▎ 摘　　要

NOVELTY - Water-soluble film comprises: (a) a first water-soluble polymeric layer having a surface; (b) a second water-soluble polymeric layer having a surface; and (c) a water-dispersible barrier layer disposed between the first and second layers. USE - The film is useful: for consumer product applications e.g. liquid detergent pods and automatic dish washer dry powder tablets; as component film in laminates for flexible package applications i.e. sachets; and to convert into line to print, sheet, slit, rewind and other typical converting operations to make articles pouches. ADVANTAGE - The film: utilizes water-dispersible barrier against any water vapor permeation and is flexible, stretchable and elongated up to 200% without breaking, be opaque, preferably transparent, depending on the materials and also offers several benefits compared to prior-art water-soluble film executions; is free of binder (interstitial materials) in the nanoplatelets layer that maximizes barrier performance of nanoplatelets layer against water permeation whilst maintaining dispersibility in water once top/bottom water-soluble polymeric layers are removed via dissolution in water during use; utilizes water-soluble polymeric layers is immersed in water (i.e. in applications where film is required to disappear in water), surrounding and supporting the nanoplatelets barrier layer dissolve in water, breaks up, the nanoplatelets disperse in water, thus enabling entire film to disappear in water; may contain residual moisture depending on hygroscopy of film components and isotherm may contain 4-8% residual moisture at 23 degrees C and 50% r.H; and utilizes nanoplatelets it is desirable free from defects i.e. cracks and holes lowering barrier performance and are easily exfoliated in water, both for application purpose (e.g. wet coating) and end-of-life scenarios (e.g. wastewater treatment plants), but highly cohesive when dried, used in the industry as rheological modifier, flame retardant, anticorrosion coating and/or chemical barrier and are obtained from natural sources.