The chemical product packaging film of the present invention is a chemical product packaging film comprising a polyvinyl alcohol resin, a plasticizer, and water-soluble starch, the water-soluble starch having solubility in which the water-soluble starch dissolves when stirred in water having a concentration of the starch of 10% by mass at a temperature of 50 C. for 30 minutes, a content of the water-soluble starch being 4% by mass or less.

The chemical product packaging film of the present invention is a chemical product packaging film comprising a polyvinyl alcohol resin, a plasticizer, and water-soluble starch, the water-soluble starch having solubility in which the water-soluble starch dissolves when stirred in water having a concentration of 10% by mass at a temperature of 50 C. for 30 minutes, a content of the water-soluble starch being 4% by mass or less.

The present invention relates to a biobased barrier film for a paper or paperboard-based packaging material, said barrier film comprising: a substrate layer and a coating layer disposed on at least one surface of the substrate layer, wherein said substrate layer has a grammage in the range of 1-60 g/m.sup.2 and comprises at least 50 wt % of highly refined cellulose pulp based on the dry weight of the substrate layer, and wherein said coating layer has a grammage in the range of 1-15 g/m.sup.2 and comprises at least 50 wt % of a film forming modified starch and 0.1-10 wt % of a biobased lubricant, based on the dry weight of the coating layer.

A dual-surface treated composite superabsorbent particle comprising a polycarboxylate polymer (e.g., saponified polyacrylamide) and a carboxylated starch polymer is disclosed. The surface of the particle is cross linked through esterification with a C.sub.2-C.sub.4 polyol exemplified with glycerol. In addition, the surface region is crosslinked through ionic bonds with a trivalent metal ion exemplified with aluminum. In a critical method of making, the acidification of the surface with the polyol occurs prior to treatment with the trivalent metal ion, which results is a hybrid particle that can include up to about 40% of carboxymethyl starch yet exhibit a FSC of at least 47 g/g, a CRC of at least 27 g/g, an AUL of at least 18 g/g under a load of 0.7 psi, and a SFR of at least 180 ml/min. Also disclosed is a method of making that includes a surface esterification prior to aluminum treatment.