The quick-drying print and environmental-friendly biaxially orientated polypropylene synthetic paper

摘要

A quick-drying print and environmental-friendly biaxially orientated polypropylene synthetic paper is produced from a polypropylene resin composition comprising a high crystalline polypropylene resin, calcium carbonate composite particles, titanium dioxide composite particles, antistatic agents, UV absorbers and anti-blocking agent, which are fed into one twin-screw primary extruder and two twin-screw secondary extruders respectively, convergently flowed through the same T-die, co-extruded into a three-layer structure substrate film, after cooling and setting, this film is first longitudinally orientated, then laterally orientated; thereafter the three-layer film is high-frequency corona treated and winded up to gain the film having thickness less than 250 µm. At the end the three-layer film is coated a thickness below 10 µm with a water-based paper-like surface processing agent containing acrylic resin, calcium carbonate, clay, titanium dioxide, water, antistatic agent via a gravure coating roller to acquire an improved synthetic paper having a better printability.