EP3392402A1 - Method for manufacturing a dyed textile - Google Patents
Method for manufacturing a dyed textile Download PDFInfo
- Publication number
- EP3392402A1 EP3392402A1 EP18167214.8A EP18167214A EP3392402A1 EP 3392402 A1 EP3392402 A1 EP 3392402A1 EP 18167214 A EP18167214 A EP 18167214A EP 3392402 A1 EP3392402 A1 EP 3392402A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- textile
- dye composition
- weight fraction
- dyeing
- threads
- 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.)
- Granted
Links
- 239000004753 textile Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000004043 dyeing Methods 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920001661 Chitosan Polymers 0.000 claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 14
- 239000010439 graphite Substances 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 8
- 238000009941 weaving Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000007598 dipping method Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 238000005470 impregnation Methods 0.000 claims description 4
- 150000001252 acrylic acid derivatives Chemical class 0.000 claims description 2
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 239000003899 bactericide agent Substances 0.000 claims description 2
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical group [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000003993 interaction Effects 0.000 claims 1
- 239000000975 dye Substances 0.000 description 22
- 239000000243 solution Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 238000009990 desizing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229920002101 Chitin Polymers 0.000 description 2
- 241000238424 Crustacea Species 0.000 description 2
- MSWZFWKMSRAUBD-UHFFFAOYSA-N beta-D-galactosamine Natural products NC1C(O)OC(CO)C(O)C1O MSWZFWKMSRAUBD-UHFFFAOYSA-N 0.000 description 2
- MSWZFWKMSRAUBD-QZABAPFNSA-N beta-D-glucosamine Chemical compound N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O MSWZFWKMSRAUBD-QZABAPFNSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- OVRNDRQMDRJTHS-UHFFFAOYSA-N N-acelyl-D-glucosamine Natural products CC(=O)NC1C(O)OC(CO)C(O)C1O OVRNDRQMDRJTHS-UHFFFAOYSA-N 0.000 description 1
- OVRNDRQMDRJTHS-FMDGEEDCSA-N N-acetyl-beta-D-glucosamine Chemical compound CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O OVRNDRQMDRJTHS-FMDGEEDCSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000006196 deacetylation Effects 0.000 description 1
- 238000003381 deacetylation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 235000004879 dioscorea Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229950006780 n-acetylglucosamine Drugs 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000003141 primary amines Chemical group 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000979 synthetic dye Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 238000009970 yarn dyeing Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
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
- D06P1/44—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
- D06P1/0036—Dyeing and sizing in one process
-
- 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
- D06P1/0076—Dyeing with mineral dye
-
- 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
Definitions
- the present invention generally finds application in the field of textile processing and particularly relates to a method of producing a dyed textile.
- a first drawback of these prior art methods is that these dyes are, at least partially, hazardous and polluting, and not easily disposable, and they must be used in large amounts to obtain an appreciable effect on textiles.
- a further drawback is that the yarns of the textile must undergo a number of processes before and after dying. Namely, the yarns must be desized, washed, mercerized and bleached before and after dyeing.
- WO2014/170876 discloses a method of processing and dyeing textiles which includes a step, known as desizing step, in which a predetermined amount of chitosan or derivatives thereof is applied on the yarns of the textile before dyeing.
- Chitosan is a natural product derived, for instance, from the chitin of crustaceans and its application on the yams imparts greater strength and dye absorption capacity thereto.
- chitosan is directly cured on the surface of the yarns, to further improve their mechanical properties before dyeing.
- the dyes that are used in the later dyeing step are also of chemical-synthetic type and suffer from the aforementioned drawbacks.
- a further drawback of this solution is that yarns must undergo additional processing steps, including curing or partial removal of chitosan, before being dyed.
- a further drawback is that this method requires plants with dedicated workstations to ensure optimized implementation.
- the technical problem addressed by the present invention is to provide a method of producing a dyed textile that is very simple and inexpensive and avoids the use of synthetic chemical dyes, which are highly toxic and not easily disposable.
