JP3279529B2 - Split type composite yarn with excellent antistatic performance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type composite yarn for producing ultrafine fibers which is easy to handle and suppresses generation of static electricity.

[0002]

2. Description of the Related Art Split-split composite yarns for producing ultrafine fibers are multi-segment filaments in which a first component is separated into at least three or more segments by a second component in a single filament. The affinity, solubility, and degradability of the second component B are chemically dissolved or decomposed and removed, or the two components are mechanically separated from each other depending on the difference between the two components. It can be formed.

Various methods have been studied for the production method, for example, JP-B-48-28005 and JP-B-61-34.
No. 278, Japanese Unexamined Patent Publication No. 6-306734 and the like, split type composite yarns made of nylon and polyester are also known, but split type composite yarns split into ultrafine fibers. As a result, the generation of static electricity is large and it is difficult to handle, and there are also problems in the color developability and fastness after dyeing.

There is an attempt to use an antistatic agent in the polyester component. However, even if a commercially available antistatic agent is mixed in the ordinary polyester component, a sufficient antistatic effect cannot be obtained.
In addition, problems such as color development after dyeing were not solved.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to make split-split composite yarns made of nylon and polyester more antistatic and easy to handle, and to improve the coloring properties after dyeing. I do.

[0006]

In the present invention, the above-mentioned problems have been solved by using a cationic polyester as a polyester component and using a special polyester-based antistatic agent as an antistatic agent. That is, the splitting type composite yarn of the present invention is a fiber-forming polyester containing 0.5 to 2.0 mol% of a metal sulfonate group-containing isophthalic acid with respect to a polyamide component A and an acid component contained in the polyester. In the composite yarn comprising the component B, one component A or B is located radially on the cross section of the composite yarn so that the other component B or A divides the other component B or A into at least two. A polyester-based antistatic agent comprising a polyalkylene glycol and an ionic antistatic agent, in a longitudinal direction of the composite yarn, in a ratio of 0.1 to 3.0% by weight with respect to the weight of the component B in the form of a stripe. It is characterized by being contained in.

[0007] Here, "in the longitudinal direction, in the form of a streak" means that it is not always necessary to form one streak in the longitudinal direction, and the polyester-based antistatic agent is added in an amount of 0.1 to 3.0% by weight. It suffices if it exists continuously in the longitudinal direction so that a sufficient effect can be obtained at a rate. If the polyester-based antistatic agent is uniformly mixed into the entire polymer, the above addition rate cannot provide a sufficient effect. For example, after the antistatic agent is pressed into the polyester component B, L / D = Preferably, the mixture is passed through 5 to 11 static mixers and mixed.

As the above-mentioned antistatic agent, for example, a polyalkylene glycol of the formula 2 containing 15 to 40% by weight of an ionic antistatic agent represented by the formula 1 and having an average molecular weight in the range of 1,000 to 10,000, and terephthalic acid are used. It is preferable to use a polyester compound represented by the following formula: [Equation 1] RSO ₃ ^- M ⁺ [Formula 2] _{HO- (C n H 2n O)} m -OH ( where, R represents an alkyl group of formula 1, an aryl group, an aralkyl group or alkylaryl group, M is Represents Li, Na or K, n in Formula 2 is an integer of 1 to 4, and m is an average molecular weight of the polyalkylene glycol of Formula 2 of 1000 to 100.
Indicates a number that becomes 00. )

As the antistatic agent of the formula 1, it is usually preferable to use, for example, R having an alkyl group, an aryl group, an aralkyl group or an alkylaryl group having 10 to 20 carbon atoms.

As the component B, it is particularly preferable to use a fiber-forming polyester containing 0.5 to 2.0 mol% of a metal sulfonate group-containing isophthalic acid. If the amount of isophthalic acid containing a metal sulfonate group is less than 0.5 mol%, sufficient antistatic and dyeing effects cannot be obtained, and 2.0
If it exceeds mol%, the electric affinity with the cationic group of the polyamide component increases, so that the splitting becomes difficult. Further, the fiber-forming polyester specifically refers to a polyester polymer having a fiber-forming ability in a composite form with a polyamide, such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate.

[0011] The amount of the antistatic agent to be mixed therein is as follows:
It is preferably from 0.1 to 3.0% by weight, particularly preferably from 0.5 to 1.5% by weight, based on the weight of component B.

In the composite yarn of the present invention, the generation of static electricity is suppressed by the cationic group of component A (polyamide) and the anionic group of component B (cationic polyester), and the special yarn containing an ionic antistatic agent is used. Since the polyester-based antistatic agent is present in a streak shape in the longitudinal direction of the fiber, the generated static electricity is immediately eliminated (the half-life of the voltage is short). Since it has an electric charge as a whole, static electricity quickly disappears from the fiber surface, and it is very easy to handle.

[0013]

Next, an embodiment of the present invention will be described.
In the examples, parts and% indicate parts by weight and% by weight, respectively, unless otherwise specified. Example 1 (Method for producing polyester-based antistatic agent) Polyethylene glycol 73.6 having an average molecular weight of 8000
Parts, 0.1 part of antioxidant (Irganox 1010 manufactured by Ciba-Geigy Japan), polycondensation catalyst (antimony trioxide)
0.037 parts, 8.8 parts of bishydroxyethyl terephthalate (hereinafter referred to as BHET) and 30.8 parts of a 65% aqueous mixture of sodium dodecylbenzenesulfonate were each charged into a polycondensation reactor, and charged in a nitrogen stream. The temperature was raised while stirring and mixing under normal pressure. 6 hours at 160 ° C, then 240 ° C
After sufficiently removing water over 6 hours, the pressure was reduced from 760 mmHg to 1 mmHg over 2 hours while maintaining the temperature at 240 ° C. Further, the temperature was raised to 250 ° C. and 1 mmHg for 3 hours.
While maintaining the following conditions, the melt viscosity was increased to obtain 100 parts of a polyester-based antistatic agent having a relative viscosity of 3.00.

