Umahluko phakathi kwe-PE ityhubhu kunye ne-PPR ityhubhu

Xa abasebenzisi abaninzi bekhethaImibhobho ye-PE, kudla ngokuba lula ukwenza iimpazamo ngenxa yokungaqondwa ngokwaneleyo.Abayazi nokuba basebenzise imibhobho yepolypropylene engacwangciswanga okanye imibhobho yepolyethylene kwiiprojekthi zonikezelo lwamanzi kulwakhiwo.Yintoni umahluko phakathi kwabo?Ilaphu loboya?Makhe ndikwazise.

Iingongoma eziphambili zezi zilandelayo:

Kumanzi okusela, i-PE isetyenziswa ngokubanzi njengombhobho wamanzi abandayo;I-PPR (izinto ezikhethekileyo zamanzi ashushu) zingasetyenziswa njengombhobho wamanzi ashushu;kukho kwakhona iPPR (izinto zamanzi abandayo) ezisetyenziswa njengeumbhobho wamanzi abandayo;Ukuba ngumbhobho wamanzi ashushu, ngokuqinisekileyo iPPR ingcono;(ukuba ngumbhobho wamanzi okusela wokuhlobisa ikhaya, ngoko akukho mfuneko yokwahlula, ngokusisiseko iPPR isetyenziswa ngaphezulu kwePE)Ukuba wenza imibhobho yamanzi abandayo, ungabhekisa kulo mahluko ulandelayo:

1. Ukuthelekiswa kokumelana nokushisa phakathi kombhobho wamanzi wePPR kunyeUmbhobho wamanzi we-PE.

Ngaphantsi kokusetyenziswa okuqhelekileyo, umbhobho wamanzi we-PE unokushisa okuzinzile kwe-70 ° C kunye neqondo lokushisa -30 ° C.Oko kukuthi, kwiqondo lokushisa elinjalo, ukusetyenziswa kwexesha elide lemibhobho yamanzi ye-PE ikhuselekile kwaye inokwethenjelwa.

Ngaphantsi kokusetyenziswa okuqhelekileyo, umbhobho wamanzi wePPR unobushushu obuzinzile be-70 ° C kunye nobushushu be-10 ° C.Kwakhona kubonisa ukuba kolu luhlu lweqondo lokushisa, ukusetyenziswa kwexesha elide lemibhobho yamanzi yePPR nayo ikhuselekile kwaye inokwethenjelwa.Kugqitywa ukuba imibhobho yamanzi ye-PE inokumelana nokushisa okuphezulu okufanayo njengemibhobho yamanzi yePPR.Nangona kunjalo, iipayipi zamanzi ze-PE zingcono kunemibhobho yamanzi yePPR ngokubhekiselele ekusebenzeni kweqondo lokushisa eliphantsi.

2.umahluko phakathi kwemibhobho yamanzi ye-PE kunye nemibhobho yamanzi ye-PPR ngokwemigaqo yococeko

Icandelo eliphambili leekhemikhali zemolekyuli zombhobho wamanzi we-PE yi-polyethylene.Abafundi abaye bafunda i-organic chemistry bayazi ukuba ukubunjwa kwale mveliso ziiathom zekhabhoni ezimbini ezidityaniswe neeathom ze-hydrogen ezintlanu, enye yazo idityaniswe ne-athom ye-carbon yi-double bond, emva koko i-ethylene I-molecule enye ye-polymer ipholymerized indlela ethile, kwaye imveliso enjalo yimveliso ye-polyethylene.Ngoko yintoni umbhobho wamanzi wePPR?Icandelo eliphambili lombhobho wamanzi wePPR yipropylene, oko kukuthi, ii-athomu ezintathu zekhabhoni zidibene kunye ne-athomu ye-hydrogen ezisixhenxe, kunye ne-athomu enye ye-hydrogen idibaniswe ne-athomu ye-carbon ene-double bond, kwaye ke imveliso eyenziwe emva kwe-polymerization yimveliso ye-polypropylene.Iimveliso ezinjalo ziphantse zifana ngokubhekiselele kucoceko kunye nokhuseleko.Into ebalulekileyo kukuba ingaba izinto ezisetyenziswa lishishini ziyahlangabezana na neemfuno, hayi umahluko phakathi kwezi mveliso zimbini.Kwakhona akukho ngqiqweni ukwazisa ukuba imibhobho yamanzi ye-PE icocekile ngakumbi kunemibhobho yamanzi yePPR kumaphephandaba.Yonke imibhobho yamanzi e-PE kunye neemveliso zemibhobho yamanzi ye-PPR kufuneka zihlolwe ucoceko (ngaphandle kwezo mveliso zomgunyathi nezingacacanga).Kwakhona bubuqhetseba kubathengi ukuba bathi imibhobho yamanzi ye-PE icocekile kwaye ikhuselekile kunemibhobho yamanzi yePPR.