- the object of the present invention is to obviate the above drawback, by providing a method of producing a dyed textile that is highly efficient and relatively cost-effective.
- a particular object of the present invention is to provide a method as described hereinbefore that is very simple and inexpensive.
- Another object of the present invention is to provide a method as described hereinbefore that reduces the overall water consumption.
- a further object of the present invention is to provide a method as described hereinbefore that does not use synthetic chemical dyes.
- Another object of the present invention is to provide a method as described hereinbefore that does not weaken the structure of the textile threads.
- a further object of the present invention is to provide a method as described hereinbefore that reduces the overall amount of dyes required for optimal dyeing of the textile.
- Yet another object of the present invention is to provide a method as described hereinbefore that may be used in existing plants of the textile industry.
- a further object of the present invention is to provide a method as described hereinbefore that can use waste materials obtained from different processes.
- a method of producing a dyed textile as defined in claim 1, which comprises a step of a) providing a plurality of weft threads and a plurality of warp threads, a step of b) impregnating the warp threads with a solution containing a polymer for improving the mechanical properties of the threads, a step of c) weaving the weft threads and the warp threads to obtain a textile, a step of d) dyeing the textile with a dye composition and a step of e) drying the dyed textile.
- the dye composition comprises a predetermined amount of graphite and no additional intermediate textile processing steps are provided between said dyeing step d) and said drying step e).
- FIG. 1 is a block diagram of the method of producing a dyed textile according to the invention.
- the warp and weft threads may be cotton threads, cotton and linen threads or cotton and silk threads, and the final textile may be a denim fabric.
- the method comprises a step of a) providing a plurality of weft threads and a plurality of warp threads and a step of b) impregnating the warp threads with a solution containing a polymer for improving the mechanical properties of the threads.
- the step b) is typically known as “desizing” and is carried out, as is known per se, using a desizing machine with a respective tank containing the solution with the polymer.
- the polymer may be selected from the group of polycationic biopolymers comprising chitosan and derivatives thereof, which have a plurality of periodically distributed positive charges.
- Chitosan is a polysaccharide composed of D-glucosamine and N-acetyl-D-glucosamine monomers, and is obtained by deacetylation of chitin, a natural polymer that is found in the exoskeleton of crustaceans.
- D-glucosamine monomers comprise respective primary amine groups which can be easily protonated under weakly acidic conditions and are responsible for the positive charges distributed along the polymer chain.
- the impregnating solution may contain an amount of chitosan or derivatives thereof ranging from 1% to 3% by weight.
- the method may advantageously comprise a step of f) dipping the warp threads in pure water and later squeezing the threads to remove excess water.
- the inner side of the warp threads may be completely imbibed, while the outer side is available for later impregnation with the chitosan solution.
- the method comprises a step of c) weaving the chitosan-impregnated weft threads and warp threads to obtain a fabric, and this step may be preferably preceded by a step of stretching and winding the warp threads.
- a step of d) dyeing the textile with a dye composition of dyeing and a step of e) drying the dyed textile are provided.
- the dyeing step d) is carried out by dipping the impregnated textile in a tank containing the dye composition and squeezing the textile with one or more squeezing rolls to facilitate absorption of the composition.
- the dyeing step d) may be carried out using a padding machine, which comprises the tank for the composition and one or more squeezing rolls.
- the drying step e) is carried out using a tentering machine disposed in line with the tank and the squeezing rolls of the padding machine, such that the dyeing step d) and the drying step e) may be carried out continuously.
- a second embodiment of the invention differs from the first embodiment in that the drying step e) is carried out using a tentering machine disposed in parallel with respect to the tank and the squeezing rolls of the padding machine, such that the dyeing step d) and the drying step e) may be carried out discontinuously.
- the drying step may be carried out in the tentering machine for 15 seconds at a temperature of 120°C.
- the dye composition comprises a predetermined amount of graphite, for imparting a gray color to the textile. Furthermore, the method does not include intermediate textile treatment steps between the dyeing step d) and the drying step e).
- Graphite is electrically conductive, as each of its graphene sheets has a free electron that is not involved in the formation of covalent bonds with other carbon atoms of the sheet.
