Hot Melt Coating Technology
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Transcript of Hot Melt Coating Technology
HOT MELT COATING TECHNOLOGY
BACKGROUND
• Hot Melt Adhesives• Process Techniques• Equipment Systems
• Consistent• Streak-free• High Speed
HOT MELT ADHESIVES
• Polymeric Materials• Elevated Temperatures• Bond to Substrate• PSA
o gels
• versus Solvent
HOT MELT PROCESS
• Adhesive Mixing/Mastication• Melting/Pumping• Coating Head• Curing• Web Handling & Controls
LIMITATIONS
• Speed3280 feet/min (1000 meters/min)
• Thin0.5 mil (0.0127 mm)
TECHNOLOGY AND TECHNIQUE
• Hot Melt Adhesive Rheology• Technology
o Coating Heado Backing Rollo Adhesive Delivery Systemo Substrateo System Control
• Technique
HISTORY
• from Compliant Rubber Roll • to Chrome Roll
o Relationship between die and rollo Thinner coatings & gels
• to Rubber Roll
TECHNOLOGY AND TECHNIQUE
• Rubber Roll Technologyo TIR < 0.0003 inch (0.00762 mm)o Cylindricity < 0.0005 inch (0.0127 mm)o “Compliant Steel”o 80-90 Shore A Durometer
Rubber Roll Technology
TECHNOLOGY AND TECHNIQUE
TECHNOLOGY AND TECHNIQUE
• Rotary Rod Die Technologyo Gel passage through physicso Roll deflection up to 1 mil (0.0254 mm)o Slip creates streak-free coating
TECHNOLOGY AND TECHNIQUE
• Adhesive Delivery Systemo Constant, pulse-free deliveryo Stable temperature
• Web Control Systemo Tensiono Process Speedso Chatter control
CONCLUSION• Best Techniques
+• Good Technology
=• Best Product
Thinner, Faster, and the State of the Art
• Rotary Rod Die and Rubber Backing Rollo Precision of manufacturingo Adhesive Memory