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
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/34—Material containing ester groups
  • D06P3/52—Polyesters
  • D06P3/56—Preparing azo dyes on the material
• • 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
  • D06P1/02—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 azo dyes
  • D06P1/12—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 azo dyes prepared in situ
• • 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
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/02—Material containing basic nitrogen
  • D06P3/04—Material containing basic nitrogen containing amide groups
  • D06P3/24—Polyamides; Polyurethanes
  • D06P3/28—Preparing azo dyes on the material
• • 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
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/82—Textiles which contain different kinds of fibres
  • D06P3/8204—Textiles which contain different kinds of fibres fibres of different chemical nature
  • D06P3/8214—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing ester and amide groups

Definitions

• the present invention relates to a dyed and / or printed nonwoven fabric made of unsplit and / or at least partially split microfibers and / or microfilaments of synthetic polymers containing at least one polyester component and at least one polyamide component and optionally at least one polyurethane component comprising at least one azo dye formed on the nonwoven fabric dyed and / or printed and a method for its coloring and / or printing.
• Fabric made of plastics textile materials can often be dyed or printed with conventional textile dyeing or textile printing process often in insufficient quality. Difficulties in dyeing or printing arise in particular when the textile material comprises various plastic components, such as polyester and polyamide, since these usually show a very different dyeing behavior, such as BASF "Manual-Dying and Finishing of Polyamide Fibers and their blends with other fibers "B358e / 12.72, page 149.
• nonwovens which consist of a mixture of microfibers and / or microfilaments, such as polyester / polyamide split fibers, since the split fibers are distributed irregularly in the nonwoven, while in corresponding polyamide / polyester microfiber fabrics, however, usually only a component, generally the weft, consists of polyamide / polyester chippings.
• the density of the fibers and / or filaments ie the number of fibers and / or filaments per unit area, higher than corresponding fabrics or knitted fabrics, so that for dyeing
• Such nonwovens require increased amounts of dye.
• This increased use of dye on the one hand and the uneven distribution of the fibers on the other hand cause that made of several plastic components, dyed or printed nonwoven fabrics of microfibers and / or microfilaments in general have worse color fastness than corresponding fabrics of the same synthetic polymers.
• DE-OS-25 13 533 describes a process for printing and pad dyeing blended fabric.
• US Pat. No. 3,081,141 discloses a dyeing process for fabrics and nonwovens, in which first the dye components are applied separately to the substrate to be dyed and subsequently the dye is produced in situ on the substrate.
• the object of the present invention was therefore to select a suitable class of dyes, which allows the dyeing and / or printing of such nonwoven fabrics of different plastic components with only one class of dyes and thus a dyed and / or printed nonwoven fabric of ungrounded and / or at least partially split microfibers and / or microfilaments of synthetic polymers containing at least one polyester component and at least one polyamide component and optionally at least one polyurethane component to provide, which is characterized by good to very good color fastness, especially washing, welding, water and light and good rub fastness ,
• This object has been achieved by the provision of a dyed and / or printed nonwoven fabric made of unsplit and / or at least partially split microfibers and / or microfilaments of synthetic polymers containing at least one polyester component and at least one polyamide component and optionally at least one polyurethane component having at least one on the Nonwoven produced azo dye, a so-called development dye, dyed and / or printed.
• the nonwoven used is a staple fiber nonwoven or a spunbonded nonwoven, preferably a spunbond nonwoven, of un-split and / or at least partially split microfibers and / or microfilaments.
• the production of corresponding nonwovens can be carried out by customary methods known to the person skilled in the art, as described, for example, in Dr.-Ing. Helmut Jörder, "nonwovens textiles (nonwovens)", avr textbook, P. Keppler Verlag KG, Heusenstamm 1977, pages 13 to 20 are described.
• the production of corresponding spunbonded nonwovens preferably takes place by processes as described in EP 0 814 188.
• the basis weight of the nonwoven fabric used for coloring may vary over a wide range.
• the basis weight of the nonwoven fabric is preferably from 15 to 400 g / m 2 , particularly preferably from 50 to 350 g / m 2 and very particularly preferably from 80 to 200 g / m 2 .
