Bubbles forming during pebax reflow

[D Clubb]

Hello All,

I have a catheter process creating bubbles in the catheter walls.

The process is essentially pebax onto pebax reflow (fusing). There is a SS
braid in between the pebax materials and FEP is used as the outside
heatshrink.

The shaft is heated in a vertically translating hot air nozzle shrinker to
above the pebax melt temperature.

Pebax in question is 55D.

I'm having trouble determining cause of the bubbles.

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[mirajd...@gmail.com]

hey i am having similar issue and might have a solution. email me back and we can get in touch and talk about this over phone call

[jgelsi...@gmail.com]

I realize this was a year ago,but did you guys find a solution to this problem. Im having a similar issue with a 40D pebax resin. thanks

[aceof...@gmail.com]

On Wednesday, September 9, 2015 at 3:56:12 PM UTC-7, jgelsi...@gmail.com wrote:
> I realize this was a year ago,but did you guys find a solution to this problem. Im having a similar issue with a 40D pebax resin. thanks

Didn't find a solution sorry. On-going issue.

[ReflowMaster]

replying to aceofclubbs, ReflowMaster wrote:
Hi all, bubbles are a lot of times fixed with pre-shrinking the FEP before
reflowing, also, try increasing time or temperature of reflow oven in 1% rate
per try.

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[David Liu]

we have encounter similar problem with PA 12, is any solution to this problem

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