Material Selection for TPE/steel overmolding
Material Selection for TPE/steel overmolding
(OP)
Hi, Can anyone please suggest an elastomer that will bond well to steel? and also be suitable for use in oil? (It is a steel part overmolded with an elastomer seal).
We are attempting to overmold an elastomer seal onto a small forged carbon steel part, currently we have tried Thermoplastic polyurethane with a primer, onto phosphated and un-phosphated steel.
The bond is ok, but not compatible with automotive oil (It becomes very week).
I would imagine the material used in rubber/steel bonded oil seals would be perfect, but I have yet to discover the material and processes they use.
Thanks for any suggestions.
Ryan
We are attempting to overmold an elastomer seal onto a small forged carbon steel part, currently we have tried Thermoplastic polyurethane with a primer, onto phosphated and un-phosphated steel.
The bond is ok, but not compatible with automotive oil (It becomes very week).
I would imagine the material used in rubber/steel bonded oil seals would be perfect, but I have yet to discover the material and processes they use.
Thanks for any suggestions.
Ryan





RE: Material Selection for TPE/steel overmolding
Regards
Pat
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RE: Material Selection for TPE/steel overmolding
Also, a vulcanized, millable urethane might have a little better retention of properties after oil exposure than a thermoplastic urethane.
Hope this helps,
tom
RE: Material Selection for TPE/steel overmolding
RE: Material Selection for TPE/steel overmolding
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Material Selection for TPE/steel overmolding
Thanks
Ryan
RE: Material Selection for TPE/steel overmolding