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US 2014/0272228 A1Published application
Biodegradable pvc film for pharmaceutical packaging and process for its preparation
AssigneeBilcare Limited
InventorsWilheim Morr KLAUS, Pifferi MARCO, Ajith Sashidharan NAIR, Praful NAIK
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Abstract
A process for preparing a bio-degradable PVC based pharmaceutical grade thermo-formable film. The film is stable in aerobic conditions and is bio-degradable under anaerobic conditions. The bio-degradable PVC based pharmaceutical grade film has application in the blister packing of pharmaceutical formulations.
Claims15
A process for preparing a bio-degradable PVC based pharmaceutical grade thermo-formable film, said process comprising the following steps:
- a. mixing pharmaceutical grade PVC resin, copolymer, at least one impact modifier, bio pro-degradent, at least one processing aid, and at least one stabilizer in a mixer to obtain a mixed batch of ingredients;
- b. extruding the mixed batch of ingredients in an extruder at a screw speed ranging between 2 rpm and 15 rpm and temperature ranging between 55° C. and 70° C. to obtain fluxed polymeric flakes;
- and
- c. calendering the polymeric flakes by subjecting them to at least two calender rolls maintained at temperatures ranging between 100° C. and 250° C. to obtain a bio-degradable PVC based pharmaceutical grade thermo-formable film,
- wherein, said film is stable in aerobic conditions and is bio-degradable under anaerobic conditions.
2 more elements
Dependencies are inferred from the claim text.