- the negative charges generated by the free electrons of graphite interact with the positive charges of chitosan, thereby facilitating absorption of the dyeing composition on the threads of the textile.
- the dye composition may comprise a predetermined weight fraction of water and a predetermined weight fraction of a base compound containing powdered graphite.
- the weight fraction of water may range from 70% to 90% based on the total weight of the dye composition and the weight fraction of the base compound may range from 10% to 30% based on the total weight of the dye composition.
- weight fractions are only given by way of example and may be suitably changed according to the desired intensity of the color to be imparted to the textile, without departure from the scope of the present invention.
- powdered graphite may be obtained from waste materials of other processes carried out in other industrial contexts, such as automotive or electronics.
- the dye composition is obtained directly within the dyeing tank of the padding machine, by dilution of the base compound with a predetermined amount of water.
- the graphite in the dye composition is almost entirely absorbed by the textile, which will simplify the later dye composition disposal and storage steps.
- the base compound may comprise a weight fraction of water that ranges from 35% to 45%, a weight fraction of powdered graphite that ranges from 40% to 50%, and an overall weight fraction of a bactericidal agent, an antifoaming agent, dipropylene glycol, a dispersing agent and a binding agent that ranges from 5% to 25% based on the total weight of the base compound.
- a weight fraction of water that ranges from 35% to 45%
- a weight fraction of powdered graphite that ranges from 40% to 50%
- an overall weight fraction of a bactericidal agent, an antifoaming agent, dipropylene glycol, a dispersing agent and a binding agent that ranges from 5% to 25% based on the total weight of the base compound.
- the dispersing agent may be sodium polyacrylate and the binding agent may be selected from the group of the acrylates, whereas the base compound can exhibit a predetermined final viscosity grade.
- the formation of the base compound first includes the step of providing a predetermined amount of powdered graphite having a coarse particle size, e.g. 100 ⁇ m, and the step of introducing it into a stirrer with the other above mentioned components.
- the stirring step is carried out for 20 minutes at 90 rpm and results in a pre-dispersion, in which all the above listed components are uniformly distributed.
- the pre-dispersion is treated under pressure in a horizontal mill comprising zirconium balls.
- the pre-dispersion is treated in the mill until the particle size of the graphite powder is less than 7 ⁇ m.
- the pre-dispersion is filtered with a self-cleaning filter at 100 mesh to obtain the base compound, which is later packaged in plastic containers having a capacity of 30 kg each.
- the method of producing a dyed textile fulfills the intended objects and particularly meets the requirements of avoiding the use of synthetic dyes, using recycled materials and reducing the overall power and water consumptions.
- the method of producing a dyed textile according to the invention is susceptible of a number of changes and variants, within the inventive concept disclosed in the appended claims.
- the present invention may find application in industry, because it can be produced on an industrial scale in textile processing plants.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Coloring (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
Description
- The present invention generally finds application in the field of textile processing and particularly relates to a method of producing a dyed textile.
- The use of methods and plants for dyeing textiles with synthetic chemical dyes has been been long known in the textile processing industry.
- A first drawback of these prior art methods is that these dyes are, at least partially, hazardous and polluting, and not easily disposable, and they must be used in large amounts to obtain an appreciable effect on textiles.
- A further drawback is that the yarns of the textile must undergo a number of processes before and after dying. Namely, the yarns must be desized, washed, mercerized and bleached before and after dyeing.
- This extends the overall processing time and at least partially weakens the textile fibers.
- Another drawback is that the use of these chemical dyes requires large amounts of water, which increases the overall processing consumption and costs.
- In an attempt to at least partially obviate these drawbacks, methods of treating and dyeing textiles have been developed which include the application of a reinforcing agent to the yarns of the textile before submitting it to processing steps.
-
WO2014/170876 discloses a method of processing and dyeing textiles which includes a step, known as desizing step, in which a predetermined amount of chitosan or derivatives thereof is applied on the yarns of the textile before dyeing. - Chitosan is a natural product derived, for instance, from the chitin of crustaceans and its application on the yams imparts greater strength and dye absorption capacity thereto.
