EP3138958A1 - Materiau de support fibreux destine a la fabrication d'un papier brut de revetement poreux ou d'un pre-impregne et son procede de fabrication - Google Patents

Materiau de support fibreux destine a la fabrication d'un papier brut de revetement poreux ou d'un pre-impregne et son procede de fabrication Download PDF

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Publication number
EP3138958A1
EP3138958A1 EP15183940.4A EP15183940A EP3138958A1 EP 3138958 A1 EP3138958 A1 EP 3138958A1 EP 15183940 A EP15183940 A EP 15183940A EP 3138958 A1 EP3138958 A1 EP 3138958A1
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EP
European Patent Office
Prior art keywords
nfc
carrier material
cellulose
fibrous carrier
paper
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.)
Ceased
Application number
EP15183940.4A
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German (de)
English (en)
Inventor
Erfindernennung liegt noch nicht vor Die
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.)
Schattdecor AG
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Schattdecor AG
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Filing date
Publication date
Application filed by Schattdecor AG filed Critical Schattdecor AG
Priority to EP15183940.4A priority Critical patent/EP3138958A1/fr
Publication of EP3138958A1 publication Critical patent/EP3138958A1/fr
Ceased 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D21H11/18—Highly hydrated, swollen or fibrillatable fibres
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H27/20—Flexible structures being applied by the user, e.g. wallpaper
    • 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
    • D21H27/30—Multi-ply

