EP1039025B1 - Sheet having a skin touch, printable at high rate, process for making the same, and packaging made therewith - Google Patents

Sheet having a skin touch, printable at high rate, process for making the same, and packaging made therewith Download PDF

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Publication number
EP1039025B1
EP1039025B1 EP00400828A EP00400828A EP1039025B1 EP 1039025 B1 EP1039025 B1 EP 1039025B1 EP 00400828 A EP00400828 A EP 00400828A EP 00400828 A EP00400828 A EP 00400828A EP 1039025 B1 EP1039025 B1 EP 1039025B1
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EP
European Patent Office
Prior art keywords
sheet
parts
paper
face
range
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
EP00400828A
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German (de)
French (fr)
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EP1039025A1 (en
Inventor
Philippe Baretje
Gilles Gesson
Philippe Noblet
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ArjoWiggins Rives
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ArjoWiggins Rives
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Publication of EP1039025A1 publication Critical patent/EP1039025A1/en
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Publication of EP1039025B1 publication Critical patent/EP1039025B1/en
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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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • 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
    • D21H21/50—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 form
    • D21H21/52—Additives of definite length or shape
    • D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
    • 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
    • D21H27/10—Packing paper

Definitions

  • the present invention relates to a sheet having a feel reminiscent of the skin and printable at high rates. It relates in particular to a packaging sheet having a characteristic in connection with the product to be packaged, and more particularly for luxury packaging for cosmetics. It also relates to the method of manufacturing the sheet and the packaging and the package itself.
  • Packaging especially luxury for cosmetics, is made from sheets of paper or cardboard that can be colored, embossed or grained, and bearing prints with patterns, the brand of the product and the name of the laboratory or perfumer. manufacturer. These packages are distinguished mainly by the visual effect resulting from the prints and if necessary the grain of the sheet.
  • the Applicant was particularly interested in providing a packaging sheet which would include a characteristic that would recall one of the essential characteristics of the product to be packaged, in particular for cosmetic products to be applied to the skin.
  • the Applicant then proposes to provide a characteristic that evokes the destination, namely the skin, ie the touch, the softness of the skin.
  • the Applicant has found that a "skin" feel can be obtained by applying to the sheet surface a layer which comprises expandable thermoplastic microspheres.
  • the rates are of the order of 8000 or even up to 15000 sheets per hour on offset printing machines.
  • the sheets on the other side face is receptive to glues so that they are able to be transformed into boxes for example.
  • the invention provides a sheet having on one of its faces a touch reminding the skin, said face-face, and being printable at high rates, said sheet comprising a support sheet coated on one of its faces with a layer comprising at least expanded thermoplastic microspheres and a binder, forming said front face and the back side having a friction coefficient improving treatment composition, in amounts between 0.1 and 5 g / m 2 , and said sheet having a coefficient static friction between said front face and the other reverse side less than 0.95, preferably less than or equal to 0.90, measured according to standard NF-Q-03-082 with a pad of 200g.
  • the coefficient of static friction reflects the ability of the sheet to lock at the start of a displacement; the higher it is, the more difficult the movement of a leaf in a pile will begin.
  • the invention is characterized in that said sheet has a grammage of between 70 and 500 g / m 2 , preferably between 200 and 400 g / m 2 .
  • the invention is characterized in that said support sheet is transparent or translucent. More particularly said support sheet is a sheet of tracing paper. Tracing paper means a paper as defined by International Standard ISO 4046-1978 in 6.94. More particularly, the invention is characterized in that said support sheet is a sheet of tracing paper, in particular obtained by a thorough refining of the cellulose fibers component.
  • the invention is characterized in that the weight of said layer of the front face is between 6 and 20 g / m 2 dry, preferably between 8 and 17 g / m 2 .
  • the invention is characterized in that said microspheres are expanded thermoplastic spheres comprising a gas.
  • the thermoplastic envelope of these microspheres is based on a copolymer of vinylidene chloride and acrylonitrile.
  • microspheres are expanded thermoplastic spheres at a temperature between 90 and 115 ° C, preferably between 100 and 110 ° C.
  • the invention is characterized in that the reverse side comprises a treatment composition improving friction coefficients, in particular static, in amounts of between 0.1 and 5 g / m 2 , preferably between 0.3 and 3 g / m 2. m 2 .
  • the treatment composition of this other reverse side comprises a compound chosen from gluing agents, in particular from alkyl ketene dimers, polyolefin waxes, in particular polyethylene waxes and preferably in admixture with a binder used in the paper industry, in particular a starch or polyvinyl alcohol and possibly a rheology agent.
  • a rheology agent may for example be carboxymethylcellulose.
  • the invention is characterized in that at least one of the faces comprises an ionizable salt, in particular sodium chloride. It improves the dissipation of electrostatic charges.
  • This salt may be added in aqueous solution optionally mixed with a binder used in paper industry, in particular an alcohol starch or poly (vinyl) and / or a dye, in particular by means of an impregnator. The dye may make it possible to perfect the coloration of the support.
  • the ionizable salt may also be added at the same time as the previous composition applied to the reverse side.
  • the invention is characterized in that the support sheet, at least under the layer of microspheres, has a color and / or a layer and / or print (s) visible (s) through said layer .
  • the application of the layer of microspheres can be done by a coating means known in the paper industry and more particularly by an air knife coater or by a film transfer gluing machine in particular double-sided which allows to treat two faces at the same time as the "TWIN HSM" press of BTG.
  • the invention also relates to the process for obtaining the sheet.
  • step b) is carried out on a gluing press and step c) on an air knife coater.
  • step b) is performed on a double-sided film transfer sizing machine.
  • step a) the cellulose fibers are refined to a high degree of refining, preferably greater than or equal to 90 ° SR.
  • the invention also relates to the use of a sheet as described above to manufacture a skin cosmetic packaging having an essential characteristic recalling the destination of the product to be wrapped by a skin-touch, the face comprising said expanded microspheres forming the outer face of said package.
  • the invention also relates to a packaging for cosmetic products for the skin having an essential characteristic reminding the destination of the product to be packaged by a skin feel obtained from a sheet as described above.
  • the front face of the sheets to be printed can be by various known printing means, in particular by offset printing, by screen printing and is able to receive gilding hot.
  • a rheology regulating agent is optionally added.
  • Sheets are made as in Examples 1 to 3, but the level of microspheres in the layer is varied for a given layer weight of 10 g / m 2 as shown in Table 2.
  • Sheets are made as in Examples 1 to 3 but for a given microsphere level in the layer and for a given layer weight, the expansion temperature of the microspheres is varied as shown in Table 2.
  • a sheet of black paper having a basis weight of 290 g / m 2 is formed on which a composition in an aqueous medium containing a starch is applied by means of a sizing press. and an alkylketene dimer (AKD) at a rate of 0.8 g / m 2 by dry weight, the sheet is dried and then impregnated with an aqueous composition of a mixture of starch and sodium chloride (0.1 parts by weight per 100 parts of aqueous composition).
  • an air knife coater 12 g / m 2 dry was applied to a composition comprising microspheres as described below.
  • the thus treated sheet is dried at about 100-110 ° C to dry the sheet and expand the microspheres.
  • the sheet is wound as production progresses.
  • a rheology regulating agent is optionally added.
  • the reel sheet is cut into sheets of a certain size and stacked. Then the sheets in formats are printed sheet by sheet of 10,000 sheets per hour on an offset printing machine, so without affecting the usual rate of printing.
  • the printed sheet may be processed by cutting and gluing into a packaging box for a cream pot for the skin for example, the outer face of the package being the side having the layer with the microspheres.
  • a sheet of paper having a basis weight of 320 g / m 2 is formed , then in line, using a double-sided film transfer sizing machine, called TWIN HSM of the BTG company, one of the faces, at a rate of 3 g / m 2 in dry weight, is treated with an aqueous composition of a mixture comprising a starch and an alkyl ketene dimer (AKD) and the mixture is treated simultaneously.
  • another side at 15 g / m 2 dry, with a composition comprising microspheres as described below.
  • the thus treated sheet is dried at 100-110 ° C to dry the sheet and expand the microspheres.
  • the sheet is wound as production progresses.
  • a rheology regulating agent is optionally added.
  • the sheets in formats are printed sheet by sheet of 10,000 sheets per hour on an offset printing machine without affecting the usual printing rate.
  • the printed sheet may be processed by cutting and gluing into a packaging box for a cream pot for the skin for example, the outer face of the package being the side having the layer with the microspheres.
  • a sheet of tracing paper obtained by fine refining of cellulose fibers (at a degree of refinement of at least 90 degrees SR) having a basis weight of 140 g / m 2 is applied to using a laboratory gluing press, a composition of an alkyl ketene dimer in an aqueous medium called AKD mixed with a starch binder and optionally a rheology regulating agent, at a rate of 3.5 g / m 2 in dry weight, the sheet is dried.
  • AKD alkyl ketene dimer in an aqueous medium
  • a rheology regulating agent at a rate of 3.5 g / m 2 in dry weight
  • the sheet is dried.
  • Using a MEYER bar is applied a composition comprising expandable microspheres and an acrylic binder and optionally a rheology regulator at a rate of 10 g / m 2 .
  • This composition does not include mineral fillers.
  • the reel sheet is cut into sheets of a certain size and stacked. Then the sheets in formats are printed sheet by sheet of 10,000 sheets per hour on an offset printing machine without affecting the usual printing rate.
  • the printed sheet may be converted by cutting and gluing into a package for a cream pot for the skin for example, the outer face of the package being the side having the layer with the microspheres.
  • Example 7 foamed at 120 ° C., has a coefficient of static friction that is too high.
  • Examples 2 and 3 as well as 5 and 6 have the desired "skin" feel and have a static coefficient of friction of less than 0.95.
  • Example 2 Example 3 Microspheres (% dry weight) 0 7 7 7 Drying temperature (° C) - 100 100 100 Weight of layer (g / m 2 ) - 5.3 10.5 15.4 Touch "skin” - NO okay okay Bendtsen roughness (ml / min) - 471 436 433 Zwick Compressibility (%) 14.10 14.4 14.35 15.8 Elastic recovery (%) 81.3 76.8 77.0 65.5 Static friction coefficient without backside treatment - 0.82 0.95 0.87 Static friction coefficient - 0.72 0.90 0.57 Dynamic friction coefficient without backside treatment - 0.66 0.95 0.87 Dynamic friction coefficient - 0.43 0.90 0.60 REFERENCES Comparative Example 4
  • Example 5 Comparative Example 7 Comparative Example 8 Microspheres (g in sec) 29.

