KR20050034264A - Polyester-based mixed textured yarn having shrinking property and a method for preparing the same - Google Patents

Abstract

The present invention relates to a polyester-based composite twisted yarn having excellent elasticity and a method for manufacturing the same, and more particularly, to a polyester-based latent stretchable composite yarn manufactured by a composite spinning technique of a two-component polyester. ), Using a partially oriented polyester microfiber of 0.2 to 0.7 denier as sheath yarn, and stretching at a draw ratio (D / R) of 1.0 to 1.3 at a combustion temperature of 150 to 210 ° C. The present invention relates to a method for producing a polyester-based stretchable composite twisted yarn and a stretchable composite twisted yarn manufactured by the method.

Polyester-based stretch composite twisted yarn according to the present invention is excellent in elasticity by the crimping rate, crimp recovery, and excellent in dyeing, the fabric containing the same, the high elasticity is expressed in the dyeing process, while the drape, repulsion, It has excellent dyeability and can produce a highly sensitive composite functional fabric.

Description

Polyester-based mixed textured yarn having shrinking property and a method for preparing the same}

The present invention relates to a polyester-based stretch composite twisted yarn and a method for producing the same. More specifically, the present invention is excellent in elasticity and elastic recovery, in particular, at the same time having a high elasticity during dyeing processing of the fabric comprising the same, the color (drape property), drape property (respe property), resilience elasticity And it relates to a polyester-based stretch composite twisted yarn that expresses a soft touch at the same time and a method for producing the same.

Conventional sheath-core composite composite twisted yarns use the difference in elongation of two polymers to induce the difference in the degree of flammability in the same flammable area, so that the low elongation yarns are the core filament yarn and high elongation yarns were made of sheath filament yarns of composite combustible yarns so that the sheath yarns had a structure surrounding the core yarns.

As the seed yarn, high-fiber fine-stretch polyester unstretched yarn or partially oriented yarn is used. As the core yarn, polyester tadenier filament yarn or highly shrinkable yarn is used. The drape and the resilience elasticity are expressed by the core denier.

Such a method for producing a polyester composite twisted yarn has been disclosed in Japanese Patent Application Laid-Open Nos. 7-126944, 8-16292 and the like. However, in terms of soft touch and bulkiness by the core yarn, Although it was satisfactory, the current situation is that it is not satisfactory in terms of the natural elasticity and dyeing which are commonly required in the field of recent suits and casual wear.

The present inventors have diligently tried to solve the problems of the prior art as mentioned above, using a polyester microfiber as a core yarn, and a polyester-based stretchable composite yarn as a seed yarn, polyester-based stretch composite twisted yarn In order to complete the present invention by confirming that the dyeing, drape and soft touch feeling is not only excellent, but also high elasticity is expressed in the spring structure of the polyester latent crimped composite yarn used as the core yarn. It came.

After all, the present invention is to provide a polyester-based stretch composite twisted yarn excellent in high elasticity, excellent dyeing, color development, drape, soft touch, bulkiness.

The present invention relates to a polyester-based composite twisted yarn having excellent elasticity and a method for manufacturing the same, and more particularly, using a polyester-based latent crimped composite yarn manufactured by a composite spinning technology of a two-component polyester as a core yarn, Using a partially oriented polyester microfiber of 0.2 to 0.7 denier as a seed yarn, at the same burning temperature of 150 to 190 ° C., at the same draw ratio (D / R) of 1.0 to 1.3, and simultaneously false-twisting, 2 The present invention relates to a method for producing a polyester-based stretchable composite twisted yarn characterized in that the car is set, and to a polyester-based stretched composite twisted yarn manufactured by such a method.

The latent crimped composite yarn is formed by spinning two kinds of polymers having different heat shrinkage properties in a side-by-side type or a sheath-core type structure. By applying heat in the process or stretching process, it is a fiber that gives high elasticity on the principle similar to spring by expressing a crimp in the shape of a coil physically by the difference of heat shrinkage characteristics.

In the stretchable composite twisted yarn according to the present invention, the PTT / PET latent stretchable composite yarn used as the core yarn is made of PET (polyethylene terephthalate, hereinafter PET) and PTT (polytrimethylene terephthalate, hereinafter PTT). It is composed of side-by-side composite yarn composed of two kinds of polymers, and partially oriented PET microfiber is used as the seed yarn.

