KR960012821B1 - Preparing process for complex drawing textured yarn having impressing hemp - Google Patents

Abstract

The polyester finished yarn is made by pre-untwisting yarn obtained from partially oriented polyester yarn(POY). The pre-untwisting yarn has a filament fineness of grey yarn in the range of 1.6= d.p.f= 3.4 and a draw ratio of 1.250= D/R= 1.450, which is passed through the first heater at 220-247 deg.C and second heater at 190-230 deg.C to give the finished yarn. The finished yarn has a good shari feeling.

Description

Manufacturing method of polyester movable yarn with hemp texture

1 is a manufacturing process drawing of the processed yarn of the present invention.

The present invention relates to a processing yarn manufacturing technology having characteristics similar to hemp, and is a polyester processing yarn manufacturing method for producing unsealed yarns by lowering the tensile strength of polyester semi-stretched yarns during (POY) combustion. In this way, the manufacture of knitted fabrics gives the horse a characteristic shari texture and unique luster.

Various processing methods have been developed to give the synthetic fiber aesthetic appearance and texture similar to that of natural fiber. Especially, hemp is characterized by its excellent gloss and appearance, and its unique rough texture. There are many processing techniques for imparting characteristics. (Japanese Patent Office 59-94639, East 57-29628, East 54-27040).

This conventional technique is to give two or one kinds of drawn yarns (or semi-drawn yarns) to give a rough feeling by composite fusion or single yarn fusion combustion, and due to the manufacturing conditions, the yarn speed is low, the productivity is low, and the residual torque is large, resulting in post-processability. The disadvantage is that it is very bad.

An object of the present invention is to solve the above problems, it is characterized in that it provides a method for producing a processed yarn having the appearance and texture of hemp by improving productivity by setting the appropriate manufacturing conditions and post-processability by removing residual torque. .

That is, in the present invention, in the manufacture of general polyester semi-drawn yarn (POY) by unsealed yarn, the single yarn fineness of the yarn is 1.6 dpf The range is 3.4, and the draw ratio is 1.250 by passing the primary and secondary heaters in the manufacturing of the processing yarn. D / R The texture of the hemp to obtain unsealed twisted yarn in the range of 1.450 is a method for producing polyester processed yarn.

In other words, the present invention, unlike the general false twisted yarn manufacturing process by lowering the decompression tension intentionally made unsealed areas and fusion by heat treatment in the primary heater, the residual torque of the processed yarn by heat setting in the secondary heater The minimum is to manufacture a processed yarn.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a process schematic diagram for carrying out the method of the present invention, in which yarn (A) is fed through a feed roller (1) to a variable unit. The yarn used is a general polyester semi-stretched yarn with a spinning speed of 2800 ~ 3200m / min, strength of 2.5 ~ 3.0g / d, elongation of 90 ~ 140%, and shrinkage ratio of 45 ~ 70%.

In addition, the single yarn fineness (d.p.f), which greatly affects the quality of unsealed yarn, is appropriate at 1.6 ~ 3.4 level. When the single yarn fineness exceeds 3.4, the fusion effect by the primary heater (B) is usually lowered. Therefore, the temperature must be excessively increased. When the single yarn fineness is less than 1.6, the workability is poor and the physical properties of the processed yarn are too weak, resulting in poor post-processability. .

Yarn A to be supplied in the present invention is stretched and smoked between the feed roller (1) (2) and heat-set between the feed roller (2) (3), explaining the important conditions of each element as follows.

The draw ratio between the feed rollers (1) and (2) is 1.250 D / R It should be about 1.450 to manufacture good quality unsealed yarn, which is 20 ~ 90% of the general drawer's drawing ratio. Obtained.

In the combustible area, the temperature of the primary heater (B) is good in the range of 220 to 247 ° C. If the temperature of the primary heater B is less than 220 ° C, the degree of fusion of the processed yarn due to the heat treatment of the heater is insufficient, so that the target texture cannot be obtained. Product deterioration). If it exceeds 247 ℃, it may cause the weakness of object due to excessive heat treatment, deterioration of workability, and equipment failure.

