JPH02169746A - Weaving of thick-and-thin yarn by air-jet loom - Google Patents

Abstract

PURPOSE:To obtain a thick-and-thin woven fabric free from defects and flaws at a high speed by using a thick-and-thin yarn of a polyester multifilament as a warp and flying a weft with a main nozzle, an auxiliary nozzle and a modified reed having a yarn guide hole. CONSTITUTION:A thick-and-thin yarn of a polyester multifilament having a fineness of <=150d is used as a warp 4. A weft is inserted by air jet using a main nozzle, an auxiliary nozzle 3 and a modified reed 1 having a yarn guide hole 2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention uses thick and thin yarns made of polyester multifilament as warp threads, and uses an air jet method that enables stable high-speed weaving and provides high-quality fabrics. This invention relates to a weaving method using a loom.

[Conventional technology]

A frame loom or a water jet loom is generally used as a weaving means for thick-and-thin yarn whose warp is a differentiated special yarn. Thick and thin yarns made of polyester multifilament used in textiles are becoming finer in denier as high-value-added products due to recent consumer demands for luxury. However, the strength of thick and thin yarn made of polyester multifilament is lower than that of regular polyester multifilament, and its elastic recovery rate is also lower, so it is necessary to pay close attention during preparation and weaving. Thick and thin yarn cannot be woven in a water jet loom with high tension during weaving. As a result, it is currently produced using frame looms with low productivity. Note that air jet looms are more expensive (air costs) than water jet looms, so they have not been conventionally used for weaving synthetic fiber multifilament for boat fishing.

[Problem to be solved by the invention]

As a characteristic of thick-and-thin yarn, each filament has arbitrary portions in its length direction that have different physical properties, specifically, different drawing ratios. Therefore, compared to normal multifilament systems, it is unstable to physical processing and is not ready to be subjected to tension.
Depending on how it is handled during the weaving process, the characteristics of thick and thin yarn may not be utilized. However, as the physical property differences in the length direction of each filament become more arbitrary, especially as the denier becomes thinner, the woven fabric becomes more susceptible to differences in shading during dyeing.
It is also possible to express the differences in length of each filament yarn in the fabric, and obtain an appearance and texture that exceeds that of silk fabric.

However, when thick-and-thin yarn becomes fine in denier, its strength and elastic recovery rate are low, making preparation and handling during the weaving process even more important.

- When weaving thick-and-thin yarn made of polyester multifilament into the membrane using a framed loom, productivity is naturally low because the number of rotations is limited due to the characteristics of the loom. In addition, since a solid object called a shuttle is used to insert the weft threads, the opening of the warp threads becomes large, resulting in large tension distortions, and the warp threads are cut by the shuttle and the warp and weft threads are not organized accurately. It has the disadvantage that defects are likely to occur.

On the other hand, when a water jet loom is used, productivity is excellent because jetted water is used to insert the weft threads, and water, which is a fluid, is used to insert the weft threads, so the resulting fabric is free from flaws and other defects. The quality of the fabric is excellent. However, when inserting the weft using a water jet loom, the tip of the weft is mainly covered with jet water as it flies.
In order to protect the weft flight due to the free fall of the jet water, it is necessary to increase the warp opening amount. As a result, the tension distortion of the warp becomes large, and if thick and thin yarn made of fine denier polyester multifilament, which is difficult to follow the tension distortion, is used for the warp, stable weaving at high speed is not possible, so water jet Currently, weaving is carried out using frame looms, which have low productivity and cannot be used for looms.

The purpose of the present invention is to solve these problems, and to produce a polyester multifilament that can stably perform high-speed weaving, has excellent productivity, has good quality of the fabric, and is free from flaws and other defects. An object of the present invention is to provide a method for weaving a thick and thin fabric.

[Means to solve the problem]

The gist of the present invention is a weaving method using an air jet loom in which thick and thin yarns made of polyester multifilament of 150 d or less are used as warp yarns, and the weft yarns are flown through a deformable layer having yarn guide holes, a main nozzle, and an auxiliary nozzle. It is something.

Hereinafter, the configuration of the present invention will be explained in detail.

