JPH0711531A - Spun composite bulky yarn - Google Patents

Abstract

PURPOSE:To provide a spun composite bulky yarn capable of being converted into a highly dense yarn by a thermal treatment after being processed into a web, having good tension, body and elasticity, and capable of efficiently expressing the raw material characteristics of the spun yarn and the filaments. CONSTITUTION:The composite yarn comprises a spun yarn and filaments, both being blended and interlaced with each other. The filaments are latent crimping conjugate polyester fibers having a crimping degree of >=50% after a boiling water treatment, and the composite fibers comprise the spun yarn and the filaments mutually doubled and twisted in a twisting number satisfying the following relationship and in a direction reverse to the twisting direction of the spun yarn. 0.1t<=T<=t [T is the number of the doubling and twisting (T/M); t is the twisting number of the spun yarn (T/M)].

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun composite bulky yarn in which spun yarn and long fiber yarn are mixed and entangled.

[0002]

2. Description of the Related Art It is well known that by combining spun yarn and long fiber yarn, properties which cannot be obtained by a single yarn can be added. In the field of garments, there is a strong demand for diversification of materials. Today, the texture and appearance of conventional yarns cannot be satisfied, and bulkier yarns, yarns with more surface changes, such as texture, The advent of new composite yarns with improved appearance is desired.

Under these circumstances, many composite yarns in which spun yarns and long fiber yarns are mixed have been proposed, and as the mixing method, various methods such as ply twisting and fluid treatment are adopted. The present applicant also proposed in Japanese Patent Application No. 4-335074 a composite yarn in which a spun yarn and a filament yarn are mixed and entangled by fluid treatment. This composite yarn is capable of imparting bulkiness to the fabric by the mixed fiber effect of the spun yarn and the long fiber yarn and the difference in heat shrinkage between the yarns, and at the same time, can have material characteristics of both yarns. Since the long fiber yarn is a highly shrinkable yarn, it was possible to increase the density by heat shrinking the fabric.

However, in the above-mentioned composite yarn, a bulky and high-density fabric is simply formed by utilizing the difference in heat shrinkage between the two yarns, and since it lacks tension, waist, and elasticity, it is also limited in use. ， It was poor in versatility.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, presents a yarn form in which the mixed fiber entanglement of spun yarns and long fiber yarns is improved, and is improved by heat treatment after forming a fabric. It can be densified and has tension, waist and elasticity,
Moreover, it is a technical subject to provide a spun composite bulky yarn capable of effectively expressing the material properties of spun yarn and long fiber yarn.

[0006]

Means for Solving the Problems As a result of intensive studies for solving the above-mentioned problems, the present inventors have found that a latent crimpable conjugate fiber and a spun yarn, in which crimps develop after heat treatment, have a predetermined twist number. The yarn obtained by entanglement in the twist direction and then mixed and entangled is excellent in the mixed and entangled property, and the crimp of the latently crimpable conjugate fiber is developed by the heat treatment after forming the cloth, and The present invention has been accomplished by finding that bulge, tension, waist and elasticity are imparted, and that the density can be increased with the occurrence of crimps.

That is, the present invention is a composite yarn in which spun yarns and long fiber yarns are mixed and entangled, wherein the long fiber yarns have a single yarn fineness of 3 denier or more and a crimping ratio after boiling water treatment of 50%. The above-described polyester-based latently crimpable conjugate fiber, wherein the conjugate yarn has a twist number within a range satisfying the following formula, and the spun yarn and the continuous fiber yarn are combined in a direction opposite to the twist direction of the spun yarn. The gist of the invention is a spun composite bulky yarn characterized by being twisted. 0.1t ≦ T ≦ t where T: number of twists (T / M) t: number of twists of spun yarn (T / M)

Hereinafter, the spun composite bulky yarn of the present invention will be described in detail.

FIG. 1 is a schematic view showing an embodiment of the spun composite bulky yarn of the present invention before hot water treatment, and FIG. 2 is a schematic view of the spun composite bulky yarn of FIG. 1 after hot water treatment. is there.

In the spun composite bulky yarn of the present invention, as shown in FIG. 1, a spun yarn A and a long fiber yarn B are twisted around the entire yarn, and a single filament of the long fiber yarn bites into the spun yarn. The mixed fiber entangled portion (a) that is strongly entangled with the short fiber, the mixed fiber entangled portion (b) in which the spun yarn A is sandwiched between the filaments of the long fiber yarn B, and the like are randomly formed.

