JPS6039426A - Fluid composite spun yarn and its production - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fluid composite spun yarn and a method for terminating the same.

(Prior Art) Conventionally, discontinuous fibers, that is, fluids are applied to short fiber bundles to create entanglement between the single m and vertebrae that constitute short fiber bundles, or short fiber bundles have been created. The single fibers in the outer layer of the Jt vertebral bundle are wound around the short fiber bundle to give convergence to the short fiber bundle and make it into a yarn. A spun yarn with a new aggregate structure has been developed.

Figure 1 is a process diagram showing an example of spinning yarn by applying a fluid to it, in which 1 is a tow made of continuous fibers, and the tow is passed through a delivery roller 5 and the delivery roller 5.
The short fiber fleece is produced by stretching, tension cutting, and drafting between the tension cutting rollers 9 rotating at a higher speed, and then the short fiber fleece is carried out from the tension cutting roller 9 by a fluid take-up nozzle jOK having a suction action. A fluid binding nozzle IIK having a swirling action imparts binding to the fiber fleece, and the winder 14
This means winding it up.

However, these yarns and threads sent in this way have the advantage of being able to produce Km with much higher efficiency than ordinary spun yarns, but they tend to have a lot of neps and uneven thickness, making them difficult to put to practical use. The disadvantage was that quality could not be obtained. That is,
In order to give the short fiber bundle sufficient strength to withstand the weaving process or #rope process with only fluid treatment without imparting real twist like ordinary spun yarn, K requires the action of a correspondingly strong fluid. As a result, the 7-lead fibers on the outer periphery of the short fiber bundle tend to be disturbed, and this causes them to wrap around the fiber bundle in extremely localized lumps, forming loops and slack, resulting in defects such as so-called neps and slabs. In addition, if sufficient convergence cannot be imparted, the fiber bundles will be ununiformly drawn and the thickness will be uneven, especially when measured with a Worcester spectrometer.
There were also disadvantages such as an increase in the number of defects classified as lnK.

Furthermore, these drawbacks include wrapping, twisting, and gluing.

It also has the property of increasing and growing easily as it goes through processes such as winding, weaving, and knitting, making it quite difficult to handle.

On the other hand, attempts have also been made to form composite spun yarns by aligning short fiber bundles with yarns such as filament yarns and subjecting them to fluid treatment.

This has the natural appearance and texture of so-called spun yarn, which is mainly made of short wiry fibers.

Attempts have been made to take advantage of both the excellent functionality of filament yarns, and this method can be expected to greatly improve the strength of the above-mentioned untwisted spun yarns.

However, when short fibers and filaments are combined, when the filaments are exposed on the surface of the composite yarn, the difference in dyeing or shape difference between the short fibers and the filaments tends to appear as spots on the product's appearance, which reduces the commercial value. However, there is a problem in that the filament yarn forms the core and short fibers form the sheath. Therefore, even in this case, the free fibers at the outer periphery are 61. There is no change in the fact that the yarn tends to be easily twisted, and as with the case of the non-twisted spun yarn, there is a problem that defects such as neps and slabs are likely to occur.

(Objective of the Invention) An object of the present invention is to improve the drawbacks of conventional fluid-treated spun yarns, and to provide a fluid-treated spun yarn with less neps and thick unevenness and sufficient strength, and a method for producing the same. It's about doing.

(Structure of the invention) That is, the present invention combines discontinuous fibers and continuous fibers,
A composite spun yarn obtained by fluid treatment, wherein the discontinuous fibers are made of ultrafine fibers with a fineness of 0.8 denier or less, and the continuous fibers are made of thick denier fibers with a fineness of 1.2 denier μ or more. , the discontinuous fibers have a core-sheath structure mainly arranged in the outer layer of the yarn and the continuous fibers in the inner layer of the yarn, and both fibers are partially intertwined with each other. In a method for producing a composite spun yarn by combining discontinuous fibers and continuous fibers and subjecting them to fluid treatment, the discontinuous fibers have a fineness of O, S denier or less. As the continuous fibers, thick denier fibers with a fineness of 1.2 denier μ or higher are used. It can be manufactured by making the amount of overfeed larger than the amount of overfeed for thick denier fibers.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 2 is a process diagram showing an example of the engineering department for carrying out the present invention.
], 00 De is a drawn tow with a single yarn denier of 0.5 de, which is stretched and drawn between a delivery roller 5 and a nitrogen cutting roller 9 that rotates at a high speed of 21 times the circumferential speed of the delivery roller. Cut to obtain short fiber fleece 6 equivalent to 100 count (@ count). On the other hand, 2 is all denier 50D
e.

Single yarn denier 2. The yarn is made of Ode's polyester multifilament yarn, and is subjected to a tension of 15 g by a strong straightening device 3, passes through a guide 4, and is suctioned and carried out from a first take-up roller 7 by a fluid take-up nozzle 10 having a suction action and a swirling action. Short fiber fleece equivalent to 100 count 6
Then, the filament yarn 2 is taken up in an aligned state, and then passed through a fluid binding nozzle 11 having a binding action to intertwine the short fiber fleece 6 with the filament yarn 2. The composite spun yarn 12 is pulled out from the second take-up roller 13, and then -14 is rolled up into cheese 15.

