[go: up one dir, main page]

EP2794991B1 - Papiers supports d'abrasif imprégnés et papiers abrasifs fabriqués à partir de ceux-ci - Google Patents

Papiers supports d'abrasif imprégnés et papiers abrasifs fabriqués à partir de ceux-ci Download PDF

Info

Publication number
EP2794991B1
EP2794991B1 EP12808683.2A EP12808683A EP2794991B1 EP 2794991 B1 EP2794991 B1 EP 2794991B1 EP 12808683 A EP12808683 A EP 12808683A EP 2794991 B1 EP2794991 B1 EP 2794991B1
Authority
EP
European Patent Office
Prior art keywords
abrasive paper
impregnated
abrasive
paper
raw abrasive
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.)
Active
Application number
EP12808683.2A
Other languages
German (de)
English (en)
Other versions
EP2794991A2 (fr
Inventor
Christine DÖGE
Peter Karl
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.)
Neenah Gessner GmbH
Original Assignee
Neenah Gessner GmbH
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 Neenah Gessner GmbH filed Critical Neenah Gessner GmbH
Publication of EP2794991A2 publication Critical patent/EP2794991A2/fr
Application granted granted Critical
Publication of EP2794991B1 publication Critical patent/EP2794991B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/02—Wheels in one piece
    • B24D5/04—Wheels in one piece with reinforcing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/001—Manufacture of flexible abrasive materials
    • B24D11/005—Making abrasive webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/02—Backings, e.g. foils, webs, mesh fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/001—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as supporting member
    • B24D3/002—Flexible supporting members, e.g. paper, woven, plastic materials
    • B24D3/004—Flexible supporting members, e.g. paper, woven, plastic materials with special coatings
    • 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
    • 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
    • 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
    • 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
    • D21H17/52—Epoxy resins
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/46—Non-macromolecular organic compounds
    • D21H19/48—Diolefins, e.g. butadiene; Aromatic vinyl monomers, e.g. styrene; Polymerisable unsaturated acids or derivatives thereof, e.g. acrylic acid
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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

