Patent ID: 6582787
Filing Date: 2003-06-24
Classification: B29C,B29L,B32B,B65D,Y10T

Abstract:
A blow molded container for photoresist liquid, the container having light-shielding properties in the ultraviolet light region while permitting some transmission of light rays in the visible light region, comprising an inner layer, an intermediate layer, and an external layer, wherein(1) the inner layer is a resin comprising at least one olefinic polymer selected from polymers of ethylene, propylene, butene-1, 4-methyl-pentene-1, hexene-1 or octene-1 and copolymers of ethylene and olefins other than ethylene; (2) the intermediate layer is a solvent-barrier resin comprising at least one member selected from the group consisting of polyamides, polyvinyl alcohol, copolymers of ethylene and vinyl alcohol, polyesters and polyphenylene oxides; (3) the external layer is a resin composition containing a light-shielding substance; (4) the lowest absorbance of the container is more than 2.0 determined at a wavelength of not more than 400 nm by spectrophotometer; and (5) the absorbance of the container is not more than 1.62 determined at a wavelength of 600 nm by spectrophotometer.