JP3081629B2 - Acetate yarn for high-speed air jet room weft and method for producing the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improved acetate yarn for a high-speed air jet weft and a method for producing the same.

[Conventional technology]

Acetate fibers have excellent gloss, deep dyeing properties and moderate hygroscopicity, and are widely used in the fields of women's clothing, lining, and non-clothing.

In particular, demand for acetate taffeta and satin is increasing rapidly with the recent upsizing of clothing and the development of non-clothing applications. On the other hand, the air jet room has been improved in recent years,
Weaving at 0 rpm and even at 1000 rpm.

[Problems to be solved by the invention]

Conventionally, acetate yarn has been widely used as the weft of the air jet room, but with the speeding up of the air jet room, problems such as poor flight performance and variation in the arrival angle have occurred, and the speed of the air jet room has been increased. It is difficult to respond to the problem, and the stoppage rate is high at 800 rpm, and very difficult at 900-1000 rpm.

In other words, when weaving acetate fibers in the air jet room, it is usual to carry out sizing treatment on warp as usual, and unlike water jet room, weaving is performed in a dry state. Although there is no particular problem, weft conveyance is a special method using air jets for wefts.For higher speeds, using conventional production yarns as it is reduces the operating rate of the loom or lowers the quality of the fabric. There is a problem that it is difficult, and the advantage of speeding up is lost.

The operating rate and the quality decrease make it difficult for the weft to get on the air jet, which is the carrier fluid, and the weft cannot be inserted at the required high speed. Alternatively, the problem is caused by the fact that the weft is disturbed by the air jet and tangled, or a single yarn break occurs.The problem is that the air is diffusive and the conveying force is different from the conveying means of other looms, the shuttle, Since it is weaker than rapiers, grippers, waters, etc., it is caused by the fact that the conveying force is affected and fluctuated by the variation in the form and cross-sectional direction of the weft. Such ease of transport in the air jet room is a special property required only for the air jet room weft, which is generally referred to as flightability, and is a good match for the high suitability for the air jet room. It can be said that the yarn has a flight property, that is, a low air pressure and a stable weft at a constant pressure. In particular, in pursuing a higher speed of the air jet room in recent years, improvement of the flight property of the weft is one of the biggest problems, and an object of the present invention is to solve the problem.

[Means for solving the problem]

The present invention relates to a weft treating agent having 80 to 90 parts by weight of liquid paraffin spun through an n-sided nozzle hole, based on the fiber weight.
After dry spinning using a spinneret having a spinning hole having a spinning hole of 0.5 to 0.8% attached to a high-speed air jet loom weft weft [6 ≦ n ≦ 12] and an n-gonal hole [6 ≦ n ≦ 12]. A method for producing acetate yarn for high-speed air jet loom weft, characterized in that a weft treating agent having 80 to 90 parts by weight of liquid paraffin is attached to the fiber in an amount of 0.5 to 0.8% and wound up in a cheese form. To explain the present invention in more detail, the cross section of the conventional acetate yarn is formed by shrinkage of the inside of the yarn when the solvent in the spinning dope is evaporated because a spinneret having a round cross section is used. Therefore, the cross section cannot be regulated, the number of convex portions in the cross section varies, and the yarn quality varies between the single fibers.If this variation is used as the weft for the air jet room, the single yarn breakage may occur. Because of the problem, it is necessary to regulate the cross section of the yarn. In this regard, as a result of earnest studies, the inventors have found that a weft treating agent having 80 to 90 parts by weight of liquid paraffin spun through a spinneret having an n-gonal shape (where 6 ≦ n ≦ 12) is 0.5 to the fiber weight. It has been found that when the acetate fiber having an adhesion of about 0.8% is used as the weft of a high-speed air jet loom, there is no problem such as breakage of a single fiber and the flight property is stable.

With respect to the range of n of the n-square spinneret, if n exceeds 12, the variation in the cross-sectional shape between the single fibers becomes large, which causes breakage of the single yarn. Further, since the hole shape of the base for the acetate filament is extremely small with respect to other synthetic fibers, when n exceeds 12, it becomes difficult in terms of the manufacturing precision of the base. When n is small, the flight performance of the high-speed air jet loom is good, but the appearance, texture, bulkiness, anisotropic glossiness and the like of the conventional fabric (by the circular spinning hole) are different. Needs 6 or more.

