KR102296508B1 - Artificial turf structure with antibacterial properties - Google Patents

Abstract

The present invention relates to an artificial turf structure having antibacterial properties. It is made, one side is located on the upper side of the foam layer, the other side is located on the lower surface of the antibacterial layer, and a backing layer in contact with the lower surface of the antibacterial layer and the other side of the pile part and formed of a nonwoven fabric, the antibacterial layer It is characterized in that it includes an antibacterial fiber yarn that penetrates through the foam layer and protrudes to the upper surface of the foam layer.

Description

Artificial turf structure with antibacterial properties

The present invention relates to an artificial turf structure having antibacterial properties.

Recently, artificial turf has been used for sports such as baseball fields, tennis courts, rugby fields, soccer fields, gate ball fields, golf practice mats, poolside mats, open places such as parks, hospitals, schools, kindergartens, home gardens, terraces, and verandas. It has been widely used until

Artificial turf is one of the specially used landscaping materials. Since it was first manufactured in the United States, it has been mainly used in sports fields, and can be used in places such as indoor gardens where turf growth is not possible or outdoor areas facing the north side of high-rise buildings where sunlight is extremely limited.

Such artificial turf is always green and is not restricted by environmental conditions, so it is easy to manage after construction. Artificial turf stadiums with artificial turf have higher initial construction costs compared to general natural turf, but they are highly preferred because of their semi-permanent use, ease of maintenance, and an even surface suitable for exercise. In the case of artificial turf for sports, artificial turf was used as a means to absorb the player's shock and secure a series of appropriate performance, such as ball rolling properties, ball throwing properties, and ball speed change after the ball bounces off the ground. .

This artificial turf has been developed through several stages along with the needs of customers and the development of material technology. In particular, in the case of artificial turf for soccer fields, since 1990, the FIFA standard, a quality certification system for artificial turf called 'FIFA Quality Concept', was introduced, and the demand for standardized game performance increased. are being tried

On the other hand, artificial turf is mostly exposed to the external environment and the deterioration of its pulling power has been a problem due to prolonged exposure to climatic conditions such as rain, snow, high temperature, and low temperature. There are limits to the reduction. In addition, on artificial turf, the skin of children as well as adults is constantly in contact with the skin, and various food and beverages introduced from the outside while using it by an unspecified number of people create an environment where microorganisms such as mold can grow. As the number of dedicated artificial turf playgrounds increases, the need for such antibacterial properties is being demanded, and various studies are being conducted to improve the antibacterial properties of artificial turf.

(Prior Document 1) Republic of Korea Patent No. 10-1589407 (2016.01.21. Announcement)

The problem to be solved by the present invention is to provide an artificial turf structure that can prevent the propagation of mold or microorganisms due to the problem of being exposed to the outside for a long time and can maintain cleanliness for a long time.

According to an embodiment of the present invention, the artificial turf structure having antibacterial properties includes a foam layer, an antibacterial layer formed of a nonwoven fabric including an antibacterial material located on the lower surface of the foam layer, and napped through the foam layer and the antibacterial layer. It consists of a plurality of pile yarns, one side is located on the upper side of the foam layer, the other side is located on the lower surface of the antibacterial layer, and a backing layer formed of a nonwoven fabric and in contact with the lower surface of the antibacterial layer and the other side of the pile part, , The antibacterial layer provides an artificial turf structure having antibacterial properties including antibacterial fibers protruding through the foam layer to the upper surface of the foam layer.

The antimicrobial material may be modified copper sulfide (CuS) fine particles.

The modified copper sulfide fine particles may have an average diameter of 0.5 to 10 μm.

The antibacterial material may include 0.1 to 1% by weight based on 100% by weight of the entire artificial turf structure.

The modified copper sulfide fine particles are prepared by preparing a copper compound, wet milling the copper compound to prepare copper compound fine particles, drying the copper compound fine particles at 90 to 150° C., the dried copper compound fine particles may be prepared by dry milling under nitrogen condition, and classifying the dry milled copper compound fine particles.

The copper compound may be cuprous sulfide or cuprous sulfide.

