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LOCTITE® HHD 3544F – Polyurethane Reactive Hot Melt Adhesive – Consumer Electronics Structural Bonding

  • Item Name: LOCTITE® HHD 3544F
  • Manufacturer: Henkel
  • Product Category: Hot Melt Adhesive
  • Technologies: Polyurethane Hot Melt
  • Applications: Structural adhesive, electronic structural bonding
  • Color: Beige
  • Cure Type: Moisture cure
  • Package Size: Contact Techniq VN for details

1. Product Overview

  • Technology: Polyurethane Hot Melt
  • Appearance: Beige solid
  • Odor: Slight
  • Solids Content: 100%
  • Cure Mechanism: Moisture cure
  • Bio-based Content: 60%
  • Key Features:
    • Good bonding performance
    • Long open time for assembly line production
    • High handling strength instantly after bonding

2. Applications

  • Structural Adhesive – Suitable for bonding applications in electronics and general structural bonding.
  • Ideal for automatic or manual assembly line production.

3. Typical Properties

Uncured Material
Property Value
Viscosity @ 110°C (mPa·s) ~5,000
Density @ 25°C (g/cm³) 1.1
Curing Performance
Property Value
Open Time @ 25°C (min) 4
Preheating Schedule @ 110°C 20-30 min
Application Temperature (°C) 90-120
Cured Material
Property Value
Tensile Modulus (MPa) 190
Tensile Strength (MPa) 11
Elongation at Break (%) 1,070
Cross Tensile Strength (PC/SUS, 24h, MPa) >3

4. Storage & Handling

  • Storage Temperature: 18 to 26°C
  • Minimum Transport Temperature: 10°C
  • Keep containers sealed and store in a dry environment.
  • Do not return used material to the original container.

5. Application Guidelines

  • Ensure bonding surfaces are clean, dry, and free of grease.
  • Substrate temperature should not fall below 20°C during application.
  • Apply using heating cartridge guns or syringe-type melting equipment.
  • For long rest periods, reduce the melting and application temperature to avoid viscosity increase.

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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