NFM/WE's counter-rotating, tangential screw design provides thorough mixing resins with a wide range of viscosities and melting temperatures. This design generates high shear without high temperature to protect heat sensitive resins.

NFM/WE's multi-stage feed design eliminates the need for pre-blending, while assuring uniform fluxing of high-melt viscosity polymers. These polymers are introduced first and extruded into a uniform state by the twin-screw action. The low-viscosity materials, which can be pre-melted if desired, are added using the multi-stage feed. In the final stage, oil is injected into the barrel of the compounder. The continuous compounding action of the twin-screw mixing process improves quality control and produces a uniform hot-melt adhesive.

Twin-screw mixing virtually eliminates the crosslinking of polymers that occurs during batch processing when high temperatures are maintained over extended periods. Residence time is often no longer than 15 seconds.

NFM/WE's Hot Melt Adhesive Compounding Extruders are not labor intensive and utilize adiabatic extrusion for minimum energy cost per pound of product. Four models are available - with 2", 2.8" 3.5" and 4.5" screw diameters - so you can select the size best suited to your specific operating requirements.