ʻOi aku ka maikaʻi o ka hoʻohana ʻana i ka plastic No. 5 a i ʻole No. 7 plastic no nā kīʻaha wai plastik?

I kēia lā ua ʻike au i kahi leka mai kahi hoaaloha.Nīnau ka kikokikona kumu: He ʻoi aku ka maikaʻi o ka hoʻohana ʻana i ka plastic No. 5 a i ʻole No. 7 plastic no nā kīʻaha wai?E pili ana i kēia pukana, ua wehewehe kikoʻī au i ke ʻano o nā helu a me nā hōʻailona ma lalo o ke kīʻaha wai plastik ma kekahi mau ʻatikala ma mua.I kēia lā e haʻi aku wau iā ʻoe e pili ana i nā helu 5 a me 7. ʻAʻole mākou e hele i nā kikoʻī e pili ana i nā helu ʻē aʻe.I ka manawa like, ʻo nā hoaaloha hiki ke nīnau i nā nīnau e pili ana i ka 5 a me 7 he ʻoihana nui nō hoʻi.

ʻO ka helu 5 ma lalo o ke kīʻaha wai plastik ʻo ia ka mea i hana ʻia ke kino o ke kīʻaha wai me ka mea PP.Hoʻohana nui ʻia ka mea PP i ka hana ʻana i nā kīʻaha wai plastik.Ma muli o ka pale wela kiʻekiʻe o ka mea PP, nui nā huahana semi-finished i hiki ke hoʻomehana ʻia i ka umu microwave i nā lā mua Ua hana ʻia ka pahu pahu pahu aniani me ka mea PP.Loaʻa ka hana paʻa o ka mea PP a ʻike ʻia ka papa meaʻai e nā ʻāina like ʻole a me nā wahi a puni ka honua.No laila, i ka hana ʻana i nā kīʻaha wai, ʻaʻole hoʻohana wale ʻia nā mea PP no ke kino kīʻaha.Inā hoʻolohe nā hoaaloha, ʻike lākou inā he kīʻaha wai plastik, kīʻaha wai aniani, a i ʻole nā ​​kīʻaha wai kila.ʻO 90% o nā poʻi kīʻaha kīʻaha i hana ʻia me ka mea PP.He palupalu nā mea PP a maikaʻi ke kūʻē ʻokoʻa wela.ʻOiai inā e lawe ʻia mai loko mai o 20 ℃ emi a hoʻohui koke ʻia i ka wai wela 96 ℃, ʻaʻole e pohā ka mea.Eia nō naʻe, inā he mea AS, e pohā nui a pahū pololei.hāmama.Ma muli o ka palupalu o ka mea PP, ʻo nā kīʻaha wai i hana ʻia me ka PP, inā ʻo ke kino kīʻaha a i ʻole ke poʻi, hiki ke ʻoki i ka wā e hoʻohana ai.

He paʻakikī ka helu 7 ma lalo o ke kīʻaha wai plastik, no ka mea, ma waho aʻe o ka mea, ʻo ka helu 7 kekahi manaʻo ʻē aʻe, e hōʻike ana i nā mea plastik ʻē aʻe i palekana i ka meaʻai.I kēia manawa, ʻo nā kīʻaha wai plastik i hōʻailona ʻia me ka helu 7 ma ka mākeke e hōʻike pinepine nei i kēia mau mea ʻelua, ʻo PC kekahi a ʻo Tritan kekahi.No laila inā e hoʻohālikelike ʻia nā mea ʻelua me PP, ʻo ia ka mea helu 5, hiki ke ʻōlelo ʻia he nui loa ka āpau.

Hoʻohana hou ʻia ka PC papa meaʻai i loko o nā kīʻaha wai plastik a me nā mea pono hale plastik, akā aia nā mea PC i ka bisphenol A, e hoʻokuʻu ʻia ke ʻoi aku ka mahana o ka pilina ma mua o 75°C.No laila no ke aha e hoʻohana mau ʻia ai ia i mea kīʻaha wai?ʻO nā mea hana e hoʻohana maʻamau i nā mea PC no ka hana ʻana i nā kīʻaha wai plastik e loaʻa nā ʻōlelo maopopo i ke kūʻai ʻana, e hōʻike ana e hiki i ia mau kīʻaha wai ke paʻa wale i ka wai wela a me ka wai anuanu, a ʻaʻole hiki ke hoʻohui i ka wai wela me ka mahana o ka wai ma mua o 75°C.I ka manawa like, ma muli o ke kiʻekiʻe kiʻekiʻe o nā mea PC, ʻo ke kīʻaha wai i hana ʻia he ʻano maʻalahi a nani hoʻi.