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I've been using a heat gun to speed up filler curing for a decade, but a new guy at our shop in Tampa said it weakens the bond.
He showed me a tech bulletin from 3M that said rapid heat can cause micro-fractures. Now I'm second-guessing my whole process. Do you think a slower cure at room temp is actually stronger, or is this just overthinking it?
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kim.stella4d ago
That 3M bulletin is pretty specific... micro-fractures sound like a real thing. Have you tried testing it yourself on some scrap material? Like, do a heat gun cure and a room temp cure, then try to pry the parts apart. I'd be curious if the failure point is actually different or if it's just a tiny lab result that doesn't matter in the real world.
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nancy304d ago
Wait, isn't the bulletin about using a heat gun on the adhesive while it's curing? I thought the whole point was that heating the part itself after it's set can cause those cracks.
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