He mea ino anei ka Thermoplastic Polymers?
ʻO nā polimer thermoplastic He ʻano ʻilika hiki ke hoʻoheheʻe ʻia a hoʻololi hou ʻia i nā manawa he nui me ka ʻole o ka hoʻololi ʻana i nā kemika nui. Hoʻohana nui ʻia lākou i nā ʻoihana like ʻole, me ka hoʻopili ʻana, ka automotive, kūkulu, a me nā lāʻau lapaʻau. Eia nō naʻe, ke ulu nei ka hopohopo e pili ana i nā mea ʻona o nā polymers thermoplastic a me kā lākou hopena i ke olakino kanaka a me ke kaiapuni.
ʻO ka ʻona o nā polymers thermoplastic depee pili ana i kekahi mau kumu, e like me kā lākou haku mele ʻana, nā mea hoʻohui, a me nā ʻano hana. ʻO kekahi mau polymers thermoplastic, e like me ka polyvinyl chloride (PVC), loaʻa nā kemika ʻona e like me ka phthalates, ke kēpau, a me cadmium, hiki ke hoʻoheheʻe i waho o ka mea a hoʻohaumia i ke kaiapuni a me ke kaulahao meaʻai. PVC ʻike ʻia hoʻi ka hoʻokuʻu ʻana i nā dioxins, kahi hui ʻawaʻawa o nā kemika e hiki ke hoʻoulu i ka maʻi kanesa, nā pilikia hānau a me ka ulu ʻana, a me ka pōʻino o ka ʻōnaehana pale.
ʻO nā polymers thermoplastic ʻē aʻe, e like me ka polyethylene (PE) a polypropylene (PP), ua manaʻo ʻia ʻoi aku ka palekana a ʻoi aku ka ʻona ma mua o PVC. Eia nō naʻe, loaʻa paha iā lākou nā mea hoʻohui e like me stabilizers, antioxidants, a me plasticizers, hiki ke loaʻa i nā hopena olakino inā e neʻe lākou i waho o ka mea a komo i ke kino. No ka laʻana, ua hoʻopili ʻia kekahi mau plasticizers i hoʻohana ʻia i ka PE a me ka PP, e like me ka bisphenol A (BPA) a me nā phthalates, i nā pilikia hormonal, nā pilikia ulu, a me ke kanesa.
ʻO ka ʻona o nā polymers thermoplastic kekahi depends ma kā lākou hana hana. Hiki i kekahi mau hana kaʻina hana, e like me ka hoʻoheheʻe ʻia ʻana a me ka extrusion, hiki ke hoʻohua i nā ʻawaʻawa a me nā ʻāpana hiki ke hōʻeha i nā limahana a me ke kaiapuni. No ka laʻana, ʻo ka hana ʻana o ka polycarbonate (PC), kahi polymer thermoplastic i hoʻohana ʻia i nā mea uila a me nā mea lapaʻau, e pili ana i ka hoʻohana ʻana i ka bisphenol A (BPA), kahi kemika i hoʻopili ʻia i ka hoʻopau ʻana i ka hormonal a me ka maʻi kanesa.
No ka hoʻohaʻahaʻa ʻana i nā mea ʻona o nā polymers thermoplastic, ua hoʻomohala ʻia nā ʻano hoʻoponopono a me nā kūlana e kaupalena ʻia ai ka hoʻohana ʻana i nā kemika weliweli a hōʻoia i ka palekana o nā limahana a me nā mea kūʻai aku. No ka laʻana, ka EurUa pāpā ʻo opean Union i ka hoʻohana ʻana i kekahi mau phthalates i nā mea pāʻani a me nā huahana mālama keiki, a ua kaupalena ʻo ʻAmelika i ka hoʻohana ʻana i ke kēpau a cadmium i nā huahana mea kūʻai aku. Eia kekahi, ua hoʻomohala kekahi mau ʻoihana i nā mea ʻokoʻa palekana i nā polymers thermoplastic kuʻuna, e like me nā plastic biodegradable i hana ʻia mai nā kumuwaiwai hou.
I ka hopena, ʻo ka ʻona o nā polymers thermoplastic depee pili ana i kā lākou haku mele ʻana, nā mea hoʻohui, a me nā ʻano hana. ʻO kekahi mau polymers thermoplastic, e like me PVC, loaʻa nā kemika ʻawaʻawa e hiki ke hoʻoheheʻe i waho o ka mea a hoʻohaumia i ke kaiapuni a me ke kaulahao meaʻai. ʻO nā polymers thermoplastic ʻē aʻe, e like me ka PE a me ka PP, ua manaʻo ʻia ʻoi aku ka palekana akā hiki ke loaʻa nā mea hoʻohui i hiki ke loaʻa i nā hopena olakino. No ka hōʻoia ʻana i ka palekana o nā limahana a me nā mea kūʻai aku, ua hoʻomohala ʻia nā lula a me nā kūlana like ʻole e kaupalena i ka hoʻohana ʻana i nā kemika weliweli a hoʻolaha i ka hoʻohana ʻana i nā mea palekana.