| 摘要 |
<p>The thermally insulating bag is made by thermo-sealing a gas or a liquid which freezes at a temperature below 0 deg.C between a plastics (14) and a slightly smaller, metal sheet before folding the sandwich into a pocket. The double skinned pocket so formed is such that the base fold (18) is insulated. After inserting a product in the pocket the top is folded over to close the bag.</p> |
