POLYGLYCOLIC ACID RESIN-BASED LAYERED SHEET AND METHOD OF PRODUCING THE SAME

摘要

There is provided a laminate sheet which is excellent in oxygen-barrier property and moisture resistance, biodegradable as a whole and therefore suitable as a base material for packaging materials, such as food containers. The laminate sheet is formed by laminating a water-containable and biodegradable polymer substrate sheet or a precursor thereof in a water-containing state with a layer of polyglycolic acid resin having a residual monomer content below 0.5 wt.% to form a laminate, and subjecting the laminate to bonding and forming under heat and pressure.