The wet milling is performed by mixing the copper compound with water and then rubbing it with the zircotia beads, and the dry milling may be performed in an air jet device equipped with a spray drying device.

The antimicrobial layer includes a first fiber and a second fiber in a weight ratio of 10-50:50-90, the melting point of the first fiber is 120-150°C, and the melting point of the second fiber is 200-260°C. can

The nonwoven fabric constituting the antibacterial layer and the backing layer may be made of polypropylene or polyester fiber.

The thickness of the antibacterial layer may be 1 to 3mm, and the thickness of the backing layer may be 0.1 to 0.4mm.

The antibacterial fiber yarn may be needle-punched and protruding from the upper surface of the bubble layer.

The pile yarn may be composed of a monofilament yarn and a crimp yarn, and the monofilament yarn and the crimp yarn may include an antibacterial material.

The antibacterial material may include 0.1 to 5% by weight based on 100% by weight of each of the monofilament yarns and the crimp yarns.

The backing layer may further include an antibacterial material.

The antibacterial material included in the antibacterial layer may be exposed in one direction of the pile part by the antibacterial fiber yarn to exhibit antibacterial properties.

A synthetic resin adhesive layer may be further included between the antibacterial layer and the backing layer.

A filler layer filled with a filler including the antibacterial material may be further included between the bubble layer and the pile part.

When the artificial turf structure having antibacterial properties according to the present invention is used, an antibacterial layer containing an antibacterial material is formed on the bottom surface of the bubble layer, thereby preventing the propagation of mold or microorganisms due to the problem of prolonged exposure to the outside, and cleaning for a long time There is an effect that can provide an artificial turf structure that can maintain

In addition, a part of the antibacterial layer containing the antibacterial material penetrates the upper surface of the foam layer to form an antibacterial fiber layer made of antibacterial fibers on the bottom surface, thereby not only increasing the bonding strength between the foam layer and the antibacterial layer, but also improving the antibacterial properties of the artificial turf pile yarn There are advantages to doing it.

1 shows an artificial turf structure having antibacterial properties according to an embodiment of the present invention.
FIG. 2 is a perspective view in which an antibacterial layer and a backing layer of the artificial turf structure having antibacterial properties of FIG. 1 are separated.
FIG. 3 is an enlarged view of part A of FIG. 1 .
4 shows an artificial turf structure having antibacterial properties according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present invention pertains can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Throughout the specification, like reference numerals are assigned to similar parts.

An artificial turf structure having antibacterial properties according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4 .

1 shows an artificial turf structure having antibacterial properties according to an embodiment of the present invention, and FIG. 2 is a perspective view in which the antibacterial layer 20 and the backing layer 40 of the artificial turf structure having the antibacterial property of FIG. 1 are separated. 3 shows an enlarged view of part A of FIG. 1 , and FIG. 4 shows an artificial turf structure having antibacterial properties according to another embodiment of the present invention.

1 to 4 , the artificial turf structure having antibacterial properties according to the present embodiment includes a bubble layer 10 , an antibacterial layer 20 , a pile unit 30 , and a backing layer 40 .

Specifically, the foam layer 10, an antibacterial layer formed of a nonwoven fabric including an antibacterial material located on the lower surface of the foam layer 10, a plurality of napped through the foam layer 10 and the antibacterial layer 20 It is made of pile yarn, one side is located on the upper side of the bubble layer 10, the other side is located on the lower surface of the antibacterial layer 20, the pile part 30, and the lower surface of the antibacterial layer 20 and the pile part 30 ) in contact with the other side and includes a backing layer 40 formed of a non-woven fabric, wherein the antibacterial layer 20 penetrates the foam layer 10 and protrudes to the upper surface of the foam layer 10. characterized by including.

The foam layer 10 and the antibacterial layer 20 are integrally coupled in a stacked state, and the pile part 30 is napped through the foam layer 10 and the antibacterial layer 20 . One side of the pile part 30 is located on the upper side of the bubble layer 10 and the other side is located on the lower surface of the antibacterial layer 20 . The backing layer 40 is located under the other side of the pile part 30 and is connected to the other side of the pile part 30 to prevent separation of the pile part 30 . The backing layer 40, the pile part 30, the antibacterial layer 20 and the pile part 30 may be partially coupled to each other, and specifically, the antibacterial layer 20, the pile part ( 30) and the backing layer 40 are fused by heat to form a combined form.

