A non-oil-based release aid used in a creping process for releasing a paper web from a Yankee dryer in the manufacture of a paper product having a formula for its block version as follows: where R is a C.sub.8 to C.sub.20 alkyl or alkylaryl group, y plus z is greater than 20, and y is greater than z. The y moles of propylene oxide (OC.sub.3 H.sub.6) and the z moles of ethylene oxide (OC.sub.2 H.sub.4) may be added in random or block fashion. Examples of the chemical compound for the release aid ...

A spunbonded web is produced by melting a thermoplastic polymer to form a melt, spinning the melt downwardly through spinnerets to form filaments, cooling the filaments, drawing the thus cooled filaments by take-off nozzles into the form of filament strands, passing the filament strands through guide tubes and by the guide tubes directing the thus guided filament strands downwardly therefrom toward a laydown apparatus, and laying down the filament strands in the form of a web on the laydown appa...

A process and an apparatus for high-intensity drying of fiber webs or sheets, such as newsprint, printing and writing papers, packaging paper, and paperboard or linerboard, as they are formed on a paper machine. The invention uses direct contact between the wet fiber web or sheet and various molten heat transfer fluids, such as liquified eutectic metal alloys, to impart heat at high rates over prolonged durations, in order to achieve ambient boiling of moisture contained within the web. The molt...

The material web is guided at a predetermined speed over a plurality of needle rollers rotating about their longitudinal axis and arranged transversely to the direction of movement of the material web. The material web covers part of the surface of each of the needle rollers. The circumferential speed of the needle rollers is set relative to the speed of the material web in such a way that the desired amount of needling, with adjustable longitudinal stretching, is obtained.

Process and device for drying paper webs, with the process being utilized for drying voluminous paper webs, destined in particular for use as toilet paper, with at least one heated press being used for drying the wet paper web, with the undesirable delamination of the paper web, when it leaves the compression gap, caused by the sudden expansion of the flash steam, being purposefully used in order to improve the volume and softness of the thus produced paper. Several devices are also set forth fo...

A device for aligning material webs which in a longitudinal direction have alternating regions of differing thickness, has a top and a bottom aligning rail, which are disposed substantially at right angles to the material web and opposite one another with slight clearance. The top aligning rail has a row of aligning elements which are disposed in a longitudinal direction of the aligning rail. They are supported so as to be movable substantially at right angles to the plane of the material web an...

A multi-layered web is produced by providing a first layer comprised of a strip of biaxially oriented polymeric film characterized by an inherent tendency to bend within its own plane. The strip is tensioned so as to overcome the bending tendency and assume a straight orientation. While the strips is held straight, a second layer of material is adhered to the strip. The second layer counteracts the bending tendency of the first layer so that when the tensioning forces are released, the web is st...

An apparatus for transporting a continuous stretchable web wherein the stretchable web is positioned in face-to-face contact with a carrier web, the overlying webs are transported through a printing machine or other apparatus and then moved to a web separator for separating the stretchable web from the carrier web. A spreader means is associated with the separator for imparting a laterally directed spreading force to the stretchable web so that the stretchable web can be collected on a take-up r...

A method of observing a moving web having printed thereon a regularly repeated pattern comprising moving said web past at least two photoelectric cells mounted so as to observe simultaneously or substantially simultaneously a predetermined group of control features on the web, and initiating a cutting and/or controlling operation whenever such observation occurs.

In this machine, tufts of fibers are delivered from a feed section by an air bridge into a generally vertical chute past a rotary feeder condenser on which the fibers are formed into a mat which is carried onto a feed plate over which the mat is fed by a feed roller into a lickerin rotating at high speed. The lickerin, which is vertically below the condenser, combs fibers from the mat. The fibers are doffed from the lickerin through centrifugal force and by an air stream flowing past the lickeri...