SU1258909A1 - Profiled chemical filament - Google Patents

Description

The invention relates to the production of chemical yarns and can be used in knitwear and silk.

The purpose of the invention is to improve the extrinsic properties of the thread.

The drawing shows the proposed thread, the cross section.

The profiled chemical thread is characterized by the following parameters: О radical center of the circles; r is the radius of the circle inscribed in the profile; R - pa; schus of the circumscribed circle; L is the large base of the petal trapezium; 1 - small base of the petal trapezium.

The following relations take place between the profile elements: coefficient of modification, i.e. ratio, 0-2.5; the ratio of the large base of the trapezium of the petal to the small, 7-2.2; the ratio of the radius of the circumscribed circle to B. the large base of the petal trapezium, 03-1,12

With an increase in the modification ratio of more than 2.5, a decrease in the L / 1 ratio of less than 1.7 and an increase in the R / L ratio of more than 1.12, the profile lobes are lengthened, leading to an increase in the breakage of the yarn when it is broken and processed, thereby reducing the technological properties

By reducing the modification coefficient to less than 2.0, increasing the L / 1 ratio to over 2.2 and decreasing the R / 1 ratio to less than 1.03, the thread profile tends to a circular cross section, and the consumer properties of the thread decrease, since only the profiled threads have the necessary quality.

Editor A. Kozoriz

Compiled by V.Prokhorov

Tehred I.Popovich Proofreader S. Shekmar

Order 5093/29 Circulation 432 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

With an increase in the coefficient (}) of the modification modification more than 2j5, a decrease in L / 1 less than 1.7 and with an increase in the R / L ratio of more than 1.12, the neck worsens — the fabric becomes coarse, rough to the touch.

Reducing the coefficient of modification to less than 2.0, increasing the ratio L / 1 to more than 2.2 and reducing the ratio R / 1 to less than 1.03, the thread stiffens the material and reduces elasticity.

The most optimal ratios are f &, in which the thread with the proposed cross-sectional profile has a silky neck, a carcass, a soft degree of gloss that gives the canvas a proper look, are the following 1e: coefficient of modification, i.e. ratio, 42; the ratio of the large base of the trapezoidal lobe to the small L / l 2.0; the ratio of the radius of the circumscribed circle to the large base of the petal trapezium, 08.

During molding, due to the relaxation of internal stresses at the exit of the polyamide melt through the holes of the spinneret, it is possible to obtain a thread profile, in which the petal trapedias have convex sides.

The proposed chemical textured yarn has improved performance properties, which make it possible to produce griffed fabrics that meet modern fashion requirements for the exterior design, which have a low surface density, increased bulkiness, good drapeability, softness, varying degrees of gloss or dullness .

Claims (1)

PROFILE CHEMICAL FILM having a cross-sectional profile bounded by interconnected polygons with rounded peaks, characterized in that, in order to improve operational properties, each polygon is made in the form of an isosceles trapezoid with a larger base to a smaller ratio of 1.7-2 , 2, the ratio of the radius described around the entire profile of the filament of the cross-section of the circle to the inscribed radius of 2.0-2.5. é sl 00 © © c ©