JPS6119829A - Production of bulky slub yarn - 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 method for manufacturing bulky slub yarn using a plurality of multifilament yarns.

<Prior art> Conventionally, as a method for obtaining slub yarn using two multifilament yarns, as described in Japanese Patent Application Laid-Open No. 118920/1980, jetting is performed through two pairs of rollers each having a different speed. When feeding into the turbulent area, one filament yarn is held by the high-speed feed roller intermittently, thereby changing the amount of the filament fed to the turbulent area, and the other filament yarn is constantly held by the low-speed feed roller. death,
By supplying a certain amount to the turbulent region, dense loops or loops are formed at arbitrary intervals in the yarn length direction, a bulky area with a mixture of fluff, and a non-bulky area where two filament yarns are mixed and entangled with each other. is known to obtain. The bulky slub yarn thus obtained has a spindle-like slub shape, and a fabric with excellent appearance effects and a soft feel due to the structure of the slub portion is obtained.

However, although such a method yields a yarn having the above-mentioned characteristics, the non-bulky portion remains.

Since the filament yarn is supplied to the jet turbulence region by tension regulation, there are problems in that slight variations in tension can cause differences in morphology and change the degree of mixing. This becomes a more serious problem especially when filament yarns with different dyeability are used.

Furthermore, when transitioning from tension regulation to active feeding using rollers, the filament yarn instantaneously undergoes an extremely large speed change, and this instantaneous speed change cannot be absorbed in the jet turbulence region, resulting in abnormal shape or processing problems. It was also a cause of instability.

<Problems to be Solved by the Invention> The present invention solves the above-mentioned problems and provides a method for obtaining a bulky slab yarn without morphological variations in bulky parts, non-bulky parts, and mixed fiber level. There is a particular thing.

<Means for Solving the Problems> The present invention provides a method for obtaining a slub yarn by subjecting a plurality of multifilament yarns sent out at different speeds to jet turbulence treatment.
The filament yarn, which becomes the core yarn, is fed out from a roller that rotates at a constant speed.

A method for producing a bulky slub yarn characterized in that a filament yarn serving as a wound yarn is sent out from a roller that rotates at a constant speed to an increased speed intermittently at random time intervals, and is caused to pass through a jet turbulent region.

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

FIG. 1 is a schematic process diagram of an example of carrying out the present invention. The filament yarn (1) that will become the core yarn is sent out from a roller (3) that always rotates at a constant rate, and the filament yarn (2) that will become the winding yarn is sent out from a roller (4) that rotates intermittently from constant speed to increased speed. sent out from

The filament yarn fi+, (2+ is supplied to a nozzle (5) forming a jet turbulence area, and is fed to a delivery roller (6)
It is then rolled up by a winding roller (7). Roller (4)
To increase the speed of rotation, the pattern generated by the random signal device (10) (for example, the pattern shown in Fig. 2 (a)) is changed to the voltage level A by the control panel (9) as shown in Fig. 2 (b). or B, and is performed by a servo motor (8) whose rotational speed varies depending on the voltage level.

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

Example Polyester 50 d/48f was used as the filament yarn 1 in FIG. 1, and cationic dye diaplic polyester 75 d/48f was used as the filament yarn 2 to obtain a bulky slub yarn under the following conditions.

Conditions: Surface speed of feed roller 3: 100 m/min Surface speed of feed roller 4: 100 to 130 m,
/min rotating speed feed roller 4100 m/min Setting time at surface speed... Random time of 0.8 to 3 seconds Feed roller - 4130? Setting time at Fl/min surface speed...Random time of 0.1-0.4 seconds Air pressure of nozzle 5...3. Okg/lx” The obtained yarn has a bulky part of 17 to 70 crr due to the symmetrical loops.
The non-bulky parts were formed randomly between 1.5 and 5 m, and the workability was also extremely stable. Moreover, when this yarn was dyed, the level of mixed fibers in the non-bulky parts was the same regardless of the location.

<Effects of the Invention> The inside of the pirn, which was a problem in the past, was solved by sending the wound yarn into the jet turbulent area while always gripping it.

This not only eliminates the variation in the shape of the non-bulky part due to release tension fluctuations in the outer layer or above and below the burn, but also eliminates the difference in fiber mixing level, as well as the rise or fall when rotating at increased speed or returning to steady rotation. By having a shoulder, there is no abnormality in the shape of the bulky part, and the workability is extremely stable.

[Brief explanation of the drawing]

FIG. 1 is a schematic process diagram of an example of carrying out the present invention. FIGS. 2(A) and 2(B) are model diagrams of signal patterns generated by a random signal generator and voltage levels converted by a control panel, respectively. 1... Filament yarn serving as core yarn, 2... Filament yarn serving as winding yarn, 3... Roller rotating at a constant speed, 4... Roller rotating at increased speed, 5... Jet turbulence Flow nozzle, 6... Delivery roller, 7... Winding up roller, 8... Servo motor, 9... Control board,
1o...Random signal device I 圀+2 zo

Claims (1)

[Claims] In order to obtain slub yarn by jet turbulence treatment of multiple multifilament yarns sent out at different speeds, the filament yarn that will become the core yarn is sent out from a roller rotating at a constant speed, and the filament yarn that will become the wrapped yarn is A method for manufacturing a bulky slub yarn, characterized in that it is fed out from a roller that rotates at a constant speed to an increased speed intermittently at random time intervals, and is passed through a jet turbulence region.