Filler Minerals- General, Processing, Company Profiles, Technology, Applications, Equipment Suppliers, Market

Introduction

Filler minerals is a finely divided inert material (such as pulverized limestone, silica, or colloidal substances) sometimes added to Portland cement paint or other materials to reduce shrinkage, improve workability, or act as an extender.
Physical characteristics of a filler include mean particle diameter, particle size distribution, aspect ratio, surface area, dispersibility, and inherent colour.
Mineral fillers increase the temperature resistance of polymers such as polypropylene and polyamides, allowing them to compete with more expensive materials such as ABS or PBT, respectively, in applications such as automotive interiors.

Technology

A company in Atlanta is extremely excited to bring advanced carbon removal technology to the marketplace because it will allow us to effectively transform coal ash from a ‘waste byproduct that is landfilled’ into a mineral filler product that can be recycled into concrete and other products, thereby reducing the solid waste stream and utilizing a valuable natural resource.
This company intends to commercialize the technology through development and operation of facilities across the country that are designed to remove carbon from the fly ash, rendering a high quality, enhanced fly ash product.

Applications

As a filler in fine printing papers Aluminum trihydrate increases opacity and brightness, and in paper coatings it imparts brightness, gloss and high ink receptivity. ATH is used as a reinforcing pigment in adhesives, where it improves cold flow properties and cohesion, and stabilizes pH.
Paints and primers represent the largest use for filler-grade barite (barium sulfate).
Calcium carbonate is also the most widely used filler in adhesives and sealants.
Diatomite used as a white filler is flux-calcined and then milled, screened, and air classified. In paint, its primary application, it is used to roughen the paint film to provide flatting and improved intercoat adhesion.

Market

Growth in Chinese consumption of kaolin, precipitated calcium carbonate (PCC), ground calcium carbonate (GCC) and talc has been significant over the last decade, closely reflecting the booming demand for paper, plastics and paint in the Chinese economy.
Global extender and filler mineral consumption for paper applications is estimated at 26.4 million tonnes, with Western Europe accounting for an estimated 47% of the total, followed by North America, with an estimated 28% share, and the Asia-Pacific region with 24% of the total.
Competition among mineral fillers continues to be strong in the paper industry. Precipitated calcium carbonate (PCC) and ground calcium carbonate (GCC) continue to take market share from kaolin fillers across most paper grades.
Major areas of focus for future PCC and GCC growth in Europe and North America are in groundwood (wood containing) grades and coated paper and boxboard.

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