Henkel Technomelt PA 641 High Strength Polyamide Hot Melt Adhesive

Technomelt PA 641 for High Performance Low Pressure Molding Applications

Technomelt PA 641 is a high-strength thermoplastic polyamide hot melt adhesive engineered for low pressure molding applications. It delivers increased hardness and mechanical performance while maintaining excellent elongation for durable encapsulation. The material processes efficiently to protect fragile components during molding and solidifies into a resilient thermoplastic barrier after cooling. With balanced high and low temperature performance, it provides reliable protection in demanding industrial environments.

Features of Technomelt PA 641 Polyamide Hot Melt

• Enhanced Structural Performance: Delivers increased strength and rigidity for durable molded assemblies.
• Balanced Hardness and Flexibility: Combines a firm material profile with high elongation to absorb stress without cracking.
• Wide Temperature Reliability: Maintains performance in both low and elevated temperature environments.
• Resilient Thermoplastic Barrier: Solidifies into a tough protective layer that shields sensitive components.
• Optimized for Low Pressure Molding: Processes efficiently to encapsulate fragile parts without damage.

Technical Specifications

• Series: Technomelt PA 641
• Type: Hot Melt Adhesive
• Application: Molding
• Chemistry: Polyamide
• Components: One-Component
• Cure: Physical Setting
• Color: Amber
• Application Temperature: 392 – 464°F (200 – 240°C)
• Operating Temperature Range: -40 – 266°F (-40 – 130°C)
• Softening Point: 338 – 356°F (170 – 180°C)
• Melting Viscosity:
• 7,000 cps @ 410°F (210°C)
• 5,000 cps @ 428°F (220°C)
• 3,500 – 5,500 cps @ 437°F (225°C)
• 3,500 cps @ 446°F (230°C)
• Density: 0.98 g/cm³ @ 68°F (20°C)
• Shore A Hardness: 92
• Yield Strength: 725 psi (5.0 N/mm²)
• Break Strength: 1,305 psi (9.0 N/mm²)
• Elongation: 650%
• Temperature Creep Resistance: 311°F (155°C)
• Low Temperature Flexibility: -22°F (-30°C)
• Glass Transition (Tg): -22°F (-30°C)
• Shelf Life: 24 Months (when properly stored)