Thermally insulated double-walled synthetic resin container and thermally insulated double-walled synthetic resin lid

摘要

A thermally insulated double-walled synthetic resin container having a thermal insulator layer (5) filled with a low thermal conductivity gas, wherein the inner container (3) and the outer container (2) are formed from a chemical resistant resin, a hole portion (8) is provided at the enter of the bottom wall of the outer container, this hole portion is sealed by a sealing panel (9) formed from chemical resistant resin; a protrusion portion (25) is formed on the thermal insulator layer side of the bottom central portion of the outer container and a depression portion (22) aligned with the center of the protrusion portion (25) is formed on the reverse side of this protrusion portion; or a metallic thin film layer (11) is formed on the surfaces facing the thermal insulator layer aside from the area around the mouth; as a result of which the thermally insulated double-walled synthetic resin container is provided with exceptional thermal insulation capabilities and strength.