KR870001133B1 - Anti-electric polyester fiber's making method - Google Patents

Abstract

This invention relates to the modified making method of antielectric polyester fiber. The making method is as follows; blockpolytheramide (B) and the homopolyamide (C) are mixed and distributed in the fiber- formable polyether (A) as a core component. At this time, the mixing condition is as followsi 0.5 <= VB <=5, 6.6<=B+C<=10, 0.005<=C/A<=0.005. The letters A, B, C are the percent of each componet, respectively.

Description

Manufacturing method of antistatic polyester fiber

The present invention relates to an improved method for producing a polyester fiber having excellent antistatic performance and good light fastness. That is, a homopolyamide, which is a third component in the complex spinning of a polyester and a block polyether amide, is a block polyether. The present invention relates to a method for producing an antistatic polyester fiber by imparting good antistatic performance without melt-mixing with amide and complex spinning with polyester to impair the excellent inherent properties of the polyester fiber. In other words, the present invention is a permanently antistatic performance, flammable and reduced by a small number of antistatic components by arranging the block polyether amide copolymer which is an antistatic component in a concentric manner while randomly mixed with the polyamide component inside the polyester An object of the present invention is to provide an improved manufacturing method for providing a fiber of a concentric circular composite fiber having excellent post processing.

Polyester fibers are the mainstream of fibers having excellent morphological stability, but have serious drawbacks in that static electricity is severely generated.

In particular, when a knitted fabric or a fabric is manufactured by polyester yarns by various post-processing, electrostatic interference is remarkably generated, thereby limiting the product development range. Various methods have been attempted to solve this drawback.

For example, a method of imparting antistatic properties by mixing polyalkylene ethers with polyesters as a method of improving antistatic performance by mixed spinning has been disclosed in Japanese Unexamined Patent Publications No. 39-5214. Since some or all of the ether does not bind with the polyester, it is gradually washed by washing or the like, so that the antistatic effect is reduced and there is no permanentity.

In addition, the polyalkylene ether is poorly compatible with the polyester, and is present independently in the polyester when mixed spinning and fiberizing.

If such an incompatible antistatic component is present on the surface of the fiber, it will be separated when subjected to mechanical deformation, so the polyalkylene ether must be mixed in a way that does not exist on the surface.

In addition, as known, a method of imparting permanent antistatic properties to polyester fibers is to disperse the copolymer of polyalkylene oxide and polyamide in a thin and long line in the polyester filament to dissipate static electricity generated by friction fibers. Methods for discharging to the outside are also widely known.

All of the above manufacturing methods were effective in having a permanent antistatic property, but the difference in the antistatic performance was severe depending on the dispersion state of the antistatic component of the fiber, that is, polyalkylene ether block polyetheramide, and the polyester fiber was colored when the dispersion was poor. Problems such as lowering of elongation occur, and the inherent properties of the polyester fibers are lost.

In other words, if a large amount of antistatic component is added in order to have antistatic performance, fibrillation becomes remarkable and the textile field used by dyeing in deep colors is used as well as in the textile field used in dyeing other than white. By fibrillation, the aesthetic appearance is significantly impaired. In particular, the surface of the fiber is cracked during the process of severe physical external force, so that the microfiber ends are dropped and dust may be generated. In addition, when the addition ratio of the antistatic component is reduced in order to prevent cracking and the like, it is difficult to expect a satisfactory antistatic effect due to low antistatic performance.

An object of the present invention is to improve the polyester composite fiber to solve the deficiencies of the prior art to maintain a good physical and chemical properties of the polyester while having excellent antistatic performance and excellent post-processing performance such as flammability, weight loss, etc. To provide an established method.

In order to achieve the above object, as the polyalkylene oxide used in the copolymer of alkylene oxide and polyamide, a molecular weight of 200 or more is preferable. For example, polyethylene glycol, nonylphenyl glycol, polyhetrahydrofuran or These are copolymers and are not necessarily limited to this.

As polyamide copolymerized with a polyalkylene oxide, the homopolymer, such as nylon-6,8,12, or the copolyamide which is a copolymer thereof is mentioned.

In the present invention, in order for the polyester to have excellent antistatic performance and excellent manufacturability, the block copolymer, which is an antistatic component, must be uniformly arranged inside the polyester concentrically around the fiber axis. It should be less than 5% to have a stable fiber structure in post processing.

However, the content of the polyalkylene oxide in the present invention is 20% by weight to 80% by weight, but 40% by weight to 60% by weight is particularly preferable.

