JPS602715A - Preparation of conjugated spun yarn - Google Patents

Abstract

PURPOSE:To obtain the titled yarn having both feeling and characteristics of spun yarn and filament, by cutting filaments between lead-on rollers and cutting rollers to give short fiber fleece, arranging it and another yarn properly, drawing them, passing them through a fluid combining nozzle. CONSTITUTION:The yarn tow 1 consisting of filaments or multifilament yarn is cut into the short fiber fleece 6 between lead-on rollers 5 and a pair of cutting rollers 9 rotating at higher peripheral speed than that of the lead-on rollers. The short fiber fleece 6 fed from the cutting rollers 9 and the yarn 2 are arranged properly by the arranging guide 4, drawn in this state by the first drawing rollers 7, successively passed through the fluid combining nozzle 11 so that incorporating properties are produced between them, and they are wound by the winder 14, to give the desired cheese 15 of the conjugated spun yarn 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a high-performance composite spun yarn that has both the texture and appearance of a spun yarn and the excellent texture and functionality of filaments. .

Conventional technology Conventionally, a composite spun yarn of short M fibers and long broken filaments has been produced by using a spinning machine in the spinning process to supply filament yarn to the drafted roving and composite it into a ring traveler.
A so-called core-span technique is known in which the material is wound while adding actual twist. However, since this method is used for actual twisting, the spinning speed is very low, at most 10 to 20 r.
It has the disadvantage that it is limited to a low speed of n/rrin, and the amount of winding is small, resulting in a considerably high manufacturing cost.

On the other hand, recently, research and development has been carried out on a no-twist spinning method or a bundled spinning method, which has a fundamentally different manufacturing principle from conventional spinning methods, and it is becoming possible to produce spun yarn with extremely high efficiency. That is, FIG. 1 is a process diagram showing an example, in which the tow made of continuous fibers is stretched and stretched between a delivery roller 5 and a tension cutting roller 9 that rotates at a higher speed than the delivery roller 5. The short fiber fleece is cut and drafted into a short fiber fleece, and then the short fiber fleece is carried out from the drag cutter roller 9 by a fluid take-up nozzle 10 having a suction action.The short fiber fleece is then conjugated by a fluid conjugation nozzle 11 having a button turning action. Then, the winder 14 winds it up.

Unfortunately, the inventors have already utilized this fluid-based method for producing spun yarn, supplying another yarn at high tension to the tension-cutting roller 9, and drawing, tension-cutting, and drafting the yarn by the tension-cutting roller. We have proposed a method for producing composite spun yarn, which is characterized in that it is composited with short-fiber fleece and subjected to fluid treatment while maintaining the tension state of the yarn supplied to the tension cutting roller (Japanese Patent Application No. 1983). -18093).

According to this method, a composite spun yarn in which the continuous yarn and short fiber fleece are intertwined very well can be obtained. However, in this method, when production is carried out for a long time, one rubber roller of the tension cutting roller 9 is easily worn out by the yarn supplied to the tension cutting roller with high tension, and tension cutting spots are likely to occur. In addition, when producing high-grade yarns such as No. 80 or higher, when yarn is fed to the tension cutting roller, the tow during tension cutting is affected by the yarn, resulting in uneven nip of the tow. It was found that this method induces stretch cut spots.Furthermore, in this method, the circumferential speed of the take-up roller is too slow compared to the circumferential speed of the stretch cut roller, so it is difficult to obtain a bulky composite spun yarn. etc. were found out.

OBJECT OF THE INVENTION An object of the present invention is to improve a method for producing a composite spun yarn with low efficiency in conventional spinning methods. That is, a method for producing composite spun yarns that can be produced stably at high speed and over a long period of time, from large yarn count to high yarn yarn count, using the above-mentioned spinning method using fluid, and that has good texture and appearance. Our goal is to provide the following.

The structure of the invention, that is, the present invention provides a delivery roller and a pair of tension cutters r1- which rotate at a peripheral speed higher than the peripheral speed of the delivery roller.
In the method for producing spun yarn, in which the continuous long fiber fleece is passed through a fluid binding nozzle between the fibers and the fibers to impart binding properties between the fibers and form a thread, the short fiber fleece carried out from the tension cutter is A pair of first drawn p-
This is a method for producing a composite spun yarn, which is characterized in that it is taken up by a sear and then passed through a fluid binding nostle to impart binding properties between the two.

