AngusMcDoon
Well-Known Member
I've just had to do an emergency repair at sea. I used cotton fibre (an old pillow case) with flowcoat I happened to have. How strong do you think it will be?
CFRP emergency repair
- Thread starter AngusMcDoon
- Start date
Quandary
Well-Known Member
Surely a bit more info.needed
What did you repair?
How big was the hole, split, tear or whatever?
What did you repair?
How big was the hole, split, tear or whatever?
DownWest
Well-Known Member
Not very, as the fibres, unlike glass, don't have much tensile strength. Equate it with bodyfiller. Essentially, you have thickened up the resin, so it doesn't flow 
AngusMcDoon
Well-Known Member
Vital bit of the boat, can't go anywhere without it, hang on, I'll get a photo...
AngusMcDoon
Well-Known Member
Not very, as the fibres, unlike glass, don't have much tensile strength. Equate it with bodyfiller. Essentially, you have thickened up the resin, so it doesn't flow
Well you can't tear cotton in half very easily by hand. It's biaxial like the proper stuff, or is it more akin to woven roving?
AngusMcDoon
Well-Known Member
johnalison
Well-Known Member
It'll be fine, or maybe cover your legs with boiling water. I'm not licensed to put a kettle, if that's what it was, on a varnished tabletop.
sarabande
Well-Known Member
Were you wearing proper PPE appropriate for the layup and flowcoat processes ? Is the flowcoat specced for an operating environment of c100C ? Have you done a risk assessment on how the the lever system for the whistle could be compromised, thereby creating a pressure vessel ? Is the bi-axial cotton fibre suitably orientated for a left-handed kettle ?
AngusMcDoon
Well-Known Member
GHA
Well-Known Member
Should be good for a year or two :encouragement:
I've used dyneema before, strong as @#$%!
I've used dyneema before, strong as @#$%!
prv
Well-Known Member
Nice job 
More sophisticated than me as I’d probably have used nuts and bolts and bits of scrap stainless
Pete
More sophisticated than me as I’d probably have used nuts and bolts and bits of scrap stainless
Pete
anoccasionalyachtsman
Well-Known Member
I don't think you'll sleep at night.
lpdsn
Well-Known Member
Too much caffeine in the tea or coffee does that.
anoccasionalyachtsman
Well-Known Member
S'not the caffeine. His pillow will be hellish scratchy.
Concerto
Well-Known Member
Angus, did you get hot under the collar and blow some steam off?
Surprised you did not have some Superglue or Araldite on board.
Surprised you did not have some Superglue or Araldite on board.
William_H
Well-Known Member
Your post refers to CFRP which I think is "carbon fibre reinforced plastic". However I seriously doubt the black plastic kettle handle has any carbon fibre in it. So yes your flow coat (polyester resin) should be as strong as the original plastic (een with cotton filler) however the adhesion to the balck plastic may be the fail point. olewill
PaulJS
Well-Known Member
I think that in this case it might mean "Cotton Fibre Reinforced Plastic"... ��
AngusMcDoon
Well-Known Member
It does! Wasn't Tufnol originally a phenolic resin & cotton composite?
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AngusMcDoon
Well-Known Member
I do, but neither really seems to stick plastic well. I superglued it first to hold it in place, then used the CFRP to wrap round the joints. It looks & feels like a plaster cast, & smells like a boatyard.
DownWest
Well-Known Member
Yes, I still use it for bits. Turned up some winch heads for the retro look. Though I understand that the dust is bad for you.
So, your CFRP might be a bit stronger than bodyfiller
