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