Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/30—Ink jet printing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/46—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
  • D06P1/48—Derivatives of carbohydrates
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/46—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
  • D06P1/48—Derivatives of carbohydrates
  • D06P1/50—Derivatives of cellulose
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
  • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
  • D06P1/5257—(Meth)acrylic acid
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
  • D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
  • D06P1/5285—Polyurethanes; Polyurea; Polyguanides
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/673—Inorganic compounds
  • D06P1/67333—Salts or hydroxides
  • D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/001—Special chemical aspects of printing textile materials
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/002—Locally enhancing dye affinity of a textile material by chemical means

Definitions

• the present invention relates to methods and formulations for pre-treatment of printed textile.
• Textile made from polyamide or polyester can be printed by means of a digital inkjet printer.
• end FO3-
• stains dyes or inks.
• inks are often difficult to fix. Poor fixation leads to various challenges such as colour bleeding or washout, fixation problems, colour fading, insufficient water resistance, insufficient abrasion resistance, contamination of washing water, dulling of colours, insufficient penetration into the yarn (in particular for carpet that has a 3D structure, because of the height of the pile), etc.
• old print technologies commonly use a large amount of ink. The old technologies involve a pick-up of 100 to 1000% of the yarn weight.
• the present invention provides a solution for the above challenges.
• the inventors discovered, surprisingly, that poor fixation of various dyes or inks is related to the pH of the inks, which commonly have a high pH, i.e. a pH value above 7. Inks that have such a high pH are often very difficult to fix on polyamide or polyester textile.
• the inventors also discovered, surprisingly, that a pre-treatment such as provided herein allows materials to be printed with a small amount of ink.
• a method for preparing a pre-treatment liquid comprising the following steps:
• step c) is followed by: d) diluting the pre-treatment liquid obtained in step c), preferably by adding water that has a volume that is identical to min. 10.0% to max. 300.0% of the volume of the pre-treatment liquid obtained in step c).
• the water that is used in any of steps a), b), and/or d) has a hardness of max. 2.0°dH.
• the water that is used in any of steps a), b), and/or d) is demineralized water.
• the thickener that is used in step a.i) is an oil-based thickener, preferably an oil-based synthetic thickener, more preferably an oil-based synthetic thickener selected from the list comprising acrylate and polyurethane.
• step a.i) the oil-based thickener is added to the water to form a mixture of thickener in water that comprises from min. 0.0020 kg/I to max. 0.050 kg/I thickener, or from min. 0.0050 kg/I to max. 0.025 kg/I thickener, or from min. 0.0080 kg/I to max. 0.012 kg/I thickener.
• step a.i) is followed by: a.ii) stirring the first mixture of thickener in water.
• the thickener that is used in step b.i) is a natural thickener, preferably the thickener that is used in step b.i) is a guar- or cellulose-based thickener, preferably a guar-based thickener.
• step b.i) the guar-based thickener is added to the water to form a mixture of thickener in water that comprises from min. 0.0050 kg/I to max. 0.08 kg/I thickener, or from min. 0.01 kg/I to max. 0.05 kg/I thickener, or from min. 0.02 kg/I to max. 0.03 kg/I thickener.
• step b.i) is followed by: b.ii) stirring the second mixture of thickener in water.
• step c.iii) is followed by: c.iv) adding one or more additives selected from the list comprising preservatives and absorbents.
• a pre-treatment liquid for a textile, preferably a carpet, is further provided herein, comprising:
• a method for pre-treating a textile comprising the following steps:
• a method for applying a pattern on a textile comprising steps:
• the textile is a carpet, preferably the carpet comprises polyamide and/or nylon yarns.
• a method for preparing a pre-treatment liquid comprises separately preparing a first mixture and a second mixture, which are then pooled. Both the first mixture and the second mixture comprise a thickener in water, wherein the thickeners are not the same. This has the advantage that two thickeners that cannot be mixed together can nevertheless be incorporated together in a pre-treatment liquid. Provision of the two different thickeners in the pre-treatment liquid allows a wider range of application methods on textile, both digital and non-digital.
• the method comprises step a), preparing a first mixture in a first vessel by a.i) adding a thickener to water to form a mixture of thickener in water, which preferably comprises from min. 0.0010 kg/I to max. 0.10 kg/I thickener, or that comprises from min. 0.0010 kg/I to max. 1.0 kg/I thickener.
• the first mixture has a viscosity that is higher than 2.0 mPa ⁇ s.
