Imibhobho yePolypropylene (imibhobho yePP) isetyenziswa ngokubanzi ekwakheni unikezelo lwamanzi kunye nokukhupha amanzi, ukuthuthwa kwamanzi kwimizi-mveliso, kunye neenkqubo ze-HVAC ngenxa yokumelana nokugqwesa okugqwesileyo, ukukhaphukhaphu kodwa ukomelela okuphezulu, kunye nokunganyangeki kakuhle kobushushu. Iindlela zabo zokuvelisa kunye nolawulo lwekhwalithi luchaphazela ngokuthe ngqo ubomi benkonzo kunye nokuzinza kokusebenza kwemibhobho; ke ngoko, ukuthotyelwa okungqongqo kwiinkqubo zenzululwazi kunye nemigangatho kubalulekile.
Indlela ephambili yokuvelisa iipayipi zepolypropylene kukubumba kwe-extrusion. Okokuqala, -ucoceko oluphezulu lwe-polypropylene resin lukhethwa njengento ekrwada, kwaye izixa ezifanelekileyo zezinzisi, izilungisi zempembelelo, kunye nezinye izongezo zongezwa ngokweemfuno zokusetyenziswa ukuphucula ukumelana nemozulu kombhobho kunye namandla oomatshini. Emva kokumisa, izinto eziluhlaza zingena kwi-extruder, apho inyibilika kwaye iplastiki phantsi kobushushu obuphezulu (ngokuqhelekileyo i-180 ~ 230 degree) kunye ne-screw shearing ukwenza i-homogeneous melt. Emva koko, inyibilika ibunjwe kwisakhiwo se-tubular ngokufa kwaye emva koko ipholiswe kwaye iqiniswe yinkqubo yokucoca ivacuum kunye nenkqubo yokupholisa amanzi, ekugqibeleni yenze imibhobho ye-polypropylene ehlangabezana neenkcukacha.
Ngokubhekiselele kulawulo lomgangatho, ingqwalasela ephambili kufuneka ihlawulwe kucoceko lwempahla ekrwada, ulawulo lobushushu be-extrusion, kunye nesantya sokupholisa. Ukungcola kwizinto eziluhlaza kunokubangela amaqamza okanye ukuqhekeka ngaphakathi kombhobho; ngoko ke, ukuhlolwa okungqongqo kunye nokomisa unyango kuyimfuneko. Ukushisa okugqithisileyo kwe-extrusion kunokukhokelela ekuthotyweni kwe-polypropylene, ukunciphisa amandla emibhobho; ngokuchaseneyo, ukunyibilika okunganelanga kunokuchaphazela ukuguda kodonga lombhobho. Ngaphaya koko, izinga lokupholisa lichaphazela ngokuthe ngqo ubukhazikhazi bombhobho, nto leyo echaphazela ubungqongqo kunye nokumelana nempembelelo. Ngoko ke, inkqubo yokupholisa ecandekileyo iyimfuneko ukuqinisekisa ukupholisa okufanayo ngaphakathi nangaphandle kombhobho.
Ekugqibeleni, imibhobho egqityiweyo ingena kwimilinganiselo yobukhulu, uvavanyo loxinzelelo, kunye novavanyo lwexesha elide- lwe-hydrostatic ukuqinisekisa ukuthotyelwa kwemigangatho yesizwe (efana ne-GB/T 18742 okanye ISO 15874). Ukuphucula iinkqubo zemveliso kunye nokuphumeza ulawulo olungqongqo lwekhwalithi kunokuphucula ngokufanelekileyo ukuthembeka kwemibhobho yepolypropylene kunye nokuhlangabezana neemfuno zezicelo zobunjineli ezahlukeneyo.
