JP2008184860A - Artificial lawn and manufacturing method of artificial lawn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an artificial lawn which can be easily formed without troublesome manufacturing conditions etc. and can maintain the natural taste over a long period, as well as to provide a manufacturing method of the artificial lawn. <P>SOLUTION: A first lawn blade 11 and a second lawn blade 12 constituting lawn blades 1 are formed by a plurality kinds of synthetic resins having different heat shrinkage ratios, by which the lengths of the lawn blades 1 vary in shrinkage caused by heating the lawn blades 1, so that the natural taste can be obtained easily. Since the same kind of synthetic resin is used, the degree of flattening as a whole, even when it is caused, does not vary so much, whereby the natural taste can be maintained over a long period. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an artificial lawn formed using synthetic resin turf leaves and a method for producing the artificial lawn.

  In artificial grass using only synthetic resin turf leaves, it is difficult to obtain a texture similar to that of a natural lawn. A multipurpose ground pile yarn for artificial turf comprising a composite yarn having an inner layer of a resin composition comprising ˜99 wt% and polyethylene of 1 to 30 wt% and polyethylene as an outer layer is disclosed.

JP 2003-342848 A

  However, in the conventional artificial lawn as described in Patent Document 1, it is necessary to plant lawn leaves made of a plurality of types of resins at the same time, which may cause complicated manufacturing conditions. In addition, when the turf leaves made of one synthetic resin have sag, only the turf leaves made of the other synthetic resin stand up, and the natural texture is lost with time.

  The present invention has been made in view of the problems as described above, and can be easily formed without complicated production conditions and the like, and an artificial lawn and an artificial lawn capable of maintaining a natural texture for a long period of time. It is intended to provide a method for producing lawn.

  In order to achieve the above object, the present invention is configured as follows. That is, the artificial lawn according to the present invention is formed by planting synthetic resin turf leaves on a base fabric, and the turf leaves are formed from a plurality of types of synthetic resins having the same type and different heat shrinkage rates. It is characterized by being.

  According to the artificial lawn according to the present invention, the lawn leaves are formed from a plurality of types of synthetic resins having different thermal shrinkage rates, so that the length of the contracted lawn leaves when the lawn leaves are heated varies easily. A natural texture can be obtained. In addition, by using the same type of synthetic resin, even if dripping or the like occurs, there is no large difference in the overall degree, and a natural texture can be maintained for a long time.

  Here, the same type of synthetic resin, for example, polyethylene resin includes high-density polyethylene resin, low-density polyethylene resin, etc., and the thermal shrinkage rate varies depending on the grade and molding conditions of the yarn. Is the same type of polyethylene resin.

  The turf leaf includes first and second turf leaves having different heat shrinkage rates, and the difference in heat shrinkage rate between the first turf leaf and the second turf leaf is a temperature below the softening point of the synthetic resin. If it is 2 to 10%, variation in length can be caused without causing excessive deformation of the turf leaves, which is preferable.

  The artificial lawn manufacturing method according to the present invention is a method of planting lawn leaves formed using a plurality of types of synthetic resins of the same type and different heat shrinkage rates on a base fabric, and a temperature below the softening point of the synthetic resin. It is characterized by heating.

  According to the method for manufacturing an artificial lawn according to the present invention, the lawn leaves are formed from a plurality of types of synthetic resins having different heat shrinkage rates, so that the length of the contracted lawn leaves when the lawn leaves are heated varies. A natural texture artificial lawn can be obtained by a simple and simple process. In addition, by using the same type of synthetic resin, even if dripping or the like occurs, there is no large difference in the overall degree, and an artificial lawn that maintains a natural texture for a long time can be obtained. .

  Further, a backing material for preventing turf leaves is provided on the back surface of the base fabric on which the turf leaves are planted, and if the turf leaves are shrunk when the backing material is heated and cured, the backing material It is preferable because hardening and turf leaf shrinkage can be performed simultaneously to further simplify the process.

  According to the artificial lawn according to the present invention, the lawn leaves are formed from a plurality of types of synthetic resins having different thermal shrinkage rates, so that the length of the contracted lawn leaves when the lawn leaves are heated varies easily. A natural texture can be obtained. In addition, by using the same type of synthetic resin, even if dripping or the like occurs, there is no large difference in the overall degree, and a natural texture can be maintained for a long time.

