B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 41/24 (2006.01) B29C 39/14 (2006.01) B29C 55/06 (2006.01) B29D 7/01 (2006.01) C08J 5/18 (2006.01)
Patent
CA 2295042
Aromatic polycarbonate films having excellent transparency, surface flatness and slidability and suitable for the optical use can be produced by overcoming defects such as scratches, wrinkles and flaws in the steps of producing and processing optical aromatic polycarbonate films by specifying the quality of the roughness on both surfaces thereof and specifying the drying conditions in the drying step after the casting from an aromatic polycarbonate solution in the cast film formation process.
La présente invention concerne des films de polycarbonate aromatique dotés d'excellentes qualités de transparence, de planéité superficielle et de glissement et convenant à l'usage optique. On peut produire et traiter ces films de polycarbonate aromatique, qui sont dépourvus de défauts tels qu'éraflures, rides et fissures, en spécifiant la qualité de rugosité de leurs deux faces et en spécifiant les conditions dans lesquelles s'effectue l'étape de séchage qui suit le coulage d'une solution de polycarbonate aromatique lors du processus de formation des films coulés.
Hosoi Masahiro
Nagoshi Tamiaki
Borden Ladner Gervais Llp
Teijin Chemicals Ltd.
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