EP1047546B1 - Geprägte absorbierende papierbahn, herstellungsverfahren und vorrichtung zu dessen herstellung - Google Patents

Geprägte absorbierende papierbahn, herstellungsverfahren und vorrichtung zu dessen herstellung Download PDF

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Publication number
EP1047546B1
EP1047546B1 EP99900511A EP99900511A EP1047546B1 EP 1047546 B1 EP1047546 B1 EP 1047546B1 EP 99900511 A EP99900511 A EP 99900511A EP 99900511 A EP99900511 A EP 99900511A EP 1047546 B1 EP1047546 B1 EP 1047546B1
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EP
European Patent Office
Prior art keywords
sheet
area
areas
embossments
protuberances
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.)
Expired - Lifetime
Application number
EP99900511A
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English (en)
French (fr)
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EP1047546A1 (de
Inventor
Gilles Roussel
Rémy Ruppel
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 Operations France SAS
Original Assignee
Georgia Pacific France SAS
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Filing date
Publication date
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Publication of EP1047546A1 publication Critical patent/EP1047546A1/de
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Publication of EP1047546B1 publication Critical patent/EP1047546B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21H27/30—Multi-ply
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0728—Material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0733—Pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0738—Cross sectional profile of the embossments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0756—Characteristics of the incoming material, e.g. creped, embossed, corrugated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0766—Multi-layered the layers being superposed tip to tip
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1023—Surface deformation only [e.g., embossing]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24446—Wrinkled, creased, crinkled or creped
    • Y10T428/24455—Paper
    • Y10T428/24463—Plural paper components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet

Definitions

  • the present invention relates to the field of absorbent papers for use sanitary or domestic, and targets a sheet, consisting of at least one embossed fold, intended for the production of toilet paper essentially, but also of handkerchiefs, towels or kitchen towels.
  • embossing operation is done either on paper with high humidity, that is to say in the wet part of the paper machine, either on paper with low humidity, i.e. transformation.
  • the present invention relates to processed paper partly dry.
  • embossing patterns consist of a repetition on a geometric basis of elementary protuberances of small cross section and simple geometric shape.
  • An example is described in US Pat. No. 3,414,459 which relates to a laminated sheet made up of a plurality of elementary sheets, called plies, glued together.
  • the folds are embossed with a frequency of distribution of the protrusions and a height of the protrusions adapted to the production of water-absorbing products, for example paper towels.
  • the number of elements ranges from 5 to 30 per cm 2 .
  • the Applicant has developed, for toilet paper in particular, patterns with a higher number of elements, ranging from 30 to 80 per cm 2 .
  • the elements can be inscribed in a polygon from 2 to 6 cm 2 .
  • An exemplary embodiment is described in patent EP 265,298.
  • the protuberances forming these elements have an elongated cross section with vertices of linear configuration.
  • the curves thus drawn are preferably closed and give the elements of the pattern a quilted appearance.
  • these elements are relatively spaced from each other. Large smooth areas are thus spared, the softness of which is therefore not affected by the embossing.
  • This set of features of the pattern helps to give the paper qualities of softness and softness that are perceived by the consumer.
  • the impact of this type of pattern on the physical characteristics is limited.
  • the thickness is little altered. It is found in fact that the yield of the embossing operation is lower. It is necessary to engrave the cylinders to a relatively great depth in order to gain some thickness gain.
  • the Applicant has proposed with the application FR 94 15196 of December 16, 1994 to produce a sheet having a graphic pattern, composed of protuberances of linear shape, combined with a background pattern composed of small protuberances.
  • the width of the protrusions of linear form is between 0.1 and 2 mm, and they are relatively spaced from each other.
  • the small protuberances generally frustoconical, are arranged at a rate of at least 30 per cm 2 .
  • the background pattern provides most of the functional characteristics related to embossing, namely thickness and absorption in particular.
  • the high density of the protrusions of the background pattern also gives a textile appearance, pleasing to the eye.
  • the protrusions of the background pattern bring out the main pattern because they are not easily visible individually with the naked eye because of their necessary small size.
  • Their surface at the top is less than 1 mm 2 . This contrast results, more particularly, from the high ratio, greater than 50, between the surface of a graphic motif element and that of a small protuberance, and from the high number of small protuberances per unit of surface.
