• Purgex is a scientifically engineered purging compound that can be effectively used to clean a wide range of resins.

• It takes only a small amount of purging compounds from Purgex to get the job done right.

• All Purgex grades are safe and effective for cleaning hot runner systems*, mixing nozzles, check valves, melt pumps, and extrusion dies*.

• Purgex is competitively priced and has the highest performance-to-cost ratio of any commercial purging compound on the market today.

• The active ingredients in Purgex™ neutralize hydrochloric acid (HCl) formed by PVC, thus preventing material contamination, black specks, and steel corrosion.

*A small as .030″ (.75mm) in diameter.

The amount depends on the process. For an open-mold hot runner purge, PP-101 Rev 2 specifies three times the machine’s injection capacity for first use and twice the injection capacity for routine use. For an extruder and die, PP-200 Rev 2 specifies 6–10 pounds of Purgex per inch of screw diameter.

Use the procedure for your equipment and selected grade. Contact your Purgex representative for application guidance.

Yes, Purgex grades are formulated for versatility and perform across a wide variety of resins, eliminating the need for multiple purging compounds.

Yes.  Mixing nozzles, check rings, melt pumps, etc., have numerous small crevices where resin and colorant build up.  Purgex has the capability to penetrate and clean those hard-to-reach areas.

Yes, all Purgex purging compound grades are recommended for use in hot runner systems with gates as small as .030” (.755mm).

Yes, Purgex purging compounds can be molded.  This procedure is especially useful in certain circumstances such as larger parts with intricate areas, like speaker grilles.

Yes and no, depending on the particular situation.  Because all commercial purging compounds contain ingredients in addition to resin, this question must be considered on a case-by-case basis.

Purgex purging compounds can be used to clean melt pumps and extrusion dies with an opening of at least 0.030 inch (0.75 mm). Follow the procedure for your process and the operating limits for the selected grade.

The term “rinse” is used to describe the process of removing Purgex from the machine, hot runner system, die, etc., with the next resin.

Yes, Purgex is recommended for machine shutdown to help make startup faster, more efficient, and less problematic. Follow PP-107 for shutdown and startup. Eliminate soak times on resins processed over 600°F (316°C).

The carrier resin used in most Purgex grades is virgin polyethylene.