| abstract |
The invention relates to a rigid single-layer or multilayer unoriented or mono- or biaxially oriented film, in which at least one layer contains a cycloolefin copolymer, characterized in that the cycloolefin copolymer has an intrinsic modulus of elasticity Ei, which has the following dependence on the glass transition temperature Tg: Ei = (0.0025 GPa / ° C] x Tg [° C]) + B [GPa] with B = 2.93 to 3.19. |