Two part epoxy static mixer - introducing air bubbles
Two part epoxy static mixer - introducing air bubbles
(OP)
I want to use a static mixer nozzle to mix hardener with an epoxy resin that both are formerly degassed in separate containers.
The question is that is the mixing in the nozzle going to introduce air into the polymer mix and all degassing process done will become pointless?
It is well known that excessive disturbing degassed mixture can bring air back into the substance (like in the stirring mixing process), however I never came across any information with regards to static mixing process.
Any thoughts?
Stan
The question is that is the mixing in the nozzle going to introduce air into the polymer mix and all degassing process done will become pointless?
It is well known that excessive disturbing degassed mixture can bring air back into the substance (like in the stirring mixing process), however I never came across any information with regards to static mixing process.
Any thoughts?
Stan





RE: Two part epoxy static mixer - introducing air bubbles
RE: Two part epoxy static mixer - introducing air bubbles
One very serious problem I have experienced with two part syringes and static mixers is an air pocket in the syringe itself. It is not unusual for there to be some air in the syringe when you buy it or to get some into the syringe between uses. When you press on the plunger, resin will flow immediately from the syringe chambers with no air pocket. If there is an air pocket, first the pocket will be compressed, with no immediate flow of resin. Then after stopping the plunger, the air pocket will expand and continue to press resin from the one chamber. So, if you see any resin dribbling out after dispensing is done, it indicates a problem that should be immediately corrected. The resin ratios will not be correct. This issue is most serious if you are dispensing drops of resin.
RE: Two part epoxy static mixer - introducing air bubbles
Cheers
Greg Locock
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