PROCESS FOR PRODUCING LIQUID-CONTAINER MATERIAL

摘要

A process for producing a liquid-container material comprising a first thermoadhesive resin film layer, a substrate sheet having a thin-film layer of an inorganic compound, and a paper substrate, comprises the steps of; (a) melt-extruding a thermoadhesive resin from an extruder die to form a first thermoadhesive resin film; (b) cooling said first thermoadhesive resin film obtained in step (a), to a temperature at which the thermoadhesive properties inherent in said film can be retained and at which no crack is produced in the thinfilm layer of an inorganic compound when said film is laminated to the substrate sheet having the thin-film layer of an inorganic compound; (c) laminating said first thermoadhesive resin film obtained in step (b), to said substrate sheet having the thin-film layer of an inorganic compound to form a laminate; and (d) laminating said laminate obtained in step (c), to said paper substrate. The first thermoadhesive resin film may preferably be comprised of a non-adsorptive resin layer and a thermoadhesive resin layer. In this instance, the non-adsorptive resin layer is so provided as to be on the outside.