Injection molding is a method to produce part and intricate the serial production of net—shape, functionalised parts and structured surfaces in a large batches. Nowadays, there are millions of tons of plastic bags in around the world that's damage to environment and the researchers believe that waste can be used to develop new beneficial product. Thus, this research extensively investigate the potential used Hydroxyapatite (HA), waste plastic bag Low-Density Polyethylene (LDPE) as primary binder and suitable secondary binder, Palm Stearin in injection molding. A simplified hydrothermal method of synthesizing Hydroxyapatite powder is described. Basically, there are four stages that involved which is mixing, molding, debinding and lastly is sintering. Nowadays, due to an exploration of application “Green Technology”, this research will be become most of strongly finding for future research in biomedical application. The volume ratio of HA, waste plastic bag LDPE, Palm Stearin combination in feedstock was investigated. Feedstock with two composition 30% and 40% powder loading was injected by injection molding machine with several injection parameter. These finding supports the development of “Green Technology” by using waste plastic bag (LDPE) and Palm Stearin as binder system in injection molding.