Definitions

  • the present invention relates to a fibrous carrier material according to the preamble of claim 1 and to a method for its production. Furthermore, the invention relates to a coating base paper or prepreg formed from the novel carrier material.
  • the products according to the invention are intended for the production of coating materials for furniture surfaces and furniture foils, but also for walls, floors and ceilings.
  • Coating base papers are produced in all colors / saturations / brightnesses, which can be measured from the entire color spectrum.
  • Coating base papers sometimes also referred to as decorative base papers, are highly technical special papers which are printed with aqueous or solvent-based color systems or are printed unprinted and in monochrome.
  • the further processing is essentially subdivided into the processes of impregnation, painting, pressing on wood-based materials or lamination on wood-based materials or other plate-like materials.
  • Wood-based materials are chipboard, fiberboard, medium-density fibreboard (MDF) and high-density fibreboard.
  • plates can also be coated or laminated, which are made of a variety of materials in particular mineral materials, plastics or metals can be produced.
  • Coating base papers must be produced in all the colors of the color spectrum that can be perceived by the human eye, including the highest brightness (white) and the highest darkness level (black).
  • organic and inorganic pigments of different particle size are used in different mixing and concentration. Fillers are also used to meet and meet all physical conditions and requirements.
  • titanium dioxide titanium dioxide
  • TiO 2 titanium dioxide
  • titanium dioxide is added to the fibrous paper in a wet end process (see, for example WO 2013/109441 A1 ).
  • Coating base paper as a fibrous carrier material is the most economical, flexible and functional solution for displaying designed and shaped surfaces for a wide variety of applications such as furniture for living and sleeping areas, kitchens, offices, bathrooms, floors, interiors for large objects such as airports, hotels, office buildings, buildings of the public interest such as museums, galleries (see for example WO 2013/109441 A1 ).
  • Coating raw paper requires a very high, possibly up to 100% opacity.
  • the covering capacity against the ground, so the Color of the carrier material must be ensured without loss of color impression.
  • Crucial for this are the content (amount) and the distribution of pigments and fillers in the paper body. The limit amount is dictated by the requirement for strength of the paper.
  • the limit amount can be increased in a conventional manner by increasing the basis weight of the paper.
  • the basis weight of the paper is high enough, the desired 100% opacity can be approached.
  • the current state of the art places economic limits on the sensible use of pigments and fillers.
  • the most commonly used pigments white (titanium dioxide) and colored (iron oxides), represent a high value and are subject to immense, cyclical price fluctuations. Therefore, maximum yield is very important. This, in turn, means that the pigments / fillers in the paper body must have maximum particle distribution to achieve the best possible opacity and hiding power. Until today it has not been possible to reach this standard. The pigments / fillers are present in the paper body as agglomerates. The light-scattering layers overlap and reduce the opacity effects and form a different color perception.
  • an object of the present invention is to provide a fibrous carrier material, in particular a coating base paper, which is characterized by high quality, in particular by high opacity, less demand distinguished on pigments and good mechanical stability.
  • a further object of the invention is to specify a method for producing the carrier material according to the invention.
  • a coating base paper or a prepreg having improved properties is provided.
  • the fibrous carrier material according to the invention comprises, in a known manner, a two-dimensional structure of cellulose fibers which additionally contains at least one pigment species and optionally further paper-like additives. Furthermore, the cellulose fibers contain a proportion of 1 to 20 wt .-% of nanofibrillated cellulose, which is to be understood here as the percentage of the total weight of all cellulose fibers. As will be explained in more detail below, in the present context the term “nanofibrillated cellulose”, also abbreviated here as "NFC”, comprises cellulose fibers with a diameter of approximately 3 nm to approximately 200 nm and a length of at least 500 nm and an aspect ratio ( Length: diameter) of at least 100 to understand.
  • NFC nanofibrillated cellulose
  • the NFC fibers have a diameter of 10 to 100 nm, an average of 50 nm and a length of at least a few microns, and the aspect ratio may also be 1,000 or more.
  • the NFC content is 5 to 10 wt .-%.
  • NFC NFC-derived pigment content
  • a given pigment content results in a significantly higher opacity or that a given opacity can be achieved with a lower pigment content.
  • a directly apparent advantage follows from the saving of pigment material, with concomitant cost reduction, but also with reduced dust formation during processing.
  • chemicals can advantageously be dispensed with or reduced in their required amount, which are currently used to improve pigment retention.
  • Another, very significant advantage of the lower pigment content at a given Opacity lies in a further improvement of the structural integrity, in particular the tear strength of the fibrous carrier structure, ie the coating base paper. This applies in all directions within the support structure and both in the dry and in the wet state.
  • NFC Cellulose nanofibers
  • NFC is generally obtained by a mechanical comminution process of wood and other vegetable fibers; first descriptions go to Herrick et al. [4] and Turback et al. [5] returned in 1983.
  • MFC microfibrillated cellulose
  • CNF cellulose nanofibers
  • NFC nanofibrillated cellulose
