KR20200117347A - Artificial turf and filler improved stain resistance, manufacturing method thereof, and artificial turf ground including the same - Google Patents

Abstract

The present invention relates to an artificial turf, an artificial turf filler, and manufacturing methods thereof and, more specifically, to an artificial turf and an artificial turf filler with improved pollutant resistance, and manufacturing methods thereof. To this end, the artificial turf comprises a coating layer.

Description

Artificial turf and filler improved stain resistance, manufacturing method thereof, and artificial turf ground including the same}

The present invention relates to an artificial turf liquor and an artificial turf filler and a method for manufacturing the same, and more particularly, to an artificial turf with improved contamination resistance and a method for manufacturing the same.

Recently, artificial turf grounds are being built in elementary schools, middle and high schools, and playgrounds of local governments to prevent safety accidents during use and to obtain a landscape effect. The artificial turf field consists of artificial turf liquor and an elastic material that is filled between the liquor.

Artificial turf liquors having various functions are being developed to have characteristics similar to natural turf.

In'Artificial turf liquor for heat shielding and its manufacturing method' issued to the applicant, the artificial turf liquor is manufactured by mixing and extruding a resin for manufacturing artificial turf liquor by mixing and extruding heat-shielding material and hydrophilic fiber, and discloses artificial turf liquor having heat shielding properties. do.

In Korean Patent No. 1387599 issued to the applicant,'Anti-static artificial turf liquor and its manufacturing method', an anti-static coating solution containing hydrophilic fibers, biodegradable fibers and a binder is passed through the resin for manufacturing artificial turf liquor while extruding into a linear film. Disclosed is a liquor for antistatic artificial turf having antistatic properties.

In Korean Patent No. 1674905 issued to the applicant,'self-value type artificial turf filler and its manufacturing method', coating chips for artificial turf filling are applied to the surface of recycled or new rubber chips, heat shielding agent 0.1-10 weight, antistatic agent 0.1-10 Disclosed is a self-healing artificial turf filler for heat shielding and antistatic, characterized in that a binder coating layer comprising 0.1 to 10% by weight of a self-healing capsule is formed.

These artificial turf liquor and fillers are contaminated by numerous pollutants, for example, various organic substances or fine dust, in the process of being exposed and used outdoors after being laid on the playground, despite their new function, and their lifespan is shortened.

The problem to be solved in the present invention is to provide a new artificial turf liquor having excellent contamination resistance.

Another problem to be solved in the present invention is to provide a new artificial turf filler having excellent contamination resistance.

Another problem to be solved in the present invention is to provide a new artificial turf field with excellent contamination resistance.

In order to solve the above problems, in the present invention

It provides artificial turf liquor, characterized in that a coating layer made of hydrophilic fibers and polyethylene glycol is formed on the surface of the artificial turf liquor in the form of a linear film made of polyethylene.

In the present invention, the polyethylene may be made of 70 to 90% by weight of low-density polyethylene and 10 to 30% by weight of high-density polystyrene so as to express extrusion characteristics and artificial turf properties. More preferably, the low-density polyethylene may include 70 to 90% by weight of low-density linear polyethylene and 10 to 30% by weight of low-density branched polyethylene.

In the present invention, the coating layer may be formed to a thickness of 1 to 500 micrometers, preferably 2 to 200 micrometers, more preferably 5 to 100 micrometers, and most preferably 10 to 50 micrometers. It can be formed in thickness.

In the present invention, the coating layer may be a polyurethane-based binder coating layer that can be adhered to the surface of polyethylene liquor to form a coating layer. In the practice of the present invention, the binder may be of either an aqueous type or an oil type, and it is preferable to use a one-component oil type polyurethane binder such as a moisture curing type having excellent adhesion to polyethylene artificial turf liquor. .

In the practice of the present invention, the polyurethane binder may constitute the remainder of the coating layer except for the hydrophilic fiber, polyethylene glycol, and carbon nanotubes, and preferably 30 to 98.8% by weight. If the content of the polyurethane binder is less than the above range, peeling of the coating layer may occur, and if the content of the polyurethane binder is more than the above range, the content of the hydrophilic fiber and polyethylene glycol decreases, so that stain resistance may not be expressed. have.

