Vinyl Acetate Monomer (Sinopec VAM)
Vinyl acetate ama vinyl acetate monomer (VAM) ayaa ugu horrayn loo isticmaalaa sidii monomer ahaan soo saarista kiimikooyinka kale ee loo isticmaalo codsiyada warshadaha iyo badeecadaha kala duwan.
Waa maxay monomer?
monomer waa molecule lagu xidhi karo molecules kale oo isku mid ah si loo sameeyo polymer.
polymers-ku salaysan VAM, oo ay ku jiraan vinyl chloride-vinyl acetate copolymer, polyvinyl acetate (PVA) iyo polyvinyl alkohol (PVOH), ayaa loo isticmaalaa codsiyo kala duwan.
Marka polymers-ka lagu sameeyo VAM, vinyl acetate ee loo isticmaalo soosaarkooda si buuxda ayaa loo wada baabbi'iyaa, taas oo macnaheedu yahay in ay jirto oo kaliya hadhaaga haddii wax suurtagal ah oo ku saabsan VAM lafteeda alaabtan.
Xabagta iyo Xabagta: PVA waxay leedahay sifooyin adag oo ku dheggan agabyo kala duwan, oo ay ku jiraan warqad, alwaax, filimaan caag ah iyo biraha, waana shay muhiim ah oo ku jira xabagta alwaax, xabagta cad, xabagta nijaarka iyo xabagta dugsiga.PVOH waxaa loo isticmaalaa filimaanta baakadaha xabagta;waa biyo-milmi karaan oo waxay ahaanaysaa dabacsanaan marka ay da' noqoto.
Rinjiyeynta: polymers-ku-saleysan VAM ayaa loo isticmaalaa soo saarista rinjiyada cinjirka gudaha oo badan sida walaxda bixisa ku dheggan dhammaan maaddooyinka iyo dhalaalka dhammaadka.
● Dharka: PVOH waxa loo isticmaalaa wax-soo-saarka dunta si loo cabbiro xajmiyada fidsan, habkaas oo duntu lagu dahaadhay filim difaac ah si loo yareeyo jebinta xilliga tolmada.
● Dahaarka: PVOH waxa loo isticmaalaa daahaarka sawir-qaadista.Waxa kale oo loo isticmaalaa soo saarista polyvinyl butyral (PVB), xabagta leh xabag adag, cad iyo adayg.PVB waxaa inta badan loo isticmaalaa muraayadaha la dhejiyay ee baabuurta iyo dhismayaasha ganacsiga;waxay bixisaa dhexgal difaac oo hufan oo ku xidhan laba muraayadood oo quraarad ah.Waxa kale oo loo isticmaali karaa dahaarka iyo khadadka.Soosaarayaasha VAM-ku-salaysan ayaa sidoo kale loo isticmaalaa dahaadh ahaan aflaanta caaga ah ee baakadaha cuntada.
● Wax ka beddelka istaarijka cuntada: VAM waxa loo isticmaali karaa qayb ahaan beddelayaasha istaarijka cuntada.Istaarijka cuntada ee la beddelay waxa caadi ahaan loo isticmaalaa cunto lagu daro isla sababaha istaarijka caadiga ah loo isticmaalo: in la adkeeyo, la dejiyo ama lagu damiyo cuntooyinka sida maraqa, suugo iyo maraqa.
● Dhumucyada: PVOH waxa loo isticmaalaa sida walaxda dhumucda dareerayaasha qaarkood.Walaxyada dhumucda ayaa lagu dari karaa dareerayaasha qaarkood si ay u caawiyaan daawaynta dysphagia, ama liqidda adkaanta, iyo in laga caawiyo waxa ku jira cabitaannada fudud in ay si siman u qaybsanto.
● Insulation: VAM waxaa lagu cunaa soo saarista ethylene vinyl acetate (EVA), oo loo isticmaalo xargaha iyo xargaha xargaha sababtoo ah dabacsanaantiisa, adkeysigeeda iyo sifooyinkeeda ololka.
● Resin Barrier: Isticmaalka sii kordhaya ee VAM waa soo saarista alkolada ethylene vinyl (EVOH), kaas oo loo isticmaalo sida resin xannibaadaha baakadaha cuntada, dhalooyinka caaga ah, iyo haamaha shidaalka, iyo polymers injineernimada.Resins Barrier waa baco loo isticmaalo baakadaha cuntada si ay uga hortagaan gaaska, uumiga ama dareeraha oo ay ka caawiyaan inay cuntadu noqoto mid cusub.
Taangiga xeebta VAM ee ku yaala Jiangyin, Nanjing iyo Jingjiang in ka badan 10000cbms. Ku tiirsanaanta taas oo, aasaasay taangiyada xeebta si ay si dhow ula shaqeeyaan la-hawlgalayaasheeda caalamiga ah oo ay bixiyaan adeegga ugu wanaagsan ee macaamiisha caalamiga ah.
