Polycarbonate(PC) loaʻa nā pūʻulu carbonate ma ke kaulahao molekala. Wahi a nā pūʻulu ester ʻokoʻa i loko o ka molecular structure, hiki ke hoʻokaʻawale ʻia i nā hui aliphatic, alicyclic a me nā mea ʻala. I waena o lākou, ʻo ka hui aromatic ka waiwai kūpono loa. ʻO ka mea nui loa, ʻo ia ka bisphenol A polycarbonate, me ke kaumaha maʻamau awelika molecular weight (MW) o 200000 a 100000.

Loaʻa i ka Polycarbonate nā waiwai piha maikaʻi, e like me ka ikaika, ka paʻakikī, ka ʻike, ka pale wela a me ke kū anuanu, ka hana maʻalahi a me ka retardancy ahi. ʻO nā kahua noi nui ma lalo o nā lako uila, metala a me nā kaʻa. ʻO kēia mau ʻoihana ʻekolu e pili ana i ka 80% o ka hoʻohana ʻana i ka polycarbonate. Hoʻohana nui ʻia nā māla ʻē aʻe i nā ʻāpana mīkini ʻenehana, CD, ʻeke, nā lako keʻena, nā mālama olakino, nā kiʻiʻoniʻoni, nā leʻaleʻa a me nā lako pale, a ua lilo i hoʻokahi o nā ʻāpana ulu wikiwiki loa o nā plastic engineering ʻelima.
Me ka holomua o ka ʻenehana localization, ua ulu wikiwiki ka localization o ka ʻoihana PC o Kina i nā makahiki i hala. Ma ka hopena o 2022, ua ʻoi aku ka nui o ka ʻoihana PC o Kina ma mua o 2.5 miliona tons / makahiki, a ʻo ka hopena ma kahi o 1.4 miliona tons. I kēia manawa, ʻo Kesichuang (600000 tons / makahiki), Zhejiang Petrochemical (520000 tons / makahiki), Luxi Chemical (300000 tons / makahiki) a me Zhongsha Tianjin (260000 tons / makahiki).
Loaʻa i nā kaʻina hana ʻekolu PC
ʻEkolu kaʻina hana no PC: kaʻina non phosgene, kaʻina transesterification a me ka interfacial polycondensation phosgene process. Loaʻa nā ʻokoʻa ʻokoʻa i nā mea maka a me nā kumukūʻai i ke kaʻina hana. ʻO nā kaʻina hana ʻekolu e lawe mai i nā pae waiwai like ʻole no PC.
I nā makahiki ʻelima i hala iho nei, ua hōʻea ka loaʻa kālā o ka PC o Kina i ka pae kiʻekiʻe loa ma 2018, a hiki i kahi 6500 yuan/ton. Ma hope mai, ua emi ka pae waiwai i kēlā me kēia makahiki. I ka makahiki 2020 a me 2021, ma muli o ka hōʻemi ʻana o ka pae ʻai i hoʻokumu ʻia e ka maʻi maʻi, ua emi nui ke kūlana waiwai, a ʻo ke ʻano condensation phosgene ala a me ke ʻano non phosgene i hōʻike i nā poho nui.
Ma ka hopena o 2022, ʻoi aku ka kiʻekiʻe o ka loaʻa ʻana o ke ʻano transesterification i ka hana PC o Kina, a hiki i ka 2092 yuan / ton, a ukali ʻia e ke ala polycondensation phosgene, me ka loaʻa kālā ma 1592 yuan / ton, aʻo ka loaʻa ʻana o ka waiwai waiwai o ke ʻano non phosgene. ʻo 292 yuan/ton wale nō. I nā makahiki ʻelima i hala iho nei, ʻo ke ʻano transesterification ka mea ʻoi aku ka maikaʻi o ka hana ʻana i ke kaʻina hana PC o Kina, ʻoiai ʻo ke ʻano non phosgene ka mea nāwaliwali loa.
Ka nānā 'ana i nā mea e pili ana i ka pono o ka PC
ʻO ka mea mua, ʻo ke kumukūʻai o ka bisphenol A a me DMC ka hopena pololei i ke kumukūʻai PC, ʻoi aku ka nui o ke kumukūʻai o ka bisphenol A, ʻoi aku ka nui o ke kaumaha ma mua o 50% ma ke kumukūʻai PC.
ʻO ka lua, ʻo ka hoʻololi ʻana i ka mākeke mea kūʻai aku, ʻoi aku ka nui o ka macroeconomic fluctuations, he hopena pololei i ka mākeke mea kūʻai aku PC. No ka laʻana, i ka manawa o 2020 a me 2021, i ka wā e hoʻopilikia ai ka maʻi maʻi, ua emi ka nui o ka hoʻohana ʻana o ka mākeke mea kūʻai aku ma nā PC, e hopena ana i ka emi nui o nā kumukūʻai PC a me ka hopena pololei i ka loaʻa kālā o ka mākeke PC.
Ma 2022, e koʻikoʻi ka hopena o ka maʻi ahulau. E emi mau ana ke kumukūʻai o ka aila ʻaila, a ʻilihune ka mākeke kūʻai. ʻAʻole i hōʻea ka hapa nui o nā kemika o Kina i nā palena waiwai maʻamau. Ke emi nei ke kumu kūʻai o bisphenol A, haʻahaʻa ke kumu kūʻai o ka PC. Eia kekahi, ua hoʻihoʻi hou ka lalo i kekahi ʻano, no laila ua mālama nā kumukūʻai o nā ʻano kaʻina hana like ʻole o ka PC i ka waiwai ikaika, a ke hoʻomaikaʻi mālie nei ka loaʻa kālā. He huahana kakaikahi me ka waiwai nui ma ka ʻoihana kemika o Kina. I ka wā e hiki mai ana, e lohi mau ana ka mākeke bisphenol A, a ke kokoke mai nei ka Spring Festival. Inā hoʻokuʻu ʻia ka mana maʻi maʻi ma ke ʻano maʻamau, e ulu paha ka makemake o nā mea kūʻai aku i kahi nalu, a hiki ke hoʻomau i ka ulu ʻana o ka loaʻa kālā PC.