Kemira Oyj

Clayton Campbell

Marko Kolari

Yuping Luo

Chen Lu

Jenna Rabideau

Henry Skoog

Jaakko Ekman

Junhua Chen

Zheng Dang

Yong Zou

Jukka-Pekka Raunio

Mikko Makinen

James Atkinson

Arkadiusz Zaniewski

Mikko MÄKINEN

Jenna Sue Rabideau

Methods for making paper with improved strength and methods for improving paper strength, using a metal chelate and an organic polymer, and improved strength paper made through these processes.

Paper strength improvement using metal chelates and synthetic cationic polymers

A softener composition for use in the manufacture of paper includes a softener and an acidic material, wherein the softener composition has a relative acidity (RA) value of more than 0.05.

Softener composition

The present invention provides a method for preventing or decreasing scale formation on process surfaces in manufacturing process of paper, board or the like, in which method performic acid is used as an antiscaling agent.

Method for preventing scale formation

The invention relates to a method and arrangement for detecting free fiber ends in a paper surface. The method comprises illuminating a target sample () surface, which comprises free fiber ends, from at least two directions one at the time, with at least one light source (). Original reflectance images are obtained for the target sample () surface with an imaging device (), and a surface normal is estimated for each image pixel of the original reflectance image. Thus it is possible to reconstruct a reconstructed reflectance image from the estimated surface normals, and to compare the reconstructed reflectance image and the corresponding original reflectance image and to construct a difference image, where the differences represent shadow objects of the free fiber ends in a paper surface.

Method and arrangement for detecting free fibre ends in paper

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Easton, MD, United States of America

Clayton Campbell