| 摘要 |
A container comprises a substantially dimensionally stable outer wall and an easily deformable inner pouch which gradually contracts upon discharge of the contents of the container. As a result, pressure compensation is provided in the increasing space between the outer wall and the inner pouch. The outer wall and the inner pouch have, therebetween, a layer of a pressure compensating material that expands when acted upon by an agent. The expanding layer comprises, in an exemplary embodiment, citric acid and sodium bicarbonate foam acting against the inner pouch. The foamed pressure-compensating layer supports the inner pouch so that no vacuum is generated in the pouch. |
