JPH0742619B2 - Method for manufacturing composite spun yarn - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a composite spun yarn which is obtained by stacking and twisting filament yarns and short fiber bundles and having excellent yarn quality. is there.

(Prior Art) Conventionally, many methods have been proposed for producing a composite spun yarn in which filament filaments and short fiber bundles are superposed. For example, Japanese Patent Publication No. 35-9815 discloses a composite spun yarn in which synthetic fibers are fed as continuous fibers to the fleece surface of a tape-shaped short fiber bundle at the front roller portion of a ring spinning machine and spun and twisted. Japanese Patent Publication No. 40-14256 discloses a method for producing a coated yarn comprising a polyurethane elastic filament yarn and a short fiber bundle. Japanese Examined Patent Publication No. 1-15611 proposes a method for producing a multi-layered composite yarn composed of filament yarn and short fiber bundles. However,
In these manufacturing methods, the filament yarn and the short fiber bundle are practically superposed during drafting of the short fiber bundle on the nap wire of the pair of front rollers, and then twisted. In doing so, it is necessary to deform the nap line of the front roller according to the thickness of filament yarn. In addition, since the nip wire of the front roller is deformed during the main drafting, an improper drafting is induced, which causes a problem that the yarn is wound around the roller or the yarn is broken. Further, when the continuous operation is performed, the front roller is deteriorated and the yarn quality is deteriorated. Further, the thickness of the filament yarn affects the deformation degree of the nip wire of the front roller. Therefore, the denier count, the long / short mixed ratio or the spinning rate is increased. It has a drawback that it is necessary to set restrictions on the turn number.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems, and is made by superposing and twisting filament yarns and short fiber bundles, and has excellent yarn quality, and there are restrictions on the spinning count and mixing ratio. An object of the present invention is to provide a method for producing a composite spun yarn that does not need to be provided.

(Means for Solving the Problem) The inventor of the present invention has reached the present invention as a result of extensive studies to solve the above problems. That is, the present invention is a method for producing a composite spun yarn by stacking and twisting filament yarns and short fiber bundles with a ring spinning machine, and the filament yarns are fronted to the short fiber bundles after drafting is completed. It is a gist of a method for producing a composite spun yarn, which comprises superposing and twisting on a nip line newly provided on the same front bottom roller along a rotation direction from a nip line of the roller.

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram for explaining a method for manufacturing a composite spun yarn according to the present invention.

In the figure, a roving 1 is supplied from a back roller 2 to a drafting area, passes through an apron 3, and then a back roller 2, an apron 3,
The drafting is completed at the time when the draft of the front roller formed by the tangent line of the front top roller 4 and the front bottom roller 5 is completed, and the draft short fiber bundle 1'is formed.

On the other hand, the filament yarn 7 is fed from the filament guide 8 through the yarn feeding guide 11 onto the nap wire 10 formed by the superposing roller 9 and the front bottom roller 5,
It is superposed on the short fiber bundle 1'which has been drafted on the same wire 10. Reference numeral 11 is a yarn feeding guide. By adjusting this guide, the filament yarn 7 and draft short fiber bundle 1 '
It is possible to freely select the relative positional relationship with.

Next, the filament yarn 7 and the drafted short fiber bundle 1 ′ that have been overlapped are passed through a snell guide 13 and then are actually twisted by a spindle 12 and a ring traveler 14 to be wound up into a tubular yarn.
Forming fifteen.

FIG. 2 is a view showing an example in which a nap wire 10 for superposing the filament yarn 7 and the drafted short fiber bundle 1 ′ is formed by an apron 16 and a front bottom roller 5.

In the present invention, the filament yarn 7 is a thermoplastic synthetic fiber such as polyester, polyamide, polyolefin or polyacrylonitrile, and various forms such as multifilament yarn, monofilament yarn or processed yarn can be used. When the filament yarn 7 is a multifilament yarn, it may be twisted or untwisted.

As a yarn feeding form, it may be directly fed, or may be fed after being electrically or mechanically opened.

