EP0077005B1 - Trockengelegte gemusterte Faserbahnprodukte mit erhöhter Saugfähigkeit - Google Patents

Trockengelegte gemusterte Faserbahnprodukte mit erhöhter Saugfähigkeit Download PDF

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Publication number
EP0077005B1
EP0077005B1 EP82109199A EP82109199A EP0077005B1 EP 0077005 B1 EP0077005 B1 EP 0077005B1 EP 82109199 A EP82109199 A EP 82109199A EP 82109199 A EP82109199 A EP 82109199A EP 0077005 B1 EP0077005 B1 EP 0077005B1
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EP
European Patent Office
Prior art keywords
web
compacted
imprinting
product
imprinted
Prior art date
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Expired
Application number
EP82109199A
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English (en)
French (fr)
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EP0077005A1 (de
Inventor
Michael P. Bouchette
Johannes A. Van Den Akker
William R. Watt
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Fort James Corp
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James River Dixie Northern Inc
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Publication date
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Priority to AT82109199T priority Critical patent/ATE22713T1/de
Publication of EP0077005A1 publication Critical patent/EP0077005A1/de
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Publication of EP0077005B1 publication Critical patent/EP0077005B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/26—Special paper or cardboard manufactured by dry method; Apparatus or processes for forming webs by dry method from mainly short-fibre or particle material, e.g. paper pulp
    • D21H5/265—Treatment of the formed web
    • D21H5/2657—Consolidation
    • D21H5/2671—Compression of the web, optionally with the use of a binder
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/02—Patterned paper

