About that polypropylene Coroplast...

A project log for Entropy Wheel Heat Recovery Ventilator

Rotating perforated disk counter-flow heat exchanger maintains indoor temperature while exchanging fresh outdoor air.

bryan-williamsBryan Williams 08/19/2014 at 05:191 Comment

Some lessons learned with coroplast. This stuff prefers mechanical binding methods, as very few glues will stick to this "low surface energy" material. 3M Hi-Strength 90 is ok, but you will need at least 2 cans @ $13 each to make the wheel, possibly more. I also have a specialty cyanocrylate type adhesive, Tech Bond BP Blue. This stuff is expensive, but should be much less messy and cause less thickness buildup, as the 3M #90 goes on rather like wood panel glue or caulk. 

So a better choice might be a mechanical clip with barbs to insert in the ends. This can also serve to bind the pieces to the center hub and support ball bearings. Working on a design, trying to learn Open SCAD. 


thisispeterstanley wrote 02/16/2016 at 19:45 point

whats your status on this barbe comb system? I am designing a velomobile and have the same concept, looking for a product before I design such a comb...

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