SU1451190A1 - Method of producing thread from ribbon textile material - Google Patents

Abstract

The invention relates to the production of yarns from a strip material, in particular, to a method for producing NIN yarns, and to reduce the cost of the yarn obtained by recycling non-woven material. According to the method, a cutting edge with a linear density of 0.5-1.0 taxa of a nonwoven fabric web from a mixture of polypropylene and viscose fibers is used as a strip material. The strip material through the torsional body report a real twist, equal to 40-170 twist / m. At the site of communication of this twist, the strip material is subjected to heat treatment at a temperature selected from 120 to 300 ° C; .min; Z is the length of the heating zone, m; K - value of twist, twist / m; 1-dpina of torsion zone, m; n - rotational frequency of the torsional organ, min. with s

Description

01

"PA

The invention relates to the production of yarns from a strip material and concerns a method for producing such yarns.

The purpose of the invention is to reduce the cost of the yarn produced by recycling non-woven material.

According to this method, as a strip material, a cutting edge linear density of 0.5–1.0 tex of nonwoven fabric material from a mixture of 50–55% polypropylene and 45–50% viscose fibers is used. a twist equal to 40-170 twist / m and in the message section of this twist the strip material is subjected to heat treatment at a temperature selected from 126-300 0 according to

T f 420

60-Z K l / n

(one)

where T is the heat treatment temperature

band material, C; f is a coefficient equal to 1 ° C.

N steep, m, min;

Z - dpina heating zone, m; K - value of twist, twist / m; 1 torsion zone length, m; n - rotation frequency of a 1-organ organ, min

The magnitude of the twist imparted to the strip material is selected from the condition of giving the resulting yarn the necessary strength. With a twist of less than 40 twist / m, the strength of the thread slightly exceeds the strength of the cutting edge of the nonwoven material, which is about 1.5-2.0 kgf / mm. With a twist of more than 170 twist / m, the thread twists and twists.

The implementation of the heat treatment of the strip material at the site of the message of the actual twist allows to eliminate the spontaneous cutting of it and to get the thread with the necessary strength. At a temperature slightly higher than 120 ° C, a connection occurs, the surface of the spun strip material merges and a volume-filled tube material is formed from it, and as the temperature rises to 300 ° C, a uniform bundle of circular cross section is formed.

with

Q 5 0

five

thirty

35

dd

55

NIN due to more complete fusion of the fibers of the material.

At temperatures above 300 ° C, there is a sharp decrease in the strength of the yarn produced.

Dp providing the necessary strength of the thread the optimum value of the temperature of heat treatment of the strip material should be selected according to the experimentally obtained dependence

. "one----.

Sl 60-z-k-l / n

since according to experimental data with an increase in twist, the temperature of heat treatment must be reduced.

The experimental data on the strength of the yarn are given in the table.

Example. Used as a strip material, the edge of a nonwoven fabric is a 40-60 mm wide and 0.1 mm thick tape from a mixture of 50-55% polypropylene fibers and 50-45% viscose fibers made from wood pulp.

A tape with a torsion bar rotating with a frequency of 1000 minutes is reported by twists equal to 35, 40, 70, 100, 150, 170, and 180 twists / m, with a twist zone length equal to I, 5 m. equal to 0.7 m, the tape is subjected to heat treatment at a temperature determined by the indicated dependence and equal to 323, 308, 256, 228, 200, 181 and.

It was established that with a twist of 180 twist / m, the thread is twisted and broken. When the heat treatment temperature of the yarn is 323 C, it melts and breaks.

With a twist of 35 twist / m, the resulting yarn has a low strength, which is not sufficient to use the yarn.

This method allows to obtain a thread of necessary strength from the cutting edge of the nonwoven material and thereby use the waste of the nonwoven material, which helps to reduce the cost of the resulting yarn.

Claims (1)

Invention Formula The method of producing yarn from a strip of synthetic material, zak14511904 luchuyupshis in the message strip The material is processed through the section Body Actual New Round TGt ur T to a Tb heat treatment of strip materialloO Cnnf. ° predecess 120 by passing it through dependencies roar, different from that, T f -. V that, in order to reduce the cost of production, LP-gT L7 get the thread by recycling Nou / to 1 / p waste nonwoven material as strip material using where f - I, coefficient are cutting edge linear dense- S. kruchTm. TI 0.5-1.0 tex nonwoven fabric Z - length of the heating zone m " material from a mixture of polypropylene - the size of the viscose fibers, this popp-, with 1 the size of the twist, steeper / m; sovoy material jointly torsional ° torsion, "; . Equal to 40-170 twist / mGGT: p o-f round ™;  Notice not. P - melting of the thread (break); X - melting of the thread or due to the fragility of the thread.