KR20140101107A

KR20140101107A - Environmental-Friendly Elastic Chips Comprising Loess

Info

Publication number: KR20140101107A
Application number: KR1020130014279A
Authority: KR
Inventors: 김성노
Original assignee: 에코텍 주식회사
Priority date: 2013-02-08
Filing date: 2013-02-08
Publication date: 2014-08-19

Abstract

TECHNICAL FIELD The present invention relates to a coating chip for artificial turf filling and a method of manufacturing the same, and more particularly, to a rubber coating chip for eco-friendly artificial turf filling and a manufacturing method thereof.
The method for producing a rubber coating material for artificial turf filling according to the present invention is characterized in that on the surface of a reclaimed or new rubber chip, 3-8 parts by weight of yellow loam, 3-10 parts by weight of a binder mixture and 0.1-1 parts by weight A silane compound and 0.1 to 1 part by weight of a pigment.
The rubber coating material for artificial turf filling according to the present invention can be used for a long time because the flexible and rigid coating layer is not peeled off during shrinkage and expansion process due to impact applied during use and shrinking and expansion process according to temperature change. A new artificial turf filler with release effect has been provided.
In addition, the present invention suggests a method for introducing raw ocher into a rubber chip, which is not suitable as a filling material for artificial turf, which is easy to manufacture and low in cost but weak in particle size, and can be used in an eco-friendly artificial turf.

Description

TECHNICAL FIELD [0001] The present invention relates to a coating chip for environmentally friendly synthetic grass,

TECHNICAL FIELD The present invention relates to a coating chip for artificial turf filling and a method of manufacturing the same, and more particularly, to a rubber coating chip for eco-friendly artificial turf filling and a manufacturing method thereof.

Recently, in order to prevent safety accidents during use and to obtain landscaping effects, artificial turf fields are being constructed at elementary schools, junior high schools, and high schools and local governments. Artificial turf is composed of grass grass with the shape of grass and filling material to provide elasticity, and various elastic chips are used as the filling material. Initially, waste materials such as waste tires and industrial waste rubber were used, but the waste materials contained in the waste materials are sharply reduced due to concerns about health or environmental problems. Instead, a filler using a new material rubber chip such as urethane rubber has been developed and used.

Korean Patent No. 780229 issued to Taeheung et al. Discloses a novel thermoplastic elastomer resin composition comprising a styrenic block copolymer, an olefin polymer, a process oil, a resin stabilizer and a pigment as thermoplastic elastomer chips for artificial turf.

In Korean Patent No. 995211 granted to Matsuyuki, a thermoplastic elastomeric chip for artificial turf is used as a thermoplastic elastomer and a cork powder, a synthetic resin, a graft copolymerized elastomer, a folw paraffin, Or a mineral oil, and an inorganic material.

Korean Patent No. 1122268 issued to Cassiopeo Co., Ltd. discloses a polylactide aluminum softening agent for mixing natural rubber with additives, a polychlorinated aluminum flocculant for constituting small particles, a gluing agent for fusing natural rubber with natural loess powder, Stearic acid for accelerating taraldehyde crosslinking agent and crosslinking agent is added to the crosslinking accelerator and the crosslinking accelerator for carbon black and phenylbetanaphthylamine which is not aged in the sun to the sunlight crack antioxidant, And the mixture is stirred and kneaded with a high-temperature molding machine, and the mixture is cut with a cutting machine to produce a filler for artificial turf.

Instead of using these new materials, methods for treating waste products and using them as fillers for artificial turf are being developed.

Patent No. 869585 granted to Greenchem Co., Ltd. is a chip for filling artificial turf plant material, which comprises 30 to 90% by weight of a polyurethane rubber chip chip having a particle size of 0.5 to 1.0 mm selected from waste materials, 10 to 70% by weight of loess powder having a particle size of 1.0 mm are mixed, a polyurethane resin solution is added thereto and mixed again to obtain a filling chip having a size of 0.8 mm to 2.0 mm. However, this method has a problem in that the compatibility between the inorganic yellow loess powder and the waste organic urethane chip is poor, and even if they are adhered with a polyurethane resin solution, they are easily broken down and become undifferentiated. In addition, there is a problem that it is difficult to express a color suitable for a grass field due to excessive use of loess.