  • the object of the invention is to provide a sheet of absorbent paper having, by compared to this last achievement in particular, the advantage of a better definition of the patterns that we want to highlight on the background pattern.
  • the invention relates to a sheet of absorbent paper, in particular of cellulose wadding of grammage between 10 and 40 g / m 2 with a first embossed zone, of the type obtained by embossing between a non-deformable cylinder comprising protuberances and a cylinder with deformable coating such that said sheet has bosses of a particularly frustoconical shape on one face, the vertices of which are arranged substantially in the same plane, said bosses corresponding to depressions on the opposite face, the first embossed zone forming a weft pattern of bottom, the number of bosses of height H1 with respect to said plane, being greater than 30 per cm 2 , said sheet comprising at least one second pattern formed by second boss-free zones formed inside the first embossed zone, height H2 with respect to said plane being greater than H1, characterized in that the average diameter of the discs writable in the second my boss-free areas is greater than twice the average diameter of writable discs between the
  • a boss is considered to be isolated if the average height H of the portion of the sheet which the surround is greater than the height H1 of the frame area. It is thus distinguished from a boss . of the frame area whose average height of the sheet which surrounds it is precisely H1.
  • the absorbent paper sheet may be composed of only one thickness or fold, but the invention also covers the embodiments where the sheet is made of several thicknesses of cellulose wadding embossed together.
  • H1 and H2 are mean values calculated from a number of statistically relevant measures.
  • the pattern is well marked when the deformation of the sheet is sufficient for the height H2 to be greater than 1.2 times H1 after the operation embossing.
  • the average diameter of the discs writable in the boss-free areas of the graphic pattern is greater than mean diameter of the writable discs between the bosses of the weft area, preferably the first diameter is greater than twice and in particular three times the second.
  • a disc is said to be writable in a given portion of the surface if it can be placed inside it while being tangent to three bosses which belong to the border of this surface portion.
  • the tops of the isolated bosses are of the same dimension as those of the bosses of the first zone.
  • this particular arrangement offers the advantage of greater unity pattern and enhances the contrast effect because the protrusions of the embossing cylinder, being of small dimension, concentrate the stresses and exert a marking more pronounced on the sheet at the time of embossing. Finally, the realization of the engraving is easier than if the protrusions were of different dimensions. We can use only one tool.
  • the boss-free zones of the second pattern have at least one portion of calendared surface. Calendering results from the action of the rubber cylinder which presses against the bottom of the engraving. There is then a smoothing of the surface by removal of the roughness. Calendering improves softness, especially if this portion is large enough to promote touch.
  • the calendered surface portion preferably has an extent of at least 1 cm 2 corresponding substantially to the skin portion of the end of a finger which comes into contact with the sheet when it is taken in hand.
  • the sheet of absorbent paper comprises two sheets, at least one of which is one of said absorbent sheets. These are assembled one on the other with the bosses inside the structure.
  • the association mode of the two sheets can be arbitrary: knurling for example, or collage.
  • the latter also includes the "hotmelt" collage or cold with a PVA type glue for example.
  • We can offset the fold one by relation to each other so that the graphic patterns do not coincide perfectly and obtain a partial association between the folds. We can thus modulate the association and stiffen or soften the sheet according to the number of zones of point-to-point associations that we let exist. Finally the folds can have different patterns.
  • the invention also relates to the machine and to the method for manufacture of a sheet according to the invention.
  • the machine is characterized in that it comprises at least one non-deformable cylinder comprising a first zone with at least 30 protuberances, in particular frustoconical, per cm 2 and at least two second zones of graphic pattern not including any, and the depth relative to the coast of the peaks of the protrusions is at least equal to that of the first zone, the average diameter of the discs writable in the second zone being greater than that of the discs writable in the first zone, the two second zones of graphic pattern being adjacent and separated from each other by isolated protuberances forming an alignment.
  • the machine comprises a cylinder with resilient coating capable of cooperating with said non-deformable cylinder, and of which the impact properties are such that in operation the resilient material can come into contact with the bottom of the second zones without coming into contact with the bottom of the first zones.
