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Pulp – material formed after grinding and using chemicals to break apart the fibers in wood.

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Presentation on theme: "Pulp – material formed after grinding and using chemicals to break apart the fibers in wood."— Presentation transcript:

1 Pulp – material formed after grinding and using chemicals to break apart the fibers in wood.

2 1. Logs are cut and debarked. 2. Logs are sent through a series of chippers to break them into smaller fragments. 3. These small fragments are pressure cooked with chemicals in a digester (large vat) to separate fibers. 4. Wood pulp is cleaned, refined, and bleached.

3 5. Pulp is run through beaters until it is a fine slush. 6. Additives (color, texture) may be added. 7. The slush is pumped onto a large screen, the beginning of a continuous piece of paper. 8. Water is removed from the paper and purified before it is returned to the stream or river.

4 9. As excess water is drained, the crude paper is called a web. 10. The web is squeezed through rollers to insure uniform size and thickness and to remove any leftover water. 11. Paper is rolled onto parent rolls that may be 30 feet wide and weigh 25 tons. 12. Parent rolls are cut down and products (paper, envelopes, facial tissue, toilet tissue, books, and wallpaper) are packaged for shipment.


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