Landscapes

  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Wrappers (AREA)

Abstract

The wrapping paper has a right surface with a skin feel, which can be printed at high speeds. It has a support paper material with a surface covering of at least expanded thermoplastic micro-spheres and a bonding agent forming the right paper surface. The paper has a static friction coefficient between the right and left surfaces of ≤ 0.95 and pref. ≤ 0.90. The paper weight is 70-500 g/m<2> and pref. 200-400 g/m<2>. The support paper is transparent or translucent, and especially a tracing paper, pref. from pressure refining of cellulose fibers. The covering layer on the right surface has a weight of 6-20 g/m<2> and pref. 8-17 g/m<2>. The covering layer is composed of 5-12 dry wt% of expanded thermoplastic micro-spheres and pref. 6-9 wt%, 15-95 dry wt% of a bonding agent with a glazing temp. of (-) 10 degrees C to (+) 35 degrees and pref. 20-40 wt%, 0-75 dry wt% of mineral pigments and pref. 40-75 wt% and 0-40 dry wt% of dyestuff, to give a total of 100 wt%. The expanded thermoplastic micro-spheres contain a gas, which expands at a temp. of 90-115 degrees C and pref. 100-110 degrees C. The surface covering has a low friction component in a distribution of 0.1-5.0 g/m<2> and pref. 0.3-3.0 g/m<2>. At least one surface contains a salt which can be ionized, and particularly sodium chloride. The support paper has a coloring at least under the layer of micro-spheres and/or a layer and/or a print which can be seen through the layer. An Independent claim is included for a paper prodn. process where the support paper is formed from a cellulose fiber suspension in water together with synthetic fibers if required. It is mixed with minerals, at least one bonding agent and a dye, an agent to resist moisture and other conventional papermaking additives. The left surface of the paper is coated with a material to reduce friction, and the paper is dried at 100 degrees C. The right surface of the paper is coated with a mixture of thermoplastic micro-spheres together with a bonding agent and mineral pigments and dyestuff. The coated paper is heated at 90-115 degrees C to dry the paper and expand the micro-spheres and pref. 100-110 degrees C. The paper is wound into a roll. Preferred Features: The low friction coating is applied by a glue press using a double-sided transfer film and the drying is through an air cushion. The cellulose fibers are refined to a high state and pref. ≥ 90 degrees SR. A further Independent claim is included for a wrapping process where the paper is drawn off the roll and cut into sheets in the required format. The sheets are printed at a speed of ≥ 8000 sheets/hr., and the printed sheets are cut to size. An adhesive is applied to either surface where the wrapping is to be secured. The products are wrapped, with the layer containing the expanded thermoplastic micro-spheres on the outer side.

Description

La présente invention concerne une feuille ayant un toucher rappelant la peau et imprimable à des cadences élevées. Elle concerne en particulier une feuille d'emballage comportant une caractéristique en liaison avec le produit à emballer, et plus particulièrement destinée à l'emballage de luxe pour les produits cosmétiques. Elle concerne aussi le procédé de fabrication de la feuille et de l'emballage ainsi que l'emballage lui-même.The present invention relates to a sheet having a feel reminiscent of the skin and printable at high rates. It relates in particular to a packaging sheet having a characteristic in connection with the product to be packaged, and more particularly for luxury packaging for cosmetics. It also relates to the method of manufacturing the sheet and the packaging and the package itself.

Les emballages, en particulier de luxe pour les produits cosmétiques, sont réalisés à partir de feuilles en papier ou carton pouvant être colorées, embossées ou grainées, et portant des impressions avec des motifs, la marque du produit et le nom du laboratoire ou parfumeur le fabriquant. Ces emballages se distinguent principalement par l'effet visuel qui résultent des impressions et le cas échéant du grain de la feuille.Packaging, especially luxury for cosmetics, is made from sheets of paper or cardboard that can be colored, embossed or grained, and bearing prints with patterns, the brand of the product and the name of the laboratory or perfumer. manufacturer. These packages are distinguished mainly by the visual effect resulting from the prints and if necessary the grain of the sheet.

La Demanderesse s'est intéressée en particulier à fournir une feuille d'emballage qui comporterait une caractéristique qui rappellerait l'une des caractéristiques essentielles du produit à emballer, en particulier pour les produits cosmétiques à appliquer sur la peau.The Applicant was particularly interested in providing a packaging sheet which would include a characteristic that would recall one of the essential characteristics of the product to be packaged, in particular for cosmetic products to be applied to the skin.

La Demanderesse propose alors de fournir une caractéristique qui évoque la destination, à savoir la peau, c'est à dire le toucher, la douceur de la peau.The Applicant then proposes to provide a characteristic that evokes the destination, namely the skin, ie the touch, the softness of the skin.

Pour donner un toucher plus doux à une feuille il est connu d'y appliquer par un traitement de surface, en particulier par imprégnation, une composition d'un polymère en dispersion aqueuse (latex). Cependant le toucher est encore trop éloigné d'un toucher "peau".To give a softer touch to a sheet it is known to apply a surface treatment, in particular by impregnation, a composition of a polymer in aqueous dispersion (latex). However the touch is still too far from a touch "skin".

La Demanderesse a trouvé qu'un toucher "peau" pouvait être obtenu en appliquant à la surface de la feuille une couche qui comporte des microsphères thermoplastiques expansibles.The Applicant has found that a "skin" feel can be obtained by applying to the sheet surface a layer which comprises expandable thermoplastic microspheres.

Il est connu d'utiliser ce type de microsphères expansibles soit en masse pour augmenter le volume massique d'un papier soit en surface d'une feuille de papier pour y conférer des propriétés antiglisse comme décrit dans les demandes de brevet EP 549 948 , FR 2395141 , FR 2635506 , JP 63146945 ou le brevet US 4753831 .It is known to use this type of expandable microspheres either in bulk to increase the mass volume of a paper or on the surface of a sheet of paper to impart anti-slip properties as described in the patent applications. EP 549 948 , FR 2395141 , FR 2635506 , JP 63146945 or the patent US 4753831 .