  • the process for manufacturing a sheet consists of embossing the sheet with by means of cylinders with resilient coating by applying sufficient pressure to that the deformation of the sheet in the graphic pattern areas leads, account given the elastic recovery of the paper, at a final height locally greater than that of the screened area.
  • the sheet shown in FIGS. 1 and 2 comprises two superposed folds 10 and 20 each of which is for example made of creped cellulose wadding, with a grammage between 10 g / m 2 and 40 g / m 2 .
  • the two plies were embossed separately and joined together to form a double sheet.
  • the external faces of the two folds constitute the external faces of the double sheet.
  • Figure 1 is a top view and each point represents a depression at the surface of the leaf. These depressions are crater-shaped, and were obtained by the embossing operation. Thus at each depression on one side of the folds 10, 20 corresponds a protuberance or boss on the other face.
  • Figure 2 we see the sheet in perspective from a section AA in Figure 1.
  • the bosses 110 and 120 are arranged inside the structure, vertices against vertices. In the example shown the two folds are identical.
  • the bosses have a frustoconical shape and their section parallel to the surface of the sheet is circular.
  • the section can also be oval, polygonal or other. Instead of being simply tapered their shape can be more complex.
  • figure 2 can for example have a portion frustoconical and a cylindrical portion.
  • the drawing of figure 2 represents a case particularly with a perfect coincidence of the bosses.
  • all bosses do form a bond, some are free at least partially. They are not therefore not in tip-tip position.
  • first area embossed, or weft pattern of bottom T, of defined thickness, H1.
  • H1 we measure the thickness of this area by the difference level between the plane of the external face of the sheet, and the defined reference plane P by the tops of the bosses 110, 120.
  • second zones forming a graphic pattern G.
  • Each second zone G1, G2, etc. is delimited by bosses of the first zone. These are 110L, 120L selvedge bosses.
  • a second zone besides its absence of bosses, is characterized by a thickness H2.
  • the thickness H2 of this area is measured by the difference in height between the same plane P and the plane tangent to the external face of the sheet in this zone, parallel to the plane P.
  • the thickness H2 is greater than the thickness H1.
  • the ratio of H2 to H1 is advantageously greater than 1.2 (H2 greater than minus 20% at H1). In fact, the higher the ratio, the better the contrast.
  • the 110L bosses designated selvedge bosses or selvedge depressions depending on whether considers the external or internal face, have a shape which is distinguished from that of the others weft area bosses which helps to more markedly mark the border between zones G and T. Indeed, due to the difference in level between the external planes of G and T, the wall of the edge depressions presents a extension of the side of the adjacent G zone. This results in an optical effect of contrast. It has been observed that it is sufficient that this level difference exists after the embossing operation. We were indeed surprised to find that the contrast effect persisted even after some crushing of the structure resulting for example from rolling up the sheet.
  • an embossing density greater than 30 bosses per cm 2 preferably greater than 60 bosses per cm 2 , is chosen for the weft area. Below a density of 30 the spacing between the bosses becomes relatively large and produces a network effect and not a shading.
  • the graphic motif can consist of discrete elements arranged in a repeating pattern on the sheet as shown in the figures.
  • the average diameter of the writable discs is at least twice, in particular five times, that of a recordable disc between the bosses of the frame area.
  • the graphic pattern consists a continuous pattern such as a grid.
  • the width of the area between two rows of edge depressions should not be too narrow to ensure the formation of a level difference between the grid area and the grid.
  • most small writable disc inside the graphics area must also have preferably a diameter at least equal to twice that of a writable disc between the bosses in the frame area.
  • each element of the graphic pattern is composed of two or more second zones G'1, G'2, G'3, G'4, G'5, ... adjacent, thus forming a third zone G '.
  • two adjacent areas G'1 and G'2 are separated by isolated bosses 210S forming an alignment, preferably single.
  • these bosses have a diameter at the top which is not different from the zone of frame; and in particular, the distance between the bosses between them in alignment corresponds to the not from the frame area.
  • This or these additional alignments are intended to refine and strengthen the definition of the graphic motif. A satisfactory result is obtained by not differentiating from the definition of the frame.
  • this underlining effect produced by the alignment of isolated bosses results from the greater relative depth of these depressions compared to those of the screened area. This is due to the fact that the summit protuberances is on the same level as the others;
  • FIG. 5 shows a machine for converting cotton wool cellulose for the production of, for example, toilet paper.
