I-Polyvinyl Chloride (PVC) ingenye yama-polmoplastic asetshenziswa kakhulu emhlabeni jikelele (eduze kokumbalwa okusetshenziswa kakhulu amapulasitiki afana ne-pet ne-PP). Kuyinto emhlophe ngokwemvelo futhi kakhulu (ngaphambi kokungezwa kwamapulasitiki). I-PVC ibilokhu ihamba isikhathi eside kunamapulasitiki amaningi aqala ukuhlanganiswa ngo-1872 futhi akhiqizwa ngezentengiso inkampani ye-BF Goodrich ngawo-1920. Ngokuqhathanisa, amanye amapulasitiki amaningi ajwayelekile aqala ukuhlanganiswa futhi asebenza ngokuthengisa kuphela ngawo-1940 nawo-1950. Isetshenziswa kakhulu embonini yezokwakha kepha isetshenziselwa futhi izibonakaliso, izinhlelo zokusebenza zezokunakekelwa kwempilo, kanye nefayibha yezingubo.
I-PVC ikhiqizwa ngezindlela ezimbili ezijwayelekile, okokuqala njenge-polymer eqinile noma engathandeki (i-RPVC noma i-UPVC), bese okwesibili njengepulasitiki eguquguqukayo. I-Flexible, i-PVC ehleliwe noma ejwayelekile ithambile futhi ingenakuthobeka ekugobeni kune-UPVC ngenxa yokwengeza amapulasitiki afana nama-phthalates (isib. DiSonyl perthalate noma iDinp). I-Flexible PVC isetshenziswa kakhulu ekwakheni ekwakheni izintambo zikagesi noma phansi amakhaya, izibhedlela, izikole, kanye nezinye izindawo ezilindile lapho kuvela khona irabha.
I-RIRRID PVC nayo isetshenziswa ekwakheni ipayipi lokufaka amapayipi kanye nokuqothuka okuvame ukubizwa ngegama elithi "Vinyl" e-United States. I-PVC Pipe ivame ukubizwa ngokuthi "isheduli" yayo (isib. Hlela isheduli 40 noma isheduli 80). Umehluko omkhulu phakathi kwamashejuli ufaka izinto ezifana nodonga, isilinganiso sokucindezela, nombala.
Ezinye zezimpawu ezibaluleke kakhulu zePVC zifaka phakathi intengo yayo ephansi, ukumelana nokuwohloka kwemvelo (kanye namakhemikhali nama-alkalies), ubulukhuni obuphezulu, kanye namandla ashubile avelele ngepulasitiki epulasitiki eqinile ye-PVC. Itholakala kabanzi, isetshenziswa kakhulu futhi iphinde isetshenziswe kabusha (ihlukaniswe nge-resin ukukhomba ikhodi "3").
Isikhathi sePosi: Feb-02-2021
