Core Material

[Dougw]

I had originally thought I was going to go with Coosa Bluewater 26 as my coring material for stringers and knees. But.... In my area it is virtually impossible to get - at a reasonable cost. I did locate some Bluewater 26 a 3/4" 4x8 sheet for 214.00 which is a great price until they added 100.00 shipping charges. I have a local source for BalTec products. Specifically the AirEx PXc and PXw in their product line up. These are not sandwich core materials. I am waiting for pricing information on the BalTec stuff and in the end it may be a wash with the coosa price wise.

Anyone have experience with the BalTec line up? I could still go with the Coosa and will if it's is the best product for the application. Just trying to decide which way to go.

[FUJIMO]

have you researched CoreCell availability/price in your area?

[Dougw]

No, I haven't. I've only got very limited knowledge of what is even available/advisable market wide....

[Steve 1]

Just looking at the data sheets the Airex PXc.385 should work just fine for a transom.

[Dougw]

Just looking at the data sheets the Airex PXc.385 should work just fine for a transom.

What about stringers/knees.... My transom is OK so just replacing what needs replacing.... Thanks!

[Steve 1]

you could use PCx.320 if you get a deal on it.

[OFFSHORE GINGER]

you could use PCx.320 if you get a deal on it.

and the bottom line is...................... shipping in the long run will KILL you considering we talked about this the other nite about shipping charges for the Coosa .

[OFFSHORE GINGER]

Steve 1 , i would like to wish you , your family , and loved ones a very safe and happy holiday's and take care old friend ................Artie

[Dougw]

and the bottom line is...................... shipping in the long run will KILL you considering we talked about this the other nite about shipping charges for the Coosa .

Composites One is in Houston... I can pick up local and from what the rep told me - In stock. But we did not talk price as he didn't know the price at the time.

[FUJIMO]

Composites One is in Houston... I can pick up local and from what the rep told me - In stock. But we did not talk price as he didn't know the price at the time.

Excellent!

[loop]

Composites One is in Houston... I can pick up local and from what the rep told me - In stock. But we did not talk price as he didn't know the price at the time.

Thats good info. I used to work about 2 miles from there on Cunningham rd.
Have you found any other suppliers for core matls in Houston?

[Dougw]

Thats good info. I used to work about 2 miles from there on Cunningham rd.
Have you found any other suppliers for core matls in Houston?

No... I haven't. Johnson Fiberglass in South Houston, College Ave. @ I-45, is where I've been getting my basic 'glass materials. All they have is Core Mat. I Called Coosa Composites and they said Composites One was a distributer but after finally gettting the number for the outside rep(they have no inside sales) I learned they don't stock Coosa.

Composites One web site kinna stinks as they don't really have much more than links to their suppliers. I wanted to compare tech specs of coosa against the specs of the Baltek AirEx PWc but.... Coosa doesn't post them saying instead if you've got questions - call'em.

[Steve 1]

Steve 1 , i would like to wish you , your family , and loved ones a very safe and happy holiday's and take care old friend ................Artie

Artie same back ,the very best to you and yours and many more.

[Dougw]

you could use PCx.320 if you get a deal on it.

The rep went to vector ply with some of my questions and you know how communications can break down.... Vectorply came back with a recomendation of 1208 and PXw. Being as I now had the vectorply reps email... I restated the question and they came back with 1708 and PWc 320.

The bi-ax I was looking at is KE-BXM 1708-5B X 50” which is a kevlar hybrid. Looking at the numbers on this when compared to straight E-glass the numbers did look better but I really didn't know if it was that much better, in my application, to bear the added expense and trouble. Sooo... just going with E-BMX 1708. Guess it'd help of I actually knew what I was looking at though.


The copy n' past function didn't work all that well. But the test catagory is listed first and the the corrosponding two sets of numbers side by side represent Infusion and open mold. The infusion testing was done with vinyl ester resin while the open mold test were performed with Poly ester resin.
Kevlar/E-glass 1708

Laminate Modulii(MSI) KE-BXM 1708 KE-BXM 1708
Resin Infused Open Mold
Ex 3.73 2.26
Ey 3.73 2.26
Gxy 0.50 0.29
Ex,flex. 3.46 2.09
Ey,flex. 3.46 2.09
Ultimate Stress
(KSI) KE-BXM 1708 KE-BXM 1708
Resin Infused Open Mold
Long. Ten. 61 37
Long. Comp. 49 30
Trans. Ten. 61 37
Trans. Comp. 49 30
In-Plane Shear 12 10
Long. Flex. 81 49
Trans. Flex. 81 49

E-glass 1708

Laminate Modulii
(MSI) E-BXM 1708 E-BXM 1708
Resin Infused Open Mold
Ex 2.94 1.86
Ey 2.94 1.86
Gxy 0.50 0.29
Ex,flex. 2.73 1.72
Ey,flex. 2.73 1.72
Ultimate Stress
(KSI) E-BXM 1708 E-BXM 1708
Resin Infused Open Mold
Long. Ten. 48 31
Long. Comp. 67 42
Trans. Ten. 48 31
Trans. Comp. 67 42
In-Plane Shear 16 10
Long. Flex. 73 46
Trans. Flex. 73 46
In-Plane Stiffness, "EA"
10^3 lb/in E-BXM 1708 E-BXM 1708
Resin Infused Open Mold
(EA)x 79 86
(EA)y 79 86
(GA)xy 14 13
Ultimate In-Plane Load
lb/in E-BXM 1708 E-BXM 1708
Resin Infused Open Mold
Long. Ten. 1,304 1,408
Long. Comp. 1,812 1,957
Trans. Ten. 1,304 1,408
Trans. Comp. 1,812 1,957
In-Plane Shear 446 439

Notes:

1: Resin infused laminate made with vinyl ester resin 200 cps viscosity @ 77º F.
2: Open mold laminate made with polyester resin.

3: All standard reinforcements should be infused with a flow aid or Vectorfusion® reinforcements.

[Steve 1]

The hybrid will work but I would go with a glass 1708 a couple reasons first E Glass has better elongation ,second better compressive strength and third cheaper ,Wait is the rest of the boat Kevlar?