Hello,
Has anyone tried this material yet? I have no commercial ties with this company, just posting it in case someone is interested. I have been looking at what materials are available on the market that can be used on surfboards. I found the video below that shows a pickup drive over a surfboard LENGTH wise, with no apparent damage to the board. The material is cheaper than most high performance materials, and may be worth looking into. They claim it is 15-30% lighter than glass, and is cheaper than S-glass.
http://www.innegrity.com/surfboard/index.htm
"The surfboard was made with eps foam, 1 layer of Innegra™ and 1 layer of 4oz fiberglass, laminated with epoxy resin. We were very surprised how well the Innegra board took the driving over. We thought the best case would be the glass would hold up but the foam would compress. To our amazement there was no compression dents!”
http://www.innegrity.com/MarineComposites.htm
The world will never know C D D it will be a ledgend like the man who created it!
Looove the look of that cloth under glass. I’m really interested in the cdd blank, too, but I’m geographically undesirable for that option.
Is that an epoxy layup?
i tried a blend that every other strand in the cloth is fiberglass so wet out was pretty easy - the fiberglass cloth wet out but the innegra does not - gives a cool look - maybe easzier to work with for a hand layup than the 100% innegra?
is the stuff you guys are using 100% of the polypro material?
i posted a couple pics of the board in the wmd thread (it has a bamboo deck).........
I am making one now with this cloth.
I have lamed the 4oz Ineggra layer over the whole board, had a few hangers - the cloth does not like to be sanded. I brought it up to a 600grit and it looked like normal. dropped the probox in and I should be done by the weekend. I am going to put 4oz E over the cloth. I had bubbles from the tail edge where the cloth did not lap correctly so that was a pain to fix but the other lap took care of it after sanding.
So far it seems relatively strong, my finger does not dent the board if pressed down (to an extent) but I do not think the fiber that I am using is the tightest that they have. It looks more like a volan and loose weave.
Ill post up some pics when I get finished.
There's a whole world of advanced fibers and weaves out there.
Hello Mike,
Very true, lots of materials out there, and I've never used any "Advanced Fibers", or even epoxy for that matter. The last board I built was in 1983, polyester and glass, and Kevlar was one of the newest and most advance availble materials.
I thought that the video was pretty impressive though, as any conventional polyester board would have quickly turned to roadkill with a truck rolling over it.
Regards,
Montie
Somebody used it in the WMD thread.
I haven't tried myself but, like you, I'm pretty intrigued. There was a little feature about it in the August issue of Composites Technology magazine including comments from Greg Loehr. Definitely appears to have potential. But as has been pointed out, the choices with composites are endless. Sooooo many ways to skin a cat.
I have no commercial interest whatsoever. I get the Composites mag because it had a free online subscription and I figured why not. But for those interested, I think it's supposed to be available soon through Graphite Master.
I may be incorrect, but I believe this is cloth is a variation of polyethylene. I think a major issue is adhesion, the resin may not stick very well to the cloth. Take a look at a table of modulus of elasticity though, and you will see polyethylene right up at the top.
I only glanced at their literature but I’m pretty sure it was polyproplyene (PP) not polyethylene (PE). I have read that PP is subject to degradation from UV though, so query the clear board in the video (or maybe it was painted white?)
[img_assist|nid=1046207|title=innegra|desc=|link=none|align=left|width=640|height=480]havent had time to try it
this is 2 oz
will let ya know?
Plus One is using the fabric according to their website. Maybe he has a few tips for us.
I looked at all the data from their charts but I did not come up with a real clear picture of the pros/cons. It seems the resistance to impact damage is high, but am unsure about how much strength it adds to the lam. Any mech engineers out there that can translate?
Anyone know how well it wraps rails?
