WO2008104197A1 - Procédé de fabrication d'un produit d'hygiène et produit d'hygiène ainsi fabriqué - Google Patents

Procédé de fabrication d'un produit d'hygiène et produit d'hygiène ainsi fabriqué Download PDF

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Publication number
WO2008104197A1
WO2008104197A1 PCT/EP2007/001759 EP2007001759W WO2008104197A1 WO 2008104197 A1 WO2008104197 A1 WO 2008104197A1 EP 2007001759 W EP2007001759 W EP 2007001759W WO 2008104197 A1 WO2008104197 A1 WO 2008104197A1
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WO
WIPO (PCT)
Prior art keywords
web
treated
roll
log
wound
Prior art date
Application number
PCT/EP2007/001759
Other languages
English (en)
Inventor
Harald Harlacher
Joachim Leonhardt
Jürgen Sauter
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/EP2007/001759 priority Critical patent/WO2008104197A1/fr
Publication of WO2008104197A1 publication Critical patent/WO2008104197A1/fr

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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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/28—Colorants ; Pigments or opacifying agents
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed 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
    • D21H27/02—Patterned paper

Definitions

  • the present invention relates to a method of manufacturing a hygiene product in roll form and such a hygiene product having improved optical appearance and being easy to manufacture .
  • a further common technology of producing aesthetically enhanced multi-ply products is the so called Goffra Incolla process.
  • the Goffra Incolla process uses an embossing/lamination technology which is described, e.g. in GB 2 376 436. Additionally, pre-embossing is possible.
  • 2-, 3-, 4- and multi-ply products can be manufactured and coloured glue can be used for lamination. Symbols, logos and design elements like flowers, animals, feathers and so on can be used as coloured embossing/lamination elements. Consumers in some countries such as France often give preference to coloured toilet paper over white toilet paper. In this case, coloured tissue paper webs are used to manufacture coloured toilet paper rolls.
  • tissue paper webs To obtain these coloured tissue paper webs, suitable pigments and/or dyes are usually added to the pulp upon manufacturing the tissue paper web which is the basis for the tissue paper hygiene product.
  • suitable pigments and/or dyes are usually added to the pulp upon manufacturing the tissue paper web which is the basis for the tissue paper hygiene product.
  • the lateral end- faces and the main surface of the toilet paper roll are basically of the same overall colour in this case.
  • spots of the printing ink or glue may be visible on the lateral end- faces due to ink/glue penetrating through the web at the location of the designs. This situation is illustrated in Fig. 14.
  • the colour of the spots on the sides basically corresponds to the colour of the print/embossing on the web of material .
  • pad printing also needs a defined counter pressure which is missing in the case of the side of a hygiene roll for the reasons explained above.
  • Pad printing would have the additional problem that the printing would be undefined at the edge of the continuous web which would lead to an inferior appearance. Finally, there would be the risk that the webs of adjacent windings would stick together, caused by the ink. Consequently, the web could be damaged upon unwinding in use.
  • FR 2 590 149 describes paper rolls, such as hygienic paper rolls, indicating to the user that the end of the roll is approaching.
  • One out of the many suggestions to accomplish this is to colour the two edges of the paper on the roll in the innermost portion of the paper adjacent to the core. The colouring of the two edges is merely for the purpose of signalling to the user that the end of the roll is approaching.
  • the authors of FR 2 590 149 are not aware of any effect on the visual appearance of the roll product. Moreover, colouring the two edges of the paper on the roll in regions beyond the innermost portion would no longer achieve the purpose of signalling to the user that the end of the roll is approaching.
  • blue ink is jetted from the side, which will diffuse into the paper web due to capillary forces.
  • This mode of application can be expected to give an undefined and frayed coloured region both on the lateral end-faces of the roll and along the longitudinal edges of the paper web, which is unlikely to increase consumer acceptance due to an improved outer appearance of the product.
  • applying ink from the side of the roll, which ink will diffuse into the paper web may lead to juxtaposed paper windings sticking together so that the paper web may tear upon unwinding.
  • the production methods involves treating individual rolls in the above manner.
  • WO2006/099881 describes a method of controlling the cutting process of a log of material via marks.
  • the method comprises the step of providing a web of material to be wound to a roll of material, the web of material having at least a front edge and two longitudinal edges and the step of treating at least one segment of the web of material with at least one treating substance, the such treated segment extending basically in the longitudinal direction of the web of material, and the treated segment having at least one longitudinally extending section spaced apart from the front edge of the web of material at least by a distance corresponding to the innermost windings of the roll of material.
  • the method furthermore comprises the step of cutting the web of material in at least one cutting position corresponding to the lateral position of the treated segment and the step of winding up the web of material to at least one roll of material, wherein the web of material is wound starting from the front edge of the web of material .
  • roll of material in this context either relates to the individual rolls of material that are distributed to an end customer or to a roll of material in the form of a so called log which is subsequently cut into the individual rolls of material.
  • the present inventors found that the method of manufacturing the hygiene product as defined above offers, besides an improved optical appearance, the benefit of a facilitated process control, in particular with respect to the positioning of the cutting position which, consequently, leads to improved production and product accuracy.
