Applications

Bostik Thermelt 861 HV Black Polyamide Hot Melt Resin

Brand: Bostik
Product Number: Thermelt 861 HV Black
Technology: Polyamide Hot Melt Resin
Color: Black
Cure Type: Low-Pressure Molding
Package Size: Pellets
Shelf Life: 18 months

Product Description

Bostik Thermelt 861 HV Black is a pure copolymer polyamide hot melt resin developed for low-pressure molding applications. It is non-reactive, solvent-free, and designed for encapsulation of electronic and electrical components. This adhesive provides high flexibility, toughness, and excellent dielectric strength, ensuring protection against mechanical stress and environmental exposure. It complies with RoHS regulations and contains no phthalates.

Key Features

  • Low-pressure molding for delicate components
  • High flexibility and impact resistance
  • Flame retardant (UL94 V-0 certified, UL file E116659, in progress)
  • Good electrical insulation properties
  • Solvent-free and moisture-resistant formulation

Recommended Applications

  • Encapsulation of electronic/electrical components
  • Molding of connectors and cables
  • Industrial applications requiring impact resistance and flexibility

Technical Data

Physical Properties
Property Value Standard Test
Viscosity (200°C, SC4, 10 RPM) 10.0–14.0 Pa.s ASTM D3236
Softening Point 155–166°C ASTM D3461
Commercial Shape Pellets
Mechanical Properties
Property Value Standard Test
Yield Strength (50 mm/min, dry) 4.1 MPa ISO 527
Maximum Tensile Strength (50 mm/min, dry) 5.4 MPa ISO 527
Young’s Modulus (50 mm/min, dry) 31 MPa
Elongation at Break (50 mm/min, dry) 500% ISO 527
Electrical Properties
Property Value Standard Test
Dielectric Strength IEC 60243-1
Volume Resistivity IEC 60093
Comparative Tracking Index (CTI) IEC 60112
Thermal Properties
Property Value Standard Test
Molding Shrinkage (Normal, Parallel) ISO 294-4
HDT (0.45 MPa) ISO 75-1/-2
Vicat Softening Temperature (A120) 36°C ISO 306
Glass Transition Temperature -30°C ISO 11357-2
Miscellaneous Properties
Property Value Standard Test
Hardness (Shore D) 22 ISO 868
Density 0.98 ISO 1183
Water Absorption (Saturation, 23°C) 2.8% ISO 62
Glow Wire Flammability Index (GWFI)
Glow Wire Ignition Temperature (GWIT)
Flammability (UL94) V-0 (In progress) UL file E116659

Processing Conditions

Parameter Value
Melt Temperature Range 210–230°C
Mold Temperature Range 20–60°C
Drying Time (Dehumidified Dryer) 4–6 hours
Drying Temperature 70°C
Processing Moisture Content <0.2%

Everwide FX244-1: High Performance for Precision Molding

FX244-1 A specialized two-part silicone rubber designed for creating high-precision molds. This material features a unique oil-bleeding property that creates a self-releasing surface, eliminating the need for external non-stick sprays during demolding.

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