SU55986A1 - A method of making artificial leather - Google Patents

Description

This invention relates to a process for the manufacture of artificial leather from a rubber mixture with a fibrous filler, obtained on rollers.

Typically, the processing of fibrous fillers is performed by a solution of rubber in gasoline in the ratio: 1 part of rubber 12 parts of gasoline.

Such a huge fuel consumption in the absence of recovery is disadvantageous from the economic side and, moreover, represents a great fire hazard. On the other hand, attempts to produce fiber plastic by the rubber production method — the introduction of dry rubber with the addition of rurax, animal fibers at the time of rubber masticating on hot rollers, as the masticating of dry rubber oxidizes the latter, and the rubber loses a significant proportion of the original elasticity and viscosity, resulting in rapid aging of the finished products.

In addition, rubbing animal fiber in dry rubber on hot rollers with a temperature of 80 ° C and curing the finished mixture with animal fiber in hot presses from temperatures 110-120 affects the fiber in a destructive way, resulting in the quality of the finished products obtained by this method happens low.

In order to eliminate the defects listed above, in accordance with the present invention, it is proposed to him that before entering the animal fiber rubber, rubber be treated with naphthalene and pine, dissolved in xylene or other organic solvents for one part of rubber 2-3 parts of solvent.

Example. Take 100 weight. rubber, 200 wt. including gasoline, 6 wt. h naphthalene, 7 wt. including pine resin, 14 wt. including oil bitumen, 120 wt. h kojslokna, 10 wt. h. sulfur, 2weight. including accelerator vulcanization and 6 wt. including zinc oxide.

The rubber is immersed in gasoline, then naphthalene solution and pine resin are added. After the rubber absorbs all of it, it is introduced into it on plasticizing rollers, without feeding hot steam into the rolls, oil bitumen, then leather and sulfur with vulcanization accelerators. From the resulting plastic mass, the desired thickness of the plate is made, which are first dried at a temperature of 30-35 °, then compacted by means of a press and finally dried at a temperature of 70-75 °, followed by compaction: with a hydraulic press at a specific pressure within 25-Vocg / cm.

The treatment of rubber with naphthalene and pine resin in organic solvents is intended to make –– STRONGLY swell the very core of the rubber molecule, in order to impart to rubber its ability to absorb fibrous filler in a short time and without heating the rolling, so as not to expose the latter to the destructive effect of high temperature, but mainly the way to keep when rolling their valuable properties.

Prior to introduction into the processed rubber of animal fiber, known plasticizers — bitumen, harpius, etc. — are previously introduced into the swollen rubber.

As a result of this preparation of rubber, the latter, without losing its valuable properties, acquires the ability to absorb fiber fiber in a short time when it is introduced by means of cold rollers and then turn into a plastic fiber mass for soles.

After introducing the fibrous filler into the rubber, sulfur and lead oxide are added to the resulting mass.

The proposed method allows the replacement of a significant proportion of natural rubber synthetic.

The subject matter of the invention.

A method of making artificial leather from a rubber mixture with a fibrous filler, obtained on rollers, characterized in that the constituent parts of the mixture, such as softeners, leather and vulcanization ingredients, are introduced on rubber rollers, pretreated 2-3- a multiple of the pine resin and naphthalene solution in an organic solvent, after which the plastic mixture thus obtained is rolled into plates, dried and compacted in the usual way.