  • the web of material is wound up to a roll of material in the form of a log before performing the step of cutting, and the web of material wound to the log is subsequently cut in at least one cutting position corresponding to the position of the treated segment, wherein at least one individual roll of material is cut from the log and the treated segment of the web of material provides at least one treated region on a lateral end-face of the individual roll of material.
  • Winding up the web of material to a log before cutting it offers a manufacturing method of high production efficiency as multiple individual rolls of material can be cut from the log.
  • the web of material is cut in a cutting position corresponding to the lateral position of the treated segment before it is wound up to at least one individual roll of material, wherein the treated segment of the web of material provides at least one treated region on a lateral end-face of the roll of material.
  • the web of material in order to enable an "off-line manufacturing" of the individual rolls of material, may be wound up to a mother reel after the treatment of the web of material and the mother reel being rewound to a log before performing the step of cutting the log to individual rolls of material.
  • the web of material is wound up to a mother reel after the treatment of the web of material and the mother reel is unwound before performing the step of cutting the web of material and the step of winding the cut web of material to individual rolls of material.
  • This variant is also appropriate for off-line manufacturing .
  • off-line manufacturing is understood to mean that the mother reels and/or the logs are stored and/or treated in a location different from the location in which the treatment of the web of material has been performed and are transferred to a subsequent manufacturing step before the individual rolls of material are manufactured.
  • mother reel in this context is understood to mean that the length of web of material wound onto the mother reel is longer than the length of web of material wound to the individual roll of material manufactured using the method.
  • the length of the web of material wound onto a mother reel may have at least twice the length of the length of the web of material wound onto an individual roll of material .
  • additional converting steps such as embossing, printing, application of substances and/or perforating the web of material can be performed before the web of material is wound to a roll of material .
  • the treated segment is applied to the web substantially continuously in the longitudinal direction for providing a continuously treated region on the lateral end-face of the cut roll of material.
  • the resulting treated region is also a continuous region, basically without any interruptions in the area of the treated region.
  • the treating substance may comprise a colouring agent for providing coloured segments, the colour, tone and/or shading of the colouring agent being different from the colour, tone and/or shading of the web material.
  • the colouring agent comprises an ink, a coloured glue/adhesive, a bleaching agent, a dye and/or a coloured lotion, in particular a coloured additive and/or skincare substance and/or cleaning agent (e.g. tenside) .
  • At least two sets of treated segments are applied to the web of material.
  • the sets of treated segments being arranged laterally spaced apart from one another in equal distances between the longitudinal edges of the web.
  • the respective longitudinal centres of the sets of treated segments correspond to the lateral extension of the individual rolls of material.
  • the treated segment is provided by way of printing, in particular flexo printing, spraying, in particular ink jet printing, curtain coating, slot nozzle application and/or by way of using an application roller, in particular in an embossing step.
  • a preferred optical appearance can be achieved when the treated segments comprise images, texts and/or ornaments.
  • images, texts and/or ornaments can be applied to the web of material, basically between the treated segments.
  • the treated segment is used for determining, controlling and/or maintaining the cutting position, in particular by treating the segment with a detectable substance, in particular with an optically detectable substance.
  • At least a first treated segment may be applied to the web of material, extending in a first longitudinal section of the web of material, and at least a second treated segment may be applied to the web of material, extending in a second longitudinal section of the web of material, wherein the first and the second segments are provided in the same relative lateral position with respect to the cutting position.
  • the first treated segment and the second treated segment are applied as a single stripe with a first colour, tone and/or shading in the first longitudinal section and a different colour, tone and/or shading in the second longitudinal section.
  • At least the first treated segment and the second treated segment overlap with one another in at least one longitudinal section.
  • This overlap may be manufactured by providing two sequential steps, e.g. multicolour printing in which in a first step yellow ink is applied and in a second step blue ink is applied on top of the yellow ink, resulting in green print (process print) .
  • Another concept for providing interesting optical and/or haptical appearance of the individual rolls of material is provided when at least a first treated segment and at least a second treated segment are applied to the web of material, the first treated segment and the second treated segment being provided basically parallel to one another, whereas in the step of treating the first and second segments, the step of cutting and/or the step of winding, the cutting position is shifted relatively from a cutting position corresponding to the first treated segment to a cutting position corresponding to the second treated segment.
  • the relative shift of the cutting position is effected by shifting the position of the web of material relative to the position of the partially wound log or roll of material.
  • Such a shift of the relative position of web and cutting means may be effected by shifting the log or roll of material with respect to a stationary web feed or by shifting the position of a treating means with respect to a stationary log.
  • first treated segment and the second treated segment are provided by two stripes of different colour, tone and/or shading extending in the longitudinal direction of the web of material in a basically parallel arrangement.
  • the relative shift is effected by shifting the position of the first treated segment and the second treated segment with respect to the longitudinal edges of the web of material .
  • a shift from a cutting position corresponding to the first treated segment section to a cutting position corresponding to the second treated segment is effected in a longitudinal transition position that corresponds to the transition of a first treated region of a lateral end-face to a second treated region.
  • a roll of material with at least two differently treated regions on its lateral end-faces can be provided.
  • the present invention provides a hygiene product according to the features of claim 28.
