Specific topics include: reasons for sizing, requirements for an internal size, effects of additives, types of
rosin size, wet end differences, size and alum, size testing techniques, and synthetic sizes.
Hercules Inc., Wilmington, Delaware, USA, said its pulp and paper division will become the exclusive toll manufacturer of dispersed
rosin size for MeadWestvaco Corp., Stamford, Connecticut.
APPLICATION: This study may help in developing new technologies for using
rosin size or anionic polymer size under neutral-alkaline papermaking systems.
N-vinylformamide has an active formamido group that has some interesting interactions with cellulose fibers and
rosin size particles.
"The major compelling event that drove the introduction and acceptance of microparticle retention and drainage aid systems was the alkaline conversion of the fine paper market with PCC and alkaline size to replace acid papermaking with
rosin size and filler clays," said Ciba's Tremont.
All of the sizes were cationic dispersed
rosin sizes, a popular and versatile type of
rosin size.
And since the Vinings acquisition, Kemira now provides both process additives (defoamers, deinking agents, biocides, deposit control products, etc.) as well as functional additives such as ASA, AKD,
rosin size, and polymers to a worldwide market.
The combined business will offer both process additives such as defoamers, deinking agents, biocide, and deposit control products--and Kemira's functional additives, such as ASA, AKD,
rosin size, and polymers.
These include polymers and coagulants for retention and water treatment, AKD, ASA and
rosin sizes, wet and dry strength chemicals, deposit control and defoaming agents as well as deinking chemicals.
The acquisition would include the transfer of manufacturing and application technology for
rosin sizes and wet end chemicals to Kemira, according to the company.
These include polymers and coagulants for retention and water treatment, AKD, ASA and
rosin sizes, hydrogen peroxide for bleaching, and certain deposit control and defoaming agents as well as deinking chemicals.
STATISTICAL MODELING AND SIZING DETERMINATION GUIDES FOR DISPERSED
ROSIN SIZES