• a preparation of microfibers or microfilaments containing at least one polyester component and at least one polyamide component and optionally at least one polyurethane component is likewise described in EP 0 814 188, the preparation preferably being carried out by this process.
• the nonwoven fabric used for coloring consists of unpartified and / or at least partially split microfibers and / or microfilaments of at least one polyester component and at least one polyamide component, these two components preferably in a quantitative ratio of 5 to 95% by weight.
• % of at least one polyester component and 95 to 5% by weight at least one polyamide component particularly preferably from 15 to 85% by weight of at least one polyester component and from 85 to 15% by weight of at least one polyamide component and very particularly preferably from 30 to 70% by weight of at least one polyester component and from 70 to 30% by weight at least one polyamide component is present.
• the titre of the microfibers and / or microfilaments present in the nonwoven fabric is preferably ⁇ 1 dtex, particularly preferably 0.02 to 0.95 dtex, very particularly preferably 0.05 to 0.85 dtex and most preferably 0.1 to 0, 5 dtex.
• the polyamide component of the nonwoven fabric is preferably polyamide 6, polyamide 66 or polyamide 11.
• the polyester component of the nonwoven fabric preferably consists of polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polylactic acid, mixtures thereof or copolyesters.
• Corresponding copolyesters can be obtained either by partial replacement of the acid component and / or the diol component in the preparation of the polyester, such as in Büttner "basic modified polyester fibers" in "The Applied Macromolecular Chemistry” 40/41, 1974, pages 57 70 (No. 593) or GG Kulkarni, Colourage, 21 August 1986, pages 30 to 33.
• the corresponding literature descriptions are hereby incorporated by reference and are considered part of the disclosure. If the polyester component is a polyester based on lactic acid, its preparation is described in EP 1 091 028.
• the azo dye is formed on the nonwoven fabric by coupling at least one dye developer component with at least one fast dye salt or at least one true dye base, after its diazotization, as described below.
• Another object of the present invention is a process for dyeing and / or printing the nonwoven fabric described above by treating this nonwoven fabric with at least one dye developer component at a temperature of ⁇ 90 ° C and at least one Bachfärbesalz or at least one Mattfärbebase and the dye developer component with the vomfärbesalz or the Mattfärbebase, after the diazotization, is coupled on the nonwoven fabric.
• the dye developer component and the fast dye salt or fast dye base may be applied to the nonwoven fabric either simultaneously or sequentially. Preferably, these components are applied successively to the nonwoven fabric.
• a fast dye base is used for coupling with the dye developer component, it must be diazotized prior to coupling, i. be converted into their corresponding diazonium salt.
• This diazotization can be carried out by customary methods known to the person skilled in the art. Preferably, it is carried out by reacting the respective true base with an inorganic nitrite, preferably sodium nitrite, in the presence of an organic or inorganic acid, preferably hydrochloric acid.
• a fast dyeing salt is particularly preferably used in the process according to the invention since diazotization prior to coupling is not required here.
• the dye developer component may preferably be selected from the group consisting of arylamides of aromatic hydroxycarboxylic acids, arylamides of keto acids and hydroxynaphthyl ketones.
• Preferred arylamides of aromatic hydroxycarboxylic acids are amides of 2-hydroxy-3-naphthoic acid, more preferably 2-hydroxy-3-naphthoic acid anilide, 2-hydroxy-3-naphthoic acid o-toluidide, 2-hydroxy-3-naphthoic acid 4, 6-dimethoxy-3-chloroanilide, 2-hydroxy-3-naphthoic acid a-naphthylamide, [bis-2-hydroxy-3-naphthoic acid] dianiside, amides of anthracene, particularly preferably 2-hydroxy-3-anthracene-carboxylic acid o-toluidide, amides of carbazole, more preferably 2-hydroxycarbazole-3-carboxylic acid -4'-choranilide or amides of diphenylene oxide, more preferably 3-hydroxy-2-diphenyl-2-carboxylic acid 2 ', 5'-dimethoxy-
• the arylamide of a keto acid is preferably diacetacetic acid o-toluidide or terephthaloyl bisacetic acid bis [2-methoxy-4-chloro-5-methyl-anilide.
