Vacuum infusion for ski building, Core Matters and Cold Cure

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

Moderators: Head Monkey, kelvin, bigKam, skidesmond, chrismp

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MontuckyMadman
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Joined: Fri Jun 20, 2008 9:41 pm

Post by MontuckyMadman »

skidesmond wrote:Here's the link I was referring to earlier:
http://www.earsc.com/HOME/products/Damp ... sp?SID=353

Horse Shoe application: http://www.earsc.com/applications.asp?i ... arentid=43
well some of it comes in a 1mm thickness but bonding thermoplastics with compression epoxy will work? Dunno.
The lowest durometer one, and I didn't look at the other specs, has a poor temp rating and will most likely change dramatically with cold and curing temps I woulds assume.

Loook at the expansion at temps insane
sammer wrote: I'm still a tang on top guy.
skidesmond
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Location: Western Mass, USA
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Post by skidesmond »

MontuckyMadman wrote:
skidesmond wrote:Here's the link I was referring to earlier:
http://www.earsc.com/HOME/products/Damp ... sp?SID=353

Horse Shoe application: http://www.earsc.com/applications.asp?i ... arentid=43
well some of it comes in a 1mm thickness but bonding thermoplastics with compression epoxy will work? Dunno.
The lowest durometer one, and I didn't look at the other specs, has a poor temp rating and will most likely change dramatically with cold and curing temps I woulds assume.

Loook at the expansion at temps insane
Yeah, once I realized it was PVC on the horse shoes I wasn't so excited about it.
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chrismp
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Joined: Fri Feb 13, 2009 9:00 am
Location: Vienna, Austria

Post by chrismp »

we've been using polyurethane sidewalls since day one! they work really well! way tougher than uhmwpe, but they're really hard to machine. at least they put a lot of stress on the router/planer. with a sander you can't even scratch them.
the stuff we use is called adiprene lf950a. it's well suited for the purpose because it keeps it's good properties at low temperatures unlike other polyurethanes. only problem is that it needs to cure at 100°C for 16h.

we're planning on switching to a more eco friendly solution. a company called arkema produces a castor bean based polyurethane called pebax rnew which has really good properties.
it's meant for extrusion and only available as a granulate though...we'll see if we can just melt the granulate and use it as a resin.
i'll get a quote and instructions on how to use it from them soon...if anybody wants some i could include you in the order.
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