratio of 50:50. 4) Rubber chip of Example 6: Rubber chip processed using only rubber recovered from large tires for buses and trucks with Φ 750 or more.

Referring to Table 2, the anionic artificial turf filling chips of Examples 3, 4, 5, and 6 all exhibited excellent characteristics.

Specifically, the anion artificial turf filling chip of Example 3 exhibited a green color using a green toner pigment, and has a high anion generation value. Anionic artificial turf filling chip of Example 4 used a gray rubber chip without using a toner pigment separately, which is inexpensive in terms of price. In addition, the negative ion turf filling chip of Example 5 has a large amount of negative consumption, and has a relatively inexpensive advantage in terms of price. In addition, a two-tone color is obtained by using gray and black rubber chips without separately using toner pigments as rubber chips. In addition, the anionic artificial turf filling chip of Example 6 was not only inexpensive using rubber chips recovered from waste tires, but also used green pigments as pigments, and also showed high anion generation.

As described above, the anionic artificial turf filling rubber chip according to the present invention has the following effects.

First, the anionic artificial turf filling rubber chip according to the present invention does not have pigments such as black carbon when the skin contacts the artificial turf, and there is no problem of air inhalation because there is no fine dust and harmful elements. .

Second, the anion artificial turf filling rubber chip according to the present invention is an anion beneficial to the human body is diverted to the Arboretum level, improve the body cells and autonomic nerve function of the human body is effective for health and development.

Third, the anionic artificial turf filling rubber chip according to the present invention has a soft fragrance to maintain a comfortable environment.

Fourth, the generation of negative ions in the anionic artificial grass filling rubber chip according to the present invention is semi-permanent, the same as the life of the coating layer and is characterized by excellent adhesion.

Claims (9)

Rubber chips and Coating on the surface of the rubber chip, the coating layer containing a polyurethane resin, anionic powder and sol oil Anionic artificial turf filling rubber chip comprising a. The method of claim 1, The anionic artificial turf filling rubber chip is an anionic artificial turf filling containing 2.5 to 4.0 parts by weight of polyurethane resin, 0.5 to 1.5 parts by weight of anion powder, and 0.2 to 1.0 parts by weight of sol oil based on 100 parts by weight of rubber chip. Rubber chip. The method of claim 1, The rubber chip is an anionic artificial turf filling rubber chip that is pulverized to a size of 2.5 mm or less, using one selected from the group consisting of EPDM rubber, tire rubber, and mixtures thereof. The method of claim 1, Wherein the anion powder is a monazite (Monazite), germanium, tourmaline, composite rare earth minerals, zeolite, ganban stone and the one is selected from the group consisting of a mixture of these, an anionic artificial turf filling rubber chip. The method of claim 1, The anionic artificial turf filling rubber chip is an anionic artificial turf filling rubber chip that releases 500 to 1400 anions per 1 cm ³ . The method of claim 1, In addition, the anionic artificial turf filling rubber chip is artificial turf filling rubber chip containing 0.5 to 1.5 parts by weight of toner pigment based on 100 parts by weight of the rubber chip. Grinding rubber to prepare rubber chips Adding a polyurethane resin, toner pigment, anionic powder and sol oil to the rubber chip and mixing the rubber chip; Drying to form a coating layer Method of manufacturing a rubber chip for anionic artificial turf filling of claim 1 comprising a. The method of claim 7, wherein The method of claim 1, wherein the coating layer is formed by adding 0.5 to 1.5 parts by weight of the toner pigment to 100 parts by weight of the rubber chip. A blind rock layer, mixed aggregate layer, and artificial turf layer are sequentially stacked, and the artificial turf layer is composed of a silica sand layer, an anionic artificial grass filling rubber chip layer, and artificial turf, Claims [1] The artificial turf stacked structure comprising the anionic artificial turf filling rubber chip layer comprising the anionic artificial turf filling rubber chip according to any one of claims 1 to 6.

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