Tsis ntev los no, cov neeg siv khoom nug tus nqi ntawm cov hlua polypropylene, cov neeg siv khoom yog cov chaw tsim khoom ntawm cov khoom siv nuv ntses xa tawm, feem ntau yog siv cov hlua polyethylene, tab sis cov hlua polyethylene yog qhov muag heev, yooj yim rau loosen tom qab knotting, thiab qhov zoo ntawm cov hlua khi hlua khi yog qhov zoo. monofilament ntawm txoj hlua yog ntxhib, knotting tsis yooj yim rau plam.Tab sis polypropylene hnyav dua polyethylene.Raws li txoj cai, cov mis molecular ntawm propylene yog CH3CH2CH3, thiab cov mis molecular ntawm ethylene yog CH3CH3.Polypropylene muaj ib cov pa roj carbon ntau dua polyethylene, yog li cov hlua polypropylene hnyav dua li polyethylene.

Cov qauv ntawm polyethylene yog raws li nram no:

—(CH2-CH2-CH2-CH2)n——

Cov qauv ntawm polypropylene yog raws li nram no:

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

Nws tuaj yeem pom los ntawm cov qauv uas polypropylene muaj cov ceg saw ntau dua polyethylene.Tom qab ua ib txoj hlua, vim yog lub luag haujlwm ntawm cov ceg saw, txoj hlua ntawm polypropylene muaj qhov nruj dua li polyethylene, thiab nws tsis yooj yim rau plam.Qhov ceev ntawm polypropylene yog 0.91 thiab qhov ceev ntawm polyethylene yog 0.93, yog li polyethylene yuav tsum hnyav dua.

Polyethylene hlua yog hloov tau yooj yim, smoother thiab softer dua polypropylene.