METHOD FOR RECYCLING A MEMBRANE AND EXTRUDING MACHINE FOR IMPLEMENTING SAID METHOD

摘要

The invention concerns a method for recycling a membrane comprising at least a layer of fibres immersed in a viscous substance, which membrane is split into small pieces which are then introduced into an extruding machine provided with an extruder screw, which pieces are heated and subjected to the motion of the extruder screw to destroy said layer and liquefy the viscous substance, the pieces are first subjected to the motion of the extruder screw provided with a screw pitch greater than that of a second screw pitch of the extruder screw located downstream of the first and at the second screw pitch, the pieces treated in the first part, are subjected to a rotating and translating motion generated by the presence of the second screw pitch which is provided with longitudinal grooves.