SU908976A1 - Method for producing synthetic sewing thread - Google Patents

Description

(5) METHOD FOR TEACHING / SYNTHESIS OF A SYNTHETIC SEWING THREAD

one

The method relates to the textile industry and can be used in the texturing of complex synthetic yarns for the production of sewing threads.

There is a known method for producing a textured sewing thread, which includes spinning a single thread, stitching, torsion and texturing.}

This method is very laborious (four separate transitions), does not fix the structure of the textured yarn, which increases the breakage in tailoring and deteriorates the performance properties of the thread, reduces the strength of the finished thread, since the texturing process is carried out last. Carrying out the process is a separate way: it increases the diversity of the strands.

There is also known a method for producing a synthetic sewing thread, in which tiling, torsion, and pneumatic texturing are performed.

At least two complex yarns with the same linear density and with the same direction of twist, followed by removal of the thread to the release organ 2.

However, the known method does not allow obtaining high quality threads with good performance properties.

The purpose of the invention is to improve the quality and performance properties of the thread.

Claims (2)

The goal is achieved by the fact that in the method of producing synthetic sewing nyiu, in which forgiving, torsion, pneumatic texturing of at least two multifilament yarns with the same linear density and with the same direction of twist, followed by removal of the yarn to the outlet, the drive t after texturing with a twist factor of 18-25 with a twist direction opposite to the twist direction of the multifilament yarns; 4-22 and the rate of their removal, the texturing lead to the speed of the outlet body. Texturing and milling are carried out at the same feed rates and the same tension of the feeding complex yarns. In the proposed method, synthetic multifilament yarns with a linear density of 15.6 tex (K 6) -5.0 tech (tf 200), having corresponding twist coefficients, are used as the initial yarn. Two or more complex yarns of the same linear density of the aforementioned are connected (cane) when fed to a texturing zone, which is an axis that exists in the pneumatic head under the action of compressed air {pressure 5.5 atm). In the texturing zone, two or more complex yarns are fed simultaneously at the same speed as one system, i.e. all the fed yarns are core or core. The reel is wound onto a tapered bobbin and the textured thread through the outlet bore itself rotates the axis of the device and provides feeds to the pneumatic head through the feed unit of the initial threads in predetermined proportions. Thus, texturing is carried out at the speed of the outlet organ and with different feed and selection of nites to the pneumatic head. A compressed air jet under pressure, 5 atm. Inflates the threads passing through the head, and causes the filaments of an excessively supplied length of one strand to be placed between the filaments of an excessively supplied length of another thread. When the pneumatic head exits, the main length of the yarn is shortened and BwtKaMH twists tightly clamp the filament loops between the excessively long filaments between the filaments of the filaments. The compressed air is supplied from the compressor - through the receiver. If the texturing process is carried out at equal speeds and tension of the feeding multifilament yarns, the ready thread will not meet the requirements of the sewing threads; it will have lower strength, uneven and loose, fortified structure, which causes 64 breakage during high-speed tailoring. Lower strength is obtained due to the fact that the load is taken on only by that thread, which is fed at a lower speed and more tension. If, during texturing, the feed rate of the thread is less than t% of the rate of withdrawal of them, then the thread will not have a uniform textured structure and much. little will be different from the original thread. If the feed rate of the thread is more than 22%, then the ready thread will be too fluffy, unsuitable in -. shive . Example. For the production of 15.6 tex X 2 {# 6V2) polyamide sewing thread, a 15.6 tex nylon complex was used (No. 6k} with a twist coefficient of 06-25, S for twist direction. The processes, sweeps and texturing were carried out on a winding machine equipped with pneumatic heads at a texturing speed of 77 m / min, air pressure of 5.5 atm. Two nylon complex threads 15.6 Tex are delivered.in the texturing zone with the same tension and the same feed speed with a difference in feed and output of the textured thread 7% - Torsion is carried out after textured on a KM-83 twisting machine with a rotational speed of 5500 minutes, with a twist of 480 kr / m, Z — torsion directions. Using the proposed method for producing sewing threads would allow getting sewing threads with a fixed structure and increased strength. Expand the range of sewing threads by eliminating runaway twisting and spilling rounds in the process of sewing and unraveling seams, increase productivity by eliminating two technological transitions (twisting and combining stitching with texturing) and improving the sewing properties of eynoy thread. Claim 1. A method of producing a synthetic sewing thread, in which stinging, twisting, pneumatic texturing of at least two multifilament yarns with the same linear density and with the same twist direction, followed by removal of the thread to the outlet, characterized in that, in order to improve the quality and operational properties of the thread, the torsion of the complex yarns is performed after texturing with a twist factor of 18-25 with the twist direction opposite to the twist direction of the complex yarns; the filing of filaments exceeds the speed of their roll by D-22, and texturing is done with the speed of work of the discharge organ. 089766 2. A method according to claim 1, characterized in that the texturing and forgiving are carried out at the same feedrate and the same tension of the filing complex threads. Sources of information taken into account in the examination  1. US Patent If 3153895, cl. 57-1, 1964. 2. US Patent V 1080777, 57-1U, 1978. cl