JPH04108127A - Silk-like conjugate fiber yarn - Google Patents

Abstract

PURPOSE:To obtain the inexpensive title yarn having silk handle, excellent swelling and natural appearance and good operating property by encircling a left component of cross section of a fiber with a component eluted in radial manner and dividing the left component into plurality by elution. CONSTITUTION:A polymer, preferably containing >=90mol% ethylene terephthalate is blended with a polyalkylene glycol, preferably of 3-20wt.% to afford a component (A) capable of readily eluting in large amounts, which is then used as most outer peripheral part and further non-circular cross section form of a component (B) left by elution and having denier constitution capable of satisfying the formula (da is maximum denier of the component B; db is minimum denier; dc is average denier of the component B) is encircled with the component A in radial manner to provide the aimed yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to composite fibers. More specifically, the present invention relates to a composite filament yarn that can simultaneously satisfy silk-like different cross-sectional shapes and mixed fibers of different fineness.

(Prior art) Conventionally, the technology of dividing a composite component into multiple pieces by eluating a part of one component was developed in Japanese Patent Publication No. 47-188.
Sea-island type composite yarn as typified by Publication No. 94 etc. and Special Publication No. 48-
Making a radial composite yarn as typified by Publication No. 37044, etc.
The technology to obtain ultra-fine fibers that could not be spun using conventional spinning methods and special ultra-irregularly shaped yarns by eluting these components is well known. As a technique that can simultaneously satisfy mixed fineness fibers, there is a known technique as disclosed in Japanese Patent Application Laid-open No. 32-21827, in which filaments with different cross-sectional shapes and finenesses are spun from a single nozzle to obtain a mixed fiber yarn of different shapes and denier. However,
In the former case, the fibers after elution are the same and can only express the uniformity or flattened appearance peculiar to synthetic fibers. On the other hand, the latter can express a natural appearance that breaks away from the uniformity characteristic of synthetic yarns, but because filaments with complex cross-sectional shapes and different deniers are spun at the same time, differences in physical properties occur between the filaments, resulting in uniform and advanced physical properties. That is impossible. or,
Because filaments with complicated cross-sectional shapes and hole deniers are simultaneously spun, it is often difficult in terms of operability. To solve these problems, it is possible to separately spin and draw filaments of V4 naldenyl and then mix them later, but this is extremely disadvantageous in terms of additional cost.

(Problem to be solved by the invention) The eternal goal of synthetic fibers is to express the texture elements of silk. In particular, post-kneaded silk fabrics are characterized by their fullness, elegance, and natural appearance. These characteristics are due to the fact that each silk fiber is composed of different fibers, and the inter-fiber voids created when sericin is removed (kneading process). Furthermore, sericin has high thermoplasticity and functions to improve the twist setting properties during twisting and to increase the thread passing properties of the twisted yarn.

The present invention has a silk-like different denier effect and a silk-like sericin effect, and can produce fibers that can express a natural appearance without the uniformity characteristic of synthetic yarns at a low cost with excellent operability. It is a composite fiber.

(Means for Solving the Problems) In other words, the conjugate fiber yarn of the present invention is capable of eluating at least a portion of at least one component of the conjugate component. The main point is that polyester polymers of different deniers, which surround other components and also constitute the outermost periphery of the composite fiber, are non-circular and satisfy the following formula [1]. More preferably, it is a composite fiber in which the most easily eluted component is a polyester polymer in which at least 90 mol% has ethylene terephthalate repeating center, and 3% by weight or more, 20% by weight or more of polyalkylene glycol blended. , and other components include at least 0.5 of the non-circular and different denier polyester polymer.
It contains a poly-7 ester filament copolymerized with a carboxylic acid component containing a sulfonic acid metal salt in an amount of mol%.

0.5J (d, -d, ,)/dcJ2. O... [1
] Here, d,: Maximum denier of the remaining component in one doweled yarn d b:
? Minimum denier of remaining components in i doubled yarn dc: Average denier of remaining components in 1 doubled yarn.

