Process for preparing base paper for fine paper
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United States of America Patent
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Jun 18, 2002
Grant Date -
Jul 19, 2001
app pub date -
Sep 16, 1998
filing date -
Sep 16, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention concerns a method for producing a base paper for fine papers, the base paper being produced from a mixture of a mechanical pulp and a chemical pulp. The chemical pulp used comprises a chemical softwood pulp having a elastic modulus close to that of the mechanical pulp and a great bonding strength. It is preferred to use a chemical softwood pulp which produces a sheet having a elastic modulus of less than 6000 N/mm.sup.2 when the bonding strength is 400 J/m.sup.2. A pulp of this kind has a good ScottBond strength at the same light scattering. The base paper produced by the method can therefore be used in double-coated fine papers which require a large bonding strength of the base paper.
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