The yarn of the present invention is a entangled mixed entangled yarn in which a long fiber yarn is strongly entangled with short fibers inside the yarn yarn of the spun yarn as shown in FIG. In order to obtain the above yarn form,
It is necessary to untwist the spun yarn that has been twisted and bundled, improve the fiber openability, and perform fluid mixing processing. However, if the spun yarn is simply untwisted, not only will the strength of the spun yarn be reduced, but also short fibers will drop out or fall out. Therefore, the yarn of the present invention is twisted with the long fiber yarn for the purpose of eliminating untwisting and dropout caused by untwisting and untwisting action of the spun yarn. The twisting direction for this twisting should be opposite to the twisting direction of the spun yarn, and the number of twisting should be in the range that satisfies the above formula. When the spun yarn and the continuous fiber yarn are twisted together with the number of twists in the above range, the actual twist of the spun yarn itself is released, and the short fibers constituting the spun yarn approach a state in which they are aligned in parallel and It is possible to further enhance the fiber opening effect during the mixed fiber processing. If the short fibers come close to the parallel state, they may cause the dropout or dropout during the fluid mixing process, but the long fiber thread acts to suppress it, that is, it acts as a retainer thread for the spun yarn, causing dropout or dropout. And the spun composite bulky yarn of the present invention can be stably obtained.

The spun yarn constituting the spun composite bulky yarn of the present invention is preferably a single yarn, but may be a double yarn. When using twin yarns, twisting in the opposite direction to the twin yarn (upward twist) with the long fiber yarns will untwist the spun yarns and enhance the fiber mixing effect during fluid mixing processing. It becomes possible.

When the spun yarn and the long fiber yarn are twisted together as described above, the actual twist of the spun yarn can be released and the opening of the spun yarn can be promoted. Twisting may be added, which may interfere with the opening action of the long fiber yarn itself. Therefore, it is preferable to use the fine fiber yarn as long as possible so that the long-fiber yarn has a twist angle within a range that does not hinder the opening operation even if the number of twists is added.

The number of twists of spun yarn and long fiber yarn is 0.
If it is less than 1 t, the untwisting effect of the spun yarn is poor and it becomes difficult for the single filament of the long fiber yarn to bite into the spun yarn.
It is not preferable because strong confounding cannot be expected. Further, when the number of ply twists exceeds t, the number of ply twists is excessively added to the long fiber yarn itself, and the fiber-spreading action of the long fiber yarn itself is remarkably reduced during the fluid mixing process, which causes an obstacle to the mixed fiber entanglement. Not preferable.

Next, the long fiber yarn constituting the spun composite bulky yarn of the present invention is a large fineness yarn having a single yarn fineness of 3 denier or more, preferably 4 denier or more, and is crimped after boiling water treatment. It is necessary that the latent latent crimpable conjugate fiber has a ratio of 50% or more.

As shown in FIG. 2, the spun composite bulky yarn of the present invention has elasticity by shrinking the entire yarn in a wavy shape as the latent crimpable conjugate fiber develops crimps as shown in FIG. It becomes a bulky yarn form. Therefore, the spun composite bulky yarn of the present invention can increase the density of the fabric in the dyeing process after the knitting and weaving due to the crimping property of the long fiber yarn. That is, the shrinkage force due to the latent crimp development of the long fiber yarn is developed without being constrained by the fabric structure, and the fabric shrinks, resulting in a high-density fabric. As the fabric shrinks, the bulkiness increases, and the fabric becomes excellent in tension, waist, and elasticity.

In order to fully develop latent crimps by hot water treatment, it is necessary to use polyester latent crimpable conjugate fibers having a crimping ratio of 50% or more after boiling water treatment. In the latently crimpable conjugate fiber having a crimp ratio of less than 50%, the crimp development power is poor and the shrinkage of the fabric is insufficient, so that the densification and stretchability cannot be imparted. Further, if the single yarn fineness is less than 3 denier, it is not possible to impart sufficient tension and waist to the fabric.

The spun composite bulky yarn of the present invention has a strong entanglement as a whole yarn, is extremely well twisted and bundled, and is excellent in post-processability. In addition, since the single filament of the long fiber yarn is irregularly mixed with the spun yarn, and the spun yarn and the long fiber yarn are twisted and mixed to form a filament form,
By selecting spun yarns and long fiber yarns having different dyeing properties, it is possible to obtain a spun composite bulky yarn which is a heavier fabric with a good heather feel and which is rich in elegance.

The latent crimpable conjugate fiber used in the present invention is not particularly limited as long as it is a polyester type multifilament yarn having a large single yarn fineness and latent crimping characteristics, but two kinds having different heat shrinking characteristics. The latently crimpable conjugate fiber obtained by joining the polyester component of (1) in a side-by-side type is preferably used.

The spun yarn may be any fiber such as natural fiber, synthetic fiber, semi-synthetic fiber and recycled fiber, but it is preferable to use sweet twist spun yarn from the viewpoint of enhancing the entanglement.

Next, an example of a method for producing the spun composite bulky yarn of the present invention will be described with reference to the drawings. FIG. 3 is a schematic process drawing showing an example of a method for producing a spun composite bulky yarn of the present invention, in which a spun yarn 1 in which a spun yarn and a continuous fiber yarn are pre-twisted in a predetermined number of twists and twist directions,
It is supplied from the supply roller 2 to the fluid treatment zone in an overfeed state, and the air injection nozzle 4 provided between the supply roller 2 and the take-up roller 3 performs a fluid mixing process to obtain a span composite bulky yarn, which is packaged via the take-up roller 3. Roll up to 5.

