Method for manufacturing a substantially rigid water-dispersible article
US5110525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1990 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Apr 30, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/53
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for manufacturing a substantially rigid water-dispersible article includes the step of mixing together an ionic water-soluble film-forming polymer, a non-ionic water-soluble film-forming polymer, a chemically purified finely divided highly bleached cellulose, and glass fiber wool. Water is added to the dry mixture to form a dough which is subsequently molded into the desired form and dried while being maintained in the molded form. A filler or extender such as talc or paper pulp may be added prior to the molding step. In addition, a wetting agent may be added to accelerate rewetting and dispersal of the article upon disposal thereof, while a hydrophobic composition may be added to the dough to form a water repellant surface layer or film during drying of the molded article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.