The invention discloses a pressure-sensitive
adhesive for a reflection type high-durability polaroid. The pressure-sensitive
adhesive comprises, by weight, 80-85% of
acrylate polymer with the weight-average molecular weight being 70000-800000, 14.8-19% of hydroxyethyl
acrylate polymer with the weight-average molecular weight being 30000-200000, and 0.2-1.0% of bridging agents. According to the pressure-sensitive
adhesive, compared with a formula of traditional pressure-sensitive adhesive, the content of carboxy groups in the adhesive is reduced, the original adhesive force between the adhesive, the polaroid and an aluminum reflecting film and high durability are maintained, and
corrosion of H+ ions in the adhesive to the aluminum reflecting film is reduced. The invention further discloses the polaroid provided with the pressure-sensitive adhesive. The aluminum reflecting film is bonded to a polaroid layer through the pressure-sensitive adhesive. As for the pressure-sensitive adhesive, the adhesive force of the adhesive is larger than 500gf / 25 cm, the
viscosity ranges from 2000cps to 8000 cps, the
weather resistance is improved from 80 DEG C*500hr, 60 DEG C*90%*500hr to 105 DEG C*500hr, 85 DEG C*85%*500hr, pin-hole
corrosion to the reflecting layer aluminum film is avoided, the reflecting performance of the polaroid remains the same, and the using effect can be achieved.