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WO2005095713A1 - Produit absorbant plat multicouches et procede de fabrication - Google Patents

Produit absorbant plat multicouches et procede de fabrication Download PDF

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Publication number
WO2005095713A1
WO2005095713A1 PCT/EP2004/002075 EP2004002075W WO2005095713A1 WO 2005095713 A1 WO2005095713 A1 WO 2005095713A1 EP 2004002075 W EP2004002075 W EP 2004002075W WO 2005095713 A1 WO2005095713 A1 WO 2005095713A1
Authority
WO
WIPO (PCT)
Prior art keywords
ply
adhesive
dye
absorbent product
inner ply
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2004/002075
Other languages
English (en)
Inventor
Emmanuelle Morin
Günther Zöller
Joachim Leonhardt
Ferdinand Hein
Harald Harlacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essity Germany GmbH
Original Assignee
SCA Hygiene Products GmbH
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 SCA Hygiene Products GmbH filed Critical SCA Hygiene Products GmbH
Priority to PCT/EP2004/002075 priority Critical patent/WO2005095713A1/fr
Publication of WO2005095713A1 publication Critical patent/WO2005095713A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/06—Embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • 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
    • D21H27/30—Multi-ply
    • D21H27/32—Multi-ply with materials applied between the sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2432/00—Cleaning articles, e.g. mops or wipes