Néanmoins, dans le cas de l'application de ces microsphères en surface, se posent des problèmes de machinabilité de ces feuilles car elles ne sont ni enroulables ni manipulables comme des feuilles classiques. En effet leurs propriétés antiglisse vont engendrer une certaine friction lorsque la "face peau" est soumise à un frottement et par conséquent va gêner le bon enroulement et déroulement des feuilles en bobine et, dans le cas de feuilles découpées en formats, va empêcher la bonne séparation des feuilles les unes des autres dans la pile à traiter. Pour éviter le plus possible cet handicap, il faut que l'étape d'expansion des microsphères soit réalisée le plus tard possible dans la chaine de transformation, après l'impression ou lors du façonnage des articles.Nevertheless, in the case of the application of these microspheres on the surface, there are problems of machinability of these sheets because they are neither rollable nor manipulable like conventional sheets. Indeed, their anti-slip properties go generate a certain friction when the "skin face" is subjected to friction and therefore will hinder the good winding and unwinding of the sheets in coil and, in the case of sheets cut in formats, will prevent the good separation of the leaves any of the others in the stack to be treated. To avoid this handicap as much as possible, the microsphere expansion step must be carried out as late as possible in the processing chain, after the printing or during the shaping of the articles.

Il n'est donc pas évident de proposer la solution énoncée ci-dessus dans la mesure où l'effet "peau" va s'opposer à la bonne machinabilité des feuilles sur les machines d'impression ou de transformation.It is therefore not obvious to propose the solution stated above insofar as the effect "skin" will oppose the good machinability of the sheets on printing machines or processing.

Or il est important de pouvoir imprimer et transformer ces feuilles aux cadences habituelles de façon à ne pas rajouter de surcoût; par exemple les cadences sont de l'ordre de 8000 voire jusqu'à 15000 feuilles à l'heure sur les machines d'impression en offset.Now it is important to be able to print and transform these sheets at the usual rates so as not to add extra cost; for example, the rates are of the order of 8000 or even up to 15000 sheets per hour on offset printing machines.

De surcroît, il faut que les feuilles sur l'autre face verso soit réceptrice à des colles afin qu'elles soient aptes à être transformées en boîtes par exemple.In addition, it is necessary that the sheets on the other side face is receptive to glues so that they are able to be transformed into boxes for example.

L'invention fournit une feuille présentant sur l'une de ses faces un toucher rappelant la peau, dite face recto, et étant imprimable à des cadences élevées, ladite feuille comprenant une feuille support revêtue sur l'une de ses faces d'une couche comportant au moins des microsphères thermoplastiques expansées et un liant, formant ladite face recto et la face verso comportant une composition de traitement améliorant le coefficient de friction, en quantités comprises entre 0,1 et 5 g/m2, et ladite feuille ayant un coefficient de friction statique entre ladite face recto et l'autre face verso inférieur à 0,95, de préférence inférieur ou égal à 0,90, mesure faite selon la norme NF-Q-03-082 avec un patin de 200g.The invention provides a sheet having on one of its faces a touch reminding the skin, said face-face, and being printable at high rates, said sheet comprising a support sheet coated on one of its faces with a layer comprising at least expanded thermoplastic microspheres and a binder, forming said front face and the back side having a friction coefficient improving treatment composition, in amounts between 0.1 and 5 g / m 2 , and said sheet having a coefficient static friction between said front face and the other reverse side less than 0.95, preferably less than or equal to 0.90, measured according to standard NF-Q-03-082 with a pad of 200g.

Le coefficient de friction statique reflète l'aptitude de la feuille à se bloquer au départ d'un déplacement; plus il est élevé, plus l'amorce du mouvement d'une feuille dans une pile sera difficile.The coefficient of static friction reflects the ability of the sheet to lock at the start of a displacement; the higher it is, the more difficult the movement of a leaf in a pile will begin.

En particulier l'invention se caractérise par le fait que ladite feuille a un grammage compris entre 70 et 500 g/m2, de préférence entre 200 et 400 g/m2.In particular the invention is characterized in that said sheet has a grammage of between 70 and 500 g / m 2 , preferably between 200 and 400 g / m 2 .

Selon un cas particulier, l'invention se caractérise par le fait que ladite feuille support est transparente ou tranlucide. Plus particulièrement ladite feuille support est une feuille de papier calque. On entend par papier calque, un papier tel que défini par la norme internationale ISO 4046-1978 au point 6.94. Plus particulièrement l'invention se caractérise par le fait que ladite feuille support est une feuille de papier calque, en particulier obtenue par un raffinage poussé des fibres de cellulose la composant.According to a particular case, the invention is characterized in that said support sheet is transparent or translucent. More particularly said support sheet is a sheet of tracing paper. Tracing paper means a paper as defined by International Standard ISO 4046-1978 in 6.94. More particularly, the invention is characterized in that said support sheet is a sheet of tracing paper, in particular obtained by a thorough refining of the cellulose fibers component.

En particulier l'invention se caractérise par le fait que le poids de ladite couche de la face recto est compris entre 6 et 20 g/m2 en sec, de préférence entre 8 et 17 g/m2.In particular the invention is characterized in that the weight of said layer of the front face is between 6 and 20 g / m 2 dry, preferably between 8 and 17 g / m 2 .

En particulier l'invention se caractérise par le fait que ladite couche comporte:

  • de 5 à 12 parts en poids sec de microsphères thermoplastiques expansées, de préférence de 6 à 9 parts,
  • de 15 à 95 parts en poids sec d'un liant ayant une température de transition vitreuse comprise entre -10 et 35 °C, de préférence de 20 à 40 parts,
  • de 0 à 75 parts de pigments minéraux en poids sec, de préférence de 40 à 75 parts,
  • de 0 à 20 parts de colorant(s) en poids sec,
    la somme des parts faisant 100.
In particular the invention is characterized in that said layer comprises:
  • from 5 to 12 parts by dry weight of expanded thermoplastic microspheres, preferably from 6 to 9 parts,
  • from 15 to 95 parts by dry weight of a binder having a glass transition temperature of between -10 and 35 ° C, preferably of 20 to 40 parts,
  • from 0 to 75 parts of mineral pigments in dry weight, preferably from 40 to 75 parts,
  • from 0 to 20 parts of dye (s) by dry weight,
    the sum of the shares making 100.

Plus particulièrement, l'invention se caractérise par le fait que lesdites microsphères sont des sphères thermoplastiques expansées comprenant un gaz. En particulier l'enveloppe thermoplastique de ces microsphères est à base d'un copolymère de chlorure de vinylidène et d'acrylonitrile.More particularly, the invention is characterized in that said microspheres are expanded thermoplastic spheres comprising a gas. In particular the thermoplastic envelope of these microspheres is based on a copolymer of vinylidene chloride and acrylonitrile.

De préférence lesdites microsphères sont des sphères thermoplastiques expansées à une température comprise entre 90 et 115 °C, de préférence entre 100 et 110 °C.Preferably said microspheres are expanded thermoplastic spheres at a temperature between 90 and 115 ° C, preferably between 100 and 110 ° C.

L'invention se caractérise par le fait que la face verso comporte une composition de traitement améliorant les coefficients de friction, notamment statique, en quantités comprises entre 0,1 et 5 g/m2, de préférence entre 0,3 et 3 g/m2.The invention is characterized in that the reverse side comprises a treatment composition improving friction coefficients, in particular static, in amounts of between 0.1 and 5 g / m 2 , preferably between 0.3 and 3 g / m 2. m 2 .

En particulier l'invention se caractérise par le fait que la composition de traitement de cette autre face verso comporte un composé choisi parmi les agents de collage, en particulier parmi les dimères d'alkyl cétène, les cires de polyoléfines en particulier de polyéthylène et de préférence en mélange avec un liant utilisé en papeterie notamment un amidon ou un poly(vinyle d'alcool) et éventuellement un agent de rhéologie. Un tel agent de rhéologie peut être par exemple de la carboxyméthylcellulose.In particular, the invention is characterized in that the treatment composition of this other reverse side comprises a compound chosen from gluing agents, in particular from alkyl ketene dimers, polyolefin waxes, in particular polyethylene waxes and preferably in admixture with a binder used in the paper industry, in particular a starch or polyvinyl alcohol and possibly a rheology agent. Such a rheology agent may for example be carboxymethylcellulose.

