Clariant Launches New Deposit Control Products
 Print this article | Send to Colleague
Clariant, Muttenz, Switzerland, reports that it is offering papermakers new deposit control solutions with the addition of Cartaspers® SCH and Cartabond® DST.01 to its range. The extended portfolio has been developed specifically to improve machine cleanliness and runnability when wastepaper is used as a raw material in the papermaking process.
Cartaspers SCH makes use of nanotechnology to introduce trillions of tiny polymer particles into the wet-end of a paper machine system. The emulsion particles, which are hydrophobic in nature, are derived from a very hard (high melting point) polymer. In a typical wet end environment, the tiny polymer spheres associate themselves with other hydrophobic components in the pulp slurry.
Cartaspers SCH works through a mechanism of passivation, combining with pressure sensitive adhesives, latex binders, pitch, and all other potential "stickie" contaminants, to give them a hard protective shell that prevents agglomeration and reduces the tendency of stickies to foul machine clothing. The increased softening point of the passivated stickies helps prevent "picking" in the drying section and the transfer of contaminant to the hot cylinders is significantly reduced. Addition levels of Cartaspers® SCH are aligned with the degree of stickie contamination and the product is applicable to mills using wastepaper but also virgin fiber as a raw material.
Cartabond DST.01 is a low charge cationic polymer solution designed to reduce turbidity in the wet end circuits, without affecting backwater or fiber charge. Micro-stickies are transferred onto fibers without significantly increasing particle size, unlike the traditional high-charge polyamine coagulants known for creating agglomerated secondary stickies—much larger particles responsible for machine contamination and sheet quality problems.
Primarily, but not exclusively, for tissue grades, the Cartabond DST.01 polymer is rich in hydrogen bonding groups and has been proven as a dry strength additive. The product therefore provides dual functionality and replaces both the coagulant and dry strength resin, the company notes.
|
|
