JPS59130331A - Spun yarn for weft yarn of water jet loom - 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] The present invention is a water jet loom (hereinafter referred to as W, J, L).

That's what it means. ) is concerned with open-end spun yarns used for weft yarns.

In recent years, the rationalization of the weaving process has been rapidly progressing, and one of the rationalization measures is the use of filament looms.
The transition to L is progressing. However, W, J, L,
Although the loom is superior in terms of speeding up and labor saving, on the other hand, it has the disadvantage of being less versatile than conventional shut μ looms, such as the warp and weft used being limited to filament yarns. Expansion is the future development challenge for W, T, and L.

Therefore, as part of this expansion of versatility, there has been a strong demand in the industry to weave mixed-woven fabrics using spun yarn for the weft, and recently there have already been some efforts to weave mixed-woven fabrics using spun yarn for the weft. Weaving by W, J, and L has started. However, unlike filament yarn, spun yarn has a lot of fluff, and has many yarn defects such as knots, and also has a lot of fluff generated during weaving, so it is called 1 fluff, fluff, etc.

) are W, J, L.

It may accumulate in the nozzle needle for jetting, causing so-called nozzle clogging and making weft jetting impossible.

Furthermore, if cotton is used, cotton scraps and leaf scraps are used.

Contaminants such as neps (hereinafter referred to as contaminants) can double the nozzle clogging, making stable weaving difficult. Therefore, the current state of weaving is to limit the types of yarn to yarns with relatively little fuzz, such as twin yarns, and to use manpower tactics such as reducing the number of looms.

In view of the above points, the present invention aims to provide a spun yarn for wefts of W, T, and L, which enables stable weaving without clogging the nozzle even when cotton is used. It is something.

That is, the present invention is a water jet yarn that is a blended yarn of hydrophobic synthetic fiber and cotton that is open-end spun through a combing process, and that has a twist coefficient K of 4.7≦5.2. This is a spun yarn for the weft of loom.

For the twist coefficient, the yarn count is N (Ei-2 count).

It is defined as K=T/VF, where T is the number of twists withstand.

Below are W, J, and L according to the present invention. The spun yarn for weft (hereinafter referred to as the spun yarn according to the present invention) will be explained in detail.

When using spun yarn as the weft for W, J, and L, the biggest problem with fC is that, as mentioned above, spun yarn has more fuzz than filament yarn, and especially when cotton is used, there is even more contamination. When foreign matter is added to the nozzle, this fluff, etc., and foreign matter can clog the nozzle, causing a series of stoppages.

The spun yarn according to the present invention is a blended yarn of hydrophobic synthetic fibers exclusively used for polyethyl fibers, polyamide fibers, and polypropylene fibers, and cotton, and prevents nozzle clogging by minimizing the amount of fluff and other impurities. It was e-filtered to eliminate it. For this reason, spinning of the spun yarn according to the present invention is carried out not by a ring spinning machine but by an open-end spinning machine.

this is.

When an open-end spinning machine is used, there is no need for the thread to be rubbed by a trapeller or the like during twisting, as is the case with spun yarns spun by a ring spinning machine.

This is because the occurrence of fuzz is extremely low. Next, the fibers must be passed through a second combing step to remove very short fibers and impurities that may cause clogging. Furthermore, in order to reduce fuzz and improve binding power during spinning using an open-end spinning machine, approximately 15% more twist is applied per actual twist than during spinning of the open-end spun yarn. number of twists,
In other words, it is possible to twist the number of twists such that the twist coefficient K is 4.7≦≦5.2, and when performing this strong twisting, it is also possible to twist one fluff at the same time. This can be achieved by using an open-end spinning machine with a centerpiece that has such functions. By experimentally appropriately determining the twist coefficient within the range of 4.7≦ to ≦5.2 depending on the yarn type, it is possible to reduce the fuzz index of the spun yarn and increase the binding force. can. What is shown in FIG. 1 is a schematic cross-sectional view of a part of the rotor of an open-end spinning frame equipped with a center piece having the above-mentioned functions. The seven turbines 7+2) of the p-turret (1) of this open-end spinning machine are formed into a truncated cone shape that tapers toward the bottom surface (1a) of the rotor, and the centerpiece top surface (2a) Ic is the thread guiding hole. (3) is open. The spread fibers (Fa) colliding with the back surface of the separator (4) in the rotor (1) are once accumulated in the fiber accumulation groove (1b) by the centrifugal force caused by the rotation of the rotor (1), and then the fiber accumulation grooves (1b) are While being sequentially stripped from the groove (1b), the yarn passes through the guide hole (3) without being heated by the rotation of the gator (1).

