Plastic that can withstand boiling - 200 cycles
Plastic that can withstand boiling - 200 cycles
(OP)
I'm looking for a plastic that can withstand 200 boiling cycles (15min each). It also needs to hold a colour and be high gloss (think consumer medical product).
I've tried high heat ABS with a DTUL above 100°C, but apparently HH ABS is only good in a dry heat. I'm looking for something similar to ABS that can withstand boiling.
It doesn't need to be autoclavable if that helps.
Thanks,
Adam
I've tried high heat ABS with a DTUL above 100°C, but apparently HH ABS is only good in a dry heat. I'm looking for something similar to ABS that can withstand boiling.
It doesn't need to be autoclavable if that helps.
Thanks,
Adam






RE: Plastic that can withstand boiling - 200 cycles
RE: Plastic that can withstand boiling - 200 cycles
I would also like to ask if anyone has been successful using high heat ABS for applications that require boiling?
RE: Plastic that can withstand boiling - 200 cycles
TPX if you can get it.
Styrene Malec Anhydride.
Modified PPO maybe.
Regards
Pat
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RE: Plastic that can withstand boiling - 200 cycles
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RE: Plastic that can withstand boiling - 200 cycles
Regards
Pat
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RE: Plastic that can withstand boiling - 200 cycles
My initial suggestion would be to have a look at SAN (Styrene Acrylonitrile) - it's used a lot for reusable kitchenware, it's pretty cheap, colours well, has high gloss and a piece of cake to mould. I would suspect that there are also medically approved grades made by someone. (Well, I know there are...)
Cheers
H
www.tynevalleyplastics.co.uk
Why be happy when you can be normal?
RE: Plastic that can withstand boiling - 200 cycles
H
www.tynevalleyplastics.co.uk
Why be happy when you can be normal?
RE: Plastic that can withstand boiling - 200 cycles
My experience with SAN is that it is very brittle and won't pass a drop test. Can it be modified for impact?
RE: Plastic that can withstand boiling - 200 cycles
Cheers
H
www.tynevalleyplastics.co.uk
Why be happy when you can be normal?
RE: Plastic that can withstand boiling - 200 cycles
By my last post I forgot the medical/gloss thing.
Hydrolysis resistant nylon won't do.
I'm still inclined toward PP. It works in electric kettles.
Regards
Pat
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RE: Plastic that can withstand boiling - 200 cycles
RE: Plastic that can withstand boiling - 200 cycles
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
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RE: Plastic that can withstand boiling - 200 cycles
RE: Plastic that can withstand boiling - 200 cycles
H
www.tynevalleyplastics.co.uk
Why be happy when you can be normal?
RE: Plastic that can withstand boiling - 200 cycles
Check out the metallocene PP's - some have quite high stiffness and low warpage compared to usual stuff.
H
www.tynevalleyplastics.co.uk
Why be happy when you can be normal?
RE: Plastic that can withstand boiling - 200 cycles
Also you say medical, but give no information as to human contact involved For all we know it could be the door knob on the door in a doctors office. OK a stretch, but really we are guessing a lot here.
Regards
Pat
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RE: Plastic that can withstand boiling - 200 cycles
Could anyone comment on the feasibility of using PBT or POM? On paper they look good, but there must be disadvantages to both, I'm just not sure what they are.
Thanks for all the ideas!
RE: Plastic that can withstand boiling - 200 cycles
Same deal for polycarbonate. Hydrolysis resistant grades of PC are used for beer glasses in hotels where the patrons can't be trusted to not break them and use the broken glass as a weapon. They have a fairly limited life due to dishwashing, but it still exceeds the life of glass lost to breakage in rough hotels.
Regards
Pat
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RE: Plastic that can withstand boiling - 200 cycles
I used to design kettles for a living
On life test (1000's of cycles) PP is the by far the clear winner, try for yourself buy a PP kettle and hold the button down.
And it is cheap!!! PP does have a bad name but when it is designed and moulded correctly the end results are fantastic, but remember it does expand when hot so design accordingly.
Cheers,
Wayne.