Purging Compound
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Riviera Polymers Private Limited was envisaged in 1982. The organization had to become a mark to reckon with in the manufacture of Colour and Additive Concentrates and Special Thermoplastic Compounds. Two decades on, we are living as Brand Riviera and remain the front-runner manufacturer of high-quality Masterbatches and Specialty Thermoplastic Compounds in India.
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Purging Compound: Clean Transitions, Less Downtime in Plastic Processing
In high-volume plastic processing environments, material and color changes are routine—but time-consuming and wasteful if not managed properly. Residual polymers, pigments, and degraded material can cling to machinery, causing:
- Color contamination
- Black specks
- Material incompatibility
- Increased scrap rates
- Costly downtime
To eliminate these issues efficiently, processors rely on Purging Compounds—specially formulated materials designed to clean plastic processing equipment quickly, safely, and thoroughly.
What is a Purging Compound?
A Purging Compound is a specialized plastic resin-based material formulated to clean extruders, injection molding machines, blow molding equipment, and hot runners during material, color, or polymer changeovers.
It removes:
- Residues of previous polymers
- Color masterbatch remnants
- Degraded or burnt material
- Carbon build-up in screws, barrels, nozzles, and dies
It’s used between runs or before shutdowns to save time, reduce scrap, and increase operational efficiency.
How Does It Work?
Purging compounds work in two ways:
1. Mechanical Cleaning
- Filled with non-abrasive, high-viscosity resins that scrub surfaces by pushing out old materials.
2. Chemical Cleaning
- Contain reactive agents that break down and dissolve carbonized or degraded polymer residues.
Some modern formulations combine both actions for deeper and faster cleaning.
Types of Purging Compounds
Type | Description |
Mechanical Purge | High-viscosity, filled resins that push out residues. |
Chemical Purge | Reacts with residues to dissolve and remove carbon or color. |
Hybrid Purge | Combines mechanical and chemical actions. |
Foaming Purge | Expands under heat to clean hard-to-reach zones. |
Glass-Filled Purge | For aggressive cleaning, especially in large machines. |
Universal Purge | Compatible with multiple polymers. |
How to Use a Purging Compound (General Steps)
- Lower Hopper Material
- Run down existing resin to near-empty.
- Run down existing resin to near-empty.
- Feed Purging Compound
- Load recommended quantity (often 1–2 times the barrel capacity).
- Load recommended quantity (often 1–2 times the barrel capacity).
- Adjust Machine Settings
- Raise temperature if needed as per purge grade specs.
- Raise temperature if needed as per purge grade specs.
- Cycle or Extrude Purging Compound
- Run through until discharge is clean and color-free.
- Run through until discharge is clean and color-free.
- Introduce Next Resin
- Begin production with the new material or color.
- Begin production with the new material or color.
- For Shut-Downs
- Leave the purging compound inside to prevent degradation or rust.
Packaging & Storage
- Available in granules, pellets, or ready-to-use blends
- Packed in 25 kg bags or smaller user packs
- Store in cool, dry, shaded conditions
Conclusion
Purging Compounds are not just cleanup materials—they are productivity tools that reduce waste, downtime, and maintenance effort. If your factory deals with frequent material or color changes, adopting the right purging solution will lead to cleaner transitions, lower costs, and smoother operations.
Benefits
Minimizes Downtime
Reduces Scrap Rates
Protects Equipment
No Equipment Dismantling
Cost-Effective
Safe & Non-Corrosive
Versatile Compatibility
Available in Ready-to-Use Grades
Industrial Applications
Injection Molding
Extrusion
Hot Runner Systems
Blow Molding
Compounding Lines
Elevating Plastics with Superior Purging Compound
Unmatched quality, performance, and customization for every industry.
Frequently Asked Questions
Our FAQ section provides clear answers to common questions about white masterbatches, from product features to application details. We aim to help you understand how our solutions can improve your plastic products. If you have further inquiries, our team is always ready to assist you.
What is a purging compound used for?
To clean plastic processing equipment between color or material changes.
Is it safe for my equipment?
Yes—non-abrasive and formulated to protect machinery.
Can it be reused?
No, it is a one-time-use material.
Is it better than natural resin flushing?
Yes—it’s faster, more effective, and less wasteful.
What’s the typical consumption?
1 to 2 times the volume of your machine’s barrel.
How long does it take to purge?
Usually 5–30 minutes depending on contamination level.
Can I use it in hot runner molds?
Yes—select a grade specifically designed for hot runner systems.
Will it remove burnt material or black specs?
Yes—especially chemical and hybrid grades are effective.
Can I use it on PET or engineering plastics?
Yes—special high-temperature grades are available.
Does it reduce color contamination?
Significantly—ideal for dark-to-light or opaque-to-clear transitions.
Is it FDA-approved?
Food-contact safe grades are available upon request.
Can it be used during shutdown?
Yes—it prevents oxidation and eases start-up the next day.
What temperature range does it cover?
From 160°C to 350°C depending on the formulation.
Can I blend it with my base resin?
Not recommended—use it neat for best results.
Is it suitable for medical-grade machines?
Yes—cleanroom-compatible grades are available.
Does it leave a residue?
No—it clears out completely when used as directed.
Will it reduce start-up waste?
Yes—faster transition = less scrap = more savings.
Can I use it in blown film lines?
Yes, especially for thin films with frequent changes.
Does it need special handling?
No—it’s processed like standard resin.
Where can I buy high-quality purging compound?
From trusted suppliers or B2B platforms like MasterbatchManufacturers.com.
Other Products
Other
Transparent Masterbatches
UV Masterbatch
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Roto Pre Masterbatch
Mono Concrentrates
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That’s why we created a one-stop platform that connects buyers and suppliers in the niche category of Masterbatch worldwide.
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That’s why we created a one-stop platform that connects buyers and suppliers in the niche category of Masterbatch worldwide.
Quick Links
Contact Info
Address
421/C, 4th Floor, Super Mall-1, Gh-0, above SBI Bank, Infocity, Gandhinagar, Gujarat 382007
