| 摘要 |
The present invention provides a water disposable material, characterised in that it comprises a substrate which is readily soluble and/or disintegrated in water, which substrate is coated or otherwise protected from water by a surface layer or coating of a material which is readily soluble and/or disintegrable in water when exposed to pH conditions markedly different to those to which it is exposed during normal use. Preferably, the substrate is a water soluble polyvinylalcohol polymer and the coating is an acrylic polymer which is sensitive to alkali. The material can be used in the fabrication of diapers and other fluid absorbent next-the-skin structures which can be disposed of by disintegration in a toilet to which an alkali has been added to raise the pH of the water in the toilet bowl to a value above that encountered during use upon the person. |
