KR20030088207A - Manufacturing method for differential denier and differential cross section fiber and fabric - Google Patents

Abstract

The present invention relates to the fabrication of fibers, and more particularly, to a fabric of denier, cross-section-specific fibers and processed fabrics thereof.

The present invention mainly uses the two kinds of polymers having different dissolution rates for alkali, and after dissolving each of them, the splitter and discharge hole for split type microfibers, which are generally produced by adjusting the mixing ratio, are composed of spinnerets having a heteromorphic cross section. Spinning yarn is used to spin the yarn, and the fiber can be produced directly by spin elongation yarn (SDY-spin draw yarn), or after stretching, temporary twisting flat yarn (flat yarn) draw-texture yarn ( draw texture yarn) or a composite flat yarn or composite drawtexture yarn by a composite process of drawing temporary braiding, and weaving the SDY, flat yarn, drawtexture yarn, composite flat yarn, composite drawtexture yarn After fabrication, alkali reduction is carried out to obtain a fabric having unusual denier and cross section with excellent texture and gloss.

Description

MANUFACTURING METHOD FOR DIFFERENTIAL DENIER AND DIFFERENTIAL CROSS SECTION FIBER AND FABRIC}

The present invention relates to a fiber manufacturing method,

Specifically, it relates to a denier, a fiber having a specific cross section, and a method of manufacturing the processed fabric thereof.

For a long time synthetic fibers have been provided for medical use. Consumers' desire for the feel and functionality of synthetic fiber products is increasing, and the textile industry has also spurred research to develop synthetic fiber fabrics with denier or cross-section and silky texture or luster. It meets your needs. Several inventions have already been known in recent years in the development of such synthetic fibers. For example, Japanese Unexamined Patent Publication Nos. 6-41868, 6-287835, 9-59826, and 24 February 1999, the CN1208780A patent application publications disclosed on February 24, 1999 all have different alkali dissolution rates. After melting each of the two types of polymers, the mixing ratio is adjusted, and the mixture is sufficiently mixed using a so-called static mixing element or a static mixer to spin. It also produces unusual synthetic fibers in denier cross sections. In the production method, all the static mixers should be installed in the projection packs. However, in order to omit the installation space, the size of the projection packs is small, and accordingly, the static mixers can be made smaller in the projection packs. There is a need.

In addition, the number of mixing elements of the static mixer generally needs to be a specified number to obtain a proper mixing effect. However, increasing the number of mixing elements by reducing the static mixer makes the mixer expensive, and also allows the polymer to pass through. When the pressure is too high, the service life of the projection pack is shortened. Moreover, if the polymer pyrolysis occurs, the strength of the fiber decreases, the single yarn in production increases and the quality of the product is affected. Crazy

In order to solve this problem, the present inventors have continued the research and finally developed the following manufacturing method.

After dissolving each of the two polymers with different alkali dissolution rates, the mixing ratio is adjusted, and the splitter and discharge holes for split type microfibers, which are generally used in production, are heteromorphic. Fibers are produced by spinning using a projection pack consisting of spinnerets of spinnerets, and the fibers are directly drawn into spin draw yatn (SDY) by spinning or stretching and temporary twisting. Then, a flat yarn, a draw texture yarn is prepared, or by a compounding process of drawing and temporary braiding into a flat yarn, a composite draw texture yarn. And weaving the SDY, flat yarn, draw texture yarn, composite flat yarn, composite drawtextur yarn to form a woven fabric, and then reducing the weight with an alkaline solution. Together so that the luster is very good denier and cross section can be obtained fabric has a unique purpose.

1 is a cross-sectional view showing a projection pack using the method of the present invention

Fig. 2 is a fragmentary view of a distributor for split-type microfibers generally produced using the method of the present invention.

Figure 3 is a diagram showing the release discharge hole of the spinneret used in the method of the present invention

4 is a cross-sectional view showing a fiber having unusual deniers and cross-sections produced by the method of the present invention.

Fig. 5 is a cross-sectional view showing a fiber having a unique denier and cross section produced by the method of Comparative Example.

