Below is a list of Polypropylene Bags manufacturers from Willowbrook, Illinois. Polypropylene bags are sacks or pouches made of completely transparent, strong, rigid material that doesn't stretch but provides a good vapor and moisture barrier. Such qualities make polypropylene a popular material choice for promotional or display bagging needs as consumers can readily preview goods prior to purchase. Food packaging and retail display comprise the majority of industrial and commercial uses for these baggies.