The invention discloses an
adhesive sheet and a preparation method thereof. The
adhesive sheet comprises an ABA-structural
adhesive resin layer, a light-release-type
polyester film layer and a heavy-release-type
polyester film layer, wherein the light-release-type
polyester film layer is arranged on the ABA-structural adhesive resin layer and the heavy-release-type polyester film layer is arranged under the BA-structural adhesive resin layer. The adhesive sheet is characterized in that the ABA-structural adhesive resin layer comprises adhesive
layers A as upper and lower
layers and a support layer B as an intermediate layer, each of the adhesive
layers A comprises a
solvent-based polyacrylate
copolymer adhesive resin, a
monomer containing
unsaturated bonds and a UV initiator and the support layer B comprises the
solvent-based polyacrylate
copolymer adhesive resin and a crosslinking curing agent. The adhesive layers and the support layer are completely made of
solvent-based thermosetting materials, after the adhesive sheet and a laminate are adhered, degassed by virtue of an
autoclave and the rear section is fixed and cured by UV
radiation so that the problem that bubbles remain in a border caused by the cold contraction of a
colloid can be completely avoided; the
yield rate of the product is high, the preparation process is simple and the
coating process can be specifically selected according to a device.