Multi-ply bath tissue with temporary wet strength resin and/or a particular lignin content

A multi-ply bath tissue comprising:

• (A) a percentage by weight of cellulosic microfibers;
• and
• (B) a percentage by weight of wood pulp fibers,
• the multi-ply bath tissue having sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 75% of the initial value in less than 1 hour after immersion of the tissue in water,
• wherein at least one of the plies, other than an interior ply, comprises:
• (i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;
• (ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet;
• and
• (iii) a plurality of transition regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

A multi-ply bath tissue comprising:

• (A) a percentage by weight of cellulosic microfibers;
• and
• (B) a percentage by weight of wood pulp fibers,
• wherein a percentage by weight of the tissue comprises eucalyptus fibers having a lignin content of at least about 20%, and
• wherein the multi-ply bath tissue has sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than one half hour after immersion of the tissue in water.

A multi-ply bath tissue comprising:

• (A) a percentage by weight of cellulosic microfibers;
• and
• (B) a percentage by weight of wood pulp fibers,
• wherein a percentage by weight of the tissue comprises eucalyptus fibers having a lignin content of at least about 20%, an ISO brightness of at least about 84, a Canadian Standard Freeness (CSF) of at least about 400 ml, a bulk of between 2.2 and 4.2 cc/g, and a breaking length of between about 1.2 and 4.7 km, and
• wherein the multi-ply bath tissue has sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 g/3 in. to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than one hour after immersion in water.

A multi-ply bath tissue product comprising:

• (A) an upper stratified ply comprising two strata, an outer stratum and an inner stratum,
• (a) the outer stratum comprising a blend of at least about 30% to about 70% kraft fiber and at least 30% to about 70% by weight of eucalyptus kraft;
• and
• (b) the inner stratum comprising at least about 50% fibers having a lignin content of at least about 20% by weight;
• (B) an interior ply comprising:
• (a) a percentage by weight of fibers having a lignin content of at least about 20% by weight;
• and
• (b) a percentage by weight of bleached softwood kraft fibers;
• and
• (C) a lower stratified ply comprising two strata, a first stratum and a second stratum,
• (a) the first stratum comprising from at least about 30% to about 70% kraft fiber and from about 30% to about 70% by weight of eucalyptus kraft;
• and
• (b) the second stratum comprising at least about 50% fibers having a lignin content of at least about 20% by weight,
• wherein at least one of the plies comprises:
• (i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;
• (ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet;
• and
• (iii) a plurality of transition regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.

A multi-ply bath tissue product comprising:

• (A) an upper stratified ply comprising two strata, an outer stratum and an inner stratum,
• (a) the outer stratum comprising a blend of at least about 30% to about 70% kraft fiber and at least 30% to about 70% by weight of eucalyptus kraft and at least about 5% by weight of individualized regenerated cellulosic microfibers having a number average diameter of at most about 4 microns and a number average length of between about 50 microns and 2000 microns;
• and
• (b) the inner stratum comprising at least about 70% fibers having a lignin content of at least about 20% by weight;
• (B) an interior ply comprising:
• (a) a percentage by weight of fibers having a lignin content of at least about 20% by weight;
• and
• (b) a percentage by weight of bleached kraft fiber;
• and
• (C) a lower stratified ply comprising at least two strata, including a first stratum and a second stratum,
• (a) the first stratum comprising from at least about 30% to about 70% kraft fiber and from about 30% to about 70% by weight of eucalyptus kraft;
• and
• (b) the second stratum comprising at least about 70% fibers having a lignin content of at least about 20% by weight.

A multi-ply bath tissue comprising:

• (A) a percentage by weight of cellulosic microfibers;
• and
• (B) a percentage by weight of wood pulp fibers,
• the multi-ply bath tissue having:
• (a) sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than 15 minutes after immersion of the tissue in water;
• and
• (b) a caliper of at least 5 mils per 8 sheets per pound of basis weight.

A bath tissue comprising:

• (A) a percentage by weight of cellulosic microfibers;
• and
• (B) a percentage by weight of wood pulp fibers,
• the bath tissue having sufficient temporary wet strength resin to provide an initial Finch Cup cross-machine direction (CD) wet tensile of from about 2.5 to about 20 g/3 in. per pound of basis weight, the initial Finch Cup CD wet tensile decaying to less than 65% of the initial value in less than 15 minutes after immersion in water,
• wherein the bath tissue includes at least one ply comprising:
• (i) a plurality of fiber-enriched hollow domed regions having a relatively high basis weight;
• (ii) a plurality of connecting regions having a relatively lower basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet;
• and
• (iii) a plurality of transition regions with upwardly and inwardly inflected consolidated fibrous regions transitioning from the connecting regions into the fiber-enriched hollow domed regions.