WO1999058762A1 - Procede de fabrication d'une bande de papier et utilisation de cette bande de papier - Google Patents

Procede de fabrication d'une bande de papier et utilisation de cette bande de papier Download PDF

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Publication number
WO1999058762A1
WO1999058762A1 PCT/US1999/010434 US9910434W WO9958762A1 WO 1999058762 A1 WO1999058762 A1 WO 1999058762A1 US 9910434 W US9910434 W US 9910434W WO 9958762 A1 WO9958762 A1 WO 9958762A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
paper web
embossed
pattern
per square
Prior art date
Application number
PCT/US1999/010434
Other languages
English (en)
Inventor
Katherine Louise Heinicke Moore
Douglas E. Robinson
Bernhard Maier
Original Assignee
The Procter & Gamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to EP99922978A priority Critical patent/EP1102891A1/fr
Priority to CA002329798A priority patent/CA2329798A1/fr
Priority to AU39850/99A priority patent/AU3985099A/en
Priority to KR1020007012643A priority patent/KR20010043536A/ko
Priority to JP2000548546A priority patent/JP2002514695A/ja
Publication of WO1999058762A1 publication Critical patent/WO1999058762A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper

Definitions

  • the present invention relates to a process for the manufacture of a paper web, to the paper web and to the use of the paper web.
  • the invention relates to personal cleaning products such as toilet tissue, facial tissue, skin care articles for cosmetic and therapeutic purposes, paper towels, and dry wipes.
  • Such items are a staple of everyday life.
  • the large demand and constant usage for such consumer products has created a demand for improved versions of these products.
  • Softness is the tactile sensation perceived by the consumer as he/she holds a particular product, rubs it across his/her skin, or crumples it within his/her hand. This tactile sensation is a combination of several physical properties.
  • One of the more important physical properties related to the softness is generally considered by those skilled in the art to be the stiffness of the paper tissue from which the product is made. Stiffness, in turn, is usually considered to be directly dependent on the dry tensile strength of the web.
  • Strength is the ability of the product to maintain physical integrity and to resist tearing, bursting, and shredding under use conditions.
  • Absorbency is the measure of the ability of a product to absorb quantities of liquid, particularly aqueous solutions or dispersions. Overall absorbency as perceived by the human consumer is generally considered to be a combination of the total quantity of a liquid a given mass of tissue paper will absorb at saturation as well as the rate at which the mass absorbs the liquid.
  • US-A-4 637 859 issued on 20 ,h January 1987 discloses a process for the manufacture of a paper web comprising the steps of :
  • WO95/08671 published on 30 th March 1995, discloses a step of embossing a pattern on to a paper web.
  • the object of the invention is achieved by an average density of the deflection conduits which is greater than 0.6 conduits per square millimeter (400 conduits per square inch), and by the further step of embossing the dried paper web (124) to form a pattern of embossed sites, the pattern of embossed sites having a density of at least 0.03 embossed sites per square millimeter (about 20 embossed sites per square inch).
  • the invention also relates to a paper web having a basis weight of at least 50 g/m 2 ( about 30 lbs per 3000 square feet), the paper web having a micropattern comprising raised elements with a density of greater than 0.6 conduits per square millimeter (about 400 conduits per square inch), and additionally having an embossed macropattern, the pattern of embossed sites having a density of at least 0.03 embossed sites per square millimeter.
  • the invention also provides for the use of a paper web for improved cleaning performance having a micropattern comprising raised elements with a density of greater than 0.6 conduits per square millimeter, and having an embossed macropattern, the pattern of embossed sites having a density of at least 0.03 embossed sites per square millimeter.
  • the paper web is used as a personal cleansing product such as toilet tissue, facial tissue, skin care articles for cosmetic and therapeutic purposes, paper towels, and dry wipes, most preferably a toilet tissue.
  • the pattern of embossed sites has a density of from 0.04 to 0.22 embossed sites per square millimeter, and more preferred that the ratio of the average density of the embossed sites to the average density of the deflection conduits is from 8:1 to 32:1 , most preferred is from 12:1 to 24:1.
  • the pattern of embossed sites is bilaterally staggered in a pattern having a principal axis 45° from the machine direction of manufacture, nested embossing being most preferred.
  • Figure 1 is a schematic representation of one embodiment of a continuous papermaking machine which is suitable for use in the present invention.
  • Figure 2 is a section through an imprinting belt which is suitable for use in the present invention.
  • Figure 3 is a plan view of the more preferred embossing pattern on the paper web.
  • the present invention relates to a process for the manufacture of a paper web comprising the steps of providing an aqueous dispersion of papermaking fibres or "furnish", and forming an embryonic web of the papermaking fibres from the dispersion on a first foraminous member.
  • the embryonic web is subsequently transferred to a second formainous member comprising an embryonic web-contacting surface comprising a macroscopically monoplanar, patterned, continuous network surface defining within the second foraminous member a plurality of discrete, isolated, deflection conduits.