Definitions

  • the invention relates to an impregnated abrasive paper high flexibility and a basis weight 110 - 360 g / m 2 according to the preamble of claim 1, a sandpaper produced therefrom, and a method for producing such Schleifrohpapiere and abrasive papers.
  • Paper carriers have been used for many years to produce sheet, belt and disc shaped abrasives. A distinction is made between dry grinding and wet grinding papers.
  • the U.S. Patent 4,240,807 describes by way of example the differences between these two sandpaper variants.
  • Typical wet grinding papers are very porous and flexible and saturated with 15-40% of a synthetic resin. They have a basis weight from 70 to 200 g / m 2 . These wet sanding papers are soft and flexible, but also very firm and resistant, especially when soaked in water.
  • Sandpaper is coated on at least one side with a so-called base resin. The base resin serves to bond the abrasive grains with the abrasive paper backing.
  • the base resin does not penetrate into the porous paper, but remains on the surface, between the impregnated paper and the base resin often an intermediate coating, the so-called barrier coat applied.
  • the disadvantage of the wet grinding papers described is their high porosity and the associated high absorbency compared to aqueous impregnating agents.
  • the aqueous impregnating agent should be absorbed quickly and evenly by the paper during the impregnation process, so that a high nip strength and flexibility is achieved, on the other hand absorbs the paper due to the high absorbency much water with the impregnation, which must be removed in the subsequent drying again , This is associated with a very high energy consumption, which is economically as well as environmentally questionable.
  • cellulose fibers In the production of abrasive papers, cellulose fibers, ie fibers from renewable raw materials, are preferably used.
  • the aqueous impregnating agents used are based mainly on petroleum raw materials. The less impregnating agent is used in relation to the raw materials used for the production of sandpaper, the better the ratio of non-renewable to environmentally friendly, renewable raw materials.
  • Typical dry sanding papers are very dense, less porous and much stiffer than wet sandpaper.
  • Dry grinding papers are impregnated with 0-15% of a synthetic resin and have a basis weight of 65-200 g / m 2 .
  • To reduce the absorbency of these papers are glued.
  • Dry abrasive papers are typically coated directly with the base resin, but may also have a barrier line between the paper surface and the base resin. Dry abrasive papers have the disadvantage that the pulp used for their production is very heavily ground. These papers are therefore only slightly porous and very stiff. Due to the low porosity, often associated with a complete sizing, these papers are hardly absorbent and the impregnation does not penetrate the paper, but is mainly on the two surfaces.
  • the paper is sealed well against the subsequently applied base coat and on a barrier line can be dispensed with in many cases. Due to the high rigidity, these sanding papers bend easily at the edges. As a result, the bond between base coat and paper carrier is damaged and the abrasive grain breaks at these points. A similar effect occurs at point loads during the grinding process.
  • the stiff dry-sanding paper does not spread these loads evenly over a larger area, as is the case with flexible wet-sanding papers, but absorbs all the stress at the point of origin. This often leads to overloading of the bond between the base coat and the paper and consequently to a tearing of the abrasive grains at this point.
  • the British patent GB 1,012,441 describes the production of abrasive papers from highly porous, unground base papers, which are compressed and compressed between a cylinder and a blanket.
  • the papers are preferably impregnated prior to compaction.
  • the abrasive papers produced thereby are flexible and have a high gap strength.
  • their high surface roughness and the high elongation in the longitudinal direction due to the compression process are disadvantageous.
  • the high surface roughness excludes a coating of fine abrasive grains. Because of the high elongation, the abrasive papers can not be used as abrasive belts or grinding wheels because they deform during the grinding process and become unusable.
  • Object of the present invention is, therefore, impregnated abrasive base papers with basis weights of 110 - 360 provide g / m 2 , which have the same flexibility and strength, as in the US 4,240,807 described wet grinding papers, but are significantly cheaper and more environmentally friendly to manufacture.
  • the abrasive base paper according to the invention is partially glued by means of a synthetic sizing agent.
  • the addition amount of the sizing agent is between 0.5% and 3.0% based on the dry fibers, so that the abrasive base paper has a suction height in the longitudinal direction of 2 mm to 70 mm.
  • the abrasive base paper is impregnated with an aqueous impregnating agent.
  • the abrasive base paper has a tensile stiffness index in the longitudinal direction of 2.0 MNm / kg to 7.0 MNm / kg and a modulus of elasticity in the longitudinal direction of 2000 to 5500 MPa.
  • the inventive abrasive base paper can preferably be used as a replacement for the known dry abrasive papers.
  • use as wet sandpaper is also possible.
