vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

Post by Courtney Thoma » Thu, 04 Dec 2003 07:32:42


Can this be done ?

If yes, who has done it?

Thank you.
--
Courtney Thomas
s/v Mutiny
lying Oriental, NC
WDB5619

 
 
 

vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

Post by ddin » Fri, 19 Dec 2003 08:40:18

Can you be more specific?


Quote:
> Can this be done ?

> If yes, who has done it?

> Thank you.
> --
> Courtney Thomas
> s/v Mutiny
> lying Oriental, NC
> WDB5619


 
 
 

vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

Post by Glenn Ashmor » Fri, 19 Dec 2003 10:01:26

I do not think it can be done or if you try the risks are mighty high.
Polyester does not give you enough open time to place the glass properly
and get the bag sealed and drawn down.  The only controls you have are
the temperature and the amount of MEKP and they have to be held to very
exact tollerances.

You can do it with resin infusion but trying to arrange the feed lines
and vacuum ports for even flow is a black art without some guidance.
There are volumes written on the various proprietary processes but the
volumes are not cheap and don't really tell you everything.

Quote:

> Can this be done ?

> If yes, who has done it?

> Thank you.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at:  http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

 
 
 

vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

Post by Michael O'Del » Fri, 19 Dec 2003 11:51:03



Quote:
> I do not think it can be done or if you try the risks are mighty high.
> Polyester does not give you enough open time to place the glass properly
> and get the bag sealed and drawn down.  The only controls you have are
> the temperature and the amount of MEKP and they have to be held to very
> exact tollerances.

> You can do it with resin infusion but trying to arrange the feed lines
> and vacuum ports for even flow is a black art without some guidance.
> There are volumes written on the various proprietary processes but the
> volumes are not cheap and don't really tell you everything.


> > Can this be done ?

> > If yes, who has done it?

> > Thank you.

it's far easier to do this with epoxy than poly or vinlyester resins.
MAS makes a slow hardener that can give you as much time as want.
even so, practice on some simple things before doing something
this ambitious.  the cost of the epoxy is small compared to
everything else.

   -mo

 
 
 

vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

Post by Courtney Thoma » Mon, 22 Dec 2003 08:03:00

I'll try.

I have a 40' boat whose solid fiberglass construction was with
E-glass/polyester resin.

I am seeking information regarding the possibility of 'strengthening'
the hull by laminating it with an S-glass triaxial 'mat' and epoxy resin
using vacuum bagging to apply.

Courtney

Quote:

> Can you be more specific?



>>Can this be done ?

>>If yes, who has done it?

>>Thank you.
>>--
>>Courtney Thomas
>>s/v Mutiny
>>lying Oriental, NC
>>WDB5619

--
Courtney Thomas
s/v Mutiny
lying Oriental, NC
WDB5619
 
 
 

vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

Post by Courtney Thoma » Mon, 22 Dec 2003 08:05:58

Thank you Michael.

That was my understanding about epoxy usage, as well.

I'm unconcerned about the cost of the resin vis-a-vis all that is
involved here.

Cordially,
Courtney

Quote:



>>I do not think it can be done or if you try the risks are mighty high.
>>Polyester does not give you enough open time to place the glass properly
>>and get the bag sealed and drawn down.  The only controls you have are
>>the temperature and the amount of MEKP and they have to be held to very
>>exact tollerances.

>>You can do it with resin infusion but trying to arrange the feed lines
>>and vacuum ports for even flow is a black art without some guidance.
>>There are volumes written on the various proprietary processes but the
>>volumes are not cheap and don't really tell you everything.


>>>Can this be done ?

>>>If yes, who has done it?

>>>Thank you.

> it's far easier to do this with epoxy than poly or vinlyester resins.
> MAS makes a slow hardener that can give you as much time as want.
> even so, practice on some simple things before doing something
> this ambitious.  the cost of the epoxy is small compared to
> everything else.

>    -mo

--
Courtney Thomas
s/v Mutiny
lying Oriental, NC
WDB5619
 
 
 

vacuum-bagging an E-glass/polyester resin hull with a bi-axial S-glass epoxy laminate........

Post by FRP » Mon, 22 Dec 2003 08:04:34

May I ask why you are considering epoxy and vacuum bagging so strongly ?

How old is the boat and what makes you believe that it needs more strength
in the hull?

There are other alternatives to this particular combination but  I am
interested in what lead you to it initially.

frp
up the road in "The County"