One of the objects of the present invention is to create silk-like interfiber voids, and it is important that the component that is most easily eluted out of the eluted components completely surrounds the other components, so that the outer periphery of the composite fiber can be easily If the eluted component is not present, not only will the voids between fibers not be sufficiently removed, but the twist setting property during twisting will not be sufficiently effective.Another objective is to create a silk-like non-uniform and natural appearance. The remaining component may be a non-circular polyester polymer of different deniers.

The non-circular shape is essential for gloss and tactility. If the cross section is round, the luster will be an unpleasant luster peculiar to synthetic fibers, and preferably the degree of irregularity expressed as the ratio of inscribed circle/circumscribed circle is 1.5 to 5.0. The need for different deniers is because each fiber lI# element has its own effect on texture, with thin fibers expressing a soft touch, and thicker fibers expressing firmness. To achieve this objective, the denier range is preferably 0.3 to 4.0 denier. The presence of fibers of more than 4 denier gives the resulting fabric a stiff feel, while the presence of fibers of less than 0.3 denier results in poor abrasion resistance.
When dyeing with disperse dyes, sublimation transfer of the dye occurs, resulting in the problem of contaminating other fabrics. Further, the filament denier structure after elution in the composite fiber yarn needs to satisfy the above formula [1]. When the formula [1] is less than 0.5, the natural appearance due to the different denier effect disappears, resulting in a uniform appearance. [1] If the formula exceeds 2.0, the difference in denier of the resulting fibers becomes too large, and the bending hardness of the thick denier yarn will impair the texture, or the fine denier yarn will become too thin, resulting in poor durability against abrasion. In addition, in the case of polyester, problems such as contamination due to sublimation transfer of the dye when dyeing with a disperse dye are highly undesirable. In addition to polyester, the remaining components include polyamide-based materials. The most easily eluted polymer is a polyester polymer having at least 90 mol% or 5ffiffi% or more of ethylene terephthalate repeating units.
It is more preferable to use a polymer blended with 120% by weight or more of polyalkylene glycol. The purpose of blending polyalkylene glycol is to selectively elute polyalkylene glycol and form irregularities on the surface of the eluted polymer, thereby significantly increasing the surface area and increasing the elution rate. To achieve this purpose, the blending amount of polyalkylene glycol is preferably 5% by weight or more, and if it is less than 5% by weight, the effect of increasing the elution rate is insufficient, especially when a cationically dyeable polyester with a fast elution rate is used as a non-eluting component. In this case, while the eluted components are completely eluted, the non-eluted components are also eluted.

Furthermore, if the blend amount of polyalkylene glycol exceeds 20% by weight, the melt viscosity of the blend will decrease, and the stability during spinning will be impaired. More preferably, using a polyester copolymerized with 5 mole % or less, preferably 3 mole % or less, and even 1 mole % or less of 5-sonoyum sulfoisophthalic acid to the base polymer to which polyalkylene glycol is blended will improve the elution rate. It is possible to increase it.

The purpose of this process is to impart twist-setting properties to the eluted components, and from this point of view as well, polyester blended with polyalkylene glycol is preferable.If the polyalkylene glycol content is less than 3%, the twist-setting effect will be insufficient. It is. Further, it is more preferable that at least one component of the polyester polymer, which is a slow elution component, is a polyester copolymerized with 0.5 mol % or more of a carboxylic acid component containing a metal sulfonic acid salt. The purpose of copolymerizing carboxylic acid containing sulfonic acid metal salts is to remove the texture of plastics and to enable dyeing with cationic dyes that produce more vivid colors. No. Although the L limit value is not particularly specified, it is preferably kept at 5 mol% or less in view of stability during spinning, strength of the fabric obtained, etc. It is also possible to use a polyester homopolymer as the third component, and after elution, form a mixed fiber yarn of 1,000 ion dyeable polyester and dispersion dyeable polyester. Using this method, it is also possible to create mixed fibers of different colors. Further, if necessary, a light-resistant agent, a matting agent, an antistatic agent, a micropore-forming agent, etc. may be added to the polyester. Hereinafter, details will be explained in Examples, but the content of the present invention is not limited thereto.

(Example) Four types of polymers (A) CB) (C) (:D) were polymerized under the following conditions.

