JPH0572982U - Pile yarn for artificial grass - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pile yarn for artificial turf, which improves workability during construction and suppresses cost. [Structure] Synthetic resin split yarn, split length L = 20 to 40 mm, and the width M of 0.5 to 2.5 mm for the trunk 1a of the yarn that forms the stitches with the split portion widened, while the yarn branch 1b The width B of B is in the range of B / M = 0.1 to 0.4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pile yarn used for artificial turf.

[0002]

[Prior Art]

 Various synthetic resin flat yarn textured yarns are used as raw yarns for artificial grass. For example, Japanese Utility Model Publication No. 51-49422 describes a dense layer having pores on one side, and Japanese Utility Model Publication No. 52-31825 describes one having ridges on both sides. In addition, other approaches such as twisting or twisting the flat yarn (Jitsuko Sho 55-47884) have been made to bring it closer to natural grass.

Furthermore, there are many pile yarns for artificial turf that use split yarns, and generally have a split length of 10 to 15 mm, and the trunk width M of the yarns forming the stitches in which the split portion is wide is 2 mm, The width B of the branches is approximately 1 mm (B / M = 0.5). A crimped product of such a split yarn is also found in JP-A-3-146737. This is because in artificial turf type of artificial turf that is normally used, sand once entered does not easily come out, has abrasion resistance, and is excellent in workability when tufted into the base fabric as pile yarn. Is.

[0004]

[Problems to be solved by the device]

 However, split-yarn type artificial turf had some problems during its construction, such as the use of special-purpose machines and the skill of craftsmen when sanding. Moreover, due to the shortage of manpower and soaring labor costs in recent years, the simplicity of construction has become more demanding than ever.

In order to facilitate sand sanding during this construction, an artificial turf made by bundling several thin flat denier flat monofilaments instead of split yarn as a pile yarn has been put on the market. On the other hand, since each thread is completely separated, the productivity is poor because the thread is entangled with the needle during tufting, and the cost of the pile thread is a problem. Therefore, it has been desired to improve the workability during construction and to develop a pile yarn that suppresses the cost.

[0006]

[Means for Solving the Problems]

 The structural features of the present invention are as follows. That is, it is made of a synthetic resin split yarn, the split length L is 20 to 40 mm, and the width M of the trunk 1a of the yarn forming the stitches in the state where the split portion is wide is 0.5 to 2.5 mm, whereas the branch 1b of the yarn is Is a pile yarn for artificial turf characterized by a width B of B / M = 0.1 to 0.4.

Here, the split length is set to 20 to 40 mm because when the tuft is tufted on the base fabric to make artificial turf, each split yarn is independent because the pile length is about 20 mm. The shape is similar to the one described above, which facilitates sand filling work. If the split length is too long, the productivity of the split yarn itself will be deteriorated, and further, the production efficiency will be deteriorated such that the yarn will be entangled with the needle during tufting, which is not preferable.

Next, regarding the ratio of the trunk 1a to the branch 1b of the split yarn, a B / M value closer to 0 is better for workability of sand piling, but on the other hand, sand once put in is likely to come out and tuft Time is also inefficient. Since the action of sand entering is difficult and the action of sand not coming out are contradictory, B / M = 0.1 is set as the limit point where the production efficiency during tufting is not affected, and B / M = 0.4 range Set based on required physical properties such as sand resistance and abrasion resistance due to the characteristics of synthetic resin.

[0009]

[Action]

 In the present invention, the split length L is set to 20 to 40 mm, so that each split yarn has a shape similar to that of an independent one, which facilitates sand filling work. Further, the width M of the thread trunk 1a is 0.5 to 2.5 mm and the width B of the thread branch 1b is B / M = 0.1 to 0.4, so that the sanding workability is good and the sand is hard to come out. Also, it becomes possible to meet demands for wear resistance and the like.

[0010]

【Example】

 An artificial turf was prepared by tufting pile yarns of the present invention (Examples A and B) and conventional products (Comparative Examples C and D), and their productivity and workability during construction were compared.

Example A Conditions Extrusion temperature 250 ° C. Stretching temperature 180 ° C. Annealing temperature 185 ° C. Stretching ratio 4 times Nylon resin was used as the resin, and the thickness was 7,000 denier and the thickness was 85 μ. The split length L was 35 mm, and the relationship between the trunk and the branches was M = 1.0 mm (B / M = 0.25). The thickness of the split yarn of the present invention was set to 85μ in order to improve the wear resistance. The tuft conditions were 1 twist / inch, and a 5/16 gauge tuft machine was used to create an artificial turf with a stitch interval of 4.3 stitches / inch and a pile length of 18 mm.

Example B Prototype Conditions Extrusion temperature 235 ° C. Stretching temperature 140 ° C. Annealing temperature 150 ° C. Stretching ratio 4.5 times Polypropylene resin (for extrusion stretching, MI 1.5) was used to obtain 7,500 denier and thickness 80 μ. The split length L was 30 mm, and the relationship between the trunk and the branches was M = 1.2 mm (B / M = 0.2). The tuft conditions are the same as in A above.

Comparative Example C (flat monofilament) Conditions Extrusion temperature 250 ° C. Stretching temperature 160 ° C. Annealing temperature 170 ° C. Stretching ratio 4 times Flattened monofilament with thickness (width / thickness) = (1.2 mm / 55 μ) using nylon resin. And I bundled 14 of these and tufted.

Comparative Example D (Split Yarn) Conditions Extrusion temperature 250 ° C. Stretching temperature 180 ° C. Annealing temperature 185 ° C. Stretching ratio 4 times Nylon resin was used to obtain 7,000 denier and thickness 55 μ. The split length L = 15 mm, and the relationship between the trunk and the branch is M = 1.5 mm (B / M = 0.5).

The items in Table 1 below were compared and evaluated.

[Table 1]

As a result, as shown in Table 1, the split yarn of the present invention can be used as a pile yarn for artificial grass that is well balanced in the above items. Similar results were obtained in the trial evaluation using polypropylene as a synthetic resin other than nylon.

[0017]

[Effect of the device]

 The present invention is an artificial turf type of sand containing sand that is easy to sand, does not easily release sand once entered, has abrasion resistance, and has a well-balanced product of artificial turf of the same type. is there.

[Brief description of drawings]

FIG. 1 is a plan view of an artificial grass pile yarn of the present invention in which a split portion is widened.

FIG. 2 is an enlarged view of a main part of the pile yarn for artificial grass of the present invention.

[Explanation of symbols]

 1a Artificial grass pile thread trunk 1b Artificial grass pile thread branches

Claims (1)

[Scope of utility model registration request] 1. A split yarn made of synthetic resin,
Split length L = 20 to 40 mm, width M of the trunk 1a of the stitches forming the stitch in the state where the split portion is widened is 0.5 to 2.5 mm, and width B of the yarn branch 1b is B / M = 0.1 to 0.4 Pile yarn for artificial turf, characterized in that