• the thickener that is used in step a.i) is an oil-based thickener.
• This thickener allows the viscosity to be controlled.
• an amount of thickener is selected so that the viscosity, as measured by a viscosimeter, of the final pre-treatment liquid is from 1.0 to 1.5 mPa ⁇ s.
• it is an oil-based synthetic thickener.
• this thickener is a synthetic oil-based thickener, also called a synthetic oil-borne thickener.
• the oil-based synthetic thickener is a synthetic thickener that is soluble in oil.
• a synthetic oil-borne thickener has the advantage that it leads to brilliant colours.
• Examples of synthetic oil-based thickeners are synthetic thickeners that comprise acrylate and/or polyurethane.
• a preferred oil-based thickener is a thickener that comprises polyacrylic acid.
• a preferred oil-based thickener is a thickener that comprises ester oil. The oil may form a capsule round the thickener.
• These oil based synthetic thickeners are preferably liquid. This has the advantage that they are easy to use. These thickeners are also very stable in respect of properties.
• oil based synthetic thickeners have a low viscosity at low stresses, and a high viscosity at high stresses. In English this property is called "shear thickening".
• step a.i) is followed by step a.ii) stirring the first mixture of thickener in water. This improves the homogeneity of the first mixture. By stirring, the oil-based thickeners can function more efficiently.
• step a.i) the oil-based thickener is added to the water to form a mixture of thickener in water that comprises from min. 0.0020 kg/I to max. 0.050 kg/I thickener, or from min. 0.0050 kg/I to max. 0.025 kg/I thickener, or from min. 0.0080 kg/I to max. 0.012 kg/I thickener.
• the method further comprises step b), preparing a second mixture in a second vessel by b.i) adding another thickener to water to form a mixture of thickener in water, which preferably comprises from min. 0.0010 kg/I to max. 0.10 kg/I thickener, or which comprises from min. 0.0010 kg/I to max. 1.0 kg/I thickener.
• natural thickener preferably refers to a polymer thickener, wherein the polymer chain was formed by a natural organism, such as a plant, an alga, a yeast, a bacterium, or an animal.
• the side groups of the polymer thickener may optionally be chemically modified, but such a thickener is still a natural thickener.
• synthetic thickener preferably refers to a polymer thickener wherein the polymer chain was produced chemically or artificially.
• the thickener that is used in step b.i) is a natural thickener.
• the natural thickener is added in powder form to the water. This thickener makes it possible to control the viscosity, so that for example a viscosity of 1.0 to 1.5 mPa ⁇ s is attained in the final pre-treatment liquid.
• the thickener that is used in step b.i) is manufactured from viscose.
• the thickener that is used in step b.i) is a guar-based thickener.
• a guar-based thickener is obtained from beans and/or algae.
• An alternative to the guar-based thickener is natural cellulose (HEC) thickener.
• thickeners have the advantage that they have a particular thixotropy: under stress they are less viscous, and on standing the viscosity builds up again very quickly.
• the expression in English for such liquids is "shear thinning liquids".
• the aforementioned natural thickeners are only acid-sensitive to a limited extent, so they are relatively stable in an acid environment.
• step b.i) is followed by step b.ii) stirring the second mixture of thickener in water. This improves the homogeneity of the second mixture.
• step b.i) the guar-based thickener is added to the water to form a mixture of thickener in water that comprises from min. 0.0050 kg/I to max. 0.08 kg/I thickener, or from min. 0.01 kg/I to max. 0.05 kg/I thickener, or from min. 0.02 kg/I to max. 0.03 kg/I thickener.
• the method further comprises step c), preparing a pre-treatment liquid based on the first mixture and the second mixture by c.i) mixing the first mixture and the second mixture to form a pooled mixture; c.ii) adding acid until the pooled mixture has a pH from min. 2.5 to max. 7, preferably to max. 6.5; and optionally c.iii) adding ammonium sulphate, preferably until the pooled mixture comprises min. 0.001 to max. 0.1 kg/I ammonium sulphate.
• the inventors discovered, surprisingly, that the mixture of synthetic and natural thickeners remains stable through addition of the acid.
• the acid is citric acid.
• the acid is acetic acid.
• a pre-treatment liquid is thus obtained.
• the pre-treatment liquid comprises both a synthetic oil-based thickener and a natural thickener (for example based on guar or HEC).
• a synthetic oil-based thickener for example based on guar or HEC.
• a natural thickener for example based on guar or HEC.
