What Is Paper Pulp?
Paper pulp is a raw material used in the manufacturing of paper. This material contains man-made, mineral or vegetable fibers. The majority of paper is manufactured using pulp from wood. Paper is an important aspect in daily life and has been used for numerous years.
Paper and pulp are made from plant materials including cellulosic fibers. Synthetic materials are sometimes used to provide the finished product with special qualities. Some papers are made using wood fibers, the residue from sugar cane or bagasse, flax, rags and cotton linters.
Used paper is often recycled by blending it with virgin fibres and reforming it into paper again after being deinked and purified. Explosives and films are packaged using products made from cellulose such as cellulose esters, rayon and cellulose acetate.
The purpose of the pulping process is to remove lignin without sacrificing the strength of the fiber. The pulping process also removes any impurities and frees the fibers. This prevents any discoloration or disintegration of the paper in the future.
The Importance of Hemicellulose and Fibers
Hemicellulose is important in papermaking for the bonding of the fibers. It is similar in function and composition to cellulose. Numerous extractives including oleoresins and waxes are contained in the wood although they do not increase the strength properties. During the pulping process, these are also removed.
Any plant can be used for the fiber necessary for paper. The quality and strength of the fibers are among several factors that cause the pulping process to become complicated. The softwoods such as spruces, firs and pines provide strong and long fibers to add to the strength of the paper. This is why they are used for packaging and boxes.
Hardwoods have shorter fibers so a weaker paper is produced. Softwoods are transparent, smoother and much better for printing. Both hardwoods and softwoods are used to make paper. Sometimes the two are combined to increase the print ability and strength of the final product.