  • the first and second foraminous members are normally separate and distinct members, and there may be other members placed between the first and second member. Alternatively the first and second foraminous members may be a single member. However it is preferred that the embryonic web is transferred directly from the first foraminous member to the second foraminous member.
  • paper web what is meant herein is a structure comprising one or more laminae or “plies” of non-woven fibrous material.
  • imprinted what is meant herein is that a pattern is formed onto the paper web by the step of water removal and, at the same time, deflecting the papermaking fibres in the embryonic web into the deflection conduits and whereby water is removed from the embryonic web through the conduits to form an intermediate web of the papermaking fibres.
  • the deflection conduits which imprint the micropattern have a density of at least 0.6 conduits per square millimetre, preferably at least 0.7 to 1.5 conduits per square millimetre.
  • a larger pattern may, optionally, also be imprinted onto the paper web for aesthetic effect, as disclosed in US-A-5 328 565, issued July 12, 1994.
  • the process for making the imprinted paper web typically involves the steps of depositing a papermaking furnish on a foraminous forming wire such as a Fourdrinier wire to form a wet web and the juxtaposing the web against an array of supports.
  • the web is pressed against the array of supports, thereby resulting in densified zones in the web at the locations geographically corresponding to the points of contact between the array of supports and the web.
  • the remainder of the web not compressed during this operation is referred to as the high bulk field.
  • This high bulk field can be further dedensified by application of fluid pressure, such as with a vacuum type device or a blow-through dryer, or by mechanically pressing the web against the array of supports.
  • the web is dewatered, and optionally predried, in such a manner so as to avoid compression of the high bulk field. This is preferably accomplished by fluid pressure, such as with a vacuum type device or a blow-through dryer, or alternately by mechanically pressing the web against the array of supports wherein the high bulk field is not compressed.
  • the operations of dewatering, optional predrying and formation of the densified zones may be integrated or partially integrated to reduce the total number of processing steps performed.
  • the web is dried to completion, preferably still avoiding mechanical pressing.
  • from about 8% to about 55% of the tissue paper surface comprises densified knuckles having a relative density of at least 125% of the density of the high bulk field.
  • the array of supports is preferably an imprinting carrier fabric having a patterned placement of knuckles which operate as the array of supports which facilitate the formation of the densified zones upon application of pressure.
  • the pattern of knuckles constitutes the array of supports previously referred to.
  • Imprinting carrier fabrics are disclosed in US-A-3 301 746, Sanford and Sisson, issued January 31, 1967; US-A-3 821 068, Salvucci, Jr.
  • the furnish is first formed into a wet web on a foraminous forming carrier, such as a Fourdrinier wire.
  • the web is dewatered and transferred to an imprinting fabric.
  • the furnish may alternately be initially deposited on a foraminous supporting carrier which also operates as an imprinting fabric.
  • the wet web is dewatered and, preferably, thermally predried to a selected fiber consistency of between 40% and 80%.
  • Dewatering is preferably performed with suction boxes or other vacuum devices or with blow-through dryers.
  • the knuckle imprint of the imprinting fabric is impressed in the web as discussed above, prior to drying the web to completion.
  • Figure 1 illustrates a highly preferred continuous process comprising:
  • the paper web 124 is also embossed (not shown in Figure 1).
  • Figure 2 illustrates a highly preferred imprinting belt 10 which comprises two primary components: a framework 12 and a reinforcing structure 14.
  • the framework 12 preferably comprises a cured polymeric photosensitive resin.
  • the framework 12 and belt 10 have a first surface which defines the paper contacting side of the belt 10 and an opposed second surface oriented towards the papermaking machine on which the belt 10 is used.
  • the framework 12 defines a predetermined pattern, which imprints a like pattern onto the paper 20 of the present invention.
  • a particularly preferred pattern for the framework 12 is an essentially continuous network. If the preferred essentially continuous network pattern is selected for the framework 12, discrete deflection conduits 16 will extend between the first surface and the second surface of the belt 10. The essentially continuous network surrounds and defines the deflection conduits 16.
  • the papermaking belt 10 according to the present invention is macroscopically monoplanar.
  • the plane of the papermaking belt 10 defines its X-Y directions. Perpendicular to the X-Y directions and the plane of the papermaking belt 10 is the Z- direction of the belt 10.
  • the paper 20 according to the present invention can be thought of as macroscopically monoplanar and lying in an X-Y plane. Perpendicular to the X-Y directions and the plane of the paper 20 is the Z-direction of the paper 20.
  • the first surface of the belt 10 contacts the paper 20 carried thereon. During papermaking, the first surface of the belt 10 imprints a pattern onto the paper 20 corresponding to the pattern of the framework 12.
  • the second surface of the belt 10 is the machine contacting surface of the belt 10.
