KR102424151B1 - High permeability artificial turf pile yarn and its manufacturing method - Google Patents

Abstract

The objective of the present invention is to provide a pile yarn for artificial turf that makes it possible not only to improve light transmittance by using no pigment, but also to prevent a user from getting burned and blinded by the sunlight by lowering absorptance. The present invention relates to a highly permeable pile yarn for artificial turf which comprises a polyolefin resin and a nucleating agent, and which has a light transmittance of greater than or equal to 50%.

Description

High permeability artificial turf pile yarn and its manufacturing method

The present invention relates to a high permeability artificial turf pile yarn and a manufacturing method thereof.

Artificial turf is used as a substitute for natural turf, and the demand for turf fields is increasing due to the expansion of leisure life. It is installed in the yard of a house or the roof garden of a building and is widely used to provide a beautiful view.

The temperature of the artificial turf playground is 15℃ higher than the temperature of the natural turf playground, and it absorbs the sun's heat and the resulting high temperature is aggravated by the heatsink phenomenon, approaching 60~75℃. In particular, when sliding on an artificial turf playground with a surface temperature of over 60°C, frictional heat is added and, in severe cases, skin burns occur, and fatigue increases due to high temperature, which makes the feeling of use not good.

An attempt was made to lower the surface temperature of the artificial turf playground by supplying moisture to solve the shortcomings of the sudden temperature rise in the artificial turf playground. When this is supplied, the time to see the effect is only about 20 minutes, which is very limited, and the effect is also insignificant.

In addition, the artificial turf piles contain pigments during manufacture, but in the case of piles containing pigments, some light is reflected and scattered to cause glare, and the light absorption rate is increased to improve the temperature of piles.

Accordingly, there is a need for a technology capable of lowering the surface temperature of pile yarn without including a pigment.

Registered Patent No. 10-1842999 (2018.03.22.)

The problem to be solved by the present invention is to provide a pile yarn for artificial turf that can improve light transmittance, prevent user burns by lowering light absorption, and prevent glare by not using a pigment.

An embodiment of the present invention is a high-transmittance artificial turf pile yarn containing a polyolefin resin and a nucleating agent, and having a light transmittance of 50% or more.

The polyolefin resin is one selected from the group consisting of linear low density polyethylene (LLDPE, Linear Low Density Polyethylene), low density polyethylene (LDPE, Low Density Polyethylene), high density polyethylene (HDPE, High Density Polyethylene) and polypropylene (PP, Polypropylene) may be more than

The nucleating agent may be at least one selected from the group consisting of a substituted sorbitol, a salt of a carboxylic acid, a low molecular weight polyolefin, an ionomer resin, and an organic phosphate salt.

The crystallinity of the high permeability artificial turf pile yarn may be 40% or less.

The high permeability artificial turf pile yarn may further include a flame retardant and a weathering agent.

The high permeability artificial turf pile yarn may contain 98.5 to 99.5 wt% of a polyolefin resin, 0.01 to 0.5 wt% of a nucleating agent, 0.01 to 0.5 wt% of a flame retardant, and 0.01 to 0.5 wt% of a weathering agent.

Another embodiment of the present invention comprises the steps of mixing and spinning a polyolefin, a nucleating agent, a flame retardant and a weathering agent; And stretching the radiation; including, a light transmittance of 50% or more is a method of manufacturing a high-transmittance artificial turf pile yarn.

In the spinning step, 98.5 to 99.5% by weight of a polyolefin resin, 0.01 to 0.5% by weight of a nucleating agent, 0.01 to 0.5% by weight of a flame retardant, and 0.01 to 0.5% by weight of a weathering agent may be mixed and spun.

The spinning may be carried out at 180 ~ 280 ℃.

The stretching may be performed at a stretching ratio of 2 to 5.

By limiting the light transmittance to 50% or more, the present invention can provide a high transmittance artificial turf pile yarn having low light absorptivity and reflectance, and excellent light transmittance and temperature reduction effect.

