Posachedwapa, mtengo wamankhwala wakwera: Pali mitundu yambiri ndi mitundu yayikulu. M'mwezi wa Ogasiti, mitengo yazinthu zamagetsi yayamba kukwera. Pakati pamitengo yamankhwala 248 yomwe tidatsata, zinthu 165 zidakwera mtengo ndikuwonjezeka kwapakati pa 29.0%, ndipo zinthu 51 zokha zidatsika mtengo ndikutsika pafupifupi 9.2%. Pakati pawo, mitengo ya MDI yoyera, butadiene, PC, DMF, styrene ndi zinthu zina zakwera kwambiri.

Kufunika kwa zinthu zama mankhwala nthawi zambiri kumakhala ndi nyengo ziwiri zapamwamba, zomwe ndi Marichi-Epulo pambuyo pa Chikondwerero cha Spring ndi Seputembala-Ogasiti mu theka lachiwiri la chaka. Mbiri yakale ya China Chemical Product Price Index (CCPI) kuyambira 2012 mpaka 2020 imatsimikiziranso malamulo oyendetsera makampaniwa. Ndipo monga chaka chino, mitengo yazinthu idapitilirabe kukwera kuyambira Ogasiti, ndipo idalowa mchaka chachangu mu Novembala, 2016 ndi 2017 zokha motsogozedwa ndi kusintha kwapambali.

Mitengo yamafuta osakanizidwa imatenga gawo lofunikira kwambiri pamitengo yama mankhwala. Nthawi zambiri, mitengo yazinthu zamafuta nthawi zambiri imakwera ndikutsika mogwirizana ndi kusinthasintha kwamitengo yamafuta osakanizidwa. Komabe, pakukwera kwamitengo yazinthu zama mankhwala, mitengo yamafuta osakanizidwa yakhalabe yosasunthika, ndipo mitengo yamafuta amafuta akadali yotsika kuposa mitengo yakumayambiriro kwa Ogasiti. Kuyang'ana m'zaka zapitazi za 9, mtengo wazinthu zama mankhwala ndi mafuta osakanizika adapatuka nthawi 5 zokha, nthawi zambiri panthawi yowopsa kapena yotsika kwambiri, ndipo mitengo yamafuta osakanizidwa idakwera pomwe mitengo yazinthu zama mankhwala idakhalabe yosalala. kapena pansi. Chaka chino chokha mtengo wa mankhwala opangidwa ndi mankhwala ukukwera kwambiri, pamene mtengo wa mafuta osakanizidwa umasinthasintha. M'mikhalidwe yotereyi, kukwera kwamitengo yamankhwala kumawonjezera phindu lamakampani ogwirizana nawo.

Makampani opanga mankhwala nthawi zambiri amakhala amodzi mwamalumikizidwe am'mafakitale, ndipo ambiri mwamakasitomala awo kumtunda kapena makasitomala amakhalanso makampani opanga mankhwala. Chifukwa chake, mtengo wabizinesi A ukakwera, mtengo wabizinesi B, womwe ndi bizinesi yakumunsi, nawonso udzakwera. Poyang'anizana ndi izi, kampani B imachepetsa kupanga kapena kuyimitsa kupanga kuti achepetse kugula, kapena kukweza mtengo wazinthu zake kuti asinthe kukwera mtengo. Chifukwa chake, ngati mtengo wazinthu zakutsika ukhoza kukwera ndi maziko ofunikira pakuwunika kukhazikika kwa kukwera kwamitengo yazinthu zama mankhwala. Pakalipano, m'maketani angapo a mafakitale, mtengo wa mankhwala a mankhwala wayamba kufalikira bwino.

Mwachitsanzo, mtengo wa bisphenol A umakweza mtengo wa PC, zitsulo za silicon zimayendetsa mtengo wa organic silicon, zomwe zimayendetsa mtengo wa mankhwala a mphira ndi zinthu zina, mtengo wa adipic acid umayendetsa mtengo wa slurry ndi PA66, ndi mtengo wa MDI yoyera ndi PTMEG imayendetsa mtengo wa spandex.

Pakati pa mitengo ya mankhwala 248 yomwe tidatsata, mitengo ya 116 inali yotsika kwambiri kuposa mtengo usanachitike mliri; poyerekeza ndi nthawi yomweyi chaka chatha, mitengo ya 125 inali yotsika kuposa nthawi yomweyi chaka chatha. Timagwiritsa ntchito mtengo wapakati wazinthu mu 2016-2019 ngati mtengo wapakati, ndipo mitengo ya 140 imakhala yotsika kuposa mtengo wapakati. Panthawi imodzimodziyo, pakati pa mankhwala a 54 a mankhwala omwe timawatsatira, kufalikira kwa 21 kudakali kochepa kusiyana ndi kufalikira kusanachitike mliri; ngati kuyerekeza ndi nthawi yomweyi chaka chatha, kufalikira kwazinthu 22 ndikotsika kuposa nthawi yomweyi chaka chatha. Timagwiritsa ntchito kufalikira kwapakati kwa 2016-2019 ngati kufalikira kwapakati, ndipo kufalikira kwazinthu 27 kumakhalabe kotsika kuposa kufalikira kwapakati. Izi zikugwirizana ndi zotsatira za PPI pachaka ndi ring-on-kota.