The air injection nozzle provided in the fluid treatment zone for interlacing and spun the spun yarn and the continuous fiber yarn is not particularly limited as long as the yarn form of the present invention can be obtained. A Taslan nozzle is preferably used.

The crimp ratio after boiling water treatment in the present invention is measured by the following method. First, double the polyester multi-filament yarn that has been collected five times with a measuring machine, hang it on a stand under a load of 1/6000 (g / d) and leave it for 30 minutes, and then keep boiling water while maintaining this state. Put it inside and leave it for 30 minutes. Then, remove from boiling water, air-dry for 30 minutes, apply a load of 1/500 (g / d), and measure length a. Next, remove the load and apply a load of 1/20 (g / d) to the length b
To measure. Then, the crimp rate after boiling water treatment is obtained from the following equation. Crimp ratio (%) = [(b−a) / b] × 100

[0024]

EXAMPLES Next, the present invention will be specifically described by way of examples. In addition, the intrinsic viscosity [η] in the examples was measured at 20 ° C. using an equal weight mixed solvent of phenol and ethane tetrachloride.

Example 1 A polyethylene terephthalate spun yarn (English count: 40) having a twisting number of 750 T / M (Z) and a polyester-based latent crimpable conjugate fiber of 50d / 12f were used and mixed by a twisting machine. Number of twists 300T
Both yarns were plied with / M (S). Using this plied yarn,
3% overfeed rate, Taslan nozzle air pressure 4kg / cm ² , supply roller speed 250m /
A spun composite bulky yarn was produced by fluid mixing with min.

The polyester-based latently crimpable conjugate fiber used in the above is the ultimate copolymer of 8 mol% isophthalic acid and 5 mol% 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane. Polyethylene terephthalate having a viscosity [η] 0.50 as the first component and polyethylene terephthalate having an intrinsic viscosity [η] 0.68 as the second component, which is a side-by-side composite fiber obtained by composite spinning and drawing, and is crimped after boiling water treatment. The rate was 69%.

The obtained spun composite bulky yarn was in the form of a yarn in which spun yarn and long fiber yarn were naturally integrated and mixed and entangled. This spun composite bulky yarn was used as a warp and a weft, and was woven into a plain design at a normal density and then dyed.

The obtained woven fabric is densified due to the crimp development during hot water treatment, and the bulkiness is increased and stretched.
It was a high-density fabric with excellent elasticity and elasticity.

Example 2 A spun composite bulky yarn was produced in the same manner as in Example 1 except that a cotton yarn having a twist number of 690 T / M (Z) (English count: 40) was used as the spun yarn.

When the obtained spun composite bulky yarn was made into a woven fabric in the same manner as in Example 1 and subjected to a dyeing finishing treatment with a different color dye, it exhibited a fluffy mercerized cotton-like texture and was easy to dry. A heathered woven fabric was obtained.

[0031]

EFFECT OF THE INVENTION The spun composite bulky yarn of the present invention is obtained by subjecting a spun yarn and a filament yarn that have been twisted and bundled to each other in a predetermined number of twists and in a predetermined twisting direction, and then subjected to a fluid mixing treatment. Therefore, it exhibits a yarn form with further improved mixed fiber entanglement. The crimp development of the long-fiber yarn having the latent crimping property makes it possible to impart a bulge, a tension, and a waist accompanying shrinkage to the fabric, which is suitable as a stretchable yarn for a high-density fabric. is there. Further, it is possible to make a spun composite bulky yarn that can effectively have the material characteristics of long and short fibers and can be applied to heather products as well.

[Brief description of drawings]

FIG. 1 is a schematic external view showing an embodiment of a spun composite bulky yarn of the present invention.

FIG. 2 is a schematic view of the spun composite bulky yarn of FIG. 1 after hot water treatment.

FIG. 3 is a schematic process drawing showing an example of a method for producing a spun composite bulky yarn of the present invention.

[Explanation of symbols]

 A spun yarn B long fiber yarn a mixed fiber entangled part b mixed fiber entangled part 1 mixed twisted yarn 4 air injection nozzle 5 winding bobbin

Claims (1)

[Claims] 1. A composite yarn in which spun yarns and long fiber yarns are mixed and entangled, and the long fiber yarns have a single yarn fineness of 3 denier or more and a crimping ratio after boiling water treatment of 50% or more. -Based latent crimpable conjugate fiber, wherein the conjugate yarn has a twist number within a range satisfying the following formula, and the spun yarn and the continuous fiber yarn are twisted in a direction opposite to the twist direction of the spun yarn. A spun composite bulky yarn characterized by that. 0.1t ≦ T ≦ t where T: number of twists (T / M) t: number of twists of spun yarn (T / M)