A - Human Necessities – 61 – L
Patent
A - Human Necessities
61
L
A61L 28/00 (2006.01) A61F 5/445 (2006.01) B32B 27/22 (2006.01)
Patent
CA 2659686
A central aspect of the present invention relates to a film of biodegradable material plasticized with a plasticizer of low vapour pressure, the film comprising on one or both surfaces a coating of glass or metal. Hereby a dilemma is solved: Glass and metal can only be vapour-deposited on polymers that do not contain plasticizers, as the plasticizer evaporates during the vacuum process. By selecting plasticizers with a low vapour pressure, the problems due to evaporation are solved.
La présente invention concerne principalement un film de matière biodégradable plastifié à l'aide d'un plastifiant ayant une pression de vapeur faible, le film comprenant sur une de ses surfaces ou sur les deux un revêtement de verre ou de métal. La difficulté vient du fait que du verre ou du métal ne peut être déposé en phase vapeur sur des polymères que si ceux-ci ne contiennent pas de plastifiants car les plastifiants s'évaporent durant le traitement sous vide. Le choix de plastifiants ayant une pression de vapeur faible permet de résoudre les problèmes dus à l'évaporation.
Coloplast A/s
Ridout & Maybee Llp
LandOfFree
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