  • Abrasive materials for example abrasive belts and grinding wheels, which are produced from the inventive abrasive base paper have a significantly longer service life than abrasives from the known dry abrasive papers. Due to the much higher flexibility and elasticity of the abrasive base paper according to the invention, the abrasives produced therefrom better absorb the punctiform loads and edge loads arising during use. As a result, significantly fewer abrasive grains are torn and the abrasive can be used much longer than an abrasive made from the known dry abrasive papers.
  • the abrasive paper according to the invention comprises an impregnated abrasive base paper which contains a synthetic sizing agent and has been sanded on at least one side.
  • the impregnated abrasive base paper can be coated with a barrier coat before the application of the base coat.
  • the impregnated abrasive base paper can still be calendered.
  • Natural, synthetic and / or inorganic fibers are used to produce the abrasive base paper according to the invention.
  • suitable natural fibers are cellulose fibers from softwoods, hardwoods, cotton and other suitable plants.
  • Other examples of natural fibers are wool and silk.
  • Suitable synthetic fibers are, for example, fibers made of regenerated cellulose, polyester, polypropylene, polyvinyl alcohol, polyamide and multicomponent fibers.
  • Suitable inorganic fibers are e.g. Glass fibers, basalt fibers and carbon fibers.
  • the fibers are dispersed in water in a known manner.
  • To the pulp thus produced is then added according to the invention so much of a synthetic sizing agent that the fibers are partially covered on their surface with sizing. It is important to ensure that not too much sizing agent is added and the fibers are completely covered.
  • the partial covering of the fiber surface with the sizing agent also called partial sizing, reduces the absorbency of the abrasive base paper formed from this pulp.
  • the reduced absorbency of the abrasive base paper according to the invention causes a lower water and impregnant absorption in the subsequent impregnation with aqueous impregnating agents.
  • the aqueous impregnating agent is equally equally distributed in the paper as in a not sized paper.
  • the amount of synthetic sizing agent necessary for a partial sizing of the abrasive raw paper according to the invention is determined by the suction height of the paper support.
  • the addition amount of the synthetic sizing agent is between 0.5 and 3.0% based on the dry fibers.
  • the synthetic sizing agent can be added to both the thinstock and the thick stock.
  • the synthetic sizing agent can be dosed directly into the pulper or added before and / or after the vertical sizer.
  • Suitable synthetic sizing agents for producing the inventive abrasive base paper are, for example, styrene-acrylic acid ester copolymers, acrylonitrile-acrylic acid ester copolymers, mixtures of alkyldiketene and acrylic ester copolymers, styrene-acrylic acid ester copolymers, acrylic ester copolymers or mixtures thereof.
  • the synthetic sizing agents may be nonionic, anionic, cationic or amphoteric.
  • a cationic polyelectrolyte as a retention agent to bind the anionic synthetic sizing agent to the likewise anionic cellulose fiber.
  • Suitable retention aids are, for example, bentonites, polyacrylamides, Polyethyleneimines, polyvinylamines or mixtures thereof.
  • paper stock can be further added, if necessary, further customary in papermaking auxiliaries, such as wet strength agents, fillers, fixing agents and / or colors.
  • the abrasive base paper thus produced has a basis weight of 100-300 g / m 2 , preferably 120-280 g / m 2 and particularly preferably 120-260 g / m 2 , a suction height in the longitudinal direction of 2-70 mm, preferably of 3 - 65 mm and more preferably from 5 - 60 mm, a porosity of 40 - 70%, preferably from 45 - 70% and particularly preferably from 50 - 70%, a thickness of 0.20 - 1.00 mm, preferably from 0 , 20-0.90 mm and more preferably from 0.20-0.80 mm, a breaking force dry in the longitudinal direction of 50-500 N / 15 mm, preferably 60-450 N / 15 mm
  • the longitudinal direction is understood to mean the paper maker's usual designation for the running direction of the paper through the paper machine.
  • Transverse direction therefore refers to the direction at 90 ° angle across the direction of the paper.
  • the abrasive base paper is then impregnated. That is, the paper is impregnated with an impregnating agent.
  • An impregnation penetrates the entire abrasive base paper evenly and thus differs from a superficially applied coating.
  • the impregnation is necessary in order to give the inventive abrasive base paper the necessary strength and flexibility, to create a non-absorbent substrate for the subsequent coatings and to glue the individual fibers together so strongly that the abrasive grains applied in a subsequent operation are not too weak Fiber-to-fiber bonds during application tear from the surface of the abrasive paper according to the invention.
  • the nip strength measures the fiber-fiber bond perpendicular to the surface of the paper carrier.
  • Impregnated paper supports in which the impregnant is concentrated only on the surface of the paper support have a nip strength equivalent to that of the unimpregnated paper support, while paper supports completely saturated with impregnant have a significantly higher nip strength.
  • the gap strength, measured in the transverse direction, for the inventive impregnated abrasive base paper is 1.5-6.0 N / 25 mm, preferably 1.8-5.5 N / 25 mm and particularly preferably 2.0-5.0 N / 25 mm.
  • Non-impregnated abrasive base papers usually have a transverse splitting strength of 1.3-1.5 N / 25 mm.
  • Suitable impregnating agents for the production of the abrasive base paper according to the invention are polymer dispersions, polymer solutions or mixtures thereof.