Here, the circumferential speed of the first take-up roller 70 needs to be lower than the circumferential speed of the tension cutting roller 9. That is, when the circumferential speed of the first take-up roller is faster than the speed of the tension cutting roller, the tension of the short fiber fleece 6 becomes equal to or higher than the tension of the filament yarn 2 supplied to the first take-off roller 7. However, when the filament yarn is subjected to the conjugation process from the fluid conjugation nozzle IIK between the first take-up roller 7 and the second take-up roller 130, the filament yarn tends to be exposed to the outside of the composite spun yarn as a loop or slack, which can cause fabrics and knitted fabrics to This is because if the fabric is sent, the surface of the fabric will become unsightly, and unevenness will occur due to differences in dyeing, resulting in a poor quality appearance.

Therefore, although it depends on the filament supply tension, the circumferential speed of the first take-up roller 7 needs to be at least 2 inches slower than the circumferential speed of the tension cutting roller 9.

Further, the position where the filament yarn 2 is supplied and aligned to the short fiber fleece 6 may be anywhere between the tension cutting roller 9 and the first take-up roller 7, such as the front part of the tension cutting roller 9 in FIG. 9 and the fluid binding nozzle 11. Further, it is preferable that the distance between the tension cutting roller 9 and the first take-up roller 7 be shortened to 1.2 times the average fiber length of the short fiber fleece 6 or less. That is, in the case of , there is almost no conjugation between the filament yarn and the 7 leases of short fibers, so if the distance is made longer than the average fiber length of the 7 leases of short fibers x 1.2,
This is because the number of floating fibers that are not gripped by either the tension cutting roller 9 or the first take-up roller 7 increases, making it easier to break the yarn.

Here, the tow l may be made of polyester, polyamide, acrylic, aromatic polyamide, or other materials as long as it is made of continuous filaments, and if the single yarn denier is 0.8 denier or less after tension cutting, the cross-sectional shape and original The board etc. can also be selected as appropriate depending on the purpose. Regarding filament thread 2,
The above-mentioned fibers can be used as long as they are continuous yarns with a single yarn denier of 1.2 denier or more, and are not limited to multifilament yarns, such as spun yarns (synthetic fibers).

(including natural fibers) can be used, and is not particularly limited. Further, the filament yarn 2 may be supplied in one piece or in plural pieces. However, it is preferable that the amount of filament yarn is at least 40 degrees or more of the entire splicing yarn.

Further, the fluid binding nozzle 11 may have 70 or more fluid injection holes having a cross-sectional area smaller than this, more preferably at right angles to the thread guide hole. Note that the central axis of the fluid injection hole may intersect with the central axis of the thread guide hole, or may be eccentric. Furthermore, a plurality of fluid injection holes may be used.

(Action of the invention) Generally, when a short fiber bundle is subjected to fluid treatment to impart convergence, the problematic neps are those that are wrapped around the outer WJK of the short fiber bundle, or that have many loops or slacks in a lump. It is one end of the tied short fiber, and it is made up of 1
It consists of one or several short fibers.

This does not change much even if the denier, single yarn denier, etc. of the spun yarn obtained by fluid treatment (referred to as μ-lower, untwisted spun yarn), etc. are changed. In other words, if the denier of the untwisted spun yarn is the same, the thinner the single yarn denier is, or if the denier of the single yarn is the same, the thicker the denier of the untwisted spun yarn, and the amount of lumpy fibers in the nep section is the same as that of the normal yarn. It tends to be relatively small compared to the amount, and the NEP tends to become less noticeable not only in the NEP value measured with a Worcester spot measuring device but also in the appearance of the product. In particular, the effect of single yarn denier is large, and the t43 diagram shows the conspicuousness of neps in the product depending on the single yarn denier, but if the single yarn denier is set to 0.8 denier or less, there is no problem in terms of product quality. improve to the standard.

Here, FIG. 3 is a diagram showing the relationship between the single yarn denier and the product appearance based on the neps. A woven fabric was made by using 40 count (fine count) and 80 count polyester untwisted spun yarns of various single yarn deniers sent using the process shown in Figure 1 into the weft yarn. It was dyed brown with a color blend dye and subjected to sensory evaluation.

However, if the denier of the K single yarn is made extremely thin, problems such as the product's texture will become too soft, stiff and stiff, and lack versatility will arise. Therefore, in the present invention, the buccal fiber bundle having a single yarn denier of 0.1'1 denier or less is compounded with another thread, a pulling end, to improve the texture. Thick yarns are used depending on the product for which a single yarn denier of From the figure,
As is clear, the effect cannot be obtained unless it is at least 1.2 denier. In addition, the amount of continuous edges (hereinafter referred to as "aligned yarns") is also important, and sufficient effects cannot be obtained unless they account for at least 40% of the total. 5KL, it is necessary to ensure that it is not too exposed to the outer periphery of the yarn. That is, if the aligned threads are exposed on the outer periphery of the composite yarn, the difference in dyeing and shape will cause the appearance of the product to be uneven, which is unfavorable in terms of quality.

