The present invention discloses a method for preparing high-strength, high-toughness, biodegradable melt-blown nonwoven materials, comprising the following steps: S1. Premixing: Using poly(lactic acid) chips and poly(butylene succinate) chips as raw materials, premix under specified conditions to produce poly(lactic acid)/poly(butylene succinate) premixed chips; S2. Melt blending: The prepared PLA/PBDO pre-blended pellets are fed into a twin-screw extruder for melting, then extruded through a metering pump and a hanger-type die into a fine melt stream; S3. Hot Melt Forming: The melt undergoes high-temperature, high-speed airflow stretching and shearing to form fibers. These fibers are then collected by a receiving device after self-bonding into a web, yielding poly-lactic acid melt-blown nonwoven materials with diverse morphological structures. This invention's preparation method requires only a single blending step and achieves enhanced strength and toughness in poly-lactic acid melt-blown nonwoven materials without additional equipment. Furthermore, this invention uses polylactic acid and polybutylene succinate as raw materials, achieving full biodegradability and meeting sustainable development requirements.
Country Code: CN
Application Number: CN202310099130.4
