Opportunites
in Wet-End Chemistry
Trouble-shooting
Guide for Papermaking Wet-End Chemistry
CONTENTS
Alphabetical
List of Links: Solving Common Problems Involving Wet-End Additives
| Air
in the Stock Apparent Density (High, Low) Basis Weight Variability Breaks of the Paper Web (Dry-end, Size press, Wet-end) Brightness (High, Low, Variable) Color (Off-shade, Metamerism, Variable) Curl Problems Deposits (Inorganic, Organic, Pitch, Stickies) Dewatering (Gravity, Vacuum, Wet-press) Dirt Problems Drainage (Too fast, Too slow, Variable) Drainage Aid Programs Dust and Lint Entrained Air Fluorescent Whitening Effect (High, Low, Metamerism, Variable) Foam (Entrained air, Visible foam) Formation uniformity (Floc, Streaks) Friction (High, Low, Paper to metal, Paper to paper) Holes (Pick-outs, Slime) Metamerism (Colors, Fluorescent whitening) |
Opacity
(Filler light scattering, High, Low, Variable) Periodic Problems Pin-holes Pitch Problems Porosity (Too permeable, Not permeable enough) Retention (Low,Variable,High) Size Press Efficiency - Breaks Size Press Starch Holdout Problems Sizing (Acidic, AKD, ASA, Rosin, Self-sizing, Size reversion, Variable sizing) Slime Smoothness (High, Low) Spots in the Paper (Dirt, Flakes, Tacky substances) Stickies Strength (Low: Folding endurance, Internal bond, Stiffness, Tear, Tensile) Surface Strength Two-sidedness (Color, Composition, Smoothness) Variability (color, drainage, retention, strength) Wet Strength (Low, Repulping, Variable) Wet Web Strength |
PLEASE NOTE: The information
in this Guide is provided as a public service by Dr. Martin A. Hubbe
of the Department of Wood and Paper Science at North Carolina State University
(m_hubbe@ncsu.edu). Users of the information contained on these pages assume
complete responsibility to make sure that their practices are safe and do not
infringe upon an existing patent. There has been no attempt here to give full
safety instructions or to make note of all relevant patents governing the use
of additives. Please send corrections if you find errors or points that need
better clarification.
Information on this site is provided as a public service by Dr. Marty Hubbe of the Department of Wood and Paper Science at North Carolina State University. While the information is intended to be accurate, users of the information must accept full risk. When errors in the contents of this site are found, please send a message to the website caretaker by using the e-mail link provided below (final item):
