Quality Purging Compounds for Extruders

Clean Faster. Reduce Downtime. Improve Results.

When it comes to the extrusion process, cleanliness isn’t optional—it’s essential. Long runs and high output can leave behind contamination, built-up colorants, and burnt-on resin. Without the right purging compound for extruders, these leftovers wreak havoc on your next production run, leading to streaks, black specks, and costly downtime.

Purgex™ delivers compounds for extruder applications, specifically engineered to reach tough zones like extrusion dies, accumulators, and the full screw and barrel system. Whether you’re dealing with color changes, switching resins, or shutting down at high temperatures, Purgex gets the job done.

Why Choose Purgex as Your Extrusion Purge Solution?

Purgex isn’t a one-size-fits-all solution. We offer a wide range of purging materials designed to:

• Pass through extrusion dies as small as 0.030″ (0.755mm) without clogging
• Handle both single- and twin-screw extruder designs
• Work across multilayer systems and varying melt flow indexes (MFI)

Unlike basic extruder purge materials or manual cleaning, Purgex’s active cleaning formula uses a unique foaming action to expand, scrub, and clear contaminants—including resin, pigment, and carbon build-up.

Solving the Real Problems in Extrusion Purging

Extrusion operations come with real-world challenges. Here’s what we help solve:

• Carbon buildup after long or extended runs
• Highly pigmented colorants that cling to metal and bleed into the next production material
• Burnt-on high-temp resin that flakes off during the next cycle
• Material compatibility issues when switching between resins
• Inconsistent purging procedures across shifts

These issues all increase scrap rates, lower production efficiency, and reduce profitability. The right extruder cleaning compound makes a measurable difference.

How Purgex Improves Your Purging Procedure

The Purgex team has developed a trusted extruder purging procedure to help you transition between materials or colors more effectively. Here’s how to do it:

Standard Purging Procedure

1. Stop the screw rotation and shut off the feed.
2. Clean the hopper and colorant blender.
3. Load selected Purgex grade into the feed zone.
4. Resume screw rotation and begin purging until Purgex is fully visible at the die.
5. Soak the compound in the barrel (as appropriate to resin type).
6. Purge until nearly empty.
7. Introduce the new production resin, purging 1 to
   –1.5 barrel capacities to flush remaining Purgex from the barrel.
8. Inspect purge pile. If streaking or residue remains, repeat purge with additional Purgex followed by the next production resin to rinse Purgex out of the extruder.

This process ensures a clean extrusion environment, minimizing cross-contamination and extending the life of your equipment.

Color/Carbon Streaking: How to Identify and Eliminate It

Streaking in extrusion—whether caused by pigment or carbonized resin—is one of the most frustrating issues operators face.

• If streaking appears immediately after a purge, the purging material isn’t reaching the end zones of the extrusion die.
• If streaking appears mid-run, contaminants were only covered—not removed—by the purge and are breaking free during production.

Conventional extruder purge material often fails to reach critical end points like die heads, accumulators, or dead spots behind flights. Purgex’s foaming action expands into void areas and removes even stuck-on residue.

That means less mid-run contamination, reduced need for equipment to be manually cleaned, and a faster changeover to your next production run.

Extruder Cleaning Compound for Diverse Applications

Our purging compounds are used in a variety of extrusion-based manufacturing sectors, including:

• Film and Sheet Extrusion: Fast material changes and clean layers.
• Pipe, Profile, and Tube: Clean dies without teardown
• Extrusion Blow Molding: Maintain accumulator and die cleanliness

Whether you’re working with a legacy or a state-of-the-art extruder, Purgex adapts to your setup and gets you back into production faster.

How Purging Compounds Impact Profitability

Think of purging as preventive maintenance: invest a little now to save a lot later. A quality purging compound doesn’t just clean—it protects your machinery and ensures; more acceptable parts/fewer rejects on every production run.

With Purgex, you get:

• Lower scrap rates and fewer rejected parts
• Significant savings in cost to purge
• Extended equipment life, including screws and dies

Let us know your:

• Location (to connect you with your regional rep)
• Extrusion application (film, sheet, pipe, profile, blow molding, etc.)
• Current resin or colorant challenges

And we’ll match you with the best purging material to try.

Discover Cleaner Starts and Smoother Runs

For over three decades, Purgex has helped manufacturers transition faster and produce cleaner parts. With our foaming-action purging compound, you don’t just reduce scrap—you take control of your process.

Request a sample. Explore our recommended grades. Or contact us to get matched with a Purgex product that fits your unique situation.

Clean smarter. Purge better. Run longer.