| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: To solve the drawbacks of the conventional adhesive activation method of the heat-sensitive adhesive sheet, and to exert no influence on the printing / printed portion by the printing ink or toner, the heat-sensitive adhesive sheet and the adherend. , Provided is a non-impact heating type adhesive activation method which makes it possible to easily and selectively activate the heat-sensitive adhesive film on an arbitrary portion. SOLUTION: To prepare a novel laser light heat-sensitive adhesive comprising a conventional heat-sensitive adhesive composition containing a laser light absorber which selectively absorbs a laser light having a predetermined wavelength in the near infrared region. By irradiating the coating film of the adhesive with the laser light having the predetermined wavelength, the adhesive film is heated and melted to activate the adhesive. |