Why Polypropylene is so difficult to Bond ?
Why Polypropylene is so difficult to Bond ?
(OP)
I want to Bond PP to Brass,but not able to get suitable solution. Everybody knows PP is difficult to bond substrate due to inert nature.
Friends Can you please help me in understanding the chemistry why PP is difficult to bond and what are the best ways of bonding it.
Thanks
Smita
Friends Can you please help me in understanding the chemistry why PP is difficult to bond and what are the best ways of bonding it.
Thanks
Smita





RE: Why Polypropylene is so difficult to Bond ?
aspearin1
RE: Why Polypropylene is so difficult to Bond ?
The sugestion to get mechanical bonding is a good one. I have found that it is usually better to have raised barbs rather than holes. These melt and penetrate plastic with little flow being required. To get the polymer to melt at the surface and then flow though a hole is much more difficult.
A useful technique is to spot weld a woven or knitted wire mesh to the metal suface. Heat the metal object above the melting point of the plastic and press the plastic part onto the metal one. As the plastic melts the metal cools and the bonding is complete in ten or twenty seconds.