Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
  • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
  • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
  • D06N3/0025—Rubber threads; Elastomeric fibres; Stretchable, bulked or crimped fibres; Retractable, crimpable fibres; Shrinking or stretching of fibres during manufacture; Obliquely threaded fabrics
  • D06N3/0031—Retractable fibres; Shrinking of fibres during manufacture
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
  • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
  • D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
  • Y10T428/24438—Artificial wood or leather grain surface

Definitions

• the invention relates to grained textile fabrics coated with PUR systems and to a process for their production and the use of such fabrics as decorative starting material.
• coated textile fabrics such as for the production of synthetic leather, known.
• the coating agent is applied to the substrate in one or more layers using the direct coating process or the transfer process.
• the coated textile fabrics can be used e.g. use for the production of outerwear, shoe upper material and lining, baggage and upholstery material as well as for automotive interiors.
• a predetermined pattern is embossed on a coated carrier material by the action of heat and pressure on embossing calenders, embossing plates or also transfer papers. This embossing results in a grain, but with undesirable hardening due to the local compression. In this relatively complex process, only thermoplastic PUR solutions are used, some of which still contain solvent residues that evaporate due to the effects of heat.
• embossed surfaces are created by using grained release materials, especially release papers or silicone matrices.
• release papers especially release papers or silicone matrices.
• the embossments made with release papers are relatively flat and must be specified during the actual coating.
• silicone matrices is very cost-intensive and only acceptable for special effects.
• the object of the present invention was to provide a method for producing a deep scar profile on textile fabrics, without providing the disadvantages described above and thereby obtaining products of high quality in a simple process.
• the invention relates to a process for the production of grained, textile fabrics, characterized in that the fabrics which have residual shrinkage are coated with PU dispersions or solutions and then aftertreated under the action of heat.
• Another object of the invention are grained, coated textile fabrics, obtainable by the process according to the invention.
• Textile fabrics in the sense of the present invention are understood to mean, for example, fabrics and knitted fabrics, bound and unbound nonwovens and microfiber nonwovens. These can be constructed from synthetic, natural fibers and / or their mixtures. Basically, in addition to textiles made of any fibers, all other flexible fabrics are suitable for the method according to the invention, provided that they have residual shrinkage.
• the residual shrinkage of textile materials consisting of fiber blends with a polyester fiber content can be increased by splitting, since this reduces the proportion of polyester fibers and thus the harder part of the fabric.
• PUR dispersions are suitable for the pretreatment of the flat structures by coagulation.
• the PU dispersion consisting of blocked isocyanate groups and at least one polyamine, is precipitated by thermal treatment to form a stable, partially crosslinked polyurethane or gel.
• Coagulation is particularly suitable for the production of films, for coating a wide variety of materials and for partially or completely impregnating
• Nonwovens, knitted fabrics or other fabrics for consolidation are nonwovens, knitted fabrics or other fabrics for consolidation.
• the reactive, post-crosslinkable PUR dispersions are applied, for example, by pouring, spraying, dipping, spraying, splashing, using a doctor blade or roller or in padding, the dispersions being able to be used in liquid or foamed form.
• the dispersions being able to be used in liquid or foamed form.
• the fabrics are held in a tenter during crosslinking and drying in order to prevent the fabric from shrinking prematurely.
• the resulting coagulate is so resistant that the precipitation process can even be carried out in the saponification and grit bath (3% NaOH) after application, whereby in the case of, for example, microfiber nonwovens with a polyester content, this can be saponified and detached at the same time. This leads to particularly soft fabrics with a pleasant grip.
• coated or filled fabrics can also be sanded afterwards and are then particularly soft.
• Mechanical treatment in a tumbler also increases softness.
• the electrolyte coagulation is carried out by immersing the coated substrate in a concentrated salt solution or in acidified water or the like, the binder coagulating due to the high electrolyte content.
• heat-sensitive, non-crosslinkable binders can coagulate by increasing the temperature.
• the pre-cleaned and optionally solidified textile fabrics are then coated in a known manner with the polyurethane systems by the direct or reverse process.
• Coating agents suitable for the process according to the invention are, for example, the one-component and two-component polyurethane systems known in the textile and leather industry, consisting of isocyanate prepolymers and crosslinking agents, which are available on the market as solutions.
• aqueous polyurethane one-component dispersions described in DE-A 4 236 569 which additionally contain structures having a hydrophilizing effect, are suitable for the process according to the invention.
• Solvent-free two-component polyurethane systems consisting of a blocked isocyanate prepolymer and polyamine, which are described, for example, in EP-A 0 784 097, are particularly suitable. These have good wet grip and excellent water resistance. Mixtures of different PUR systems are also suitable.
• the PUR coatings are applied by direct brushing onto the substrate using doctor blades, rollers or wire doctor blades.
• a plurality of lines are applied in succession, but preferably two, so that the total thickness of the coating of base and top coat (s) is 10 to 100 ⁇ m, preferably 20 to 60 ⁇ m.
• a paste which dries up as a microporous layer can also be used as the base coat, as described in DE-A 2,020,153.
• the subsequent top coat protects the entire composite against mechanical stress and abrasion.
• the application of the coating composite from the base and top coat is also possible using the so-called reverse process.
• the reversal process is advantageous when using highly flexible substrates such as knitted fabrics, nonwovens or other non-continuous fabrics.
• the top coat is applied to a grained or non-grained
• the coated fabric can be stored dry and later subjected to post-treatment, in which the desired grain and color can then be given to the article.
• a scar pattern can be designed in a targeted manner by means of a simple pre-embossing of the surface structures coated according to the invention, since in the depressions resulting from the pre-embossing, the effect of heat in the after-treatment forms a correspondingly, but significantly deeper, grain. Without these. Knockout creates a rather randomly grained product in the aftertreatment.
• the fabrics coated by the direct process can optionally be subjected to a slight pre-embossing using an embossing or Gaufrag calender.
• a pre-embossing for the scar design can be created using a grained transfer paper. If unstructured release papers or simple matting calenders are used, there is a random grain during post-treatment.
• the aftertreatment of the coated textile fabrics consists in a subsequent dyeing process or in a stress-free treatment with boiling water.
• a stress-free treatment with boiling water In the case of treatment with hot water, there is also the possibility of adding suitable pigments directly to the coating compositions.
• acid dispersion dyes or metal complex dyes are used to color the coating and the carrier material.
• Low-tension dyeing processes with a long liquor ratio are particularly suitable, as is possible, for example, with the reel runner.
• Metal complex dyes directly or lacquered result in the best wet fastness properties of the PUR coating.
• the sheet-like structures according to the invention can be used as decorative starting material, for example as outer clothing material, shoe upper material and lining, baggage and upholstery material, and as automotive interior material. Examples
• Example 1 (according to the invention):
• Impranil ® VP LS 2333 (Bayer AG, Leverkusen) of 1 - 2.7 weight parts Imprafix ® VP LS 2330 / isopropanol (1: 1).
• the solids content of the dispersion batch is 4 to 8%.
• the textile fabric is padded with the dispersion batch (100% liquor absorption) and then coagulated in a steamer at 98 ° C.
• a fleece e.g. can be split from polyester and polyamide fiber mixtures during or after coagulation to achieve a softer handle.
• the fleece is treated, for example, for about 1 hour in 3% sodium hydroxide solution at the boiling point, the polyester fraction being dissolved out.
• the textile is padded with the dispersion batch (100% absorption of the liquor) and then dried on a tenter.
• a polyester-polyamide fleece can be split analogously to Example 1.
• Top coat 650 parts by weight of Impranil ® DLN dispersion (Bayer AG,
• Impranil ® VP LS 2333 (Bayer AG, Leverkusen)
• Adhesive line 1000 parts by weight of Impranil ® VP LS 2333 (Bayer AG, Leverkusen)
• Imprafix ® VP LS 2330 (Bayer AG, Leverkusen) / isopropanol (1: 1) are thickened with Mirox ® AM (Stockhausen, Krefeld) in the presence of ammonia.
• the coating can be carried out in both the direct and reverse processes.
• the grain of the coating can be structurally specified and deepened or strengthened by the aftertreatment.
• coated textile is only post-treated with hot water, it is also possible to add suitable pigments directly to the coating pastes.
• Polyurethane is generally dyed with metal complex dyes (e.g. complex-forming azo dyes, porphyrins or phthalocyanines) and selected acid and dispersion dyes (e.g. azo, triaryhnethan or anthraquinone dyes).
• metal complex dyes e.g. complex-forming azo dyes, porphyrins or phthalocyanines
• selected acid and dispersion dyes e.g. azo, triaryhnethan or anthraquinone dyes.
• tone-on-tone dyeings with the substrate these can be combined with other dye classes depending on the dyeing method and substrate.
• Isolan S ® dyes (Dystar, Leverkusen) 1: 2 metal complex dyes
• Dye concentration 2 to 4% of the weight of the goods
• the pH when dyeing with acid dyes is adjusted to 5 with acetic acid. It is then neutralized with sodium hydroxide solution and rinsed with demineralized water and then dried tension-free, for example on a hanging loop dryer.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Dispersion Chemistry (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Treatment Of Fiber Materials (AREA)
• Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

