EP0739435A1 - Impregnated sheet used as a basis for a decorative coating - Google Patents

Impregnated sheet used as a basis for a decorative coating

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Publication number
EP0739435A1
EP0739435A1 EP94902840A EP94902840A EP0739435A1 EP 0739435 A1 EP0739435 A1 EP 0739435A1 EP 94902840 A EP94902840 A EP 94902840A EP 94902840 A EP94902840 A EP 94902840A EP 0739435 A1 EP0739435 A1 EP 0739435A1
Authority
EP
European Patent Office
Prior art keywords
poly
sheet
parts
styrene
dry weight
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
EP94902840A
Other languages
German (de)
French (fr)
Other versions
EP0739435B1 (en
Inventor
Claude Perrin
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.)
ArjoWiggins SAS
Original Assignee
ArjoWiggins SAS
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 ArjoWiggins SAS filed Critical ArjoWiggins SAS
Priority to ES94902840T priority Critical patent/ES2125433T3/en
Publication of EP0739435A1 publication Critical patent/EP0739435A1/en
Application granted granted Critical
Publication of EP0739435B1 publication Critical patent/EP0739435B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C5/00—Processes for producing special ornamental bodies
    • B44C5/04—Ornamental plaques, e.g. decorative panels, decorative veneers
    • B44C5/0469—Ornamental plaques, e.g. decorative panels, decorative veneers comprising a decorative sheet and a core formed by one or more resin impregnated sheets of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/35—Polyalkenes, e.g. polystyrene
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • 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
    • D21H27/18—Paper- or board-based structures for surface covering
    • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
    • D21H27/24—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the surface to be covered being phenolic-resin paper laminates, vulcan fibre or similar cellulosic fibreboards
    • 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]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • 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
    • Y10T428/31975—Of cellulosic next to another carbohydrate
    • Y10T428/31978—Cellulosic next to another cellulosic
    • 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
    • Y10T428/31975—Of cellulosic next to another carbohydrate
    • Y10T428/31978—Cellulosic next to another cellulosic
    • Y10T428/31982—Wood or paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • the invention relates to a paper sheet impregnated with a composition in an aqueous medium used as a decorative coating base in the manufacture of decorative panels or profiles.
  • the invention also relates to the impregnation composition as well as the laminates or decorative profiles comprising this sheet.
  • the so-called high pressure panels are produced from a core consisting of sheets, generally made of kraft paper, impregnated with thermosetting resin and more particularly with a phenolic resin.
  • a decorative sheet is placed on the stack of sheets constituting the core, which is generally a sheet of paper bearing a printed or colored pattern or comprising decorative particles, impregnated with a thermosetting resin which does not yellow with heat.
  • a protective covering sheet called an "overlay", without pattern and transparent in the final laminate, is placed above the decorative sheet.
  • the stack of impregnated sheets is then placed in a press fitted with a sheet giving the surface condition. Then, the stack is densified by heating and pressing to obtain a unitary structure.
  • This structure is then fixed on a basic support, for example it is glued to a particle board.
  • thermosetting and possibly an "overlay” sheet which is laminated directly on the base support.
  • the third kind of decorative panels is constituted by the panels composed of a basic support, in general a panel of particles of wood or agglomerated fibers, and a sheet of decorative paper impregnated with a composition, fixed on the support by means of an adhesive.
  • the sheet of paper is a decorative sheet of uniform color or with decorative patterns.
  • the patterns are generally applied by printing on the sheet, before or after impregnation. We also apply a varnish or lacquer which aims to protect the surface of the sheet.
  • compositions comprising aqueous dispersions based on styrene-acrylate copolymer.
  • d • ethyl butyl acrylate and an aqueous solution of resins comprising formaldehyde such as melamine-formaldehyde or urea-formaldehyde resins.
  • the sheets impregnated online on a paper machine are said to be prepregs and those impregnated offline are said to be post-impregnated.
  • the invention relates to these two types of impregnated sheets.
  • Another important disadvantage is that their flexibility or aptitude to be deformed is a little insufficient, they are fragile with the handling, one thus observes cracks or cracking of the sheet when it is applied on a non planar surface that is ie in relief or in hollow or which has edges.
  • the sheets must be both sufficiently flexible and deformable to allow their use as a coating for non-planar surfaces and have a high internal cohesion, but those skilled in the art know that it is difficult to obtain these two characteristics simultaneously for a leaf.
  • the problem to be solved is therefore to provide impregnated sheets not comprising formaldehyde while having the characteristics required for its application, in particular a high internal cohesion combined with good deformability.
  • the sheets must also have a good printability and have a good ability for lacquering or varnishing.
  • the Applicant has found that the problems are solved by using as an impregnation composition, a composition free from formaldehyde and which comprises a crosslinkable polymer and having a glass transition temperature of between ⁇ 10 and 35 ° C., used in the form of a stable aqueous dispersion, other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
  • a polymer in the form of microdroplets in stable aqueous dispersion is also called latex.
  • the glass transition temperature (denoted Tg) is between 0 and 20 ° C.
  • the lower limit of the Tg is justified in particular by the fact that if the Tg is very low, the composition can cause problems of fouling on the machine. According to the examples described below, if the Tg is too high (greater than about 40 ° C.), the ability of the sheet to deform is low.
  • invention provides an impregnated sheet for decorative coating characterized in that it is impregnated with a composition comprising a mixture of a crosslinkable polymer and having a glass transition temperature between -10 and 35 ° C, used in the form of a stable aqueous dispersion, other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
  • the polymer can be self-crosslinkable or crosslinkable by the action of an external agent.
  • the invention is characterized by the fact that the crosslinkable polymer used in the form of a stable aqueous dispersion is chosen from styrene-butadiene copolymers, styrene-butadiene carboxylated copolymers, polymers of vinyl acetate, poly (ethylene / vinyl acetate), acrylic polymers and derivatives other than a styrene-ethyl acrylate-butyl acrylate copolymer, urethane polymers and their mixtures.
  • the crosslinkable polymer used in the form of a stable aqueous dispersion is chosen from styrene-butadiene copolymers, styrene-butadiene carboxylated copolymers, polymers of vinyl acetate, poly (ethylene / vinyl acetate), acrylic polymers and derivatives other than a styrene-ethyl acrylate-butyl acrylate copolymer, urethane
