Puhi ʻilika

• ʻO ka hollow blow molding, kahi hana wikiwiki o ka hana plastik. I ka wā o ke Kaua Honua ʻElua, ua hoʻomaka ka hoʻohana ʻana i ka hoʻoheheʻe ʻana e hana i ka pahu polyethylene haʻahaʻa haʻahaʻa. I ka hopena o nā makahiki 50, me ka hānau ʻana o ka polyethylene kiʻekiʻe kiʻekiʻe a me ka hoʻomohala ʻana o ka mīkini hoʻoheheʻe ʻana, ua hoʻohana nui ʻia ka ʻenehana puhi puhi. .
• ʻO nā plastics no ka puhi ʻana he polyethylene, polyvinyl chloride, polypropylene, polyester a pēlā aku. Hoʻohana nui ʻia nā pahu hollow e like me nā pahu pahu ʻoihana. Hiki ke hoʻokaʻawale ʻia ka puʻu i loko o ka extrusion blow molding a me ka injection blow molding, a ua hoʻomohala hou ʻia ka multi layer blow molding a me ka tensile blow molding.