JP2001081639A - Combined filament yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a combined filament yarn sufficiently having a unique feeling of an acetate fiber and excellent in stretchability by interlacing an acetate fiber multifilament yarn with a polytrimethylene terephthalate fiber multifilament yarn. SOLUTION: This combined filament yarn is obtained by carrying out entangling filament combination by so-called interlacing filament combination of an acetate fiber multifilament yarn and a polytrimethylene terephthalate fiber multifilament yarn. The acetate fiber multifilament yarn is a fiber composed of cellulose acetate and is referred to a yarn composed of diacetate having 54-56% acetyl content or triacetate having 61-62% acetyl content. The form of the fiber is a filament and a multifilament raw yarn having about 0.1-5 denier of single filament denier is preferred. The polytrimethylene terephthalate fiber multifilament yarn is referred to a polyester fiber yarn having trimethylene terephthalate unit as a main recurring unit and preferably comprising >=90 mol% of the trimethylene terephthalate unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed fiber yarn, and more particularly, to a mixed fiber yarn having a sufficient texture of acetate fiber and excellent stretchability.

[0002]

2. Description of the Related Art Acetate fibers are favorably used in fashionable women's outwear because of their dry touch, refreshing sensation and vivid coloration. However, garments made of acetate fibers tend to wrinkle when worn, and are liable to be damaged by washing or the like due to low strength, and have a practical problem. In order to improve such disadvantages, there have been proposed many composites of a polyester fiber made of polyethylene terephthalate and the like. However, although the strength and wrinkles of the fabric are all improved, the waxy touch unique to the polyester fiber is added, and the texture unique to the acetate fiber is impaired.

For example, JP-A-7-305265 discloses that an acetate multifilament yarn (A) having a single yarn denier of 1.5 de or less and a polyester multifilament (B) having a single yarn denier of 3.0 de or less are used. The weight ratio A: B is mixed and entangled within the range of 60:40 to 75:25, then, after strong twisting, twisting is stopped, the yarn is woven into a weft, and the fabric is relaxed. Then, a method of expressing grain is disclosed, and by this method, an acetate fabric having a soft texture, drape property, and uniform and sharp grain has been proposed. However, such mixed yarn not only impairs the texture of the acetate fiber but also has insufficient elasticity.

Japanese Patent Application Laid-Open No. HEI 9-195142 discloses that a core yarn is made of a polyester having a limiting viscosity of 0.8 or more and a main component of which is polypropylene terephthalate, and a chemical fiber is formed as a sheath yarn around the core yarn. And / or a yarn composed of natural fibers and having a core component and a sheath component in a weight ratio of 2/8 to 8/2. Since the composite yarn is excellent in the initial texture and has excellent elasticity, it can provide a woven or knitted fabric in which the texture does not deteriorate even after the elongation and recovery. However, although such composite yarns have elasticity, a large yarn length difference cannot be provided,
A soft texture with a feeling of swelling could not be obtained.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a mixed fiber having a characteristic texture of acetate fibers and a soft texture with swelling and excellent stretchability.

[0006]

The inventor of the present invention has conducted a detailed study on fibers which are composite with acetate fiber yarns. As a result, the composite mixed yarn with polytrimethylene terephthalate fiber yarn has a texture of acetate fiber. Without compromising
The present inventors have found that they have an epoch-making feature having a swelling soft texture and elasticity, and have completed the present invention. That is, the present invention is a mixed fiber comprising a mixture of an acetate fiber multifilament yarn and a polytrimethylene terephthalate fiber multifilament yarn.

Hereinafter, the present invention will be described in more detail. The acetate fiber multifilament yarn in the present invention is a fiber made of cellulose acetate, and has an acetylation degree of 54 to 54.
It refers to a thread composed of 56% diacetate and triacetate having a degree of acetylation of 61 to 62%. Further, the form of the fiber is a long fiber, and a multifilament raw yarn (including an ultrafine yarn) having a single denier of about 0.1 to 5 deniers is preferable. Processed yarn may be used.

In the present invention, the polytrimethylene terephthalate fiber yarn is a polyester fiber having trimethylene terephthalate unit as a main repeating unit, and the trimethylene terephthalate unit contains about 50 mol% or more, preferably 70 mol% or more. Further, it refers to a compound having a mole percentage of 80 mol% or more, and more preferably 90 mol% or more. Therefore, the total amount of the other acid component and / or glycol component as the third component is within a range of about 50 mol% or less, preferably 30 mol% or less, further 20 mol% or less, and more preferably 10 mol% or less. Polytrimethylene terephthalate contained.

[0009] Polytrimethylene terephthalate is produced by condensing terephthalic acid or a functional derivative thereof with trimethylene glycol or a functional derivative thereof in the presence of a catalyst under appropriate reaction conditions. In this production process, one or more suitable third components may be added to form a copolymerized polyester, or
Polyesters other than polytrimethylene terephthalate such as polyethylene terephthalate, nylon, and polytrimethylene terephthalate may be separately manufactured and then blended or composite-spun (sheath core, side-by-side, etc.).