- After application, chitosan is directly cured on the surface of the yarns, to further improve their mechanical properties before dyeing.
- Nevertheless, the dyes that are used in the later dyeing step are also of chemical-synthetic type and suffer from the aforementioned drawbacks.
- A further drawback of this solution is that yarns must undergo additional processing steps, including curing or partial removal of chitosan, before being dyed.
- Another drawback is that the overall water consumption for the entire process is only partially reduced and have a dramatic impact on the overall processing cost.
- A further drawback is that this method requires plants with dedicated workstations to ensure optimized implementation.
- Yet another drawback is that this solution does not afford the use of waste materials from other processes, possibly occurring in different technical fields.
-
WO2016/034997 , ITMI2012778,US5501711 , and the papers "Chitosan boosts dyeing efficiency" and "Effective utilization of chitosan for dyeing" disclose methods of treating textiles with chitosan to improve affinity with a dye composition. -
US1870408 andFR569763 - One drawback of these solution is that a minor or variable increase of the affinity of the fabric or yarn with the dye composition is obtained after treatment.
- In the light of the prior art, the technical problem addressed by the present invention is to provide a method of producing a dyed textile that is very simple and inexpensive and avoids the use of synthetic chemical dyes, which are highly toxic and not easily disposable.
- The object of the present invention is to obviate the above drawback, by providing a method of producing a dyed textile that is highly efficient and relatively cost-effective.
- A particular object of the present invention is to provide a method as described hereinbefore that is very simple and inexpensive.
- Another object of the present invention is to provide a method as described hereinbefore that reduces the overall water consumption.
- A further object of the present invention is to provide a method as described hereinbefore that does not use synthetic chemical dyes.
- Another object of the present invention is to provide a method as described hereinbefore that does not weaken the structure of the textile threads.
- A further object of the present invention is to provide a method as described hereinbefore that reduces the overall amount of dyes required for optimal dyeing of the textile.
- Yet another object of the present invention is to provide a method as described hereinbefore that may be used in existing plants of the textile industry.
- A further object of the present invention is to provide a method as described hereinbefore that can use waste materials obtained from different processes.
- These and other objects, as more clearly explained below, are fulfilled by a method of producing a dyed textile as defined in claim 1, which comprises a step of a) providing a plurality of weft threads and a plurality of warp threads, a step of b) impregnating the warp threads with a solution containing a polymer for improving the mechanical properties of the threads, a step of c) weaving the weft threads and the warp threads to obtain a textile, a step of d) dyeing the textile with a dye composition and a step of e) drying the dyed textile.
- The dye composition comprises a predetermined amount of graphite and no additional intermediate textile processing steps are provided between said dyeing step d) and said drying step e).
- Advantageous embodiments of the invention are obtained in accordance with the dependent claims.
- Further features and advantages of the invention will be more apparent from the detailed description of a preferred, non-exclusive embodiment of method of producing a dyed textile according to the invention, which is described as a non-limiting example with the help of the annexed drawings, in which:
FIG. 1 is a block diagram of the method of producing a dyed textile according to the invention. - Particularly referring to the aforementioned figure, there is shown a method of producing a dyed textile composed of a plurality of warp threads and a plurality of weft threads.
- The warp and weft threads may be cotton threads, cotton and linen threads or cotton and silk threads, and the final textile may be a denim fabric.
- In a preferred embodiment of the invention, the method comprises a step of a) providing a plurality of weft threads and a plurality of warp threads and a step of b) impregnating the warp threads with a solution containing a polymer for improving the mechanical properties of the threads.
- The step b) is typically known as "desizing" and is carried out, as is known per se, using a desizing machine with a respective tank containing the solution with the polymer.
- Conveniently, the polymer may be selected from the group of polycationic biopolymers comprising chitosan and derivatives thereof, which have a plurality of periodically distributed positive charges.
