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Hot melt coating technology, technique, and more. For further informative articles visit www.slotdies.com and click on technical content. To receive the most recent articles and blog posts in your inbox please subscribe to our e-mail list.
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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