  • the invention is characterized in that the water-soluble binder is chosen from polyvinyl alcohol, gelatin, starches, cellulose derivatives, alginates and their mixtures.
  • cellulose derivatives carboxymethylcellulose can be used in particular.
  • the sheet according to the invention is characterized in that it is impregnated with a composition comprising 95 to 50 parts by dry weight of crosslinkable polymer and 5 to 50 parts by dry weight of water-soluble binder, the sum of the respective parts being equal to 100.
  • the water-soluble binder is a polyvinyl alcohol having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s, [determined at 20 ° C according to " standard DIN 53015 for a 4% solution].
  • the degree of hydrolysis is expressed as usual in% of moles of hydrolyzed acetate.
  • the sheet is impregnated with a composition comprising 70 to 90 parts by dry weight of poly (ethylene / vinyl acetate) and 30 to 10 parts by dry weight of the defined poly (vinyl alcohol) above, the sum of the respective shares being equal to 100.
  • the invention also relates to laminates or decorative profiles comprising such a sheet as a decorative sheet.
  • the invention also relates to the aqueous composition for impregnating the sheet.
  • the impregnating composition for impregnating the sheet serving as a base for decorative coatings is therefore characterized by the fact that it comprises, as a mixture, a stable aqueous dispersion of a crosslinkable polymer, having a glass transition temperature of between -10 and 35 °. C, other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
  • the composition is characterized in that the water-soluble binder is chosen from poly (vinyl alcohol), gelatin, starches, cellulose derivatives, alginates and their mixtures.
  • the water-soluble binder is chosen from poly (vinyl alcohol), gelatin, starches, cellulose derivatives, alginates and their mixtures.
  • the composition is characterized by the fact that the crosslinkable polymer in stable aqueous dispersion is chosen from styrene-butadiene copolymers, styrene-butadiene carboxylated copolymers, vinyl acetate polymers including poly (ethylene / acetate vinyl), acrylic polymers and derivatives other than a styrene-ethyl acrylate-butyl acrylate copolymer, urethane polymers and their mixtures.
  • the composition preferably comprises 95 to 50 parts by dry weight of crosslinkable polymer, used in the form of a stable aqueous dispersion and 5 to 50 parts by dry weight of water-soluble binder, the sum of the respective parts being equal to 100.
  • the water-soluble binder is a polyvinyl alcohol having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s [determined at 20 ° C. according to standard DIN 53015 for a 4% solution].
  • the composition comprises 70 to 90 parts by dry weight of poly (ethylene / vinyl acetate) and 30 to 10 parts by dry weight of poly (vinyl alcohol), the sum of the respective parts being equal to 100.
  • the impregnating composition has a BROOKFIELD viscosity of less than 200 mPa.s, measured at 100 revolutions per minute so that the sheet can be well impregnated.
  • the impregnation composition may also include formaldehyde-free adjuvants usually used in stationery to facilitate the impregnation and drying of the sheet such as wetting agents, coalescing agents, lubricants such as calcium stearate, insolubilizers.
  • formaldehyde-free adjuvants usually used in stationery to facilitate the impregnation and drying of the sheet such as wetting agents, coalescing agents, lubricants such as calcium stearate, insolubilizers.
  • EXAMPLE 1 according to the prior art; A sheet of paper is conventionally formed from a composition of cellulose fibers, a binder and other papermaking adjuvants. The leaf is wrung and then dried; the sheet obtained has a grammage of 45 g / m.
  • the sheet is impregnated in a size press with a composition containing 80 parts by dry weight of a latex of a styrene-ethyl acrylate-butyl acrylate and 20 parts by dry weight of urea-formaldehyde resin, added in the form aqueous solution.
  • the BROOKFIELD viscosity measured with a mobile at 100 rpm is 40 mPa. s.
  • the sheet is dried at around 120 ° C. A sheet having a grammage of 60 g / m is obtained.
  • the amount of formaldehyde is 1.5.
  • the internal cohesion of the lacquered sheet is measured to estimate its resistance to delamination and peeling, by a peeling test with an adhesive tape according to the following method: a strip of the sheet previously cut is fixed either in the machine direction of the paper, either crosswise on a
  • the adhesive tape is torn off from the sheet by its free end.
  • the adhesive tape is applied to a white or black background depending on the shade of the test.
  • the ribbon is checked on a white background.
  • the resistance to deformability of the lacquered sheet is tested by a crinkle resistance test described in the article.
  • a sheet is produced as in Example 1, but it is impregnated with a composition containing 80 parts by dry weight of a poly (ethylene / vinyl acetate) latex - called self-crosslinking EVA and whose glass transition temperature Tg is of 6 ° C, and 20 parts by dry weight of poly (vinyl alcohol) having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s [determined at 20 ° C according to standard DIN 53015 for a solution with 4%], added in the form of a 10% aqueous solution.
  • the dry extract is adjusted so that the composition has a BROOKFIELD viscosity measured with a mobile at 100 rpm of 80 mPa.s.
  • the amount of formaldehyde is less than 0.15 mg / (h.m). Its printability and its ability to varnish are of a level as good as that of Example 1.
  • the number of creases is 8, which represents a very significant gain compared to the sheets according to the prior art.
  • a sheet is produced as in Example 1, but it is impregnated with a composition containing 80 parts by dry weight of a polyacrylic latex, self-crosslinking and having a Tg of 32 ° C., and 20 parts by dry weight of the poly ( vinyl alcohol) used in the example
  • the dry extract is adjusted so that the composition has a viscosity
  • the amount of formaldehyde is less than 0.15 mg / (hm 2 ).
  • EXAMPLE 4 A sheet is produced as in Example 1, but it is impregnated with a composition containing 80 parts by dry weight of a crosslinkable poly (stryrene-butadiene-acrylate) latex and having a Tg of around 16 ° C., and 20 parts by dry weight of the polyvinyl alcohol used in Example 2.
  • a crosslinkable poly (stryrene-butadiene-acrylate) latex having a Tg of around 16 ° C., and 20 parts by dry weight of the polyvinyl alcohol used in Example 2.
  • the dry extract is adjusted so that the composition has a BROOKFIELD viscosity measured with a mobile at 100 rpm of 75 mPa.s.
  • the sheet thus impregnated is tested as in Example 1.
  • the amount of formaldehyde is less than 0.15 mg / (h.m 2).
  • the number of creases is 8.
  • a sheet is produced as in Example 1 but it is impregnated with a composition containing 80 parts by dry weight of a latex of a cross-linkable styrene-acrylate copolymer and having a Tg of approximately 50 ° C., and 20 parts by dry weight of the poly (vinyl alcohol) used in Example 2.
  • the dry extract is adjusted so that the composition has a BROOKFIELD viscosity measured with a mobile at 100 rpm of 75 mPa.s.
  • the sheet thus impregnated is tested as in Example 1.
  • the amount of formaldehyde is less than 0.15 mg / (hm 2 ).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)

