JPS59144616A - Antistatic conjugate fiber - Google Patents

Abstract

PURPOSE:An antistatic conjugate yarn that is obtained by coating a polyester, polyamide or polyesteramide copolymer containing a specific component with a thermoplastic polymer, thus showing good antistatic properties and high light resistance. CONSTITUTION:A polyester, polyamide or polyesteramide copolymer that is obtained by copolymerizing an alkali metal-sulfoisophthalic acid component such as 5-sodiosulfoisophthalic acid and a polyalkylene oxide component with dicarboxylic acid components such as adipic acid, diol components such as ehtylene glycol, diamine components such as ethylenediamine is used as the core or island component and another thermoplastic polymer such as polyethylene terephthalate is used as the sheath or sea component to give the objective antistatic conjugate yarn.

Description

[Detailed description of the invention] The present invention relates to composite fibers having antistatic properties.

Synthetic fiber products such as polyamide and polyester
Sensei disorder 1! To suppress polyalkyleneoxy I,
It is well known that the introduction of system compounds is effective. The method of kneading a block polymer consisting of a polyalkylene oxide component and a polyester or polyamide component into the wound is said to be optimal for applying durable antistatic thread. The polyalkylene oxide component, which is an electric agent, is easily bound in the fiber molecules, resulting in a decrease in mobility, which not only makes it difficult to achieve sufficient effects in low humidity conditions such as those experienced in winter, but also reduces the light resistance of the fiber. In addition, in order to solve the problem of light resistance, a method has been proposed in which a polyalkylene oxide component is used as a core or island component and ordinary polyester or polyamide is used as a sheath or sea component. There is a problem in that the important antistatic effect is small, probably because there is no antistatic agent on the fiber surface.

The present inventors conducted various studies to provide a synthetic fiber with excellent antistatic effect and light resistance. As a result, we found that, together with the polyalkylene oxide component, alkali metal sulfoisophthalic acid (SI)
A composite fiber whose core or island component is a block copolymer copolymerized with polyester, polyamide, or polyester amide (referred to as P) and whose sheath or sea component is a polymer that is easily charged with static electricity according to the first judgment is suitable for the above purpose. This led to the present invention.

Zunawara 1 The present invention consists of a component [A] consisting of polyester, polyamide or polyester amide containing a SIP component and a polyalkylene oxide component as copolymerized components;
The gist of the invention is an antistatic composite fiber composed of component (A) and component (B) made of a thermoplastic polymer covering component (A).

In the present invention, the polyester, polyamide, or polyester amide serving as the haze of component [A] is adipic acid, sebacic acid, or terephthalic acid.

Dicarboxylic acid components such as isosomal acid and naphthalic acid, ethylene glycol, and propylene glycol.

1. II-butanediol, diethylene glycol.

1. Diol components such as 4-isochlorohexanedimethanol and xylylene glinol, ethylene diamine 7, cyamine components such as tetramethylene diamine, hexamethylene diamine, and xylylene amine, ε-aminocarb (
Amino acid components such as conic acid 1 ω-aminototicanic acid,
It is a polymer obtained by suitably combining lacum components such as ε-caprolactam and lauryl lactam and polycondensing them. [Δ] Acid component polymers can be obtained by adding the S I l) component and a polyalkylene oxide compound having an ester- or amide-forming functional group during the synthesis of these polymers.

Preferred SIP components include 5-sodium sulfoisophthalic acid, 5-potassium sulfoisophthalic acid, and esters thereof.

The polyalkylene oxide compound may contain one or more hydroxyl groups, carboxyl groups, alkoxycarbonyl groups, amino groups, etc. A polyalkylene oxide compound having a hisphenol residue in two molecules is preferable because it has good heat resistance.The molecular weight of the polyalkylene oxide compound is 400 to 20,000.
．． Preferably, 800 to 10,000 is appropriate.

In the polymer of component [A), the amount of the srp component introduced is such that the amount of sulfonic acid groups is 30 to 500 equivalents/ton, preferably 50 to 300 equivalents/ton, and the amount of the polyalkylene oxide component is is 10 to 70% by weight, preferably 20 to 60% by weight.

Next, thermoplastic polymerization of component (B) in the present invention (for wood, +45 tylene terephthalene 1. Ingredients include polyester, nylon 6, two-iron 12.
Nyl Stove G, Nyl:In 610, and polyamides and polyesters containing these as main components.

