B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
190/26, 18/514
B65D 1/40 (2006.01) B29D 23/03 (1980.01)
Patent
CA 1167215
- 1 - Abstract: The invention relates to a multi-ply vessel which comprises an inner layer composed of a thermoplastic polyester resin, a middle layer composed of a metaxyly- lene group-containing polyamide resin and an outer layer composed of a moisture impermeable synthetic resin. The inner layer and middle layer are orientated in at least one direction at the thin parts of the vessel wall. This vessel can be produced by orientating a parison having the above-mentioned multi-ply structure at a draw ratio of 1 to 4 times in the longitudinal direction and of 2 to 7 times in the crosswise direction at a temperature of from Tg + 15°C to 2(Tg) + 15°C (wherein Tg is a glass transi- tion temperature of the thermoplastic polyester resin). The resulting vessel has high transparency as well as good chemical resistance, impact resistance and the like because a thermoplastic polyester resin is used as the inner layer, and also has good gas barrier properties against oxygen because a metaxylylene group-containing polyamide resin is used as the middle layer.
371225
Hama Yoshihisa
Okudaira Tadashi
Sugihara Shigeharu
Tsuboi Akio
Kirby Eades Gale Baker
Toyo Boseki Kabushiki Kaisha
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