Polyethylene cob yog cov ua kom tsis muaj tshuaj lom, tsis muaj hmoov dawb lossis granule, nrog lub ntsej muag dawb, lub ntsej muag zoo li tes ciab, thiab nqus dej kom tsawg, tsawg dua 0.01%. Cov yeeb yaj kiab polyethylene yog pob tshab thiab txo qis nrog qhov nce ntawm crystallinity. Polyethylene zaj duab xis muaj dej tsawg permeability tab sis siab huab cua permeability, uas tsis haum rau kev ntim khoom tshiab-tab sis haum rau cov dej noo-pov thawj ntim. Nws yog cov nplaim taws thiab muaj cov pa oxygen ntawm 17.4. Nws muaj pa taws qis thaum lub sijhawm sib xyaws, nrog me me ntawm molten kua, daj rau ntawm nplaim thiab xiav hauv qab, muaj tus ntxhiab tsw ntxhiab. Polyethylene muaj dej zoo dua. Qhov saum npoo ntawm cov khoom yog non-polar, thiab nws yog qhov nyuaj kom muaj kev sib khi thiab luam ntawv. Nws yog txhim kho los ntawm kev kho saum npoo. Ntau cov ceg muaj qhov tsis zoo tiv thaiv rau lub teeb degradation thiab oxidation.
Nws lub lev molecular yog nyob rau hauv thaj tsam ntawm 10,000 txog 100,000. Cov uas muaj lub cev nyhav tshaj li ntawm 100,000 yog ultra-high molecular phaus polyethylene. Qhov hnyav dua qhov phaus nyhav, qhov zoo dua ntawm cov khoom siv lub cev thiab lub tshuab thiab ze rau qhov qib uas xav tau ntawm cov ntaub ntawv engineering. Tab sis ntau dua qhov hnyav nyhav, qhov nyuaj nws kev lag luam. Cov ntsiab lus yaj ntawm polyethylene yog 100 ～ 130 ℃, thiab nws muaj qhov kub tsis tshua zoo tiv thaiv. Nws tseem tuaj yeem tswj cov cuab yeej zoo ntawm -60 ℃, tab sis kev siv kub yog 80 ~ 110 ℃.
Nws yog qhov tsis txaus ntseeg nyob rau hauv kev paub txog cov tshuaj tiv thaiv hauv chav tsev kub, thiab tuaj yeem yaj nyob rau hauv tus nqi me me hauv toluene, amyl acetate, trichlorethylene thiab lwm cov kuab tshuaj siab dua 70 ° C.