KR0176024B1 - Method for polyester bicillate modified cross-section fiber for the substitution for acetate - Google Patents

Abstract

The present invention relates to a method for preparing an acetate- replaceable polyester release cross-section yarn that can solve the disadvantages of acetate strength and dyeability while utilizing the dry touch and gloss, color and pleasant touch of acetate, dimethyliso-5-sodium sulfo 1.5 to 5 parts by weight of ceramic particle silica and 1 to 3 parts by weight of titanium oxide were added to the modified copolymerized polyester with 1.5 to 3.5 parts by weight of nate added (circumferential length of the discharge hole) ² / discharge hole cross-sectional area value of 100 A novel invention relating to a method for producing an acetate- replaceable polyester cross-section of a polyester, characterized in that the cross-sectional structure of ˜200 is melt spun with spinnerets having 5-leaf and cross-shaped discharge holes.

Description

Manufacturing method of acetate substituted polyester isomido cross-section yarn

1 is a cross-sectional view of (a) and (b) is a spin discharge hole for producing a polyester cross-sectional heteromorphic section yarn of the present invention,

2 is a schematic view of the spinning apparatus of the present invention, the polyester fine island heteromorphic cross section yarn.

* Explanation of symbols for main parts of the drawings

1: spinneret 2: emulsifying roller

3: cooling chamber 4: moving nozzle

5,6: Gauze roller 7: Interlaced nozzle

8: winder

The present invention relates to a method for producing a polyester release cross-section yarn to replace the acetate yarn, in particular the dry touch, deep color, light and thick feeling, gloss, drape and wear comfort of the acetate cross-section and polymer modification The present invention relates to a method for producing a polyester release cross-section yarn to be realized in polyester.

Recent trends in fashion tend to be NATURAL while aiming for a synthetic fiber, and a material that meets this trend is a semi-synthetic fiber group such as acetate or rayon, and composite materials of these fibers are creating demand along with popularity. It is causing a phenomenon called a composite boom.

However, these acetate fiber products are gaining popularity, but since the yarn price is high and the supply of supplies is not stable, there is a high demand for acetate companies, but in reality, they are not supplied due to lack of materials.

Acetate fiber has an elegant gloss, low crystallinity and color development according to the degree of orientation and irregular cross-sectional shape due to dry touch and unique cross-sectional irregularities.

However, these acetate fibers have low strength and are usually used in combination with polyester, and cannot be used alone. In combination with polyethylene terephthalate (PET), dyes and dyeing properties are different from polyester, so it is difficult to uniformly dye. There are disadvantages such as going well.

The present invention relates to the production of acetate- replaceable polyester release section yarn that can solve the disadvantages such as the strength and dyeability of the acetate while utilizing the dry touch and gloss, deep color and comfortable touch of the acetate.

The present invention will be described in more detail below.

In the present invention, in order to express the characteristics of the acetate yarn, the cross-section of the acetate is implemented using a five-leaf and cross-section shaped cross-section yarns having similar cross-sections. CHANNEL) to express unique touch and luster.

As a polymer, color development was enhanced by using a modified copolymerized polyester by adding dimethyliso-5-sodiumsulfonate which can be dyed with a cationic dye. In the case of the copolyester with a content of dimethyliso-5-sodiumsulfonate of less than 1.5 parts by weight, the cationic dye does not exhibit sufficient dyeing property. In the case of the copolyester of more than 3.5 parts by weight, the alkali resistance is sharply lowered to reduce the weight. It is preferable to use dimethyliso-5-sodiumsulfonate copolymer polyester within the range of 1.5 to 3.5 parts by weight because excessive weight loss occurs and the elongation is severely deteriorated so that application of the fabric is difficult.

In addition, a modified polyester containing a large amount of ceramic particle silica and titanium oxide was used to improve the deep color of the fine iron on the surface of the yarn after the weight loss and to express a unique rough touch.

If the silica content is less than 1 part by weight, microcraters are less produced after the weight loss process, resulting in less color depth. In the case of titanium oxide, it is impossible to express a rough touch after the weight loss.

