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
  • D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
  • D21H17/73—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of inorganic material
• • 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
  • D21H11/20—Chemically or biochemically modified fibres
  • D21H11/22—Chemically or biochemically modified fibres cationised
• • 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
  • D21H17/675—Oxides, hydroxides or carbonates
• • 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
  • D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
  • D21H21/52—Additives of definite length or shape

Definitions

• the invention relates to a decorative base paper, a Pigment mixture of titanium dioxide and talcum contains as well decorative coating materials obtained therefrom.
• Decorative coating materials are preferably for Surface coating in furniture manufacturing and in the Interior fitting used.
• Under decorative film is understood a resin impregnated or resin impregnated and surface treated, printed or unprinted Paper web.
• Decorative foils are provided with a carrier plate glued or glued.
• Laminates High Pressure Laminates
• the structure of these laminates consists in general from a highest surface resistance generating transparent overlay sheet (overlay), a resin-impregnated decorative paper and one or more phenolbehechen kraft papers.
• overlay transparent overlay sheet
• resin-impregnated decorative paper one or more phenolbeh GmbHen kraft papers.
• hardboard and chipboard and plywood used.
• Laminates (Low Pressure Laminates) are treated with synthetic resin soaked decorative paper directly with a base, For example, a chipboard, using a compressed low pressure.
• DE 197 28 796 A1 relates to a base paper for the Production of decorative surfaces with a share of at least 80% by weight of hardwood pulp on Total paper pulp, 2 to 4 wt% mineral Filler and 3.7 to 4.2 wt.% Starch.
• the mineral Filler can be titanium dioxide.
• DE 199 12 149 A1 concerns a decorative base paper with improved Dry strength, its pulp a Pulp mixture of a non-modified and a contains cationic-modified pulp.
• the amount of the filler, for example titanium dioxide, in this Decorative paper can be up to 55% by weight.
• Decorative base papers generally consist of highly white Sulphate pulps, mainly of hardwood pulp, to to 45 wt.% Pigments and fillers, based on the Weight of the base paper, as well as wet strength agent, Retention aids and fixatives.
• decorative base paper differ from usual papers by the very much higher filler content and the absence of a Paper with standard sizing or surface sizing with the known sizing agents such as alkylketene dimers.
• Opacity is one of the most important properties of Decorative base. This characterizes the opacity opposite the pad.
• a high opacity of the decorative base paper is due to the Addition of white pigments achieved.
• white pigment becomes usually used titanium dioxide. This pigment ensures high opacity and good brightness and white of the decorative base paper.
• the disadvantage, however, is the high price of titanium dioxide.
• the object underlying the invention is to a low-cost decorative paper with a high opacity at the same time reduced titanium dioxide content provide.
• the talc used in the invention has a very close Grain size distribution with a D50 of less than 3 ⁇ m. This means that 50 wt.% Of talcum particles a Have diameters of less than about 3 microns. Especially talc with a particle size distribution D50 is preferred less than 2 ⁇ m.
• the specific surface area of the talc used according to the invention is greater than about 30,000 m 2 / kg, and in a particularly preferred embodiment greater than about 40,000 m 2 / kg.
• the specific surface area of conventional talcum types is in the range from 8,000 to 16,000 m 2 / kg.
• the specific surface was determined according to DIN 66126.
• the proportion of talc in the pigment mixture is preferably at 0.1 to 25 wt.%, Based on the Total pigment content.
