Help: Advanced Polymers - Selection and Comparison
Help: Advanced Polymers - Selection and Comparison
(OP)
Hello, I wonder if any of you guys can help point me in the right direction. I'm looking for a material with the following parameters:
> ~2" Diameter Tube
> Excellent Chemical Resistance
> Low density
> Electrical Insulator
> 200 Deg. C Service Temp for <15mins
> 1 Bar.G internal pressure
> 100mBar internal Vacuum
> Pressure & Vacuum will be cyclic in nature
> Can be machined (Sealing features etc)
> Possible need for Epoxy style bonding
I've been suggested PEEK as one option, but the cost is quite high. Are there any others that may well meet the required specification, but come in at a lower cost?
Also are there any good reference sites / documents out there that compare the parameters of advanced polymers but include cost guidance? http://www.dotmar.com.au is excellent, but I can't see any cost info.
Regards,
Lee
> ~2" Diameter Tube
> Excellent Chemical Resistance
> Low density
> Electrical Insulator
> 200 Deg. C Service Temp for <15mins
> 1 Bar.G internal pressure
> 100mBar internal Vacuum
> Pressure & Vacuum will be cyclic in nature
> Can be machined (Sealing features etc)
> Possible need for Epoxy style bonding
I've been suggested PEEK as one option, but the cost is quite high. Are there any others that may well meet the required specification, but come in at a lower cost?
Also are there any good reference sites / documents out there that compare the parameters of advanced polymers but include cost guidance? http://www.dotmar.com.au is excellent, but I can't see any cost info.
Regards,
Lee





RE: Help: Advanced Polymers - Selection and Comparison
What lengh tubes.
What wall section.
What chemicals.
Depending on how you answer above,FRP, Phenol formaldehyde, GF nylon 6.6 or GF nylon 4.6 or GF aromatic nylon, GFPPS, GFPTFE
Regards
Pat
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RE: Help: Advanced Polymers - Selection and Comparison
We're completely at the concept stage at the moment, and hence fully defined specification is still not quite there.
> The length our R&D guys are asking to test with is around 400mm.
> The wall section will need to be sufficient to withstand the pressures so is material choice dependent, so I don't have a figure for that at the moment.
> Its for an air filtration system, so a broad range of chemicals, Acids etc could all be present at some point. I have the chemical list, but I am unable to disclose.
It was more some other alternatives to look at that I was fishing for, and you've given me some of those, so thanks. What I'm still lacking though is a comparison of purchase and processing costs associated with each type.
Regards,
Lee
RE: Help: Advanced Polymers - Selection and Comparison
Initial prototype stage could be upwards of 100 tubes maximum. Full production could well be in the 1000's possibly even into the 10,000's.
Regards,
Lee
RE: Help: Advanced Polymers - Selection and Comparison
Ryton (PPS).
Here is the home page for Ryton.
http://
You might want to touch base with the following company as they carry a complete cross section of engineering plastics.
http://www.quadrantepp.com/default.aspx?pageid=46
The following can make good sized cylinders from most moldable plastics. Check the available dimensions in the paragraph.
"Compression Moulded Plastics"
http://www.cdipolytek.com/processes.html
This company did offer tube/cylinders
http://www.tetralene.com/Ryton.htm
RE: Help: Advanced Polymers - Selection and Comparison
Regards,
Cory
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RE: Help: Advanced Polymers - Selection and Comparison
The PTFE for the chemical and temperature resistance and the FRP to give the required physical strength. Filament winding might work to apply the FRP.
When comparing temperature resistance and chemical resistance data, remember to allow for stress and for the chemicals at the temperature involved.
Regards
Pat
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