Applications

TECHNOMELT® PA 646 BLACK – Polyamide hot melt adhesive for molding, potting, and encapsulation applications

  • Item Name: TECHNOMELT® PA 646 BLACK
  • Manufacturer: Henkel
  • Product Category: Hot Melt Adhesive
  • Technologies: Polyamide, Low-Pressure Molding
  • Applications: Encapsulation and potting of electronics, sensors, FR4, metals, and plastics (ABS, PC)
  • Color: Black
  • Cure Type: Physical setting
  • Package Size: Contact Techniq VN for details
  • Shelf Life: Contact Techniq VN for details

1. Product Overview

TECHNOMELT® PA 646 BLACK is a one-component polyamide hot melt adhesive designed for low-pressure molding applications. It offers excellent moldability, good adhesion to various substrates, and strong environmental and moisture resistance. The adhesive is ideal for encapsulating fragile electronic components due to its low viscosity and minimal molding pressure requirements.

2. Applications

  • Encapsulation of sensors
  • Potting electronic modules
  • Adhesion to substrates such as FR4, pre-heated metals, ABS, and PC
  • Used in low-pressure molding processes

3. Typical Properties

Property Value Test Method
Specific Gravity @ 20°C 0.98 g/cm³ ISO 1183
Softening Point 170 – 180°C ASTM E28
Melt Viscosity (mPa·s) @210°C: 6,500
@220°C: 4,500
@225°C: 3,000 – 5,500
@230°C: 3,000
ASTM D 3236
Shore Hardness (A, 15s) 92 DIN EN ISO 868
Elongation (%) 650 ISO 527
Low Temperature Flexibility -35°C ASTM D3111
Temperature Creep Resistance 155°C Henkel Method MH 11
Tensile Strength at Break 9.0 N/mm² (1305 psi) ISO 527
Yield Strength 5.0 N/mm² (725 psi) ISO 527

Electrical Properties

Property Value Test Method
Dielectric Strength 22 kV/mm IEC 60243
Volume Resistivity 1.7 × 10¹² ohm-cm DIN IEC 60093
Dielectric Constant / Dissipation Factor 1 GHz: 2.73 / 0.021
5 GHz: 2.66 / 0.020
10 GHz: 2.66 / 0.019
50 GHz: 2.62 / 0.007
Open C

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