• Devolatizilation of Polymer Solutions:
  
  

  In the field of polymer devolatilization, NFM/Welding Engineers holds an impressive array of experience and accomplishments that include:

• patented multi-stage venting
• rear venting
• counter-current and co-current stripping
New products include:
• streamlined preconcentration systems that maximize output and quality of solution polymers.
• large-scale processing techniques for extrusion drying of elastomer solutions.
• Reactive Processing:
  

  NFM/Welding Engineers has been building equipment for the finishing and primary manufacture of emulsion, bulk, and solution polymers ever since polymer manufacturers began using twin screw devices for such purposes. Over time, we have developed the technology to handle the large amounts of solvent, water, or vapor that comes out of the reactor with the polymer. We are the only equipment manufacturer with the technology to finish polymers commercially from emulsion, solution or slurry in a single machine.
  It was a natural extension of our expertise in handling reactor products to perform the reactions themselves in our extruders. For reactions to proceeed to completion in a controlled manner requires certain residence time, heat transfer, and mass transfer characteristics. NFM/Welding Engineers' extruders offer optimum conditions in all three areas and our technical team can provide ready solutions to limitations in reactive extrusion process development.

• Isolation of Emulsion Polymers:
  

  With over 20 years of experience in direct latex extrusion (emulsion conversion) processes, NFM/Welding Engineers is uniquely qualified and fully equipped to help you achieve superior product results, optimize operations, and reduce expenses. Our counter-rotating, non-intermeshing twin screw extruders have been proven to be ideal process machines for latex coagulation applications.
  
  

  Latex Coagulation Thermoplastics

  Latex Coagulation Elastomers

• Hot Melt Adhesive Compounding Extruder:
  

  Continuous twin-screw mixing enhances the quality of hot melt pressure-sensitive adhesives.
  As enviromental regulations continue to mount, more and more pressure-sensitive adhesive users are switching from solvent based to hot melt systems. By making this change, many are finding they can compound their own materials, offering them significant cost savings.
  
  In fact, it is possible to save up to 1/3 the cost of the adhesive by compounding on a NFM/Welding Engineers' Twin Screw Extruder.
  
  This savings is achieved through the twin screw mixing process, which offers a higher melt quality and process control than can be achieved in a single screw process.

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