EP2021543A1 - Papiers couchés à propriétés améliorées pour des étiquettes - Google Patents

Papiers couchés à propriétés améliorées pour des étiquettes

Info

Publication number
EP2021543A1
EP2021543A1 EP07725258A EP07725258A EP2021543A1 EP 2021543 A1 EP2021543 A1 EP 2021543A1 EP 07725258 A EP07725258 A EP 07725258A EP 07725258 A EP07725258 A EP 07725258A EP 2021543 A1 EP2021543 A1 EP 2021543A1
Authority
EP
European Patent Office
Prior art keywords
paper
coated
base paper
machine direction
iso
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.)
Granted
Application number
EP07725258A
Other languages
German (de)
English (en)
Other versions
EP2021543B1 (fr
Inventor
Hans-Joachim Becher
Andreas Euler
Udo Sündram
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.)
Zanders GmbH
Original Assignee
M Real Oyj
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 M Real Oyj filed Critical M Real Oyj
Priority to EP07725258.3A priority Critical patent/EP2021543B1/fr
Publication of EP2021543A1 publication Critical patent/EP2021543A1/fr
Application granted granted Critical
Publication of EP2021543B1 publication Critical patent/EP2021543B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D21H19/00—Coated paper; Coating material
    • D21H19/72—Coated paper characterised by the paper substrate
    • D21H19/76—Coated paper characterised by the paper substrate the substrate having specific absorbent properties
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D21H15/06—Long fibres, i.e. fibres exceeding the upper length limit of conventional paper-making fibres; Filaments
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/02—Metal coatings
    • 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
    • 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
    • Y10T428/27—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.]
    • Y10T428/273—Web or sheet containing structurally defined element or component, the element or component having a specified weight per unit area [e.g., gms/sq cm, lbs/sq ft, etc.] of coating
    • Y10T428/277—Cellulosic substrate
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • the present invention relates to a coated paper having improved labeling properties and to a method for producing such a paper.
  • Coated papers can be found in a variety of applications. They are often characterized by a very smooth, coated surface on which high-quality prints, especially in the offset printing process can be applied. For example, coated papers are also used for labeling and labeling of goods.
  • One of the main applications is the labeling of bottles.
  • various methods for labeling bottles are known, which among other things, the application of self-adhesive adhesive labels counts, as well as the so-called "wet labeling".
  • an adhesive layer is applied to the back of the already printed label, which is then applied immediately below to the bottle to be labeled.
  • the adhesive usually contains a high content of water and is often built on a casein base.
  • the labeling machines process up to several tens of thousands of bottles per hour, so that a high reliability of the labeling process must be guaranteed.
  • the labels adhere to the bottles immediately after application, otherwise they can slip by further mechanical contact, with, for example, brushes, which serve to press the label of the bottles tight.
  • the surface to be labeled adheresive surface
  • the flat label does not adapts ideally to the curvature despite the brush effect.
  • U.S. Patent No. 5,209,982 discloses a method of making labeling paper for bottles.
  • the label paper is characterized in that on the back of the label on which the label is applied, the adhesive, a coating is present, which improves the suitability of the label for labeling.
  • the coating improves the water absorption of the back, so that penetration of water worsens the stiffness of the base material.
  • strain gauges are produced on the label with the aid of cutting punches, which breaks the inherent rigidity of the label and prevents it from lifting off its corners and edges from the substrate.
  • a disadvantage is the additional process step of cutting punching, as well as the associated mechanical damage to the material.
  • German patent DE 44 15 547 C2 describes a paper label for FIa See, which is printed and applied by means of a glue and whose fibers are primarily aligned in one direction.
  • embossing of the label perpendicular to the fiber direction is proposed, which ensures that the label wraps around adhesive surfaces of even higher curvature more quickly and without any problems.
  • Another disadvantage is the additional process step of embossing, which also leads to a material weakening by fiber breaks in the nonwoven fabric.
  • the prior art also discloses numerous metallized coated papers.
  • EPO 98 368 A2 discloses a cast-coated metallized paper in which, among other ingredients, a synthetic polymer pigment is contained within the cast-coat layer. Due to the specific composition of the cast-coated paper, a subsequent treatment of the cast-coated layer, for example by painting, prior to metallization is thus avoided. On such a cast-coated paper, a metallization can be performed immediately on the high-gloss surface layer, which has a very good metallic luster.
  • Typical of all cast-coated papers is their low densification in the manufacturing process - in contrast to papers whose high-gloss surface layers are obtained by calendering processes, which are accompanied by a very strong compaction in particular of the fiber structure.
  • the low densification of cast-coated papers is associated with high integrity of the paper fiber structure, with high volume (thickness) and high (intrinsic) stiffness of the label, properties that usually worsen the labeling and make it incalculable, uncontrollable.