  • This machine includes two embossing units each consisting of a cylinder A1 respectively A2, non-deformable, for example steel, provided with protrusions and a cylinder C1 respectively C2 with resilient coating such as rubber.
  • Two sheets 1 and 2 from a spool of cellulose wadding are individually guided through the embossing interval of a unit A1, C1 respectively A2, C2 then are associated by passage between cylinders A1 and A2 which roll over each other so as to form a single sheet with two folds.
  • the arrangement is of the type points against points but other arrangements are possible, that with interlocking of protrusions for example.
  • we can link the two folds by bonding but also mechanically, by knurling for example.
  • the folds are deformed so as to present frustoconical bosses on the face which comes into contact with the cylinder rubber and crater-like depressions on the face of the fold that is in contact with the rigid cylinder.
  • the invention also relates to the mode of embossing the folds.
  • FIG. 6 shows the deformation of a cellulose wadding sheet produced during the embossing operation according to the prior art.
  • the pressure exerted by the rubber cylinder C and the elastic properties of the material constituting its coating determine, for a given pattern, the penetration depth of the latter inside the engraving.
  • the figure schematically represents the deformation produced on a cellulose wadding sheet by a pattern according to patent application FR 9415196.
  • This figure represents a section, along the axis of rotation of the cylinders, of the area of contact between a rubber cylinder C and a steel cylinder A with the sheet F interposed between the two.
  • the cylinder A is provided with small protrusions P 1 constituting a weft pattern and protrusions P 2 , in relief with respect to the latter. Due to the small spacings between the protrusions, the rubber does not penetrate to the bottom of the engraving. There is a competition between the protuberances of the graphic pattern on the one hand and those P 1 on the background on the other hand. The latter being more embossing, the marking of the graphic pattern is not very effective.
  • the protrusions of the cylinder are chosen. embossing to define first and second areas;
  • a first zone is composed of at least 30 protuberances per cm 2 . These have a generally frustoconical shape but can also have a frustoconical shape at the base and cylindrical towards the top.
  • the section can be circular, oval, polygonal or other.
  • the height is sufficient to allow the deformation of the rubber around each pin. This deformation is limited, however, by the characteristics specific to the rubber used and by the spacing between the pins. This spacing as well as their surface at the top which is of the order of mm 2 are determined by the relatively high density which is intended to impart a woven appearance to this area.
  • a second zone is defined as not comprising a spike. Furthermore his extent is sufficient to allow penetration of the rubber, under the conditions normal operating conditions, at a depth greater than that of a first zone. In practice, for a rubber-coated cylinder whose material has for example a hardness of 45 shore A, the extent of a second zone is such that the average diameter of the writable discs inside this area is greater twice that of recordable discs between three protrusions of the screened area adjacent.
  • zones can be created in a simple way by engraving or machining uniformly a cylinder according to a weft pattern to constitute the first zones then in removing by machining the pins present in the seconds that we choose.
  • An engraving according to the invention is shown in section in FIG. 7, and the deformation produced on a cellulose wadding sheet during the embossing.
  • To the surface of the cylinder there are two first T zones separated by a second zone G.
  • the sheet deforms under the action of the pressure exerted by the cylinder rubber.
  • the rubber does not exactly follow the profile of engraving. Due to the small spacing between the pins, the rubber cannot reach the bottom in the T zones. It thus reaches a depth Hg, less than the depth of the engraving, which is a function of the space available between the pins and of the applied load, which can be characterized by an efficiency Rp (Rp is lower to 1).
  • this embossing method leads to more marking pronounced edge protrusions L because the sheet undergoes at this point a greater deformation than around the pins of the frame. This difference contributes to strengthening the contrast effect between the T and G zones.
  • a sufficient range is chosen for the second zone so as to allow the rubber to rest on the surface of the background. This part of the sheet then undergoes a calendering and smoothing effect.
  • two groups are grouped or several second zones. Two second adjacent zones are then separated by a row of isolated pins. In such a case we see that the line of protrusions separating two second zones also has a pronounced marking.
  • FIG. 8a the first bottom area T and the second zone G of different levels with a selvedge boss 110L. on the face 8b, we recognize in addition an isolated boss 210S.
