Previous in Forum: ASTM A395 Annealed Ductile Iron Casting - "wild" % Nodularity Values   Next in Forum: Analysis of Producer Gas from Bituminous Coal
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
4 comments
Rate Comments: Nested
daniel007
Participant

Join Date: Dec 2011
Posts: 2

Time Taken

12/28/2011 10:59 AM

hello everybody,

i needs help, how to determine/know the time taken for teflon@PTFE to expand at certain temperature. lets say at 500 degree celcius, what time for teflon@PTFE to take for it to expand about 1mm.

if there have a formula to determine this problem? or the standard table to be refer?

thanks engineer!!
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Doorman
Guru
Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

Join Date: Apr 2009
Location: Yellowstone Valley, in Big Sky Country
Posts: 7425
Good Answers: 295
#1

Re: time taken

12/28/2011 11:15 AM

PTFE has a melt point of 327°C.

Please reconsider your parameters and restate your question.

__________________
 Semper Ubi Sub Ubi
Register to Reply
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#2

Re: time taken

12/28/2011 11:22 AM

Thermal expansion is the amount something grows as heat is added, or removed.

Everything does it but the rate is different, depending on the material. Typical rates for polymers is around 50-100 parts per million.

Coefficients of Linear Thermal Expansion
Register to Reply
phoenix911
Guru
Hobbies - CNC - New Member Hobbies - DIY Welding - New Member Engineering Fields - Electromechanical Engineering - New Member

Join Date: Aug 2007
Posts: 23647
Good Answers: 420
#3

Re: time taken

12/28/2011 11:22 AM

Your looking for dimensional stability.

Check manufacturers specs.

The distributors (websites possible) should have a table on the physical/mechanical and thermal properties on it.

__________________
 “ When people get what they want, they are often surprised when they get what they deserve " - James Wood
Register to Reply
daniel007
Participant

Join Date: Dec 2011
Posts: 2
#4

Re: Time Taken

12/28/2011 11:57 AM

thanks everybody for ur cooperation!!
Register to Reply
Register to Reply
Have a Different Question?
4 comments
Copy to Clipboard

Users who posted comments:

daniel007 (1); Doorman (1); lyn (1); phoenix911 (1)

Previous in Forum: ASTM A395 Annealed Ductile Iron Casting - "wild" % Nodularity Values   Next in Forum: Analysis of Producer Gas from Bituminous Coal

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Chemical & Material Science:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (78 right now)
Show Members
Advertisement