| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multi-layer injection stretch blown container which is free from formation of drawing irregularities during a drawing blow process in a conventional technique for fabricating a multi-layer preform comprising a polypropylene resin layer and a barrier resin layer, and has superior heat resistance and barrier properties. <P>SOLUTION: The injection stretch blown container is a multi-layer container composed of at least two kinds and three or more of layers including an intermediate layer made of a barrier resin, and a layer which is in contact with the intermediate layer and is made of a propylene resin composition. The propylene resin composition comprises a propylene polymer of 50-98 wt.% which shows an MFR<SB>pp</SB>(melt flow rate<SB>polypropylene</SB>) of 0.5-200 g/10 min, contains a comonomer-derived constitutional unit of 0-10 mol%, and has a molecular weight distribution (Mw/Mn) of 1.5-8, and a modified propylene polymer of 2-50 wt.% which shows a MFR<SB>cmp</SB>(melt flow rate<SB>cytidine monophosphate</SB>) of 10-500 g/10 min and MFR<SB>cmp</SB>/MFR<SB>PP</SB>of 1 or larger, and contains constitutional units derived from an unsaturated carboxylic acid and a derivative therefrom at 0.1 wt.% or more. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