  • the technical object of the present invention is to provide a paper which has improved labeling properties, in particular in the wet labeling of bottles, from the prior art.
  • the reliability of the labeling process is to be increased by providing an improved paper.
  • the provided on the back with adhesive label should adhere better to the bottle after application to the bottle to be labeled, so that it no longer slips in subsequent Andschreib- and drying steps, or falls off the bottle.
  • the corners and edges of the label should not stick out, but should fully connect to the bottle.
  • Another object of the present invention is to provide a process for producing a cast-coated paper having improved labeling properties. The technical problem is solved by a method for producing a coated paper, comprising the steps:
  • the coated paper of the present invention is a cast-coated paper.
  • coated paper and coated paper are used interchangeably.
  • long-fiber pulp 1 is understood as meaning a pulp having a longer fiber length than, for example, short-fiber pulp.
  • An example of a long-fiber pulp is a needle sulphate or needle sulphide pulp
  • at least 30% by weight are preferred in the base paper at least 35 weight percent and most preferably at least 40 weight percent of long fiber pulp.
  • the water absorption capacity is determined in accordance with ISO 535.
  • ISO 535 defines the so-called "Cobb process”. This determines the water absorption of a paper after it has been exposed to water. In the present case the test test time is 10 seconds. In this case, the paper to be tested is exposed to an excess of water for 8 seconds and after a total of 10 seconds, the excess water is removed by means of a blotter.
  • the base paper of the present invention preferably has a Cobbi 0 of 5 to 15 g / m 2 , more preferably 5 to 13 g / m 2, and most preferably 6 to 10 g / m 2 .
  • the wet stretch parallel to the machine direction is determined by pointing the longitudinal side of the test sample in the machine direction. Accordingly, the machine-direction wet stretch is measured by having the longitudinal side of the sample to be measured transverse to the machine direction.
  • the machine-direction wet stretch is measured by having the longitudinal side of the sample to be measured transverse to the machine direction.
  • Negative wet stretch means that the test strip has shrunk in the measuring direction during the measurement.
  • the base paper contracts when measuring the wet elongation, so that a negative wet stretch is achieved.
  • This negative wet stretch parallel to the machine direction is preferably in the range of 0% to -1.0%, more preferably -0.1% to -1.0%, and most preferably in the range of -0.25% to -1, 0%.
  • the wet elongation is preferably in the range of -0.5% to -1.0%.
  • the wet stretch of the base paper, measured across the machine direction, is preferably not greater than 2.5%, more preferably not greater than 2.0%, in a further preferred embodiment not greater than 1.5%, and most preferably not greater than 1 %.
  • the wet elongation measured transversely to the machine direction is not greater than 0.8%, more preferably not greater than 0.3% and in a preferred embodiment not greater than 0%.
  • the coated paper preferably has essentially the same wet elongation as the base paper used for its production.
  • the wet strains specified for the base paper can be transferred to the coated paper after step c).
  • the wet stretch of the coated paper after step c), measured parallel to the machine direction is 0%.
  • the coated paper contracts when measuring the wet elongation, so that a negative wet elongation is achieved.
  • This negative wet stretch parallel to the machine direction is preferably in the range of 0% to -1.0%, more preferably -0.1% to -1.0%, and most preferably in the range of -0.25% to -1, 0%.
  • the wet elongation is preferably in the range of -0.5% to -1.0%.
  • the wet elongation of the coated base paper after step c), measured transversely to the machine direction is preferably not greater than 2.5%, more preferably not greater than 2.0%, in a further preferred embodiment not greater than 1.5% and most preferably not greater than 1%.
  • the wet elongation measured transversely to the machine direction is not greater than 0.8%, more preferably not greater than 0.3% and in a preferred embodiment not greater than 0%.
  • the base paper gem. ISO 287 an absolute humidity of not less than 2.5%. More preferably, the base paper in step a) has an absolute humidity of not less than 3.0%, more preferably not less than 3.5%, and most preferably less than 4.0%.
  • the weight per unit area of the base paper in step a), measured according to EN ISO 536, can be between 20 and 150 g / m 2 .
  • the basis weight is between 20 and 100 g / m 2 , more preferably between 30 and 90 g / m 2, and most preferably between 40 and 80 g / m 2 .
  • the coated base paper is treated with a high gloss press to obtain a cast-coated paper, wherein the coated base paper gem before entering the high-gloss press an absolute humidity.
  • ISO 287 of greater than 1, 5%.
  • step b) of the process preferably 18 to 30 g / m 2 (oven dry) of the aqueous coating composition are applied to the base paper. More preferably, between 20 and 25 g / m 2 (oven-dry) of the aqueous coating composition in step b) are applied.
  • the coating preferably contains one or more pigments.
  • suitable pigments are kaolin, clay, aluminum hydroxide, white luster, barium sulfate, calcium carbonate, talc, calcined kaolin and titanium dioxide, which pigments can be used individually or in mixtures.
  • An organic pigment, such as e.g. a plastic pigment may also be included in the coating. At least 50% by weight of the pigments used preferably have a particle size of less than 2 ⁇ m.