Selon un cas particulier, l'invention se caractérise par le fait qu'au moins l'une des faces comporte un sel ionisable, en particulier du chlorure de sodium. Il permet d'améliorer la dissipation des charges électrostatiques. Ce sel peut être ajouté en solution aqueuse en mélange éventuellement avec un liant utilisé en papeterie, en particulier un amidon ou un poly(vinyle d'alcool) et/ou un colorant grâce notamment à l'aide d'une imprégnatrice. Le colorant peut permettre de parfaire la coloration du support. Le sel ionisable peut aussi être ajouté en même temps que la composition précédente appliquée à la face verso.According to one particular case, the invention is characterized in that at least one of the faces comprises an ionizable salt, in particular sodium chloride. It improves the dissipation of electrostatic charges. This salt may be added in aqueous solution optionally mixed with a binder used in paper industry, in particular an alcohol starch or poly (vinyl) and / or a dye, in particular by means of an impregnator. The dye may make it possible to perfect the coloration of the support. The ionizable salt may also be added at the same time as the previous composition applied to the reverse side.

Selon un autre cas particulier, l'invention se caractérise par le fait que la feuille support, au moins sous la couche de microsphères, présente une couleur et/ou une couche et/ou impression(s) visible(s) à travers ladite couche.According to another particular case, the invention is characterized in that the support sheet, at least under the layer of microspheres, has a color and / or a layer and / or print (s) visible (s) through said layer .

L'application de la couche de microsphères peut se faire par un moyen de couchage connu en papeterie et plus particulièrement par une coucheuse à lame d'air ou encore par une presse encolleuse à transfert de film en particulier double face qui permette de traiter deux faces simultanément notamment comme la presse dite "TWIN HSM" de la société BTG.The application of the layer of microspheres can be done by a coating means known in the paper industry and more particularly by an air knife coater or by a film transfer gluing machine in particular double-sided which allows to treat two faces at the same time as the "TWIN HSM" press of BTG.

L'invention concerne aussi le procédé d'obtention de la feuille.The invention also relates to the process for obtaining the sheet.

Selon un cas particulier, le procédé de fabrication de ladite feuille par voie papetière se caractérise en ce qu'il comporte les étapes suivantes :

  • a) on forme une feuille support à partir d'une suspension en milieu aqueux de fibres de cellulose et éventuellement de fibres synthétiques, de charges minérales, d'au moins un liant, et, éventuellement encore, d'un colorant, d'un agent de résistance humide et d'autres additifs usuellement utilisés en papeterie,
  • b) on traite l'une des faces, dite face verso, de la feuille par une composition améliorant les coefficients de friction, notamment statique,
  • c) on sèche éventuellement la feuille obtenue vers 100 °C,
  • d) on traite l'autre des faces, dite face recto, de la feuille obtenue par une composition en milieu aqueux comprenant :
    • de 5 à 12 parts en poids sec de microsphères thermoplastiques expansibles, de préférence de 6 à 9 parts,
    • de 15 à 95 parts en poids sec d'un liant ayant une température de transition vitreuse comprise entre -10 et 35 °C, de préférence de 20 à 40 parts,
    • de 0 à 75 parts de pigments minéraux en poids sec, de préférence de 40 à 75 parts,
    • de 0 à 20 parts de colorant(s) en poids sec,
      la somme des parts faisant 100,
  • e) on soumet la feuille à une température comprise entre 90 et 115 °C, de préférence entre 100 et 110°C pour à la fois sécher la feuille et expanser les microsphères,
  • f) on bobine la feuille.
According to a particular case, the method of manufacturing said sheet by paper means is characterized in that it comprises the following steps:
  • a) a carrier sheet is formed from an aqueous suspension of cellulose fibers and optionally of synthetic fibers, mineral fillers, at least one binder, and, optionally, a dye, a wet strength agent and other additives commonly used in paper industry,
  • b) treating one of the faces, referred to as the reverse face, of the sheet by a composition improving the coefficients of friction, in particular static,
  • c) the resulting sheet is optionally dried at about 100.degree.
  • d) treating the other side, said face-face, of the sheet obtained with a composition in an aqueous medium comprising:
    • from 5 to 12 parts by dry weight of expandable thermoplastic microspheres, preferably from 6 to 9 parts,
    • from 15 to 95 parts by dry weight of a binder having a glass transition temperature of between -10 and 35 ° C, preferably of 20 to 40 parts,
    • from 0 to 75 parts of mineral pigments in dry weight, preferably from 40 to 75 parts,
    • from 0 to 20 parts of dye (s) by dry weight,
      the sum of the shares making 100,
  • e) the sheet is subjected to a temperature between 90 and 115 ° C, preferably between 100 and 110 ° C to both dry the sheet and expand the microspheres,
  • f) the sheet is reeled.

Selon un cas particulier du procédé, l'étape b) est réalisée sur une presse encolleuse et l'étape c) sur une coucheuse à lame d'air.According to a particular case of the process, step b) is carried out on a gluing press and step c) on an air knife coater.

Selon un autre cas particulier, le procédé de fabrication de ladite feuille par voie papetière se caractérise en ce qu'il comporte les étapes suivantes :

  • a) on forme une feuille support à partir d'une suspension en milieu aqueux de fibres de cellulose et éventuellement de fibres synthétiques, de charges minérales, d'au moins un liant et, éventuellement encore, d'un colorant, d'un agent de résistance humide et d'autres additifs usuellement utilisés en papeterie,
  • b) on traite l'une des faces, dite face verso, de la feuille par une composition améliorant les coefficients de friction, notamment statique, et simultanément on traite l'autre face, dite face recto, de la feuille obtenue par une composition en milieu aqueux comprenant :
    • de 5 à 12 parts en poids sec de microsphères thermoplastiques expansibles, de préférence de 6 à 9 parts,
    • de 15 à 95 parts en poids sec d'un liant ayant une température de transition vitreuse comprise entre -10 et 35 °C, de préférence de 20 à 40 parts,
    • de 0 à 75 parts de pigments minéraux en poids sec, de préférence de 40 à 75 parts,
    • de 0 à 20 parts de colorant(s) en poids sec,
      la somme des parts faisant 100,
  • c) on soumet la feuille obtenue à une température comprise entre 90 et 115 °C, de préférence entre 100 et 110 °C pour à la fois sécher la feuille et expanser les microsphères,
  • d) on bobine la feuille.
According to another particular case, the method of manufacturing said sheet by paper means is characterized in that it comprises the following steps:
  • a) a carrier sheet is formed from an aqueous medium suspension of cellulose fibers and optionally synthetic fibers, mineral fillers, at least one binder and, optionally, a dye, an agent wet strength and other additives commonly used in paper industry,
  • b) treating one of the faces, referred to as the reverse side, of the sheet by a composition improving the coefficients of friction, in particular static, and at the same time treating the other face, said face-face, of the sheet obtained by a composition of aqueous medium comprising:
    • from 5 to 12 parts by dry weight of expandable thermoplastic microspheres, preferably from 6 to 9 parts,
    • from 15 to 95 parts by dry weight of a binder having a glass transition temperature of between -10 and 35 ° C, preferably of 20 to 40 parts,
    • from 0 to 75 parts of mineral pigments in dry weight, preferably from 40 to 75 parts,
    • from 0 to 20 parts of dye (s) by dry weight,
      the sum of the shares making 100,
  • c) the sheet obtained is subjected to a temperature between 90 and 115 ° C, preferably between 100 and 110 ° C to both dry the sheet and expand the microspheres,
  • d) the sheet is reeled.

Selon un cas particulier de ce dernier procédé, l'étape b) est réalisée sur une presse encolleuse à transfert de film double face.According to a particular case of the latter method, step b) is performed on a double-sided film transfer sizing machine.

Selon un cas particulier de ces procédés, à l'étape a), les fibres de cellulose sont raffinées à un degré élevé de raffinage, de préférence supérieur ou égal à 90 °SR.According to a particular case of these processes, in step a), the cellulose fibers are refined to a high degree of refining, preferably greater than or equal to 90 ° SR.

