He aha ka plastic i hana ʻia?He mea make anei?

He aha ka plastic i hana ʻia?

ʻO ka plastik kahi mea synthetic maʻamau, ʻike ʻia hoʻi he plastic.Hana ʻia ia me nā pūhui polymer e ka hopena polymerization, a he plasticity a me ka processability.Hoʻohana nui ʻia nā plastik i nā ʻano like ʻole, e like me ka hoʻopili ʻana, ke kūkulu ʻana, ka automotive, electronics a pēlā aku.

ʻO nā mea nui o nā plastics he polymers, ʻo ka mea maʻamau ka polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) a pēlā aku.He ʻokoʻa nā ʻano a me ka hoʻohana ʻana o nā mea plastik like ʻole.No ka laʻana, he maikaʻi ka paʻakikī o ka polyethylene a me ka pale ʻana i ka corrosion, a hoʻohana pinepine ʻia e hana i nā ʻeke plastik a me nā ipu;He maikaʻi ka PVC i ka wā a me nā waiwai insulation, a hoʻohana pinepine ʻia e hana i nā paipu a me nā uea wili.

He mea make ka plastic?

Pono e loiloi ʻia ka nīnau inā he mea ʻawaʻawa paha ka plastic e like me ka mea plastik kikoʻī.Ma keʻano laulā, palekana ka hapa nui o nā mea plastik a me ka pōʻino ma lalo o nā kūlana maʻamau o ka hoʻohana.Eia nō naʻe, loaʻa i kekahi mau mea palaka nā kemika e pōʻino i ke olakino kanaka, e like me Phthalates a me bisphenol A (BPA).He hopena paha kēia mau mea kemika i ka ʻōnaehana endocrine o ke kino a me ka ʻōnaehana hānau.

I mea e hōʻoiaʻiʻo ai i ka palekana o nā huahana plastik, ua hoʻokumu nā ʻāina a me nā ʻāina i nā lula kūpono a me nā kūlana e kaupalena ai i ka hoʻohana ʻana i nā mea ʻino.No ka laʻana, ua hoʻokumu ka European Union i nā hoʻoponopono REACH ma nā mea plastik, a ua hoʻokumu ka FDA o ʻAmelika Hui Pū ʻIa i nā kūlana ma nā mea pili meaʻai.Pono kēia mau lula a me nā kūlana i nā mea hana plastik e kāohi i ka ʻike o nā mea pōʻino i ke kaʻina hana a hana i nā hoʻokolohua kūpono a me ka hōʻoia.

Eia kekahi, ʻo ka hoʻohana pono ʻana a me ka hoʻokuʻu ʻana i nā huahana plastik kekahi mea nui e hōʻoia i ka palekana.No ka laʻana, e pale i ka hoʻokomo ʻana i ka meaʻai wela a i ʻole nā ​​​​wai e pili pono ana me nā ipu plastik e pale ai i ka neʻe ʻana o nā mea ʻino;E hōʻalo i ka loaʻa ʻana o ka lā i mea e pale ai i ka wā kahiko a me ka hoʻokuʻu ʻana i nā mea ʻino.

I ka hōʻuluʻulu ʻana, ʻo ka plastic kahi mea synthetic maʻamau, i hana ʻia mai nā polymers.ʻO ka hapa nui o nā mea plastik he palekana a ʻaʻohe pōʻino ma lalo o nā kūlana maʻamau o ka hoʻohana ʻana, akā aia kekahi mau mea plastik i loko o nā kemika e pōʻino i ke olakino kanaka.I mea e hōʻoiaʻiʻo ai i ka palekana o nā huahana plastik, pono e hoʻokō i nā lula pili a me nā kūlana, a me ka hoʻohana pono a me ka hoʻokuʻu ʻana i nā huahana plastik.