Section8-titanal

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

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ruchika
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Re: Section8-titanal

Post by ruchika » Wed Apr 17, 2019 1:25 am

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.

skidesmond
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Re: Section8-titanal

Post by skidesmond » Wed Apr 17, 2019 6:15 pm

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.

jorgepp
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Re: Section8-titanal

Post by jorgepp » Sat May 18, 2019 10:10 am

Thanks for the information.

mowgli1996
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Re: Section8-titanal

Post by mowgli1996 » Thu Oct 03, 2019 5:36 am

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

mammuth
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Re: Section8-titanal

Post by mammuth » Fri Oct 04, 2019 2:02 am

acid & vds rubber. you need to break the oxidation layer and keep a flexible bonding
Tom

skidesmond
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Re: Section8-titanal

Post by skidesmond » 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.

mowgli1996
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Joined: Wed Mar 27, 2019 3:56 pm

Re: Section8-titanal

Post by mowgli1996 » Sat Oct 05, 2019 11:46 pm

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?

mammuth
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Re: Section8-titanal

Post by mammuth » Mon Oct 07, 2019 4:21 am

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
Tom

rnordell
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Re: Section8-titanal

Post by rnordell » Wed Oct 09, 2019 5:51 pm

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.

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