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Old 12-25-2007, 04:33 PM   #11
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Originally Posted by mattmartindrift View Post
it's not recommended as most (if not all) fibers have been manufactured and surface treated to be compatible with epoxies, not ester-based resins.
That would explain the delamination.
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Old 12-26-2007, 03:39 AM   #12
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That would explain the delamination.
No, the fact that kevlar doesn't adhere to any resin very well would be the explanation.
Fibers for general purpose use are compatible with esters and epoxies.
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Old 12-26-2007, 02:46 PM   #13
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TET this tests are amazing. Really we need to make this test and with different resins. It is very important for us because we need to have such these examples. You see it's not very easy to find this kind of lbs meter machines.

One question, what is the size of these panels? it's very important.
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Old 12-26-2007, 03:14 PM   #14
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it's not recommended as most (if not all) fibers have been manufactured and surface treated to be compatible with epoxies, not ester-based resins.
as I found out with the Saertex material....not sized for VER.
Which explains my interlayer debonding!!!
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Old 12-26-2007, 04:41 PM   #15
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should always call the manufacturer, but i'd say 80-90% of carbon fiber is produced for industrial/military use, which consequently use epoxies.

Working with pigments (TiO2), I know how much a "simple" surface treatment or "slight" manufacturing difference can totally alter the properties of said material and it's compatibility with whatever suspension/resin/etc. with which it comes into contact.


We use vastly different treatments/manufacturing conditions when making TiO2 for paint resins, thermoplastics, coatings, or thermal-insulation bricks.
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Old 01-01-2008, 09:27 PM   #16
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The laminate schedules used can greatly affect final strngth as witnessed. Us the tests TET has done to further your knowledge of impact resistance,load bearing,core assistance in strengh values.
This can be very helpful in deciding a layup schedule/plys etc.It certainly promted some thoughts for some of my parts in process.
Thanks TET for the time .
Cheers,V'.
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Old 08-10-2008, 07:01 AM   #17
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Hello, that results is with Hs Module or standard ?
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Old 09-09-2008, 03:27 AM   #18
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...
we made up some small test samples and took them to a lab to be tested. ....
We'll be producing more samples to test in tension and compression. Those companies selling cheap cosmetic carbon parts don't have this data to back up their products!
AWESOME! Is the lab nearby (in SOCAL)? Looking forward to the next segments - tensile test, then compression. The report would be nice but I know how that goes!
Sent you a PM.
Cheers - Jim
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Old 09-09-2008, 08:42 AM   #19
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AWESOME! Is the lab nearby (in SOCAL)? Looking forward to the next segments - tensile test, then compression. The report would be nice but I know how that goes!
Sent you a PM.
Cheers - Jim
We don't have a lab in my own company since there's no need for it. Generally use local labs. But most of the companies that I consult for have in-house labs and I can test a bunch of stuff when studying manufacturing defects and doing employee training.
Got your PM, just been super busy. Remind me if I don't get back to you soon.
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Old 09-21-2008, 10:31 AM   #20
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Thanks for that great information. I usually lay up my parts with no idea how strong they are going to be until they are cured. Then I have to add more carbon without getting that chemical bond I would've gotten if I had the right amount to begin with.

Or I end up using more than necessary.

Either way - my finished piece is heavier and weaker than it could be.

So seeing this data makes things a LOT easier to figure out the first time.
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