KR950015034B1 - Manufacturies of polyester fiber whilized large fineness - Google Patents

Abstract

The polyester fiber is produced by (a) first drawing undrawn denier yarns at 78˜85deg.C and 150˜250m/min with a drawing ratio of 3.0˜4.0, (b) crimping the yarn at 45˜64deg.C of the steam conditioner temp. and the nipping roller pressure of 1.5˜4.5kg/cm2 and the stuffing box pressure of 0.3˜1.0kg/cm2, and heat treating it at 120˜150deg.C for 20˜40 min. The polyester fiber has good crimp elasticity, compression elasticity, recovering ratio and bulky property, and is used for nonwoven fabrics, bed clothes and mattresses.

Description

Manufacturing method of polyester fiber using bamboo fineness

The present invention relates to a method for producing a polyester fiber having excellent residual elasticity and an improved bulky property by imparting special winding in a post-process using thick fineness. Secondary crimping structure by using crimping technology in stretching manufacturing process and adjusting conditions of steam conditioner temperature, crimper roller pressure, stuffing box pressure The present invention relates to a method for producing a polyester fiber by improving the expression, improving the residual crimp elasticity, compression elasticity, and recovery rate.

In the past, there was a case of manufacturing fibers using Tae fineness, but following the manufacturing of Tae fine product, unreasonable crimping caused by unreasonable crimping, the stability of crimping degree was decreased, and the product bleeding occurred. Due to the high density in the heat treatment process, it is difficult to maintain the residual crimp because it does not receive uniform heat, thereby reducing the compression elasticity and recovery.

Therefore, in order to solve the above problems, a method of providing a draw ratio and a high temperature controller crimping in a drawing manufacturing process has been proposed in theory, but it has not been put to practical use because a large effect could not be expected.

The present invention provides a method for producing a polyester fiber with improved residual crimp elasticity, compression elasticity, recovery by using the crystal orientation technology of the fiber in order to solve the above problems and by using the optimal crimping technique in the stretching process To do that.

Specifically, the present invention applies 6-25d unstretched denier spun at 265 ° C. to 285 ° C. in the stretching step to draw a stretching ratio of 3.0 to 4.0 times at 78 ° C. to 85 ° C. below the secondary transition temperature. The primary stretching is performed and the stretching speed is maintained at 150 to 250 m / min.

In order to manufacture the fiber having excellent bulky and residual crimp elasticity, compressive elasticity and recovery rate by using the stretched polyester stretched tow, the steam conditioner temperature conditions should be about 45 ℃ ~ 65 ℃. When the temperature is 45 ℃ or less, the crimp formation itself is a problem, and crimping is applied to the polyester fiber by force, thereby causing blemishes during heat treatment. Becomes

On the other hand, to form a crimp to maintain a 1.5 to 4.5kg / ㎠ at the pressure of the köpingola pressure to enter into the stuffing box (stuffing box), when the shape of the crimp acid is less than 1.5㎏ / ㎠, 4.5㎏ / When it is more than 2cm2, the shape of crimp acid is dense and it does not satisfy the requirements of this product.

Also, 0.3 ~ 1.0㎏ / ㎠ is most appropriate as the stuffing box pressure, and it is controlled to be mutually controlled with the steaming roller pressure, but if it is out of this range, sufficient effect cannot be expected and the length of the stuffing box is 200 ~ 250㎜. .

The polyester imparted with the second crimp is heat treated for 20 to 40 minutes in a range of 120 ° C. to 150 ° C., thereby producing a polyester fiber having excellent bulkiness.

The polyester fiber prepared according to the present invention is suitable as an industrial material that essentially requires a product having excellent crimp elasticity, compression elasticity, and recovery rate, and is mainly used for nonwoven fabrics, beddings, and mattresses.

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

Example 1

A polymer of I V 0.670 was used to spin at 285 ° C. and the take-out speed was 1200 m / min to obtain 5000 denier undrawn fibers.

The fiber is stretched at a draw ratio of 4.0 times, a drawing speed of 250 m / min, and a drawing temperature of 80 ° C. to a steam conditioner temperature of 60 ° C., a crimping pressure of 3.0 kg / cm 2 and a stuffing box pressure of 0.8 kg / cm 2. The polyester fiber was manufactured by giving crimp and heat-processing for 40 minutes at 120 degreeC heat processing temperature.

Example 2

It was prepared in the same manner as in Example 1 except that the steam conditioner temperature was 65 ° C., the steaming roller pressure was 1.5 kg / cm 2, and the stuffing box pressure was 1.0 kg / cm 2.

Example 3

It was prepared in the same manner as in Example 1 except that the steam conditioner temperature was set at 50 ° C., the tapping roller pressure was 2.0 kg / cm 2, and the stuffing box pressure was 0.5 kg / cm 2.

Example 4

It was prepared in the same manner as in Example 1 except that the steam conditioner temperature was 45 ° C., the pressure at the steaming roller was 4.5 kg / cm 2, and the stuffing box pressure was 0.3 kg / cm 2.

Comparative Example 1

It was prepared in the same manner as in Example 1 except that the steam conditioner temperature was 40 ° C.

Comparative Example 2

It was prepared in the same manner as in Example 1 except that the steam conditioner temperature was 70 ° C.

Comparative Example 3

It was prepared in the same manner as in Example 1 except that the pressure of the tipping roller was 1.0 kg / cm 2.

[Comparative Example 4]

It was prepared in the same manner as in Example 1 except that the Kipping-Rolar pressure was 5.0 kg / cm 2.

[Comparative Example 5]

It was prepared in the same manner as in Example 1 except that the pressure of the pressure vessel was 0.2 kg / cm 2.

Comparative Example 6

It was prepared in the same manner as in Example 1 except that the pressure of the doping roller was 1.2 kg / cm 2.

The physical property measurement results of the polyester fibers prepared in Examples 1 to 4 and Comparative Examples 1 to 6 are shown in Table 1, Table 2 shows the criteria for determination, and the physical properties used in Examples and Comparative Examples It carried out by the following method.

Crimp Bulky

ㆍ Measure the length of 2mg / de to the crimp tester (A)

ㆍ Measure the length to give the creep tester 300 mg / de

ㆍ Measure the length after removing the full load and leaving it for 2 minutes and giving the super load

(1) Crimping degree: The difference between the crimped fiber and the original length

(%) (Percent of former)

(2) Crimping elasticity: When crimping the fiber and letting it go for a certain period

(%) Difference with length when left.

Fiber bulkyness

ㆍ Constant sample volume (10 × 10㎠) 5g height at super load (A)

ㆍ 500g load height (B)

ㆍ Height at super load after load removal (C)

(3) Compression ratio: height given constant load to a certain sample volume

(4) Recovery rate: Remove the test load and measure the height when recovering

TABLE 1

TABLE 2

Claims (3)

After the primary stretching, the unstretched denier, which was spun at 265 ~ 285 ℃, was drawn at 3.0 ~ 4.0 times, and the draw speed was 150-250m / min at 78 ~ 85 ℃, and the steam conditioner temperature was 45 ~ 64 ℃, Polyester fiber characterized in that produced by heat treatment for 20-40 minutes in the 120 ~ 150 ℃ range of polyester impregnated with a secondary crimping pressure of 1.5-4.5kg / ㎠ pressure, stuffing box pressure 0.3-1.0kg / ㎠ Manufacturing method. A method of making a polyester fiber according to claim 1, wherein the Taesum degree is between 6-25d. The method of claim 1 wherein the length of the stuffing box is 200-250 mm.