Composite film and method for producing same

A process for producing a composite film comprising:

• forming a urethane polymer by reacting a polyol with a polyisocyanate in one or more (meth)acrylic monomers to prepare a liquid syrup of the urethane polymer and the (meth)acrylic monomers;
• and
• applying the liquid syrup on a support, followed by irradiating with light to form an acrylic polymer, and
• thereby obtaining a composite film wherein total light transmittance of the film is 93.0% or more in terms of a thickness of 100 pm, breaking strength (23° C.) of the film is 3.0 MPa or more to 75 MPa or less, breaking elongation ratio (23° C.) is 150% or more to 1,000% or less, and 20% modulus (23° C.) is 0.1 MPa or more to 7.5 MPa or less.