Biodegradable melt-blown non-woven fabric sliced sheet and preparation method thereof

The invention discloses a biodegradable melt-blown non-woven fabric sliced sheet and a preparation method thereof. The biodegradable melt-blown non-woven fabric sliced sheet comprises the following components in part by mass: 50-90 parts of polypropylene carbonate, 10-50 parts of polypropylene melt-blown non-woven fabric sliced sheets, 0-40 parts of nano-particles, 0-10 parts of bulking agent, 0-8 parts of end-capping reagent, 0-0.1 part of initiating agent, 0-2 parts of heat-resisting stabilizing agent, 0-2 parts of slipping agent, 0-2 parts of biodegradation accelerant and 0-1 part of photolysis agent; and the preparation method comprises the following steps: drying the components for 6-12 h at the temperature of 45-55 DEG C; performing melt blending in proportion in mixing equipment, wherein the blending temperature is 100-210 DEG C, the blending time is 3-8 min, and the rotating speed is 15-50 r/min; and then performing extrusion and granulation on the blend through a single-screw or double-screw extruder, wherein the temperature of the extruder is 100-210 DEG C, and the rotating speed is 15-50 r/min. According to the biodegradable melt-blown non-woven fabric sliced sheet provided by the invention, the tensile strength can reach 25.86 MPa to the maximum, the melt flow rate is 800-3000 g/10min, the glass-transition temperature Tg can reach 28.37 DEG C to the maximum, and the thermal decomposition temperature T(-5%) can reach 260 DEG C to the maximum.