  • the second surface may be made with a backside network having passageways therein which are distinct from the deflection conduits 16.
  • the passageways provide irregularities in the texture of the backside of the second surface of the belt 10.
  • the passageways allow for air leakage in the X-Y plane of the belt 10, which leakage does not necessarily flow in the Z-direction through the deflection conduits 16 of the belt 10.
  • the second primary component of the belt 10 according to the present invention is the reinforcing structure 14.
  • the reinforcing structure 14 like the framework 12, has a first or paper facing side and a second or machine facing surface opposite the paper facing surface.
  • the reinforcing structure 14 is primarily disposed between the opposed surfaces of the belt 10 and may have a surface coincident the backside of the belt 10.
  • the reinforcing structure 14 provides support for the framework 12.
  • the reinforcing component is typically woven, as is well known in the art.
  • the portions of the reinforcing structure 14 registered with the deflection conduits 16 prevent fibers used in papermaking from passing completely through the deflection conduits 16 and thereby reduces the occurrences of pinholes. If one does not wish to use a woven fabric for the reinforcing structure 14, a nonwoven element, screen, net, or a plate having a plurality of holes therethrough may provide adequate strength and support for the framework 12 of the present invention.
  • the depth of the deflectionconduits i.e. the distance between the papermaking side of the reinforcing structure and the first surface of the belt is the "overburden".
  • the overburden is typically between 0.3 mm and 0.6 mm.
  • the belt 10 according to the present invention may be made according to any of commonly assigned US-A-4, 514,345, issued April 30, 1985 to Johnson et al.; US-A- 4,528,239, issued July 9, 1985 to Trokhan; US-A-5,098,522, issued March 24, 1992; US-A-5,260,171 , issued Nov. 9, 1993 to Smurkoski et al.; US-A-5,275,700, issued Jan. 4, 1994 to Trokhan; US-A-5,328,565, issued July 12, 1994 to Rasch et al.; US-A- 5,334,289, issued Aug.
  • embossing is performed by a process referred to as nested embossing.
  • nested embossing two paper webs are embossed between mated pressure rolls and pattern rolls.
  • the pressure rolls and pattern rolls are juxtaposed with parallel axes to form three nips, a first nip between the bottom pressure roll and the bottom pattern roll, a second nip between the bottom pressure roll and the bottom pattern roll, and a third nip between the top and bottom pattern rolls.
  • the pattern rolls have protruberances which extend radially outwardly and contact the periphery of the respective pressure rolls at the respective nips.
  • Each paper web is fed through one of the nips between the pattern roll and the respective pressure roll.
  • Each paper web is embossed in the nip by the protruberances of the respective pattern roll.
  • one of the paper webs has adhesive applied to the resulting embossed sites by an adhesive applicator roll.
  • the adhesive applicator roll may be utilized in conjunction with either web.
  • the embossed sites are the only portion of the web to which adhesive is applied.
  • Adhesive does not coat the entire surface of either web, but only the embossed sites of the lamina used in conjunction with and contacting the adhesive applicator roll.
  • the webs, one web having adhesive applied to the embossed sites are then fed through the nip between the top and bottom pattern rolls.
  • the laminae are juxtaposed in face-to-face relationship, with the embossed sites of each web registered with the non-embossed sites of the other web.
  • the two webs are then fed through a nip between the pattern roll associated with the adhesive applicator roll and a ply bonding roll, to insure the embossed sites having the adhesive applied from the adhesive applicator roll are securely in contact with and joined to the non-embossed region of the opposing web.
  • a highly preferred embossing pattern, illustrated in Figure 3 is non-continuous in at least one diagonal direction and comprising discrete embossing sites.
  • non-continuous what is meant herein is that there is a line of interruption in the equidistant spacing of the embossing sites on the paper web.
  • peating what is meant herein is that the pattern is formed more than once in the paper web.
  • the preferred embodiment of the invention, illustrated in Figure 3 comprises an embossing pattern of an angular nature, in particular in the form of a rhombus.
  • Foreshortening can be accomplished by creping the paper 20 from a rigid surface, and preferably from a cylinder. A Yankee drying drum 116 is commonly used for this purpose. Creping is accomplished with a doctor blade 17 as is well known in the art. Creping may be accomplished according to commonly assigned US-A- 4,919,756, issued April 24, 1992 to Sawdai. Alternatively or additionally, foreshortening may be accomplished via wet microcontraction as taught in commonly assigned US-A- 4,440,597, issued April 3, 1984 to Wells et al.
  • the use of the paper web for improved cleaning performance may be dry, or it may be used for cleaning soils or spills which are dispersions, solutions or emulsions in water, or in some other solvent.
  • the present invention has been found to be particularly effective when used as a toilet tissue for removal of faecal material.
  • the following method outlines the procedure for measuring the cleaning performance for the paper web.
  • the efficacy of cleaning is determined by using the spectrometer data to calculate the residual "colour" intensity (the delta E value) on the DC-fix foil.

