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paper and cardboard products that have been used; also the paper waste products of printing shops, mills producing office paper supplies, and the like. Wastepaper is used at paper mills as a secondary raw material.

After preliminary cleaning, the wastepaper supplied to paper and cardboard mills is made into fibrous pulp (slurry). The pulp is then cleaned, concentrated, and sent to a cardboard or paper machine.

The recycling of wastepaper is very important for the economy: wood is saved and the cost of the finished product is lowered. Wastepaper is 1.5-2.5 times less expensive than conventional wood pulp. One ton of utilized wastepaper saves approximately 4 cu m of wood. The wastepaper reclaimed in some countries (such as the Netherlands, Japan, and the Federal Republic of Germany) accounts for 50 percent of the total quantity of required paper production.


References in periodicals archive ?
However, ferrous scrap metal and wastepaper represent the bulk of the industry's output.
Wastepaper processors collect various types of used paper products such as newspapers, business and computer paper, and corrugated boxes.
About one-third of the approximately 600 paper and pulp mills in the United States use processed wastepaper products as their primary feedstock.
During the 1977-87 period, corrugated scrap annually accounted for between two-fifths and one-half of total wastepaper output; newspaper and mixed grade waste each accounted for about one-sixth; and high grade de-inked and pulp substitutes, such as brown paper bags and computer and ledger paper, for one-fifth.
Because there is some substitution between woodpulp and wastepaper, yearly demand for wastepaper does not always exactly match the output of paper products.
Many countries rely heavily on imported wastepaper as a basic feedstock for paper manufacturing because they dc) not have large domestic supplies of woodpulp or the prices of U.
Like scrap processing, wastepaper processing is highly regional, mainly because of transportation costs.
Weather also is important in wastepaper processing.
In 1976, for example, estimates show that the 100 largest wastepaper dealers accounted for about one-half of total wastepaper processed.
Unlike scrap processors, the configuration of wastepaper establishments remained fairly constant during the 1977-87 period.
The largest factor likely to affect wastepaper processing in the future is the growth of municipal recycling efforts.