L'invention concerne aussi l'utilisation d'une feuille telle que décrite précédemment pour fabriquer un emballage de produits cosmétiques pour la peau présentant une caractéristique essentielle rappelant la destination du produit à emballer par un toucher peau, la face comportant lesdites microsphères expansées formant la face externe dudit emballage.The invention also relates to the use of a sheet as described above to manufacture a skin cosmetic packaging having an essential characteristic recalling the destination of the product to be wrapped by a skin-touch, the face comprising said expanded microspheres forming the outer face of said package.

L'invention concerne aussi un emballage pour produits cosmétiques pour la peau présentant une caractéristique essentielle rappelant la destination du produit à emballer par un toucher peau obtenue à partir d'une feuille telle que décrite précédemment.The invention also relates to a packaging for cosmetic products for the skin having an essential characteristic reminding the destination of the product to be packaged by a skin feel obtained from a sheet as described above.

L'invention concerne aussi un procédé de fabrication d'un emballage qui se caractérise en ce que :

  • on prend une feuille en bobine comme décrite précédemment ou on fabrique une feuille selon l'un des procédés décrits précédemment,
  • on découpe la feuille en bobine en feuilles de formats donnés,
  • on imprime la face recto desdites feuilles en format à une cadence d'au moins 8 000 feuilles à l'heure,
  • on découpe lesdites feuilles en format selon le modèle d'emballage voulu,
  • on applique de la colle sur la face dite verso et/ou sur la face recto, au moins sur les zones d'assemblage,
  • on colle les zones d'assemblage et confectionne l'emballage selon le modèle souhaité, la face comportant lesdites microsphères expansées formant la face externe dudit emballage.
The invention also relates to a method of manufacturing a packaging which is characterized in that
  • a reel sheet is used as described above or a sheet is produced according to one of the methods described above,
  • the sheet is cut into a reel into sheets of given formats,
  • the face of said sheets is printed in format at a rate of at least 8,000 sheets per hour,
  • said sheets are cut into the format according to the desired packaging model,
  • glue is applied to the so-called back side and / or to the front face, at least on the assembly areas,
  • the assembly zones are glued and the packaging is made according to the desired model, the face comprising said expanded microspheres forming the outer face of said package.

La face recto des feuilles à imprimer peut l'être par différents moyens d'impression connus, notamment par impression offset, par sérigraphie et est apte à recevoir de la dorure à chaud.The front face of the sheets to be printed can be by various known printing means, in particular by offset printing, by screen printing and is able to receive gilding hot.

Des exemples comparatifs et des exemples non limitatifs de réalisation de l'invention, et d'autres avantages éventuellement, sont décrits ci-après.Comparative examples and nonlimiting examples of embodiment of the invention, and other possible advantages, are described below.

EXEMPLES :EXAMPLES Exemples 1 à 3 :Examples 1 to 3:

Sur une feuille de papier support ayant un grammage de 290 g/m2 on applique, à l'aide d'une presse encolleuse de laboratoire, une composition d'un dimère d'alkylcétène en milieu aqueux dit AKD, à raison de 3 g/m2 en poids sec, on sèche la feuille. A l'aide d'une barre de MEYER on applique une composition comprenant des microsphères expansibles à différents poids de couche comme mentionné dans le tableau 1. La feuille ainsi traitée est séchée vers 100 °C afin de sécher la feuille et d'expanser les microsphères.On a sheet of paper having a basis weight of 290 g / m 2 is applied, using a laboratory gluing press, a composition of an alkyl ketene dimer in aqueous medium said AKD, at 3 g / m 2 in dry weight, the sheet is dried. Using a MEYER bar is applied a composition comprising expandable microspheres with different weight of layer as mentioned in Table 1. The sheet thus treated is dried at 100 ° C to dry the sheet and expand the microspheres.

La composition comprenant des microsphères est réalisée en milieu aqueux et contient en poids sec :

  • 398,6 g en sec de carbonate de calcium broyé ayant une taille moyenne de 2 µm,
  • 159,6 g en sec d'un copolymère styrène-butadiène carboxylé en dispersion aqueuse stabilisée, ayant une température de transition vitreuse de + 4°C, un pH d'environ 5,5 - 6, comme liant,
  • 42,56 g en sec de microsphères thermoplastiques expansibles, d'un diamètre de 10-16 µm, ayant une enveloppe thermoplastique faite d'un copolymère de chlorure de vinylidène et d'acrylonitrile et contenant de l'isobutane comme gaz d'expansion, commercialisées sous la marque EXPANCEL 820 ® par la société EXPANCEL.
The composition comprising microspheres is carried out in an aqueous medium and contains, in dry weight:
  • 398.6 g of dry ground calcium carbonate having an average size of 2 μm,
  • 159.6 g dry of a carboxylated styrene-butadiene copolymer in stabilized aqueous dispersion, having a glass transition temperature of + 4 ° C., a pH of about 5.5 - 6, as binder,
  • 42.56 g dry expandable thermoplastic microspheres, 10-16 μm in diameter, having a thermoplastic shell made of a copolymer of vinylidene chloride and acrylonitrile and containing isobutane as an expansion gas, sold under the trademark Expancel 820® by Expancel.

On ajoute éventuellement un agent régulateur de rhéologie.A rheology regulating agent is optionally added.

Exemples 4 à 6 :Examples 4 to 6:

On réalise des feuilles comme aux exemples 1 à 3 mais on fait varier le taux de microsphères dans la couche pour un poids de couche donné de 10 g/m2 comme indiqué dans le Tableau 2.Sheets are made as in Examples 1 to 3, but the level of microspheres in the layer is varied for a given layer weight of 10 g / m 2 as shown in Table 2.

Exemples 7 à 8 :Examples 7 to 8:

On réalise des feuilles comme aux exemples 1 à 3 mais pour un taux de microsphères dans la couche et pour un poids de couche donnés, on fait varier la température d'expansion des microsphères comme indiqué dans le Tableau 2.Sheets are made as in Examples 1 to 3 but for a given microsphere level in the layer and for a given layer weight, the expansion temperature of the microspheres is varied as shown in Table 2.

Exemple 9:Example 9

Sur une machine à papier à table plate, on forme une feuille de papier de couleur noire et ayant un grammage de 290 g/m2 sur laquelle on applique à l'aide d'une presse encolleuse, une composition en milieu aqueux contenant un amidon et un dimère d'alkylcétène (dit AKD) à raison de 0,8 g/m2 en poids sec, on sèche la feuille puis on l'imprègne d'une composition aqueuse d'un mélange d'amidon et de chlorure de sodium (0,1 part en poids pour 100 parts de composition aqueuse ). Sur une coucheuse à lame d'air, on applique, à raison de 12 g/m2 en sec, une composition comprenant des microsphères comme décrit ci-après. La feuille ainsi traitée est séchée vers 100-110 °C afin de sécher la feuille et d'expanser les microsphères. La feuille est bobinée au fur et à mesure de la production.On a flat-table paper machine, a sheet of black paper having a basis weight of 290 g / m 2 is formed on which a composition in an aqueous medium containing a starch is applied by means of a sizing press. and an alkylketene dimer (AKD) at a rate of 0.8 g / m 2 by dry weight, the sheet is dried and then impregnated with an aqueous composition of a mixture of starch and sodium chloride (0.1 parts by weight per 100 parts of aqueous composition). On an air knife coater, 12 g / m 2 dry was applied to a composition comprising microspheres as described below. The thus treated sheet is dried at about 100-110 ° C to dry the sheet and expand the microspheres. The sheet is wound as production progresses.

La composition comprenant des microsphères est réalisée en milieu aqueux et contient en poids sec :

  • 86,6 g de colorant noir,
  • 159,6 g en sec d'un copolymère styrène-butadiène carboxylé en dispersion aqueuse stabilisée ayant une température de transition vitreuse de + 4°C, un pH d'environ 5,5,
  • 42,56 g en sec des microsphères expansibles de la marque EXPANCEL 820 ®.
The composition comprising microspheres is carried out in an aqueous medium and contains, in dry weight:
  • 86.6 g of black dye,
  • 159.6 g dry of a carboxylated styrene-butadiene copolymer in a stabilized aqueous dispersion having a glass transition temperature of + 4 ° C., a pH of approximately 5.5,
  • 42.56 g dry expandable microspheres EXPANCEL 820 ® brand.

