PE: Polyethylene PE resin yog xim tsis muaj tshuaj lom thiab tsis muaj ntxhiab dawb lossis hmoov, nrog lub ntsej muag xim dawb thiab lub ntsej muag zoo nkauj; nws yog qhov kub nyhiab, nrog cov pa ntsuas tau tsuas yog 17.4%, tsis tshua muaj neeg haus luam yeeb thiab nqus dej thaum lub sijhawm zuaj, daj rau ntawm nplaim thiab xiav hauv qab.
Paraffin tsw; kev nqus dej tsawg (polyethylene)PE polyethylene PE muajib qho me me ntawm ob daim ntawv cog lus thiab cov pawg ether hauv cov qauv, vim li ntawd cov huab cua tsis kam ntawm PE tsis zoo, lub hnub thiab nag yuav ua rau kev laus, yuav tsum ntxiv cov tshuaj tua kab mob antioxidant, lub teeb stabilizers los txhim kho Lub thermal stability ntawm polyethylene PE hauv inert roj yog heev zoo, thiab qhov ua kom kub siab ua kom tiav tuaj yeem ncav cuag 300â „ƒ lossis ntau dua; tab sis thaum qhov kub tshaj 50â „ƒ hauv lub xeev rhaub, cov pa kub yuav ua rau cov tshuaj tiv thaiv tsis zoo, yog li nws yuav tsum tau ntxiv cov tshuaj tiv thaiv kab mob txhawm rau txhim kho nws. Piv txwv, lub ntsiab antioxidant 1010 thiab cov ntu tiv thaiv antioxidant 168; lub tshav kub tsis kam ntawm PE nyob hauv huab cua tsis zoo, thiab nws yuav txhim kho nrog qhov nce ntawm molecular phaus thiab crystallinity; tab sis qhov kub tsis tshua muaj kev cuam tshuam ntawm PE yog qhov zoo heev, thiab nws lub zog kub hloov qis dua qis dua -50â „ƒ, thiab nrog qhov nce ntawm molecular phaus, qis tshaj tuaj yeem ncav cuag -140â„ ƒ; lub thermal conductivity ntawm PE siab dua, HDPE> LLDPE> LDPE; cov linear expansion coefficient ntawm PE yog qhov loj, uas yog qhov loj dua ntawm cov ntau hom yas, thiab qhov ntau tshaj Mus txog (20 ~ 24) × 10 -5 -5 K--1, LDPE> LLDPE> HDPE.
1. Tsawg-ntom polyethylene LLDPE Tsawg-ntompolyethylene LLDPE: Cov roj molecular saw tsawg-ntom polyethylene muaj cov ceg ntev thiab luv thiab muaj qhov qis qis, qhov hnyav molecular feem ntau yog 50,000 txog 500,000, lub milky dawb translucent waxy solid resin, non-toxic, tsawg soft point, zoo hloov tau, cuam tshuam tsis kam, zoo tsis tshua muaj kub tsis kam, thiab tuaj yeem nyob rau ntawm -60â ƒ ƒ Ua haujlwm ntawm -80â „ƒ, rwb thaiv hluav taws xob zoo heev.
2. LDPE muaj cov khoom siv lub zog tsis zoo, tsis kam tiv tshav kub, qhov kev tiv thaiv ib puag ncig tsis zoo, kev coj ua kom yooj yim, thiab luam tawm, thiab xav tau kev kho saum npoo kom txhim kho nws cov kev ua tau zoo. LDPE Cov dej nqus qis heev, yuav luag tsis muaj dej nqus, tshuaj lom neeg ruaj khov, xws li ruaj khov rau cov kua qaub, alkalis, ntsev, thiab cov kuab tshuaj organic. Siab permeability rau cov pa roj carbon dioxide thiab cov ntxhiab tsw organic, tab sis tsis zoo permeability rau dej pa thiab cua. Yooj yim rau hlawv, Kev kub hnyiab muaj qhov tsis hnov tsw, nws yog qhov yooj yim rau thuam thiab hloov xim raws li kev ua ntawm tshav ntuj thiab kub.
3. High-ntuag polyethylene HDPE:High-ntuag polyethylene HDPE: Nws yog milky dawb translucent waxy khoom, qib ntawm branching ntawm HDPE yog qhov tsawg tshaj plaws, thiab lub zog molecular yog nruj Stacked, yog li qhov ntom ntom muaj siab, qhov ci siab yog siab. HDPE muaj qhov kub thiab txias tsis kam, roj ua hauj, chav permeability tsis kam thiab ib puag ncig kev sib tw tawg, hluav taws xob rwb thaiv tsev, cuam tshuam ua hauj thiab txias txias. HDPE nyob rau hauv lub zog thiab Cov kev ua haujlwm zoo dua li ntawm PP, thiab qhov kub ua haujlwm tau siab dua li ntawm PVC thiab LDPE. HDPE muaj dej nqus me me, tsis muaj kuab lom, zoo tshuaj lom neeg ruaj khov, thiab zaj duab xis muaj qhov dej tsis tshua muaj dej nyab thiab huab cua.
