Recent content by JPC10

Does anyone have any process experience with C-Flex MHR SEBS material? Having issues and investigating whether the material expands / shrinks with cooling and stresses applied to it. Any help would be appreciaited.

Thanks for reply Pat. I've got an FTIR carried out on the powder and it appears to be POLY(OXYTETRAMETHYLENE), POLYETHER. Is this common for this to leach out? What influences it or are certain factor that accelerate it?

Has anyone ever come across a powder from Pebax. I've moulded parts and after approx 2 weeks, there's white powder on the parts. Also, I have found a similar powder in the material stainless steel dryer hose. Do anyone know if there's a reaction occuring within the resin? JPC10

Thanks Demon3.

The setting are for the Moisture analyser. I have a MB35 moisture anaylser and I want to set up specific programs for PC, Pebaxs, etc. (Example for PC, start temp 140C for 5 mins) The analyser will weight before and after the program has finished. It's part of incoming inspection paln to monitor...

Would anyone know where to obtain recommended setting (Drying Temperature & Drying Time) for carrying out moisture tests on polymer resins (PC, PA 6, PA 11, PA 12, ABS, Pebax's etc) JPC10

My question is in relation to annealing. Would excessive annealing cause degradation provide the temperature is kept 30C below the glass transition temperature Tg?

I'm glueing a Pebax 72D tube to a PC touhy borst with UV light and I'm getting poor results. I'm getting lots of voids and bubbles after curing. It looks like the glue is delaminating from the Pebax. It's a Dymax glue and the glue gap is 0.5mm. I've tried adjusting light intensity, distance from...

I've tried using Sunflower oil with lecithinand it works well but can't use it. Has to medical grade release (biocompatibilitly etc).

I'm putting an angled/tapered tip onto the end of a Pebax 55D tube. This involves clamping the tube, inserting it into a die (0.105” diameter) and heating it for 10secs. Excess flash is removed and the part is then removed. Removing the part is proving difficult. I’ve tried using other injection...

Does anyone know other processes used to flow pebax's over a PTFE liner? Currently using vertical heat shrink but having problems. Thanks

Have draw polished the mandrel. Our current method of removing the mandrel involves placing mandrel through a small hole that acts as an end stop for the pebax tube. Clamp the mandrel and manually pull it out on a slide. (requires a small amount of force). Have also tried clamping the whole...

Still having no luck, even heating mandrel. Tried relaxing in oven as well. Waiting on different mandrels to come to try out. Thanks

Have tried coating the mandrel with silicon but still no luck. PTFE is etched, so thinking it might be causing problems (might try larger wall thickness to improve the strength), also the compression for the FEP might be a little excessive causing the pebax/liner to adhere to the mandrel. Will...

Hi Pedro, I'm currently putting a PTFE liner onto a mandrel, then putting 3 different types of pebax over the PTFE, covering the Pebaxs with FEP and then reflowing the pebaxs so that they join together using a vertical heat shrinker machine. When the part is cooled I remove the mandrel. Removing...