| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat insulating composite container consisting of a paper cup as an outer packaging body and a plastic cup as an inner packaging body and capable of preventing any burnt deposit on any portion of the paper cup, in particular, on a rim of the bottom of the paper cup without any leakage when the content such as beverage and instant food is placed in the plastic cup as the inner packaging body, and heat-cooked in a microwave oven. <P>SOLUTION: The heat insulating composite container has a double structure with the paper cup as an outer packaging body and the plastic cup as an inner packaging body integrated with each other. The paper cup consists of a barrel member and a bottom member. The barrel member mainly constitutes a barrel portion, and its lower end is folded back to form a fold-back portion. The bottom member mainly constitutes a bottom face part, and its outer peripheral edge part is bent downward substantially at right angles to form a bent portion. The bent portion is held by the fold-back portion of the barrel member and a lower end part of the barrel portion, and heat-crimped to form a bottom rim part having the width of an inner portion exceeding 5 mm. The bottom surface part is formed in an outwardly recessed shape, and the distance between an outer face of the lowest end of the bottom face part and a lower end face formed of a lower end of the bottom rim part of the barrel member is set to be ≤5 mm. <P>COPYRIGHT: (C)2007,JPO&INPIT |
