A kind of back-coated pressure-sensitive adhesive for PE film and preparation method thereof

Abstract

The invention discloses a pressure sensitive adhesive for back coating a PE (Polyethylene) film and a preparation method of the pressure sensitive adhesive. The adhesive contains the following substances in percentage by weight: 18-20% of white mineral oil, 0.5-1% of antioxidant, 25-28% of styrene-isoprene-styrene copolymer (SIS), 3-4% of styrene-isoprene-styrene triblock copolymer (SEPS), 20-25% of C5 / C9 copolymerized petroleum resin and 25-30% of glycerol ester of rosin. The preparation method of the pressure sensitive adhesive for back coating the PE film comprises the steps: sequentially adding the SIS and the SEPS, heating, stirring and fusing, then, adding the C5 / C9 copolymerized petroleum resin and the glycerol ester of rosin, and stirring to be uniform. After the pressure sensitive adhesive for back coating the PE film is used for back coating the PE film, the phenomenon that the PE film is crinkly cannot be caused when the film is unrolled, and the pressure sensitive adhesive is good in low temperature resistant effect and moderate in cohesive strength, initial adhesion and release force.

Description

technical field [0001] The invention relates to a hot-melt pressure-sensitive adhesive, in particular to a pressure-sensitive adhesive used for PE film back coating and a preparation method thereof. Background technique [0002] Pressure sensitive adhesive is the abbreviation of pressure sensitive adhesive. It is a class of adhesives that are sensitive to pressure. It is mainly used in the preparation of pressure-sensitive adhesive tapes. The peeling force of general pressure-sensitive adhesive (the peeling force shown after the adhesive tape and the adhered surface are pressed and pasted) < the cohesive force of the adhesive (the force between the molecules of the pressure-sensitive adhesive) < the sticking force of the adhesive (the adhesive and the base Adhesion between materials). Such pressure-sensitive adhesives will not have degumming and other phenomena during use. [0003] When the existing pressure-sensitive adhesives are used for the back coating of PE f...

AI Technical Summary

Problems solved by technology

[0003] When the existing pressure-sensitive adhesives are used for the back coating of PE films, most of them will wrinkle the PE film, and a few adhesives that do not wrinkle also have the disadvantage of too low cohesive strength.

[0004] With the application of PE film back-coated pressure-sensitive adhesive more and more widely, the market provides a broader market for the manufacture of wrinkle-resistant PE film or modified PE film, and the manufacture of non-wrinkle hot-melt adhesive pressure-sensitive adhesive. However, domestic technology in this area is still at an immature stage.