KR940010461B1 - Mixing yarn and utilizing woven fabric - Google Patents

Abstract

This is for manufacturing mixed fiber that has aesthetical appearance like silk and special tactile sensation. The mixed fiber is manufactured by effectively mixing filament of low contraction and filament of polyester copolymer of high contraction. The filament of low contraction is prepared by drawing complex fiber of divided type that is consisted of polyester and polyamide at 150-190 deg.C and TPM 1900-3500 and has 20-50 % of contraction ratio.

Description

Bi-shrink blended yarn and fabric using same

1 to 4 are cross-sectional views of the composite fiber applicable to the present invention.

* Explanation of symbols for main parts of the drawings

1: polyester 2: polyamide

3: hollow

The present invention relates to a bi-shrink blended yarn and a fabric using the same. More specifically, the present invention relates to a low shrinkable filament yarn and a high shrinkable copolymer polyester filament yarn obtained by twisting a fiber-forming polyester and a polyamide split composite fiber. The present invention relates to a bi-shrink blended yarn fabric which has a surface appearance and aesthetic appearance such as natural silk (silk), which is effectively blended to prepare a bi-shrink blended yarn, and is woven and dyed.

In the past, many studies have been conducted to obtain a surface feel and appearance as natural silk as synthetic fibers. For example, a method by releasing yarn cross-sections (US Patent No. 2939201), and a method by diaxial horn fiber yarns in which two unstretched yarns are drawn and mixed with different heat treatment conditions (Japanese Patent Application Laid-Open No. 56-140114). ), The method by biaxial blending yarn composed of two modified filament yarns (Japanese Patent Laid-Open No. 53-134646), the method by biaxial blending yarn with alkali reduction rate difference (Japanese Patent Publication No. 58-91867), The method by miniaturizing the short fibers constituting the yarn has been studied, and the improvement of the feel, the drapeability, and the provision of bulkiness have been attempted.

However, the above methods were effective to some extent to improve the fractional properties of natural silk, but the aesthetic appearance and unique surface feel of natural silk did not reach that of natural silk.

Accordingly, it is an object of the present invention to provide a fabric having the aesthetic appearance and unique surface feel of natural silk and a biaxial blended yarn for the manufacture of the fabric.

In order to achieve the above object as well as another object that can be easily expressed in the present invention, low-shrinkable filament yarn and non-aqueous yarn finely divided to 0.1 ~ 0.2 denier level by composing the fiber-forming polyester and polyamide split composite fiber By blending high shrinkage yarns with a shrinkage rate of 20 to 50% by air mixing, micro-spun polyester and polyamide filament yarns exist around the high shrink yarns to provide bishrinkage blended yarns with fine crimping and bulkiness At the same time, weaving is carried out using the above-mentioned biaxially woven fiber and then dyed by a conventional dyeing process, causing shrinkage of high shrink yarns, so that a high shrink yarn acts as a supporter on the inner layer of the fabric, and a number of ultra-fine filament yarns By giving the bulkiness and bulkiness, the aesthetic appearance and uniqueness of natural silk A fabric having a surface feel was provided.

The present invention is described in more detail as follows.

As the polyester of the polyester / polyamide split composite fiber used to obtain a biaxially blended fiber in the present invention, a fiber-forming polyester represented by polyethylene terepha-late or a copolymer thereof may be used. As the polyamide, both fiber-forming polyamides represented by nylon 6 or nylon 66 may be used.

The split type composite fiber of the present invention is effective to have a single yarn fineness of about 2 denier, and is separated into ultrafine yarn having a level of 0.1 to 0.2 denier through a combustion process and a dyeing process. In the combustion process, the division ratio is 20 to 50%, and if the division ratio is less than 20%, the separation rate of polyester and polyamide is insufficient even after dyeing is completed. In this case, the surface of the final fabric is very good, but there is a disadvantage in reducing the working efficiency due to excessive trimming during air mixing with the high shrinkage polyester filament yarn.

The high shrinkage yarn of the present invention is manufactured so as to increase the heat shrinkage by non-aqueous and dry heat shrinkage at 180 ° C. and at the same time, the maximum heat shrinkage stress is 120 ° C. or more, thereby minimizing loss of shrinkage characteristics due to sizing process temperature or tension, It has a unique shrinkage rate for each dyeing process, which not only improves work stability but also gives a rich touch to the product. More specifically, terephthalic acid and ethylene glycol are main components, but isophthalic acid is copolymerized in the range of 5 to 10 mol% of the total acid component and hexylene glycol in the range of 3 to 10% of the total glycol component, and the specific shrinkage rate is 20 to 50%. A latent multistage shrinkable high shrink polyester filament yarn having a dry heat shrinkage of 5 to 20% after non-water treatment was prepared. Isophthalic acid and hexylene glycol as copolymerization components that provide high shrinkage have properties of inhibiting crystallization of each component. Isophthalic acid has a bent structure during copolymerization and hexylene glycol has a bulky property in the side chain. It seems to play a role of suppressing crystallization, and when both copolymerization components are copolymerized at the above ratios, the shrinkage of properties is exerted depending on the treatment temperature.

The highly shrinkable polyester filament and the split polyester / polyamide composite fiber are manufactured from a biaxially blended blend fiber having 20 to 80 fibers / m by intermixing air with 1.0 to 4.0 kg / cm ^{2 of} high pressure air. When more than 80 pieces / m, monofilament of monofilament is generated a lot, and the mixing efficiency is lowered. When less than 20 pieces / m, the mixing efficiency is poor and the working efficiency in the sizing and weaving process is low.