Definitions

  • the present invention relates to a dry-laid fibrous web product of high bulk and enhanced absorbency rate comprising: (a) a web of randomly distributed wood pulp fibers; (b) an adhesive material substantially permeating said web, adjacent fibers being bonded to one another thereby, and (c) an imprinted pattern on at least one surface of said web, the pattern subdividing said surface into compacted regions and non-compacted regions in alternating relationship to one another, the area of the compacted regions being about 40% to about 80% of each imprinted surface and a method of making a dry-laid fibrous web product.
  • the invention relates especially to tissue, towel and napkin products of high bulk and rapid absorbency obtained from bonded air laid cellulosic fibrous webs, in accordance with the method disclosed here.
  • a non-nesting pattern is imprinted on the web to prevent loss of final product size, e.g., product roll diameter.
  • Fibrous webs particularly low basis weight webs between 3,6 and 27,2 kg per 279 m 2 (8 and 60 lbs. per ream (3,000 sq. ft.)), for use ultimately as tissue, towel and napkin products, are fabricated conventionally by two alternate processes.
  • the older wet laid process dispenses an aqueous slurry of pulped paper-making fibers, generally natural cellulose fibers, onto a moving foraminous support means, e.g., a fourdrinier wire, the aqueous medium being removed through the support means by vacuum means.
  • the wet laid web is thermally dried and taken up on a parent roll. Because of the presence of water, the wet laid fibers bond naturally to one another by means of hydrogen bonding.
  • Such conventionally prepared webs are sometimes creped to improve feel and enhance absorbency.
  • the webs may be embossed to enhance softness and to provide a more aesthetic appearance.
  • the second, now conventional, yet relatively recent, process defiberizes cellulose pulp, the dry individual fibers being pneumatically transported to the dispensing means, and then dry laid (or air laid) onto the moving foraminous support means. Vacuum means below the support means is employed to ensure that the dry fibers remain on the web, which web has little inherent strength inasmuch as hydrogen bonds are not formed substantially in the absence of an aqueous medium.
  • the dry, initially laid web is then sprayed with a synthetic bonding agent, such as a latex emulsion, preferably on both surfaces of the web.
  • the bonding agent is cured by passing the thus treated web through a dryer, e.g. a through air dryer, before being taken up on a parent roll. These webs may also be creped and embossed.
  • wet laid webs provide better wiping absorbency than dry laid webs. That is, under dynamic conditions of use, wet laid webs absorb liquid at a faster rate and retain the liquid thus absorbed better than their dry laid. counterpart.
  • the slower rate of wiping absorbency associated with dry laid webs is primarily due to the greater volume of interstitial voids, existing within the reticulated structure of these webs.
  • the greater void volume is occasioned by the larger size, on average, of individual pores, as well as by the greater degree of reticulation extent in the overall web structure.
  • These interstitial voids provide a greater interstitial liquid holding capacity under static conditions, but permit absorbed liquid to be squeezed back out more easily under dynamic wiping conditions. The net result is an appeared slower rate of wiping absorbency for dry laid webs.
  • the advantages of greater void volume or bulk present in dry laid webs are several. Less fiber per ream is required to fabricate the web.
  • the greater void size provides greater static liquid holding capacity, and typically contributes to a softer feeling web.
  • dried laid webs have greater wet strength than conventional wet laid webs, and hence, do not break apart as readily during use. Thus, substantial improvement in wiping or dynamic absorbency characteristics would greatly improve product acceptance and usefulness.
  • a raised pattern is formed on a portion of a first web surface (the raised portion), with corresponding depressions in the remaining portion of said web surface (the depressed portion).
  • These discontinuities in the first surface of the web are occasioned by passing the web between two cylindrical rolls, one of which is resilient, the other being inextensible and having a plurality of bosses thereon.
  • the bosses contact the second surface of the web forming the raised areas (and depressions) on the first surface in contact with the resilient roll.
  • the raises comprise about 20 to 30% of the total first surface area, the depressions accounting for the remaining area.
  • U.S. Patent 3616157 discloses an embossed non-woven fabric having a textured character and fabric-like qualities of softness and hand and suitable for wiping surfaces comprising a fibrous web containing at least one layer of overlapping, intersecting fibers, a pattern of intermittently spaced, embossed compacted fibrous areas lying in the planes of both surfaces of said web of overlapping, intersecting fibers and a pattern of unembossed, uncompacted fibrous portions lying between said planes and connecting said embossed, compacted fibrous areas.
  • U.S. Patent 4135024 discloses a method of simultaneously strengthening and decorating a low integrity dry-formed nonwoven fibrous web, said method comprising the steps of: (a) forming spaced-apart densified regions in the web to strengthen the web by embossing a front surface of the web with spaced-apart raised surfaces of an embossing roll, the densified regions being able to transmit a treating fluid completely through the thickness of the web from a rear surface of the web to the front surface thereof, and simultaneous with the embossing; (b) applying a treating fluid that includes a coloring agent to the rear surface of the web from a treating fluid conveying surface that is free of raised, spaced-apart web embossing areas for causing the fluid to be transmitted completely through the thickness of the web from the rear surface to the front surface thereof in substantially only the densified regions to thereby impart a valley print decorative effect in the front surface, the treating fluid conveying surface being disposed opposite the raised surfaces on the embossing roll and constituting
