mea hoʻopaʻa
ʻO nā Stabilizers he "mea hoʻohui i hoʻohui ʻia" i hoʻohana ʻia no ka pale ʻana i nā polymers mai nā hopena kaiapuni (wela, kukui UV, etc.). Hoʻohui ʻia lākou i nā plastics no ka pale ʻana i ka polymer mai ka wela (thermal), UV a me ka mechanical degradation i ka wā o ka hana ʻana a me ka hoʻohana ʻana. Hana lākou ma ke ʻano he antioxidants, thermal (thermal) a me ka māmā/māmā (UV) stabilizers, nā mea hoʻopaʻa ahi a me nā scavengers oxygen. No ka PVC, kokoke ka mahana decomposition wela i ka mahana o ke kaʻina hana, no laila pono ka hoʻohana ʻana i nā stabilizers wela kūpono i ka wā a ma hope o kāna hana ʻana.
Loaʻa paha i kekahi mau stabilizer kekahi mau metala koʻikoʻi a i ʻole ko lākou mau ion (e laʻa me nā mea hoʻopaʻa no nā kiʻi pukaaniani PVC a me nā paipu ma ke alakaʻi-a i ʻole ka barium, cadmium a i ʻole nā pūhui zinc, ʻo ia hoʻi, hoʻohana pono ʻia nā pūhui organo-no ka hoʻopaʻa ʻana o UV), hiki ke hoʻopilikia i ke olakino.
ʻO nā mea pale wela nui i loaʻa no PVC:
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ʻO nā pūhui kepau (ʻo ka nui o ka lead sulfate a me ke lead stearate). ʻO nā ʻano kēpau āpau he mea ʻawaʻawa loa ia i ke kanaka ma muli o kā lākou hopena kumulative. Ua hōʻike nā haʻawina e hiki ke hoʻopōʻino i ka lolo, ke kīnā o ke aʻo ʻana, ke koko kiʻekiʻe a me ka hāʻule ʻole. 'O ka 'ike 'ana i ke alaka'i-wai i ho'ohaumia 'ia, he pilikia laha loa ia me nā pilikia nui o ke ola kino. Ke hoʻokomo ʻia ma ka ʻōpū o ka ʻōpū, hiki ke hoʻonui ʻia ke kēpau i loko o nā ʻōpū a me nā iwi, a hiki i nā maʻi like ʻole mai ka anemia a hiki i ka degeneration neurological (Godwin, 2001). Manaʻo ʻo WHO i ka pae alakaʻi o 10 ug/l i ka wai inu (WHO, 2006).
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ʻO nā pūhui organotin ka nui o ka monobutyltin (MBT), dibutyltin (DBT) a me ka tributyltin (TBT). Hoʻohui ʻia, ʻo dimethyltin (DMT), kahi organotin ʻē aʻe i ʻike ʻia i loko o nā lako wai home, e kū mai ana mai nā stabilizers i hoʻohana ʻia i nā huahana PVC a me chlorinated PVC (CPVC) (Ehman et al., 2007). Ua manaʻo ʻia he hoʻomau a ʻawaʻawa paha nā pūhui organotin i ke kikowaena a me nā ʻōnaehana pale, a me ke ake (Korgiesen and Rice, 1998). ʻO nā pūhui organotin ma kahi o 9.3% o ka hoʻohana stabilizer ʻEulopa (CEC, 2000).
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ʻO Cadmium (Cd) a me kāna ʻōnaehana paʻakai paʻakikī. ʻO ka Cd kahi mea make i hōʻiliʻili ʻia ma ka papa inoa o nā mea haumia weliweli he 10 kiʻekiʻe o ka United Nations Environment Program; hiki iā ia ke hōʻeha i ka puʻupaʻa a me ka anemia, a i ka wā e komo ai, hiki ke noho i loko o ke kino kanaka no 30 mau makahiki. ʻO ka inhalation o ka uahi cadmium oxide ka pōʻino nui loa, me nā hopena make he nui.
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Hoʻohana ʻia ʻo Antimony (Sb) i PVC e hoʻomaikaʻi i ka hopena pale ahi o ka chlorine.
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Pono pinepine ʻia nā organochlorines e hoʻonui i ka retardancy ahi a me ka hopena i nā waiwai ikaika o PVC.