First, in the present invention, thick-and-thin yarns made of polyester multifilament include, for example, ordinary round cross-section yarns, as well as irregular cross-section yarns, hollow yarns, and the like. In addition, the fibers may be either air-entangled or not air-entangled during production. In addition, thick and thin yarns made of the above-mentioned polyester multifilament may be processed by taslan processing (spray processing) or mixed fibers, and each may be used alone or in combination.

The air jet loom used in the present invention includes a deformable layer 1 having a thread guide hole 2 shown in the first section, and an arbitrary part in front of the lower part of the thread guide hole 2 of the deformable layer 1 as shown in FIGS. 1 and 2. A plurality of auxiliary nozzles 3 are arranged at a distance in the longitudinal direction. The weft insertion method for the air jet loom configured as above is as follows:
As shown in Figures 1 and 2, the warp 4 with the weft opened
The weft yarn begins to fly through the yarn guide hole 2 of the deformable layer 1 by the air jetted from the main nozzle 5 during the gap, and the weft yarn is guided into the yarn guide hole 2 by a plurality of auxiliary nozzles 3 adjacent to the main nozzle 5. The jetted air passes the receiver one after another, flies in the width direction of the fabric, and inserts the weft. Therefore, the opening amount of the warp threads 4 only needs to be opened to the extent that the thread guiding holes 2 of the deformable layer 1 and the auxiliary nozzle 3 function, and it is possible to make the opening amount smaller than that of a water jet loom or a frame loom. For example, when comparing the opening amount of warp yarns near the reed, a conventional water jet loom requires 40 to 45 non, but in the present invention, it is possible to increase the opening amount to 30 to 35 mm, and further to 25 mm.

That is, by placing the auxiliary nozzle 3 shown in FIG. 1 as close as possible to the upper part of the lower surface of the thread guide hole 2, the opening amount of the warp threads 4 can be minimized. However, the position of the auxiliary nozzle 3 must be below the position where the weft yarn in the center of the deforming liquid 1 is driven. Therefore, there is naturally a limit to reducing the opening amount of the warp threads 4. If the warp denier exceeds 150d, the difference in yarn thickness and filament yarn length peculiar to thick and thin yarns,
Specifically, the presence of loose filaments makes opening difficult and results in poor weft insertion properties.

When the thick and thin yarn of the warp 4 is less than 30 denier, the warp 4 has a high density, and the main nozzle 5 and the auxiliary nozzle 3
The air injected from the reed for transporting the weft becomes difficult to flow outside through the thread guide hole of the reed, and most of the air is consumed to discharge the air already in the thread guide hole 2 to the outside from the thread guide hole. Flight performance deteriorates.

By the way, an example of the relationship between the change in the opening amount of the warp threads 4 and the change in warp tension strain will be explained with reference to FIG.

FIG. 3 is a side view of the warp shedding, where 6 shows the front of the weave and 7 shows the back roller of the loom. L indicates the distance from the front of the fabric to the back roller salt, and β indicates the distance from the front of the fabric to the maximum opening point. L=
When comparing the opening amount at the maximum opening point of 100mm and 80m+m when R = 100mra and 1,000mm, the warp length at the maximum opening is 1,013.2mm respectively.
, 1.008.6 mm, and the warp length difference ratio at the time of sowing is 0.45%.

'Generally, the average warp tension in weaving is 0.2~0.4gZ
However, according to the present invention, since the opening amount can be minimized, it is possible to weave with a low average warp tension of about 0.2 g/d. FIG. 4 shows an example of the strength and elongation curve of thick and thin yarn, and it can be seen that the change in elongation is extremely large with respect to the change in strength near the average weaving tension, compared to ordinary synthetic fiber multifilament. Therefore, 0.4
A 5% difference in warp length greatly affects the warp tension strain difference, and it is important to minimize warp tension strain when using thick-and-thin yarns.

Therefore, by reducing the opening amount of the warp threads, the tension distortion of the warp threads of the thick and thin thread used is reduced. This is an effective means to enable stable weaving at high speed when thick-and-thin yarns made of polyester multifilaments of 150 d or less, which have low strength and poor elastic recovery, are used as warp yarns.

