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