-
9th August 2017, 10:22 AM
#1
Percent Change in MFR after molding
I was wondering if there is a standard for the percent change in the MFR of a given resin after molding?
-
9th August 2017, 01:53 PM
#2
Re: Percent Change in MFR after molding
40% or less is what many molders look for.
KOM
brent
-
9th August 2017, 06:30 PM
#3
Re: Percent Change in MFR after molding
Yes, I have also heard some numbers. However, I am not sure if there can be a 'fixed' number. It would depend on a lot of factors: types of filler, % of fillers, length of the fibers of the fillers, the end use of the part, the starting MFI value - 10% of 25 is not the same as 10% of 75 and so on.
I suggest that you actually test 'degraded' resin and come up with your own number. Another point to note is that MFI is not the true representation of molding injection speeds.
Hope this helps.
Suhas
-
10th August 2017, 01:18 PM
#4
Re: Percent Change in MFR after molding
Mike Sepe has some excellent articles on this subject in "Plastics Technology"
Material testing series.
KOM
brent
-
11th August 2017, 07:17 PM
#5
Re: Percent Change in MFR after molding
Yes, Mike Sepe is THE BEST!
Suhas
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules