JP2002038346A - Spunlike textured yarn and fabric using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a light spunlike textured yarn having heat insulating proper ties while keeping soft touch feelings, and a fabric using the spunlike textured yarn. SOLUTION: This spunlike textured yarn comprises a polyester multifilament hollow yarn having an eyeglasses type cross-sectional shape in which a sheath yarn or a core yarn or both have two hollow parts independent in the longitudinal direction and 1.3-3 flatness of the filament cross section and 20-40% hollowness and the number of loop fluffs having >=0.7 mm fluff length is 10-100 loop fluffs/m in the loop fluffs formed in the surface layer part of the textured yarn. Furthermore, the fabric uses the spunlike textured yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a spun-like yarn and a fabric using the same. More specifically, the present invention relates to a spun-like yarn which is lightweight when it is made into a fabric and has both excellent heat retention and a soft feel, and a fabric using the same.

[0002]

2. Description of the Related Art Conventionally, many spun-like yarns and fabrics having multi-filaments but having a span-like texture and appearance have been proposed. And fabrics using the same are known.

[0003] In recent years, instead of a multifilament having only such a span-like texture and appearance, advanced functions such as water-absorbing quick-drying property, light-weight property, and heat-retaining property, and soft feeling,
It is required to have good texture such as swelling feeling. For the purpose of improving the lightness and heat retention as a fabric, various types of hollow fibers having hollow portions in the cross section of the filament have been developed. In order to improve the lightness and heat retention of the multifilament, it is effective to increase the hollow ratio of the filament, but on the other hand, the bending stress of the filament increases, the texture tends to be hard, and the texture is flexible. However, there is a problem that it is difficult to obtain the above cloth.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spun-like yarn which is lightweight, has excellent heat retention and has a soft texture when formed into a fabric, and a fabric using the same. .

[0005]

Means for Solving the Problems To solve the above-mentioned problems, the present inventors have made a multi-filament having a hollow into a specific spun-like processed yarn, so that the fabric is lightweight, excellent in heat retention and flexible. The present inventors have found that a fabric having a good texture can be obtained, and have accomplished the present invention. That is, according to the present invention, the sheath yarn and / or the core yarn have an eyeglass-shaped cross-sectional shape having two hollow portions independent in the longitudinal direction of the filament, and the flatness of the filament is 1.3 to 3,
A spun-like yarn comprising a polyester multifilament hollow fiber having a hollow ratio of 20 to 40%, wherein a loop having a fluff length of 0.7 mm or more among loop fluffs formed on a surface layer of the spun-like yarn. The number of fluff is 10
The spun-like yarn is 100 yarns / m, and the spun-like yarn is used for part or all of the fabric.

The polyester used in the present invention is polyethylene terephthalate in which at least 90 mol% comprises a repeating unit of ethylene terephthalate. The polyester of the present invention may contain less than 10 mol% of other polyester components. As other polyester components,
For example, aliphatic dicarboxylic acids (oxalic acid, adipic acid, etc.), alicyclic dicarboxylic acids (cyclohexane dicarboxylic acid, etc.), aromatic dicarboxylic acids (isophthalic acid, sodium sulfoisophthalic acid, etc.), aliphatic glycols (ethylene glycol, 1,2-propylene glycol, tetramethylene glycol, etc.), alicyclic glycol (cyclohexanediol, etc.), aromatic dioxy compound (hydroquinone bisphenol A, etc.), aliphatic glycol containing aromatics (1,4-bis (β- Hydroxyethoxy) benzene, etc.), polyether glycols (such as polyethylene glycol and polypropylene glycol), aliphatic oxycarboxylic acids (such as ω-oxycaproic acid), and aromatic oxycarboxylic acids (such as p-oxybenzoic acid).

Compounds having one or more ester-forming functional groups (such as benzoic acid or glycerin)
Can be used as long as the polymer is substantially linear. Further, two or more of these copolymer components may be copolymerized. If necessary, matting agents such as titanium dioxide, stabilizers such as phosphoric acid, ultraviolet absorbers such as hydroxybenzophenone derivatives, zirconia, alumina, silica,
UV shielding agents such as titanium oxide, barium sulfate, calcium carbonate, boron nitride, strontium aluminate, and zinc sulfide; titanium nitride, zirconium carbide, titanium carbide, hafnium, tantalum, antimony-containing tin oxide, indium-containing tin oxide, carbon, etc. Heat storage agents, crystallization nucleating agents such as talc, lubricating agents such as aerosil, antioxidants such as hindered phenol derivatives, flame retardants, antistatic agents, pigments, fluorescent brighteners, infrared absorbers, heat-resistant agents, and luminous agents And additives such as antibacterial agents and deodorants.

