Patent ID: 8377508

Claim:
A process for producing a composite film, comprising: preparing a coating apparatus provided with a pair of rolls opposed to each other, each of the rolls rotating in an opposite direction in the opposed portion, and coating onto a film passing through between the rolls a solventless laminating adhesive comprising a polyisocyanate component (A) and a polyol component (B), the polyisocyanate component (A) containing a urethane prepolymer (A1) having an isocyanate group at its molecular terminal and obtained by urethane reaction of a polyisocyanate monomer (a) and a polyol component (b), and the polyol component (B) and the polyol component (b) as a material of the urethane prepolymer (A1) exhibiting no crystallinity at room temperature; and having an initial viscosity of 500 to 1000 mPa·s three minutes after the polyisocyanate component (A) and the polyol component (B) are mixed, and a viscosity increase of 100% to 350% relative to the initial viscosity 20 minutes after the mixing.