The present invention will be explained below with reference to Examples.

(Example 1) Using the process shown in Figure 2, tow 1 has a total denier of 1
30De, single yarn denier 0.45de, moisture content 0.
4%, opu Q, t 1 (i) A multifilament yarn made of polyester fiber was used, and the filament yarn was cut with a tension cut draft ratio of 3.7 times at a tension cut part having a length of 750 m, and the filament thread was Count) equivalent average fiber length 3
25g1 of short fiber IJ-6 was cut. On the other hand, filament 2 has a total denier of 50De1. Single thread 2. Using Odo's polyester multifilament yarn, a tension of 2011 was applied by the tension adjustment device 3 to cut the short fiber fleece 6KFIIt cutter 9 to 200.
At the position of 250111 mm, the rollers are pulled together through the alignment guide 4, separated from the tension cutting roller 9 by 250111, and taken up by a pair of first pulling rollers 7 that rotate at a circumferential speed 34) slower than the peripheral speed of the tension cutting sealer 9. Pressurized air E2.
Conjugation treatment was performed with 511/d.

In the obtained composite spun yarn 12, the core portion is mainly occupied by filament yarn, the sheath portion is mainly occupied by short fiber fleece, and the filament yarn and short fibers 7 wreaths are densely intertwined with each other to form neps and uneven thickness. It was very uniform.

Next, a high-density fabric was made using a water jet loom using 1 mm ester multifilament yarn with a total denier of 50 Da and a single yarn denier of 1.39 for the warp yarn and the composite spun yarn according to the present invention for the weft yarn. A high-quality fabric with a texture and appearance very similar to high-grade cotton fabrics made from sea island cotton was obtained. Furthermore, when the fabric was subjected to oral finishing and water-repellent finishing, a fabric with extremely low air permeability, good water-repellency, and excellent functionality was obtained, making it extremely suitable for sports clothing and the like.

The iron-manufacturability of tako is due to the fact that the short fibers have a long average fiber length (perhaps because there is little fuzz, so there is less fluff), and the filament yarns are aligned in the core, giving them sufficient strength. It was in very good condition with few cuts.

(Effects of the Invention) The fluid composite spun yarn obtained by the method of the present invention obtained by pressing as described above has almost no neps, little unevenness in thickness, is non-flammable, and has sufficient strength to withstand weaving and knitting. It can be used not only for span looms, but also for various innovative looms such as filament looms and water jet looms.

In addition, the composite spun yarn produced by the method of the present invention has a structure in which the core is mainly formed by filament yarn and the sheath is formed by short fiber fleece. The appearance can be varied over a wide range and the single yarn denier of the core filament yarn can be changed.

You can freely change the texture etc. Sara K.

Since the short fibers in the sheath are made of extremely thin single fibers of 0.8 denier or less, a composite spun yarn with very good core coverage can be obtained.

[Brief explanation of drawings]

FIG. 1 is a process side view showing an example of the process of applying a fluid to produce a spun yarn. FIG. 2 is a process @both diagrams showing an example of a process for carrying out the present invention. FIG. 3 is a diagram showing the relationship between single yarn denier and product appearance based on neps. FIG. 4 is a diagram showing an example of the relationship between the single yarn denier of continuous ffl fibers (aligned yarns) and applicable products. 1 illustrator 2 illustrator

Claims (1)

[Scope of Claims] 1. A composite spun yarn obtained by combining discontinuous fibers and continuous fibers and subjecting them to fluid treatment, wherein the discontinuous fibers are composed of ultrafine fibers with a fineness of OOS denier or less, and When the core continuous fibers are thick denier fibers on *W 1,2 f =−μ, both K. 1 & Discontinuous fibers have a core-sheath structure mainly arranged in the outer layer of the thread, and continuous fibers have a core-sheath structure arranged in the inner part of the thread sash, and both the core and both fibers are partially intertwined with each other. Fluid composite spun yarn. 2. The yarn according to claim 9N, wherein the content ratio of discontinuous fibers in the entire system is 6o1 or less. 3. A method for producing a composite spun yarn by combining discontinuous fibers and continuous fibers and subjecting them to fluid treatment, using ultrafine fibers with a fineness of 0.8 denier or less as the discontinuous fibers;
A thick denier fiber with a fineness of 1.2 denier or more is used as the continuous fiber, and the two iron fibers are aligned and supplied to the fluid treatment nozzle. 1? tL, a method for producing a fluid composite spun yarn, characterized in that the overfeed amount of the cough microfiber vertebrae is larger than the overfeed amount of the thick denier rim.