Explanation of symbols for main parts of the drawings

1: polymer with slow alkali dissolution rate

2: polymer with high alkali dissolution rate

3: filtration sand

4: filtration screen

5: Splitter for split-type microfibers generally produced

6: spinneret of the release section

7: Splitter for split-type microfibers with 12 splits

8: Splitter for split-type microfibers, which are commonly produced in 16 divisions

9: Splitter for split-type microfibers, commonly produced in 24 divisions

10: spinneret of cross discharge

11: spinneret of octagonal discharge hole

12: Spinneret of Y type discharge hole

Hereinafter, the features of the present invention will be described in detail.

According to the present invention, in the use of two kinds of polymers having different alkali dissolution rates, for example, the polyester polymer may be selected from the group consisting of diethylene glycol, propylene glycol, siglohexamethylene glycol, polyethylene glycol, terephthalic acid, A modified polyester polymer having a high alkali dissolution rate obtained by copolymerization by adding a third component such as isophthalic acid, sulfoisophthalic acid, adipic acid, azelic acid and sebacic acid can be used.

In addition, a general unmodified polyester polymer is used as a polyester polymer having a slow alkali dissolution rate.

The polymers having different alkali dissolving rates were put into a NaOH alkaline solution having a temperature of 105 ° C. and a concentration of 1.0 wt%, and the solubility ratio of the polymer and the alkaline liquid was adjusted to 1:45 and left for 10 minutes. The rate of dissolution rate in the alkaline liquid of the fast polymer and the slow polymer is 275: 1.

After dissolving each of the two polymers having different alkali dissolution rates, the mixing ratio is adjusted to adjust the mixing ratio of the polymer having a slow dissolution rate and the rapid polymer to a range of 85: 15-50: 50. Normally, the proportion of polymers with fast dissolution rates should not be too small, and if less than 15%, the woven fabric will not have a delicate texture after weight loss.

Conversely, if the proportion of polymers with a fast dissolution rate exceeds 50%, the short fiber denier of the fabric after weight loss is too thin, so that no suitable denier and cross section are unique, and if the weight loss ratio is too large, the manufacturing cost increases and Because of the lack of tear strength, the mixing ratio of a polymer having a slow dissolution rate and a polymer having a high dissolution rate is most suitably in the range of 85: 15-50: 50.

A metering pump was used to adjust the mixing ratio of the molten phase polymers having different alkali dissolution rates in the range of 85: 15-50: 50 and put the two polymers in the center of the projection pack shown in FIG. In the projection pack of FIG. 1, (1) is a polymer having a low alkali dissolution rate, (2) is a polymer having a high alkali dissolution rate, (3) is a filtration sand, (4) is a filtration screen, and (5) is generally produced. The splitter for split-type microfibers, (6), is a spinneret of a deformed section.

Using a metering pump, the molten-phase polymer (1) and the polymer (2) having different alkali dissolution rates put into the protrusion pack are passed through the filtration sand (3) and the filtration screen (4) to remove the trapped products in the polymer. The split type microfibre splitter 5, which is generally removed, produces a split array in the two polymers, radiates it through the spinneret 6 of the release discharge hole, and has an irregular cross-sectional shape. To produce fibers.

The yarn bundle discharged from the spinneret of the release discharge hole can produce POY (Partially Oriented Yarn) or MOY (Middle Oriented Yarn) by cooling, oiling, and rolling.

Alternatively, SDY (Spin Draw Yarn) can be prepared after cooling, oiling, direct spinning, and finishing.

POY and MOY can produce flat yarn draw textile yarns by further stretching or temporary twisting. Alternatively, composite flat yarns or composite draw textile yarns can be produced by combining with other yarns during the stretching and temporary braiding process.

Thus produced flat yarns, draw textile yarns, composite flat yarns, composite draw textile yarns, SDY weaving into a fabric, and then reduced by alkaline solution to obtain a fabric with unusual denier and cross-section is very excellent in texture and gloss.

