GLASS BOTTLE COATED WITH FILM AND PROCESS FOR COATING GLASS BOTTLE WITH FILM

摘要

PURPOSE:To prevent generation of stress crack when stretched film consisting essentially of styrene/butadiene block copolymer is applied to a glass bottle and shrinked by heating the film to cover the bottle, wherein the index of double refraction of the film is regulated to above a specified value. CONSTITUTION:Stretched film is prepd. by stretching resin contg. =50wt% styrene/butadiene block copolymer uniazially by transverse uniaxial stretching method using tenter, or inflation method. When a glass bottle is coated by shrinking the stretched film by heating, the index of double refraction of the film after heat shrinkage is regulated to =1X10-4.