The invention relates to a low-friction-coefficient antiblocking smooth
coating and a preparation method thereof. The low-friction-coefficient antiblocking smooth
coating contains the following components in parts by weight: 90-110 parts of
styrene-acrylic
emulsion, 15-25 parts of
ion exchange silica
sol, 10-15 parts of large-particle-size silica
sol, 15-25 parts of water, 30-50 parts of
ethanol, 2-4 parts of n-butyl
alcohol and 0.4-0.6 part of
sodium polystyrene sulfonate. The preparation method comprises the following steps: a, by taking
styrene-acrylic
emulsion with the pH value of 8-9 as a base material, slowly
doping silica
sol, stirring for 1 hour at a rotating speed of 500rpm, and uniformly mixing materials; b, then adding
mixed solution of water and
ethanol, slowly adding a n-butyl
alcohol defoaming agent, and stirring for 20 minutes at a
low speed; and c, finally adding water diluted solution of
sodium polystyrene sulfonate, stirring for 10 minutes at a
low speed, then filtering by virtue of a 300-mesh filter net, standing, and defoaming for later use. Therefore, the
coating has multiple advantages of antistatic property, antiblocking property, good
weather resistance, high printing color density, low flexibility and improved paper feeding passing rate of a printing medium, the coating is easy to process and manufacture, and
batch production can be carried out.