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Date: | Tue, 14 Nov 2000 14:27:40 +0200 |
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Brian
You do not have to go so far, If using pinless floating built-up
technique (riveting the inner layers without external prepregs) you will
easily create a situation where one prepreg will not align to other in 100%.
This also can cause to the glass fibers to not be 90º to each other in the
total book.
Shabtay
Eltek - Israel
Brian wrote:
MoonMan
Please allow me to add
10) Quality of glass cloth: much of the cloth we are seeing today
has
been woven unevenly, often with the warp and weft locally not even
at
90° to each other. This is rolled up under stress and goes straight
into
the treater. Result: when the prepreg is pressed and the resin
melts,
some of the resultant strain is relieved, but is partially
dissipated in
the adjacent layers, which also become stressed (if they aren't
already). Just waiting for a passage above Tg for stress relief!
Brian
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