KR940007692B1 - Process for preparation of different shrinkage mixed yarn having superior coloring property and having silk property - Google Patents

Abstract

The method is characterized by blending at least more than two kinds of fiber bundles of differential shrinkage, containing the inorganic microparticles of silica sol dispersed in ethylene glycol, whose light refraction rate is 1.3-1.8, average particle diameter is 150-500 nm, and input amount against the total copolymer component is 1.0-4.0 wt.%. Among the more than two fiber bundles, the high-shrinkage component is the polyester filament of the max. heat-shrinkage stress (τmax) of above 0.55 g/d, the heat-shrinkage stress at 180 deg.C (τ180 deg.C) of more than 0.3 g/d and less than Tmax, and the max. heat shrinkage stress producing temp. (τmax) of above 120 deg.C.

Description

Manufacturing method of silk-like shrinked blended yarn with excellent color development

The present invention relates to a method for producing a biaxial blended fiber having excellent color development and silk touch and gloss, and has two different kinds of shrinkages containing inorganic fine particles having an optical refractive index of 1.3 to 1.8 and an average particle diameter of 150 to 500 nm. By using the above-mentioned thread group, we can produce Isu shrink blended yarn, and weaving and dyeing using Isu blend blended yarn with warp and weft or warp yarn to produce excellent luster and bulkiness such as silk. It relates to a method for producing bishrink mixed fiber.

To date, various methods have been tried to give polyester fibers excellent color development, silky gloss and feel. For example, a method of releasing a cross section of a polyester yarn (Japanese Patent Application Laid-Open No. 50-63272). A method of using two-shrink blended yarn manufactured by blending two undrawn yarns under different heat treatment conditions and then mixing them. No. 56-140114) and a method by diaxial blending yarn composed of two modified polyester filaments, but lacking the feel of silk-like touch and gloss, and introducing inorganic particles into polyester to improve color development. There was a method (Japanese Patent Application Laid-Open No. 58-120816), but there was a lack in the unique texture of silk-like silk.

It is therefore an object of the present invention to provide a process for producing biaxial blended yarn for producing polyester fibers of excellent color development, gloss like silk and bulky touch.

In order to achieve the above object as well as another object that is easily expressed, in the present invention, the inorganic particles having a refractive index of 1.3 to 1.8 and an average particle diameter of 150 to 500 nm are added during the transesterification reaction when the highly shrinkable polyester filament is prepared and reacted. Non-shrinkage is 10-25%, the dry heat shrinkage is 7-16% at 180 ° C, the maximum heat shrinkage stress expression temperature (Tmax) is 120 ° C or more, the maximum heat shrinkage stress (τmax) is 0.55g / d or more, Low shrinkage stress prepared at the same method as conventional polyester filaments except that a high shrinkage polyester filament having a heat shrinkage stress at 180 ° C. (τ 180 ° C.) of 0.3 g / d or more and less than τ max and containing the above inorganic fine particles After mixing the polyester filament with the air mixing method to produce a bi-shrinkable polyester blend yarn, the blend yarn is used as a ramp or a warp yarn. After weaving by applying a conventional fabric treatment process color expression method is excellent and could be a pair of shiny silk and manufactured fabrics of fluffy and soft touch.

The present invention will be described in more detail as follows.

In the bi-shrink blended yarn of the present invention, a high shrinkable filament terephthalic acid and ethylene glycol are main components, 5-10 mol% of isophthalic acid and 3-10 mol% of hexylene glycol are mixed and transesterified with isophthalic acid. In the initial stage of the polycondensation reaction from the transesterification reaction, the inorganic fine particles having a refractive index of 1.3 to 1.8 and an average diameter of 150 to 500 nm are added in an amount of 1.0 to 4.0 parts by weight, more preferably 2.0 to 3.0 parts by weight based on the polymer. Obtain ester chips.

In the above process, when isophthalic acid is used in less than 5 mol% of the total acid component and hexylene glycol is less than 3 mol% in the total glycol component, the shrinkage expression of the bishrink mixed fiber manufactured from the highly shrinkable filament produced is not sufficient, and the isophthalic acid is computed. When 10 mole% of the component and hexylene glycol are used in excess of 10 mole% of the whole glycol component, the mechanical property degradation of the resulting high shrinkable filament is remarkable.

Inorganic fine particles used in the present invention include silica, calcium carbonate, kaolinite, etc., but it is preferable to use silica in consideration of particle size and dispersibility.

Since the refractive index of the polyester multifilament fiber is about 1.7 in the fiber axis direction and about 1.5 in the vertical direction, the refractive index of the added inorganic fine particles is useful to be similar to the refractive index of the fiber. When the refractive index of the inorganic fine particles is less than 1.3 or exceeds 1.8, the fiber The color development of this is lowered.

When the average particle diameter of the inorganic fine particles is less than 150 nm, the fine pores of the final fiber are formed small and the micro pores are easily covered by the processing agent. When the average diameter exceeds 500 nm, the pressure inside the spin pack is increased and the polyester is lost due to the unstretched yarn. Refinement is impossible.