The pile part 30 may be made of polyolefine, specifically polypropylene, polyethylene or polyethyleneterephthalate, and polyamide selected from the group consisting of It may be composed of a plurality of pile yarns made of one or more types. The central part (the other side of the pile part 30) of the pile yarn is located between the antibacterial layer 20 and the backing layer 40, and both ends (the pile part 30 one side) are the antibacterial layer 20 and the foam layer 10 ) through and exposed to the upper surface of the bubble layer 10 . Here, the pile yarns located on the bottom surface of the antibacterial layer 20 are melted by heat and coupled to each other, and the pile yarns located on the upper surface of the bubble layer 10 are separated from each other. In addition, the pile yarn may be a monofilament yarn 31 or a crimped crimp yarn 32 , and preferably a monofilament yarn 31 and a crimp yarn 32 may be mixed and used.

In addition, the monofilament yarn 31 and the crimp yarn 32 may include an antibacterial material.

The antibacterial material may include 0.1 to 5% by weight based on 100% by weight of each of the monofilament yarns 31 and the crimp yarns 32, and if the antibacterial material is less than 0.1%, the antibacterial effect is Insignificant, if it exceeds 5% by weight, there is a problem in that the manufacturing process of the pile yarn or the process workability of enlisting the pile yarns in the bubble layer is deteriorated, and the above range is preferable.

In addition, a filler may be installed to improve the uprightness and shock absorption of the pile yarns.

The filler may be silica sand or an elastic body, but is not limited thereto.

The foam layer 10 has a knitted fabric structure, and may be made of polypropylene having excellent chemical resistance, mechanical properties, and thermal properties. The bubble layer 10 may be melted at a temperature exceeding 120°C. The foam layer 10 may be made of natural fibers. Further, the base fabric layer 10 is from 80 to 120g / m ² can have an air permeability of 12 to 15cc / cm ² / sec.

The antibacterial layer 20 is located on the lower surface of the foam layer 10 and is formed of a nonwoven fabric made of polypropylene or polyester fiber. The polyester may be, for example, polyethylene terephthalate. The nonwoven fabric may be a short fiber nonwoven fabric, and the antibacterial layer 20 formed of the nonwoven fabric has a high absorbency, water retention and multi-density structure, and has the advantage of being able to freely change the thickness and preventing the formation of wrinkles. In addition, the antibacterial layer 20 formed of a nonwoven fabric does not unravel like a fabric, so it can be freely cut in any direction and has a wide range of strength and thus has excellent bulkiness.

The thickness of the antibacterial layer 20 may be formed to be thicker than the thickness of the bubble layer 10 , and specifically, may be 1 to 3 mm. If the thickness of the antibacterial layer 20 is less than 1 mm, there is a problem in that the tufting (raising) efficiency of the pile part 30 is lowered and processing workability artificial turf finished product shape instability and durability is lowered, and when it exceeds 3 mm, the artificial turf Since there are problems that may increase the weight of the grass structure, increase the fusion energy, and increase the manufacturing cost, the above range is preferable.

At least a portion of the antibacterial layer 20 (hereinafter referred to as the antibacterial fiber yarn 21) penetrates the foam layer 10 to form the antibacterial fiber yarn 21 protruding to the upper surface of the foam layer 10. In addition, since the antibacterial fiber yarn 21 is untied, it has an effect of bonding the foam layer 10 and the antibacterial layer 20 so that they are not separated. Accordingly, the antibacterial layer 20 and the foam layer 10 may be combined with each other even if they are melted and bonded, or are not bonded by an adhesive.

The antibacterial fiber yarn 21 may be needle-punched and protruding from the upper surface of the bubble layer 10 .

The antibacterial layer 20 may include an antibacterial material, and the antibacterial material may include 0.1 to 1% by weight based on 100% by weight of the total artificial turf structure. If it is out of the above content, the manufacturing cost of the antibacterial layer 20 may increase, and there is a problem in dispersion, so the above range is preferable.

