The invention relates to a system of producing MFC (micro fibrillated cellulose) having a process device (30) of a pulper, a refiner or a screen configured to process MFC suspension to consistency of 0.5-5%. The system has a continuous pressing means (15; 25, 26) configured to dry the MFC suspension to a consistency of 6-60%. A method of producing MFC has at least one process stage (30) which processes a MFC suspension to a consistency of 0.5-5% by a process device (30). In the process stage the MFC suspension is pulped in a pulping stage in a pulper and/or refined in a refining stage by a refiner and/or screened in a screening stage by a screen. The MFC suspension having the consistency of 0.5-5% is dried in a drying stage of continuous pressing (15, 25, 26) by continuous a pressing device (15, 25, 26) to a consistency of 6-60%.

A sheet manufacturing apparatus of the present invention includes a defibrating unit that defibrates a material containing fibers into a defibrated material, and a deposition unit that deposits a defibrated material defibrated by the defibrating unit. The deposition unit includes a material supply port through which the defibrated material from the defibrating unit is supplied, a plurality of opening ports through which the supplied defibrated material passes, and a dwell area disposed between the material supply port and the opening ports so that the defibrated material temporarily dwells in the dwell area. The dwell area allows the defibrated material to temporarily dwell in the dwell area so that a variation amount of the defibrated material that passes through the opening ports becomes smaller than a variation amount of the defibrated material supplied through the material supply port.

A sheet manufacturing apparatus of the present invention includes a defibrating unit that defibrates a material containing fibers into a defibrated material, and a deposition unit that deposits a defibrated material defibrated by the defibrating unit. The deposition unit includes a material supply port through which the defibrated material from the defibrating unit is supplied, a plurality of opening ports through which the supplied defibrated material passes, and a dwell area disposed between the material supply port and the opening ports so that the defibrated material temporarily dwells in the dwell area. The dwell area allows the defibrated material to temporarily dwell in the dwell area so that a variation amount of the defibrated material that passes through the opening ports becomes smaller than a variation amount of the defibrated material supplied through the material supply port.

A method of forming a fiber body includes defibrating a raw material in air to provide fibers; depositing the fibers in air onto a belt; applying pressure to the deposited fibers to form a pressurized web; and applying a liquid containing an additive to two surfaces of the pressurized web.

A buffer material of the present disclosure is a buffer material including cellulose fibers, and a binding material that binds the cellulose fibers, in which the binding material contains starch and natural wax. A method of producing a buffer material of the present disclosure is a method including a defibration step of defibrating a raw material containing cellulose fibers by dry type defibration, a mixing step of mixing the cellulose fibers defibrated in the defibration step with a binding material in a gas phase to obtain a mixture, a molding step of compressing the mixture to form a sheet, and a lamination step of laminating a plurality of the sheets to form a buffer material, in which starch and natural wax are used as the binding material.

A method for producing a shaped article includes a second web forming step, in which a mixture containing fibers and a binding material is deposited in the air, the binding material containing starch and an alkali metal salt; a moistening step, in which the mixture is supplied with water; and a sheet-forming step, in which heat and pressure are applied to the mixture supplied with water to give a sheet. The alkali metal salt content of the binding material is 2.0% by mass or less of the total mass of the starch.

A device and a method for the production of a fiber mat is suitable in particular for use in the production of packaging board or fibrous construction elements, from a fibrous source material. The method includes providing the fibrous source material, low-water processing of the fibrous source material in an airflow into raw material including individual fibers and/or fiber bundles, forming of the individual fibers and/or fiber bundles in the airflow by a dry forming method into a fiber mat in such a way that a spatial or three-dimensional structure is formed by the fiber mat and consolidation of the formed fiber mat. The specific volume of the fiber mat is greater than 1.6 cm.sup.3/g, in particular greater than 2 cm.sup.3/g, preferably greater than 3 cm.sup.3/g, and the fiber mat thickness ≥1 mm, in particular ≥1.5 mm, preferably ≥2 mm.

A device and a method for the production of a fiber mat is suitable in particular for use in the production of packaging board or fibrous construction elements, from a fibrous source material. The method includes providing the fibrous source material, low-water processing of the fibrous source material in an airflow into raw material including individual fibers and/or fiber bundles, forming of the individual fibers and/or fiber bundles in the airflow by a dry forming method into a fiber mat in such a way that a spatial or three-dimensional structure is formed by the fiber mat and consolidation of the formed fiber mat. The specific volume of the fiber mat is greater than 1.6 cm.sup.3/g, in particular greater than 2 cm.sup.3/g, preferably greater than 3 cm.sup.3/g, and the fiber mat thickness ≥1 mm, in particular ≥1.5 mm, preferably ≥2 mm.

A machine or apparatus for producing structured tissue or towel using a press section.

A machine or apparatus for producing structured tissue or towel using a press section.