On the other hand, Japanese Patent No. 869562 discloses a rubber chip treated with a vinegar solution and a biochip containing the rubber chip and the loess. In this method, the rubber chips must be treated with the vinegar for 24 hours or more, and the manufacturing process is complicated. Also, in the case of green loess, the green chip is susceptible to impact, heat or water, and the amount of loess used in 100 parts by weight of biochip exceeds 0.02 parts by weight There is a problem that the elasticity is deteriorated due to overcoating with yellow clay.

Accordingly, there is a continuing need for a method for providing a material suitable for use in artificial turf filling, using a recycled rubber chip, being environmentally friendly, and easily implementing colors suitable for artificial turf pitches.

A problem to be solved by the present invention is to provide a new artificial turf filler material manufacturing method which can improve the chip strength by increasing the compatibility of the waste yellow rubber which is an organic material and the waste rubber chip which is an organic material while using environmentally friendly loess, .

Another object to be solved by the present invention is to provide a new artificial turf filler material which can improve the chip strength by increasing the compatibility of the waste yellow rubber that is an organic material and the waste rubber chip which is an organic material while using environmentally friendly loess, .

In order to solve the above-mentioned problems, in the present invention, 3-8 parts by weight of loess, 3-10 parts by weight of a binder mixture and 0.1-1 parts by weight of a silane compound And 0.1 to 1 part by weight of a pigment are formed on the surface of the synthetic resin.

In one aspect of the present invention, there is provided a method for manufacturing a reclaimed or novel rubber chip, comprising applying to the surface of a reclaimed or new rubber chip 3 to 8 parts by weight of loess, 3-10 parts by weight of a binder mixture and 0.1 to 1 part by weight of a silane compound, And a coating layer made of a pigment is formed on the surface of the artificial turf filler.

According to another aspect of the present invention, there is provided a rubber composition comprising, on a surface of a reclaimed or novel rubber chip, 3-8 parts by weight of loess, 3-10 parts by weight of a binder mixture and 0.1-1 parts by weight of a silane compound and 0.1-1 And a coating layer composed of a pigment in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total weight of the synthetic grass filler.

In the present invention, the rubber chip may be a reclaimed rubber chip obtained by pulverizing a waste rubber, a petroleum resin or the like, or a new material elastic rubber chip such as polyurethane or EPDM. Since the physical properties of the waste tires are constant, they can be used in a uniform size regardless of the type. In the case of waste polyurethane, shredded polyurethane chips can be used in shoes, refrigerators, sheets and the like It is preferable that the various urethane used are selected by crushing and scrapped. In the case of new rubber chips, EPDM, polyurethane, etc. can be used and they can be purchased commercially.

In the practice of the present invention, it is preferable that the rubber chip is used without any additional surface treatment so as not to affect the elasticity of the rubber, such as the reclaimed rubber or the rubber. When the surface of the rubber is treated with antimicrobial treatment or chemicals such as wood vinegar, the elasticity is lowered and it is difficult to form a sufficient amount of the soil layer on the surface.

In the present invention, it is preferable that the rubber chip size is a synthetic grass filler having a diameter of about 1-10 mm, preferably about 2-5 mm, in consideration of strength, elasticity and tensile properties.

In the present invention, it is preferable to use green loess, which can be purchased without any treatment, and the green loess is collectively referred to as deposited soil or weathered residual soil. The green loess is a chemical raw material and is 60 to 65 wt% 10 to 13 parts by weight of alumina, 5 to 6 parts by weight of iron powder, 8 parts by weight of inner and outer lime, about 2 parts by weight of magnesium and sodium and 1.5 parts by weight of carly, And the carbonate mineral includes 2 to 5 parts by weight of siltite, and the biotite, apatite, biotite, chlorite, perlite, epiminite, garnet, and pyroxene , Rutile, sillimanite, cryptomeria, tourmaline and zircon.

