Since I paddle almost every day, I tend to leave my paddle in my Jeep and take only my board in and out.  It has been really hot in SoCal the past few days and it is occurring to me that staying in my Jeep, which sits in the hot sun while I'm at work, may not be good for my new carbon paddle, not sure.  Anyone have input?

Uh, this was post 666 for me.  Does that mean my paddle will explode and poke my eye out?

No, and no.

I wouldn't leave my blade propped up on the dashboard but I do leave my paddles in the car all the time, granted it is grey and 50 degrees in Michigan right now.

My paddle gets whacked a fair amount if I leave it in the car. Carbon does not like that and does not show the damage. Paddle snapped in half while paddling for a wave. Had not hit it at all that day. Cumulative damage from 18 months of use, I suspect much of the damage occured off the water.

Probably not really. Even low temp hot glue melts at 260F. Hi temp is 350 and more. The original stuff we used on Ke Nalu paddles softened at 380F. I don't know what they use now, but it's probably similar. Your dashboard would melt before the glue would. I don't really know why boiling water works for releasing five minute epoxy.

Quote from: PonoBill on September 12, 2014, 10:11:48 PM

I don't really know why boiling water works for releasing five minute epoxy.

PB,  Because water has a higher heat capacity than air.

Can I play?

This is pure wild ass guess on my part. Don't get made if I'm wrong, just give the correct answer.

I bet the quoted high/low temps for hot glue refer to the temp of the heating element in the gun.  That temp is not the actual melt point.  It is the working temp where the product has the right viscosity.

Melt point must be under 100C, but somewhere above it's operational temp range.

Here's the fun part.  I doubt this stuff is really solid at room temp. It is probably a super cooled liquid.  If you left a stick of this stuff on your desk for 50 years it would turn into a puddle.  It would be a hard puddle, but a puddle just the same.

Just put the paddle in a padded paddle bag, then the sun / heat shouldn't effect it

Can I play?

This is pure wild ass guess on my part. Don't get made if I'm wrong, just give the correct answer.

I bet the quoted high/low temps for hot glue refer to the temp of the heating element in the gun.  That temp is not the actual melt point.  It is the working temp where the product has the right viscosity.

Melt point must be under 100C, but somewhere above it's operational temp range.

Here's the fun part.  I doubt this stuff is really solid at room temp. It is probably a super cooled liquid.  If you left a stick of this stuff on your desk for 50 years it would turn into a puddle.  It would be a hard puddle, but a puddle just the same.

Sure.

There are actually hundreds of hot glue formulations, but generally hardware store low temp means 250F for the glue and common high temp is 350F. The guns run at 275-300F (150C) for low and 360-400F (180C) for high. I don't generally use the guns because they bring the glue barely above the melting point.

The really low temp EVA stuff like you find at fabric stores melts around 200F or even less, but it has paraffin wax in it and it's not suitable for paddles.

All hot glues remains tacky at temperatures much lower than when it first melted ("open" time), but once it has hardened it must be heated back to the melt temperature to be fully liquid again..

I imagine like most materials that both hot glue and epoxy get weaker as they are heated. Even when they aren't really melted they might get weak enough to debond.