Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/70—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
  • D06M15/705—Embossing; Calendering; Pressing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
  • D06M13/402—Amides imides, sulfamic acids
  • D06M13/432—Urea, thiourea or derivatives thereof, e.g. biurets; Urea-inclusion compounds; Dicyanamides; Carbodiimides; Guanidines, e.g. dicyandiamides
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/52—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
  • D06M13/525—Embossing; Calendering; Pressing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
  • D06M15/423—Amino-aldehyde resins
• • 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
• • 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
  • D06P7/00—Dyeing or printing processes combined with mechanical treatment
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
  • D06M2101/02—Natural fibres, other than mineral fibres
  • D06M2101/04—Vegetal fibres
  • D06M2101/06—Vegetal fibres cellulosic

Definitions

• the invention relates to a method for treating fabrics which contain cellulose, in particular in the form of cotton, the fabrics being subjected to embossing and coloring or treatment with cellulose crosslinking agents. It also relates to fabrics that can be produced by such a method.
• cellulose crosslinkers It is also known to provide cellulose-containing fabrics with cellulose crosslinkers by means of wet crosslinking.
• Known cellulose crosslinkers are, for example, in M. Peter and HK Rouette, Basics of Textile Finishing ", 13th revised edition 1989, Deutscher fraverlag, Frankfurt am Main, pages 728 to 730.
• Cellulose crosslinking agents suitable for wet crosslinking are known to the person skilled in the art. These include the reactant crosslinkers, preferably N-methylol derivatives, which can react with the hydroxyl groups of the cellulose by crosslinking the cellulose molecules.
• a strongly acidic product containing a cellulose crosslinking agent suitable for wet crosslinking is applied to the tissue, the tissue is dried to residual moisture and the tissue treated in this way is left for several hours approximately at room temperature or slightly elevated temperature and then neutralized and optionally washed out and dried.
• the process is described in US-A 3409462, DE-A 1469276 and GB-A 1144310. This process leads to a better relation crease angle / tear resistance, better abrasion resistance, better wash resistance of the equipment as well as better easy care properties of the treated fabrics in comparison with a dry crosslinking which is carried out at much higher temperatures.
• the object of the present invention was to develop a process for the production of embossed and optionally dyed fabrics which contain cellulose, in particular in the form of cotton, which allows fabrics to be obtained which do not have the disadvantages mentioned above, ie have good wash resistance of the embossing and, if applicable, good easy-care and anti-crease properties with good mechanical properties such as abrasion and tear resistance.
• embossing of a cellulose-containing tissue could be fixed by wet crosslinking.
• the one possible procedure namely the application of cellulose crosslinking agents to fabric before embossing, as is customary in processes known from the prior art, and wet crosslinking after embossing, cannot be carried out in the method according to the invention because of the low pH (between 1 and 2) of the products to be applied, which is necessary for wet crosslinking, the embossing rollers would be attacked at the usual high embossing temperature.
• the fabrics finished by this method according to the invention have, to a lesser extent, an undesirable gloss for certain purposes in comparison with fabrics produced by the known method of embossing and dry crosslinking.
• the fabrics embossed and finished using this method according to the invention additionally have the advantages of moist crosslinking over dry crosslinking, which are known to the person skilled in the art but have not previously been achievable for embossed fabrics, such as better easy-care and anti-crease properties, better tear and abrasion resistance, etc.
• Suitable for the process are both fabrics consisting exclusively of cellulose and mixed fabrics, for example mixtures of cellulose with polyester or polyamide. Both native and regenerated cellulose, for example viscose, can be used as cellulose. Fabrics with a content of 70 to 100% by weight cellulose are well suited. Fabrics made of cotton are particularly suitable.
• smooth fabric is used for the embossing. These fabrics can be prepared for refinement using known processes such as singeing, desizing, alkaline cooking, leaching, sheet metal, mercerization, treatment with liquid ammonia, dyeing or printing. Normally, the fabrics will not be subjected to treatment with cellulose crosslinking agents before embossing.
• the process according to the invention essentially consists in embossing a cellulose-containing tissue in a first step and dyeing the tissue in a subsequent step, or applying a cellulose crosslinker to the tissue in subsequent steps and carrying out a wet crosslinking.
• the first essential step of the method according to the invention the embossing of the tissues, can take place according to known procedures under the usual conditions. Any pattern is pressed into the fabric using engraved rollers. This can be done by printing with embossing calenders. Pressures from 10 to 120 tons are usual, pressures from 50 to 80 tons are particularly suitable. The specification of the pressure in tons is common for calenders. It is not possible to specify the pressure in a generally customary unit, i.e. force / area unit (e.g.
