| 摘要 |
PURPOSE:To obtain a thermal fixing roll by which a high definition picture can be obtained even when its diameter is decreased by providing the outer layer composed of a fluororesin tube on the surface of a sponge roll, and the inner layer of the room temp. curing liquid rubber of excellent adhesion injected into between a sponge layer and the fluororesin tube. CONSTITUTION:The silicone sponge layer 2 is cylindrically provided on the outer periphery of a metal core, and the silicone rubber layer 3A and the tube layer 3B of perfluoroalkoxyl resin are provided thereon in this order. The outer layer 3B prevents toner from staining the surface of the sponge layer 2 as a base layer, while exhibiting enough releasability from the toner without being affected by silicone oil, etc., even when it coated with them. The inner layer 3A is composed by injecting the room temp. curing liquid rubber of excellent adhesion into a space between the sponge layer 2 and the outer layer 3B and setting: The fluororesin tube is firmly fixed onto the surface of the roll by the inner layer 3A with its enough adhesion without damaging the resiliency of the base layer. |
