BIODEGRADABLE PLASTIC COMPOSITION

摘要

PURPOSE: A biodegradable plastic composition is provided to improve resistance to hydrolysis; mechanical strength such as tensile strength, flexural strength, and impact strength; and the property of white turbidity while proper elastic recovery properties are maintained. CONSTITUTION: A biodegradable plastic composition comprises 100.0 parts by weight of polylactic acid, 0.5 to 1.0 part by weight of a crosslinking agent, 5 to 15 parts by weight of polyethylene glycol, 5 to 10 parts by weight of a plasticizer, and 1.5 to 3.0 parts by weight of dry silica. Or the biodegradable plastic composition comprises 10 to 30 wt% of a biodegradable plastic composition composed of 100.0 parts by weight of polylactic acid, 0.1 to 1.0 part by weight of a crosslinking agent, and 3 to 15 parts by weight of polyethylene glycol; and 70 to 90 wt% of polyamide resin. The dry silica has a Brunauer-Emmett-Teller (BET) specific surface area of 175 to 350 m^2/g, an average particle size of 7 to 12 nm, and a pH of 3.7 to 4.7.