  • cellulose nano- or microfibrils are commonly used.
  • cellulose nanofibers In contrast to the straightforward “cellulose whiskers”, which are also referred to as “cellulose nanocrystals” and have a rod-like shape with a length of usually 100 to 500 nm (depending on the cellulose source, there are also up to 1 micron long crystals) , cellulose nanofibers are long and flexible.
  • the resulting NFC usually contains crystalline and amorphous domains and has a network structure due to strong hydrogen bonds [7, 8, 9].
  • customary paper additives are meant in particular fillers.
  • the pigments and fillers contained in the novel support material are preferably selected from the group of metal oxides, oxides and / or mixed oxides of a semi-metal / semiconductor or mixtures thereof.
  • the pigments / fillers may be selected from, but not limited to, silicon, magnesium, calcium, aluminum, zinc, chromium, iron, copper, tin, lead or mixtures thereof.
  • Preferred pigments / fillers are silicic acids, aluminum oxides, iron oxides, magnesium silicate, magnesium carbonate, titanium dioxide, tin oxide, aluminum silicate, calcium carbonate, talcum, clay, silicon dioxide, inorganic substances such as diatomite, organic substances such as melamine-formaldehyde resins, urea-formaldehyde resins, acrylates, polyvinyl alcohol, modified polyvinyl alcohol, polyvinyl acrylates, polyacrylates, synthetic binders, natural origin binders such as starch, modified starch, carboxymethyl cellulose or mixtures thereof.
  • a particularly preferred pigment species for forming a white coloration is titanium dioxide (claim 3).
  • Another pigment species used for some applications is the iron oxide (claim 4).
  • the NFC content is 5 to 10% by weight.
  • the NFC used for the above process should have a specific surface area (SSA) of at least 125 m 2 / g, in particular of at least 175 m 2 / g, preferably at least 225 m 2 / g (claim 7).
  • SSA specific surface area
  • the process according to the invention uses a papermaking process which is suitable and optimized for the production of coating base paper.
  • Such methods are known in principle.
  • the process will be modified such that the cellulose-containing material is added either directly before the formation of an aqueous suspension or subsequently in the proportion of 1 to 20% by weight of NFC. Again, this percentage refers to the total weight of all cellulosic fibers.
  • a porous coating base paper is provided, which is characterized by an increased opacity at a given pigment content or by a lower pigment requirement for a given opacity and at the same time with commercially available methods such as WO 2013/109441 A1 described further processed.
  • a pre-impregnate wherein the inventive carrier material is impregnated with a suitable synthetic resin dispersion.
  • Preimpregnates are prepared in a manner known per se by impregnating a fibrous carrier material with an impregnating resin solution (see, for example, US Pat EP 0648248 B1 ). This impregnation step already takes place in the paper machine. As a result, the pre-impregnates can still be provided with a print motif.
  • the novel prepregs are distinguished by the advantages already mentioned in connection with the coating paper according to the invention.
  • HPL high pressure laminates
  • low pressure laminates This could be used indoors for floors, walls and ceilings and all furniture surfaces. It is understood that depending on the application, the surface layer still provided with an additional protective layer (overlay) or painted.
  • the specific surface area (SSA) in m 2 / g of NFC-containing cellulose increases linearly as a function of the weight fraction of NFC. While it is less than 100 m 2 / g in conventional cellulose without NFC addition, it has more than doubled in NFC; please refer: Josset, S. et al. Energy consumption of the nanofibrillation of bleached pulp. Nordic Pulp & Paper Research Journal 29, 167-175 (2014 ).
  • Bleached wood fiber pulp was ground by a standard method to a Schopper-Riegler value of 35 SR °.
  • a first 1% by weight suspension of this pulp was prepared to prepare standard paper blanks.
  • a second 1 wt% pulp suspension with 5 wt% NFC (based on total pulp amount) was prepared to make modified paper blanks.
  • the NFC from softwood fibers (ECF, Stendal, D) was produced according to the process described in the following reference: Josset, S. et al. Energy consumption of the nanofibrillation of bleached pulp. Nordic Pulp & Paper Research Journal 29, 167-175 (2014 ).
  • the remaining material was pressed on a black background with aqueous melamine resin impregnated overlay paper to a high gloss composite (60 bar, 2 min at 150 ° C, re-cooling: 5 min, to about 45 ° - 50C °).
  • the average light reflection of these compressions was determined by means of a spectrophotometer (Konika Minolta, CM-2500D) between 360 and 740 nm.
  • the addition of 5 wt% NFC causes a significant increase in light reflectance.
  • the light reflection increases from about 49% (without NFC) to about 54% (with NFC).
  • Noteworthy in particular is the behavior in the flattening region of the curves at higher TiO 2 contents.
  • conventional paper requires a TiO 2 content of about 22% by weight, which in the case of an addition of 5% by weight NFC to about 17% by weight. lower. This corresponds to over 22% savings in TiO 2 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
EP15183940.4A 2015-09-04 2015-09-04 Materiau de support fibreux destine a la fabrication d'un papier brut de revetement poreux ou d'un pre-impregne et son procede de fabrication Ceased EP3138958A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15183940.4A EP3138958A1 (fr) 2015-09-04 2015-09-04 Materiau de support fibreux destine a la fabrication d'un papier brut de revetement poreux ou d'un pre-impregne et son procede de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15183940.4A EP3138958A1 (fr) 2015-09-04 2015-09-04 Materiau de support fibreux destine a la fabrication d'un papier brut de revetement poreux ou d'un pre-impregne et son procede de fabrication

