JPS6375148A - Weaving method of shuttleless loom - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a weaving method using a shuttleless loom using synthetic fiber filament processed yarn as the weft.

(Prior Art) Woven fabrics using processed natural fibers or short fiber-like synthetic yarns are widely used. In order to give the synthetic fiber filament its spun-like properties,
For example, when multiple multifilaments with different elongations are pulled together and simultaneously false-twisted, some single yarns can be twisted depending on the difference in crimping between the core and sheath and the difference in yarn length. There are those that protrude from the yarn to take advantage of its special texture, those that use a fluid jet processing device to create snarls or loops, and those that use a thin object on the surface to rub the surface of the yarn. A number of proposals have been made for things in which so-called fluff is forcibly expressed. Unwinding a spool of thread is extremely difficult. Some of the single threads that stick out may become entangled with each other, making continuous unwinding impossible or even impossible. Extreme fluctuations in tension can significantly impair the quality of the fabric.In order to avoid these drawbacks, the fabric is generally wound and used as a cone or feel-wound tip, or the unwinding speed, i.e., the rotation of the loom, is increased. It was customary to weave extremely low numbers.

(Problems to be Solved by the Invention) On the other hand, in the case of composite multifilament processed yarns, yarns are alternately heated, fused yarns are used, or threads are wound with a large number of undissolved yarns. It is known that there is no problem in actually unraveling.

However, when yarns in an alternating or fused state are made into a fabric, they have the feel of linen and lack softness, making them inappropriate for the purpose of the present invention. Remaining unanswered questions 4. Nen yarn leaves a lot of irregularities, and its quality deteriorates as it is cut stiff and insect-like traces appear on the fabric.Furthermore, yarn that leaves entanglement due to interlacing has the same drawbacks.

The present invention addresses the above-mentioned problems and aims to provide a method for unwinding composite multifilament yarn at high speed to produce soft, high-quality fabrics with high efficiency.

(Another Means to Solve the Problems) The present invention provides a method for weaving a synthetic fiber filament processed yarn as a weft using a shuttleless loom, in which a highly twisted unraveled portion is used as the synthetic fiber filament processed yarn. This method is characterized in that the false-twisted yarn having the above structure is further passed through a tensioning device capable of applying a tension expressed by the following formula in front of the weft length measuring device.

To/Ti ≧ 2. OtTo ≧ 10 (J, 1
However, Ti: Tension before tension applying device [1] TO:
Post tension (J) The synthetic fiber filament processed yarn of the present invention is usually made by subjecting thermoplastic synthetic fiber filaments such as polyamide or polyester to a false twisting treatment, fluid treatment, etc., to create a two-layer yarn with a spun-like texture. It is made of structural bulky yarn,
A fluffy sheath has an untwisted part that is strongly twisted in one direction around a core part.

FIG. 1 is a schematic diagram showing such a synthetic filament processed yarn. The untwisted portions (4) usually have a variable length of 1 to 3 mm, and are preferably present at 20 to 40 pieces/m. , a release part where the sheath yarn simply covers the periphery of the core yarn (Q may be mixed in the processed yarn).

Such synthetic filament processed yarn is, for example, interlaced with two types of undrawn filament yarns with a ratio of elongation at break of about 1.5 to 4 of 501 stiffness/m or more! After complete twisting and false twisting under the conditions of untwisting tension/heating tension of 0.2 to 0.4, 50077! /ruin or more.

The shuttleless loom referred to in the present invention is one that uses a fluid such as air or water to make the weft threads fly, and the weft threads that are made to fly at one time are separated by length from the bobbin! It has a slot length device.

In the present invention, when weaving with such a shuttleless loom, the synthetic monofilament processed yarn is used as the 4th yarn, and
; Before measuring the length of the yarn, apply straining using a yarn guide or the like to eliminate entanglements in untwisted portions, etc. For ironing, a tensioning device that applies a predetermined tension is used, and the thread tension (Ti) before passing through the tensioning device and the thread tension (To) after passing through the device are T.

