JPH06207346A - Method for high-speed weaving of multifilament - Google Patents

Abstract

PURPOSE:To provide a method enabling multifilament yarns <=1.0 denier in single fiber fineness to be subjected to jet loom weaving at a number of revolutions of >=600rpm leading to improving loom operating efficiency and suppressing decline in quality of the woven fabrics produced. CONSTITUTION:In picking of multifilament yarns <=1.0 denier in single fiber fineness, the yarns are put to one shot picking using a two-color jet loom, thus enabling the multifilament yarns to be woven at a number of revolutions of >=600rpm, leading to reduction in loom shutdown and improving the quality of the woven fabrics produced.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for weft-inserting multifilament wefts in a jet loom. More specifically, the present invention relates to a method for weft-inserting a weft yarn having a single yarn denier of 1.0 denier or less at high speed in a jet loom.

[0002]

2. Description of the Related Art Conventionally, a jet loom for filament is produced at a loom rotational speed of about 600 rpm, and the weft single yarn denier used here is a multifilament up to about 6.0 denier. A jet loom for color was commonly used. On the other hand, for the purpose of improving the texture of the woven fabric and the development of a new woven fabric, the development of multifilaments having a single yarn denier of 1.0 denier or less for weft has been advanced.

However, if such an ultra-fine multifilament is to be woven as it is in a conventional jet loom of about 600 rpm, filament breakage occurs during weft insertion, and the filament accumulates at various places between the loom creel and the weft storage drum. It turns out that there is a problem of coming up. In particular, filaments are greatly accumulated in the tensor portion, the guide portion, etc. where the weft is bent. Due to this, we have come to have many unsolved problems in weaving quality such as weaving filament weaving, weft breaking, weft knotting, weft loosening and wetting.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art as described above, and the loom stop and the fabric quality caused by the fine weft single yarn denier are caused. It is an object of the present invention to solve problems such as deterioration and to enable high-speed weaving of a jet loom having a loom rotation speed of 600 rpm or more.

[0005]

Means for Solving the Problems The inventors of the present invention have made extensive studies on such problems, and when a multifilament yarn having a single yarn denier of 1.0 denier or less is weft-inserted, The inventors have found that high-speed weaving at a loom rotation speed of 600 rpm or more is possible by weft insertion in a two-color jet loom, and have completed the present invention.

The two-color jet loom referred to in the present invention is
As shown in FIG. 1, it means a jet loom equipped with two weft insertion nozzles and a weft storage drum. In addition, the weft insertion using this loom means that one of the two weft insertion nozzles is alternately used for weft insertion. The jet loom for two colors is originally designed to insert wefts of different kinds, for example, weft insertion of S twist and Z twist into two wefts like weft twist woven fabric. It is a loom that has been used as such.

As the filament used for the weft in the present invention, polyester thread, polyamide thread, acrylic thread, recycled fiber cupra thread, rayon thread and the like can be used. Further, the single yarn denier of the filaments forming the weft needs to be 1.0 denier or less. Furthermore, in the present invention, in using the weft yarn,
When weft-inserting a weft composed of ultrafine single yarns as in the present invention, which requires weaving in one go using a color jet loom, a conventional one-color jet loom is used to rotate at 600 rpm or more. Even if you try to weave a number of filaments, filament breakage occurs frequently during weft insertion, and as a result, filaments are accumulated in various places between the weaving machine creel section and the weft storage drum. As described above, the accumulation of filaments is large, and many filament quality problems such as weft filament weaving, weft cutting, weft knotting, weft loosening, and wetting are caused. The present inventors were able to confirm such a fact. Therefore, conventionally, the loom rotational speed was inevitably reduced to, for example, 500 rpm or less.

It is presumed that it is difficult to optimally set the unwinding tension of the weft when the weft consisting of the ultrafine single yarn is inserted at high speed in this way, but it is presumed that it is difficult to set the optimum tension. There was no suggestion to solve such a problem. For the first time, the present invention enables high-speed weaving of ultrafine weft yarns. The present invention will be further described below with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

The weft insertion properties in the following examples and comparative examples were evaluated by the number of weft stops and the quality of the fabric weft. These evaluations were based on the following criteria. Evaluation based on the number of weft stops The average number of stops per day when operating for 3 days under each weft insertion condition was determined, and 1.0 times / day or less was evaluated as excellent weft insertion properties and displayed as follows. .

◎ 0.5 times / day or less, ○ 1.0 times / day or less △ less than 2.0 times / day, × 2.0 times / day or more Evaluation by woven fabric weft Weaving filament weave , Weft cut, weft
Sensory inspection for 5 items of deterioration of knots, looseness and wetting
And evaluated according to the following criteria. And W₀, W ₁The woven
It is said that weft quality is excellent.

W ₀ : No deterioration in quality W ₁ : Signs of deterioration in quality are observed but not reduced W ₂ : Quality is deteriorated W ₃ : Quality is noticeable

[0012]

Examples 1 to 4 and Comparative Examples 1 to 4 As an example, two-color air jet loom ZA-20 manufactured by Tsudakoma Industries Co., Ltd.
A 5150 cm wide type loom was used. Polyester 75d-36fSW sizing yarn was used for the warp, and polyester vicylon yarn 105d was used for the weft to evaluate the weft insertion property. The weaving condition is 60 loom rotation speed.
There are two levels of 0 and 800 rpm, and weft single yarn denier is 0.1, 0.15, 0.52 and 1.04d.
The level was evaluated.

Other weaving conditions were set as follows. Number of warp threads: 5110 Reed density: 72 / whale size Pull: 2 threads / width Warp thread width: 134.4 cm Weft density: 80 threads / inch In addition, the comparative example shows a conventional one-color air jet loom. Weaving was carried out under the same conditions as in the example except that it was used.

Weft insertion was carried out under the above weaving conditions, and the evaluation results are summarized in Table 1. Table 1 also summarizes the evaluation results of the comparative examples.

[0015]

[Table 1]

[0016]

INDUSTRIAL APPLICABILITY As described above, when weft-inserting a multifilament yarn having a single yarn denier of 1.0 denier or less, the multifilament yarn is weft-inserted in a two-color jet loom. By doing 600
It is possible to drastically reduce the wetting stop due to the speeding up of the jet loom above rpm. Therefore, the operability of the loom is remarkably improved, and at the same time, the excellent effect that the fabric quality is remarkably improved is obtained.

[Brief description of drawings]

FIG. 1 shows an arrangement of a yarn feeder, a storage drum, and a weft inserting nozzle of a two-color jet loom according to the present invention.

[Explanation of symbols]

 1 Weft supply body 2 Weft storage drum 3 Weft insertion nozzle for 2 colors

Claims (1)

[Claims] 1. A multifilament characterized in that, when wefting a multifilament yarn having a single yarn denier of 1.0 denier or less, the multifilament yarn is wefted over in a two-color jet loom. High speed weaving method.