In the present invention, the hydrophilic fiber is a fiber having affinity with water, and the hydrophilicity is used for the affinity of polyethylene glycol. The hydrophilic fibers are rayon, cotton, pulp, and the like. In particular, rayon is very suitably used because of its high affinity with water, its long fibers, and its ease of molding into a predetermined shape as a liquid absorbing core, and excellent workability. Other hydrophilic fibers used in the present invention include water-absorbing synthetic fibers such as polyvinyl alcohol and sodium polyacrylate, and those obtained by impregnating and coating other synthetic fibers with polyvinyl alcohol or sodium polyacrylate. As a brand name, "Ransil" {manufactured by Saturday Spinning Co., Ltd.} can be mentioned.

In the practice of the present invention, the diameter of the hydrophilic fiber is preferably 20 to 50 micrometers, preferably 25 to 40 micrometers, and most preferably 20 micrometers. In addition, the length of the hydrophilic fiber is preferably 200 to 500 micrometers, and preferably has a length of about 5 to 10 times.

In a preferred embodiment of the present invention, the hydrophilic fiber may be used in an amount of 0.1 to 20% by weight based on the coating layer. When the content of the hydrophilic fiber is less than the above range, the compatibility with polyethylene glycol in the coating layer decreases, so that the dispersibility of polyethylene glycol decreases, and when the content of the hydrophilic fiber is excessive outside the above range, the coating layer and the coating layer are Physical properties of the formed artificial turf liquor, such as impact or tensile properties, may be deteriorated.

In the present invention, the polyethylene glycol is a material that is hydrophilic and does not have a charge, and is included in the coating layer together with the hydrophilic fiber to provide stain resistance.

In the present invention, the polyethylene glycol is a liquid polyethylene glycol at room temperature so that the polyethylene glycol contained in the coating layer can gradually move to the surface, preferably has a molecular weight of 1,000 or less, preferably 300 to 800.

In the present invention, the polyethylene glycol may be used in 1 to 40% by weight, preferably 2 to 30% by weight, even more preferably 5 to 10% by weight with respect to the coating layer. When the content of the polyethylene glycol is low, stain resistance is not sufficiently expressed, and when the content of polyethylene glycol is excessive, peeling of the coating layer may occur.

In the present invention, the carbon nanotubes are used to prevent contamination by reducing the contact area with contaminants by forming fine surface irregularities on the surface, preferably multi-walled, more preferably double-walled carbon nanotubes. have.

In the present invention, the carbon nanotubes may be tubes having a diameter of 10 to 50 nm, and may be purchased and used commercially.

In the present invention, the carbon nanotubes may contain 0.1 to 10% by weight, more preferably 1 to 5% by weight. When the content of the carbon nanotubes is large, there is no economical effect, and when the content of the carbon nanotubes is small, the stain resistance may not be sufficiently expressed.

In the present invention, the artificial turf resin may further include a pigment to control the color of alcohol. As the pigment, an organic or inorganic pigment capable of expressing green or the like may be used to form a color such as green. The pigment may preferably be used in an amount of 0.1 to 1 parts by weight, and even more preferably 0.2 to 0.5 parts by weight, based on 100 parts by weight of the coating solution.

The present invention in one aspect,

Extruding a polyethylene resin for manufacturing artificial turf liquor into a linear film form;

Forming a coating layer by passing the extruded resin through a coating solution containing hydrophilic fibers, polyethylene glycol, carbon nanotubes, and a binder

It provides a fouling-resistant artificial turf containing a.

In the practice of the present invention, the artificial turf liquor is molded into a desired length and width by heating and melting a resin in a molding apparatus. At this time, for the convenience of the subsequent process, the shape of the pile is preferably manufactured in a line shape, and the thickness may be 0.1 to 0.5 mm and a width of 1 to 5 mm, but it is not necessarily limited and can be freely changed to the shape to be manufactured. Do.

In a preferred embodiment of the present invention, the artificial turf liquor is prepared by being discharged from a molding apparatus and then drying after the coating liquid is coated on the surface while passing through a tank containing the coating liquid.

In the present invention, the coating solution may be diluted with the solvent and used, and the type of the solvent is different depending on the hydrophilicity of the binder, and a polar solvent such as water or ethanol may be used.

In one aspect, the present invention provides a fouling-resistant coating solution comprising a polyurethane binder, a hydrophilic fiber, polyethylene glycol, and carbon nanotubes.

