EP2642023B1 - A process of printing fabrics and its products - Google Patents

A process of printing fabrics and its products Download PDF

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Publication number
EP2642023B1
EP2642023B1 EP12002060.7A EP12002060A EP2642023B1 EP 2642023 B1 EP2642023 B1 EP 2642023B1 EP 12002060 A EP12002060 A EP 12002060A EP 2642023 B1 EP2642023 B1 EP 2642023B1
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EP
European Patent Office
Prior art keywords
fabric
printed
composition
garment
colour
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12002060.7A
Other languages
German (de)
French (fr)
Other versions
EP2642023A1 (en
Inventor
Kenan Loyan
Murat Dogan
Aga Mirza Hamidov
Leyla Zengi
Erman Karadag
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanko Tekstil Isletmeleri Sanayi ve Ticaret AS
Original Assignee
Sanko Tekstil Isletmeleri Sanayi ve Ticaret AS
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Application filed by Sanko Tekstil Isletmeleri Sanayi ve Ticaret AS filed Critical Sanko Tekstil Isletmeleri Sanayi ve Ticaret AS
Priority to DK12002060T priority Critical patent/DK2642023T3/en
Priority to EP12002060.7A priority patent/EP2642023B1/en
Priority to ES12002060T priority patent/ES2754030T3/en
Priority to PL12002060T priority patent/PL2642023T3/en
Priority to PT120020607T priority patent/PT2642023T/en
Publication of EP2642023A1 publication Critical patent/EP2642023A1/en
Application granted granted Critical
Publication of EP2642023B1 publication Critical patent/EP2642023B1/en
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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
    • 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
    • D06P1/22—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 vat dyestuffs including indigo
    • 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
    • D06P1/30—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 sulfur dyes
    • 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
    • D06P1/30—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 sulfur dyes
    • D06P1/305—SO3H-groups containing dyes
    • 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
    • D06P1/38—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 reactive dyes
    • 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
    • D06P1/38—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 reactive dyes
    • D06P1/382—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 reactive dyes reactive group directly attached to heterocyclic group
    • 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
    • D06P1/38—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 reactive dyes
    • D06P1/384—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 reactive dyes reactive group not directly attached to heterocyclic group
    • 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
    • D06P1/673—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
    • 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
    • D06P3/003—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated using vat or sulfur dyes
    • 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
    • D06P3/008—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated using reactive dyes
    • 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
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • D06P3/6025—Natural or regenerated cellulose using vat or sulfur dyes
    • 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
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • D06P3/62—Natural or regenerated cellulose using direct dyes
    • 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
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • D06P3/66—Natural or regenerated cellulose using reactive dyes
    • 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
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • D06P3/66—Natural or regenerated cellulose using reactive dyes
    • D06P3/663—Natural or regenerated cellulose using reactive dyes reactive group directly attached to heterocyclic group
    • 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
    • D06P3/58—Material containing hydroxyl groups
    • D06P3/60—Natural or regenerated cellulose
    • D06P3/66—Natural or regenerated cellulose using reactive dyes
    • D06P3/666—Natural or regenerated cellulose using reactive dyes reactive group not directly attached to heterocyclic group
    • 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 a process of printing fabrics and to the printed fabric products thus obtained.
  • Printing fabric is a process by which a colour is imparted to selected portions of a textile fabric; there are known several different methods of printing fabric, such as screen printing, rotation printing, jet printing; different dyes and pigments can be applied to the fabric, such as reactive dyes, discharge dyes etcetera.
  • Fabric can be printed as a flat piece or as a finished (or almost finished) garment.
  • fabric printing a minimum amount of fabric is required for printing a colour.