  • Suitable polymer dispersions are, for example, aqueous dispersions of acrylic esters, polyvinyl acetate, acrylonitrile-butadiene rubber, acrylate-styrene copolymers, ethylene-vinyl acetate copolymers, styrene-butadiene rubber, phenolic resin, epoxy resin, natural rubber or mixtures thereof.
  • Suitable polymer solutions include polyvinyl alcohol in water, starch in water, melamine-formaldehyde resin in water, urea-formaldehyde resin in water or mixtures it.
  • a particularly suitable impregnating agent according to the invention is an aqueous Sytrol-butadiene rubber dispersion having a glass transition temperature between -30 ° C and +20 ° C.
  • the amount of impregnating agent is between 5% by weight and 20% by weight, preferably between 10% by weight and 15% by weight, of the dry dispersion, based on the weight of the paper to be impregnated.
  • a barrier coat is applied to one side of the impregnated paper.
  • This barrier coat can be prepared, for example, by applying an aqueous dispersion based on acrylic acid esters, polyvinyl acetate, acrylonitrile-butadiene rubber, acrylic ester-styrene copolymers, ethylene-vinyl acetate copolymers, styrene-butadiene rubber, phenolic resin, epoxy resin, natural rubber or mixtures thereof ,
  • the amount applied after drying is 2 - 15 g / m 2 , preferably 3 - 12 g / m 2 .
  • Both the impregnating agent and the barrier can still be added various additives and / or fillers.
  • additives are paints, crosslinking agents, water repellents, oil repellents, hydrophilicizing agents, antistatic agents or mixtures thereof.
  • fillers e.g. Kaolin, titanium dioxide, talc, calcium carbonate, silica, bentonites or mixtures thereof.
  • the impregnation of the abrasive base paper and coating of the impregnated abrasive base paper can either inside the paper machine or outside in one specially designed impregnation and coating machine happen.
  • Suitable impregnation methods are, for example, size press, dip impregnation, foam impregnation, roll impregnation or spraying.
  • Suitable coating methods are, for example, roller blade, knife blade, air brush or roller application.
  • the impregnated and possibly coated with barrier coating abrasive base paper can be calendered.
  • the impregnated abrasive base paper according to the invention preferably passes through the nip of a pair of rolls consisting of a steel roll and a rubber roll with a nip pressure of from 30 to 300 N / mm, preferably from 50 to 250 N / 15 mm. If the impregnated abrasive base paper according to the invention is coated with a barrier coating, it is fed to the calender in such a way that the side comes into contact with the barrier coating with the steel roll.
  • the calendering temperature is between 20 ° and 80 ° C, preferably between 50 and 70 ° C.
  • the impregnated and calendered abrasive base paper according to the invention has a basis weight of 110-360 g / m 2 , preferably of 120-340 g / m 2 and more preferably of 130-310 g / m 2 , a thickness of 0.14-0.90 mm , preferably from 0.15 to 0.80 mm and more preferably from 0.16 to 0.70 mm, a porosity of from 20 to 70%, preferably from 20 to 60% and particularly preferably from 20 to 50%, a breaking force dry in the longitudinal direction of 150-550 N / 15mm, preferably 170-500 N / 15mm, more preferably 180-450 N / 15mm, dry ultimate tensile strength of 80-300 N / 15mm, preferably 90-280 N / 15mm , more preferably from 100 to 270 N / 15mm, an elongation dry in Lengthwise from 1.0 to 5.0%, preferably from 1.1 to 4.8%, more preferably from 1.2 to 4.5%, dry to
  • the impregnated, barrier-coated and calendered abrasive paper according to the invention has a basis weight of from 115 to 370 g / m 2 , preferably from 125 to 350 g / m 2 and particularly preferably from 135 to 320 g / m 2 , a thickness of 0.15.
  • 0.90 mm preferably 0.16-0.80 mm and more preferably 0.17-0.70 mm, a porosity of 20-70%, preferably 20-60% and particularly preferably 20-50% , a breaking force dry in the longitudinal direction of 150-550 N / 15mm, preferably 170-500 N / 15mm, more preferably 180-450 N / 15mm, a transverse dry tensile strength of 80-300 N / 15mm, preferably 90-280 N / 15mm, more preferably from 100 to 270 N / 15mm, an elongation dry in the longitudinal direction of 1.0 to 5.0%, preferably 1.1 to 4.8%, more preferably 1.2 to 4.5%, an elongation dry in Transverse direction from 2.0 to 9.0%, preferably from 2.5 to 8.7%, particularly preferably from 2.8 to 8.5%, a tear propagation resistance according to Elmendorf in the transverse direction of 800 to 3000 mN, preferably of 1000 2700 mN, more preferably from 1200 to 2500 mN, a
  • the impregnated and calendered base paper according to the invention is still sanded.
  • Besanden is understood to mean the application of a base coat to the inventive abrasive base paper which then sprinkling the abrasive grain, drying the base coat, applying a top coat to the abrasive grain, and finally drying the top coat.
  • the base coat consists z.
  • the abrasive grains are then sprinkled onto the still-wet basecoat, the individual grains being optimally aligned by electrostatic devices on the abrasive base paper. Subsequently, the abrasive base paper coated with the wet base coat and the abrasive grains adhering thereto runs in a drying oven in which the base coat is dried. After drying, the abrasive grains are coated with the topcoat.
  • the topcoat is usually a hard, thermosetting resin which additionally anchors the abrasive grains on the sandpaper. The sanding is completed by the hardening of the primer and topcoat.
  • the abrasive paper according to the invention is used as grinding wheels, abrasive belts and bow-shaped abrasive articles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Paper (AREA)

