US 9,868,574 B2 · Water-soluble packaging film

Abstract

The present invention provides a water-soluble packaging film which is capable of packaging chemicals while maintaining appropriate flexibility without changes in the appearance or offensive odors over a long period of time, which takes much less time to dissolve in water, and which can achieve excellent water solubility, excellent visibility, and excellent chemical resistance. The present invention relates to a water-soluble packaging film containing: polyvinyl alcohol; a plasticizer; and an alkali metal, the water-soluble packaging film containing 3 to 15 parts by weight of the plasticizer based on 100 parts by weight of the polyvinyl alcohol, the water-soluble packaging film containing 0.3 to 5% by weight of the alkali metal based on 100% by weight of the water-soluble packaging film.

Claims6

Dependent claims

A water-soluble packaging film comprising:

polyvinyl alcohol;
a plasticizer;
and
an alkali metal,
wherein the water-soluble packaging film contains 3 to 15 parts by weight of the plasticizer based on 100 parts by weight of the polyvinyl alcohol,
wherein the water-soluble packaging film contains 0.3 to 5% by weight of the alkali metal and 83.8 to 97% by weight of the polyvinyl alcohol based on 100% by weight of the water-soluble packaging film,
wherein the polyvinyl alcohol has a saponification degree of 80.0 to 99.9 mol %, and
wherein a content of the alkali metal per unit area is 0.06 to 10 g/m2.

5 more elements

Dependencies are inferred from the claim text.

Water-soluble packaging film

Life of this patent

Water-soluble packaging film

Life of this patent

Abstract

Claims6