Purging Compounds Information Chart

Selecting the right purging compound can feel complicated, especially when you’re running multiple resins, processes, and temperature ranges in the same facility. That’s why having clear, practical purging compound information is essential for making the right decision quickly.

The Purgex™ grade comparison chart is designed to simplify that process. Instead of forcing you to manage multiple niche products, Purgex offers a streamlined approach with multi-purpose grades that can handle a wide range of applications, materials, and operating conditions.

Whether you’re working in injection molding, extrusion, or blow molding, understanding how different grades perform, and when to use them, can help you reduce downtime, eliminate contamination, and improve overall production efficiency.

Products:	Purgex™ 456 Plus	Purgex™ 457 Plus	Purgex™ 459 Plus	Purgex™ 461	Purgex™ 602 Plus	Purgex™ 742	Purgex™ 3056 Plus	Purgex™ 3057 Plus
Process:
Injection Molding
Injection Blow Molding
Extrusion: Blow Molding
Extrusion: Profile
Extrusion: Compounding
Extrusion: Sheet
Blown Film
Uses:
Works Best On These Resins:	PP-Copolymer, PP-Homopolymer, PVC-Flexible, LDPE, HDPE	ABS, HDPE, PVC-Rigid, PU, PP-Copolymer, PP-Homopolymer, PMMA	PP-Copolymer, PC/ABS, TPOs, TPEs	LDPE, LLDPE, PVC-Flexible	PC, PS, SAN	PP-Copolymer, TPOs, PE	Nylon, PBT, POM	Nylon, PBT, POM, PET, PPO, PPA
Also Useful for:	TPEs, TPOs, PVC-Rigid, Startup, Shutdown, many other resins processed in this temperature range.	Nylon, PC/ABS, Startup, Shutdown, PE, PVC-Flexible, TPOs, LDPE, TPEs, PBT, many other resins processed in this temperature range.	ABS, Nylon, Startup, Shutdown, HDPE, PP-Homopolymer, PVC-Rigid, PVC-Flexible, PBT, POM, PE, PU, many other resins processed in this temperature range.			PP-Homopolymer, HDPE, LDPE	PVC-Flexible, PVC-Rigid, Startup, Shutdown, PET, PPO, PPA, many other resins processed in this temperature range	PVC-Flexible, PVC-Rigid, Startup, Shutdown, many other resins processed in this temperature range.
Amount Needed:
Amount	1 to 1.5 times barrel capacity, depending on condition of machine/tool and colorant/additive loading.	1 to 1.5 times barrel capacity, depending on condition of machine/tool and colorant/additive loading.	1 to 1.5 times barrel capacity, depending on condition of machine/tool and colorant/additive loading.	Use 15 lbs of Purgex™ 461 per 100 lbs of throughput. Note: After Purgex™ is used on a regular basis, the amount used to purge can often be reduced by 25 to 50%.	1 to 1.5 times barrel capacity, depending on condition of machine/tool and colorant/additive loading.	1 barrel capacity, depending upon condition of machine/tool and coolant/additive loading.	1 to 1.5 times barrel capacity, depending on condition of machine/tool and colorant/additive loading.	1 to 1.5 times barrel capacity, depending on condition of machine/tool and colorant/additive loading.
Temperature Range:
Fahrenheit	380ºF to 550ºF	380ºF to 550ºF	380ºF to 550ºF	250ºF to 450ºF	360ºF to 550ºF	375ºF to 475ºF	380ºF to 600ºF	380ºF to 600ºF
Celsius	193ºC to 288ºC	193ºC to 288ºC	193ºC to 288ºC	120ºC to 232ºC	183ºC to 288ºC	191ºC to 246ºC	193ºC to 316ºC	193ºC to 316ºC
Recommended For:
Hot Runners
Cold Runners
Mixing Nozzles
Extrusion: Dies
Check Valves
Melt Pumps
Accumulators

Universal Grade Purging Compounds: Simplifying Your Operation

One of the biggest advantages of Purgex is its ability to reduce complexity. Instead of requiring a different product for every resin or process, Purgex offers universal grade purging compounds that can perform across a wide range of applications.

In many facilities, a single Purgex grade can handle:

Multiple resins (commodity and engineering-grade)
A broad range of processing temperatures
Different machines, including injection molding, extrusion, and blow molding equipment
Startup, shutdown, and routine maintenance purging

This is a major advantage over competitors that require multiple purge compounds for different scenarios. Fewer products mean:

Less inventory to manage
Reduced risk of operator error
More consistent results across your plant

Purging Compounds Multi-Purpose Grades for Real-World Applications

Modern plastics processors rarely run just one material. A single production line may switch between polyethylene, polypropylene, ABS, nylon, or polycarbonate, sometimes within the same shift.

