PROCEDIMIENTO PARA LA FABRICACION DE UN CUERPO HUECO,ESPECIALMENTE RECIPIENTE O DEPOSITO,APROPIADO PARA EL ALOJAMIENTO DE SUSTANCIAS DIFUSIBLES,A BASE DE UN MATERIAL SINTETICO DE POLIOLEFINA

摘要

The invention comprises a hollow body, suitable for receiving diffusible substances and made of plastics material coated with varnish resins, the external surface of which has a roughness, measured in profile according to DIN 4768, Part I, of Rz=from 2 to 150 mu m and Rmax=from 5 to 250 mu m on which a coating, positively linked with that surface to provide a seal against diffusion of liquids and gases present in the body, consisting of a chemically crosslinked polyurethane resin is located in a layer thickness of from 10 to 800 mu m.