Purging Compounds for Custom Molders

Custom molders operate in one of the most unpredictable and fast-moving segments of the plastics industry. A production schedule that calls for pink, fluorescent TPE fishing lures and green PP lawn chairs on Monday may shift to orange ABS fishing lures and white PP lawn chairs by Tuesday morning. This constant change makes effective purging compounds essential.

Whether you run short production jobs, specialty resins, multiple colorways or back-to-back material changeovers, your ability to purge quickly, cleanly and consistently can determine whether your shop stays profitable or falls behind.

For custom injection molders, the challenge isn’t just speed. It’s efficiency, accuracy and versatility. You must purge thoroughly enough to eliminate contamination, yet fast enough to keep production moving. You need exceptionally clean barrels, screws and hot runner systems, without managing dozens of different purging grades. Most importantly, you need a purging solution that performs reliably across the wide range of resins used in custom molding.

That’s where Purgex™ Purging Compounds stand apart. Purgex is engineered to simplify changeovers, support preventive maintenance, reduce scrap and help teams manufacture high-quality plastic parts with fewer interruptions and less waste. When every minute of machine time matters, Purgex gives custom molders a dependable way to stay agile and competitive.

Why Custom Molders Need the Right Purging Compound

Unlike high-volume producers that may run a single resin for weeks or months, custom molders routinely switch between materials, grades, temperatures and colors. These frequent transitions can introduce a range of problems, including:

Residue from high-temperature resins remaining in the barrel when switching to lower-temperature materials
Colorants and carbonized material plating inside the barrel, screw or hot runner system
Increased scrap caused by contamination buildup
Extended machine downtime due to long or ineffective purging cycles
Storage and inventory challenges from stocking multiple specialized purging grades

In this environment, a generic approach to purging rarely works, unless the purging compound is specifically engineered for broad resin compatibility and consistent performance.

Purgex is designed for exactly these realities. With fewer grades to learn, stock and manage, custom molders gain efficiency without sacrificing cleaning performance. And because Purgex is safe for barrels, screws and hot runner systems, operators can purge with confidence during every shift and every changeover.

Flexible Purging Options for Custom Injection Molders

One Purging Compound for Many Resins

Custom molders often process everything from commodity resins to engineered plastics. Instead of requiring a different purging material for each application, Purgex offers grades designed to cover a wide range of materials, including:

PP, PE, TPOs and TPEs
ABS, PS and PVC
Acetal and nylons
Polycarbonate
Filled and reinforced materials
And more

Most facilities find that one or two grades of Purgex can handle virtually every resin and color processed in the plant. This is especially valuable for operations that run resins with wide processing temperature ranges. Whether changeovers occur at 380°F, 550°F or higher, Purgex maintains stability, flow and cleaning effectiveness throughout the purge.

Fewer purging products means:

Less confusion on the production floor
Reduced storage requirements
Simplified operator training
Lower administrative burden
Greater process consistency

Your materials may change constantly but your purging compound doesn’t have to.

Quick Order Turnaround for Fast-Moving Operations

Custom molding shops frequently receive short-notice orders, unexpected resin substitutions or urgent color changes. In these situations, waiting lengthy periods for a purging compound shipment simply isn’t practical.

Every grade of Purgex is manufactured in our Houston, Texas facility, with additional distribution centers strategically located around the world. This ensures fast, reliable fulfillment, even when production schedules change overnight. Whether you’re running large production volumes or short, specialized jobs, Purgex purging compounds are available when you need them.

Technical Expertise You Can Rely On

Custom molders don’t just need a purging compound, they need a partner with deep technical knowledge and real-world experience. Purging compounds are our only business.

The Purgex technical team brings decades of hands-on expertise in:

Polymer characteristics and lab testing
In-plant trials on production molding equipment
Troubleshooting difficult resins and contamination issues
Supporting operators and supervisors during complex transitions
Hot runner cleaning and maintenance purging
Shutdown and startup purging procedures
Reducing scrap during high-variation production shifts

We take the time to understand your operation, including resin selection, temperature ranges, color requirements and equipment configuration. From there, we recommend the Purgex grade best suited to your needs. Support doesn’t end with the sale; our technically experienced team remains available to assist with new jobs, challenging materials or unexpected issues whenever they arise.

Cost Savings That Support Long-Term Profitability

For custom injection molders, time truly is money. Every minute spent purging reduces production capacity. Every streak, speck or contaminated part adds directly to scrap costs.

Efficient purging compounds make a measurable difference.

Purgex helps reduce operating costs through:

Faster color and material changeovers
Lower scrap rates
Fewer rejected molded parts
Reduced resin consumption during rinse-out
Shorter purging cycles
Cleaner equipment over time
Fewer labor hours spent troubleshooting contamination

In facilities where margins are tight and schedules change frequently, these improvements can translate into thousands—or even tens of thousands—of dollars saved each year.

Supporting Long-Term Machine Health

A cleaner machine is a more reliable machine.

Routine purging helps prevent:

Carbon and contamination buildup
Color retention issues
Deposits in hot runner systems
Residue in screws and barrels
Unplanned process adjustments necessitated by contamination

Using Purgex regularly as part of a preventive maintenance program helps extend equipment life, improve consistency and protect your ability to produce high-quality plastic parts day after day.

The Bottom Line: Purgex Makes Custom Molders More Competitive

Custom molders succeed by staying flexible. Purgex delivers the purging performance, versatility, and reliability needed to keep pace with constant change. With fewer grades to stock, fast order turnaround, expert technical support and proven cleaning effectiveness, Purgex helps custom injection molders simplify operations, reduce scrap, minimize downtime and deliver clean parts, no matter what the schedule demands.

When change is the only constant, choose the purging compound engineered to handle it.