WO2024003726A1 - Composé particulaire et procédé de formation d'un composé particulaire - Google Patents

Composé particulaire et procédé de formation d'un composé particulaire Download PDF

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Publication number
WO2024003726A1
WO2024003726A1 PCT/IB2023/056608 IB2023056608W WO2024003726A1 WO 2024003726 A1 WO2024003726 A1 WO 2024003726A1 IB 2023056608 W IB2023056608 W IB 2023056608W WO 2024003726 A1 WO2024003726 A1 WO 2024003726A1
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Prior art keywords
silicate mineral
inorganic pigment
particles
compound
pigment
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PCT/IB2023/056608
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English (en)
Inventor
Manel SUBIRATS COSTA
Original Assignee
Horizon Research Lab, S.L.
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by Horizon Research Lab, S.L. filed Critical Horizon Research Lab, S.L.
Publication of WO2024003726A1 publication Critical patent/WO2024003726A1/fr

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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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
    • 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
    • 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
    • D06P1/67383—Inorganic compounds containing silicon
    • 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

Definitions

  • the present disclosure concerns a compound, particularly a particulate compound which is suitable for coloring substrates, preferably substrates comprising cellulose fibers.
  • a preferred application of the compound is dyeing textiles.
  • the present disclosure concerns a solution or dispersion comprising said compound, and methods for manufacturing, i.e. preparing, said compound, solution or dispersion.
  • the present disclosure concerns the use of said compound or solution or dispersion for coloring substrates, and particularly concerns a method for dyeing textiles using said compound.
  • the present disclosure concerns a textile dyed using said method for dying textiles.
  • Patent document CN 105199435 A discloses a preparation method of a cobalt blue and clay mineral hybrid pigment, wherein a precursor is prepared with a co-precipitation technique using a Co(lll) salt and a Al(lll) salt as raw materials and inorganic clay minerals as filler, and wherein the cobalt blue and clay mineral hybrid pigment is prepared through high-temperature crystallization.
  • Patent document CN 106278031 A discloses a roller coating type interior wall powder material and a preparation method thereof, the material being prepared from, by mass, 30 parts of diatomite, 15 parts of coarse whiting powder, 8 parts of titanium dioxide, 0.3 part of antifoaming agent, 5 parts of white cement, 4 parts of attapulgite, 5 parts of kaolin, 10 parts of talcum powder, 5 parts of illite, 0.4 part of mildew preventive, 15 parts of sepiolite, 0.3 part of wood fibers and 2 parts of natural inorganic mineral pigments.
  • Patent document CN 107083696 A discloses a fabric dye and a preparation method thereof, wherein the fabric dye is prepared from, by mass, 25-35% of organic acid dye, 35-45% of Maya blue and water.
  • CN 107083696 A describes that the organic acid dye is added into the water at a temperature of 58-66°C, the mixture is kept at 66-78°C for 3-10 min after mixing, then the mixture is cooled to 10-25°C, the Maya blue is added, a dye mixture is obtained, then the dye mixture is heated to 45-70°C and the mixture is kept for 20-40 min, and a finished fabric dye product is obtained after cooling.
  • Patent document US 8,123,850 B2 discloses a hybrid pigment composition including a pigment or a dye and a fibrous clay which can be selected from palygorskite, sepiolite, and mixtures thereof.
  • Patent document US 2008/044582 A1 discloses an aqueous textile printing composition that can be used with multicolor rotating screen printing machines.
  • a publication (Chen Huiwen et al., “A new method to prepare ‘Maya red’ pigment from sepiolite and Basic red 46”, Applied Clay Science, vol.
  • 174, pages 38-49 discloses preparing hybrid pigments of sepiolite and basic red 46 (XL-GRL), using a vacuum method, a solid method and a liquid method, wherein for the vacuum method, 2 g of sepiolite was heated at 180°C for 1 h in a vacuum environment, then stirred for 4 h in 50 ml of concentrated XL-GRL aqueous solution at 50°C, and then the mixtures were centrifuged at 10000 rpm for 20 min.
  • XL-GRL basic red 46
  • the present invention provides a compound which comprises components which can be found in nature.
  • the compound can be made and used with methods which are not complex nor difficult to implement.
  • the use of the compound for dyeing textiles does not require the consumption of large quantities of water, and hence the present invention is particularly useful and beneficial to the textile industry which always requires improvements aimed at being environmentally friendly and safe to the industry’s workers, to the users of textiles, and to the society as a whole.
  • a first aspect of the present invention concerns a particulate compound, the compound comprising an inorganic pigment and a silicate mineral which is a phyllosilicate or a zeolite.
  • a silicate mineral which is a phyllosilicate or a zeolite.
  • the silicate mineral is sepiolite which is a type of phyllosilicate and a natural clay.
