• Item Name: LOCTITE® HHD 3571BK
• Manufacturer: Henkel
• Technologies: Polyurethane Hotmelt
• Color: Black
• Cure Type: Moisture and solidification
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
LOCTITE® HHD 3571BK is a polyurethane reactive hotmelt adhesive in black color with 100% solids content. It is a one-component system that cures through moisture absorption and solidification, eliminating the need for mixing. This adhesive provides high bonding strength across diverse substrates such as glass with ink, metals, and engineering plastics (PC, PA, PBT). It is formulated for structural bonding and electronic device assembly, offering excellent hot creep resistance, good impact strength, and long-term aging reliability.
Structural bonding in assemblies requiring durability under heat and moisture.
Electronic device assembly, where controlled curing and impact resistance are critical.
Substrates: ink-coated glass, metals, engineering plastics (e.g., PC, PA, PBT).
Suitable for cartridge gun or syringe-type hotmelt dispensing systems.
| Property | Value / Description | Condition / Notes |
|---|---|---|
| Uncured Material | ||
| Density | 1.10 g/cm³ | 25°C |
| Viscosity | 5,300 mPa·s | 110°C, Brookfield Thermosel, Spindle #27, 20 rpm |
| Odor | Slight | – |
| Open Time | ~3 min | 25°C; varies with temp, humidity, substrate |
| Preheating Schedule | 20–30 min | 110°C |
| Application Temp | 100–130°C | – |
| Cure Mechanism | Moisture + solidification | Handling strength after bonding; full cure 1–7 days |
| Cured Material | ||
| Young’s Modulus | 68 N/mm² | ASTM D638 |
| Elongation at Break | 800% | ASTM D638 |
| Peel Creep Resistance | Pass | 65°C / 95% RH |
| Lap Shear Strength | >8.0 N/mm² | PC/20% GF to PC/20% GF, after 72 h |
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