PRESSURE-SENSITIVE ADHESIVE CONTAINING NEAR INFRARED ABSORBING COLORING MATTER

摘要

This invention provides a pressure-sensitive adhesive containing a near infrared absorbing coloring matter that has an excellent function of shielding near infrared rays and has excellent durability. The pressure-sensitive adhesive containing a near infrared absorbing coloring matter is characterized in that, in a lightfastness test in which a layer having a thickness of 25 ± 5 µm is formed from the pressure-sensitive adhesive and is exposed to light of an irradiance of 64.5 W/m² at a wavelength of 300 to 400 nm for 160 hr, the absorption intensity of the near infrared absorbing coloring matter at the maximum absorption wavelength after the lightfastness test is not less than 50% relative to the absorption intensity before the test.