The processing process, equipment and processing methods of fluororubber are the same as those of general rubber. Due to its structural characteristics, its processing performance is poor, which is briefly described below.
(1) Plastic smelting: Raw rubber is thinned 10 times in an open mill with a roller distance of 0.3 to 0.5 mm, and the compounding agent can be added to the roll.
(2) Mixing:
Capacity: The capacity of fluorine rubber is even smaller than that of synthetic rubber.
63 kneader 500 g
143 mixer 5000 g
Roller temperature: 40-60 ° C
Adding order: raw rubber → acid absorbent → processing aid → filler → vulcanization accelerator.
After the compounding agent is added, evenly and thinly pass the triangle bag, roll, and lower the back sheet.
(3) curing
165-170 ℃ × 10min
The second stage is 230 ℃ × 24h (to ensure that the temperature is gradually increased. After 230 ℃, the temperature is kept constant.