  • the coating preferably contains a binder which is conventional in the field of the present invention.
  • the binder may be a synthetic or natural binder.
  • Suitable binders are e.g. a styrene-butadiene latex, methyl methacrylate-butadiene latex, styrene-vinyl acetate latex, vinyl acetate-acrylate latex, styrene-acrylate-acrylonitrile latex.
  • styrene-butadiene latex methyl methacrylate-butadiene latex
  • styrene-vinyl acetate latex vinyl acetate-acrylate latex
  • styrene-acrylate-acrylonitrile latex it is also possible to use casein, soybean protein and / or polyvinyl alcohol as a binder.
  • the solids content of the aqueous coating composition before application to the paper web in step b) is preferably 5 to 68% by weight, more preferably 10 to 65% by weight, and most preferably 15 to 65% by weight.
  • the glossy press in step b) of the method may preferably have a backside moistening unit.
  • this backside moistening unit may correspond to what is known to a person skilled in the art.
  • the scaffold cells may be a water press, in which over 2 rollers, the water-containing preparation is applied to the back of the coated base paper.
  • the backside moistening unit is located in the glossy press in front of the cylinder with the mirror-finished surface.
  • the coated base paper is thus moistened on the backside before it is brought into contact with the mirror-finished surface of the cast-coated cylinder.
  • the backside moistening unit tensions in the base paper are solved, so that the labeling behavior of the finished cast-coated paper is further improved.
  • the label in wet labeling nestles even better around the bottles to be labeled.
  • the preferred casting method is not limited in itself.
  • the casting method can be the direct method, rewet method (Rewet method) or the gel method.
  • Rewet method rewet method
  • the coating composition is first applied to the base paper and then dried. Subsequently, the coating is moistened again when entering the high-gloss cylinder, so that after leaving the glossy press, the mirror-smooth surface of the cast-coated cylinder was transferred to the paper.
  • the absolute moisture content of the coated base paper prior to entry into the high-gloss press is 2% to 7%. If, in a preferred embodiment, the so-called “rewetting process” (Rewet process) is used, the product is introduced into the high-gloss Press the time understood before the already coated and dried paper is moistened again. If the glossy press has a backside moistening unit, the absolute humidity of the coated base paper before entering the backside moistening unit is in the specified range.
  • the absolute moisture content of the coated base paper prior to entry into the high gloss press is 2% to 6%, more preferably 2.5% to 4%, and most preferably 2.5% to 3.5%.
  • the coated paper is conditioned.
  • conditioning is understood as the setting of a predetermined equilibrium moisture content of the coated paper.
  • the predetermined equilibrium wetness of the coated paper is preferably 50% relative humidity.
  • the conditioning can be carried out with any aggregate known to those skilled in the art, in particular with a chamber having a preselected relative humidity.
  • the paper web is then passed through such a chamber until the paper web has the desired equilibrium moisture content.
  • the preselected climate in the chamber is adjusted to the desired equilibrium moisture content of the paper.
  • the cast-coated paper is conditioned in an atmosphere having a relative humidity of at least 90%.
  • the conditioning is carried out so that the coated paper after conditioning to an equilibrium moisture content of 50% relative humidity (standard climate) a deviation from the flat, measured parallel to the machine direction, of less than 10 mm in the direction of the coated side (elongation at break) and transverse to the machine direction of less than 10 mm in the direction of the coated side (swelling strain).
  • an equilibrium moisture content of 50% relative humidity standard climate
  • the flatness is preferably determined by the cross-cut method.
  • a 20 x 20 cm square piece is cut out of the paper web. It must be ensured that the direction of travel is indicated on the test paper and that the edges of the test piece are parallel or transverse to the direction of travel. are ordered.
  • a cross-shaped cut of about 18 cm in length is then made diagonally to the corners of the square within the square.
  • the flatness is then checked at the triangular tips of the cuts made. It is determined from the distance of the tips of the support of the test paper, so that the yield strain in millimeters, the distance of the upper and lower tip of the bearing surface of the paper. The swelling strain is accordingly the distance of the tips of the left and right truncated triangle from the point of support of the paper.
  • the elongation at yield is referred to as a mechanical flatness, as it is caused by e.g. a crusher blade can be influenced.
  • the paper web is deformed under train so that sets the desired yield strain.
  • the elongation at break is preferably less than 8 mm in the direction of the coated side, more preferably less than 5 mm in the direction of the coated side, and most preferably less than 3 mm in the direction of the coated side.
  • the yield stretch is 0 mm, which means that the paper does not have stretch elongation.
  • the swelling strain is less than 8 mm to the coated side, more preferably less than 5 mm in the direction of the painted side, and most preferably less than 3 mm in the direction of the painted side.
  • the swelling strain is 0 mm, which means that the paper has no swelling and rests flat on a base.
