Kev txhais ntawm HDPE
HDPE yog lub ntsiab lus feem ntau siv los xa mus rau polyethylene siab ceev. Peb kuj hais txog PE, LDPE lossis PE-HD daim hlau. Polyethylene yog cov khoom siv thermoplastic uas yog ib feem ntawm tsev neeg ntawm cov yas.
Muaj ntau hom polyethylene. Cov kev sib txawv no tau piav qhia los ntawm cov txheej txheem tsim khoom uas yuav txawv. Peb tab tom tham txog polyethylene:
• Tsawg ceev (LDPE)
• siab ceev (HDPE)
• Medium density (PEMD).
Tsis tas li ntawd, tseem muaj lwm hom polyethylene: chlorinated (PE-C), uas muaj qhov hnyav molecular heev.
Tag nrho cov ntawv luv luv thiab cov ntaub ntawv no yog tsim raws li tus qauv NF EN ISO 1043-1
HDPE yog qhov tseeb ntawm cov txheej txheem siab ceev: High Density Polyethylene. Nrog nws, peb tuaj yeem ua rau menyuam yaus cov khoom ua si, hnab yas, nrog rau cov kav dej siv los thauj dej!
HDPE yas yog tsim los ntawm roj av synthesis. Rau kev tsim khoom, HDPE suav nrog cov kauj ruam sib txawv:
• distillation
• Chav tawg
• polymerization
• granulation
Tom qab no transformation, cov khoom yog milky dawb, translucent. Nws yog qhov yooj yim heev rau cov duab lossis xim.
HDPE siv cov rooj plaub hauv kev lag luam
Ua tsaug rau nws qhov zoo thiab qhov zoo, HDPE yog siv rau ntau qhov chaw ntawm kev lag luam.
Nws muaj nyob txhua qhov chaw nyob ib ncig ntawm peb hauv peb lub neej txhua hnub. Nov yog qee qhov piv txwv:
Kev tsim lub raj mis yas thiab ntim yas
HDPE paub zoo hauv kev lag luam khoom noj, tshwj xeeb tshaj yog rau kev tsim cov raj mis yas.
Nws yog ib lub thawv zoo heev rau zaub mov lossis dej qab zib los yog tsim lub kaus mom. Tsis muaj kev pheej hmoo ntawm kev tawg vim tias tuaj yeem ua nrog iav.
Tsis tas li ntawd, HDPE yas ntim khoom muaj qhov txiaj ntsig zoo ntawm kev rov ua dua tshiab.
Tshaj li kev lag luam zaub mov, HDPE muaj nyob rau hauv lwm qhov chaw ntawm kev lag luam feem ntau:
• ua cov khoom ua si,
• Kev tiv thaiv yas rau phau ntawv,
• thawv cia
• hauv kev tsim cov canoes-kayaks
• creation ntawm beacon buoys
• thiab ntau lwm tus!
HDPE hauv kev lag luam tshuaj thiab tshuaj
Kev lag luam tshuaj thiab kws tshuaj siv HDPE vim nws muaj tshuaj tiv thaiv kab mob. Nws yog hais tias yog chemically inert.
Yog li, nws yuav ua haujlwm raws li lub thawv:
• rau tshuaj zawv plaub hau
• Cov khoom siv hauv tsev yuav tsum tau siv nrog kev saib xyuas
• ntxuav
• cav roj
Nws kuj yog siv los tsim lub raj mis tshuaj.
Tsis tas li ntawd, peb pom tias cov fwj tsim hauv polypropylene tseem muaj zog dua hauv lawv cov khoom khaws cia thaum lawv muaj xim lossis xim xim.
HDPE rau kev tsim kho kev lag luam thiab kev coj ua ntawm cov kua dej
Thaum kawg, ib qho ntawm lwm qhov chaw uas siv HDPE loj heev yog thaj chaw ntawm cov kav dej thiab kev tsim kho feem ntau.
Cov neeg ua haujlwm huv huv lossis kev tsim kho siv nws los tsim thiab nruab cov kav dej uas yuav siv los ua cov kua dej (dej, roj).
Txij li thaum xyoo 1950, HDPE yeeb nkab tau hloov cov kav hlau lead. Cov kav dej txhuas tau maj mam txwv vim nws cov tshuaj lom rau cov dej haus.
High-density polyethylene (HDPE) yeeb nkab, ntawm qhov tod tes, yog cov yeeb nkab uas ua rau nws muaj peev xwm ua kom muaj kev faib cov dej haus: nws yog ib qho ntawm cov kav dej siv ntau tshaj plaws rau cov dej haus no.
HDPE muaj qhov zoo ntawm kev tiv thaiv dej kub hloov pauv hauv cov yeeb nkab, tsis zoo li LDPE (tsis tshua muaj siab polyethylene). Txhawm rau faib dej kub ntawm ntau tshaj 60 °, peb yuav hloov mus rau PERT kav dej (polyethylene tiv taus kub).
HDPE kuj tseem ua rau nws tuaj yeem thauj cov roj los ntawm lub raj, tsim cov ducts lossis cov cua nkag hauv lub tsev.
Qhov zoo thiab qhov tsis zoo ntawm kev siv HDPE ntawm cov chaw ua haujlwm
Vim li cas HDPE thiaj li yooj yim siv rau ntawm qhov chaw piping? Thiab ntawm qhov tsis sib xws, dab tsi yuav yog nws cov ntsiab lus tsis zoo?