  • the hygiene product in particular tissue paper product, comprising a web of material wound to an individual roll of material, the individual roll of material having two lateral end- faces, at least one of the lateral end- faces of the roll being treated with at least one treating substance for providing at least one treated region of the lateral end- face, wherein at least one portion of the treated region is located spaced apart from the innermost portion of the web of material.
  • the area of the lateral end-face covered of the innermost portion of the web of material is less than 1% of the total area of the lateral end-face.
  • the hygiene product as defined above offers the same advantages as described above with respect to the improvements of the appearance, in particular the optical and haptical appearance and leads to improved production efficiency and accuracy.
  • the area of the wound web of material on the lateral end-face that covers all treated regions is more than 20%, preferably more than 50%, most preferably 100% of the total area of the wound web of material on the lateral end- face.
  • the provision of treated regions with these values provides a lateral end- face that can be haptically and visibly distinguished.
  • the treated region occupies at least a radial section of 2mm, preferably 5mm, more preferred 10mm, most preferred 20mm of the lateral end-face of the roll of material.
  • the area of the lateral end-face is intended to mean the lateral end-face of the wound web of material, i.e. exclusive of the inner hole of a core and the lateral surface of the core, if any.
  • the treated region extends in the lateral direction of the web of material less than 20 mm, preferably less than 10 mm, more preferred less than 5mm, most preferred less than 2 mm from the lateral end-face towards the inside of the web of material .
  • the colour, the tone and/or the shading of the treating substance is different from the colour, the tone and/or the shading of the web material, preferably when providing two or more treated regions on the lateral end-faces, in particular treated with different colours, tones and/or shadings .
  • the roll of material is wound on a core, preferably made from a cardboard material, and the core preferably has a colour, tone and/or shading different from the colour, tone and/or shading of the web material and/or the treated region.
  • the core has the same colour, tone and/or shading of the web material and/or the treated region.
  • the hygiene product preferably encompasses a web of material which comprises tissue paper, in particular a multi-ply tissue paper.
  • the web of material comprises a non-woven material.
  • the web of material may also comprise at least one layer of tissue paper and at least one layer of a non-woven material in a so called "hybrid" product.
  • the tissue paper and/or the non-woven comprises fibers and/or substances other than pure pulp, in particular recycled paper.
  • the treating substance is applied to the web of material on an outer side relative to the roll of material.
  • the treating substance may also be applied to the web of material on the inner side relative to the roll of material and/or between at least two plies of the web of material, corresponding to the needs of the respective product.
  • Typical tissue paper is semi-transparent such that the treating substance (e.g. ink) is usually also visible if it is applied between the plies.
  • the product may be a toilet paper, household towel or wipe.
  • Figure 1 is a schematic illustration of the method steps of the present disclosure
  • Figure 2 is a top view of a web of material, of a log and a roll of material according to a first embodiment
  • Figure 3 is a schematic top view of a web of material with treated segments in a second embodiment
  • Figure 4a is another top view of a web of material with treated segments in a third embodiment
  • Figure 4b is another top view of a web of material with treated segments in an alternative embodiment comprising ornaments ;
  • Figure 5 is another top view of a web with treated segments in a fourth embodiment ;
  • Figure 6a is yet another schematic top view of a web of material with treated sections
  • Figure 6b is a schematic top view of a web of material in an alternative embodiment
  • Figure 6c is a schematic top view of a web of material in yet another alternative embodiment
  • Figure 7 is a schematic side view of a log and a schematic perspective view of a hygiene product in the form of a roll of material according to the present disclosure
  • Figure 8 is another schematic side view of a log and a schematic perspective view of a hygiene product in the form of a roll of material according to another embodiment
  • Figure 9 is yet another schematic side view of a log and a schematic perspective view of a hygiene product according to yet another embodiment ;
  • Figure 10 is another schematic side view of a log and a schematic perspective view of a hygiene product according to another embodiment ;
  • Figure 11 is yet another schematic side view of a log and a schematic perspective view of a hygiene product according to yet another embodiment ;
  • Figures 12a to 12h are schematic illustrations of several different processes of winding up a web of material to a log;
  • Figure 13 is a schematic side view of a log and a schematic perspective view of a roll of material according to the prior art ;
  • Figure 14 is yet another schematic side view of a log and a schematic perspective view of a roll of material according to the prior art .
  • Figure 1 is a schematic view illustrating selected steps of the method for manufacturing a hygiene product according to the present disclosure.
  • a web of material 1 is provided that is to be wound to an individual roll of material 50 or to a log 2.
  • the web of material 1 may comprise at least one ply of tissue paper and/or one ply of a non-woven and may be, in particular, a multi-ply tissue paper web.
  • any suitable web of material can be used for manufacturing the hygiene product according to the present disclosure.
  • the web of material 1 is treated in a treating means 300 with a treating substance.
  • a treating substance comprises preferably a colouring agent for providing coloured segments on the web of material 1.
  • the colour, tone and/or shading of the colouring agent is preferably different from the colour, tone and/or shading of the web of material, in particular when applied to the web of material 1.
  • the treating means 300 in Figure 1 is shown in the form of an application roller 320 that applies the treating substance to the web of material 1 directly by contacting the outside of the web of material 1 with the application roller 320.
