NEW TECHNOLOGY: COATING
NEW TECHNOLOGY RANGE FROM CLARIANT
Clariant Paper Business announces the launch of its redesigned Cartacoat RM range of rheology modifiers.
Rheology modifiers are chemicals that are added into the paper coating and aimed at improving coating colours and
runnability, as well as the paper and print quality. The Cartacoat RM series combines the features expected from such products, whilst allowing up to 30% in your production costs.
The Cartacoat RM range allows control
of high shear and low shear viscosity and water retention to achieve better runnability and optimum coating colour rheology. Cartacoat RM products can be used for instance for blade coating or MSP-applications with all paper
and board grades.
A complete toolset
Rheology modifiers are no novelty to Clariant's portfolio. Instead, the newly developed Cartacoat products add to the previous range, forming a complete toolset that will allow papermakers to solve any rheology-related issue in their papermaking process:
- Cartacoat RM 8 liquid: Water retention aid for paper and board coating colour with small effect on low shear and high shear viscosity. Improves the paper properties by reducing water penetration into the base sheet. FDA and BfR compliant.
- Cartacoat RM 12 liquid: Allows good water retention and increases both low and high shear viscosity.
- Cartacoat RM 15 liquid: Especially suitable in the manufacturing of coated board and packaging paper, offering a good balance between Brookfield viscosity and water retention. FDA and BfR compliant.
- Cartacoat RM 20 liquid: Shows optimal high shear properties with high Brookfield viscosity. Small dosing levels needed. Low influence on high shear viscosity and low blade pressure.
Optimised chemistry
The thickening mechanism of Cartacoat RM rheology modifiers, as shown in the illustration below, comprises two steps:
1) Expansion of macro-chains, due to the high electrostatic charge repulsion
2) Inter-moluecular attraction facilitates formation of a 3-D network
Cartacoat RM products replace conventional synthetic rheology modifiers with lower blade pressure, allowing increased
coater speed. The products also make it possible to increase the dry solid content of the coating colour, with a
positive effect on optical and printing properties. Cartacoat RM can replace CMC partially or totally, offering the possibility to increase the amount of PVOH or starch as an OBA carrier, in order to improve whiteness.
For further information, please contact your local Clariant representative.