As the antibacterial material, an inorganic metal material such as silver, copper, copper sulfide, or zinc may be used, and preferably copper sulfide may be used.

The copper sulfide is an antibacterial metal, and can impart an antibacterial effect to the antibacterial layer 20, and also has an effect of suppressing the growth of bacteria itself.

Since the copper sulfide has a widely distributed particle size, it is preferable to use modified copper sulfide fine particles.

The modified copper sulfide fine particles are prepared by preparing a copper compound, wet milling the copper compound to prepare copper compound fine particles, drying the copper compound fine particles at 90 to 150° C., the dried copper compound fine particles Dry-milling under nitrogen conditions, and classifying the dry-milled copper compound fine particles.

In addition, the copper compound may be cuprous sulfide or cuprous sulfide.

The wet milling is a method of making the copper compound into fine particles, and has an advantage in that it can be uniformly pulverized as compared to dry milling. The wet milling may use a general milling apparatus without particular limitation, for example, a ball mill apparatus or a bead mill capable of pulverizing particles more finely may be used, specifically, a basket mill, a dyno mill, A horizontal mill, a ring mill, or the like may be used. Preferably, it may be carried out in a manner that the copper compound mixed with water is rubbed with the zirconia beads.

The drying step is to prevent the wet-milled copper compound from re-aggregating due to moisture.

In the drying step, a known method such as spray drying, cheese drying, or hot air drying may be used, but among them, it is more preferable to use a spray drying method in terms of drying efficiency.

In the spray drying method, a copper compound containing a solvent is dried by spraying hot air through a nozzle, and it can be carried out at a temperature of 90 to 150 °C.

The dry milling is to prepare copper compound particles having a uniform size as a whole through wet milling, and then pulverize the copper compound re-agglomerated during drying into smaller and uniformly sized particles again through dry milling.

The dry milling is not particularly limited, but an air jet method using compressed air may be preferably used.

As an example, single track mill (SINGLE TRACK JET MILL®, SK JET-O-MILL®), co-jet system (Co-JET SYSTEM α-mkⅢ®), A-O jet mill ( AO JET MILL®) and the like can be used.

The modified copper sulfide fine particles prepared according to the above method may have an average diameter of 0.5 to 10 μm, specifically, 1 to 2 μm.

The antibacterial layer 20 is connected to the outside through the antibacterial fiber yarn 21 and pores are formed so that the antibacterial layer 20 may be connected to one side of the pile parts 30 and 10 . The antibacterial material included in the antibacterial layer 20 may be exposed to the outside through the antibacterial fiber yarn 21 to exhibit antibacterial properties, and antibacterial properties may also be imparted to the pile part 30 .

In addition, the antibacterial fiber yarn 21 may also serve to supply moisture to the antibacterial layer 20 . Accordingly, on the contrary, the moisture stored in the antibacterial layer 20 is vaporized in one direction of the pile part 30 through the antibacterial fiber yarn 21, thereby having an additional effect of lowering the temperature of the artificial turf structure.

The antimicrobial layer 20 includes a first fiber having a low melting point having a melting point of 120°C to 150°C, and a second fiber having a high melting point having a melting point of 200°C to 260°C. The fiber length of the first fiber and the second fiber may be 38 to 64 mm, the crimp rate may be 5 to 30%, and the fineness may be 3 to 8 denier. Accordingly, the antibacterial layer 20 may be melted at a temperature exceeding 120°C.

When the melting temperature of the first fiber is less than 120° C., the antibacterial layer 20 and the backing layer 40 are unstablely coupled, and the bonding property is lowered due to the difference in melting point between the pile yarn of the pile part 30 and the external temperature. There is a problem of other changes, and if the melting temperature of the first fiber exceeds 150° C., excessive melting energy is generated when the antibacterial layer 20 and the backing layer 40 are combined. If it is not economically desirable, the file There is a problem that the pile yarns of the part 30 are deformed, so the above range is preferable.

