| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polystyrenic multi-layered structure excellent in an oil resistance and in recycling performance, and a package using the same. <P>SOLUTION: The multi-layered structure 10 comprises, a surface layer 1 made of a polyolefinic resin formed through a middle layer 2 on a substrate layer 3 of a polystyrenic resin, while the middle layer 2 comprises a compatibilizer, comprised of a block copolymer of an aromatic vinyl compound and a conjugated diene comprising a polystyrenic resin of 25-75 wt.%, a polyolefinic resin of 75-25 wt.%, having a bonded aromatic vinyl content of 30-80 wt.% and a double bond resulted from the conjugated diene of≥35% saturated by hydrogen, of 1-20 pts.wt. per 100 pts.wt. of the total of the polystyrenic resin and the polyolefinic resin. The substrate layer 3 may be formed of the polystyrenic resin and the polyolefinic resin. The multilayered structure 10 is superior in an oil resistivity and recycling performance, and is suitable to use as a packaging material for foodstuffs or medicines and a container 20 and a lid 30. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