The present invention can provide a high transmittance artificial turf pile yarn having excellent light transmittance and excellent radioactivity by including a nucleating agent in a specific content without using a pigment.

The present invention can provide a highly permeable artificial turf pile yarn excellent in radiation by limiting the degree of crystallinity to 40% or less.

1 is a view showing an artificial turf structure in which the high permeability artificial turf pile yarn of the present invention is tufted.
2 is a view showing the artificial turf structure in which the high permeability artificial turf pile yarn of the present invention is manufactured by mono pile yarn and crimp yarn and tufted.

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 several different forms and is not limited to the embodiments described herein. Throughout the specification, like reference numerals are assigned to similar parts.

The high permeability artificial turf pile yarn according to the present invention can reduce the process of spinning and weaving a separate pile yarn for a line, and can reduce the number of man-hours for inserting a line, thereby improving productivity and constructability.

In addition, the high permeability artificial turf pile yarn does not contain a pigment, and by maintaining transparency, it is possible to minimize light absorption, thereby lowering the temperature of the pile yarn. In addition, it is possible to provide a comfortable environment by minimizing light reflection to prevent glare of the user.

1 is a view showing an artificial turf structure in which the high permeability artificial turf pile yarn of the present invention is tufted, and FIG. 2 is a tufted artificial turf structure in which the high permeability artificial turf pile yarn of the present invention is manufactured by a mono pile yarn and a crimp yarn. the drawing shown.

1 and 2 , the highly permeable artificial turf pile yarn 110 may be used as the mono pile yarn 111 or may be used as the crimp yarn 112 , and the mono pile yarn 111 and the crimp yarn 112 . ) can be used together or separately.

Hereinafter, the high permeability artificial turf pile yarn of the present invention will be described in detail.

The high permeability artificial turf pile yarn 110 which is an embodiment of the present invention includes a polyolefin resin and a nucleating agent, and has a light transmittance of 50% or more.

The polyolefin resin is one selected from the group consisting of linear low density polyethylene (LLDPE, Linear Low Density Polyethylene), low density polyethylene (LDPE, Low Density Polyethylene), high density polyethylene (HDPE, High Density Polyethylene) and polypropylene (PP, Polypropylene) It may be more than one, preferably, it may be a linear low density polyethylene (LLDPE, Linear Low Density Polyethylene).

In the present invention, the nucleating agent is added to increase the crystallization rate of the polyolefin resin and improve the transparency of the pile yarn, and the nucleating agent is a substituted sorbitol, a salt of a carboxylic acid, a low molecular weight polyolefin, an ionomer resin, and an organic phosphate. It may be at least one selected from the group consisting of salts, and may preferably be organic phosphate salts. The organic phosphate salt may be at least one selected from the group consisting of zinc phenyl phosphate, sodium-2,2-methylenebis phosphate and sodium diphosphate.

The high transmittance artificial turf pile yarn 110 may have a light transmittance of 50% or more, preferably 60 to 80%. If the light transmittance is less than 50%, it is difficult to implement transparency and the light absorption rate is increased, so that the temperature reduction effect of the pile yarn 110 may be reduced.

In addition, when the light transmittance exceeds 80%, the degree of crystallinity of the pile yarn may increase and cutting may occur, and productivity and radioactivity may be reduced.

The degree of crystallinity of the highly permeable artificial turf pile yarn 110 may be 40% or less, preferably 20-40%. If the crystallinity of the high-permeability artificial turf pile yarn 110 exceeds 40%, cutting may occur, productivity and radiation may be reduced, and if less than 20%, the light transmittance is low and the temperature reduction efficiency may be reduced.

The high permeability artificial turf pile yarn 110 may further include a flame retardant and a weathering agent, and specifically, the high permeability artificial turf pile yarn 110 is a polyolefin resin 98.5 to 99.5 wt%, a nucleating agent 0.01 to 0.5 wt%, It may contain 0.01 to 0.5% by weight of a flame retardant and 0.01 to 0.5% by weight of a weathering agent.