Definitions

  • the invention relates to multi-ply planar absorbent products and especially 3-plies products made of plies of tissue paper and non-wovens.
  • non-woven ISO 9092, DIN EN 29092
  • non-woven a large number of extremely varied production processes are used, such as the air-laid and spun-laced techniques as well as wet-laid techniques.
  • the non- woven includes mats, non-woven fabrics and finished products made thereof.
  • Non-wovens may also be called textile-like composite materials, which represent flexible porous fabrics that are not produced by the classic methods of weaving warp and weft or by looping.
  • non-wovens are produced by intertwining, cohesive or adhesive bonding of fibres, or a combination thereof.
  • the non-woven material can be formed of natural fibres, such as cellulose or cotton fibres, but can also consist of synthetic fibres, such as Polyethylene (PE) , polypropylene (PP) , polyurethane (PU) , polyester, nylon or regenerated cellulose, or a mix of different fibres.
  • the fibres may, for example, be present in the form of endless fibres of pre-fabricated fibres of a finite length, as synthetic fibres produced in situ, or in the form of staple fibres.
  • the nonwovens according to the invention may thus consist of mixtures of synthetic and cellulose fibrous material, e.g. natural vegetable fibres (see ISO 9092, DIN EN 29092) .
  • a tissue paper is defined as a soft absorbent paper having a low basis weight.
  • the total basis weight of multiple-ply tissue products is preferably equal to a maximum of 65 g/m 2 , more preferably to a maximum of 50 g/m 2 .
  • Its density is typically below 0.6 g/cm 3 , preferably below 0.30 g/cm 3 and more preferably between 0.08 and 0.20 g/cm 3 .
  • tissue is distinguished from paper production by the its extremely low basis weight and its much higher tensile energy absorption index (see DIN EN 12625-4 and DIN EN 12625-5) .
  • Paper and tissue paper also differ in general with regard to the modulus of elasticity that characterizes the stress-strain properties of these planar products as a material parameter.
  • a tissue's high tensile energy absorption index results from the outer or inner creping.
  • the former is produced by compression of the paper web adhering to a dry cylinder as a result of the action of a crepe doctor or in the latter instance as a result of a difference in speed between two wires ("fabrics") .
  • fabrics two wires
  • Moist tissue paper webs are usually dried by the so-called Yankee drying, the through air drying (TAD) or the impulse drying method.
  • the fibers contained in the tissue paper are mainly cellulosic fibres, such as pulp fibers from chemical pulp (e.g. Kraft sulfite and sulfate pulps), mechanical pulp (e.g. ground wood) , thermo mechanical pulp, chemo-mechanical pulp and/or chemo-thermo mechanical pulp (CTMP) . Pulps derived from both deciduous (hardwood) and coniferous (softwood) can be used. The fibers may also be or include recycled fibers, which may contain any or all of the above categories.
  • chemical pulp e.g. Kraft sulfite and sulfate pulps
  • mechanical pulp e.g. ground wood
  • thermo mechanical pulp chemo-mechanical pulp and/or chemo-thermo mechanical pulp (CTMP)
  • CMP chemo-thermo mechanical pulp
  • Pulps derived from both deciduous (hardwood) and coniferous (softwood) can be used.
  • the fibers may also be or include recycled fibers, which may contain
  • the fibers can be treated with additives - such as fillers, softeners, such as quaternary ammonium compounds and binders, such as conventional dry-strength agents or wet-strength agents used to facilitate the original paper making or to adjust the properties thereof.
  • additives such as fillers, softeners, such as quaternary ammonium compounds and binders, such as conventional dry-strength agents or wet-strength agents used to facilitate the original paper making or to adjust the properties thereof.
  • the tissue paper may also contain other types of fibers, e.g. regenerated cellulosic fibres or synthetic fibers enhancing, for instance, strength, absorption, smoothness or softness of the paper.
  • Tissue paper may be converted to the final tissue product in many ways, for example, by embossing or laminating it into a multi -ply product, rolled or folded.
  • tissue paper is to be made out of pulp, the process essentially comprises
  • a forming that includes the headbox and the forming wire portion
  • the drying portion (TAD (through air drying) ) or conventional drying on the yankee cylinder) that also usually includes the crepe process essential for tissues, c typically the monitoring and winding area.
  • Paper can be formed by placing the fibers, in an oriented or random manner, on one or between two continuously revolving wires of a paper making machine while simultaneously removing the main quantity of water of dilution until dry-solids contents of usually between 12 and 35 % are obtained. Drying the formed primary fibrous web occurs in one or more steps by mechanical and thermal means until a final dry-solids content of usually about 93 to 97 %. In the case of tissue making, this stage is followed by the crepe process which crucially influences the properties of the finished tissue product in conventional processes.
  • the conventional dry crepe process involves creping on a usually 4..5 to 6 m diameter drying cylinder, the so-called yankee cylinder, by means of a crepe doctor with the aforementioned final dry- solids content of the raw tissue paper (wet creping can be used if lower demands are made of the tissue quality) .
  • the creped, finally dry raw tissue paper (raw tissue) is then available for further processing into the paper product or tissue paper product according to the invention.
  • TAD through air drying
  • the fibrous web is supported by an air-permeable wire or belt (or TAD-fabric) and during its transport is guided over the surface of an air-permeable rotating cylinder drum (TAD-cylinder) .
  • TAD-cylinder air-permeable rotating cylinder drum
  • Structuring the supporting wire or belt makes it possible to produce any pattern of compressed zones broken up by deformation in the moist state, also named moulding, resulting in increased mean specific volumes and consequently leading to an increase in bulk softness without decisively decreasing the strength of the fibrous web.
  • Such a pattern is fixed in the area of the TAD-cylinder . Thereafter the pattern is further imprinted between the TAD-fabric and the Yankee- cylinder.
  • Creping may be conducted also during transfer of the paper sheet from the forming wire directly to the TAD-fabric or via a transfer fabric. For this creping the formingfabric runs faster than the following fabric receiving the sheet (rush transfer) .
