Hot Melt Adhesive Compounding
Lines for EVA- and TPU-based hot melt adhesives. The viscosity of the melt decides how it is formed: below 4,000 cPs it is dropped as pastilles onto a cooling belt; above 4,000 cPs it is compounded on a twin screw and cut underwater.
- EVA base
- TPU base
- Dropform pastillator
- Underwater pelletizing
Two adhesive bases
EVA-based adhesives are tackified with rosin and wax; TPU-based adhesives are blended with other polymers.
4,000 cPs decides the line
A thin melt cannot be cut into pellets; it is dropped into pastilles and cooled on a belt. A thicker melt is compounded and cut underwater.
Dropform pastillator system
- Distributor
- Belt cooling
- Bucket elevator
- Packing
- The melt is dropped as pastilles onto a steel cooling belt.
- The same system works for any additive that melts below 100 °C, such as wax.
Twin screw + underwater pelletizing
- Loading
- Feeding
- Twin screw
- Melt filter
- Melt pump
- Underwater pelletizer
- Dewater
- Classifier
- Convey & store
- Compounded on a twin screw extruder, filtered and pressurised by a melt pump, and cut at the die face under water.
Get a quote
Tell us the adhesive base (EVA or TPU), the formula, the melt viscosity at your processing temperature and the output you need. We will tell you whether a pastillator or a twin screw line with underwater pelletizing fits, and size it.
- 01Base, formula & viscosity
- 02Pastillator or twin screw
- 03Cooling, classifying & packing
Souder Chen
Head of Compounding Division
With USEON since 2008. Twin screw compounding, devolatilization and recycling lines.