De-lamination and Expose Solution of Processing Laminated Glass With EVA Film
By Peter
cnc@cncnext.com/ benext77@gmail.com
www.cncnext.com
General View:
I have talked about the Bubbles Solution for Laminated Class with EVA
Film , and today I would like to talk about the other problems you may
face in laminating glass with EVA FILM.
The common problems are: de-lamination and self-exposing of the laminated glass.
De-lamination:
1) The heating temperature is not high enough or the heatig time is
not long enough for the EVA FILM to melt and react totally, so the
cross link reaction is not finished.
For this reason, please increase the heating temperature or prolong
heating time of laminating.
2) The EVA FILM is out of the shelf life, most EVA FILM's self life is
about one year or longer. Please use the EVA FILM within the self
life. Yes, different EVA FILM manufacturers may have different self
life for the EVA Film.
Maybe it's the problem of the quality of the EVA FILM. Send some film
samples back to the EVA FILM manufacturer to test the EVA FILM again.
The moisture of the glass or EVA FILM is too much. EVA FILM are less
sensitive to moisture, but if it's too high, it will do harm to the
adhesion of EVA FILM. Please dry glasses and storage EVA FILM in good
way.
There is some organic substance on the surface of glasses. For example
oily substance will also do harm to the adhesion of EVA FILM.
Please clean the glasses if necessary. You can use clean water,
industrial alcohol, Acetone to clean the glasses.
6) When laminated with the painting papers (like PP, PVC), the
printing ink is too much and not being dried.
Please dry the printing papers first before laminating with glasses
and EVA FILM.
7) If you found the de-lamination is happening in the edges of the
laminated glass, here is why:
Maybe the workers' hand touch the edges of the glasses, and there are
oily substance in the hand, which will do harm to the adhesion of the
EVA FILM.
Please ask your worker to wear gloves.
Maybe its summer, and your worker work very hard, and their hands are
sweaty. And the sweat will do harm to the EVA FILM.
Self-Exposing
1) The laminated glass is cooling too fast. Please do not open the
oven door to help cooling after the temperature of the laminated glass
is lower than 75 degrees.
2) Please avoid the hot laminated glass touching the cold water.
3) Put some wood blocks between the laminated glasses to make the
cooling is well-proportioned.
4) The quality of the glass is not good, which are easy to expose.
5) The EVA FILMs are not eliminated the internal stress. Good quality
EVA Film will be eliminated the internal stress to make the EVA film
less contracting.
If the EVA Film are not eliminated the internal stress, then when
laminating the glass with EVA Film, the EVA Film's internal stress
would try to contract to its original state and expose the laminated
glass.
) The silicon bag is not clean, which means maybe some block inside
the silicon bag. So when the pre- laminated glass on the block and
vacuuming is working, the pressure would break the laminated glass.
All rights reserved by:
China (Ethylene-vinyl acetate)EVA Interlayer Film Manufacturer for
Safety Laminated Glass, Smart Glass, Privacy Glass, LED Glass, PV
Solar Encapsulationetc.
cnc@cncnext.com / www.cncnext.com
eva@evafilms.com / www.evafilms.com
benext77@gmail.com / benext77@hotmail.com
