| abstract |
The invention provides a water-soluble packaging film, which can maintain a moderate softness without packaging appearance change or odor for a long time, and can package pharmaceuticals, which can greatly shorten the dissolution time in water and achieve excellent water-solubility, Visual recognition and chemical resistance.nn n n The water-soluble packaging film of the present invention contains polyvinyl alcohol, a plasticizer, and an alkali metal, and contains 3 to 15 parts by weight of the plasticizer with respect to 100 parts by weight of the polyvinyl alcohol, and 100% by weight of the water-soluble packaging film. % By weight, containing 0.3 to 5% by weight of the above-mentioned alkali metals. |