KR960011592B1 - Anti-static polyester fiber - Google Patents

Abstract

The invention relates to the polyester sheath-core composite fiber comprising: (A) A sheath-application copolymer prepared by adding 3 to 10 wt. % of polyethylene glycol with a average molecular weight of 400 to 4,000 during the transesterification reaction of polymerization process of polyester generated from diol and dicarbonic acid or ester compound thereof; (B) A core-application copolymer prepared by adding 0.5 to 2 wt. % of low molecular weight phosphoric ester salt of the following formula (I) during the copolymerization reaction of polyester generated from diol and dicarbonic acid or ester compound thereof. The formula (I) is CmH2m+1 -O-(CH2CH2O)n -PO3Na2 where m represents an integral number of 1 to 9, and n is an integral number of 1 to 10.

Description

            Antistatic Polyester Fiber         

The accompanying drawings are schematic cross-sectional views of the present invention cis-core composite fiber.

* Explanation of symbols for main parts of the drawings

S: Sheath C: Core

The present invention relates to an antistatic polyester fiber, more specifically, a sheath polyester copolymerized with polyethylene glycol, a hygroscopic material.                 The present invention relates to an antistatic polyester fiber composed of a polyester polymer for cores obtained by copolymerizing a polymer and a phosphate ester salt which is an ionic substance.

Principles of manufacture of polyester electrostatic yarn currently widely used are as follows.

First, the method of raising the equilibrium moisture content of the fiber by adding a hygroscopic material such as polyethylene glycol, and second, the static electricity generated by adding the low molecular weight ionic material.                 How to leak.

For example, as the first method, there are Japanese special public offices 39-5214, 44-31828, etc., and the Japanese special public office as a method combining the first and second methods.                 47-11280, 47-10246, etc.

However, these methods have a high content of an antistatic agent to exhibit sufficient antistatic properties and have a disadvantage in that polyethylene glycol is released from salt processing.

In addition, the sacrificial process has a disadvantage.

Accordingly, in the present invention, polyethylene glycol is added to the polyester polymer main chain for the sheath in order to prevent the antistatic agent from escaping from the fiber during the salt processing process or during use.                 The polyester fiber was copolymerized and only the polyester polymer for core was added to prepare polyester fiber having excellent antistatic property and durability.

Hereinafter, the present invention will be described in detail.

The present invention is a polyester sheath-core (core) composite fiber, polyester produced from diol and dicarboxylic acid or ester compounds thereof                 Sheath copolymer (S) prepared by incorporating 3 to 10% by weight of polyethylene glycol having an average molecular weight of 400 to 4,000 in the esterification exchange reaction of the polymerization step,                 The low molecular weight phosphate ester salt represented by the following formula (I) during the polycondensation reaction of the polyester polymerization step produced from diol and dicarboxylic acid or ester compound thereof                 An antistatic polyester fiber comprising a copolymer for core (C) prepared by adding 0.5 to 2% by weight.

C _m H _{2m + 1} -O- (CH ₂ CH ₂ O) _n -PO ₃ Na ₂ (Ⅰ)

In said formula, m is an integer of 1-9, n is an integer of 1-10.

Hereinafter, the present invention will be described in more detail.

In the present invention, when the molecular weight of the polyethylene glycol added during the transesterification reaction of the polymer for the sheath is less than 400, it is liable to volatilize during the reaction.                 If exceeded, the reactivity becomes poor.

If the added amount is less than 3% by weight, the antistatic property is insufficient, and if it exceeds 10% by weight, the spinning process is poor.

Phosphate ester salt added during the polycondensation reaction in the polymerization process of the core polymer has no effect when the addition amount is less than 0.5% by weight, and when it exceeds 2% by weight, the dyeability, etc.                 It becomes bad.

In the present invention, when the cis-core composite spinning using the cis and core polymers, the melt viscosity of the cis polymer and the core polymer should be similarly adjusted, and the sacrificial property is good.                 Their area ratio must also be balanced to improve sacrificiality.

Usually, polymers containing polyethyleneglycol have lower melt viscosity at the same intrinsic viscosity than they do not. In the present invention, the difference in intrinsic viscosity of the sheath and core                 The sacrificial processability was the best when the ratio was 0.03 to 0.05 and the area ratio was 40:60 to 60:40.

The fiber of the present invention prepared in this way can be used for general lining, women's blouse, dress and car seat.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by Examples.

In Examples and Comparative Examples, parts means parts by weight.

