KR930011318B1 - Extra table composite yarn - Google Patents

Abstract

The fiber, whose shape base point of the cross-section is located on the circumference of radius r, satisfying o < r < R (where R: radius of the cross-section of the extractable composite fiber, r: length from the center of the extractable composite fiber to the shape base point of the extractable composite fiber), is composed of: 90-60 wt.% of the fiber-forming polymer (A), divided into more than 4 segments by the highly-solucble polymer (B), and 10-40 wt.% of the highly-soluble polymer (B), radially branched from the shape base point of the cross-section of the filament, in a way that polymer (A) and polymer (B) are arranged in an alternating pattern.

Description

Extractive Composite Fiber

1 is an example of an enlarged cross sectional view of a distribution plate and extractable composite fiber produced therefrom used to prepare an existing extractable composite fiber of Comparative Example 1. FIG.

2 is an example of an enlarged cross sectional view of a distribution plate and extractable composite fiber produced therefrom used for producing the extractable composite fiber of the present invention of Example 1. FIG.

Figure 3 is an example of an enlarged longitudinal sectional view of the detention apparatus used to manufacture the extractable composite fiber of the present invention.

4 is an example of an enlarged cross-sectional view of a distribution plate used to prepare the extractable composite fiber of the present invention of Example 2 and an extractable composite fiber produced therefrom.

The present invention relates to an extractable composite fiber. The present invention will be described in more detail, after fabricating with woven or knitted fabrics, and extracting and removing highly soluble polymers to finely segment segments of the fiber-forming polymers and to disperse them to form a sense of volume, thereby having a soft texture. The present invention relates to an extractable composite fiber for medical use.

The technique of extractable composite fiber which can segment the fineness of the other component by extracting and removing the polymer of one component after positing the composite fiber is already known in Japanese Patent Application No. 48-28005. to be.

The cross-section of the extractable composite fiber proposed in Ilchi 48-28005 is shown in Fig. 1. The extractable composite fiber having this type of cross-section can be used to dissolve and remove the radial polymer, which is a highly soluble polymer. Although fineness can be segmented, it is impossible to obtain a fabric having a soft texture because the remaining segments are concentrated and the volume is poor.

The present invention relates to a technique for improving the problems of the prior art as described above, the remaining segment after extracting and removing a polymer of one component is a fine fine segment, while improving the defect that the segment is easy to focus, thereby forming a feeling of softness It relates to producing an extractable composite fiber capable of producing a fabric having a.

The present inventors have completed the present invention as a result of earnestly researching a method for overcoming a phenomenon in which the remaining segments after extraction of a polymer of one component, which is a drawback of the conventional extractable composite fiber, are completed.

The reason for the concentration of the remaining segment after extracting the one-component polymer, which is a drawback of the conventional extractable composite fiber as shown in FIG. 1, is that the segment is formed symmetrically with respect to the center of the cross section due to the shape of the cross section. It was found that the result of disabling the stress is the result of disabling. In other words, the present inventors can improve the focusing phenomenon of the remaining segment after extraction, which is a drawback of the existing extract type composite fiber, by making the cross sectional shape of the extract type composite fiber so as to bias the stress received after the removal of one component. It was found that the method and the present invention was completed.

In the extractable composite fiber of the present invention, the fiber-forming polymer (A) and the polymer (B) having higher solubility than the fiber-forming polymer (A) are branched radially around the morphological reference point of the cross section of the filament, but the fiber-forming polymer is In the extractable composite fiber in which (A) and the polymer (B) are arranged alternately, and the fiber-forming polymer (A) is divided into four or more segments by a highly soluble polymer (B). The shape reference point of the filament cross section is located on the circumference of the radius r satisfying the range of 0 <r <R, wherein R is the radius of the cross section of the extractable composite fiber, and r is the center of the extractable composite fiber. To the length of the extractable composite fiber morphology reference point.

In addition, the extractable composite fiber is characterized in that the highly soluble polymer (B) is formed in 10-40wt (%), the fiber-forming polymer (A) is formed in 90-60wt (%).