As the type of fiber, POY yarn, FOY yarn and the like are preferably used. As the spinning method, a direct drawing method (spin draw or spin take-up method) in which a spinning-drawing step is directly connected is preferable. In addition, a false twisted yarn may be used as long as the hollow ratio of the hollow fiber is not reduced by the cross-sectional deformation during the false twisting. The cross-sectional shape of the polyester multifilament hollow fiber used in the present invention is an eyeglass type having two hollow portions independent in the longitudinal direction of the filament.

The glasses type of the present invention refers to a shape in which two independent hollow portions exist in the cross section of the filament. The outer shape of the filament cross section may be a shape having a constriction between two hollow portions like an eight-letter shape or a shape having no constriction like an oval shape. In the eyeglass-shaped cross section of the present invention, it is necessary to have a continuous hollow portion in the longitudinal direction of the filament in the cross section of the filament.
If the filament cross section has no hollow portion or only one hollow portion, the lightness and heat retention are poor, and the object of the present invention cannot be achieved. The size of the two independent hollow portions does not necessarily need to be the same, but is preferably substantially the same from the viewpoint of spinning stability. Further, the filament outer shape is preferably symmetrical with respect to the two independent hollow portions.

The flatness of the filament cross section of the polyester multifilament hollow fiber used in the present invention is 1.
Must be 3 to 3. If the flatness is less than 1.3,
The texture becomes hard, which is not preferable. When the flatness exceeds 3, the texture becomes soft, but it is difficult to increase the hollow ratio, and there is a disadvantage that the yarn is bent immediately below the spinneret at the time of producing the filament and stable production cannot be performed. Absent. The flatness here is determined by a method described later.

The hollow ratio of the polyester multifilament hollow fiber used in the present invention must be 20 to 40%. If the hollow ratio is less than 20%, the lightness and heat retention are poor, and the object of the present invention cannot be achieved. If the hollow ratio exceeds 40%, the lightness increases and the heat retention improves, but not only the bending stress becomes excessively high, but also the spunability of the spun-like yarn becomes poor. Also, the texture of the fabric becomes hard. In addition, such filaments having a large hollow ratio increase yarn breakage immediately below the spinneret during production, making stable production difficult and increasing the fineness fluctuation value U% in the yarn length direction. Has the disadvantage of being non-uniform. In order to combine lightness, heat retention and soft texture when made into a fabric, the hollow ratio is 25 to 35%.
It is preferred that

Since the specific gravity of polyethylene terephthalate is about 1.35 to 1.38, the hollow ratio is 25 to 2
In the case of 7%, the apparent specific gravity becomes about 1.0. The hollow ratio can be determined by a method described later. Polyester multifilament hollow fiber used in the present invention, in addition to the cross-sectional shape characteristics, heat shrinkage stress, and, preferably,
Furthermore, by specifying the bending properties of the filament,
It is possible to manufacture a hollow fiber for obtaining a fabric having both heat retention and soft texture.

The polyester multifilament hollow fiber used in the present invention has a small bending stress in spite of a high hollowness, and therefore has a lightweight, heat retaining property and a soft feeling which cannot be achieved by the conventional multifilament. it can. The bending stress of the polyester multifilament hollow fiber used in the present invention is 10 × 10 ⁻³ cN / dte.
x or less. The bending stress is an index of the bending hardness of the multifilament measured by a “continuous bending measuring device” described later.

When the bending stress exceeds 10 × 10 ⁻³ cN / dtex, it tends to be difficult to develop a soft hand. If the single fiber fineness is constant, the bending stress increases as the hollow ratio increases. The smaller the bending stress, the more the fabric can have a softer texture. The filament bending stress is more preferably 6 × 10 ⁻³ cN /
dtex or less, more preferably 5 × 10 ⁻³ cN / dte
x or less. The single-fiber fineness of the polyester multifilament hollow fiber used in the present invention is preferably 0.5 to 4 dtex, and more preferably 1 to 3 dtex. If the single yarn fineness exceeds 5 dtex, the texture tends to be hard.

