KR100453180B1 - Manufacturing method of polyester false twist yarn - Google Patents

Abstract

The present invention relates to a method for producing a polyester processed yarn having excellent elasticity and soft touch, wherein two types of strands having single yarn fineness satisfying the following formulas (1) and (2) are circular or shaped single yarns A gentleman is used as a material yarn, one of which is twisted so that the number of softeners is 400 or more and less than 1500 per 1 cactus, and the other one is supplied without twisting and then spliced and heated. Next, a method for producing a polyester yarn, characterized in that in the same direction as the twisting direction of the twisted material yarn twisted yarn,

0.05de≤D1≤2.0de ‥‥‥‥ (1)

1.0de≤D2∠3.0de ‥‥‥‥ (2)

(However, D1 is a single yarn fine yarn of material without twist,

D2 is single yarn fineness of twisted material yarn.)

The polyester processed yarn of the present invention has a soft touch and excellent elasticity by forming a crimp by virtue of processing, and has an excellent wearing comfort when used as a garment.

Description

Manufacturing Method of Polyester Processed Yarn {Manufacturing method of polyester false twist yarn}

The present invention relates to a method for producing a polyester processed yarn having excellent elasticity and soft touch, and in particular, using a cross-sectional cross-section or at least two protrusions having at least two protrusions as a raw material yarn, and twisted yarns with twist (twist) Plywood two kinds of drawn yarns made of undrawn yarn and then twist it in the same direction as the twisting direction of the material yarn to form a crimp, resulting in a soft touch and excellent elasticity. It relates to a method for producing an ester processed yarn.

In general, the consumer's desire for clothing has increased interest in clothing materials having excellent comfort or functional functionality.

As a material for wearing comfort, the pursuit of touch, lightness and comfort is pursued at the same time. However, in the case of active sports clothes or casual clothes, elastic materials are preferred for obtaining a comfortable fit.

When a person is active, there are some differences depending on the movement, but the skin is increased by about 15% to 45%, and if the clothes worn at this time do not increase to the same level, the person feels uncomfortable. Polyester fiber has many excellent properties, but it has been pointed out that it has disadvantages such as shiny metallic luster, slippery touch, and lack of absorption ability, thereby bringing many limitations on the use.

Many studies have been conducted to improve such problems and wearability. Particularly, in order to improve the feel, a release cross-section yarn, a microfiber yarn or a microfiber yarn has been developed, and improvement of the lightness and thermal insulation of fabrics using hollow fiber has been attempted.

In addition, many studies have been conducted to develop a fabric having elastic properties. In general, a method of imparting elasticity to the fabric is a method of combining elastic yarn with natural or artificial fibers and elasticity of the artificial fiber itself. It can be divided largely into a method of giving. In the former case, a spun yarn is used as a spun yarn to give elasticity to the fabric by making composite yarn through processing process such as natural fiber or artificial fiber, air entanglement, bonding or covering. This defect reduces elasticity in the machining process, leading to more defects, and due to the characteristics of the yarn,

In the preparation process, a dedicated warping machine should be used, and since the price of spantex is high, there is a problem of increasing the cost of the product.

In the latter case, the method of imparting elasticity to the artificial fiber itself can be broadly divided into a method of improving or modifying a polymer as a raw material, a method of using a two-component polymer in yarn production, and a method by post-processing. As a method of modifying the polymer, there is a method of using a material capable of increasing the amorphous region in the raw material of the polymer, and representative examples thereof include polybutylene terephthalate fiber and polytrimethylene terephthalate fiber. All of these fibers are poor in workability and quality due to the thermal properties of the polymer, and the production and quality of the yarns using existing equipment are needed. Polytrimethylene terephthalate fibers are used as raw materials because all of them depend on imports. There is a limit to the development of the application because the supply line of is limited and the raw material cost is very expensive. In the production of yarns, a method of using a polymer of two components is usually called "composite spinning", and the manufacturing method is a method of spinning a polymer having the same component with only different physical properties, for example, using a general polyester and having an intrinsic viscosity Is a method of complex spinning of a polymer having a value of 0.660 and a polymer of 0.60 or less and a method of complex spinning using a general polymer and a modified polymer.

Since the complex spinning method uses heterogeneous polymers, a dedicated facility is needed, and there is a closed end to increase the manufacturing cost due to an increase in the initial investment cost, and because the quality of the heterogeneous polymer is very large, there are many defects in the final product. there is a problem. As a post-processing method, there is generally known a method of compressing a yarn to form a crimp on the yarn to have elasticity. The provision of elasticity by flammable processing can be manufactured by using a conventional combustor, and there is an advantage that the raw material can be selectively used. However, when twisting the processed yarn to improve the feel of the fabric, the elasticity is lost or Or there is a problem that the elasticity falls.