If thick-and-thin yarn made of polyester multifilament exceeding 150 denier is used for the warp, as described above, it is not good because it is difficult to open the yarn. That is, when weaving using thick-and-thin yarn made of polyester multifilament of 150 deniers or less for the warp, the present invention reduces the warp tension strain difference by making the warp opening smaller than usual, thereby stably weaving. This makes high-speed weaving possible.

Thick-and-thin yarns made of polyester multifilaments of 150 d or less used as warp yarns are preferably used in the range of 0.1≦single yarn denier of warp≦10 from the viewpoint of ease of shedding.

Furthermore, due to the difficulty of shedding, the number of filaments in the warp is 1.
It is preferable that the number is 0 or more.

Further, it is desirable to use synthetic fiber multifilament with a warp twist number of 0 to 300 T/m.

The textile structure according to the present invention includes satin, twill, plain weave, etc., but it can be said that it is particularly suitable for plain weave.

The present invention will be specifically explained below using examples.

〔Example〕

Example 1 Thick and thin yarn made of triangular cross-section yarn of polyester 40 d / 12 f was used for the warp, and round cross-section yarn of polyester 75 d / 72 f was used for the weft and 2.700 T.
/ m SZ twisted yarn was twisted and set in a vacuum setter at 85°C for 40 minutes, and an air jet loom was used in conjunction with a deforming liquid, a main nozzle, and an auxiliary nozzle that had a thread guide hole with the shape and dimensions shown in Figure 5. In Palace 1 [Example 1 and
Table 1 shows the conditions and results of Comparative Example 1, in which the same fabric was similarly woven in a water jet loom.

Example 1 according to the present invention had a high loom operating rate, and the obtained fabric was a product with excellent quality and texture.

Example 2 Thick and thin yarn consisting of polyester 75 d/24 f hollow cross-section yarn twisted at 250 T/m was used for the warp, and polyester 75 d/3 was used for the weft.
6 f round cross section yarn 2,500T/m S, Z twisted yarn 75
Example of weaving deshine in an air jet loom using a deforming liquid, a main nozzle, and an auxiliary nozzle having a thread guide hole having the shape and dimensions shown in Fig. 5, using yarn that had been twisted and set in a vacuum setter at ℃ for 40 minutes. Table 1 shows the conditions and results of Comparative Example 20, in which the same material was woven using a frame loom.

Example 2 according to the present invention has a productivity that is more than three times higher than the productivity of frame loom weaving in Comparative Example 2, and the loom operating rate is also high, and the obtained fabric has no flaws and has excellent quality, and has a good texture. It turned out to be an excellent product.

〔Effect of the invention〕

By using the weaving method according to the present invention, it is possible to obtain a fabric with high productivity, high weaving efficiency, and excellent quality without any flaws and excellent texture.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the weft insertion part of the air jet loom, which includes a modified reed with a thread guide hole, a main nozzle, and an auxiliary nozzle, where 1 is the modified reed, 2 is the thread guide hole, 3 is the auxiliary nozzle, and the nozzle 4 is the Indicates the warp. FIG. 2 shows a part of a plan view of the weft insertion section as seen from the top of the loom, where 1 is a modified reed, 2 is a thread guiding hole, 3 is an auxiliary nozzle, and 5 is a main nozzle. FIG. 3 is a schematic diagram showing a side view when the warp threads are opened. 4
indicates the warp, 6 indicates the loom, and 7 indicates the back roller of the loom. L
is the quantum and 1 indicates the distance from Orimae to the maximum aperture point. FIG. 4 is a graph schematically showing the strength and elongation curves of thick and thin yarn and polyester multifilament. FIG. 5 is a plan view showing in detail the shape and dimensions of the modified reed used in the present invention, where 1a indicates the modified reed, and 2a indicates the thread guiding hole.

Claims (1)

[Claims] A weaving method using an air jet loom in which thick and thin yarns made of polyester multifilament of 150 d or less are used as warp yarns, and the weft yarns are made to fly through a modified reed with yarn guide holes, a main nozzle, and an auxiliary nozzle.