To provide a multilayered film or sheet having a polyglycolic acid layer as a core layer and hard to generate whitening in the polyglycolic acid layer being the core layer by heating sterilization such as boiling sterilization or the like, and a packaging container obtained by the secondary molding of the multilayered film or sheet.
The multilayered film or sheet has a layered constitution wherein other thermoplastic resin layers are arranged on both surfaces of the core layer comprising a stretched polyglycolic acid film at least by on layer and, if necessary, adhesive resin layers are arranged between the respective layers. When this multilayered film or sheet is boiled under a 90°C/30 min condition, the haze value (H2) after the boil treatment of the stretched polyglycolic acid film being the core layer is not more than 3.0% and the ratio (H2/H1) of the haze value (H2) after boil treatment of the stretched polyglycolic acid film to the haze value (H1) before boil treatment is not more than 3.0.
YAMANE KAZUYUKI
WAKAMATSU AKIKO
MIURA HIROMITSU
| JPH1080990A | 1998-03-31 | |||
| JP2001329056A | 2001-11-27 | |||
| JP2001049097A | 2001-02-20 |
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