• the pigment mixture of the invention Decorative base paper contained titanium dioxide can be Titanium dioxide commonly used in decorative papers be. Such titanium dioxides are commercially available and can be used in rutile or anatase type. Such Rutile-type titanium dioxides are particularly preferred.
• fillers such as zinc sulfide, Calcium carbonate, kaolin or mixtures thereof used become.
• the proportion of the filler in the decorative base paper can be up to 55% by weight, in particular 11 to 50% by weight or 20 to 45% by weight, based on the weight of the paper.
• the basis weight of the decorative base papers according to the invention can be in the range of 30 to 300 g / m 2 and will usually be 40 to 200 g / m 2 . The basis weights are chosen depending on the particular uses.
• Decorative base papers can be softwood pulps (long fiber pulps) or hardwood pulps (short fiber pulps) be used.
• Cotton fibers or mixtures of the aforementioned Pulp types can be used.
• a mixture of is preferred Softwood / Hardwood pulps in the ratio of 10:90 to 90:10 or for example mixtures of softwood / hardwood pulps in the ratio 30:70 to 70:30.
• the Pulp may have a freeness of 20 ° to 60 ° SR after Schopper-Riegler have.
• the pulp mixture contains a proportion cationically modified pulp fibers of at least 5% by weight, based on the weight of the pulp mixture, contains. Particularly advantageous is a share from 10 to 50% by weight, in particular 10 to 20% by weight, of cationically modified pulp in the pulp mixture proved.
• Cationically modified pulps are for example from THE PAPER, Issue 12 (1980) p.575-579.
• the in the pulp cationically modified Pulp has an effective cationic charge of 20 to 300 mmol / kg pulp, determined according to the internal Method No. 4 of the TU Darmstadt.
• an effective cationic charge is one Charge density to be understood with the charge density of un-cationized pulp.
• the Density of pulp depends on the amount of pulp to be used cationic agent.
• the amount of cationizing agent may be 0.005 to 200 g / 1 kg Pulp amount.
• the cationic modification of the pulp fibers can by reaction of the fibers with epichlorohydrin resin and a tertiary amine or by reaction with quaternary ammonium chlorides, such as Chlorohydroxypropyltrimethyl-ammonium chloride or Glycidyltrimethyl ammonium chloride.
• Pulp fibers used by a Addition reaction of quaternary, glycidylfunktionelle Group containing ammonium compounds with Hydroxyl groups of the cellulose cationically modified are.
• the decorative base paper of the invention may be wet strength agents such as polyamide / polyamine-epichlorohydrin resin, others Polyamine derivatives or polyamide derivatives, cationic Polyacrylates, modified melamine-formaldehyde resin or cationized starches. These will be the Pulp suspension added. Likewise, the addition of Retention aids and other substances such as organic and inorganic colored pigments, dyes, optical brightener and dispersant possible.
• the decorative base papers according to the invention can on a Fourdrinier paper machine or a Yankee paper machine getting produced. This can do that Pulp mixture at a consistency of 2 to 4 wt.% are ground to a freeness of 30 to 45 ° SR.
• a mixing tank are fillers, such as titanium dioxide and talc, and wet strength agent and added with the Pulp mixture well mixed.
• the thus obtained Thick material is up to a consistency of about 1 wt.% diluted and, if necessary, further excipients such as Retention aids, defoamers, aluminum sulfate and others previously added adjuvants.
• This thin material is placed over the headbox of the paper machine on the Led wire section. It is a nonwoven fabric formed and after draining, get the decorative base paper which then dried.
• Resin dispersions impregnated or impregnated are common synthetic resin dispersions for example, those based on polyacrylic or Polyacrylmethyl esters, polyvinyl acetate, polyvinyl chloride or synthetic resin solutions based on phenol / formaldehyde, Urea / formaldehyde or melamine / formaldehyde precondensates or their compatible mixtures.
• the impregnation can also be done in the size press of the Paper machine done.
• the decorative paper can be so be impregnated, that the paper is not complete is impregnated by.