  • Printing a garment rather than printing a flat fabric is preferred by the clothes producers because it makes it possible to decide for the colour of printing to be done at the last minute.
  • printing a garment is much more difficult and more expensive than printing a flat fabric piece.
  • Another problem with printing fabric is that in general the printed portions has a new look that does not agree with the faded look of the rest of the garment.
  • the process should be useful in particular to provide printed patterns on a cotton denim fabric with a faded, i.e. worn, look.
  • a printing method in which a fabric is printed with a composition comprising 4-40% by weight, preferably to 4 to 25% by weight of at least one strong base MOH, where M is an alkali metal, water and a thickener, said composition being not suitable to provide a color on said fabric, and treating the printed fabric with a dye that is suitable to react with said base to provide a coloured printed area corresponding to the area where the basic formulation was applied.
  • the composition is free of amines and of compounds having amino groups; preferably the composition is not coloured. The colour is imparted at least to the area where the composition containing the base MOH has been applied.
  • Strong bases are e.g. KOH, CsOH, NaOH, LiOH, RbOH; preferably M is Na or K. In the following description reference will be made to Na and K; the combination of these two metals with the other features of the invention is expressly disclosed with this reference.
  • the dye is preferably in the form of a solution, e.g. an aqueous bath.
  • the printed fabric, not yet treated with the dye, is dried before the subsequent step of imparting a colour.
  • the fabric printed with the non-coloured composition is heated to a temperature of at least 90 °C, preferably in the range of 130°C to 220°C.
  • the fabric to be printed with the MOH formulation is not yet coloured and the bath gives a colour both to the fabric and to the printed area with different intensity. This makes it possible to obtain a worn look without having to use the other standard methods or with a limited use to said methods.
  • Any type of textile fabric that is resistant to the basic composition of the invention can be used. In the case of denim fabrics, suitable fabrics have a weight in the range of 50-500 g/m 2 .
  • the dye is provided in a known way in an aqueous dying bath and is selected from dyes suitable to react with and be "fixed" on the printed areas of the fabric more than on the remaining parts of the fabric.
  • concentration of the dye in the bath is such as to avoid imparting an excessive colouring to the fabric and to allow to show the difference in colouring of the printed areas and the remaining fabric.
  • a suitable concentration of the dye in the dyeing bath is 0,1% - 10% by weight on the weight of the fabric.
  • Suitable dyes are reactive dyes, sulphur dyes, direct dyes and vat dyes.
  • a composition suitable for the process is a composition that comprises 4% to 40% by weight of at least one strong base MOH, where M is an alkali metal, water and a thickener, has a viscosity suitable to be printed on fabric and is free from amines and amino groups in general.
  • the strong base is NaOH or KOH.
  • Suitable printing machines are rotary screen and flatbed screen devices.
  • Suitable concentrated solutions of MOH for preparing the invention composition are those having a concentration within the range of 8 to 48 Be (Baume degrees), preferably 35 to 45 Be, corresponding to ranges of 1 to 10 moles/litre and 5 to 8 moles/litre, respectively.
  • the amount of MOH solution in the composition is within the range of 30% to 70% by weight of the final composition.
  • the amount of thickener is enough to reach a viscosity suitable for the composition to be used on a printing machine for textile printing; suitable viscosities are in the range of 5 to 40 dPa.s.
  • Suitable thickeners are thickeners for aqueous solutions that are resistant to highly basic conditions such as in the invention composition.
  • An example of suitable thickener is anionic pregelatinized carboxymethylated starch which is able to resist to alkali solutions.
  • the amount of MOH-containing composition applied to the fabric is within the range of 50 to 500 g/m 2 , preferably within 70 to 150 g/m 2 .
  • the fabric is generally a flat piece of fabric but it can also be in the form of a part of a garment.
  • the invention has several advantages over the prior art. It makes it possible to prepare a fabric with a pre-printed pattern and to subsequently decide what will be the final colour to be imparted to the fabric/pre-printed area. Another advantage is that by avoiding the use of amines and molecules having amino groups in general, the final printed coloured area will have a worn look as the rest of the fabric.
  • a denim fabric of about 200 g/m 2 was screen printed with a composition according to example 1.
  • the printed fabric shows no difference in the colours of the printed area and of the non-printed area.
  • the fabric was dried at 145°C for 1 minute.
  • the dry fabric was immersed in a bath containing the following compounds;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Coloring (AREA)

