| 摘要 |
<p>The invention is concerned with a mufti-layer film structure ( 1 ), especially film label-structure having a shrinkability, produced preferably in the coextrusion process, with a first ( 3 ) and a second ( 4 ) outer layer and a third inner layer ( 2 ) between the first ( 3 ) and second ( 4 ) layer, all layers consisting essentially of polystyrene. In order to achieve an advantageous label stock, the invention proposes, that the first ( 3 ) and second ( 4 ) layer are by weight approximately 50-75% of the overall weight of the label-structure, that the overall thickness is in the range of 0.5 to at least 4 mils (0.012 to 0.102 mm) and that the first ( 3 ) and second ( 4 ) layer consist of general, purpose styrenic resin, whereas the third layer ( 2 ) is a modified tough polystyrene, such as "K-resin" of Philipps Petroleum Chemicals.</p> |
