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Malvern rheometer helps Grace Davison bring new food-grade sealants to market

Rotational Rheometer from Malvern Instruments Grace Davison Materials and Packaging Technologies, a product group of W. R. Grace and Co, a leading supplier of state-of-the-art closure systems for rigid packaging, uses a rotational rheometer from Malvern Instruments to accelerate the development of new food-grade and industrial sealants. The rheology of the sealants is a critical attribute for the performance of the package, from food and beverage cans through to 55-gallon drums that require a hermetic seal. The Malvern rheometer has proven to be a cost-effective, reliable and easy-to-use choice for steady shear and oscillatory testing throughout the product development cycle. 

"Using the rheometer shortens research times - a major gain," remarks Salvador Crespo, Senior R&D Chemist, Grace Davison. "The bench top Malvern data provides predictive modelling of liquid and dry flow properties, which are used as a screen to advance new developments into the pilot testing stage. We can get very close to an optimal formulation through small scale rheological testing. The rheometer is easy to clean, and it's simple to switch between different test types for wet or dry samples, aqueous or solvent based systems. Malvern has given us great support to optimise our testing procedures. We are developing a broad line of products to satisfy our customers' needs with state-of-the-art research equipment". 

Grace Davison uniquely supplies the industry with both solvent- and water-based can sealants. The Malvern equipment provides flexibility to develop products within both technology platforms. Continuous innovation enables Grace Davison to bring new high performance products to market.  

The rheometer combines steady shear and oscillatory testing capability with excellent temperature control. Measuring viscosity as a function of shear rate, and of temperature, enables Grace Davison to optimise raw material choice and formulation composition to reach performance targets. Particularly challenging is the development of stable, highly-filled, high-solids dispersions.  Here degradation studies and analysis of the visco-elastic response as a function of time provide the information to formulate products that maintain stable performance under simulated commercial handling conditions.  www.malvern.com  

Malvern and Malvern Instruments are registered trademarks of Malvern Instruments Ltd. GRACE® and GRACE DAVISON® are registered trademarks, of W. R. Grace & Co.-Conn.


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