That’s why multi-purpose purging compound grades are so valuable.

Purgex grades are designed to:

Handle a wide range of processing temperatures
Remove contamination from previous runs
Work effectively across different equipment types
Deliver consistent results regardless of application

This flexibility is especially important in environments with frequent color or material changes, where an inefficient purge process can quickly lead to rising scrap and extended downtime.

Eliminating Black Specks and Contamination

One of the most common problems in plastics processing is contamination, especially black specks caused by carbon buildup or degraded material inside the machine.

These defects:

Ruin part quality
Increase scrap rates
Require additional purge cycles
Disrupt production schedules

Black specks often originate from:

Residual material left in the screw and barrel
High processing temperatures that cause resin degradation
Material stagnation in low-flow areas of the machine

Using the right purge compound is critical for eliminating these contaminants before they affect your parts.

Purgex purging compounds are designed to:

Dislodge and remove carbon buildup from internal surfaces
Eliminate degraded material that can cause defects and contamination
Clear dead spots and low-flow areas where resin can stagnate and degrade
Reduce the risk of black specks, streaking, and other surface defects
Help maintain consistent product quality between production runs

By addressing contamination at its source, Purgex helps maintain consistent product quality and reduce costly defects.

Safe and Effective Performance in Hot Runner Systems

Hot runner systems are widely used in modern injection molding operations to improve efficiency and reduce material waste. However, they also present unique challenges when it comes to purging.

Because material remains molten inside the system, contamination can linger in:

Manifolds
Nozzles
Valve gates
Mold cavities

Purgex is formulated to flow safely through hot runner systems, making it a reliable solution for cleaning without risking damage to high-value tooling.

This compatibility allows processors to:

Purge the entire system without removing molds
Maintain consistent flow through hot runner components
Reduce the risk of costly downtime or repairs

Supporting Injection Molding, Extrusion, and Blow Molding Operations

The versatility of Purgex extends across multiple processing methods, including injection molding and blow molding.

In injection molding, Purgex helps:

Clean the screw and barrel between material changes
Remove residue from previous colors or resins
Maintain consistent part quality during startups

In extrusion applications, Purgex supports:

Cleaning screws, barrels, and dies during material and color changes
Removing degraded resin and contamination from the extrusion line
Reducing downtime associated with screen pack and die cleaning
Improving product consistency during startups and changeovers

In blow molding applications, Purgex delivers:

Efficient purging of blow molding equipment
Removal of contamination from accumulators and dies
Cleaner transitions between production runs

This cross-process performance makes Purgex an ideal solution for facilities running multiple types of equipment.

Improving Your Purge Process for Better Results

Even the best purge compounds require proper procedures to deliver optimal results. A well-executed purge process ensures that contamination is fully removed and that new material can run cleanly from the start.

Key best practices include:

Using the correct amount of purge material based on barrel capacity, accumulator capacity, or screw size
Maintaining appropriate processing temperatures during purging
Allowing sufficient time for the purge to work throughout the system
Rinsing thoroughly before returning to production resin

Consistency is critical. When operators follow established purging procedures, results are more predictable, and performance improves across the board.

Why Purgex Stands Out Among Purge Compounds

With so many types of purging compounds available, choosing the right solution comes down to performance, versatility, and ease of use.

Purgex stands out because it delivers:

Multi-purpose grades that simplify operations
Compatibility with a wide range of resins and temperatures
Safe performance in hot runner systems
Effective removal of contamination and black specks
Consistent results across injection molding, extrusion, and blow molding processes

Instead of managing multiple specialized products, processors can rely on Purgex to handle the majority of their purging needs with confidence.

Simplify Your Purging Strategy with Purgex

The Purgex grade comparison chart is more than just a reference, it’s a tool to help you make smarter decisions about your purging strategy.

By leveraging universal grade purging compounds and multi-purpose formulations, you can:

Reduce complexity in your operation
Improve cleaning performance
Minimize downtime and scrap
Maintain consistent product quality

If you’re looking for reliable purging compound solutions that work across your entire facility, Purgex provides the performance and flexibility you need to keep production running smoothly. Our technical experts are available to answer your questions and recommend the most effective Purgex grade for your facility.