Nida Core alternative
I was drawn to this forum discussion as I was doing some research
on these Duflex and Durakore products from ATL. My memory of a product termed Durakore stretches back quite a number of years to a product by that same name that was marketed by a USA company that specialized in balsa core products....that company's name was Baltek if I recall
So over the years I've just assumed that all such products were all balsa related, but now I discover you might be referring to balsa or foam cores in products of the same name....somewhat confusing? I've seen so many different core products come and go that I've almost lost
track....particularly with the numerous foam types.
Several honeycomb products have seen considerable use in boat building, the well known Nomex, and the lesser know Nida-Core. Then there are a number of honeycomb products from Plasticore, etc
Nida-core is unique in that it is a polypropylene material. Mostly we think of this plastic material as one which is difficult to glue together, and difficult to glue anything to it. Bonding on sandwich skins via their polyester or epoxy resins directly to polypropylene can prove fruitless. For the most part things need to be 'fused' together with heat. That's what Nida-core does. They thermo-fuse a non-woven polyester scrim material onto the edges of the honeycomb cells,...and they include a polypropylene barrier film to limit resin consumption
by the hollow cells when skins are applied.
So it appears to me that it is this thermo-fused bond between the honeycomb structure and the polyester scrim that is the most important factor in making this particular cored construction one of the more viable ones out there. It will not rot
like balsa. It will not sip any water thru the cell walls. If that thermo-fused bond with the scrim material is mostly all intact if should not allow water to migrate along the core cell structure. And it is relatively cheaper than many of the alternatives.
So what's not to like about this sandwich-core construction material...in comparision to those discussions above??