  • the coated paper After being conditioned in step c), the coated paper preferably has an absolute moisture content. ISO 287 from 2% to 10%, more preferably from 2% to 8%, and most preferably from 2% to 7%.
  • a metal layer can be applied to the coated side of the coated paper. This metal layer can preferably be applied by vapor deposition in a vacuum.
  • the metal layer preferably contains aluminum. More preferably, the metal layer is an aluminum layer.
  • the coated side is painted prior to applying the metal layer to the coated side of the coated paper.
  • the coated side is painted.
  • all coatings which are familiar to the person skilled in the art can be used in order to further smooth the surface of the cast-coated paper.
  • This coating can be applied with any application unit known to those skilled in the art.
  • the coating is applied by a flexographic printing process, wherein the ink can be solvent-based or water-based.
  • a coating is applied to the metal layer after application of the metal layer.
  • any paint can be used, which is familiar to the expert.
  • the coating can be applied with any application unit known to the person skilled in the art, wherein preferably the coating is applied by a flexographic printing process.
  • printing ink both solvent-based inks and water-based inks can be used.
  • the coated paper before applying the metal layer has an absolute humidity gem. ISO 287 from 0.5% to 10%. In a further preferred embodiment, the coated paper has an absolute humidity of from 0.5% to 8%, more preferably from 1% to 7%, more preferably from 1, 5% to 6% and most preferably from 2% before applying the metal layer. until 5 %.
  • a further subject of the present invention is a coated paper comprising a base paper and a coating which is applied to the base paper, the proportion of long fiber pulp in the base paper being at least 25% by weight, the base paper having a water absorption capacity according to ISO 535 in a base paper. has a test time of 10 s (Cobtho) of 5 to 20 g / m 2 , and the base paper has a wet elongation (according to fennel) measured parallel to the machine direction of not greater than 0% and transverse to the machine direction of not greater than 3%, and the coating has a coating weight of from 10 g / m 2 to 40 g / m 2 (oven-dry).
  • the coated paper is preferably a cast-coated paper.
  • the coated paper has a flatness parallel to the machine direction of less than 10 mm in the direction of the coated side (elongation at break) and transverse to the machine direction of less than 10 mm in the direction of the coated side (swelling elongation), measured by the cross-cut method (as described above ).
  • the coated paper is characterized by a leveling behavior in one cycle of conditioning at different relative humidities.
  • the paper which preferably has a size of 10 ⁇ 7 cm (rectangular) is conditioned at different relative humidities.
  • the longer side of the cut-out rectangle is preferably oriented parallel to the machine direction, so that the machine direction (longer side of the rectangle) is not confused with the transverse direction.
  • Swelling Elongation is the distance of the edges from a flat surface of the rectangular test paper measured at the edges aligned parallel to the machine direction.
  • stretch elongation is the removal of the edges from a flat backing which are oriented transversely to the machine direction. Since the present invention is preferably a one-side coated paper, the swelling elongation as well as the elongation at break can point either to the coated or uncoated side of the paper.
  • the paper according to the invention shows a flatness behavior in which
  • the paper has a swell between 5 mm to the uncoated side of the paper and 5 mm to the coated side of the paper,
  • the paper after conditioning to a relative humidity of 80%, has a swelling elongation to the coated side of the paper of 0 to 30 mm,
  • the paper after conditioning to a relative humidity of 45%, the paper has a swell to the uncoated side of the paper of 0 to 10 mm,
  • the paper after subsequent conditioning to a relative humidity of 80% has a swelling elongation to the coated side of the paper from 0 to 30 mm
  • Humidity of 45% has a swell to the uncoated side of the paper from 0 to 10 mm.
  • the coated paper preferably has a so-called "working capacity".
  • the working capacity is the mean of the difference in the swelling expansions of step b) and c) and the difference in the swelling expansions of steps d) and e), the mean value preferably being 2 mm to 40 mm.
  • step b) If, for example, in step b) a swell to the coated side of the paper of 28 mm is measured, in step c) a swell of 8 mm to the uncoated side, in step d) again a swelling to the coated side of the paper of 27 mm and in step e) a swell of 9 mm to the uncoated side of the paper is measured, the working in mm equal to (((28 mm - (-8 mm)) + (27 mm - (-9 mm))) / 2.
  • the cast-coated paper in this example would have a working capacity of 36 mm.
  • the coated paper of the present invention has no elongation at break when passing the flatness cycle described above. Rather, the paper will preferably always show a swell to the coated or uncoated side of the paper with different conditioning.
  • the cast coated paper of the present invention has improved labeling performance over prior art papers.
  • the paper of the present invention lays around the bottle when it is applied to the bottle to be labeled, so that a kind of wrapping of the bottle through the label takes place. This ensures that the label does not slip due to subsequent brushing.
  • the labels adhere more firmly to the bottles due to this wrapping behavior, so that the labels do not fall off in the automatic labeling machine. Therefore, the paper of the present invention enhances the reliability of the labeling process. The standstill times of the labeling machines are reduced because the number of cleaning cycles that would otherwise be necessary to clean the labeling system from falling labels is reduced.
