Process requirements and material challenges
Adhesives and sealants can combine high viscosity, fillers, pigments and moisture-sensitive components. The central question is not simply mixer volume: torque, agitation pattern, wall and bottom sweeping, discharge behavior, temperature management and vacuum deaeration all influence a workable process.
A useful selection brief identifies the viscosity range throughout the batch, ingredient addition sequence, filler loading, desired dispersion quality, batch cycle time and any solvent or hazardous-area constraints.
Typical production route
Charging and initial wet-out
Introduce liquid resin or binder and dry ingredients in the intended sequence so fillers are incorporated without persistent dry zones.
High-viscosity mixing
Planetary or double-shaft mixing can be assessed against the required shear, circulation, torque and batch size.
Vacuum, discharge and filling
Where air entrainment is critical, vacuum deaeration and an appropriate discharge method should be included in the process review before packaging.
Recommended equipment
POLYC mixers are evaluated from the actual rheology and batch workflow. The models below represent relevant equipment families for high-viscosity processes.
Planetary Mixer
The planetary mixer is specially for material with high viscosity up to 1,500,000 cP It is a highly efficient, multi-purpose equipment integrating reaction, mixing and dispersion; The stirring paddle in the kettle orbits and rotates simultaneously, so that the material flows up and down and around, so as to achieve the mixing effect in a very short time, there is no dead angle in the mixing process and the effect is more than ten times that of the ordinary mixer. Actual mixing performance depends on the formulation, fill level, tool geometry, and validated process settings.
View Planetary Mixer Details →Butterfly Double Shaft Mixer
Our PM Butterfly Double Shaft Mixer is high-efficiency dispersing and mixing equipment consists of the butterfly agitator with scrapper and high-speed disperser, two sets of agitators working at the same time, mixing the material rapidly under the action of strong shearing and mixing force. The double shaft mix can customize according to different viscosity, density and products formulation, different agitators.
View Butterfly Double Shaft Mixer Details →Selection checklist
| Decision point | What to confirm before quotation |
|---|---|
| Rheology | Viscosity range, thixotropy, filler loading and temperature sensitivity. |
| Batch workflow | Charge order, mix time, vacuum requirement, discharge method and cleaning frequency. |
| Materials and safety | Contact materials, seals, solvent compatibility and hazardous-area requirements. |
| Output | Batch size, batches per shift, downstream transfer and filling interface. |
Final capacity, equipment configuration, contact materials, seals, cooling duty and control scope should be confirmed against the actual formulation and operating conditions. This prevents selection by a headline parameter alone and gives the project team a defensible basis for pilot work or production scale-up.
View all Adhesives & Sealants products →
Frequently asked questions
What mixer is suitable for high-viscosity adhesives?
Planetary and double-shaft mixer configurations are commonly evaluated. The choice depends on rheology, filler loading, batch volume, dispersion target and discharge method.
Is vacuum mixing necessary?
Vacuum can help reduce entrained air where it affects product density, appearance or dispensing. Its suitability depends on the formulation and workflow.
Can the line be customized?
Yes. Vessel size, contact materials, controls, vacuum, heating or cooling and discharge integration can be reviewed for the process.