Omya Multifill® is not simply a product but a versatile concept to optimize paper – in quality, performance and cost. With the expertise and know-how of our technicians as well as the various analytical services we can provide Omya Multifill® helps paper makers formulate raw materials in a cost efficient way, optimize production processes and gain customer recognition.
Filler Wet End Optimization
The first step of the Omya Multifill® concept is a
comprehensive wet end survey to ensure the actual filler type and accompanying
chemistry are properly adjusted to the productive conditions and the paper
grade. Alternative filler grades with different pigment characteristics in
terms of morphology, particle size distribution or surface area may be recommended
to match customer needs. Retention systems, crucial for sheet formation, and
sizing efficiency are checked and optimized as well. Thanks to the wide
experience and process expertise of the Omya specialists, filler levels can
often be increased by a few percent without any drawbacks on production process
or paper quality.
Surface Filling (SF) technology enables paper makers to replace costly fibers with extra filler, through a size press, a metering size press or gate rolls. Existing starch formulations can be integrated into the concept to embed the filler in the fiber matrix. The additional pigments do not interfere with established hydrogen bonds, responsible for strength properties; they penetrate through the surface into the sheet and fill the voids between the fiber matrix. The starch applied lowers dusting and may provide extra strength in z-direction.
Omyaload® SB self-binding technology refers to a GCC/bio-polymer co-process. Polymers bond permanently to the calcium carbonate particles to form stable complexes that withstand shear-forces in the papermaking process. Omyaload® SB self-binding pigments are deeply embedded in the fiber matrix and firmly attached to the fiber. Moreover, hydrogen bonds are less affected than with conventional filler grades.
Omyaload® PF Pre-Flocculation is a process step in on-site PCC production, forming conglomerates to be embedded in the fiber matrix. Omyaload® PF conglomerates have less impact on the forming of hydrogen bonds than singularized and widely scattered particles. As a result, paper strength properties are improved at identical filler levels. In addition, Omyaload® PF conglomerates, being better embedded, reduce paper dusting.
PCC conglomerate embedded in fiber matrix
What benefits can Omya Multifill® concept provide?
Omya Multifill® is an integral but flexible concept to optimize paper in quality, performance and cost. It enables more independent raw material procurement, optimizes production processes, increases productivity and enhances profitability. Paper producers may benefit from:
- Cost savings through replacement of fibers by mineral
- Cost savings through reduced energy demand, favored by easier dewatering & drying at higher filler loads
- Enhanced runability through better wet strength properties
- Improved paper properties (physical and optical)
- Upgraded paper quality facilitating finishing, printing & further processing
- Creation of specific paper characteristics, opening new markets
- Improved competitiveness