HOT-MELT ADHESIVES

A customised solution for any challenge

When it comes to successfully producing and compounding hot-melt adhesives, there are several decisive factors: the targeted meltability of different formulation components, extremely short compounding times of just a few minutes, an extruded material of constant homogeneity, a low-shear and material-friendly compounding process, and effective cooling over a short distance.

• Targeted melting of various formulation components

  It is efficient: substances with different properties can be deliberately conveyed into defined temperature zones. In this way, for example, wax can be melted without flocculation or adhesion, something that requires a considerable period of time with other systems.

• Extremely short compounding times of just a few minutes

  The throughput times in the Planetary Roller Extruder are comparatively short. The result: the material is only subjected to mechanical and thermal stress for a brief period.

• Stable homogeneity of the extruded material

  The outstanding mixing and effective tempering in the Planetary Roller Extruder ensure that the homogeneity and viscosity of the extruded material remain constant. In this way it is possible to maintain the consistent high quality of the product.

• A low-shear and material-friendly compounding process

  The key is that the adhesive is only subjected to a low mechanical stress thanks to the low-shear and material-friendly compounding process. The targeted, process-oriented input of energy in well-coordinated temperature-controlled zones without hotspots ensures that there are no temperature spikes or localised overheating of the material.

• Effective cooling over a short distance

  Effectively cooling the extrudate to the required target temperature/viscosity during the compounding process makes it possible to continue processing the material directly without any additional tempering processes.

• Dispensing with discontinuous intermediate work processes

  It is also more cost-effective: compounding in a continuous process with a single heat level offers economic benefits compared to discontinuous production processes. Energy costs are lower on account of the reduced number of heating and cooling steps.

• Eliminating batch fluctuations

  Batch fluctuations – something that can occur with the discontinuous compounding of adhesives – are eliminated by the continuous processes made possible by the Planetary Roller Extruder. The result: significantly more consistent product quality.

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