Chemical vs Mechanical Purging Compounds: Choosing the Right for Plastics

Keeping plastic processing equipment clean is essential for consistent product quality, reduced scrap, and better production efficiency. A Purging Compound for Plastic is specially designed to clean the machine’s screw, barrel, and hot runner systems. The two main types—mechanical and chemical—offer different advantages depending on your needs. 

Mechanical Purging Compounds

Mechanical Purging Compounds use physical action to remove contaminants. They typically consist of a base resin mixed with abrasive fillers that push out residual material while scraping buildup from internal surfaces. Mechanical Purging is commonly used for color or material changes during routine operations.

It’s easy to use and usually doesn’t require any adjustments to the machine’s setup. However, it may struggle to remove carbonized or degraded resin in hard-to-reach areas.

Chemical Purging Compounds

Chemical Purging Compounds clean through a thermal-chemical reaction. Activated by heat, they produce foam or gas that expands and reaches areas mechanical compounds can’t. The chemical action breaks down stubborn contaminants like carbon deposits and degraded resin.

This type is ideal for deep cleaning during shutdowns, switching from dark to light colors, or dealing with tough buildup. While they may require temperature adjustments, chemical purging delivers a more thorough clean.

Which One Should You Use?

Choosing between mechanical and chemical purging depends on your process. Mechanical compounds are perfect for regular, light-duty cleaning. Chemical Purging is better for demanding applications and thorough cleaning.

Often, combining both methods gives the best results—mechanical purging clears most of the material, followed by a chemical purge to clean remaining deposits.

Choose UnicleanPlus

UnicleanPlus provides both mechanical and chemical Purging Compounds tailored for injection molding, blow molding, and extrusion. Their products are designed to clean effectively without damaging equipment, reducing purging time and material loss.

Safe, easy to use, and compatible with a wide range of resins, UnicleanPlus Compounds help manufacturers maintain cleaner machines and better-quality output. Supported by strong technical expertise, they offer reliable solutions for any plastic processing setup.

Conclusion

Your choice between chemical and mechanical purging should align with your production challenges. For efficient, effective, and reliable cleaning solutions, turn to UnicleanPlus—a trusted partner in plastic processing efficiency.