POLYESTER RESIN-MADE HEAT-RESISTANT PACKAGING CONTAINER

摘要

PROBLEM TO BE SOLVED: To maintain the level of a ground-contact side after heating by forming a bottom surface expecting the deformation caused by the heating of the ground-contact side of the container bottom surface and the load of the content. SOLUTION: An oriented blow-molded heat-resistant packaging container is formed of a polyester resin. A top part 8 of a bottom surface 7 is formed thick so as to be resistant against heat deformation. The thickness of a circumferential wall 9 of the bottom surface is successively reduced from the top part 8 to an arc-shaped contact side 6 around the bottom surface. A part from the inner side of the contact side 6 to an outer circumferential wall 5 of a bottom part is oriented molded to be heat-resistant in a thin-walled manner similar to a body part 4. The inner side of the ground-contact side 6 over the circumferential wall 9 of the bottom surface is formed an upwardly inclined surface 6a of the specified angle expecting the swelling deformation of the ground-contact sidle 6 caused by the heating and the load.