Prevention of photoyellowing of high-yield pulps using ternary mixtures containing a UV screen, a polyethylene oxide dithiol and sucrose

Petit-Conil, M. and de Choudens, C. and Castellan, Alain and Grelier, Stéphane and Davidson, R. Stephen (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. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

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.

Item Type: Article
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: 16 May 2014 09:22
Resource URI: https://kar.kent.ac.uk/id/eprint/17493 (The current URI for this page, for reference purposes)
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