Description

  • The present invention relates to a process of printing fabrics and to the printed fabric products thus obtained.
  • Printing fabric is a process by which a colour is imparted to selected portions of a textile fabric; there are known several different methods of printing fabric, such as screen printing, rotation printing, jet printing; different dyes and pigments can be applied to the fabric, such as reactive dyes, discharge dyes etcetera.
  • Fabric can be printed as a flat piece or as a finished (or almost finished) garment. In fabric printing a minimum amount of fabric is required for printing a colour. Printing a garment rather than printing a flat fabric, is preferred by the clothes producers because it makes it possible to decide for the colour of printing to be done at the last minute. However, printing a garment is much more difficult and more expensive than printing a flat fabric piece.
  • Another problem with printing fabric is that in general the printed portions has a new look that does not agree with the faded look of the rest of the garment.
  • It is an aim of the present invention to solve the above problems and to provide a process of printing fabrics that is easy and not expensive and that could be used to provide on the fabric, namely a cotton denim fabric, printed patterns of the required colour in a short time.
    The process should be useful in particular to provide printed patterns on a cotton denim fabric with a faded, i.e. worn, look.
  • The above aim is reached by means of the present invention that provides a printing method according to claim 1, in which a fabric is printed with a composition comprising 4-40% by weight, preferably to 4 to 25% by weight of at least one strong base MOH, where M is an alkali metal, water and a thickener, said composition being not suitable to provide a color on said fabric, and treating the printed fabric with a dye that is suitable to react with said base to provide a coloured printed area corresponding to the area where the basic formulation was applied. The composition is free of amines and of compounds having amino groups; preferably the composition is not coloured. The colour is imparted at least to the area where the composition containing the base MOH has been applied.
    Strong bases are e.g. KOH, CsOH, NaOH, LiOH, RbOH; preferably M is Na or K. In the following description reference will be made to Na and K; the combination of these two metals with the other features of the invention is expressly disclosed with this reference.
  • The dye is preferably in the form of a solution, e.g. an aqueous bath.
  • The printed fabric, not yet treated with the dye, is dried before the subsequent step of imparting a colour. Before the step of imparting a colour to the fabric, the fabric printed with the non-coloured composition is heated to a temperature of at least 90 °C, preferably in the range of 130°C to 220°C.
  • The fabric to be printed with the MOH formulation is not yet coloured and the bath gives a colour both to the fabric and to the printed area with different intensity. This makes it possible to obtain a worn look without having to use the other standard methods or with a limited use to said methods. Any type of textile fabric that is resistant to the basic composition of the invention can be used. In the case of denim fabrics, suitable fabrics have a weight in the range of 50-500 g/m2.
  • The dye is provided in a known way in an aqueous dying bath and is selected from dyes suitable to react with and be "fixed" on the printed areas of the fabric more than on the remaining parts of the fabric. The concentration of the dye in the bath is such as to avoid imparting an excessive colouring to the fabric and to allow to show the difference in colouring of the printed areas and the remaining fabric. A suitable concentration of the dye in the dyeing bath is 0,1% - 10% by weight on the weight of the fabric.
  • Suitable dyes are reactive dyes, sulphur dyes, direct dyes and vat dyes.
  • A composition suitable for the process is a composition that comprises 4% to 40% by weight of at least one strong base MOH, where M is an alkali metal, water and a thickener, has a viscosity suitable to be printed on fabric and is free from amines and amino groups in general.
  • Preferably, the strong base is NaOH or KOH.
  • To prepare the NaOH and/or KOH composition, water, a concentrated solution of MOH are mixed together, then a thickener is added to reach the viscosity required for the printing step on a known printing machine.
  • Suitable printing machines are rotary screen and flatbed screen devices.
    Suitable concentrated solutions of MOH for preparing the invention composition are those having a concentration within the range of 8 to 48 Be (Baume degrees), preferably 35 to 45 Be, corresponding to ranges of 1 to 10 moles/litre and 5 to 8 moles/litre, respectively.
  • In general, the amount of MOH solution in the composition is within the range of 30% to 70% by weight of the final composition. The amount of thickener is enough to reach a viscosity suitable for the composition to be used on a printing machine for textile printing; suitable viscosities are in the range of 5 to 40 dPa.s. Suitable thickeners are thickeners for aqueous solutions that are resistant to highly basic conditions such as in the invention composition. An example of suitable thickener is anionic pregelatinized carboxymethylated starch which is able to resist to alkali solutions.
  • The amount of MOH-containing composition applied to the fabric is within the range of 50 to 500 g/m2, preferably within 70 to 150 g/m2. The fabric is generally a flat piece of fabric but it can also be in the form of a part of a garment.
  • It is therefore a further object of the invention a garment according to claim 10.
  • The invention has several advantages over the prior art. It makes it possible to prepare a fabric with a pre-printed pattern and to subsequently decide what will be the final colour to be imparted to the fabric/pre-printed area. Another advantage is that by avoiding the use of amines and molecules having amino groups in general, the final printed coloured area will have a worn look as the rest of the fabric.
  • The invention will now be further described with reference to the following non-limiting example.
    • EXAMPLE 1 Preparation of a base composition.
  • 528 g of an NaOH concentrated solution having 38 Be were added to 444,5 g H2O and mixed with 27,5 g of anionic pregelatinized carboxymethylated starch as a thickener. The composition was thoroughly stirred and a viscosity of 30 dPa.s(decipascal-seconds) was reached.
    • EXAMPLE 2 Printing of a fabric.
  • A denim fabric of about 200 g/m2 was screen printed with a composition according to example 1. The printed fabric shows no difference in the colours of the printed area and of the non-printed area.
    The fabric was dried at 145°C for 1 minute.
    The dry fabric was immersed in a bath containing the following compounds;
    • Dye: solution A colour beige, 20 ml.
      Water up to 1 It.
    • Dye solution A is obtained by combining the following dyes:
      • 8,4 g solar brun RLNI
      • 5,8 g indosol yellow SFGL
    The dry fabric is dyed in a bath containing 20 ml of the prepared dye solution A per litre of water at 60°C for 20 minutes.
    The treated fabric was then removed from the bath and dried. The area previously printed with the basic composition of example 1 is coloured in dark beige while the remaining fabric is light in colour.

