What is a Purging Agent?

As an experienced injection moulder, we know that machine cleanliness isn't just about hygiene — it’s critical for product quality, efficiency, and equipment longevity. That’s where purging agents come in.

The Role of Purging Agents in Injection Moulding

A purging agent is a specialised cleaning compound used in plastic processing equipment such as injection moulding machines and extruders. Its purpose is to flush out:

• Residual materials from previous production runs

• Colour changes that could contaminate new batches

• Degraded or carbonised plastic that builds up over time

By using purging agents, we reduce downtime, minimise waste, and maintain consistent, high-quality output — key priorities for any injection moulding company.

Why We Use ULTRA PLAST — Supplied by 3PA

At Great Central Plastics, we use ULTRA PLAST purging compounds, supplied by trusted distributor 3PA, for one clear reason, they deliver results.

Here’s why ULTRA PLAST is our purging agent of choice:

✅ Compatible With a Wide Range of Materials

ULTRA PLAST offers a variety of grades suitable for commodity and engineering plastics — from polyolefins and ABS to polycarbonate, nylon, and high-performance polymers.

✅ No Machine Disassembly Needed

ULTRA PLAST can be run directly through our machines, without dismantling anything. This allows for quick changeovers, reduces wear, and boosts efficiency — all crucial in a fast-paced injection moulding company like ours.

✅ Food Contact and Eco Compliance

Several ULTRA PLAST grades are FDA and EU-approved, making them ideal for food-grade applications. In line with our commitment to sustainability, we also use ULTRA PLAST in combination with our eco friendly plastics to ensure safe, clean, and responsible production.

✅ Less Scrap, Better Quality

ULTRA PLAST is designed to prevent carbon build-up and reduce the appearance of black specks during colour or material changes — ensuring high level cosmetic quality and lower reject rates.

A Cleaner Process for a Cleaner Product

At Great Central Plastics, we pride ourselves on being a forward-thinking injection moulder with a strong focus on quality and sustainability. Using ULTRA PLAST helps us:

• Improve production efficiency

• Reduce machine downtime

• Lower material waste

• Support our work with eco-friendly plastics

It’s just one of the many ways we uphold our promise to deliver high-quality, sustainable plastic components — every time.

For more information on What is a Purging Agent? talk to Great Central Plastics Ltd