- Chitosan is a polysaccharide composed of D-glucosamine and N-acetyl-D-glucosamine monomers, and is obtained by deacetylation of chitin, a natural polymer that is found in the exoskeleton of crustaceans.
- Furthermore, D-glucosamine monomers comprise respective primary amine groups which can be easily protonated under weakly acidic conditions and are responsible for the positive charges distributed along the polymer chain.
- The impregnating solution may contain an amount of chitosan or derivatives thereof ranging from 1% to 3% by weight.
- Upstream from the impregnation step b), the method may advantageously comprise a step of f) dipping the warp threads in pure water and later squeezing the threads to remove excess water.
- With the dipping step f) the inner side of the warp threads may be completely imbibed, while the outer side is available for later impregnation with the chitosan solution.
- The method comprises a step of c) weaving the chitosan-impregnated weft threads and warp threads to obtain a fabric, and this step may be preferably preceded by a step of stretching and winding the warp threads.
- Furthermore, a step of d) dyeing the textile with a dye composition of dyeing and a step of e) drying the dyed textile are provided.
- The dyeing step d) is carried out by dipping the impregnated textile in a tank containing the dye composition and squeezing the textile with one or more squeezing rolls to facilitate absorption of the composition.
- As is known in the art, the dyeing step d) may be carried out using a padding machine, which comprises the tank for the composition and one or more squeezing rolls.
- In a first embodiment of the invention, the drying step e) is carried out using a tentering machine disposed in line with the tank and the squeezing rolls of the padding machine, such that the dyeing step d) and the drying step e) may be carried out continuously.
- A second embodiment of the invention differs from the first embodiment in that the drying step e) is carried out using a tentering machine disposed in parallel with respect to the tank and the squeezing rolls of the padding machine, such that the dyeing step d) and the drying step e) may be carried out discontinuously.
- In both first and second embodiments, the drying step may be carried out in the tentering machine for 15 seconds at a temperature of 120°C.
- In a peculiar aspect of the invention, the dye composition comprises a predetermined amount of graphite, for imparting a gray color to the textile. Furthermore, the method does not include intermediate textile treatment steps between the dyeing step d) and the drying step e).
- Due to the combination of these features and the use of chitosan, the use of synthetic chemical dyes may be avoided and the overall water and power consumptions of the entire textile washing and dyeing process may be reduced.
- Graphite is electrically conductive, as each of its graphene sheets has a free electron that is not involved in the formation of covalent bonds with other carbon atoms of the sheet.
- The negative charges generated by the free electrons of graphite interact with the positive charges of chitosan, thereby facilitating absorption of the dyeing composition on the threads of the textile.
- Advantageously, the dye composition may comprise a predetermined weight fraction of water and a predetermined weight fraction of a base compound containing powdered graphite.
- For example, the weight fraction of water may range from 70% to 90% based on the total weight of the dye composition and the weight fraction of the base compound may range from 10% to 30% based on the total weight of the dye composition.
- Of course, these weight fractions are only given by way of example and may be suitably changed according to the desired intensity of the color to be imparted to the textile, without departure from the scope of the present invention.
- Furthermore, powdered graphite may be obtained from waste materials of other processes carried out in other industrial contexts, such as automotive or electronics.
- The dye composition is obtained directly within the dyeing tank of the padding machine, by dilution of the base compound with a predetermined amount of water.
- During the dyeing step, the graphite in the dye composition is almost entirely absorbed by the textile, which will simplify the later dye composition disposal and storage steps.
- Preferably, the base compound may comprise a weight fraction of water that ranges from 35% to 45%, a weight fraction of powdered graphite that ranges from 40% to 50%, and an overall weight fraction of a bactericidal agent, an antifoaming agent, dipropylene glycol, a dispersing agent and a binding agent that ranges from 5% to 25% based on the total weight of the base compound.
- The dispersing agent may be sodium polyacrylate and the binding agent may be selected from the group of the acrylates, whereas the base compound can exhibit a predetermined final viscosity grade.
- The formation of the base compound first includes the step of providing a predetermined amount of powdered graphite having a coarse particle size, e.g. 100 µm, and the step of introducing it into a stirrer with the other above mentioned components.