  • the inorganic pigment is or comprises a mineral.
  • the compound according to the first aspect of the invention is particulate i.e. the compound comprises or consists of particles.
  • Said particles may comprise particles of the silicate mineral and/or the (inorganic) pigment, but preferably at least some, or more preferably all, of the compound’s particles comprise both silicate mineral and pigment, and most preferably in the particles which comprise both silicate mineral and pigment, at least some of the pigment is bonded to the silicate mineral.
  • at least a part of said compound may comprise, or may be described as. a silicate mineral-pigment complex.
  • a silicate mineral-pigment complex preferably at least some, and more preferably all, of the inorganic pigment is bonded to the silicate mineral.
  • the silicate mineral of the particulate compound is a phyllosilicate or a zeolite
  • the structure of the phyllosilicate or of the zeolite may provide for channels in/to which the pigment can diffuse and attach.
  • the silicate mineral is sepiolite
  • the sepiolite’s structure may provide for channels in which the pigment can diffuse and attach to the sepiolite.
  • the pigment may attach on the surface of the silicate mineral.
  • at least some, and preferably all, of the inorganic pigment may be on a surface or inside channels of the silicate mineral.
  • the silicate mineral is any of the following phyllosilicates: sepiolite, palygorskite, attapulgite, antigorite, chrysotile, lizardite, halloysite, kaolinite, pyrophyllite, talc, illite, montmorillonite, smectite, chlorite, vermiculite, biotite, fuchsite, muscovite, phlogopite, lepidolite, margarite, or glauconite. It is contemplated that the above phyllosilicates, due to their structure, may provide channels or surface sites at/on which the pigment may diffuse and attach.
  • the silicate mineral is any of the following zeolites: analcime, chabazite, clinoptilolite, heulandite, natrolite, phillipsite, or stilbite. It is contemplated that the above zeolites, due to their structure, may provide channels or surface sites at/on which the pigment may diffuse and attach.
  • the particles of the compound if the latter is dispersed or dissolved in a liquid may change in size and/or shape.
  • the particulate nature of the compound renders the latter suitable for being processed in the form of aqueous solutions or dispersion, for use for the coloring substrates, particularly textiles.
  • the compound works exceptionally well for coloring or dyeing substrates. It is estimated that the silicate mineral may act as a carrier of the pigment for the delivery of the latter to a substrate that may require coloring or dyeing.
  • the compound is particularly effective for high quality coloring or dyeing of substrates which comprise cellulose fibers, e.g. textiles comprising cotton.
  • the silicate mineral may have a particularly affinity and attach to cellulose fibers for delivering the pigment at said fibers.
  • the compound consists of the silicate mineral and the inorganic pigment. Hence, the use of artificial and/or toxic chemicals may be avoided, to the benefit of the environment.
  • a concentration of the inorganic pigment in the compound is of between 10% and 90% by weight, and preferably is of between 30% and 70%, and more preferably is of between 40% and 60%, and most preferably is about 50%.
  • the concentration of the pigment may be varied according to the aforementioned values and value ranges, so that advantageously the color of the pigment is controlled, for thereby controlling the change in the color that may be imparted on a substrate treated with the compound.
  • the pigment concentration may be controlled for optimizing the morphology and homogeneity of the particulate compound. If the pigment concentration is very small, e.g. is less that 10%, the compound may not be capable for efficiently coloring a substrate, and if the pigment concentration is very high, e.g. is more than 90%, then a substrate colored with the compound may be uneven.
  • a compound with 50% (by weight) pigment has been found to advantageously be homogeneous and particularly easy to use for dyeing textiles which comprise cotton.
  • the compound comprises particles of a size of less than 15 pm.
  • Said particles may be particles of silicate mineral, pigment and/or a mixture (or complex) of silicate mineral and pigment. Having particles of sizes less than 15 pm aids towards the compound being homogenous and processable in solution, e.g. for the compound being suitable for being adequately dissolved or dispersed in water.
  • Said “size” may preferably be understood as a diameter of the particle. In particular, the size may be the size, e.g.
  • the compound comprises particles of a size of between 100 nm and 15 pm or of between 100 nm and 1 pm.
  • another aspect of the present invention concerns a solution or dispersion, comprising a particulate compound which is according to any of the previous claims.
  • said solution or dispersion is aqueous, meaning that the particulate compound is dissolved or dispersed in water.
  • Another aspect of the invention concerns a method for forming a particulate compound, the method comprising: mixing particles of silicate mineral with particles of an inorganic pigment, thereby forming a particulate mixture, wherein the inorganic pigment is or comprises a mineral, and wherein the silicate mineral is a phyllosilicate or a zeolite; and heating under vacuum the particulate mixture at a temperature of up to about 300°C. Said heating can provoke the breaking of the particles into smaller ones, and can provoke or accelerate the formation of bonds between the inorganic pigment and the silicate mineral, as well as provoke or accelerate the possible diffusion of the pigment in channels of the silicate mineral.
