... kraft paper bag / brown paper bag 1.good puncture resistance 2.sealing strong 3.environmental friendly 4.non-toxic paper bag, kraft paper bag, brown paper bagMaterial: PET/NY/AL/PAPER ... also apply to building materials, chemical raw materials; Paper-plastic bag gets more and more widely used, which is ... PA, VMPET,VMCPP, ETCMid-layer: PET, VMPET, VMCPP, PAPER, AL, PA, ETCInner-layer:CPP, PE, White milk ...