It is spun as a spun yarn (F'b). The center piece (2) of the rotor +11 is formed into a truncated cone shape.

4- And since the yarn guide hole (3) forms an acute-angled opening edge (3a) on the top surface (2a) of the centerpiece, the spun yarn C1''b bends at the edge (3a). ) with an appropriate tension, it is possible to apply approximately 15% more twist than conventional open-end spun yarn without causing yarn breakage, and furthermore, by pulling out the sharp open end edge (6a
), the wrapped fibers peculiar to the open-end spun yarn protruding from the main body of the spun yarn (F″b) are twisted into a spiral shape to produce a fluffing effect and a tightening effect on the yarn.9 Reduces fluff index.

Conjugation power can be increased. And in this case the spun yarn (
The twist coefficient K of li'b) may be adjusted to an appropriate value depending on the yarn type within the range of 4.7≦ to ≦5.2. Twist coefficient K is 4
．． 7>K sharpening cannot reduce the fuzz index in most yarn types, nor can it improve the binding power. Further, when 5.2<K, the texture of the woven fabric becomes hard and the appearance deteriorates.

The spun yarn according to the present invention has one or more structures, so if it is used as a weft when weaving with W, J, T, etc., it will have 9 fuzz as in the case of using conventional spun yarn. There is no possibility that the nozzle will be clogged due to foreign matters such as dirt, etc., resulting in frequent stoppages and making it impossible to weave. In addition, the woven fabric has an appearance similar to that of double yarn without weft irregularities, and a soft texture that cannot be obtained with double yarn.

Below are examples in which two spun yarns according to the present invention are used as weft yarns in W, J, and L weaving.

Example 8 Fabrics of the following specifications were woven using the spun yarn of the present invention and the ring spun yarn as a comparative example and the conventional open-end spun yarn as wefts using W, J, L, and ILW-41-145 produced in Example 8. . Table 1 shows the characteristic values and weavability of each weft.

Textile specifications: Warp threads: Nylon 70D/16F' Grain density: 108 x 66 threads/inch Weaving conditions: Number of rotations:
- 380R/M weavability evaluation; (Note) (1) Fuzz index is measured in accordance with the optical measurement method specified in JIS L 1008, and represents the number of fuzz of 3M or more that exists in a yarn length of 100 m.

(lI) The conjugation force is described in Patent No. 601116 (Special Publication No. 45
-26588) It was measured using a warp binding force tester (manufactured by Hiruta Riken Co., Ltd.) in accordance with the standard test method specified for the tester, and expressed in 9 times.

(1111 The amount of fluff produced is the amount of fluff produced by
Weight of fluff deposited in the filter box (represented by @).

(The 1φ stopping rate represents the number of stopping machines per 10' weft pick.

As shown in the table above, the ring spun yarn of grave 1, the conventional open-end spun yarn of flat 2, and the spun yarn of the present invention of 45,
Both of the same material and the same first hand are combed yarns, but &1
While the ring spun yarn of and the conventional open-end spun yarn of /I62 have a twist coefficient smaller than 4.7,
The twist coefficient of the spun yarn according to No. 41 of the present invention is 4.7 or more and 5.2
Since the value is within the following range and is suitable for the yarn type, as shown in the table, the fluff index and binding strength are the same as for /I61 ring spun yarn and 42 conventional open-end spun yarn. It has a fluff index and a binding strength of 6, which is why the amount of fluff deposited is extremely small compared to /I61 and M2 combed yarn, and the stoppage rate is also much lower. I understand. In addition, compared to the same material and similar single yarn equivalent count, the 9 fuzz index is superior, and although the amount of wind floss is almost the same, the stoppage rate is much lower.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a rogue part of an open-end spinning machine that spins the spun yarn according to the present invention. +1)-...rotor, (2)...centerpiece,
+31-・Thread guide hole. (4)...Separator patent applicant Unitika Co., Ltd.

Claims (1)

[Claims] (1) A blended yarn of hydrophobic synthetic fiber and cotton that is open-end spun through a combing process. A water jet μm weft spun yarn characterized in that the twist coefficient K is 4.7≦≦5.2.