Overview of the Manufacturing Process for Paper and Board : Part 1

2017-01-08T00:14:26+00:00 Categories: Introduction to paper|Tags: , , , , , , |

Overview of the Manufacturing Process for Paper and Board Papermaking today includes, in principle, the same process steps as applied for centuries: preparation of the fiber material, sheet or web forming, pressing, dry¬ing, sizing and smoothing. However, in the last two centuries much of the detail has changed. Each process step has undergone – and [...]

What is Paper ?

2017-01-08T00:14:26+00:00 Categories: Paper Production|Tags: , |

Paper is defined internationally as a thin layer of mostly cellulosic plant fibers, produced on a screen by dewatering a slurry of fibers in water . The slurry is called pulp. Despite recent developments (proteinic or synthetic fibers, chemical additives, coating, etc.) the “cellulosic plant fiber” will be the main, not exclusive, component of paper, [...]

Historical Background and General Aspects

2017-01-08T00:14:26+00:00 Categories: Introduction to paper|Tags: , , , , , , |

Historical Background and General Aspects 1.3.1 Introduction Paper is defined internationally as a thin layer of mostly cellulosic plant fibers, produced on a [...]

Paper Bleaching Chemicals

2012-08-07T11:02:39+00:00 Categories: Chemical Additives|Tags: , , , , , , , , , |

When chemical pulp, mechanical pulp and deinked recycled fibers are used in the production of white papers e. g. printing and writing papers, hygiene paper (tissue) or white top of board, these pulps have to be bleached up to a certain brightness. The bleaching of chemical pulp (see Volume 1) is carried out in several [...]

Economic Aspects of Paper

2017-01-08T00:14:26+00:00 Categories: Introduction to paper|Tags: , , , , , , |

In 2002 the world production of paper and board was ca. 331 V 106 t. Although paper and board are used in some [...]

Starch

2017-01-08T00:14:26+00:00 Categories: Chemical Additives|Tags: , , , , , , , |

Starch for Paper : Products and Market Figures Starch plays a dominant role amongst chemical additives that are used for the manufacturing and upgrading of paper and board (see Fig. 3.1 and 3.2). It was used in papermaking even before the invention of handmade papers, being de¬tected in sheets of papyrus. Starch derivatives are mainly [...]

Paper Roll Handling

2017-01-08T00:14:26+00:00 Categories: Paper Finishing And Slitting|Tags: , , , , , , , , , , , |

Paper Roll Handling 8.2.1 Objective and General Description of Roll Handling The objective of roll handling is to prepare the finished paper rolls for shipment in such a way that they arrive at the end user in the best possible condition. The mill can contribute to this aim by two means, i. e. by very [...]

Requirements of Coated Papers for the Printing Process

2017-01-08T00:14:26+00:00 Categories: Coating|Tags: , , , , , , , , , |

Requirements of Coated Papers for the Printing Process Printed matters are used for advertising, news and information, transactions, edu¬cation, and entertainment. Here they are in competition with other communica¬tion media, such as radio and television, and the internet. Printing on packaging paper and board has the functions of advertising, delivering information, and showing data such [...]

Rolls in Paper and Board Machines

2017-01-08T00:14:26+00:00 Categories: Papermachine Rolls|Tags: , , , , |

Rolls in Paper and Board Machines  6.2 Rolls in Paper and Board Machines 6.2.1 General Aspects Different types of rolls are used throughout the paper or board machine as well as in off-line machines and fulfill a variety of functions: . • Guide rolls give a stable run either to the paper web or to [...]

Stock Preparation Unit Processes and Equipment

2017-01-08T00:14:26+00:00 Categories: Stock Preparation|Tags: , , , , , , , , , , |

Fiber Materials Feeding The objective of fiber material feeding is to supply a predetermined and measured amount of fiber stock to the repulping unit. The feed is either continuous or batch-wise. The fiber material is delivered to the paper mill in the form of bales (virgin pulp, recovered paper) or as loose material (recovered paper). [...]