  • the coated paper of the present invention lays around the bottle to be labeled. This also prevents the formation of wrinkles on the label. Even in the event that wrinkles form on the bottle when the label is applied, these wrinkles are smoothed again by wrapping the label around the label. The label is thus flat on e.g. a bottle on.
  • neck labels are labels that are applied to the bottle neck of a bottle. Because the bottleneck is generally a very large deviation from the cylindrical basic shape of the bottle, it is particularly time consuming to attach a precisely fitting label at this point. Surprisingly, the coated paper of the present invention exhibits an improved labeling behavior even at this geometrically very demanding location of a bottle. The coated paper of the present invention conforms exactly to the shape z. B. a bottleneck. Thus, improved machine running occurs during labeling and the applied label does not wrinkle.
  • the label in wet-labeling using the coated paper of the present invention, when the glued-on label is applied to a bottle, it is preferable for the label to be stretched to stretch-stretched toward the uncoated, ie glued side of the label. As a result, the wrap of the e.g. Bottle conveyed by the label. Without wishing to be bound by theory, it is believed that this effect is also due to the wet stretch (after fennel) of the coated paper of the present invention.
  • a metal layer can also be applied to the coating of the coated paper.
  • further layers may be present below the metal layer and / or above the metal layer, which are preferably coatings.
  • the metal layer preferably contains aluminum, which is more preferably vapor-deposited.
  • One-side coated paper is made as follows: In the paper machine, a fiber mixture with the following composition is processed (Table 2):
  • the base paper thus produced has a basis weight of 50 g / m 2 (atro) and an absolute humidity of 3%.
  • the wet stretch after fennel is parallel to the machine direction - 0.1%, transverse to the machine direction 2.4%.
  • the base paper is coated on one side with a pigmented coating composition and subsequently conditioned in a conditioner.
  • the thus prepared coated paper (finished paper) has an absolute humidity of 6%.
  • the finished paper has a water absorption capacity of the uncoated side according to ISO 535 at a test time of 10 s (Cobb-io) of 12 g / m 2 .
  • the finished paper has a flatness, measured parallel and transverse to the machine direction of 0 mm to the coated side, and the wet elongation after fennel, measured parallel to the machine direction, is - 0.1% and transverse to the machine direction 2.4%.
  • This coated paper shows very good behavior during the labeling process (gluing of the label, removal of glue scale). Only when transferring from the gripper fingers of the labeling on the container "jumps" the label of a swelling strain in a yield strain to the back and "clasped” thus the container. Labels that show the behavior described above can be easily labeled on different containers, without it here to wrinkles, protruding corners o.a. Mistakes comes. In addition, favored by the above behavior, up to 10% of the usual amount of glue can be saved.
  • An aluminum-coated finished paper is produced as follows: In the paper machine, a fiber mixture with the following composition is processed (Table 5):
  • the produced base paper has a surface weight of 51 g / m 2 (atro) and an absolute humidity of 3%.
  • the wet stretch after fennel parallel to the machine direction is -0.12% and cross-machine direction 2.4%.
  • the base paper is coated on one side with a pigment-containing coating composition under the following conditions (Table 6).
  • the coated paper produced in this way has an absolute humidity of 2%.
  • Aluminiumbedampfungsstrom In a Aluminiumbedampfungsstrom is applied under high vacuum, a thin layer of aluminum on the coated side of the aforementioned coated paper. The aluminum-coated paper is then conditioned with a separate conditioner.
  • the coated, coated paper (finished paper) produced in this way has an absolute moisture content of 6%.
  • the water absorption capacity of the non-coated side according to ISO 535 at a test time of 10 s (Cobbio) is 11 g / m 2 .
  • the manufactured finished paper has a flatness, measured parallel and transversely to the machine direction of 0 mm.
  • the finished paper thus prepared has a wet elongation to fennel measured parallel to the machine direction is -0.12% and transverse to the machine direction 2.4%.
  • This finished paper shows a very good behavior during the labeling process (gluing the label, removal of glue scale). Only when transferring from the gripper fingers of the labeling on the container "jumps" the label of a swelling strain in a yield strain to the back and "clasped” thus the container. Labels that show the behavior described above can be easily labeled on different containers, without it here to wrinkles, protruding corners o.a. Mistakes comes. In addition, caused by the above behavior, up to 10% of the usual amount of glue can be saved.
  • This example is a one-side painted aluminum-coated label paper with a basis weight of 80g / m 2 .
  • the competition material has an absolute humidity of 5.5% and a water absorption capacity according to ISO 535 with a test time of 10 s (Cobb 10 ) of 8 g / m 2 .
  • the flatness, measured parallel and transverse to the machine direction, is 0 mm to the coated side.
  • the wet elongation after fennel measured parallel to the machine direction is 0.25% and transverse to the machine direction 2.5%.

