A method and apparatus for manufacturing a product of integrated cellulose and fibrous materials. The method includes blending cellulose particles and polymeric fibers into a cellulose and polymeric fiber blend. The blend is heated to a temperature at which the polymeric fibers begin to melt and to bond with the cellulose particles, so as to form a product of integrated cellulose and fibrous materials. An apparatus for the method includes a first conveying means, a second conveying means, a blending means and a heating means. The apparatus further include a primary shredder and a secondary shredder for shredding the cellulose material, typically recycled newsprint, prior to mixing with the polymeric fibrous material. A shredder is also described.