Process for producing packing material particles

Abstract From the Canadian patent

In the case of a process for producing pourable spherical-segment-shaped packing material particles made of a plastic material which have an external convex and an internal concave surface the, plastic material is fed in by means of a feeding funnel through an opening in a bush surrounding the extrusion screw. The plastic material is plasticized and, because of the difference in speed existing of the cross section of the mass, comes out of an opening in the die with a bent surface. The extruded plastic material is cut offdirectly at the opening of the die and before any considerable expansion has taken place. In this case the plastic material is pulled into a, space between the extrusion …