On ajoute éventuellement un agent régulateur de rhéologie.A rheology regulating agent is optionally added.

La feuille en bobine est découpée en feuilles d'un certain format et mise en pile. Ensuite les feuilles en formats sont imprimées feuille à feuille à raison de 10 000 feuilles à l'heure sur une machine d'impression par offset, donc sans affecter la cadence habituelle d'impression.The reel sheet is cut into sheets of a certain size and stacked. Then the sheets in formats are printed sheet by sheet of 10,000 sheets per hour on an offset printing machine, so without affecting the usual rate of printing.

La feuille imprimée peut être transformée par découpe et collage en une boîte d'emballage pour un pot de crème destinée à la peau par exemple, la face externe de l'emballage étant la face comportant la couche avec les microsphères.The printed sheet may be processed by cutting and gluing into a packaging box for a cream pot for the skin for example, the outer face of the package being the side having the layer with the microspheres.

Exemple 10 :Example 10

Sur une machine à papier à table plate, on forme une feuille de papier ayant un grammage de 320 g/m2, puis en ligne, à l'aide d'une presse encolleuse à transfert de film double face, dite TWIN HSM de la société BTG, on traite l'une des faces, à raison de 3 g/m2 en poids sec, par une composition aqueuse d'un mélange comprenant un amidon et un dimère d'alkylcétène (dit AKD) et on traite simultanément l'autre face, à raison de 15 g/m2 en sec, par une composition comprenant des microsphères comme décrit ci-après. La feuille ainsi traitée est séchée à 100-110°C afin de sécher la feuille et d'expanser les microsphères. La feuille est bobinée au fur et à mesure de la production.On a flat-table paper machine, a sheet of paper having a basis weight of 320 g / m 2 is formed , then in line, using a double-sided film transfer sizing machine, called TWIN HSM of the BTG company, one of the faces, at a rate of 3 g / m 2 in dry weight, is treated with an aqueous composition of a mixture comprising a starch and an alkyl ketene dimer (AKD) and the mixture is treated simultaneously. another side, at 15 g / m 2 dry, with a composition comprising microspheres as described below. The thus treated sheet is dried at 100-110 ° C to dry the sheet and expand the microspheres. The sheet is wound as production progresses.

La composition comprenant des microsphères est réalisée en milieu aqueux et contient en poids sec :

  • 398,6 g de carbonate de calcium,
  • 159,6 g du copolymère styrène-butadiène carboxylé utilisé précédemment,
  • 42,56 g des microsphères expansibles de la marque EXPANCEL 820 ®.
The composition comprising microspheres is carried out in an aqueous medium and contains, in dry weight:
  • 398.6 g of calcium carbonate,
  • 159.6 g of the carboxylated styrene-butadiene copolymer used previously,
  • 42.56 g expandable microspheres EXPANCEL 820 ® brand.

On ajoute éventuellement un agent régulateur de rhéologie.A rheology regulating agent is optionally added.

La composition aqueuse comprenant le mélange d'amidon et d'un dimère d'alkylcétène contient :

  • 6 parts en poids d'amidon sec,
  • 0,4 parts en poids d'un dimère d'alkylcétène sec,
  • le complément en eau pour faire 100 parts en poids.
The aqueous composition comprising the mixture of starch and an alkyl ketene dimer contains:
  • 6 parts by weight of dry starch,
  • 0.4 parts by weight of a dry alkylketene dimer,
  • the addition of water to make 100 parts by weight.

Ensuite les feuilles en formats sont imprimées feuille à feuille à raison de 10 000 feuilles à l'heure sur une machine d'impression par offset sans affecter la cadence habituelle d'impression.Then the sheets in formats are printed sheet by sheet of 10,000 sheets per hour on an offset printing machine without affecting the usual printing rate.

La feuille imprimée peut être transformée par découpe et collage en une boîte d'emballage pour un pot de crème destinée à la peau par exemple, la face externe de l'emballage étant la face comportant la couche avec les microsphères.The printed sheet may be processed by cutting and gluing into a packaging box for a cream pot for the skin for example, the outer face of the package being the side having the layer with the microspheres.

Exemple 11 :Example 11

Sur une feuille de papier calque obtenu par raffinage poussé de fibres de cellulose (à un degré de raffinage d'au moins 90 degrés SR) ayant un grammage de 140 g/m2 on applique, à l'aide d'une presse encolleuse de laboratoire, une composition d'un dimère d'alkylcétène en milieu aqueux dit AKD en mélange avec un liant amidon et éventuellement un agent régulateur de rhéologie, à raison de 3,5 g/m2 en poids sec, on sèche la feuille. A l'aide d'une barre de MEYER on applique une composition comprenant des microsphères expansibles et un liant acrylique et éventuellement un agent régulateur de rhéologie à raison de 10 g/m2. Cette composition ne comporte pas de charges minérales. La feuille ainsi traitée est séchée vers 135 °C afin de sécher la feuille et d'expanser les microsphères. La feuille ne présente pas de curl important et a conservé une certaine transparence.On a sheet of tracing paper obtained by fine refining of cellulose fibers (at a degree of refinement of at least 90 degrees SR) having a basis weight of 140 g / m 2 is applied to using a laboratory gluing press, a composition of an alkyl ketene dimer in an aqueous medium called AKD mixed with a starch binder and optionally a rheology regulating agent, at a rate of 3.5 g / m 2 in dry weight, the sheet is dried. Using a MEYER bar is applied a composition comprising expandable microspheres and an acrylic binder and optionally a rheology regulator at a rate of 10 g / m 2 . This composition does not include mineral fillers. The thus treated sheet is dried at about 135 ° C to dry the sheet and expand the microspheres. The leaf has no significant curl and has retained some transparency.

La feuille en bobine est découpée en feuilles d'un certain format et mise en pile. Ensuite les feuilles en formats sont imprimées feuille à feuille à raison de 10 000 feuilles à l'heure sur une machine d'impression par offset sans affecter la cadence habituelle d'impression.The reel sheet is cut into sheets of a certain size and stacked. Then the sheets in formats are printed sheet by sheet of 10,000 sheets per hour on an offset printing machine without affecting the usual printing rate.

La feuille imprimée peut être transformée par découpe et collage en un emballage pour un pot de crème destinée à la peau par exemple, la face externe de l'emballage étant la face comportant la couche avec les microsphères.The printed sheet may be converted by cutting and gluing into a package for a cream pot for the skin for example, the outer face of the package being the side having the layer with the microspheres.

REALISATION DES TESTS :REALIZATION OF THE TESTS:

  • On mesure la rugosité Bendtsen de la face comportant la couche de microsphères selon la norme française NF-Q-03-049.The Bendtsen roughness of the face comprising the layer of microspheres is measured according to the French standard NF-Q-03-049.
  • On mesure la compressiblité et la reprise élastique de la face comportant la couche de microsphères selon la norme américaine ASTM-D-1147.The compressibility and the elastic recovery of the face comprising the layer of microspheres are measured according to the American standard ASTM-D-1147.
  • On apprécie le toucher de la face comportant la couche de microsphères manuellement.The touch of the face having the layer of microspheres is appreciated manually.
  • On détermine les coefficients de friction face recto enduite de microsphères contre face verso, selon la norme française NF-Q-03-082, de la façon suivante :
    • On colle la face recto enduite de la couche avec des microsphères d'une feuille à tester sous un patin à l'aide d'un ruban adhésif double face, le patin fait 6,35 cm de côté et a un poids de 200 g. On place l'ensemble, patin et feuille avec la face verso sans microsphères externe sur la face recto avec des microsphères d'une autre feuille de même nature que celle à tester, l'autre face verso de cette dernière étant collée sur un plan fixe. Le patin, relié à un dynamomètre, est tiré à une vitesse de 200 mm/mn, de façon à faire glisser la face verso sans microsphères sur la face recto avec microsphères. Grâce au dynanomètre, on mesure les forces statique (au départ du déplacement) et dynamique (entretien du déplacement) pour calculer respectivement les coefficients statique et dynamique selon l'équation suivante :
      Figure imgb0001
    The face-face friction coefficients coated with microspheres against the back side, according to the French standard NF-Q-03-082, are determined as follows:
    • The coated front side of the layer is glued with microspheres of a test sheet under a pad with double-sided tape, the pad is 6.35 cm square and weighs 200 g. The set, pad and foil, with the back side without outer microspheres on the front face, are placed with microspheres of another sheet of the same nature as the one to be tested, the other back side of the latter being glued on a fixed plane. . The pad, connected to a dynamometer, is pulled at a speed of 200 mm / min, so as to slide the reverse side without microspheres on the front face with microspheres. Thanks to the dynamometer, we measure static forces (at the start of displacement) and dynamic forces (displacement maintenance) to calculate respectively the static and dynamic coefficients according to the following equation:
      Figure imgb0001
Résultats :Results:

Les résultats des tests pour les exemples 1 à 8 et le papier support sont présentés dans les Tableaux 1 et 2.The test results for Examples 1-8 and the carrier paper are shown in Tables 1 and 2.