Qhov zoo ntawm HDPE ua cov khoom siv
HDPE yog cov khoom siv uas muaj ntau yam khoom zoo uas ua rau nws siv hauv kev lag luam lossis kev coj ua ntawm cov dej hauv cov kav dej.
HDPE yog cov khoom siv pheej yig rau cov qauv zoo. Nws yog qhov tshwj xeeb heev (tsis tawg) thaum lub teeb tseem nyob.
Nws tuaj yeem tiv taus qhov kub thiab txias sib txawv nyob ntawm nws cov txheej txheem tsim khoom (qhov kub qis thiab siab: los ntawm -30 ° C txog + 100 ° C) thiab thaum kawg nws tiv taus rau feem ntau ntawm cov kuab tshuaj acids uas nws yuav muaj yam tsis muaj kev puas tsuaj. sag los yog transform.
Cia peb qhia qee qhov ntawm nws qhov zoo:
HDPE: cov khoom siv tau yooj yim
Ua tsaug rau cov txheej txheem tsim khoom uas tsim HDPE, HDPE tiv taus kub heev.
Thaum lub sij hawm tsim cov txheej txheem, thaum nws ncav cuag lub melting point, cov khoom yuav ces coj mus rau ib tug tshwj xeeb zoo thiab hloov mus rau cov kev xav tau ntawm manufacturers: seb puas yuav tsim lub raj mis rau cov khoom hauv tsev los yog muab cov kav dej uas yuav tiv taus kub heev.
Qhov no yog vim li cas PE kav dej tiv taus corrosion thiab ruaj khov tiv thaiv ntau yam tshuaj lom neeg.
HDPE tiv taus thiab tsis muaj dej
Lwm qhov zoo dua thiab tsis yog qhov tsawg tshaj plaws, HDPE tiv taus heev!
• HDPE tiv thaiv corrosion: yog li cov kav dej uas thauj cov dej hnyav yuav tsis raug "corrosion". Yuav tsis muaj kev hloov pauv hauv cov yeeb nkab thickness lossis cov khoom fittings zoo li lub sijhawm.
• Kev tiv thaiv rau cov av txhoj puab heev: tib yam, yog tias cov av yog cov kua qaub thiab cov kav dej raug faus, nws cov duab tsis zoo li yuav raug hloov kho.
• HDPE kuj tseem tiv taus cov kev cuam tshuam sab nraud uas tuaj yeem tshwm sim: lub zog xa tawm thaum lub sijhawm poob siab yuav ua rau lub cev deformation ntawm qhov tsis zoo li nws qhov kev puas tsuaj. Ib yam li ntawd, kev pheej hmoo ntawm dej rauj yog txo qis nrog HDPE
HDPE kav dej yog impermeable: seb dej los yog cua thiab. Nws yog NF EN 1610 tus qauv uas tso cai rau piv txwv los ntsuas qhov nruj ntawm lub raj.
Thaum kawg, thaum xim dub, HDPE tuaj yeem tiv taus UV
HDPE yog lub teeb tab sis muaj zog
Rau cov kav dej hauv chaw ua haujlwm, lub teeb ci ntawm HDPE yog qhov zoo dua tsis tuaj yeem: HDPE kav yog yooj yim rau kev thauj mus los, txav los yog khaws cia.
Piv txwv li, Polypropylene, ib meter ntawm cov yeeb nkab nrog ib txoj kab uas hla tsawg dua 300 hnyav:
• 5 kg hauv HDPE
• 66 kg hauv cam khwb cia hlau
• 150 kg pob zeb
Qhov tseeb, rau kev tuav feem ntau, kev teeb tsa ntawm HDPE kav yog yooj yim thiab yuav tsum tau siv cov khoom sib zog.
Cov yeeb nkab HDPE kuj tseem tiv taus, vim tias nws kav ntev heev txij li nws lub neej ntev ntev (tshwj xeeb HDPE 100).
Lub neej ntev ntawm cov yeeb nkab no yuav nyob ntawm ntau yam: qhov loj, qhov siab sab hauv lossis qhov kub ntawm cov kua dej hauv. Peb tab tom tham txog 50 txog 100 xyoo ntawm kev ua neej ntev.
Qhov tsis zoo ntawm kev siv lub siab ntom ntom polyethylene ntawm qhov chaw tsim kho
Ntawm qhov tsis sib xws, qhov tsis zoo ntawm kev siv cov yeeb nkab HDPE kuj muaj.
Peb tuaj yeem hais piv txwv:
• Cov txheej txheem kev teeb tsa thaum lub sij hawm tsim kho yuav tsum tau ua tib zoo: kev tuav rawv yuav ua rau tuag taus
• Nws tsis tuaj yeem siv gluing lossis screwing los txuas ob lub kav dej HDPE
• muaj kev pheej hmoo ntawm ovalization ntawm cov kav dej thaum koom nrog ob lub kav dej
• HDPE absorbs suab ntau dua li lwm cov ntaub ntawv (xws li cam khwb cia hlau), uas yog qhov nyuaj dua los kuaj xyuas
• thiab yog li saib xyuas cov dej xau. Cov txheej txheem kim heev yog siv los saib xyuas lub network (txoj kev hydrophone)
• thermal expansion yog ib qho tseem ceeb nrog HDPE: cov yeeb nkab yuav deform nyob ntawm qhov kub thiab txias
• Nws yog ib qho tseem ceeb uas yuav tsum tau hwm qhov siab tshaj plaws ua haujlwm kub raws li qhov zoo ntawm HDPE
Post lub sij hawm: Sep-11-2022