Antiblock Mineral Additives for the Plastic Film Industry

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1 Antiblock Mineral Additives for the Plastic Film Industry Proven Products Celite functional additives have been used for antiblocking in polyethylene film for over 50 years. Celite antiblock additives reduce the tendency of thermoplastic film to adhere when compounded as plastic packaging or tightly wound rolls. Addition rates as low as 2,000 ppm provide significant reductions in block/re-block forces. This efficiency results from the unique, irregular particle shapes of the diatoms. Films containing Celite antiblock additives exhibit exceptional clarity. A range of products with different particle sizes and shapes is available to optimize efficiency and cost effectiveness. The original grade of Celite antiblock was Super Floss. Super Floss is still the preferred grade and is recommended for most film applications. Super Fine Super Floss is the grade to consider if your application requires a fine or narrower particle size distribution. Micro Ken 801, White Mist PF, Super Floss MX, Super Floss A and Super Floss E complete the product line. Features and Benefits Celite diatomaceous earth antiblock additives exhibit minimal interactions with other additives in most LDPE and LLDPE resin systems. This assures that the optimal amount of processing aids and other organic additives are used. C e l i t e a d d i t i v e s o f f e r s u p e r i o r economic performance in higher alpha olefin LLDPE systems in which synthetic silica might otherwise be specified. One study, presented by a leading resin producer at ANTEC 99, showed the statistical equivalence of Super Floss to synthetic silica in a 1-octene LLDPE system. A primary objective of our R&D efforts is a continuing product development program, directed at enhancing product performance and assuring multi-plant sources to a growing worldwide market. The latest result of this intense effort is the successful introduction of Super Floss MX in North America, and further significant breakthroughs in antiblock technology are on the horizon.

2 Typical Scanning Electron Micrographs Super Floss Super Floss MX Micro-Ken 801 Antiblock Basics and Applications The theory of antiblocking is that varied particle shapes of diatomite particles protrudes from, or are at the surface of, the polyethylene film. The irregular shaped particles of Celite diatomite silica are extremely efficient for this application in all types of polyolefin films including LLDPE, metallocene PE and polypropylene. Depending on the type of resin used to make the film and the end use application, the amount of Celite antiblock required usually ranges from 0.2% to 0.5% by weight of the resin. Due to the critical nature of incorporating a solid into a solid plastic film, Celite products meet exacting quality control standards. This allows the end user to be assured of a consistent quality antiblock additive batch after batch. In addition to traditional applications in film, Celite additives are used in a wide variety of plastic, plastomer and compounded polymer systems: Antiblocking, prevention of plate out and gloss control in PVC sheets Silica nucleation site for polyurethane Reinforcement and dimensional stability in siloxane (RTV) and extension of the pyrogenic silica Mold release and gloss/sheen control of various other resin systems

3 Celite Polyethylene Film Additives The Industry Standard High Gloss Low Haze Clarity Antiblocking Efficient and Versatile Minimum Loading

4 The physical and chemical properties of Celite Corporation products represent typical, average values obtained in accordance with accepted test methods and are subject to normal manufacturing variations. They are supplied as a technical service and are subject to change without notice. Contact the nearest Celite Corporation sales office to ensure current information. Celite Corporation A World Minerals Company P.O. Box 519 Lompoc, CA U.S.A. All diatomite product trademarks referenced herein are registered trademarks of Celite Corporation World Minerals Inc. All Rights Reserved FF Tel: Fax: Web: Info@worldminerals.com Printed in U.S.A.

5 Typical Physical and Chemical Properties All data are typical, or estimated, and are not to be used as specifications. Super Floss E < < Super Floss E Total Product Support Celite Corporation is the largest producer of diatomite products in the world. Our products offer consistently high quality, worldwide sources of supply, superior technical support, and unsurpassed customer service. In addition, our extensive Research and Development Department is continually seeking to develop new products to assist manufacturers in achieving the maximum functionality and quality in their products. Celite products are available on a direct basis and through our international network of authorized distributors. To meet the specific needs of our customers, antiblock and additive products are packaged in 44-lb. polyethylene, 50-lb. paper and FIBC bags. For more information on our mineral additive products, or to locate a distributor near you, please contact us at World Minerals Inc., a member of Imerys

6 Particle Size Distribution For Antiblock Additives The charts below show the cumulative and differential particle size distributions of each Celite antiblock additive grade. These particle size distributions represent typical, average values obtained from a laser particle size analyzer using standard test methods. Volume % Undersize Cumulative Size Distribution Grade Super Fine Super Floss Super Floss E Super Floss White Mist PF Micro Ken 801 Super Floss MX Particle Size (microns), Log Scale Differential Volume % Differential Size Distribution Grade Super Fine Super Floss Super Floss E Super Floss White Mist PF Micro Ken 801 Super Floss MX Particle Size (microns), Log Scale Publication date: Aug2010