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  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé pour fabriquer un papier couché selon les opérations suivantes: a) préparer un papier brut ayant une teneur en cellulose à fibres longues d'au moins 25% en poids, ce papier brut ayant une humidité absolue au moins égale à 2,5% selon ISO 287, une aptitude à absorber l'eau de 5 à 20 g/m2 selon ISO 535 sur une période d'essai de 10 s (Cobb10), et un allongement à l'état humide (selon Fenchel) ne dépassant pas 0% s'il est mesuré parallèlement au sens de la machine et ne dépassant pas 3% s'il est mesuré transversalement au sens de la machine; b) appliquer 10 à 40 g/m2 (sec absolu) d'une substance de revêtement aqueuse sur au moins une face du papier brut pour obtenir un papier brut enduit; c) conditionner le papier couché obtenu à l'étape b).
EP07725258.3A 2006-05-23 2007-05-16 Papier couché avec des propriértés d'étiquetage améliorés Active EP2021543B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07725258.3A EP2021543B1 (fr) 2006-05-23 2007-05-16 Papier couché avec des propriértés d'étiquetage améliorés

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20060010595 EP1860235A1 (fr) 2006-05-23 2006-05-23 Papier couché avec des propriértés d'étiquetage améliorés
PCT/EP2007/004342 WO2007134762A1 (fr) 2006-05-23 2007-05-16 Papiers couchés à propriétés améliorées pour des étiquettes
EP07725258.3A EP2021543B1 (fr) 2006-05-23 2007-05-16 Papier couché avec des propriértés d'étiquetage améliorés

