KR0131837B1 - Manufacturing method of polyester conjugated fiber for artificial hair - Google Patents

Abstract

The invention offers a method for manufacturing multifilament for artificial hair. Polyester copolymer (B) is produced from a mixing compound as a general form (I) and organic sulfone acid metallic salts to common polyester polymer (A) as a core component during polymerization. It is fused and mixed with polyester polymer (A), producing mixed polymer (C); then this polymer as an initial component is extracted and alkalified producing polyester multifilament for artificial hair which is used as a grey yarn for toupees, fashion wigs or wigs like natural hair.

Description

Manufacturing method of polyester composite fiber for artificial hair

The present invention relates to a method for producing a polyester composite fiber for artificial hair, and more particularly, in the process of polymerizing a polyester by adding a conventional polyester polymer (A) as a core component and adding a eutectic acid metal salt. Alkali after complex spinning using a mixed polyester polymer (C) prepared by melting and mixing a polyester copolymer (B) and a polyester polymer (A) prepared by adding a compound represented by formula (I) The present invention relates to a polyester composite fiber which can be used as a yarn for partial wigs, fashion wigs or full wigs by imparting properties such as natural hair to absorbency, color depth, matting effect, and the like.

Here, R 'is a hydrogen atom or an ester-forming derivative, and R' 'is a trivalent aromatic hydrocarbon or trivalent aliphatic hydrocarbon group.

Artificial hair materials require several properties along with appropriate mechanical properties. When bathing, sauna, sunlight, etc., artificially imparted curls and waves, the wig shows a completely different appearance. Therefore, heat setting and shape durability are required. In order to prevent inverse hair phenomenon and the like, proper drape and hygroscopicity are required, and various characteristics such as chromaticity close to natural hair are required.

The use of polyvinyl chloride-based polymers as a material for conventional artificial hair has low fiber strength and limits color expression during color impartment due to fragile physical properties such as entanglement and breakage of fibers during hairdressing after wave treatment. And a polyester-based composite fiber for artificial hair having light reflection on the surface of the fiber and capable of maintaining thermal durability, form stability, and the like due to the polyester component of the core portion.

The present invention is described in more detail as follows.

The polyester composite fiber of the present invention is prepared by adding a compound represented by the following general formula (I) to a process of polymerizing a polyester by adding a conventional polyester polymer (A) as a core component and adding a eutectic acid metal salt. The composite polyester polymer (C) produced by melting and mixing a polyester copolymer (B) and a normal polyester polymer (A) was used as a primary component, and was manufactured by complex spinning after alkali processing.

Here, R 'is a hydrogen atom or an ester-forming derivative, and R' 'is a trivalent aromatic hydrocarbon or trivalent aliphatic hydrocarbon group.

The polyester polymer (A) of the present invention is conventionally composed of an acid component composed of one or more aromatic dicarboxylic acids or ester-forming derivatives thereof and one or more alkylene glycols or ester-formers thereof having 2 to 6 carbon atoms. Polyester copolymer.

Examples of the general formula (I) compound include phthalic anhydride, trimethyl lythian hydride and the like. At this time, the amount used was 0.01 to 5% by weight relative to the polyester copolymer (B), and if the amount was less than 0.01% by weight, satisfactory intrinsic viscosity of the polyester copolymer (B) could not be obtained and 5% by weight. If it is more than%, the fiber formability and physical properties were lowered.

In addition, as the eutectic acid metal salt used in the present invention, sodium 3,5-di (carbomethoxy) benzenesulfonate, potassium 3,5-di (carbomethoxy) benzenesulfonate, sodium 1,5-di (carbo) Methoxy) naphthalene 3-sulfonate and the like.

The copolyester (B) copolymerized with the metal salt of the eutectic fonate affects the size, distribution, shape, etc. of the micropore recesses formed on the fiber surface when the composite fiber is subjected to the surface elution treatment with an aqueous alkali solution. In addition, the smaller the difference in intrinsic viscosity between the polyester polymer (A) and the polyester copolymer (B) used in the preparation of the mixed polyester polymer (C), the better the fiber properties, and the hygroscopicity, matting effect, deep color, etc. The effect is also good.

The spinneret used in the present invention used a conventional sheath type complex spinneret, and the nozzle was used with a diameter of Φ 0.5 mm, the number of airborne 12.

The polyester composite fiber was spun to have an area of 15 to 40% of the area of the fiber section. If the ratio of the area is less than 15%, the fiber properties such as the support of the core are excellent. There is a shortage, and in excess of 40%, the physical properties of the fiber are reduced.

Considering that the thickness of the natural hair is about 50 to 90 micrometers, the composite fiber for artificial hair was prepared with 30 to 80 deniers having the same fineness as the natural hair. However, in general air-cooled spinning methods such as cooling, stretching, and winding fibers, the workability is poor and the required physical properties cannot be satisfied. Thus, the present invention uses a water-cooled spinning method for monofilaments.

That is, after the fiber is discharged from the nozzle hole, it is uniformly cooled by passing a water cooling bath having a water temperature of about 80 ° C. installed at the lower part of the cell at a predetermined distance, and then through a preheating part heated by high temperature steam. It could be stretched and made into a fiber having satisfactory physical properties.

The polyester monofilament for artificial hair prepared as described above has a diameter of 01. to 0.5 microns, more preferably 0.1 to 0.2 microns, randomly distributed in the axial direction on the surface of the fiber by processing with an alkali-based compound. A ball is formed. If the size of the surface micropore is less than 0.1 micro, the matting effect close to natural hair is weak. If the surface micropore is more than 0.5 micro, the gloss close to the natural hair cannot be obtained.

