| 摘要 |
The package comprises a sealed thermoformed plastic (pref. PVC) shell, forming a reservoir for the compsn. and having a distribution face. This face contains perforations and is convex. The face is covered tightly with a film of plastic material, which is impermeable to the vapour from the compsn. and the convexity ensures a tight seal around each distribution hole. The package is much cheaper than present containers and the tight seal ensures no loss of vapour before the container is used. |