A typical example of a method for forming the spun-like processed yarn of the present invention using the above-mentioned polyester multifilament hollow fiber is a fluid jetting process. With fluid jetting, the sheath yarn and the core yarn are entangled while overfeeding,
This is a method of obtaining a spun-like processed yarn having a structure in which a core yarn is entangled with a sheath yarn. By making the feed rate difference between the sheath yarn and the core yarn ([feed ratio of the sheath yarn]-[feed ratio of the core yarn]) at the time of fluid jetting, a spun-like yarn having a sheath-core structure is obtained. Here, the core yarn refers to a supply yarn having a small feed rate, and the sheath yarn refers to a supply yarn having a large feed rate. The feed rate of the supply yarn to the fluid ejection nozzle may be arbitrarily set, but the feed rate of the core yarn is set to + 5% to + 5%.
By setting the feed rate of the 20% sheath yarn to +10 to + 40% and the feed difference to +5 to + 30%, a spun-like processed yarn having a sheath core structure in which the sheath yarn is relatively distributed on the surface of the processed yarn is obtained. The feed rate of the core yarn and the sheath yarn may be the same. In this case, by setting the feed ratio to +5 to 40%, a spun-like yarn that does not have a sheath-core structure can be obtained. If the feed rate is less than 5%, the loop fluff becomes insufficient, and if it exceeds 40%, the loop fluff increases, which is not preferable. The fluid ejecting nozzle used in the fluid ejecting process is not particularly limited as long as it forms loop fuzz.

In addition, as long as the lightness of the spun-like processed yarn of the present invention is not impaired, a processed yarn such as another multifilament raw yarn or false twist yarn may be used for the sheath yarn or the core yarn. May be polyester multifilament, polyamide multifilament, acrylic multifilament, or regenerated cellulose multifilament such as cupra, visco-rayon and polynosic rayon. In this case, the mixing ratio of the polyester multifilament hollow fiber used in the present invention is 20.
% Or more, more preferably 40% or more.
If it is less than 20%, the apparent hollowness of the spun-like yarn becomes low, and the lightness is impaired.

The processing speed during the fluid jet processing may be arbitrarily set, but is in the range of 50 to 600 m / min, preferably 100 to 500 m / min. If it is less than 100 m / min, the productivity is poor, and if it exceeds 600 m / min, the entanglement between the multifilaments becomes weak. The fluid ejection pressure at the time of fluid ejection processing is in the range of 0.3 to 1 MPa, and preferably in the range of 0.4 to 0.9 MPa. If it is less than 0.3 MPa, the entanglement between the multifilaments becomes weak, and 1MPa
If it exceeds a, thread breakage or the like may occur, which is not preferable. Further, by applying an appropriate amount of water to the supply yarn at the time of the fluid jet processing, the entanglement between the multifilaments can be made stronger and more uniform.

Further, a POY yarn of a polyester multifilament hollow fiber used in the present invention for the sheath yarn and / or the core yarn,
Or when using other polyester multifilament or polyamide multifilament POY yarn,
After performing thermal stretching at an arbitrary set stretching temperature and stretching ratio using a hot pin or the like of a fluid ejecting machine, the fluid is supplied to a fluid ejecting nozzle to perform fluid ejecting.

In the present invention, of the loop fluff formed on the surface layer, the number of loop fluff having a fluff length of 0.7 mm or more is 10 to 100 / m, preferably 30 to 80 / m.
Pieces / m. If it is less than 10 yarns / m, the spun-like texture peculiar to the spun-like yarn is impaired,
If the number exceeds 100 pieces / m, a fastener phenomenon occurs, and the openability, weaving property and knitting property at the time of weaving and knitting are inferior. Further, in the present invention, preferably, among the loop fluffs formed on the surface layer, the number of loop fluffs having a fluff length of 0.35 mm or more is six.
00 to 1500 pieces / m, more preferably 700 to 13
A value of 00 / m is preferable because the spun-like texture peculiar to the fluid jet processing yarn is most exhibited. If it is less than 600 yarns / m, the spun-like texture peculiar to the fluid jet processed yarn may be impaired, and if it exceeds 1500 yarns / m, it is difficult to manufacture the yarn.

In the present invention, a fabric means a woven or knitted fabric. Representative examples of the woven structure of the present invention include any structure including plain weave, twill weave, satin weave, warp double weave, weft double weave, dobby weave, and the like.
0-350 lines / inch and a weft density of 60-150 lines / inch are preferred. The knitted structure of the present invention may be any of a flat knit, a circular knit, and a warp knit, and the knitting gauge is preferably 18 to 32 gauge.

