METHOD OF RECEIVING PROTECTIVE MATERIAL FOR MANUFACTURING WATERTIGHT DIAPHRAGMS, PROTECTING SOIL Russian patent published in 2008 - IPC D04H1/46 

FIELD: textile; paper; process.

SUBSTANCE: method provides forming of composition nonwoven material with surface layer, underlayer and wireframe interlayer made of polymer material, at that received structure is passed through shafting. In the course of protective material receiving surface layer and underlayer form with surface density 200-400 g/m², at that thickness of wireframe interlayer is 100-250 micron. Layers binding is implemented by means of passing through tightly pressured shafting, at that ratio of shafts diameters is 1:[6-8], big shaft is heated till temperature 180-250°C, and its rotational velocity is 1.2-4 rpm. Finished nonwoven material is enrolled and held at temperature 18-24°C during at least three days.

EFFECT: improvement of material physical properties; reduction of ecological stress to environment and reduction of material and technical consumption at its recovery.

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