  • Imprinting compresses certain portions of a web surface in intaglio, the other surface not being raised thereby. Necessarily, imprinting densifies the compressed surface portions substantially more than embossing.
  • Imprinting as opposed to embossing, has heretofore been used in wet laid processing in conjunction with subsequent creping as disclosed in, for example, U.S. Patents 4,191,609 and 4,125,659. In doing so the finally creped product exhibits greater softness, improved stretch and tensile strength, and enhanced bulk.
  • Another object of the present invention is to provide a method for the manufacture of the web product of the present invention.
  • an air laid bonded web is imprinted with a depressed design, preferably with a non-nesting pattern to avoid loss of final product roll diameter.
  • the bonded web to be imprinted is wetted optionally with a spray of water and subjected to an areal pressure of at least about 1,10.10 5 Pa (16 Ibs./in 2 ) by platen means, said means having been heated to a temperature of between about 140 to about 180°C.
  • platen means said means having been heated to a temperature of between about 140 to about 180°C.
  • At least one surface of the treated web must have a compacted area of at least about 40% of the total imprinted surface area, preferably between 50% to 80% of the total imprinted surface area. Each side of the web may be so imprinted.
  • the imprinting means is a pair of non-resilient cylindrical rolls adapted for imprinting the web continuously. While the levels of compaction are analogous, the applied pressure is at least 45,3 kg per lineal 2,54 cm (100 lbs. per lineal inch). Again, the imprinting means are heated to 140 to 180°C., and a water spray is optional.
  • the diameter of individual product rolls or the composite thickness of packaged product sheets of the present invention are preferably reduced not more than 10% as compared to unimprinted products. Depending on the pressure applied by the imprinting means, said reduction may approach between 20 and 30%. However, the wiping absorbency of products of the present invention is increased by at least about 25%, preferably about 40% or more, as ascertained by relative values of mirror wipe time between imprinted and unimprinted products.
  • a flow diagram of a process for making air laid webs, pulp sheets, laps or bales 10 are defiberized in defiberizer 11, here a hammermill, and transported pneumatically through line 12 to a distributor 14 by blower 13.
  • defiberizer 11 here a hammermill
  • Distributor arangements are well known in the art.
  • the individual fibers are dispersed onto an endless fourdrinier wire 15, which circles continuously about guide rolls 16.
  • Vacuum means 17 draws and retains the loose fibers 18 onto the wire 15 to form a loose web 19 which has little integrity.
  • the loose web 19 is typically pressed by consolidation rolls 21, which compaction increases web strength to a limited extent, and permits transfer of the pressed web 22 to a carrier wire 23.
  • Wire 23 has larger perforations than wire 15 and is made typically from a synthetic plastic material. The use of a separate wire 23, then, is less likely to cause plugging with bonding material 26 from spray dispensing means 27, and will improve clean up. As shown in Fig.
  • the once bonded web 29, partially dried in dryer 28, is transferred from carrier wire 23 to a second carrier wire 31 where a second spray means 33 dispenses additional bonding material 32 onto the second surface of the web. While two bonding applications are shown, one application will suffice where the web is porous and has a low basis weight, e.g., less than about 9,1 kg per 279 m 2 (20 lbs. per 3000 sq. ft. ream). Additional information relating to a preferred process for bonding air laid webs is disclosed in commonly assigned U.S. Patent 4292271 entitled “Methods of Applying Bonding Materials Onto Fibrous Webs", filed December 28, 1979 by Pauls et al. After each bonding application, the web is at least partially cured in dryers 28, 35. If complete drying is not achieved in dryer 35, a curing oven 40 is provided.
  • the bonded, cured web 39, and before take up on parent roll 41, is then imprinted at an imprinting station, here a pair of cylindrical rolls 42, although this location is not' critical.
  • station 42 can be situated between consolidation rolls 21 and bonding station 27, or between dryer 28 and bonding station 33.
  • the imprinting station may be located anywhere following the consolidation rolls 21. It should be noted that when the web is imprinted before the curing step, the compressive force applied by the imprinting means need not be as high as post curing imprinting because the pattern is less likely to "spring back".
  • station 42 may be included as a step in the converting operation (not shown), either from parent rolls or individual product rolls.
  • This failing of prior art products is attributed to the inherently large pore volume between fibers in air laid webs.
  • wet laid webs begin to bond as soon as they are laid.
  • the high moisture content of the wet laid web which decreases from about 99% per weight water beneath the head box to between about 65% to 85% just prior to consolidation, facilitates densification of the web.
  • the water "lubricates” the web and "plasticizes" the fibers so that the individual fibers can come into close physical relationship with one another.
