▎ 摘　　要

NOVELTY - A biodegradable reinforced heat-resistant polylactic acid resin comprises 40-90 pts. wt. polylactic acid, 5-50 pts. wt. modified degradable plant fiber, and 1-20 pts. wt. additive composed of antioxidant, vinyltrimethoxysilane, methyl tin stabilizer and lubricant in a mass ratio of (0.2-3):1.2:0.8:0.5-5. The modified degradable plant fiber is modified ramie fiber, modified Abutilon indicum fiber, modified Apocynum venetum fiber, modified coconut husk fiber, or modified coconut fiber. USE - Biodegradable reinforced heat-resistant polylactic acid resin. ADVANTAGE - The biodegradable reinforced heat-resistant polylactic acid resin has excellent mechanical property. The modified degradable plant fiber and the nucleating agent have excellent synergistic effect. The modified degradable plant fiber can significantly induce the crystallization of polylactic acid. The fiber and the polylactic acid matrix have excellent interface interaction. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the biodegradable reinforced heat-resistant polylactic acid resin, which involves: (1) mixing polylactic acid, modified biodegradable plant fiber and additive, placing the mixed mixture in a vacuum oven to dry for 1.5-2.5 hours, and mixing in a high-speed mixer at 220-280 rpm for 10-20 minutes to obtain a mixture; (2) extruding the mixture in a twin-screw extruder at 180-200 degrees C and 150-200 rpm, granulating, and drying to obtain a granular material; and (3) injection molding the granular material with an injection molding machine, and heat treating in a vacuum oven at 115-125 degrees C for 2-5 hours.