Very low operating temperature required
Very low operating temperature required
(OP)
Hi all,
I need a rigid polymer which is suitable for injection moulding and has a min. operating temperature of -60C / -76F.
The material needs to have some form of resistance to:
Salt spray
Sulphur
Ammonia
Potash - Pottasium Hydroxide
UV rays
Any suggestions you could provide would be helpful.
Thanks
I need a rigid polymer which is suitable for injection moulding and has a min. operating temperature of -60C / -76F.
The material needs to have some form of resistance to:
Salt spray
Sulphur
Ammonia
Potash - Pottasium Hydroxide
UV rays
Any suggestions you could provide would be helpful.
Thanks





RE: Very low operating temperature required
RE: Very low operating temperature required
You have applied a loose definition of rigid. Neither of those materials are considered rigid under most circumstances. I imagine one of the polyamide flavors could meet most of that list, of course the high performance ones like PPS and PEEK would too. A little more information about exposure (concentration, time) is necessary to know for sure.
RE: Very low operating temperature required
The prototypes that I have had made up are of Polymide, PA 66 (Nylon 66), so a similar set of mechanical properties would be preferable.
Tensile Strength: 90 N/mm2 [DIN53455]
Ball Indentation Hardness: 180 [DIN53456]
CoryPad,
I do not have any quantifiable information regarding the concentration of the above, however the parts will be exposed continously, and require resisitance to the list above, apart from UV rays.
RE: Very low operating temperature required
RE: Very low operating temperature required
RE: Very low operating temperature required
RE: Very low operating temperature required
Yes, PE and PTFE are as rigid as other elastomers, but why is the material selection restricted to elastomers? The request is for a rigid polymer and PE and PTFE are poor in that regard. While PA may have lower toughness, that requirement was not on the list.
RE: Very low operating temperature required
Nylon 12 might be suitable, given it's good chemical resistance.
It would be useful if the op indicated how many he wanted - one off? 1000 off?, 10 million?
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.
RE: Very low operating temperature required
This is new product, never been made by anyone before so I dont have any real sales figures im afraid but the discussions I have been in have been promising so I would be inlcined to say an initial batch of 10 000.
Iv just had a look at the datasheet for nylon 12 and that looks like it could be suitable to my needs.
Has anyone moulded with this before? Are there any potential pitfalls or points I should be concerned with/research?
Cheers
RE: Very low operating temperature required
An impact modified grade would take you to an even lower temperature.
Readily available from several manufacturers.
Due to comparatively low water absorption it's dimensionally quite stable. (As far as polymers are!)
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.
RE: Very low operating temperature required
I guess I just read minds. It's the requirement most people think of when talking about temperatures below about -40C/F, and it is the measureable property that changes most dramatically as temperature drops.
RE: Very low operating temperature required
Another interesting problem: Material for a living hinge at -40ºC?
Answers on a postcard please...
Cheers
H
www.tynevalleyplastics.co.uk
It's ok to soar like an eagle, but weasels don't get sucked into jet engines.
RE: Very low operating temperature required
RE: Very low operating temperature required
Tough one.
Maybe silicone rubber? Maybe just use a dead hinge (hit them over the head before installing them)?
Instead of a postcard, how about the answer on the back of a $20 bill (or UK equivalent)?
;)
RE: Very low operating temperature required