C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 7/14 (2006.01) B29C 49/00 (2006.01) B29C 49/64 (2006.01) C08G 63/20 (2006.01) C08G 63/80 (2006.01) B29C 49/06 (2006.01)
Patent
CA 2240837
Treatment for the dimensional stabilization of containers in PET or COPET obtained by injection-blow molding consisting in subjecting to heat treatment during the blowing phase, preforms obtained from PET or COPET upgraded in the solid state in the presence of small quantities (0.01-0.2 % by weight) of a dianhydride of an aromatic tetracarboxylic acid, preferably pyromellitic dianhydride.
Un traitement de stabilisation dimensionnelle de récipients en PET ou en COPET produits par moulage par injection-soufflage consiste à soumettre à un traitement thermique pendant la phase de soufflage des préformes en PET ou COPET améliorées à l'état solide en présence de faibles quantités (0,01-0,2 % en poids) d'un dianhydride d'un acide tétracarboxylique aromatique, et préférablement d'un dianhydride pyromellitique.
Macrae & Co.
Sinco Ricerche S.p.a.
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