High density polyethylene cov khoom siv

【Lus Askiv lub npe】 High Density Polyethylene
[English abbreviation] HDPE
【Suav lub npe】 High ntom polyethylene
[Feem ntau hu ua] low pressure ethylene
【Composition monomer】 Ethylene
[Cov yam ntxwv tseem ceeb] High-density polyethylene yog cov khoom siv opaque dawb waxy nrog ib lub ntiajteb txawj nqus sib dua li dej, nrog rau ib qho kev nqus ntawm 0.941 ~ 0.960. Nws yog mos thiab tawv, tab sis me ntsis nyuab dua LDPE thiab me ntsis stretchable. Nws yog non-toxic thiab tasteless.
[Combustion Characteristics] Nws yog nplaim taws thiab tuaj yeem hlawv txuas ntxiv tom qab tawm hauv hluav taws. Sab saum toj kawg ntawm nplaim taws yog daj thiab lub hauv qab kawg yog xiav. Nws yuav yaj thaum hlawv, nrog cov kua dej ntws thiab tsis muaj pa taws dub tawm. Nyob rau tib lub sijhawm, nws emits tus ntxhiab tsw ntawm hlawv paraffin.
[Qhov zoo tseem ceeb] Resistant rau acids thiab alkalis, organic solvents, zoo heev hluav taws xob rwb thaiv tsev, thiab tseem muaj peev xwm tuav ib tug tej degree ntawm toughness ntawm tsawg kub. Qhov saum npoo hardness, tensile lub zog, rigidity thiab lwm yam mechanical zog yog siab dua LDPE, ze rau PP, thiab tawv dua PP, tab sis cov nto tiav tsis zoo li PP.
[Main Disadvantages] Cov khoom siv tsis zoo, tsis muaj huab cua permeability, yooj yim deform, yooj yim rau lub hnub nyoog, yooj yim los ua nkig, tsawg nkig dua PP, yooj yim rau kev ntxhov siab tawg, tsis tshua muaj deg hardness, yooj yim rau khawb. Nws yog qhov nyuaj rau luam tawm. Thaum luam ntawv, yuav tsum tau kho deg tawm, electroplating tsis pub, thiab nto yog npub.
[Daim ntawv thov] Siv rau extruding ntim zaj duab xis, hlua, woven hnab, nuv ntses nets, kav dej; kev txhaj tshuaj molding ntawm cov khoom siv niaj hnub qis qis thiab cov plhaub, cov khoom tsis-load-cov kabmob, cov thawv yas, cov thawv hloov pauv; extrusion tshuab molding ntim, hollow khoom, fwj.
[Cov Txheej Txheem Txhaum Txhaum] HDPE muaj ntau daim ntawv thov, xws li rov siv tau cov khob dej qab zib uas siv tau rov qab mus rau 5-gsl cov kaus poom, haus 1/5 ntawm HDPE hauv tsev. Cov qib txhaj tshuaj molding feem ntau muaj qhov ntsuas ntawm 5 txog 10, thiab muaj cov qib tawv thiab cov dej tsis muaj dej thiab cov qib siab fluidity nrog cov txheej txheem. Kev siv suav nrog nyias-phab ntsa ntim rau cov khoom siv hauv tsev thiab khoom noj; tawv, khoom noj khoom haus thiab cov xim pleev xim; thiab ib puag ncig kev nyuaj siab cracking tiv thaiv daim ntaub ntawv xws li me me cav roj tso tsheb hlau luam thiab 90-gal khib nyiab poom.
Lub ntsiab melting ntawm HDPE yog 142 degree thiab decomposition kub yog 300 degree; txhaj tshuaj molding kub muaj ib tug loj adjustable ntau yam. Thaum txhaj tshuaj molding, qhov kev khiav hauj lwm kub yog 180 degree -230 degree; vim nws yog olefin yas, nws tsis nqus dej thiab tsis tas yuav qhuav thaum lub sij hawm tsim khoom. Txawm li cas los xij, rau cov khoom lag luam zoo, nws tuaj yeem qhuav ntawm 60 degree rau 1 teev kom tso dej ntws tawm; polyethylene Lub yaj viscosity yog siab thiab qhov ntws ntev piv yog me me. Cov khoom uas nyias nyias yuav tsis muaj kua nplaum. Yog li ntawd, cov rooj vag thiab ntws raws yog qhov loj; cov khoom yog nquag rau hluav taws xob zoo li qub thiab qhov saum npoo yog yooj yim nqus angstroms. Lub shrinkage tus nqi yog 16‰ thiab tus nqi tshaj yog 0.05mm.