- The stirring step is carried out for 20 minutes at 90 rpm and results in a pre-dispersion, in which all the above listed components are uniformly distributed.
- Then, the pre-dispersion is treated under pressure in a horizontal mill comprising zirconium balls. The pre-dispersion is treated in the mill until the particle size of the graphite powder is less than 7µm.
- The pre-dispersion is filtered with a self-cleaning filter at 100 mesh to obtain the base compound, which is later packaged in plastic containers having a capacity of 30 kg each.
- It will be appreciated from the foregoing that the method of producing a dyed textile fulfills the intended objects and particularly meets the requirements of avoiding the use of synthetic dyes, using recycled materials and reducing the overall power and water consumptions.
- The method of producing a dyed textile according to the invention is susceptible of a number of changes and variants, within the inventive concept disclosed in the appended claims.
- While the method has been described with particular reference to the accompanying figures, the numerals referred to in the disclosure and claims are only used for the sake of a better intelligibility of the invention and shall not be intended to limit the claimed scope in any manner.
- The present invention may find application in industry, because it can be produced on an industrial scale in textile processing plants.
Claims (11)
- A method of producing a dyed textile, which method comprises the steps of:a) providing a plurality of weft threads and a plurality of warp threads;b) impregnating the warp threads with a solution containing a polymer for improving the mechanical properties of the threads;c) weaving the weft threads and the warp threads to obtain a textile;d) dyeing the textile with a dye composition;e) drying the dyed textile;characterized in that said dye composition comprises a predetermined amount of graphite, and in that that no intermediate processing steps are provided between said dyeing step d) and said drying step e), said polymer being selected from the group comprising chitosan or derivatives thereof, having a plurality of periodically distributed positive charges adapted for interaction with the negative charges of said dye composition.
- A method as claimed in claim 1, wherein said dyeing step d) is carried out by dipping the impregnated textile in a tank containing said dye composition and squeezing the textile with one or more squeezing rolls to facilitate absorption of the composition.
- A method as claimed in claim 1, characterized in that said dye composition comprises a predetermined weight fraction of water and a predetermined weight fraction of a base compound containing powdered graphite.
- A method as claimed in claim 3, characterized in that the weight fraction of water ranges from 70% to 90% based on the total weight of the dye composition, and said weight fraction of the base compound ranges from 10% to 30% based on the total weight of the dye composition.
- A method as claimed in claim 3, characterized in that said base compound is diluted with water directly in said impregnation tank to form said dye composition.
- A method as claimed in claim 1, characterized in that it comprises, upstream from the impregnation step b), a step of f) dipping the warp threads in pure water and later squeezing the threads to remove excess water.
- A method as claimed in claim 1, characterized in that said drying step e) is carried out using a tentering machine disposed in line with said tank and said squeezing cylinders, said dyeing step d) and said drying step e) being carried out continuously.
- A method as claimed in claim 1, characterized in that said drying step e) is carried out using a tentering machine disposed in parallel with respect to said tank and said squeezing rolls, said dyeing step d) and said drying step e) being carried out discontinuously.
- A method as claimed in claim 1, characterized in that said impregnating solution contains a weight fraction of chitosan or derivatives thereof that ranges from 1% to 3%.
- A method as claimed in claim 3 wherein the base compound comprises:a weight fraction of water that ranges from 35% to 45%;a weight fraction of powdered graphite that ranges from 40% to 50%;an overall weight fraction of an antifoaming agent, a bactericidal agent, dipropylene glycol, a dispersing agent and a binding agent that ranges from 5% to 25%.
