초록

A base sheet for food wrap products. The base sheet can include a pulp-derived papermaking fiber and a fibrillated regenerated cellulose microfiber having a CSF value of less than about 175 mL.

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1. A base sheet for food wrap products, comprising: a pulp-derived papermaking fiber; anda fibrillated regenerated cellulose microfiber having a CSF value of less than about 175 mL, wherein the base sheet has a SAT value of less than 2 g/g, a 1-sheet caliper from about 1 mil to about 3 mils, a basis

1. A base sheet for food wrap products, comprising: a pulp-derived papermaking fiber; anda fibrillated regenerated cellulose microfiber having a CSF value of less than about 175 mL, wherein the base sheet has a SAT value of less than 2 g/g, a 1-sheet caliper from about 1 mil to about 3 mils, a basis weight from about 5 lbs to about 25 lbs per 3,000 ft2, and an MD tensile of greater than about 5 lbs/inch. 2. The base sheet of claim 1, wherein the fibrillated regenerated cellulose microfiber has a CSF value of less than about 100 mL. 3. The base sheet of claim 1, wherein the fibrillated regenerated cellulose microfiber has a CSF value of less than about 25 mL. 4. The base sheet of claim 1, wherein the fibrillated regenerated cellulose microfiber has a number average diameter of from about 0.1 microns to about 2 microns. 5. The base sheet of claim 1, wherein the fibrillated regenerated cellulose microfiber has a coarseness value of from about 0.001 mg/100 m to about 0.6 mg/100 m. 6. The base sheet of claim 1, wherein the fibrillated regenerated cellulose microfiber has a weight average diameter of less than about 2 microns, a weight average length of less than about 500 microns, and a fiber count of greater than about 400 million fibers/gram. 7. The base sheet of claim 1, wherein the fibrillated regenerated cellulose microfiber has a fiber count greater than about 200 billion fibers/gram. 8. The base sheet of claim 1, wherein at least about 50 wt % of the fibrillated regenerated cellulose microfiber is finer than 14 mesh. 9. The base sheet of claim 1, wherein at least about 75% by weight of the fibrillated regenerated cellulose microfiber is finer than 14 mesh. 10. The base sheet of claim 1, wherein the base sheet comprises from about 15 wt % to about 95 wt % of the fibrillated regenerated cellulose microfiber. 11. The base sheet of claim 1, wherein the base sheet has a pore size of less than about 15 microns. 12. The base sheet of claim 1, wherein the base sheet has about 50% of its cumulative pore volume in pore sizes of about 15 microns or less. 13. A base sheet for food wrap products, comprising: a pulp-derived papermaking fiber;a fibrillated regenerated cellulose microfiber having a CSF value of less than about 175 mL, a weight average length of less than about 400 microns, and a weight average diameter of less than about 2 microns; anda water or grease resistant agent, or both applied to the base sheet in water borne form, melt form, or as a latex,wherein the base sheet has a SAT value of less than 2 g/g, a MD tensile strength of greater than about 10 lbs/inch, and a pore size of less than about 15 microns. 14. The base sheet of claim 13, wherein the fibrillated regenerated cellulose microfiber has a CSF value of less than about 25 mL. 15. The base sheet of claim 13, wherein the base sheet has a 1-sheet caliper of about 1 mil to about 3 mils and a basis weight of about 5 lbs to about 25 lbs per 3,000 ft2.