Les exemples 1, 4 et 8 ne présentent pas le toucher "peau" recherché. L'exemple 7, expansé à 120 °C, a un coefficient de friction statique trop élevé.Examples 1, 4 and 8 do not have the desired "skin" feel. Example 7, foamed at 120 ° C., has a coefficient of static friction that is too high.

Les exemples 2 et 3 ainsi que 5 et 6 présentent le toucher "peau" recherché et ont un coefficient de friction statique inférieur à 0,95. TABLEAU 1 REFERENCES SUPPORT Exemple 1 comparatif Exemple 2 Exemple 3 Microsphères (% poids sec) 0 7 7 7 Température de séchage (°C) - 100 100 100 Poids de couche (g/m2) - 5,3 10,5 15,4 Toucher "peau" - NON OK OK Rugosité Bendtsen (ml/mn) - 471 436 433 Compressibilité Zwick (%) 14,10 14,4 14,35 15,8 Reprise élastique (%) 81,3 76,8 77,0 65,5 Coefficient de friction statique sans traitement de la face verso - 0,82 0,95 0,87 Coefficient de friction statique - 0,72 0,90 0,57 Coefficient de friction dynamique sans traitement de la face verso - 0,66 0,95 0,87 Coefficient de friction dynamique - 0,43 0,90 0,60 TABLEAU 2 REFERENCES Exemple 4 comparatif Exemple 5 Exemple 6 Exemple 7 comparatif Exemple 8 comparatif Microsphères (g en sec) 29,6 60,5 99,2 42,56 42,56 Pigments minéraux (g en sec) 398,6 398,6 398,6 398,6 398,6 Liant (g en sec) 159,6 159,6 159,6 159,6 159,6 Microsphères (% en poids sec) 5 9,8 15 7 7 Température de séchage (°C) 100 100 100 120 80 Poids de couche (g/m2) 9,9 9,6 10,4 10,1 10,4 Toucher "peau" NON - Peu doux OK OK OK NON Rugosité Bendtsen 404 324 353 222 462 Compressibilité Zwick (%) 15,67 14,75 15,47 15,17 14,5 Reprise élastique (%) 72,6 75,4 70,6 63,8 75,5 Coefficient de friction statique sans traitement de la face verso 0,92 1,09 1,16 1,34 0,66 Coefficient de friction statique 0,74 0,84 0,87 1,12 0,56 Coefficient de friction dynamique sans traitement de la face verso 0,92 1,09 1,16 1,34 0,52 Coefficient de friction dynamique 0,74 0,82 0,87 1,12 0,43 Examples 2 and 3 as well as 5 and 6 have the desired "skin" feel and have a static coefficient of friction of less than 0.95. <u> TABLE 1 </ u> REFERENCES SUPPORT Comparative Example 1 Example 2 Example 3 Microspheres (% dry weight) 0 7 7 7 Drying temperature (° C) - 100 100 100 Weight of layer (g / m 2 ) - 5.3 10.5 15.4 Touch "skin" - NO okay okay Bendtsen roughness (ml / min) - 471 436 433 Zwick Compressibility (%) 14.10 14.4 14.35 15.8 Elastic recovery (%) 81.3 76.8 77.0 65.5 Static friction coefficient without backside treatment - 0.82 0.95 0.87 Static friction coefficient - 0.72 0.90 0.57 Dynamic friction coefficient without backside treatment - 0.66 0.95 0.87 Dynamic friction coefficient - 0.43 0.90 0.60 REFERENCES Comparative Example 4 Example 5 Example 6 Comparative Example 7 Comparative Example 8 Microspheres (g in sec) 29.6 60.5 99.2 42.56 42.56 Mineral pigments (g dry) 398.6 398.6 398.6 398.6 398.6 Binder (g dry) 159.6 159.6 159.6 159.6 159.6 Microspheres (% by dry weight) 5 9.8 15 7 7 Drying temperature (° C) 100 100 100 120 80 Weight of layer (g / m 2 ) 9.9 9.6 10.4 10.1 10.4 Touch "skin" NO - Not very soft okay okay okay NO Roughness Bendtsen 404 324 353 222 462 Zwick Compressibility (%) 15.67 14.75 15.47 15.17 14.5 Elastic recovery (%) 72.6 75.4 70.6 63.8 75.5 Static friction coefficient without backside treatment 0.92 1.09 1.16 1.34 0.66 Static friction coefficient 0.74 0.84 0.87 1.12 0.56 Dynamic friction coefficient without backside treatment 0.92 1.09 1.16 1.34 0.52 Dynamic friction coefficient 0.74 0.82 0.87 1.12 0.43

Claims (19)