In the present invention, the stain-resistant coating solution may be made of 30 to 98.8% by weight of a polyurethane binder, 0.1 to 20% by weight of hydrophilic fibers, 1 to 40% by weight of polyethylene glycol, and 0.1 to 10% by weight of carbon nanotubes.

In one aspect, the present invention comprises 30 to 98.8% by weight of a polyurethane binder, 0.1 to 20% by weight of hydrophilic fibers, 1 to 40% by weight of polyethylene glycol, and 0.1 to 10% by weight of carbon nanotubes on the surface of the rubber chip. It provides an artificial turf filler in which a fouling coating layer is formed.

In the present invention, the rubber chip may be a conventional elastic rubber chip, for example, a recycled or new rubber chip, and preferably, a rubber chip such as polyurethane or EPDM may be used. The rubber chips may be those disclosed in the prior documents of the present applicant described in the background art.

In one aspect, the artificial turf liquor is characterized in that a coating layer made of hydrophilic fibers and polyethylene glycol is formed on the surface of the artificial turf liquor in the form of a linear film made of polyethylene; And

It provides an artificial turf stadium comprising a filler filled between the artificial turf liquor.

According to the present invention, a new artificial turf liquor with strong contamination resistance has been provided. In addition, according to the present invention, a new method for producing artificial turf liquor having strong stain resistance has been provided.

In addition, when using the artificial turf liquor according to the present invention, it is possible to provide a new artificial turf field with strong contamination resistance together with a filler.

Hereinafter, the present invention will be described in detail through examples. The following examples are intended to illustrate the present invention, and in no case should be construed as limiting the scope of the invention. Various modifications and substitutions that can be conventionally implemented by those skilled in the art are possible in the above embodiment.

Example 1. Preparation of artificial turf liquor for preventing green contamination

500 g of a hydrophilic fiber component obtained by cutting a 10-micron diameter hydrophilic rayon fiber into a length of 150 micrometers, 500 g of PEG 400 (average molecular weight 380 to 420, liquid, 268 to 294 hydroxyl value), and 500 g of multi-walled carbon nanotubes (Korea nanomaterials; KRU4309), 8500 g of a polyurethane binder, and 100 g of a green pigment were mixed with 30 kg of a solvent in which ethanol and water were mixed in the same amount to prepare a coating solution, and put in a water bath and stirred.

Polyethylene, which is a raw material for ordinary artificial turf liquor, was introduced into a linear film forming apparatus and extruded into a linear film. The extruded linear film was prepared by passing through the coating liquid tank containing the coating liquid, coated with the coating liquid, cooled, and then subjected to a drawing machine for winding artificial turf liquor. A coating layer of 50 micrometers thick was formed on the film.

Example 2

1000 g of hydrophilic fiber components obtained by cutting 10 micron-diameter hydrophilic rayon fibers into 150 micrometer lengths, 1000 g of PEG 400 (average molecular weight 380 to 420, liquid, 268 to 294 hydroxyl value), and 500 g of multi-walled carbon nanotubes (Korea nanomaterials; KRU4309), 7500 g of a polyurethane binder, and 100 g of a green pigment were mixed with 30 kg of a solvent in which ethanol and water were mixed in the same amount to prepare a coating solution, and put in a water bath and stirred.

Polyethylene, which is a raw material for ordinary artificial turf liquor, was introduced into a linear film forming apparatus and extruded into a linear film. The extruded linear film was prepared by passing through the coating liquid tank containing the coating liquid, coated with the coating liquid, cooled, and then subjected to a drawing machine for winding artificial turf liquor. A coating layer of 50 micrometers thick was formed on the film.

Example 3

500 g of hydrophilic fiber components obtained by cutting a 15 micron diameter hydrophilic rayon fiber into a length of 100 micrometers, 1000 g of PEG 400 (average molecular weight 380 to 420, liquid, 268 to 294 hydroxyl value), and 500 g of multi-walled carbon nanotubes (Korea nanomaterials; KRU4309), 8000 g of a polyurethane binder, and 100 g of a green pigment were mixed with 30 kg of a solvent in which ethanol and water were mixed in the same amount to prepare a coating solution, and put in a water bath and stirred.

