Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Patent
1990-04-12
1991-10-22
Fisher, Richard V.
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
D21F 100
Patent
active
050592831
ABSTRACT:
A process for improving the life of papermaking belts containing a cured photosensitive polymeric resin is disclosed. The process includes the use of a resin-swelling solvent (e.g., isopropyl alcohol) to deliver an effective amount of chemical compounds capable of slowing down the degradation rate of the photosensitive polymeric resin in the papermaking belt. The solvent delivery technique makes it possible to deliver useful quantities of chemical compounds to the resin containing papermaking belts that would not normally be possible to add because of their low direct solubility in the polymeric resin and/or process incompatibility. Preferably, the chemical compounds are antioxidants (e.g., hindered phenols) which inhibit or retard oxidation of the cured resin and its ensuing degradative effects.
REFERENCES:
patent: 4526918 (1985-07-01), Burton
patent: 4728530 (1988-03-01), Waldvogel et al.
Hood William H.
Trokhan Paul D.
Bamber Jeffrey V.
Braun Fredrick H.
Fisher Richard V.
Friedman Charles K.
Hersko Bart S.
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