Abstract:
The present invention relates to a high speed embossing and adhesive printing process, said process comprising the steps of (a) applying an adhesive to a conformable heated glue application roll; (b) applying said adhesive to a first patterned embossing roll, having an outer surface, which is engaged with a second patterned embossing roll having a complementary pattern to said first embossing roll; (c) passing a web of sheet material between said first and second embossing rolls at a tangential line speed to simultaneously emboss said web and apply said adhesive to said web, such that said adhesive forms an adhesive pattern between embossments; and (d) applying a renewable release agent to the outer surface of the first patterned embossing roll.
Abstract:
Installation for the manufacture of a multi-layer material, particularly for the manufacture of a material using paper webs, comprises a formation station (1) of a first paper web (8) issued from a first paper feeding station, a gluing unit (9), a second paper feeding station producing a second paper web (14) to be laid on the first paper web (8), which have been deformed in the formation station (1), by means of a pressing cylinder (15), a longitudinal cutting station (17), a transverse cutter (22) and a stacking station (29). The formation station (1) produces a structured web (2) comprising alveolar deformations, the structure configuration of said structured web (2), once this one is covered by the second paper web (14), constituting an assembled unit with a mechanical resistance identical in at least two directions.
Abstract:
The present invention provides an integral net having a lattice of polymeric material defined by holes traversing the integral net from one surface to the other. The present invention also provides a method for producing an embossed sheet of polymeric material by first contacting a billet of polymeric material with an embossing tool having a plurality of protrusions whereby the embossing tool impresses indentations into the billet to a given depth. Subsequently, the method involves skiving the embossed billet. By this method, an embossed sheet of the polymeric material is removed from the billet, which embossed sheet can be an integral net.
Abstract:
The embossing process is effected between a pair of embossing rollers provided with toothings of the same kind which comprise rows of pyramidal teeth extending in the axial and the circumferential directions. Compared to the theoretical pyramid shape, the heads of the teeth are flattened while the edges of the pyramids are cut. The rollers, which are mutually displaceable in the axial direction, are thus able to catch in a stable mutual position of maximum penetration and to remain in this position in operation. This allows a safe mutual synchronization of the rollers and an optimal embossing of any kind of materials, especially of paper foils.
Abstract:
A process for producing a structured, voluminous nonwowen comprises the following steps: (a) a spun nonwoven is produced from a plurality of individual filaments which are stretched and gathered into a skein of fibers; (b) the skein is pressed and not-bonded into a crude nonwoven (12) through a first pair of rollers (9a, b); and (c) the crude nonwoven is further processed through a second pair of rollers (10a, b). The process is characterized in that the individual filaments are initially stretched merely up to a range from 50 to 70% of their maximum possible extension, and in that the crude nonwoven (12) is further processed through a pair of rollers (10a, b) composed of a positive roller (10a) with numerous nops or elevations (11) distributed over the outer surface of the roller and of a negative roller (10) with just as numerous recesses or depressions (12). During rolling, the nops engage the recesses and further stretch the crude non-woven in the area of the roller nops.
Abstract:
Webs can be embossed using matched embossing elements with shoulders located off-centered. Such a configuration increases the bulk of the web and maintains the web's strength. The shoulder of one roll is located above or below the embossing surface mid-plane. The shoulder of the second roll substantially matches the off-centered elements of the first roll.
Abstract:
A paper toweling which provides a combination of strength, bulk and absorbency while presenting an attractive appearance. Included are a single ply paper towel having areas of light and heavy embossing perforations which form diamond shaped islands of heavy embossing perforations surrounded by intersecting bands of light bosses.
Abstract:
The crispness or clarity of embossed tissue is improved by embossing the tissue twice in two successive embossing nips formed between a rigid engraved embossing roll and a resilient backing roll. The hardness of the resilient backing roll in the first embossing nip is less than the hardness of the resilient backing roll in the second embossing nip. This form of double nip embossing is particularly effective for embossing tissue webs having high bulk and resiliency, such as soft uncreped throughdried tissues, which cannot be satisfactorily embossed by conventional methods.
Abstract:
Embossing a web between unmatched male and female embossing elements, wherein the sidewall slope of the female element is different than the sidewall slope of the male element, provides an embossed web having markedly improved embossing pattern definition and, in the case of roll products, greater roll bulk at equivalent roll firmness. The unmatched male and female embossing elements are preferably made by laser engraving rubber embossing rolls.
Abstract:
An embossed sanitary paper product and method of making such product. The paper is embossed to form in the paper a midplane and an array of bosses extending up and down from the formed midplane. Each upward extending boss is flanked on two sides, in each of two directions, by a downward extending boss, and in at least one of the two directions, the paper between an upward extending boss tip and an adjacent downward extending boss tip on one side has a higher strain than the paper between the upward extending boss tip and an adjacent downward extending boss tip on the opposite side. The forming of a higher strain region and a lower strain region on opposite sides of a boss can be accomplished by forming asymmetric bosses with each upward extending boss rotated 180.degree. about an axis perpendicular to the plane of the paper with respect to its adjacent downward extending bosses.