Polymer (A) dimethyl terephthalate (DMT) 1000 parts, 5-
Sodium sulfoisophthalate dimethyl ester (DS
N) 45.8 parts, ethylene glycol (EG) 700 parts and 45.3 parts of a glycol in which R is a 2.2-dimethylpropylene group, t+J is 2, and the value of m+n is 5 in the general formula [1] into a transesterification reactor,
To this was added 0.38 parts of zinc acetate dihydrate and 0.38 parts of sodium acetate.
50 parts (however, 0 part when not adding DSN) and 0.33 part of antimony pentoxide to give a concentration of 150 to 210
While raising the temperature to ℃ over 130 minutes, the transesterification reaction was carried out while distilling off the by-product methanol. I got it. Further, 0.8 part of diethyl-2-carbethoxyethylphosphonate was added and held for 10 minutes. The obtained product was 210
Transfer to a polycondensate total of ℃ and increase the internal temperature to 210-275 for 80 minutes.
While increasing the temperature to ℃, the pressure of the system was gradually reduced to 275℃.
．． A polycondensation reaction was carried out at 1w Hg for about 40 minutes to obtain a copolymerized polyester having a predetermined composition. Side lamp viscosity of the obtained polymer (30°C phenol/tetrachloroethane=
(measured with 6/4 solvent) was 0.46. The obtained polyester was dried at 0.1 cm Hg at 1130°C for 12 hours, and after cooling, polyethylene glycol (hereinafter abbreviated as PEG) having a molecular weight of 120,000 and dried at 0.1 cm Hg and 25°C was added to the % blended and pelletized at 280°C using a kneader with one screw.

Polymer CB) 1000 parts of dimethyl terephthalate (DMT), 700 parts of ethylene glycol (EG), 70 parts of trioxide/timo.
In order to input only 33 parts into the transesterification reactor,
A polyester resin was obtained in the same manner as in the case of polymer [A]. The intrinsic viscosity of the polymer was 0.63.

Polymer [C] 1000 parts of dimethyl terephthalate (DMT), 5-sodium sulfoisophthalic acid dimethyl ester (DSN
), 700 parts of ethylene glyfur (EG) and 0.33 parts of antimony dioxide were added to make 15.
The transesterification reaction was carried out while raising the temperature from 0 to 210°C over 130 minutes and distilling off the by-product methanol. Further, 0.8 part of diethyl-2-carbethoxyethylphosphonate was added and held for 10 minutes. The obtained product was transferred to polycondensation at 210°C, and the internal temperature was increased to 210°C for 80 minutes.
While increasing the temperature to ~275°C, the system was gradually reduced in pressure, and then 2
75℃0. A polycondensation reaction was carried out at ImHg for about 40 minutes to obtain a copolymerized polyester having a predetermined composition. The intrinsic viscosity of the obtained polymer +, & (measured at 30° C. in a solvent of phenol/tetrachloroethane=6/4) was 0.48.

Polymer [D] 1000 parts of dimethyl terephthalate (DMT), 5-sodium sulfoisophthalic acid dimethyl ester (DSN
) 19.9 parts of ethylene glycol (EG), 700 parts of ethylene glycol (EG) and gelcol 60. Transfer 4 parts to a transesterification reactor, add 0.38 parts of zinc acetate dihydrate and 0.38 parts of acetic acid.
．． 50 parts and adding 0.33 parts of antimony trioxide,
While heating at ff4 for 130 minutes to 150-210℃,
The transesterification reaction was carried out while distilling off the by-product methanol. Further, 0.8 part of diethyl-2-carbethoxyethylphosphonate was added and held for 10 minutes. The obtained product was transferred to polycondensation at 210°C, and the system was gradually reduced in pressure while increasing the temperature of the inner shoulder to 210-275°C for 80 minutes.
Thereafter, a small condensation reaction was carried out at 275°C and 0.1**Hg for about 40 minutes to obtain a copolymerized polyester having a predetermined composition. The intrinsic viscosity of the obtained polymer (measured at 30°C in a solvent of phenol/tetrachloroethano=6/4) was 0.60.

