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PUR GF 20

PUR GF 20

PUR GF 20

(OP)
Hello, I apologize if this is posted in the wrong forum.  I see this is for engineers, etc.  I am not an engineer.  I am in the process of attempting to repair a plastic panel on my wife's car.  I'm buying a "plastic-welding" machine, but in order to use it properly I must identify the type of plastic.

It is:  PUR GF 15.  I know what PUR is (Polyurethane Resin), but don't understand, nor can I find any info anywhere, on the GF 15 part.  I have read that not all PUR can be welded, can anyone help?  Thanks, and sorry if this is the wrong place to ask.  I don't know where else to go.

RE: PUR GF 20

could well mean that the resin has a 15% glass fibre content, which will not affect its welding properties much.

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

RE: PUR GF 20

(OP)
Ahh yes, that makes perfect sense.  Thanks for the tip.

RE: PUR GF 20

Greg is correct.

PU has 2 types, thermoplastic and thermoset. Only thermoplastic types can be welded with heat. A simple test is to heat a small piece of the plastic and see if it melts first or just degrades. Take care as degraded PUR produces cyanide gas.

Regards

eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
 

RE: PUR GF 20

(OP)
Very good.  I had read that not all PUR could be welded, but didn't know how to tell the difference.  Also, thanks for the safety tip with the thermoset.  Much appreciated.

RE: PUR GF 20

Ummm

Both types will produce Cyanide if degraded, so avoid smelling fumes from either type when heating them.

Regards

eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
 

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