 |
11-11-2009, 05:43 PM
|
#1
|
|
Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
|
epoxy and polyester resins
Am i correct in saying polyester resins do NOT stick to wood that well?? If so how do they make it stick to the wood in a transom??
With Epoxy, do you still need layers of csm in between cloth to get a good mingle of the different layers (stop delaminating), im sure ive read somewhere csm doesnt respond well to epoxy resins.
Lastly can someone suggest a light core material such as that used on bulkheads please.... And is it safe for use on polyester and/or epoxy resins.
Thanks GT
__________________
|
|
|
|
11-11-2009, 06:08 PM
|
#2
|
|
Registered User
Country: UK
Join Date: Jun 2006
Posts: 1,237
|
Dont forget Vinylester!
Easy aint it?
__________________
|
|
|
|
|
11-11-2009, 06:27 PM
|
#3
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Quote:
Originally Posted by glen76
Am i correct in saying polyester resins do NOT stick to wood that well?? If so how do they make it stick to the wood in a transom??
Thanks GT
|
'Some' companies used to prime all the timber, to seal and aid adhesion of the pollies, but those practices are rare now.
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
11-11-2009, 07:54 PM
|
#4
|
|
Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
|
Quote:
Originally Posted by Jon Fuller
'Some' companies used to prime all the timber, to seal and aid adhesion of the pollies, but those practices are rare now.
|
so is the timber just sat in a big sandwich rattling around??
|
|
|
|
|
11-11-2009, 09:24 PM
|
#5
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Quote:
Originally Posted by glen76
so is the timber just sat in a big sandwich rattling around??
|
I expect it is in some boats.
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
11-11-2009, 09:40 PM
|
#6
|
|
Registered User
Country: uk
Location: portsmouth
Occupation: Director of a fiberglass company
Interests: boats,cars,bikes,paintball
Boat make: phantom 23,Extreme 24
Engines: 6.2 mercrusier + 2.5 280 mercy
Cruising area: solent
Join Date: Jul 2009
Location: portsmouth
Posts: 530
|
We use to score the wood up then paint cobalt on the wood ( cobalt is an accelerator and will be hard to get hold of ) and as also mentioned vinylester is sometimes used as a barrier ‘skin ‘ coat for a polyester laminate that is to be immersed in water, such as in a boat hul.
|
|
|
|
|
12-11-2009, 07:22 AM
|
#7
|
|
Registered User
Country: Germany
Location: Germany, Wiesbaden
Occupation: Boatbuilder, retail and wholesale
Interests: Boating
Boat make: skater 28/Phantom 21/ Shark-24
Engines: Yamaha's, Merc 300xs
Cruising area: River Rhein
Join Date: May 2005
Location: Germany, Wiesbaden
Posts: 49
|
For transom we take no wood moore! We take Airex PXw.385.
If you laminate Wood with Polyester, you must prime with G4!
Better is vynilester or epoxy!
If you take epoxy and you will work with polyester again, you mast prime with vynilester!
Than you can work with poyester again.
Regards,
Kai
|
|
|
|
|
12-11-2009, 09:13 AM
|
#8
|
|
numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
|
Steve (Phantom Boats) used G4
__________________
.
"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
|
|
|
|
|
12-11-2009, 05:55 PM
|
#9
|
|
Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
|
so is epoxy safe on balsa and closed cell foams?? and can you use csm with epoxy or not??? IF not how do you stop the layers delayering.
|
|
|
|
|
13-11-2009, 02:05 PM
|
#10
|
|
BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
|
Quote:
Originally Posted by Jon Fuller
Steve (Phantom Boats) used G4
|
You can add us to that list!
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
|
|
|
|
|
14-11-2009, 05:37 PM
|
#11
|
|
Registered User
Country: england
Location: dartmouth
Occupation: rib tube designer/builder
Interests: motor bikes
Boat make: 5.4 avon searider
Join Date: Mar 2005
Location: dartmouth
Posts: 62
|
whats G4
|
|
|
|
|
14-11-2009, 06:09 PM
|
#12
|
|
Registered User
Country: Job Centre
Location: In a box
Occupation: Chaos's gofer
Interests: Skiving
Boat make: Spectre 30
Engines: 2 x Promax 225
Cruising area: In the bath
Join Date: Mar 2004
Location: In a box
Posts: 5,201
|
__________________
Chaos for Moderator. 
|
|
|
|
|
15-11-2009, 08:49 AM
|
#13
|
|
Registered User
Country: england
Location: dartmouth
Occupation: rib tube designer/builder
Interests: motor bikes
Boat make: 5.4 avon searider
Join Date: Mar 2005
Location: dartmouth
Posts: 62
|
thank you Tony
|
|
|
|
|
16-11-2009, 03:11 AM
|
#14
|
|
Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
|
Quote:
Originally Posted by glen76
so is epoxy safe on balsa and closed cell foams?? and can you use csm with epoxy or not??? IF not how do you stop the layers delayering.
|
Yes epoxy is fine with balsa and foam. You can use CSM with a special binder for epoxy as it's the binder that hinders the cure.
Most fabrics that you would use with epoxy come with a light mat layer stitched to the back to help inter laminar bond.
This is not necessary with epoxy, but advisable with vinyl and essential with poly.
Alan
__________________
|
|
|
|
|
| Thread Tools |
|
|
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
