woodcore surface preference for best bond strength?

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kungpowd
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woodcore surface preference for best bond strength?

Post by kungpowd » Thu Mar 14, 2013 8:16 am

Just curious as to wether some of you folks have found any serious difference in bond strength with a sanded or planed woodcore surface?

skidesmond
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Post by skidesmond » Thu Mar 14, 2013 9:40 am

I haven't found any difference.

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vinman
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Post by vinman » Thu Mar 14, 2013 10:45 am

Literature says a planed surface leave the pores open to allow the glue to penetrate. Sanding with less than 100 grit destroys the pores and may be less strong.
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MadRussian
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Post by MadRussian » Fri Mar 15, 2013 4:27 pm

Vinman wrote:Literature says a planed surface leave the pores open to allow the glue to penetrate. Sanding with less than 100 grit destroys the pores and may be less strong.
After router profiler I will need to make couple light passes with sender. What's the best grit for sandpaper to make final pass?

gozaimaas
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Post by gozaimaas » Fri Mar 15, 2013 5:18 pm

I have used 80 grit to finish without issue

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vinman
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Post by vinman » Fri Mar 15, 2013 6:49 pm

I use a planer so this is just my opinion based on what I've read. It probably doesn't make a ton if difference.. But if it were me I'd use 100 grit for a finish pass after profiling.

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Richuk
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Post by Richuk » Tue Mar 26, 2013 6:41 am

Found this paper yesterday. I think the answers are fairly complex, but if you assume best practice is a core with a low moisture content, planned and the wood within the core is partly chosen because it is porous, then you should start to optimise your results.

http://www.fpl.fs.fed.us/documnts/pdf20 ... art001.pdf

I would factor in the ramp rate at which the press is ramped through the temperature range at which the epoxy/resin is at its lowest viscosity.

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