The third components to be added include aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexane dicarboxylic acid, etc.), and aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.). ), Aliphatic glycols (ethylene glycol, 1,2
-Propylene glycol, tetramethylene glycol, etc.), alicyclic glycols (cyclohexanediol, etc.), aromatic dioxy compounds (hydroquinone bisphenol A, etc.), aliphatic glycols containing aromatics (1, 4
-Bis (β-hydroxyethoxy) benzene, etc.), polyether glycols (polyethylene glycol, polypropylene glycol, etc.), aliphatic oxycarboxylic acids (ω
-Oxycaproic acid), aromatic oxycarboxylic acids (P
-Oxybenzoic acid, etc.). Also one or three
Compounds having more than one ester-forming functional group (such as benzoic acid or glycerin) can also be used as long as the polymer is substantially linear.

Further, matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, crystallization nucleating agents such as talc, lubricating agents such as aerosil, and antioxidants such as hindered phenol derivatives. An oxidizing agent, a flame retardant, an antistatic agent, a pigment, a fluorescent whitening agent, an infrared absorbing agent, an antifoaming agent and the like may be contained. In the present invention, the spinning of the polytrimethylene terephthalate fiber is 1500 m /
After spinning at a winding speed of about minutes to obtain an undrawn yarn,
A method of twisting at about 3.5 times, a direct drawing method (spin draw method) in which a spinning-drawing step is directly connected, and a winding speed of 5000 m /
Any of high-speed spinning methods (spin take-up method) for more than one minute may be employed.

Further, the form of the fiber is a long fiber, which may be uniform or thick in the longitudinal direction, and may have a round, triangular, L-shaped, T-shaped, Y-shaped or cross-sectional shape. It may be a polygonal type such as a W type, an eight leaf type, a flat type, a dog bone type, a multi-leaf type, or a hollow type. Further, as the form of the yarn, a multifilament raw yarn (including an ultrafine yarn) having a single denier of about 0.1 to 5 deniers is preferable, but a sweet twisted yarn, a false twisted yarn (a drawn false twisted yarn of POY is used). Bulky yarn such as air-injected yarn. In addition, other known fibers such as natural fibers, regenerated cellulose fibers, and synthetic fibers represented by wool may be mixed in a known mixing means (for example, silo) within a range of not more than 50% by weight within a range not to impair the object of the present invention. Fill, entangled mixed fiber (different shrinkage mixed fiber with high shrinkage yarn, etc.), twisting,
A composite false twist (elongation difference false twist or the like) or a means such as two-feed air jet processing may be used.

In the present invention, the acetate fiber multifilament yarn and the polytrimethylene terephthalate fiber multifilament yarn are entangled and mixed by so-called interlace mixing to form a mixed yarn. The weight mixing ratio (A / B) of the acetate fiber multifilament yarn (A) and the polytrimethylene terephthalate fiber multifilament yarn (B) is 20 to 80/80.
-20, preferably 30-70 / 70-30, and more preferably 40-60 / 60-40. Incidentally, other known fibers such as natural fibers, regenerated cellulose fibers and synthetic fibers may be mixed by a known mixing means within a range of 50% by weight or less, preferably 30% by weight or less.

[0014] The total denier of the acetate fiber multifilament yarn used for blending is preferably 20 d to 150 d, and the total denier of the polytrimethylene terephthalate fiber multifilament yarn is preferably 20 d to 150 d. The number of confounds is 30 to 150 / m, preferably 50 to 1
00 / m is good, and if it is less than 30 / m, both yarns may be separated in secondary processing such as weaving and weaving.
Even if the number of entanglements exceeding 0 / m is given, there is almost no effective difference, and conversely, problems such as thread breakage tend to occur. If necessary, the polytrimethylene terephthalate fiber multifilament yarn may be mixed with an acetate fiber multifilament yarn after passing the multifilament yarn through a hot plate or a hot pin. , 150 ° C to 180 ° C. In interlacing, it is more preferable to supply multitrimethylene terephthalate fiber multifilament yarn with an overfeed of about 2 to 5%.

The mixed fiber of the present invention is optimally used at no twist to about 200 T / m, but may be additionally twisted at a medium twist to a strong twist as required. As the fabric using the mixed fiber yarn of the present invention, as a knitting structure, half tricot, warp knitting such as Russell, India, smooth, rubber, Milan rib,
Any of circular knitting and flat knitting such as punch roma may be used,
The gauge is 14-40GG for warp knitting and 14-4 for circular knitting.
0GG and 3-22GG in flat knitting are preferred. The weaving structure may be any of a single weave such as a plain weave, a twill weave, and a satin weave, a stacked structure, a pile structure, and a leno weave. Also, the weaving density is not particularly limited. In knitting and weaving, if necessary, the fibers may be cross-knitted with other fibers such as polyester fibers such as natural fibers, regenerated cellulose fibers, acetate fibers, polyethylene terephthalate fibers, and polytrimethylene terephthalate fibers, and nylon fibers. Further, when dyeing the knitted woven fabric of the mixed fiber, it may be performed according to a conventional method, for example, scouring, bleaching, dyeing (dispersed dye), and finishing (water repellent processing, flexible processing, etc.) are performed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to examples and the like, but the present invention is not limited to the examples and the like. In addition, texture evaluation was performed by the following method. <Hand feeling evaluation><Acetate hand feeling> Compared with acetate 75d / 75d taffeta, sensory evaluation was performed according to the following five grades. Grade 5: Very texture similar to acetate. Grade 4; texture similar to acetate. Class 3; Neither. Second grade; texture not resembling acetate. Grade 1; texture not resembling acetate at all.