In addition, when the added amount of the fine particles is less than 1.0 parts by weight, small irregularities are generated on the surface of the fiber, so that the color development property is insignificant, and when the amount of the fine particles is more than 4.0 parts by weight, the mechanical properties of the polyester fiber are lowered, which causes a pressure increase during spinning. .

The resultant polyester chips were spun at 3,000 to 3,500 m / min to form partially drawn yarns (POY), which were stretched at a stretching temperature of at least 75 ° C, preferably at 80 ° C to 95 ° C, and at a draw ratio of 80 to 90%. After the refractive index (Δη) is 160 × 10 ^-3 or more, heat treatment is performed at a temperature of 120 ° C. or higher to obtain a non-export ratio of 10 to 25%, a dry heat shrinkage ratio after non-shrink treatment of 7 to 16% at 180 ° C., and a filament of 20 The maximum heat shrinkage stress expression temperature (Tmax) at the time of heating and heating at ℃ / min is 120 ° C or more, the maximum heat shrinkage stress (τmax) is 0.55g / d or more, and the heat shrinkage stress (τ180 ° C) at 180 ° C is τmax> 180 ° C. A highly shrinkable polyester filament of ≧ 0.3 g / d is produced.

If the stretching temperature is less than 75 ° C., even if the non-shrinkage rate is high, the dry heat shrinkage rate after the non-shrinkage is not sufficient, and shrinkage occurs unevenly.

In addition, when weaving a highly shrinkable polyester filament having a non-shrinkage ratio of less than 10% with a non-shrinkable polyester filament mixed with a low shrinkage polyester filament, the shrinkage does not occur sufficiently, resulting in a lack of silk-like touch and a non-shrinkage rate of 25%. If exceeded, the mechanical strength of the filament is severely reduced.

When weaving high shrinkage polyester filament with dry shrinkage rate of less than 7% with diaxial blending yarn mixed with low shrinkage polyester filament, sufficient shrinkage does not develop during dry heat treatment after squeezing the dough, which makes the final fabric feel poor. When the thermal contraction rate of 180 ° C. exceeds 16%, the mechanical properties of the highly shrinkable polyester filament are severely reduced. The heat shrink stress is a property that determines the degree of shrinkage of the filament yarn or fabric under tension, and the higher the heat shrink stress, the stronger the shrinkage. Therefore, the maximum heat shrink stress (τmax) is 0.55 g / d or more, and the maximum heat shrink stress is expressed. It is possible to weave fabrics that exhibit a rich touch by sizing the biaxially blended yarn using high shrinkage polyester filament having a temperature of 120 ° C. or more, minimizing shrinkage loss due to tension, and expressing unique shrinkage by refining and dyeing processes. The conventional low shrinkage polyester filaments containing the same inorganic fine particles as the high shrinkage polyester filaments containing the produced inorganic fine particles are mixed with air to prepare a biaxial shrink blending yarn, and the resulting biaxial shrink blending yarn is warped and wefted. Or by using a warp after weaving and dyeing to produce a fabric having excellent color development and silk-like unique luster and feel.

The following examples and comparative examples illustrate the invention in more detail, but do not limit the invention.

Example 1

When terephthalic acid and ethylene glycol are the main components and isophthalic acid is mixed with 7 mol% of the total acid component and hexylene glycol 7 mol% of the whole glycol component, the copolymer has a photorefractive index of 1.6 and average dispersed in ethylene glycol during the transesterification reaction. 3.0 parts by weight of silica sol having a particle diameter of 300 nm was added to obtain a polyester chip having an intrinsic viscosity of 0.65.

The chip was dried under reduced pressure at 160 ° C. for 4 hours, and then spun at a speed of 3000 m / min using a nozzle having 12 Y cross sections to obtain partially drawn yarn, which was drawn at 1.80 times in a heater roller at 90 ° C., and then at 125 ° C. After heat treatment, the non-shrinkage rate, dry shrinkage rate after non-shrinkage (180 ° C.), maximum heat shrinkage stress expression temperature, maximum heat shrinkage stress, and heat shrinkage stress at 180 ° C. were measured and shown in Table 1.

In addition, except that 3.0 parts by weight of the same silica sol as in the manufacture of the highly shrinkable polyester filament was prepared, a Y-sided low shrinkable polyester filament (non-shrinkage ratio of 8%) of 75 denier / 36 filaments was prepared by a conventional method. It is mixed with the highly shrinkable polyester filament and the conventional air mixing method to produce a biaxially blended yarn, and the flat yarn of 150 threads / in × 70 sheets / in is made by using the diaxially blended yarn as a ramp and 75 denia / 36 filament polyester as the weft yarn. Manufacture fabrics. After the dough is subjected to the scouring, heat treatment is performed at 180 ° C., and 20% is reduced in sodium hydroxide hot water, and the salt is processed to prepare a final fabric. The color development of the final fabric and the texture of the fabric were evaluated and shown in Table 1.