Claims (10)

  1. Papier brut abrasif imprégné, réalisé à partir de fibres non broyées ou seulement très peu broyées, présentant une masse surfacique de 110 à 360 g/m2, caractérisé en ce que le papier brut abrasif est partiellement encollé au moyen d'un agent d'encollage synthétique, la quantité ajoutée d'agent d'encollage étant de 0,5 % à 3 % par rapport aux fibres sèches, de telle sorte que le papier brut abrasif possède une hauteur d'aspiration en direction longitudinale de 2 mm à 70 mm, et en ce que le papier brut abrasif est imprégné avec un agent d'imprégnation aqueux, le papier brut abrasif imprégné possédant un indice de rigidité à la traction en direction longitudinale de 2,0 MNm/kg à 7,0 MNm/kg et un module d'élasticité en direction longitudinale de 2000 à 5500 MPa.
  2. Papier brut abrasif imprégné selon la revendication 1, caractérisé en ce que le papier brut abrasif est imprégné avec 5 % à 20 % en poids de l'agent d'imprégnation sec par rapport à la fibre sèche.
  3. Papier brut abrasif imprégné selon la revendication 1 ou 2, caractérisé en ce que le papier brut abrasif imprégné possède sur la face lisse un lissé selon Bekk de 5 s à 50 s.
  4. Papier brut abrasif imprégné selon l'une des revendications précédentes, caractérisé en ce que le papier brut abrasif imprégné possède sur une face une couche barrière.
  5. Papier brut abrasif imprégné selon la revendication 4, caractérisé en ce que le papier brut abrasif imprégné possède un lissé selon Bekk sur la face de la couche barrière de 40 s à 400 s.
  6. Papier brut abrasif imprégné selon l'une des revendications précédentes, caractérisé en ce que le papier brut abrasif imprégné est calandré.
  7. Papier abrasif comportant un papier brut abrasif imprégné selon au moins l'une des revendications 1 à 6, caractérisé en ce qu'il est revêtu, au moins sur une face, par une laque de fond, par des grains abrasifs et par une laque de finition.
  8. Procédé de fabrication de papier brut abrasif imprégné à partir de fibres non broyées ou seulement très peu broyées, caractérisé en ce que les fibres sont partiellement encollées par ajout de 0,5 % à 3,0 % d'un agent d'encollage synthétique, par rapport aux fibres sèches, de telle sorte que le papier brut abrasif possède une hauteur d'aspiration en direction longitudinale de 2 mm à 70 mm, et en ce que le papier brut abrasif est ensuite imprégné au moyen d'un agent d'imprégnation aqueux, de telle sorte que le papier brut abrasif imprégné obtient un indice de rigidité à la traction en direction longitudinale de 2,0 MNm/kg à 7,0 MNm/kg et un module d'élasticité en direction longitudinale de 2000 à 5500 MPa.
  9. Procédé selon la revendication 8, caractérisé en ce qu'une laque de fond, des grains abrasifs et une laque de finition sont appliqués sur le papier brut abrasif imprégné.
  10. Utilisation du papier brut abrasif imprégné selon l'une des revendications 1 à 6 pour la fabrication de disques abrasifs, de bandes abrasives et de feuilles abrasives.
EP12808683.2A 2011-12-22 2012-12-12 Papiers supports d'abrasif imprégnés et papiers abrasifs fabriqués à partir de ceux-ci Active EP2794991B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011122012.0A DE102011122012B4 (de) 2011-12-22 2011-12-22 Imprägniertes Schleifrohpapier, Verfahren zur Herstellung von imprägniertem Schleifrohpapier und dessen Verwendung
PCT/EP2012/005128 WO2013091798A2 (fr) 2011-12-22 2012-12-12 Papiers supports d'abrasif imprégnés et papiers abrasifs fabriqués à partir de ceux-ci

