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Web smoothness improvement process

A web, smoothness technology, applied in pulp beating/refining method, papermaking, paper machine, etc., can solve problems such as smoothing and economical method, degradation of strength characteristics, not providing fiber web surface, etc., reaching unit Small loss in weight and thickness, improved smoothness, and improved hardness

Inactive Publication Date: 2008-10-01
INT PAPER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] None of the prior art methods provide a simple and economical method of smoothing the surface of a fibrous web
Furthermore, the strength properties of the paper degrade significantly during the use of known methods

Method used

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Examples

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Embodiment Construction

[0025] In the paper industry, rolls are used for different purposes, such as conveying webs, coating and rolling, etc. The present invention is based on the surprising discovery that a smooth roll can be used to generate heat and thus considerably improve the smoothness of the web / board, which was previously thought to require an abrasive cover roll Completed. In particular, the present invention provides a method of improving the smoothness of the web surface by subjecting the web surface to an uncovered smooth roller moving at a different speed from the web, thereby due to The heat generated by the friction plasticizes the uppermost fibers on the paper. Surprisingly, the inventors have discovered that it is not necessary to add any abrasives to the steel rolls to generate the heat required to increase the smoothness.

[0026] The terms "paper / board", "paper" and "board" refer to products formed from sheets containing cellulosic or woody fibers. "Paperboard" is synonymous ...

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Abstract

The present invention provides a process for improving smoothness of a web surface by subjecting the web surface to an untreated smooth roll traveling at a different speed than the web and thereby producing heat generated by friction to plasticize the very top fibers in the mat. Surprisingly, the inventors found that no abrasive was needed to generate the amount of heat required to achieve the smoothness gain.

Description

technical field [0001] The present invention relates to a method for improving the smoothness of the surface of a fibrous web without compromising other properties such as thickness per weight, density, yield and quality. More particularly, the present invention relates to a method in which a web / board web is passed over a smooth, untreated roll in such a frictional manner that sufficient heat is generated to render the surface The fibers are plasticized or melted. Background technique [0002] For all printing jobs, the surface of the paper web / board should be as smooth and / or uniform as possible. A typical method of improving the smoothness of the web / board surface before coating, as the last finishing step after coating the web / board substrate, or for uncoated web / board, involves extrusion. Press cardboard. This is called rolling. During the rolling process, the paper is subjected to a smooth finish under enormous pressure. The goal of rolling is to smooth the paper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21G1/00D21DD21D1/00D21F11/00D21H25/04
CPCD21G1/00
Inventor T·E·阿尔特曼T·I·埃里克森K·M·坎加斯
Owner INT PAPER CO
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