About resin-to-metal
bonding technology

What is AMALPHA?

Resin-to-metal bonding technology enables metal and resin composites to be handled perfectly as one object.

Features of resin-to-metal bonding technology

Imparts the properties of both metal and resin to components.

This technology enables the manufacture of components that have properties of both metal and resin, using resin where the properties of resin (light weight, electrical insulation, complex geometry, etc.) are required, while using metal where the properties of metal (strength, electrical conductivity, thermal conductivity, etc.) are required.

Reduced parts

Integration of a resin part and a metal part into one piece will reduce the number of parts.

Sealing performance at resin-metal interface

Close bond at the interface between metal and resin prevents air or water leakage at the interface.

Bonding strength exceeding breaking strength of resin

A strong bond is achieved at the resin-metal interface to such an extent that fracture occurs within resin rather than at the interface. Bonding strength is extremely high due to face-to-face bonding.

Improved durability due to adhesive-free construction

The absence of adhesives or other low-durability materials between metal and resin ensures durability until the degradation of resin.

*Resin-to-metal bonding technologies other than AMALPHA may not offer all of these features.

Conventional bonding technologies

Joining by bolts or other fasteners

Fasteners such as bolts and rivets are used to join metal and resin. This technology is free of compatibility issues of joined bodies and achieves high bonding strength. However, it requires through-hole boring for bolts and is not suitable for small parts. Basically, this technology is not meant to provide sealing, although the use of a gasket between the joined parts can provide sealing.

“Notch and catch” system

Resin is molded so that it catches notched metal to impart bonding strength. The bonding strength depends on the size of the catch. This bond does not provide sealing since it is not a micro-interfacial bond.

Adhesive/Double-sided adhesive tape

Adhesives are used to bond metal and resin. Some materials are easy to bond, while some other materials are not, due to compatibility of joined materials. Another problem is that adhesives tend to degrade faster than resin or metal. Although easy to use, this technology requires control of excess adhesive and aging until the adhesive cures.

  AMALPHA Bolt Notch-and-catch Adhesive
Bonding strength ○~△
Sealing ◎~× ×
Bonding cost × ○~△
Material variety ○~△
Bonding after molding ×
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