Reinforced paper and method for making the same

摘要

A reinforced paper and method for making the paper. The method involves applying to finished paper or the areas of finished paper to be reinforced a reinforcing medium dissolved in water with a surface tension reducing agent added. The solution rapidly impregnates the paper and the water and surface tension reducing agent are subsequently evaporated. The reinforcing medium rearranges the bonding of the fibers in the paper, thus strengthening the paper. The process may be carried out at the line speeds of paper converters and, when only certain areas of the paper are reinforced, the reinforced areas have a thickness substantially the same as the unreinforced areas. A preferred reinforcing medium is an anionic acrylic copolymer.