Amapayipi nokufakwa kwe-PP-R kusekelwe ku-polypropylene engahleliwe njengezinto zokusetshenziswa eziyinhloko futhi akhiqizwa ngokuhambisana ne-GB / T18742.I-Polypropylene ingahlukaniswa ibe yi-PP-H (homopolymer polypropylene), PP-B (block copolymer polypropylene), kanye ne-PP-R (i-copolymer polypropylene engahleliwe).Umshini kathayela odongeni oluphindwe kabili udlala indima ebalulekile ekukhiqizeni amapayipi.I-PP-R iyinto ekhethwayo yamapayipi e-polypropylene emanzini ashisayo nabandayo ngenxa yokumelana kwayo isikhathi eside nokucindezela kwe-hydrostatic, ukuguga okungapheli kwe-oksijini ukumelana nokushisa nokucubungula nokubumba.
Iyini ishubhu le-PP-R?
Ipayipi le-PP-R libizwa nangokuthi ipayipi le-polypropylene lezinhlobo ezintathu.Isebenzisa i-copolymer polypropylene engahleliwe ukuze ikhishwe ibe yipayipi, futhi ibunjwe ngomjovo ibe yipayipi.Kuwuhlobo olusha lomkhiqizo wamapayipi epulasitiki owakhiwe futhi wasetshenziswa eYurophu ekuqaleni kwawo-1990.I-PP-R ivele ngasekupheleni kweminyaka yama-80's, isebenzisa inqubo ye-copolymerization yesigaba segesi ukwenza cishe u-5% we-PE kuchungechunge lwamangqamuzana e-PP ngokungahleliwe nange-polymerized (i-copolymerization engahleliwe) ukuze ibe isizukulwane esisha sezinto zamapayipi.Inokumelana nomthelela omuhle nokusebenza kokukhasa kwesikhathi eside.
Yiziphi izici zamapayipi e-PP-R?Ipayipi le-PP-R linezici ezilandelayo eziyinhloko:
1.non-toxic and hygienic.Ama-molecule we-PP-R ayi-carbon ne-hydrogen kuphela.Azikho izakhi eziyingozi nezinobuthi.Zihlanzekile futhi zithembekile.Azisetshenziswa kuphela kumapayipi amanzi ashisayo nabandayo, kodwa futhi asetshenziswa ezinhlelweni zamanzi okuphuza ahlanzekile.
2.Ukugcina ukushisa nokonga amandla.I-thermal conductivity yepayipi ye-PP-R ingu-0.21w / mk, okuyi-1/200 kuphela yaleyo yepayipi yensimbi.
3.ukumelana nokushisa okuhle.Iphuzu lokuthambisa i-vicat ye-tube ye-PP-R yi-131.5 ° C. Ukushisa okuphezulu okusebenzayo kungafinyelela ku-95 ° C, okungahlangabezana nezidingo zezinhlelo zamanzi ashisayo ekwakheni amanzi kanye nokucaciswa kwamanzi.
4.Impilo ende yesevisi.Ukuphila kokusebenza kwepayipi le-PP-R kungafinyelela eminyakeni engaphezu kwengu-50 ngaphansi kwezinga lokushisa elisebenzayo lika-70 ℃ kanye nengcindezi yokusebenza (PN) 1.OMpa;impilo yesevisi yokushisa okujwayelekile (20 ℃) ingafinyelela eminyakeni engaphezu kweyi-100.
Ukufakwa kwe-5.Easy nokuxhumeka okuthembekile.I-PP-R inokusebenza okuhle kwe-welding.Amapayipi nokufakwa kungaxhunywa nge-hot-melt kanye ne-welding kagesi, okulula ukuyifaka futhi enokwethenjelwa emajoyini.Amandla ezingxenye ezixhunyiwe makhulu kunamandla wepayipi ngokwayo.
6.Izinto ezisetshenziswayo zingagaywa kabusha.Imfucuza ye-PP-R iyahlanzwa futhi igaywe futhi igaywe kabusha ukuze kukhiqizwe amapayipi namapayipi.Inani lezinto ezigaywe kabusha alidluli u-10% yenani eliphelele, elingathinti ikhwalithi yomkhiqizo.
Iyiphi inkambu eyinhloko yokufakwa kwamapayipi e-PP-R?
1.Amasistimu amanzi abandayo nashisayo esakhiwo, okuhlanganisa nezinhlelo zokushisisa ezimaphakathi;
2.Isistimu yokushisa esakhiweni, kuhlanganise nephansi, i-side kanye nesistimu yokushisa ekhazimulayo;
3.Isistimu yokuhlinzeka ngamanzi ahlanzekile okuphuza ngokuqondile;
4.Isistimu ye-air-conditioning emaphakathi (maphakathi);
5.Izinhlelo zamapayipi ezimboni zokuthutha noma zokukhipha imidiya yamakhemikhali.
Isikhathi sokuthumela: May-19-2021