Since the first fiber is melted at 120° C. to 150° C., the amount of energy used for melting and the amount of carbon dioxide generated may be reduced. The second fiber can be used as a moisture absorption material to not only absorb the antibacterial material well, but also realize the effect of reducing the temperature of the artificial turf structure.

The first fiber may be coupled to the other side of the pile part 30 in a molten state. Accordingly, since the pile part 30 and the first fiber are melted and combined with each other, the pulling force of the pile part 30 may be improved. In addition, the first fiber may maintain a certain shape after combining with the second fiber and the pile unit 30 .

The antibacterial layer 20 may include the first fiber and the second fiber in a ratio of 10-50:50-90. If the first fiber is less than 10, there is a problem that the bonding strength with the backing layer 40 and the pile yarns may be reduced, and if the first fiber exceeds 50, it has an improved bonding strength, but When recycling, there is a problem that the separation of the backing layer 40, the antibacterial layer 20, and the pile part 30 is not easy, so the above range is preferable.

Meanwhile, the antibacterial layer 20 may be in the form of a nonwoven fabric manufactured using a composite yarn composed of a core portion and a sheath portion. Specifically, the core part of the composite yarn may be made of polypropylene or polyester, and the sheath part may be made of polyethylene or polypropylene.

The core part of the composite yarn may be the second fiber having a high melting point described above, and the sheath part may be the first fiber having a low melting point.

The antibacterial layer 20 made of the composite yarn may have a soft and uniform heat-sealability and high bulkiness and chemical resistance by the sheath portion.

In addition, the antibacterial layer 20 may be made of fibers having a melting point lower than the melting point of the composite yarn and the composite yarn, and the form may be a nonwoven fabric.

The backing layer 40 is formed of a nonwoven fabric made of polypropylene or polyester fiber. The polyester may be polyethylene terephthalate. The backing layer 40 formed of a nonwoven fabric has excellent mechanical strength and weather resistance, and no deformation or change in physical properties occurs even after long-term installation due to mechanical strength. The backing layer 40 has excellent water permeability and thus has an excellent drainage effect. In addition, it has the effect of dispersing the stress concentrated on the ground, so that it is possible to improve the bearing capacity of the road surface.

The backing layer 40 may be made of long fibers, and the long fibers of the backing layer 40 may be melted at a temperature exceeding 120°C. The long fibers of the backing layer 40 are melted and combined with the first fiber of the antibacterial layer 20 and the other side of the pile part 30 . Accordingly, the antibacterial layer 20 and the backing layer 40 connected to the pile part 30 and the bubble layer 10 are combined without using a separate adhesive, and are integrally formed to improve shape stability. There is an achievable effect.

Since the backing layer 40 is formed of a long fiber nonwoven fabric, it may be formed to a thinner thickness than the antibacterial layer 20 formed of a short fiber nonwoven fabric. The thickness of the backing layer 40 may be 0.1 to 0.4 mm. If the thickness of the backing layer 40 is less than 0.1mm, the air permeability is excellent, but there is a problem that processing workability, instability of the finished product shape and long-term durability may be lowered, and if it exceeds 0.4mm, air permeability is lowered and the fusion energy is excessive Since there is a problem that may be required, the above range is preferable.

The backing layer 40 may have a breathability of 340 to 350cc/cm ² /sec at 30 to 70 g/m ² , and if the air permeability is ^{less than 350 cc/cm 2} /sec, there is a problem that volleyball is not easy. range is preferred.

In addition, the backing layer 40 may be coupled to the other side of the pile part 30 , and in order to increase the rigidity of the bubble layer 10 and the backing layer 40 , the backing layer 40 has a liquid phase. It may further include an adhesive layer coated with a synthetic resin adhesive (Latex). By applying the liquid synthetic resin adhesive, the backing layer 40, the antibacterial layer 20, the other side of the pile part 30, and the bubble layer 10 are firmly fixed to each other, so as to increase the rigidity of the artificial turf structure having antibacterial properties. Durability may be improved.

The backing layer 40 may further include an antibacterial material, and the antibacterial material may be the same copper sulfide as the antibacterial layer 20 .

Next, the action of the artificial turf structure having the antibacterial properties described above will be described.

