Kumar V.,Abo Akademi University |
Bollstrom R.,Omya International AG |
Yang A.,Styron LLC |
Chen Q.,South China University of Technology |
And 4 more authors.
Cellulose | Year: 2014
Nanocellulose is an interesting building block for functional materials and has gained considerable interest due to its mechanical robustness, large surface area and biodegradability. It can be formed into various structures such as solids, films and gels such as hydrogels and aerogels and combined with polymers or other materials to form composites. Mechanical, optical and barrier properties of nanofibrillated cellulose (NFC) and microfibrillated cellulose (MFC) films were studied in order to understand their potential for packaging and functional printing applications. Impact of raw material choice and nanocellulose production process on these properties was evaluated. MFC and NFC were produced following two different routes. NFC was produced using a chemical pretreatment followed by a high pressure homogenization, whereas MFC was produced using a mechanical treatment only. TEMPO-mediated oxidation followed by one step of high pressure (2,000 bar) homogenization seems to produce a similar type of NFC from both hardwood and softwood. NFC films showed superior mechanical and optical properties compared with MFC films; however, MFC films demonstrated better barrier properties against oxygen and water vapor. Both the MFC and NFC films were excellent barriers against mineral oil used in ordinary printing inks and dichlorobenzene, a common solvent used in functional printing inks. Barrier properties against vegetable oil were also found to be exceptionally good for both the NFC and MFC films. © 2014 Springer Science+Business Media Dordrecht. Source
Shu J.,JiAn Company |
Yang A.,Styron LLC |
Salminen P.,South China University of Technology |
Tappi Journal | Year: 2014
The Ji'an PM No. 3 is the first linerboard machine in China to use multilayer curtain coating technology. Since successful startup at the end of 2011, further development has been carried out to optimize running conditions, coating formulations, and the base paper to provide a product with satisfactory quality and lower cost to manufacture. The key challenges include designing the base board structure for the desired mechanical strength, designing the surface properties for subsequent coating operations, optimizing the high-speed running of the curtain coater to enhance production efficiency, minimizing the amount of titanium dioxide in the coating color, and balancing the coated board properties to make them suitable for both offset and flexographic printing. The pilot and mill scale results show that curtain coating has a major positive impact on brightness, while smoothness is improved mainly by the blade coating and calendering conditions. Optimization of base board properties and the blade + curtain + blade concept has resulted in the successful use of 100% recycled fiber to produce base board. The optical, mechanical, and printability properties of the final coated board meet market requirements for both offset and flexographic printing. Machine runnability is excellent at the current speed of 1000 m/min, and titanium dioxide has been eliminated in the coating formulations without affecting the coating coverage. A significant improvement in the total cost of coated white liner production has been achieved, compared to the conventional concept of using virgin fiber in the top ply. Future development will focus on combining low cost with further quality improvements to make linerboard suitable for a wider range of end-use applications, including frozen-food packaging and folding boxboard. Source
Styron Europe Gmbh, Styron Llc and Dow Chemical Company | Date: 2007-08-07
SYNTHETIC RESINS IN RAW STATE; UNPROCESSED ARTIFICIAL RESINS; UNPROCESSED PLASTICS; ALL FOR USE IN FURTHER MANUFACTURING.
Styron Europe Gmbh, Styron Llc and Dow Chemical Company | Date: 2010-02-16
CHEMICALS USED IN INDUSTRY, NAMELY, POLYMERIC COMPOSITIONS FOR USE IN THE MANUFACTURE OF BACKINGS FOR CARPET, SYNTHETIC TURF AND CARPET PADDING.
Styron Europe Gmbh, Styron Llc and Dow Chemical Company | Date: 2009-06-02
chemical products used in industry, namely, latex adhesives and binders for industrial purposes.