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LOCTITE HHD 3593

  • Item Name: LOCTITE HHD 3593
  • Manufacturer: Henkel
  • Product category: Hot Melt Adhesive
  • Technologies: Polyurethane Hot Melt (Reactive polyurethane)
  • Applications: Ideal for device assembly in automated or manual production lines.
  • Color: Black Solid
  • Cure type: Solidification and Moisture
  • Package size: Contact to Avantek for details
  • Shelf life: 365 days

1. Product Overview

LOCTITE HHD 3593 is a black polyurethane hot melt adhesive that cures with moisture. It is designed for device assembly, offering a long open time and high handling strength immediately after bonding. This one-part adhesive requires no mixing.

2. Applications

  • Used in device assembly
  • Suitable for automatic and manual assembly lines

3. Typical Properties

Property Value
Appearance Black Solid
Technology Polyurethane Hot Melt
Solids Content 100%
Components One part (no mixing required)
Curing Method Solidification & Moisture
Viscosity (100°C, mPa·s) 5,400 (Brookfield – Thermosel)
Density @ 25°C (g/cm³) 1.1
Shelf Life @ 5-25°C (days) 365
Flash Point See SDS

4. Curing Performance

Parameter Value
Open Time @ 25°C (minutes) >6
Preheating Schedule 20 – 30 mins @ 100°C
Application Temperature (°C) 100 – 110
Final Strength Development 1 – 5 days (moisture-dependent)

Curing is influenced by:

  • Humidity in the environment
  • Moisture content of substrates
  • Substrate permeability
  • Adhesive layer thickness

5. Performance After Curing (Tested at 23 ±5°C, 50 ±5% RH)

Test Condition Adhesion Strength (N/mm²)
Tensile Adhesion (Glass to Steel) After 1 hour 0.819
After 24 hours 2.42

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