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• 2000
  • 2000-08-11 DE DE10039249A patent/DE10039249A1/de not_active Withdrawn
• 2001
  • 2001-07-30 PL PL35985101A patent/PL359851A1/pl not_active Application Discontinuation
  • 2001-07-30 MX MXPA03001244A patent/MXPA03001244A/es not_active Application Discontinuation
  • 2001-07-30 JP JP2002519715A patent/JP2004506817A/ja active Pending
  • 2001-07-30 WO PCT/EP2001/008790 patent/WO2002014596A1/de not_active Application Discontinuation
  • 2001-07-30 HU HU0303752A patent/HUP0303752A2/hu unknown
  • 2001-07-30 CN CN01814011A patent/CN1446281A/zh active Pending
  • 2001-07-30 BR BR0113172-9A patent/BR0113172A/pt not_active Application Discontinuation
  • 2001-07-30 CZ CZ2003404A patent/CZ2003404A3/cs unknown
  • 2001-07-30 CA CA002418841A patent/CA2418841A1/en not_active Abandoned
  • 2001-07-30 IL IL15414501A patent/IL154145A0/xx unknown
  • 2001-07-30 AU AU2001279791A patent/AU2001279791A1/en not_active Abandoned
  • 2001-07-30 KR KR10-2003-7001906A patent/KR20030029817A/ko not_active Application Discontinuation
  • 2001-07-30 EP EP01958034A patent/EP1311720A1/de not_active Withdrawn
  • 2001-08-09 US US09/925,661 patent/US20020114925A1/en not_active Abandoned

Non-Patent Citations (1)

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