Isbedelka mugga soo dejinta Shiinaha ee laga soo dejiyo 2004-2021 waxaa lagu arki karaa afar marxaladood oo ah isbadalka mugga soo dejinta ee Shiinaha illaa 2004, sida hoos lagu faahfaahiyay.

Marxaladda koowaad waa 2004-2007, markii baahida Shiinaha ee balaastigga ah ay hoos u dhacday iyo soo dejinta soo dejinta ee PE waxay ahayd heer hoose oo ah 2008 markii rakibaadda cusub ee Shiinaha ay si xoog badan u ururiyeen oo ay dhibaato dhaqaale dhifsanaayeen.

Wejiga labaad waa 2009-2016, dhoofinta PE ee Shiinaha ayaa gashay marxalad koboc ah oo xasilloon ka dib koror aad u weyn. 2009, sababtuna tahay dammaanadda duraynta ee gudaha iyo dibedda, cabirka ganacsiga guud ee guud, baahida loo qabo in la soo dejiyo, sidaa darteed mugga soo dejinta ee 2010-ka 2010 ilaa 2010 ilaa 2010 ayaa sii kordhayay sicirka koritaanka ee ASE isbeddel sare. Marka la gaaro sannadka 2014, awoodda wax soo saarka ee PE cusub ayaa si aad ah kordhay, iyo wax soo saarka u yeelashada ee ujeedka qoyska si dhakhso leh ayuu u korodhay; Sanadkii 2016, reer Galbeedka ayaa si rasmi ah u qaaday cunaqabateynta ku saabsan Iran, iyo ilo wareedyo Iran ah ayaa aad u raba inay dhoofiyaan Yurub sicirka sare, waqtigaas oo ah waqtiga mugga keenida gudaha ee dib loo soo celiyo.

Marxaladda saddexaad waa 2017-2020, mugga mugga soo dejinta ee Shiinaha ayaa sii kordhaya sannadka 2017, soosaarka PE gudaha iyo ajnabiga ee Shiinaha iyo dibada, sida dal cufnaan oo caadi ah, ayaa wali ah dhoofinta awoodda wax soo saarka adduunka. 2017 Tan iyo markii lagu soo rogay mugga codka mugga ee mugga Shiinaha Cabbilku wuxuu hayaa dhexdhexaad ilaa koboc sare, oo intiina 2020 Shiine soo dejinta ee Shiinaha ee Shiine ee Shiineesku gaaro 18.53 milyan tan. Si kastaba ha noqotee, qodobada wadista kororka mugga mugga soo dejinta ee PET ee marxaladan ayaa inta badan loogu talagalay isticmaalka badeecada halkii ay ka hor imaan lahaayeen baahida degdegga ah, iyo cadaadiska tartan ee labadaba suuqyada gudaha iyo dibadaba si tartiib tartiib ah ayey u soo baxaan.

Sanadkii 2021-kii, soo dejinta Shiinaha ee soo dejinaya wajiga cusub, iyo sida ay tahay tirada tirakoobka caadiga ah ee Shiinaha ayaa si aad ah u kordhay, oo ah saciiraanyada rarka caalamiga ah ee polyethylne-ka, suuqa dibedda, suuqa soo dejinta ayaa noqon doonta si weyn hoos loogu dhigay 2021. Boqolkiiba waxsoosaarka Shiinaha ayaa sii wadi doona inuu ballaariyo, daaqadda gar-qaadidda ee gudaha iyo dibadda ee suuqa la soo dejiyo ayaa hoos u dhici doona, iyo in la soo dejiyo kanaalka hoostiisa mustaqbalka.

Laga soo bilaabo 2004-2021 mugga dhoofinta PE ee Shiinaha ee nooc kasta, mugga guud ee soo dejinta guud ee Shiinaha waa mid hooseeya oo codka sare waa weyn yahay.

Laga soo bilaabo 2004 ilaa 2008, mugga dhoofinta Shiinaha ayaa ahayd 100,000 oo tan. Wixii ka dambeeya Juun 2009, heerka lacag-dhiska canshuurta ee qaranka ee loo dhoofiyo balaastigga iyo wax soo saarka, sida pomoomyadooda kale ee qaab-dhismeedka aasaasiga ah, ayaa la sara kiciyey 13%, iyo xamaasadda dhoofinta ee Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe Pe pe

Sannadkii 2010-2011, kordhinta daynta PE-da gudaha ah ayaa iska cad, laakiin intaas ka dib, dhoofinta PE-da ee PE PE, waxaa ku adag in la kordhiyo dhoofinta ee ku saleysan qiimaha, baahida tayada iyo caqabadaha xaalada gaadiidka.

Laga soo bilaabo 2011 illaa 2020, mugga dhoofinta Shiinaha ee ciriiriga ah ee Shiinaha oo cidhiidhi ah, oo mugga dhoofinta ah ayaa asal ahaan ahayd intii u dhaxeysay 200,000-300,000 tan. 2021, mugga dhoofinta Shiinaha ayaa sareysa, wadarta guud ee dhoofinta sanadlaha ah ee la gaadhay 510,000 tan, koror ka mid ah 260,000 tan oo la barbardhigay 2020, oo ah 104% sano-sano-sano-sano.

Sababta ayaa ah in ka dib 2020, dib-u-habeynta weyn ee Shiinaha iyo dhirta Hydrocarbon ee fudud ayaa si wax ku ool ah loo sii kordhin doonaa, gaar ahaan noocyada Hdpe ee Shiinaha, iyadoo kheyraadka badan ee HDPE loo qorsheeyay dhirta cusub iyo cadaadiska tartanka suuqa. Bixinta ayaa ah mid adag, iyo iibinta ilaha PKA ee Shiinaha ee South America iyo meelaha kale ayaa sii kordhaya.

Kororka joogtada ah ee kartida wax soo saarka waa dhibaato daran oo ay tahay in la wajaho dhinaca saadka ee PE Shiine. Haatan, sababta oo ah caqabadaha kharashka, baahida tayada iyo xaaladaha gaadiidka, weli way adag tahay in la dhoofiyo PE gudaha ah, laakiin koritaanka joogtada ah ee awoodda wax soo saarka gudaha, waxaa muhiim ah in lagu adkeeyo iibka dibadeed. Cadaadiska ah ee PE caalamiga ah ee mustaqbalka mustaqbalka ayaa sii kordhaya, iyo qaabka saadka iyo baahida ka jirta suuqyada gudaha iyo suuqyada dibedda ayaa wali u baahan feejignaan dheeraad ah.