Dictionary Of Papermaking Terms

Here’s a chance to give your unwanted papers a second life for stationery, collage, or anything else you can imagine. If you’d like to embed flat items such as paper, fabric, or leaves into your paper, it’s easy.Dip the item into your pulp mixture to coat it with a thin layer, and then work the item into the pulp sheet right after you remove it from the vat.Parent roll structure is influenced by reeling parameters - which will be covered in a later article.

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The HMI contains a Graphic User Interface (GUI) composed of multiple screens. A roll of paper tightly wrapped around a reel spool.

A parent roll goes through additional processes or rewinding at a later stage of production. Can be generated by the torque of the primary or secondary drive.

Typically, the web runs down into the pulper when not reeling.

REEL SPOOL: A metal roll onto which the web is wound during reeling operations.

This article will discuss how to achieve proper parent reel structure, i.e.

how to make a nice tight roll that will handle being stored on the floor, run through a winder, multinip calender or off machine coater.Also a term synonymous with "parent roll" to indicate paper wound on a spool. ROLL BUILDING: The process of wrapping the web on the reel spool so that the sheet is wrapped with adequate tension and pressure to create a parent roll of uniform density.SHEET: The terms "web" and "sheet" are used interchangeably to refer to the continuous sheet of paper coming from the paper machine or parent roll.If the parent roll is too tight, the web loses part of its elasticity and unnecessary reeling defects may be generated.If the parent roll is too loose, it cannot be handled further or it does not fulfill the quality requirements for saleable paper because of too many reeling defects.As to its structure, a parent roll built on a reel spool can be divided into four concentric sections as per the graphic.The innermost two layer sections are the most important ones for the final result.SKEW: "Skew" in the reeling process refers to uneven loading or position of one side of the reel versus the other side.SLAB: Waste paper which is torn from the roll, for instance after a web break or during threading.OFFSET: A value which is added to or taken from a pre-determined setpoint.PANELVIEW: Allen Bradley's human-machine interface (HMI) which is used to control the movements and functions of the machine; typically has touchscreen or button access to machine control screens; comparable in function to a monitor in a PC-based system.

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