FIG. 2 is a fragmentary view of a generally produced splitter for split type micro fibers used in the present invention. FIG. (7) is a splitter for split-type microfiber, which is generally produced in 12 divisions. (8) is a splitter for split-type microfiber, which is generally produced in 16 divisions. It is a split type microfibre distributor, and if the number of distributors is not large, the mixing effect of the two polymers becomes more remarkable in the cross section of the yarn discharged from the spinneret of the release jet hole, but such a distributor is very expensive. The present invention enumerates only three types of divided numbers in Fig. 2, but the claims of the present invention are not limited thereto.

3 is a shape design diagram of the release discharge hole of the spinneret used in the present invention.

Denoted at 10 is the spinneret of the cross-shaped discharge hole, and 11 is the spinneret of the octagonal discharge hole 12 is the spinneret of the Y-type discharge hole.

The spinneret of the release-discharge hole used in the present invention is a projection other than that of the above design or the annular discharge hole shape. If the discharge hole uses an annular spinneret, the yarn produced will be the same as the split-type microfibers currently on the market, and the cross section of the fiber exhibits a regular segmented arrangement. And denier does not have the same change, and cannot produce a fabric having a unique denier cross section excellent in texture and glossiness. The release ejection hole of the spinneret used in the present invention is not limited to the three types shown in Fig. 3, but in general, the design of the shape of the ejection hole is, in principle, made as large as possible in consideration of the cross section of the fabric to be produced. In order to reduce the weight, the area of contact between the fiber and the alkaline liquid is increased to reduce the weight.

EXAMPLE

The polymer mixing ratio is adjusted with respect to a polyester polymer having a low viscosity of alkali dissolution as a viscosity of 3000 poises and a polyester polymer having a high alkali dissolution rate at which a polyethylene glycol and sulfoisophthalic acid is added as a viscosity of 3500 poise. The mixing ratio of the polymer and the fast polymer is 70:30, and the number of divisions of the splitter for split-type microfibers, which are generally used in the projection pack, is set to 16 divisions. The number of holes is 48 spin temperature 291 ° C, winding speed 2500m / min, denier 1126 dtex, strength 1.6cN / dtex, elongation rate 160%, and short fiber cross-sectional shape as shown in FIG.

[Comparative Example]

The same composition of the polymer, the mixing ratio of the polymer, and the spinneret of the cross-shaped release ejection holes of the same number of holes are used. The mixing element number was changed to 6 static mixer, spinning temperature 291 ° C, winding speed 2500m / min, denier 126 dtex, strength 1.45 cN / dtex, elongation rate 155%, short fiber cross section as shown in FIG.

From the above experimental results, in the examples, the denier and fiber having a unique cross section (short fiber cross-sectional shape as shown in Fig. 5) manufactured using the manufacturing method of the present invention are irregularly arranged in a shape with abundant variation in the short fiber cross-section. Although the denier and cross section fibers produced by the manufacturing method of the present invention are superior to the fibers produced by the manufacturing method of the comparative example in both the strength and the elongation of the fiber, the production method of the present invention does not require a stop mixer. This has the effect of reducing the purchase cost.

Claims (3)

By using two kinds of polymers (polymer-polymers) having different dissolution rates in alkaline solution, the mixing ratio of the two polymers with slow dissolution rate and fast polymer is controlled in the range of 85: 15-50: 50. , Denier and cross-section is characterized by using a splitter and a discharge pack for a general split type microfiber using a spin pack consisting of a spinneret of a deformed cross section. Preparation of the fiber. The polymer of claim 1, wherein the polymer has a high dissolution rate in an alkaline solution is selected from the group consisting of dithylene glycol, propylene glycol, cyclohexamethylene glycol, polythulene glycol, and terephthalate in the polymer. 1 species selected from terephthalic acid, isophthalic acid, sulfo isophthalic acid, adipic acid, azaelaic acid and sebacic acid It is a polyester polymer obtained by adding a 3rd component of a phase and carrying out copolymerization, The manufacturing method of the fiber which has a denier and a cross section unique. The method for producing a fiber having a unique denier and cross section according to claim 1, wherein the fiber produced is knitted to form a woven fabric.