In addition, when the silica particles are more than 5 parts by weight or the titanium oxide is more than 3 parts by weight, it is difficult to manufacture the polymer due to the viscosity increase in the polymerization process, and even in the spinning process, uniform heat treatment is difficult, which leads to the occurrence of salt spots. It is suitable to use a polyester containing 1.5 to 5 parts by weight of ceramic particle silica and 1 to 3 parts by weight of titanium oxide.

Detailed description of the acetate detention is as follows.

In order to realize acetate gloss and dry touch and continuous grooves in the fiber axis direction unique to acetate, the foliar cross section of FIG. 1 (a) and the cross section of FIG. 1 (b) are suitable.

In the spinneret, the value of (circumferential length of the discharge hole) ² / (discharge hole cross-sectional area) is preferably 100 or more, and if it is less than that, the cross-section becomes close to the circular shape by the swelling of the polymer to express the characteristics of the acetate replacement fiber. can not do. In the case of 300 or more, it is difficult to produce precise detention due to the complicated cross-sectional shape, and there is a problem of cleaning, and it is detained in the range of 100 to 300 because of the occurrence of pack bundle and shortening of the pack cycle due to back pressure increase. It is desirable to design.

It is desirable to design the back pressure within the range of 50 ~ 200㎏ / ㎠, and below 50㎏, the cross section fluctuates badly due to the discharge failure caused by the irregular flow of polymer. Lose.

By the following Examples and Comparative Examples will be described in detail the present invention.

Example 1

Polyethylene terephthalate copolymerized with 2.3 parts by weight of dimethyliso-5-sodiumsulfonate and 1.0 part by weight of polyethylene glycol was melted at a spinning temperature of 288 ° C, and then discharged through a mold in the cross section in the form of Fig. 1 (a). After cooling and solidifying with air at 0 ° C. to supply an emulsion, stretching and heat setting were carried out to prepare 75de / 24f yarn at a winding speed of 4000m. In order to evaluate the characteristics of the obtained yarn, the filament yarn was twisted at 1200T / M and used as warp and weft yarns to weave into a flat structure. At this time, the fabric density was 110 yarns / inch and 90 yarns / inch. The reduction rate is 14% and the shrinkage rate is 11%. Other processing conditions depend on the processing of ordinary polyester long fiber fabrics.

The value of (circumferential length of discharge hole) ² / (discharge hole cross-sectional area) of the detention discharge hole used at this time was 250.

Example 2

As in Example 1, the shape of the discharge hole during spinning was used, except that the discharge hole shown in FIG. The value of (circumferential length of discharge hole) ² / (discharge hole cross-sectional area) of the detention discharge hole used at this time was 250.

Example 3

As shown in Example 1, the discharge filament has 12 filaments in the form of the discharge hole shown in FIG. 1 (a), and the remaining 12 filaments use the spinneret shown in FIG. It was.

At this time, the detentions used were arranged alternately with each other so that the different shapes of 12 filaments were mixed in the shape shown in FIG. 1, and the (circumferential length of the discharge hole) ² / (discharge hole cross-sectional area) value of each detention discharge hole 250 was used.

Example 4

The same procedure as in Example 1 was conducted except that the polyethylene terephthalate polymer was uniformly kneaded with 3.0 parts by weight of silica and 1.3 parts by weight of titanium oxide to express fine and irregular irregularities on the yarn surface after processing by ceramic particles.

Example 5

The shape of the discharge hole during spinning was the same as in Example 4 except that spinnerets of the type shown in FIG. 1 (b) were used.

Example 6

The discharge hole used for spinning is 12 filament except that the cross section of the shape shown in FIG. 1 (a) is used, and the remaining 12 filaments are used in the spinneret of the type shown in FIG. It carried out similarly to Example 4.

At this time, the detentions used were alternately arranged so that different shapes of 12 filaments were mixed in the form shown in FIG. 1, and each of the detention discharge holes (circumferential length of the discharge hole) ² / (discharge hole cross-sectional area) The value used was 250.

