Kusukela ngo-2019 kuya ku-2023, isilinganiso sokukhula sonyaka somthamo wokukhiqiza we-PVC sasingu-1.95%, kanti umthamo wokukhiqiza wanda kusuka kumathani ayizigidi ezingu-25.08 ngo-2019 kuya kumathani ayizigidi ezingu-27.92 ngo-2023. Ngaphambi kuka-2021, ukuncika kokungenisa impahla bekulokhu kucishe kube ngu-4%, ikakhulukazi ngenxa yentengo ephansi yemithombo yangaphandle kanye nobunzima bokushintsha eminye imikhiqizo esezingeni eliphezulu.

Phakathi neminyaka emithathu ka-2021-2023, amandla okukhiqiza i-PVC anda, kuyilapho ukungeniswa kwamanye amazwe nakho kwanda ngokushesha, ngoba amanye amadivayisi angaphandle athintwe yi-force majeure, ukunikezwa kwathinteka, futhi intengo yayingenazo izinzuzo zokuncintisana ezisobala, futhi ukuncika kokungeniswa kwamanye amazwe kwehle kwaba ngaphansi kuka-2%. Ngesikhathi esifanayo, kusukela ngo-2021, imakethe yokuthumela i-PVC yaseShayina ikhule ngokushesha, futhi ngaphansi kwenzuzo yentengo, ithandwe yiNdiya, iNingizimu-mpumalanga ye-Asia namanye amazwe, futhi isimo sokuthumela i-PVC sinomthelela okhulayo emakethe yasekhaya. Amandla okukhula ngokushesha kwezinto ze-ethylene abangela ingxenye enkulu, ngaleyo ndlela kuqiniswe ukuncintisana phakathi kwemikhiqizo ye-calcium carbide kanye nenqubo ye-ethylene. Ngokombono wokusatshalaliswa kwesifunda kwamandla okukhiqiza amasha, amandla okukhiqiza amasha ngo-2023 agxile kakhulu eShandong naseNingizimu China.

Umthamo wokukhiqiza waminyaka yonke ka-2023 ngokwehluka kwenqubo, ikakhulukazi ugxile emabhizinisini e-calcium carbide, okwenza u-75.13% wamandla okukhiqiza kazwelonke, ngoba iShayina iyizwe elinamalahle amaningi namafutha amancane, futhi amalahle asatshalaliswa kakhulu esifundeni esisenyakatho-ntshonalanga, enyakatho-ntshonalanga ithembele kumalahle acebile, izinsiza ze-calcium carbide, futhi amabhizinisi ayizikhungo zokusekela ezihlanganisiwe kakhulu, ngakho-ke amandla okukhiqiza e-PVC esifundeni esisenyakatho-ntshonalanga makhulu kakhulu. INyakatho China, iMpumalanga China, iNingizimu China eminyakeni yamuva, amandla amasha ikakhulukazi amandla okukhiqiza e-ethylene, ngenxa yolwandle, ukuthuthwa okulula, ukungenisa izinto zokusetshenziswa kanye nokuthuthwa.

Ngokombono wesifunda, isifunda esisenyakatho-ntshonalanga sisahamba phambili ngamathani ayizigidi ezingu-13.78 omthamo wokukhiqiza. Ngokusho kwezinguquko zesifunda, iNingizimu China yengeze amathani angu-800,000 ukuze yengeze igebe lesidingo sendawo, ngenxa yalokhu, ukudluliselwa kwezinsiza eNyakatho China kuya esabelweni semakethe saseNingizimu China kunciphile, iNyakatho China yengeze kuphela isethi yamathani angu-400,000 emishini, kanti ezinye izifunda azinawo umthamo omusha. Sekukonke, ngo-2023, umthamo wokukhiqiza waseNingizimu China, eNyakatho China kanye naseNyakatho-ntshonalanga China kuphela ozokhula, ikakhulukazi eNingizimu China, lapho ukwanda kwamandla okukhiqiza kunomthelela omkhulu. Umthamo omusha ngo-2024 uzoba ikakhulukazi eMpumalanga China.

Kusukela ngo-2019-2023, amandla embonini ye-PVC yaseShayina aqhubeka nokukhula, eqhutshwa ukwanda kwaminyaka yonke kokukhiqiza eminyakeni yamuva nje, amandla okukhiqiza i-PVC yasekhaya aqhubeke nokukhula, kusukela ngo-2019-2023 iminyaka emihlanu yokwandiswa kwamandla angamathani ayizigidi ezingu-2.84.

Ngenxa yezinguquko ekukhuleni kwamandla aseShayina kanye namaphethini okunikezwa nokufunwa kwamanye amazwe, ukuthunyelwa kwempahla olwandle nezinye izici nezinkomba, ukungeniswa kwempahla eShayina kuye kwehla njalo, futhi ukuncika kokungeniswa kwempahla kulindeleke ukuthi kwehle ku-1.74% ngo-2023. Ngokuhamba kwesikhathi, ngokwanda kokunikezwa kwempahla yasekhaya, ukuthuthukiswa kwekhwalithi yomkhiqizo, igebe lokunikezwa kwempahla yasekhaya esikhathini esizayo lizoncipha kancane kancane.