×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Low Friction Plastics

Low Friction Plastics

Low Friction Plastics

(OP)
I am looking for a plastic with a friction co-efficient of less than .15 yet has a Rockwell Hardness greater than 80.  Acetal has not had sufficient lubricity and we have tried Acetal with 2%silicon which is better, but we are looking for even greater lubricity.  It needs to be a class 2 material that does not emit or "leak".  

RE: Low Friction Plastics

What are you running it against. This can have as much of an effect as initial material choice.
One very happy combo is Acetal against Nylon, especially if the Acetal has Silicone in it and the Nylon has Molly and Graphite. I am not sure about the Class 2 Leakage.
Moulding conditions and additive packages , especially regards orientation and crystalinity can have signifficant effects on friction and wear.

Regards
pat

RE: Low Friction Plastics

(OP)
Typically, our product makes surface contact against is carpeting.  We have no control over the carpeting surface and it composition.  

RE: Low Friction Plastics

Difficult problem
Maybe something like bronze filled PTFE might be hard enough.
Maybe molly and graphite filled nylon 6.6 might be slippery enough.

Regards
pat

RE: Low Friction Plastics

high density polyethlyene is also pretty slick . Contact WL Gore . You can have your eqpt teflon coated as well . we use either a liner or a coating deoending on the application

RE: Low Friction Plastics

Try ultra high molecular weight high density polyethylene(UHMWHDPE). Check the DuPont web site.

RE: Low Friction Plastics

UHMW from one supplier is 67D Durometer/Rockwell R 64.  garlandmfg.com

RE: Low Friction Plastics

Ask Izovolta Group for such a material. You can find them on the web.

RE: Low Friction Plastics

The ceramic, boron nitride, could be added to the resin to instill greater lubricity as well as temperature stability.  It is also used as a mold release for an engineered resin at 8,000 psi and 800 F to make jet engine bearings and washers.

It is not appropriate in this forum to comercially promote a product, therefore if you require more information, please contact me directly on phoward@imscompany.com.

RE: Low Friction Plastics

Is this the phoward I used to work with at ICI in Sydney in the late 70's

Regards
pat

RE: Low Friction Plastics

Sorry Pat, no.  I was in Corpus Christi, TX in the late 70's. Regards, Phillip

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources