KR20120136549A - Fabric made of yarns having different characteristic and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A fabric containing first and second yarns is provided to ensure light weight, soft texture, and excellent exterior. CONSTITUTION: A fabric contains first and second yarns with different characteristic. The first yarn is formed of an acetate yarn. The second yarn is formed of a polyester-partially drawn yarn with repetitive drawn yarn and undrawn yarn.

Description

Fabric made of different kinds of yarns and its manufacturing method {Fabric made of yarns having different characteristic and Method for manufacturing the same}

The present invention relates to a fabric consisting of different kinds of yarns, and more particularly to a fabric comprising a polyester.

Polyester fibers can be produced through the process of condensation polymerization of ethylene glycol and terephthalic acid to obtain a polymer and spinning the polymer, and has been widely used for clothing because it is relatively easy to produce, inexpensive, and has excellent physical properties.

However, polyester fibers have a specific gravity of about 1.38, which is relatively high compared to other synthetic fibers such as nylon, and thus, fabrics prepared therefrom have a shortcoming in light weight.

In addition, polyester fibers manufactured by fully stretching are well developed in orientation crystallization, high strength and modulus of elasticity, and thus, fabrics prepared therefrom have a hard touch and lack of parts.

In addition, the polyester fiber produced by stretching completely has a disadvantage that the fabric produced therefrom is difficult to obtain a luxurious appearance.

The present invention has been devised to solve the above disadvantages, the present invention is to produce a fabric by using a polyester fiber and a different type of yarn different from that, thereby providing a fabric having excellent characteristics such as light weight, feel, and appearance It aims to provide.

The present invention comprises a first yarn and a second yarn different from each other in order to achieve the above object, the first yarn is made of acetate yarn, the second yarn is repeated stretching and non-stretching portion It provides a fabric comprising a polyester partially drawn yarn.

The present invention also provides a process for preparing a first yarn made of acetate yarns and a second yarn made of polyester partially drawn yarns in which the stretched portion and the non-stretched portion are repeated; Manufacturing dough using the first yarn and the second yarn; Refining the dough to produce refined paper; Dyeing the refined paper to produce dyed paper; And it provides a fabric manufacturing method comprising the step of heat-treating the dyed paper.

According to the present invention, by manufacturing the fabric using the first yarn and the second yarn having different thermal contraction rate, the resulting fabric forms a multi-layered cross-sectional structure, and excellent properties such as light weight, feel, and appearance.

Hereinafter, preferred embodiments of the present invention will be described in detail.

As used herein, the term 'fabric' includes a dough obtained by knitting or weaving a yarn, and a processed paper obtained by performing a process such as refining and dyeing on the dough, and includes tissues and fabrics. . Hereinafter, the knitting is mainly described as an example, but the present invention is not necessarily limited to the knitting.

The fabric according to an embodiment of the present invention includes a first yarn and a second yarn having different characteristics from each other.

The first yarn is made of acetate yarn, and the second yarn is made of polyester partially drawn yarn in which the stretched portion and the non-stretched portion are repeated.

Such fabrics composed of the first yarn and the second yarn having different characteristics from each other may be formed to have a multilayer cross-sectional structure.

That is, since the first yarn has a relatively low heat shrinkage rate and the second yarn has a relatively high heat shrinkage rate, the first yarn and the second yarn having different heat shrinkage rates are different from each other. When manufacturing, the first yarn and the second yarn are shrunk at different ratios during the manufacturing process to obtain a voluminous fabric having a multi-sectional cross-sectional structure.

More specifically, the second yarn having a large thermal contraction rate shrinks a lot during the manufacturing process, and its length decreases relatively much, forming a central layer, and the first yarn having a small thermal contraction rate shrinks a little during the manufacturing process. As the length is reduced relatively, the upper and lower layers of the center layer are formed in a loop structure.

Here, the term "thermal shrinkage rate" is obtained by measuring the length of the shrinked yarn after immersion after immersing the yarn in hot water heated to 100 ° C. until the yarn no longer shrinks. It can be measured by the method L 1037-5-12.

Each of the first yarn and the second yarn having such characteristics will be described in more detail below.

Acetate yarn constituting the first yarn may use a rayon fiber known in the art. However, the acetate yarn is preferably such that the heat shrinkage is in the range of 1% to 5%.

If the heat shrinkage rate of acetate yarn is less than 1%, the shrinkage rate is too small, which may damage the yarn during the fabric manufacturing process. This is because the desired fabric properties may not be obtained.

Polyester partial stretched yarn in which the stretched portion and the non-stretched portion constituting the second yarn are repeated can be obtained through the following process.

First, a predetermined copolymer is copolymerized to prepare a polyester copolymer. For example, a polyethylene terephthalate polymer can be prepared by dehydrating a ethylene glycol and terephthalic acid. Next, a polymer chip is manufactured using the polyester copolymer, the polymer chip is melted to form a spinning solution, the spinning solution is spun through a predetermined mold, and the stretching and non-stretching of the spinning material are repeated. Ester partially drawn yarns can be prepared.