Polyethylene, which is a raw material for ordinary artificial turf liquor, was introduced into a linear film forming apparatus and extruded into a linear film. The extruded linear film was prepared by passing through the coating liquid tank containing the coating liquid, coated with the coating liquid, cooled, and then subjected to a drawing machine for winding artificial turf liquor. A coating layer of 50 micrometers thick was formed on the film.

Comparative Example 1

A coating solution was prepared by mixing 500 g of a hydrophilic fiber component obtained by cutting a 10-micron diameter hydrophilic rayon fiber into a length of 150 micrometers, 9500 g of a polyurethane binder, and 100 g of a green pigment with 30 kg of a solvent in which ethanol and water are mixed in the same amount. Placed in a water bath and stirred.

Polyethylene, which is a raw material for ordinary artificial turf liquor, was introduced into a linear film forming apparatus and extruded into a linear film. The extruded linear film was prepared by passing through the coating solution tank containing the coating solution, coated with the coating solution, cooled, and then subjected to a drawing machine for winding artificial turf liquor. A coating layer of 50 micrometers thick was formed on the film.

Comparative Example 2

A coating solution was prepared by mixing 500 g of PEG 400 (average molecular weight 380 ~ 420, liquid, hydroxyl value 268 ~ 294), 9500 g of a polyurethane binder, and 100 g of a green pigment with 30 kg of a solvent in which ethanol and water are mixed in the same amount. Placed in a water bath and stirred.

Polyethylene, which is a raw material for ordinary artificial turf liquor, was introduced into a linear film forming apparatus and extruded into a linear film. The extruded linear film was prepared by passing through the coating liquid tank containing the coating liquid, coated with the coating liquid, cooled, and then subjected to a drawing machine for winding artificial turf liquor. A coating layer of 50 micrometers thick was formed on the film.

Tensile and elongation were measured by physical properties of the artificial turf liquor prepared in Examples 1 to 3 and Comparative Examples 1 to 2.

Comparative Example 3

500g of hydrophilic fiber component cut into 150 micrometers of hydrophilic rayon fiber of 10 micron diameter and 500 g of PEG 1000 (average molecular weight 900 ~ 1050, solid, hydroxyl value 108 ~ 117, melting point 35 ~ 40), polyurethane binder 9000 g and 100 g of a green pigment were mixed with 30 kg of a solvent in which ethanol and water were mixed in the same amount to prepare a coating solution, and stirred in a water bath maintained at 45°C.

Polyethylene, which is a raw material for ordinary artificial turf liquor, was introduced into a linear film forming apparatus and extruded into a linear film. The extruded linear film was prepared by passing through the coating liquid tank containing the coating liquid, coated with the coating liquid, cooled, and then subjected to a drawing machine for winding artificial turf liquor. A coating layer of 50 micrometers thick was formed on the film.

Item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Tensile strength (MPa) 23 22 22 23 23 24 Elongation(%) 180 200 200 190 180 170

The stain resistance of Examples 1 to 3 and Comparative Examples 1 to 2 was measured.

Item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Fouling resistance 1.2 1.1 1.3 5.8 6.4 6.2

Staining resistance: According to the contamination test method of KSM 3802, a 10% aqueous ammonia solution was used as a contaminant and the brightness index (ΔL) according to KSM 5000-3031 was measured using a Minolta CR-400 color difference meter.

Example 4.

500 g of a hydrophilic fiber component obtained by cutting a 10 micron diameter hydrophilic rayon fiber to a length of 150 micrometers, 500 g of PEG 400 (average molecular weight 380 to 420, liquid, 268 to 294 hydroxyl value), and 500 g of multi-walled carbon nanotubes (Korea nanomaterials; KRU4309), 8500 g of a polyurethane binder, and 100 g of a green pigment were mixed with 30 kg of a solvent in which ethanol and water were mixed in the same amount to prepare a coating solution, and put in a water bath and stirred.

Polyurethane rubber chips having a diameter of 2 to 5 mm were put into the reactor, and a coating solution was sprayed on the surface while stirring to prepare a fouling-resistant artificial turf filler.

Comparative Example 4

A coating solution was prepared by mixing 10000 g of a polyurethane binder and 100 g of a green pigment with 30 kg of a solvent in which ethanol and water were mixed in the same amount, and stirred in a water bath. Polyurethane rubber chips having a diameter of 2 to 5 mm were put into the reactor, and a coating solution was sprayed on the surface while stirring to prepare a fouling-resistant artificial turf filler.