  • Said vacuum may advantageously also prevent the bonding of the silicate mineral with other materials such as for example compounds being present in the air and containing hydrogen, nitrogen, oxygen or carbon. It is estimated that the removal of water molecules from the silicate mineral surface, and particularly from the channels in the silicate mineral structure, advantageously promotes the mixing and possible reaction of the pigment with the silicate mineral.
  • the silicate mineral is sepiolite.
  • the method before mixing the particles of the silicate mineral with the particles of the inorganic pigment, the method further comprises drying the particles of the silicate mineral. More preferably said drying is done by heating under vacuum the particles of the silicate mineral at a temperature of about 130°C for 30 minutes.
  • Preferred embodiments of said method also comprise micronizing the silicate mineral and/or the inorganic pigment for forming, respectively, said particles of the silicate mineral and said particles of the inorganic pigment, preferably the micronizing done using a micronized mill.
  • at least some, preferably most or all, of the particles of the silicate mineral and/or the particles of the inorganic pigment have a size of 10 pm or less. It has been observed that silicate mineral and pigment particles of size of 10 pm or less, advantageously mix well and result to the formation of a particulate compound with good homogeneity and solubility or dispersibility in water.
  • the use of a commercially available industrial scale micronizer mill has been found to particularly be suitable for obtaining the aforementioned advantageous particles sizes, at industrially relevant quantities.
  • the steps of mixing and heating are done in a reactor which comprises a mixer and a vessel in which said mixing and heating takes place, and wherein: the particles of the silicate mineral and the particles of the inorganic pigment are loaded in the vessel by suction (i.e. the force of vacuum); in said vessel the silicate mineral and the inorganic pigment are mixed by means of the mixer; and said vessel is heated, thereby gradually heating the particulate mixture at the temperature of up to about 300°C.
  • the mixture remains, i.e. is maintained, at said temperature for a period of about 30 minutes.
  • the proportion by weight between the inorganic pigment and the silicate mineral in the particulate mixture is of between 10/90 and 90/10, preferably of between 30/70 and 70/30, more preferably of between 40/60 and 60/40, and most preferably is about 50/50.
  • Another aspect of the invention concerns a method for dyeing textiles, the method comprising: wetting a textile with an aqueous solution or dispersion of a compound which comprises silicate mineral and an inorganic pigment, wherein the silicate material is a phyllosilicate or a zeolite, and wherein said inorganic pigment is or comprises a mineral; the textile remaining wet (i.e. wet and dyed) for a period of time; washing the textile; and drying the textile.
  • the aforementioned method step of “the textile remaining wet for a period of time” can also be interpreted as meaning “permitting or allowing the textile to remain wet for a period of time”.
  • the compound in the solution is particulate, because said compound may be dissolved sufficiently so that it is difficult or practically impossible to resolve any particles of said compound in the solution.
  • the compound when not dissolved, or when isolated/extracted from the solution may be particulate, when dissolved (i.e. in the solution) may not be particulate, or may comprise particles which are very small and difficult to measure/resolve.
  • the compound is also particulate in an aqueous solution or dispersion of said compound.
  • the step of wetting the textile with the aqueous solution or dispersion comprises: spraying or showering the aqueous solution or dispersion on the textile; and passing the wet textile between two or more cylinders which squeeze the fabric. Said spraying or showering can yield a uniform wetting of the textile and a uniform distribution of the compound on the textile.
  • the amount of aqueous solution or dispersion that is applied on the textile e.g. by controlling said amount, as a function of a speed via which the textile moves in a processing line, the amounts of the compound and of the pigment deposited on the textile per unit surface or unit volume of the material, can be controlled.
  • the amounts of the compound and of the pigment deposited on the textile per unit surface or unit volume of the material may also be controlled by a pressure applied on the textile by the aforementioned optionally used two or more cylinders.
  • the solution used for wetting the compound is at a temperature below 50°C, and more preferably at a temperature of between 20°C and 50°C, most preferably of about 30°C.
  • the solution does not need to be heated because the compound may dissolve and dye effectively the textile, even when the solution used it is at or close to room temperature.
  • the textile after passing between the two or more cylinders has a wet pickup value of between 30% and 90%, preferably of between 50% and 70%, more preferably of between 60 and 70%.
  • the wet pickup value is calculated using the formula:
  • a wet pickup value of 70% means that 70 kg of aqueous solution or dispersion is retained (absorbed) by a textile which when it is dry (before absorbing the solution) weights 100 kg. It is contemplated that in many cases (but not all) when the pickup value is less than 30%, then the pigment molecules may not diffuse or migrate sufficiently into the textile, and hence the textile may not be dyed as desired.
