JP2001271232A - Method for spinning spun yarn having little fluff - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a spun yarn having little fluffs in the spinning of a fiber having short fiber length such as cotton fiber as well as the spinning of a long fiber such as wool. SOLUTION: A fiber bundle delivered from a front roll of a ring spinning frame is spun to obtain a spun yarn by applying real twist by the rotation of a traveler. In the above process, the application of real twist with the traveler is carried out simultaneously with the application of false-twist with a false- twister placed between the front roller and a snell wire to cover the fluffs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a spun yarn with less fluff.

[0002]

2. Description of the Related Art A spun yarn obtained by spinning various types of short fibers is characterized by having fluffs from which the tips of the short fibers protrude from the yarn, and the fluffs are produced using the spun yarns. Although the fabric has various advantages such as good texture, warmth, and thickness, it also has drawbacks such as easy formation of pills, and depending on the application, spun yarn or fabric using this can be baked. Methods have been adopted to reduce fluff. As a method for producing a spun yarn with less fluff at the time of spinning, there is a “solo spun” spinning method jointly developed by the Australian Federal Institute of Science and Technology (CSIRO), the New Zealand Wool Research Institute (WRONZ) and the Woolmark Organization. . In this method, the fiber bundle sent out from the front roll is guided to a roll having a fine groove installed immediately below the front roll, and after dividing the fiber bundle into three or four parts, a real twist by a traveler is applied and a spinning method is used. Accordingly, a fiber in which the constituent fibers are well entangled, has a strong resistance to tension and friction in the yarn direction, and has less fuzz on the surface of the yarn is obtained. However, this spinning method is effective when the fiber length of the fiber that can be spun by the worsted spinning method is long, but when the fiber length as applied in the cotton spinning method is short, the fiber bundle is used. It is difficult to maintain the split state of the fibers, and as a result, it is difficult to obtain a spun yarn with less entanglement between fibers and less fluff on the surface.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and provides a method of spinning a spun yarn with less fluff which is effective not only in spinning long fibers but also in spinning short fibers. The purpose is to do so.

[0004]

SUMMARY OF THE INVENTION The present invention has been accomplished to achieve the above object, and a fiber bundle delivered from a front roll of a ring type spinning machine is subjected to actual twisting by rotation of a traveler and spun as a spun yarn. Spinning of spun yarn with less fuzz, characterized by performing false twist by applying a false twist by a false twist device provided between the front roller and the snell wire and applying a real twist by a traveler. The gist is a method.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. The present invention provides, when spinning with a ring type spinning machine, a given draft in a draft zone to a roving supplied from a back roll, and a fiber bundle sent out from a front roll to give a real twist by rotation of a traveler to a fiber bundle sent from a front roll. This is a method of spinning a spun yarn by applying a false twist with a false twist device provided between a front roller and a snell wire. The ring-type spinning machine used in the present invention is not limited to long-fiber spinning for spinning long fibers such as wool, but also various ring-type spinning machines in cotton spinning for spinning fibers having a small fiber length such as cotton. Applicable in spinning machines.

FIG. 1 is a schematic view of a ring spinning machine showing a spinning method according to the present invention. Roving A supplied to a back roll B of the ring spinning machine is transferred from a back roll B to a front roll C. A given draft is given in the entire draft zone, and the fiber bundle D sent out from the front roll C is supplied to a false twist device E provided between the front roll C and the snell wire F, and is given false twist, Further, a real twist is given by the rotation of the traveler G, and is wound up on a bobbin H mounted on a spindle. In the present invention, in order to obtain a spun yarn with less fluff, it is preferable to supply two roving yarns to be supplied to the back roll B.

