Nā ʻano maʻamau a me ka hoʻokomo ʻana i ka plastic.

ʻO ka palaki, ʻo ia hoʻi, ka pāpaʻi palaki, he ʻāpana ʻōpala i hana ʻia e ka polymerization o nā huahana hoʻomaʻemaʻe ʻaila a me kekahi mau mea kemika.Hana ʻia ia e nā mea hana e hana i nā huahana plastik o nā ʻano like ʻole.

1. Ka hoʻokaʻawale ʻana o nā plastics: Ma hope o ka hana ʻana a me ka hoʻomehana ʻana, hiki ke hoʻokaʻawale ʻia nā plastics i ʻelua mau ʻāpana: thermoplastic a me thermosetting.Eia nā mea maʻamau:
1) PVC—polyvinyl chloride
2) PE—polyethylene, HDPE—polyethylene kiʻekiʻe kiʻekiʻe, LDPE—polyethylene haʻahaʻa haʻahaʻa.
3) PP—Polypropylene
4) PS—ʻo ka polystyrene
5) ʻO nā mea paʻi maʻamau ʻē aʻe he PC, PT, PET, EVA, PU, ​​KOP, Tedolon, etc.

2. ʻAno ʻike maʻalahi o nā ʻano plastik like ʻole:
E hoʻokaʻawale e like me ke ʻano:
1) He palupalu ka lipine PVC a maikaʻi loa ka hoʻonui.Eia kekahi, aia kekahi mau mea paakiki a hu'a paha, e like me na paipu wai, na pani puka, a pela aku.
2) PS, ABS, ʻoluʻolu a palupalu ke ʻano, maʻamau ka hoʻoheheʻe ʻana i ka ʻili.
3) He māmā ka HDPE i ka PE, maikaʻi i ka paʻakikī a me ka opaque, ʻoiai ʻo LDPE he ductile iki.
4) Loaʻa i ka PP kekahi ʻike a he palupalu.

Hoʻokaʻawale e like me nā waiwai kemika:
1) Hiki ke hoʻoheheʻe ʻia ʻo PS, PC a me ABS i toluene e ʻino ai i ko lākou mau ʻili.
2) ʻAʻole hiki ke hoʻoheheʻe ʻia ka PVC me ka benzene, akā hiki ke hoʻoheheʻe ʻia me ka ketone solvent.
3) ʻO ka PP a me ka PE he kūpaʻa alkali maikaʻi a me ke kūpaʻa hoʻoheheʻe maikaʻi.

Hoʻokaʻawale e like me ka flammability:
1) Ke puhi ʻia ʻo PVC i ke ahi, e hoʻopau ia i ka ʻala o ka chlorine, a haʻalele ke ahi, ʻaʻole ia e ʻā.
2) E hoʻoulu ka PE i kahi ʻala waxy i ka wā e ʻā ana, me nā kulu waxy, akā ʻaʻole ʻo PP, a e hoʻomau ʻia nā mea ʻelua ma hope o ka haʻalele ʻana i ke ahi.

3. ʻO nā hiʻohiʻona o nā plastik like ʻole
1) Nā hiʻohiʻona o PP: ʻOiai ʻo PP he māliko, maʻalahi kona ʻano e wāwahi, ʻoi aku ka maikaʻi no ka hoʻopili ʻana i ka meaʻai.Hiki ke loaʻa nā ʻano huahana like ʻole ma o ka hoʻomaikaʻi ʻana i ko lākou mau hemahema haki.No ka laʻana: Hoʻonui ʻia ka OPP a me PP no ka hoʻomaikaʻi ʻana i ko lākou ikaika, ka mea maʻamau i hoʻohana ʻia i loko o ka ʻeke o waho o nā kāwele pepa a me nā kuki.
2) Nā hiʻohiʻona o PE: Hana ʻia ka PE me ka ethylene.ʻO ka mānoanoa o LDPE ma kahi o 0.910 g/cm-0.940 g/cm.Ma muli o kona paʻakikī maikaʻi loa a me ka hiki ke hoʻomaʻamaʻa i ka moisture, hoʻohana pinepine ʻia i ka ʻeke meaʻai, ka hoʻopili ʻana, etc.ʻO ka nui o ka HDPE ma kahi o 0.941 g/cm a i ʻole.Ma muli o kona ʻano māmā a me ke kūpaʻa wela, hoʻohana pinepine ʻia i nā ʻeke lima a me nā ʻeke ʻoluʻolu like ʻole.