Qhov sib txawv ntawm txoj hlua polyethylene thiab polypropylene hlua

Tsis ntev los no, ib tus neeg siv khoom nug txog tus nqi ntawm PP danline hlua.Cov neeg siv khoom yog cov chaw tsim khoom lag luam uas xa tawm cov nuv ntses.Feem ntau, lawv siv txoj hlua polyethylene.Tab sis txoj hlua polyethylene yog du thiab zoo thiab yooj yim rau xoob tom qab knotting.Qhov zoo ntawm PP danline hlua yog nws cov qauv fiber ntau.Cov fiber ntau yog ntxhib thiab cov pob caus tsis yog nplua.

Raws li txoj cai, cov mis molecular ntawm propylene yog: CH3CH2CH3, thiab cov mis molecular ntawm ethylene yog: CH3CH3.

Cov qauv ntawm polypropylene yog raws li nram no:

— (CH2-CH (CH3) -CH2-CH (CH3) -CH2-CH (CH3)) n —-

Cov qauv ntawm polyethylene yog raws li nram no:

— (CH2-CH2-CH2-CH2) n ——

Nws tuaj yeem pom los ntawm cov qauv uas polypropylene muaj ib ceg saw ntau dua li polyethylene.Tom qab txoj hlua tau tsim, vim yog lub luag haujlwm ntawm cov ceg saw, cov hlua polypropylene muaj lub zog tensile zog dua li polyethylene thiab cov pob caus tsis slippery.

Polyethylene hlua yog yoog raws thiab du dua li polypropylene, thiab zoo li softer.

Qhov ceev ntawm polypropylene yog 0.91, thiab qhov ceev ntawm polyethylene yog 0.93.Yog li PE hlua hnyav dua PP hlua.