| abstract |
(57) [Summary] [Objective] A cellulose acetate fiber having a desired biodegradation rate, which is suitable as a biodegradable material, a method for producing the same, and a seedling cultivation container and a slope greening sheet having an appropriate biodegradability. To provide. [Structure] Acetification degree is 5-57%, biodegradation index is 5-90 A biodegradable controlled cellulose acetate fiber, a seedling cultivation container and a greening sheet containing the fiber as a constituent component. The fibers are obtained by deacetylating fibers made of cellulose diacetate, cellulose triacetate or cellulose acetate having an intermediate degree of acetylation with an aqueous solution of sodium hydroxide, potassium hydroxide, sodium carbonate or a mixture thereof. . |