Hi Bev,
at 40°C not pbm at all for both : every kind of Plastic Reel (7", 13" etc)
and not pbm for every kind of Carrier Tape (Plastic or Paper Tape), and for
sure 40°C is not harmful for Cover Tape sealing, (thermal sealed method) the
pull strength of the cover tape will get effected very little or nothing at
all at 40°C.
In case of Cover Tape PSA (Pressure Sensitive Activation), the one you can
peel easily by hands (sticky one), at 40 °C could be effected, but not so
much.
Ordinary Tape and Reeled components can withstand baking temperature of 40°C
w/o any problem. Include LED.
Gabriele
-----Messaggio originale-----
Da: TechNet [mailto:[log in to unmask]] Per conto di Bev Christian
Inviato: martedì 25 maggio 2010 12.15
A: [log in to unmask]
Oggetto: Re: [TN] R: [TN] Baking parts
Gabriele,
Thank you for being the first to answer. However, for my case, why do you
preface your answer with "it depends"? The temperature I mentioned was 40C
and you are talking about 60C and above. Have you personally seen warpage
at 40C?
Technetters,
Warpage at 40C? Or glue problems - loss of adhesion, too much adhesion, glue
migrating to solderable sufaces of comonents? Again, I am asking about 40C,
not higher temps.
Bev
RIM
----- Original Message -----
From: Gabriele Sala <[log in to unmask]>
To: 'TechNet E-Mail Forum' <[log in to unmask]>; Bev Christian
Sent: Tue May 25 02:40:25 2010
Subject: R: [TN] Baking parts
Hi Bev,
it depend of kind of plastic material the reels are made. Most of the reels
are made by (PE-Polyetilene, PS Plystirene,..) and this can withstand
around Max 60-65°C without get warped. Then there are reel made by (PC)
Polycarbonate, (some time blended) they can withstand 150°C. Very expensive
an used only by those who may be need to bake parts already in Tape & Reel.
For sure, in that case the Carrier Tape is made also by Polycarbonate and
Cover Tape also is kind of material that can withstand the high baking
temperature( 110-140°C).
Check on your Reel and look for : PE, PS,PC, PVC (bad), etc
Regards
Gabriele
-----Messaggio originale-----
Da: TechNet [mailto:[log in to unmask]] Per conto di Bev Christian
Inviato: martedì 25 maggio 2010 2.43
A: [log in to unmask]
Oggetto: [TN] Baking parts
TechNetters,
Have any of you heard of reels that can't be baked at 40C?
BEV
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