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.
Adhesive and Silicone Sealant Production Line
Adhesive & Silicone Sealant Production Line: High-Viscosity Mixing Through to Filling
View Adhesive and Silicone Sealant Production Line Details →Planetary Mixer
Planetary mixer for viscosities up to 1,500,000 cP, combining reaction, mixing and dispersion in one vessel. Working capacity: 2-1,000 L.
View Planetary Mixer Details →Powerful Three Shafts Agitator
Three shaft agitator is a powerful mixing machine with high-efficiency, multifunction. It is the main equipment for glass glue, and widely used in the
View Powerful Three Shafts Agitator Details →Vacuum Dispersing Machine
High-speed disperser with vacuum system for defoaming. Capacity: 50-10,000 L.
View Vacuum Dispersing Machine Details →Butterfly Double Shaft Mixer
Butterfly agitator plus high-speed disperser for efficient shear mixing of high-viscosity pastes and sealants. Capacity: 100-12,000 L.
View Butterfly Double Shaft Mixer Details →Concentric Double Shaft Mixer
Scraper agitator with concentric high-speed disperser; frame, half-frame and multi-disc options. Capacity: 100-12,000 L.
View Concentric 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.
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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.