  • a counter roll 330 provides the necessary counter pressure to the application roll 320.
  • An anilox roll 310 distributes the treating substance evenly onto the application roller 320.
  • the treating means may be used for the treatment of the web of material 1.
  • the treating substance may be applied to the web of material 1 by a spraying device, in particular ink jet printing, general printing, in particular flexo printing, curtain coating, slot nozzle application and/or by way of using an application roller in an embossing step.
  • the treatment substance is ejected through a slot nozzle and the web of material is moved relative to the slot nozzle.
  • Mechanical contact between the slot nozzle and the web of material effects the application of the treatment substance to the web of material.
  • This method is usually used for the application of hot glue to webs of material.
  • the treatment method of curtain coating relates to the provision of a "curtain" of the application substance under which the web of material is advanced. Consequently, the substance is applied to the web of material by way of gravity or by way of additional electrostatic support. This method is known from the production of adhesive labels.
  • the treating means can be applied to the outside of the web of material 1, i.e. the surface of the web of material 1 that is directed towards the outside when the individual roll of material 50 is readily manufactured, or can be applied to the inside or between different plies of material in order to achieve the maximum result.
  • the location of application is certainly also dependent on the ability of the treatment substance to diffuse into the web material and on the viscosity of the treatment substance itself.
  • methods comprising the use of glue mixed with the treatment substance when ply bonding a multi-ply tissue paper, the use of an embossing means for the application of the treatment substance and/or the use of an ink-jet like applicator are conceivable for treating the web of material.
  • the web of material 1 is wound up to a roll of material in the form of a log 2 in a winding means 350.
  • the log 2 is removed from the winding means 350 and transferred to a cutting means which is symbolized by the sawing blade 360 in Figure 1.
  • the cutting means 360 is positioned with respect to the log 2 such that at least one individual roll of material 50 can be cut from the log 2.
  • the cutting step can also be carried out between the treating means and the winding means such that individual rolls of material are wound up instead of a log of material .
  • log defines a roll of the web of material 1 that has not yet been cut into the individual rolls of material. Usually, a log can be cut up into 8 to 60 individual rolls of material .
  • lateral and longitudinal are used with respect to the web of material, wherein the longitudinal direction corresponds to the longitudinal extension of the web of material wherein the lateral direction corresponds to the lateral extension of the web of material.
  • the term “lateral” is sometimes also referred to as the “cross direction (CD) " and the longitudinal direction is sometimes also referred to as the “machine direction (MD) " wherein these terms refer to the actual handling of the web of material in the production process .
  • the web of material 1 is preferably wound to the log 2 by- means of a separate core 20 that serves as a core of the resulting log 2 as well as for the individual rolls of material 50. Also in the case in which the web of material 1 is cut first and the cut web of material 1 is wound directly into the individual rolls of material 50, separate cores 20 can be provided.
  • the cores 20 are preferably made from a cardboard material and may have a colour, tone and/or shading that is different from the colour, tone and/or shading of the web of material and/or the colour, tone and/or shading of a treatment substance.
  • the log 2 or the individual roll of material 50 is wound without any internal structure, in particular without a core, directly around a winding structure that is removed after the log 2 has been formed such that, finally, an individual roll of material 50 is formed that does not have a core, i.e. a coreless roll.
  • FIG. 2 symbolizes selected steps of the manufacturing method in a top view.
  • the web of material 1 comprises at least a front edge 10 and two longitudinal edges 12 and 14.
  • the front edge 10 of the web of material 1 is the edge that is fed to the winding means 350 first.
  • the web of material 1 has an innermost portion 16 starting from this front edge 10 and the innermost portion 16 basically constitutes the innermost windings of the log 2 when wound up in the winding means.
  • the front edge 10 is the leading part of the innermost windings of the web of material .
  • the web of material 1 is treated with a treating substance.
  • the treatment is effected in at least one segment 40 extending basically in the longitudinal direction of the web of material, wherein the treated segment 40 basically extends beyond the innermost portion 16. Accordingly, at least parts of the treated segment 40 are located spaced apart from the innermost windings when the web of material 1 with the treated segment 40 is wound up to the log 2.
  • the longitudinal direction of the web of material 1 corresponds to the machine direction MD in which the web of material 1 is fed through the treating means 300 and the winding means 350.
  • the treated segment 40 is provided basically in the form of a stripe of treating substance extending from the front edge 10 in the longitudinal direction MD of the web of material 1 along the whole length of the web of material 1. Accordingly, the treated segment 40 extends all along the longitudinal direction of the web of material 1. This treatment of the entire longitudinal length of the web of material 1 with the treated segment 40 leads to a situation in which the treated segment 40 is also visible on the outside of the readily wound log 2 and, finally, on the individual roll of material 50 cut from the log 2.
  • the web of material 1 is provided with a set of several treated segments 40 that are spaced apart from one another in the lateral extension of the web of material 1, i.e. between the longitudinal edges 12, 14 of the web of material.
  • the treated segments 40 or more exactly their centres, are spaced apart from one another in the lateral direction of the web of material 1 by a distance d.
  • Distance d basically corresponds to the desired width of the individual roll of material 50 that is cut from the log 2.
  • the sides of the log are usually trimmed away in a so called cookie- or trim- section of the log such that the cut roll of material exhibits plane sides.
