Abstract: The present invention relates to processes for softening cellulose pulp using chemical softening agents or debonders, which include compositions comprising lower alkyl acid esters or cyclic esters of polyhydroxy compounds, without adversely affecting the absorbency of the cellulose fiber products thereof, and products thereof. The process of the invention may also be used in combination with plasticizing agents for cellulose such as glycerol, mono- and di-saccharides, glycols, and oligomers thereof. The process of the invention provides cellulosic fiber which is easier to fluff (refiberize) and to subsequently densify airlaid pads formed from the resulting individualized fibers, without adversely affecting absorbency.

Abstract: The invention relates to a screen pipe to be used in dry forming of web material in order to distribute fiber material blown into the screen pipe through a jacket (2) of the pipe onto a wire arranged to move under the pipe. The fiber material provided inside the screen pipe is made to move for example by means of a spiked roll placed inside the pipe, so that the movement of the fiber material has both a radial and a tangential component with respect to the jacket (2) of the screen pipe. The jacket comprises on its inner surface profiled grooves (8) in the pipe's axial direction. The edge (8a) of the profiled groove is situated downstream with respect to the tangential component of the fiber flow. The upstream edge (8b) of the groove is positioned downstream with respect to the tangential component of the fiber flow. The bottoms of the profiled grooves comprise holes or slots (9) through which the fibers are discharged from the screen pipe.

Abstract: A package of a strip of material has a plurality of parallel side by side stacks each containing a length of the strip which is folded back and forth such that each folded portion of the stack is folded relative to the next portion about a line transverse to the strip. Preferably, the side edges of the strip portions are aligned. The strip can be continuous through each stack and connected by a splice from the end of one stack to beginning of the next stack. To reduce the height of the stacks, the package is compressed and maintained in the compressed condition by, for example, an evacuated sealed bag. The strip of each stack is formed to have a varying width, for example to form diaper inserts when the strip is cut into individual strip elements. The length of each strip portion of the stack is arranged to equal a whole number of strip elements so that the cut lines can be arranged at the fold lines.

Abstract: A package of strip material includes a plurality of stacks of the strip side by side where each strip forms a stacked fan folded supply of the strip which is spliced to or arranged so that it can be subsequently spliced to a next adjacent strip for supply of a continuous strip from the package. The side by side stacks are simultaneously built up from the bottom by moving a carriage back and forth below a stationary bottom surface of the stacks with the strips supplied side by side through a slot in the carriage. The stacks are supported side by side as they are built up by rigid side walls of a chute or of a box into which the package is to be packaged for transportation. The tails are supported or arranged so that they are ready for splicing when the package is completed an before transportation. The packaging material can be an evacuated bag or a rigid box.

Abstract: A package of strip material includes a plurality of stacks of the strip side by side where each strip forms a stacked fan folded supply of the strip which is spliced to or arranged so that it can be subsequently spliced to a next adjacent strip for supply of a continuous strip from the package. The side by side stacks are simultaneously built up from the bottom by moving a carriage back and forth below a stationary bottom surface of the stacks with the strips supplied side by side through a slot in the carriage. The stacks are supported side by side as they are built up by rigid side walls of a chute or rectangular container into which the package is to be packaged for transportation. Splice tail portions extend from the strips and are supported or arranged so that they are ready for splicing when the package is completed before transportation. Transfer of the completed stacks is effected simultaneously by a slip sheet arrangement or by moving one of the belts of the carriage as an ejection belt.

Abstract: A package has at least one stack of a strip of material repeatedly folded back and forth so that the stack contains a plurality of folded overlying strip portions of the strip. Each strip portion is folded relative to one next adjacent strip portion about a first fold line transverse to the strip and relative to a second next adjacent strip portion about a second fold line transverse to the strip and spaced from the first fold line. The strip portions form a plurality of first fold lines at each end of the stack. The stack can be arranged substantially upright and has a splice tail portion of the strip extending from the bottom strip portion beyond an end of the stack to be accessible for splicing. The entire top surface and the entire bottom surface of the stack is compressed from an external force in a direction at right angles to the top surface and the bottom surface of the stack. The stack is engaged by packaging which maintains the compression.

Abstract: The invention relates to a distribution unit to be used in dry forming of web material, the distribution unit comprising one or more screen pipes (1) into which a fiber material (3) intended for forming a web is blown, the fibers penetrating through jackets (2) of the screen pipes in order to be layered onto a wire, and the screen pipe(s) (1) being arranged to extend transversely over the wire; and a rotatable brush roller (4) arranged inside each screen pipe (1) in the axial direction thereof. In the invention, a blade wheel (5) is provided inside each screen pipe (1) near the end that is opposite to the end where the fiber material (3) is blown into the pipe, the blade wheel being arranged to blow in a direction opposite to the direction of flow (A) of the fiber material.