• Preferred fastness bases can be selected from the group consisting of o-chloroaniline, o-nitroaniline, m-nitro-p-toluidine, 4-diethylsulfamido-1-amino-1-methoxy-benzene, 4-chloro-2-amino-diphenyl ether, ⁇ -aminoanthraquinone, 4-amino-3-methoxy-azabenzene, 4-amino-1-benzoylamino-3-methoxy-6-methylbenzene, o-dianisidine, 4-amino-4'-methoxy-diphenylamine, 3.5 Bis-trifluoromethylaniline and 3-fluorosulfonylaniline.
• the nonwoven fabric used for coloring is treated with at least one dye developer component according to the exhaust process, optionally with the addition of carriers.
• both the treatment temperature and the duration of treatment can vary over a wide range.
• the treatment temperature is 90 to 150 ° C, more preferably 100 to 130 ° C.
• the treatment time is preferably 10 to 180 minutes, more preferably 20 to 120 minutes, and most preferably 25 to 60 minutes.
• the nonwoven fabric used for coloring is treated with at least one dye developer component according to the padding process, to which optionally an intermediate drying is carried out can connect.
• the duration of the intermediate drying is preferably 30 seconds to 10 minutes, more preferably 2 to 5 minutes.
• the temperature in the intermediate drying is preferably 80 to 180 ° C, particularly preferably 100 to 150 ° C.
• the intermediate drying may preferably be followed by a heat treatment, optionally in the presence of steam. The temperature and duration of the heat treatment can vary over a wide range.
• the temperature in the heat treatment in the presence of water vapor is preferably 100 to 130 ° C, particularly preferably 102 to 120 ° C. If the treatment is carried out without steam, the treatment temperature is preferably 150 to 240 ° C, particularly preferably 175 to 210 ° C.
• the duration of the heat treatment is preferably 15 seconds to 60 minutes, more preferably 2 to 45 minutes, and most preferably 5 to 30 minutes.
• the dye developer component, vomerfärbebasen and vomerbrasalze are each used in the form of an aqueous solution.
• the subsequent coupling of these components to an azo dye on the nonwoven fabric is also preferably carried out in aqueous solution.
• the treatment of the nonwoven fabric with at least one vomfärbesalz or at least one vomfärbebase and the coupling of the dye developer component with the vomfärbesalz or Echtfetzbebase, after the diazotization, on the nonwoven fabric may also preferably by the exhaust or the padding process, optionally with intermediate drying and optionally subsequent heat treatment, if necessary in the presence of water vapor, wherein both the treatment time and the treatment temperature may vary depending on the particular method.
• the temperature is preferably -10 to 130 ° C, more preferably 0 to 60 ° C and most preferably 5 to 30 ° C.
• the treatment time in the exhaustion process is preferably 5 to 120 minutes, more preferably 10 to 60 minutes and most preferably 15 to 45 minutes.
• the temperature is preferably -10 to 60 ° C, particularly preferably 0 to 30 ° C.
• the treatment time in the padding process is usually very short and is preferably not more than 10 seconds.
• nonwoven fabric is printed with one or more of the abovementioned development dyes, this can be done by customary printing processes known to the person skilled in the art.
• the dye developer component is preferably first applied to the nonwoven fabric by one of the above-mentioned dyeing methods or printed by means of a customary process known to the person skilled in the art.
• the respective Echtfärbebase or Echtfärbesalz optionally using a template to produce a pattern on the nonwoven fabric is printed.
• the printing of the nonwoven fabric according to a direct printing method, preferably according to a film printing method, more preferably according to the rotary film or flat film printing method, or according to the ink-jet method.
• the printing of the nonwoven fabric may preferably be followed by intermediate drying and, if appropriate, subsequent heat treatment, if appropriate in the presence of steam, which in each case may preferably be carried out under the conditions indicated above.
• the printing of the described nonwoven fabric using printing pastes can be prepared by conventional methods known in the art and in addition to the respective dye developer component or Echtfärbebase or Echtfärbesalzes also contain other conventional auxiliaries, which can be preferably selected from the group from thickeners, crosslinkers, plasticizers, defoamers, wetting agents and moisture promoters. Furthermore, it is also possible from the Echtfärbebase to generate the corresponding diazonium salt in the printing paste by diazotization.