Abstract

PCT No. PCT/FR93/01275 Sec. 371 Date Jun. 20, 1996 Sec. 102(e) Date Jun. 20, 1996 PCT Filed Dec. 21, 1993 PCT Pub. No. WO95/17551 PCT Pub. Date Jun. 29, 1995The invention relates to an impregnated sheet. It is impregnated with a composition containing, as a mixture, a crosslinkable polymer having a glass transition temperature of between -10 DEG and 35 DEG C., used in the form of a stable aqueous dispersion, other than a styrene/ethyl acrylate/butyl acrylate copolymer, and a water-soluble binder. According to the invention, the water-soluble binder is chosen from poly(vinyl alcohol), gelatin, starches, cellulose derivatives, alginates and mixtures thereof. Application to laminated decorative coverings.

Description

FEUILLE IMPREGNEE UTILISEE COMME BASE DE REVETEMENT DECORATIF IMPREGNATED SHEET USED AS A BASE FOR DECORATIVE COATING
L'invention concerne une feuille papetière imprégnée d'une composition en milieu aqueux utilisée comme base de revêtement décoratif dans la fabrication des panneaux ou profilés décoratifs. L'invention concerne aussi la composition d'imprégnation ainsi que les stratifiés ou profilés décoratifs comportant cette feuille.The invention relates to a paper sheet impregnated with a composition in an aqueous medium used as a decorative coating base in the manufacture of decorative panels or profiles. The invention also relates to the impregnation composition as well as the laminates or decorative profiles comprising this sheet.
Depuis de nombreuses années, on emploie des panneaux décoratifs comme matériaux dans les habitations et les locaux commerciaux et industriels. Une application typique de tels panneaux est le revêtement superficiel des meubles, des dessus de table, des murs et autres.For many years, decorative panels have been used as materials in dwellings and commercial and industrial premises. A typical application of such panels is the surface coating of furniture, table tops, walls and the like.
Il existe plusieurs sortes de panneaux décoratifs : les panneaux dits haute pression, les panneaux dits basse pression et les panneaux recouverts d'une feuille adhésive.There are several kinds of decorative panels: so-called high pressure panels, so-called low pressure panels and panels covered with an adhesive sheet.
On produit les panneaux dits haute pression à partir d'une âme constituée de feuilles, généralement en papier kraft, imprégnées de résine thermodurcissable et plus particulièrement d'une résine phénolique. On place sur la pile de feuilles constituant l'âme, une feuille décorative qui est en général une feuille de papier portant un motif imprimé ou de couleur ou comportant des particules décoratives, imprégnée d'une résine thermodurcissable ne jaunissant pas à la chaleur. En général, on place au-dessus de la feuille décorative, une feuille protectrice de recouvrement, appelée "overlay", dépourvue de motif et transparente dans le stratifié final. On place ensuite la pile de feuilles imprégnées dans une presse munie d'une tôle conférant l'état de surface. Puis, on densifie la pile par chauffage et pressage pour obtenir une structure unitaire.The so-called high pressure panels are produced from a core consisting of sheets, generally made of kraft paper, impregnated with thermosetting resin and more particularly with a phenolic resin. A decorative sheet is placed on the stack of sheets constituting the core, which is generally a sheet of paper bearing a printed or colored pattern or comprising decorative particles, impregnated with a thermosetting resin which does not yellow with heat. In general, a protective covering sheet, called an "overlay", without pattern and transparent in the final laminate, is placed above the decorative sheet. The stack of impregnated sheets is then placed in a press fitted with a sheet giving the surface condition. Then, the stack is densified by heating and pressing to obtain a unitary structure.
On fixe ensuite cette structure sur un support de base, par exemple on la colle sur un panneau de particules.This structure is then fixed on a basic support, for example it is glued to a particle board.
On produit des panneaux dits basse pression en utilisant uniquement une feuille décorative imprégnée de résineSo-called low pressure panels are produced using only a decorative sheet impregnated with resin
FEUILLEDEREMPLACEMENT{REGLE26) thermodurcissable (et éventuellement une feuille "overlay") que l'on stratifié directement sur le support de base.LOCATION SHEET {RULE 26) thermosetting (and possibly an "overlay" sheet) which is laminated directly on the base support.
La troisième sorte de panneaux décoratifs est constituée par les panneaux composés d'un support de base, en général un panneau de particules de bois ou de fibres agglomérées, et d'une feuille de papier décorative imprégnée d'une composition, fixée sur le support au moyen d'un adhésif.The third kind of decorative panels is constituted by the panels composed of a basic support, in general a panel of particles of wood or agglomerated fibers, and a sheet of decorative paper impregnated with a composition, fixed on the support by means of an adhesive.
La feuille de papier est une feuille décorative de couleur uniforme ou comportant des motifs décoratifs. Les motifs sont généralement appliqués par impression sur la feuille, avant ou après imprégnation. On applique en plus un vernis ou une laque qui a pour but de protéger la surface de la feuille.The sheet of paper is a decorative sheet of uniform color or with decorative patterns. The patterns are generally applied by printing on the sheet, before or after impregnation. We also apply a varnish or lacquer which aims to protect the surface of the sheet.
Ces feuilles sont le plus souvent imprégnées à l'aide d'une presse encolleuse ou d'un autre dispositif d'imprégnation sur une machine à papier ou hors machine à papier, avec des compositions comportant des dispersions aqueuses à base de copolymère styrene- acrylate d•éthyle-acrylate de butyle et d'une solution aqueuse de résines comportant du formaldéhyde comme les résines mélamine- formaldéhyde ou urée-formaldéhyde.These sheets are most often impregnated using a size press or other impregnation device on a paper machine or outside of a paper machine, with compositions comprising aqueous dispersions based on styrene-acrylate copolymer. d • ethyl butyl acrylate and an aqueous solution of resins comprising formaldehyde such as melamine-formaldehyde or urea-formaldehyde resins.
Les feuilles imprégnées en ligne sur machine à papier sont dites préimprégnées et celles imprégnées hors ligne sont dites post¬ imprégnées. L'invention concerne ces deux types de feuilles imprégnées.The sheets impregnated online on a paper machine are said to be prepregs and those impregnated offline are said to be post-impregnated. The invention relates to these two types of impregnated sheets.
Un inconvénient majeur de ces feuilles ainsi imprégnées est qu'elles contiennent du formaldéhyde qui est néfaste à la santé; le taux de ce composé étant soumis à une législation de plus en plus limitative.A major drawback of these sheets thus impregnated is that they contain formaldehyde which is harmful to health; the level of this compound being subject to increasingly restrictive legislation.
Un autre inconvénient important est que leur flexibilité ou aptitude à être déformée est un peu insuffisante, elles sont fragiles à la manipulation, on observe donc des cassures ou craquèlements de la feuille lorsqu'on l'applique sur une surface non plane c'est-à-dire en relief ou en creux ou qui présente des arêtes.Another important disadvantage is that their flexibility or aptitude to be deformed is a little insufficient, they are fragile with the handling, one thus observes cracks or cracking of the sheet when it is applied on a non planar surface that is ie in relief or in hollow or which has edges.
