Duct Tape

Is there any one one out there that can help me find out what the chemical construction of duct tape. I need it for a research project and i need answers please... any one who is willing to help. respond asap. it would mean alot to me. this is a research and developement paper that I have to research about the topic and then write a paper about it and then make a power point. i need suggestions on how i should do my paper and if and when i get it down if anyone will be willing to proof read it for me.