B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/514
B29C 49/22 (2006.01) B05D 7/02 (2006.01) B29C 49/64 (2006.01) B29C 51/14 (2006.01) B65D 1/02 (2006.01) B65D 1/28 (2006.01) B65D 65/42 (2006.01) C08J 7/04 (2006.01)
Patent
CA 1231506
Abstract of the Disclosure Disclosed is a coated oriented plastic vessel formed by subjecting a parison, preform or sheet comprising a molecularly orientable thermoplastic resin substrate and a coating layer of a vinylidene chloride copolymer formed on at least one surface of said substrate to a draw-molding operation such as biaxial draw-blow-molding or draw-forming, wherein the coating layer of the vinylidene chloride copolymer has such a molecular orientation that the sum of two-dimensional orientation coefficients (? + m) in the axial direction and circum- ferential direction is at least 0.03 as measured accord- ing to the polarized light fluorometry and the coating layer is not substantially peeled at the low-temperature burst test conducted at -5°C. This coated oriented plastic vessel is prepared by a process comprising coating an aqueous latex of a vinylidene chloride copolymer on at least one surface of a parison, preform or sheet composed of a molecularly orientable thermo- plastic resin, drying the coated latex to form a coated structure and subjecting the coated structure to a draw- molding operation such as biaxial draw-blow-molding or draw-forming at a temperature higher than the glass transition temperature of the vinylidene chloride copolymer but lower than the melting point of the vinylidene chloride copolymer, at which temperature draw-molding of said thermoplastic resin is possible, to thereby from the coated structure into a shape of a vessel while drawing the coating layer.
429093
Hirata Sadao
Maruhashi Yoshitsugu
Tanikawa Isao
Smart & Biggar
Toyo Seikan Kaisha Ltd.
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