Latex uniformity in the coating layer of paper

Eija Kenttä; Tiina Pöhler; Kari Juvonen

doi:10.3183/npprj-2006-21-05-p665-669

Latex uniformity in the coating layer of paper

Eija Kenttä, Tiina Pöhler, Kari Juvonen

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

24 Citations (Scopus)

Abstract

ATR-IR mapping was used to analyze the amount and uniformity of SB latex on the surface of coated paper. It was found that laboratory coatings containing CMC had a higher surface latex content and better uniformity than those without CMC. In calcium carbonate pilot coatings, surface latex content increased and uniformity improved as coat weight increased. However, back-trap mottle was greater in the samples with higher coat weights. In all pilot coatings, the surface latex content was 1-2 parts lower than in the coating color formulation itself. IR surface analysis and z-directional latex distribution analysis suggest that during coating layer consolidation the latex moved towards the base paper more than the pigment.

Original language	English
Pages (from-to)	665-669
Number of pages	5
Journal	Nordic Pulp and Paper Research Journal
Volume	21
Issue number	5
DOIs	https://doi.org/10.3183/npprj-2006-21-05-p665-669
Publication status	Published - 1 Dec 2006
MoE publication type	A1 Journal article-refereed

Keywords

Coated paper
Infrared spectroscopy
Latex
SEM

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AU - Juvonen, Kari

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AB - ATR-IR mapping was used to analyze the amount and uniformity of SB latex on the surface of coated paper. It was found that laboratory coatings containing CMC had a higher surface latex content and better uniformity than those without CMC. In calcium carbonate pilot coatings, surface latex content increased and uniformity improved as coat weight increased. However, back-trap mottle was greater in the samples with higher coat weights. In all pilot coatings, the surface latex content was 1-2 parts lower than in the coating color formulation itself. IR surface analysis and z-directional latex distribution analysis suggest that during coating layer consolidation the latex moved towards the base paper more than the pigment.

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KW - Infrared spectroscopy

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KW - SEM

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