  • Air laid webs do not have water to lubricate the fibers, resulting in less dense webs with greater bulk and larger interstitial void volumes. While bulk is highly advantageous, the consequences of excessively large void volume are not. Compaction by the vacuum means 17 and the consolidation rolls 21 is not intended to highly densify the webs. Although it would be possible to increase the pressure of the consolidation rolls to highly compact the webs, the beneficial bulk provided by the air laid process would be lost. Furthermore, densification of the web by the consolidation rolls 21 would compromise the ability to disperse bonding agent 26, 32 through the web.
  • the invention disclosed herein can be used with air laid webs of between about 3,6 and 27,2 kg per 279 m 2 (8 and 60 Ibs. per ream (3000 sq. ft.)) basis weight which have been consolidated by rolls 21 with pressures of between 22,7 and 135,9 kg/lineal 2,54 cm (50 and 300 lbs./lineal inch.) and then bonded with a latex emulsion bonding agent, the bonding agent typically representing between about 10 to 30%, preferably between 15 and 25%, of the web basis weight.
  • such webs have a bulk of between 1,78.10- 2 to about .
  • MTT mirror wipe time
  • test is being used herein to determine gross differences in absorbency rate so that the standard deviations of individual measurements are negligible by comparison.
  • Caliper was measured with a Testing Machines, Inc. (Amityville, New York) Model 551M Micrometer having a 5,08 cm (2 inch) anvil.
  • Fig. 3 and 4 are photomicrographs of a conventional uncompacted air laid web and a compacted air laid web, respectively, each enlarged 74 times.
  • the densified web of Fig. 4 has much smaller interstitial voids between fibers as compared to the uncompacted web.
  • capillary tension and wiping absorbency is increased in the web of Fig. 4 web as demonstrated by reduction in mirror wipe time.
  • a significant loss in caliper occurs as a consequence of the compaction. This loss is more than about 80% in each instance.
  • a web 50 representative of the invention was prepared using a pair of etched plates each having raised areas representing 69% of the plate.
  • the web so treated had a grid pattern illustrated in Fig. 2.
  • the compacted areas 51 were about 2,02 cm 2 (5/16 inch square) (dimension x) and the non-compacted surfaces 52, e.g., the essentially uncompacted zones which appear as intersecting ribs or bridge regions, were about 0,16 cm (1/16") wide (dimension y).
  • the depth of the compacted areas is dependent upon the pressure applied by the plates.
  • the uncompacted web (Table I) had a basis weight of 19,5 kg/279 m 2 (43 lbs./ream), and a caliper of 1,13 mm (44.6 mils).
  • the imprinting of the web does not reduce the caliper of the non-compacted portions of the web, that is, dimension C i , remains about 1,12 mm (44 mils). However, some reduction occurs, typically less than about 10%, but possibly approaching 20 to 30%. A compression load of about seven tons was applied between the plates for about 20 seconds.
  • the caliper C, of the imprinted web was measured as 0,79 mm (31 mils) with the Model 551 M Micrometer, as compared to 1,13 mm (44.6 mils) for the uncompacted web and as compared to less than 0,23 mm (9.04 mils) for the compacted webs.
  • the loss in caliper is about 30% versus about at least 80% for the totally compacted webs.
  • the caliper of the imprinted web is about 30% greater.
  • Mirror wipe time for the imprinted web was measured at 17 seconds, which is an improvement of 46.9% over the conventional dry laid web.
  • the actual pattern is not critical, it is essential that at least 40%, preferably more than 50%, of the area of one web surface be compacted. If both surfaces of web are compacted, each should be compacted to at least 40%, each preferably more than 50%.
  • the plates or cylinders are heated to between 140 and 180°C., with water sprayed on the towel before pressing. The spray of water is not critical to the process, but it does aid in retention of the compaction.
  • the grid pattern of Fig. 2 is not critical to the concept of improved web absorbency rate by high compaction imprinting, the grid pattern does affect the end product beneficially in that the grid pattern prevents nesting of the compacted zones within one another when the web is taken up on a product roll.
  • the roll of the invention web has essentially the same diameter as conventional products, which is preferred.
  • Fig. 6 illustrates an alternate embodiment of the web of the present invention. Although only one surface has received an imprinted pattern, both surfaces may be imprinted if desired.
  • web 60 has compacted area 61 and a plurality of non-compacted areas.
  • the web of Fig. 6 has contiguous compacted channel regions 61, which regions likewise represent at least 40% of the surface of the web so imprinted.
  • densified zones here indicated by numeral 63, exist beneath the compacted area 61. These contiguous channel regions are desirable because they provided pathways for lateral wicking.
  • Fig. 5 The data of Table I is reproduced graphically in Fig. 5.
  • This graph a plot of compacted web density versus Mirror Wipe Time, shows that the improvement in MWT is rapid until a density of about 0.35 g/cm 3 is achieved, which value corresponds to a compression force of about 1,0.10 5 Pa (15 Ibs./in. 2 ). Thereafter, MWT increases slightly, an asymptote being reached at about 0.80 g/cm 3. It is believed that analogous relationships between MWT and web density are applicable to the product of this invention.
  • the reduction in absorbency at the higher density values in Fig. 5 apparently occurs because the interstitial voids are too small to permit large amounts of water to be absorbed.
  • the densities of the densified web region are between about 0.20 to about 0.50 g/cm 3 , which would correspond roughly to MWT's below 14 and 13 seconds, respectively, for the webs of this invention. It should be noted that the optical density of 0.35 g/cm 3 provides essentially equal absorbency as compared to conventional wet laid webs, that is, an MWT of about 11.5 seconds.

