×
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

Problem in Shenzhen

Problem in Shenzhen

Problem in Shenzhen

(OP)
Folks,
Our first injection molded product in China on a deadline and the molder having problem with part being too brittle. The material is PETG and he added a "concentrate" which seemed to solve the brittle problem but then when colorant was added the parts are brittle again. Part is long and skinny - 18" by 1/8" diameter rod. Am needing a materials expert to correspond or else boots on the ground consultant in Shenzhen area. Anyone able to help or have suggestion on finding local expert??
Thanks.

RE: Problem in Shenzhen

Change the colour formulation. At least one of the components is influencing crystallisation badly.

Another possibility is that the colour component is carrying water into the material. Dry the colour before using it.

Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules

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