• the printing pastes contain, in addition to the respective dye developer component or the Echtfärbebase or Echtfärbesalzes as another ingredient only one or more thickening agents, which can be preferably selected from the group of natural or synthetic thickeners.
• Natural thickeners may preferably be selected from the group comprising optionally partially degraded starch, vegetable gums, locust bean gum, etherified polysaccharides and alginates.
• Synthetic thickeners may preferably be selected from the group of water-soluble carboxyl group-containing polymers, which may preferably consist of (meth) acrylic acid and / or maleic acid hydride.
• the coupling of the components to the azo dye can be followed by aftertreatment of the nonwoven fabric by heating or treatment with water vapor, even at elevated temperature.
• the treatment with steam - the post-fuming - is preferably carried out at a temperature of 100 to 130 ° C, preferably at 102 to 120 ° C, the heating (post-fixing) at a temperature of 150 to 240 ° C, preferably at 175 to 210 ° C.
• the duration of the treatment may in each case preferably be 10 seconds to 30 minutes, particularly preferably 30 seconds to 15 minutes, very particularly preferably 2 minutes to 10 minutes.
• the dyeing and / or printing of the nonwoven fabric may be followed by a cleaning of the nonwoven fabric, preferably by rinsing with water or an aqueous solution containing sodium hydrosulfite and sodium hydroxide, even at elevated temperature, and / or optionally soaps the nonwoven fabric, the conditions of course so too choose that the applied azo dye is not completely destroyed again.
• a treatment of the dyed and / or printed nonwoven fabric with a color-intensifying aid can be carried out after dyeing and / or printing in the course of the finishing.
• color-intensifying agents all chemicals are considered which can measure the refraction angle of the light on the surface of the nonwoven fabric, e.g. by forming a film, so that the calculation index between the air and the nonwoven fabric has a value greater than 1.
• Suitable chemicals are, for example, polyacrylates, polyurethanes and polysiloxanes which are commercially available, for example, under the name Badena® Eco 282, Finistrol® KSE-D, Baypret® USV and Arristan® 64. If the film formed consists of chemicals which protect the dyes also against external influences, such. Badena® Eco 282, at the same time an improvement in color fastness can be achieved.
• the color-intensifying aid can be applied by customary methods known to the person skilled in the art.
• the color-intensifying aid may preferably be applied to the textile material at a pH of from 2 to 12, preferably from 3 to 9, particularly preferably from 4 to 8, using the padding process and at temperatures of from 40 to 180 ° C., preferably from 100 to 160 ° C for a period of 1 second to 120 minutes, preferably from 5 seconds to 45 minutes, more preferably from 30 Seconds can be fixed up to 2 minutes.
• the particular amount of color-enhancing agent that is suitable can vary and can be determined by the person skilled in the art by simple preliminary tests. For Badena® Eco 282, the suitable amount is preferably 10 to 100 g / l of liquor, more preferably 20 to 50 g / l of liquor.
• the printed and / or dyed nonwoven fabric according to the invention made of unsplit and / or at least partially split microfibers and / or microfilaments of synthetic polymers comprising at least one polyester component and at least one polyamide component and optionally at least one polyurethane component is characterized by good to very good color fastness, even after heat treatment, in particular by good to very good washing, welding, water and light fastness and good rubbing fastness.
• the nonwoven fabric dyed and / or printed by the method according to the invention is therefore particularly suitable for the production of clothing, home textiles, linings, preferably for luggage, as well as for the production of textile products in the field of medicine and / or hygiene.
• Another object of the present invention is therefore the use of at least one dyed and / or printed nonwoven fabric according to the invention for the production of clothing, as home textiles, as lining materials, preferably linings for luggage, such as e.g. Suitcases or bags, as well as textile material in the field of medicine and / or hygiene.
• the lightfastness of the dyed and / or printed synthetic textile material according to the invention was, according to EN ISO 105 B02, the wash fastness at 40 ° C, even after heat treatment, according to EN ISO 105 C06 A2S, the resistance to water according to EN ISO 104 E01, the resistance to Welding according to EN ISO 104 E04 and resistance to mechanical rubbing in accordance with EN ISO 105 X12.
