Belt-creped, variable local basis weight multi-ply sheet with cellulose microfiber prepared with perforated polymeric belt

A multi-ply wiper/towel product comprising:

• a wet laid web comprising at least 10% fibrillated regenerated cellulosic microfibers, and at least about 40% wood pulp derived papermaking fibers, wherein the fibrillated regenerated cellulosic microfibers have (a) a weight average diameter of less than 0.5 microns, (b) a weight average length of less than 300 microns, and (c) a fiber count of greater than 10 billion fibers/gram,
• the multi-ply wiper/towel product having upper and lower surfaces having formed therein:
• (i) a plurality of fiber-enriched hollow domed regions protruding from the upper surface of the wiper/towel product, the hollow domed regions having a sidewall of a relatively high local basis weight formed along at least a leading edge thereof;
• (ii) connecting regions of a relatively lower local basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the wiper/towel product;
• and
• (iii) consolidated groupings of fibers that extend upwardly and inwardly from the connecting regions into the sidewalls of the fiber-enriched hollow domed regions formed along at least the leading edge thereof,
• wherein fibrillated regenerated cellulosic microfibers present in the web form venation on the surface of the consolidated groupings of fibers, such that the surface has raised, generally continuous ridges defined thereacross.

A multi-ply wiper/towel product of cellulosic fibers comprising:

• at least about 10% fibrillated regenerated cellulosic microfibers having a Canadian Standard Freeness (CSF) value of less than 175 mL, and at least about 40% wood pulp derived papermaking fibers,
• the wiper/towel product having formed therein:
• (A) a plurality of fiber-enriched regions including (i) hollow domed portions having respective sidewalls of a relatively high local basis weight formed along at least a leading edge thereof and (ii) pileated fiber-enriched portions with a cross machine direction (CD) fiber orientation bias adjacent to the hollow domed portions, the fiber-enriched portions being interconnected with:
• (B) connecting regions of a relatively lower local basis weight,
• wherein the sidewalls of the hollow domed portions comprise upwardly projecting densified sidewalls, and at least a portion of each of the upwardly projecting densified sidewalls comprises a densified region that also extends inwardly, the wiper/towel product having a caliper of from 7.5 to 12 mils/8 sheets/per pound per ream and exhibiting a wipe-dry time of less than 20 seconds, an SAT capacity in the range of 9.5 to 11.0 g/g, an SAT rate in the range of 0.05 to 0.25 g/s0.5, a CD wet breaking length in the range of 300 to 800 m, and a wet/dry CD tensile ratio of from 40% to 60%.

A multi-ply wiper/towel product of cellulosic fibers comprising:

• at least about 10% fibrillated regenerated cellulosic microfibers and at least about 40% wood pulp derived papermaking fibers, the fibrillated regenerated cellulosic microfibers having (a) a weight average diameter of less than 2 microns, (b) a weight average length of less than 500 microns, and (c) a fiber count of greater than 400 million fibers/gram,
• the wiper/towel product being formed with upper and lower sides having:
• (i) a plurality of fiber-enriched hollow domed regions having consolidated caps, the fiber-enriched hollow domed regions projecting from the upper side of the sheet and having a sidewall of a relatively high local basis weight formed along at least a leading edge thereof;
• and
• (ii) connecting regions of a relatively lower local basis weight forming a network interconnecting the hollow domed regions of the sheet,
• wherein the wiper/towel product exhibits a differential pore volume for pores under 5 microns in a diameter of at least about 100 mm3/g/micron.

A multi-ply wiper/towel product comprising:

• at least one wet laid web comprising at least about 10% fibrillated regenerated cellulosic microfibers, and at least about 40% wood pulp derived papermaking fibers,
• the wiper/towel product being formed with upper and lower surfaces comprising:
• (i) a plurality of fiber-enriched hollow domed regions protruding from the upper surface of a sheet, the hollow domed regions having a sidewall of a relatively high local basis weight formed along at least a leading edge thereof;
• (ii) connecting regions of a relatively lower local basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet;
• and
• (iii) consolidated groupings of fibers that extend upwardly from the connecting regions into the sidewalls of the fiber-enriched hollow domed regions along at least the leading edge thereof,
• wherein the wiper/towel product exhibits a differential pore volume for pores under 5 microns in a diameter of at least about 100 mm3/g/micron.

A multi-ply wiper/towel product comprising:

• at least one wet laid web comprising at least about 10% fibrillated regenerated cellulosic microfibers having a Canadian Standard Freeness (CSF) value of less than 175 mL, 40% by weight of which is finer than 14 mesh, and at least about 40% wood pulp derived papermaking fibers, the at least one wet laid web having:
• (A) a plurality of fiber-enriched regions including (i) hollow domed portions having respective sidewalls of a relatively high local basis weight formed along at least a leading edge thereof and (ii) pileated fiber-enriched portions with a cross machine direction (CD) fiber orientation bias adjacent to the hollow domed portions, the fiber-enriched portions being interconnected with:
• (B) connecting regions of a relatively lower local basis weight,
• wherein the hollow domed portions have upwardly projecting densified sidewalls, at least a portion of each of the upwardly projecting densified sidewalls comprising a densified saddle shaped region that extends inwardly, and
• wherein the at least one wet laid web exhibits a differential pore volume for pores under 5 microns in a diameter of at least about 100 mm3/g/micron.

