Process for chemically treating papermaking belts
AssigneeThe Procter & Gamble Company
InventorPaul D. Trokhan
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Abstract
A process for improving the life of papermaking belts containing a cured photosensitive polymeric resin is disclosed. The process includes the continuous application of an effective amount of chemical compounds capable of slowing down the degradation rate of the photosensitive polymeric resin to the belt's surface during the papermaking operation. Preferably, the chemical compounds are antioxidants which inhibit or retard oxidation of the cured resin and its ensuing degradative effects.
Claims12
A process for extending the life of papermaking belts containing a solid polymeric resin which has been rendered solid by exposing a liquid photosensitive resin to light of an activating wavelength, which process comprises the steps of:
- a) providing a papermaking belt, said papermaking belt containing a solid polymeric resin which has been rendered solid by exposing a liquid photosensitive resin to light of an activating wavelength;
- and
- b) continuously applying a release emulsion comprising water, oil, surfactant, and an effective amount of an antioxidant chemical compound capable of inhibiting or retarding the oxidation rate of said solid polymeric resin to the papermaking belt, said release emulsion being continuously applied to the papermaking belt while the belt is being used in a papermaking machine, at a point where the belt is not in contact with a paper web, wherein said antioxidant chemical compound is selected from the group consisting of hindered phenols, secondary amines, and mixtures thereof, and wherein said antioxidant chemical is dissolved in the oil phase of the release emulsion.
Dependencies are inferred from the claim text.