A COMPREHENSIVE PIGMENT PORTFOLIO
With a unique and comprehensive portfolio of kaolins, calcium carbonates and diatomaceous earth (DE) minerals as well as EcoBright™ and our Formulations Services, Imerys is able to provide its global customer base with a comprehensive portfolio of advanced multi-pigment solutions such as filler additives, coating pigments or processing aids.
Imerys offers a wide range of products throughout the world, differing in shape factor, particle size, particle size distribution, and brightness to suit all pulp, paper and board application needs.
Kaolin from Brazil and Middle Georgia
Kaolin is a hydrated aluminum silicate crystalline mineral formed over millions of years by the hydrothermal decomposition or weathering of granite. One of the most abundant minerals on earth, it is characterized by its fine particle shape and chemical inertness. Drawing upon reserves in Georgia, USA, and Pará, Brazil, Imerys offers the most comprehensive range of kaolins for the paper & board industry from filler clays to calcined clays to engineered kaolins for coating.
Precipitated (PCC) and Ground Calcium Carbonate (GCC)
PCC is produced through a chemical reaction process that utilizes calcium oxide (quicklime), water and carbon dioxide to produce very pure calcium carbonate crystals. Through the reaction process, the crystals can be tailored to a variety of shapes and sizes to best fit a customer’s required performance. GCC is composed of the crystalline mineral calcite which occurs naturally in the form of chalk, marble or limestone. Chalk is usually fine textured and varies in color from deposit to deposit. Processed throughout the US, Brazil and Argentina, Imerys offers a wide range of carbonate products, differing in particle size, particle size distribution and brightness to suit all paper & board application needs.
Diatomaceous earth is a powder produced from diatomite, a mineral silica composed of the skeletal remains of single-cell aquatic plants called diatoms. No other silica source, whether mined or artificially produced, has such a structure. Each diatom is peppered with thousands of holes ranging from a few microns in diameter down to submicron diameters. The unique properties of DE products include high surface area, high absorption power and low specific and bulk density. The high abrasion resistance of the particles, as well as variations in the diatom’s structure in our DE products, impart excellent friction performance in specialty functional papers.
EcoBright™ is a stabilized magnesium hydroxide solution that is not only environmentally friendly, but delivers cost savings by ensuring optimized use of magnesium sulfate, caustic soda, silicate and/or hydrogen peroxide in the recipes. Using Ecobright™ in pulp bleaching can achieve many benefits including higher brightness values, less COD/BOD burden, better pulp dewatering and, consequently, higher yield and cleaner water circuits.
Barrier Coating Formulations Services
Barrikote™ formulations are water-based barrier coatings for paperboard applications. Our barrier coating formulations—applied by metered size press, blade & rod coaters, or flexo printers—provide a sustainable alternative to wax, fluorochemicals and petrochemical-based extruded or laminated polymers such as polyethylene.
We offer a full range of bespoke formulation and technical and process support services to help you match the right mineral grade to your application requirement.