Kev txhais ntawm HDPE
HDPE yog lub npe luv uas feem ntau siv los hais txog polyethylene uas muaj qhov ceev ceev. Peb kuj hais txog PE, LDPE lossis PE-HD phaj. Polyethylene yog cov khoom siv thermoplastic uas yog ib feem ntawm tsev neeg ntawm cov yas.
Muaj ntau hom polyethylene sib txawv. Cov kev sib txawv no piav qhia los ntawm cov txheej txheem tsim khoom uas yuav txawv. Peb tab tom tham txog polyethylene:
• qhov ceev tsawg (LDPE)
• qhov ceev siab (HDPE)
• qhov nruab nrab ceev (PEMD).
Tsis tas li ntawd xwb, tseem muaj lwm hom polyethylene: chlorinated (PE-C), nrog rau qhov hnyav molecular siab heev.
Tag nrho cov lus luv luv thiab cov hom ntaub ntawv no tau raug teeb tsa raws li tus qauv NF EN ISO 1043-1.
HDPE yog qhov tshwm sim ntawm cov txheej txheem ceev ceev: High Density Polyethylene. Nrog nws, peb tuaj yeem ua cov khoom ua si rau menyuam yaus, cov hnab yas, thiab cov kav dej siv los thauj dej!
Yas HDPE yog tsim los ntawm kev sib xyaw roj av. Rau nws txoj kev tsim khoom, HDPE muaj ntau kauj ruam sib txawv:
• kev lim dej
• kev tawg ntawm cov pa dej
• kev ua kom polymerization
• kev ua kom cov hmoov me me
Tom qab qhov kev hloov pauv no, cov khoom yog dawb mis nyuj, pob tshab. Nws ces yooj yim heev rau kev ua duab lossis xim.
Cov ntaub ntawv siv HDPE hauv kev lag luam
Ua tsaug rau nws cov yam ntxwv thiab qhov zoo, HDPE siv rau ntau qhov chaw ntawm kev lag luam.
Nws pom muaj nyob txhua qhov chaw nyob ib puag ncig peb hauv peb lub neej txhua hnub. Nov yog qee qhov piv txwv:
Kev tsim cov fwj yas thiab cov ntim yas
HDPE paub zoo hauv kev lag luam khoom noj, tshwj xeeb tshaj yog rau kev tsim cov fwj yas.
Nws yog ib lub thawv zoo heev rau kev noj mov lossis dej haus lossis rau kev ua lub hau fwj. Tsis muaj kev pheej hmoo ntawm kev tawg zoo li iav.
Tsis tas li ntawd xwb, cov yas ntim khoom HDPE muaj qhov zoo heev ntawm kev siv rov ua dua tshiab.
Tshaj li kev lag luam zaub mov, HDPE pom muaj nyob rau lwm qhov ntawm kev lag luam feem ntau:
• ua cov khoom ua si,
• cov yas tiv thaiv rau cov ntawv sau,
• cov thawv cia khoom
• hauv kev tsim cov canoes-kayaks
• kev tsim cov beacon buoys
• thiab ntau lwm tus!
HDPE hauv kev lag luam tshuaj lom neeg thiab tshuaj
Cov lag luam tshuaj lom neeg thiab tshuaj siv HDPE vim nws muaj cov khoom tiv taus tshuaj lom neeg. Lawv hais tias nws tsis muaj zog tshuaj lom neeg.
Yog li ntawd, nws yuav ua haujlwm ua lub thawv:
• rau cov tshuaj zawv plaub hau
• cov khoom siv hauv tsev uas yuav tsum tau siv nrog kev ceev faj
•ntxuav khaub ncaws
• roj cav
Nws kuj yog siv los tsim cov fwj tshuaj.
Tsis tas li ntawd xwb, peb pom tias lub raj mis uas tsim los ntawm polypropylene muaj zog dua hauv kev khaws cia cov khoom thaum lawv muaj xim lossis pigmented.
HDPE rau kev lag luam kev tsim kho thiab kev coj ua ntawm cov kua dej
Thaum kawg, ib qho ntawm lwm qhov chaw uas siv HDPE ntau heev yog thaj chaw ntawm cov kav dej thiab kev tsim kho feem ntau.
Cov kws tshaj lij kev ua kom huv lossis kev tsim kho siv nws los tsim thiab teeb tsa cov kav dej uas yuav siv los coj cov kua dej (dej, roj).
Txij li xyoo 1950, cov yeeb nkab HDPE tau hloov cov yeeb nkab txhuas. Cov yeeb nkab txhuas tau raug txwv tsis pub siv vim nws ua rau dej haus lom.
Cov yeeb nkab polyethylene siab (HDPE), ntawm qhov tod tes, yog cov yeeb nkab uas ua rau nws muaj peev xwm ua kom muaj kev faib dej haus: nws yog ib qho ntawm cov yeeb nkab siv ntau tshaj plaws rau kev ua haujlwm dej haus no.
HDPE muaj qhov zoo ntawm kev tiv taus qhov kub ntawm cov dej hauv cov yeeb nkab, tsis zoo li LDPE (polyethylene qis qis). Txhawm rau faib dej kub ntawm ntau dua 60 °, peb yuav tig mus rau PERT yeeb nkab (polyethylene tiv taus qhov kub).
HDPE kuj ua rau nws muaj peev xwm thauj roj los ntawm lub raj, los tsim cov kav dej lossis cov khoom siv cua hauv lub tsev.
Cov txiaj ntsig thiab qhov tsis zoo ntawm kev siv HDPE rau ntawm cov chaw lag luam
Vim li cas HDPE thiaj siv tau yooj yim rau ntawm cov chaw ua yeeb nkab hauv kev lag luam? Thiab ntawm qhov tsis sib xws, nws cov teeb meem dab tsi yuav yog?
