JPH01306637A - Core spun yarn - Google Patents

Abstract

PURPOSE:To obtain the subject yarn suitable for thin knitted and woven fabric such as leg parts of panty hoses, by using any synthetic fiber filament yarn as a core yarn and covering periphery of said yarn with specific hydrophilic staple fiber in specific state. CONSTITUTION:20-35 fibers of hydrophilic staple fiber mainly composed of cellulosic fiber having 0.9-1.5 denier average size are arranged on periphery of a core yarn made of synthetic fiber filament and the core yarn is covered with said hyrophilic fibers. Weight construction ratio (size) of synthetic fiber filament yarn in core yarn is set in 15-55%. A thin core spun yarn having at least No.100 yarn count with excellent moisture absorption is obtained.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a core spun yarn that is thin and has excellent hygroscopicity and is suitable for manufacturing extremely thin knitted fabrics such as the leg portions of pantyhose. be.

(Conventional Technique 1) A crimped nylon filament yarn of approximately 7 to 20 deniers is used as a yarn for extremely thin knitted fabrics, for example, for the leg portions of pantyhose. Further, as a fine spun yarn made of staples, 200 count cotton yarn is known, and this cotton yarn is used as a broad yarn after being made into double yarns.

(Problems to be Solved by the Invention) The crimped nylon filament yarn used in the leg portions of conventional pantyhose is extremely thin as a knitting yarn, so the resulting knitted fabric has a sense of transparency and has excellent fashionability. Although it can make women's legs look beautiful, it has inferior hygroscopicity compared to cellulose fibers such as cotton fibers and animal fibers such as wool, and feels stuffy when worn. In addition, although cotton thread has excellent hygroscopicity, it is made by twisting short staples together and is kept in a long thread shape by the frictional force between the staples. It is difficult to knit and weave compared to filament yarns of the same thickness, and the above-mentioned 200 count cotton yarns have also been used as double yarns.

On the other hand, as a composite yarn of filament and stable, core spun yarn is known, in which a filament yarn is used as a core yarn and a sheath layer surrounding the core yarn is formed with staples. Core-spun yarn using fibers is stronger and has better hygroscopicity than spun yarn of the same count, but the thinness of conventional core-spun yarn is limited to around 80 count, which is equivalent to about 66 denier. Core spun yarns thinner than this have not been produced because they are considered difficult to manufacture or have no use. Therefore, when the above-mentioned core spun yarn is used for the leg portions of pantyhose, there is a problem that the yarn lacks transparency, lacks fashionability, and has a tights-like appearance.

The present invention provides a core spun yarn that can be made thinner than 100 count and used as a single yarn, has excellent moisture absorption, and is suitable for manufacturing extremely thin GM products such as the leg portions of pantyhose. It is something.

(Means for Solving the Problems) In order to solve the above problems, in the core spun yarn of the present invention, the staples of the sheath layer are made of cellulose fibers with an average fineness of 0.9 to 1.5 denier. Hydrophilic fiber staples are used, and 20 to 35 of the hydrophilic fiber staples are placed around the core yarn of the synthetic fiber filament to cover it. Then, the fineness of the core yarn is set so that the composition ratio of the core yarn is 15 to 55% of the weight of the core spun yarn. The effective fiber length of the hydrophilic fiber staple is preferably 37 to 60 nn, and the variation (range) in the number of fibers arranged around the core yarn is preferably 15 or less.

The hydrophilic fiber staple used in the sheath layer of this invention is mainly composed of cellulose fibers such as cotton, rayon, and polynosic, and any of these fibers may be used alone or in combination.
It is also possible to use a blend of more than one species, but the average fineness is 0.
It is set to 9 to 1.5 denier. In particular, when using cotton fibers, high quality cottons such as Egyptian cotton and Sea Island cotton are preferred.

Note that, if necessary, a small amount of animal fiber such as wool, preferably 10% or less, may be blended.

In addition, the synthetic fiber filament yarn used as the core yarn is an elastic filament yarn having rubber-like elasticity such as polyurethane elastic yarn or polyester elastic yarn, or a regular synthetic fiber filament yarn for clothing such as nylon or polyester, and is non-crimped. The yarn may be crimped or crimped yarn obtained by crimping such as false twisting or pressing, and is appropriately selected depending on the end use such as pantyhose, tricot, lawn, etc.

The number of filaments constituting the synthetic fiber filament yarn may be one or more, and the total fineness is preferably 8.5 so that the composition ratio is 15 to 55% by weight as described above. It is set to ~22 denier. The preferred twist coefficient (English system) for twisting the core spun yarn is 3.0 to 4.5.

(Function) The average fineness, the number of arranged hydrophilic fiber staples in the sheath layer, and the weight composition ratio of the synthetic fiber filament yarn in the core yarn (
By selecting a core spun yarn with a diameter of 100' or more, a core spun yarn with a diameter of 100' or more can be obtained. However, if the number of hydrophilic fiber staples arranged is less than 20, there will be problems such as peeling during ironing or lack of moisture absorption, and the core yarn will be exposed. , the core spun yarn obtained becomes too thick and the object of the invention cannot be achieved. Also,! ! If the average fineness of the aqueous fiber staple is less than 0.9 denier, the stable strength will be insufficient and spinning will be difficult.On the other hand, if it exceeds 1.5 denier, the number of arrayed fibers will be insufficient or the core spun yarn will The core spun yarn that is the object of this invention cannot be obtained because the thickness becomes too large. Further, if the composition ratio of the core yarn is less than 15%, the strength as a core spun yarn is insufficient and it is not practical.On the other hand, if it exceeds 55%, the thickness becomes excessively large.

