SU451370A1 - Method of producing synthetic velour - Google Patents

Description

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The invention relates to the manufacture of nonwoven pile fabrics. one

A known method for producing synthetic velor is that a base is formed from a mixture of different fibers, which is subjected to needling and thermal shrinkage, followed by impregnation with a polymer solution, drying, grinding / emulsion treatment, and final drying.

The proposed method allows to obtain a material with increased resistance to multiple deformations, with sufficient loosening of the fibrous-porous structure, which creates improved velor-like properties.

This is achieved by the fact that the material, after the final drying, is subjected to deformations of stretching and bending in a tractor.

The method is carried out as follows.

The fiber base is formed on the available carding machines, equipped with an aerodynamic or mechanical transducer, and chemical fibers can be used in combination with natural fibers, such as collagen fibers. Needling is carried out on one side, and thermal shrinkage is carried out in air at 100-160 ° C, depending on the nature of the fibers. This is followed by the impregnation of the base with solutions of polymers, for example polyether-amines, or dispersions of polymers, for example, methacrylic acid-based latex. After drying and grinding, they are impregnated with an emulsion, for example, on the basis of low-molecular-weight plasticizers, which cause swelling of the polymer, or on the basis of animal fats. Dyeing the base in the desired color can be achieved in various ways:

0 using colored fibers or colored solutions, or dispersing polymers, or dyeing the impregnated base in a dyebath.

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After the final drying, the material is processed on a fine linen machine, for example, Mollis type.

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At the same time, as a result of the partial destruction of the structure, the material becomes velure-like.

Example. The non-woven base is made from 50% collagen and - 50% shrink polyethylene fiber. A fibrous layer with a mass of 250 g / cm is formed on a roller carding machine with a mechanical web converter. Needle punching fiber-. The SLO5 is made from two sides to a total density of 510 punctures per cm with a varying depth of 7 to 3 mm. Shrinkage is carried out in an evacuated medium at EO-CW for 1 minute. .

The base is impregnated with a dyed solution of polyether urethane of the Sanpren type g-412 of 15% concentration in dimethylformamide (DMF)

After drying, the substrate is ground on one side and spalled on the other side. Dye the solution to the desired color by adding Dyce pigment paste.

In the process of impregnating the base with the colored solution, it simultaneously dyes it in the specified color. Through-porosity in the impregnated base is formed by coagulation structure formation in a mixture of DMF and water. The polymer content in the impregnated CCJOBe is 40-45%. After washing off the DMF residues, squeezing out excess moisture and drying, the base is treated with an emulsion consisting of 80% sulphated burglar and 20% alizarin oil at pH 8.0-9.0 and at a temperature of 55-65 C. emulsions and washing the material with warm water with a temperature of 30-35s. After drying the material to a uniform humidity at 50-6 ° C, it is mechanically processed by a pulverizer, for example

Mollis type.

Claims (1)

Invention Formula The method of obtaining synthetic velor 20 by forming a fibrous ocHOBk, needling it, thermally shrinking it, impregnating it with a polymer solution, drying it, grinding it and processing the emulsion with a final 25 times drying, in order to improve the quality, the material is subjected to deformation after finishing drying and bend 2Q per tonnage machine.