Method for manufacturing free flow packing materials of low bulk density

Abstract

Abstract A METHOD FOR THE MANUFACTURE OF FREE-FLOW PACKING MATERIALS IN THE FORM OF RELATIVELY STIFF CRUSHABLE CYLINDERS OF FOAMED EXPANDED PLASTIC INVOLVING THE HEATING AND EXTRUDING OF THE PLASTIC TO FORM HOLLOW CYLINDRICAL TUBES OF FOAMED PLASTIC SIMULTANEOUSLY WITH PULLING ON THE EXTRUDED TUBES TO ELONGATE THE SAME AND TO LONGITUDINALLY ORIENT THE VOID SPACES AND GAS POCKETS IN THE WALLS OF THE TUBE, CUTTING THE EXTRUDED ELONGATED TUBES TO FORM INDIVIDUAL CYLINDERS, AND THEREAFTER HEATING AND GRADUALLY EXPANDING THE INDIVIDUAL CYLINDRICAL UNITS TO ACHIEVE A SUBSTANTIALLY GREATER EXPANSION OF THE TUBE WALLS IN A RADIAL DIRECTION THAN IN A LONGITUDINAL DIRECTION, AS RESPECTS THE AXIS OF THE CYLINDERS. THE EXPANSION MAY BE CARRIED OUT IN SUCCESSIVE STAGES.

Inventors

• 👤 Alexander G Makowski

Bibliographic Details