Method of preparing elastic pressure-sensitive adhesive tape and elastic pressure-sensitive adhesive tape

A method of preparing an elastic pressure-sensitive adhesive tape, comprising the steps of:

• Step (1):
• coating an adhesive on a first substrate, and curing for 10 to 30 seconds in a UV curing and drying channel to preliminarily cure the adhesive;
• wherein components of the adhesive include:
• 1 to 20 parts by mass of quasi-microcapsule powder;
• 100 to 200 parts by mass of polyacrylate resin with a carbon-carbon double bond, 20 to 50 parts by mass of diluent monomer with a carbon-carbon double bond, 1 to 10 parts by mass of photoinitiator, 1 to 3 parts by mass of inhibitor, 30 to 50 parts by mass of liquid-state tackifier resin, 0 to 70 parts by mass of color paste;
• wherein a shell of the quasi-microcapsule powder includes a water soluble polymer, and a core material of the quasi-microcapsule powder includes a low boiling point alkane;
• wherein the low boiling point alkane is one or more of n-pentane, isopentane, and neopentane;
• Step (2):
• after the preliminary cure is completed, heating for 2 to 5 minutes in the UV curing and drying channel using a temperature gradient that increases from 70° C. to 100° C. to cause the low boiling point alkane to rapidly evaporate, swell, and burst the shell, thereby forming a plurality of encapsulated bubbles inside the polyacrylate resin;
• Step (3):
• after forming the encapsulated bubbles, further curing for 20 to 40 seconds in the UV curing and drying channel to completely cure the adhesive and thus form an elastic pressure-sensitive adhesive layer on the first substrate, thereby obtaining the elastic pressure-sensitive adhesive tape.