Hereinafter, the present invention will be described in more detail.

1 is a schematic diagram of a composite combustion process to which the present invention is applied, wherein partially oriented PET microfibers (A) and PTT / PET latent crimp composite yarns (B) are supplied through a tube guide (1) in a separated state, respectively. It is supplied to the roller (2).

The thread thread passing through the supply roller 2 is intermixed in the air entanglement device 12, passes through the first heater 4 through the supply roller 3, and the cooling plate 5 and the combustor ( Through 6) is drawn between the feed rollers 7 at the same draw ratio and simultaneously flammable. At this time, as the combustor 6, in addition to the twist belt, any combustor such as spindle type or friction type can be used.

The stretched and burnt thread is heat-set in the second heater 8 and then lubricated by the oil ring roller 10 and then wound on the winder 11.

By stretching and simultaneously burning the core yarn of PTT / PET latent crimp composite yarn and the seed yarn of polyester microfiber partially oriented, the high-strength seed yarn acts as a surface effect yarn of the composite twisted yarn and the PTT / PET latent crimpability The composite yarn is configured as a core yarn to express elasticity. In particular, the PTT / PET latent crimped composite yarn used as the core yarn in the dyeing process of fabrics or knitted fabrics forms a spring-shaped crimp due to the difference in shrinkage characteristics of the dissimilar polymer. do.

In addition, PTT / PET latent crimped composite yarn used as the core yarn is a composite yarn of two polymers, PTT and PET, PTT can be expressed in a deep color at a temperature lower than 20 ℃ than PET, and the molecular structure is low PET Softer than Therefore, the PTT / PET latent crimped composite yarn used as the core yarn is more excellent in dyeing and softness than conventional PET monofilament yarn.

Therefore, the stretchable composite twisted yarn according to the present invention is more excellent in elasticity, softness, dyeing property and drape property.

Example

Hereinafter, the technical configuration and effect of the present invention will be described in more detail with specific examples and comparative examples, but these examples are only intended to more clearly understand the present invention and are intended to limit or limit the scope of the present invention. It is not.

First, the measuring method for measuring the characteristic of the stretchable composite twisted yarn which concerns on this invention is demonstrated in detail.

(1) Measurement of crimp elongation (%) and elastic recovery rate (%)

The fiber skein is immersed in boiling water for 30 minutes under no load, dried in a room temperature atmosphere, then loaded with 0.1 g / d for 2 minutes, unloaded and left for 10 minutes. The sample is left under a load of 0.002 g / d for 2 minutes, then the length L1 is measured, and an additional load of 0.1 g / d is added thereto, and then the length L2 is measured after 2 minutes. Subsequently, the load of 0.1 g / d is removed and the length L3 is measured after 2 minutes.

The crimp elongation (%) and elastic recovery rate (%) are calculated according to the following equations (1) and (2), respectively.

Crimp Elongation (%) = [(L2-L1) / L2] × 100

% Elastic recovery = [(L2-L3) / (L2-L1)] × 100

(2) Fabric elongation (%)

It measures based on JISL1096B method (static load method).

(3) elongation recovery rate (%)

It measures based on JISL1096B-1 (static load method).

(4) fabric appearance characteristics

Dyeing appearance, soft touch, and drape of the fabric were subjective panel evaluation, and the average of 30 points of total scores was evaluated for 30 people.

4 to 5 points: excellent

3 to 3.9 points: Good

2 to 2.9 points: somewhat less

2 points or less: Poor

(5) Workability: Number of trimmings during work

90% or more: Excellent

80% or more: good

70% or more: somewhat poor

Less than 70%: Poor

Example 1

Poly yarn having a composite yarn of two types of polymers, PTT and PET, and a polyester-based latent crimped composite yarn 75De having a single yarn fineness of 2 denier as the core yarn, and a partially oriented single yarn fineness of 0.6 denier as the seed yarn. In the same process as in FIG. 1 using an ester microburber was carried out a composite combustion process under the following conditions.

Fire speed: 350m / min.

