Set your iron on the rayon setting (no steam). While the iron is heating, cut two sheets of parchment paper about 25" long. Lay one sheet of parchment paper on the ironing board and place your glued plastic bags on top of it. The plastic is going to be longer than the paper, but that's okay. Let the long piece lay over the side of the ironing board, now place the second sheet of parchment paper on top of the plastic. Your plastic should be sandwiched between the two sheets of parchment paper. Now, start ironing being very careful not to let the plastic come in contact with the iron. It will take about 15 seconds for the plastic to fuse. Just lift a corner of the parchment paper and check it, if it has not fused continue ironing. Once fused, you should now have one long fused piece of plastic.