I ko kākou ola, he mea nui nā kīʻaha pepa hoʻolei. Inā paha no ka hoʻokipa ʻana i nā ʻohana, nā hoaaloha a me nā mea kūʻai aku, a i ʻole ma ke ʻano he hoʻolaha, pono e hoʻohana ʻia kēia kīʻaha pepa. I kēia manawa, ʻo nā kīʻaha pepa hoʻolei ma ka mākeke he mau kīʻaha pepa i uhi ʻia me ka PE a me nā kīʻaha pepa i uhi ʻia me ka PLA. ʻO wai o kēia mau mea ʻelua i ʻoi aku ka maikaʻi a ʻoi aku ka launa pū me ke kaiapuni?
Hoʻohana pinepine nā kīʻaha pepa kuʻuna i kahi papa o ka uhi PE ma luna o ka ʻili o ka pepa kumu e loaʻa ai ka hana maikaʻi ʻole i ka wai a me ka hana ʻaila. ʻAʻole hiki ke palaho, ʻaʻole hiki ke hoʻopili hou ʻia, a paʻakikī ke hana hou. He paʻakikī ke hana hou i nā kīʻaha pepa PE kuʻuna no ka mea he paʻakikī ke hoʻokaʻawale i ka ʻili polyethylene ma luna o ka ʻili o ke kīʻaha pepa mai ke kīʻaha pepa.
He ʻano mea palaho hou ka mea PLA. He mea ia i unuhi ʻia mai ka palaoa kulina. Ma hope o ka hoʻohana ʻia ʻana, hiki ke palaho ʻia e nā microorganism ma ke ʻano ma lalo o nā kūlana kikoʻī, a hiki i ka palaho ke hana i ke kalapona ʻokikene a me ka wai.
Hoʻolaha pinepine ʻia nā kīʻaha i uhi ʻia me ka PLA ma ke ʻano he koho "aloha i ke kaiapuni" i nā kīʻaha pepa i uhi ʻia me ka PE, ʻo ka ʻoiaʻiʻo, he plastik ka PLA a ua loaʻa i nā pilikia like me nā kīʻaha pepa i uhi ʻia me ka PE. Pono ka biodegradability o PLA e hoʻokō i ʻelua mau kūlana: 50%-60% haʻahaʻa a me ka mahana 50-70 degere Celsius. Ma lalo o kēia mau kūlana, hiki i nā microorganism ke hoʻohaumia mālie i ka PLA ma hope o kekahi mau mahina a ʻoi aku paha. Eia nō naʻe, he paʻakikī i ke kaiapuni kūlohelohe ke hiki i ka mahana e pono ai no ka hoʻohaumia ʻana. Inā hoʻolei ʻia nā huahana PLA ma ka makemake, ʻaʻole hiki ke hoʻohaumia maoli ʻia. No ka hoʻohaumia ʻana i ka PLA, pono e hana ʻia ma ke ʻano ʻoihana ma nā hale hana composting kūikawā. ʻO ka ʻoiaʻiʻo, he kakaikahi nā ʻāina i loaʻa kēia mau hale hana ʻoihana.
Eia kekahi, ua hōʻike nā haʻawina ua aneane like ʻole ka nui o ka hōʻino ʻana o ka PLA mai nā plastik maʻamau i ka wai hou a me ke kai. Ua ʻōlelo pū ka European Plastics Association ʻaʻole hiki ke manaʻo ʻia he ʻoi aku ka maikaʻi o nā plastik biodegradable ma mua o nā plastik kuʻuna ʻaʻole hiki ke hōʻino ʻia. Inā ʻaʻole i hoʻokō ʻia nā kūlana hōʻino, ʻaʻohe ʻokoʻa ma waena o nā "plastics degradable" a me nā plastics maʻamau.
ʻOiai hiki ke palaho ʻia nā kīʻaha pepa i uhi ʻia i ka PLA, ʻo ke kumukūʻai o nā mea PLA he 2-3 mau manawa kiʻekiʻe aʻe ma mua o ka PE, a ʻo ke kumukūʻai o nā mea maka kiʻekiʻe e alakaʻi i nā kumukūʻai kiʻekiʻe. No laila, ʻo nā kīʻaha pepa hoʻolei nui ma ka mākeke he mau kīʻaha pepa i uhi ʻia i ka PE.
Ka manawa hoʻouna: Dec-27-2022