Claims (10)

  1. A method for printing a fabric, characterized in comprising the following steps:
    a) applying to selected areas of a fabric a composition comprising
    - 4% to 40% by weight of at least one strong base MOH, where M is an alkali metal;
    - water and a thickener;
    said composition having a viscosity suitable to be printed on said fabric and being free from amines and amino groups;
    a1) drying said printed fabric; and
    b) treating the dry, printed, fabric with a dye that is suitable to react with said base to impart a colour on said fabric area where said composition was applied, said dye becoming fixed on the said printed areas of the fabric more than on the remaining parts of the fabric.
  2. A method according to claim 1, wherein said fabric is part of a garment.
  3. A method according to claims 1 or 2, wherein said printed fabric is part of a garment before said step b).
  4. A method according to any previous claim, wherein said printed fabric is heated to a temperature of at least 90°C, preferably in the range of 130°C to 220°C before said step of imparting a colour.
  5. A method according to any previous claim, wherein said dye is provided in a bath and is selected from reactive, sulphur, direct and vat dyes.
  6. A method according to any previous claim, wherein M is Na or K.
  7. A method according to claim 6, wherein said base composition is obtained from a solution of NaOH having a concentration within the range of 8 to 48 Be, preferably 35 to 45 Be.
  8. A method according to claim 7, wherein the amount of MOH solution is within the range of 30% to 70% by weight of the final composition.
  9. A method according to any previous claim, wherein the amount of said MOH-containing composition applied to said fabric is within the range of 30 to 500 g/m2, preferably within 40 to 250 g/m2.
  10. A printed dry garment as obtainable through a process according to step a1) of claim 1 and any depending claim, said garment including an area comprising a composition free from amines and amino groups and comprising at least one strong base MOH, where M is an alkali metal, and a thickener, the printed garment further comprising an additional colour derived from step b) of claim 1, whereby said dye is fixed on the said printed areas of the fabric more than on the remaining parts of the fabric, so that a colour is provided on both the fabric and the printed area with different intensity.
EP12002060.7A 2012-03-23 2012-03-23 A process of printing fabrics and its products Active EP2642023B1 (en)

Priority Applications (5)

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DK12002060T DK2642023T3 (en) 2012-03-23 2012-03-23 PROCEDURE FOR PRINTING MATERIALS AND PRODUCTS THEREOF
EP12002060.7A EP2642023B1 (en) 2012-03-23 2012-03-23 A process of printing fabrics and its products
ES12002060T ES2754030T3 (en) 2012-03-23 2012-03-23 Procedure to print fabrics and their products
PL12002060T PL2642023T3 (en) 2012-03-23 2012-03-23 A process of printing fabrics and its products
PT120020607T PT2642023T (en) 2012-03-23 2012-03-23 A process of printing fabrics and its products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12002060.7A EP2642023B1 (en) 2012-03-23 2012-03-23 A process of printing fabrics and its products

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EP2642023A1 EP2642023A1 (en) 2013-09-25
EP2642023B1 true EP2642023B1 (en) 2019-08-14

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DK (1) DK2642023T3 (en)
ES (1) ES2754030T3 (en)
PL (1) PL2642023T3 (en)
PT (1) PT2642023T (en)

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CN106337241B (en) * 2016-10-14 2018-02-06 上海阪神服装进出口有限公司 The preparation method of color-changing printing imitation jean

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JPS5488376A (en) * 1977-12-19 1979-07-13 Takeni Senka Kk Dark and light dyeing of cotton mat
DE3121043A1 (en) * 1980-06-04 1982-03-11 Sandoz-Patent-GmbH, 7850 Lörrach Process for printing cellulose fibres with reactive dyes
DE4306432A1 (en) * 1993-03-02 1994-09-08 Hoechst Ag Process for printing and dyeing textiles (reverse reserve printing)
JP2001293859A (en) * 2000-04-14 2001-10-23 Susumu Saito Method for sticking ink jet print with alkaline paste

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PL2642023T3 (en) 2020-01-31
DK2642023T3 (en) 2019-11-18
PT2642023T (en) 2019-11-20
ES2754030T3 (en) 2020-04-15
EP2642023A1 (en) 2013-09-25

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