Methods of cleaning papermaking fabrics are disclosed. Cleaning compositions for cleaning papermaking fabrics are also disclosed.

Methods of cleaning papermaking fabrics are disclosed. Cleaning compositions for cleaning papermaking fabrics are also disclosed.

[Problem] To provide a method for spraying a chemical solution that makes it possible to uniformly apply a chemical solution onto a moving body and that exhibits excellent spraying efficiency. [Solution] The present invention is directed to a method for spraying a chemical solution in which, in a dry part D of a paper-making machine, a chemical solution is continuously sprayed onto a moving body that guides wet paper X, while a nozzle device S is reciprocating in directions orthogonal to a moving direction of the moving body with the moving body in motion, wherein: the moving body is a cylindrical dryer roller D1 or an endless canvas K1; and a travel distance H that the nozzle device S moves during a single rotation of the moving body and a width W of a sprayed area that is formed on the moving body by the nozzle device S satisfy the relationship represented by the following expression: 0.5H/W20.

A sheet manufacturing apparatus includes a processing roller, a first processing unit configured to clean the processing roller, a second processing unit configured to separate the first processing unit from the processing roller, a driving unit configured to drive the first processing unit and the second processing unit, and a gear interposed between the driving unit and the first processing unit and the second processing unit. The gear includes an input gear configured to receive driving force from the driving unit, an input shaft configured to rotate in conjunction with the input gear, and a first gear and a second gear whose rotation shaft is the input shaft. Driving force in a first rotation direction is output from the input shaft to the first processing unit via the first gear, and driving force in a second rotation direction is output from the input shaft to the second processing unit via the second gear.

A sheet manufacturing apparatus includes a processing roller configured to process a web containing fibers, a cleaning unit including a cleaning roller unit, a blade unit, and a hammer unit, and a control unit. The cleaning roller unit is configured to clean the processing roller, the blade unit is configured to clean the cleaning roller unit, and the control unit is configured to cause the hammer unit to apply an impact to the blade unit.

A sheet manufacturing apparatus includes a processing roller configured to process a web containing fibers, a cleaning unit including a cleaning roller unit, a blade unit, and a hammer unit, and a control unit. The cleaning roller unit is configured to clean the processing roller, the blade unit is configured to clean the cleaning roller unit, and the control unit is configured to cause the hammer unit to apply an impact to the blade unit.

A system and method of cleaning an imprinting fabric used to make bath tissue, paper towel, or facial tissue, in which the imprinting fabric is washed with water from high pressure impact showers and flooding showers, and water remaining on the imprinting fabric after the step of washing is removed with a vacuum roll on a sheet side of the imprinting fabric. The system and method does not involve removing water from the fabric with a uhle box on the sheet side of the imprinting fabric.

A system and method of cleaning an imprinting fabric used to make bath tissue, paper towel, or facial tissue, in which the imprinting fabric is washed with water from high pressure impact showers and flooding showers, and water remaining on the imprinting fabric after the step of washing is removed with a vacuum roll on a sheet side of the imprinting fabric. The system and method does not involve removing water from the fabric with a uhle box on the sheet side of the imprinting fabric.

A method of controlling deposits on papermaking surfaces or fabrics on paper machines includes applying a deposition control solution to the papermaking surfaces or fabrics to inhibit deposition of organic contaminants therein. The deposition control solution comprises at least one cationic polymer, at least one at least one phthalate/glycol or polyethylene terephthalate/polyoxyethylene terephthalate (PET:POET) or polyalkylene terephthalate/polyoxyethylene terephthalate (PAT:POET) based copolymer, and at least one non-ionic surfactant in combination to provide improved deposition control.

A drainage device for removing dirt particles and wastewater from a cleaning head for cleaning a dryer screen of a paper production plant includes an air-water separation container. The air-water separation container includes an air outlet, a wastewater outlet and an inlet opening for receiving the dirt particles and the wastewater from the cleaning head. The air-water separation container is connected to the cleaning head so as to be movable transversely relative to the dryer screen together with the cleaning head.