Moulding Materials 2018-05-17T09:56:58+00:00

Overmoulding Materials

Low pressure moulding materials

Our overmoulding services are based on Henkel Corporation’s brand of thermoplastic hotmelt adhesives called Macromelt – or more recently called Technomelt.

This material consistently provides excellent results, as our electronics team create high quality, durable overmoulding projects using Henkel Corporation technology.

Characteristics of macromelt

While there are a number of alternatives, we have chosen to work closely with the compounds from Henkel Corporation because this method provides a cost effective, reliable product that offers superior sealing while consistently creating projects to a high quality with a positive effect on the environment.

Macromelt thermoplastic hotmelt adhesives are based on natural fatty acids. They show good adhesion to plastics like PA6.6, ABS and PVC, and have low temperature flexibility with a wide service temperature range.

Offering superior overmoulding properties, each grade of material is also available in both amber and black. Some bespoke colours are available, please contact us to discuss your requirements.

Key considerations

Moisture and solvent resistance requirements will be key factors in selecting a specific grade of material – the softer materials generally offer the best adhesive properties. It is also important to be aware that most Macromelt moulding materials do not have good resistance to solvents in combination with mechanical stress.

But you don’t need to worry, we’ll be there for you offering our manufacturing guidance and expertise to support you across the entirety of the project. Leave the details to us.

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Low Pressure Moulding Materials
Low Pressure Moulding Materials
Low Pressure Moulding Materials

Macromelt/Technomelt® Material Data Sheet

MaterialTestOM 652OM 6208OM 633OM 641OM 673
PropertiesMethodOM 657OM 6208SOM 638OM 646OM 678
Color amber/black amber/black amber/black amber/black amber/black
Physical
Specific gravity, S.G. 0.98 0.98 0.98 0.98 0.98
Service Temperature, °C -40 to +100 -40 to +100 -40 to +130 -40 to +130 -40 to +140
Viscosity @ +210C ( mPa.s ) 4000 3000 3500 7000 3000
Hardness @ 25°C, shore AISO 868/15S 77 78 90 92 88
Hardness @ 125°C, shore AISO 868/15S N/A N/A 65 63 63
Softening point, ball & ring, °CASTM E28155 +155 +175 +175 +185
Cold Flexibility °CASTM D3111 -45 -42 -36 -35 -50
Moulding temperature, °C 180 to 230 190 to 230 200 to 240 210 to 240 210 to 240
Viscosity @ 210° C, mPasASTM D3236 4100 3600 3700 7000 3400
Electrical
Dielectric constant @ 1kHz 6.2 / 6.3 6.1 / 6.3 4.5 / 4.7 5.1 / 5.5 4.9 / 4.9
Volume resistivity, Ohm cm 1.9×10¹² 1.9×10¹² 1.9×10¹² 1.9×10¹² 1.9×10¹²
Dielectric strength, kV / mm >20kV/mm >20kV/mm >20kV/mm >20kV/mm >20kV/mm
Flammability ratingUL94 File E182771V-0 V-0 V-0 V-0 V-0
Special Properties Good cold flexibility RTI value for 6208S 95C
Adhesion Properties
Substrate Type
PA6.6GoodGoodModerateModerateModerate
PVCGoodGoodGoodExcellentGood
ABSGoodGoodModerateModerateModerate
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