C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/02 (2006.01) C08J 5/18 (2006.01) C08K 5/15 (2006.01)
Patent
CA 2177620
This invention relates to polyester/plasticizer blends which are useful as heat-shrinkable films or sheet in low temperature shrink packaging applications. The plasticizer is injected into the melt of the polyester. The plasticizer lowers the glass transition temperature, on set temperature and shrink rate of the polyester. Film or sheet produced by the polyester/plasticizer blends is clear.
L'invention a pour objet des alliages polyester/plastifiant utilisés sous forme de films ou de feuilles thermorétractables dans les applications d'emballages rétractables à basse température. Le plastifiant, qui est injecté dans le polyester en fusion, abaisse la température de transition vitreuse ainsi que la température du matériau mesurée lors d'un rétrécissement de 2 % et réduit le rétrécissement du polyester. Les films ou les feuilles produits à partir de ces alliages polyester/plastifiant sont transparents.
Light Ronald Richard
Shih Wayne Keng
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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