  • the so- called inner sheet-forming screen can thus be operated at a speed that is up to 40% faster than that of the next fabric or that of the subsequent felt, the initially formed and already pre-drained paper web being transferred to the next TAD fabric.
  • Another possible influence on the softness and strength of the raw tissue lies in the production of a layering in which the primary fibrous web to be formed is built up by a specially constructed headbox in the form of physically different layers of fibrous material, these layers being jointly supplied as a pulp strand to the sheet making stage.
  • the following procedural steps are normally used individually or in combination: cutting to size (longitudinally and/or cross cutting), producing a plurality of plies, producing mechanical ply adhesion, volumetric and structural embossing, ply adhesion, folding, imprinting, perforating, application of lotions, smoothing, stacking, rolling up.
  • an intermediate step preferably occurs with so-called doubling in which the raw tissue in the finished product ' s desired number of plies is usually gathered on a common multiply master roll .
  • the processing step from the raw tissue that has already been optionally wound up in several plies to the finished tissue product occurs in processing machines which include operations such as repeated smoothing of the tissue, edge embossing, to an extent combined with full area and/or local application of adhesive to produce ply adhesion of the individual plies (raw tissue) to be combined together, as well as longitudinal cut, folding, cross cut, placement and bringing together a plurality of individual tissues and their packaging as well as bringing them together to form larger surrounding packaging or bundles .
  • the individual paper ply webs can also be pre-embossed and then combined in a roll gap according to the foot-to-foot or nested methods.
  • Hygiene or wiping products primarily include all kind of dry- creped tissue paper, wet-creped paper and cellulose or pulp wadding or all kinds of non-wovens, or combinations, laminates or mixtures thereof.
  • Typical properties of these hygiene and wiping products include the ready ability to absorb tensile stress energy, their drapability, good textile-like flexibility, properties which are frequently referred to as bulk softness, a high surface softness, and a high specific volume with a perceptible thickness. As high a liquid absorbency as possible and, depending on the application, a suitable wet and dry strength as well as an appealable visual appearance of the outer product surface is desired.
  • these hygiene and wiping products allow these hygiene and wiping products to be used, for example, as cleaning wipes such as paper or non-woven wipes, windscreen cleaning wipes, industrial wipes, kitchen paper, or the like; as sanitary products such as for example toilet paper, paper or non-woven handkerchiefs, household towels, towels, and the like; as cosmetic wipes such as for example facials and as serviettes or napkins, just to mention some of the products that can be used.
  • the hygiene and wiping products can be dry, moist, wet or pre-treated in any manner.
  • the hygiene and wiping products may be folded, interleaved or individually placed, stacked or rolled, connected or not, in any suitable manner.
  • the products can be used for personal and household use as well as commercial and industrial use. They are adapted to absorb fluids, for decorative purposes, for packaging or even just as supporting material, as is common for example in medical practices or in hospitals. In terms of their wide variety, hygiene and wiping products are now considered to be everyday products.
  • US 3958055 Al teaches adhesive bonding of isotropic fiber webs to form pattern bonded composites.
  • the process for manufacturing a non-woven fabric in a single path involves printing the adhesive on one web of cellulosic tissue in a clearly defined fine line pattern, laying the fiber web on the adhesive bearing surface of the tissue web, disposing a second cellulosic tissue web on the fiber web, and hot calendering the three layer composite so as to force the adhesive through the fiber web into the second tissue web while bonding the fibers of reinforcing web in place .
  • a multi-ply paper towel comprising for example three tissue plies.
  • the adhesive is applied either to the inner surface of the outer plies or on both sides of the inner ply in order to achieve ply-bonding between the inner ply and each of the outer plies.
  • a laminated fibrous structure comprising at least three tissue plies, wherein the adhesive is applied on each inner surface of the outer plies in order to achieve ply- bonding between each of the outer plies and the inner ply.
  • JP 9-276175- A a towel having an intermediate layer formed with a predetermined printed pattern.
  • the intermediate layer is sandwiched between a first and second transparent layer.
  • the transparent layers are made of thin non-woven cloth.
  • Adhesion Ability is the ability of a material to bind with another one using a given adhesive and resulting in a ply bonding of an acceptable level .
  • a ply bonding of an acceptable level for tissue products is in a range between 0,08 and 0,3 N/50mm (measured on a dry material, on the machine direction/mean value of the peaks above the total mean value) .
  • a multi-ply planar absorbent product which comprises at least a first and a second outer tissue ply and at least one inner non-woven ply bonded together, wherein the inner ply is a material of no or low adhesion ability.
  • a first dye is present on one side of the inner ply in a first pattern of discrete dye deposits and/or a second dye is present on the other side of the inner ply in a second pattern of discrete dye deposits .
  • Each pattern of dye deposits is visible on the dye applied side of the inner ply from the outside of the adjacent outer ply.
  • the first and second pattern at least partly do not coincide.
  • the deposits are of coloured adhesive which is penetrated through the inner ply thereby bonding together the inner ply and at least the outer ply on the side opposite to the side where the adhesive is applied and dye pigments remain on the side where the dye is applied together with the adhesive.
  • at least one of the plies is embossed either separately or in unison.
  • both of the outer plies are embossed and the embossment can be such that sandwiching the inner ply the outer plies are in "foot-to-foot” contact wherein the dye or coloured adhesive is present at least in some of the "foot-to-foot” areas. If steel rolls are used for embossing in these "foot-two-foot” areas the necessary pressure is achieved to be applied on the dye and/or the coloured adhesive.
  • the embossment is such that sandwiching the inner ply the outer plies are in "nested” contact wherein the dye or coloured adhesive is present in at least some of the "nested” areas.
