Recycling, paper

The variety of tacky materials present in papermaking systems have different names for instance, the accumulated pollutants in the water recycling system are called dissolved and colloidal substances (DCS). The composition of DCS, which mainly come from pulp, filler, recycled water, and the chemicals added during the papermaking process, is very complex. 

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Papermill wastes Paper, photographic Paper pouches Paper preservative Paper processing Paper pulp Paper pulps Paper pulp slurries Paper, recycled Paper recycling mills Paper release coatings Papers Paper sizes Paper sizing Paper wastes... 

Fig. 2. Simplified process designs of paper recycling mills. HD = high density.

In 1993, nearly 36 million tons of paper were recovered in the United States, twice as much as in 1980 (54). Eor the first time, more paper was recovered in the United States than landfilled. As a result, 11 million fewer tons of paper were landfilled in the United States in 1993 than in 1987. This saved more than 69 X 10 m (90 x 10 yd ) of landfill space. In 1995, recovered paper accounted for 31.5% of the fiber used to manufacture 84.1 million metric tons of paper products (54). Annual capital spending for paper recycling projects from 1995 to the year 2000 is estimated to average 2 biUion (55). The American Eorest Paper Association (AE PA) estimates U.S. consumption of recovered paper will increase 4.9% per year through the year 2000, nearly twice the total paper industry capacity growth rate (56). Consumption of recovered paper in U.S. mills in 1997 is estimated at 35.6 million tons (57). 

Paper recycling has greatly iacreased in Canada, from one mill making recycled-content newspriat in 1989 to 60 paper recycling operations in 1995... 

Canadian consumption of recovered paper is about 4 million t/yr, much of it imported from the United States. Paper recycling continues to grow worldwide, particularly in Europe and the Pacific Rim. Worldwide use of recycled paper is expected to increase from nearly 75 million tons in 1988 to 130 million tons in 2001 (58). 

This growth will substantially increase demand for surfactants, bleaching agents, complexing agents, and other chemicals used in paper recycling... 

The initial use was as a blow moulded vessel for vegetable oil candles. However, because of its biodegradability it is of interest for applications where paper and plastics materials are used together and which can, after use, be sent into a standard paper recycling process. Instances include blister packaging (the compound is transparent up to 3 mm in thickness), envelopes with transparent windows and clothes point-of-sale packaging. 

AF PA, Paper Recycling Facts, American Forest and Paper Association, Washington, 2006. Available at http //www.afandpa.org/recycling/Rec paperrecfacts open.html. 

Recycling creates places of employment and saves the resources raw material, energy and water. Wood is a very important renewable raw material which is used in many fields of application. Also, the paper industry requires wood for the production of virgin fibres to ensure the multiple use of the construction material paper. It is necessary to upright the paper recycling loop to cover the tremendous demand of paper in Europe. 

Keywords Corrugated board, Folding boxboard, Food packaging, Mineral oil, Recovered paper, Recycling... 

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