| 摘要 |
PURPOSE:To obtain a packaging film excellent in strength, usable as a packaging material such as a medium bag or a large bag and also excellent from the aspect of environment by providing a polysaccharide layer based on water- soluble polysaccharide to at least the single surface of a porous base material. CONSTITUTION:It is pref. to form a polysaccharide layer from a composition containing water-soluble polysaccharide and polyhydric alcohol in order to impart flexibility to a film. As a porous base material, paper, a nonwoven fabric, a fabric or a foamable plastic sheet are designated but paper or a nonwoven fabric is pref. from the aspect of the adhesion to the polysaccharide layer and film physical properties. A packaging film is obtained by providing the polysaccharide layer based on water-soluble polysaccharide to at least the single surface of the porous base material. This packaging film has sufficient strength, especially, excellent tear strength. |