  • the adhesive surrounds mechanically fibers of the inner ply according to an interlocking grip.
  • the material of the non-woven inner ply can be a hydrophilic material.
  • the material is hydrophilic spunbond of low grammage .
  • the tissue of the outer plies may be a through-air-dried (TAD) paper of substantially 18g/m 2 and the material of the inner ply then might be a hydrophilic spunbond non-woven of low grammage of substantially 9gsm.
  • TAD through-air-dried
  • a process for manufacturing of a multi-ply planar absorbent product which comprises at least a first and a second outer tissue ply and at least one inner non-woven ply made of material of low adhesion ability bonded together, said process comprises the steps of applying dye or coloured adhesive on one side of the inner ply in a first pattern of discrete deposits and/or applying dye are coloured adhesive on the other side of the inner ply in a second pattern of discrete deposits, wherein said second pattern at least partly may no coincide with the first pattern.
  • first and second tissue ply are placed on both sides of the inner ply carrying the dye or coloured adhesive and the plies are pressed together at least in those areas carrying the discrete deposits to cause the adhesive penetrating through the inner ply thereby bonding together at least the inner ply and the ply lying opposite to the application side of the respective adhesive deposit and /or thereby keeping the dye pigments on the side of the inner ply where those are applied such that those are visible from outside through the respective outer plies.
  • a product is achieved in which in an easy manner a coloured design pattern can be provided on both sides of the product .
  • These designs may be of independent shapes and colours.
  • Fig.l shows the principle of the colouring of a three-ply product .
  • Fig.2a to Fig.2c show the steps of manufacturing coloured three-ply planar absorbent product.
  • Fig.3 to Fig.5 show different modes of manufacturing a three- ply product with different modes of applying the dye or the coloured adhesive. Description of embodiments of the present invention including the best mode of the invention
  • the plies A, B and C are named the outer plies and the ply B the inner ply.
  • the outer plies are made of a material being 18g/m 2 TAD (through air-dried) tissue paper.
  • the material of the inner ply B is for example spunbond hydrophilic low grammage non-woven of 9gsm.
  • Such a non-woven has a low adhesion ability especially when the fiberes are covered by a surfactant.
  • non- woven is used a 100% Polypropylene based hydrophilic spunbond (supplied from Supplier Union, 9 gsm, reference S0900PPW) .
  • the non-woven is hydrophilic due to application of a surfactant while producing it.
  • Fig.l is illustrated the application of drops of coloured adhesive al on one side 1 of the inner ply B.
  • the colour is for instance green.
  • On the other side 2 of the inner ply B also drops of coloured adhesive a2 are applied.
  • this adhesive has the colour red.
  • a pattern of adhesive drops are applied to the inner ply B in such a manner that the patterns do not coincide.
  • the material of the inner ply B is in this example spunbond hydrophilic non-woven of low grammage having a low adhesion ability so that by the adhesive a2 no ply-bonding can be achieved between the inner ply B and the outer ply C.
  • the non-woven used is (supplied by supplier UNION, 9gsm, reference SO900PPW) a 100% Polypropylene based hydrophilic spunbond. In this case the non-woven is hydrophilic due to the application of a surfactant while producing it.
  • Under adhesion ability is to be understood the ability of a material to bind with another one using a given adhesive and resulting in a ply bonding of an acceptable level.
  • a ply bonding of an acceptable level for tissue production is in a range between 0.08 and 0.3 N/50mm (average of peaks on dry material in the machine direction) . Therefore, the adhesive a2 penetrates the inner ply B and is between the fibers interlocked and the adhesive extending to the side 1 of the inner ply B forms a ply-bonding with the outer ply A. The same happens with the adhesive al in the opposite manner.
  • the adhesive used is "SWIFT L 998/4", a Polyvinyl alcohol and Polyethyleneglycol based adhesive. It's viscosity is 18000 mPa at 26°C.
  • the dye pigments in the coloured adhesive do not penetrate the inner ply B so that the dye within the coloured adhesive a2 is present on the inner ply B and the inner side of the outer ply C and shines through to the outside o of the outer ply C.
  • the thickness of the colour is about lg/cm 3 at 20°C.
  • the test was made using the dye with water only (no adhesive) . This test confimed that the colour is "blocked" on the non-woven placed as a middle ply. In connection therewith the thickness of the dye was about lg/cm 3 at 20°C.
  • the manufacturing process as a principle is illustrated in Fig.2a to Fig.2c. According to Fig.2a in the before mentioned manner the coloured adhesive is applied on two sides of the inner ply B by an application tool 3 and 4. The result is visible from Fig.2b. In this step the inner ply B is brought together with the plies A and C.
  • Fig.2c the three-ply configuration, for instance as a continuous web is fed into the operation area of a pressure-marrying tool 5 and 6.
  • the pressure is exerted according to the arrows 7 to locations where the coloured adhesive is present so that the pressure is exerted not only on the plies but also on the coloured adhesive.
  • Fig.2d shows the well known "foot-to-foot” configuration, which could also be a so called and well known "nested" -configuration.
  • the adhesive penetrates through inner ply B in order to be fixed there so that the adhesive penetrated through the inner ply B causes ply-bonding with the adjacent outer ply being of tissue paper having a high adhesion ability.
  • the adhesive used herein may be for instance BVOH adhesive of high dry content (Atesin 1900, 16% for instance, Henkel- Polyvenyl Acetate Dispersion) .
  • Another adhesive is Polyvenyl alcohol and Plyethylenglycol based (SWIFT L 998/4) . It has a viscosity of 18.000 mPas at 26°C.
  • the manufacturing principle is more detailed illustrated in three embodiments shown in Fig.3, Fig.4 and Fig.5.
  • the inner ply B runs through application rollers 8 and 9 of application tools 3 and 4 for applying the coloured adhesive al and a2 from opposite sides on the inner ply sheet B.
  • the such prepared inner ply B is guided together with the outer plies A and C through pressure- marrying rolls 5, 6.
  • the outer plies A and C are embossed.
  • marrying - and embossing rolls and also applicator rolls are known in this technical field so that it is not necessary here to describe these means more in detail.
  • FIG.5 An embodiment different from the one illustrated in Fig .3 is illustrated in Fig.5.

