High bulk paper

  • US 6,254,725 B1
  • Filed: 06/20/1997
  • Issued: 07/03/2001
  • Est. Priority Date: 06/20/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for making lightweight high bulk coated paper comprising the steps of:

  • providing a waterborne furnish comprising at least 50% mechanical pulp;

    forming a paper web by extruding the furnish onto wire sides of a papermaking apparatus with a gap former;

    pressing excess water from the paper web;

    drying the paper web to a moisture content of less than 10%;

    coating the paper web with a coating weight;

    calendering the coated paper web to a 75°

    TAPPI gloss of 40 or greater; and

    controlling at least one of said aforerecited steps so that the paper web has a caliper of at least about 88% of the total caliper of the coated paper and the coating provides substantially the remainder of the caliper of the coated paper and so that the finished coated paper has a bulk factor of at least 55.

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