Figure 2 shows an example of a cross section of the extractable composite fiber of the present invention. Although the fiber-forming polymer (A) is dispersed in eight segments by the highly soluble polymer (B), the morphological reference point of the extractable composite fiber is located on the circumference of the radius r satisfying the range of 0 <r <R. The size of the eight segments formed may be different, and thus the bias of the stress received after the extraction and removal of one component may be improved, thereby improving the focusing phenomenon of the segment.

In addition, in order to be an extract type composite fiber for a fabric having a volume and a soft texture, which is an object of the present invention, the number of remaining segments after extraction needs to be 4 or more for ultra miniaturization, but preferably 22 or less, particularly 6-14. Dogs are good.

In general, polymers having high solubility (B) have a lower softening point than fiber-forming polymers (A), and have a high absorbency or oil absorption, so that adhesion between filaments may occur during the production process. It is necessary to occupy the filament surface.

In addition, the segments formed of the fibrous polymer (A) component by the highly soluble polymer (B) must be reliably segmented. In order to do so, the minimum ratio of the highly soluble polymer (B) must be limited. It is necessary to limit the maximum ratio of the polymer (B) having high solubility in order to eliminate the factor of the denseness of the fabric and the increase in production cost due to excessive extraction of (B).

Therefore, the minimum and maximum ratios of the polymer (B) having high solubility are 10-40 wt (%) for the polymer (B) having high solubility and 90-60 wt (for the fiber-forming polymer (A) according to the experiments of the present inventors. %) Is the optimum condition to satisfy the above condition.

As the fiber-forming polymer (A), a polymer having a known fiber-forming ability, that is, polyamide, polyester, polyolefin, or the like is useful. As the polyamide, for example, nylon 6, nylon 66, nylon 11, nylon 12, nylon 610 and copolymerized polyamides having these as the main components are well known. As polyesters, for example, polyethylene terephthalate, polybutylene terephthalate, Polyethyleneoxybenzoate, poly 1, 4-dimethylcyclohexane terephthalate and copolyethers having these as main components are well known, and polyethylene, polypropylene and the like are well known as polyolefins.

Even if the polymer other than the above-mentioned base material is a polymer having a fiber forming ability, it can be applied as a fiber forming polymer (A) of the extractable composite fiber of the present invention.

The polymer (B) having high solubility should be easily extracted in consideration of the combination with the fiber-forming polymer (A). In the case of the polyamide, polyester, and polyolefin, the fiber-forming polymer (A) has high solubility. As the polymer (B), polyethylene-terephthalate obtained by copolymerizing one or two kinds of alkali hydrolyzable cone copolymerized polyesters such as dicarboxylic acid other than terephthalic acid having a polyalkylene glycol or a metal sulfonate group is useful.

The following describes an example of a method for producing an extract-type composite fiber of the present invention.

Figure 3 is a detailed view of the detention apparatus for manufacturing the extractable composite fiber of the present invention, the fiber-forming polymer (A) component to P1, the highly soluble polymer (B) component into the P2 and then filtered After passing through the distribution plate, the two components are combined at the X-X 'site to form a composite section, which is then radiated to the orifice through the inlet.

At this time, in order to bias the stress received after extraction, the fiber-forming polymer (A) of the present invention and the highly soluble polymer (B) are distributed in the distribution plate of FIG. 3 so as to be radially branched around the shape reference point of the filament cross section. Formation area of component (A) and component (B) If the polymer flow path is a cross-section of the extract type composite fiber having a cross-sectional shape as shown in FIG. 2, the cross-sectional shape as shown in FIG. It becomes possible.

The extractable composite fibers discharged through the detention orifices are then cooled and solidified, treated with a spinning emulsion, and wound at a speed of 800-3,000 m / min in the winder. In the case of filament, the non-drawn yarn prepared as described above is preheated with a heating roller at 70-100 ° C., followed by stretching at 1.5-4.5 times, and heat-setting in a heat pipe at 100-180 ° C. to prepare the drawn yarn.

