B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 9/12 (2006.01) B29B 9/16 (2006.01) B29B 17/00 (2006.01) C08J 3/12 (2006.01) C08J 11/06 (2006.01)
Patent
CA 2595008
Compartmentalized chips of at least two chemically similar crystallizable thermoplastic polymers each having a different intrinsic viscosity placed in separate zones are disclosed. These compartmentalized chips exhibit thermal and rheological characteristics that are different from the traditional technique of homogeneously combining the two materials into the chip. These compartmentalized chips in their amorphous, crystalline and solid phase polymerized forms exhibit a longer crystallization half time than the homogeneous mixture, thus permitting faster injection cycle times for an equivalent homogenous mixtures.
La présente invention concerne des puces compartimentées comprenant au moins deux polymères thermoplastiques cristallisables chimiquement similaires ayant chacun une viscosité intrinsèque différente qui sont placés dans des zones séparées. Ces puces compartimentées présentent des caractéristiques thermique et rhéologique qui diffèrent de la technique classique de mélange homogène de deux matériaux dans la puce. Ces puces compartimentées dans leurs formes polymérisées en phase solide, amorphe et cristalline présentent une demi-vie de cristallisation plus longue que le mélange homogène, ce qui permet ainsi d'avoir des temps de cycles d'injection plus rapides pour des mélanges homogènes équivalents.
Ferrari Gianluca
Gastaldo Dan
Massey Freddie L.
Richardson Delane N.
Sisson Edwin A.
M. & G. Polimeri Italia S.p.a.
Macrae & Co.
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