| 摘要 |
Disclosed is a biaxially oriented multilayer film comprising at least two layers A-B, wherein A and B represent separate layers at least one of which layers comprises a polyimide having a Tg of greater than about 200° C., wherein the film has a CTE of less than 35 ppm/° C., and wherein A comprises 60 wt. %-100 wt. % of amorphous polymer with 0 wt. %-40 wt. % of crystallizable polymer, and B comprises 60 wt. %-100 wt. % crystallizable polymer with 0 wt. %-40 wt. % amorphous polymer, the relative thicknesses of layer A to layer B are in a ratio in a range of between 1:5 and 1:100, and the thickness of the film is in a range of between 5 mum and 125 mum. Also disclosed is a biaxially oriented monolithic film comprising a polyimide with structural units formally derived from 3,4-diaminodiphenylether and 4,4-oxydiphthalic anhydride. Laminates comprising the films and methods for making film and laminate are also disclosed. Articles comprising a film or laminate of the invention are also disclosed.
|