The fabric of the present invention includes those using the spun-like yarn of the present invention and those partially used. The fabric partially using the spun-like yarn of the present invention may be used in combination with other fibers and processed yarns within a range that does not impair the object of the present invention. In this case, the spun-like yarn of the present invention is reduced by 20%. The content is preferably at least 40%, more preferably at least 40%. The greater the content of the spun-like yarn of the present invention, the greater the lightness, heat retention, and flexibility of texture, which are features of the present invention. As the yarn used in combination with the spun-like yarn of the present invention at the time of fabric processing, the original yarn or false twist yarn of the polyester multifilament hollow yarn used in the present invention may be used. It is preferable to use a false twisted yarn that is false twisted under a small number of conditions. In this case, the lightness, the heat retention and the flexibility of the hand, which are the characteristics of the present invention, are not impaired.

The use in combination with other fibers or processed yarns is not particularly limited, and may be appropriately selected according to the use, function, and the like. For example, natural fibers such as cotton, hemp, wool, silk, etc., regenerated fibers such as cupra, rayon, semi-synthetic fibers such as acetate, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate,
Synthetic fibers such as polyamide, acrylic, polyethylene, and polyvinyl chloride, and processed yarns and composite yarns thereof can be used.

The fabric using 100% of the spun-like yarn of the present invention has excellent lightness, heat retention, and a soft texture different from the fabric obtained by the conventional spun-like yarn using polyester fibers. ing. In addition, the knitted fabric of the present invention, depending on the application, use form, water absorbing agent,
Water repellent, heat storage agent, ultraviolet shielding or absorbing agent, antistatic agent,
The function may be imparted by various processes such as an antibacterial agent, a deodorant, an insect repellent, a phosphorescent agent, and a retroreflective agent.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically by way of examples. Each physical property in the present invention was measured by the following methods. (1) Hollowness ratio Five cross-sectional photographs were arbitrarily taken from the filament, and the cross-sectional photographs were integrated and determined. (2) Flatness A rectangle circumscribing the cross section of the cross section photograph of the filament was calculated from the ratio of the short axis to the long axis of the rectangle. (3) Bending stress Continuous bending measuring machine manufactured by Micronics CV-
The bending stress of the multifilament was measured using Model 101. The measurement was performed in a total of 25
The average value was divided by the multifilament decitex to obtain a bending stress. (4) Number of loop fluffs The number of loop fluffs projecting 0.7 mm or more from the yarn surface of the spun-like processed yarn is determined by Toray photoelectric fluff measuring device TO
Using RAY FRAY COUNTER DT-104, yarn speed 10 m / min, running yarn tension 0.1 g / d
It was measured under the condition of tex.

(5) Detachability The degree of hooking of the spun-like yarn wound around the yarn tube when the yarn is unwound is determined based on the following criteria. ◎: very good with no catching ○: very good with little catching ×: poorly with many catching (6) Lightweight Judged by expert on the following criteria. ◎: very light ○: light ×: inferior (heavy) (7) Texture Judged by a skilled person based on the following criteria. ◎: very flexible ○: flexible ×: inferior (hard) (8) Comprehensive evaluation The evaluation was made on the basis of the following criteria based on the evaluation of the openness of the processed yarn and the balance between the lightweight and the flexibility of the fabric. ◎: Excellent in tearability, extremely excellent in lightness and flexibility ○: Excellent in tearability, excellent in lightness and flexibility ×: Easy to remove, lightness and flexibility Lack one of

[0026]

EXAMPLE 1 58 dtex / 24 as sheath yarn and core yarn
f, Fluid injection processing was performed using a polyester multifilament hollow fiber having a filament cross-sectional shape of 8 (flatness 2.2, hollow ratio 30%) to obtain a spun-like processed yarn. The obtained spun-like processed yarn was knitted in a sheet-laying structure using a 28GG single circular knitting machine, and then subjected to hydrophilic processing to obtain a fabric. <Fluid injection processing conditions> Processing speed 400m / min Air injection pressure 0.7MPa Nozzle Hema jet T-311 Feed rate Core thread + 8% Sheath thread + 22% Water applied Yes (200cm ³ / min) <Hydrophilic processing> Hydrophilic processing Agent SR-1000 (manufactured by Takamatsu Yushi Co., Ltd.) 5% omf Bath ratio 1:40 Treatment condition Boil × 30 minutes

[0027]

Example 2 58 dtex / 24 as sheath yarn and core yarn
f, A spun-like processed yarn and a fabric using the same were obtained in the same manner as in Example 1 except that a polyester multifilament hollow fiber having a filament cross-sectional oval type (flatness 2.0, hollow ratio 28%) was used.

