Petit-Conil, M. and de Choudens, C. and Castellan, A. and Grelier, S. and Davidson, R.S. (1998) Prevention of photoyellowing of high-yield pulps using ternary mixtures containing a UV screen, a polyethylene oxide dithiol and sucrose. Journal of Pulp and Paper Science, 24 (6). pp. 167-172. ISSN 0826-6220.
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Trials were carried out on printing papers containing different high-yield pulps (SGW) poplar CTMP softwood PGW) to protect them against photoyellowing using mixtures containing the commercial UV absorber Tinuvin 1130 (T1130), a polyethylene oxide dithiol (PEG) and sucrose. Emulsions were prepared with these chemicals and oleic acid by dynamic stirring. Size-press technology was used to deposit each protecting emulsion on the surface of papers. Colour reversion was efficiently reduced by the three-component mixture; nevertheless to limit significantly the brightness reversion the sucrose charge must be sufficiently high. Trials with an experimental paper machine equipped with a size press confirmed the laboratory results and showed that the protecting emulsion does not perturb the paper sheet formation.
|Subjects:||T Technology > TP Chemical technology
Q Science > QD Chemistry
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||M.A. Ziai|
|Date Deposited:||29 Jun 2011 08:17|
|Last Modified:||29 Jun 2011 08:17|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/17493 (The current URI for this page, for reference purposes)|
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