| 摘要 |
Polyolefin powder is produced by injecting a jet of molten polyolefin (e.g. at 120 DEG to 300 DEG C. and up to 500 p.s.i.g.) into a stream of gas or vapour (e.g. air or steam at up to 200 p.s.i.g. and at a velocity of 300 to 1700 feet per second) such that the jet and stream are turbulently mixed, then passing the mixed stream into a mixing chamber and then discharging via a nozzle to atmospheric pressure for solidification of the polyolefin. |
