CONTAINER MADE OF STYRENIC RESIN FOAMED SHEET HAVING MOUTH PART SUBJECTED TO CURL PROCESSING AND PRODUCTION THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a palatable safe container made of a styrenic resin foamed sheet while ensuring the seal area of a seal lid by bending an opening flange by using a conventional curl device to apply curl processing thereto. SOLUTION: A styrenic resin foamed sheet is molded under heating to form a container main body 11 and an opening flange 14 having a part extending in parallel to the bottom surface of the container main body to the outer periphery of the opening part 12 of the container main body and the opening flange is subjected to curl processing to form a container 10 having mouth part 23 formed thereto. A flat seal surface 25 having a width of at least 2mm is formed to the upper surface of the mouth part 23.