  • the number of treated segments 40 in the set of treated segments 40 is usually chosen to be n+1 if n is the desired number of rolls of material to be manufactured from a log.
  • the sawing blade 360 or the cutting means is positioned corresponding to the position of the treated segments 40.
  • the positioning of the cutting means 360 can be done by optically detecting the treated segment 40 and positioning the cutting means 360 accordingly.
  • the optical detection can be carried out e.g. by photo cells, a camera system, diodes, IR/NIR detectors, UV detectors and/or linear bars of diodes.
  • the cutting means 360 is positioned centred with respect to the lateral extension of the respective treated segment 40.
  • the cut performed by the cutting means 360 preferably extends through the centre of the treated segment 40 such that the lateral extension of the treated segment 40 on either side of the cut is basically equal to one another.
  • the cuts of the cutting means 360 are denoted in Figure 2 by reference numeral 365.
  • the cuts 365 through the log 2 also are directed directly through the treated segments 40.
  • the cuts separate the log 2 into individual rolls 50 of material which have lateral end-faces 54 on their respective cut surfaces, and the lateral end- faces 54 correspond to the positions of the cuts 365 through the log 2. Accordingly, on the lateral end-faces 54 of the individual roll of material 50, the treated segments 40 cut through and make up a treated region 45 which is clearly visible on the lateral end-faces 54 of the individual roll of material 50.
  • the treating substance which is used for treating the treated segment 40 of the web of material 1 preferably comprises a colouring agent for providing coloured segments wherein the colour, tone and/or shading of the colouring agent and/or the treated segment is different from the general colour, tone and/or shading of the web material .
  • the colouring agent colours the web of material in the treated segments fully such that even a cut through the web of material 1 uncovers the coloured segments.
  • the treating substance is applied such that it soaks or diffuses the web of material 1. Accordingly, the treated segments 40 which are provided with the colouring agent are, thus, clearly visible on the lateral end-faces which correspond to the cutting surfaces.
  • the use of a coloured or visible treating substance enables, on the one hand, an easy positioning of the cutting means 360 and, on the other hand, provides a unique appearance of the finished rolls of material.
  • the rolls 50 show on their end-faces 54 treated regions 45 which have a colour corresponding to the treatment with the treating substance and a colour different from the colour of the web of material .
  • the treated region 45 or, in this particular case, the coloured region improves the optical and/or haptical appearance of the rolls of material if they are distributed in a package.
  • the hygiene products are distributed to the end customer in transparent packages in which they are oriented such that the lateral end-faces 54 of the rolls 50 point towards the potential buyer. Accordingly, the rolls of material 50 with the coloured regions 45 provide a distinctive optical appearance.
  • the treating substance for treating the web of material 1 and for providing the treated segments 40 could also include a lotion, an additive or a skin care substance which equips the hygiene product, and in particular the web of material, with specific properties, either with respect to its use on a human body, or when it is used as a wiping paper, with respect to the respective wiped surfaces.
  • the treating substance that is applied to the web of material could be a one-component, a two-component or a more-component substance for treating hard surfaces, for example wood or glass surfaces with a specific detergent.
  • a two component treating substances could be applied to the web of material in an alternating manner such that the two components are mixed together only when the web of material is used by a user and e.g. wetted.
  • FIG 3 an alternative embodiment of a web of material 1 is shown in which two different sets of first treated segments 40 and second treated segments 42 are provided.
  • the first and second treated segments 40 and 42 are provided sequentially in the longitudinal direction MD of the web of material and the first treated segment 40 is changed to the second treated segment 42 in a transition region 44.
  • the first treated segment 40 is wound up first and the second treated segment 42 is wound up second. If the second treated segment 42 extends until the end of the web of material, it is also the second treated segment 42 that is visible from the outside of the log 2.
  • the first treated segment 40 and the second treated segment 42 have different colours, tones and/or shadings which would result in a roll of material that shows on its lateral end-face 54 two different treated regions of different colours, tones and/or shadings . This will also be explained again in the discussion of Figure 9 below.
  • Figure 4a shows yet another embodiment that enables the provision of at least two differently treated regions on a lateral end-face of a roll of material.
  • the web of material 1 is provided with a first treated segment 40 and a second treated segment 42, wherein the first and second treated segments 40, 42 differ from one another e.g. in their colour, tone and/or shading.
  • the two treated segments 40, 42 are provided parallel to one another in the form of a strip of two treated segments extending from the front edge 10 of the web of material 1 in the longitudinal direction MD towards the end of the web of material.
  • the cutting position which is identified in Figure 4a by reference numeral 365, changes from the first treated segment 40 to the second treated segment 42.
  • Such a shift in the position of the cut with respect to the treated sections results in a lateral end- face 54 of the individual roll of material 50 that shows a transition from a first treated region to a second treated region.
  • the web of material 1 can be shifted during the winding of the log 2 in the direction shown by the double-headed arrow Y in Figure 4a.
  • FIG 4b another embodiment is shown in which the treated segment 40 includes a number of ornaments 420 that are distributed on both sides of the treated segment 40.
  • the ornaments 420 can have the same colour, tone and/or shading as the treated segment 40 but can also have different colours.