Example 1

(A) Cisbu Polymer Preparation:

100 parts of dimethyl terephthalic acid, 60 parts of ethylene glycol, 4 parts of polyethylene glycol having an average molecular weight of 1,000 and 0.03 parts of acetate acetate were placed in a reactor equipped with a condenser.                 Methanol was completely distilled off while heating up to 250 degreeC over 2 hours, and it transesterified. 0.01 parts of phosphoric acid and titanium dioxide after transesterification                 0.4 parts and 0.035 parts of antimony trioxide were added and stirred for 10 minutes. After 20 minutes of low vacuum reaction, a high vacuum reaction of 1 mmHg or less was performed at 285 ° C. for 1 hour and 30 minutes.                 After making a chip having an intrinsic viscosity of 0.67.

(B) Coabu polymer preparation:

100 parts of dimethyl terephthalic acid, 60 parts of ethylene glycol, and 0.03 parts of acetate acetate were placed in a reactor equipped with a condenser, and methanol was heated to 250 ° C. over 2 hours.                 Completely distillate to undergo transesterification. When the transesterification reaction is completed, add 0.01 part phosphoric acid, 0.4 part titanium dioxide, and 0.035 part antimony trioxide.                 After further stirring for 10 minutes, the low vacuum reaction was performed for 20 minutes, and the high vacuum reaction of 1 mmHg or less was performed for 1 hour and 30 minutes at 285 ° C.                 In the formula (I), 2 parts of phosphate ester salts having m = 8 and n = 4 were added and subjected to vacuum again for further 1 hour to prepare chips having an intrinsic viscosity of 0.63.

The polymer thus obtained was vacuum dried, and then the discharge amount was adjusted such that the area ratio of the sheath and the core was the same by using a cis-core composite spinning machine, so that the spinning temperature was 285 ° C.,                 After spinning with a winding speed of 1,100 m / min and a 24-hole nozzle, the film was stretched 3.1 times at a calculation speed of 900 m / min to obtain a 75 denier 24-hole stretch yarn.

[Comparative Examples 1 and 2]

The polymer of cis and core part was prepared by the same or different area ratios as in Example 1, and the conditions and results are shown in Table 1 below.

Comparative Examples 3 to 4

The polymer of the core portion was the same as in Example 1, but was polymerized with different intrinsic viscosity. The ritual was made under the same conditions as in Example 1, and the conditions and results are shown in Table 1 below.                 Indicated.

[Comparative Example 5]

In Example 1, the polymer of cis and core was fired interchangeably, and the results are shown in Table 2 below.

Comparative Example 6

100 parts of dimethyl terephthalic acid, 60 parts of ethylene glycol, 4 parts of polyethylene glycol having an average molecular weight of 1,000 and 0.03 parts of acetate acetate were placed in a reactor equipped with a condenser.                 Methanol was completely distilled off while heating up to 250 degreeC over 2 hours, and it transesterified.

When the transesterification reaction was completed, 0.01 parts of phosphoric acid, 0.4 parts of titanium dioxide, 0.035 parts of antimony trioxide were added thereto, and the mixture was stirred for 10 minutes.                 After a high vacuum reaction of 1 mmHg or less at 285 ° C. for 1 hour and 30 minutes, the vacuum was broken and 2 parts of phosphate ester salts were added, followed by vacuum again for 1 hour.                 To make 0.63 inherent viscosity chips.

The ritual used the general spinning method, not the complex spinning, and the results are shown in Table 2 below.

In Table 1 and Table 2, the measurement of the friction band voltage was made by the following method.

[Frictional belt voltage measurement]

After combining two stretched yarns and knitting them in a knitting machine, the frictional zone voltage was measured at 20 ° C. and 43% RH using a rotary frictional zone voltage meter.

Antistatic durability evaluation was compared with the friction voltage after 50 washes.

Claims (2)

Polyester sheath-core composite fibers, comprising: polyester polymerization processes produced from diols and dicarboxylic acids or ester compounds thereof                 Sheath copolymer (S) prepared by incorporating 3 to 10% by weight of polyethylene glycol having an average molecular weight of 400 to 4,000 during the esterification exchange reaction,                 The low molecular weight phosphate ester salt represented by the following formula (I) during the polycondensation reaction of the polyester polymerization step produced from dicarboxylic acid or ester compound thereof                 An antistatic polyester fiber comprising a copolymer for core (C) prepared by adding 0.5 to 2% by weight. C _m H _{2m + 1} -O- (CH ₂ CH ₂ O) _n -PO ₃ Na ₂ (Ⅰ) The method of claim 1, wherein the area ratio of the sheath and the core in the antistatic polyester fiber is 60:40 to 40:60, the difference in intrinsic viscosity is 0.03 to 0.05                 Antistatic polyester fiber characterized by the above-mentioned.