PE: the material is relatively soft, but other high transparency, contrast cover, pull a good, easily burst opening;
PP material: material is hard, but high contrast transparency, clearer, tension is not very good, explosive;
PO: the material more brittle, transparency is not high enough, cast than the PE material, a little red, tension is not very good;
OPP: crisp, transparent, pull enough, but the most explosive, and printing the most easily discolored.
PVC material: material has both soft and hard, according to the owner required to order materials, transparency according to needs, Super transparent material, normal and frosted material, tensile, not easily tearing, not easily open seam, because between the two layers of material is made of machine with beer.