As the false twisting device in the present invention, a swirling airflow injection nozzle for generating a swirl by compressed air in the yarn path may be used, but false twisting is performed while sucking the fiber bundle sent out from the front roll. It is preferable to use a swirling airflow injection nozzle of a type that can be used. As an example of the nozzle structure having such performance, a nozzle structure having a vertical cross section in FIG. 2 and a horizontal cross section including the center line of the air supply port in FIG. 3 can be mentioned. The swirling airflow injection nozzle is adapted to allow the compressed air flowing from the compressed air inflow pipe 1 to receive a donut-shaped cavity 2.
Through the four air injection ports 3 provided in a direction tangential to the wall of the yarn flow pipe 6 from the yarn introduction port 4 to the yarn discharge port 5 and inclined with respect to the yarn flow direction. It is injected and acts as a swirling flow, and also functions to suck the yarn from the inlet of the yarn which has a negative pressure. When the swirling airflow injection nozzle having the function of sucking the yarn is used as described above, it is not necessary to stop the injection of the air at the time of starting, and the threading operation can be efficiently performed.

[0008]

According to the present invention, the false twist imparted by the false twist device E provided between the front roll C and the snell wire F is concentrated and propagates at the nip point of the slant roll.
Twist the fiber at the nip point, and with it the Traveler G
The fibers twisted with the real twist propagated from the fiber bundle can be fixed, and the fibers protruding from the fiber bundle body, that is, the fluff can be spun out.

[0009]

Next, the present invention will be described in detail with reference to examples. The evaluation of the spun yarn in the examples was performed by the following method. 1) Single yarn strength, single yarn elongation Measured according to the constant length elongation method of JIS L1095. 2) Fluff index The number of fluff having a fluff length of 3 mm or more per 100 m was measured at a yarn speed of 50 m / min using a FRAY COUNTER. 3) Enclosing force Using a warp enclosing force tester manufactured by Hiruta Riken Co., Ltd.
The number of times until cutting was measured under the conditions of times / minute and a load of 60 g.

Example 1 Two roving yarns of 130 g / 30 yd made of 100% cotton are supplied from a back roll, drafted at a total draft of 31.39 times, and the spindle is rotated at 10,000 times / min. When spinning a yarn of 30 counts of English cotton count by giving a twist of 21.9 T / inch in the direction, a front roll C and a snell wire F of a cotton spinning ring spinning machine whose structure is schematically shown in FIG. Between them, a swirling airflow injection nozzle showing a vertical cross section and a horizontal cross section including the center line of the air supply port in FIGS. 2 and 3 is provided as a false twisting device E, and compressed air having an air pressure of 98000 Pa is supplied and spun out. A spun yarn according to the invention was obtained.

Comparative Example 1 In Example 1, 130 gel / 30% of 100% cotton was used.
Instead of using two yd roving yarns, using one 100% cotton 260 gren / 30 yd roving yarn and stopping the use of a false twisting device for the swirling airflow injection nozzle, A spun yarn having a cotton count of 30 was obtained. Table 1 also shows the evaluation results of the spun yarns of Example 1 and Comparative Example 1.

[0012]

[Table 1]

As is clear from Table 1, the spun yarn according to the present invention had less surface fuzz and a stronger binding force than the spun yarn of Comparative Example 1 spun by the conventional method.

[0014]

According to the present invention, spun yarn with less fluff can be spun not only in spinning long fibers such as wool but also in spinning fibers having a short fiber length such as cotton. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a ring spinning machine according to the present invention.

FIG. 2 is a vertical sectional view of a swirling airflow injection nozzle that can be used in the present invention.

FIG. 3 is a horizontal sectional view including a center line of an air supply port of the swirling airflow injection nozzle of FIG. 2;

[Explanation of symbols]

 Reference Signs List A roving yarn B bar roll C front roll D fiber bundle E false twist device F snail guide G traveler H bobbin 1 compressed air inflow tube 2 donut-shaped cavity 3 air injection hole 4 yarn introduction hole 5 discharge hole 6 yarn circulation tube 7 Upper frame of nozzle 8 Lower frame of nozzle

Claims (1)

[Claims] 1. A false twisting device provided between a front roller and a snell wire when a fiber bundle sent from a front roll of a ring type spinning machine is subjected to actual twisting by rotation of a traveler and is spun as a spun yarn. A method of spinning a spun yarn with a small amount of fluff, characterized in that the false twist is applied and the real twist is applied by a traveler, thereby performing fluff binding.