Kwanan nan, abokin ciniki ya tambayi farashin polypropylene igiya, abokin ciniki shine masana'anta na fitar da net ɗin kamun kifi, yawanci ana amfani da igiya polyethylene, amma igiya polyethylene ya fi laushi, sauƙin sassauta bayan igiya, kuma fa'idar igiya mai lebur shine cewa monofilament na igiya ne m, knotting ba sauki zamewa.Amma polypropylene ya fi polyethylene nauyi.A ka'ida, tsarin kwayoyin propylene shine CH3CH2CH3, kuma tsarin kwayoyin ethylene shine CH3CH3.Polypropylene yana da carbon atom guda ɗaya fiye da polyethylene, don haka yawan igiya polypropylene ya fi polyethylene nauyi.

Tsarin polyethylene shine kamar haka:

—(CH2-CH2-CH2-CH2)n—-

Tsarin polypropylene shine kamar haka:

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

Ana iya gani daga tsarin cewa polypropylene yana da sarkar reshe fiye da polyethylene.Bayan yin igiya, saboda rawar da sassan reshe ke yi, igiya na polypropylene yana da ƙarfi fiye da polyethylene, kuma ba shi da sauƙi don zamewa.Yawan polypropylene shine 0.91 kuma yawan polyethylene shine 0.93, don haka polyethylene yakamata ya zama nauyi.

Igiyar polyethylene ya fi sassauƙa, santsi da laushi fiye da polypropylene.