The green loess soil can be used by separating and drying the yellow loess that has settled in the course of washing the loess soil in the loess soil for about 1 to 2 days. The grain size of the loess is about 10-60 micrometers. When the green loess particles become large, the chips are not uniformly dispersed in the binder and the strength of the chips is deteriorated. When the particles are too fine, the manufacturing cost is increased and the marketability is deteriorated. In addition to its low cost and easy production, it can be easily dispersed in a binder when mixed with a binder to cover the appearance of black recycled rubber particles, and is soft and has good ductility And the coating layer containing the loess is prevented from deteriorating in ductility. The green loess in the range of 10-60 micrometers, preferably 20-50 micrometers, is 3-8 parts by weight, more preferably 4-7 parts by weight, and most preferably 5-6 parts by weight, Parts by weight. When the amount of the green loess is small, it is difficult to expect an effect of releasing anion or far-infrared rays, and when a dark rubber chip such as a waste rubber is coated, the rubber surface is not sufficiently covered, May occur. In addition, when the amount of raw loess is excessively large, not only the elasticity of the rubber decreases, but also the loess coating layer, which is relatively inelastic in the process of crushing or restoring the rubber when the impact is applied, is broken and peeled.

In the present invention, the pigment may be an organic or inorganic pigment capable of developing green color so as to form a color coated chip such as green. The pigment may be used in an amount of preferably 0.1 to 1 part by weight, more preferably 0.2 to 0.5 part by weight based on 100 parts by weight of the rubber chip.

In the present invention, the binder is mixed with the green clay and then cured in the coating process to form a coating layer. The binder may be a polyurethane binder, an acrylic binder, or a mixture thereof. The binder is preferably used in an amount of 3-10 parts by weight, more preferably 4-8 parts by weight, and most preferably 5-6 parts by weight with respect to 100 parts by weight of the rubber chip. When the content of the binder is less than 3 parts by weight, the content of the binder becomes smaller than that of the raw yellow soil, so that the dispersibility of the raw yellow soil in the binder deteriorates and peeling of the raw yellow soil may occur after the coating. When the content of the binder is more than 10 parts by weight, the rubber chips are adhered to each other during the coating process, resulting in a problem that the chips are agglomerated during the manufacturing process.

In the present invention, it is also possible to use a compatibilizer to improve the dispersibility of raw yellow soil and the compatibility with rubber to increase the elasticity and tensile strength as a whole and to prevent deterioration of the physical properties of the chip due to the content of raw yellow soil , It is preferable to use a silane compound capable of exhibiting properties similar to silica so as to enhance compatibility between a large amount of silica contained in the loess and rubber. As the silane compound, compounds such as vinyl silane and mercaptosilane may be used, and they may be commercially purchased and used. For example, the silane compound may be selected from the group consisting of methyltrimethoxysilane (MTMS), 3-glycidoxypropyl trimethoxysilane (GPTMS), 3-methacryloxypropyltrimethoxysilane -methacryloxypropyl trimethoxysilane (MPTMS), and aminopropyl triethoxysilane. The silane compound may be used in an amount of 0.1-1 parts by weight, preferably 0.2-0.5 parts by weight, based on 100 parts by weight of the rubber chip. When the content of the silane compound is too small, it is difficult to be used as a compatibilizing agent between the raw yellow soil and the rubber, and when the content of the silane compound is too large, the coating layer becomes excessively cured and the elasticity may be deteriorated.

In the present invention, the coating layer containing the loess is preferably formed to a thickness of 50-500 micrometers, preferably 100-300 micrometers, so as to withstand shrinkage and expansion of the rubber chip. When the thickness of the coating layer is excessively large, the content of the loess is increased and the elasticity may be broken and the fragrance may be broken. When it is too thin, it is difficult to exhibit the environmentally friendly characteristics of the clayey soils. It becomes difficult.

The artificial turf filler according to the present invention is installed as a filling material of an artificial turf ground to provide a natural grass turf.

The artificial turf filler according to the present invention can be used for a long period of time because the flexible and rigid coating layer is not peeled off during shrinkage and expansion due to impact applied during use and expansion and shrinkage due to temperature change, and anion and far- A new artificial turf filler was provided.