Comparative Example 1

Polyethylene terephthalate having an intrinsic viscosity of 0.66 was used to melt-spin through a circular spinneret having a circular shape of the discharge hole, and the other conditions were the same as in Example 1.

Comparative Example 2

The same as Comparative Example 1, the discharge hole was used as the spinneret shown in Figure 1 (a).

Comparative Example 3

The same as that of Comparative Example 1 and the shape of the discharge hole used the spinneret shown in FIG.

[Comparative Example 4]

The same as Comparative Example 1, and the discharge holes used were formed of alternating detention arrangements in which the shapes shown in FIGS. Used.

[Comparative Example 5]

The value of the (circumferential length of the discharge hole) ² / (discharge hole cross-sectional area) of the discharge hole was the same as that in Example 1 except that 50 was used.

Comparative Example 6

The value of the (circumferential length of the discharge hole) ² / (discharge hole cross-sectional area) of the discharge hole was the same as that of Example 2 except that 50 was used.

Comparative Example 7

The (circumferential length of the discharge hole) ² / (discharge hole cross-sectional area) value of the discharge hole was the same as in Example 4 except that 50 was used.

Comparative Example 8

The value of (perimeter length of the discharge hole) ² / (discharge hole cross-sectional area) of the discharge hole was the same as that in Example 5 except that 50 was used.

The strength, water absorption, deep colorability, acetate glossiness, dry touch, and after-feel of the comparative examples and examples were measured and evaluated. As an evaluation method, the absorbency was measured by cutting the test fabric into the size of 20 cm × 3 cm in the oblique direction, immersing the tip 0.5 cm in the water with the ink, and measuring the time required for the ink liquid to rise to the point of 15 cm. The surname is represented by an L value measured by superimposing a sample dyed in black using a digital color difference meter in a state where three-piece irradiation light does not transmit. Glossiness, dry touch feeling, and afterglow feeling (lightness + thickness feeling) performed the sensory evaluation.

In the case of sensory evaluation, 10 subjects were evaluated by fabric, and the subjective evaluation results of each individual were indicated as ◎: 9 or more, ○: 6 to 8, △: 3 to 5, and ×: 2 or less.

The evaluation results are shown in Table 1. In the case of using the release section compared to the circular section, the strength tends to decrease slightly, but this is not a problem at all in post-processing and use. Acetate gloss and dry touch, color tone, and color depth are determined according to the shape of the cross section and the polymer selection The results are different due to the surface irregularities caused by the weight difference.

In the color tone aspect, Examples 4 to 6 are superior to 1 to 3, but instead of 1 to 3 using a cationic salting polymer, the sharpness is excellent. The dry touch was greatly affected by the tactile sensation, the capillary shape, and the polymer affecting the weight loss. The silica-added polymer showed excellent dry touch feeling after the weight loss. The rear feeling is most affected by the shape and release ratio of the cross section. It can be seen that the examples using cross-sections and cross-sections in general have very good acetate properties.

In addition, in Comparative Examples 6 to 8 using spinnerets having a circumferential length of ² / (outlet hole cross-sectional area) of 100 or less, the cross-sectional shape was almost circular, and thus the acetate properties were not expressed. have.

Claims (2)

1.5 to 5 parts by weight of ceramic particle silica and 1 to 3 parts by weight of titanium oxide were added to the modified copolymerized polyester having 1.5 to 3.5 parts by weight of dimethyliso-5-sodium sulfonate added. A method of manufacturing an acetate- replaceable polyester cross-section yarn, characterized in that the melt spinning using a spinneret having a five-leaf and cross-shaped discharge hole as shown in a) or (b). The method according to claim 1, wherein the value of (circumferential length of the discharge hole) ² / (discharge hole cross-sectional area) of the spinneret having the discharge hole having the five-leaf and cross-shaped cross-sectional structure is in the range of 100 to 200. .