[0028]

Example 3 A polyester multifilament hollow fiber of 72 dtex / 24f, filament cross-section oval type (flatness: 2.2, hollow ratio: 32%) was used as a sheath yarn, and 56 dtex / 48f, a filament cross-section was round as a core yarn. A spun-like yarn and a fabric using the same were obtained in the same manner as in Example 1 except that a polyester multifilament having a flatness of 1 and a hollow ratio of 0% was used.

[0029]

Example 4 Polyester multifilament of 40 dtex / 24f, round cross section of filament (flatness 1, hollow ratio 0%) is used as a sheath yarn, and 72 dte is used as a core yarn.
x / 24f, filament cross-sectional figure 8 (flatness 2.
A spun-like yarn and a fabric using the same were obtained in the same manner as in Example 1 except that a polyester multifilament hollow fiber having a hollow ratio of 30%) was used.

[0030]

Comparative Example 1 84 dtex / 36 as sheath yarn and core yarn
f, Filament cross section round shape (flatness 1, hollow ratio 0)
%), And a spun-like yarn and a fabric using the same were obtained in the same manner as in Example 1 except that the polyester multifilament was used.

[0031]

Comparative Example 2 58 dtex / 24 as sheath yarn and core yarn
f, filament cross section round shape (flatness 1, hollow ratio 3)
0%), and a spun-like yarn and a fabric using the same were obtained in the same manner as in Example 1 except that the polyester multifilament hollow fiber was used.

[0032]

Comparative Example 3 58 dtex / 24 as sheath yarn and core yarn
f, A spun-like yarn and a fabric using the same were obtained in the same manner as in Example 1 except that a polyester multifilament hollow fiber having a filament cross-sectional shape of figure 8 (flatness 2.0, hollow ratio 10%) was used. Was.

[0033]

Comparative Example 4 72 dtex / 24 as sheath yarn and core yarn
f, A spun-like processed yarn and a fabric using the same were obtained in the same manner as in Example 1 except that a polyester multifilament hollow fiber having a filament cross-sectional shape of figure 8 (flatness 2.0, hollow ratio 42%) was used. Was.

[0034]

Comparative Example 5 58 dtex / 24 as sheath yarn and core yarn
f, Example 1 except that a polyester multifilament hollow fiber having a filament cross-sectional shape of figure 8 (flatness 2.2, hollow ratio 30%) was used, and the feed rate of the sheath yarn during fluid jetting was 12%. In the same manner as in Example 1, a spun-like yarn and a fabric using the same were obtained.

[0035]

Comparative Example 6 58 dtex / 24 as sheath yarn and core yarn
f, Example 1 except that a polyester multifilament hollow fiber having a filament cross-sectional shape of figure 8 (flatness 2.2, hollow ratio 30%) was used, and the feed rate of the sheath yarn during fluid jetting was 40%. In the same manner as in Example 1, a spun-like yarn and a fabric using the same were obtained.

[0036]

Comparative Example 7 58 dtex / 24 as sheath yarn and core yarn
f, A spun-like processed yarn and a fabric using the same were obtained in the same manner as in Example 1 except that a polyester multifilament hollow fiber having a filament cross-sectional shape of figure 8 (flatness 1.2, hollow ratio 25%) was used. Was.

Table 1 summarizes the results of the number of fluffs, the puffing properties, the lightness, the texture, and the overall evaluation of the spun-like processed yarns obtained in Examples 1 to 4 and Comparative Examples 1 to 7. It was shown to.

[0038]

[Table 1]

As is evident from Table 1, the spun-like yarn of the present invention is excellent in the openability, and the fabric using the spun-like yarn of the present invention has excellent lightness and texture. .

[0040]

The spun-like yarn of the present invention has a specific cross-sectional shape and specific fiber characteristics despite having a high hollow ratio, and therefore, when used in a fabric, it is lightweight, heat insulating and flexible. It can exhibit characteristics that have a natural texture.

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Claims (2)

[Claims] The sheath yarn and / or the core yarn have an eyeglass-shaped cross-sectional shape having two hollow portions independent in the longitudinal direction of the filament, and the filament has a flatness of 1.3 to 1.3.
3. A spun-like yarn made of a polyester multifilament hollow fiber having a hollow ratio of 20 to 40%, and the length of the loop-like fluff formed on the surface layer of the spun-like yarn is 0.7 mm or more. Wherein the number of loop fluffs is 10 to 100 / m. 2. A fabric using the spun-like yarn according to claim 1 for a part or all of the fabric.