Patent ID: 6299007
Filing Date: 2001-10-09
Classification: B65D

Abstract:
A heat-resistant packaging container, in which a body portion is formed to have biaxial orientation by stretch-blow molding of a polyester resin, an outer peripheral wall of a bottom portion is formed to be inwardly curved, and a bottom face is formed to be recessed into the container to have a trapezoidal cross-section, wherein: a top portion of the bottom face is formed to have a large wall thickness to attain a resistance to heat deformation; an inner peripheral wall of the bottom face is formed so that a wall thickness thereof gradually becomes smaller from the top portion to an arc grounding edge; the outer peripheral wall is formed by stretch molding from inside of the grounding edge, so as to have a small wall thickness that is the same as that of the body portion, to attain a heat resistance; and the inside of the grounding edge connecting to the peripheral wall of the bottom face is formed into a tilt surface diagonally oriented upwardly from an outside arc surface at a desired angle in consideration of an amount of expanding deformation of the grounding edge due to heating and loading.