Hot Melt Adhesive Compounding

With stiffening environmental regulations, pressure-sensitive adhesive users are switching from solvent-based to hot-melt systems. NFM’s twin-screw hot-melt extrusion technology makes it possible to save up to one-third the cost of the adhesive by compounding in-house. Our twin-screw mixing process, offers a higher melt quality and better process control than can be achieved in a single-screw process.

NFM offers proven solutions for hot-melt extrusion of both solid (pellet/flake) resins via traditional loss-in-weight feeders, as well as molten resins through our advanced molten resin feeding systems.

Typical Polymers & Applications

• SIS Based Hot Melt Adhesives
• EVA Based Hot Melt Adhesives
• Acrylic Adhesives

Compounding Flexibility

• NFM’s TEM Series co-rotating, intermeshing twin screw extruders offer ideal shear and mixing properties to hot-melt adhesive compounds.
• NFM’s WE Series counter-rotating, tangential screw design provides thorough mixing of resins with a wide range of viscosities and melting temperatures, designed to generates high shear without high temperature to protect heat sensitive resins.

Multi-Stage Feed

• Eliminates the need for pre-blending then high-melt viscosity polymers are introduced first and extruded into a uniform state by the twin-screw action.
• Low-viscosity materials, which can be pre-melted if desired, are added downstream.
• Oil can be injected into the barrel of the compounder in a final stage.
• Continuous compounding action of the twin-screw mixing process improves quality control and produces a uniform hot-melt adhesive.

Short Resident Time

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

Low Operating Cost

• NFM’s hot-melt adhesive compounding extruders are not labor intensive and utilize adiabatic extrusion for minimum energy cost per pound of product.