JPH07138883A - Filament yarn for weaving in air jet loom and method for weaving in air jet loom - Google Patents

Abstract

PURPOSE:To obtain filament yarn capable of weaving even nonbulky yarn having a low air resistance in flying in an air jet loom and reducing pressurized air consumption and provide a method for weaving in the air jet loom. CONSTITUTION:This filament yarn is obtained by applying fine particles for increasing the air resistance in flying to weft yarn in weaving nonbulky filament yarn as the weft yarn in an air jet loom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filament yarn for a weft and a method for weaving an air jet loom, which has a very high weaving efficiency and a reduced compressed air consumption when weaving in an air jet loom.

[0002]

2. Description of the Related Art In recent years, water jet loom and air jet loom loom have been widely used for the purpose of speeding up weaving and improving weaving efficiency.

Among these looms, the air jet loom is one in which wefts are conveyed by a jet stream (hereinafter referred to as flying), but when flat yarns or strongly twisted yarns are used as the wefts, the wefts are sufficient. However, the loom did not fly, the loom frequently stopped, and the compressed air consumption significantly increased.

Among these drawbacks, the compressed air consumption is described in JP-A-1-45848 or JP-A2-1.
Japanese Patent No. 54033 discloses that the main body of the loom or its auxiliary equipment is modified to reduce the compressed air consumption.

However, the amount of compressed air that can be reduced by the above method is small, and a means for sufficiently flying flat yarns or strongly twisted yarns to improve weaving efficiency has not yet been developed, and a large amount of jet airflow is generated. The reality is that weaving is unavoidable while consuming.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art, and even a non-bulky yarn having a small air resistance during flight can be easily woven and compressed. It is an object of the present invention to provide a filament yarn and a method for weaving an air jet loom that can reduce the amount of consumption.

[0007]

Means for Solving the Problems As a result of intensive studies made by the present inventors in order to achieve the above object, the ease of flight of a weft yarn used for air jet loom weaving is determined by the bulkiness of the weft yarn. It has been found that there is a close relationship with the air resistance of the weft thread, and when fine particles are attached to the weft thread to increase the air resistance during flight, the weft thread will fly sufficiently even with a small amount of air pressure and weaving efficiency will be improved. It was clarified that it could be improved.

Thus, according to the present invention, a filament yarn for a weft yarn used for air jet loom weaving, comprising:
There is provided an air jet loom weaving filament yarn, wherein fine particles for increasing air resistance during flight are attached to the filament yarn.

Further, according to the present invention, when weaving a non-bulky filament yarn as a weft yarn of an air jet loom, it is possible to attach fine particles to the weft yarn to increase air resistance during flight. A featured air jet loom weaving method is provided.

The filament yarn referred to in the present invention is a multifilament or monofilament composed of synthetic fibers, semi-synthetic fibers and recycled fibers, and has a flat shape without crimps, fluffs or loops, or crimps or Even if it has fluffs, loops, etc., the effect is remarkably exhibited in the case of a non-bulky yarn, such as a yarn having a strong twist and having a flat shape.

Further, in the present invention, it is important that fine particles for increasing air resistance during flight are attached to the filament yarn.

Here, the fine particles may be any particles which, when attached to the filament yarn, partially increase the apparent cross-sectional area of the filament to increase the air resistance. Examples thereof include various inorganic fine particles, plate-like materials such as mica, fibrous materials such as natural pulp and synthetic pulp, and film-like materials. Two or more kinds of these fine particles may be used in combination.

Among them, preferable fine particles are natural pulp and synthetic pulp, and meta-aramid pulp such as polymetaphenylene isophthalamide is particularly preferable.

The term "attached" means that at least while the filament yarn is flying in the jet stream.
The state in which the fine particles and the filament yarn are fixed to the filament surface by the physical interfacial adhesive force, the chemical adhesive force by a sizing agent, or both, to the extent that the fine particles and the filament yarn behave integrally.

As a method for attaching the above-mentioned natural pulp or synthetic pulp to the filament yarn, the pulp is dispersed in water or a solvent to form a slurry, and a sizing agent or the like is added if necessary, and then the slurry is made into the filament yarn. The method of impregnating with water and drying water or a solvent is preferable.

FIG. 1 shows an example of a method of impregnating a filament yarn with a slurry. The twisted filament yarn 1 is dropped with the slurry 4 while running, and is passed through the wire mesh rolls 2 and 2 '. After being wound on the cylinder 3, it is dried.

As the method of impregnating the filament with the slurry or emulsion, as shown in FIG. 1, in addition to the method of directly dropping it on the running filament yarn, the dipping method or roller coating method of running the filament yarn in the impregnation bath is carried out. Any known method such as the above can be arbitrarily adopted.

The amount of pulp adhered may be appropriately set according to the type of pulp used, the fineness of the filament yarn or the weaving conditions of the air jet loom, but if it is too small, the filament yarn will fly sufficiently. On the other hand, on the other hand, if the amount is too large, the handleability at the time of weaving deteriorates.
It is preferable to keep it in the range of 0% by weight.

The deposited amount of pulp can be adjusted by changing the concentration of pulp slurry, the processing speed, and the pickup amount.

Furthermore, it is preferable that the particle size of the above-mentioned natural pulp and synthetic pulp is set so that the standard freeness of Canadian measured in a slurry state is 30 to 650 ml.