Publications (1)

Publication Number Publication Date
EP3138958A1 true EP3138958A1 (fr) 2017-03-08

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EP15183940.4A Ceased EP3138958A1 (fr) 2015-09-04 2015-09-04 Materiau de support fibreux destine a la fabrication d'un papier brut de revetement poreux ou d'un pre-impregne et son procede de fabrication

Country Status (1)

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EP (1) EP3138958A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648248B1 (fr) 1992-06-22 1998-11-25 ARJO-WIGGINS DEUTSCHLAND GmbH Composition aqueuse d'impregnation
EP1936032A1 (fr) * 2006-12-18 2008-06-25 Akzo Nobel N.V. Procédé de production d'un produit en papier
WO2013109441A1 (fr) 2012-01-16 2013-07-25 E. I. Du Pont De Nemours And Company Dispersions créées à partir de particules inorganiques traitées pour la fabrication de papier de décoration ayant des performances optiques améliorées

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648248B1 (fr) 1992-06-22 1998-11-25 ARJO-WIGGINS DEUTSCHLAND GmbH Composition aqueuse d'impregnation
EP1936032A1 (fr) * 2006-12-18 2008-06-25 Akzo Nobel N.V. Procédé de production d'un produit en papier
WO2013109441A1 (fr) 2012-01-16 2013-07-25 E. I. Du Pont De Nemours And Company Dispersions créées à partir de particules inorganiques traitées pour la fabrication de papier de décoration ayant des performances optiques améliorées

Non-Patent Citations (10)

* Cited by examiner, † Cited by third party
Title
ANDRESEN, M.; JOHANSSON, L.S.; TANEM, B.S.; STENIUS, P.: "Properties and characterization of hydrophobized microfibrillated cellulose", CELLULOSE, vol. 13, 2006, pages 665 - 677
BARDET, R.; BELGACEM, M.N.; BRAS, J.: "Different strategies for obtaining high opacity films of MFC with Ti02 pigment", CELLULOSE, vol. 20, 2013, pages 3025 - 3037
HERRICK, F.W.; CASEBIER, R.L.; HAMILTON, J.K.; SANDBERG, K.R.: "Microfibrillated cellulose: Morphology and accessibility", J. APPL. POLYM. SCI. APPL. POLYM. SYMP., vol. 37, 1983, pages 797 - 813
ISTEK, A; AYDEMIR, D.; ASKU, S.: "The effect of decor paper and resin type on the physical, mechanical, and surface quality properties of particleboards coated with impregnated decor papers", BIORESOURCES, vol. 5, 2010, pages 1074 - 1083
IWAMOTO, S.; KAI, W.; ISOGAI, A; IWATA, T.: "Elastic modulus of single cellulose microfibrils from tunicate measured by atomic force microscopy", BIOMACROMOLECULES, vol. 10, 2009, pages 2571 - 2576
JOSSET, S. ET AL.: "Energy consumption of the nanofibrillation of bleached pulp, wheat straw and recycled newspaper through a grinding process", NORDIC PULP & PAPER RESEARCH JOURNAL, vol. 29, 2014, pages 167 - 175
LU, J.; ASKELAND, P.; DRZAL, L.T.: "Surface modification of microfibrillated cellulose for epoxy composite applications", POLYMER, vol. 49, 2008, pages 1285 - 1298
NAKAGAITO, A.N; YANO, H.: "Novel high-strength biocomposites based on microfibrillated cellulose having nano-order-unit web-like network structure", APPL. PHYS. A-MAT. SCI. PROCESS., vol. 80, 2005, pages 155 - 159
TURBAK, AF.; SNYDER, F.W.; SANDBERG, K.R.: "Microfibrillated cellulose, a new cellulose product: Properties, uses, and commercial potential", J. APPL. POLYM. SCI. APPL. POLYM. SYMP, vol. 37, 1983, pages 815 - 827
ZIMMERMANN, T.; PÖHLER, E.; GEIGER, T.: "Cellulose fibrils for polymer reinforcement.", ADV. ENG. MAT, vol. 6, 2004, pages 754 - 761

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