|Series||Technical note -- no. 204., Technical note (Forest Products Laboratory (U.S.)) -- no. 204.|
|Contributions||Forest Products Laboratory (U.S.)|
|The Physical Object|
|Pagination|| p. ;|
Pulp consists of wood or other lignocellulosic materials that have been broken down physically and/or chemically such that discrete fibers are liberated and can be dispersed in water and reformed into a web. There are four broad categories of pulping processes: chemical, semi-chemical, chemi-mechanical, and mechanical pulping. For pulping, non-wood fiber has advantages of wide source, low price, easy pulping, and smooth surface of paper. However, the non-wood fiber pulp has lower strength of paper, poor water filtering and papermaking by: 2. The fiber extracted from any plant can be used for paper. However, the strength and quality of fiber, and other factors complicate the pulping process. In general, the softwoods (e.g., pines, firs, and spruces) yield long and strong fibers that contribute strength to paper and they are used for boxes and packaging. Alongside the traditional aspects of pulping processes, pulp used in industry and paper pulps, this book describes all pulping processes used for paper and board manufacturing as well as waste liquor treatment, pulp bleaching and environmental aspects, while also covering pulp .
The pulp and paper industry comprises companies that use wood as raw material and produce pulp, paper, Some of the examples of high yield pulping process are mechanical process, semi chemical process, alkaline chemical process, sulfite process, etc. Physical paper machine effluent etc. This book explains about the various raw material. removed during the pulping process. The fiber from nearly any plant or tree can be used for paper. However, the strength and quality of fiber, and other factors that can complicate the pulping process, varies among tree species. In general, the softwoods (e.g., pines, firs, and spruces) yield long and strong fibers that impart strength to paper and. Pulp and Paper Pulp is the fibrous mass that results when a pulping process ruptures the bonds in the wood structure that hold the woody cells together. Pulping is done mechanically, thermomechanically, chemically, or with combinations of these treatments. Commercial processes are generally classified as mechanical, chemical, or semi-. This process was the one used in the first American mill, which was that of the Richmond Paper Co., built in at East Providence, R. I. This mill had a capacity of about 15 tons of book and newsprint per day; it was operated only about 5 years because of financial difficulties. Other variations of the sulfite process were quickly developed.
How Paper Gets Recycled. Wood is the best source of pulp for making paper, but used paper is also a rich source of pulp. Writing and printing on paper does not remove the fiber content, and fiber eventually becomes paper. Here’s How The Process Of Recycling Paper Works. Although, the bulk of paper originates from trees (55% from virgin pulp, and 38% from recycled wood-based paper – with 7% from non-tree sources), only about one ﬁ fth of all tree harvest goes. In its Second Edition, Handbook of Pulping and Papermaking is a comprehensive reference for industry and academia. The book offers a concise yet thorough introduction to the process of papermaking from the production of wood chips to the final testing and use of the paper by: The kraft process alone accounts for over 80 percent of the chemical pulp produced in the United States. The choice of pulping process is determined by the desired product, by the wood species available, and by economic considerations. Kraft Pulping Process Description1-The kraft pulping process (see Figure ) involves the File Size: KB.