Ana amfani da jakar roba ta abinci mafi yawa don yin fim na polyethylene, wanda ba shi da guba, don haka ana iya amfani da shi don sanya abinci. Akwai kuma wani fim da aka yi don polyvinyl chloride, polyvinyl chloride da kansa ba shi da guba, amma dangane da amfani da fim da aka ƙara sau da yawa suna da abubuwa masu cutarwa ga jikin mutum, tare da wasu guba. Saboda haka, irin wannan fim da jakar filastik da aka yi da shi ba su dace a yi amfani da su don saka abinci ba. Don gane polyvinyl chloride roba jaka da polyvinyl roba jaka, za a iya amfani da sauki hanyar da ke ƙasa don ganewa.

Polyethylene fim (ba mai guba ba)

The fina-finai ne milky fari, semi-transparent (da dama layers up duba musamman bayyane), taɓa mafi lubricating, kamar yadda wani waxed layers a kan farfajiyar, girgiza tare da ƙarfi, sauti m, mai ƙonewa a wuta, wuta rawaya, da wani sludge drops a lokacin konewa, da kuma ƙanshi lokacin da kyandiri.

Polyvinyl chloride fim (gabaɗaya guba)

Kamar rashin launi, don haskakawa, taɓa farfajiyarsa da wasu adhesive, da ƙarfi rawar jiki, sauti low, wuta ba sauki ƙona, daga wuta ya kashe, wuta ne kore.