An injection molding pellet is applied for injection molding. The base material of the injection molding pellet is a polylactic resin, and the polylactic resin is mixed with wood grains with a grain size that does not exceed 50 m.

A method for producing a clinical waste container having a lower basket part having an upper basket opening and an upper lid part, arranged to be fastened to the lower basket part to cover the upper basket opening. The upper lid part has a first cylindrical part having an upper lid opening arranged to receive clinical waste into the lower basket part. The method includes: providing a metal mold and a heated nozzle; injecting a blended molten plastic material comprising at least 30% by volume wooden fibers via the heated nozzle into the metal mold; allowing the plastic material to harden by cooling to form the upper lid part; removing the upper lid part from the metal mold; providing the lower basket part; and actively and continuously cooling the mold during the hardening to a constant temperature of at least 30 C.

A writing instrument part that improves the releasability of a core pin is provided. In a writing instrument part by the insert molding method in which a wooden barrel material made of natural wood flour and a water-soluble resin binder is injected into a mold, the wooden barrel material and a core pin having a paper straw inserted therein are integrated, and a two-layer structure having a paper straw layer as an inner layer and a wooden barrel layer as an outer layer is formed.

An aminated epoxy cardanol glycidyl ether (NH.sub.2NC514) compatilizer, a preparation method and an application are provided, and the NH.sub.2NC514 is prepared by self-polymerization reaction of NC514 and grafting reaction with hydrolyzed KH550. When NH.sub.2NC514 is mixed with polylactic acid and bamboo fibers as a compatibilizer, a bio-based degradable bamboo-plastic composite material with excellent processing fluidity and mechanical properties can be obtained. The composite material is used for preparing the 3D printed product.