Yahoo Web Search

Search results

1. People also ask

   What is paper pulp?

   • Paper pulp, raw material for paper manufacture that contains vegetable, mineral, or man-made fibers. It forms a matted or felted sheet on a screen when moisture is removed. Except for certain special papers (such as asbestos paper), nearly all papers are made of cellulosic (vegetable) fibers.

   Paper pulp | Definition & Facts | Britannica

   www.britannica.com/technology/paper-pulp

   See all results for this question

   What is a chemical pulp?

   • Chemical pulp is used for materials that need to be stronger or combined with mechanical pulps to give a product different characteristics. The kraft process is the dominant chemical pulping method, with the sulfite process second. Historically soda pulping was the first successful chemical pulping method.

   Pulp (paper) - Wikipedia

   en.wikipedia.org/wiki/Pulp_(paper)

   See all results for this question

   What is semichemical pulp used for?

   • It is used for specialty papers, for rayon and cellulose film production, and for cellulose derivatives, such as nitrate and acetate. Semichemical pulp is made by treating wood chips with sulfite or alkali in amounts and under conditions that soften the lignin but dissolve only part of it. The softened chips are then defibred.

   Papermaking - Pulping, Refining, Bleaching | Britannica

   www.britannica.com/technology/papermaking/Processes-for-preparing-pulp

   See all results for this question

   How is pulp made?

   • In general, there are two ways to make pulp, the primary component of paper: chemical pulping or mechanical pulping. More than 90% of the pulp manufactured is made from wood, which is the primary fibrous raw material utilized in this process. Non-wood fibers have a significant role as a source of raw materials, particularly in developing nations.

   Paper and Pulp: Introduction, Raw materials, Stages, And Flow Sheet

   chemistnotes.com/inorganic/paper-and-pulp-introduction/

   See all results for this question

   How does chemical pulping work?

   • Chemical pulping achieves this by degrading the lignin and hemicellulose into small, water-soluble molecules which can be washed away from the cellulose fibres without depolymerizing the cellulose fibres (chemically depolymerizing the cellulose weakens the fibres).

   Pulp (paper) - Wikipedia

   en.wikipedia.org/wiki/Pulp_(paper)

   See all results for this question

   What is recycled pulp?

   • Recycled pulp is also called deinked pulp (DIP). DIP is recycled paper which has been processed by chemicals, thus removing printing inks and other unwanted elements and freed the paper fibres. The process is called deinking. DIP is used as raw material in papermaking.

   Pulp (paper) - Wikipedia

   en.wikipedia.org/wiki/Pulp_(paper)

   See all results for this question

2. en.wikipedia.org › wiki › Pulp_(paper)Pulp (paper) - Wikipedia

   en.wikipedia.org › wiki › Pulp_(paper)

   • Cached

   Pulp is a fibrous lignocellulosic material prepared by chemically, semi-chemically or mechanically producing cellulosic fibers from wood, fiber crops, waste paper, or rags. Mixed with water and other chemicals or plant-based additives, pulp is the major raw material used in papermaking and the industrial production of other paper products. [1][2]

3. chemistnotes.com › inorganic › paper-and-pulpPaper and Pulp: Introduction, Raw materials ... - Chemistry Notes

   chemistnotes.com › inorganic › paper-and-pulp

   • Cached

   Aug 12, 2023 · Paper and Pulp, often known as pulp, are fibrous substances that are the main raw materials for the production of paper, manufactured from plant fiber using various pulp processing techniques. Cellulose, hemicellulose, lignin, pigment, resin, pectin, and ash are a few of the main components of pulp.

4. Videos

   • 

     7:45

     youtube.com

     Pulp manufacturing process || Chemical Pedia

     23 May 2019

     101.5K views

   • 

     8:51

     youtube.com

     part 1| introduction to pulp, fibers and pulping process used in pulp and paper production

     12 Aug 2020

     5.8K views

   • 

     11:58

     youtube.com

     Manufacturing process of Pulp with a flowsheet diagram | Chemical engineering

     4 Aug 2023

     1.4K views

   View all

5. www.chemistryworld.com › features › the-complexThe complex chemistry of making paper

   www.chemistryworld.com › features › the-complex

   At a chemical level, paper is made of cellulose fibres pressed and bound together by hydrogen bonds, but it’s the crucial pulping step that accounts for paper’s unusual strength. As the wood ...

6. www.bbc.co.uk › bitesize › guidesPapers and boards - AQA Sources and origins - BBC

   www.bbc.co.uk › bitesize › guides

   Wood pulp. wood pulp Wood fibres processed and reduced down with chemicals or mechanically broken down into smaller parts to make paper. is obtained by cutting down trees and breaking down...

7. www.britannica.com › technology › paper-pulpPaper pulp | Definition & Facts | Britannica

   www.britannica.com › technology › paper-pulp

   • Cached

   Paper pulp, raw material for paper manufacture that contains vegetable, mineral, or man-made fibers. It forms a matted or felted sheet on a screen when moisture is removed. Except for certain special papers (such as asbestos paper), nearly all papers are made of cellulosic (vegetable) fibers.

   • Author: The Editors of Encyclopaedia Britannica

8. www.pgpaper.com › what-is-pulpWhat is Pulp? - PG Paper

   www.pgpaper.com › what-is-pulp

   • Cached

   Oct 9, 2024 · Chemical Pulping: Produced by using chemical processes to break down lignin – the glue holding wood fibres together. This results in stronger and higher-quality pulp, often used for printing paper, packaging , and specialty products.

9. www.britannica.com › Processes-for-preparing-pulpPapermaking - Pulping, Refining, Bleaching | Britannica

   www.britannica.com › Processes-for-preparing-pulp

   • Cached

   Chemical wood pulp that is purified both by bleaching and by alkaline extraction is called alpha or dissolving pulp. It is used for specialty papers, for rayon and cellulose film production, and for cellulose derivatives, such as nitrate and acetate.