A multi-ply wiper/towel product of cellulosic fibers comprising:

• at least one wet laid web comprising at least about 10% fibrillated regenerated cellulosic microfibers having a Canadian Standard Freeness (CSF) value of less than 175 mL and at least about 40% wood pulp derived papermaking fibers,
• the wiper/towel product having formed therein:
• (A) a plurality of fiber-enriched regions including (i) hollow domed portions having respective sidewalls of a relatively high local basis weight formed along at least a leading edge thereof and (ii) pileated fiber-enriched portions with cross machine direction (CD) fiber orientation bias adjacent to the hollow domed portions, the fiber-enriched portions being interconnected with:
• (B) connecting regions of a relatively lower local basis weight,
• wherein the hollow domed portions have upwardly projecting densified sidewalls, at least a portion of each of the upwardly projecting densified sidewalls comprising a densified region that extends inwardly, and
• wherein the wiper/towel product has a bulk of from about 9 to about 19 cm3/g and exhibits a wipe-dry time of less than 20 seconds, an SAT capacity in the range of 9.5 to 11.0 g/g, an SAT rate in the range of 0.05 to 0.25 g/s0.5, a cross machine direction (CD) wet breaking length in the range of 300 to 800 m, and a wet/dry CD tensile ratio of from 40% to 60%.

A multi-ply absorbent sheet comprising:

• at least one wet laid web comprising at least 10% fibrillated regenerated cellulosic microfibers and at least about 40% wood pulp derived papermaking fibers,
• the absorbent sheet comprising a multi-ply wiper/towel product being formed with upper and lower surfaces having formed therein:
• (i) a plurality of fiber-enriched hollow domed regions protruding from the upper surface of the wiper/towel product, the hollow domed regions having respective sidewalls of a relatively high local basis weight formed along at least a leading edge thereof;
• and
• (ii) connecting regions of a relatively lower local basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the wiper/towel product,
• wherein the fibrous composition of the web, geometry of the fibrillated regenerated cellulosic microfibers, and number average count are chosen such that the multi-ply wiper/towel product exhibits a wipe-dry time of less than 20 seconds and an SAT capacity in the range of 9.5 to 11.0 g/g.

A multi-ply wiper/towel product comprising:

• at least one wet laid web comprising at least about 10% fibrillated regenerated cellulosic microfibers and at least about 40% wood pulp derived papermaking fibers,
• the wiper/towel product being formed with upper and lower surfaces comprising:
• (i) a plurality of fiber-enriched hollow domed regions protruding from the upper surface of the wipe/towel product, the hollow domed regions having respective sidewalls of a relatively high local basis weight formed along at least a leading edge thereof;
• and
• (ii) connecting regions of a relatively lower local basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the wiper/towel product,
• wherein the wiper/towel product exhibits a relative wipe dry time that is less than 50% of the wipe dry time exhibited by a different wipe of the same fibrous composition, but without fibrillated regenerated cellulosic microfibers.

A multi-ply absorbent sheet comprising:

• at least one wet laid web comprising at least 10% fibrillated regenerated cellulosic microfibers and at least about 40% wood pulp derived papermaking fibers,
• the absorbent sheet comprising a wiper/towel product being formed with upper and lower surfaces having formed therein:
• (i) a plurality of fiber-enriched hollow domed regions protruding from the upper surface of the wiper/towel product, the hollow domed regions having respective sidewalls of a relatively high local basis weight formed along at least a leading edge thereof;
• and
• (ii) connecting regions of a relatively lower local basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the wiper/towel product, wherein the fibrous composition of the web, geometry of the fibrillated regenerated cellulosic microfibers, and number average count are chosen such that the wiper/towel product exhibits a differential pore volume of at least about 10% for pores under 5 microns in diameter, and
• wherein the wiper/towel product exhibits a relative wipe dry time that is less than 50% of the wipe dry time exhibited by a different wipe of the same fibrous composition, but without fibrillated regenerated cellulosic microfibers.

A multi-ply absorbent sheet comprising:

• at least one wet laid web comprising at least about 10% fibrillated regenerated cellulosic microfibers and at least about 40% wood pulp derived papermaking fibers,
• the multi-ply absorbent sheet comprising a wiper/towel product being formed with upper and lower surfaces comprising:
• (i) a plurality of fiber-enriched hollow domed regions protruding from the upper surface of the sheet, the hollow domed regions having respective sidewalls of a relatively high local basis weight formed along at least a leading edge thereof;
• and
• (ii) connecting regions of a relatively lower local basis weight forming a network interconnecting the fiber-enriched hollow domed regions of the sheet,
• wherein the fibrous composition of the web, geometry of the fibrillated regenerated cellulosic fibers, and number average count are chosen such that the multi-ply wiper/towel product exhibits a wipe-dry time of less than 20 seconds, a differential pore volume of at least about 10% for pores under 5 microns in diameter, and an SAT capacity in the range of 9.5 to 11.0 g/g.