KR102081057B1 - Method for manufacturing highly sensitive double-sided interlock circular knitted fabric in which elastic yarn is knitted only on back - Google Patents

Abstract

The present invention relates to a method for manufacturing a highly sensitive double-sided interlocked circular knitted fabric, which comprises a step of supplying a nylon yarn of 40D/34F and an elastic yarn of 55D to a double-sided circular knitting machine with a yarn tension of 2.5 to 3.5 gf, and performing knitting in a double-sided interlocked tissue at a condition that a dial side knitting needle feeding angle is 20 to 25 degrees of nylon yarn and 30 to 45 degrees of the elastic yarn, and a draft ratio of the elastic yearn is 3.0 to 3.5. The double-sided interlocked tissue is knitted with the elastic yarn only on a skin surface. According to the present invention, the weight of a circular knitting fabric is reduced by knitting the elastic yarn only on the skin, a problem of knitting and process detects is reduced, glittering is not generated since the elastic yarn does not protrude from a surface, and internal moisture and heat can be easily discharged to the outside.

Description

Method for manufacturing highly sensitive double-sided interlock circular knitted fabric in which elastic yarn is knitted only on back}

The present invention relates to a method of knitting a high-density double-sided interlock circular knitted fabric by simultaneously supplying a nylon yarn and an elastic yarn, which is a fine-seam yarn, and when the elastic yarn is used as an auxiliary yarn in knitting a conventional double-sided interlock circular knitted fabric, the elastic yarn has a surface and skin surface. Since it is knitted on both, the present invention relates to a method for producing a highly sensitive double-sided interlock circular knitted fabric in which the elastic yarn as an auxiliary yarn in double-sided interlock knitting is knitted only on the skin surface side.

Recently, as demand and interest for sportswear and outdoor products for sports activities are increased, high-performance, highly sensitive circular knitted fabrics are being developed in various forms. The characteristics required in such highly sensitive circular knitted fabrics require that the circular knitted fabrics themselves have high quality, including elasticity, light weight, moisture permeability, durability, and environmental friendliness.

The circular knitting machine includes a needle composed of a rotary dial and a cylinder, and the needle is mounted with a plurality of cam modules. And, by the cam module to knit the circular knitting by knitting the knitting while the axial movement in the axial movement. A circular knitting machine composed of a rotary dial and a cylinder may be referred to as a double cylindrical circular knitting machine.

A plurality of moving slits are formed in the cylinder, and moving slits are formed radially on the outer circumferential surface of the rotary dial to correspond to the moving slits. Then, the horizontal knitting needle and the horizontal knitting needle are coupled to the rotary dial and the moving slit of the cylinder, respectively. The horizontal knitting needles and the vertical knitting needles can knit double-sided interlock circular knitted fabrics while axially reciprocating by the cam module.

When knitting a double-sided interlock circular knitted fabric, it is widely used for yoga clothes, sportswear, fitness clothes, and outdoor wear because it has a high elasticity when knitted together with general yarns and elastic yarns. Double-sided interlock circular knitted fabrics for this purpose, while having the above-mentioned characteristics, should not be stretchy enough to cause discomfort to the user when actually wearing and performing activities, and in the course or wale direction. The difference in elongation should not be large.

On the other hand, the double-sided interlock circular knitted fabric knitted together with the elastic yarn generally gives a low quality image due to the unevenness of the elastic yarn in the stretched portion of the circular knitted fabric, which gives the user negative recognition.

In order to solve this problem, in the double-sided interlock circular knitted fabric including the elastic yarn, the elastic yarn is included on both the surface and the skin surface to be knitted. The elastic yarn is not knitted on the surface, and the elastic yarn is knitted only on the skin surface side. It is essential. Thus, by knitting the elastic yarn only on the skin surface, it is possible to reduce the weight of the entire circular knitted fabric, to properly control the stretching force, and there is no elastic yarn on the surface to improve the image of low quality due to the flashing of the elastic yarn during stretching. .

Korea Patent Registration No. 10-1957035 Korea Patent Registration No. 10-1742699

The present invention is to knit the elastic yarn only on the skin surface in knitting the double-sided interlock circular knitted fabric divided into the surface and the skin surface by using nylon yarn and elastic yarn, so as to achieve the effect of improving the lightness and recovery rate, reduction of thickness and stretch force While providing a method of manufacturing a highly sensitive double-sided interlock circular knitted fabric in which elastic yarn is knitted only on the skin surface, which can significantly reduce problems such as knitting defects, knitting needle damage, gastric phenomena, and coarse wires.

In order to achieve the above object, the present invention supplies 40D / 34F nylon yarn and 55D elastic yarn to the double-sided circular knitting machine with a dead force of 2.5 to 3.5 gf, and the dial side knitting needle angle is 20 to 25 degrees of nylon and 30 to 45 degrees of elastic yarn. , The draft ratio of the elastic yarn comprises the step of knitting into a double-sided interlock tissue under the condition of 3.0 to 3.5, the double-sided interlock tissue provides a method for producing a highly sensitive double-sided interlock circular knitted fabric, characterized in that the elastic yarn is knitted only on the skin surface do.

