Described herein are methods and systems for reducing, preventing, or eliminating wrinkles in a paper sheet during papermaking. The systems may include a dryer configured to dry a continuous paper sheet having a travel direction. The system may also include at least one roll configured to receive the dried continuous paper sheet. The systems may also include an air spreader located downstream of the dryer and upstream of the at least one roll. The at least one roll may include one or more calendering rolls. The air spreader may include a plurality of nozzles configured to expel a gas toward the dried sheet. The nozzles may be oriented in a direction at least partially opposed to the travel direction of the dried sheet.

Methods of making a multi-ply paperboard core include providing a number of paperboard furnishes and layering the furnishes to form a multi-ply paperboard web, wherein the two outermost plies are formed of furnish containing no size and the two plies adjacent the outermost plies are formed of furnish containing size. Apparatus for making a multi-ply paperboard core include two or more furnish sources configured to provide a number of paperboard furnishes, wherein at least one furnish source provides furnish containing no size and at least one furnish source provides furnish containing size, and a paperboard forming section wherein the furnishes are layered to form a multi-ply paperboard web in which the two outermost plies are formed of furnish containing no size and the two plies adjacent the two outermost plies are formed of furnish containing size.

Methods of making a multi-ply paperboard core include providing a number of paperboard furnishes and layering the furnishes to form a multi-ply paperboard web, wherein the two outermost plies are formed of furnish containing no size and the two plies adjacent the outermost plies are formed of furnish containing size. Apparatus for making a multi-ply paperboard core include two or more furnish sources configured to provide a number of paperboard furnishes, wherein at least one furnish source provides furnish containing no size and at least one furnish source provides furnish containing size, and a paperboard forming section wherein the furnishes are layered to form a multi-ply paperboard web in which the two outermost plies are formed of furnish containing no size and the two plies adjacent the two outermost plies are formed of furnish containing size.

An improved processes for making fluff pulp sheets mechanically eliminates many of the unwanted fiber-to-fiber bonding (fiber bundles) which may be contained in the sheet to produce consistent and uniform quality fluff pulp. Pulp slurry is deposited on a moving bottom forming wire to form a stock web. Pulp slurry is brought into contact with a moving top forming wire. The stock web is subjected to up and down dewatering creating separately formed layers to reduce fiber-to-fiber bonding. The stock web can be subjected to strong pulsating shear forces as it is being advanced along the bottom forming wire to break a majority of fiber bundles contained in the web. The pulp slurry can be deposited on the bottom forming wire utilizing a headbox with dilution control to selectively adjust the concentration of the pulp slurry. A shoe press can be used to dewater the web after it is subjected to the pulsating shear forces. The web can be dried utilizing conventional drying equipment, such as cylindrical driers.

An improved processes for making fluff pulp sheets mechanically eliminates many of the unwanted fiber-to-fiber bonding (fiber bundles) which may be contained in the sheet to produce consistent and uniform quality fluff pulp. Pulp slurry is deposited on a moving bottom forming wire to form a stock web. Pulp slurry is brought into contact with a moving top forming wire. The stock web is subjected to up and down dewatering creating separately formed layers to reduce fiber-to-fiber bonding. The stock web can be subjected to strong pulsating shear forces as it is being advanced along the bottom forming wire to break a majority of fiber bundles contained in the web. The pulp slurry can be deposited on the bottom forming wire utilizing a headbox with dilution control to selectively adjust the concentration of the pulp slurry. A shoe press can be used to dewater the web after it is subjected to the pulsating shear forces. The web can be dried utilizing conventional drying equipment, such as cylindrical driers.

The present invention relates to a hyaluronate nonwoven fabric composed of hyaluronate fibers and a manufacturing method therefor, wherein a nonwoven fabric composed of only pure hyaluronate is provided without the addition of any heterogeneous fiber, such as PVA which is a binding fiber essentially added during a wet-laid nonwoven fabric manufacturing process, so that a nonwoven fabric composed of only hyaluronate fibers with excellent human compatibility and without cytotoxicity, skin irritation, and the like can be provided, and thus can be used as patches for cosmetic patches, wet wound dressings, tissue adhesion barrier membranes, and the like.