SU687147A1 - Method of obtaining thermoplastic, profiled threads - Google Patents

Description

(54) METHOD FOR OBTAINING THERMOPLASTIC, MATHED PROFILE THREADS

The invention relates to the production of chemical threads.

A known method for producing α-thermoplastic, matted, shaped filaments by high-speed molding of a fiber from a polymer melt containing an additive of titanium dioxide, cooling the fiber with air flow, winding the filaments and stretching them at 90-1 bC 1.

However, the known method does not increase the consumer properties of the thread and requires two-stage processing.

The purpose of the invention is to increase the consumption of yarn properties and increase productivity.

This is achieved by the fact that the fiber is molded from a polymer with the addition of titanium dioxide of 0.360, 44% by weight of the polymer, at a speed of 1200-1500 m / min, and the strands are pulled after cooling before winding.

FIG. 1 - the profile is shown to take the die; in fig. 2 - cross section of the threads.

The method of obtaining thermoplastic: frosted, profiled filaments, such as polyamide, includes

sequential high-speed spinning of the fiber, carried out from a polymer melt containing an additive of titanium dioxide, 0.36-0.44% by weight of the polymer, at a speed of 1200–1500 m / min, cooling the fiber with an air stream at a speed of 20–35 cm / sec, stretching the threads at 90-160 ° C with a draw ratio of 2.6-3.0 and winding the threads at a speed of 34 00-4000 m / 1in.

Example 1. To obtain profiled yarns, 5 Tex polycaproamide with the addition of T 0 in the amount of

5 0.4 ± 0.04% molded through the die plate. The temperature of the molten polycaproamide is 270 ° C, the pressure in front of the spinneret set is bcps / cm. Forming speed 1200 M / NMH. These are cooled in the blower shaft at an air speed of 25 cm / s and a temperature of 23 ± 3 ° C.

The threads are pulled at a temperature of 150 ° C and wound onto a forging at

5 speeds of 3400 m / min.

Example 2. In preparing the 10 Tex yarn, a polymer is used with the same parameters as in Example 1.

lim;

60 + 1 kgf / cm

molding speed

1500 m / min, air velocity in the blowing charge 30 cm / s, blowing air temperature 25 ±, plasticizing temperature at pulling 150 ± l С.

Linear speed of suction newspapers and thread winding 4000 m / min.

PR and dM ER 3. Upon receipt. (15.6 Tex using a polymer with the same parameters as in Example 1. The polycaproamide temperature before forming was 278 ± 2 ° C, the pressure of the polymer before the spinneret set was 60 + 1 kgf / cm, velocity of the front and 1300 M / rvi; -n- :, air velocity in the blower iiiaxTe 35 cm / s, blowing air temperature 21,.:,;: .- ;. cheers of plasticization - for d: 3 1 C, lkkvinnya speed.): Curtain x galet and thread winding 3400-g / h-h; -.

ITpej: ;;: o, the method provides g: s-l. ;;: the consumer's igi Igii, Cr1h: kata crystalline - :: - 1 f: Oj.yuvio.-p; i; 1e; zed; pulling out

maintains the thread section profile, reduces breakage and improves performance.

Claims (1)

1. Patent of England No. 1471096, cl. B 5 B, 1977,