| 摘要 |
<p>A mufti-layer package structure useful for vapor phase transfer in an ambient atmosphere, wherein said package protects sensitive contents placed therein such as a desiccant, deodorizer or perfumer by containing the product between a vapor impermeable backing layer, a vapor permeable flexible layer, and a vapor impermeable cover layer. The two outer layers of the package are impermeable to both the contents of the package and the exterior atmosphere, preventing the diffusion of the contents into the atmosphere and protecting the package contents from the outside atmosphere. Upon opening the package by separating the peelable impermeable front web from the permeable layer or membrane the vapors from the from the contents are now free to move through the permeable web into the atmosphere.</p> |
