I-roll-roofing yokuphathwa kwepolyethylene polypropylene yilokhu okukhethwa kwepolypropylene non-woven fabric, polyethylene njengomkhumbi wokuvuna oluhamba ngaphambili ngokusebenzisa isitshalo sokuhlukaniswa, ngokusebenzisa umphakathi wezobuchwepheshe, itekhnoloji entsha, itekhnoloji entsha yokuhlukaniswa kwezobuchwepheshe yezithunzi eziningi njengomuntu wokuhlukaniswa kwezobuchwepheshe zezopolimera zepolyethylene polypropylene.