C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/02 (2006.01) A61J 9/00 (2006.01) B29C 49/00 (2006.01)
Patent
CA 2705870
The invention is generally directed to baby bottles and other articles produced by blow molding from polymeric materials having glass transition temperatures ranging from 100°C to 130°C, as well as to processes for producing them. These articles can be exposed to boiling water and can be produced by using a suitable combination of a stretch ratio of less than 3 and a preform temperature at least 20°C greater than the glass transition temperature (Tg) of the polymeric material.
L'invention porte d'une manière générale sur des biberons et autres articles obtenus par moulage par extrusion-soufflage de matériaux polymères ayant des températures de transition vitreuse se situant dans la plage de 100°C à 130°C, ainsi que sur des procédés permettant de les fabriquer. Ces articles peuvent être exposés à une eau bouillante et peuvent être obtenus à l'aide d'une combinaison appropriée d'un rapport d'étirage de moins de 3 et d'une température de préforme d'au moins 20°C de plus que la température de transition vitreuse (Tg) du matériau polymère.
Gilliam Spencer Allen
Pecorini Thomas Joseph
Phillips Alan Keith
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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