Of course it is ... I would also add Shear modulus of the core, Laminate properties (Thickness, reinforcement modulus, fiber volume fraction in the laminate, resin properties, lay-up direction, ...) But it's also true that the thickness of the core is the main way to add stiffeness with same laminat...

I think I have already post this but lets go for a reminder: From my point of view and experiences, pre-cut the base is definitely a good way to minimize distorsion, but you can also add a thin layer (0.1 to 0.2mm) of fiberglass directly on the base before cutting it. The fiber glass will then stabi...

So finally. Please take a look at http://www.loctiteaero.com/DownLoads/surface_preparation_guide.pdf This could be very helpfull for everyone. I have try this chemical treatement on PVC, ABS and PE, with typical bonding with fiberglass+epoxy laminate => peel test. No scientific results (yet), but al...

"Ten posts" rule against spam is boring ! Maybe I can tell more about chemical treatement with concentrated sulfuric acid wich is typicaly used for neopren or rubber bonding. Interesting buy maybe dangerous for children :? This need a chemical resistant tanks with high concentraded acid (6...

Two posts more ... The problem with plastics such as Teflon, PE, ABS, PVC, ... and other thermoplastics is the relative high chemical resistance and stability wich is totally unwanted for thermoset bonding (Epoxy, ...). All kind of treatement are about breaking superficially some chemical/moleculare...

Well, need three more posts to add an URL... I have never try flame treatement but it seems that the repeatability and real quality of the treatement could be discussed. To get good bonding properties with thermoset resins, you need good roughness, wetting property and very clean surface. There is a...

That's true ! Material engineering and surface technology are obviously one of the main key for good and durable skis ... and also a nightmare for "backyard" skibuilders. As far as I know, the treatment of plastics for bonding involves typically industrial processes such plasma, corona, fl...

hello, I will keep writing in english for everyone understanding. But for sure I would prefer french for you. Basically, I would say that the more strips you will laminate, the better the wood core will be (better homogeneity). But also more glue, more weight, more labor... I use 14...15mm square st...

Many thanks for your answers about VDS. Now ... I just have to find someone in EU to buy some. I have some rubber sheet about 0.8mm. Definitely too thick on the edges, regarding your answer. I'm also not confident in the bonding properties of this rubber sheet. One of my ski has delaminated at the f...

This reply after using the search engine on "rubber thickness".... No answer to my question ... What is the thickness of the so called VDS rubber on the edges ? Somebody tells about 0.025" (1.4 mm!) This seems very heavy from my point of view. Or someone tells the half of the quarter ...

I do admit you are right with the kevlar: no good in compression. But laminated on the base, under the wood core, no compression occurs. Keep in mind that the laminate is very thin, so I have never met any problem when prebending the edged base. Regarding the bonding properties, I trust the sizing o...

Hi there. Maybe a good tip to share: I always laminate a thin ply of fiberglass fabric (0.1mm) with peel-ply on the UHMW base BEFORE cutting. This is to stabilize the base. You can also laminate some kevlar fabric for bullet-proof construction. The curing must be done at room temperature to avoid th...

Hi there, I'm pretty new on the forum and also with, maybe, a very poor english. Sorry about that . Anyway, I will try now to share few of my experience in ski building. First, to reply some interesting posts, then later, post new topics with pictures of my different projects. One of my old project ...