The raw material of Biodegradable filament ( BioFil ) is polylactic acid, made from lactic acid lactic acid, which can be produced by crops or agricultural by-products such as wheat, rice and sugar beet. BioFil materials can be degraded to non-toxic and harmless CO2 and H2O by microorganisms, light, etc. The production and use of this material are incorporated into the circulation of nature and will not cause pollution to the environment. As a new biodegradable material, BioFil has been widely used in the brush and cleaning industry. And many manufacturers of plastic brush handle and package have achieved degradation.