• a spunbonded nonwoven having a weight per unit area of 100 g / m 2 consisting of partially split microfibers of 70% by weight of polyethylene terephthalate and 30% by weight of nylon 66 having a titre of about 0.15 dtex was extracted by means of an aqueous hydroxynaphthoic acid Primer formulation containing CI Azoic Coupling Component 5 (trade name: Naphtol AS-G, DyStar) and then blended with a true color salt preparation containing CI Azoic Diazo Component 33 (Salt) (trade name: fast-release salt FRN, DyStar), coupled.
• the naphthol was first dissolved by means of cold dissolving method, with 1.4 g of naphthol with 10 ml of a 10 wt .-% - castor oil solution and 5 ml of a 10 wt .-% - sodium hydroxide solution pasted in with 20 ml of 60 ° C warm water containing 0.0175 g of a complexing agent based on trisodium nitrilotriacetate, were poured over.
• 10 g of the spun-bonded nonwoven fabric were then primed with the solution thus obtained at a liquor ratio of 1:20.
• the solution was placed together with the nonwoven fabric in a dyeing cup and heated to 130 ° C at 1.5 ° C / min. After a residence time of 30 min at 130 ° C was cooled at 1.5 ° C / min to 80 ° C and 10 min at a liquor ratio of 1:10 with 199.8 ml of 40 ° C warm water containing 0.2 ml a 32 wt .-% sodium hydroxide solution, 10 g of sodium chloride and 0.1 g of a complexing agent based on trisodium nitrilotriacetat, rinsed.
• the napthol-primed nonwoven fabric was treated in a dyeing machine with this solution at 20 ° C for 30 min and then for 15 min at 70 ° C with a solution containing 1 g / l of sodium carbonate and 0.5 g / l of a dispersant based on an ethoxylated higher alcohol, soaped.
• a spunbonded nonwoven having a basis weight of 100 g / m 2 consisting of partially split microfibers of 70 wt .-% polyethylene terephthalate and 30 wt .-% polyamide 66 with a titer of about 0.15 dtex was primed and rinsed analogously to Example 1 ,
• Example 1 Development with the true color salt preparation according to Example 1 was carried out immediately after priming in the padding process. To this was dissolved 6.92 g of the true color salt preparation with 99 ml of 15 ° C. warm water containing 1 ml of a 7% strength by weight solution of a dispersant based on an ethoxylated higher alcohol and 1 g of sodium acetate. The pH was adjusted to 5 with 60% strength by weight acetic acid. This solution was padded at 20 ° C on the primed, wet nonwoven fabric. The liquor pickup was 100 wt .-%, based on the weight of the nonwoven fabric used. Subsequently, the nonwoven fabric was treated at 20 ° C for 60 seconds with circulating air and soaped as indicated in Example 1.
• a spunbonded nonwoven fabric having a weight per unit area of 100 g / m 2 consisting of partially split microfibers of 70% by weight of polyethylene terephthalate and 30% by weight of polyamide 66 having a titer of about 0.15 dtex was prepared by exhaustion with a liquid hydroxybenzocarbazolecarboxylic acid.
• the primer was carried out by exhaustion at a liquor ratio of 1:20.
• the naphtol-primed nonwoven fabric was treated in a dyeing machine with this solution at 20 ° C for 30 minutes and then for 15 minutes at 70 ° C with a solution containing 1 g / l of sodium carbonate and 0.5 g / l of a dispersant based on an ethoxylated higher alcohol contained, soaped.
• a spunbonded nonwoven fabric having a weight per unit area of 100 g / m 2 consisting of partially split microfibers of 70% by weight of polyethylene terephthalate and 30% by weight of polyamide 66 having a titer of about 0.15 dtex was treated in the padding process with a liquid hydroxybenzocarbazolecarboxylic acid.
• the primed goods were padded with this solution at 20 ° C -
• the liquor pickup was 100 wt .-%, based on the eincuten nonwoven fabric, then 60 seconds was treated with circulating air at 20 ° C, post-fixed at 200 ° C for 180 seconds and as soaped in Example 1.
