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Soft tissue having temporary wet strength

  • US 6,149,769 A
  • Filed: 06/03/1998
  • Issued: 11/21/2000
  • Est. Priority Date: 06/03/1998
  • Status: Expired due to Term
First Claim
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1. A soft low density paper product with temporary wet strength, said paper product having a density, a basis weight, a wet burst strength, an initial wet strength, a thirty minute wet strength, and a dry strength, said paper product comprising:

  • papermaking fibers wherein said papermaking fibers comprise between about 13% and about 25% softwood fibers; and

    a chemical strength additive consisting essentially of a temporary wet strength resin;

    wherein said density is less than about 0.6 grams per cubic centimeter, said basis weight is between about 10 and about 65 grams per square meter, said dry strength is less than about 500 grams per inch (197 grams per centimeter), said wet burst strength is at least about 35 grams, the ratio of said initial wet strength to said dry strength is greater than about 0.15;

    1, and the ratio of said thirty minute wet strength to said initial wet strength is less than about 0.4.

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