3. Imodyuli yeelastiki

Imodyuli elastiki yombhobho wamanzi wePPR yi-850MPa.Umbhobho wamanzi we-PE ngowe-polyethylene yoxinaniso oluphakathi, kwaye imodyuli eelastiki yayo imalunga nama-550MPa kuphela.Inokuguquguquka okuhle kunye nokungonelanga kokuqina.Isetyenziswa kwintsimi yokwakha unikezelo lwamanzi.Ayimhle.

I-Thermal conductivity: Umbhobho wamanzi we-PPR ngu-0.24, umbhobho wamanzi we-PE ngu-0.42, ophantse kabini ukuphakama.Ukuba isetyenziselwa ukufudumeza umgangatho, le ngongoma yayo eyomeleleyo.Ukutshatyalaliswa kobushushu obulungileyo kuthetha ukuba umphumo wokushisa ubushushu ungcono, kodwa usetyenziswa kwimibhobho yamanzi ashushu.Ukungalungi kukuba ukuba ukutshatyalaliswa kobushushu kulungile, ukulahleka kobushushu kuya kuba kukhulu, kwaye ukushisa kombhobho kuya kuba phezulu, okulula ukutshisa.

4. Ukusebenza kwe-welding

Nangona zombini iipayipi zamanzi ze-PPR kunye neepayipi zamanzi ze-PE zinokutshisa-zinyibilikisiwe, iipayipi zamanzi ze-PPR zilula ukusebenza, kwaye i-flanging ye-PPR imibhobho yamanzi ijikeleze, ngelixa i-flanging ye-PE yepayipi yamanzi ingaqhelekanga kwaye kulula ukuyivala;ukushisa kwe-welding kukwahluke, iipayipi zamanzi ze-PPR ziyi-260 ° C, iipayipi zamanzi ze-PE Ubushushu ngu-230 ° C, kunye nomatshini okhethekileyo we-welding we-PPR imibhobho yamanzi kwimarike kulula ukugqithisa kwaye kubangele ukuvuza kwamanzi.Ukongezelela, ngenxa yokuba izinto zombhobho wamanzi we-PE zilula ukwenza i-oxidize, izixhobo ezikhethekileyo kufuneka zisetyenziselwe ukukhupha isikhumba se-oxide ebusweni phambi kwe-welding, ngaphandle koko umbhobho odibeneyo ngokwenene awunakwenziwa, kwaye umbhobho ulungele ukuvuza kwamanzi, ngoko ke. ulwakhiwo lunzima ngakumbi.

5. Amandla empembelelo yobushushu obuphantsi:

Eli nqaku linamandla ezinto zombhobho wamanzi we-PE ngokwezalathi.Imibhobho yamanzi ye-PPR yomelele kunemibhobho yamanzi ye-PE, kwaye imibhobho yamanzi ye-PE iguquguqukayo kunemibhobho yamanzi ye-PPR.Oku kuchongwa ngobume bezinto eziphathekayo, kodwa akunantsingiselo ukugqithisela ukunyanzeliswa okubandayo kweepayipi zamanzi zePPR., Imibhobho yamanzi ye-PPR isetyenziswe e-China ngaphezu kweminyaka elishumi.Abavelisi baye banciphisa ngokuthe ngcembe iingozi ezifihlakeleyo ezibangelwa kukuphathwa kakubi ngokupakishwa okusebenzayo kunye nokomeleza ukupapashwa.Ukuphathwa ngenkohlakalo kunye nokwakhiwa kuya kubangela imibhobho yamanzi e-PE kumphezulu.Imikrwelo kunye nokuqhekeka koxinzelelo;xa isetyenziswe phantsi kweemeko zobushushu obuphantsi, nawuphi na umbhobho kufuneka ugqunywe, kungenjalo ukwandiswa komthamo okubangelwa kukukhenkceza kuya kubangela ukuba umbhobho ube ngumkhenkce kwaye uqhekeke.Umbhobho wePPR ngumbhobho ofanelekileyo wemibhobho yamanzi okusela, kwaye indawo yangaphandle ayilungile nje ngaphakathi.Kusetyenziswa imibhobho ye-PE, ekwayinto efanelekileyo kwimibhobho emikhulu yamanzi.

6. Ubungakanani bombhobho

Ubungakanani obukhulu obunokwenziwa kwipayipi ye-PE yi-dn1000, kunye nokucaciswa kwePPR yi-dn160.Ke ngoko, imibhobho ye-PE isetyenziswa kakhulu njengemibhobho yokuhambisa amanzi, kwaye imibhobho yokuhambisa amanzi idla ngokuba yiPPR.