In addition, the core spun yarn of the present invention is produced by supplying braided yarn made of the above-mentioned hydrophilic fiber staples to the back roller of a spinning machine, and giving a relatively low draft rate between it and the front roller to create an even fleece. The core yarn is supplied under tension to the rear side of the front roller and overlapped at the center of the width of the fleece, and then both are sent out from the front roller and wound onto a bobbin while being heated to sheath the core yarn. However, by using hydrophilic fiber staples with an effective fiber length of 37 to 60+ nm for the sheath layer, unevenness in the width of the fleece and the number of its constituent fibers can be reduced. It becomes easier. That is, when a hydrophilic fiber staple with an effective fiber length of less than 37 strokes is used, the above-mentioned unevenness becomes large, and the core yarn is likely to be exposed in a part of the core spun yarn.

As the non-uniformity of the fleece increases, the non-uniformity in the number of hydrophilic fiber staples surrounding the core yarn increases, and if the range exceeds 15, a portion of the core yarn tends to be exposed, which is undesirable. Furthermore, if the number of twists of the core spun yarn is small and the twist coefficient is less than 3.0, the sheath layer of the hydrophilic fiber staple will easily peel off;
．． If it exceeds 5, coarse and hard dust becomes too large and the soft texture is lost, which is not preferable.

(Example 1) Egyptian cotton (average fineness 1.2 denier, effective fiber length 38
Cotton roving (65 gelen/30 yards) obtained from mn)
is fed to the back roller of the ring spinning machine, giving a total draft of 42.0 times, while 3.0 denier polyurethane filament is fed from above the front top roller.
The cotton fiber fleece and polyurethane filament sent out from this front roller are fed to the rear side of the front roller while being drafted three times, and overlapped with the center part of the cotton fiber fleece obtained by drafting the cotton roving.
The yarn was twisted 9.1 times/2.54 times and wound around a bobbin to obtain a 130-count core spun yarn with a polyurethane filament as the core yarn and covered with cotton fiber. The weight composition ratio of the core yarn of this core spun yarn is 16%, and the average number of cotton fibers surrounding this core yarn is 27 when the core spun yarn is measured at 10 locations at 1 m intervals, and the maximum is 27. The smallest difference was 9 lines. In addition, when pantyhose were knitted using this core spun yarn and the cotton fibers were piece-dyed, the coverage was good, there was no exposed part of the core yarn, and there were no problems in terms of physical properties. It also had good hygroscopicity, felt good on the skin, had a good fit, was transparent, and had excellent fashionability.

(Example 2) The cotton roving used in Example 1 was fed to the backrow of a spinning machine to give a total draft of 46 times.Meanwhile, 10 denier 5 filament nylon multifilament yarn was fed from above the front top roller. It was fed at a draft ratio of 0 times and twisted at 49.1 twists/2.54 an to obtain a 130 core spun yarn.

The composition ratio of the core yarn (nylon multifilament yarn) of this core spun yarn was 26%, and when the number of cotton fibers was measured in the same manner as in Example 1, the average was 26, and the difference between the maximum and minimum was 10. Met.

Regular 120 count cotton yarn is used for the warp and 130ffi core spun yarn is used for the weft, and the warp density is 1.
80 threads/2.54am, weft density 140 threads/2.54
When a lawn fabric was prototyped with each CIll setting, a fabric with sufficient strength, light weight, flexibility, little yarn unevenness, good texture, and high aesthetics similar to silk fabric was obtained. .

(Example 3) 55 gelens/30 yards of cotton roving made of the same raw cotton as in Example 1.2 was fed to the spinning machine, giving a total draft of 42.0 times, while 13
1.0 denier 5 filament nylon false twisted yarn
The yarn was fed at double draft ratio and twisted at 49.1 turns/2.540 m to obtain core spun yarn of No. 130. The weight composition ratio of the core yarn (nylon false twisted yarn) of this core spun yarn was 33%, and when the number of cotton fibers was measured in the same manner as in Example 1.2, the average was 24, and the maximum and minimum. The difference was 10 lines.

The obtained core spun yarn was used as a full set for the front bar and back bar of a 28 gauge tricot machine to create a half structure (35 courses/2.54G, 28
Wale/2.54 master), date ff1148g
#r? When finished and used as interlining material for women's clothing, it was thin and
It was light and well-balanced, had sufficient knitting strength after raising, and had good adhesion to the outer fabric, making it extremely suitable as a lightweight interlining for women's clothing.

(Effects of the Invention) According to the present invention, the core yarn is made of any synthetic fiber filament yarn including elastic fiber yarn, false twisted yarn, etc., and the periphery is covered with a hydrophilic fiber stable such as cotton fiber. −
A thin core spun yarn, which could not be obtained conventionally, can be obtained, and since the number of stable fibers in the sheath layer surrounding the core yarn is set to 20 or more, the covering condition is good, the core yarn is not exposed, and the sheath layer The fibers are not easily peeled off by ironing, have 70% moisture absorption, and are highly practical for use in punched chairs and other thin gf fabrics.

Patent applicant: Toyama Boseki Co., Ltd. Agent: Patent Attorney Yoshi 1) Tsukasa Ryo

Claims (1)

[Scope of Claims] [1] A core spun yarn consisting of a synthetic fiber filament core yarn and staples forming a sheath layer thereof, wherein the staples of the sheath layer are mainly composed of cellulose fibers and have an average fineness of 0. The hydrophilic fiber staples are 9 to 1.5 deniers, the number of the hydrophilic fiber staples present in any cross section of the core spun yarn is 20 to 35, and the composition ratio of the core yarn is the weight of the core spun yarn. 15~
55% core spun yarn.