<Soft feeling, swelling feeling> The following five levels were evaluated by sensory evaluation. Grade 3 or higher was rated good. Grade 5: Very soft and swelling. Grade 4: sufficiently soft and swelling. Grade 3: Soft feeling and swelling feeling. Grade 2: Soft feeling and swelling feeling are insufficient. Grade 1: poor softness and swelling.

<Method for Producing Polytrimethylene Terephthalate Fiber> Polytrimethylene terephthalate having ηsp / c = 0.8 is spun at a spinning temperature of 265 ° C. and a spinning speed of 1200 m / min to obtain an undrawn yarn. 60
C., a hot plate temperature of 140.degree. C., a draw ratio of 3, and a drawing speed of 800 m / min. To give a 40d / 24f drawn yarn. The strength, elongation, elastic modulus, and elastic recovery at 10% elongation of the drawn yarn are 3.2 g / d, 46%, and 30 g, respectively.
/ D and 98%. The elastic recovery at 10% elongation was determined by the following method. Fiber to chuck distance 1
It was attached to a tensile tester at 0 cm, stretched at a stretching rate of 20 cm / min to an elongation rate of 10%, and left for 1 minute. Thereafter, the material is contracted again at the same speed, and a stress-strain curve is drawn.
During shrinkage, the elongation when the stress becomes zero is the residual elongation (A)
And The elastic recovery was determined according to the following equation. Elastic recovery at 10% elongation = [(10-A) / 10] ×
100 (%) Further, ηsp / c is obtained by dissolving the polymer in O-chlorophenol at a concentration of g / deciliter at 90 ° C., then transferring the obtained solution to an Ostwald viscometer and measuring at 35 ° C. Was calculated by ηsp / c = [(T / T0) -1] / C T: Fall time of sample solution (second) T0: Fall time of solvent (second) C: Solution concentration (g / deciliter)

[0019]

Example 1 Diacetate multifilament yarn 55d
/ 55f and the polytrimethylene terephthalate multifilament yarn 40d / 24f (2% overfeed) obtained above were entangled at 80 yarns / m by interlacing to obtain a 95d / 79f mixed yarn. The elastic recovery of the obtained mixed fiber at 10% elongation was as excellent as 85%. After weaving a plain woven fabric using the mixed fiber as a warp and a weft and relaxing and scouring with 90 ° C. hot water,
A heat set at 60 ° C. was performed. The obtained plain woven fabric had stretchability and was excellent in softness (5th grade) and swelling (4th grade) in addition to the texture (5th grade) peculiar to acetate fiber.

[0020]

Comparative Example 1 Diacetate multifilament yarn 55d
/ 55f and polyethylene terephthalate yarn 40d / 24
f Interlacing of 80 yarns / m was given by interlacing to obtain a 95d / 79f mixed yarn. 1 of the obtained mixed fiber
The elastic recovery at 0% elongation was inferior to 40%. Plain fabrics were woven using the mixed yarns as warps and wefts, relaxed and scoured with 90 ° C. hot water, and then heat-set at 160 ° C. The obtained plain fabric has a swelling feeling (4
), But poor stretchability, impaired texture unique to acetate fibers (grade 3), and poor softness (grade 2).

[0021]

Comparative Example 2 Using a covering machine, polytrimethylene terephthalate multifilament yarn 40d / 24f
Diacetate multifilament yarn 55d / 55f
And a covering yarn 95d / 79f having a polytrimethylene terephthalate multifilament yarn as a core component and a diacetate multifilament yarn as a sheath component.
I got The elastic recovery of the obtained covering yarn at 10% elongation was as excellent as 80%. Plain fabrics were woven using the covering yarns as warp yarns and weft yarns, relaxed with 90 ° C hot water, and then heat-set at 160 ° C. The obtained plain woven fabric has stretchability and a texture (grade 5) peculiar to acetate fibers, but has a swelling feeling (2).
Grade) and soft feeling (grade 2).

[0022]

Industrial Applicability According to the present invention, it is possible to provide a mixed fiber having a characteristic texture of acetate fiber and a swelling soft texture and excellent stretchability.

Claims (1)

[Claims] 1. A mixed fiber comprising a mixture of an acetate fiber multifilament yarn and a polytrimethylene terephthalate fiber multifilament yarn.