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Language: English Polish Portuguese Russian
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General Papermaking Series (Details)Includes 6 courses for $299/year. Paper Library (Details)Includes 95 courses for $1,499/year.
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Training Time: 21 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Portuguese, Polish, Russian
This module begins with a brief history of papermaking and a discussion on the types of fibers used in the production of paper products. Then, it discusses the various mechanical, chemical, and semichemical pulping processes used to separate the fibers in wood. It describes several pulp processing operations, including bleaching, and ends with a description of the various sections of a paper machine, including the forming section, press section, dryer section, and reel.
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The following key questions are answered in this module:
How are softwood and hardwood fibers different from each other?Softwood fibers tend to be long and flexible, which contributes to the strength characteristics of paper. Hardwood fibers tend to be short and stiff, which contributes to the bulk, smoothness, and opacity of paper.
Why is paper that is made from mechanical pulp called "wood-containing paper"?Mechanical pulps contain all of the constituents of wood, including the lignin, and so they are referred to as "wood-containing."
What is the "liquor" that is used in chemical pulping processes?"Liquor" is the name of the water-based chemical solution that is used to cook wood chips in chemical pulping processes.
What happens to the chemicals in the cooking liquor after the pulping process?The chemicals are washed out of the pulp and then they are recovered so that they can be reused.
Pulping and papermaking processes require a lot of steam heat. Where does this steam come from?As part of the chemical recovery process, many organic compounds from the wood are burned to produce steam.
Below is a transcript of the video sample provided for this module:
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