Method for producing ready-to-use soft PVC films or profiles
AssigneeSika Technology AG
InventorsUlrich Wolf, Fabian Frei
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Abstract
The extrusion of polymer compositions based on polyvinyl chloride (PVC) and in particular to a method in which polymer compositions are produced that have an elongation at break of at least 200%, a tensile strength of at least 10 N/mm2 with a specific energy input SEI of 0.03 to 0.20 kWh/kg and in particular 0.04 to 0.16 kWh/kg. The method is expediently carried out such that a plasticizer is added in a plurality of portions to the non-composed polyvinyl chloride and mixed into said polyvinyl chloride. The method thereby offers a fast and simple possibility of producing products from finished soft PVC, the production of said products requiring only a single processing device in the form of an extruder.
Claims16
A method for extruding a homogeneous polymer composition, which has a degree of gelation of 60% to 100%, an elongation at break of at least 200%, and a tensile strength of at least 10 N/mm2, from an uncompounded polyvinyl chloride, wherein the quantity of energy introduced into the polymer composition within the method, as indicated by the specific energy input (SEI), is 0.03 to 0.20 kWh/kg.
Dependencies are inferred from the claim text.