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Optimizing the bene...
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Athley, KarinRISE,Innventia
(författare)
Optimizing the benefit of retention chemicals
- Artikel/kapitelEngelska2014
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LIBRIS-ID:oai:DiVA.org:ri-9553
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https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-9553URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:kon swepub-publicationtype
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Pre-flocculation of filler has been tested as a concept for improving the retention of filler and the strength properties of the sheet. The impact of the size of the filler floes on the mechanical retentionin a fibre network was investigated using a modified laboratory hand sheet former. The mechanical retention was found to increase linearly with both particle size and grammage of the fibre web. These results were confirmed in a full scale production trial on the FEX pilot paper machine at Innventia. Here different filler floe sizes were created through different chemical pre-flocculation strategies. The particle size in the flow to the headbox was measured with FBRM, and a linear relation between particle size and filler retention was found. Corresponding linear relation was seen in a pilot trial when adding filler and retention aid conventionally. This implies that mechanical retention constitute an important part of the filler retention not only upon pre-flocculation but also with conventional addition of filler and retention aid. Thus, the particle size before the headbox can be a good indicator of the retention level. For the conventional application of a two component retention aid system, the increased filler retention correlated to impaired formation and decreased sheet strength. On the contrary, pre-flocculation led to an increase in both sheet strength and filler retention, demonstrating the advantage of pre-flocculating filler.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Granlöf, LarsRISE,Innventia(Swepub:ri)larsgr@ri.se
(författare)
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Söderberg, DanielRISE,Innventia
(författare)
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Ström, GöranRISE,Innventia
(författare)
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RISEInnventia
(creator_code:org_t)
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