As the alkali compound, sodium hydroxide, potassium hydroxide, or the like can be used, and the concentration of the treatment solution and the treatment time depend on the conditions for producing the fiber. Conventional alkali reduction is carried out in the range of 5 to 30% by weight of the fiber weight.

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

Example 1

In polymerizing the polyester copolymer (B), 246 parts of terephthalic acid, 165 parts of ethylene glycol, 44 parts of sodium 3,5-di (carbomethoxy) benzenesulfonate, 5.7 parts of trimethyltic anhydride, 0.18 parts of sodium acetate, 0.02 parts of zinc acetate was added thereto, and after the transesterification reaction, water of theoretical amount was liberated, and 0.1 parts of antimony trioxide polymerization catalyst was mixed and added to carry out polycondensation. The polycondensation was polymerized under a high vacuum at 280 ° C. for about 120 minutes, and the final pressure was 0.2 mmHg. At this time, the intrinsic viscosity of the copolymer (B) was 0.56 melting point.

This copolymer was mixed with a conventional polyester polymer (A) having an intrinsic viscosity of 0.6 with a mixing weight ratio of 20:80 on a pellet and then dried at 140 ° C. for at least 5 hours to use as a mixed polymer (C). .

Spinning of the fibers was carried out using a deep sheath-type spun spinneret, spinning temperature was 280 ° C, and the nozzle was used with a pore size of 0.5ψ and a number of twelve. As a core component, it used as the normal polyester polymer (A) of intrinsic precision 0.6, and the mixed polymer (C) obtained by the said method was used as a supercomponent. The composite ratio of the vinegar component was 70/30 (core / second), the temperature of the water cooling bath was adjusted to 75-80 ° C, and the draw ratio was the draw ratio (3.80) which can be worked up to wind each fiber separately to obtain a fineness of 60 deniers. A deep sheath composite monofilament was obtained.

In order to form the surface micropores of the monofilament, alkali was reduced for about 15 minutes at the boiling point temperature of 1.0% aqueous sodium hydroxide solution, dried and observed under a microscope. As a result, the microfibers had an average diameter of 0.15 microns on the fiber surface in the fiber axis direction. Co-production distribution could be confirmed, and dyeing degree and surface gloss after dyeing for artificial hair were determined visually after dyeing under normal dyeing processing conditions. Table 1 shows the physical properties and performance evaluation results of the monofilament prepared by composite spinning before and after loss.

Example 2

The synthesis of the polyester copolymer (B) of Example 1 was carried out in the same manner, except that 11.2 parts of phthalic anhydride was added instead of trimethyltic anhydride, and the inherent viscosity of the copolymer was 0.58.

Hereinafter, a monofilament having a fineness of 50 denier was prepared in the same manner as in Example 1, and the results are shown in Table 1.

EXAMPLES 3-4

Except for the addition of 6.8 parts and 10.4 parts of phthalic anhydride instead of trimethyltic anhydride in the synthesis conditions of the polyester copolymer of Example 1, the operation was performed in the same manner, and the inherent viscosity of the copolymer was 0.55 and 0.57. It was.

Hereinafter, monofilaments having a fineness of 40 denier were prepared in the same manner as in Example 1, and the results are shown in Table 1.

[Examples 5 to 6]

In Example 1, it was carried out under the same conditions as in Example 1, except that the composite ratio of the edible components at the time of complex spinning was set to 80/20 and 60/40, respectively, and the results are shown in Table 1.

Comparative Example 1

In the polymerization conditions of the copolymer (B) of Example 1, the polymerization was carried out in the same manner as in Example 1 without addition of trimethyl aryhydride, and the inherent viscosity of the copolymer was 0.41. Hereinafter, the results are shown in Table 1 in the same manner as in Example 1.

Comparative Example 2

In Example 1, it was carried out under the same conditions as in Example 1, except that the composite ratio of the vinegar component at the time of complex spinning was set to 50/50 and 90/10, respectively, and the results are shown in Table 1.

However, the degree of dyeing and surface gloss were judged to be good (○), normal (△), and poor (×) as compared with natural hair with the naked eye. In comprehensive evaluation, the physical properties of the fiber and the surface effect were taken into consideration. It evaluated as good ((circle)), normal ((triangle | delta)), and bad (x).

As shown in Table 1, the effect of the present invention can be recognized by the strength of the monofilament before and after the weight loss (fibrous material) and the average diameter of the surface micropores. In comparison, not only the strength decrease before and after the loss, but also because the average diameter of the surface micropores is small or large, effects such as dyeability and surface gloss are inadequate. That is, in the case of Comparative Example 1, the physical properties were significantly decreased after the weight loss. Note 3 In the case of the small average surface diameter of the micropore, the surface tension was poor, so that the matting effect was minimal, and the average diameter was too large. In this case, it was not possible to obtain gloss close to natural hair.

Claims (3)

A polyester ordinary copolymer (B) prepared by adding a compound represented by the general formula (I) to a process of polymerizing a polyester by adding a conventional polyester polymer (A) as a core component and adding a eutectic acid metal salt. And a mixed polyester polymer (C) prepared by melting and mixing a polyester polymer (A) as a primary component, followed by alkali processing after composite spinning, wherein the polyester composite fiber for artificial hair is manufactured. Here, R 'is a hydrogen atom or an acetate forming derivative, and R' 'is a trivalent aromatic hydrocarbon or trivalent aliphatic hydrocarbon group. The method according to claim 1, wherein the amount of the general formula (I) is 0.01 to 5% by weight based on the polyester copolymer (B). The method of manufacturing a polyester composite fiber for artificial hair according to claim 1, wherein the area of the initial portion of the composite fiber is spun to have a ratio of 15 to 40% with respect to the fiber cross section.