Reduction of radiation damage to polymers

A - Human Necessities – 61 – J

Patent

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A61J 1/05 (2006.01) A61J 1/10 (2006.01) B32B 27/08 (2006.01) C08J 7/00 (2006.01)

Patent

CA 2512990

A film resistant to degradation caused by sterilising radiation is made. The film is made by minimizing the production of free radicals in the polymer (2 in Figure) during sterilization via the use of inert gas and reactant scavenger (6 and 8 in Figure), both within a sterilizable pouch. The scavengers can be acid adsorbents that react after sterilization. The films retain their physical and mechanical properties during storage and are useful for packaging pharmaceutical, food, semiconductor and medical products.

L'invention porte sur un procédé de production d'un film polymère résistant à la dégradation pendant la stérilisation telle que l'irradiation gamma. Le procédé consiste à minimiser le nombre de radicaux libres formés pendant la stérilisation par l'utilisation d'un gaz inerte et d'un piégeur de réactif dans une poche de stérilisation, les piégeurs de réactif pouvant être des adsorbants acides qui piègent les sous-produits acides formés pendant l'irradiation. Les films conservent leurs propriétés physiques et mécaniques sur un stockage de longue durée. Les films sont notamment amenés à être utilisés comme laminés d'emballage pour les produits pharmaceutiques, les produits alimentaires et les dispositifs médicaux.

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