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  • Paper (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Nonwoven Fabrics (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Decoration Of Textiles (AREA)

Claims (25)

1. Trockengelegtes Faserbahnprodukt mit hoher Masse bzw. hohem Volumen und erhöhter Saugfähigkeitsrate, umfassend
(a) eine Bahn aus zufällig verteilten Holzpulpefasern,
(b) einen Klebstoff, der im wesentlichen in die Bahn eindringt, wodurch benachbarte Fasern miteinander verbunden werden, und
(c) ein geprägtes bzw. aufgedrücktes Muster auf wenigstens einer Oberfläche der Bahn, wobei das Muster die Oberfläche in verdichtete Bereiche und unverdichtete Bereiche in Wechselbeziehung zueinander unterteilt und die Fläche der verdichteten Bereiche etwa 40 bis etwa 80% jeder geprägten Oberfläche ausmacht,

dadurch gekennzeichnet, daß die Teile der Bahn, die unter den verdichteten Bereichen liegen, eine Dichte im Bereich von etwa 0,2 g/cm3 bis etwa 0,5 g/cm3 besitzen.
2. Produkt nach Anspruch 1, dadurch gekennzeichnet, daß die verdichteten Bereich vorzugsweise zwischen 50 und 70% jeder geprägten Oberfläche ausmachen.
3. Produkt nach Anspruch 2, dadurch gekennzeichnet, daß das Muster die Form eines Gitters besitzt, welches eine Mehrzahl von diskontinuierlichen, verdichteten Bereichen und angrenzende, unverdichtete Brückenbereiche umfaßt.
4. Produkt nach Anspruch 3, dadurch gekennzeichnet, daß jeder verdichtete Bereich eine Fläche zwischen etwa 0,323 bis 3,626 cm2 (0,05 bis 0,562 in.) besitzt und die Brückenbereiche eine Breite zwischen etwa 0,127 bis 0,254 cm (0,05 bis 0,10 inch) besitzen.
5. Produkt nach Anspruch 2, dadurch gekennzeichnet, daß das Muster die Form eines Gitters besitzt, welches eine Mehrzahl von diskontinuierlichen, unverdichteten Bereichen und angrenzende verdichtete Kanalbereiche umfaßt.
6. Produkt nach Anspruch 5, dadurch gekennzeichnet, daß jeder unverdichtete Bereich eine Fläche zwischen etwa 0,516 bis 1,613 cm2 (0,08 bis 0,25 in.) besitzt und die Kanalbereiche eine Breite zwischen etwa 0,381 bis 0,914 cm (0,15 bis 0,36 inch) besitzen.
7. Produkt nach Anspruch 3 oder 5, dadurch gekennzeichnet, daß die Saugfähigkeitsrate, gemessen durch die Spiegelwischzeit (MWT), welche die Zeit ist, die zur Entfernung von Wasser bei Druckanwendung mit der Hand auf einen ebenen Spiegel benötigt wird, um wenigstens 25%, verglichen mit entsprechenden ungeprägten Bahnprodukten, verringert wird.
8. Produkt nach Anspruch 7, dadurch gekennzeichnet, daß die verdichteten Bahnteile vorzugsweise eine Dichte der verdichteten Fläche von etwa 0,2 bis etwa 0,5 glcm3 besitzen.
9. Produkt nach Anspruch 8, dadurch gekennzeichnet, daß die Saugfähigkeitsrate, gemessen durch die Spiegelwischzeit (MWT), welche die Zeit ist, die zur Enfernung von Wasser bei Druckanwendung mit der Hand auf einen flachen Spiegel benötigt wird, um wenigstens 40%, verglichen mit entsprechenden ungeprägten Bahnprodukten, verringert wird.
10. Produkt nach Anspruch 8, dadurch gekennzeichnet, daß die Saugfähigkeitsrate, gemessen durch die Spiegelwischzeit (MWT), welche die Zeit ist, die zur Entfernung von Wasser bei Druckanwendung mit der Hand auf einen ebenen Spiegel benötigt wird, weniger als etwa 15 s beträgt.
11. Produkt nach den Ansprüchen 1, 3 oder 5, dadurch gekennzeichnet, daß jede Oberfläche der Bahn geprägt ist.
12. Verfahren zur Herstellung eines trockengelegten Faserbahnprodukts, welches
(a) das zufällige Verteilen von trockenen Fasern auf einer sich bewegenden mit Öffnungen versehenen Trägereinrichtung, um eine trockene, lose Bahn zur Verfügung zu stellen,
(b) das Binden der Bahn mit einem Klebstoff, wobei der Klebstoff im wesentlichen in die Bahn eindringt,
(c) das Härten des Klebstoffs vor der Aufnahme der gehärteten Bahn auf einer Stamm- bzw. Grundrolle, und
(d) das Prägen wenigstens einer Oberfläche der Bahn, wobei die geprägte Bahnoberfläche ein Muster besitzt, das durch eine verdichtete Fläche von wenigstens 40% des insgesamt geprägten Oberflächenbereichs gekennzeichnet ist, umfaßt, dadurch gekennzeichnet,

