Emballagelegeme

摘要

The present invention relates to a method for manufacturing a packaging material formed of a multilayer body having at least a base layer and a thermal adhesive layer, the thermal adhesive layer being laminated as the outermost layer on one side of the packaging material, and hydrophobic oxide fine particles having an average primary particle diameter of 3 to 100 nm being attached to the outside surface where the thermal adhesive layer does not adjoin another layer, wherein the hydrophobic oxide fine particles form a porous layer having a three-dimensional network structure, and wherein the hydrophobic oxide fine particles can contact with a content, the method comprising a step of causing the hydrophobic oxide fine particles to attach to the surface of the thermal adhesive layer, the step being carried out by forming a coat on the thermal adhesive layer using a dispersion of the hydrophobic oxide fine particles dispersed in a solvent and drying the coat.