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Re: Section8-titanal

Posted: Wed Apr 17, 2019 1:25 am
by ruchika
sounds insane thick. In the event that u wanna complete 2 layers I have calced .3.

What are ypu attempting to acheive?

Firmness longitudenally?

Tortional firmness?

Sogginess from metal weight?

What flax weight are u useing?

Ive done 6x6inch layups with triax glass and 1/4" utilize cant twist them.

Some race skis simply have one layer of light weight biax and after that the titanal.

Re: Section8-titanal

Posted: Wed Apr 17, 2019 6:15 pm
by skidesmond
My main goal is to achieve a damp ski that handles like a race ski that's torsional stiff, grips ice well yet bends longitudinally.

I made a test piece also, but can't recall the exact size and dimensions, probably 6x12inch. 1/16in ash veneer with flax, .6 titanal, on each side of the ash, bonded with entropy resin. I could not bend it no matter what. I placed 2 bricks under it and stood in the middle of the sample and it did not flex. Long story short the sample piece doesn't represent a ski. Although it did tell me that I was able to bond all that material with any problems.

The flax is a biax weave 350 gsm. Honestly the ski is not thick at all.

There are many skis on the market that have 1 layer of metal on top, not just race skis.

Re: Section8-titanal

Posted: Sat May 18, 2019 10:10 am
by jorgepp
Thanks for the information.

Re: Section8-titanal

Posted: Thu Oct 03, 2019 5:36 am
by mowgli1996
Hi,
I've done some bonding test between titanal and wood.
The first time cleaning titanal with acetone, in the second sanding it.
In both case I haven't had good results.

Some advice? How do you treat titanal before bonding?
Thanks

Re: Section8-titanal

Posted: Fri Oct 04, 2019 2:02 am
by mammuth
acid & vds rubber. you need to break the oxidation layer and keep a flexible bonding

Re: Section8-titanal

Posted: Fri Oct 04, 2019 8:54 am
by skidesmond
Depending on where you're getting your titanal it should be treated already. Also use VDS rubber on each side, it seems to help in bonding and provides a sheer layer just like for your edges. If you're using a super high grade AL then you'll want to treat it with acid. It will pit the AL which helps bonding.

Re: Section8-titanal

Posted: Sat Oct 05, 2019 11:46 pm
by mowgli1996
skidesmond wrote: Fri Oct 04, 2019 8:54 am Depending on where you're getting your titanal it should be treated already. Also use VDS rubber on each side, it seems to help in bonding and provides a sheer layer just like for your edges. If you're using a super high grade AL then you'll want to treat it with acid. It will pit the AL which helps bonding.
Thanks! What kind of acid is used?

Re: Section8-titanal

Posted: Mon Oct 07, 2019 4:21 am
by mammuth
Phosphoric acid you can use. Btw the treatment from factory doesnt hold very long. This from the experience of some friends who are working with this material

Re: Section8-titanal

Posted: Wed Oct 09, 2019 5:51 pm
by rnordell
Phosphoric Acid Anodize (PAA) is one of the best bonding preps out there. Pretty much the "gold standard" for metal bonding prep. At work we have PAA done on aluminum coupons for adhesive characterization tests that we use in the Inston tensile tester. As an alternative I have had good results using a chromate conversion coating as a bond prep on aluminum is skis. Search for MIL-DTL-5541. Acid etch and Alodine is a common trade name for this process.