Henkel Technomelt PA 653 High-Performance Polyamide Hot Melt Adhesive

Technomelt PA 653 for Reliable Low Pressure Molding Performance

Henkel Technomelt PA 653 is an amber polyamide hot melt adhesive engineered for low pressure molding of electronic components. Its low viscosity allows fragile assemblies to be encapsulated with minimal stress during processing. The material delivers excellent adhesion and maintains stability during prolonged exposure to moisture and demanding environmental conditions. Designed for dependable performance, it supports long-term protection of electronics in a wide range of applications.

Technical Advantages of PA 653 for Electronic Molding

• Excellent Adhesion Strength: Bonds reliably to a variety of substrates used in electronic assemblies.
• Moisture-Resistant Stability: Maintains performance during prolonged exposure to humidity and environmental stress.
• Low Viscosity Flow Profile: Enables complete mold fill while minimizing stress on delicate components.
• Broad Temperature Reliability: Maintains consistent performance across both low and elevated operating conditions.
• Flexible, Durable Protection: Combines elongation and resilience to provide effective strain relief and long-term encapsulation integrity.

Technical Specifications

• Series: Technomelt PA 653
• Type: Hot Melt Adhesive
• Application: Molding
• Chemistry: Polyamide
• Components: One-Component
• Cure: Physical Setting
• Color: Amber
• Application Temperature: 356 – 446°F (180 – 230°C)
• Operating Temperature Range: -40 – 212°F (-40 – 100°C)
• Softening Point: 320°F (160°C)
• Melting Viscosity:
• 6,000 cps @ 392°F (200°C)
• 4,500 cps @ 410°F (210°C)
• 3,400 cps @ 428°F (220°C)
• 2,500 cps @ 446°F (230°C)
• Density: 0.98 g/cm³ @ 68°F (20°C)
• Shore A Hardness: 77
• Yield Strength: 406 psi (2.8 N/mm²)
• Break Strength: 464 psi (3.2 N/mm²)
• Elongation: 400%
• Temperature Creep Resistance: 257°F (125°C)
• Low Temperature Flexibility: -58°F (-50°C)
• Glass Transition (Tg): -49°F (-45°C)
• Shelf Life: 12 Months (when properly stored)