In a state in which the foam layer 10 and the antibacterial layer 20 including the antibacterial material are overlapped, a part of the antibacterial layer 20 , that is, the antibacterial fiber yarn 21 is formed in the antibacterial layer 20 in the antibacterial layer 20 . It penetrates through (10) and is exposed to the upper surface of the bubble layer (10). Through the antibacterial fiber yarn 21, the foam layer 10 and the antibacterial layer 20 are integrally coupled without an adhesive or fusion. In addition, the antibacterial material included in the antibacterial layer 20 is exposed in one direction of the pile part 30 by the antibacterial fiber yarn 21 to impart antibacterial properties to the pile yarn. The pile yarns constituting the pile part 30 are napped in the foam layer 10 and the antibacterial layer 20 formed integrally. On the lower surface of the antibacterial layer 20, the other side of the pile part 30 and the backing layer 40 are located, and the backing layer 40 is in contact with the lower surface of the antibacterial layer 20 and is melted with the other side of the pile part 30 and are connected to each other.

The first fiber of the antibacterial layer 20 and the other side of the pile part 30 are cured in a state of being melted and mixed with each other and bonded to each other, and the long fiber of the other side of the pile part 30 and the backing layer 40 . are melted and cured in a mixed state and bonded to each other. Here, the first fiber and the long fibers of the backing layer 40 are configured to surround the pile part 30 in a molten state, so that the pull-out strength of the pile part 30 and the antibacterial layer 20 is And peel strength between the backing layer 40 and the pile part 30 may be improved.

On the other hand, when rainwater is generated while the artificial turf structure having antibacterial properties is installed on the ground, the fluid flows to the antibacterial layer 20 made of a short fiber nonwoven fabric through the antibacterial fiber yarn 21 located on the bubble layer 10 . can be absorbed. The backing layer 40 is also formed of a nonwoven fabric so that the fluid absorbed into the antibacterial layer 20 is absorbed into the backing layer 40 . Therefore, due to the antibacterial layer 20 and the backing layer 40 formed of a nonwoven fabric, there is an effect that can also improve drainage.

In addition, when the temperature of one side of the pile part 30 is higher than the antibacterial layer 20 and the backing layer 40 in a state where the antibacterial layer 20 and the backing layer 40 absorb the fluid, the antibacterial layer (20), or the fluid stored on the backing layer 40 is vaporized through the antibacterial fiber yarn 21, there is also an additional effect of reducing the surface temperature of the artificial turf structure having antibacterial properties.

As such, the artificial turf structure according to an embodiment of the present invention includes an antibacterial layer 20 containing an antibacterial material and has an effect of exhibiting antibacterial properties, as well as the antibacterial layer 20 and the backing layer ( 40) is formed of this nonwoven fabric, so weather resistance and durability are high, fluid absorption and drainage efficiency is high by improving ventilation performance, temperature reduction and antistatic effect through hygroscopicity and breathability, and shape stability due to temperature change can be maintained. .

In addition, since the backing layer 40, the antibacterial layer 20, the bubble layer 10 and the pile part 30 are formed of polypropylene or polyester, that is, a similar material, the same physical properties through pulverization without a separation process after recovery It has the advantage of being able to recover the recycled resin of Accordingly, when replacing artificial turf, the amount of waste is significantly reduced and environmental pollution caused by waste treatment can be prevented.

In order to improve the antimicrobial properties and shock absorption of the artificial turf structure of the present invention, a filler layer filled with a filler including the antibacterial material may be further included between the foam layer 10 and the pile unit 30 .

The base resin constituting the filler may be styrene-ethylene-butadiene-styrene (SEBS) compatible with the olefin-based resin, but is not limited thereto.

In addition, the filler is configured to include the base resin and the modified cuprous sulfide mirissa, which is an antibacterial material, and its content is not limited.

In addition, the filler may include a process oil and an inorganic filler in addition to the base resin.

Hereinafter, preferred examples are presented to aid the understanding of the present invention, but the following examples are merely illustrative of the present invention and it will be apparent to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention, It goes without saying that such changes and modifications fall within the scope of the appended claims.