In general, in the production of bi-shrink blended yarns, high shrinkage yarns use high filaments and short filaments in order to give unique shrinkage and unique texture to the fabric surface. There is a limit to the fineness of the low shrinkage yarns by selectively using according to the blending ratio of the blended yarns. In the present invention, the polyester / polyamide composite fibers are partially divided in the combusting process and at the same time in the conventional refining and dyeing process. It was possible to reduce the fineness of low-yield yarns by sikkim.

Polyester / polyamide composite fiber with short fiber fineness of about 2 denier is separated into 13 ~ 16 heterogeneous cross sections sequentially through the process of flamming, deburring, and dyeing, so that each ultrafine filament yarn with 0.1 ~ 0.2 denier The resulting ultra-fine filament yarns form a large number of fine projections on the fabric surface, which has a unique surface feel and bulkiness similar to that of natural silk. In addition, the high shrink yarn, a co-polyester-based polyester of the inner layer after dyeing, has a darker color than the ultrafine filament yarn of the outer layer, and exhibits an elegant and aesthetic color like natural silk. The repellency can be improved to produce a fabric having excellent drape.

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

The following examples and comparative examples illustrate the present invention more specifically, but do not limit the scope of the present invention.

Example 1

Volumetric ratio of nylon 6 with a relative viscosity of 2.6 in 25 ° C and 96% sulfuric acid as the first component, and polyethylene terephthalate (PET) as the second component in intrinsic viscosity 0.64 at 25 ° C in orochlorophenol Melt composite spinning was carried out at a ratio of 1: 3, and wound at a speed of 1,500 m / min to obtain a non-drawn yarn having a cross sectional shape similar to that of the second degree. The film was stretched three times at 130 ° C. and heat-set with a hot plate at 150 ° C. to obtain a 75 segment 36 filament multi segment composite fiber. The composite fiber was twisted to have a TPM (Twist / Meter) of 3000 at a combustion temperature of 170 ° C. to produce a mixed twisted yarn having a split ratio of about 30 to 40%. The high shrinkage yarn is composed of terephthalic acid and ethylene glycol as the main components, and isophthalic acid is added 7 mol% of the total acid component, hexylene glycol is added 7 mol% of the total glycol component, and copolymerized polyester chips having an intrinsic viscosity of 0.65 at 4O < 4 > After drying under reduced pressure for time, spinning was performed at a spinning speed of 3000 m / min by a nozzle having 12 circular cross sections to obtain POY (Pre of Parti-ally Oriented Yarn). The POY yarn was stretched 1.80 times under the condition of a heater roller at 90 ° C. and heat-treated at 125 ° C. to obtain 30 denier 12 filament yarns.

The heated composite fiber and the high shrink yarn were mixed with an air pressure of 2 kg / cm ³ to prepare a biaxially blended blend yarn having 40 fibers / m. Physical properties are shown in Table 1.

TABLE 1

* 1. The split ratio was expressed as a fraction of the number of separated oligomers relative to the total number of composite fibers by observing the cross section under a scanning microscope.

2.

(L ₀ : length of yarn, L ₁ : length of yarn after soft water treatment)

Example 2

Using the biaxially woven fiber produced in Example 1 as a light weft, a plain weave fabric having a density of 173 bones / in × 80 bones / in was woven. This was decanted in a pretreatment solution at 98 ° C. containing 4 g / l NaOH and 1 g / l nonionic surfactant for 20 minutes, heat-treated at 160 ° C. for 1 minute, and then dyed at 130 ° C. for 60 minutes. The obtained product was evaluated by the person skilled in the art for the feel and appearance of the fabric and the results are shown in Table 2.

Example 3

The same procedure as in Examples 1 and 2 was carried out except that 150 denier 48 filament twisted yarn having a TPM of 2200 was used as a weft yarn and 15% reduction in 98 ° C. hot water containing 4% sodium hydroxide after heat treatment at 160 ° C. for 1 minute. After weaving the fabric, the properties were measured and evaluated in the same manner as in Example 2, and are shown in Table 2.

Comparative Example 1

Except for using the biaxially woven fiber, which produced the twist of the composite fiber, was used as the weft and weft yarns. It is described in.

TABLE 2

1. The split rate was observed as a cross section of the scanning electron microscope, and expressed as the percentage of the number of segmented segments with respect to the total number of composite fibers.

2. The surface feel was determined by sensory evaluation of 10 experts.

(⊙: very flexible, ○: flexible)

3. Drape coefficient was measured by KSK 0815 (1986) 5. 21. E method.

4. The appearance was judged by sensory evaluation of 10 experts.

Claims (4)

Di-shrink blended yarn manufactured by blending polyester / polyamide composite fiber twisted yarn and highly shrinkable polyester filament yarn having a non-shrinkage ratio of 20-50% by air mixing method. The method of claim 1, wherein the polyester / polyamide composite fiber false-twist yarn has a split ratio of 20 to 50% by burning so as to have a combustion temperature of 150 ~ 190 ℃, TPM (Twist / Meter) 1900 ~ 3500 Hornsome Temple. The high shrink polyester filament yarn is copolymerized with terephthalic acid and ethylene glycol as main components, 5-10 mol% of isophthalic acid and 3-10 mol% of hexylene glycol in all glycol components. Diaxial horn sum yarn characterized in that it was made. The woven fabric characterized in that the biaxial blended yarn of claim 1 is used for warp and weft yarns.