摘要:
The invention realizes easy manufacturing of a flat container molded by blow molding, in which the wall thickness of a container wall is made uniform, and which provides improved mechanical strength, heat resistance, etc. and has a good appearance. The flat container obtained by the blow molding of a polyester resin is characterized in that the container has a flatness ratio of not less than 1.3, and in that its body has a wall thickness ratio of a maximum wall thickness to a minimum wall thickness of not more than 1.6, a difference in elongation between a maximally stretched portion and a minimally stretched portion of not more than 150% in a tensile test at 95°C, a crystallinity of not less than 30%, and a difference in TMA non-load change between a maximally stretched portion and a minimally stretched portion of not more than 500 µm at 75°C and 100°C.
摘要:
A flat container produced by the blow molding of a polyester resin, characterized in that it has a flatness ratio of 1.3 or more, and that its body has a thickness ratio of the maximum thickness to the minimum thickness of 1.6 or less, the difference in the elongation in a tensile test at 95˚C between the maximally stretched portion and the minimally stretched portion of 150 % or less, a crystallinity of 30 % or higher, and the difference in the TMA non-load change between the maximally stretched portion and the minimally stretched portion of 500 μm or less at 70˚C and 100˚C. The above flat container produced by the blow molding has a wall having a uniform thickness, is improved in mechanical strength, heat resistance and the like, and has good appearance, and further can be produced with ease and simplicity.