×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

Low CTE Rapid Prototype Polymer

thread334-460528

Low CTE Rapid Prototype Polymer

Low CTE Rapid Prototype Polymer

(OP)
Hi,

I am looking for a low CTE polymer for rapid prototyping. This polymer can be filled (glass, carbon fiber, etc).

I need it to have a CTE around 15 ppm/deg C. It also need a glass transition temp, T_g > 100 deg C.

I have found Ultem 1010 and Ultem 9085 satisfy the T_g requirement, but have larger CTEs of around 45 ppm/C.

PEEK also satisfies the T_g requirement, but all variants I have found have a larger CTE than 15 ppm/C.

Does anyone know of any 3D printable polymers that satisfy these requirements?

Thank you!

RE: Low CTE Rapid Prototype Polymer

To get to your target CTE the polymer would need to be filled to greater than 60% by volume. At such high filler levels the material no longer behaves as a liquid, and this severely limits the way that shapes can be formed. Compression molding of powders becomes the most common approach. You will probably not find injection molding grades with very low CTE.

RE: Low CTE Rapid Prototype Polymer

Never mind, just saw that its glass transition temp is too low for your use case.

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

Resources

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