An installation for forming a fiber preform, includes a follower roller. The follower roller presents a profile in section that has at least a first slope forming an angle with the axis of the follower roller and a second slope forming a second angle with the axis of the follower roller that is different from the first angle. The installation also has at least one backing roller presenting a shape complementary to the first and second slopes, the installation including a holder for holding each backing roller and configured to hold the backing roller at a predetermined distance from the first and second slopes or configured to apply contact pressure from the backing roller against the first and second slopes.

The present invention is directed to a process to produce agglomerated lignin with a controlled particle size distribution. The agglomerated lignin is essentially free of dust so that the risk of dust explosion is greatly reduced.

The invention relates to a device for pressing flat material, comprising means for transporting the flat material (15) in a transport direction and at least one pressing roller pair (9), which is stationary in the transport direction and acts on the flat material (15) on both sides, said device being characterized in that both pressing rollers (13, 14, 29, 34) of the pressing roller pair (9) or both pressing rollers (13, 14, 29, 34) of at least one of the pressing roller pairs (9) are elastically deformable in the radial direction at least at the circumference of said pressing rollers.

The invention provides a multilayer-structure absorbent core for a disposable absorbent article, and a method for preparing the absorbent core, wherein the absorbent core is compacted and formed by each layer; its surface presents a grid-shaped groove; the depth at the intersection point of the grid-shaped groove is bigger than that at the non-intersection point thereof. The invention adopts a new synchronous split-level process; that is, a linear grid-shaped trapezoid-shaped compaction mechanism, of which the height is smaller than that of a circular-platform structure, incompletely compacts the absorbent core and separates the absorbent core into numerous small convex spaces, while a circular-platform structure carries out the dot-shaped compaction for the absorbent core. Under the conditions that the liquid-absorption functions of a deflector layer and a reservoir layer are maintained, the movement of polymer water-absorption material is completely limited while the strength of a core body is enhanced. The invention adjusts the structure of the core body and a process of preparing it, thus facilitating the improved multilayer structure to have more liquid-absorption amount, faster liquid-absorption speed and increased strength.

The invention provides a multilayer-structure absorbent core for a disposable absorbent article, and a method for preparing the absorbent core, wherein the absorbent core is compacted and formed by each layer; its surface presents a grid-shaped groove; the depth at the intersection point of the grid-shaped groove is bigger than that at the non-intersection point thereof. The invention adopts a new synchronous split-level process; that is, a linear grid-shaped trapezoid-shaped compaction mechanism, of which the height is smaller than that of a circular-platform structure, incompletely compacts the absorbent core and separates the absorbent core into numerous small convex spaces, while a circular-platform structure carries out the dot-shaped compaction for the absorbent core. Under the conditions that the liquid-absorption functions of a deflector layer and a reservoir layer are maintained, the movement of polymer water-absorption material is completely limited while the strength of a core body is enhanced. The invention adjusts the structure of the core body and a process of preparing it, thus facilitating the improved multilayer structure to have more liquid-absorption amount, faster liquid-absorption speed and increased strength.

In order for contaminants (50) that are in particular liquid or highly viscous or solid and impact in an operating portion (40b) of one or 2 processing shafts (40.1, 40.2) that rotate adjacent to each other not to reach bearings (2) of the shafts (40.1, 40.2) which are arranged axially outside of the processing portion (40b) which could damage the bearings a wiping device (6) is arranged there between which is additionally axially shielded by a bearing plate (3) and a splash guard plate (4) wherein the wiping device provides that contaminants (50) that reach the wiping section (40a) are wiped off at this location and cannot move further through the bearing plate (3) to the bearing (2) that is arranged outside of the bearing plate (3).

In order for contaminants (50) that are in particular liquid or highly viscous or solid and impact in an operating portion (40b) of one or 2 processing shafts (40.1, 40.2) that rotate adjacent to each other not to reach bearings (2) of the shafts (40.1, 40.2) which are arranged axially outside of the processing portion (40b) which could damage the bearings a wiping device (6) is arranged there between which is additionally axially shielded by a bearing plate (3) and a splash guard plate (4) wherein the wiping device provides that contaminants (50) that reach the wiping section (40a) are wiped off at this location and cannot move further through the bearing plate (3) to the bearing (2) that is arranged outside of the bearing plate (3).

A core compressor is disclosed that includes a housing, a first pair of rollers and a second pair of rollers, both positioned in the housing. Each of the pair of rollers includes an upper roller and a lower roller. The first pair of the rollers is located proximate to a first end of the core compressor, and the second pair of the rollers is located proximate to a second and opposing end of the core compressor. The upper roller and lower roller of the first pair of rollers are located a first distance apart. The upper roller and lower roller of the second pair of rollers are located a second distance apart. Each roller includes at least one row of teeth extending generally perpendicularly away from the surface of the roller.

A core compressor is disclosed that includes a housing, a first pair of rollers and a second pair of rollers, both positioned in the housing. Each of the pair of rollers includes an upper roller and a lower roller. The first pair of the rollers is located proximate to a first end of the core compressor, and the second pair of the rollers is located proximate to a second and opposing end of the core compressor. The upper roller and lower roller of the first pair of rollers are located a first distance apart. The upper roller and lower roller of the second pair of rollers are located a second distance apart. Each roller includes at least one row of teeth extending generally perpendicularly away from the surface of the roller.

An absorbent article and method of making the absorbent article are disclosed. The absorbent article having a topsheet, a backsheet, and an absorbent core structure having one or more layers wherein at least one layer is a heterogeneous mass layer, wherein the topsheet and the heterogeneous mass are integrated such that they reside in the same X-Y plane.