  • each of the ornaments 420 or groups of ornaments can have a colour different from the colour of the treated segment 40.
  • the ornaments can have alternating colours.
  • Figure 5 shows yet another example of a web of material 1.
  • fragmented treated segments 40 are provided in different positions in the longitudinal direction of the web of material 1.
  • Such a positioning of the treated segments 40 would result in a lateral end- face of the roll of material which shows treated regions and untreated regions in a pattern that corresponds to the positioning of the treated segments 40 on the web of material 1.
  • the treated segments 40 as shown in this Figure can easily be effected by simply switching off the treatment means in the positions in which no treated segments 40 are present.
  • the non- treated sections could also be provided by lifting the printing plate/sleeve off the web of material.
  • Figure 6a shows yet another embodiment of a web of material with first treated segments 40 and second treated segments 42 which basically extend in parallel to one another along the longitudinal direction of the web of material 1 in a manner basically corresponding to the embodiment shown in Figure 4a.
  • the position of the first and second treated segments 40 and 42 is shifted parallel to themselves basically by the lateral width of the respective treated segments 40 and 42.
  • Such a shift can be effected by shifting the treatment means, in particular a printing means, a spraying means or the roll application means shown in Figure 1, with respect to the position of the web of material 1.
  • Figure 6b shows an alternative embodiment of the embodiment shown in Figure 6a.
  • the main difference between the embodiment shown in Figure 6a and Figure 6b is that the first and second treated segments 40, 42 in the transition region 44 are arranged differently.
  • the position of the treated sections 40, 42 shifts abruptly in the transition region 44 by the lateral width of the treated segments 40, 42 such that the first treated segment 40 on the upstream side relative to the transition region 44 is basically collinear with the second treated segment on the downstream side.
  • Figure 6c shows yet another alternative embodiment of the embodiments shown in Figures 6a and 6b.
  • the main difference lies in the arrangement of the first and second treated segments in the transition region 44.
  • the arrangement of the first and second treated sections 40, 42 leads to a relatively smooth transition in the transition region 44.
  • first and second treated segments are arranged such that, without changing the relative position of web of material and cutting means, the cutting position changes from the first treated section 40 to the second treated section 42 in the web of material.
  • Figure 7 is a side view of a log 2 and the resulting individual roll of material 50 in a perspective view.
  • the log 2 shown in this embodiment basically corresponds to the log 2 shown in Figure 2 above.
  • the treated segments 40 extend from the front edge of the web of material towards the end of the web of material 1 when the web of material 1 is wound to the log 2.
  • the cutting positions 365 are positioned with respect to the treated segments 40.
  • the cutting means is positioned such that the cutting position 365 lies basically in the centre of the treated segment 40.
  • the lateral end-face 54 of the resulting individual roll of material 50 also shows one treated region 45 extending all over the area of the end- face, in correspondence to the treated segments 40.
  • the treated region 45 comprises at least one part that is located spaced apart from the innermost portion of the web material.
  • the treated segments 40 comprise a colouring substance such that the treated region 45 on the lateral end-face 54 of the resulting individual roll of material 50 carries a colour that is different from the general colour of the web of material .
  • Symbols or images 60 are printed on the web of material 1 in an evenly or unevenly distributed manner. These symbols and images 60 are, however, not positioned in the treated segment 40 of the web of material 1.
  • the two side sections 22 of the log which are also referred to as cookie- or trim-sections, are cut away when the log 2 is cut into the individual rolls of material 50.
  • the lateral end- faces 54 of every single individual roll of material 50 show a smooth and plane surface in which the treated regions 45 are clearly visible.
  • FIG 8 yet another embodiment is shown.
  • the log 2 basically corresponds to the one shown in Figure 7.
  • the treated segment 40 is spaced apart from the front edge of the web of material 1 by a considerable distance, but extends towards the end of the web of material .
  • the resulting individual roll of material 50 shows on its lateral end-face 54 a treated region 45 which only shows a ring- shaped form extending from a certain radius towards the outside of the roll of material.
  • the inner region 47 of the roll of material does not show a treated region but plain web material. Accordingly, the region 47 is spaced apart from the innermost windings of the web of material .
  • an individual roll of material 50 can be provided which shows on its lateral end- face 54 a structure of two optically and/or haptically different regions.
  • Figure 9 shows another embodiment of a log 2.
  • This embodiment basically corresponds to the web of material shown in Figure 3.
  • the treated segment 42 is on the outside of the log 2.
  • the resulting roll of material shows on its lateral end-face 54 a first treated region 45 which corresponds to the treated segment 42 and also a treated region 49 which corresponds to the treated segment 40 of the web of material.
  • two differently treated regions 45 and 49 are visible. If the two differently treated segments 40 and 42 comprise substances with different colours, the resulting individual roll of material 50 shows on its lateral end-face 54 a structure with two differently coloured treated regions 45 and 49.
  • Figure 10 shows yet another embodiment of a log 2.
  • two different treated segments 40, 42 are visible which extend basically parallel to one another.
  • the strip of the two different treated segments 40, 42 basically corresponds to either the web structure shown in Figure 4a or to the web structure shown in Figure 6. Both web structures result in a individual roll of material 50 with a lateral end-face 54 comprising two differently treated regions 45 and 47.