If the content of the nucleating agent in the present invention is less than 0.01% by weight, the light transmittance may be reduced, and if it exceeds 0.5% by weight, cutting may occur, and productivity and radioactivity may be reduced.

The flame retardant may be a non-halogen flame retardant, and the non-halogen flame retardant may be at least one non-halogen flame retardant selected from the group consisting of magnesium oxide, bentonite-modified antimony, sodium ammonium ammonium, aluminum hydroxide and zinc borate, or melamine cyanurate. have. The content of the flame retardant may be 0.01 to 0.5% by weight, and may exhibit excellent flame retardancy while maintaining light transmittance within the above range.

The weathering agent may be a benzophenone-type or amine-type weathering agent, preferably a cyclic amine oligomer. The content of the weathering agent may be 0.01 to 0.5% by weight, and may exhibit excellent durability while maintaining light transmittance within the above range.

As described above, the high-permeability artificial turf pile yarn 110 according to the present invention can improve light transmittance by including a nucleating agent in a specific content, thereby improving temperature reduction efficiency and improving radioactivity.

The foam layer 120 is a place where the high permeability artificial turf pile yarn 110 is tufted, and may be at least one selected from the group consisting of polyolefin-based woven fabric, polyester-based woven fabric, and non-woven fabric. , Specifically, the polyolefin-based woven fabric may be a polypropylene woven fabric.

The backing layer 130 serves to strengthen the shape stability of the artificial turf structure 100, reduce noise, strengthen the tear strength, and strengthen the pull-out strength of the pile, and is formed of a material such as polyolefin, polyester, latex, SBR, PU. It may be, and preferably may be formed of a long fiber nonwoven fabric made of polypropylene, polyester, or the like. The polyester may be polyethylene terephthalate, and the backing layer formed of the long fiber nonwoven fabric has excellent mechanical strength and weather resistance, and deformation and physical properties do not occur even after long-term installation due to mechanical strength.

In addition, the backing layer 130 has excellent water permeability, so it can have an excellent drainage effect, and has an effect of dispersing stress concentrated on the ground, thereby improving the bearing capacity of the road surface.

The artificial turf structure 100 may further include silica sand or a filler on the upper surface of the foam layer 120 , and the silica sand and the filler may be used without limitation as long as the silica sand and the filler generally used in the artificial turf structure are used.

Another embodiment of the present invention comprises the steps of mixing and spinning a polyolefin, a nucleating agent, a flame retardant and a weathering agent; And stretching the radiation; including, a light transmittance of 50% or more is a method of manufacturing a high transmittance artificial turf pile yarn 110.

In the spinning step, 98.5 to 99.5% by weight of a polyolefin resin, 0.01 to 0.5% by weight of a nucleating agent, 0.01 to 0.5% by weight of a flame retardant, and 0.01 to 0.5% by weight of a weathering agent may be mixed and spun.

The description of the polyolefin, the nucleating agent, the flame retardant and the weathering agent is the same as that described above, and the description of the light transmittance and high transmittance artificial turf pile yarn 110 is also the same as that described above.

The spinning may be carried out at 180 ~ 280 ℃, preferably may be carried out at 200 ~ 250 ℃. The spinning pressure may be 10 to 18 MPa, preferably 12 to 15 Mpa.

If the spinning temperature is less than 180 ℃, discharging may not be easy because melt mixing of polyolefin, nucleating agent, flame retardant and weathering agent is not easy. can be

In addition, if it is out of the pressure range during spinning, it may not be easy to discharge the yarn, or cutting may occur.

The stretching may be performed at a stretching ratio of 2 to 5.

If the draw ratio is less than 2, the elongation may be excessive because the elongation may not be sufficiently performed, and if it exceeds 5, the elongation may be excessive due to the insufficient elongation, thereby reducing the physical properties of the pile yarn 110 for use for artificial turf. have.

The method of manufacturing the highly permeable artificial turf pile yarn 110 may further include, after the stretching step, heat shrinking to produce a crimp yarn.