Par ailleurs elles doivent avoir une bonne résistance à la déla ination, donc une bonne cohésion interne, afin qu'elles ne se désolidarisent pas du support sur lequel elles sont collées ni qu'il n'y ait de problèmes d'arrachage ou de détérioration de ces feuilles lors de l'usinage des panneaux.Furthermore, they must have good resistance to dela ination, therefore good internal cohesion, so that they do not do not separate from the support on which they are glued nor that there are problems of tearing or deterioration of these sheets during the machining of the panels.
Ainsi les feuilles doivent être à la fois suffisamment souples et déformables pour permettre leur utilisation comme revêtement des surfaces non planes et avoir une cohésion interne élevée, or l'homme du métier sait qu'il est difficile d'obtenir simultanément ces deux caractéristiques pour une feuille.Thus the sheets must be both sufficiently flexible and deformable to allow their use as a coating for non-planar surfaces and have a high internal cohesion, but those skilled in the art know that it is difficult to obtain these two characteristics simultaneously for a leaf.
Le problème à résoudre est donc de fournir des feuilles imprégnées ne comportant pas de formaldéhyde tout en ayant les caractéristiques requises à son application, en particulier une cohésion interne élevée alliée à une bonne déformabilité.The problem to be solved is therefore to provide impregnated sheets not comprising formaldehyde while having the characteristics required for its application, in particular a high internal cohesion combined with good deformability.
Les feuilles doivent avoir aussi une bonne imprimabilité et avoir une bonne aptitude au laquage ou vernissage.The sheets must also have a good printability and have a good ability for lacquering or varnishing.
Dans la demande française enregistrée sous le numéro FR9207558, on décrit une composition d'imprégnation d'une feuille pour revêtement décoratif qui est exempte de formaldéhyde et qui comporte un copolymère styrene-acrylate d'éthyle-acrylate de butyle et un liant.In the French application registered under number FR9207558, a composition for impregnating a sheet for decorative coating which is free of formaldehyde and which comprises a styrene-ethyl acrylate-butyl acrylate copolymer and a binder is described.
La demanderesse a trouvé que les problèmes sont résolus en utilisant comme composition d'imprégnation, une composition exempte de formaldéhyde et qui comporte un polymère réticulable et ayant une température de transition vitreuse comprise entre - 10 et 35°C, utilisé sous forme d'une dispersion aqueuse stable , autre qu'un copolymère styrene-acrylate d•éthyle-acrylate de butyle, et un liant hydrosoluble.The Applicant has found that the problems are solved by using as an impregnation composition, a composition free from formaldehyde and which comprises a crosslinkable polymer and having a glass transition temperature of between −10 and 35 ° C., used in the form of a stable aqueous dispersion, other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
Un polymère sous forme de microgoutelettes en dispersion aqueuse stable est aussi appelé latex. De préférence, la température de transition vitreuse (notée Tg) est comprise entre 0 et 20°C.A polymer in the form of microdroplets in stable aqueous dispersion is also called latex. Preferably, the glass transition temperature (denoted Tg) is between 0 and 20 ° C.
La limite inférieure de la Tg est justifiée notamment par le fait que si la Tg est très basse, la composition peut poser des problèmes d'encrassement sur machine. D'après les exemples décrits plus loin, si la Tg est trop élevée (supérieure à 40°C environ), l'aptitude de la feuille à se déformer est faible.The lower limit of the Tg is justified in particular by the fact that if the Tg is very low, the composition can cause problems of fouling on the machine. According to the examples described below, if the Tg is too high (greater than about 40 ° C.), the ability of the sheet to deform is low.
Ainsi 1•invention fournit une feuille imprégnée pour revêtement décoratif caractérisée par le fait qu'elle est imprégnée d'une composition comportant en mélange un polymère reticulable et ayant une température de transition vitreuse comprise entre -10 et 35°C, utilisé sous forme d'une dispersion aqueuse stable, autre qu'un copolymère styrene-acrylate d*éthyle-acrylate de butyle, et un liant hydrosoluble.Thus 1 • invention provides an impregnated sheet for decorative coating characterized in that it is impregnated with a composition comprising a mixture of a crosslinkable polymer and having a glass transition temperature between -10 and 35 ° C, used in the form of a stable aqueous dispersion, other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
Le polymère peut être autoréticulable ou reticulable par action d'un agent extérieur.The polymer can be self-crosslinkable or crosslinkable by the action of an external agent.
Plus particulièrement l'invention se caractérise par le fait que le polymère reticulable utilisé sous forme d'une dispersion aqueuse stable est choisi parmi les copolymères de styrène- butadiène, les copolymères de styrène-butadiène carboxylés, les polymères de l'acétate de vinyle dont le poly(éthylène/acétate de vinyle) , les polymères acryliques et dérivés autre qu'un copolymère styrene-acrylate d'éthyle-acrylate de butyle, les polymères uréthanes et leurs mélanges. Par polymère, il faut comprendre homopolymère ou copolymère.More particularly, the invention is characterized by the fact that the crosslinkable polymer used in the form of a stable aqueous dispersion is chosen from styrene-butadiene copolymers, styrene-butadiene carboxylated copolymers, polymers of vinyl acetate, poly (ethylene / vinyl acetate), acrylic polymers and derivatives other than a styrene-ethyl acrylate-butyl acrylate copolymer, urethane polymers and their mixtures. By polymer, it is necessary to understand homopolymer or copolymer.
Plus particulièrement l'invention se caractérise par le fait que le liant hydrosoluble est choisi parmi les poly(alcool de vinyle) , la gélatine, les amidons, les dérivés de cellulose, les alginates et leurs mélanges. Comme dérivés de cellulose on peut utiliser notamment la carboxyméthylcellulose.More particularly, the invention is characterized in that the water-soluble binder is chosen from polyvinyl alcohol, gelatin, starches, cellulose derivatives, alginates and their mixtures. As cellulose derivatives, carboxymethylcellulose can be used in particular.
De préférence la feuille selon 1'invention se caractérise par le fait qu'elle est imprégnée d'une composition comportant 95 à 50 parts en poids sec de polymère reticulable et 5 à 50 parts en poids sec de liant hydrosoluble, la somme des parts respectives étant égale à 100.Preferably, the sheet according to the invention is characterized in that it is impregnated with a composition comprising 95 to 50 parts by dry weight of crosslinkable polymer and 5 to 50 parts by dry weight of water-soluble binder, the sum of the respective parts being equal to 100.
Selon un cas particulier de l'invention, le liant hydrosoluble est un poly(alcool de vinyle) ayant un degré d'hydrolyse de 98- 99 et une viscosité de 4 mPa.s, [déterminée à 20°C selon "la norme DIN 53015 pour une solution à 4%].According to a particular case of the invention, the water-soluble binder is a polyvinyl alcohol having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s, [determined at 20 ° C according to " standard DIN 53015 for a 4% solution].
Le degré d'hydrolyse est exprimé comme habituellement en % de moles d'acétate hydrolysées.The degree of hydrolysis is expressed as usual in% of moles of hydrolyzed acetate.
Selon un cas préféré de l'invention, la feuille est imprégnée d'une composition comportant 70 à 90 parts en poids sec de poly(éthylène/acétate de vinyle) et 30 à 10 parts en poids sec du poly(alcool de vinyle) défini ci-dessus, la somme des parts respectives étant égale à 100.According to a preferred case of the invention, the sheet is impregnated with a composition comprising 70 to 90 parts by dry weight of poly (ethylene / vinyl acetate) and 30 to 10 parts by dry weight of the defined poly (vinyl alcohol) above, the sum of the respective shares being equal to 100.