  • the web of material 1 has to be shifted with respect to the winding mechanism while winding the log 2 (see, e.g., Figs. 12a, c, g, h) .
  • a shift of the partly wound log 2 relative to the moving web is also possible (see, e.g., Figs. 12b, f) .
  • the shift while winding results in a shift of the position of the first treated segment 40 and the second treated segment 42 with respect to a cut line.
  • the printing head, the spraying head or the roll applicator has to be shifted with respect to the web of material when treating the web of material (Fig. 12d, e) .
  • the shift of the treated segments 40, 42 with respect to the position of a cut also results in the structure of the lateral end-face as shown in Figure 10.
  • the cookie portions 22 of the web have to be cut away in order to provide a smooth and plane surface of the lateral end-face.
  • Figure 11 shows yet another embodiment of a log 2. As can be seen on the outer surface of the log, no treated sections are visible. However, as shows the perspective view of the resulting individual roll of material 50, a treated region 45 is present in the inner regions of the lateral end-face 54. The outer regions 47 are kept untreated and show the bare material of the web of material .
  • Figures 12a to 12h show schematically several different methods of a process of winding up a web of material to a log 2 when at least two differently coloured, toned and/or shaded regions are intended on the lateral end-face.
  • the different methods basically correspond to different web handling methods .
  • Figure 12a shows a web of material 1 which is fed to a winding means 350 which winds up the web of material 1 to a log 2.
  • a treatment means 300 is present for treating the web of material 1, in particular by applying treated segments to the web of material.
  • a web handler 370 is present which shifts the feeding direction of the web of material 1 parallel to itself.
  • the solid lines depict the situation in which the web handler 370 has already shifted the web of material 1 parallel to itself such that the position of the longitudinal edges 12, 14 of the web 1 is shifted parallel in the direction of the arrow, wherein the dashed line corresponds to the initial winding direction.
  • the shifting is effected by the web handler 370 preferably after a certain length of the web of material has already been wound to the log 2 such that only a portion of the web of material is wound to the log in the shifted position.
  • the cutting position 365 of this portion of the web of material is influenced.
  • the cutting position corresponds to the position of two overlaid treated segments of different colour, tone and/or shading.
  • Figure 12b shows schematically an alternative approach by moving the log 2 in the axial direction of the log 2 relative to the web of material after a first portion has already been wound up.
  • This axial movement of the log 2 relative to the web of material 1 also results in an overlay of at least two different lateral portions of the web such that, again, two regions of the lateral side-edges can be provided corresponding to a first and a second treated segment 40, 42.
  • Figure 12c shows schematically another alternative of the web handling method. This method basically corresponds to the method shown in Figure 12a but no treatment means is shown. In this alternative, a pre-treated web of material 1 is used that has already been treated with at least a first and a second treated segment 40, 42.
  • the treatment means 300 is shifted relative to the web of material in order to provide a shift of the relative position of the treated segments 40, 42 with respect to the cutting position.
  • the cutting step is done before the winding step such that after the treatment step and the cutting step individual rolls of material 50 are wound up.
  • Figure 12e shows another variant of the method in which, again, the treatment means is shifted with respect to the position of the web of material 1 before the web of material is wound to a log 2. Accordingly, the treated segments 40, 42 are shifted with respect to the cutting position 365.
  • Figure 12f shows yet another embodiment in which, again, a pre-treated web of material is used which is wound to a log 2 which is shifted after a portion of the web has been wound up. Accordingly, the treated segments 40, 42 are shifted with respect to the cutting position 365.
  • Figure 12g shows yet another embodiment which basically combines the provision of a pre-treated web of material 1, a shifting in a web handler 370 and a cutting step before the web of material is wound to individual rolls of material 50.
  • Figure 12h shows yet another embodiment which basically corresponds to the embodiment shown in Figures but in which the treatment of the web 1 is done in-line. No pre-treated web is used.
  • the hygiene product may be e.g. a toilet paper, household towel or wipe, both for use at home and away from home.
  • the hygiene product may be made of single or multi -ply tissue paper or non-woven or a combination of tissue paper and non- woven.
  • Multi -ply products are often laminated by gluing the plies together, by mechanical ply bonding ⁇ e.g. edge embossing) or by ultrasonic bonding. Embossing of the web is a common technique to improve/change/convert the physical and optical properties of the plies and the final product. Additional perforation is often used to separate the web in single sheets for easy use. Lamination, embossing and perforation as well as other converting techniques can be used in combination with the claimed techniques.
  • 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 up to a maximum of 80 g/m 2 , more preferably to a maximum of 50 g/m 2 .
  • Its density is typically below 0.6 g/cnP, preferably below 0.30 g/cm ⁇ and more preferably between 0.08 and 0.20 g/cm ⁇ .
  • the production of tissue is distinguished from paper production by 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.
  • the high tensile energy absorption index of tissue paper results from a creping process. Creping can be produced by pressing the paper web against a dry cylinder and as a result of the action of a crepe doctor or as a result of a difference in speed between two wires ("fabrics") . This causes the still wet, plastically deformable paper web to be internally broken up by compression and shearing, thereby rendering it more stretchable under load than an uncreped paper .
