Applications

LOCTITE® HHD 3622BK – Polyurethane hot melt adhesive for structural bonding in electronics and devices

Item Name: LOCTITE® HHD 3622BK
Manufacturer: Henkel
Technologies: Polyurethane Hot Melt
Color: Black Solid
Cure Type: Solidification and Moisture
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.

1. Product Overview

LOCTITE® HHD 3622BK is a one-component, reactive polyurethane hot melt adhesive in black solid form. It cures by solidification and moisture, offering jettable PUR capability, low modulus, and gap-filling ability. Designed for robotic jetting and automatic assembly, it provides strong initial bond strength immediately after solidification, with secondary moisture cure providing excellent elongation and structural durability. Once fully cured, it does not remelt.


2. Applications

  • Structural adhesive for electronics

  • Electronic device assembly

  • Robotic jetting or automatic assembly line applications

  • Substrates requiring high elongation and structural durability

3. Typical Properties

Uncured

Property Value
Technology Polyurethane hot melt
Appearance Black solid
Components One part – no mixing required
Viscosity @ 110 °C, Brookfield Thermosel 6,500 mPa·s
Solids Content 100 %
Open Time @ 25 °C ≥ 3 min
Preheating Schedule 20–30 min @ 110 °C
Application Temperature 100–220 °C
Cure Schedule 7 days @ 25 °C

Cured

Property Value
Elongation 684 %
Modulus 39 N/mm²
Transmittance, 0.2 mm @ 550 nm 0.01 %
Cross Tensile Strength (PC 3200 to Ink Glass) 2 h: 1.5 N/mm²; 24 h: 5 N/mm²
Lap Shear Strength (PC 3200 to PC 3200, 24 h) 10.4 N/mm²

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