• the steel rollers bearing the sample are heated by gas, electricity or high pressure steam. Temperatures of 110 to 230 ° C are usual, particularly suitable temperatures of 150 to 230 ° C, particularly preferably temperatures of 190 to 220 ° C.
• the second essential step of the method according to the invention takes place after the embossing, but not necessarily immediately thereafter, and can consist in dyeing the embossed fabric.
• the dyeing of the fabrics can be carried out using the dyes and dyeing processes known for fabrics containing cellulose. These are for example in M. Peter and HK Rouette, Fundamentals of textile finishing ", 13th revised edition 1989, Deutscher fraverlag, Frankfurt am Main, pages 496 to 520. Described are, for example, substantive dyes.
• a particularly well-suited group of dyes for the process according to the invention are the reactive dyes and a particularly good one
• a suitable dyeing process is the cold residence process, in which a liquor with the desired dye is applied to the fabric by means of a pad.
• the padding is carried out according to known methods; after squeezing, the fabrics still contain, for example, 50 to 80% of their own weight in padding liquor.
• concentrations of the liquors used for padding can be varied within a wide range and are determined by the process conditions and the desired color effects.
• the fabric is then left at a temperature of 15 to 50 ° C., preferably 25 to 35 ° C., for several, preferably 6 to 24 hours, essentially without loss of moisture. This can be achieved, for example, by rolling the fabric onto a pillow after the padding and packing it airtight in a film in order to then linger for a certain time at the appropriate temperature.
• the tissue treated in this way is then washed, for example several times in succession with cold, hot and warm water and, if no further treatment of the moist tissue is to be carried out, finally dried.
• the second essential step of the method according to the invention which takes place after the embossing, but not necessarily immediately thereafter, can also be the application of a cellulose crosslinking agent, followed by wet crosslinking.
• Aqueous solutions or dispersions of cellulose crosslinking agents are preferably used for this purpose.
• Conventional, known cellulose crosslinkers are suitable for the process according to the invention, only those which do not lead to crosslinking under the conditions desired for wet crosslinking being out of the question. With the help of a few simple experiments, the person skilled in the art can determine which of the known cellulose crosslinking agents are not suitable in the individual case.
• Reactant crosslinkers preferably N-methylol derivatives, which can react with the hydroxyl groups of the cellulose with crosslinking of the cellulose molecules are particularly suitable.
• Suitable cellulose crosslinking agents known to the person skilled in the art include dimethyloldihydroxyethyleneurea, dimethylolethyleneurea, dimethylolpropyleneurea and their ethers with lower alcohols.
• the cellulose crosslinking agents can be applied to the fabrics by generally known methods, preferably by padding.
• the padding is carried out according to known methods; after squeezing, the fabrics still contain, for example, 50 to 80% of their own weight in padding liquor.
• the concentrations of the liquors used for padding can be varied within a wide range and are determined by the process conditions and the desired effects. The concentrations which are expediently to be used in the individual case can easily be determined by the person skilled in the art by means of a few routine experiments.
• Other possible methods of applying the cellulose crosslinker are spraying, splashing, using foam technology or minimal application.
• a crosslinking catalyst for example consisting of a strong acid or one that is strong in water, also becomes normal acidic compound or a mixture of such compounds, applied.
• the mixture of cellulose crosslinking agent and catalyst applied to the fabric must preferably have a pH between 1 and 2 in order to enable effective moisture crosslinking.
• the fabric is based on a residual moisture content of 4 to 20% by weight, preferably 5.5 to 7.5% by weight, at a temperature of 50 to 130 ° C., preferably 70 to 110 ° C. on the fabric weight, dried.
• the specified values for residual moisture apply to measuring devices with the conductivity principle.
• the fabric treated in this way is subjected to moisture crosslinking.
• the fabric is allowed to remain at a temperature of 10 to 45 ° C., preferably 25 to 35 ° C. for 10 to 35, preferably 16 to 24 hours, essentially without loss of moisture. This can be achieved, for example, by rolling the fabric onto a lump after drying to residual moisture and packing it airtight in a film in order to then linger for a certain time at the appropriate temperature.
• the fabric is finished in a known manner.
• the excess acid must be removed from the tissue.
• the tissue is neutralized, for example with alkaline aqueous solutions, and washed if necessary, e.g. on a wide washing machine and, if no further treatment of the damp tissue is to be carried out, dried.
