COMPOSITION FOR MULCHING FILM AND BIODEGRADABLE MULCHING FILM WITH MULTIFUNCTION

摘要

PURPOSE: A composition for a mulching film is provided to use as master batch when manufacturing a biodegradation property mulching film capable of functioning as a sustained fertilizer. CONSTITUTION: A composition for a mulching film comprises a starch, a biodecomposable resin, a plasticizer, a fertilizer. The content of starch is 20-40 weight% based on the composition total weight. The content of fertilizer is 0.5-15 weight% based on the composition total weight. The biodecomposable resin is included to 100-250 parts by weight base on the 100 parts by weight of starch. The plasticizer is included to 5-25 parts by weight base on the 100 parts by weight of starch. The starch comprises by selecting more than one kind of a corn starch, a glutinous corn starch, a potato starch, a sweet potato starch, a wheat starch, a tapioca starch, a rice starch or a denatured starch thereof. The biodecomposable resin comprises a combination of butylene adipate-co-terephtalate and polylactic acid. The composition additionally includes 0.5-10 parts by weight of lubricant base on the 100 parts by weight of starch.