Example 2 A copolymerized polyethylene terephthalate (hereinafter referred to as CP) having an intrinsic viscosity of 0.57 and containing 1.5 mol% of sodium sulfoisophthalic acid component based on the total acid component, according to a conventional method. {Component B} was obtained. 6 having a relative viscosity of 2.70 with CP
Using nylon (hereinafter referred to as NP) {component A-}, a yarn having the cross-sectional shape shown in FIG. 1 was mixed with a yarn having a composite ratio (polymerization ratio) of CP and NP of 2: 1 according to a conventionally known composite spinning method. Composite multifilament (50 denier 25 filament)
Was spun at a spinning temperature of 290 ° C. and a winding speed of 1000 m / min. At that time, the polyester-based antistatic agent of Example 1 was pressed into the CP at a ratio of 0.9% by weight with respect to the CP component so as to form a streak in the longitudinal direction of the filament. The obtained undrawn yarn was drawn at a draw ratio of 3.232 while being heat-treated with a roller heater at 85 ° C. and a plate heater at 150 ° C. at a speed of 800 m / min to obtain a composite multifilament of 50 denier and 25 filaments. .

Comparative Example 3 Using CP and NP, a composite multifilament was spun in the same manner as in Example 2. However, the polyester antistatic agent was not injected.

Comparative Example 4 Polyethylene terephthalate (hereinafter referred to as PET) having an intrinsic viscosity of 0.64 was used in place of CP, and a polyester-based antistatic agent was pressed into it to obtain a composite multifilament as in Example 2. Was.

Comparative Example 5 The same method as in Comparative Example 4 was carried out without injecting the polyester antistatic agent.

Evaluation method of antistatic performance Opening treatment of composite multifilament The composite multifilaments obtained in Example 2 and Comparative Examples 3 and 4 were each made into a fabric with a double knitting yarn by using a tubular knitting machine. Was immersed in an aqueous benzyl alcohol solution for 10 minutes to sufficiently swell the NP component, then washed with hot water at 60 ° C. for 10 minutes, and air-dried at room temperature. In the tubular knitted fabric after the treatment, the NP component and the polyester component were completely divided and split. 2. Evaluation of antistatic performance The split tubular knitted fabric obtained in 1 above was subjected to JIS L
Of the measurement methods described in -1094, the charged voltage is the B method,
The half-life was measured by the method A, respectively. Table 1 shows the measurement results.
Shown in

Table 1 {Measurement conditions: temperature 20 ° C., humidity 40 RH%}. Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Yarn Configuration • Polyamide component NP NP NP NP • PET component CP CP PET PET • Antistatic agent 0.9 w% no 0.9 w% no charged voltage (V) 1050 5434 2201 6352 Half-life (sec) 9.0 120 or more 9.5 120 or more

[0020]

EFFECT OF THE INVENTION The split type composite yarn of the present invention is excellent in color development after dyeing by using a cationic polyester,
In addition, the opposite ionicity of nylon and cationic polyester, and the polyester component contains a special polyester-based antistatic agent in the form of stripes in the longitudinal direction of the fiber, so it is extremely rich in antistatic properties and generates static electricity. This has the effect of disappearing immediately.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a composite yarn according to an embodiment of the present invention.

[Explanation of symbols]

 A nylon B copolymerized polyethylene terephthalate

Continued on the front page (72) Inventor Shigeki Honda 4-1 Kanebocho, Hofu City, Yamaguchi Prefecture Kanebo Synthetic Fibers Co., Ltd. (72) Inventor Kiyoshi Takase 1-2-2 Umeda, Kita-ku, Osaka-shi, Osaka Kanebo Synthetic Fiber Co., Ltd. (56) References JP-A-9-241927 (JP, A) JP-A-50-107215 (JP, A) JP-A-6-343033 (JP, A) JP-A-56-20615 (JP, A) JP-A-6-158429 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) D01F 8/12 D01F 8/14 D01F 6/92 301-309

Claims (2)

(57) [Claims] A composite yarn comprising a polyamide component A and a fiber-forming polyester component B containing isophthalic acid containing a metal sulfonate group in an amount of 0.5 to 2.0 mol% based on an acid component contained in the polyester. , One component A or B
Is located radially on the cross section of the composite yarn so as to divide the other component B or A into at least two. In the component B, an ionic antistatic agent and polyalkylene glycol are used. A polyester-based antistatic agent is streaked in the longitudinal direction of the composite yarn in an amount of 0.2 to the weight of the component B.
Split split type composite yarn having excellent antistatic performance, characterized in that it is contained at a ratio of 1 to 3.0% by weight. 2. The antistatic agent contains 15 to 40% by weight of an ionic antistatic agent represented by the formula 1, and has an average molecular weight of 1,000.
2. The split yarn according to claim 1, wherein the split yarn is a polyester compound comprising a polyalkylene glycol of the formula 2 and terephthalic acid in a range of from 1 to 10,000. 3. [Equation 1] RSO ₃ ^- M ⁺ [Formula 2] _{HO- (C n H 2n O)} m -OH ( where, R represents an alkyl group of formula 1, an aryl group, an aralkyl group or alkylaryl group, M is Represents Li, Na or K, n in Formula 2 is an integer of 1 to 4, and m is an average molecular weight of the polyalkylene glycol of Formula 2 of 1000 to 100.
Indicates a number that becomes 00. )