Expert forum: QCM epoxies (Questions answered!)

For discussions related to ski/snowboard construction/design methods and techniques.

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RoboGeek
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Post by RoboGeek » Tue Feb 27, 2007 6:16 am

ahh.. nice article!!
I used to be a lifeguard, but some blue kid got me fired.

Cadman

Post by Cadman » Tue Feb 27, 2007 1:50 pm

Are there formulas for making epoxies that can help in dampening the skis? I know that the big boys are using foam on the top of the cores and various laminates within the ski to act as damping but I don't know much about the resin formulas.

Last, Do the formulas for snowboards vary from the formulas used for making skis? Skis seem to require alot more shear strength between laminates than snowboards if I am not mistaken.

G-man
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Post by G-man » Tue Feb 27, 2007 5:05 pm

Most excellent! I'll be sure to pass on a big thank you to Roy when I place my next order. Thanks K's.

G-man

knightsofnii
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Post by knightsofnii » Tue Oct 07, 2008 3:18 pm

Hoping to make the switch to QCM.

Had a nice lengthy email conversation with Roy, very helpful and answers questions right away.

He hooked me up with sales rep and i'm getting samples, along with that I got some primer that's supposed to help bond this stuff to sidewall.
Have any of you used this primer? Results?
I'm going to do some comparison tests on small mockups
Doug

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SHIF
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Post by SHIF » Tue Oct 07, 2008 4:01 pm

knightsofnii wrote:...I got some primer that's supposed to help bond this stuff to sidewall.
Have any of you used this primer? Results?
I'm going to do some comparison tests on small mockups
Primer??
Do tell. What is this primer? I use QCM epoxy for my ski building, never heard of this primer. My skis have UHMW sidewalls. I roughen the plastic with 40 grit in my belt sander and then do a solvent wash. Seem to bond well but I'm always looking for a better method.

-S

hugocacola
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Post by hugocacola » Wed Oct 08, 2008 1:30 am

i have seen that primer in a ski industrie to bond thr tips... i am looking that like a crazy dog..

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bigKam
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Post by bigKam » Wed Oct 08, 2008 11:17 am

are you referring to chemlok?

knightsofnii
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Post by knightsofnii » Wed Oct 08, 2008 1:11 pm

I ordered the following:

EMV-0043 resin, ECA-408 hardener, and
the 459T primer. There's also a 459x primer its supposed to have the exact same result just a different composition.
Its from another company that QCM is now a distributor for, to fill some gaps they had with solutions for their customers I would assume.

the primer was 20bucks for a small can. I forget how much. I'll have results after 2 weekends, after we build with it.

Shif, make sure when you sand with that 40grit belt that you wet the belt or the plastic. If you heat the plastic too much it becomes really brittle.
And you should flash it with a flame as well.

I'll let you all know what happens with and without primer, im going to make up some test sections and do some flex and peel tests. The resin/hardner combo I got alone claims to bond real well to ptex as it is. So we'll see.
Doug

energy116
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Post by energy116 » Sun Jun 14, 2009 7:01 am

Hi
Tell me what epoxy viscosity will be perfect for the kiteboard? top/bottom heated.
Dan

jvangelder
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Post by jvangelder » Fri Aug 21, 2009 1:04 pm

Thanks for the artical, between this and the helpfull people at QCM my epoxy is on its way

zeno
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Post by zeno » Wed Jan 06, 2010 6:53 am

Today I took my second ski out of the press and it seems like I've really dded up...
When I had finished cutting out the excessive marterials at the sides of the ski i noticed that the topshhet layer had gone off the ski at the boders. The same thing happened with the base and the fibreglass layers.
So I started thinking and trying and came to conclusion that each layer can be teared off easily.
I have really no idea why, because I built the ski as my first one and the first ski doesn't make any problems...
The only thing that is different is that I've added a liquuid to reduce the air in the epoxy but it was about one drop of th air reducing liquid to a half kilo of epoxy(about 1.1 pounds). so I think that can't be the reason.

help me guys!! what went wrong??

here some pics...

http://picasaweb.google.com/zeno.sterz/ ... 7359579122

jvangelder
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Post by jvangelder » Fri Jan 08, 2010 10:46 am

What is this liquid you added?

That looks like the delam problems we were having when not either leaving enough epoxy on the edges before pressing or putting it in the press to quickly

Barrel Stave
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Epoxy

Post by Barrel Stave » Sun Feb 28, 2010 2:34 pm

After building and flying remote control airplanes and being a ski racer I have some clues on epoxy cures when fixing skis.

The Slow cure is the best method when building anything with a resin.

Here is something that I discovered that makes the cure more flexible and softer but just as strong if not stronger. Lead shot pulverized in the cure mix.


There is something in the lead that softens the cure properties but it makes it very strong workable and flexible.

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Brazen
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Post by Brazen » Mon Jan 31, 2011 7:34 pm

Plus, it's SO delicious. I'm just having tea and my last lead/epoxy chip with Hello Kitty.
"86% of the time it works 100% of the time".

ruchika
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Re: Expert forum: QCM epoxies (Questions answered!)

Post by ruchika » Sat Apr 13, 2019 1:33 am

would it be helpful to stick the center and everything else together with epoxy that contains (included) cotton chips. the cotton drops are regularly utilized the extent that I realize when building flying machines to improve the adaptability and pliability of epoxy and the materials that are stuck together. the epoxy fills in as the lattice between the material, the cotton pieces improve adaptability and pliability. So ... my supposition is, it would be a more grounded bond and an increasingly solid ski. Am I wrong or could this be right

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