  • a sample B3 was also carried out on a pattern representing a grid, the minimum width of the second zone of which was equal to twice the average diameter of the discs writable in the adjacent screened zone, and ensuring that the rubber then touched the bottom. of engraving.
  • the height was measured in several places on the samples from a photograph with a magnification of 56.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Paper (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (10)

  1. Blatt saugfähigen Papiers, insbesondere aus Zellstoffwatte mit einer Flächenmasse von 10 bis 40 g/m2, mit einer ersten Prägezone (T) von der Art, die durch Walzprägen zwischen einem nicht verformbaren Zylinder, der Vorsprünge aufweist, und einem Zylinder mit verformbarer Beschichtung so erhalten wird, dass das Blatt auf einer Seite insbesondere kegelstumpfförmige Erhebungen (110, 120) aufweist, deren Scheitelpunkte im Wesentlichen in einer selben Ebene (P) angeordnet sind, wobei diese Erhebungen Vertiefungen auf der entgegengesetzten Seite entsprechen, wobei die erste Prägezone (T) ein Druckmustergrundraster bildet, dessen Anzahl an Erhebungen mit einer Höhe H1 auf die Ebene (P) bezogen mehr als 30 pro cm2 beträgt, wobei das Blatt mindestens ein zweites Druckmuster (G) bildet, das aus mindestens zwei zweiten Zonen (G'1, G'2 ...) mit einer Höhe H2 ohne Erhebungen umfasst, die im Inneren der ersten Prägezone (T) ausgebildet sind, wobei die Höhe H2 auf die Ebene (P) bezogen, größer als H1 ist, dadurch gekennzeichnet, dass der mittlere Durchmesser der einzeichenbaren Scheiben in den zweiten Zonen ohne Erhebung (G'1, G'2) zweimal größer als der mittlere Durchmesser der einzeichenbaren Scheiben zwischen den Erhebungen der Grundrasterzone (T) ist, und dadurch, dass die beiden zweiten Zonen (G'1, G'2) nebeneinander liegen und voneinander durch einzelne Erhebungen (210S) abgegrenzt sind, die eine Reihe bilden.
  2. Blatt saugfähigen Papiers nach Anspruch 1, dadurch gekennzeichnet, dass die Höhe einer zweiten Zone ohne Erhebung H2 > 1.2*H1 beträgt.
  3. Blatt saugfähigen Papiers nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die Scheitelpunkte der einzelnen Erhebungen (210S) die gleiche Abmessung haben wie diejenigen der Erhebungen (110, 120) der ersten Zone.
  4. Blatt saugfähigen Papiers nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine zweite Zone mindestens einen kalandrierten Oberflächenabschnitt aufweist.
  5. Blatt saugfähigen Papiers, dadurch gekennzeichnet, dass es mindestens zwei Blätter aufweist, wovon mindestens eines durch mindestens einen der vorhergehenden Ansprüche abgedeckt ist, und die so miteinander verbunden sind, dass sich die Erhebungen im Inneren der Struktur befinden.
  6. Blatt saugfähigen Papiers nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass die beiden Lagen teilweise miteinander verbunden sind.
  7. Maschine zur Herstellung eines Blatts nach einem der vorhergehenden Ansprüche, umfassend mindestens einen nicht verformbaren Zylinder (A1, A2), der eine erste Zone (T) mit mindestens 30 Vorsprüngen pro cm2 und mindestens zwei zweite Zonen (G) ohne Vorsprünge umfasst, deren Tiefe auf das Maß der Scheitelpunkte der Vorsprünge bezogen zumindest gleich derjenigen der ersten Zone ist, dadurch gekennzeichnet, dass der mittlere Durchmesser der in die zweiten Zonen einzeichenbaren Scheiben größer ist als derjenige der in die erste Zone einzeichenbaren Scheiben, wobei die beiden zweiten Zonen nebeneinander liegen und untereinander durch die Vorsprünge getrennt sind, die eine Reihe bilden.