L'invention concerne aussi les stratifiés ou profilés décoratifs comportant une telle feuille comme feuille décorative.The invention also relates to laminates or decorative profiles comprising such a sheet as a decorative sheet.
L'invention concerne aussi la composition aqueuse d'imprégnation de la feuille.The invention also relates to the aqueous composition for impregnating the sheet.
La composition d'imprégnation pour imprégner la feuille servant de base aux revêtements décoratifs se caractérise donc par le fait qu'elle comporte en mélange une dispersion aqueuse stable d'un polymère reticulable, ayant une température de transition vitreuse comprise entre -10 et 35°C, autre qu'un copolymère styrene-acrylate d'éthyle-acrylate de butyle, et un liant hydrosoluble.The impregnating composition for impregnating the sheet serving as a base for decorative coatings is therefore characterized by the fact that it comprises, as a mixture, a stable aqueous dispersion of a crosslinkable polymer, having a glass transition temperature of between -10 and 35 °. C, other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
En particulier la composition se caractérise par le fait que le liant hydrosoluble est choisi parmi les poly(alcool de vinyle) , la gélatine, les amidons, les dérivés de cellulose, les alginates et leurs mélanges.In particular, the composition is characterized in that the water-soluble binder is chosen from poly (vinyl alcohol), gelatin, starches, cellulose derivatives, alginates and their mixtures.
En particulier la composition se caractérise par le fait que le polymère reticulable en dispersion aqueuse stable est choisi parmi les copolymères de styrène-butadiène, les copolymères de styrène-butadiène carboxylés, les polymères de l'acétate de vinyle dont le poly(éthylène/acétate de vinyle) , les polymères acryliques et dérivés autre qu'un copolymère styrene-acrylate d'éthyle-acrylate de butyle, les polymères urethanes et leurs mélanges. \ z préférence la composition comporte 95 à 50 parts en poids sec de polymère reticulable, utilisé sous forme de dispersion aqueuse stable et 5 à 50 parts en poids sec de liant hydrosoluble, la somme des parts respectives étant égale à 100.In particular, the composition is characterized by the fact that the crosslinkable polymer in stable aqueous dispersion is chosen from styrene-butadiene copolymers, styrene-butadiene carboxylated copolymers, vinyl acetate polymers including poly (ethylene / acetate vinyl), acrylic polymers and derivatives other than a styrene-ethyl acrylate-butyl acrylate copolymer, urethane polymers and their mixtures. The composition preferably comprises 95 to 50 parts by dry weight of crosslinkable polymer, used in the form of a stable aqueous dispersion and 5 to 50 parts by dry weight of water-soluble binder, the sum of the respective parts being equal to 100.
De préférence le liant hydrosoluble est un poly(alcool de vinyle) ayant un degré d'hydrolyse de 98-99 et une viscosité de 4 mPa.s [déterminée à 20°C selon la norme DIN 53015 pour une solution à 4%].Preferably, the water-soluble binder is a polyvinyl alcohol having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s [determined at 20 ° C. according to standard DIN 53015 for a 4% solution].
Plus préférentiellement la composition comporte 70 à 90 parts en poids sec de poly(éthylène/acétâte de vinyle) et 30 à 10 parts en poids sec du poly(alcool de vinyle) , la somme des parts respectives étant égale à 100.More preferably, the composition comprises 70 to 90 parts by dry weight of poly (ethylene / vinyl acetate) and 30 to 10 parts by dry weight of poly (vinyl alcohol), the sum of the respective parts being equal to 100.
De préférence la composition d'imprégnation a une viscosité BROOKFIELD inférieure à 200 mPa.s, mesurée à 100 tours par minute afin que la feuille puisse être bien imprégnée.Preferably, the impregnating composition has a BROOKFIELD viscosity of less than 200 mPa.s, measured at 100 revolutions per minute so that the sheet can be well impregnated.
La composition d'imprégnation peut comporter aussi des adjuvants exempts de formaldéhyde utilisés habituellement en papeterie pour faciliter l'imprégnation et le séchage de la feuille tels que des agents mouillants, des agents de coalescence, des lubrifiants comme le stéarate de calcium, des insolubilisants.The impregnation composition may also include formaldehyde-free adjuvants usually used in stationery to facilitate the impregnation and drying of the sheet such as wetting agents, coalescing agents, lubricants such as calcium stearate, insolubilizers.
L'invention sera mieux comprise à l'aide des exemples non limitatifs suivants :The invention will be better understood using the following nonlimiting examples:
EXEMPLE 1 selon l'art antérieur ; On forme une feuille de papier classiquement à partir d'une composition de fibres de cellulose, d'un liant et d'autres adjuvants papetiers. On essore puis sèche la feuille; la feuille obtenue a un grammage de 45 g/m .EXAMPLE 1 according to the prior art; A sheet of paper is conventionally formed from a composition of cellulose fibers, a binder and other papermaking adjuvants. The leaf is wrung and then dried; the sheet obtained has a grammage of 45 g / m.
On imprègne la feuille en presse encolleuse d'une composition contenant 80 parts en poids sec d'un latex d'un copolymère styrene-acrylate d•éthyle-acrylate de butyle et 20 parts en poids sec de résine urée-formaldéhyde, ajoutée sous forme de solution aqueuse.The sheet is impregnated in a size press with a composition containing 80 parts by dry weight of a latex of a styrene-ethyl acrylate-butyl acrylate and 20 parts by dry weight of urea-formaldehyde resin, added in the form aqueous solution.
La viscosité BROOKFIELD mesurée avec un mobile à 100 tours/mn est de 40 mPa . s .The BROOKFIELD viscosity measured with a mobile at 100 rpm is 40 mPa. s.
On sèche la feuille vers 120 °C. On obtient une feuille ayant un grammage de 60 g/m . iThe sheet is dried at around 120 ° C. A sheet having a grammage of 60 g / m is obtained. i
5 On mesure la quantité de formaldéhyde qui se dégage de la feuille selon la norme DIN 52368; on l'exprime en mg de formaldéhyde5 The quantity of formaldehyde that emerges from the sheet is measured according to DIN standard 52368; it is expressed in mg of formaldehyde
« dégagé par heure et par mètre carré de feuille."Cleared per hour and per square meter of sheet.
Dans cet exemple la quantité de formaldéhyde est de 1,5.In this example, the amount of formaldehyde is 1.5.
10 On mesure la cohésion interne de la feuille laquée pour estimer sa résistance à la délamination et à l'arrachage, par un test d'arrachage avec un ruban adhésif selon la méthode suivante : on fixe une bande de la feuille préalablement découpée soit dans le sens machine du papier, soit dans le sens travers sur une10 The internal cohesion of the lacquered sheet is measured to estimate its resistance to delamination and peeling, by a peeling test with an adhesive tape according to the following method: a strip of the sheet previously cut is fixed either in the machine direction of the paper, either crosswise on a
15 plaque de verre à l'aide d'un ruban adhésif double face. On presse un morceau de ruban adhésif une face (Référence TESA 4204 de la société ) sur la bande de papier, une extrémité du morceau de ruban adhésif étant conservée libre par application sur un chevalet de 80 mm de hauteur.15 glass plate using double-sided adhesive tape. A piece of adhesive tape is pressed on one side (TESA reference 4204 from the company) on the paper strip, one end of the piece of adhesive tape being kept free by application on an easel 80 mm high.
20 Après un temps de 7 jours, on arrache le ruban adhésif de la feuille par son extrémité libre.After a period of 7 days, the adhesive tape is torn off from the sheet by its free end.