Qhov zoo ntawm HDPE ua cov khoom siv
HDPE yog ib yam khoom uas muaj ntau yam zoo uas ua rau nws siv tau rau hauv kev lag luam lossis kev coj ua ntawm cov kua dej hauv cov kav dej.
HDPE yog ib yam khoom pheej yig thiab zoo heev. Nws ruaj khov heev (tsis tawg) thaum tseem sib dua.
Nws tuaj yeem tiv taus qhov kub thiab txias sib txawv nyob ntawm nws cov txheej txheem tsim khoom (kub qis thiab siab: txij li -30 ° C txog +100 ° C) thiab thaum kawg nws tiv taus feem ntau ntawm cov kua qaub uas nws muaj yam tsis muaj kev puas tsuaj. sag lossis hloov pauv.
Cia peb piav qhia txog qee qhov zoo ntawm nws:
HDPE: ib yam khoom siv yooj yim modular
Ua tsaug rau cov txheej txheem tsim khoom uas tsim HDPE, HDPE tiv taus qhov kub thiab txias heev.
Thaum lub sijhawm tsim khoom, thaum nws mus txog qhov melting point, cov khoom siv tuaj yeem ua rau muaj cov duab tshwj xeeb thiab hloov kho raws li qhov xav tau ntawm cov chaw tsim khoom: seb puas yuav tsim cov fwj rau cov khoom siv hauv tsev lossis muab cov kav dej rau dej uas yuav tiv taus qhov kub siab heev.
Qhov no yog vim li cas cov kav dej PE thiaj li tiv taus xeb thiab ruaj khov tiv taus ntau yam tshuaj lom neeg.
HDPE yog cov khoom siv uas tiv taus dej thiab tiv taus dej heev
Lwm qhov zoo dua thiab tsis yog qhov tsawg tshaj plaws, HDPE yog qhov tiv taus heev!
• HDPE tiv taus xeb: yog li cov kav dej uas thauj cov kua dej hnyav yuav tsis raug "xeb". Yuav tsis muaj kev hloov pauv ntawm cov kav dej tuab lossis qhov zoo ntawm cov khoom siv raws sijhawm.
• Tiv taus cov av uas muaj zog heev: ib yam li ntawd, yog tias cov av muaj kua qaub thiab cov kav dej raug faus, nws cov duab yuav tsis hloov pauv.
• HDPE kuj tseem tiv taus kev co sab nraud uas yuav tshwm sim tau zoo heev: lub zog xa mus thaum muaj kev co yuav ua rau qhov khoom puas tsuaj es tsis yog nws puas tsuaj. Ib yam li ntawd, qhov kev pheej hmoo ntawm dej ntaus raug txo qis nrog HDPE
Cov kav dej HDPE tsis nkag tau: txawm tias dej los yog cua los kuj nkag tau thiab. Nws yog tus qauv NF EN 1610 uas tso cai rau piv txwv li los sim qhov nruj ntawm lub raj.
Thaum kawg, thaum muaj xim dub, HDPE tuaj yeem tiv taus UV
HDPE yog lub teeb tab sis muaj zog
Rau cov chaw ua yeeb nkab hauv kev lag luam, qhov sib dua ntawm HDPE yog qhov zoo uas tsis lees paub: cov yeeb nkab HDPE yooj yim thauj, txav mus los lossis khaws cia.
Piv txwv li, Polypropylene, ib 'meter' ntawm cov yeeb nkab uas muaj txoj kab uas hla tsawg dua 300 hnyav:
• 5 kg hauv HDPE
• 66 kg hauv hlau cam khwb cia
• 150 kg pob zeb ua vaj tse
Qhov tseeb, rau kev tuav feem ntau, kev teeb tsa cov kav dej HDPE yooj yim dua thiab xav tau cov khoom siv sib dua.
Cov yeeb nkab HDPE kuj tseem tiv taus, vim nws kav ntev vim nws lub neej siv tau ntev heev (tshwj xeeb tshaj yog HDPE 100).
Lub neej ntawm cov yeeb nkab no yuav nyob ntawm ntau yam: qhov loj me, qhov siab sab hauv lossis qhov kub ntawm cov kua dej sab hauv. Peb tab tom tham txog 50 txog 100 xyoo ntawm kev ua neej ntev.
Cov kev tsis zoo ntawm kev siv cov polyethylene uas muaj ntau qhov ceev 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 li:
• cov xwm txheej ntawm kev teeb tsa thaum lub sijhawm tsim kho yuav tsum ua tib zoo saib xyuas: kev ua haujlwm tsis zoo yuav ua rau tuag taus
• nws tsis tuaj yeem siv cov kua nplaum lossis ntsia hlau los txuas ob lub kav dej HDPE
• muaj kev pheej hmoo ntawm kev ua kom cov kav dej oval thaum koom ua ke ob lub kav dej
• HDPE nqus tau suab ntau dua li lwm yam khoom siv (xws li hlau cam khwb cia), uas nyuaj dua rau kev ntes
• thiab yog li ntawd saib xyuas cov dej xau. Cov txheej txheem kim heev ces siv los saib xyuas lub network (cov txheej txheem hydrophone)
• Kev nthuav dav thermal yog qhov tseem ceeb nrog HDPE: cov yeeb nkab yuav deform nyob ntawm qhov kub thiab txias
• nws yog ib qho tseem ceeb uas yuav tsum hwm qhov kub siab tshaj plaws raws li qhov zoo ntawm HDPE
Lub sijhawm tshaj tawm: Cuaj hlis-11-2022