The sample toner is preheated to an preliminary set temperature of 70 ° C for 300 seconds, after which heated at a constant rate of temperature improve of 6 C / min by applying an extrusion load of 20 kg over the stamper. Under this condition, punch waste quantities are measured in opposition to temperatures in order that a softening property curve as proven in FIG 1 shown is obtained.

The silicone rubber (S-6) was one which, upon curing, offers a dimethyl silicone rubber having a fifty nine.5 bar (5.ninety five × 10 7 dyn / cm 2 and a loss modulus of two.04 bar (2.04 × 10 6 dyn / cm 2 ). The silicone rubber (S-5) was one which, upon curing, provides a dimethylsilicone rubber having a storage modulus of 20.1 bar (2.01 x 10 7 dyn / cm 2 and a loss modulus of 0.788 bar (7.88 × 10 5 dyn / cm 2 ). The silicone rubber (S-4) was one which, upon curing, offered a dimethylsilicone rubber having a storage modulus of four bar (0.4 × 10 7 dyn / cm 2 and a loss modulus of zero.forty six bar (4.6 × 10 5 dyn / cm 2 ). The silicone rubber (S-three) was one which, upon curing, offered a dimethylsilicone rubber having a storage modulus of 9 bar (0.9 x 10 7 dynes / cm 2 ) and a loss modulus of 0.30 bar (three.0 × 10 5 dyn / cm 2 ). The silicone rubber (S-2) was one which, upon curing, supplied a dimethylsilicone rubber having a storage modulus of 8.9 bar (0.89 x 10 7 dynes / cm 2 ) and a loss modulus of zero.70 bar (7 , 0x10 5 dyn / cm 2 ).

Referring to 1 At a relentless rate of temperature rise of the stamper, it initially drops to some extent because of the packing of the powder sample into a strong mass in the cylinder , and then assumes a considerably motionless state . Upon further heating, the toner sample begins to circulate by way of the nozzle and flows at an increasing price to finish its flow as by stopping the punch to acquire an S-shaped softening attribute curve. The Ferric chloride is a element used to offer a Dimethyl silicone rubber is effective, which is a small change the bodily energy and a small change in viscoelasticity after his hardening reveals. It can be used in an quantity of no less than three ppm in order that his Effect is shown sufficiently. On the opposite hand, to fulfill the physical strengths, the memory module and the loss module are required to exceed certain decrease limits.

Referring to 2 the system closes an outer housing 1 of the apparatus primary physique and a studying unit A scanning the unique, which is mounted on the outer case. In the operation of the studying unit A, an original O is directed with its picture floor down at a prescribed place on an authentic floor glass 2 connected and with a Originalpreßplatte three lined. One sharp-melting toner having such temperature-soften viscosity characteristics causes an especially sharp lower in viscosity. In this fashion, improved shade reproducibility in the ensuing mounted toner image for disposal posed.

More specifically, it has been discovered in this connection that it is necessary to kind a surface layer of dimethylsilicone rubber having a storage modulus greater than 1.0 bar (1 x 10 6 dynes / cm 2 ) and a loss modulus higher than 0.10 bar (1, 0x10 5 dynes / cm 2 ). The Heat-stress fixing based on the current The invention can present a good toner releasability for a long period of time show a small application quantity of dimethylsilicone oil, and was provided by a methodology of our research, as described below. the dimethylsilicone oil is applied to the surface of the fixing element at a price of 1 to twenty mg per 621 cm 2 .

A flow tester ('CFT-500A', available from Shimadzu Seisakusho KK) geared up with a 0.2 mm diameter nozzle with a size of 1.0 mm is used for the measurement. A finely powdered toner pattern, accurately weighed to 1 to 3 g, is placed in a vertical cylinder which ends up in the nozzle and pressed beneath a punch with a cross-sectional area of 1.zero cm 2 .