• the fabrics can also be finished with other conventional textile finishing agents, for example with softening agents, agents for water- and / or oil-repellent finishing, silicone elastomers or flame retardants.
• Suitable products to be used for this purpose are known to the person skilled in the art. Examples include: dispersions containing silicone and / or modified polyethylene as softening agents or for water-repellent finishing, fluorine-containing products for oil and water-repellent finishing, phosphorus-containing products for flame retardant finishing.
• Additional finishing of the fabrics treated according to the method of the invention with other finishing agents is also possible by applying them together with the cellulose crosslinker for wet crosslinking, expediently in the form of an aqueous dispersion or solution.
• a calendar treatment and / or a SANFOR passage can take place.
• a mercerization is carried out according to the usual method for the production of the fabric in order to achieve the known advantages, this must be done before the embossing, since a mercerization after the embossing would lead to a loss of the embossing effects due to the strong swelling.
• the tissue can be treated with liquid ammonia both before and after the embossing.
• the fabric to be finished is first embossed, then subjected to the treatment with liquid ammonia and then dyed or a cellulose crosslinker is applied and finally the fabric is crosslinked moist. If staining is performed, the tissue can be treated with liquid ammonia both before and after staining.
• the treatment of a cellulose-containing fabric with liquid ammonia after embossing and before wet crosslinking is particularly preferred since the process according to the invention can thereby be used to achieve an even further improved wash resistance of the finish. It is also possible to carry out a treatment with liquid ammonia after the previous embossing and then to emboss again, for example with a different pattern, in order to achieve special pattern effects and then to wet-crosslink after applying a cellulose crosslinker.
• the tissue can be treated with liquid ammonia in a known manner and is described, for example, in M.
• the cellulose crosslinking agents can be applied to the fabrics by generally known methods, preferably by padding. For the padding and for other possible methods of applying the cellulose crosslinking agent, the above applies.
• a crosslinking catalyst e.g. consisting of an acid or a water-reacting compound, such as a salt, or a mixture of such compounds, applied.
• the fabric is dried and then crosslinked. After the crosslinking is complete, the fabric is finished in a known manner. First of all, if necessary - depending on the crosslinking method used - the excess acid must be removed from the tissue. For this, the tissue is neutralized, for example with alkaline aqueous solutions, and washed if necessary, e.g. on a wide washer, and dried.
• a particularly preferred embodiment of the invention consists in treating the embossed and colored fabric with cellulose crosslinking agents and then carrying out a dry crosslinking. It is known to provide cellulose-containing fabrics with dry cellulose crosslinking agents. The process is described, for example, in M. Peter and HK Rouette, Basics of textile finishing ", 13th revised edition 1989, Deutscher fraverlag, Frankfurt am Main, pages 727 to 733.
• the tissue treated with the cellulose crosslinker is dried at 110 to 130 ° C. and the dry tissue for 4 to 5 minutes at about Subjected to a condensation of 150 ° C.
• the condensation can also be carried out at a higher temperature, the time must be selected correspondingly shorter. Drying and condensation can also be carried out in one operation, for example on the stenter frame.
• the fabric is gradually in the range from 110 to 180 ° C in a period of 30 to 70 seconds, depending on the desired end temperature, heated.
• Another particularly preferred embodiment of the invention consists in treating the embossed and dyed fabric with cellulose crosslinking agents and then carrying out wet crosslinking.
• the above-mentioned applies to wet crosslinking.
• This method leads to a better crease angle / tear resistance, better abrasion resistance, better wash resistance of the equipment and better Easy-care properties of the treated fabrics compared to dry crosslinking, which is carried out at much higher temperatures.
• the optionally colored fabrics obtained by the process according to the invention which contain cellulose, in particular in the form of cotton, have pleasant aesthetic and usage properties and can be used, inter alia, for articles of clothing and for home textiles such as bed and table linen, upholstery fabrics and curtains.
• Sodium silicate 38 ° Baumé has a concentration of approximately 35% by weight and sodium hydroxide solution 36 ° Baumé has a concentration of approximately 30% by weight.
• the wash resistance in Examples 1-5 was tested with 30 machine washes at 60 ° C.
• the values for the residual moisture were determined using an Aqua-Boy textile moisture meter, type TEM I, from the K.P. Mundinger GmbH, Renningen, which works according to the conductivity principle.

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• 1996
  • 1996-03-19 EP EP96104297A patent/EP0735180A3/fr not_active Withdrawn

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