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 available from this repository)

The full text of this publication is not available from this repository. (Contact us about this Publication)

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: http://kar.kent.ac.uk/id/eprint/17493 (The current URI for this page, for reference purposes)
  • Depositors only (login required):