Method for manufacturing a substantially rigid water-dispersible

Details Method for manufacturing a substantially rigid water-dispersible Method for manufacturing a substantially rigid water-dispersible

1990-04-30

1992-05-05

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Utilizing diverse solid particles

1061971, 162147, 2523635, 264118, 264DIG53, B29C 3902

Patent

active

051105250

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.

REFERENCES:
patent: 2771377 (1956-11-01), Greminger
patent: 2965508 (1960-12-01), Windover et al.
patent: 4031179 (1977-06-01), Tatzel et al.
patent: 4508595 (1985-04-01), G.ang.sland
patent: 4888145 (1989-12-01), Allner et al.

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