Pour voir à l'oeil nu si l'échantillon a été arraché, on applique le ruban adhésif sur un fond blanc ou noir selon la teinte de 1'épreuve.To see with the naked eye whether the sample has been torn off, the adhesive tape is applied to a white or black background depending on the shade of the test.
25 Dans le cas de l'exemple, on vérifie le ruban sur fond blanc.25 In the case of the example, the ribbon is checked on a white background.
On vérifie que la feuille s'imprime bien.We check that the sheet prints well.
On vérifie aussi que la feuille a une bonne aptitude au laquage, on utilise une laque à base de polyester. 30We also check that the sheet has a good ability to lacquering, we use a polyester-based lacquer. 30
On teste la résistance à la déformabilité de la feuille laquée par un test de résistance au froissement décrit dans l'articleThe resistance to deformability of the lacquered sheet is tested by a crinkle resistance test described in the article.
"WARING QUALITY OF EXPERIMENTAL CURRENCY-TYPE PAPERS, Journal of"WARING QUALITY OF EXPERIMENTAL CURRENCY-TYPE PAPERS, Journal of
Research of the National Bureau of Standards, Volume 36, pages 35 249 à 268, mars 1946. On détermine le nombre de froissements nécessaires pour observer la première craquelure de la laque.Research of the National Bureau of Standards, Volume 36, pages 35 249 to 268, March 1946. The number of crumplings necessary to observe the first cracking of the lacquer is determined.
Dans ce cas, le nombre de froissement est de 1, ce qui est très faible. EXEMPLE 2 selon 1'invention ;In this case, the number of creases is 1, which is very low. EXAMPLE 2 according to the invention;
On réalise une feuille comme dans l'exemple 1 mais on l'imprègne avec une composition contenant 80 parts en poids sec d'un latex de poly(éthylène/acétate de vinyle) - appelé EVA autoréticulable et dont la température de transition vitreuse Tg est de 6°C, et 20 parts en poids sec de poly(alcool vinylique) ayant un degré d'hydrolyse de 98-99 et une viscosité de 4 mPa.s [déterminée à 20°C selon la norme DIN 53015 pour une solution à 4%], ajouté sous forme d'une solution aqueuse à 10%. L'extrait sec est réglé pour que la composition ait une viscosité BROOKFIELD mesurée avec un mobile à 100 tours/mn de 80 mPa.s .A sheet is produced as in Example 1, but it is impregnated with a composition containing 80 parts by dry weight of a poly (ethylene / vinyl acetate) latex - called self-crosslinking EVA and whose glass transition temperature Tg is of 6 ° C, and 20 parts by dry weight of poly (vinyl alcohol) having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s [determined at 20 ° C according to standard DIN 53015 for a solution with 4%], added in the form of a 10% aqueous solution. The dry extract is adjusted so that the composition has a BROOKFIELD viscosity measured with a mobile at 100 rpm of 80 mPa.s.
On teste la feuille ainsi imprégnée comme dans l'exemple 1.The sheet thus impregnated is tested as in Example 1.
La quantité de formaldéhyde est inférieure à 0,15mg/(h.m ) . Son imprimabilité et son aptitude au vernissage sont d'un niveau aussi bon que celles de l'exemple 1.The amount of formaldehyde is less than 0.15 mg / (h.m). Its printability and its ability to varnish are of a level as good as that of Example 1.
Dans ce cas, le nombre de froissements est de 8, ce qui représente un gain très important par rapport aux feuilles selon l'art antérieur.In this case, the number of creases is 8, which represents a very significant gain compared to the sheets according to the prior art.
EXEMPLE 3 selon l'invention :EXAMPLE 3 according to the invention:
On réalise une feuille comme dans l'exemple 1 mais on l'imprègne avec une composition contenant 80 parts en poids sec d'un latex de polyacrylique, autoréticulable et ayant une Tg de 32°C, et 20 parts en poids sec du poly(alcool vinylique) utilisé à l'exempleA sheet is produced as in Example 1, but it is impregnated with a composition containing 80 parts by dry weight of a polyacrylic latex, self-crosslinking and having a Tg of 32 ° C., and 20 parts by dry weight of the poly ( vinyl alcohol) used in the example
2.2.
L'extrait sec est réglé pour que la composition ait une viscositéThe dry extract is adjusted so that the composition has a viscosity
BROOKFIELD mesurée avec un mobile à 100 tours/mn de 80 mPa.s .BROOKFIELD measured with a mobile at 100 rpm of 80 mPa.s.
On teste la feuille ainsi imprégnée comme dans l'exemple 1.The sheet thus impregnated is tested as in Example 1.
La quantité de formaldéhyde est inférieure à 0,15mg/(h.m2) .The amount of formaldehyde is less than 0.15 mg / (hm 2 ).
Son imprimabilité et son aptitude au vernissage sont d'un niveau aussi bon que celles de l'exemple 1. Dans ce cas, le nombre de froissements est de 4, ce qui représente un gain encore important par rapport à 1'art antérieur.Its printability and its ability to varnish are of a level as good as those of Example 1. In this case, the number of creases is 4, which represents a still significant gain compared to the prior art.
EXEMPLE 4 selon l'invention : On réalise une feuille comme dans l'exemple 1 mais on l'imprègne avec une composition contenant 80 parts en poids sec d'un latex de poly(stryrène-butadiène-acrylate) reticulable et ayant une Tg d'environ 16°C, et 20 parts en poids sec du poly(alcool vinylique) utilisé à l'exemple 2.EXAMPLE 4 according to the invention: A sheet is produced as in Example 1, but it is impregnated with a composition containing 80 parts by dry weight of a crosslinkable poly (stryrene-butadiene-acrylate) latex and having a Tg of around 16 ° C., and 20 parts by dry weight of the polyvinyl alcohol used in Example 2.
L'extrait sec est réglé pour que la composition ait une viscosité BROOKFIELD mesurée avec un mobile à 100 tours/mn de 75 mPa.s .The dry extract is adjusted so that the composition has a BROOKFIELD viscosity measured with a mobile at 100 rpm of 75 mPa.s.
On teste la feuille ainsi imprégnée comme dans l'exemple 1. La quantité de formaldéhyde est inférieure à 0,15mg/(h.m 2).The sheet thus impregnated is tested as in Example 1. The amount of formaldehyde is less than 0.15 mg / (h.m 2).
Son imprimabilité et son aptitude au vernissage sont d'un niveau aussi bon que celles de l'exemple 1.Its printability and its ability to varnish are of a level as good as that of Example 1.
Dans ce cas, le nombre de froissements est de 8.In this case, the number of creases is 8.
EXEMPLE 5 :EXAMPLE 5:
On réalise une feuille comme dans l'exemple 1 mais on l'imprègne avec une composition contenant 80 parts en poids sec d'un latex d'un copolymère styrene-acrylate reticulable et ayant une Tg d'environ 50°C, et 20 parts en poids sec du poly(alcool vinylique) utilisé à l'exemple 2.A sheet is produced as in Example 1 but it is impregnated with a composition containing 80 parts by dry weight of a latex of a cross-linkable styrene-acrylate copolymer and having a Tg of approximately 50 ° C., and 20 parts by dry weight of the poly (vinyl alcohol) used in Example 2.
L'extrait sec est réglé pour que la composition ait une viscosité BROOKFIELD mesurée avec un mobile à 100 tours/mn de 75 mPa.s .The dry extract is adjusted so that the composition has a BROOKFIELD viscosity measured with a mobile at 100 rpm of 75 mPa.s.
On teste la feuille ainsi imprégnée comme dans l'exemple 1. La quantité de formaldéhyde est inférieure à 0,15mg/(h.m2) .The sheet thus impregnated is tested as in Example 1. The amount of formaldehyde is less than 0.15 mg / (hm 2 ).
Son imprimabilité et son aptitude au vernissage sont d'un niveau aussi bon que celles de l'exemple 1.Its printability and its ability to varnish are of a level as good as that of Example 1.
Cependant le nombre de froissements est de 2, ce qui est faible.However, the number of creases is 2, which is low.
Remarque :Note :
Les résultats du test à l'arrachage sont bons dans tous les cas. The results of the grub test are good in all cases.

