| abstract |
The present invention relates to a kind of strippable pressure sensitive adhesive sheet material of thermal expansion of electronic component manufacturing technology field and coating machines, including adhesive layer and foaming layer, the parts by weight of adhesive layer are coated on PET film ground：Polyurethane resin 50-100, polyisocyanate crosslinker 1-30, ethyl acetate 10-50,60-120 DEG C of drying temperature, 10-30 μm of gluing layer thickness after drying；The parts by weight of foaming layer：Polybutyl methacrylate or polymethyl methacrylate 50-100, organic superfine powder 100-500, dioctyl phthalate 10-20, ethyl acetate 100-500, expandable microspheres 10-50, is coated on adhesive layer, 40-80 DEG C of drying temperature, 20-30 μm of depth of foam after drying；Adhesive layer and foaming layer are changed to dryness glue by adhesive sticker, solve the attachment of chip adhesive sticker, cut inclined and problem on deformation, the application coating machine, coating even uniform, uniform drying, and thickness is consistent. |