hand foam wash

Foam hand sanitizer, the principle is that the bottle mouth has a special device to fully mix the air and foaming agent. See the foam gun without fire, middle school must have done such an experiment, sagging slip to the gas flow place, because the fluid has pressure reduction, the middle of the foam gun, added a side many holes outside the cover, foam agent from the middle of the spray, because the air pressure drops, a lot of air sucked in from the side, mixed with it, produce foam.。。。。。。。。。。。。