B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/514, 190/26.1
B29C 49/00 (2006.01) B65D 1/02 (2006.01)
Patent
CA 1221318
Abstract of the Disclosure Disclosed is a multi-layer drawn polyester bottle comprising a neck portion having an opening on the top end and a fitted or screwed part on the periphery, a bottom portion formed by fusion bonding and closing of a pipe and a barrel portion biaxially molecularly oriented by draw-blowing of the pipe, wherein the pipe is composed of a co-extrudate comprising inner and outer surface base layers of a polyester consisting essentially of ethylene terephthalate units and an intermediate layer of an ethylene-vinyl alcohol copolymer having an ethylene content lower than 50 mole %. This multi layer drawn polyester bottle is prepared according to a process which comprises forming by co-extrusion a multi-layer pipe by using an ethylene- vinyl alcohol copolymer having an ethylene content lower than 50 mole % as an intermediate layer acting as a gas barrier resin layer and a polyester resin as inner and outer base layer and, if necessary, interposing an adhesive layer between the two resin layers, cutting the pipe into a redetermined length, closing one end of the cut pipe by fusion bonding to form a bottom portion, forming the other end of the cut pipe into a neck portion having an opening on the top end and a fitted or screwed part on the periphery, pre-heating the so-obtained preform at a drawing temperature of 85 to 120°C and subjecting the preform to draw-blow-forming biaxially in the axial direction and circumferential direction in a blow-forming mold.
452999
Hirata Shunsaku
Nohara Shigezo
Okubo Yoshimichi
Sakano Kozaburo
Sugimoto Takeshi
Smart & Biggar
Toyo Seikan Kaisha Ltd.
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