SU1063875A1 - Die for producing profiled chemical yarn - Google Patents

Abstract

MASTER FOR OBTAINING PRO-. FILIROB / SHNI CHEMICAL THREAD, profile, the cross section of each spin hole of which is formed by two transverse slots, the middle part of which successively intersects at a 90 ° angle longitudinal slit, characterized in that, in order to improve the performance properties of the thread by increasing Dye sorption lines, the middle part of each transverse slit is made with the extension, the width of which adjacent to the intersection with the longitudinal slit is 1.5-2.5 widths of the transverse slit, and the distance between the transverse slits with leaves 0.2-0.4 the length of the longitudinal slit, while the length of the transverse slit prior to its expansion is 0.15i 0.25 of its total length, and the length of the longitudinal slit is 1.1-1.5 long (L .ny transverse slit.

Description

The invention relates to the production of chemical threads and is intended! to obtain profiled chemical threads having good sorption of the dye and used, for example, for the manufacture of ink ribbons for printing devices.

Known die to obtain a profiled chemical thread, the cross-sectional profile of each spinning hole which is formed by two transverse slots, the middle part of which sequentially intersects at an angle of 90 longitudinal slit [1].

However, the cross section of the yarn obtained using the specified spinning hole profile has insufficiently raised protrusions and depressions, which does not allow these threads to have sufficient dye sorption. Because of this, the prints from the tape obtained from such filaments are initially dirty and smeared, and then the brightness of the prints decreases sharply, which limits the life of the tape.

The purpose of the invention is to increase the operational properties of the filament by increasing the sorption of the dye.

This goal is achieved by the fact that in the die to obtain a shaped chemical thread, the cross-sectional profile of each spinning hole of which is formed by two transverse slots, the middle part of which successively intersects a longitudinal slit at an angle of 90 °, the middle part of each transverse slit is made with an extension, the width of which adjacent to the intersection with the longitudinal gap, is 1.5-2.5 widths of the transverse gap, and the distance between the transverse cracks is 0.2-0.4 lengths of the longitudinal gap, while the length of the pop the slit of the slit before its expansion is 0.15-0.25 of its total length, and the length of the longitudinal slit

In FIG. 1 shows a profile of a spinning hole of a die; in FIG. 2 is a cross-sectional profile of a thread obtained using this die.

In FIG. 1 the following designations are accepted: a - width of the transverse and longitudinal slits; B is the length of the longitudinal slit, c is the length of the transverse slits, w is the distance between the transverse slits, I is the length of the transverse slit before it begins to expand, and S is the width of the expansion of the transverse slit.

- To obtain a cross-sectional profile of a thread having optimal sorption of the dye, it is necessary to maintain the following relations between the profile elements:, expansion of the transverse gap in 1.5- '

2.5 times the width of the slit | = 1.5-2.5;

the distance between the transverse slits is 0.2-0.4 lengths of the longitudinal slit (0.2-0.4) 1 _{} the} length of the transverse slit before it begins to expand is 0.15-0.25 of its total length

^. = 0.15-0.25;

length of the longitudinal gap is 1.1-1.5 lengths of the transverse gap

B "1.1-1.5.

When forming through such a spinning hole, a thread is obtained with a cross-sectional profile in the form of a double rhombus (Fig. 2) having M capillaries in the form of triangles open from the base side. These capillaries M together with capillaries formed between adjacent filaments in the complex filament, communicating with the outer surface, provide high sorption and fixation of the dye on the surface. nit.i, as well as its good desorption during operation, chtr_ provides an increased service life of the tapes of printing devices.

VNIIIPI Order 10481/29

Circulation 461 Subscription

Branch of PPP Patent ”,

Uzhhorod, Project 4,

Claims (1)

FILIER FOR OBTAINING PROFILED CHEMICAL THREAD, profile. the cross section of each spinning hole which is formed by two transverse slots, the middle part of which successively intersects the longitudinal slit at an angle of 90 °, so that, in order to increase the operational properties of the filament by increasing the dye sorption, the middle part of each the transverse gap is ¹ yen with an extension whose width adjacent to the intersection with the longitudinal gap is 1.5-2.5 times the width of the transverse gap, and the distance between the transverse cracks is 0.2-0.4 lengths of the longitudinal gap, this the length of the transverse gap before its expansion is 0.150.2 5 of its total length, and the length of the longitudinal gap is 1.1-1.5 of the length of the transverse gap.