Pollution resistance measurement

Item Example 4 Comparative Example 4 Pollution resistance (lightness difference) 35 55

According to the contamination test method of KSM 3802, a 10% aqueous ammonia solution was used as a contaminant and a Minolta CR-400 color difference meter was used to measure the brightness index difference (ΔL) according to KSM 5000-3031.

Claims (18)

Artificial turf liquor, characterized in that a coating layer made of hydrophilic fibers, polyethylene glycol and carbon nanotubes is formed on the surface of the artificial turf liquor in the form of a linear film made of polyethylene. The method of claim 1,
The polyethylene is artificial turf liquor, characterized in that consisting of 70 to 90% by weight of low-density polyethylene and 10 to 30% by weight of high-density polyethylene. The method according to claim 1 or 2,
Artificial turf liquor, characterized in that the coating layer is formed to a thickness of 1 to 500 micrometers. The method according to claim 1 or 2,
The coating layer is artificial turf liquor, characterized in that it is a coating layer comprising a polyurethane-based binder adhered to the surface of the polyethylene liquor. The method according to claim 1 or 2,
Artificial turf liquor, characterized in that the hydrophilic fiber is rayon. The method according to claim 1 or 2,
Artificial turf liquor, characterized in that it is a liquid polyethylene glycol at room temperature. The method of claim 6,
Artificial turf liquor, characterized in that the molecular weight of the polyethylene glycol has a molecular weight of 300 to 800. The method according to claim 1 or 2,
The carbon nanotubes are artificial turf, characterized in that the multi-walled carbon nanotubes. The method of claim 1 or 2, wherein the coating layer is made of 1 to 40% by weight of polyethylene glycol, 0.1 to 20% by weight of hydrophilic fibers, 0.1 to 10% by weight of carbon nanotubes, and 30 to 98.8% by weight of a binder. Artificial turf. Extruding a polyethylene resin for manufacturing artificial turf liquor into a linear film form; And
Forming a coating layer on the surface of the film by passing the extruded resin through a coating solution containing hydrophilic fibers, polyethylene glycol, carbon nanotubes, and a polyurethane binder; fouling-resistant artificial turf production method comprising a. The artificial turf liquor according to claim 9, wherein the artificial turf liquor has a thickness of 0.1 to 0.5 mm and a width of 1 to 5 mm. Artificial turf filler, characterized in that a fouling-resistant coating layer made of hydrophilic fibers, polyethylene glycol, carbon nanotubes, and polyurethane binder is formed on the surface of the rubber chip. The method of claim 12,
The rubber chip is an artificial turf filler, characterized in that the new or recycled rubber chip. The method of claim 12,
The rubber chip is an artificial turf filler, characterized in that the polyurethane rubber chip of 2 ~ 5 mm diameter. The method of claim 12,
The coating layer is artificial grass filler, characterized in that consisting of polyethylene glycol 1 to 40% by weight, hydrophilic fibers 0.1 to 20% by weight, carbon nanotubes 0.1 to 10% by weight, and 30 to 98.8% by weight of binder. Artificial turf liquor in which a fouling-resistant coating layer made of a hydrophilic fiber, polyethylene glycol, carbon nanotubes, and a polyurethane binder is formed on the surface of the artificial turf liquor in the form of a linear film made of polyethylene; And
An artificial turf field comprising an artificial turf filler on the surface of the artificial turf liquor in the form of a linear film made of polyethylene with a fouling-resistant coating layer composed of a hydrophilic fiber, polyethylene glycol, carbon nanotubes, and a polyurethane binder. The method of claim 16,
The coating layer is an artificial turf field, characterized in that consisting of 1 to 40% by weight of polyethylene glycol, 0.1 to 20% by weight of hydrophilic fibers, 0.1 to 10% by weight of carbon nanotubes, and 30 to 98.8% by weight of a binder. Polyethylene glycol 1 to 40% by weight, hydrophilic fiber 0.1 to 20% by weight, carbon nanotubes 0.1 to 10% by weight, a fouling-resistant coating composition consisting of 30 to 98.8% by weight of a binder.