I like what I here about the Innegra and insight into other fabrics is great too.
There’s some pretty radical stuff out there, as long as I don’t get bogged down in real work, I look forward to messing around.
Much appreciated guy’s, Thank you.
…I have a feeling i’m just about to tackle the hardest build to date, no actually, I know it will be.
Cheers
GO SON!!!
York,
Not to derail any further, but you’ve also got easier access to the Nylextra stuff that Sanded has been developing. I’d be keen to see what you’d do with it and hear your feedback.
Thought I read that Innegra was available with a Silane finish?
Ive been glassing with innegra , i find its best 2oz under a 4oz s cloth at a guess its as strong as 4oz carbon with 2oz s cloth over and about the same weight.
The rail laps need to be larger than usual with inegra , s glass must be around 1" 1/2 longer than the innegra.
Its kind of offtopic, but just out of interest, has someone here experience with a mix of cork and inegra or diolen?
Just thought that it could be good to protect the cork on rails with a less stiff fiber.
Figured I would leave this here. I compiled the above table out of curiosity. Looks like Innegra has an extremely low tensile and modulus strength which was very suprising, (maybe that explains why it was difficult to find the data). It is however 3 times lighter than S Glass, and I believe it has a much thinner fiber diamaeter, so it has at least 3x the fibers per area (volume?), and likely far more than that. More fibers per unit area is always preferable as it helps distribute stress and strain and has more sites to bond to the resin so perhaps that helps its real world strength. The low modulus relates to its ability to deform without breaking. So its baisically extremely fiber dense and able to deform and stretch without breaking. A very unnintuitive fiber.
I believe its would plot near the ‘‘Tegris PP’’ in the bottom lower left corner of the left image below.
I’ve made several back yard boards with innegra.
I put timber veneer on deck, and 2oz innegra between 2oz and 4oz e-glass on the bottom wrapped around rail to deck edge. My thinking has been timber top and bottom is too stiff. Innegra is not stiff, and dissipates impacts, which provides better flex, and mitigates buckling with an unbalanced top and bottom.
They feel less stiff than timber top and bottom, have very good impact strength, have less chatter, and can be light if you take care with resin absorbtion.
It hand laminates fine around rails as long as tail edges are not too sharp, and the capping glass overlaps it. Sometimes I don’t wrap it around the rail, just cover the bottom.
Good fibreglass sissors cut it well. It’s tricky to roll out straight after wetting out on a table.
I like it and will keep using it.
Nothing more than a “plastic” fiber. Plastic = ductile matérial, material that can deform permanently before break. This permanent deformation disperse energy opposing elastic deformation where energy is store. With “plastic” material it’s interesting to have max elastic elongation and max break élongation because they are far. Be carefull in mechanic soft steel is a plastic material. One big problems we found with plastic fiber in composites is that’s a one go material. Residual mechanical properties after first impact where low where as parts look in good shape.
I have a suspicion that some surfboard suppliers are selling chinese polyethylene as Innegra and that we’re not all comparing the same product…
Large quality manufacturers outsource there production to country’s with cheaper laber and lower human rights.
Globalisation is false economics, the only winners in the short-term are the share holders of the company.
Long term the kids in the richer country dont have a manufacturing indistry and will pay more for the product.
Thank you for your comments. Lowel
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My post 51 was a reply to post 48 where poster show méchanics characteristics diagram, the good way to understand physically what happen. This is my work deformation but not easy to be clear in frenglish lol. Most of time i explain mechanics, in french, to people that have ever a mid go high knowledge in mechanics. So sorry i may stop those mechanics delirium.
Please stay on topic hydro.