WERKWIJZE EN INRICHTING VOOR HET EXTRUDEREN VAN POLYMEREN.

摘要

Integrated system for the extrusion of an end product from thermoplastic synthetic polymers taken directly from a polymerization reactor. The polymers withdrawn from the reactor are extruded through a die orifice to provide a tube which is inflated by a gas, usually air, introduced therein. Gaseous monomer contained in the polymers and evaporatingly released from the interior wall of the tube becomes intermixed with the inflating gas, and is withdrawn intermittently or continuously in response to measured changes in the diameter of the tube. Evacuation of monomer-containing gas prevents accumulation of the monomer to potentially explosive levels. The rates at which gas is introduced into or withdrawn from the tube are regulated to maintain changes in the lay-flat width of tube within acceptable limits in response to the tube width being sensed by a sensing arrangement.