Gala Systems for HMA Production are designed to be cost effective at pellet rates from 9 - 4000 kg/h
(20 - 8,800 lbs/hr). The typical Gala HMA production system will include:
• Vessel
• Melt Pump
• Screen Changer
• Static Mixer Heat Exchanger (Melt Cooler)
• Polymer Diverter Valve
• Water Box By-Pass
• Underwater Pelletizer
• Tempered Water System
• Centrifugal Dryer
• Electrical/Control System
All components are chosen and sized around each Customer’s application requirements.
Underwater pelletizing of hot melt adhesives produces very good results for all variants.
Hot melt adhesives are easy to handle - no processing problems are to be expected.
Hot melt adhesives are easy to pelletize in the ball shapes and sizes demanded by the market.
Advantages
The advantage of underwater pelletizing in this field is the good cooling of the pellets in the water flow. The floor space requirements are low since cooling of the pellets takes place in long pipes. Since also cold water can be used, surface tack can be fully eliminated.
Underwater pelletizing produces ball-shaped pellets that do not have any linear adhesion surfaces even after leaving the water flow, as are known from standard cylindrical pellets.
Gala systems permit the pelletizing of hot melt adhesives of a viscosity as from 3,000 mPas.
Reasons for preferring a Gala underwater pelletizing system:
• Low capital expenditure
• Low space requirements
• Low energy costs, cost-efficient water preparation since
• pellets can be discharged at >90°C
• Low tooling costs
• Fully automatic design
• Low sound pressure level < 80 db(A)
For these applications, pelletizing systems are available for installation downstream of extruders but also for use with mixers and kneaders with melt delivery pumps.
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