>Thanks for answer, Marianne,
I will ask the manufacturer as you indicate. Werner Engelmaier is of
different opinion. He thinks we exaggerate the problem. Huge and heavy
and complex structures are being built with thermoplastics, and they
keep adhesion despite hot ambient conditions. Thanks again.//Ingemar

--------------------------------------------------------------------
 No optimism here.
>
>  If the maximum Tg is 75 C, it is quite possible that the beginning of
the
> glass transition zone is in the 60 C range.  Softening and loss of
> positional registration can therefore occur.
>
> To verify whether this particular product is useable in your operating
> environment, you may want to have the material analyzed to determine
where
> the onset of softening occurs, and to ask the supplier for their
> manufacturing process tolerances on the thermoplastic.  Or run your
product
> through reliability testing.
> ____________________________________________________________
> Marianne Romansky
> Process Development Scientist
> Celestica (Toronto) Inc.
> Phone: (416) 448-6284
> Email: <a href="/scripts/wa.exe?LOGON=A3%3Dind9811%26L%3DTECHNET%26E%3D7bit%26P%3D1291716%26B%3D--%26T%3Dtext%252Fplain%3B%2520charset%3DUS-ASCII%3B%2520name%3D%2522Re%3A%2522%26N%3DRe%3A" target="_parent" >[log in to unmask]</a>
>

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