The present invention can selectively use two kinds of polyester drawn yarns manufactured using existing general polyester raw materials and spinning equipment, and give the elasticity by forming a crimp through the flammable processing, and the problem of the existing method The technical problem of twisting the processed yarn is to completely solve the problem of inferior elasticity or loss, and to remarkably improve the feel and elasticity of the fabric or knitted fabric using the processed yarn, and to improve the functionality such as absorbency and quick drying.

1 is a process schematic diagram showing an example of a processing step used for manufacturing the processed yarn of the present invention;

2 is a process schematic diagram showing an example of a processing step conventionally used for manufacturing a processed yarn.

<Explanation of main parts of symbols in drawings>

1: Two for one spindle 2: Material yarn 1 (Supply pirn)

3: Material Yarn 2 (Supply cake) 4: Tensor

5: Heater 7: Cheese

6: False twist spindle

The present invention is a material yarn with twist and a material yarn without twist, using two kinds of polyester drawn yarns having different single yarn fineness, improving the processing method, and having excellent elasticity and soft touch. The present invention relates to a method for manufacturing a processed yarn having a polyester yarn, comprising a process of twisting after weaving using a circular cross-section or a non-sectional cross-section yarn having at least two protrusions as a raw material yarn in the present invention. A processing yarn was manufactured using a processing process facility such as the above.

Material yarns can be manufactured either in the form of two ply yarns using the same yarn or in the method of two ply yarns using different yarns, and the two kinds of yarns used are selected to satisfy the following equation.

0.05de≤D1≤2.0de ‥‥‥‥‥‥‥ (1)

1.0de≤D2∠3.0de ‥‥‥‥‥‥‥‥ (2)

Where D1: single yarn fineness of material yarn without twist (de / f)

D2: Single yarn fineness (de / f) of twisted material yarn.

In the case of using the island-in-the-sea yarn or the divided yarn as the material yarn (D1) without twisting, it means the single yarn fineness after melting or splitting. When D2 is less than 1.0 in Equation (2), the touch is soft, but the elasticity property is poor, If the D2 value is 3.0 or more, a problem arises that the touch is poor. Using the equipment of Figure 1 to give a twist of the raw material yarn was set to give more than 400 to less than 1500 per meter. In general, the spindle rotation speed can be set to a maximum of 15,000 rpm due to the characteristics of the conventional two for one twister (Two for one Twister), but preferably 12,000 rpm or less. At this time, the twist given to the yarn 1

If it is less than 400, the elasticity of the yarn is insufficient, and if it is more than 1,500, the elasticity is excellent, but there is a closed edge in which the surface is rough in a woven or knitted state.

Therefore, the twist of the yarn is better than 400 to less than 1500 levels, but more preferably 600 to less than 1200 is good. Material yarns with less than 1 denier of single yarn fineness without twisting were adjusted to have a uniform tension by installing a tensioning device before weaving in order to maintain the same tension with the twisted material yarn. At this time, if the yarn tension is uneven, the flammable state is poor, and workability is inferior. After braiding the twisted material yarn D2 and the untwisted material yarn D1, the heat required for the combustion is heated by the heater 3 in FIG. 1. The temperature of the heater was set to satisfy the following equation in consideration of the type of yarn, dyeing, and elasticity.

150 ℃ ≤ Ht ≤ 210 ℃ ........... (3)

Where Ht: heater temperature (℃)

At this time, when the temperature (Ht) of the heater is 150 ° C or less, the crimping property, that is, the elasticity is inferior, and when it is 210 ° C or more, the elasticity is improved, but there is a problem in that defects such as rain and contamination due to single cutting are increased. In case of using a general polyester, the heater temperature is most suitably in the range of 180 ° C to 200 ° C.

Yarns that are given the heat necessary for combustion are combusted by the combustor.

Typically, the combustor is divided into a pin type, a disk type and a belt type, and the pin type is used in the present invention.

The direction of flammability was in the same direction as the direction of twisting. In case of twisting in the direction opposite to the direction of twisting, the surface is soft and bulky in fabric or knitted fabric, but it is elastic Poor problem occurs.

The twist number at the time of flammability was set so that the following formula might be satisfied.

Tn = 28,000 / (De) ^1/2 ± 200 ........... (4)

Where Tn is the number of twists (T / M)

De: stands for Denier.

When the twist number is 28,000 / (De) ¹ /2-200, the elasticity is relatively insufficient and the elasticity is decreased. When the twist number is 28,000 / (De) ^1/2 + 200, the defect tends to increase. Therefore, preferably Tn = 28,000 / (De) ^1/2 ± 100 level is good.

The coiling tension of the combustible yarn was 0.08 to 0.2g per denier, and the preferred level is 0.1g.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Example

The value obtained in the Example was measured with the following method.

1) Fineness, strength and elongation were measured by JIS L1013 method.

2) Elasticity (%) =

Ⓛ Dissolve about 500m of outer part of the sample using Yarn Reel.

② Enter the regulation of the sample and make skein.

Sample specification length (m) = 20.5 ÷ (0.0016 x sample fineness x 2)

③ Remove the sample from the Yarn Reel, hang it on a hanger, add 20.5 g of the sample, and leave it at room temperature for 10 minutes before measuring the sample length. (L1)

④ Hang the sample on a hanger and heat-process in a water bath at 82 ± 2 ℃ for 10 minutes.

⑤ Remove the water by removing the sample from the water tank and measure the length. (L2)

3) Feel is evaluated by the criteria described below.

-◎: Very soft touch

-○: Soft touch

-△: a little rough feeling.

-×: Very rough texture

Example 1

75de / 36f, a circular cross-section yarn imparted with twist of 1200T / M with polyester stretched yarn, and 75de / 36f, a circular cross-section without twist, are heat-treated at 190 ℃ in a heater, and burned at 45,724 rpm, and then burned at 19m / min. Was wound up at speed.

The strength and elongation of the used material yarn was 4.9 g / de and 28%, and the physical properties of the processed yarn are shown in Table 1.

Example 2

After blending 75de / 36f, a triangular cross section yarn with twist of 1200T / M, and 75de / 72f, a non-twist circle section, heat-treated at 190 ℃ with a heater and burning it at 45,724rpm. , Was wound up at a speed of 19 m / min.

The strength and elongation of triangular yarn 75de / 36f was 4.5g / de and 35.4%, respectively, and the strength and elongation of 75de / 72f was 4.9g / de and 28%. The physical properties of the processed yarns are shown in Table 1.

Example 3

After blending 75de / 36f with four protrusions with twisted polyester polyester yarns of 1200T / M and 75de / 144f without round twist, heat treatment at 190 ℃ with a heater and burning them at 45,724 rpm. It wound up at the speed of 19 m / min. The strength and elongation of 75de / 144f were 4.5g / de and 29.0%, respectively, and the strength and elongation of 75de / 36f of hetero yarns were 4.8g / de and 27%. The physical properties of the processed yarns are shown in Table 1.

Comparative Example 1

Polyester twisted yarns, 150de / 72f of four-sided end yarns with four protrusions, were twisted to 600T / M, heat-treated at 190 ℃ with a heater, and twisted at a spindle speed of 91,448rpm. Wound up at speed. The strength and elongation of the used yarn were 4.8 g / de and 27%, and the physical properties of the processed yarn are shown in Table 1.

Comparative Example 2

It was polyester drawn yarn, circular section yarn 150de / 96f as a raw material yarn, twisted 800T / M, heat treated at 190 ℃ in a heater, and burned at a speed of 26m / min after burning at a spindle speed of 68,586rpm. The strength and elongation of the used yarn were 4.4g / de and 31%, and the physical properties of the processed yarn are shown in Table 1.

Comparative Example 3

Polyester drawn yarn, 150de / 72f, cross-section yarn with four protrusions, is used as a material yarn, heated at 190 ℃ in a 1st heater, stretched 1.02 times, and the angle of the flammable belt is set at 105 ° to 450m / min. It was flammable. The physical properties of the processed yarn are shown in Table 1.

Table 1

D1: Material yarn without twist

D2: twisted material yarn

The present invention provides a method for manufacturing a processed yarn that can freely give a soft touch and elasticity to a fabric or knit fabric by using two kinds of polyester drawn yarns, and in particular, the conventional twisted yarn in the post-processing method If you give, it will have a significant effect of completely improving the problem of inferior elasticity or loss, and improve the overall functionality, such as the feel and absorbency and quick-drying of the fabric or knitted fabric using the processed yarn.

Claims (4)

In manufacturing a stretched yarn by twisting polyester stretched yarn, Two kinds of stretched yarns having single yarn fineness satisfying the following formulas (1) and (2) are used as material yarns, and one of the material yarns has a softening life of 400 or more and less than 1500 per 1 cactus. Twist, the other one is supplied without twisting and then spliced, and then heated and then combusted in the same direction as the twisting direction of the twisted yarn of the twisted material yarns manufacturing Way. 0.05de≤D1≤2.0de ‥‥‥‥ (1) 1.0de≤D2∠3.0de ‥‥‥‥ (2) In the above formula, D1 is the single yarn fineness of the twisted material yarn, D2 is single yarn fineness of twisted material yarn. The method according to claim 1, in order to supply the necessary heat before the burning step Method for producing a polyester yarn, characterized in that for heating the plywood to a temperature satisfying the following equation (3). 150 ℃ ≤ Ht ≤ 210 ℃ ‥‥‥ (3) However, in formula (3), Ht is the set temperature of the heater. The method according to claim 1, wherein the number of twists in the combustion process is set to satisfy the following equation (4). Tn = 280,000 / (De) ^1/2 ± 200 ‥‥ (4) However, in formula (4), Tn is the twist number (T / M), De is the islander. The manufacturing method of the polyester processed yarn of Claim 1 which processes a twisting process and a flamming process in a single process.