Abstract

L'invention concerne un procédé relatif à la fabrication d'une bande de papier, qui comprend les étapes suivantes: (a) établissement d'une dispersion aqueuse de fibres de papier; (b) formation d'une bande embryonnaire (120) desdites fibres à partir de la dispersion, sur un premier élément foraminé (11); (c) transfert de la bande embryonnaire (120) sur un second élément foraminé (19), lequel comprend une surface de contact de bande embryonnaire, cette surface ayant un réseau macroscopique plan, formé et continu, qui définit dans ledit second élément foraminé (19) plusieurs conduits de déviation discrets et isolés (16); (d) élimination de l'eau de la bande embryonnaire sur le second élément foraminé (19), de manière à former une bande intermédiaire (122), cette élimination déviant les fibres de papier de la bande embryonnaire dans les conduits de déviation (16) de manière à l'éliminer l'eau de la bande embryonnaire via lesdits conduits (16), en vue de former une bande intermédiaire (122) de fibres de papier; (e) éventuellement, séchage de la bande intermédiaire. La densité moyenne des conduits de déviation (16) est supérieure à 0,6 conduit par mm2 (environ 400 conduits par pouce carré). Une dernière étape consiste à gaufrer la bande de papier séchée (124) de manière à former une série de sites gaufrés suivant une densité d'au moins 0,03 site gaufré par mm2 (environ 20 sites gaufrés par pouce carré). L'invention concerne en outre des bandes de papier produites selon le procédé décrit, ainsi que l'amélioration des performances de nettoyage desdites bandes de papier à l'utilisation.
PCT/US1999/010434 1998-05-13 1999-05-13 Procede de fabrication d'une bande de papier et utilisation de cette bande de papier WO1999058762A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP99922978A EP1102891A1 (fr) 1998-05-13 1999-05-13 Procede de fabrication d'une bande de papier et utilisation de cette bande de papier
CA002329798A CA2329798A1 (fr) 1998-05-13 1999-05-13 Procede de fabrication d'une bande de papier et utilisation de cette bande de papier
AU39850/99A AU3985099A (en) 1998-05-13 1999-05-13 Process for the manufacture of paper web, and use of the paper web
KR1020007012643A KR20010043536A (ko) 1998-05-13 1999-05-13 종이 웹의 제조 방법 및 종이 웹의 세정 성능 향상 용법
JP2000548546A JP2002514695A (ja) 1998-05-13 1999-05-13 紙ウエブの製造方法および紙ウエブの使用

