ʻO wai ka mea ʻoi aku ka maikaʻi, PET a i ʻole PP?

Ke hoʻohālikelike ʻia me nā mea PET a me PP, e ʻoi aku ka maikaʻi o ka PP i ka hana.
1. ʻO ka ʻokoʻa mai ka wehewehe ʻana
PET(Polyethylene terephthalate) inoa ʻepekema ʻo polyethylene terephthalate, ʻike mau ʻia ʻo ka polyester resin, he mea resin.
PP(polypropylene) inoa ʻepekema he polypropylene, he polymer i hana ʻia e ka polymerization hoʻohui o propylene, a he resin synthetic thermoplastic.
2. Mai nā hiʻohiʻona o ka ʻokoʻa
(1) PET
①PET he keʻokeʻo keʻokeʻo a i ʻole melemele ʻeleʻele polymer crystalline maikaʻi loa me ka ʻili ʻālohilohi.
②PET mea he maikaʻi ka luhi luhi, abrasion kū'ē a me ka dimension stability, kapa haʻahaʻa a me ka kiʻekiʻe paʻakikī, kulou ikaika o 200MPa, a me ka elastic modulus o 4000MPa.
③ ʻO ka mea PET he mea maikaʻi loa ke kiʻekiʻe a me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa, hiki ke hoʻohana ʻia no ka manawa lōʻihi i ka pae wela o 120 °C, a hiki ke kū i ke kiʻekiʻe o 150 °C no ka hoʻohana pōkole a me ka haʻahaʻa haʻahaʻa o -70 ° C.
④ ʻO ka Ethylene glycol i hoʻohana ʻia i ka hana ʻana o PET he haʻahaʻa haʻahaʻa a me ka hana kiʻekiʻe.
⑤ ʻAʻole ʻawaʻawa ka mea PET, kūpaʻa maikaʻi i nā kemika, a kūpaʻa i nā ʻakika nāwaliwali a me nā mea hoʻoheheʻe organik, akā ʻaʻole kū i ka hoʻokomo ʻana i ka wai wela a me ka alkali.
(2) PP
ʻO ①PP he mea waxy keʻokeʻo me ka ʻike a māmā. ʻO ia ke ʻano māmā o nā resins i hoʻohana mau ʻia.
ʻO ②PP ka waiwai mechanical maikaʻi a me ke kūpaʻa wela maikaʻi, a hiki ke hoʻohana mau ʻia ka mahana i 110-120 °C.
ʻO ③PP ka mea paʻa kemika maikaʻi loa a ʻaʻole pili pū me ka hapa nui o nā kemika koe wale nō nā oxidants ikaika.
④PP mea he kiʻekiʻe ka wela hoʻoheheʻe ʻana a me ka ikaika tensile, a ʻoi aku ka kiʻekiʻe o ke aniani o ke kiʻiʻoniʻoni.
⑤PP he mea hoʻokaʻawale uila maikaʻi loa, akā maʻalahi ka makahiki a he maikaʻi ʻole ka hopena i ka haʻahaʻa haʻahaʻa.
3. Nā ʻokoʻa o ka hoʻohana ʻana
Hoʻohana nui ʻia ʻo PET, e like me ka milo ʻana i ka fiber polyester, ʻo ia hoʻi, polyester; e like me ka plastic, hiki ke puhi ʻia i loko o nā ʻōmole like ʻole; e like me nā ʻāpana uila, bearings, gears, etc.
Hoʻohana nui ʻia ka mea PP i ka hana o ka injectionnā huahana hoʻoheheʻe, nā kiʻiʻoniʻoni, nā paipu, nā papa, nā fibers, nā uhi, a me nā mea ʻē aʻe, a me nā mea hana hale, ka mahu, kemika, ke kūkulu ʻana, ka ʻoihana māmā a me nā ʻano ʻē aʻe.