Antistatic composite board and method for producing the same

A method for producing an antistatic composite board, comprising:

• a mixing process implemented by adding a polyurethane oligomer and an antistatic agent into a solvent and stirring at a stirring speed of between 600 rpm and 1,000 rpm for 5 minutes to 15 minutes to form a coating liquid, wherein the coating liquid has a viscosity of between 20 cps and 40 cps, and wherein the antistatic agent includes a first dispersant and a plurality of carbon nanotubes dispersed in the first dispersant, and a weight ratio between the carbon nanotubes and the first dispersant is between 99:1 and 99.9:0.1;
• a coating process implemented by coating the coating liquid onto a PET film to form a coating layer on one side of the PET film;
• and
• a thermal pasting process implemented by pasting the PET film having the coating layer formed thereon onto a PET substrate at a temperature of between 40° C. and 70° C., so as to form an antistatic composite board,
• wherein the solvent is propylene glycol methyl ether acetate (PMA), and wherein, based on a total weight of the coating liquid being 100 wt %, a content of the polyurethane oligomer is between 30 wt % and 40 wt %, a content of the antistatic agent is between 5 wt % and 20 wt %, and a content of the solvent is between 40 wt % and 60 wt %,
• wherein the antistatic composite board has a light transmittance of greater than or equal to 84%, a haze of less than or equal to 4%, and a surface specific impedance of less than or equal to 1072.