In addition, _{non-(K = T 2 / T 1} ) is 0.15 haeyeon of tension (T ₂₎ and a false twist tension (T ₁₎ K 0.55 is appropriate. (At the time of general stretching flaming process 0.7 K 1.1 range), that is, lowering the tension extension intentionally creating unburned areas. If you lower the extension tension too much (K 0.15), workability is remarkably degraded due to the shivering phenomenon only after the flammable unit. To set the K value (= T ₂ / R ₁ ) within the above range, adjust the twist type to the twist number (θ) and V _B / V _y (linear speed / spin speed of the twist belt) for the belt type. (θ) is lower than the normal draw value for each denier, that is, 75% θ / θ ₀ The 95% range is appropriate (θ ₀ : twist in normal processes).

Since the unburned yarn has a large residual torque and thus lowers post-processability, the present invention heat-sets the secondary heater D to remove the residual torque, and the secondary heater temperature is appropriately in the range of 190 to 230 ° C. It is difficult to remove the residual torque because the heat correction effect is less than 190 ℃, and the processed yarn properties are weak due to the damage caused by high heat treatment above 230 ℃.

Processed yarns, wovens, and knitted fabrics produced by the present invention have a unique luster and touch, similar to natural hemp, and are used for women's clothing.

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

Example 1

General polyester semi-stretched yarn (POY) 130 ^d / 72 ^f (spinning speed = 3200m / min) as a yarn through the 1.2 heater in a belt type combustor was produced in the following process by the following process.

480 m / min, elongation ratio 1.400, primary heater 235 ° C, secondary heater 200 ° C K value 0.3, flammable belt linear speed / dead velocity (V _B V _y ) 0.682

Feed roller (1) speed 342 m / min.

Feed roller (3) Speed 462 m / min.

Take-up roller (4) Speed 471 m / min.

After weaving the processed yarn (inclined density = 140 minutes / in, weft density = 65 minutes / in, plain weave) was dyed under normal polyether fabric processing conditions.

Example 2

General polyester semi-stretched yarn (POY) 80 ^d / 36 ^f (spinning speed = 3000 m / min) was used as the yarn in the same manner as in the process of Example 1, after weaving, weaving and processing. (Bevel density is 152 / in, weft density 70 / in, plain weave)

Example 3

Only the following conditions were changed with the yarn of Example 1, and the remainder was made into the same conditions, and then weaved and processed after manufacture of the processed yarn.

The draw ratio is 1.372, primary heater 230 ° C, secondary heater 210 ° C, K value 0.42, flammable belt linear speed / firing speed (V _B V _y ) 1.720

Comparative Example 1

General polyester semi-stretched yarn (POY) 250 ^d / 48 ^f (spinning speed = 3000 m / min) as a yarn and proceeded in the same manner as in Example 1.

Comparative Example 2

The yarn of Example 1 was used to advance to the following process.

The conditions other than draw ratio 1.580, the primary heater 200 degreeC, and the secondary heater 170 degreeC K-value 0.8 advanced like Example 2.

Comparative Example 3

The yarn of Example 2 was used to progress to the following process.

The conditions other than draw ratio 1.325, the primary heater 230 degreeC, and the secondary heater 180 degreeC K value 0.3 advanced like Example 2.

Test results of the fabric prepared in Examples, 1, 2, 3 and Comparative Examples 1, 2, 3 are as follows.

Claims (3)

In the manufacture of ordinary polyester semi-drawn yarn (POY) with unsealed yarn, the single yarn fineness of the yarn is 1.6 dpf The range is 3.4, and the draw ratio is 1.250 by passing the primary and secondary heaters during the manufacturing of the processing yarn. D / R A process for producing polyester processed yarn in which the texture of hemp to obtain unsealed twisted yarn in the range of 1.450. The method of claim 1, wherein the temperature of the primary heater is in the range of 220 ~ 247 ° C, the temperature of the secondary heater is 190 ~ 230 ° C. The method according to claim 1, wherein the ratio of the decompression tension and the flammability is (K = T ₂ / T ₁ ) 0.15 K In the range of 0.55, with a twist of 75% more than in the normal draw θ / θ ₀ A method for producing a polyester processed yarn having a hemp texture by the unsealed twisted yarn manufacturing in the 95% range. (Where θ is the number of twists of the present invention, θ ₀ is the number of twists of a general process)