Example 1 As the most easily eluted polymer, 10% by weight of polyethylene glycol was blended with a polyester obtained by copolymerizing 3% by mole of a carboxylic acid component containing a sodium sulfonic acid salt and 3% by weight of an ethylene oxide adduct of neopentyl glycol. Using a polymer and regular polyester as a slow elution component, a composite yarn with the cross-sectional shape shown in Figures 1 and 2 was heated at 280°C at 1300 m/sin.
The yarn was spun at 85° C. and drawn at 85° C. to obtain a filament yarn. Polymers that are easily disposed and eluted were set at a composite ratio of 25% of the total. Next, when the six composite yarns in Figure 1 and the six composite yarns in Figure 2 were twisted at 2500 turns/m and set in a steam oven at 100°C, the twisting torque almost disappeared. In this state, there were no problems due to fraying during the next weaving process. Using the same lineage, weave the jose and throat, and use the standard method to weave 1 grain.
7. After that, it was presented at 160°C. Subsequently, the mixture was treated with a caustic soda aqueous solution (30 g/Q) at 90°C for 40 minutes.
The final race was at 65 degrees Celsius. The fabric shown on the right was uniform and highly wrinkled, and had a unique texture with plenty of fluff.

Example 2 A composite yarn was obtained in exactly the same manner as in Example 1, except that a multiple component of regular polyester and cationically dyeable polyester was used as the slow elution component. The regular polyester and the cationically dyeable polyester were arranged alternately in the circumferential direction in the cross section. After twisting at 300 turns/m using the same type, it was woven into a habutae structure, and finished in the same manner as in Example 1, except that no graining was done. The same one on the right was a fabric that was full of volume, had an elegant luster, and had an extremely natural appearance.

Example-3 Same as Example-1 except that cationic dyeable polyester was used as the slow-release component and the fineness of the fibers was 8 denier.
Composite yarn was obtained using exactly the same method, woven and finished using the same method, and dyed with cationic dye after alkali treatment. The resulting fabric was excellent in wrinkle resistance, swelling, and color development, and 41 fabrics were obtained that exhibited a unique texture.

Example 4 A fabric was obtained in exactly the same manner as in Example 3, except that the cross-sectional shape of the composite yarn was changed to the shapes shown in Figures 22, 3, and 4.

A fabric exhibiting a unique texture as in Example 3 was obtained.

Comparative Example-1 A fabric was obtained in exactly the same manner as in Example-3 except that the cross-sectional shape of the composite yarn was changed to the shape shown in Figures 1 and 4, but because the value of formula [1] was small, the fabric could not be obtained. The fabric was a bit fluffy (although the appearance was very ordinary plastic-like uniformity, and it was nothing more than a very ordinary filament fabric lacking in charm).

Comparative Example-2 As shown in Table-1, the cross-sectional shape of the composite yarn was the shape shown in Figures 71 and 3, and the single fineness was 5.3 dpralo, 7.
A fabric was obtained in exactly the same manner as in Example 3) except that the dpf was changed. Since the 1st grade fabric had a [1] formula value of 2 or more -, only a 4j fabric with a slightly firm and stiff texture could be obtained.

Comparative Example-3 Single yarn fineness of composite yarn is 2.7 dpf! The fabric was obtained in exactly the same manner as in Example 3, except for the following steps:
All I could get was a fabric with a loose texture.

Comparative Example-4 A fabric was obtained in exactly the same manner as in Example-3 except that the single yarn fineness of the composite yarn was 13.3 apr, but the fabric only had a firm and stiff texture. .

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[Brief explanation of drawings]

1 to 4 show schematic cross-sectional views of composite yarns used in the present invention. A: Eluted component, B: Residual component

Claims (1)

[Claims] (1) In a conjugate fiber yarn formed by combining one or more types of conjugate fibers, in which the remaining component is divided into a plurality of fibers by eluting part or all of the eluted component, the cross-sectional shape of the conjugate fiber is the eluted component. is a radial type surrounding the remaining component, and the remaining component has a denier structure that satisfies the following formula [1]. 0.5≦(d_a-d_b)/d_c≦2.0…[1]
d_a: Maximum denier of remaining components in composite yarn d_b:
Minimum denier of remaining components in the composite yarn d_c: Average denier of the remaining components in the composite yarn