ʻO ke kaʻina hana hoʻoheheʻe injection, kahi ʻano hana plastic maʻamau, ʻo ia ke ala mua e hana ai i ka thermoplastic a me ka thermosetting plastics, e hana ana i kahi ākea o nā ʻāpana plastic. Me kona pono a me ka pololei, ua hoʻololi i ke kahua o ka hana plastic.