  8. Maschine zur Herstellung eines Blatts nach Anspruch 8, dadurch gekennzeichnet, dass sie einen Zylinder mit nachgiebiger Beschichtung umfasst, der mit dem nicht verformbaren Zylinder zusammenwirken kann, und dessen Nachgiebigkeitseigenschaften dergestalt sind, dass im Betrieb das nachgiebige Material mit dem Grund der zweiten Zonen in Berührung kommen kann, ohne mit dem Grund der ersteh Zonen in Berührung zu kommen.
  9. Prägeverfahren für ein Blatt saugfähigen Papiers, insbesondere aus Zellstoffwatte mit einer Flächenmasse von 10 bis 40 g/m2, zwischen einem nicht verformbaren Zylinder, der mit verteilten Vorsprüngen ausgestattet ist, um eine erste Zone zu bilden, die ein Druckmustergrundraster mit mindestens 30 Vorsprüngen pro cm2 und mindestens zwei zweite Zonen ohne Vorsprung bildet, die nebeneinander liegen und voneinander durch einzelne Erhebungen abgegrenzt sind, die eine Reihe bilden, und einem Zylinder mit einer nachgiebigen Beschichtung, dadurch gekennzeichnet,.. dass, da der mittlere Durchmesser der in die zweiten Zonen einzeichenbaren Scheiben zweimal größer ist als die in die erste Zone einzeichenbaren Scheiben, das Verfahren darin besteht, Gummi ins Innere der Prägung der ersten Zone bis zu einer ersten Tiefe eindringen zu lassen, und den Gummi auf der zweiten Zone bis zu einer größeren Tiefe eindringen zu lassen, derart, dass die Resthöhe des Blatts in der zweiten Zone bezüglich der ersten Zone eine größere Höhe aufweist.
  10. Herstellungsverfahren für ein Blatt nach Anspruch 10, dadurch gekennzeichnet, dass die nachgiebige Beschichtung über eine ausreichende Tiefe verformt wird, damit das Blatt mit dem Grund der Prägung der zweiten Zone in Berührung kommt.
EP99900511A 1998-01-13 1999-01-11 Geprägte absorbierende papierbahn, herstellungsverfahren und vorrichtung zu dessen herstellung Expired - Lifetime EP1047546B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9800230A FR2773564B1 (fr) 1998-01-13 1998-01-13 Feuille de papier absorbant gaufre, son procede de fabrication et dispositif permettant de la fabriquer
FR9800230 1998-01-13
PCT/FR1999/000029 WO1999036253A1 (fr) 1998-01-13 1999-01-11 Feuille de papier absorbant gaufre, son procede de fabrication et dispositif permettant de la fabriquer

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EP1047546A1 EP1047546A1 (de) 2000-11-02
EP1047546B1 true EP1047546B1 (de) 2003-12-03

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US (1) US6524683B1 (de)
EP (1) EP1047546B1 (de)
AT (1) ATE255494T1 (de)
DE (1) DE69913315T2 (de)
DK (1) DK1047546T3 (de)
ES (1) ES2212518T3 (de)
FR (1) FR2773564B1 (de)
TR (1) TR200002028T2 (de)
WO (1) WO1999036253A1 (de)

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EP1270196B1 (de) * 2001-06-29 2006-03-29 Georgia-Pacific France Verfahren zur Herstellung von geprägtem Papier und Prägezylinder
DE60133828T3 (de) 2001-12-12 2011-06-22 Georgia-Pacific France Mehrlagige Bahn eines saugfähigen Papiers
EP1331308A1 (de) * 2002-01-25 2003-07-30 Georgia-Pacific France Gekrepptes Blatt eines saugfähigen Papiers, Prägewalze wie auch entsprechendes Verfahren
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US7314663B2 (en) * 2003-09-29 2008-01-01 The Procter + Gamble Company Embossed multi-ply fibrous structure product and process for making same
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Also Published As

Publication number Publication date
DK1047546T3 (da) 2004-04-13
DE69913315D1 (de) 2004-01-15
DE69913315T2 (de) 2004-10-14
US6524683B1 (en) 2003-02-25
EP1047546A1 (de) 2000-11-02
WO1999036253A1 (fr) 1999-07-22
FR2773564B1 (fr) 2000-02-11
FR2773564A1 (fr) 1999-07-16
ATE255494T1 (de) 2003-12-15
ES2212518T3 (es) 2004-07-16
TR200002028T2 (tr) 2000-12-21

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