Subject: Re: [harryproa] Re:: Infusion epoxy
From: "=?UTF-8?B?QmrDtnJu?= bjornmail@gmail.com [harryproa]" <harryproa@yahoogroups.com.au>
Date: 8/24/2018, 5:05 AM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

Can you explain the difference between potlife and gel-life? Whats the viscosity of the gel?

The reaction in my pot from my described test, made the epoxy feel solid after about half an hour. And I measured the temperature to about 70 °C. That might have been an unusual behavior from me heating it though. But also, when I have been doing hand layup with it, after about an hour, it becomes very thick and sticky, like resin from a pine tree.

On Fri, Aug 24, 2018 at 10:55 AM, Fram henny@fram.nl [harryproa] <harryproa@yahoogroups.com.au> wrote:
 

For the best result the resin has to flow as long as possible to create an even resin/glass ratio over the whole surface. Depending on size and infusion strategy say 3-4 hours or so. By that time there will be a stable balance. Gelling any sooner will create an over saturated laminate at the feeding side where the vacuum pressure is much less than on the vacuum side. So a resin with a max of 200 mpa viscosity and a gel time of at least 8 hours is desirable for infusion. That also gives some more time for the "oh sh*t" happening. Pot life is not very interesting.


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Posted by: =?UTF-8?B?QmrDtnJu?= <bjornmail@gmail.com>
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