In addition, the present invention suggests a method for introducing raw ocher into a rubber chip, which is not suitable as a filling material for artificial turf, which is easy to manufacture and low in cost but weak in particle size, and can be used in an eco-friendly artificial turf.

Hereinafter, the present invention will be described in detail with reference to examples. The following examples are intended to illustrate the invention and are not to be construed as limiting the scope of the invention in any way. Various modifications and substitutions that can be ordinarily practiced by those skilled in the art are possible in the above-described embodiments.

Example 1

Manufacture of green artificial turf filler chip

Yellow clay formed by spraying water on a pile of yellow clay was collected and allowed to stand in a separate container for 24 hours. The mixture was allowed to stand still in a vessel and then dried to obtain green loess. The raw loess had a particle size of 20-30 micrometers. The green loess so produced and the polyurethane binder were mixed at the same weight ratio and stirred to prepare a separate coating solution.

100 kg of waste urethane chips having a particle diameter of about 2-3 mm were charged into a cylindrical reactor, and the temperature of the reactor was raised to 60 캜 while stirring. 300 g of a silane compound (aminopropyltriethoxysilane) and 500 g of a green pigment were mixed with 10 kg of the coating liquid prepared above, and the mixture was gradually dropped over 2 hours, heated to 80 캜 and stirred for 5 hours. Thereafter, the temperature was gradually lowered, and the temperature was maintained for 8 hours with stirring to produce a synthetic grass filler chip having a green appearance.

Example 2

The procedure of Example 1 was repeated except that EPDM chip having a diameter of 2 to 4 mm was used.

Example 3

The procedure of Example 1 was repeated except that 6 kg of the coating liquid (3 kg of green ocher and 3 kg of polyurethane) was used.

Example 4

The procedure of Example 1 was repeated except that 16 kg of the coating liquid (8 kg of raw yellow soil and 8 kg of polyurethane) was used.

COMPARATIVE EXAMPLE 1 (comparison with over-exposure of raw yellow clay)

The procedure of Example 1 was repeated except that 20 kg of the coating liquid (10 kg of green loam and 10 kg of polyurethane) was used.

Comparative Example 2 (comparison with no silane compound added)

The procedure of Example 1 was repeated except that the silane compound was not used.

Property measurement

100 parts by weight of the green artificial turf filler prepared in Examples 1 to 5 and Comparative Examples 1 and 2 and 30 kg of this liquid type polyurethane binder were mixed and placed at a thickness of 5 cm and pressed at a temperature of about 100 ° C to measure physical properties And the results are shown in Table 1. < tb > < TABLE > Compatibility was measured by visually observing the state of the chip surface during a 50% compression-restoration cycle of the chip.

Item Practice 1 Practice 2 Practice 3 Practice 4 Comparison 1 Comparison 2 Tensile Strength (Mpa) 0.90 0.81 0.75 0.76 0.65 0.77 Elongation (%) 79 78 92 93 65 80 Tensile Stress (MPa) 0.64 0.59 0.69 0.66 0.50 0.55 Hardness (HS) 57 53 59 53 45 53 Compatibility Good Good Good Good Crumbling Crumbling color green green green green green green

Good: The chip surface is not broken or peeled off during a 50% compression-restoration 100 cycle.

Color: Visually observe the appearance of the chip surface.

Claims

A coating layer composed of 3-8 parts by weight of yellow loess and 3-10 parts by weight of a binder mixture and 0.1-1 parts by weight of silane compound and 0.1-1 parts by weight of pigment is formed on the surface of the reclaimed or new rubber chip, Wherein the method comprises the steps of:

The positive resist composition according to claim 1, wherein the silane compound is at least one selected from methyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, and aminopropyltriethoxysilane Wherein the method comprises the steps of:

The method of claim 1, wherein the loess is a green loam having a diameter of 10 to 60 micrometers.

A synthetic turf filler produced by the process according to any one of claims 1 to 3.

A coating layer composed of 3-8 parts by weight of yellow loess and 3-10 parts by weight of a binder mixture and 0.1-1 parts by weight of silane compound and 0.1-1 parts by weight of pigment is formed on the surface of the reclaimed or new rubber chip, Wherein the artificial turf filler is a synthetic turf filler.