Ölauftragsrolle für elektrofotografischeN Fixierung und ein Verfahren diese herzustellen

• Main Author: ISHIKAWA, YOUICHI
• Format: Patent
• Language: German
• Published: 29.08.2002
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BEARINGS; BLASTING; CHEMISTRY; CINEMATOGRAPHY; COMPOSITIONS BASED THEREON; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOLOGRAPHY; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LIGHTING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MAGNETOGRAPHY; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPRAYING OR ATOMISING IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Disclosed herein is an oil application roll for electrophotograph fixation, which comprises a roll base (1), an oil holder (10) provided on the roll base, and a porous fluororesin surface layer (4) provided on the oil holder. The porous fluororesin surface layer (4) has a maximum pore diameter of less than 0.1 mu m, an air permeability of 500 to 6000 s/100 cc, and a surface roughness of less than Ra 0.5 mu m. There is also provided a method of fabricating an oil application roll for electrophotograph fixation, which comprises the steps of (a) providing an oil holder on a roll base, (b) mounting a cylindrical film consisting of porous fluororesin having a thermal shrinkage of more than 30 % onto the oil holder to obtain a roll body, and (c) heating the roll body so that the oil holder is covered with the cylindrical film. The cylindrical film consisting of porous fluororesin has a maximum pore diameter of less than 0.1 mu m, a void ratio of between 25 % and 70 %, an air permeability of between 500 s/100 cc and 4000 s/100 cc, and a surface roughness of less than Ra 0.5 mu m.