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

FIG. 2 shows a step showing an example of the method of the present invention, where l is made of polyester long fibers with a total denier of 1100 denier and a single yarn denier of 0.5 denier. This is an lIF drawn tow, which is stretched and cut between the feed roller 5 and the tension cutter sheath 9 which rotates at a high speed of 21 @ the circumferential speed of the skeleton feed roller to produce a material equivalent to 1001 hands (cotton count). short fiber fleece 6. At this time, a trough-like guide 8 is provided to prevent the drawn tow from being disturbed by the accompanying air flow. On the other hand, 2 has a triangular cross section with a total denier of 50 deniers and a single yarn tenier of 1.4 deniers. It is a polyester multifilament yarn with a tension g1 of 10.9 applied by the tension adjusting device 3, passed through the guide 4, and is sucked and carried out from the first take-up roller 7 by a fluid take-up nozzle having a suction action and a swirling action. Then, the short fiber fleece 6 equivalent to 100 count and the fiber 1 are collected in a concave depression, and then passed through a fluid binding nozzle 11 having a swirling action to intertwine and wind the short fiber fleece 6 around the filament yarn 2. The composite spun yarn 12 is pulled out from the second take-up roller 13 and wound up as cheese 15 by the winder 14.

Here, it is necessary that the circumferential speed of the first take-up p-sea 7 is lower than the circumferential speed of the tension cutting roller 9. That is, if the circumferential speed of the first take-up roller is faster than the circumferential speed of the tension-cutting roller, the filament yarn 2 supplied to the first take-up roller 7
The tension of the short fiber fleece 6 is equal to or higher than the tension of
When the filament yarn is subjected to the conjugation process from the fluid conjugation nozzle 1iPc between the composite spun yarns, the filament yarns become loops or slacks and are easily exposed to the outside of the composite spun yarn. As a result, when woven or knitted into a woven or knitted fabric, unevenness on the grain surface, unevenness due to dyeing differences, etc. occur, resulting in a poor quality appearance.

Therefore, depending on the filament supply tension, the first take-up p
- The circumferential speed of the shear 7 must be at least two inches slower than the circumferential speed of the shear 9.

Further, the position where the filament yarn 2 is supplied to the short fiber fleece 6 and pulled together may be anywhere between the tension cutting roller 9 and the first pulling roller 7. 1 of the average fiber length of fiber fleece 6
．． It is preferable to shorten it by 2 times υ. That is, in this region, there is almost no conjugation between the filament yarn and the short fiber fleece, so if this distance is made longer than 1.2 times the average fiber length of the short fiber fleece, the tension cutting roller 9 and the first puller are connected to the roller 7. This is because the number of floating fibers that are not gripped by any of the fibers increases and the fibers become more likely to break.

Here, the tow 1 may be made of polyester, polyamide, polyacrylonitrile, aromatic polyamide, or any other material as long as it is made of continuous long fibers (and the single yarn denier, cross-sectional shape, gloss, etc. may be selected as appropriate depending on the purpose). Good. Also, for the filament yarn 2, if it is a continuous yarn, the above-mentioned fiber combination can be used, and it is not limited to multifilament yarn, and spun yarns such as synthetic fibers and natural fibers can also be used. Yes, there is no particular limitation.Furthermore, the filament yarn 2 may be supplied in one piece (or in plural pieces).

Functions and Effects of the Invention The composite spun yarn thus obtained by the method of the present invention has little unevenness in thickness and is untwisted, yet has enough strength to withstand weaving and knitting, and can be used not only in spun looms but also in spun looms. It can also be used in various innovative looms such as filament looms and water gelato looms.

In addition, the composite spun yarn produced by the method of the present invention has a wide range of appearance and appearance depending on the processing conditions of the core, from high to low electric conductivity.
The texture etc. can be changed.

That is, as in Japanese Patent Application No. 57-189093, in the method of feeding filament yarn from a tension cutting roller, if the circumferential speed of the take-up roller 13 is made slower than the speed of the tension cutting roller and conjugation is imparted by fluid treatment, the filament yarn is There is a problem in that the tension decreases, and the filament yarn side of the obtained composite spun yarn becomes slack and comes out to the outside of the yarn, and the winding and entanglement with short fibers becomes weak. For this reason, it was difficult to obtain a composite spun yarn with high electrical properties.However, according to the method of the present invention, the circumferential speed of the first take-up roller 70 is lowered by the tension cutting roller 9.
(even if the filament yarn tension does not decrease, the circumferential speed of the first take-up p-sheet 7 can be varied over a wide range). Composite spun yarns of various disintegrability can be obtained.

In addition, the circumferential speed of the first take-up roller 70 is changed to the tension roller 90.
If the circumferential speed is set lower than the circumferential speed, the circumferential speed of the second take-up roller 130 can be made slower than the circumferential speed of the first take-up roller 70, so that the conjugation of the filament yarn with the short fJ1.M is further strengthened. The advantage is that you can.