Preferred are borisoIlpyrene and polyolefins containing these as main components.

The fiber of the present invention is a composite fiber having a shape in which the component (A) is covered with the component CB), and has a core, sheath, Katamata & Jkai,
'Has an A-shaped shape. Fibers having such a shape can be obtained by known methods. Taking into account antistatic performance, light resistance, yarn reeling properties, fiber properties, etc., the ratio of the [Δ] component to the CB) component is preferably in the range of 5:95 to 50.50 based on the cross-sectional area ratio. It goes without saying that either or both of the [A] acid component CB) component may contain a flame retardant, a heat resistant agent, a matting agent, a coloring agent, and the like. Although it is not desirable to include components that affect light resistance in component CB), a polyalkylene oxide component may be included in component CB) in a small amount to further improve antistatic properties.

The present invention will be explained in more detail below with reference to Examples.

The antistatic properties in the examples were measured using a 2-Kyoto University Kaken type l coater static tester using a cotton cloth as the friction body at 20°C.
, in an atmosphere of 40% RH using a method to determine the charging voltage and half-life of ljS. (Parts indicate parts by weight.) Example 1 His(β-hydroxyethyl) terephthalate 7os,
Average molecular weight: 2.00 obtained by adding ethylene oxide to 8 parts of bis(β-hydroxyethyl) ester of 5-sl-lium sulpoisophthalic acid and hisphenol 8
0.02 parts of antimony trioxide in a mixture of 22 parts of the compound of
0.2) l.

Polycondensation was carried out at 260'c for 3 hours to obtain copolymerized polyesteral [Δ1].

(A+'l and ordinary polyethylene telecrate (0
, CB+) containing 5 small % titanium oxide particles) and (
A+) forms the core and a core-sheath type composite yarn with a cross-sectional area ratio of 10:90 is obtained using an Ex1-Rougu type melt spinning machine, with a spinning hole of 36 holes at 280 c. The sample was discharged from the container and wound up at a speed of 1,200 n+/min. Next, it was stretched at a stretching temperature of 90° C. and a stretching ratio of 3.3 times to obtain a film of 75 d/36 f and a strength of 4.1 g/d.

The drawn yarn had an elongation of 35%. There were almost no problems such as yarn breakage, and the yarn spinnability was good.

The above drawn yarn was milled at a density of 50 g/m, and then refined.
Dyeing was carried out at 135°C for 130 minutes in a bath containing Suishoku disperse dye. The frictional charging voltage and half-life of the iM dyed fabric were 1.000 V and 10 seconds, respectively.

This performance did not deteriorate even after Baum laundry was repeated 30 times.

Example 2 5-sl-lium sulfoisophthalic acid 5 parts 2 polyethylene oxide with amino groups at both ends (average molecular ffl 3
, 000), 2 parts of hexamethylene diamine, and 52 parts of cabrolaccum to obtain copolyamide [A2] by a conventional melt polycondensation method.

A core-sheath type composite yarn in which [A2] forms a core was spun from [A2] and ordinary nylon 6 (containing 0.3% by weight of titanium oxide particles) CB2) under the following conditions.

Core:pod cross-sectional area ratio io': 90 Spinning temperature 265°C Number of spinning holes 16 holes Spinning take-up speed 1,200, m/min Drawing temperature 30°C Stretching ratio 3.2 times Obtained drawn yarn (70d/16f , strength 4.5 g/
d.

50g/n? After knitting in a tube at a density of
Dyeing was carried out at 98° C. for 40 minutes in a bath containing blue acid dye.

The frictional charging voltage and half-life of dyed cloth are 800V and 6, respectively.
Showed seconds.

Comparative Example Polyethylene oxide compound 4or+ used in Example 2
++, 1.5 parts of adipic acid and turnip +:r: Using the polyamide obtained from Fukutano, 58.5 parts instead of [82], the same operation as in Example 2 was carried out, or The voltage and the 214 decay time are each 2,0OO
V.

It was 70 seconds.

Patent applicant: Unitika Co., Ltd.

Claims (1)

[Scope of Claims] A thermoplastic polymer that covers the [Δ] component and the (A) component, which is made of polyconister, polyamide, or polyester amide, which is a copolymerized component of a +1+ alkaline metal sulfoisophthalic acid component and a polyalkylene oxide component. An antistatic composite fiber composed of a (T3) component consisting of a combination.