I-PFA kanye ne-TFM PTFE Ukukhetha Okuhle Kakhulu Kwezinto Ezisetshenziswayo ze-Bellows nama-diaphragms

I-PTFE (i-polytetrafluoroethylene), eyaziwa nangokuthi i-polymer, ngokuvamile iyi-polymer yokuqala yokukhetha yama-bellows nama-diaphragms, kodwa bewazi yini ukuthi i-PTFE akuyona ukuphela kwe-polymer ongakhetha kuyo?Kulesi sihloko sizoqhathanisa amanye ama-polymers amabili - i-PFA ne-TFM - ku-PTFE njengendlela yokuzikhethela yezinto ezibonakalayo kanye nama-diaphragms.

PFA

I-PFA, noma i-Perfluoroalkoxy, kwesinye isikhathi ibizwa nge-polymer PFA.Inezici ezifana ne-PTFE, okuhlanganisa ukumelana kwamakhemikhali okuvelele futhi inokufinyeleleka kwegesi ephansi kakhulu.Akuyona i-hydrophobic njenge-PTFE, noma kunjalo, futhi imunca amanzi athe xaxa.Isizathu esisodwa sokuthi ingakhethwa ngaphezu kwe-PTFE amandla ayo okugcina amandla ayo emishini emazingeni okushisa aphezulu, noma ngabe ihlanganiswe namakhemikhali e-caustic.Ibuye ibe nakho kokubili ukuhamba okuhle kakhulu, izakhiwo zokukhathala kanye nokuzinza kokushisa.Isevisi yayo enkulu eqhubekayo ekushiseni ngu-260°C.

I-PFA ibuye ibe nezinto eziningi ezihlukahlukene uma kuziwa ekutheni izingxenye zingenziwa kanjani;isibonelo, iboleka kahle ku-extrusion, ukubumba umjovo, ukubunjwa kokudlulisa, ukubunjwa kokushaywa, nokubunjwa kokucindezela.Ngokuvamile uzobona i-PFA isetshenziselwa imishini yelebhu yepulasitiki ngenxa yokungangeni kwayo kwamakhemikhali okuvelele, futhi ukuguquguquka kwayo kukwenze kwaba ukukhetha okudumile kokufaka amashubhu ekusetshenzisweni kwamakhemikhali amaningi.Kudume futhi kuma-semiconductor kanye nezicelo zemithi.

I-TFM

Kungenzeka ukuthi uzwile nge-TFM, noma i-PTFE-TFM.I-TFM iyisizukulwane sesibili se-PTFE ehlanganisa isilungisi esengeziwe esibizwa nge-Perfluoro(propyl vinyl ether).Lesi silungisi senza isakhiwo sayo se-polymer siminyene kune-PTFE, sehlise ukungena kwayo kwegesi ngaphansi kwalokho kwe-PTFE kodwa kungabi ngaphansi njenge-PFA.Ugqinsi olufanayo lwe-TFM lunomphumela ovimbelayo ophindwe kabili njenge-PTFE.Ukumuncwa kwawo amanzi kuqhathaniswa nalokho kwe-PTFE, okuhle kakhulu.Njenge-PFA, isebenza kahle emazingeni okushisa aphezulu futhi ayisebenzi ngamakhemikhali kakhulu.I-TFM iphinde yajwayelana kahle nezinhlelo zokusebenza ezihlanganisa amazinga okushisa aphezulu nama-vacuum.Njenge-PFA, isebenza kahle ekusetshenzisweni kwemithi kanye ne-semiconductor.

Uma iqhathaniswa ne-PTFE, inezici zangaphezulu ezingcono nakakhulu, iqinile, futhi ayingenwa kalula kalula futhi iye yathuthukisa izici zokukhathala.Uma kuqhathaniswa ne-PTFE, iphinde ibonise ukululama okungcono kwengcindezi.Izinga lokushisa layo eliphezulu eliqhubekayo lingama-250°C, elingaphansi kancane kwe-PFA.

Izinketho zePolymer

Zombili lezi zinketho ze-polymer ziyizinketho ezinhle kakhulu zezicelo zokuhlanzeka okuphezulu, kufaka phakathi i-medical, i-pharma, i-semiconductor bellows.Ngakho-ke, ngokuzayo lapho ukhetha i-polymer bellows noma i-diaphragm, ungakhohlwa ukuthi i-PTFE akuyona ukuphela kwento ongayenza.