Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/18—Paper- or board-based structures for surface covering
  • D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
• • 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
  • D21H17/47—Condensation polymers of aldehydes or ketones
  • D21H17/48—Condensation polymers of aldehydes or ketones with phenols
• • 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
  • D21H17/47—Condensation polymers of aldehydes or ketones
  • D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
  • D21H17/51—Triazines, e.g. melamine
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
  • D21H21/16—Sizing or water-repelling agents
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
  • D21H25/04—Physical treatment, e.g. heating, irradiating
  • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/18—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
• • 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
  • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
• • 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
  • D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
  • D21H27/28—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures treated to obtain specific resistance properties, e.g. against wear or weather
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/30—Multi-ply

Definitions

• the present invention relates to a laminate based on pressed under the action of heat and pressure into a laminate, with melamine resin, phenolic resin and / or melamine-phenolic resin coated or impregnated paper or fabric webs.
• Laminates or laminates are composites, such as hard paper, hard tissue, compressed wood, which are produced by layered structure of coated or impregnated with synthetic resins paper or fabric webs and by applying pressure and heat as films, plates, forums, etc.
• the present invention relates only to laminates based on melamine resin, phenolic resin and / or melamine-phenolic resin. Such laminates are used in particular for the production of decorative surfaces, in particular in the furniture industry, use.
• the present invention particularly relates to this field of application.
• the sweat of man is about 99% water. The remainder consists of electrolytes, lactate, amino acids and ureas.
• electrolytes a substance that influences the corresponding fingerprints on the surfaces.
• lactate a substance that influences the corresponding fingerprints on the surfaces.
• amino acids a substance that influences the corresponding fingerprints on the surfaces.
• the above-mentioned problem therefore essentially relates to the attachment and / or adhesion of water droplets to or on such surfaces.
• the ability to deposit such drops of water is due to the surface tension of the respective solid. The lower the surface tension, the lower the tendency to deposit corresponding drops of water.
• the present invention is therefore an object of the invention to provide a laminate of the type described above with particularly good Fingerprinteigenschaften available, which can be particularly easily and inexpensively. Furthermore, according to the invention, a method for the production of such a laminate is to be provided.
• a laminate of the type indicated which has a surface layer in which the corresponding reactive resin is crosslinked with a substance that reduces the surface tension of the finished laminate.
• the "fingerprint protection” is integrated into the laminate. This is achieved by chemically bonding a substance which reduces the surface tension of the finished laminate into the resin layer forming the surface of the laminate.
• the condensation reaction responsible for the curing of the melamine resin, phenolic resin and / or melamine-phenolic resin therefore takes place in the presence of the surface tension of the final laminate reducing agent which is reactive with the corresponding resin.
• the introduced surface tension reducing substance is therefore permanently bonded to the resin of the laminate via a chemical bond, since it participates via chemically reactive groups in the molecule in the curing process or condensation process of the resin.
• the incorporation of this substance achieves a considerable reduction in the surface energy of the laminate without impairing its properties, such as scratch resistance, chemical resistance, etc.
• the addition or Adherence of water droplets to the correspondingly modified surface is reduced compared to conventional materials, so that good protection against fingerprints is achieved. Since the material can be incorporated into the laminate during the normal production process and no additional work steps are required, a simple and cost-effective production process is achieved.
• the incorporation of the substance improves the oleophobic properties of the laminate so that the adhesion of fats or oils is also reduced.
• the cleaning properties (easy-clean properties) are improved.
• the surface layer is formed by at least partial diffusion of a layer of the reactive resin containing the surface tension reducing substance.
• a surface tension reducing or containing layer is applied to the uppermost layer of the uncured laminate consisting of a corresponding reactive resin such as melamine resin. The applied layer then diffuses or diffuses into the layer of reactive resin, whereby the surface tension reducing agent then participates in the condensation reaction taking place under the action of pressure and heat to form a correspondingly modified surface layer which is improved by " Fingerprints features ".
• fluorine-modified substances or silicone-modified substances are used as for the surface tension reducing substances which must be reactive with respect to a resin of the laminate.
• Fluorosiloxanes or silicone-modified polysiloxanes which are added to the resin which forms the uppermost layer of the uncured laminate, in particular melamine resin, and are incorporated into the network of the cured resin via the subsequent condensation reaction, are particularly preferred.
• Such a modified with a fluorosiloxane resin, especially melamine resin, melamine-phenolic resin, but also phenolic resin leads to a drastic reduction in the surface tension of the finished hardened laminate, so that hardly any drops of water are deposited, but also the attachment of fat / oil stains is reduced. The surface thus achieved is therefore abhesive against human sweat.