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Abstract

Selon l'invention, on applique un adhésif de différentes couleurs (a1, a2) des deux côtés d'une épaisseur interne de non-tissé filé-lié hydrophile (B) de faible grammage et de capacité d'adhérence faible ou nulle. On fabrique, avec ladite épaisseur interne (B), un produit absorbant plat à trois épaisseurs comportant des épaisseurs externes de papier mousseline (A,C) en exerçant une pression sur l'adhésif coloré de manière que ce dernier pénètre à travers l'épaisseur interne (B) afin d'effectuer une liaison d'épaisseurs entre l'épaisseur interne (B) et l'épaisseur externe opposée (C). Les colorants restent sur la surface où l'adhésif coloré a été appliqué et sont visibles à travers l'épaisseur externe adjacente de manière qu'ils présentent un motif coloré des deux côtés du produit, les différents motifs ne se gênant pas étant donné que les colorants ne pénètrent pas dans l'épaisseur interne (B).
PCT/EP2004/002075 2004-03-02 2004-03-02 Produit absorbant plat multicouches et procede de fabrication Ceased WO2005095713A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007046073A3 (fr) * 2005-10-19 2007-07-19 Procter & Gamble Articles absorbants comportant des reliefs visuellement distincts
US20200100453A1 (en) * 2017-06-15 2020-04-02 Uniharm Corporation Absorbent sheet for pets
US10940051B2 (en) 2014-11-06 2021-03-09 The Procter & Gamble Company Absorbent articles with color effects

Citations (4)

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Publication number Priority date Publication date Assignee Title
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US3958055A (en) * 1974-08-14 1976-05-18 Kimberly-Clark Corporation Adhesive bonding of isotropic fiber webs to form pattern bonded composites
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JPH09276175A (ja) * 1996-04-08 1997-10-28 Oofuji Seishi Kk 手拭き用原反及び該原反を使用した手拭き製品

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WO2007046073A3 (fr) * 2005-10-19 2007-07-19 Procter & Gamble Articles absorbants comportant des reliefs visuellement distincts
US10940051B2 (en) 2014-11-06 2021-03-09 The Procter & Gamble Company Absorbent articles with color effects
US11696857B2 (en) 2014-11-06 2023-07-11 The Procter & Gamble Company Absorbent articles with color effects
US20200100453A1 (en) * 2017-06-15 2020-04-02 Uniharm Corporation Absorbent sheet for pets
US11582944B2 (en) * 2017-06-15 2023-02-21 Unicharm Corporation Absorbent sheet for pets

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