If the Canadian standard freeness is less than 30 ml, the grain size of the pulp is too small to improve the air resistance, the weaving property is deteriorated, and the compressed air consumption is not effectively reduced.

On the other hand, the standard drainage of Canadian is 650 m.
When it is larger than 1, the particle size of the pulp is too large and the pulp is liable to fall off during flight, and the effect of the present invention cannot be sufficiently exhibited.

[0023]

In the present invention, the filament yarn has fine particles attached to the surface thereof, and the apparent cross-sectional area partially increases to increase the air resistance during flight. Is easily done.

Therefore, even a non-bulky yarn such as a flat yarn or a strongly twisted yarn, which normally cannot fly without a large amount of jet airflow, can be easily woven and the weaving efficiency is greatly improved.

Moreover, in this case, if meta-aramid pulp is used as the fine particles, the pulp is in the form of a film, the interfacial adhesion with the fiber is good, and the pulp has an appropriate rigidity. Therefore, the filament yarn can be stably flown with a small amount of compressed air, and the weaving efficiency is improved.

[0026]

EXAMPLES The present invention will be described in more detail below with reference to examples. In addition, the Canadian standard freeness, the amount of compressed air consumption, and the number of times the loom was stopped in the examples were measured by the following methods.

(1) Canadian Standard Freeness Measured according to JIS P 8121.

(2) Compressed air consumption CKD's flow sensor for compressed air (Flurex P
F4000-15) was used to measure the air pressure consumption per unit time.

(3) Number of loom stoppages 100 The number of stoppages during weaving was measured, and the average number of stoppages per 24 hours was calculated.

[Examples 1 and 2] S3000 T / m was added to polyethylene terephthalate multifilament having 75 denier / 36 filaments obtained by spin-drawing by a conventional method.
Was twisted to obtain a weft yarn for weaving an air jet loom.

Fine particles to be attached to the weft were obtained by the following method.

First, polymetaphenylene isophthalamide having an intrinsic viscosity of 1.35 measured by dissolving it in N-methyl-2-pyrrolidone was produced.

Next, the polymer was dissolved in N-methyl-2-pyrrolidone to a concentration of 12.5% by weight, and water was added to form an aqueous solution having a concentration of 3% by weight, followed by pulping by a known method. did.

The obtained pulp was slurried with a pulper, a high speed disintegrator and a disc refiner to obtain a slurry concentration of 0.
By adjusting the disc clearance of the disc refiner at 3%, a pulp slurry having Canadian standard freeness shown in Table 1 was obtained.

Then, using the device shown in FIG.
The above-mentioned pulp slurry in which a polyvinyl alcohol-based sizing agent was dispersed was dropped, and then it was wound into a cylinder and dried together with the cylinder at 80 ° C. for 30 minutes to adhere the pulp to the weft.

The weft and 60 denier / 3 prepared separately
Using 6-filament polyethylene terephthalate multifilament as a warp, an air jet loom ZA-110i manufactured by Tsudakoma Kogyo was used to obtain a warp density of 17
A plain weave having a weft density of 4 yarns / inch and a weft density of 73 yarns / inch was woven. The rotation speed at this time was 600 rpm.

Table 1 shows the number of loom stops and the amount of compressed air consumption during weaving.

Comparative Example 1 The procedure of Example 1 was repeated except that the pulp was not adhered. Table 1 shows the number of loom stops and the amount of compressed air consumption during weaving.

[0039]

[Table 1]

As shown in Table 1, when the filament yarn of the present invention is used as the weft yarn, the number of times the loom is stopped is significantly reduced even with a strongly twisted yarn having low air resistance, and the weaving is performed with an extremely small amount of compressed air consumption. be able to.

On the other hand, in Comparative Example 1, since the weft yarn to which pulp was not attached was used, the compressed air consumption was large and the loom was stopped many times.

[0042]

According to the present invention, even when a monofilament or a strongly twisted yarn having a small air resistance is used as the weft, the weft can sufficiently fly, the weaving can be performed, and the compressed air consumption can be greatly reduced. It will be possible.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a method of attaching pulp to weft yarns.

[Explanation of symbols]

 1 Filament yarn after twisted yarn 2 Wire mesh roll 2'Wire mesh roll 3 Winding cylinder 4 Pulp slurry

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location D03D 47/30 7152-3B D06M 23/08

Claims (6)

[Claims] 1. A filament yarn for a weft yarn, which is used for air jet loom weaving, wherein fine particles for increasing air resistance during flight are attached to the filament yarn. Filament yarn for jet loom weaving. 2. The filament yarn for air jet loom weaving according to claim 1, wherein the fine particles are natural pulp and / or synthetic pulp having a Canadian standard freeness of 30 to 650 ml measured in a slurry state. 3. The air jet loom weaving filament yarn according to claim 2, wherein the synthetic pulp is meta-aramid pulp. 4. An air jet loom characterized in that when weaving a non-bulky filament yarn as a weft yarn of an air jet loom, fine particles for increasing air resistance during flight are attached to the weft yarn. Weaving method. 5. The weaving method for an air jet loom according to claim 4, wherein the fine particles are natural pulp and / or synthetic pulp having a Canadian standard freeness of 30 to 650 ml measured in a slurry state. 6. The method for weaving an air jet loom according to claim 5, wherein the synthetic pulp is meta-aramid pulp.