• a process is also provided for producing a laminate based on paper or fabric webs coated or impregnated with melamine resin, phenolic resin and / or melamine-phenolic resin, in which the coated or impregnated paper or fabric webs are pressed at elevated temperature to form a laminate become.
• such a method is to be provided, with which a laminate having particularly good fingerprint properties can be produced in a particularly simple and cost-effective manner.
• the method according to the invention provides for three variants.
• the surface tension reducing agent is added to or mixed with the corresponding resin before the resin is used for painting or soaking.
• the second variant of the surface tension reducing substance is applied directly to the surface of the uncured laminate, while in the third variant, the substance is applied indirectly to the surface, namely via a corresponding transfer process.
• the variant in which the substance is added to the resin before brushing or soaking is generally less preferred, because with this variant no particularly thin surface layer can be produced in a targeted manner.
• the fabric in which the fabric is applied directly to the surface of the uncured laminate, it is preferably placed in the uppermost resin layer of the laminate for diffusion, so as to ensure that the applied, the fabric containing or from this existing layer fully participates in the condensation reaction of the resin, so that a real chemical integration takes place.
• the substance is applied to a substrate structuring the surface of the laminate and transferred by means of this substrate to the uncured laminate.
• a substrate may, for example, be a suitable metal foil (aluminum foil), plastic foil or metal foil with a paper layer on the back for transferring the paper structure.
• the surface tension reducing agent may be used as the release agent when the transfer method is carried out, or the surface tension reducing agent may be used in addition to a release agent when carrying out the transfer method.
• the surface tension reducing agent it is preferable to use a fluorosilane or a fluorosilane-containing substance. Also suitable is a silicone or a silicone-containing substance.
• the curing of the laminate is preferably carried out with the parameters customary for such a condensation reaction performed in terms of temperature and heat.
• the substance is incorporated into the network or matrix via the reactive groups of the resin, so that a modified surface layer is formed which has the desired properties (hydrophobic and preferably also oleophobic).
• This modified surface layer is further characterized by substantially maintaining surface properties of the unmodified laminate.
• improved surface properties achieved according to the invention include improved cleaning properties.
• the substrate provided with the layer containing or consisting of the surface tension reducing substance is placed with the layer down on the top resin-impregnated paper of the laminate and then pressed together with the laminate becomes. After curing, the substrate is peeled off the laminate surface.
• Dynasilan 8815 (a modified fluoroalkylsiloxane) was mixed with water until a 5% solution was present. This solution was on the matte side of a Aluminum foil applied so that a coating weight of 10 g / m 2 wet resulted. Subsequently, the coated aluminum foil was dried at 120 ° C for 1 minute.
• a package of single papers composed of five papers impregnated with phenolic resin and a melamine resin paper assembled for the production of common furniture surfaces was placed between two metal plates. The coated side of the aluminum foil was placed on top of the melamine resin-soaked paper.
• the material package was compressed in an HPL press under a pressure of 60 bar with the following cycle: heating from 50 ° C to 140 ° C, 20 min, residence at 140 ° C, 5 min, cooling to 50 ° C, 20 min.
• the aluminum foil was stripped from the melamine surface and the surface tension was measured in comparison to a standard melamine resin surface.
• the untreated melamine resin surface had a surface tension of> 44 mN / m.
• the treated melamine resin surface had a surface tension of ⁇ 30 mN / m.
• a silicone modified polysiloxane with hydroxyl functionality especially the commercial product Silclean, was dissolved at 5% in isopropanol and coated on the matte side of an aluminum foil with a thickness of 40 microns so that a wet application of about 10 g / m 2 resulted.
• the aluminum foil was processed as in Example 1, with the difference that the pressing conditions were changed as follows: placing the stack in the hot press at 170 ° C, residence time at 170 ° C for 5 min at a pressure of 25 bar with subsequent direct removal , After the cooling process of the sample, the surface tension of the melamine resin surface was determined. In this case, a value of 33 mN / m was obtained.
• a polyester film of thickness 50 .mu.m was provided on one side with a radiation-curing paint such that a coating weight of about 15 g / m 2 resulted.
• a radiation-curing paint such that a coating weight of about 15 g / m 2 resulted.
• the surface of the coating was dulled either via a matte roll or with a precure via an excimer lamp and finally radiation cured.
• the result was a matte surface, which was then coated with an OH-functional substance according to Example 1 and 2 and was further processed by the described method for producing phenol-melamine resin products.
• the polyester film was peeled off the cured melamine resin surface. In addition to a textured melamine resin surface, this resulted in a surface energy on the matt melamine resin surface of ⁇ 32 mN / m.

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

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Citations (3)

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• 2014
  • 2014-02-20 DE DE102014002483.0A patent/DE102014002483A1/de not_active Withdrawn
• 2015
  • 2015-01-19 EP EP15000128.7A patent/EP2910680A1/fr not_active Withdrawn

Patent Citations (3)

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