Material of duct tape: PVC
character: 1) Insulating
2) Corrosion protect
3) Weather protect

4)protect duct

 Take the PVC thin film as the basic of material,imitate the spinning fiber material,presses the Sensitive gum manufacturing noodles to become by the rubber type.Have hard,bear to tore etc.characteristic,be applicable to each kind of piping,object to reinforce protection etc.Obstruct combustion,Bear to wait,antisepsis.