1. Cov yam ntxwv sib txawv
Cov yam ntxwv PE: Polyethylene yog cov khoom siv dawb waxy translucent, mos thiab yoog raws, sib dua li dej, tsis muaj tshuaj lom, thiab muaj cov khoom zoo dielectric. Nws yog flammable thiab txuas ntxiv hlawv tom qab tawm hauv hluav taws. Tsawg permeability, tab sis siab permeability rau cov organic vapors.
Lub pob tshab ntawm polyethylene txo qis nrog kev nce ntawm crystallinity, thiab nce nrog qhov nce ntawm molecular hnyav ntawm ib qho crystallinity. HDPE muaj qhov melting point ntau ntawm 132-135 degree, thiab tsawg ntom polyethylene muaj qis melting point (112 degree) thiab ntau yam.
HDPE yam ntxwv: HDPE yog cov khoom siv opaque dawb zoo li cov khoom siv nrog lub teeb tshwj xeeb, 0.941-0.960. Nws yog ob qho tib si tawv thiab mos, tab sis me ntsis nyuaj dua LDP. Nws kuj yog me ntsis elongated, tsis muaj tshuaj lom thiab tsw ntxhiab.
2. Cov khoom siv tshuaj sib txawv
PE tshuaj muaj zog: polyethylene muaj tshuaj lom neeg ruaj khov. Nyob rau hauv ib txwm kub, nws muaj peev xwm tiv taus corrosion ntawm cov tshuaj xws li hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, amine, sodium hydroxide, potassium hydroxide, thiab lwm yam. Nitric acid thiab sulfuric acid muaj zog puas tsuaj rau polyethylene.
HDPE tshuaj muaj zog: flammable, tuaj yeem hlawv tom qab hluav taws. Sab saum toj ntawm nplaim taws yog daj thiab hauv qab yog xiav. Thaum hlawv, nws melts. Yuav muaj cov tee dej, tsis muaj pa taws dub. Nyob rau tib lub sijhawm, qhov tsis hnov tsw ntawm hlawv paraffin kuj yuav raug tso tawm.