daß die trockene, lose Bahn zwischen der Stufe (a) und (b) verfestigt wird und das Prägen in einer beliebigen Verfahrensstufe nach der Verfestigung der trockenen, losen Bahl bei einem Druck, welcher ausreichend ist, um die Teile der Bahn, die unter den verdichteten Flächen liegen, auf eine Dichte im Bereich von etwa 0,2 g/cm3 bis etwa 0,5 g/cm3 zu verdichten, durchgeführt wird.
13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß die Prägeeinrichtung ein Tiegel- bzw. Etagenpresserpaar ist, der Druck wenigstens 1,Ox105 Pa (161bslin.) beträgt und das es weiterhin eine Stufe umfaßt, bei der die Bahn zuerst mit einem Wasserspray benetzt wird, wobei die Prägestufe weiterhin dadurch gekennzeichnet ist, daß die Prägeeinrichtungen auf eine Temperarur zwischen etwa 140 bis etwa 180°C erwärmt werden.
14. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß die Prägeeinrichtung ein Paar von zylindrischen Rollen ist, wobei der Druck wenigstens 45,3 kg pro laufenden (lineal) 2,54 cm (100 Ibs pro laufenden inch) ist.
15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, daß die verdichtete Fläche vorzugsweise mehr als 50% der insgesamt geprägten Oberfläche ausmacht.
16. Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß die Saugfähigkeitsrate, gemessen durch die Spiegelwischzeit (MWT), welche die Zeit ist, die zur Entfernung von Wasser bei Druckanwendung mit der Hand auf einen ebenen Spiegel benötigt wird, um wenigstens 25%, verglichen mit entsprechenden ungeprägten Bahnprodukten, verringert wird.
17. Verfahren nach Anspruch 16, dadurch gekennzeichnet, daß der durch die Prägeeinrichtung auf die Bahn angewandte Druck vorzugsweise etwa 45,3 bis etwa 226,5 kg pro laufenden (lineal) 2,54 cm (100 bis 500 lbs/ laufenden in.) beträgt.
18. Verfahren nach den Ansprüchen 12, 14 oder 17, dadurch gekennzeichnet, daß es weiterhin eine Stufe umfaßt, bei der die Bahn zuerst mit einem Wasserspray benetzt wird und die Prägestufe weiterhin dadurch gekennzeichnet ist, daß die Prägeeinrichtung auf eine Temperatur zwischen etwa 140 bis etwa 180°C erwärmt werden.
19. Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß es weiterhin eine Stufe der Umwandlung der Grund- bzw. Stammrolle in Produktrollen umfaßt.
20. Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß das Prägen zwischen den Stufen (a) und (b) stattfindet.
21. Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß das Prägen zwischen den Stufen (b) und (c) stattfindet.
22. Verfahren nach Anspruch 21, dadurch gekennzeichnet, daß die Bindungsstufe (b) die folgenden Stufen umfaßt:
(i) Aufbringen eines ersten Auftrags des Klebstoffs auf eine Bahnoberfläche,
(ii) teilweises Trocknen des ersten Auftrags des Klebstoffs,
(iii) Aufbringen eines zweiten Auftrags des Klebstoffs auf die ander Oberfläche, und
(iv) teilweises Trocknen des zweiten Auftrags des Klebstoffs, wobei die Prägestufe nach jeder Trocknung durchgeführt wird.
23. Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß das Prägen nach dem Härten stattfindet.
24. Verfahren nach Anspruch 19, dadurch gekennzeichnet, daß das Prägen während der Umwandlung stattfindet.
25. Verfahren nach den Ansprüchen 12, 16, 18 oder 22, dadurch gekennzeichnet, daß jede Bahnoberfläche geprägt wird.
EP82109199A 1981-10-05 1982-10-05 Trockengelegte gemusterte Faserbahnprodukte mit erhöhter Saugfähigkeit Expired EP0077005B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109199T ATE22713T1 (de) 1981-10-05 1982-10-05 Trockengelegte gemusterte faserbahnprodukte mit erhoehter saugfaehigkeit.

