On 7/31/2020 3:06 PM, Flesner via KRnet wrote:
You might also want to put a slightly larger hole in the bubble large
enough to inject some resin under the skin and weight it down till the
resin cures.
++
Serge,
The usual cause of small bubbles in the epoxy is rapid stirring the resin and
hardener. For most wet lay up work this is not a problem. You will be
smoothing out with a squeegee and that will get rid of the bubbles. In the
certified industry we put the lay up under vacuum and that suck
- 2006 - KR Gathering
There is a time for building and a time for FLYING and the time for building
is OVER.
Daniel R. Heath - Lexington, SC
---Original Message---
From: Serge VIDAL
List-Post: krnet@list.krnet.org
Date: 04/24/06 05:51:04
To: KRnet
Subject: KR> Bubbles in Epoxy resin
Last t
Serge Vidal wrote:
> Last time I mixed some Epoxy, I noticed that there were
> plenty tiny bubbles in it.
I don't know what epoxy you use but I usualy have the
same "problem" while mixing Rand A and B epoxy.
If I pour the resin too fast or stir the mixture too vigorously
I get air bubbles in th
The air will not be a problem, just keep mixing to a uniform colour, when
you add flox or M/balloons, or even spread it on the glass cloth, the
bobbles will disappear.
Phillip Matheson
0408665880 (cell)
VHPKR
Australia.
mathes...@dodo.com.au
NEW WEB PAGE
www.philskr2.50megs.com
http://www.vw-engi
Last time I mixed some Epoxy, I notices that there were plenty tiny
bubbles in it.
Now, I never had that before. So, I'm just curious. What explains that?
Serge Vidal
KR2 "Kilimanjaro Cloud"
Paris, France
Net Heads,
I have acquired a few bubbles under the fiberglass skin on my stub
wings.Apparently these are some sort of gas bubble which has caused the
phenomenon. The largest one is about 1 1/2 inch wide and 2 inches long.
These bubbles were fairly hard till I drilled a pin size hole in them to
reli
Mark,
Just a suggestion... Would it be better to cut the
bubble off, grade it's sides all around and do a fresh
small layup on it. Just like you would have had to do
it you were repairing a puncture?
Regards,
Ameet
--- Mark Jones wrote:
> Net Heads,
> I have acquired a few bubbles under the f
That is one way to do it.
Mark Jones (N886MJ)
Wales, WI USA
E-mail me at flyk...@wi.rr.com
Visit my KR-2S CorvAIRCRAFT web site at
http://mywebpage.netscape.com/n886mj
- Original Message -
From: "Ameet Savant"
To: "KRnet"
Sent: Sunday, September 25, 2005 9:2
Bubbles are sometimes formed by moisture under the skin that cooks and the
gas expands stretching the plastic skin. Another cause is the use of spray
foam, which sits un-cured encapsulated by cured foam and glass, until one
day it gets enough heat to cure and at that point it expands, creating
>I have acquired a few bubbles under the fiberglass skin on my stub
>wings.Apparently these are some sort of gas bubble which has caused the
>phenomenon. The largest one is about 1 1/2 inch wide and 2 inches long.
Drill a tiny hole at each end of the bubble, mix some wet micro, insert it
in one
Mark
Don't heat them you will get a bigger bubble I speak from experience.
Sand it down and layup a new layer or 2 depending how deep you have to
sand
Lee
- Original Message -
From: "Mark Jones"
To: "KR Net"
Sent: Sunday, September 25, 2005 7:2
"Don't heat them you will get a bigger bubble...".
I do agree with Lee that heating may get you bigger bubbles. I must add
that in the case of uncured foam, it's like having little time bombs that
will eventually all cure when exposed to enough heat or sunlight. The
problem is that they will
I am not sure what has caused the bubbles. The areas which have the
bubbles do not have any spray foam so that is ruled out. I only had two
bubbles when I was at MT Vernon but a week later a few more tiny ones
popped up? These are on my stub wings and a couple on my front deck top.
There is no fuel
IDAL/DNSA/SAGEM)
Objet : RE: KR> Bubbles
I am not sure what has caused the bubbles. The areas which have the
bubbles do not have any spray foam so that is ruled out. I only had two
bubbles when I was at MT Vernon but a week later a few more tiny ones
popped up? These are on my stub wi
I know that trapped moisture that could come from wet sanding could do
something similar.
Orma
Southfield, MI
KR-2 N110LR 1984
See Tweety at http://www.kr-2.aviation-mechanics.com
See other KR spces at www.kr-2.aviation-mechanics.com/krinfo.htm
Netters,
Does anyone knows how do you prevent bubbles in your first layer of
carbon? I am making a carbon fiber spinner with a clear epoxy surface coat
and when I pull the spinner out of the mold I am greeted with bubbles
trapped between the weave, how can I prevent these. If I was painting it,
it
George wrote:
> Does anyone knows how do you prevent bubbles in your first layer of
> carbon? I am making a carbon fiber spinner with a clear epoxy surface coat
> and when I pull the spinner out of the mold I am greeted with bubbles
> trapped between the weave, how can I prevent these.
Vacuum bag
if you place your cloth on a piece fo heavy visquine plastic, pour on resin,
cover with another piece of plastic, the
use a puddy squigy to work in the resin till no dry areas remain, removfe from
the plastic and install into mold and sqegggy firmly, remove the last piece of
plastic after cured
if you place your cloth on a piece fo heavy visquine plastic, pour on resin,
cover with another piece of plastic, the
use a puddy squigy to work in the resin till no dry areas remain, removfe
from the plastic and install into mold and sqegggy firmly, remove the last
piece of plastic after
Thanks guys,
for all suggestions and hints with my bubble problem.
Also I received an email from the guy who is not on the KR-net list. He in
fact knew that I am using wax for mold release and I have the feeling that
he is more than right about my attempts in composite layout.
While his website i
I'd recommend you replace the carbon with S2 glass or E-glass; however, your
problem is easily fixed with the additional application of "extra heavy hold
hair spray" (aerosol type) used in the mold. Hair spray cheap substitute
for the traditional PVA mold release. Remove the hair spray with warm w
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