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US 8,187,422 B2Granted
Disposable cellulosic wiper
AssigneeGeorgia-Pacific Consumer Products LP
InventorsDaniel W. Sumnicht, Joseph H. Miller
Life of this patent
Estimating the term…
Abstract
A high efficiency disposable cellulosic wiper includes (a) pulp-derived papermaking fiber; (b) up to 75% by weight regenerated cellulosic microfiber having a characteristic CSF value of less than 175 ml, the microfiber being selected and present in amounts such that the wiper exhibits a Laplace pore volume fraction at pore sizes less than 15 microns of at least 1.5 times that of a like wiper prepared without regenerated cellulose microfiber. The wipers of the invention exhibit remarkable residue removal efficiency.
Claims116
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber having a characteristic scattering coefficient of less than 50 m2/kg;
- (b) up to 75% by weight fibrillated regenerated independent cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml, the microfiber being selected and present in amounts such that the wiper exhibits a scattering coefficient of greater than 50 m2/kg,
- with the proviso that the wiper has more than 25% by weight of the regenerated cellulose microfiber.
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight fibrillated regenerated independent cellulosic microfiber having a characteristic CSF value less than 175 ml and having weight average diameter of less than 2 microns, the microfiber being further characterized in that 40% by weight thereof is finer than 14 mesh,
- with the proviso that the wiper has more than 25% by weight of the regenerated cellulose microfiber.
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight regenerated independent cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml,
- the microfiber being selected and present in amounts such that the wiper exhibits a relative wicking ratio of at least 1.5, with the proviso that the sheet has more than 25% by weight of the regenerated cellulose microfiber.
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight regenerated independent cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml, the microfiber being selected and present in amounts such that the wiper exhibits an average effective pore radius of less than 50 microns,
- with the proviso that the sheet has more than 25% by weight of the regenerated cellulose microfiber.
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight regenerated independent cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml,
- the microfiber being selected and present in amounts such that the wiper exhibits a Relative Bendtsen Smoothness @ 1 kg of pressure of at least 1.5 as compared with a like wiper prepared without microfiber,
- with the proviso that the sheet has more than 25% by weight of the regenerated cellulose microfiber.
1 more element
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight regenerated independent cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml,
- the microfiber being selected and present in amounts such that the wiper exhibits a relative water residue removal efficiency of at least 150% as compared with a like sheet without regenerated cellulosic microfiber,
- with the proviso that the sheet has more than 25% by weight of the regenerated cellulose microfiber.
1 more element
A high efficiency disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight independent regenerated cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml,
- the microfiber being selected and present in amounts such that the wiper exhibits a relative oil residue removal efficiency of at least 150% as compared with a like sheet without regenerated cellulosic microfiber.
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight regenerated independent cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml,
- the microfiber being selected and present in amounts such that the wiper exhibits a Laplace pore volume fraction at pore sizes less than 15 microns of at least 1.5 times that of a like wiper prepared without regenerated cellulose microfiber,
- with the proviso that the sheet has more than 25% by weight of the regenerated cellulose microfiber.
1 more element
A disposable cellulosic wiper comprising:
- (a) 25% or more by weight pulp-derived papermaking fiber;
- (b) up to 75% by weight regenerated independent cellulosic microfiber finer than 14 mesh, having a number average diameter of less than about 2 microns and a characteristic CSF value of less than 175 ml,
- the microfiber being selected and present in amounts such that the wiper exhibits a capillary pressure at 10% saturation by extrusion porisimetry of at least twice that of a like sheet prepared without regenerated cellulose microfiber,
- with the proviso that the sheet has more than 25% by weight of the regenerated cellulose microfiber.
1 more element
Dependencies are inferred from the claim text.