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1 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

1 2012

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Aspects of thermal ageing of paper products from waste pulp type C with the addition of different colour pigments

Modzelewska I., Patelski E., Kujaszewska A.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2012

No. 79

47--51

Aspects of thermal ageing of paper products from waste pulp type C with the addition of different colour pigments. This work constitutes the fragment of the research on broad issue concerning aspects of the ageing process of paper products obtained from waste pulps, examining the income of the allowance of colourful pigments of the thermal decline of papers from waste pulp type C (office waste paper). The paper sheets were produced from the 3%, the 5% and the 10% with addition of titanic white and synthetic ferric pigments (combination Fe2O3 and FeO(OH)) Bayferrox 610 and 960. Test samples were formed without pulp additions. The paper sheets, in laboratory conditions, were examined taking into account the colour and breaking length. Next, paper was subjected artificial ageing, under the influence of the temperature and the change of its colour and breaking length were indicated. Examinations showed that along with the growth of the participation of pigments the change of the colour of paper was falling, and fall breaking length of paper with pulp additions is not so violent like in the case of control samples. After analysing research findings they stated, that addition of colouring centres i.e. as synthetic ferric pigments to paper products from waste pulp type C is beneficial since their presence is delaying the ageing process, and does not affect much breaking length.