Polyolefin surface material UV adhesive tape and preparation method thereof

Abstract

The invention discloses a polyolefin surface material UV adhesive tape and a preparation method thereof. The adhesive tape comprises a surface material, a UV adhesive layer and a PET release protective film which are stacked one above another, the surface material is a PO film, and comprises, by mass, 10-40 parts of polypropylene (C3); 30-70 parts of an ethylene-propylene copolymer (C5(70)); and 10-40 parts of an ethylene-propylene copolymer (C5(80)); the UV adhesive layer comprises, by mass, 50 to 100 parts of acrylic resin; 0 to 5 parts of an epoxy resin crosslinking agent; 1 to 50 parts ofcarbon-carbon double bond polyunsaturated resin and 0.5 to 10 parts of a light initiator mixture. The more environmentally friendly PO film is used the surface material of the UV adhesive tape, and atthe same time improves the disadvantage that the rubber layer is too soft or too hard, by condensation polymerization of the epoxy resin crosslinking agent and the acrylic resin, the adhesion and thecohesive force between the adhesive layer and the PO film are greatly enhanced to avoid the case that the adhesive residue on the back side of a wafer is separated from an iron ring to be detached, and the viscosity reduction effect of the tape can be greatly improved, so that the picking rate is 100%.

Description

technical field [0001] The invention belongs to the technical field of films, and in particular relates to a polyolefin surface material UV adhesive tape and a preparation method thereof. Background technique [0002] UV tape is an indispensable material in the processing of wafers (wafers, silicon wafers used in the production of silicon semiconductor integrated circuits). It is used to fix the wafers on the cutting machine for cutting. (UV light hereinafter referred to as ultraviolet light) irradiation, at this time the adhesive tape is rapidly reduced from extremely high to almost zero, so as to facilitate the next process selection. At present, the UV tape used in China usually comes from Japan. Its structure includes PVC film (polyvinyl chloride film) surface material, UV adhesive layer and release protective film (PET film). Pasted on the back of the wafer, when the processing is completed, the UV adhesive layer is irradiated from the direction of PVC, and the adhesio...

AI Technical Summary

Problems solved by technology

[0009] In view of the technical problems of insufficient adhesion of the UV adhesive layer to the PO film and uneven expansion of the PO film in the prior art, the purpose of the present invention is to provide a polyolefin surface material UV tape

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