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98108673.9 1998-05-13
EP98108673A EP0957201A1 (fr) 1998-05-13 1998-05-13 Procédé de fabrication d'une bande de papier et son utilisation

Publications (1)

Publication Number Publication Date
WO1999058762A1 true WO1999058762A1 (fr) 1999-11-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/010434 WO1999058762A1 (fr) 1998-05-13 1999-05-13 Procede de fabrication d'une bande de papier et utilisation de cette bande de papier

Country Status (7)

Country Link
EP (2) EP0957201A1 (fr)
JP (1) JP2002514695A (fr)
KR (1) KR20010043536A (fr)
CN (1) CN1300330A (fr)
AU (1) AU3985099A (fr)
CA (1) CA2329798A1 (fr)
WO (1) WO1999058762A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE371055T1 (de) * 2001-02-16 2007-09-15 Procter & Gamble Geprägtes und mit lotion behandeltes tissuepapier
US7407560B2 (en) 2001-02-16 2008-08-05 The Procter & Gamble Company Lotioned and embossed tissue paper
CN1978786B (zh) * 2005-12-09 2012-05-30 中国印钞造币总公司 一种防伪水印纸及其制造方法
US7744531B2 (en) * 2006-06-12 2010-06-29 The Procter & Gamble Company Method for assessing adhesion of soils or exudates to the skin

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140404A1 (fr) * 1983-08-23 1985-05-08 The Procter & Gamble Company Papier tissu et procédé pour sa préparation
US4637859A (en) 1983-08-23 1987-01-20 The Procter & Gamble Company Tissue paper
WO1995008671A1 (fr) 1993-09-24 1995-03-30 The Procter & Gamble Company Stratifie cellulosique a double epaisseur, appareil et procede de fabrication
EP0668152A1 (fr) * 1994-02-18 1995-08-23 Kimberly-Clark Corporation Procédé pour faire du papier bouffant doux p. ex.: mouchoirs en papier et produits en papier ainsi obtenus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140404A1 (fr) * 1983-08-23 1985-05-08 The Procter & Gamble Company Papier tissu et procédé pour sa préparation
US4637859A (en) 1983-08-23 1987-01-20 The Procter & Gamble Company Tissue paper
WO1995008671A1 (fr) 1993-09-24 1995-03-30 The Procter & Gamble Company Stratifie cellulosique a double epaisseur, appareil et procede de fabrication
EP0668152A1 (fr) * 1994-02-18 1995-08-23 Kimberly-Clark Corporation Procédé pour faire du papier bouffant doux p. ex.: mouchoirs en papier et produits en papier ainsi obtenus

Also Published As

Publication number Publication date
CN1300330A (zh) 2001-06-20
AU3985099A (en) 1999-11-29
CA2329798A1 (fr) 1999-11-18
EP1102891A1 (fr) 2001-05-30
EP0957201A1 (fr) 1999-11-17
KR20010043536A (ko) 2001-05-25
JP2002514695A (ja) 2002-05-21

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