Nucleation Additives for Foam Extrusion
Promix Procell A120 Microcellular Foaming Technology
Promix nucleation additives are advanced polymer processing additives developed to optimize foam extrusion processes by enabling uniform cell formation, stable foam structure and improved product performance.
Promix Procell A120 is an active nucleating agent designed for both physical and chemical foaming applications. The additive decomposes under controlled thermal conditions, creating nucleation sites in the polymer melt and enabling the formation of fine-cell foam structures with improved density distribution and mechanical properties.
The system works in combination with CO₂/N₂ physical foaming or chemical foaming processes to enhance weight reduction, raw material savings and thermal insulation performance.
Process Performance Advantages
Promix nucleation additives deliver measurable improvements in foam extrusion processes:
• Uniform and fine-cell foam structure
• Improved density stability and surface quality
• Weight reduction and raw material savings
• Optimized stiffness and mechanical performance
• Enhanced thermal insulation properties
• Improved process stability and repeatability
Procell A120 is highly effective even at very low dosing levels and enables consistent foam formation across a wide processing window.
Technical Characteristics and Processing Parameters
Promix Procell A120 nucleation additive is engineered for extrusion and direct gassing processes:
• Dosage level: 0.3 - 0.5 wt% for nucleation
• Activation temperature: >180°C
• Recommended extrusion temperature stage: 210-220°C
• Maximum processing temperature: <280°C
• Physical form: off-white, dust-free polymer-bound pellets
• Packaging: 10-25 kg bags
• Storage conditions: <40°C, dry and UV-protected
These parameters ensure reliable activation and efficient nucleation in extrusion processes.
Material Compatibility
Promix nucleation additives are compatible with a wide range of polymers:
• PP, PE, PET
• PS and styrenics
• ABS, PA
• TPE, PLA
• Recycled polymer systems
The additive enables stable foam formation even in recycling-based extrusion applications.
Foaming Mechanism
Active nucleating agents release gas upon thermal decomposition, forming nucleation points in the polymer melt. Under pressure, the gas remains dissolved; upon pressure release at the die, a uniform foam structure develops.
This mechanism enables:
• Controlled microcellular foam formation
• Improved cell distribution
• Stable expansion behavior
• Reduced density variation
The additive can also be used without external blowing agents at higher dosage levels for chemical foaming applications.
Processing Guidelines
For optimal foam extrusion performance:
• Keep feeding zone temperature below 150-170°C
• Ensure barrel temperature exceeds 210-215°C for full activation
• Avoid vacuum degassing during foam processing
• Enable rapid cooling after die exit for stable foam expansion
Typical masterbatch concentration:
• ~0.3% for nucleation
• ~1.5% for chemical foaming
These settings support stable foam structure and consistent process control.
Industrial Applications
Promix nucleation additives are used across multiple foam extrusion applications:
Packaging
• Thermoform trays
• Foam films
• Food-contact packaging
Construction
• Insulation boards
• Foam panels
Extrusion products
• Foam sheets
• Profiles and pipes
• Cable insulation
Injection and extrusion foaming applications benefit from fine-cell structure and improved surface appearance.
Food Contact Compliance
Procell A120 complies with major international food-contact regulations including EU, FDA and other global frameworks, when used within polymer processing applications and under proper conditions.
This makes it suitable for packaging and food-related extrusion applications requiring regulatory compliance.
Operational and Safety Characteristics
• Polymer-bound pellet form reduces dust formation
• Low inhalation and handling risk under normal use
• Stable under standard storage conditions
• Melting point above 90°C
The product is designed for industrial processing environments with standard extrusion safety procedures.
Why Promix Nucleation Additives?
• Active endothermic nucleation technology
• Effective at very low dosing levels
• Compatible with physical and chemical foaming
• Uniform microcellular foam structure
• Improved mechanical and insulation performance
• Suitable for recycled materials
• Food-contact compliant grades available
Promix nucleation additives form a key component in modern foam extrusion lines, enabling manufacturers to produce lighter, more efficient and high-performance polymer foam products with consistent quality and process stability.
