PE tso tawm zaj duab xis crystalline khoom muaj qhov nqus dej tsawg thiab tsis tas yuav qhuav tag. Nws muaj zoo flowability thiab yog rhiab heev rau siab. Thaum tsim, nws raug nquahu kom siv cov tshuaj tua kab mob siab, nrog rau cov khoom siv kub thiab txias, ua kom nrawm nrawm, thiab ruaj khov txaus. Nws tsis pom zoo kom siv lub qhov rooj ncaj qha los tiv thaiv qhov tsis sib xws thiab kev ntxhov siab sab hauv. Ua tib zoo xaiv lub rooj vag txoj hauj lwm los tiv thaiv shrinkage thiab deformation;
Lub shrinkage ntau thiab shrinkage tus nqi yog loj, nrog pom tseeb directionality thiab yooj yim deformation thiab warping. Cov cua txias ceev yuav tsum qeeb, thiab cov pwm yuav tsum tau nruab nrog cov khoom txias hauv hnab ris thiab lub tshuab ua kom txias; Lub sij hawm cua sov yuav tsum tsis txhob ntev dhau, txwv tsis pub decomposition thiab hlawv yuav tshwm sim; Thaum cov khoom yas muag muag muaj qhov ntiav sab, lawv tuaj yeem raug yuam kom demolded; Melt rupture yuav tshwm sim thiab yuav tsum tsis txhob tuaj rau hauv kev sib cuag nrog cov kuab tshuaj organic los tiv thaiv kev tawg.
Polyethylene yog cov khoom lag luam tseem ceeb tshaj plaws ntawm ethylene, suav txog 70% ntawm lub ntiaj teb kev siv polyolefin, 44% ntawm tag nrho cov thermoplastic noj, thiab 52% ntawm lub ntiaj teb cov khoom siv ethylene.
Polyethylene tau muab faib ua peb pawg, xws li high-pressure low-density polyethylene (LDPE), high-density polyethylene (HDPE), thiab linear low-density polyethylene (LLDPE). Nyias zaj duab xis yog nws cov khoom tseem ceeb, ua raws li cov thawv hollow xws li nplooj ntawv thiab txheej, lub raj mis, cov kaus poom, cov thoob, thiab ntau yam kev txhaj tshuaj thiab tshuab molded cov khoom, rwb thaiv tsev thiab sheathing ntawm cov kav dej thiab cov xov hlau, cables, thiab lwm yam. Feem ntau siv hauv ntim, kev ua liaj ua teb, thiab kev thauj mus los.