The extractable composite fiber thus prepared can be made of ultrafine fibers formed from the fiber-forming polymer (A) while extracting a highly soluble polymer (B) component. The extracted composite fiber produced in this way is reduced in weight as much as extracting the polymer (B) having high solubility, and thus the development of high-density fabrics such as split microfibers is disadvantageous. It is possible to develop new fabrics and to improve the dyeing and operating properties due to the mixture of two-component fiber-forming polymers, which are disadvantages of the split composite fiber.

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

The extract composite fiber of the present invention was measured for the improved physical properties of the fabric compared to the conventional extractable composite fiber, and the measurement of the texture is the KES method (Japan, Kawada, standardization and analysis of the texture evaluation 2nd edition, fiber The Mechanical Society of Korea, 1980) used to measure tensile, shear, friction, and bending characteristics, and numerically quantified the components.

However, the present invention is not limited to the examples.

Example 1

75 wt (%) of polyethylene terephthalate having an intrinsic viscosity of 0.63 in 25 ° C. osochlorophenol was used as the (A) component of the fiber-forming polymer, and has an intrinsic viscosity of 0.59 in the 25 ° C. osochlorophenol containing 6 mol% of sulfonate salt. 25 wt (%) of copolymerized polyethylene terephthalate was composite spun as a polymer (B) component having high solubility. At this time, the spinning temperature is 290 ℃, the diameter of the detention orifice is 0.23mm, the number of times is 36, the number of segments formed of the fiber-forming polymer (A) as shown in Figure 2 is 8, the shape reference point that satisfies r = 1 / 3R It was melt spun using a distribution plate with and cooled in air and wound up at a speed of 1,300 m / min.

The unstretched yarn is rolled in a heat drawing machine to produce an extractable composite fiber of 120 denier / 36 filament with a temperature of 75 ° C, a hot plate temperature of 135 ° C, and a draw ratio of 3 times, and a yarn of 300T / M is used as a weft yarn. Polyethylene terephthalate of 75 denier / 72 filament of non-composite fiber was used as a warp yarn and woven into a plain weave with a warp density of 69 bones / cm and a weft density of 39 bones / cm. The woven fabric was relaxed in a 35 g / l aqueous solution of caustic soda in a continuous refining machine for 98 ° C × 20 minutes to extract the highly soluble polymer (B), followed by presetting and dyeing for 180 ° C × 45 seconds, followed by 160 ° C × 45 seconds. After the set, the KES method was adopted to measure the shape of the fabric, and the results are shown in Table 1.

Comparative Example 1

Fabrics were prepared in the same manner as in Example 1 except that the number of segments formed of the fibrous polymer (A) was 8 and the existing distribution plate as shown in FIG. 1 satisfying the form reference point of r = 0 was used. The condition of the fabric was measured by adopting the KES method and the results are shown in Table 1.

Example 2

Example 1, except that the number of segments formed of the fiber-forming polymer (A) is six, and the distribution plate for extracting composite fiber of the present invention, such as the fourth, satisfying the morphological reference point of r = 2R / 3 is used. Fabrics were prepared in the same manner as described above, and the condition of the fabrics was measured using the KES method, and the results are shown in Table 1.

TABLE 1

Kosi and Hari are related to repulsion, and New Mary is associated with softness, and can be divided into 11 stages of 0-10.

It can be seen from Table 1 that the fabric made of the extractable composite fiber of the present invention is a fabric having resilience and soft characteristics compared to the fabric produced by the existing extractable composite fiber of the comparative example.

Claims (2)

The polymer (B), which is more soluble than the fiber-forming polymer (A) and the fiber-forming polymer (A), is branched radially around the shape reference point of the filament cross section, but the fiber-forming polymer (A) and the polymer (B) An extractable composite fiber in which fiber-forming polymers (A) are divided into four or more segments by alternately arranged and highly soluble polymers (B), wherein the shape reference points of the filament cross sections of the extractable composite fibers are in the following ranges Extractive composite fiber, characterized in that located on the circumference of the radius r satisfying. -next- 0 <r <R Where R is the radius of the cross section of the extractable composite fiber, r: Length from the center of extractable composite fiber to the shape reference point of extractable composite fiber The extractable composite fiber according to claim 1, wherein the highly soluble polymer (B) is 10-40 wt (%) and the fiber-forming polymer (A) is 90-60 wt (%).