  Further, according to the method for manufacturing an artificial lawn according to the present invention, the length of the turf leaf contracted when the turf leaf is heated by forming the turf leaf from a plurality of types of synthetic resins having different heat shrinkage rates. An artificial lawn with a natural texture can be obtained by a simple process. In addition, by using the same type of synthetic resin, even if dripping or the like occurs, there is no large difference in the overall degree, and an artificial lawn that maintains a natural texture for a long time can be obtained. .

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment according to the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an embodiment of an artificial lawn according to the present invention. The artificial lawn 10 has a polyethylene resin turf leaf 1 planted on a polypropylene resin base fabric 2, and the back surface of the base fabric 2 on which the turf leaf 1 is planted is intended to prevent the turf leaf 1 from coming off. A backing material 3 made of polyurethane resin is provided. The turf leaf 1 is composed of a first turf leaf 11 and a second turf leaf 12, and the thermal contraction rate by heating at 60 ° C. to 90 ° C. is about 5% larger for the second turf leaf 12. ing. The thermal contraction rate can be obtained from a reduction ratio of dimensions when a yarn used as the turf leaf 1 is cut into a length of 1 m and heated at a predetermined temperature (for example, 80 ° C.) for 10 minutes. The artificial lawn 10 in this embodiment is of a long pile type that fills the base fabric 2 with a filler, and the length of the first lawn leaf 11 is 40 to 75 mm. For example, when the heat shrinkage rate of the first turf leaf 11 is 3% and the heat shrinkage rate of the second turf leaf 12 is 8% at 80 ° C., the first and second turf leaves 1 are of the same length. When planted and heated to 80 ° C., the first turf leaf 11 and the second turf leaf 12 have a difference of 2 to 4 mm in the vicinity of the tip. A texture can be produced.

  The backing material 3 is a material in which a liquid polyurethane resin is applied to the back surface of the base fabric 2 and is cured by heating at 60 to 100 ° C. for 5 to 15 minutes. The lawn leaves 1 are contracted by setting the thermal contraction rate of the first lawn leaves 11 and the second lawn leaves 12 in accordance with the desired length difference generated in the plurality of types of lawn leaves 1. In addition, it is not necessary to perform heating separately, and the process relating to the formation can be further simplified.

  In order to make the turf leaves 1 have different heat shrinkage rates, when polyethylene resin is used, the physical properties of the same kind such as high density polyethylene, medium density polyethylene, low density polyethylene and linear low density polyethylene are used. Select different polyethylene resins, use fillers such as calcium carbonate and wood flour in the synthetic resin, change the degree of stretching during the molding of the yarn, and combine these means to achieve different heat The shrinkage rate can be set. Further, the turf leaves 1 having different heat shrinkage rates are not limited to those having two types of heat shrinkage rates as long as the same type of synthetic resin is used, and turf leaves 1 having three or more types of heat shrinkage rates are used. Also good.

It is a longitudinal cross-sectional view which shows one Embodiment of the artificial lawn concerning this invention.

Explanation of symbols

1 Lawn leaf 11 First lawn leaf 12 Second lawn leaf 2 Base fabric 3 Backing material 10 Artificial lawn

Claims (4)

An artificial lawn characterized in that synthetic turf leaves are formed by being planted on a base cloth, and the turf leaves are formed from a plurality of types of synthetic resins of the same type and different thermal shrinkage rates. The turf leaf includes first and second turf leaves having different heat shrinkage rates, and a difference in heat shrinkage rate between the first turf leaf and the second turf leaf is a temperature equal to or lower than a softening point of the synthetic resin. The artificial lawn according to claim 1, wherein the artificial lawn is 2 to 10%. Manufacture of an artificial lawn characterized by planting turf leaves formed using a plurality of types of synthetic resins of the same type and different heat shrinkage rates on a base fabric and heating them to a temperature below the softening point of the synthetic resin Method. The back surface of the base fabric on which the turf leaves are planted is provided with a backing material for preventing the turf leaves from being removed, and the turf leaves are shrunk when the backing material is heated and cured. Item 4. A method for producing an artificial lawn according to Item 3.

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