Claims

REVENDICATIONS
1. Feuille imprégnée pour revêtement décoratif caractérisée par le fait qu'elle est imprégnée d'une composition comportant en mélange un polymère reticulable ayant une température de transition vitreuse comprise entre -10 et 35°C, utilisé sous la forme d'une dispersion aqueuse stable, autre qu'un copolymère styrene-acrylate d•éthyle-acrylate de butyle, et un liant hydrosoluble.1. Impregnated sheet for decorative coating characterized in that it is impregnated with a composition comprising a mixture of a crosslinkable polymer having a glass transition temperature of between -10 and 35 ° C, used in the form of an aqueous dispersion stable, other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
2. Feuille selon la revendication 1, caractérisée par le fait que le liant hydrosoluble est choisi parmi les poly(alcool de vinyle) , la gélatine, les amidons, les dérivés de cellulose, les alginates et leurs mélanges.2. Sheet according to claim 1, characterized in that the water-soluble binder is chosen from poly (vinyl alcohol), gelatin, starches, cellulose derivatives, alginates and their mixtures.
3. Feuille selon l'une des revendications l ou 2, caractérisée par le fait que le polymère reticulable utilisé sous la forme d'une dispersion aqueuse stable est choisi parmi les copolymères de styrène-butadiène, les copolymères de styrène-butadiène carboxylés, les polymères de l'acétate de vinyle dont le poly(éthylène/acétate de vinyle) , les polymères acryliques et dérivés autre qu'un copolymère styrene-acrylate d'éthyle- acrylate de butyle, les polymères urethanes et leurs mélanges.3. Sheet according to one of claims l or 2, characterized in that the crosslinkable polymer used in the form of a stable aqueous dispersion is chosen from styrene-butadiene copolymers, carboxylated styrene-butadiene copolymers, vinyl acetate polymers including poly (ethylene / vinyl acetate), acrylic polymers and derivatives other than a styrene-ethyl acrylate-butyl acrylate copolymer, urethane polymers and mixtures thereof.
4. Feuille selon l'une des revendications 1 à 3, caractérisée par le fait qu'elle est imprégnée d'une composition comportant 95 à 50 parts en poids sec de polymère reticulable et 5 à 50 parts en poids sec de liant hydrosoluble, la somme des parts respectives étant égale à 100.4. Sheet according to one of claims 1 to 3, characterized in that it is impregnated with a composition comprising 95 to 50 parts by dry weight of crosslinkable polymer and 5 to 50 parts by dry weight of water-soluble binder, the sum of the respective shares being equal to 100.
5. Feuille selon les revendications 2 à 4, caractérisée par le fait que le liant hydrosoluble est un poly(alcool de vinyle) ayant un degré d'hydrolyse de 98-99 et une viscosité de 4 mPa.s [déterminée à 20°C selon la norme DIN 53015 pour une solution à5. Sheet according to claims 2 to 4, characterized in that the water-soluble binder is a poly (vinyl alcohol) having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s [determined at 20 ° C according to DIN 53015 for a solution to
4%] .4%].
6. Feuille selon la revendication 5, caractérisée par le fait qu'elle est imprégnée d'une composition comportant 70 à 90 parts en poids sec de poly(éthylène/acétate de vinyle) et 30 à 10 parts en poids sec du poly(alcool de vinyle) , la somme des parts respectives étant égale à 100.6. Sheet according to claim 5, characterized in that it is impregnated with a composition comprising 70 to 90 parts by dry weight of poly (ethylene / vinyl acetate) and 30 to 10 parts by dry weight of poly (vinyl alcohol), the sum of the respective parts being equal to 100.
7. Stratifié ou profilé décoratif caractérisé par le fait qu'il comporte comme feuille décorative, une feuille selon l'une des revendications l à 6.7. Laminate or decorative profile characterized in that it comprises as a decorative sheet, a sheet according to one of claims l to 6.
8. Composition d'imprégnation pour imprégner une feuille servant de base aux revêtements décoratifs, caractérisée par le fait qu'elle comporte en mélange un polymère reticulable, ayant une température de transition vitreuse comprise entre -10 et 35°C, en dispersion aqueuse stable, autre qu'un copolymère styrene- acrylate d'éthyle-acrylate de butyle, et un liant hydrosoluble.8. Impregnation composition for impregnating a sheet serving as a basis for decorative coatings, characterized in that it comprises, in mixture, a crosslinkable polymer, having a glass transition temperature of between -10 and 35 ° C, in stable aqueous dispersion , other than a styrene-ethyl acrylate-butyl acrylate copolymer, and a water-soluble binder.
9. Composition selon la revendication 8, caractérisée par le fait que le liant hydrosoluble est choisi parmi les poly(alcool de vinyle) , la gélatine, les amidons, les dérivés de cellulose, les alginates et leurs mélanges.9. Composition according to Claim 8, characterized in that the water-soluble binder is chosen from poly (vinyl alcohol), gelatin, starches, cellulose derivatives, alginates and their mixtures.
10. Composition selon l'une des revendications 8 à 9, caractérisée par le fait que le polymère reticulable en dispersion aqueuse stable est choisi parmi les copolymères de styrène-butadiène, les copolymères de styrène-butadiène carboxylés, les polymères de l'acétate de vinyle dont le poly(éthylène/acétate de vinyle) , les polymères acryliques et dérivés autre qu'un copolymère styrene-acrylate d1éthyle- acrylate de butyle, les polymères urethanes et leurs mélanges.10. Composition according to one of claims 8 to 9, characterized in that the crosslinkable polymer in stable aqueous dispersion is chosen from styrene-butadiene copolymers, styrene-butadiene carboxylated copolymers, polymers of acetate of vinyl including poly (ethylene / vinyl acetate), acrylic polymers and derivatives, other than a styrene-acrylate copolymer 1 ethyl butyl acrylate, urethane polymers and their mixtures.
11. Composition selon l'une des revendications 8 à 10, caractérisée par le fait qu'elle comporte 95 à 50 parts en poids sec de polymère reticulable et 5 à 50 parts en poids sec de liant hydrosoluble, la somme des parts respectives étant égale à 100.11. Composition according to one of claims 8 to 10, characterized in that it comprises 95 to 50 parts by dry weight of crosslinkable polymer and 5 to 50 parts by dry weight of water-soluble binder, the sum of the respective parts being equal 100.
12. Composition selon la revendication 9, caractérisée par le fait que le liant hydrosoluble est un poly(alcool de vinyle) ayant un degré d'hydrolyse de 98-99 et une viscosité de 4 mPa.s [déterminée à 20°C selon la norme DIN 53015 pour une solution à12. Composition according to claim 9, characterized in that the water-soluble binder is a poly (vinyl alcohol) having a degree of hydrolysis of 98-99 and a viscosity of 4 mPa.s [determined at 20 ° C according to the DIN 53015 standard for a solution to
4%] . 4%].
13. Composition selon la revendication 12, caractérisée par le fait qu'elle comporte 70 à 90 parts en poids sec de poly(éthylène/acétate de vinyle) et 30 à 10 parts en poids sec du poly(alcool de vinyle) , la somme des parts respectives étant égale à 100.13. Composition according to claim 12, characterized in that it comprises 70 to 90 parts by dry weight of poly (ethylene / vinyl acetate) and 30 to 10 parts by dry weight of poly (vinyl alcohol), the sum respective shares being equal to 100.
14. Composition selon l'une des revendications 8 à 13, caractérisée par le fait qu'elle a une viscosité BROOKFIELD, mesurée à 100 tours/mn, inférieure à 200 mPa.s . 14. Composition according to one of claims 8 to 13, characterized in that it has a BROOKFIELD viscosity, measured at 100 revolutions / min, less than 200 mPa.s.
EP94902840A 1993-12-21 1993-12-21 Impregnated paper sheet as decorative overlay Expired - Lifetime EP0739435B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES94902840T ES2125433T3 (en) 1993-12-21 1993-12-21 PAPER SHEET IMPREGNATED AS DECORATIVE COATING.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR1993/001275 WO1995017551A1 (en) 1993-12-21 1993-12-21 Impregnated sheet used as a basis for a decorative coating

