Enable higher use of recycled polyethylene in blow moulding while maintaining stable parison control, consistent wall thickness, and reliable end-product performance.

Using recycled HDPE in blow moulding often leads to:

• Low melt strength → unstable parison
• Sagging in large parts and thick sections
• Poor wall thickness distribution
• Variability in material quality and MFR
• Reduced mechanical performance and ESCR

These issues limit the use of recycled material and increase scrap and process instability.

Reactive Recycling™ masterbatches rebuild polymer structure directly during processing, restoring melt strength and enabling stable blow moulding conditions.

This allows converters to move from unstable processing to reliable production with higher recycled content.

Reactive Recycling™ rebuilds polymer structure during extrusion, improving melt strength and process stability.

This stabilizes processing and enables the use of recycled materials in demanding blow moulding applications.

Key effects

• Restores melt strength
• Stabilizes parison formation
• Reduces sagging and deformation
• Improves wall thickness consistency
• Reduces sensitivity to variable feedstock

NexCircle® R401 is a next-generation melt strength enhancer masterbatch within the Reactive Recycling™ portfolio, designed to improve processing performance of recycled polyethylene.

By restoring melt strength during extrusion, it enables more stable processing and allows blow moulders to increase recycled content while maintaining dimensional control and consistent production conditions.

Key benefits

• Delivers stable parisons even at high recycled content
• Reduces sagging in large parts and thick sections
• More stable parison leading to fewer collapses and defects
• Improves wall thickness consistency
• Widens processing window for variable rHDPE quality
• Avoids the need for virgin PE to correct melt flow
• No MFR drift and no colour impact

NexCircle® R401 builds on the proven performance of NEXAMITE® R305, offering higher efficiency and improved performance at lower dosage.

While R305 provides a robust and widely used solution for increasing melt strength and stabilizing processing, R401 delivers stronger effects per % addition, enabling more stable extrusion, better handling of variable recycled feedstock, and reduced reliance on virgin material.

Comparison of MFR reduction between NEXAMITE® R305 (5 wt %) and the new NexCircle® R401 in compounded rHDPE.

Visit our product page for rPE here: Stable Processing of rPE at Higher PCR Content

Beyond processing improvements, NEXAMITE® R305 enhances mechanical performance in recycled HDPE.

Testing shows:

• Significant improvement in ESCR performance
• More than 200% increase in lifetime before failure at higher dosage

This enables the use of recycled material in more demanding applications.

ESCR measurement according to ASTM D-1693-01. Time to where 50% of the samples crack.

Recycled polyethylene often has reduced antioxidant levels, limiting durability.

Product: OIT Booster – PE 0188L — a specially tailored masterbatch designed to restore stability by improving resistance to thermal oxidation.

• Improves OIT and long-term durability
• Compensates for reduced antioxidant levels in recycled material
• Supports performance during processing and use
• Improves long-term performance in packaging and technical parts
• More consistent stability across recycled batches

OIT improvement with different addition levels of OIT Booster – PE 0188L. Higher OIT is better.

In addition to Reactive Recycling™ and advanced stabilization, Nexam Chemical offers different masterbatches:

Standard additive solutions

• Antioxidants (AO)
• Colour masterbatch
• Mineral masterbatch (increased stiffness)
• Impact modifiers
• Processing aids (flow / mould release / slip)
• Antistatic additives
• Laser marking additives

Product page: Additives and Functional Masterbatches

Colour consistency is a major challenge with recycled materials.

• Custom colour masterbatch
• Solutions adapted to recycled feedstock
• Consistent and controlled colour results

ReColour Plus™

Colour masterbatches specifically designed for recycled polyolefins.

A specialized approach for colouring recycled polyolefins:

• Designed to handle variable feedstock
• Improved colour consistency despite fluctuations
• Reduced risk of visual defects
• Enables controlled and predictable colour outcomes

Product page: ReColour Plus™

Achieve stable production, consistent quality, and improved performance in HDPE blow moulding with recycled materials.

Share your material, process, or requirements — our team will help you find the right solution.

sales@nexamchemical.com