  1. A sheet having a feel reminiscent of skin on one of its faces, termed the recto face, and capable of being printed at high speeds, comprising a support sheet coated on one of its faces with a layer comprising at least expanded thermoplastic microspheres and a binder, forming said recto face, and the verso face comprising a treatment composition for improving the coefficient of friction, in quantities in the range 0.1 g/m2 to 5 g/m2, preferably in the range 0.3 g/m2 to 3 g/m2, such that said sheet has a static coefficient of friction between said recto face and the other, verso, face of less than 0.95, preferably 0.90 or less, measured in accordance with French standard NF-Q-03-082 using a 200 g block.
  2. A sheet according to the preceding claim, characterized in that said sheet has a grammage in the range 70 g/m2 to 500 g/m2, preferably in the range 200 g/m2 to 400 g/m2.
  3. A sheet according to one of the preceding claims, characterized in that said support sheet is transparent or translucent.
  4. A sheet according to the preceding claim, characterized in that said support sheet is a sheet of tracing paper, in particular obtained by intensely refining the cellulose fibres from which it is composed.
  5. A sheet according to one of the preceding claims, characterized in that the dry weight of said layer of the recto face is in the range 6 g/m2 to 20 g/m2, preferably in the range 8 g/m2 to 17g/m2.
  6. A sheet according to one of the preceding claims, characterized in that said layer comprises:
    • 5 to 12 parts dry weight of expanded thermoplastic microspheres, preferably 6 to 9 parts;
    • 15 to 95 parts dry weight of a binder having a glass transition temperature in the range -10°C to 35°C, preferably in the range 20 to 40 parts;
    • 0 to 75 parts dry weight of mineral pigments, preferably 40 to 75 parts;
    • 0 to 40 parts dry weight of dye(s);
    the sum of the parts being 100.
  7. A sheet according to one of the preceding claims, characterized in that said microspheres are expanded thermoplastic spheres comprising a gas.
  8. A sheet according to one of the preceding claims, characterized in that said microspheres are thermoplastic spheres expanded at a temperature in the range 90°C to 115°C, preferably in the range 100°C to 110°C.
  9. A sheet according to one of the preceding claims, characterized in that the composition for treatment of the other, verso, face comprises a compound selected from sizes, in particular from alkyl ketene dimers and polyolefin waxes, in particular polyethylene, preferably as a mixture with a binder used in papermaking, in particular a starch or a polyvinyl alcohol, and optionally a rheological agent.
  10. A sheet according to one of the preceding claims, characterized in that at least one of the faces comprises an ionizable salt, in particular sodium chloride.
  11. A sheet according to one of the preceding claims, characterized in that, at least under the layer of microspheres, the support sheet has a colour and/or a layer and/or printing that is visible through the layer.
  12. A process for producing a sheet according to one of the preceding claims in a papermaking procedure, characterized in that it comprises the following steps:
    a) forming a support sheet from a suspension, in an aqueous medium, of cellulose fibres and optionally of synthetic fibres, mixed with mineral fillers, at least one binder, and, again optionally, a dye, a wet strength agent and other additives that are in normal use in papermaking;
    b) treating one of the faces of the sheet, termed the verso face, with a composition for improving the coefficient of friction;
    c) optionally, drying the sheet obtained at about 100°C;
    d) treating the other of the faces of the sheet obtained, termed the recto face, with a composition comprising, in an aqueous medium:
    • 5 to 12 parts dry weight of expanded thermoplastic microspheres, preferably 6 to 9 parts;
    • 15 to 95 parts dry weight of a binder having a glass transition temperature in the range -10°C to 35°C, preferably in the range 20 to 40 parts;
    • 0 to 75 parts dry weight of mineral pigments, preferably 40 to 75 parts;
    • 0 to 20 parts dry weight of dye(s);
    the sum of the parts being 100;
    e) exposing the sheet to a temperature in the range 90°C to 115°C, preferably in the range 100°C to 110°C, to both dry the sheet and expand the microspheres;
    f) winding the sheet.
  13. A process for producing a sheet according to the preceding claim, characterized in that step b) is carried out on a size press and step c) is carried out on an air knife coater.
  14. A process for producing a sheet according to one of the preceding claims using a papermaking procedure, characterized in that it comprises the following steps:
    a) forming a support sheet from a suspension, in an aqueous medium, of cellulose fibres and optionally of synthetic fibres, mixed with mineral fillers, at least one binder and, again optionally, a dye, a wet strength agent and other additives that are in normal use in papermaking;
    b) treating one of the faces of the sheet, termed the verso face, with a composition for improving the coefficient of friction and simultaneously treating the other face of the sheet obtained, termed the recto face, with a composition comprising, in an aqueous medium:
    • 5 to 12 parts dry weight of expanded thermoplastic microspheres, preferably 6 to 9 parts;
    • 15 to 95 parts dry weight of a binder having a glass transition temperature in the range -10°C to 35°C, preferably in the range 20 to 40 parts;
    • 0 to 75 parts dry weight of mineral pigments, preferably 40 to 75 parts;
    • 0 to 20 parts dry weight of dye(s);
    the sum of the parts being 100;
    c) exposing the sheet obtained to a temperature in the range 90°C to 115°C, preferably in the range 100°C to 110°C, to both dry the sheet and expand the microspheres;
    d) winding the sheet.
  15. A process for producing a sheet according to claim 14, characterized in that step b) is carried out on a double face film transfer size press.
  16. A process for producing a sheet according to one of claims 12 to 15, characterized in that in step a), the cellulose fibres are refined at a high degree of refining, preferably 90°SR or more.
  17. Use of a sheet according to one of the preceding claims for the production of a wrapper for cosmetic skin products, having an essential feature of being reminiscent of the end use of the product to be wrapped by having a skin-like feel, the face comprising said microspheres forming the outer face of said wrapper.
  18. A wrapper for cosmetic skin products having an essential feature of being reminiscent of the end use of the product to be wrapped by having a skin-like feel, obtained from a sheet according to one of the preceding claims.
  19. A process for producing a wrapper, characterized in that:
    • a wound sheet according to one of claims 1 to 11 is used or a sheet is produced in accordance with one of the processes described in one of claims 12 to 16;
    • the wound sheet is cut into sheets with given formats;
    • the recto face of said formatted sheets is printed at a speed of at least 8000 sheets per hour;
    • said formatted sheets are cut to the desired wrapper model;
    • adhesive is applied to said verso face and/or to said recto face, at least over the assembling zones;
    • the assembling zones are bonded and the assembly is produced in accordance with the desired model, the face comprising said expanded microspheres forming the outer face of said wrapper.
EP00400828A 1999-03-26 2000-03-24 Sheet having a skin touch, printable at high rate, process for making the same, and packaging made therewith Expired - Lifetime EP1039025B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9903837 1999-03-26
FR9903837A FR2791368B1 (en) 1999-03-26 1999-03-26 SHEET WITH HIGH PRICE PRINTABLE "SKIN" TOUCH AND METHOD FOR MANUFACTURING AND PACKAGING COMPRISING SAME

Publications (2)

Publication Number Publication Date
EP1039025A1 EP1039025A1 (en) 2000-09-27
EP1039025B1 true EP1039025B1 (en) 2010-12-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00400828A Expired - Lifetime EP1039025B1 (en) 1999-03-26 2000-03-24 Sheet having a skin touch, printable at high rate, process for making the same, and packaging made therewith

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EP (1) EP1039025B1 (en)
AT (1) ATE491842T1 (en)
DE (1) DE60045353D1 (en)
ES (1) ES2354243T3 (en)
FR (1) FR2791368B1 (en)
PT (1) PT1039025E (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI4917U1 (en) * 2000-11-17 2001-05-16 Petersonwalki Oy Coated cover paper and packaging material
FR2833022B1 (en) * 2001-12-04 2004-07-02 Arjo Wiggins Dessin Et Papiers SHEET HAVING ROUGH TOUCH
FR2833625B1 (en) * 2001-12-18 2004-03-05 Arjo Wiggins Dessin Et Papiers COATING PAPER HAVING A SILKY TOUCH
FR2834730B1 (en) * 2002-01-11 2004-02-13 Jean Pierre Croquelois ANTI-SLIP COMPOSITION WITH WATER BARRIER FOR USE IN A SIZING PRESS ON A PAPER MACHINE AND ANTI-SLIP SUPPORTS THUS OBTAINED
JP4896024B2 (en) 2004-08-25 2012-03-14 オムノバ ソリューソンズ インコーポレーティッド Manufacture of paper using agglomerated hollow particle latex
FR2879225B1 (en) * 2004-12-15 2007-02-16 Honnorat Rech S & Services Sar GLOSSY PAPER
FR2891837B1 (en) * 2005-10-07 2012-03-30 Cgp Ind AQUEOUS COMPOSITION FOR PRODUCING COATING BATHS IN ORDER TO PRODUCE SUITABLE SUBSTRATES OF ANTI-SLIP PROPERTIES, METHOD FOR PRODUCING SUCH SUPPORTS AND SUPPORTS THUS OBTAINED
FR2942169B1 (en) * 2009-02-13 2011-04-01 Arjo Wiggins Fine Papers Ltd MULTILAYER PRINTABLE SHEET WITH SOFT OR SOYE TOUCH AND ITS MANUFACTURING METHOD
EP3483337B1 (en) * 2017-11-14 2021-12-08 Aw Branding Limited Recyclable and repulpable translucent or transparent paper - use for packaging applications

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1401533A (en) * 1972-08-02 1975-07-16 British American Tobacco Co Surface finishes
FR2395141A1 (en) * 1977-06-21 1979-01-19 Centre Tech Ind Papier Slip resistant sheet comprising support - coated with paper coating compsn. contg. hollow microspheres of polyvinylidene chloride and opt. polyacrylonitrile
US4753831A (en) * 1986-02-10 1988-06-28 Otsuka Foods Co., Ltd. Cardboard container with anti-slip property
JPS63146945A (en) * 1986-08-08 1988-06-18 Kao Corp Antisliding sheet
FR2635506B1 (en) * 1988-08-12 1990-11-30 Lembacel Sa SHEET OF PAPER HAVING ANTI-SLIP PROPERTIES, MANUFACTURING METHOD AND APPLICATION IN PACKAGING
MX9207126A (en) * 1991-12-31 1993-06-01 Kimberly Clark Co SUBSTRATE HAVING A SMOOTH NON-ABRASIVE ANTI-SLIP COATING.

Also Published As

Publication number Publication date
EP1039025A1 (en) 2000-09-27
FR2791368B1 (en) 2001-06-01
FR2791368A1 (en) 2000-09-29
ES2354243T3 (en) 2011-03-11
DE60045353D1 (en) 2011-01-27
ATE491842T1 (en) 2011-01-15
PT1039025E (en) 2011-01-05

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