I need more information.  If you are trying to bond a flexible
polyurethane film to glass, plasma bonding is easy.  I have used plasma
times as low as 10 seconds and got terrific unpeelable bonds.  the
secret is the uniformity of the plasma, and both surfaces need plasma
treatment together.  The polyurethane needs the short time, with longer
times it gets too hot. The glass can withstand much longer time and if I
was trying to bond glass to glass I would use times like 5 minutes.
Bill Moffat