Publications (2)

Publication Number Publication Date
EP2794991A2 EP2794991A2 (fr) 2014-10-29
EP2794991B1 true EP2794991B1 (fr) 2016-09-14

Family

ID=47469867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12808683.2A Active EP2794991B1 (fr) 2011-12-22 2012-12-12 Papiers supports d'abrasif imprégnés et papiers abrasifs fabriqués à partir de ceux-ci

Country Status (3)

Country Link
EP (1) EP2794991B1 (fr)
DE (1) DE102011122012B4 (fr)
WO (1) WO2013091798A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014006822B4 (de) * 2014-05-08 2016-03-03 Neenah Gessner Gmbh Schleifmittelträger und Schleifmittelträger mit mindestens zwei Lagen eines Trägermaterials sowie daraus hergestellter Schleifartikel
EP3403765B1 (fr) * 2017-05-19 2022-04-13 Hermes Schleifmittel GmbH Couche d'adhérence pour produit abrasif
CN115338785B (zh) * 2022-08-19 2024-09-27 安徽凯耐德研磨制品有限公司 一种kf强力打磨片的制作方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE630279A (fr) 1956-11-23 1900-01-01
DE1469865A1 (de) * 1961-01-21 1969-03-27 Carborundum Co Schleifmittel und Verfahren zu seiner Herstellung
US4240807A (en) 1976-01-02 1980-12-23 Kimberly-Clark Corporation Substrate having a thermoplastic binder coating for use in fabricating abrasive sheets and abrasive sheets manufactured therewith
DE2621119A1 (de) * 1976-05-13 1977-12-01 Herberts & Co Gmbh Dr Kurt Verfahren zur herstellung von einseitig verklebbaren ausgehaerteten schichtstoffbahnen
DE2746833A1 (de) * 1977-10-14 1979-04-19 Kimberly Clark Co Traegermaterial fuer biegsame schleifblaetter
DE3541187C2 (de) * 1985-11-21 1994-10-06 Kaemmerer Gmbh Verfahren zur Herstellung einer mit Kunstharzen imprägnierten Papierbahn sowie deren Verwendung
US5622786A (en) * 1994-11-30 1997-04-22 Kimberly-Clark Corporation Polymer-reinforced, eucalyptus fiber-containing paper
US20060265966A1 (en) 2005-05-24 2006-11-30 Rostal William J Abrasive articles and methods of making and using the same
US9133578B2 (en) * 2009-05-27 2015-09-15 Cellutech Ab Polymer made of a primary amine functionalized polymer and a hemicellulose
DE102010016864B4 (de) * 2010-05-10 2018-09-27 Papierfabrik Julius Schulte Söhne GmbH & Co. KG Faserstoffhaltiges Kernpapier, Verfahren zu dessen Herstellung und dessen Verwendung

Also Published As

Publication number Publication date
WO2013091798A2 (fr) 2013-06-27
EP2794991A2 (fr) 2014-10-29
WO2013091798A3 (fr) 2013-11-28
DE102011122012B4 (de) 2017-04-06
DE102011122012A1 (de) 2013-06-27

