Polymer Melt Cooling Systems
Promix P1 Cooling Mixer and Melt Cooler Technology
Promix melt cooling solutions are advanced engineering systems developed to precisely reduce polymer melt temperature in extrusion processes, ensure homogeneous temperature distribution, and improve overall production stability. By combining static mixing with highly efficient heat transfer technology, a uniform temperature profile is achieved across the entire melt flow cross-section.
Promix provides integrated process solutions for the plastics industry with global expertise in static mixing, melt cooling, and microcellular foaming technologies.
P1 Cooling Mixer Technology
The Promix P1 cooling mixer is a combination of a high-capacity polymer cooler and a static mixer. The system enables highly efficient heat transfer directly within the melt through cooling media flowing inside hollow mixer bars.
Key performance features:
• Excellent temperature homogenization across the entire flow cross-section
• Very narrow residence time distribution
• Extremely high cooling capacity
• Precise outlet temperature control
• Minimization of deposits and fouling
• Ability to achieve very low melt temperatures without risk of freezing
These characteristics ensure stable processing conditions even for high-viscosity polymers.
Technical Design and Parameters
The Promix P1 cooling mixer is engineered for demanding extrusion environments:
• Nominal pressure: 250 bar
• Design temperature: 300°C
• Material: 1.4571 stainless steel
• Temperature and pressure sensor ports at inlet and outlet
• Ready-to-install configuration with customized adapters
• Optional surface treatments and temperature control unit
This technical design ensures high operational safety and long service life.
Line Capacity and Production Performance
The maximum output of extrusion lines is often limited by cooling capacity and tolerance boundaries. The P1 cooling mixer expands these limits:
• Increased line capacity
• Stable melt temperature even at higher throughput
• Reduced cooling line length requirements
• Maintained product tolerances and surface quality at high speeds
• Faster start-up times
• Reduced scrap rates
As a result, production efficiency and process stability are significantly improved.
Foam Extrusion Applications
The P1 cooling mixer is a critical process component for low-density foam production:
• Optimization of foam cell structure
• Reduction of foam density
• Increased line capacity
• Consistent foam quality through stable melt temperature
The system can be positioned between primary and secondary extruders or directly before the die to enhance overall process performance.
Cooling Performance Data
Testing in PET applications demonstrates that the P1 100 model maintains stable outlet melt temperatures across different throughput levels.
In HDPE applications, outlet melt temperature can be precisely controlled across a wide operating range depending on the set oil temperature.
Performance graphs confirm stable and high heat transfer efficiency at varying mass flow rates.
Installation and System Integration
Promix P1 cooling mixers can be integrated into various extrusion configurations:
• Between extruder and die
• In transfer lines
• In tandem extrusion systems
• In foam extrusion lines
Installation examples include XPS packaging film, insulation boards, and PP/PS foam sheet production.
Maintenance and Cleaning Advantages
Promix static mixer and P1 cooling mixer systems can be efficiently cleaned using vacuum thermal cleaning methods:
• Controlled cleaning process below 450°C
• Processing time between 2-6 hours depending on component size
• Carbonization and removal of organic polymer residues
• Final cleaning using compressed air
• Safe maintenance without water or abrasive blasting
This method extends equipment lifetime and improves process reliability.
Why Promix Melt Cooling Technology?
• Integrated static mixing and cooling technology
• High heat transfer efficiency
• Low pressure drop
• Uniform temperature distribution
• Improved process stability and product quality
• Ideal solution for foam extrusion applications
Promix melt cooling systems place temperature control at the center of extrusion process management, enabling manufacturers to achieve higher production capacity, more stable product quality, and lower operating costs.
