RU1838478C - Method of nonwoven material making - Google Patents

Abstract

The essence of the invention: before preparing an aqueous suspension of reindeer wool in an amount of 70-85% by weight of the material is treated with an alkaline solution of a concentration of 8-12 g / l, while mixing them and heating to 40-50 ° C, then a binder is introduced. cast on a cloth, dehydrated and dried. 1 s.p. crystals, 3 tab.

Description

The invention relates to the textile industry, in particular to the manufacture of nonwoven materials from high-density fibers, not processed by traditional methods, and can be used in the textile industry, in construction as a heat-insulating, sound-absorbing material.

An object of the invention is to increase the performance of a nonwoven fibrous material.

This is achieved by the fact that reindeer wool fibers in the amount of 70-85% by weight of the material are used as fibers, which are treated with an alkaline solution of a concentration of 8-12 g / l, while mixing them and heating to a temperature of 40-50 ° C, before preparing the suspension. and in the amount of binder, acronal is used. This ensures

reduction of stiffness, brittleness of reindeer wool fibers, they are crimped. As a result, the adhesion of the fibers to each other is improved, which leads to an increase in the strength properties of the material. Deer wool fibers are bonded to the canvas by gluing them at the drying stage of the adhesive composition introduced into the molding bath. The improvement of the operational properties of the nonwoven material is due to the fact that when the canvas is formed from an aqueous suspension, the fibers do not receive a preferential orientation in any direction, their arrangement is random, due to which the material has anisotropy of properties, i.e., at any particular point the material properties will be the same. In accordance with this, it has a higher and evenly distributed thermal insulation, sound absorption C

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glossy, strength properties, as well as sufficient breathability.

A method for producing a glued nonwoven material is carried out as follows.

Deer wool in the amount of 70-85% by weight of the material is treated with an alkaline solution of a concentration of 8-12 g / l, while stirring it and heating to a temperature of 40-50 ° C, neutralized by washing with water, a suspension of the degraded fibers is prepared, introduced a liquid binder, using Acronel, is molded, dehydrated and dried.

Example. An alkaline solution of a concentration of 8 g / l is prepared, to which deer wool is added in an amount of 70% by weight of the material, mixed and at the same time heated to a temperature of 40 ° C until the required fiber degradation. The degraded fiber in the solution is cast onto a mesh and washed with running water. The prepared reindeer wool fibers are placed in an aqueous solution of acronol with a concentration of 500 g / l. Then, a fiber deck is formed onto the net by casting slurries containing fibers and a binder. The moisture is removed from it by a mechanical press. The material is dried in an oven at a temperature of 40 ° C. The properties of adhesive non-woven materials obtained by this method are presented in table 1. The analysis of the table shows that the best performance properties of the material are ensured with the content of the binder acronalp in the amount of 15-30%, and the fibrous material 85-70%.

The sound absorbing capacity of the reindeer wool adhesive non-woven material is shown in Table 2. The data are given in comparison with materials traditionally used as sound absorbing. It can be seen from the table that the use of adhesive non-woven material based on deer wool will improve the sound absorption effect in comparison with the materials currently used.

Table 3 presents the strength data of the adhesive non-woven material of reindeer wool under various conditions of fiber pretreatment with an alkaline solution.

When the concentration of the alkaline solution is below 8 g / l, the strength characteristic decreases due to the weak effect of the solution on the fiber structure. At a concentration above 12 g / l, the reindeer wool fibers are intensively degraded and the resulting strength properties of the material are reduced. This temperature range used in the production of nonwoven materials was chosen for economic reasons, since at a temperature of 40 ° C the speed of the process is quite high, at a temperature above 50 ° C, the cost of electricity increases significantly.

Therefore, the nonwoven material of the proposed composition (table. 1.3) has significantly higher heat-shielding (0.0195-0.0351 W / m s), sound-absorbing (0.31-0.72), strength properties (35-61 N ) with a sufficient level of breathability (594.8-1099 dm3 / m2s).

The use of the claimed invention makes it possible to obtain non-woven material from deer wool waste having a number of valuable operational properties.

Claims (2)

1. A method of producing a nonwoven material, comprising preparing an aqueous suspension of fibers, introducing a liquid binder, casting a web, dehydrating and drying, characterized in that, in order to improve the operational properties of the material, fibers of reindeer wool in an amount of 70-85% are used from the mass of material that before preparing the suspension is treated with an alkaline solution of a concentration of 8-12 g / l, while mixing them and heating to 40-50 ° C. 2. A method according to claim 1, characterized in that acronal is used as a binder, Table 1 table 2