• Such decorative papers are also referred to as prepregs.
• the proportion of in the Decorative base paper by impregnation of incorporated resin is in this case 25 to 30 wt.%, Based on the Weight of the paper.
• the soaked papers can still be painted and printed and then on a Substrate can be applied as a wooden board.
• the lacquered and optionally printed products generally referred to as decorative films.
• the basic mixture was a pulp mixture of 70% by weight. Eucalyptus pulp and 30% by weight softwood pulp with 0.6% by weight of epichlorohydrin resin as wet strength agent, 0.11 % By weight of a retention aid and 0.03% by weight of a Defoamer, the latter three components in each case on the mass of the pulp mixture, added.
• the Mixture was brought to a pH of with aluminum sulfate 6.5 set.
• This mixture was made with a pigment mixture 55.8% by weight of titanium dioxide and 5.2% by weight of talc.
• a decorative paper having a basis weight of 105 g / m 2 was produced on a Fourdrinier paper machine.
• the titanium dioxide content was 33.5 g / m 2 (31.9 wt.%)
• the talc content 3.1 g / m 2 (2.95 wt.%).
• the talc had a particle size distribution D50 of 1.9 ⁇ m and a specific surface area of 44,300 m 2 / kg.
• Example 1 To the base mixture of Example 1 was a Pigment mixture of 50.3% by weight titanium dioxide and 14.7% by weight Given talc.
• a decorative paper having a basis weight of 105 g / m 2 was produced on a Fourdrinier paper machine.
• the titanium dioxide content was 30.2 g / m 2 (28.8 wt.%)
• the talc content 8.8 g / m 2 (8.4 wt.%).
• the talc had a particle size distribution D50 of 1.9 ⁇ m and a specific surface area of 44,300 m 2 / kg.
• Example 2 To the masterbatch of Example 1, a pigment mixture of 64.5 wt.% Titanium dioxide and 3.3 wt.% Talc was added. A decorative paper having a basis weight of 105 g / m 2 was produced on a Fourdrinier paper machine. The titanium dioxide content was 38.7 g / m 2 (36.5 wt.%) And the talc content 2.0 g / m 2 (1.9 wt.%). The talc had a particle size distribution D50 of 1.9 ⁇ m and a specific surface area of 44,300 m 2 / kg.
• Example 2 To the base mixture from Example 1, a pigment mixture of 53.9 wt.% Titanium dioxide and 11.3 wt.% Talc was added. A decorative paper having a basis weight of 105 g / m 2 was produced on a Fourdrinier paper machine. The titanium dioxide content was 32.3 g / m 2 (30.8 wt.%) And the talc content 6.8 g / m 2 (6.5 wt.%). The talc had a particle size distribution D50 of 1.5 ⁇ m and a specific surface area of 47,100 m 2 / kg.
• Example 2 As Comparative Example 1, only a 62% strength by weight titanium dioxide dispersion was added to the base mixture from Example 1.
• Example 2 To the base mixture of Example 1, a pigment mixture of 50.8 wt.% Titanium dioxide and 14.4 wt.% Talc was added. A decorative paper having a basis weight of 105 g / m 2 was produced on a Fourdrinier paper machine. The titanium dioxide content was 30.5 g / m 2 (29% by weight) and the talc content 8.7 g / m 2 (8.3% by weight). The talc had a particle size distribution D50 of 3.7 ⁇ m and a specific surface area of 8,600 m 2 / kg.
• the results of the opacity measurement show that with the The talc used according to the invention has a high opacity even with a significantly reduced titanium dioxide content can be achieved.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Biochemistry (AREA)
• Inorganic Chemistry (AREA)
• Paper (AREA)
• Laminated Bodies (AREA)

Applications Claiming Priority (3)

Publications (3)

Family

ID=27623823

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (20)

Family Cites Families (6)

• 2000
  • 2000-11-17 DE DE10057294A patent/DE10057294C5/de not_active Expired - Fee Related
• 2001
  • 2001-11-08 EP EP01126632A patent/EP1207233B1/de not_active Revoked
  • 2001-11-15 CA CA002363357A patent/CA2363357C/en not_active Expired - Fee Related
  • 2001-11-16 CN CN01137694.5A patent/CN1237226C/zh not_active Expired - Fee Related
  • 2001-11-16 BR BRPI0105275-6A patent/BR0105275B1/pt not_active IP Right Cessation
  • 2001-11-16 PL PL350718A patent/PL201227B1/pl unknown

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