The heat shrinkage may be performed at 130 ~ 220 ℃, preferably heat shrinkage may be performed at 180 ~ 210 ℃. If the heat shrinkage temperature is less than 130 ℃, the crimp rate of the pile yarn may decrease, and if it exceeds 220 ℃, the yarn may be melted.

Hereinafter, specific examples according to the present invention will be described.

Example 1

99.1 wt% of linear low-density polyethylene (LLDPE), 0.3 wt% of a nucleating agent (sodium diphosphate), 0.3 wt% of a weathering agent (substituted amine oligomer), and 0.3 wt% of a non-halogenated flame retardant (magnesium oxide) are mixed at 230-240°C and spun at 12 to 15 MPa. Thereafter, the spun pile yarn was put into a cooling water bath at 25° C. to cool it, and the high permeability artificial turf pile yarn was prepared by stretching it to a length of 4 times at 90° C. for 4 minutes using a stretching roll.

Example 2

A pile yarn was prepared in the same manner as in Example 1, except that in Example 1, 99.39% by weight of linear low-density polyethylene (LLDPE), 0.01% by weight of a nucleating agent, 0.3% by weight of a weathering agent, and 0.3% by weight of a flame retardant were mixed.

Example 3

A pile yarn was prepared in the same manner as in Example 1, except that in Example 1, 99.3% by weight of linear low-density polyethylene (LLDPE), 0.1% by weight of a nucleating agent, 0.3% by weight of a weathering agent, and 0.3% by weight of a flame retardant were mixed.

Example 4

A pile yarn was prepared in the same manner as in Example 1, except that in Example 1, 98.9% by weight of linear low-density polyethylene (LLDPE), 0.5% by weight of a nucleating agent, 0.3% by weight of a weathering agent, and 0.3% by weight of a flame retardant were mixed.

Example 5

A pile yarn was prepared in the same manner as in Example 1, except that in Example 1, 98.4% by weight of linear low-density polyethylene (LLDPE), 1% by weight of a nucleating agent, 0.3% by weight of a weathering agent, and 0.3% by weight of a flame retardant were mixed.

Example 6

A pile yarn was prepared in the same manner as in Example 1, except that low-density polyethylene (LDPE) was used instead of linear low-density polyethylene (LLDPE) in Example 1.

Example 7

A pile yarn was prepared in the same manner as in Example 1, except that high-density polyethylene (HDPE) was used instead of linear low-density polyethylene (LLDPE) in Example 1.

Example 8

A pile yarn was prepared in the same manner as in Example 1, except that polypropylene (PP) was used instead of linear low-density polyethylene (LLDPE) in Example 1.

Comparative Example 1

A pile yarn was prepared in the same manner as in Example 1, except that in Example 1, 99.395 wt% of linear low-density polyethylene (LLDPE), 0.005 wt% of a nucleating agent, 0.3 wt% of a weathering agent, and 0.3 wt% of a flame retardant were mixed.

Comparative Example 2

A pile yarn was prepared in the same manner as in Example 1, except that polyethylene terephthalate (PET) was used in Example 1.

Comparative Example 3

A pile yarn was prepared in the same manner as in Example 1, except that nylon was used in Example 1.

Experimental Example 1

The spinning workability, crystallinity, light transmittance and temperature reduction efficiency of the pile yarns prepared in Examples 1 to 5 and Comparative Example 1 were measured by the following measuring methods, and the results are shown in Table 1 below.

