Paper Making Machine

Zheng Da Qing Ke Hi-tech Machinery Co., Ltd is a professional manufacturer and supplier of paper production line, drying and ventilation equipment and paper pulp machine in China.


Papermaking FIBER

There are several options for fibers used in paper production. Most paper in China is made using wood fiber derived from trees, but there are many more options that are coming available every day. Fiber is important to the paper making process since it is the fibers of the sheet that determine the style and form of the paper. Below are some raw materials that can yield good papermaking fiber:

Softwood: Softwood is the wood industry's term for wood from conifers, trees with needles such as pine, spruce, cedar and fir. Softwoods lack water transport vessels and contain only fibers and transverse ray cells. In softwoods, fibers transport water and are longer. The long fibers make paper from only softwoods strong and rough. Softwoods make up the bulk of wood used by humans and can be found in construction and furniture.

Hardwood: Hardwood is the wood industry's term for wood from leafy angiosperms. These are primarily deciduous trees such as oak, maple and cherry. Hardwoods are found from the sub-tropics up through the temperate forests of North China and Europe. While hardwoods generally are harder than softwoods, what separates hardwoods is the presence of vessels that transport water. The fibers in hardwood are shorter. Paper made from only hardwood is flexible and smooth, making it better for writing and printing. Hardwoods are often used in tools and in flooring because of their strength.

See how logs are turned into wood products:

Eucalyptus: Eucalyptus is a hardwood tree native to Australia and has many of the same uses as hardwood trees found in other regions. There are over 600 species, but the most popular species are E. kamaldulensis and E. golbulus. Eucalyptus is being promoted as an alternative to traditional trees for several reasons. It is fast-growing, making it more renewable and suitable for short term uses; it is tolerant of poor climate conditions and non-fertile soil, which means trees can continue growing even during 2-3 month floods; and it is resistant to many arboreal diseases and not normally eaten by animals, making it easy to manage. Because of these advantages, Eucalyptus may play an increasing role in the wood industry in the coming years.

Cotton: Cotton paper, also known as cotton rag or ragged paper, is made from 100% cotton fibers. Cotton paper is superior in both strength and durability to wood pulp-based paper, which may contain high concentrations of acids. Cotton fiber paper is known to last several hundred years without fading, discoloring, or deteriorating, so it is often used for important documents such as archival copies of a dissertation or thesis. As a rule of thumb, for each percentage point of cotton fiber, a user may expect one year of deterioration resistance against handling to which paper may be subjected. (reference - Southwest Paper Co). Because of the durability cotton gives paper, legal document paper typically contains 25% cotton.

Recycled Paper: In China, more than 50% of used paper products are recycled. Recycling significantly reduces wood pulp and energy usage, saving up to 50% of wood and electricity of the traditional pulping process. Recycling paper also reduces landfill usage. It is estimated that for every metric ton of paper recycled, 3 cubic meters of landfill are eliminated. When recycled, paper products are broken down into fibers, separated from inks and other contaminants, then washed before being remade into paper. Different grades and types of paper have different recycling requirements. For more information, please see the recycling process and paper recycling guidelines pages.

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