Embodiment 1 FIG. 3 is a process diagram in which the first take-up roller 7 and the second take-up roller 13 are integrated to form a stepped roller 17 as shown in FIG. 4.

Using this process, a multifilament yarn made of polyethylene terephthalate fiber with a total denier of 130 denier and a single yarn denier of 0.45 denier was used for tow 1, and the tow was cut into three parts at a tension cutting part having a length of 75 on. A short fiber fleece 6 having an average fiber length of 325 mm and equivalent to 150 count (cotton count) was cut at a draft ratio of .7 times. On the other hand, a polyethylene terephthalate multifilament yarn having a total denier of 30 deniers and a single yarn denier of 1.25 deniers is used as the filament 2, and a tension of 9 g is applied by the tension adjusting device 3 to cut the short fiber fleece 6 with a tension cutting roller. 9
Align it through the alignment guide 4 at a position of about 200 degrees,
The first take-up p-sheet 7 and the separate roller 16 are wound for 4 turns, and then the second take-off p-sheet, which is 250B away from the tension cutting roller 9, is wound around the separate roller 16, and then the second take-off p, whose length is 3% shorter than the first take-up roller, is wound.
- The four turns were wound around the sheath 13 and the separate roller 16 using the winder 14. At this time, a fluid binding nozzle 11 having an interlacing effect is inserted at a position where the filament yarn 2 and short fiber fleece 6, which are drawn in parallel from the first take-up μm roller 7 to the second take-up roller 13, cross.
．． Conjugation treatment was carried out at 51ψ/s. At this time, the circumferential speed of the first take-up p-sea 7 is 3% of the circumferential speed of the tension cutting roller 90.
A slow φ item was used.

The core of the obtained composite spun yarn 12 is mainly occupied by filament yarn, and the sheath is occupied by short fiber fleece which has become bulky due to the occurrence of fine loops and slacks in the main and T-. The filament yarns and the short fiber fleece were closely intertwined with each other and were uniform with few uneven thicknesses and neps.

Next, using a water jet loom, a polyethylene terephthalate multifilament yarn having a triangular cross section with a total denier of 50 denier and a single yarn denier of 1.39 denier was used as the warp yarn, and a spliced spun yarn obtained by the method of the present invention was used as the Lm yarn. When the t'λ product was made, the texture and appearance were 7. A high-quality fabric very similar to C-type silk fabric was obtained.

In addition, the weaving properties of the short fiber fleece are long, and there is little fluff, so there is less fluff, and the filament yarns are aligned in the core, giving sufficient strength, so there is less yarn breakage. It was very good.

Comparative Example 1 A composite spun yarn was produced using the same equipment and conditions as in Example 1, except that the filament yarn 2 was fed from the upper part of the tension cutting roller 9 without being aligned.
)r NEP, the conjugation property was poor, and the filament yarn was exposed in a loop shape on the surface of the spun yarn, and only a composite spun yarn with a poor appearance was obtained.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing the conventional twistless spinning method, FIGS. 2 and 3 are process diagrams showing the method of the present invention, and FIG. 4 is a process diagram showing the method of the present invention.
It is a perspective view of the take-off roller used in the figure. Here, 1 is a fiber tow, 2 is a filament thread, 3 is a tension adjustment device, 4 is an alignment guide, 5 is a delivery roller, 6
1 is a short fiber fleece, 7 is a first take-up p-sea, 8 is a gutter-like guide, 9 is a tension cutting roller, 10 is a fluid take-up nozzle, 11
12 is a fluid binding nozzle, 12 is a composite spun yarn, 13 is a second take-up roller, 14 is a winder, 15 is cheese of the composite spun yarn, 16 is a separate roller, and 17 is a stepped roller. Patent Applicant Teijin Ltd. Agent Patent Attorney 1) Jun Hiroshi ■1 Figure Next 2 Days ■': 3 Figure 73- Zo + Country/7

Claims (2)

[Claims] (1) Tow or multifilament yarn consisting of continuous filaments is cut between a delivery roller and a pair of tension cutting # rollers that rotate at a peripheral speed faster than the peripheral speed of the delivery p-sheet to produce short fiber fleece. In the method for producing spun yarn, in which the short fiber fleece is passed through a fluid binding nozzle to impart binding properties between the fibers and form a yarn, the short fiber fleece carried out from the tension cutting roller is A method for producing a composite spun yarn, which comprises taking the yarn together with other yarns by a pair of first take-up rollers, and subsequently passing it through a fluid binding nozzle to impart binding properties between the yarns. (2) The method for producing a composite spun yarn according to claim (1), wherein the first take-up p-see circumferential speed is lower than the tension cutting p-see speed.