| 摘要 |
PROBLEM TO BE SOLVED: To provide a film formed of polyolefin resin blended with rice bran, having an enhanced antimicrobial effect and an enhanced antioxidative effect, with reduction in strength being suppressed.SOLUTION: A manufacturing method of the film includes: a first step of obtaining resin pellets by kneading a polyolefin resin, rice bran, and cellulose nanofiber under presence of water at the heat-flow temperature of the polyolefin resin while releasing water vapor, and cooling the mixture to the heat-flow temperature or lower; and a second step of extruding the resin pellets under heat-flow conditions and stretching the extruded product to make a thin film. The rice bran for use in the method is preferably a medium bran. Further, the cellulose nanofiber for use is preferably a cellulose nanofiber having hydroxy groups with a part of which being polybasic acid monoesterified. |
