KR870000588B1 - Man-made grass's making method - Google Patents

Abstract

An artificial grass was made from synthetic fiber, monofilament. Thus, a crimped thread was tufted on a polypropylene, coated with SBR latex, and dried at 130≰C to give an artificial grass, which showed the protperties of denier=250, presure=9kg/cm2, V=50 m/min, K=26.8, and strength=3.5 g/d.

Description

Manufacturing method of artificial grass

Figure 1 shows a method for measuring the directionality of the artificial turf by dropping the ball on the artificial turf prepared according to the method of the present invention.

The present invention relates to a method for producing artificial grass made of synthetic fiber monofilament.

Conventionally, artificial turf is manufactured by weaving, knitting, or tufting by twisting monofilament, but in this case, if the load is applied to the artificial grass, the pile of the artificial grass is biased in the load direction. Not only was it late, it was difficult for the player to stay centered on the artificial grass and the ball bounced irregularly during the game.

The present inventors conducted a thorough analysis of the above problems, and found that the single filament of the monofilament, the nozzle air pressure, and the winding speed had a great influence on the monofilament and completed the present invention.

That is, the present invention is to produce artificial turf by weaving, knitting or tfting synthetic fiber monofilament, by using a crimp yarn in a suitable condition, the strength is good and there is no bias due to the load, the original recovery is not only fast, but also feel It is also an object of the present invention to provide a method for producing a very excellent artificial grass.

Hereinafter, the present invention will be described in detail.

In the present invention, in the manufacture of artificial turf by weaving, knitting or tuffing synthetic fibers and monofilaments, the monofilament of monofilament (D), nozzle air pressure (P), winding speed (V) is represented by the following equation (1): Method for producing artificial turf, characterized in that the use of crimp satisfies.

In more detail, the synthetic fiber filament is combined 4 to 10 and introduced into the nozzle through a force of pressure air at a temperature of 150 to 200 ℃, the pipe is 5 to 15mm in diameter and 5 to 25cm in length After being introduced into the nozzle to form a crimp, it is cooled at room temperature for 5 to 10 seconds and then wound at a constant speed. However, the detailed conditions at this time should be set so that the condition of Equation (1) is satisfied. In Equation (1), D denotes monofilament single yarn denier, P denotes air pressure of the nozzle (kg / cm²), and V Is the winding speed (m / min). Also, don't think about units in this relationship.

의 값을 K라고 할때, K의 값이 5이하이면 결과적으로 노즐 공기 압력이 낮아져 크림프가 형성되지 않으므로 인공잔디 위에서 하중을 가할 경우 인공잔디에 방향성이 생겨서 소기의 목적을 달성할 수 없고, 32이상이면 모노필라멘트에 격심한 공기압력이 가해져 강도가 저하되게 되고 촉감이 거칠어지는 등 단점이 생기므로 내구성이 떨어진다.According to the present invention in formula (1)

If the value of K is less than or equal to 5, the result is that the air pressure of the nozzle is lowered and thus the crimp is not formed. Therefore, when the load is applied on the artificial turf, the direction of the artificial turf is generated and the desired purpose cannot be achieved. If it is abnormal, severe air pressure is applied to the monofilament, so that the strength is lowered and the touch is rough.

The present invention will be described in detail by way of examples as follows.

EXAMPLE

After 8 pieces of monofilament having single yarn fineness under the conditions shown in Table 1, the monofilament was spun into a nozzle by compression under a specific pressure at 170 ° C, and then into a pipe nozzle having a diameter of 7 mm and a length of 10 cm. After forming the crimp, it was wound at the speed shown in Table 1 to prepare a crimp yarn.

The prepared crimped yarns were tipped on polypropylene foam paper to have a stitch density of 10 / inch and a pile height of 12 mm in a 5/32 gauge tafting machine, coated with SBR latex, and dried at 130 ° C. to artificial grass. Prepared.

Artificial grass produced in this way has the physical properties as shown in Table 1.

Table 1

In the present embodiment, the tactile evaluation criteria indicates that ◎ is extremely soft to a degree similar to that of natural grass, ○ is soft, × is poor, and ×× is extremely poor, and the directional measurement method is 3m as shown in FIG. The ball 1 was dropped by using a vacuum pump at the height of the ball, and the ball was dropped on the artificial turf 2. The angle θ of the bounded direction was measured by photographing the video camera 3. 4 is floor.

Artificial grass was prepared in the same manner as in Example, but the experimental conditions were changed as shown in Table 2 below, and the results are shown in Table 2.

[Table 2]

However, in this comparative example, the tactile evaluation criteria and the direction measurement method were the same as the examples.

As described above, if the value of K is 5 or less, the directionality of the artificial turf becomes large, and the athlete cannot use the free technique during the athletic game on the artificial turf, and it causes trouble in the game due to the irregular bounding of the ball. If it is more than 32, the strength of the monofilament is significantly reduced, which shortens the life of the artificial turf, and the touch of the artificial turf becomes rough, causing a lot of damage to the skin if it falls during the game.

On the other hand, the artificial turf produced according to the present invention has a K-value between 5 and 32, as shown in the examples, so that the direction is remarkably small compared to natural grass even when playing sports on artificial turf. You can feel the skill freely and feel the irregular bounds of the ball.

In addition, since the strength of the monofilament is large, the life of the artificial turf is relatively long, and the feel is also very soft.

Claims (2)

In the manufacture of artificial turf by weaving, knitting or tafting synthetic fiber monofilament, monofilament single yarn manifold (D), nozzle air pressure (P), and winding speed (V) satisfy criterion Method of manufacturing artificial grass, characterized in that.

The method of claim 1 wherein the monofilament uses nylon or polyester or polypropylene.

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