FIG. 3 is a diagram showing an example of the positional relationship between the filament yarn 7 and the drafted short fiber bundle 1 ′ at the overlapping point on the nap line 10 formed by the overlapping roller 9 and the front bottom roller 5. , In the case of FIG. 3 (a) and (c),
A coated yarn can be obtained, and in the case of FIG. 3 (b), a heddle yarn can be obtained.

(Example) Next, the present invention will be specifically described based on Examples.

Example 1 A roving yarn 1 (through atscotland cotton combing) prepared by a normal cotton spinning process using the spinning method shown in FIG. 1 0.625s
Was fed to the backing roller 2 shown in FIG. 1 and drafting was carried out at a total drafting ratio of 35 to obtain a drafted short fiber bundle 1 '. On the other hand, a polyester multi-filament yarn 7 (300d / 96f) is applied with a filament tension of 25 g by the guide roller 8 and, after passing through the yarn feeding guide 11, by the method shown in FIG. It is supplied to the superimposing point on the nip wire 10 formed by the bottom roller 5 and the drafting short fiber bundle 1'and the filament yarn 7 are superposed, and then the spindle 12 and the ring traveler 14 are passed through the snell guide 13. Then, a true twist was added and wound up to obtain a composite spun yarn tube yarn 15.

The obtained composite spun yarn had a spinning count of Ne9.8s and a real twist number of 430.
The T / m (twist count was 3.5) and the polyester / Kotton weight ratio (%) was 55/45. Also, the single thread strength is 160
0 g, the deviation of yarn unevenness U% was 8.5% and there were few yarn unevenness, and the appearance was excellent.

Comparative Example 1 Using a conventional composite spinning method, 0.625 s of roving 1 (through cotton combed cotton) and polyester multifilament yarn 7 (300d / 96f) prepared by a normal cotton spinning process were composite-spun.

During spinning, the filament yarn pushes up the front top roller when the front roller is supplied, and the nap wire is deformed to cause nap failure, resulting in draft unevenness on the roving side. The obtained composite spun yarn had many defective yarn quality parts.

Next, the pressure of the front roller was set 5 kg higher than the conventional pressure to prevent the deformation of the nap wire, but the yarn path of the filament yarn on the front top roller was damaged by friction,
Moreover, this damage increased in proportion to the increase in the pressure applied to the front roller, and it was not possible to obtain a composite spun yarn with good yarn quality.

(Effect of the invention) The method for producing a composite spun yarn of the present invention is such that when the filament yarn and the short fiber bundle are superposed and twisted in the same drafting area by a ring spinning machine, drafting and superposition are separated. According to the method of the present invention, it is possible to stably produce a composite spun yarn with a small number of drafting spots and a good yarn quality, which cannot be obtained by the conventional method for producing a composite spun yarn. You can

Further, even if the continuous operation is performed, the damage of the top roller, which is caused by the supply of the filament yarn, which is observed by the conventional method, does not occur.

Further, according to the method of the present invention, filament denier filament yarn can be supplied as compared with the conventional method, so that the long-short mixing ratio or the spinnable fiber can be remarkably expanded.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a method for manufacturing a composite spun yarn according to the present invention, and FIG. 2 is a knurled wire for overlapping filament filaments and short fiber bundles with an apron and a front. FIGS. 3 (a), 3 (b) and 3 (c) showing an example formed by the bottom roller show filament yarns and short yarns at the superimposing point on the nap line formed by the superimposing roller and the front bottom roller. It is a figure which shows an example of the positional relationship with a fiber bundle. 1: roving, 1 ′: drafted short fiber bundle, 4: front top roller, 5:
Front bottom roller, 6: Nipple wire, 7: Filament yarn,
9: Stacking roller, 10: Nip wire, 12: Spindle, 15: Tubing thread

Claims (1)

[Claims] 1. A method for producing a composite spun yarn by stacking and twisting a filament yarn and a short fiber bundle by a ring spinning machine, wherein the filament yarn is front-rolled to the short fiber bundle after drafting is completed. A method for producing a composite spun yarn, which comprises superposing and twisting on a new nick wire newly provided on the same front bottom roller along the rotation direction from the nick wire.