Similar Documents

Publication Publication Date Title
DE69603539T2 (de) Neue adhesive Zusammensetzungen zum Kreppen, Verfahren zum Kreppen und gekrepptes fibröses Gewebe
DE69626284T2 (de) Verfahren zur herstellung eines dekorativen wärmehärtbarenkunsstoffverbundmaterials
EP2734674B1 (fr) Substrat pour bande de raccord de panneau mural et son processus de fabrication
DE1965716B2 (de) Saugfähige Bahn aus Zellulosefasern und Verfahren zu deren Herstellung
DE3541187C2 (de) Verfahren zur Herstellung einer mit Kunstharzen imprägnierten Papierbahn sowie deren Verwendung
DE112014005939T5 (de) Hygienetuchprodukte
EP2794991B1 (fr) Papiers supports d'abrasif imprégnés et papiers abrasifs fabriqués à partir de ceux-ci
EP3063000B1 (fr) Mouchoir en papier crêpé durable
DE112022005275T5 (de) Bahnmaterialstrukturierband, Verfahren zur Herstellung eines strukturierten Bahnmaterials und durch das Verfahren hergestelltes strukturiertes Bahnmaterial
CN102837554B (zh) 预浸料坯
DE1635701B2 (de) Verfahren zum herstellen eines textilaehnlichen materials
DE112022005274T5 (de) Bahnmaterialstrukturierungsband, Verfahren zur Herstellung eines strukturierten Bahnmaterials und durch das Verfahren hergestelltes strukturiertes Bahnmaterial
DE102014006822B4 (de) Schleifmittelträger und Schleifmittelträger mit mindestens zwei Lagen eines Trägermaterials sowie daraus hergestellter Schleifartikel
EP3074182B1 (fr) Support d'abrasif, particules abrasives comprenant le support d'abrasif et procédé de production associé
EP2386614A1 (fr) Papier adhésif respectant l'environnement et bande adhésive fabriquée à partir de celui-ci
DE102017214827B4 (de) Schleifmittelträger mit Gradientenstruktur
US20050136779A1 (en) Process for reinforcing a hydro-entangled pulp fibre material, and hydro-entangled pulp fibre material reinforced by the process
JP3394404B2 (ja) 床材用裏打ち基材及びその製造方法
CN112095364A (zh) 具有改善的平整度的预浸料
DE202010005924U1 (de) Umweltfreundliches Klebebandpapier und daraus hergestelltes Klebeband
DE102015221294B3 (de) Schleifscheiben, insbesondere Trennscheiben, und Herstellungsverfahren dafür
DE102015006672B4 (de) Imprägnierter Schleifmittelträger für feine Körnungen und daraus hergestellter Schleifartikel
EP3455404B1 (fr) Réduction de poussière de mouchoir en papier
EP3167118B1 (fr) Matériau de base pour tapisseries
WO2009138124A1 (fr) Film de recouvrement résistant à l'abrasion et aux rayures, et stratifié obtenu au moyen de ce film

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140612

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160617

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 829139

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161015

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502012008283

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 5

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20160914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161214

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161215

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170116

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161231

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161214

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170114

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502012008283

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20170615

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20161214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161231

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161212

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161212

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161214

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 6

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20161231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20121212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502012008283

Country of ref document: DE

Representative=s name: FLACH BAUER & PARTNER PATENTANWAELTE MBB, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 502012008283

Country of ref document: DE

Representative=s name: FLACH BAUER STAHL PATENTANWAELTE PARTNERSCHAFT, DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160914

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 829139

Country of ref document: AT

Kind code of ref document: T

Effective date: 20171212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171212

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230525

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502012008283

Country of ref document: DE

Representative=s name: HL KEMPNER PATENTANWALT, RECHTSANWALT, SOLICIT, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 502012008283

Country of ref document: DE

Representative=s name: HL KEMPNER PATENTANWAELTE, SOLICITORS (ENGLAND, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 502012008283

Country of ref document: DE

Representative=s name: HL KEMPNER PARTG MBB, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20241001

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20250930

Year of fee payment: 14