[Inkcazo ngokubanzi] I-Polyethylene yiplastiki, eyaziwa ngomlinganiselo wayo ophezulu woxinano, ukuguquguquka kunye nokuzinza kweekhemikhali. Ilungele ukusetyenziswa kwemibhobho yoxinzelelo kunye neyokungengoxinzelelo. Imibhobho ye-HDPE idla ngokwenziwa nge-polyethylene 100 resin, enoxinano lwe-930-970 kg/m3, oluphindwe kasixhenxe kunolwentsimbi.

I-Polyethylene yiplastiki, eyaziwa ngomlinganiselo wayo ophezulu woxinano, ukuguquguquka kunye nokuzinza kweekhemikhali. Ifanelekile ukusetyenziswa kwemibhobho yoxinzelelo kunye neyokungaxinzeleli. Imibhobho ye-HDPE idla ngokwenziwa nge-polyethylene 100 resin, enoxinano lwe-930-970 kg/m3, oluphindwe kasixhenxe kunentsimbi. Imibhobho ekhaphukhaphu kulula ukuyithutha nokuyifaka. I-Polyethylene ayichaphazeleki yinkqubo yokugqwala kwe-electrochemical, kwaye kuqhelekile ukuba imibhobho ivezwe kwityuwa, i-asidi kunye ne-alkali. Umphezulu ogudileyo wetyhubhu ye-polyethylene awuyi kugqwala, kwaye ukungqubana kuphantsi, ngoko ke ityhubhu yeplastiki ayichaphazeleki lula kukukhula kweentsholongwane. Amandla okumelana nomonakalo wokugqwala kunye nokuhamba rhoqo kwenza iimfuno zokugcinwa kwemibhobho ye-HDPe zibe phantsi kakhulu. Ityhubhu ye-polyethylene inokwenziwa nge-resin eqinisiweyo, ehlelwe njenge-PE100-RC, kwaye yongezwe ukunciphisa ukukhula kweentanda. Imibhobho eveliswayo inokuba nobomi obude benkonzo, kwaye i-polyethylene inenzuzo yezoqoqosho kumjikelo wobomi beprojekthi.

Ngoku ekubeni ukuqina kwemibhobho ye-HDPe sele kuqinisekisiwe, uqoqosho lubaluleke kakhulu xa imibhobho ye-polyethylene isetyenziswa kwiziseko zokugcina amanzi. Xa kuthelekiswa nemibhobho yentsimbi ethambileyo, eyona nzuzo icacileyo yemibhobho ye-polyethylene kukuba inokuthintela ukuvuza. Kukho iintlobo ezimbini zokuvuza kwemibhobho: ukuvuza kwamalungu, ukuvuza okuqhumileyo kunye nokuvuza okugqobhokileyo, okulula ukuziphatha.

Ubungakanani beUmbhobho we-HDPEiphakathi kwe-1600 mm kunye ne-3260 mm, kwaye iipayipi ezinkulu ezithengiswayo ngoku zingasetyenziswa. Ukongeza kwiinkqubo zokubonelela ngamanzi zikamasipala, iipayipi zeplastiki ezinkulu ezenziwe nge-polyethylene zingasetyenziswa nakwiindawo zokucoca amanzi olwandle kunye namanzi amdaka. Iipayipi ezinkulu ezinobubanzi obuphakathi zingaba phakathi kwe-315 cm ukuya kwi-1200 cm. Ububanzi obukhuluUmbhobho we-HDPeIhlala ixesha elide kwaye ithembekile. Emva kokugqunywa emhlabeni, ingasebenza amashumi eminyaka kwaye ayifuni kulungiswa kangako, ngoko ke ifanelekile kakhulu ekusetyenzisweni kokucoca amanzi amdaka. Ukuqina kombhobho we-polyethylene kuyanda njengoko ubukhulu bawo bukhula, nto leyo ebonisa ukusebenza okumangalisayo kokulwa nokungcangcazela. Umzekelo, cinga ngenyikima yaseKobe eJapan ngo-1995, iziseko zophuhliso zasezidolophini; zonke ezinye iipayipi ziyasilela ubuncinane kanye kwi-3 km nganye, kwaye yonke inkqubo yepayipi ye-HDPE ayinazo iimpazamo.

Iingenelo zepayipi ye-HDPE: 1. Uzinzo oluhle lweekhemikhali: I-HDPE ayinayo i-polarity, uzinzo oluhle lweekhemikhali, ayizalisi i-algae kunye neebhaktheriya, ayikhuli, kwaye yimveliso enobuhlobo nokusingqongileyo. 2. Amandla oqhagamshelwano afanelekileyo: sebenzisa i-socket electric fusion okanye i-butt joint thermal fusion, enezihlanganisi ezimbalwa kwaye akukho kuvuza. 3. Ukumelana nokuhamba kwamanzi okuphantsi: Umphezulu wangaphakathi weUmbhobho we-HDPeigudile, inomlinganiselo ophantsi wokuxhathisa ukuguguleka kunye nokuhamba okukhulu. 4. Ukumelana kakuhle nobushushu obuphantsi kunye nokuguguleka: ubushushu bokuguguleka buyi-(-40), kwaye akufuneki amanyathelo akhethekileyo okukhusela ekwakheni ubushushu obuphantsi. 5. Ukumelana okuhle nokuguguleka: Uvavanyo lokuthelekisa ukumelana nokuguguleka kwemibhobho ye-polyethylene kunye nemibhobho yentsimbi lubonisa ukuba ukumelana nokuguguleka kwemibhobho ye-polyethylene kuphindwe kane kunokwemibhobho yentsimbi. 6. Ukuchasana nokwaluphala kunye nobomi benkonzo ende: Umbhobho we-HDPE unokugcinwa okanye usetyenziswe ngaphandle iminyaka engama-50 ngaphandle kokonakaliswa yimitha ye-ultraviolet.