Elongation Ratio: 1.04

Belt speed ratio: 1.620

Angle : 110

First heater temperature: 175

Second heater temperature: 160

Interlaced air pressure: 3kg / cm ²

2nd overfeed: 2.47

Third overfeed: 4.02

The elastic composite twisted yarn thus produced was twisted to 600TM, and then weaved into 5032 warp yarns, 102 warp densities, 72 weft densities and 2/2 twill, and other processing conditions. Fabrics were prepared according to the usual processing conditions.

Example 2

The fabric was prepared in the same manner as in Example 1 except that the single yarn fineness of the PTT / PET latent crimped composite yarn used as the core yarn was 4 denier.

Example 3

A fabric was prepared in the same manner as in Example 1 except that the single yarn fineness of the partially oriented polyester used as the core yarn was 0.7 denier.

Comparative Example 1

Fabrics were prepared in the same manner as in Example 1 except that the fibers used as the seed yarns were conventional polyester filament yarns.

Comparative Example 2

A fabric was produced in the same manner as in Example 1 except that the temperature of the first heater was set to 130 ° C. in the method of manufacturing a composite twisted yarn.

Comparative Example 3

A fabric was produced in the same manner as in Example 1 except that the temperature of the first heater was set to 220 ° C. in the method of manufacturing a composite twisted yarn.

The composite twisted yarn and the fabric woven using the composite twisted yarn were evaluated for crimping rate, crimping recovery rate, workability, elongation rate, elongation recovery rate, dyeing appearance, soft touch feeling, and the results are shown in Table 1. .

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Composite Combustor Crimp rate (%) 46 48 43 6 24 - Crimp recovery rate (%) 52 58 53 11 30 - (Flammable) workability Great Great Great Great Inadequate Inadequate Composite twisted fabric Elongation recovery rate (%) 33 29 31 18 28 - % Recovery 94 97 95 68 92 - Dyeing appearance Great Great Great Somewhat poor Good - Soft touch Great Great Great Somewhat poor Somewhat poor -

The composite yarn according to the present invention not only expresses a high degree of elasticity compared to the polyester-based composite twisted yarn of the prior art, but also has excellent dyeing property, soft touch, workability, and the like for the production of fabrics such as suits, casual wear, and sportswear. It can be widely used.

1 is a schematic diagram of a composite combustion process to which the present invention is applied.

Claims (5)

Polyester-based stretch composite twisted yarn characterized by using side-by-side type PTT / PET latent crimped composite yarn as the core yarn and PET microfiber partially oriented as the seed yarn. . The polyester-based stretchable composite twisted yarn according to claim 1, wherein the final single yarn fineness of the PTT / PET latent crimped composite yarn used as the core yarn is 2 to 4 denier. 2. The PET film of claim 1, wherein the final single yarn fineness of the PET microfibers used as the seed yarn is 0.2 to 0.7 denier, and the orientation is 30 × 10 ^-3 to 7 × 10 ^-3 , which is a partially oriented PET microfiber. Polyester elastic composite twisted yarn. The polyester-based stretchable composite twisted yarn according to claim 1, wherein the crimp elongation rate is 40% or more and the elastic recovery rate is 50% or more. Equation 1 [(L2-L1) / L1] × 100 Equation 2 [(L2-L3) / (L2-L1)] × 100 In Equations 1 and 2 above, L1 was immersed in the boiling water for 30 minutes in boiling water under no load, dried in room temperature atmosphere, then loaded with 0.1g / d for 2 minutes, unloaded and left for 10 minutes, 0.002g / is the length measured after applying a load of d for 2 minutes, L2 is the length measured 2 minutes after removing the load after measuring L1 and applying an additional 0.1 g / d load, L3 is the length measured after 2 minutes after removing the load after measuring L2, and further applying a load of 0.1 g / d. Using a side-by-side type PTT / PET latent crimped composite yarn as the core yarn and a PET microfiber partially oriented as the seed yarn, the two kinds of yarns were first entangled, and the combustion ratio was 150 to 210 ° C. , the draw ratio. A method for producing a polyester-based stretchable composite twisted yarn, which is stretched and burned under the conditions of 1.0 to 1.3.