| abstract |
Challenge: A laminate comprising a thick, highly transparent cured adhesive sheet exhibiting flow characteristics accompanied by satisfactory flowability before irradiation and satisfactory initial adhesion to an adherend, and satisfactory hardness (especially, high storage modulus) after irradiation. To provide a method of manufacturing. Solution: polymer/monomer mixture comprising partially polymerized (meth)acrylic monomers, monomers with radiation reactive sites activated by short-wavelength radiation below the first wavelength, and polymer/monomers through radiation of wavelengths greater than the first wavelength Forming a radiation-curable adhesive sheet precursor into a sheet comprising a monomer mixture and a photoinitiator for initiating polymerization of the radiation-reactive site-retaining monomer; Forming a radiation-curable adhesive sheet by irradiating the precursor with radiation having a wavelength greater than a specific wavelength to polymerize the radiation-curable adhesive sheet precursor; Disposing a sheet of radiation-curable adhesive adjacent to at least one surface of the first substrate; Placing the second substrate adjacent to the sheet of radiation-curable adhesive; Applying heat and/or pressure to the sheet of radiation-curable adhesive; And irradiating the radiation-curable adhesive sheet with radiation including short-wavelength radiation of a first wavelength or less to obtain a cured adhesive sheet, a first substrate, a second substrate, and a cured adhesive disposed therebetween. A method for producing a laminate comprising a sheet. |