Kanemayo amapangidwa ndi kuponya, ndipo polyethylene yaiwisi yaiwisi ndi pulasitiki ndi extruded ndi njira kuponya tepi;Izi zimawonjezera zida zotanuka kwambiri pamapangidwe opanga, ndipo zimagwiritsa ntchito chodzigudubuza chokhala ndi mizere yapadera kuti filimuyo ikhale ndi mapangidwe.Pambuyo kusintha ndondomeko, filimu opangidwa ali otsika zofunika kulemera, wapamwamba zofewa dzanja kumverera, mkulu kumakoka mlingo, mkulu hydrostatic kuthamanga, elasticity mkulu, wochezeka khungu, mkulu chotchinga ntchito, mkulu seepage kukana ndi makhalidwe ena, amene angakumane ndi katundu zosiyanasiyana za magolovesi. chosalowa madzi.