Preparation Example 1

Preparation of copper sulfide fine particles (modified copper sulfide fine particles)

A commercially available cuprous sulfide compound was purchased and prepared.

The cuprous sulfide compound and water were mixed in a wet milling apparatus, and zirconia beads were added and rubbed to perform wet milling.

The wet-milled cuprous sulfide compound was dried at 120° C. by a spray drying method (a method of drying a solvent-containing cuprous sulfide compound by spraying hot air through a nozzle).

The dried cuprous sulfide compound was dry milled under nitrogen conditions using an A-O JET MILL® and classified to prepare a modified cuprous sulfide compound.

Here, the size of the modified cuprous sulfide fine particles obtained by dry milling and classification is 0.5 to 3 μm.

Preparation 2

After mixing 90% by weight of polyethylene (PE), 3% by weight of maleic anhydride, 2.5% by weight of green masterbatch, 2.5% by weight of light flame retardant, and 2% by weight of cuprous sulfide fine particles prepared in Preparation Example 1 in a spinning machine, An antibacterial artificial turf pile yarn was prepared by melt spinning in a spinning machine.

Example 1: Preparation of artificial turf structure 1

First, the foam layer was prepared by using a yarn formed of polypropylene to form a knitted fabric structure fabric ^{to prepare a 100 g/m 2} foam layer sample.

Next, the antibacterial layer has a fiber length of 50 mm, a crimp rate of 20%, a fineness of 3 denier, a thickness of 3 mm using a first fiber having a melting point of 120° C. and a second fiber having a melting point of 220° C., and a weight After preparing a nonwoven fabric having a thickness of 120 g/m ² , an antibacterial layer sample was prepared by impregnating the cuprous sulfide fine particles prepared in Preparation Example. Here, short fibers were used as the first fibers and the second fibers.

Next, as the backing layer, a nonwoven fabric having a thickness of 0.4 mm was formed using a long fiber made of polypropylene to prepare a backing layer sample having ^{a weight of 50 g/m 2 .}

Next, the prepared antibacterial layer was laminated on the lower surface of the foam layer, punched with a needle punching machine to form antibacterial fiber yarns, and then pile yarns (monofilament yarns) made of polyethylene were napped.

Next, the pile yarn napped structure was put into a heating roller and heated to fusion-bond the antibacterial layer and the pile yarn protruding on the lower surface of the antibacterial layer.

Finally, the manufactured backing layer was fused to the bottom surface of the antibacterial layer to prepare an artificial turf structure having antibacterial properties.

Example 2: Preparation of artificial turf structure 2

An artificial turf structure having antibacterial properties was prepared by impregnating the backing layer with the cuprous sulfide fine particles of Preparation Example 1 as in Example 1.

Example 3: Manufacture of artificial turf structure 3

It was carried out in the same manner as in Example 1, except that when the monofilament pile yarn was napped to form the pile yarn, the crimped crimp yarn was also napped together to prepare an artificial turf structure having antibacterial properties.

Example 4: Manufacture of artificial turf structure 4

An artificial turf structure having antibacterial properties was prepared in the same manner as in Example 2, except that the pile yarn containing the cuprous sulfide fine particles prepared in Preparation Example 2 was napped in the bubble layer.

comparative example

A commercially available artificial turf including a back coating layer was prepared.

Experimental Example 1: Antimicrobial test of artificial turf structure

The antibacterial properties of the Innograss structures prepared according to Examples 1 to 4 and Comparative Examples were measured.

Antimicrobial evaluation method

ATP meter (TBD-1000, Telluron): Real-time bacterial microbe meter

After soaking the test swab in the measuring reagent, the pile yarn, the bubble layer, the antibacterial layer, and the backing layer of each sample were wiped with a test swab for 10 seconds, and the wiped test swab was put into the ATP meter for measurement.