Example 2

Except that the addition of 1.5 parts by weight of silica sol in the production of high shrink polyester filament was carried out in the same manner as in Example 1. The properties of the high shrink polyester filament and the final fabric was evaluated and the results are shown in Table 1.

Comparative Example 1

The same procedure as in Example 1 was conducted except that no silica sol was added to prepare the highly shrinkable polyester filament. The properties of the highly shrinkable polyester filament and the final fabric were evaluated.

Comparative Example 2

Except for producing a highly shrinkable polyester filament with 4 mole% of isophthalic acid and 2 mole% of hexylene glycol as a total glycol component, the same procedure as in Example 1 was carried out. The physical properties were evaluated and the results are shown in Table 1.

Comparative Example 3

The same procedure as in Example 1 was conducted except that a highly shrinkable polyester filament was prepared using isophthalic acid as 11 mol% of the total acid component and hexylene glycol as 11 mol% of the total glycol component. The physical properties were evaluated and the results are shown in Table 1.

[Comparative Example 4]

The partially stretched yarn was heated in a heater roller at 70 ° C. to prepare a highly shrinkable polyester filament, and was subjected to the same procedure as in Example 1. The properties of the highly shrinkable polyester filament and the final fabric were evaluated, and the results are shown in Table 1. It was.

[Comparative Example 5]

The partially stretched yarn was drawn 1.80 times under the heater roller at 90 ° C. and heat-treated at 90 ° C. to produce a highly shrinkable polyester filament, and was subjected to the same procedure as in Example 1, and the properties of the high shrinkable polyester filament and the final fabric were evaluated. The results are shown in Table 1.

Example 3

Silica having an average particle diameter of 300 nm dispersed in ethylene glycol during the transesterification reaction when copolymerizing with terephthalic acid and ethylene glycol as main components, isophthalic acid mixed with 9 mol% of the total acid component and hexylene glycol with 5 mol% of the total glycol component. 3.0 parts by weight of sol was added to obtain a copolymerized polyester chip having an intrinsic viscosity of 0.68. The chip was dried under reduced pressure at 160 ° C. for 4 hours, and then spun at a spinning speed of 3200 m / min with a nozzle having a Y cross section to produce partially drawn yarn, which was drawn 1.82 times under the condition of a heater roller of 85 ° C. Maximum elongation of 2.18 times) and heat-treated at a temperature of 120 ° C., except that a highly shrinkable polyester filament of 30 denier / 12 filaments was prepared, and was carried out in the same manner as in Example 1. The properties of the highly shrinkable polyester filament and the final fabric were evaluated. The results are shown in Table 1.

TABLE 1

Here, IPA: isophthalic acid

HG: Hexylene Glycol

Tmax: Maximum heat shrinkage stress temperature (℃)

τmax: Maximum heat shrinkage stress (g / d)

τ180 ℃: Heat shrinkage stress at 180 ℃ (g / d)

[** Property Evaluation Method **]

Non-shrinkage rate: Skein shrinkage evaluation method of KSK 0125

Dry heat shrinkage rate after non-shrinkage: Skew rate evaluation method of KSK 0125

Maximum heat shrinkage stress temperature (Tmax): Thermal stress measuring device (Kanebo Engineering Co., Ltd.)

Maximum heat shrinkage stress (τmax): Thermal stress measuring device (manufactured by Kanebo Engineering, Japan)

Thermal shrinkage stress at 180 ° C (τ180 ° C): Thermal stress measuring device (manufactured by Kanebo Engineering, Japan)

Color development and bulkiness: evaluated by the sensuality of 10 skilled in the art (○: good, ▲: somewhat good, ×: poor)

Drape factor: KSK 0815 knitting test method

Claims (3)

It contains inorganic fine particles with a refractive index of 1.3 to 1.8 and an average particle diameter of 150 to 500 nm, and is mixed with at least two kinds of yarns having different heat shrinkage properties, but has a maximum shrinkage stress (τmax) of 0.55 g / more than d, heat shrinkage stress at 180 ° C (τ180 ° C) is 0.3g / d or more, less than τmax, the maximum heat shrinkage stress expression temperature (Tmax) 120 ℃ or more, characterized in that the use of silk Manufacturing method of the mixed yarn. The method of claim 1, wherein the inorganic fine particles are silica sol dispersed in ethylene glycol, and the input amount is 1.0 to 4.0 parts by weight of the total copolymerization component. The method of claim 1, wherein the highly shrinkable polyester filament is copolymerized with terephthalic acid and ethylene glycol as main components, 5-10 mol% of isophthalic acid and 3-10 mol% of hexylene glycol as a total glycol component. Coarse polyester chips obtained by adding inorganic fine particles at any time were spun at a rate of 3,000 to 3,500 m / min to obtain partially drawn yarns, and then maintained at a temperature of 75 ° C. or higher to 80 to 90% of the maximum draw ratio. A process for producing silk-like shrinkage blended yarn with excellent color development, characterized by stretching and heat treatment at a temperature of 120 ° C. or higher.