/Ti22.0 and 'ro≧1(l).If To is lower than the above range, the weft cannot be given sufficient straining, and the quality of the fabric deteriorates. The tension to be applied does not need to exceed the strength of the yarn, and usually To/Ti should be 5 or less and TO'fr: 80y or less.The tension applying device can be a yarn guide (Fig. 2A) or a knife ( B) in Figure 2) or a combination guide in which multiple knives (C in Figure 2) are arranged in a discrete manner to apply friction to the traveling yarn are used, making it possible to adjust the spacing between each yarn guide and knife. It is preferable to use a K I':1 knife edge that can change the frictional force applied to the threads.Also, it is preferable to use a K I':1 knife edge in order to forcibly create fluff on the threads and change the surface of the fabric.

FIG. 8 is a schematic view showing the weft yarn section before and after the tension applying device. the composite r unwound from the bobbin (1);
″,!!The processed filament yarn is tensioned by the tensioning device (2)
As shown in the figure, a dedicated roller (3) (preferably 35 in all stages) is used to feed and take off the yarn with a constant tension, and a weft length measuring device is used. (not shown) preferably has four grooves for pulling in the yarn without slipping.

(Real 1 strong row) Example 1゜Polyester multifilament semi-drawn yarn (breaking elongation 1
20%) 115D/86f and polyester multifilament undrawn yarn (breaking elongation 300%) 90D/24f
After aligning and interlacing (number of entanglements 80 pieces/m), the yarn was subjected to spit-stretching false twisting under the condition of decomposition couple/heating tension of 0.27 to obtain a two-layer borrowed composite yarn. Just in case. Next, using a quarter jet loom (Nissan LW41 modified), using the composite processed yarn as a weft, a tensioning device shown in FIG. 2A was used. After passing through the weft yarn feeding section shown in Fig. J8, the yarn was fed to a weft length measuring device, and polyester multifilament 75D/86f processed yarn was used as the warp yarn, and the number of revolutions was 60.
Mastered plain weave with Or and PoM.

Table 1 shows the results obtained by varying the tension before and after the tension applying device and the number of residual twists in this method.

Table 1 Fabric Judgment A: Good B: Slightly Good C: Poor (Fail) Example 2 Polyester multifilament semi-drawn yarn (breaking elongation 1
20%) 225D/48f and polyester multifilament undrawn yarn (breaking elongation SOO%) 140D/24
Interlace processing by aligning with f (number of interlacings: 60/m)
After that, a drawing and false twisting process was performed under the condition of untwisting tension/additional m9H force of 0.28 to obtain a two-dimensional composite processed yarn. Good value. next,
Using a quarter jet loom (Nissan LW41 modified),
The composite textured yarn was used as a weft to pass through the weft 5 line part of FIG. 3 using the knife tensioning device shown in FIG. Times: Number of papers 60 O
A plain woven fabric was obtained using r, P, and M. Table 2 shows the results obtained by varying the tension before and after the tension applying device and the number of residual twists in this method.

Table 2 Fabric Judgment A: Good B: Fairly Good C: Poor (Rejected) (Effects of the Invention) As described above, according to the method of the present invention, yarns with high convergence that have residual twist and entanglement can be produced. Since it is used for weft yarns, high-speed unwinding is possible, and high-efficiency ξ1 production can be carried out. Furthermore, the resulting woven fabric is of high quality and does not have wormhole-like edges because the wefts are ironed to eliminate residual twist and entanglement.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the synthetic 4JR thrust filament processed yarn used in the present invention, Fig. 2 is an explanatory diagram showing an example of the tension applying device used in the present invention, and Fig. 3 shows the weft yarn feeding section of the present invention. It is an explanatory diagram. (1)...Bobbin, (2)...
・Tension applying device, (3), (35...roller, (4)...unburnt part, 03)...
... Alternate twisting section, (O... Untwisting section 1, +- Fig. 1 Fig. 2 Fig. 3

Claims (3)

[Claims] (1) When weaving a synthetic fiber filament processed yarn on a shuttleless loom using a synthetic fiber filament processed yarn, a false twisted processed yarn having a strongly twisted untwisted portion is used as the synthetic fiber filament processed yarn, and the weft measurement 1. A weaving method for a shuttleless loom, which comprises passing a tension applying device capable of applying a tension expressed by the following formula in front of a length device. To/Ti≧2.0, To≧10 [g] However, Ti: Tension before tension applying device [g] To: Tension after tension [g] (2) The number of untwisted parts of the false twisted yarn is 20 to 40 pieces/m
The method according to claim 1. (3) The method according to claim 1, wherein the tension applying device is a combination of knife edges.