Abstract: The present invention provides a unitary multi-layer filtering material and a method for producing a multi-layer filtering material. The multi-layer filtering material comprises at least one filtering layer formed by a dry forming technique and comprises natural fibers and/or plastic fibers and a binder material and/or binder fibers. The multi-layer filtering material further comprises at least one strengthening layer formed by a dry forming technique and comprises natural fibers and/or plastic fibers and binder material and/or binder fibers. The strengthening layer is airlaid onto either side of the filtering layer. The fibers of the filtering and strengthening layers are heat bonded to form a unity.

Abstract: The present invention is directed to a hydrogel-forming polymeric material including a first compound which is a superabsorbent polymer and a second compound present in the first as a dispersed phase including an elastomeric material effective to increase the fracture resistance of the superabsorbent. The material is prepared from a first compound including carboxylic-functional polyelectrolytes in combination with a crosslinkers reactive with carboxyl or carboxylate groups and an effective amount of a second compound including an aqueous dispersion of a rubbery material. In one preferred embodiment, the fracture resistant polymer is prepared from monomer/crosslinker solution mixed with latex.

Abstract: The present invention relates to processes for softening cellulose pulp using chemical softening agents or debonders, which include compositions comprising lower alkyl acid esters or cyclic esters of polyhydroxy compounds, without adversely affecting the absorbency of the cellulose fiber products thereof, and products thereof. The process of the invention may also be used in combination with plasticizing agents for cellulose such as glycerol, mono- and di-saccharides, glycols, and oligomers thereof. The process of the invention provides cellulosic fiber which is easier to fluff (refiberize) and to subsequently densify airlaid pads formed from the resulting individualized fibers, without adversely affecting absorbency.

Abstract: Disclosed is a unitary absorbent core having a basis weight of about 75 grams per square meter or greater, including a fibrous absorbent layer having an upper fluid receiving surface and a lower surface with a hydrophobic vapor-transmissive moisture barrier integral with the lower surface of the absorbent layer. Also disclosed is a process for the production of the unitary absorbent core, including the steps of (a) producing a fibrous absorbent layer having upper and lower surfaces, and (b) applying to the lower surface of the fibrous absorbent layer a hydrophobic material which at least partially coats at least some of the fibers of the lower surface of the absorbent layer.

Abstract: A method is provided for forming a package of a plurality of side-by-side stacks of continuous strips of material in a rectangular container. Each strip is folded back and forth about first and second fold lines to form a stack of a plurality of folded overlying strip portions which are arranged side-by-side so that the side edges are aligned. The fold lines are transverse to the strip and arranged at opposite ends of the stack. A splice tail portion extending from a first strip end portion of each stack is spliced to a second strip end portion. The stacks are compressed such that their height is equal to that of the container and the splice tail portions remain loose and uncompressed.

Abstract: A package has at least one stack of a strip of material repeatedly folded back and forth so that the stack contains a plurality of folded overlying strip portions of the strip. Each strip portion is folded relative to one next adjacent strip portion about a first fold line transverse to the strip and relative to a second next adjacent strip portion about a second fold line transverse to the strip and spaced from the first fold line. The strip portions form a plurality of first fold lines at each end of the stack. The stack can be arranged substantially upright and has a splice tail portion of the strip extending from the bottom strip portion beyond an end of the stack to be accessible for splicing. The entire top surface and the entire bottom surface of the stack is compressed from an external force in a direction at right angles to the top surface and the bottom surface of the stack. The stack is engaged by packaging which maintains the compression.

Abstract: A method is provided for forming a package of a plurality of side-by-side stacks of continuous strips of material without intervening rigid container walls. Each strip is folded back and forth about first and second fold lines to form a stack of a plurality of folded overlying strip portions. The fold lines are transverse to the strip and arranged at opposite ends of the stack. The strip portions of each stack are arranged side-by-side so that the side edges are aligned. The strips are fed simultaneously through a guide slot in a movable carriage that is parallel to the stacks end upon which the stacks are arranged.

Abstract: A package of a continuous strip of material includes a plurality of parallel side by side stacks each containing a length of the strip which is folded back and forth such that each folded portion of the stack is folded relative to the next portion about a line transverse to the strip and such that the side edges of the strip portions are aligned. The strip of material includes a splice defined by the two ends of the strip. The two ends of the strip are held together by yarn stitches passing through and bridging the strip ends.

Abstract: A package of a continuous strip of material comprises a plurality of parallel side by side stacks each containing a length of the strip which is folded back and forth such that each folded portion of the stack is folded relative to the next portion about a line transverse to the strip and such that the side edges of the strip portions are aligned. The strip is continuous through each stack and is connected by a splice from the end of one stack to beginning of the next stack. The package is compressed to reduce the height of the stacks and maintained in the compressed condition by an evacuated sealed bag. The preferred package arrangement uses the package for pay off of the strip in the orientation in which it is formed with the bottom of the stacks resting on a support and the package tilted to one side so that the stacks lean against a support surface for stability.