Bonding metal to wood (food grade)

[Holmz]

Thinking about bonding metal to wood...
Probably either copper or silver, and to something like walnut or cocobolo.

Epoxies are generally not great for food grade.
Any ideas for options? (Assuming that I do not want screws or fasteners?)

 

[teocaf]

you don't mention how much (how big) wood to how much metal.  it could make a difference.  the design can also make a difference, like if you're insetting one material into another rather than gluing one on top of the other, etc.

but anyway, an epoxy like G/flex from West System would most likely be a very good solution for your needs.  once epoxy CURES FULLY, it should be perfectly safe for food grade and it waterproofs things in a way that other glues may not be able to.

 

[rst]

I make replacement plastics for a large grocery chain regularly.  If you can find a restaurant supply or fabrication company, food grade silicone and polyurethane are readily available

 

[Holmz]

[member=2205]teocaf[/member] [member=25351]rst[/member] a late or serving tray with an edge band. I'll look into those epoxies, silicon, polyurethane.
It is differential thermal expansion and/or wood humidity related swelling and shrinkage (factor) that I am thinking would rip it apart.

 

[tjbnwi]

3M VHB.

Tom

 

[rst]

Both silicone and polyurethane have excellent modulus of elasticity, very few epoxies do.  Many of 3M's very high tapes systems are also excellent which is why they are used many industrial/ commercial projects...think holding large insulating glass on high rises.

 

[bobfog]

What about West System G Flex epoxy?