| 摘要 |
PROBLEM TO BE SOLVED: To provide a cold storage agent container without water leakage when a cold storage agent using water as a main ingredient is accommodated, with excellent thermal conductivity, greater tensile strength, and particularly greater heat seal strength of a junction part. SOLUTION: A laminate film is formed by joining a 20 to 30μm thick first two axis extended polyamide film, a 3 to 10μm thick aluminum foil, a 10 to 30μm second biaxial extended polyamide film, and a 50 to 100μm polyethylene film in this order, and a predetermined size film is cut out from the laminate film. A cold storage agent container is obtained by opposing and superimposing the polyethylene film surface and thermally melting peripheral edges of the polyethylene film with a vacuum sealing and the like. Further, instead of the aluminum foil there may be used a film which is obtained by vacuum depositing aluminum on a resin film such as a polyamide film and a polyethylene film.
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