Hi all,

Something I have wondered for awhile now, when a resin manufacturer has their recommended Back Pressure, why do they specify in PSI and not PPSI. It is hard for me to believe that they mean PPSI on their data sheets because one particular resin I am looking at (Celanex 2004-2) states that 0 - 50 PSI be used. If this is supposed to be Plastic Pressure, then I would be afraid of risking un-melted pellets getting through, It's hard for me to believe that is enough BP. We currently run this material between 800 to 1000 PPSI. What are your thoughts on this? Thanks in advanced, and Keep On Molding!

Bobby