- A method as claimed in claim 10, wherein said dispersing agent is sodium polyacrylate and said binding agent is selected from the group of the acrylates.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102017000042340A IT201700042340A1 (en) | 2017-04-18 | 2017-04-18 | METHOD FOR THE REALIZATION OF A DYED FABRIC |
Publications (2)
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EP3392402A1 true EP3392402A1 (en) | 2018-10-24 |
EP3392402B1 EP3392402B1 (en) | 2020-05-27 |
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EP18167214.8A Active EP3392402B1 (en) | 2017-04-18 | 2018-04-13 | Method for manufacturing a dyed textile |
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EP (1) | EP3392402B1 (en) |
ES (1) | ES2810002T3 (en) |
IT (1) | IT201700042340A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4303203A1 (en) | 2022-07-04 | 2024-01-10 | ALISEA S.r.l. Società Benefit | Coating based on geopolymer binder and method for attaining a coating based on geopolymer binder |
Citations (5)
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---|---|---|---|---|
FR569763A (en) * | 1922-08-26 | 1924-04-17 | Dispersoid Syndicate Ltd | Process and product for dyeing and printing textiles and other substances or articles |
US1870408A (en) * | 1929-02-25 | 1932-08-09 | Celanese Corp | Coloring of textile materials |
US5501711A (en) * | 1994-10-26 | 1996-03-26 | Water & Oil Technologies, Inc. | Method for treatment of cellulose fabrics to improve their dyeability with reactive dyes |
ITMI20121778A1 (en) * | 2012-10-19 | 2014-04-20 | Canepa S P A | PROCEDURE TO INCREASE THE FINE FINISHING OF A FABRIC, A JERSEY OR A FINISHED HEAD. |
WO2016034997A1 (en) * | 2014-09-03 | 2016-03-10 | Canepa S.P.A. | Sizing composition for fibers, yarns and/or fabrics and process for preparing such sizing composition |
-
2017
- 2017-04-18 IT IT102017000042340A patent/IT201700042340A1/en unknown
-
2018
- 2018-04-13 ES ES18167214T patent/ES2810002T3/en active Active
- 2018-04-13 EP EP18167214.8A patent/EP3392402B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR569763A (en) * | 1922-08-26 | 1924-04-17 | Dispersoid Syndicate Ltd | Process and product for dyeing and printing textiles and other substances or articles |
US1870408A (en) * | 1929-02-25 | 1932-08-09 | Celanese Corp | Coloring of textile materials |
US5501711A (en) * | 1994-10-26 | 1996-03-26 | Water & Oil Technologies, Inc. | Method for treatment of cellulose fabrics to improve their dyeability with reactive dyes |
ITMI20121778A1 (en) * | 2012-10-19 | 2014-04-20 | Canepa S P A | PROCEDURE TO INCREASE THE FINE FINISHING OF A FABRIC, A JERSEY OR A FINISHED HEAD. |
WO2016034997A1 (en) * | 2014-09-03 | 2016-03-10 | Canepa S.P.A. | Sizing composition for fibers, yarns and/or fabrics and process for preparing such sizing composition |
Non-Patent Citations (3)
Title |
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CANAL J M ET AL: "CHITOSAN BOOSTS DYEING EFFICIENCY", INTERNATIONAL DYER, WORLD TEXTILE PUBLICATIONS, BRADFORD, GB, vol. 183, no. 2, 1 February 1998 (1998-02-01), XP000769058, ISSN: 0020-658X * |
CHEMICAL ABSTRACTS, vol. 111, 25 November 1989, Columbus, Ohio, US; abstract no. 111:196619, OISHI, KOICHI; INUI, TAKUO: "Effective utilization of chitosan for dyeing" XP002776809 * |
KOICHI OISHI ET AL: "Effective utilization of chitosan for dyeing", SHIZUOKA-KEN HAMAMATSU SEN'I KOGYO SHIKENJO HOKOKU, vol. 27, 1 January 1988 (1988-01-01), pages 22 - 26, XP055436363, ISSN: 0285-4171 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4303203A1 (en) | 2022-07-04 | 2024-01-10 | ALISEA S.r.l. Società Benefit | Coating based on geopolymer binder and method for attaining a coating based on geopolymer binder |
Also Published As
Publication number | Publication date |
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EP3392402B1 (en) | 2020-05-27 |
ES2810002T3 (en) | 2021-03-08 |
IT201700042340A1 (en) | 2018-10-18 |
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