Solvent-free adhesive, laminate, and package

Provided are: A solvent-free adhesive that has excellent adhesive strength and heat seal strength (heat resistance) at the interface of a metal vapor deposition layer and is excellent in coating properties; and a solvent-free adhesive that has excellent adhesive strength, Provided are a laminate and a package that are excellent in appearance. The above object is solved by a solvent-free adhesive containing a polyol compound and a polyisocyanate compound containing a polyisocyanate (B1) that satisfies the following: (1) the polyisocyanate (B1) is a reaction product of a polyether polyol and an isocyanate compound. (2) the polyether polyol contains 95 mol per molecule or more of a hydroxy group derived from a bifunctional polyether polyol. (3) the isocyanate compound contains 90 mol per molecule or more of an isocyanate group derived from an aromatic diisocyanate compound. (4) the ICI viscosity of the polyisocyanate (B1) in 90 dege Scientific is 600 [MPa...