CJ
Montie,
I am just now finishing a board with 4 oz plain weave Innegra S. The core is 1.9 # EPS stringerless (from block foam). I used a layer of 4 oz over the Innegra cloth top and bottom. It makes for a light board that is very durable with good flex. No vacuum bagging required. The Innegra cloth didn't seem especially difficult to wet out but don't plan on wrapping it around any hard edges. Its like Kevlar in that it doesn't sand. It makes a very bright white board and adhesion with epoxy is excellent. It is going to be a little more expensive than S glass I believe. Seems to have a lot of potential and is recyclable. BTW it is polyproplyene.
regards,
Dave_D
Alright, I'll spill a little....
Since Eric and Kirk are THE fiber guys, they've seen it all.
Coil first tested this fiber in the Brasington's proprietary vac-lam process 2 years ago. Two boards went to Puerto Rico for long-term use. Lots of test panels using different weights and weaves also. I looked at some of them today.
Ballistic-tough, low specific gravity, small-diameter individual fibers. Sorta cream-colored, off-white (not transparent).
One of many choices....
Hey MD, Aren't Island surfboards down at Ocean Sport's world?
Hey...Nissan Pathfinder...Same as mine! Looks like fun.
There is a limit to how much any cloth alone will impart strength in one thin layer...
Polypropylene...that'd stretch rather than shatter...could be good on top of a nice bouncy EPS, but maybe too flexible...
And Dave-D..."does'nt sand" does'nt sound good. But obstacles are there to be overcome...
Got any spare Huie? I'd give it a bollocking.
Josh
What’s the dent quotient in a lam with a single layer of 4oz?
We did a bunch of SUP's with it. Very hard to work with and for rails on a shortboard you will need a vacuum. Does not wet out very easily. However it is strong and light. It was expensive. Very.
Typical Properties:
INPUT YARN: High Modulus Polypropylene
FIBRE TYPE: 940 Denier Innegra™ S
WEAVE: 4 Shaft Satin
WEIGHT: 135 g/m² (Nominal)
THICKNESS: 0.34 mm (Nominal)
WIDTHS: 685 & 1000 mm (Nominal)
FINISH: Loomstate
ROLL LENGTH: 100 mtrs (Nominal)
PACKAGING: Full width rolled on tube
plastic wrapped and packed
in cardboard carton
Options:
Alternate widths, lengths and tracers available on
request
Applications:
- Composite laminates using
Epoxy, Polyester or Vinyl ester
resin systems.
High Performance Composite Reinforcement
Issue Date 23/3/09
Features & Benefits:
- Good drapeablilty & easy to handle
- Fast wet out capabilities
- Cost effective
- Very low density (lightweight)
- High tensile modulus
- Increases impact resistance
- High wear & toughness (not brittle)
- Chemical, Water & UV resistant
- Excellent dielectric properties
ENGINEERED TEXTILES WOVEN IN AUSTRALIA
hey josh i will e mail you monday
**fellas this is not the same fabric that was doing the rounds a year or so ago?
**
Hello Gents,
Good to see some sharing of information here. One note on Armid (Kevlar) fiber finishing/sanding. I work for a cable manufacturer; one of our products is a 100 metric ton break strength cable for a marine application which uses Aramid fibers for the stress member. We build cable cross section samples on occasion, and yes the Kevlar is very difficult to work with, it frays/fuzzes when you grind it, it frays when you sand it also.
I recently used our metallurgical lab for prepping samples. A diamond saw with water makes a pretty clean cut on the Kevlar (slow cutting speed). I have also used our metallographic polisher to further clean up the samples. It is a horizontally mounted sanding disc that has a constant flow of water onto the surface of the sand paper. I don't recall what grit I started with (about 220?), but with the water flowing on the sandpaper the Kevlar does not fuzz up. I worked up on grit finish to about 600-800 grit and the Kevlar polished up nicely.
I have no idea if this could help on a surfboard, perhaps a small amount of water flowing across the glassed board and wet sanding by hand or disc could work. I would not experiment on a board with this, perhaps a piece of scrap. No guarantees but it may work.
Best regards,
Montie