What resin on existing parts ... Poliester or Epoxy ?

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What resin on existing parts ... Poliester or Epoxy ?

Author	Message
fibernoob	fibernoob posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 34, Visits: 134	"epoxy doesn't stick to polyester" Thanks again Hanaldo .... its exactly that statement that was getting to me.... Had it as a golden rule from all the theory ... Edited 8 Years Ago by fibernoob
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Hanaldo	Hanaldo posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	In all honesty, I don't believe it matters too much. Epoxy has the highest bond strength of the three resins, and so is the natural choice for a repair on an unknown laminate. If you are being put off by the statement that epoxy doesn't stick to polyester, then don't be. I have done hundreds of repairs epoxy resin on polyester parts, none of them have failed due to delamination. I suspect the statement has more to do with trying to bond epoxy to a freshly produced polyester laminate with minimal surface prep, in which case I could understand a poor bond. But on a properly cured laminate with a well keyed/cleaned surface, epoxy will stick like the proverbial.
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fibernoob	fibernoob posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 34, Visits: 134	Thank-you .... Will start sniffing ...
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Fasta	Fasta posted 8 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	If you can see any CSM (chop strand matt) then it is likely polyester or vinylester. If you know what these materials smell like then just give it a slight sanding and take a sniff. The polyester/vinylester will have a noticable smell whereas an epoxy laminate does not really have a strong scent of anything. Fastacraft Facebook page Edited 8 Years Ago by Fasta
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fibernoob	fibernoob posted 8 Years Ago HOT Topic Details
Group: Forum Members Posts: 34, Visits: 134	Hey all. When having to repair an existing part what is the best way to find out what resin the part is made of? Is there a simple method to detect the poliéster or epoxy? I have been told to burn the resin and detect the color of the smoke (black = poliester , colourless = epoxy). This obviously is not a very practical method with existing parts that need repair. Thanks in advance.
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