• a spunbonded nonwoven having a basis weight of 100 g / m 2 consisting of partially split microfibers of 70% by weight of polyethylene terephthalate and 30% by weight of polyamide 66 having a titer of about 0.15 dtex was first treated with Naphtol AS (Dystar). , an aqueous hydroxynaphthoic acid preparation containing CI Azoid Coupling Component 2, as a dye developer component padded. Subsequently, the nonwoven fabric was dried at 140 ° C for 90 seconds.
• a stock paste A was prepared from 500 g of Diagum A8 (BF Goodrich, Diamalt, Barcelona, Spain), a locust bean thickener, 491 g of water and 9 g of sodium nitrite, and a stock paste B of 500 g of Diagum A8, 440 g of water and 60 g g phosphoric acid produced.
• a printing paste 30 g of Echtbase Echtrot B (Dystar), C.I. Azoic Diazo Component 5 diluted with 70 g of water, stirred into 600 g of stock paste A and admixed with 300 g of stock paste B.
• the paste thus obtained was then stirred for 5 minutes, so that a diazotization of the true base was carried out.
• the thus-obtained paste was then screen-printed on the nonwoven fabric previously padded with the dye developer component using a stencil.
• To remove the uncoupled Echtbase the nonwoven fabric was then treated for 30 minutes at a temperature of 90 ° C with sodium dithionite in aqueous sodium hydroxide solution and then soaped with Calgon T and soda.
• a spunbonded nonwoven having a weight per unit area of 100 g / m 2 consisting of partially split microfibers of 70% by weight of polyethylene terephthalate and 30% by weight of polyamide 66 having a titer of about 0.15 dtex was initially treated with an aqueous solution of naphthol AS (Dystar), a hydroxynaphthoic acid preparation containing CI Azoic Coupling Component 2, padded as a dye developer component. Subsequently, the nonwoven fabric was dried at 140 ° C for 90 seconds.
• the thus pretreated nonwoven fabric was prepared by using a stencil with a paste of 200 g of aluminum sulfate monohydrate, 200 g of water and 600 g Printed cellulose ether and then dried for 3 minutes at a temperature of 120 ° C.
• the nonwoven fabric was then reductively cleaned by means of sodium hydrosulfite and sodium hydroxide solution, rinsed with hot running water and then boiled with a solution containing 1 g / l Naphtopon E (Bayer AG, Germany), Calgon T (Benkieser) and soda.
• a spunbonded nonwoven having a weight per unit area of 100 g / m 2 consisting of partially split microfibers of 70% by weight of polyethylene terephthalate and 30% by weight of polyamide 66 having a titer of about 0.15 dtex was initially treated with an aqueous solution of naphthol AS (Dystar), a hydroxynaphthoic acid preparation containing CI Azoic Coupling Component 2, padded as a dye developer component. Subsequently, the nonwoven fabric was dried at 140 ° C for 90 seconds.
• the thus pretreated was printed with a paste of 60 g Echtorgangesalz GGD, 3 g of the dispersant Dispersogen ASN, 317 g of water, 70 g of aluminum sulfate monohydrate, 550 g Tylose H 300 and then dried for 3 minutes at a temperature of 120 ° C. ,
• the nonwoven fabric was then reductively cleaned with the aid of sodium hydrosulfite and sodium hydroxide solution, rinsed with hot flowing water and then boiled with a solution containing 1 g / l Naphtopon E (Bayer AG), Calgon T (Benkieser) and soda.
• Table 1 ⁇ / b>
• Example 1 Color: yellow
• Example 2 Color: yellow
• Example 3 Color: greyish brown

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• 2001
  • 2001-07-24 DE DE10135940A patent/DE10135940B4/de not_active Expired - Fee Related
• 2002
  • 2002-06-28 WO PCT/EP2002/007150 patent/WO2003014464A1/de not_active Application Discontinuation
  • 2002-06-28 EP EP02747447A patent/EP1412578B1/de not_active Expired - Lifetime
  • 2002-06-28 US US10/484,642 patent/US20040194234A1/en not_active Abandoned
  • 2002-06-28 DE DE50205529T patent/DE50205529D1/de not_active Expired - Lifetime
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