The stretched portion of the radiate becomes thin in thickness and crystallization is made, whereas the non-stretched portion of the radiate becomes thick in thickness and no crystallization occurs. Such polyester partially drawn yarn may be made of TTD polyester which is a kind of TTY (Thick and Thin Yarn). The length of the repeating unit in which the stretching and non-stretching are repeated may be set in a range of about 0.5 cm to 1.5 cm, but is not necessarily limited thereto.

As described above, the present invention uses a polyester partial stretched yarn in which a thick portion and a thin portion are repeated as the second yarn, so that the fabric has a unique surface feel.

Since the polyester partially drawn yarn includes the non-stretched portion having a thick thickness and no crystal orientation, the heat shrinkage ratio is relatively higher than that of the first yarn.

Specifically, the heat shrinkage ratio of the polyester partially drawn yarn constituting the second yarn is preferably 16% to 45%.

If the thermal contraction rate of the polyester partially drawn yarn constituting the second yarn is less than 16%, the difference in thermal contraction rate between the first yarn and the second yarn may be insignificant, and thus the multi-layered cross-sectional structure may not be achieved. This is because the difference in heat shrinkage between the first yarn and the second yarn is so large that the first yarn may be damaged if the heat shrinkage ratio of the polyester partially drawn yarn constituting the polyester yarn exceeds 45%.

In the raw material containing such a 1st yarn and a 2nd yarn, it is preferable that content of the said 1st yarn and a 2nd yarn satisfy | fills following formula (1).

Equation 1

32% ≤ P (P + T) × 100 ≤ 68%

In Equation 1, P means total weight of acetate yarn which is the first yarn, and T means total weight of polyester partially stretched yarn which is the second yarn.

If, in Equation 1, the value of "P (P + T) x 100" is less than 32%, there is a fear that the first yarn and the acetate yarn, which is the first yarn, may be damaged due to the difference in shrinkage between the first yarn and the second yarn. It may be difficult to express the characteristics of the acetate yarn yarn, and, in Equation 1, when the value of "P (P + T) x 100" exceeds 68%, the shrinkage resistance of the first yarn is increased so that the polyester portion is the second yarn. Expression of stretched yarn can be difficult.

The fabric consisting of such a first yarn and a second yarn may be made of a knitted fabric, for example, a double tissue knit fabric.

When the fabric is made of a knitted fabric, it is preferable that the loop length L of each of the first yarn and the second yarn constituting the knitted fabric satisfies Equation 2 below.

Equation 2

14.3cm ≤ L ≤ 25.0cm

The loop length (L) generally refers to the length of 51 nose reference yarn in knitting.

If the loop length L is less than 14.3 cm, the spacing between the yarns is so narrow that even if the second yarn has a suitable heat shrinkage characteristic (ie, a heat shrinkage characteristic ranging from 16% to 45%), Shrinkage may not be made smoothly, and if the loop length (L) exceeds 25.0 cm, the unique appearance effect may be increased, but the elasticity of the fabric is weak and the thickness of the fabric becomes thin. Product value may drop, such as transparent.

In order to obtain a knitted fabric having such a loop length (L) range, it is necessary to properly adjust the knitting machine gauge (G). Specifically, the knitting machine gauge G preferably satisfies the following expression (3).

Equation 3

14 ≤ G ≤ 24

The gauge G generally refers to the number of knitting machine needles per inch.

If the gauge (G) is less than 14, the distance between the needles is too wide so that the loop length (L) may exceed 25.0 cm. Accordingly, the elasticity of the fabric is weak and the thickness of the fabric is thin to make the fabric transparent. The value of the product may be lowered, such as the display.

When the gauge G exceeds 24, the spacing between the needles is so narrow that the loop length L may be less than 14.3 cm, so that the second yarn may have suitable heat shrinkage characteristics (i.e., Even if they have a heat shrinkage characteristic in the range of 16% to 45%, such shrinkage may not be performed smoothly.

Such a knitted fabric according to the present invention is a step of producing dough using a first yarn made of the acetate yarn and a second yarn made of a polyester partially drawn yarn in which the stretched portion and the non-stretched portion are repeated, and the process of post-processing the dough It can be prepared through.

The process of manufacturing the dough may include a step of knitting the first yarn and the second yarn using a knitting machine known in the art, wherein the knitting machine gauge (G) satisfies the above Equation 3 It is preferable to set so that.

The post-processing step is to refine the dough in an aqueous solution of the refiner to make refined paper, to dye the refined paper to make dyed paper, and to improve thermal stability of the dyed paper by using a tenter machine to spread wrinkles. It may include a heat treatment process.

The refining process may be carried out using a jigger refining machine, etc., may be made of a step of immersing the dough in the aqueous solution of the refining agent of 60 ℃ or more containing sodium carbonate and a surfactant. The refining process is carried out in a high temperature aqueous solution, the shape of the multi-layered structure of the knit can be determined according to the temperature given. That is, as the refining temperature is increased, the shrinkage rate is increased, so that the difference in length between the first yarn and the second yarn may be greater.