Further, the acetate yarn for high-speed air jet loom weft of the present invention needs to have a weft treating agent having 80 to 90 parts by weight of liquid paraffin attached thereto in an amount of 0.5 to 0.8% based on the weight of the fiber. If the amount of the weft treating agent having 80 to 90 parts by weight of liquid paraffin is less than 0.5% based on the weight of the fiber, loops, fluffs, thread breaks, and the like occur due to contact with the traverse guide during cheese winding. On the other hand, if the attached amount exceeds 0.8%, the flight property of the weft by the air jet becomes unstable. The weft treating agent used in the present invention is composed of 70 to 50 parts of liquid paraffin having 9 to 18 carbon atoms and 30 to 50 parts of liquid paraffin having 19 or more carbon atoms in consideration of volatility and uniform adhesion. A treating agent using 80 to 90 parts by weight of liquid paraffin having a viscosity at 5.7F of 5.7 to 8.7 centistokes is preferred. This treatment agent improves uniform adhesion,
Compared with the conventional acetate filament, the amount of adhesion can be reduced and can be 0.8% or less.

After the yarn of the present invention is dry-spun using a spinneret having an n-gonal [6 ≦ n ≦ 12] spinning hole, a weft treating agent having 80 to 90 parts by weight of liquid paraffin is added to the yarn for 0.5 to 0.5 parts by weight based on the fiber weight. It can be obtained by attaching 0.8% and winding it up into a cheese form. Conventionally, for winding, the weft used for air jet looms has often been a cone wound, but the peeling tension rises sharply at the innermost layer of the cone wound when driving the weft, causing poor flight performance, and Since corn winding is rewinded into a corn form by spinning after spinning, the cost increases, and it is necessary to wind it up with a cheese winder.

 Hereinafter, the present invention will be described more specifically with reference to examples.

Example The diacetate filament yarn 100d / 27f was spun at a spinning speed of 700 m / min by variously changing the shape of the spinning hole, and a weft treatment agent (70 to 50 parts of liquid paraffin having 9 to 18 carbon atoms, 19 carbon atoms) 0.8 to 50% by weight of liquid paraffin consisting of 30 to 50 parts of the above liquid paraffin and having a viscosity of 5.7 to 5.8 centistokes at 86 ° F (0.8 to 90 parts by weight) was adhered and wound by a cheese winder. .

The yarn quality of the obtained yarn and the number of revolutions of 9 using an air jet loom (ZA-103-2C-150-48FDP manufactured by Tsuda Koma Kogyo Co., Ltd.)
Table 1 shows the measurement results of the arrival angle at 00r.pm.

Note: The arrival angle of the air jet loom is determined by setting the appropriate main pressure and sub-pressure of each yarn, then measuring the arrival angle for each pit with a Tsuda Koma Industries Co., Ltd. Weft Arrival Analyzer, and averaging 1000 picks. (X) and standard deviation (δ).

From Table 1, it is found that the yarn obtained from the n-sided [6 ≦ n ≦ 12] spinneret of the present invention has a small standard deviation of the arrival angle and has a stable flight property of the weft. The yarns obtained from the square, 14-sided, and circular die holes (Comparative Examples) had a large standard deviation of the arrival angle, and the flight performance of the weft was not stable.

[Effects of the Invention] The weft treating agent having 80 to 90 parts by weight of liquid paraffin, which is spun through a spinneret of n-square [6 ≦ n ≦ 12] of the present invention, has a content of 0.5 to 0.8% based on the weight of the fiber. The attached acetate fiber has a special effect that the variation in the arrival angle of the weft at the time of weaving by the high-speed air jet loom can be reduced and the flight performance can be greatly improved.

Claims (2)

(57) [Claims] An acetate yarn for a high-speed air jet loom weft spun through an n-square hole and having a weft treating agent having a liquid paraffin content of 80 to 90 parts by weight adhered to the fiber weight by 0.5 to 0.8%. [However, 6 ≦ n ≦ 12] 2. After spin-dry spinning using a spinneret having a spinning hole having an n-gonal shape (where 6 ≦ n ≦ 12), a weft treating agent having 80 to 90 parts by weight of liquid paraffin is added to the fiber weight. A method for producing acetate yarn for high-speed air jet loom wefts, wherein 0.5 to 0.8% of the mixture is adhered and wound into a cheese form.