B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/10 (2006.01)
Patent
CA 2621776
Compounding or extrusion rates can be increased by splitting the polymer solid feed. Melting of additional solid polymer is significantly assisted by excess enthalpy from incoming melt from a primary mixing stage. Depending on resin rheology and melting characteristics, rate increases were achieved of from up to about 55 to about 100% rate increase over the use of a single feed at the same rotor speed. The net result is a decrease in the overall SEI (specific energy input to the polymer) and thus melt temperatures.
La présente invention se rapporte à un procédé dans lequel les vitesses de composition ou d~extrusion peuvent être augmentées en divisant l~alimentation solide du polymère. Le procédé de fonte d~un polymère solide supplémentaire est significativement assisté par l~enthalpie en excès en provenance de la fonte provenant d~une étape de mélange primaire. En fonction de la rhéologie de la résine et des caractéristiques de fonte, des augmentations de vitesse ont été atteintes d~environ 55 à environ 100 % pendant l~utilisation d~une seule alimentation avec la même vitesse de rotor. Le résultat net est une diminution du SEI global (SEI - specific energy input : envoi d~énergie spécifique) vers le polymère et donc des températures de fonte.
Esseghir Mohamed
Kharazi Alex
Neubauer Anthony C.
Quaranta Albert A.
Smart & Biggar
Union Carbide Chemicals & Plastics Technology Corporation
Union Carbide Chemicals & Plastics Technology Llc
LandOfFree
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