KR20060098122A - Polyester composition for preparing yarn having a high gloss and yarn having a high gloss thereby - Google Patents

Abstract

The present invention is a polyester composition for producing a high gloss yarn, characterized in that it contains 0.05 to 1.0 parts by weight of barium sulfate particles having an average particle diameter of 0.01 ~ 3㎛ with respect to 100 parts by weight of the acid component of dicarboxylic acid or derivatives thereof. Provides a high gloss yarn.

The polyester composition for producing a high gloss yarn according to the present invention has solved problems such as stretching unevenness and the occurrence of loops in the final product, and at the same time has excellent transparency and high glossiness.

Average particle diameter, barium sulfate, polyester, high gloss.

Description

Polyester composition for preparing yarn having a high gloss and yarn having a high gloss thereby}

The present invention relates to a polyester composition for producing a high gloss yarn and a high gloss yarn prepared therefrom.

Typically, a high gloss yarn-use polyester composition is usually prepared without adding any particles or containing a very small amount of particles to impart high gloss.

However, when spinning the polyester composition prepared in this way, projections on the surface of the yarn are not formed properly, the running performance with the roll rotating at high speed in the spinning process is insufficient, frictional force is increased, uneven stretching or winding the yarn There was a problem such as the occurrence of loops on one drum.

In order to solve this problem, a high gloss yarn is manufactured by melt spinning a polyester composition containing a small amount of particles within a range that does not impair high glossiness, but there has been a limit as a fundamental solution to the problem.

In order to solve the draw nonuniformity and the problem of the occurrence of loops on the drum, it is necessary to form a certain amount of protrusions on the surface of the yarn. However, when the addition amount of particle | grains increases, the problem that the high glossiness of a yarn falls will arise.

Accordingly, an object of the present invention is to provide a polyester composition suitable for yarn production having high glossiness and a high gloss yarn prepared therefrom while solving the above problems.

In order to achieve the above object, the present invention provides a polyester composition for producing a high gloss yarn, characterized in that it contains barium sulfate particles having an average particle diameter of 0.01 ~ 3㎛.

It also provides a high gloss yarn made of the polyester composition.

Specifically, the present invention is a polyester composition for producing a high gloss yarn, characterized in that the barium sulfate particles having an average particle diameter of 0.01 ~ 3㎛ containing 0.05 to 1.0 parts by weight based on 100 parts by weight of the acid component of the dicarboxylic acid or derivatives thereof. It provides a high gloss yarn made of the polyester composition.

Hereinafter, the present invention will be described in detail.

It is preferable that the average particle diameter of the barium sulfate particle used for this invention is 0.01-3 micrometers, More preferably, it is 0.05-1.0 micrometer.

If the average particle diameter of the barium sulfate particles exceeds 3㎛ may cause a problem of gloss degradation due to diffused reflection of light due to the generation of large projections on the surface of the yarn, while less than 0.01㎛ the projections on the surface of the yarn is not formed properly when Stretch non-uniformity and loop-prone problems can occur.

The refractive index of the barium sulfate particles used in the present invention may be somewhat changed by the properties of the particles, the crystal structure and the addition of other components, for example, coating of the surface of the particles with alumina or silica, but similar to polyester 1.50. It is in the range of 1.65. Such barium sulfate particles can maintain transparency even if a relatively large amount is added because their refractive index is similar to that of polyester.

In addition, as a result of the increase in the number of yarn surface protrusions due to particle injection, problems such as the stretching nonuniformity and the occurrence of loops may be solved.

It is preferable that the polyester composition of this invention contains 0.05-1.0 weight part of barium sulfate particle with respect to 100 weight part of acid components which are dicarboxylic acid or its derivative (s). When the content of the barium sulfate particles exceeds 1.0 parts by weight, it is difficult to impart high gloss to the yarns, and when the particle content is less than 0.05 parts by weight, the number of fine protrusions on the surface of the yarns is reduced to solve the problem of elongation irregularities and loops. This is difficult.

In order to obtain a polyester composition containing inorganic particles such as barium sulfate, a method such as a polymerization method or a kneading method may be used, but it is preferable to prepare by the polymerization method in order to achieve the object of the present invention.

In addition, there is no restriction in the method and order of adding the particles, but it is preferable that the particles are dispersed and added to the glycol component. The timing of adding the particles is not limited at the end of the reaction, but is preferably added at the end of the transesterification or esterification reaction.

Barium sulfate particles used in the present invention are inorganic coatings on the surface of the particles, such as alumina and silica in order to reduce the generation of voids due to lack of affinity with the polyester within the range that does not interfere with the object of the present invention You may use it after advancing a process.

There is no restriction on the properties of the barium sulfate particles used in the present invention, but it is preferable that they are spherical.

The particle | grains used by this invention are anionic surfactants, such as (i) sodium dodecylbenzene sulfonate, sodium lauryl sulfate, and formalin condensate salt of naphthalene sulfonic acid in the range which does not impair the effect of this invention; (Ii) nonionic surfactants such as polyoxyphenol ether and polyethylene glycol monostearate; (Iii) water-soluble synthetic polymers such as polyvinyl alcohol, polyvinylpyrrolidone and polyethylene glycol; (Iii) water-soluble natural polymers such as gelatin and starch; (Iii) water-soluble semisynthetic polymers such as carboxymethyl cellulose and / or (iii) silane-based or titanium-based coupling agents and polyphosphates. In addition, the barium sulfate particles may be subjected to a process such as normal particle dispersion, classification using a mill, removal of coarse particles using centrifugal separation, or the like before input. However, the present invention does not specifically limit the method of pretreatment of the barium sulfate particles before addition.