• Addition of ammonium sulphate has the advantage that it improves the fixation of dyes.
• the pre-treatment liquid has a pH below 3.0.
• the pre-treatment liquid does not comprise ammonium sulphate.
• cold fixation means that colours fix very quickly on the textile, preferably the carpet. As a result, “mixed colours” do not mix completely on the carpet.
• cold fixation signifies that the colours fix on the carpet too quickly, so that "mixed colours” do not mix well on the carpet. Two-tone effects may be obtained as a result.
• step c.iii) is followed by: c.iv) adding one or more additives selected from the list comprising preservatives and absorbents.
• a pre-treatment with the present pre-treatment liquid improves the quality and stability of printed materials, in particular carpets, which are printed with high resolution inks. It is to be understood that a pre-treatment is a treatment that is applied before, preferably well before, printing.
• the methods as provided herein allow a yield from min. 60% to max. 150% of yarn weight. Preferably the yield is min. 100% to max. 125%.
• the concepts "yield” and "pick-up rate” as used herein have the same meaning.
• a carpet of 300 g yarn per square meter preferably takes up from at least 180 g pre-treatment liquid, to max. 450 g pre-treatment liquid.
• the concept "pick-up” is explained as follows: in order to print or dye e.g. 300g yarn/m 2 carpet, in a method according to the prior art approx. 3l dye/m 2 is used. (3l / 0.3kg -> 1000%).
• pick-up for example a piece of carpet is weighed “dry” just before printing or dyeing and is weighed again after printing or dyeing. The weight difference between the two weighings gives the pick-up. Sometimes the pick-up is also called the pick-up volume.
• the pre-treatment liquid is acidic.
• the pre-treatment liquid has a pH from min. 2.5 to max. 5.5, preferably from min. 3.5 to max. 4.0. This pH allows good fixation.
• the pre-treatment liquid has a viscosity from min. 60 to max. 230 cP, preferably from min. 110 cP to max. 130 cP.
• the pre-treatment liquid preferably has a viscosity from at least 0.6 mPa ⁇ s to max. 2.3 mPa ⁇ s, preferably from at least 1.0 mPa ⁇ s to max. 1.3 m Pa ⁇ s.
• step c) is followed by step d) diluting the pre-treatment liquid obtained in step c) by adding water, which preferably has a volume that is equal to min. 10.0% to max. 300.0% of the volume of the pre-treatment liquid obtained in step c).
• Provision of a dilution step has the advantage that a concentrated mixture can be transported, and can be diluted just before use. This reduces transport costs.
• the water that is used in any of steps a), b), and/or d) has a hardness of max. 2.0°dH (that is, max. 2.0 German degrees).
• the water that is used in any of steps a), b), and/or d) has a hardness of max. 1.5°dH, or of max. 1.0°dH.
• the water that is used in any of steps a), b), and/or d) is demineralized water.
• the water that is used in any of steps a), b), and/or d) is distilled water.
• the water that is used in any of steps a), b), and/or d) is deionized water.
• demineralized, distilled, and/or deionized water has a positive influence on the stability of the thickeners.
• a mixture is stable when the viscosity and/or the pH remain constant for 1 hour, 12 hours, 24 hours, 1 week, or 1 month, for example within a margin of error of 10%.
• a pre-treatment liquid for a textile, such as a carpet is further provided herein, preferably a pre-treatment liquid prepared according to a method as described herein.
• This preferably comprises min. 0.80 kg/I water; min. 0.00030 kg/I to max. 0.10 kg/I oil-based thickener; min. 0.00060 kg/I to max. 0.10 kg/I guar-based thickener; and, optionally, min. 0.0003 to max. 0.1 kg/I ammonium sulphate.
• the pre-treatment liquid has a pH from min. 2.5 to max. 7.0.
• the pre-treatment liquid comprises min. 0.00060 kg/I to max. 0.05 kg/I oil-based thickener, or min. 0.0012 kg/I to max. 0.025 kg/I oil-based thickener, or min. 0.0025 kg/I to max. 0.01 kg/I oil-based thickener, or min. 0.0050 kg/I to max. 0.0075 kg/I oil-based thickener.
• the pre-treatment liquid comprises min. 0.0012 kg/I to max. 0.05 kg/I guar-based thickener, min. 0.0025 kg/I to max. 0.025 kg/I guar-based thickener, or min. 0.0050 kg/I to max. 0.010 kg/I guar-based thickener.
