Clariant CESA®-extend masterbatches restore recycled PET, PLA for high-value packaging needs


  • Improved processability of high-regrind-content polymers
  • Restored strength comparable to virgin material
  • Excellent for packaging requiring high recycled content
Charlotte, April 4, 2017 – Clariant, a world leader in specialty chemicals, now offers enhanced formulations of CESA-extend masterbatches that restore important material properties to recycled condensation polymers including PET, PLA, and polycarbonate. This means even high percentages of regrind can be incorporated with virgin resin without significantly reducing physical properties required in food-contact and other high-performance packaging applications.

The latest CESA-extend masterbatches provide a simple, low-cost solution for increasing molecular weight and restoring physical properties, melt strength, and processability that are lost when PET and PLA polymer chains break down during processing and recycling. When added to these recycled materials during processing, CESA-extend masterbatches react with, and re-link, broken polymer chains. Long polymer chains are essential in both PET and PLA extrusion because they give the extruded material the tensile strength essential for good performance when formed into packaging materials.

"CESA-extend masterbatches give processors an affordable, sustainable way to meet growing market demands for higher levels of recycled content in food packaging applications. One of our customers was even able to achieve acceptable results using 100% regrind," says Peter Prusak, Clariant Head of Marketing for North America. Pelletized CESA-extend masterbatches are available in standard and custom formulations, and can be used to control or enhance a range of material parameters, including melt-flow index (MFI), intrinsic viscosity, hydrolytic stability, mechanical properties and clarity. They can also be custom formulated to provide both linear and branched chain extension.

CESA® IS A TRADEMARK OF CLARIANT REGISTERED IN MANY COUNTRIES.

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This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application. 


* Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.

* For sales to customers located within the United States and Canada the following applies in addition: No express or implied warranty is made of the merchantability, suitability, fitness for a particular purpose or otherwise of any product or service.

© Trademark of Clariant registered in many countries.
® 2013 Clariant International Ltd

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