Method for controlling a hydrogel composition during processing

Details Method for controlling a hydrogel composition during processing Method for controlling a hydrogel composition during processing

2005-11-29

2008-12-30

Kugel, Timothy J. (Department: 1796)

Colloid systems and wetting agents; subcombinations thereof; pro

Continuous or semicontinuous solid phase

The solid phase contains organic material

C516S098000, C516S099000, C516S924000, C516S926000

Reexamination Certificate

active

07470726

ABSTRACT:
A method for transiently and controllably enhancing the adhesion of a hydrogel composition to select substrates for facilitating the handling of the hydrogel composition during processing, includes the steps of placing the hydrogel composition in a liquid state onto a plastic film facestock, which has biaxially-oriented polypropylene, microporous cellulose acetate or a combination thereof, for temporarily adhering the hydrogel composition to the sheets of the roll stock during processing of the hydrogel composition, and then removing the hydrogel composition from the sheets of the roll stock, after processing of the hydrogel composition is complete, without any adverse affect on the textural qualities of the hydrogel composition.

REFERENCES:
patent: 4674511 (1987-06-01), Cartmell
patent: 4879072 (1989-11-01), Bourset et al.
patent: 6156231 (2000-12-01), McKedy

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