Publications (2)

Publication Number Publication Date
EP0739435A1 true EP0739435A1 (en) 1996-10-30
EP0739435B1 EP0739435B1 (en) 1998-10-28

Family

ID=9443761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94902840A Expired - Lifetime EP0739435B1 (en) 1993-12-21 1993-12-21 Impregnated paper sheet as decorative overlay

Country Status (9)

Country Link
US (1) US5885719A (en)
EP (1) EP0739435B1 (en)
AT (1) ATE172766T1 (en)
CA (1) CA2179541C (en)
DE (1) DE69321853T2 (en)
ES (1) ES2125433T3 (en)
HU (1) HU220243B (en)
PL (1) PL173782B1 (en)
WO (1) WO1995017551A1 (en)

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WO2009000769A1 (en) 2007-06-28 2008-12-31 Technocell Dekor Gmbh & Co. Kg Pre-impregnated product
DE102011105676A1 (en) 2011-06-22 2012-12-27 Schoeller Technocell Gmbh & Co. Kg prepreg
EP2222919B2 (en) † 2007-12-21 2016-01-13 Schoeller Technocell GmbH & Co. KG Base paper for decorative coating materials
EP3754109A1 (en) 2019-06-18 2020-12-23 Schoeller Technocell GmbH & Co. KG Prepreg with improved planarity

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WO2001046283A1 (en) 1999-12-21 2001-06-28 Omnova Solutions Inc. Polyvinyl alcohol copolymer composition
DE10134302C1 (en) 2001-07-14 2002-12-12 Technocell Dekor Gmbh & Co Kg Pre-impregnate obtained by impregnation of crude paper with a thermally hardenable formaldehyde-free resin useful in the production of decorative impregnates or coatings, and surface treatment of printed and unprinted papers
DE10307966C5 (en) † 2003-02-24 2009-05-28 AHLSTROM OSNABRÜCK GmbH Preimpregnate and process for its preparation
DE10334008A1 (en) * 2003-07-25 2005-02-24 Bausch Gmbh Process for coating carrier materials with different degrees of gloss and subsequently produced carrier material
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AU2008337508B2 (en) 2007-12-17 2012-03-15 Technocell Dekor Gmbh & Co. Kg Compressible decorative paper impregnating agent which can be printed by the inkjet method
DE102013114420A1 (en) 2012-12-23 2014-06-26 Michael Jokiel Impregnated paper comprises base paper which is impregnated on one side with water-based impregnating solution comprising e.g. aqueous dispersion of styrene-ethyl-butyl acrylate copolymer and aqueous dispersion of styrene-acrylate copolymer
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BR112020017653B1 (en) 2018-03-01 2023-12-26 Arclin Usa Llc CONSTRUCTION PRODUCT
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WO2009000769A1 (en) 2007-06-28 2008-12-31 Technocell Dekor Gmbh & Co. Kg Pre-impregnated product
DE102007030102A1 (en) 2007-06-28 2009-01-02 Technocell Dekor Gmbh & Co. Kg prepreg
US8349464B2 (en) 2007-06-28 2013-01-08 Schoeller Technocell Gmbh & Co. Kg Pre-impregnated product
EP2222919B2 (en) † 2007-12-21 2016-01-13 Schoeller Technocell GmbH & Co. KG Base paper for decorative coating materials
DE102011105676A1 (en) 2011-06-22 2012-12-27 Schoeller Technocell Gmbh & Co. Kg prepreg
DE102011105676B4 (en) 2011-06-22 2018-05-09 Schoeller Technocell Gmbh & Co. Kg Prepreg and decorative paper or decorative coating material therefrom
EP3754109A1 (en) 2019-06-18 2020-12-23 Schoeller Technocell GmbH & Co. KG Prepreg with improved planarity

Also Published As

Publication number Publication date
DE69321853T2 (en) 1999-05-27
DE69321853D1 (en) 1998-12-03
CA2179541C (en) 2001-07-10
HU9601718D0 (en) 1996-08-28
ATE172766T1 (en) 1998-11-15
CA2179541A1 (en) 1995-06-29
WO1995017551A1 (en) 1995-06-29
ES2125433T3 (en) 1999-03-01
PL315115A1 (en) 1996-10-14
PL173782B1 (en) 1998-04-30
US5885719A (en) 1999-03-23
HU220243B (en) 2001-11-28
EP0739435B1 (en) 1998-10-28
HUT77902A (en) 1998-09-28

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