In addition, the 40D / 34F nylon yarn is a tactel twisted yarn made of nylon 66, the 55D elastic yarn provides a method for producing a highly sensitive double-sided interlock circular knitted fabric, characterized in that the lycra elastic yarn.

On the other hand, the loop length of 40D / 34F nylon of the surface of the double-sided interlock tissue is 80-100 mm, the loop length of the skin surface is 70-100 mm and the loop length of the surface is the same as the loop length of the skin surface, or the surface loop length of the skin surface is It provides a method for producing a highly sensitive double-sided interlock circular knitted fabric, characterized in that it is larger than the loop length.

The circular knitted fabric knitted with the double-sided interlock structure thus prepared is characterized in that the stretch ratio is 1.08 to 1.32, and the thickness is 0.68 to 0.84 mm.

The high-sensitive double-sided interlock circular knitted fabric according to the present invention includes elastic yarns only on the skin surface, so that the shrinkage due to the stretching force after knitting is less than that of the general double-sided interlock circular knitted fabric, thereby reducing the weight, thickness and stretching force of the circular knitted fabric.

Since the highly sensitive double-sided interlock circular knitted fabric according to the present invention is not knitted on the surface of the elastic yarn, the appearance of the high quality circular knitted fabric is eliminated by eliminating the glare from the elastic yarn.

The surface length of the double-sided interlock circular knitted fabric is larger than that of the skin surface, so that the surface can be easily stretched when the circular knitted fabric is stretched, and the sweat and heat inside the sportswear can be easily discharged. The stretching force is retained, and the difference between the stretching force in the wale direction and the course direction can be minimized.

In addition, the highly sensitive double-sided interlock circular knitted fabric according to the present invention reduces defects in the manufacturing process of the circular knitted fabric designed by applying a cylinder and a dial cam to include elastic yarns on only one side in a general double-sided interlock circular knitting machine when knitting. You can.

Description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as limited by the embodiments described in the text. That is, since the embodiments may be variously modified and may have various forms, the scope of the present invention should be understood to include equivalents for realizing the technical idea. In addition, the objects or effects presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereby.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. The terms defined in the commonly used dictionary should be interpreted to coincide with the meanings in the context of the related art, and should not be interpreted as having ideal or excessively formal meanings unless clearly defined in the present application.

In general, when knitting a double-sided interlock circular knitted fabric, a general yarn and an elastic yarn are supplied at a ratio of 1: 1 to 1: 2 so that the surface and the skin surface are knitted to have the same tissue. In the double-sided interlock circular knitting method, in order to include the elastic yarn only on the skin surface without knitting the elastic yarn on the surface, it is necessary to design a separate cam suitable for this, unlike the conventional double-sided interlock knitting cylinder and dial cam.

Nevertheless, in the process of manufacturing double-sided interlock circular knitted fabrics in which elastic yarns are knitted only on the skin surface, nylon fine yarns and elastic yarns in high-density circular knitted fabrics are broken and cuts frequently occur, resulting in a process loss rate of 40%. An abnormality occurs and knitting becomes impossible.

In addition, in the knitted fabric thus produced, running phenomenon occurs when the alley is loosened even in the occurrence of weakness and weak force. Thus, the tension of yarn being supplied, the degree of steepness, the loop length, the draft ratio of the elastic yarn supplied, etc. It is necessary to control the conditions precisely to solve the problem of process defect and quality defect.

Yarns used in the production of highly sensitive double-sided interlock circular knitted fabrics in which elastic yarns are knitted only on the skin surface of the present invention are supplied with 40D / 34F nylon yarns and 55D elastic yarns with a dead force of 2.5 to 3.5 gf. More preferably, the 40D / 34F nylon yarn is nylon taxel twisted yarn made of nylon 66, and the 55D elastic yarn is Lygra elastic yarn. Although both domestic nylon twisted yarns and spandex yarns were used as elastic yarns, double-sided interlock knitting was performed, but the knitting loss ratio was higher than 30%, and the occurrence frequency of the knitting dough was high.

The knitting force of the supplied yarn was less than 2.5 gf to 3.5 gf, and there was less knitting defect. When the supplied yarn tension was less than 2.5 gf, the cutting caused by the shaking of the yarn supplied from the yarn feeding device occurred. Excessive cuts frequently resulted in increased process loss rates.

The dial side knitting angle refers to the angle of the yarn fed to the knitting needle with respect to the horizontal line connecting the position of the head of the knitting needle before the dial knitting needle is advanced by the advance cam when viewed from the side of the knitting machine. By adjusting the steep angle of the dial-side knitting needle may be adjusted so that the elastic yarn is knitted only on the skin surface to prevent the elastic yarn is supplied to the cylinder-side knitting needle.