In addition, the ratio of the copolymer to the total polyester is suitably between 0.1% by weight and -5% by weight, but in this case, the amount of copolymer discharge is less than the minimum discharge amount of the spinning band, which causes difficulties in the spinning process.

In order to solve this problem, in the present invention, it is completely branded because of excellent compatibility with the antistatic component, and it is difficult to spin the homopolyamide, which is somewhat superior to the polyester and the compatibility with the antistatic component, by blending it with the antistatic component and then blending the polyester after blending. At the same time, it was possible to obtain excellent antistatic performance and yarn properties.

On the other hand, in the present invention, the method of mixing the polyalkylene oxide copolymer and homopolyamide is obtained by placing the homopolyamide and the copolymer in a chip state and drying them in a conventional manner, and blending them in a bulenta for 30 to 60 minutes. By using a dry polyester chip and a composite spinning method, two types of molten polybars meet in a detention, and a mixture of antistatic components and homopolyamides is arranged as a core component in the polyester concentrically to improve antistaticity and weaving efficiency. An antistatic polyester fiber having improved flammability and dyeability after workability is produced.

The summary of the manufacturing method by this invention demonstrated above is as follows.

[next]

(1) Block polyether amide copolymer (component B) having a molecular weight of 200 00 to 30000 by copolymerizing a monomer capable of forming polyamide with a polyalkylene glycol having a horizontal molecular weight of 2,000 or more and a terminal group substituted by an amino group of 95% or more. And a homopolyamide (component C) having a molecular weight of 2000 to 2500 are mixed under the following conditions and then distributed as a core component in the fiber-forming polyether (component A) to prepare an antistatic polyester fiber.

[Below]

VB

50.5

VB

5

B+C

100.6

B + C

10

C/A

0.0550.005

C / A

0.055

Where A, B and C are the weight percentages of each component.

는 폴리에스테르의 용융점도but,

Is the melt viscosity of the polyester

는 블록폴리에테르 아마이드 공중합체의 용융점도이다.

Is the melt viscosity of the block polyether amide copolymer.

The eight embodiments of the present invention are described in detail as follows.

EXAMPLE

Polyethylene terephthalate (hereinafter referred to as A polymer) having a melt viscosity of about 3000 poise at 280 ° C. was prepared by a conventional method, and a polyethylene glycol group having a number average molecular weight of 3500 was substituted with an amino group under an alkali catalyst to Etheramine was synthesized, and an appropriate amount of adipic acid ε-cacaprolactam was mixed and polycondensed to synthesize block polyetheramide (hereinafter referred to as B polymer) having a melt viscosity of about 10,000 poise, followed by homopolyamide (hereinafter referred to as After blending with (C polymer), the (B + C) component was disposed concentrically around the A component as a core part.

Three kinds of components were tested by screw ratio in the screw-type radiator, and the change of antistatic performance and yarn properties were shown in Tables 1 and 2. As a result, in general, the antistatic component of 2.5 wt% to 5 wt% showed no difference in antistatic performance and showed good yarn properties as the antistatic component yarn decreased.

TABLE 1

=3, (B+C)/A =0.1로 일정only

= 3, constant with (B + C) / A = 0.1

: 폴리에스테르의 용융점도,(only,

: Melt viscosity of polyester,

: 블록 폴리에테르아마이드 공중합체의 용융점도)

: Melt viscosity of block polyetheramide copolymer)

TABLE 2

=3, B/C=1로 일정only,

= 3, schedule B / C = 1

: 폴리에스테르의 용융점도,(only,

: Melt viscosity of polyester,

: 블록 폴리에테르아마이드 공중합체의 용융점도)

: Melt viscosity of block polyetheramide copolymer)

Claims (1)

A block polyetheramide copolymer (component B) having a molecular weight of 20000 to 30000 is copolymerized with a polyalkylglycol having a horizontal molecular weight of 2,000 or more and a terminal group substituted with 95% or more of an amino group and a monomer capable of forming polyamide. Method for producing an antistatic polyester fiber characterized in that the homopolyamide of (C component) is mixed under the following conditions, and then distributed as a core component in the fiber-forming polyether (component A). [Below] 0.5

VB

5 6.6

B + C

10 0.005

C / A

0.055 Where A, B and C are the weight percentages of each component.

but,

Is the melt viscosity of the polyester,

Is the melt viscosity of the block polyether amide copolymer.