NFM/Welding Engineers has been building reactive extrusion equipment for the finishing and primary manufacture of emulsion, bulk, and solution polymers since twin-screw devices were first used for such purposes. Our technology allows us handle the large volumes of solvent, water, or vapor exiting the reactor and to finish polymers commercially from emulsion, solution, or slurry in a single machine.

Our technical expertise has naturally expanded to handling reactor products and performing the reactions themselves in our extruders.

NFM’s WE Series and TEM Series extruders offer optimum conditions in carefully controlled residence time, heat transfer, and mass transfer. Our technical team can provide ready solutions to limitations in reactive extrusion process development.

Two Proven Technologies
WE Series
TEM Series
Counter-Rotating, Non IntermeshingCo-Rotating, Intermeshing
Longer possible L/D for increased residence timeTypically standardized L/D capabilities
Distributive mixing throughout the extruderDistributive mixing only in designed areas
Reduced dispersive mixingOutstanding dispersive mixing where designed
Excellent surface renewal of polymer flowExcellent self-wiping of all screw surfaces
Synthetic Rubber

WE Series

Reactive Extrusion

WE Series

Polycondensation Reaction

TEM Series

Thermoplastic Vulcanizates (TPV)

The Advantages of NFM / Welding Engineers Twin-Screw Extruders

Excellent Heat Transfer Characteristics:

In reactive processing, thermal gradients at any point in the extruder can give a variable rate reaction or even promote the wrong reaction. Aside from traditional conductive cooling, for high viscosity fluids, NFM/WE can apply its direct inert fluid contact technology which avoids thermal gradients that accompany any conductive cooling mechanism.

Excellent Mass Transfer Characteristics:

Mass transfer in highly viscous fluids is often rate limiting in a reaction. NFM/WE has the experience to establish rapid intimate contact of the reactants, regardless of whether the mass transfer is between a melt and a liquid, a melt and a vapor, two melt streams, or a crumb and a liquid or vapor.

Our devolatilization technology can be readily applied to polycondensation reactions or any melt vapor mass transfer operation. Our mixing processing technology promotes contact between co-continuous insoluble phases. The continuous reorientation mechanism provides excellent distributive mixing of multiple melt phases.

Excellent Residence Time Characteristics:

Our non-intermeshing twin-screw design allows us to operate at higher throughput or longer residence time than competitive designs.

Proven Technology for:
Grafting reactions of Polyolefins
– w/Maleic Anhydride
– w/Acrylic Acid
Grafting Reactions of EP Rubber
Imidization of Acrylics
Condensation of Silicones
Anionic Polymerization of nylon 6
Dynamic Vulcanization of Polyethylene (silane crosslinking)
TPV

Learn more about the TEM Series

Co-Rotating Intermeshing Twin Screw Extruders

Learn more about the WE Series

Counter-Rotating Non-Intermeshing Twin Screw Extruders

TEST YOUR APPLICATION WITH
NFM’S PROCESS DEVELOPMENT LAB

OUR INNOVATIVE EXTRUSION TEST PILOT PLANT ALLOWS OUR CUSTOMERS TO PERFORM LAB-SCALE DEVELOPMENT AND SMALL PRODUCTION RUNS TO SIMULATE ACTUAL FIELD PRODUCTION CONDITIONS.
FOR MORE INFORMATION, CALL US AT 330-837-3868 OR FOR INFORMATION REGARDING A SPECIFIC PRODUCT OR APPLICATION CLICK HERE.

         NFM Dalian logo

NFM /  Welding Engineers, Inc. is a leading global OEM for rubber and plastics extrusion systems. NFM offers full turnkey extrusion systems featuring custom-integrated controls and the highest level of extrusion technology and performance. As the leader in extrusion system design, manufacturing, support and service, NFM is your best resource for reliable extrusion performance.

learn more

Locations

NFM Locations

Contact Us

Thank you for your interest in NFM. Please contact us using the information below. For information regarding a specific product or application, click here.

  •  577 Oberlin Road, Massillon, OH 44647-7899
  •  1.330.837.3868

Social

© NFM / Welding Engineers, Inc. | Site Map