To the samples, 50 ml of a liquid yogurt product was administered for the environment for microorganisms to occur, and the samples were left at room temperature for one day, and ATP levels were measured and shown in Table 1 below.

division Example 1 Example 2 Example 3 Example 4 comparative example antibacterial treatment face yarn X antibacterial antibacterial antibacterial X Thatch yarn X X antibacterial antibacterial X Bubble layer/antibacterial layer (antibacterial fiber yarn) antibacterial antibacterial antibacterial antibacterial X backing layer X X X antibacterial X ATP results Early 14 12 11 13 15 liquid yogurt
5 days after administration 133 115 95 56 9900<

(Measurement unit: RLU [Relative Light Unit]) As can be seen in Table 1 above, as a result of measuring bacteria and microorganisms 5 days after administration of liquid yogurt, Examples 1 to 4 were measured with low ATP levels, but in the case of Comparative Examples High ATP levels were confirmed.

Based on the above results, it can be confirmed that the artificial turf structures according to Examples 1 to 4 have an excellent antibacterial effect, and in particular, it can be confirmed that Examples 3 and 4 have a very excellent antibacterial effect.

When the artificial turf structure having antibacterial properties according to the present invention is used, an antibacterial layer containing an antibacterial material is formed on the bottom surface of the bubble layer, thereby preventing the propagation of mold or microorganisms due to the problem of prolonged exposure to the outside, and cleaning for a long time There is an effect that can provide an artificial turf structure that can maintain

In addition, since a part of the antibacterial layer containing the antibacterial material penetrates the upper surface of the foam layer to form the antibacterial fiber yarn, not only the bonding force between the foam layer and the antibacterial layer is increased, but also the antibacterial properties of the artificial turf pile yarn can be improved. .

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

1: artificial turf structure 10: bubble layer
20: antibacterial layer 21: antibacterial fiber yarn
30: pile part 31: monofilament yarn
32: crimp yarn 40: backing layer

Claims (16)

bubble layer,
An antibacterial layer positioned on the lower surface of the bubble layer and formed of a nonwoven fabric including modified copper sulfide fine particles having an average diameter of 0.5 to 10 μm, and having a thickness of 1 to 3 mm;
It consists of a plurality of pile yarns napped through the foam layer and the antibacterial layer, one side is located on the upper side of the foam layer, and the other side is located on the lower surface of the antibacterial layer.
It is in contact with the lower surface of the antibacterial layer and the other side of the pile part, is formed of a nonwoven fabric, and includes a backing layer having a thickness of 0.1 to 0.4 mm,
The antibacterial layer includes an antibacterial fiber yarn that penetrates through the foam layer and protrudes to the upper surface of the foam layer,
The modified copper sulfide fine particles include 0.1 to 1% by weight based on 100% by weight of the total artificial turf structure,
The antibacterial layer includes a first fiber having a melting point of 120 to 150° C. and a second fiber having a melting point of 200 to 260° C. in a weight ratio of 10 to 50:50 to 90,
The nonwoven fabric constituting the antibacterial layer and the backing layer,
It is made of polypropylene or polyester fibers,
The pile yarn is composed of a monofilament yarn and a crimp yarn,
The monofilament yarn and the crimp yarn each contain 0.1 to 5% by weight of modified copper sulfide fine particles based on 100% by weight,
A synthetic resin adhesive layer is included between the antibacterial layer and the backing layer,
An artificial turf structure having antibacterial properties that includes the modified copper sulfide fine particles on the upper surface of the bubble layer. delete delete delete According to claim 1,
The modified copper sulfide fine particles,
preparing a copper compound,
preparing copper compound fine particles by wet milling the copper compound;
Drying the copper compound fine particles at 90 ~ 150 ℃,
Dry milling the dried copper compound fine particles under nitrogen conditions, and
Characterized in that it is prepared in the step of classifying the dry-milled copper compound fine particles,
Artificial turf structure with antibacterial properties. 6. The method of claim 5,
The copper compound is
Characterized in that it is cuprous sulfide or cuprous sulfide,
Artificial turf structure with antibacterial properties. 6. The method of claim 5,
The wet milling is
It is performed by mixing water with the copper compound and then rubbing it with zircotia beads,
The dry milling is
An artificial turf structure having antibacterial properties, characterized in that it is carried out in an air jet device equipped with a spray drying device. delete delete delete delete delete delete delete delete delete

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