Publications (2)

Publication Number Publication Date
EP2021543A1 true EP2021543A1 (fr) 2009-02-11
EP2021543B1 EP2021543B1 (fr) 2015-08-26

Family

ID=37396238

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20060010595 Withdrawn EP1860235A1 (fr) 2006-05-23 2006-05-23 Papier couché avec des propriértés d'étiquetage améliorés
EP07725258.3A Active EP2021543B1 (fr) 2006-05-23 2007-05-16 Papier couché avec des propriértés d'étiquetage améliorés

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20060010595 Withdrawn EP1860235A1 (fr) 2006-05-23 2006-05-23 Papier couché avec des propriértés d'étiquetage améliorés

Country Status (6)

Country Link
US (1) US8202624B2 (fr)
EP (2) EP1860235A1 (fr)
JP (1) JP5156007B2 (fr)
CN (1) CN101454507B (fr)
ES (1) ES2549310T3 (fr)
WO (1) WO2007134762A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4168625A1 (fr) 2020-06-23 2023-04-26 SAPPI Netherlands Services B.V. Papier ou carton protecteur

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Also Published As

Publication number Publication date
WO2007134762A1 (fr) 2007-11-29
CN101454507A (zh) 2009-06-10
US8202624B2 (en) 2012-06-19
JP5156007B2 (ja) 2013-03-06
CN101454507B (zh) 2013-05-29
ES2549310T3 (es) 2015-10-26
EP1860235A1 (fr) 2007-11-28
JP2009537706A (ja) 2009-10-29
US20090301631A1 (en) 2009-12-10
EP2021543B1 (fr) 2015-08-26

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