| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a container with outstanding gas barrier properties and free from a local biased wall by reducing polyketone consisting of an alternating copolymer of carbon monoxide and ethylene and heat-molding a film with a polyalcohol resin layer whose melting point and density are specified. SOLUTION: A film or a sheet containing polyalcohol obtained by reducing polyketone composed of an alternating copolymer of carbon monoxide and ethylene, is heat-molded. A polyalcohol resin layer has a melting point of 110-160 deg.C and a density of 1.16-1.19g/cm<3> . The method to obtain a multilayer structure is by coextrusion, coinjection, sand lamination, solution coating, extrusion lamination and dry lamination. In the coextrusion method, the polyalcohol resin is melt-kneaded by an extruder corresponding to each of the resin layers and the melt-kneaded resin is extruded into a specified shape through a multilayered multiple die such as a T-die or a circular die.</p> |