  • Wet pressed 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.
  • 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) .
  • cleaning wipes such as paper or non-woven wipes, windscreen cleaning wipes, industrial wipes, kitchen paper, or the like
  • sanitary products such as for example toilet paper, paper or non-woven handkerchiefs, household towels, towels, and the like
  • cosmetic wipes such as for example facials and as serviettes or napkins, at least as long as they are distributed in roll form.
  • Figure 13 shows a log 2 in accordance with the prior art.
  • a certain region 400 has been kept explicitly untreated in order to get a lateral end- face without any visible treatments.
  • the images 60 printed on the web of material 1 have been distributed on the web of material such that in the regions 400 no such images 60 had been present .
  • Figure 14 shows another prior art embodiment in which the images 60 have been printed randomly on the web of material 1. Accordingly, in the resulting individual roll of material 50, there were shown on the lateral end-faces 54 spots 600 resulting from images 60 that have been cut in the cutting process. This lateral end-face 54 results in a basically random visual appearance.

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  • Sanitary Thin Papers (AREA)

Abstract

L'invention concerne un procédé destiné à la fabrication d'un produit d'hygiène, le procédé consistant à fournir une bande continue de matériau (1) à enrouler pour former un rouleau de matériau (2, 50), la bande continue de matériau comportant au moins un bord avant (10) et deux bords longitudinaux (12, 14), puis à traiter au moins un segment de la bande continue de matériau avec au moins une substance de traitement. Le segment traité (40, 42) s'étend généralement dans le sens de la longueur (SM) de la bande continue de matériau et comporte au moins une section située à une certaine distance du bord avant de la bande continue de matériau, au moins à une distance correspondant aux enroulements le plus à l'intérieur du rouleau de matériau. Le procédé consiste également à découper la bande continue de matériau à au moins une position de découpage (365) correspondant à la position du segment traité, puis à enrouler la bande continue de matériau pour former un rouleau de matériau, la bande continue de matériau étant enroulée en commençant par le bord avant de la bande continue de matériau.
PCT/EP2007/001759 2007-03-01 2007-03-01 Procédé de fabrication d'un produit d'hygiène et produit d'hygiène ainsi fabriqué WO2008104197A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130193249A1 (en) * 2012-01-31 2013-08-01 Georgia-Pacific Consumer Products Lp Product, Dispenser and Method of Dispensing Product
WO2017214372A1 (fr) * 2016-06-10 2017-12-14 Kimberly-Clark Worldwide, Inc. Essuie-tout résistant à la déchirure
JP7430417B1 (ja) 2022-10-31 2024-02-13 コアレックス信栄株式会社 トイレットペーパーおよびトイレットペーパーの製造方法

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Publication number Priority date Publication date Assignee Title
FR2590149A1 (fr) * 1985-11-20 1987-05-22 Issalene Robert Dispositif pour signaler la fin d'un papier a usage unique
EP0347181A1 (fr) * 1988-06-13 1989-12-20 Georgia-Pacific Corporation Méthode d'indication de l'épuisement d'une serviette en rouleau
DE19959832A1 (de) * 1999-12-10 2001-07-12 Hakle Kimberly De Gmbh Lagenhaftung mehrlagigen, auf einer Rolle konfektionierten Papiers und Verfahren zur Herstellung der Lagenhaftung
WO2006099881A1 (fr) * 2005-03-22 2006-09-28 Sca Hygiene Products Gmbh Methode et appareil de fabrication d'un produit de papier hygienique

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590149A1 (fr) * 1985-11-20 1987-05-22 Issalene Robert Dispositif pour signaler la fin d'un papier a usage unique
EP0347181A1 (fr) * 1988-06-13 1989-12-20 Georgia-Pacific Corporation Méthode d'indication de l'épuisement d'une serviette en rouleau
DE19959832A1 (de) * 1999-12-10 2001-07-12 Hakle Kimberly De Gmbh Lagenhaftung mehrlagigen, auf einer Rolle konfektionierten Papiers und Verfahren zur Herstellung der Lagenhaftung
WO2006099881A1 (fr) * 2005-03-22 2006-09-28 Sca Hygiene Products Gmbh Methode et appareil de fabrication d'un produit de papier hygienique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130193249A1 (en) * 2012-01-31 2013-08-01 Georgia-Pacific Consumer Products Lp Product, Dispenser and Method of Dispensing Product
WO2017214372A1 (fr) * 2016-06-10 2017-12-14 Kimberly-Clark Worldwide, Inc. Essuie-tout résistant à la déchirure
GB2565973A (en) * 2016-06-10 2019-02-27 Kimberly Clark Co Tear resistant wiper
GB2565973B (en) * 2016-06-10 2021-04-28 Kimberly Clark Co Tear resistant wiper
US11406232B2 (en) 2016-06-10 2022-08-09 Kimberly-Clark Worldwide, Inc. Tear resistant wiper
JP7430417B1 (ja) 2022-10-31 2024-02-13 コアレックス信栄株式会社 トイレットペーパーおよびトイレットペーパーの製造方法
WO2024095520A1 (fr) * 2022-10-31 2024-05-10 コアレックス信栄株式会社 Papier hygiénique et son procédé de fabrication

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