Zawonedwa kuti mitengo yazinthu zama mankhwala pamsika ikupitilizabe kutsika, zomwe zikupangitsa kuti pakhale kusalinganika kwamtengo pamalumikizidwe ambiri amakampani opanga mankhwala.Kuchulukirachulukira kwamitengo yamafuta kwawonjezera kutsika kwamitengo yamakampani opanga mankhwala, ndipo chuma chopanga zinthu zambiri chamankhwala chatsika.Komabe, mtengo wamsika wa vinyl acetate watsikanso mosalekeza, koma phindu lopanga lakhalabe lokwera ndipo chuma chopanga ndichabwino.Ndiye, chifukwa chiyanivinyl acetatemsika kukhala mkulu mlingo wa chitukuko?

Pofika kumapeto kwa June 2023, mtengo wamsika wa vinyl acetate ndi 6400 yuan/ton.Malinga ndi milingo yamtengo wazinthu zopangira njira ya ethylene ndi njira ya calcium carbide, phindu la njira ya ethylene vinyl acetate ndi pafupifupi 14%, pomwe phindu la njira ya calcium carbide vinyl acetate ili pachiwopsezo.Ngakhale kutsika kosalekeza kwa mtengo wa vinyl acetate kwa chaka chimodzi, phindu la ethylene based vinyl acetate likadali lalitali, kufika mpaka 47% nthawi zina, kukhala phindu lalikulu kwambiri pakati pa mankhwala ambiri.Mosiyana ndi izi, njira ya calcium carbide ya vinyl acetate yakhala ikutayika kwa zaka ziwiri zapitazi.

Powunika kusintha kwa phindu la ethylene based vinyl acetate ndi calcium carbide based vinyl acetate, apeza kuti ethylene based vinyl acetate yakhala yopindulitsa m'zaka zingapo zapitazi, pomwe phindu lalikulu kwambiri limafikira 50% kapena kupitilira apo komanso avareji. phindu la malire a 15%.Izi zikuwonetsa kuti ethylene based vinyl acetate yakhala yopindulitsa kwambiri m'zaka ziwiri zapitazi, ndikuyenda bwino kwanthawi zonse komanso malire okhazikika a phindu.M'zaka ziwiri zapitazi, kupatulapo phindu lalikulu kuyambira Marichi 2022 mpaka Julayi 2022, njira ya calcium carbide ya vinyl acetate yakhala ikutayika nthawi zina zonse.Pofika mu June 2023, kuchuluka kwa phindu la njira ya calcium carbide vinyl acetate inali pafupifupi 20% kutayika, ndipo phindu lapakati pa njira ya calcium carbide vinyl acetate m'zaka ziwiri zapitazi inali kutayika kwa 0.2%.Kuchokera apa, zikhoza kuwoneka kuti kupambana kwa njira ya calcium carbide ya vinyl acetate ndi yosauka, ndipo zochitika zonse zikuwonetsa kutayika.

Kupyolera mu kusanthula kwina, zifukwa zazikulu zopezera phindu lalikulu la kupanga ethylene pogwiritsa ntchito vinyl acetate ndi motere: choyamba, kuchuluka kwa ndalama zopangira zinthu zosiyanasiyana kumasiyanasiyana.Mu njira ya ethylene ya vinyl acetate, mayunitsi a ethylene ndi 0,35, ndipo mayunitsi a glacial acetic acid ndi 0,72.Malinga ndi mulingo wamtengo wapatali mu June 2023, ethylene amawerengera pafupifupi 37% ya mtengo wa ethylene based vinyl acetate, pomwe glacial acetic acid ndi 45%.Chifukwa chake, pakukhudzidwa kwa mtengo, kusinthasintha kwamitengo ya glacial acetic acid kumakhudza kwambiri kusintha kwa mtengo wa ethylene based vinilu acetate, kutsatiridwa ndi ethylene.Pakukhudzidwa kwa mtengo wa calcium carbide njira ya vinilu acetate, mtengo wa calcium carbide pa njira ya calcium carbide vinyl acetate ndi pafupifupi 47%, ndipo mtengo wa glacial acetic acid wa calcium carbide njira ya vinilu acetate ndi pafupifupi 35%. .Choncho, mu njira ya calcium carbide ya vinyl acetate, kusintha kwa mtengo wa calcium carbide kumakhudza kwambiri mtengo.Izi ndizosiyana kwambiri ndi mtengo wa njira ya ethylene.

Kachiwiri, kuchepa kwa zopangira ethylene ndi glacial acetic acid kunali kofunika, zomwe zidapangitsa kuchepa kwakukulu kwa ndalama.M'chaka chatha, mtengo wa CFR Northeast Asia ethylene watsika ndi 33%, ndipo mtengo wa glacial acetic acid watsika ndi 32%.Komabe, mtengo wa vinyl acetate wopangidwa ndi njira ya calcium carbide umakhala woletsedwa makamaka ndi mtengo wa calcium carbide.M'chaka chatha, mtengo wa calcium carbide watsika ndi 25%.Choncho, potengera njira ziwiri zosiyana zopangira, mtengo wamtengo wapatali wa vinyl acetate wopangidwa ndi njira ya ethylene watsika kwambiri, ndipo kuchepetsa mtengo ndi kwakukulu kuposa njira ya calcium carbide.

Ngakhale mtengo wa vinyl acetate watsika, kuchepa kwake sikuli kofunikira monga mankhwala ena.Malinga ndi mawerengedwe, m'chaka chapitacho, mtengo wa vinyl acetate watsika ndi 59%, zomwe zingawoneke ngati zofunika, koma mankhwala ena adatsika kwambiri.Mkhalidwe wofooka wa msika wamankhwala waku China ndizovuta kusintha.Zikuyembekezeka kuti m'tsogolomu, pali kuthekera kwakukulu kuti phindu lopanga msika wogula womaliza, makamaka zinthu monga mowa wa polyvinyl ndi EVA, zisungidwe mwa kukanikiza phindu la vinyl acetate.

Pali kusalinganika kwakukulu mumsika wamakampani opanga mankhwala, ndipo zinthu zambiri zili pamtengo wokwera koma msika wogula waulesi, zomwe zimabweretsa chuma chosapanga bwino.Komabe, ngakhale akukumana ndi zovuta, msika wa vinyl acetate wakhalabe ndi phindu lalikulu, makamaka chifukwa cha kusiyana kwa ndalama zopangira zinthu zomwe zimagwiritsidwa ntchito popanga komanso kuchepetsa mtengo komwe kumabwera chifukwa cha kuchepa kwa mitengo yamtengo wapatali.Komabe, mkhalidwe wofooka wa msika wamtsogolo wamankhwala waku China ndizovuta kusintha.Zikuyembekezeka kuti m'tsogolomu, pali kuthekera kwakukulu kuti phindu lopanga msika wogula womaliza, makamaka zinthu monga mowa wa polyvinyl ndi EVA, zisungidwe mwa kukanikiza phindu la vinyl acetate.