JPS5841923A - Production of yarn for crimp fabric - 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 relates to a method for producing yarn for highly twisted cotton fabrics such as dechine, georgette, willow, and voile.

The conventional manufacturing method for fine fabrics is to wind the yarn twisted using a strong twisting machine such as an Itari set twisting machine or an AraFlystar into a cylinder, and then stop the twisting in a moist heat sector to avoid any problems in the subsequent process. After weaving, graining was performed.

However, in such conventional methods, for example, when twisting a highly twisted yarn of polyester filament, the temperature is 70°C.
to 85°C, it takes about 30 to 50 minutes to set the twist, and moreover, twisting unevenness is likely to occur in the inner and outer layers of the yarn layer of the twisting cylinder, and the twisting unevenness can cause uneven grain and width of the fabric. It was causing the same amount of trouble.

The present invention solves the problems of the conventional method and provides a method for obtaining highly twisted yarn without uneven twisting at a low cost through a simplified process. The present invention provides a method for producing a yarn for crimped fabrics, characterized in that the multifilament yarn is given an actual twist of 1900 TA1 or more while being brought into contact with a heater to continuously stop the twist.

The present invention will be described in detail below with reference to the drawings.
As shown in the figure, the strong twisting yarn twisting machine pulls out yarn 1 from a bobbin 3 attached to a spindle 2 that rotates at high speed.
The yarn passes through a yarn path guide 4, passes through a traverse guide 6, and is wound onto a cylinder 8 by a winding roll 7. The number of twists applied to the yarn is set as the value obtained by dividing the 20 revolutions of the spindle by the winding speed of the winding low/I/7, but most of the twists are applied to the yarn path guide 4. It is well known that the section from the yarn path guide 4 to the take-up roll 7 serves as a yarn transfer section. A heater 5 is placed between this yarn transfer section.
When installed, after heater 5, twist is almost never added to the yarn (and stable setting is possible.

The type of heater is not particularly determined, and may be a plate heater, pin heater, band heater, etc., but care must be taken to ensure that the yarn is always in contact with the heater even when the yarn is reciprocated by the traverse guide 6. Of course.

By installing a heater in the yarn transfer section, yarn twisting and twisting are performed continuously, which not only simplifies the process, but also
Since the twist stopper applies a thermal effect uniformly to a single filament yarn, there is no occurrence of set unevenness due to the inner and outer layers of the thread wound around the cylinder 8, and uniform twist stop is possible. Furthermore, instead of setting all of the individual filaments that make up the yarn like threads that are twisted using the conventional method, setting is applied only to the filaments in contact with the heater, so it is possible to create a textured texture after weaving. At this time, the torque of the filament, which is not affected by the heat effect of the heater, is fully exerted, and the grain quality is also excellent.

The present invention not only omits processes, provides stable quality, and provides high-quality crimped fabrics, but also can be implemented at low installation costs because it is a modification of a conventional high-twisting yarn twisting machine by simply installing a heater. It is.

The setting temperature of the heater can be changed depending on the winding speed of the twisting machine and the number of twists, but as a general rule of thumb, it should be set at 20 to 30 degrees Celsius higher than the setting temperature of the moist heat setter. The temperature difference is almost the same as the difference in the set effect of dry heat.

Examples of the present invention will be shown below.

Example The experiment was carried out using polyester filament yarn 75/36 under the following conditions.

Twisting machine Itari complete set twisting machine spindo λ rotation speed 4700 rpm Number of twists
2. Q OQ T/M(S) and (2).

Thread speed! h, 6-Heater surface temperature 117°C When the above yarn was woven according to the following weaving specifications and subjected to normal graining processing, a crimped fabric with excellent graining effect and stable quality was obtained.

The table below shows the yarn quality of the yarn of this example and the yarn that was twisted under the same conditions as in this example except that the heater was removed and set at 85° C. for 40 minutes with a heating setter.

[Brief explanation of the drawing]

The figure is a side view showing an example of an apparatus used to carry out the present invention, and in the figure, each number indicates the following. (1) Filament yarn (2) Spindle (3) Bobbin (4) Yarn guide (5) Heater (6) Traverse guide (7) Take-up roll (8) Cylinoder

Claims (1)

[Claims] Thermoplastic multifilament yarn K. A method for producing a fine weaving yarn, characterized in that it is brought into contact with a heater while giving it an actual twist of 1000% or more and [the twist is continuously stopped].