The steep angle of the dial side knitting needle is 20 to 25 degrees, and the steep angle of the 55D elastic yarn is controlled in a larger 30 to 45 degree range so that the elastic yarn is knitted only on the skin surface.

In manufacturing a highly sensitive double-sided interlock circular knitted fabric in which elastic yarn is knitted only on the skin surface, the loop length of the surface may be 80 to 100 mm, the loop length of the skin surface may be 70 to 100 mm, and the loop length of the surface and the loop length of the skin surface may be The same or longer roof length should be designed to be larger than the skin length. Longer roof lengths result in less fabric density, resulting in looser and higher weight per unit area. By making the loop length of the surface larger than the skin surface, the surface is stretched more easily at the time of elongation and the elongation of the skin surface is less, so that the structure that can easily discharge sweat, moisture and heat generated from the skin surface to the outside is formed. do.

In the following Examples the present invention will be described in detail. The following examples illustrate non-limiting examples of the present invention.

By supplying nylon 40D / 34F combustible yarn and 55D elastic yarn according to Table 1 below, using a 30-inch / 42 gauge, 16 rpm, double-sided circular knitting machine (Sams Co., Ltd., SD-I4) with a weight of 310 to 330 g / yd as a double-sided interlock structure It is shown in Table 2 by measuring the physical properties of the knitting.

TABLE 1

TABLE 2

When 80% elongation is performed, the 25 mm wide sample is gripped at 100 mm gap, and the maximum stress is measured by pulling up to 80% of the gripping gap at a speed of 300 mm / min. Three samples of each of the wale and course directions of the double-sided interlock circular knitted fabric containing elastic yarns on the skin surface were prepared, and the average value of the maximum stresses was made as the stretching force, and the ratio of the wale stretching force to the stretching direction of the course direction was determined. Calculated.

Elongation recovery rate is stretched to 80% of the gripping interval at the same width, gripping interval, and tensile velocity as measured by the stretching force, and then returned to the same speed as the tensile velocity until the gripping interval reaches the original 100 mm. The recovery rate is calculated by the following equation using the residual strain (mm) after the third recovery from the extension recovery curve obtained by repeating this three times.

Elongation recovery rate (%) = [(80 mm-(residual deformation)) ÷ 80 mm] x 100

In the present embodiment, the wale-side stretching force of the double-sided interlock circular knitted fabric including elastic yarn only on the skin surface is in the range of 285 to 310 cN, the stretching direction in the course direction is 238 to 265 cN, and the fourth embodiment is 1.08, which has the smallest stretching ratio. The deviation of the stretching force is not large.

If the stretch force of the circular knitted fabric is too low, the adhesion to the body is lowered and the wear is bad, and if the stretch force is too large, it has a disadvantage of lowering the exercise ability of the user. Numerous wear tests have shown that an appropriate stretch range is in the 260-305 cN range.

The thickness and weight of the circular knitted fabrics are closely related to each other and have a significant influence on the feeling of wearing. If the weight is too heavy or too thick, it may interfere with the activity or feel stuffy, and the heat or moisture in the skin surface can be easily transferred to the outside. It cannot be discharged. Considering this point, the weight of the highly sensitive double-sided interlock circular knitted fabric in which elastic yarn is knitted only on the skin surface is 310 to 320 g / yd, and a thickness of 0.68 to 0.84 mm is appropriate.

The biodefective frequency counted the number of defects per roll (ROll) of 60 to 80yd in length, and the incidence of defects was significantly less in Example 4.

Claims (4)

40D / 34F nylon yarn and 55D elastic yarn are fed into the double-sided circular knitting machine with a dead force of 2.5 to 3.5 gf, the dial-side knitting angle is 20 to 25 degrees nylon, 30 to 45 degrees elastic yarn, and the draft ratio of the elastic yarn is 3.0 to 3.5 Conditionally knitting into a two-sided interlock tissue,
The double-sided interlock tissue is knitted only on the skin surface, and the loop length of 40D / 34F nylon of the surface of the double-sided interlock tissue is 80 to 100 mm, the loop length of the skin surface is 70 to 100 mm and the loop length of the surface is a loop of the skin surface. The same method as in the chapter, or the surface loop length is a method for producing a highly sensitive double-sided interlock circular knitted fabric, characterized in that larger than the loop length of the skin surface.
The method of claim 1,
Wherein said 40D / 34F nylon yarn is a tactel twisted yarn made of nylon 66 and said 55D elastic yarn is a lycra elastic yarn.
delete The method of claim 1,
The circular knitted fabric knit into the double-sided interlock tissue has a stretch ratio of 1.08 to 1.32, the thickness is 0.68 to 0.84mm, the method of manufacturing a highly sensitive double-sided interlock circular knitted fabric.