Hot-melt pressure-sensitive adhesive for alkaline dry cell label and preparing method thereof

The invention discloses a hot-melt pressure-sensitive adhesive for an alkaline dry cell label and a preparing method thereof. The method comprises the steps of 1, adding rigid dicarboxylic acid, trimellitic anhydride, aliphatic dibasic acid, aliphatic diol, amorphous modified dihydric alcohol, esterification catalyst, stabilizer and high-temperature-resisting antioxidant into a pulping vessel to be evenly mixed; 2, pressing well mixed materials into an esterification vessel for esterification reaction; 3, pressing an esterification product into a polycondensation vessel, and adding polyether polyol and polycondensation catalyst into the polycondensation vessel for pressure reduction polycondensation reaction; 4, pressing a polycondensation product into a mixing vessel, adding tackifying resin, softener and antiager into the mixing vessel for sufficient melt blending, and finally conducting discharging and cooling to obtain the polyester hot-melt pressure-sensitive adhesive. The hot-melt pressure-sensitive adh