How To Choose The Right Overmoulding Materials

ovemoulding materials - Henkel Technomelt PA 6208 Black

Henkel Technomelt® PA 6208 Black

Applications: Electronics which includes circuit boards, electronic components, sensors & control systems, in outdoor & indoor environments.

ovemoulding materials - Henkel Technomelt PA657 Black

Henkel Technomelt® PA 657 Black

Applications: Automotive exterior and white goods

ovemoulding materials - Loctite PA 6732 Amber

Loctite® PA 6732 Amber

Applications: Medical devices such as connecting flexible hoses for fluid supply.

ovemoulding materials - Henkel Technomelt PA2302 Black

Henkel Technomelt® PA2032 Black

Applications: Mulitple uses with the automotive industry

ovemoulding materials - Henkel Technomelt PA6481 Black

Henkel Technomelt® PA6481 Black

Applications: Suitable for outdoor moulding applications

ovemoulding materials - Henkel Technomelt PA678

Henkel Technomelt® PA678 Black

Applications: Automotive under bonnets

ovemoulding materials - Henkel Technomelt PA6208 amber

Henkel Technomelt® PA 6208 Amber

Applications: Used for general assembly work

ovemoulding materials - Henkel Technomelt PA673 amber

Henkel Technomelt® PA673 Amber

Applications: Automotive under bonnets


Loctite® PA 6682

Applications: Encapsulate medical devices including catheters, tube sets, connectors & surgical tools

Materials Evaluation

Each substrate on any part to be overmoulded has its own specific attributes. Teflon, for example; fundamentally resists adhesion. However, other materials like nylon, abs or polypropylene all have varying degrees of adhesion compatibility.

Whatever the characteristics of the substrate, there is always a Henkel Technomelt® product to suit it. PCBs in GR4 or G10 are different from flexi-circuits so the application needs to be understood in order to specify the most suitable product.

Along with this application analysis, the environmental requirements such as heat and chemical resistance need to be known in order to identify the correct specific Technomelt variant. Once these parameters are known, by using the Overmould application check list above, then the evaluation of the overmoulding can begin.

Which materials to avoid!

Plastics that are not polyamides become troublesome in hot-melt low pressure moulding applications. Henkel Technomelt® have been specifically designed and formulated to provide the right viscosity at the correct operating temperatures for Low Pressure Moulding (LPM).

Most plastics used in injection moulding with High Pressure Machines cannot be used in LPM due to the extremely high viscosities that need high pressures to force the material into the mould tool cavity.