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Reduction of offset linting: a comparison of six mills part II. Wood furnish, pulp and paper machine effects

Pulp & paper Canada, 1995-11, Vol.96 (11), p.32

Copyright Southam Business Communications, Inc. Nov 1995 ;ISSN: 0316-4004 ;EISSN: 1923-3515

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  • Title:
    Reduction of offset linting: a comparison of six mills part II. Wood furnish, pulp and paper machine effects
  • Author: Wood, J R
  • Subjects: Newsprint ; Printing properties
  • Is Part Of: Pulp & paper Canada, 1995-11, Vol.96 (11), p.32
  • Description: Of the three lower linting mills, two had relatively high burst indices suggesting increased specific energy application, while the third had a paper machine which would produce a low linting sheet from a pulp with a significantly lower burst level. Also, the sheet made from the pulp with the highest burst strength was not a low linting sheet. This was the sheet which contained high-yield sulphite as reinforcing pulp. The main information on the influence of the paper machine on sheet linting was qualitative, obtained from scanning electron micrographs of the surfaces of the sheets. Figure 3 shows photomicrographs of the top sides of sheets from machine B which showed low linting and F which showed high linting. The obvious differences shown here were general for the entire set of 12 sheet surfaces. Low linting surfaces appeared smooth and well consolidated, similar to those of the sheet from mill B, on the left in Fig. 3. Badly linting surfaces were less consolidated and had obvious holes in the surface similar to the sheet from mill F, on the right in Fig. 3. These differences were not revealed by Parker Print Surf (PPS) roughness. Sheet F had the lowest PPS S10 of the set. Abstract: [Linting] of sheets from six eastern Canadian twin-wire machines making newsprint from TMP was assessed by printing heatset and conventional offset on two commercial-scale presses. Low linting sheet surfaces were uniform and well compacted without obvious holes between fibres on the surface. Low linting is therefore not achieved by washing fines from the surface but rather by interaction of pulp quality and papermaking to retain fine material in the sheet surface during forming and ensure that it is well compacted during pressing. Low linting was associated with stable refining conditions as indicated by a high long fibre content.
  • Publisher: Westmount: Annex Publishing & Printing, Inc
  • Language: English
  • Identifier: ISSN: 0316-4004
    EISSN: 1923-3515
  • Source: ProQuest Central
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