The polyester of the present invention is obtained by condensation reaction of an acid component which is a dicarboxylic acid or a derivative thereof and a glycol component, and a 2,6-naphthalate structure can be copolymerized.

The acid component which is the dicarboxylic acid or a derivative thereof is terephthalic acid, naphthalene dicarboxylic acid and derivatives thereof and the like, and isophthalic acid, phthalic acid, adipic acid, sebacic acid and derivatives thereof may be copolymerized in small amounts.

As the glycol component, ethylene glycol, propylene glycol, butanediol, 1,4-cyclohexanedimethanol, neopentylglycol and the like may be selected, and these may be copolymerized in small amounts. In particular, ethylene glycol is preferable.

In the polyester composition of the present invention, a thermal stabilizer, a UV stabilizer, an antioxidant, a dye, an antistatic agent and the like may be contained in an appropriate amount or copolymerized as necessary.

The spinning method of the high gloss yarn manufactured in the present invention has no limitations such as the conventional spin draw (SDY) method and the conventional POY (partially stretched) system, but especially when manufactured with a hot tube system (HPS), it exhibits excellent high glossiness. It is characterized by.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the following examples are merely illustrative as specific embodiments of the present invention and should not be understood as limiting the scope of the present invention.

Example 1

64 parts by weight of ethylene glycol, 0.8 parts by weight of magnesium acetate and 0.3 parts by weight of antimony oxide were placed in a reaction tube with respect to 100 parts by weight of dimethyl terephthalate, and the ester exchange reaction was carried out while the temperature was raised from 140 ° C to 230 ° C.

Then, 0.5 parts by weight of trimethyl phosphate was added, and after 20 minutes, 0.2 parts by weight of spherical barium sulfate particles having an average particle diameter of 0.4 μm was added thereto. Thereafter, the pressure was increased while gradually increasing the temperature from 230 ° C to 280 ° C for 1 hour. Then, the polymerization reaction was carried out at 280 ° C. under high vacuum for 2 hours, and then discharged and cut to obtain a polyester composition according to the present invention.

The polyester composition thus obtained was dried under high vacuum at 160 ° C. for 5 hours, and then spun at 293 ° C. with a spinning system to wind 75 denier 24 filament yarns at a speed of 5300 m / min for the first gothic roll. At this time, the non-contact radiant heat treatment section temperature was set to 130 ° C. Thus, the polyester yarn according to the present invention was produced.

Comparative Example 1

Except not adding the barium sulfate particles, a polyester composition was prepared in the same manner as in Example 1, and spun this to prepare a polyester yarn according to the present invention.

Comparative Example 2

A polyester composition was prepared in the same manner as in Example 1, except that 0.2 part by weight of titanium oxide particles were used instead of the barium sulfate particles, and a polyester yarn was prepared by spinning.

Comparative Example 3

A polyester composition was prepared in the same manner as in Example 1, except that 0.02 parts by weight of titanium oxide particles were used instead of the barium sulfate particles, thereby spinning a polyester yarn.

Physical property evaluation

Physical properties of the polyester composition and the polyester yarn obtained from Example 1 and Comparative Examples 1 to 3 were measured as follows, and the results are shown in Table 1 below.

(1) Average particle size of particles:

Analysis was performed using a laser particle size analyzer LS-13320 manufactured by Beckman Couter.

(2) transparency of the polyester composition

After dissolving 3.25 g of the prepared polyester composition in 25 ml of phenol and tetrachloroethane 1: 1 solvent, haze was measured using a 1001DP machine manufactured by Denshoku Kogyo Co., Ltd., Japan. When haze value was 20% or less, it was favorable, and when 20% or more was judged impossible.

(3) Number of occurrences of loop of product (drum)

The number of loops of 10 loops obtained by winding the polyester yarn prepared above in 1000 m units was examined to determine that the loop yarn was not used when an average of 1.0 or more loops were generated.

Property evaluation result division Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Average particle diameter 0.4 μm - 0.3 μm 0.3 μm Refractive index 1.54 - 2.55 2.55 Transparency (Haze) Good (10.5%) Good (0.1%) Poor (95%) Poor (45%) Number of loop occurrences (judgment) 0.5 pieces (available) 1.7 pieces (not available) 0.5 pieces (available) 1.2 pieces (not available)

The polyester composition for producing a high gloss yarn according to the present invention has solved problems such as stretching unevenness and the occurrence of loops in the final product, and at the same time has excellent transparency and high glossiness.

The present invention also provides a high gloss yarn made from the polyester composition.

Claims (5)

A polyester composition for producing a high gloss yarn, characterized by containing 0.05 to 1.0 parts by weight of barium sulfate particles having an average particle diameter of 0.01 to 3 µm with respect to 100 parts by weight of an acid component which is a dicarboxylic acid or a derivative thereof. 2. The polyester composition for producing a high gloss yarn according to claim 1, wherein the average particle diameter of the barium sulfate particles is 0.05 to 1.0 mu m. The polyester composition for producing a high gloss yarn according to claim 1, wherein the barium sulfate particles are spherical. The polyester composition for producing a high gloss yarn according to claim 1, wherein the dicarboxylic acid is terephthalic acid or naphthalene dicarboxylic acid. A high gloss yarn made from the polyester composition of claim 1 inherent.