Contact US

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!

*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

Rubber magnet curie point question

Rubber magnet curie point question

Rubber magnet curie point question


I am developing a product which uses rubber magnets. The product will occasionally be subject to boiling water for short periods of time, as will be in a kitchen environment, frequently in the sink, when vegetables etc have their boiling cooking water poured away.

Are there rubber magnets on the market that are not affected by this for both the structure of the rubber and magnetic Curie point?

To be honest I have spoken to a number of manufacturers and I am getting mixed responses. I am unsure if this is because some are ill informed or perhaps are trying to persuade me to develop in the direction which fits their supply chain.

Any help would be very much appreciated.

Kind regards


RE: Rubber magnet curie point question

Rubber magnets usually are made of Ceramic (Ferrite) magnet material in a rubberized binder. The Curie point of Ceramic magnets is 450oC, so you don't have to worry about boiling water demagnetizing the magnets.

What you will probably have to worry about is the water affecting the rubber binder. There are so many different formulations, most magnet providers probably don't want to issue a blanket statement saying the binder can survive long term exposure to boiling water.

My suggestion is to buy some samples from a reputable supplier and test them yourself. If you can run a continuous stream of boiling water on the samples for a couple of hours, you can be reasonably certain they'll survive most normal kitchen environments.

RE: Rubber magnet curie point question

Get people to tell you at least what resin they are using. If they won't even tell you the generic type of binder (and rubber is not close enough) then move on.
Mike is right, the magnet is not the issue, the binder is. Put them in your rice steamer and cook them overnight. If they are crumbling move on to another source. Many rubber resins have decent water resistance.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Rubber magnet curie point question

Thanks to you both for your assistance, I will focus on the rubber binder as suggested.

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! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close