BONDING PROCESS FOR FLUOROPOLYMER SLEEVES
Original Publication Date: 1980-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
This invention relates to a method of bopding a fluoropolymer sleeve to a roll. Such a sleeved roll may have various applications, such as the fuser or pressure roll in an electrostatographic copying machine. The method comprises first applying a layer of a lower melting fluoropolymer to the core, and then placing the sleeve (made of the higher melting fluoropolymer) over the coated core and heating the sleeve to shrink it to the roll. Then, melt and fuse the lower melting fluoropolymer to bond it to the core and to the higher melting fluoropolymer. In a specific example, ethylene-tetrafluoroethylene (ETFE) was applied to a metallic cors in the form of a powder 2 mils thick and baked at about melt temperature of 270 C. A sleeve of a perfluoroalkoxy (PFA) polymer 10 mils thick was slipped over the ETFE layer and the sleeve was heated to shrink it to the roll. Finally, the laminated roll was heated to a temperature between 27OoC and 31OoC, the melting point of PFA, to melt and fuse the ETFE to bond it to the metal core and the PFA sleeve.