[How to measure]

Spinning workability: Check whether cutting

Crystallinity degree of pile yarn: Measure the heat capacity value of each sample using a Differential Scanning Calorimeter, and the degree of crystallization by comparing the heat capacity value of each sample to the 100% crystallized theoretical heat capacity value of PE (LDPE, HDPE, etc.) confirmed

Light transmittance (%): Check as the value obtained by dividing the intensity of transmitted light by the intensity of incident light by irradiating the sample with light using a haze meter

Temperature increase rate (%): After irradiating the light irradiator at a distance of 300 mm from the sample surface for 15 minutes, the surface temperature of the sample is measured and confirmed as the ratio of the temperature increased to the initial temperature

division Nucleating agent (wt%) spinning workability Crystallinity (%) Light transmittance (%) Temperature rise rate (%) Example 1 0.3 Good 32.2 75.2 79 Example 2 0.01 Good 22.3 62.3 95 Example 3 0.1 Good 27.5 69.7 86 Example 4 0.5 Good 37.8 78.2 72 Example 5 1.0 bad (truncation) 47.3 - - Comparative Example 1 0.005 Good 21.8 46.3 (Bad) 115

Referring to Table 1, when the content of the nucleating agent is 0.005% by weight (Comparative Example 1), the light transmittance was very low as 46.3%, so transparency could not be realized, and when the content of the nucleating agent was 1% by weight (Example 5) ) had a very high crystallinity of 47.3%, which caused cut-off during spinning or stretching.

In addition, when the content of the nucleating agent is 0.01 to 0.5% by weight (Examples 1 to 4), the light transmittance is excellent at 50% or more, thereby confirming that the temperature increase rate (%) is low.

Experimental Example 2

The radiation workability and light transmittance of the pile yarns prepared in Examples 1, 6 to 8, and Comparative Examples 2 and 3 were measured by the following measuring method, and the results are shown in Table 2 below.

[How to measure]

Spinning workability: Check whether cutting

Light transmittance (%): Check as the value obtained by irradiating light to the sample using a haze meter and dividing the intensity of transmitted light by the intensity of incident light

division Resin spinning workability light transmittance (%) Example 1 LLDPE Good 75.2 Example 6 LDPE Good 70.2 Example 7 HDPE Good 68.2 Example 8 PP Good 69.3 Comparative Example 2 PET N.G. - Comparative Example 3 nylon N.G. -

Referring to Table 2, when PET (Comparative Example 2) or nylon was used, the spinning workability was very low, and the light transmittance could not be measured due to cutting, and the light transmittance of LLDPE was the best among polymers. can be checked

As such, referring to the above embodiment, the high permeability artificial turf pile yarn according to the present invention contains a specific nucleating agent, so that the light transmittance is 50% or more, the crystallinity is 40% or less, and thus excellent temperature reduction efficiency and excellent radioactivity can indicate

Although preferred embodiments of the present invention have 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

100: artificial turf structure 110: pile yarn
111: mono pile yarn 112: crimp yarn
120: bubble layer 130: backing layer

Claims (10)

Linear low density polyethylene resin 98.5 ~ 99.5% by weight, containing 0.01 ~ 0.5% by weight of nucleating agent, 0.01 ~ 0.5% by weight of flame retardant and 0.01 ~ 0.5% by weight of weathering agent, light transmittance is 60 ~ 80%, crystallinity is 20 ~ 40% Phosphorus, high permeability artificial turf pile yarn.
delete The method of claim 1,
The nucleating agent is a high permeability artificial turf pile, characterized in that at least one selected from the group consisting of substituted sorbitol, a salt of a carboxylic acid, a low molecular weight polyolefin, an ionomer resin, and an organic phosphate salt.
delete delete delete 98.5 to 99.5 wt% of a linear low-density polyethylene resin, 0.01 to 0.5 wt% of a nucleating agent, 0.01 to 0.5 wt% of a flame retardant, and 0.01 to 0.5 wt% of a weathering agent mixing and spinning; and
stretching the spun;
including,
A method of manufacturing a high transmittance artificial turf pile yarn having a light transmittance of 60 to 80% and a crystallinity of 20 to 40%.
delete 8. The method of claim 7,
The spinning is a method of manufacturing a high permeability artificial turf pile, characterized in that carried out at 180 ~ 280 ℃.
8. The method of claim 7,
The stretching is a method of manufacturing a high permeability artificial turf pile yarn, characterized in that performed at a draw ratio of 2 to 5.

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