• the pre-treatment liquid comprises min. 0.0006 to max. 0.050 kg/I ammonium sulphate, min. 0.0012 to max. 0.025 kg/I ammonium sulphate, min. 0.0025 to max. 0.010 kg/I ammonium sulphate, or min. 0.0050 to max. 0.0075 kg/l ammonium sulphate
• the pre-treatment liquid comprises an acid, for example citric acid. This is an efficient way of obtaining a suitable pH.
• the pre-treatment liquid comprises min. 0.0005 kg/l to max. 0.05 kg/l citric acid, or min. 0.001 kg/l to max. 0.025 kg/l citric acid, or min. 0.002 kg/l to max. 0.001 kg/l citric acid, or min. 0.004 kg/l to max. 0.006 kg/l citric acid.
• a method for pre-treating a textile is further provided herein.
• the textile is preferably a carpet.
• the method comprises the following steps: providing a carpet; and applying a pre-treatment coating comprising the pre-treatment liquid as described herein.
• a uniform pre-treatment coating is thus applied, which moreover is stable over time.
• basic inks that is, inks with a pH higher than 7
• problems such as bleeding, washout, and colour fading.
• the pre-treatment liquid is applied by means of a pre-printer.
• the type of pre-printer is not critical. Pre-printers are well known per se in the prior art.
• the pre-printer is configured to print a pre-treatment layer before the pattern is printed.
• the pre-treatment liquid is applied by means of a pressing roll, also called a foulard.
• a foulard is known in the prior art, and is used in continuous dyeing processes.
• the pre-treatment liquid is applied by means of a lick roll (kissing roll).
• a lick roll is partly submerged in a bath of coating liquid and brings the coating liquid onto the textile.
• the pre-treatment liquid is applied with a spraying system.
• the textile is a carpet and the carpet is printed by means of a pre-printer, foulard, a spraying system (for example the so-called "spray painting” technique), foam applicator, screen printing system, rotary printing system, digital printing system, etc.
• a spraying system for example the so-called "spray painting” technique
• foam applicator for example the so-called "spray painting” technique
• screen printing system for example the so-called "spray painting” technique
• rotary printing system for example the so-called "spray painting” technique
• digital printing system etc.
• the pre-treatment liquid on the one hand and the dyes to apply the pattern on the other hand are applied with different machines.
• the textile preferably the carpet, is preferably printed with a resolution that is sharper than 150 dpi, preferably with a definition that is sharper than 120 dpi, preferably with a definition that is sharper than 100 dpi, more preferably with a definition that is sharper than 80 dpi.
• the textile comprises polyamide and/or nylon yarns.
• the textile is preferably a carpet that comprises polyamide and/or nylon yarns.
• a method for applying a pattern on a textile is further provided herein.
• the textile is preferably a carpet.
• the textile is preferably a textile as described herein.
• the method comprises the steps: pre-treating the textile by a method for pre-treating a textile as provided herein, and printing a pattern on the textile.
• the pattern is applied by means of one or more basic inks.
• the pattern is applied on a 300 g textile or 300 g cloth with a surface density of 20 ml/m 2 to 50 ml/m 2 active substances.
• active substances refers to the amount of dye in the ink that is applied.
• a 300 g cloth could be printed with barely 20-50 ml/m 2 'active' substances, i.e. with only barely 20-50 ml/m 2 dyes.
• Suitable oil-based synthetic thickeners are acrylate and polyurethane.
• the resultant mixture can be stored for a considerable time, for example 1 month, before use.
• wetting agents are phosphoric acid esters, sulphonic-dicarboxylic acid esters, and/or ethoxylated alcohols.
• the mixture is diluted with approx. 100 litres of water, i.e. a volume that is roughly equal to the volume of the aforementioned mixture.
• soft water is used with a maximum hardness of 2.0 °dH (German hardness, also dGH). Any type of softened water is suitable. Demineralized water is preferably used.
• a diluted mixture is obtained.
• diluted mixtures are extremely suitable for a pre-treatment for printing carpets.
• a 300 g cloth i.e. a cloth that comprises 300 g yarns per square meter of carpet
• the ink is a mixture of pure dyes, thickeners, additives, and water.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Molecular Biology (AREA)
• Inorganic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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Citations (3)

• 2019
  • 2019-07-05 BE BE20195434A patent/BE1027015B1/nl active IP Right Grant
• 2020
  • 2020-07-03 EP EP20183849.7A patent/EP3760787A1/fr active Pending

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