Article of polyethylene terephthalate resin
AssigneeYoshino Kogyosho Co., Ltd.
InventorsHideo Kushida, Takeshi Itakura
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Abstract
An article of polyethylene terephthalate resin, particularly a laminated wall structure of a bottle made by biaxial orientation blow molding from the resin. The laminated wall is made up of polyethylene terephthalate resin and a synthetic resin material having good gas barrier properties.
Claims10
A multilayer biaxially oriented synthetic resin bottle comprised of distinct layers produced by blow molding a parison comprised of a main layer of polyethylene terephthalate rein and a barrier layer of a synthetic resin material which is substantially impermeable to oxygen, said barrier layer having a thickness t.sub.3 and being laminated to the outside of said main layer, a ratio of said barrier layer thickness t.sub.3 to a thickness of the entire wall being approximately equal to T.sub.v, calculated according to the equation:
- ##EQU3## where F is a ratio of the gas barrier ratio of the entire wall to that of a similarly-dimensioned wall of polyethylene terephthalate along;
- and A is a gas permeability of said barrier layer divided by that of polyethylene terephthalate.
Dependencies are inferred from the claim text.