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Date Added: 13 January 2008 Last updated: 14 January 2008
This Fact Sheet has been viewed: 2339 times.

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General Information   Forming is the process by which a suspension of fibres in water is laid onto a wire mesh from which the water drains through leaving a mat of fibres which form the paper sheet. This can be a continuous process or, as in handmade paper, individual sheets. The first continuous paper machines used the Fourdrinier process, whereby the fibre suspension (the dilute stock) is supplied onto the wire through a narrow slot called the slice. Under the wire at this stage is a board called the Forming Board. This controls the initial rate of dewatering to allow a more random orientation of the fibres before they become fixed in the sheet. On the paper machine the whole unit is referred to as the Forming Table. Multi-ply machines for making boards have Formers, one for each layer or ply as they are called. The principal is the same as the Fourdrinier concept except that each layer has its own former and wire maintaining the integrity of the layer. Forming takes place at the Wet End of the machine. The wire mesh is a continuous loop which is also called the Forming Fabric. As the fibre mat travels along the wire de-watering takes place using devices called table rolls and foils which are underneath the wire. Further along the wire there are vacuum boxes which continue to dewater the sheet before it separates from the wire and enters the Press Section.

What else should I look at?... An Introduction to Forming was also mentioned in the following Fact Sheets (38): An Introduction to Forming :: Forming Table :: Forming fabrics :: Dewatering on the Forming Table :: An Introduction to Dry End :: An Introduction to Engineering :: An Introduction to Environment :: An Introduction to Safety :: An Introduction to Finishing :: An Introduction to Coating :: An Introduction to Pulping :: An Introduction to Wet End Chemistry :: An Introduction to Pressing :: An Introduction to Drying :: An Introduction to Monitoring :: An Introduction to Engineering :: An Introduction to Auxillary Items :: An Introduction to Power And Energy :: An Introduction to Information Systems :: An Introduction to Surface Treatment :: An Introduction to Supply Chain Management :: An Introduction to Supply Chain Management :: Headbox / Formers :: Retention Aids :: Heat Transfer :: Machinery Safety :: An Introduction to Fibres :: Foils :: Jet to Wire Ratio & Efflux Ratio :: Vacuum Systems :: Sheet Transfer :: Press Rolls :: Refining :: Hydraulic Headboxes/Formers :: Cylinders :: Plain Press :: Retention/Dewatering Aids :: Drainage Aids ::

Suppliers of content relevant to An Introduction to Forming These 0 companies are suppliers of relevant equipment/services. (This information is from suppliers listed in the Industry Directory. Contact PITA to have your company listed here) There are 2 other potential suppliers of relevant equipment/services. (This information is from suppliers listed in the Industry Directory Contact PITA to have your company listed here) Tamfelt Corp. :: :: Finland Albany International Ltd :: Lancashire :: United Kingdom