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Looking for material
2

Looking for material

Looking for material

(OP)
Hi

I'm trying to identify new TPU material for my product application requiring excellent heat and abrasion resistant, most importantly it has to be resistant to a mixture of mineral oil/lubricant/surfactant/water. If possible, it would be milky white to yellowish in color.

For operating conditions, it would be interfaced with the solvent mixture mentioned above, running around 8000 RPM/min. The operating temperature range would be about 80 C to 95° C.

Thanks in advance for any advice.
 

RE: Looking for material

(OP)
Hi Pat

YES I already tried BASF C85A & C90A, unfortunately it quickly lost its strength/hardness under heating conditions with 8000 RPM/min. Right now, I have Noveon 58134, 58130, Bayer Desmopan 300/400 series, Huntsman A92K but still not quite up to client expectations thus would like to hear other  opinions to see if I can try other materials from Automotive engineering or Seals or I might have omitted something. Should I consider addictives?

(YES I am looking for 86~90A material)

Thanks.

JEM

RE: Looking for material

Are you sure you need PU and not some other elastomer, like PEBAX or polyester block copolymers.
PUs tend to be only moderate to high temperature and poor to water. I know there are a lot of grades and they cover a wide variation in properties. I am not familiar with the full ranges of properties offered and would simply be searching data sheets.

Regards
Pat
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RE: Looking for material

(OP)
Thanks PAT.

A quick look at PEBAX data I am a little concerned with its slightly low melting point 140 C/ abrasion properties, do you have any experiences with this type of material?

RE: Looking for material

My experience was 30 years ago.

Those vague memories had it down as a high temperature elastomer. I have no data at hand to check
I know polyester block copolymers have quite high temperature ratings, but they are somewhat harder than most rubbers.

Regards
Pat
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RE: Looking for material


Pat, I know the feeling - I must confess I had to ask the wife! It's been a few years since we used them.

Imo, a bit easier to process than TPU, although the drying is just as critical being a polyester.

H

www.tynevalleyplastics.co.uk

RE: Looking for material

(OP)
Thank you two experts.

JEM.

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