Urethane Resin Adhesive Composition

A urethane resin adhesive composition comprising:

• a urethane resin comprising at least two types of multi-functional polyols and at least one type of multi-functional isocyanate;
• and a thermo-sensitive catalyst functioning catalytically at a temperature greater than or equal to a predetermined temperature in a range greater than or equal to 20° C. and less than or equal to 90° C.;
• the multi-functional polyols comprising:
• a first multi-functional polyol having a number average molecular weight greater than or equal to 50 and less than or equal to 800;
• and a second multi-functional polyol having a number average molecular weight greater than or equal to 1,000 and less than or equal to 4,000;
• wherein
• average OH values of the first multi-functional polyol and the second multi-functional polyol are greater than or equal to 150 and less than or equal to 800;
• and
• a NCO/OH ratio of the multi-functional isocyanate is greater than or equal to 0.8 and less than or equal to 1.2.