| 摘要 |
<p>The film comprises an inner thickness of polyvinyl chloride (PVC) with polymer plasticizers, coextruded with two thin outer layers of synthetic resins of ethylene-vinylacetate (EVA) or stretchable polystyrene (PS) or other thermoplastic materials which are non-toxic and capable of preventing the transmission of particles present in the PVC.</p> |
