There are typically three (3) types of purging compounds:

1) Mechanical
2) Chemical
3) Liquid

Mechanical
A mechanical purging compound is effective for numerous applications. They rely on shear force and the differences in viscosity to clean. There is no chemical reaction and no soak time.

Chemical
A mechanical purge may not be effective in parts of the barrel, screw and manifolds where these is low pressure. A chemical purge is a better choice for this issue. Instead of shear force, a chemical reaction takes place when the purge contacts the resin or carbon. Some require no soak time while others require up to 30 minutes, all depending on several factors, such as the resin, size of barrel and screw, manifold size, etc.

Liquid
A liquid purge is usually a surfactant. It reduces the tension of the liquid in which it is dissolved. You could call it a hybrid, a somewhere between a mechanical and chemical purge.

Picking the right purging compound for your various applications requires a little research and testing. It is usually best to start with contacting an expert, such as Slide Products. With multiple purge types, and years of experience tackling tough purging applications, just a few minutes discussing your problem can narrow the choices quickly.

GET EXPERT ADVICE ON INJECTION MOLD RELEASES, CLEANERS, RUST PREVENTIVES, EJECTOR PIN GREASE AND PURGING COMPOUNDS

Slide Products offers trial quantities for testing a purge and often will send a technician to help processors fine tune to purging process and trim even more time off the purge cycle. Read Less...