On the other hand, after the refining process, the weight loss process may be further performed using an alkaline aqueous solution. Through such a weight reduction process, the feel and drape of the knitted fabric are improved.

The dyeing process may be performed at a high pressure and a temperature of 100 ° C. or more using a high pressure Zieger dyeing machine or a rapid dyeing machine. The dye used in the dyeing process uses a disperse dye, which is a dye commonly used for dyeing polyester fibers. On the other hand, according to the dyeing temperature and the temperature increase rate, since the dye adsorption rate of the yarn is changed, it is possible to manufacture a knitted fabric of various colors by adjusting the dyeing temperature and the temperature increase rate.

The heat treatment process may be performed using a pin type tenter device. The heat treatment process may be carried out at a temperature of 130 ℃ or more, thereby improving the shape stability of the knitted fabric. On the other hand, prior to the heat treatment step may be performed a pharmaceutical treatment step of immersing the dyed paper in a composition containing a variety of post-processing agents, such as a softener, antistatic agent, water repellent.

Hereinafter, specific examples and comparative examples of the present invention will be described.

Example  One

After dissolving the polyethylene terephthalate polymer chip at a temperature of 290 ℃ to prepare a spinning solution, after spinning the spinning solution through a detention and repeated stretching and non-stretching at a draw ratio of three times to prepare a polyester partially stretched yarn of 110 denier It was.

Dough was prepared by knitting a polyester partially drawn yarn and 120 denier acetate yarn of Mitsubishi Textile Co., Ltd., Japan, using a knitting machine. At this time, the loop length was 19.5 cm and the knitting machine gauge was 16.

After performing the refining process for 20 minutes at the temperature of 80 ℃ in the paper dough refiner, using a rapid high pressure dyeing machine and using a disperse dye as a dye for 60 minutes at 130 ℃ and then ten By carrying out the heat treatment process at 160 ° C. using a tug, a knitted fabric having a width of 60 inches and a weight of 230 g / yd was finally obtained.

Example  2

In Example 1 described above, except that the process was performed using a 75 denier acetate yarn, the loop length is 21 cm, the knitting machine gauge is 22, by the same method as in Example 1 Knitting was prepared.

Comparative example

After dissolving the polyethylene terephthalate polymer chip at a temperature of 290 ℃ to prepare a spinning solution, the spinning solution was spun through a spinner and stretched at a draw ratio of three times to prepare a 100 denier polyester filament yarn.

The prepared polyester filament yarn was knitted using a knitting machine to prepare dough. At this time, the loop length was 19.5 cm and the knitting machine gauge was 16.

After performing the refining process for 20 minutes at the temperature of 80 ℃ in the paper dough refiner, using a rapid high pressure dyeing machine and using a disperse dye as a dye for 60 minutes at 130 ℃ and then ten By carrying out the heat treatment process at 160 ° C. using a tug, a knitted fabric having a width of 60 inches and a weight of 230 g / yd was finally obtained.

As a result of the external inspection, the knitted fabric according to Example 1 and Example 2 was made of a cross-sectional structure of a multi-layer, it was confirmed that the knitted fabric according to the comparative example is made of a single-layered cross-sectional structure.

Claims (8)

It comprises a first yarn and a second yarn different from each other,
And the first yarn is made of acetate yarn, and the second yarn is made of polyester partially drawn yarn in which the stretched portion and the non-stretched portion are repeated. The method of claim 1,
The total weight (P) of the acetate yarns and the total weight (T) of the polyester partially drawn yarns are represented by the following formula 1:
Equation 1
32 ≤ P (P + T) × 100 ≤ 68
Fabric characterized in that to satisfy. The method of claim 1,
The heat shrinkage rate of the acetate yarn is 1% to 5%, the heat shrinkage of the polyester partially drawn yarn is 16% to 45%. The method of claim 1,
The fabric is made of a knit,
The loop length (L) of the knitted fabric is represented by the following equation 2:
Equation 2
14.3cm ≤ L ≤ 25.0cm
Fabric characterized in that to satisfy. Preparing a first yarn made of acetate yarn and a second yarn made of polyester partially drawn yarn in which the stretched portion and the non-stretched portion are repeated;
Manufacturing dough using the first yarn and the second yarn;
Refining the dough to produce refined paper;
Dyeing the refined paper to produce dyed paper; And
The method of manufacturing a fabric comprising the step of heat-treating the dyed paper. The method of claim 5,
The total weight (P) of the acetate yarns and the total weight (T) of the polyester partially drawn yarns are represented by the following formula 1:
Equation 1
32 ≤ P (P + T) × 100 ≤ 68
Fabric manufacturing method characterized in that to satisfy. The method of claim 5,
The thermal contraction rate of the acetate yarn is 1% to 5%, the thermal contraction rate of the polyester partially drawn yarn is 16% to 45%. The method of claim 5,
The process for producing the dough is the following formula 3:
Equation 3
14 ≤ G ≤ 24
Method of producing a fabric, characterized in that the process consisting of the step of performing the knitting in the knitting machine gauge (G) range represented by.