Applications Claiming Priority (2)

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US30901581A 1981-10-05 1981-10-05
US309015 1999-05-10

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EP0077005A1 EP0077005A1 (de) 1983-04-20
EP0077005B1 true EP0077005B1 (de) 1986-10-08

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EP82109199A Expired EP0077005B1 (de) 1981-10-05 1982-10-05 Trockengelegte gemusterte Faserbahnprodukte mit erhöhter Saugfähigkeit

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EP (1) EP0077005B1 (de)
JP (1) JPS58144197A (de)
AT (1) ATE22713T1 (de)
CA (1) CA1193919A (de)
DE (1) DE3273640D1 (de)
DK (1) DK439282A (de)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2025088099A1 (de) * 2023-10-27 2025-05-01 Voith Patent Gmbh Verfahren und maschine zur herstellung einer trockengelegten faserstoffbahn

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US4476078A (en) * 1982-05-04 1984-10-09 James River-Dixie/Northern, Inc. Process for manufacturing embossed nonwoven fibrous products
DE69405770D1 (de) * 1993-10-28 1997-10-23 Kobs Kroyer Ingelise Modifiziertes latex
AU7990394A (en) * 1993-10-28 1995-05-22 Kroyer, Ingelise Mechanical partial neutralization of hydrogen bonds for production of a softer and more silky air-laid fibrous product
EP0745717A1 (de) 1995-06-01 1996-12-04 Kaysersberg Verfahren zum Veredeln eines trockengeformten Vliesstoff und so veredelter Vliesstoff
US5938893A (en) * 1997-08-15 1999-08-17 The Procter & Gamble Company Fibrous structure and process for making same
US6432272B1 (en) 1998-12-17 2002-08-13 Kimberly-Clark Worldwide, Inc. Compressed absorbent fibrous structures
ES2267304T3 (es) * 1998-12-17 2007-03-01 Kimberly-Clark Worldwide, Inc. Estructuras fibrosdas absorbentes comprimidas.
FR2839918A1 (fr) * 2002-05-27 2003-11-28 Adco Mfg Materiau complexe en plaque pour la realisation d'un emballage destine en particulier a des produits alimentaires, son procede de fabrication et l'emballage obtenu avec ce materiau
US7924142B2 (en) 2008-06-30 2011-04-12 Kimberly-Clark Worldwide, Inc. Patterned self-warming wipe substrates
JP2017190538A (ja) * 2016-04-13 2017-10-19 山田　菊夫 パルプ積繊シート製造装置及びパルプ積繊シート製造方法

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US3017304A (en) * 1956-05-24 1962-01-16 Personal Products Corp Absorbent fibrous structure and method of production
US3867225A (en) * 1969-01-23 1975-02-18 Paper Converting Machine Co Method for producing laminated embossed webs
US3616157A (en) * 1969-08-08 1971-10-26 Johnson & Johnson Embossed nonwoven wiping and cleaning materials
GB1372502A (en) * 1971-10-07 1974-10-30 Johnson & Johnson Non-woven fabric
US3905863A (en) * 1973-06-08 1975-09-16 Procter & Gamble Process for forming absorbent paper by imprinting a semi-twill fabric knuckle pattern thereon prior to final drying and paper thereof
US3908659A (en) * 1974-03-14 1975-09-30 Procter & Gamble Absorbent pad structure, diaper construction utilizing same and methods of manufacture thereof
US4135024A (en) * 1976-08-16 1979-01-16 Scott Paper Company Method of treating a low integrity dry-formed nonwoven web and product made therefrom
US4191609A (en) * 1979-03-09 1980-03-04 The Procter & Gamble Company Soft absorbent imprinted paper sheet and method of manufacture thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025088099A1 (de) * 2023-10-27 2025-05-01 Voith Patent Gmbh Verfahren und maschine zur herstellung einer trockengelegten faserstoffbahn

Also Published As

Publication number Publication date
JPS58144197A (ja) 1983-08-27
EP0077005A1 (de) 1983-04-20
CA1193919A (en) 1985-09-24
DE3273640D1 (en) 1986-11-13
DK439282A (da) 1983-04-06
ATE22713T1 (de) 1986-10-15

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