  • the textile comprises cellulose fibers, and preferably comprises cotton.
  • the compound works very well on textiles, e.g. on fabrics, comprising or consisting of cotton.
  • the method further comprises: rolling the textile on a cylinder thereby forming a roll; and rotating said roll during the period of time at which the textile remains wet.
  • rotating said roll is done at a constant speed. An effect of rotating the roll in the previous two embodiments, is that gravity does not produce downward color migration.
  • the method further comprises wrapping the roll in a plastic or polymer film.
  • An advantageous effect of said wrapping is to prevent evaporation on the outer layers or on the sides of the fabric roll (cylinder) so that color migration is homogeneous and controlled during the said period of time which may also be called “maturing” time.
  • a concentration of the compound in the aqueous solution or dispersion is of between 10 and 30 gr/L.
  • a concentration within the concentration range may advantageously contribute to the delivery of a sufficient amount of compound, and hence pigment, on the textile.
  • drying the textile particularly comprises: a first heating step which comprises heating the fabric at first temperature, and maintaining the fabric at said first temperature for a duration of time during which the fabric is not completely dry; and a second heating step which comprises heating the fabric at a second temperature which is higher than the first temperature, for completely drying the fabric.
  • a first heating step which comprises heating the fabric at first temperature, and maintaining the fabric at said first temperature for a duration of time during which the fabric is not completely dry
  • a second heating step which comprises heating the fabric at a second temperature which is higher than the first temperature, for completely drying the fabric.
  • Said “two sides effect” refers to the case where the two faces of the same fabric are left with a different intensity due to “vertical migration” across the fabric, from its underside to its top side (a migration of color through the “thickness” of the fabric, which could happen especially in cases where the fabric runs horizontally) during an unoptimized drying process.
  • drying the textile is done using an oven configured to heat the fabric under an atmosphere which is free of condensed vapor, and the oven is also configured to avoid the formation and falling on the textile of water droplets inside the oven, and more preferably the first heating step is done under an atmospheric humidity of about 10% and with the first temperature being about 55°C.
  • the method for drying textiles may further comprise additional textile processing or finishing steps. Therefore, in a preferred embodiment of the method, after drying the textile, the method further comprises softening the textile and drying it again.
  • Another aspect of the invention concerns a textile dyed using the invention’s method for dyeing textiles.
  • Said textile preferably is a fabric.
  • silicate mineral in the dyeing method, it is possible that in a textile dyed with said method there remain traces of silicate mineral or of a silicate mineral-pigment compound or complex.
  • a textile dyed according to the aforementioned textile dyeing method may comprise at least traces of silicate mineral or of a silicate mineral-pigment compound or complex.
  • FIG. 1 shows a flow diagram of an embodiment of the method for making a compound according to an aspect of the invention.
  • FIG. 2 shows a flow diagram of an embodiment of the method for making a compound according to an aspect the invention.
  • FIG. 3 shows a flow diagram of an embodiment of the method for dyeing textiles according to an aspect the invention.
  • FIG. 4 shows a flow diagram of an embodiment of the method for dyeing textiles according to an aspect the invention
  • a preferred embodiment of a particulate compound according to the invention comprises a silicate mineral and an inorganic pigment, wherein the inorganic pigment is or comprises a mineral, and the silicate mineral is a phyllosilicate or a zeolite.
  • Another preferred embodiment of a particulate compound according to the invention comprises sepiolite and an inorganic pigment, wherein the inorganic pigment is or comprises a mineral.
  • a preferred embodiment of a method for forming a particulate compound according to an aspect of the invention comprises the steps of: in step 101 , mixing particles of a silicate mineral with particles of an inorganic pigment, thereby forming a particulate mixture, wherein the inorganic pigment is or comprises a mineral, and wherein the silicate mineral is a phyllosilicate or a zeolite; in step 102, heating under vacuum the particulate mixture at a temperature of up to about 300°C.
  • a particularly preferred embodiment of a method for forming a particulate compound comprises the steps of: in step 100a, micronizing the silicate mineral and/or the inorganic pigment for forming, respectively, said particles of the silicate mineral and said particles of the inorganic pigment, preferably the micronizing done using a micronizer mill; in step 100b, drying the particles of the silicate mineral, by heating them under vacuum; in steps 100c, in a reactor which comprises a mixer and a vessel, loading, by means of aspiration, the particles of the silicate mineral and the particles of the inorganic pigment; in step 101a, mixing in said vessel the silicate mineral and the inorganic pigment using the reactor’s mixer; and, in steps 102a heating said vessel, thereby gradually heating the particulate mixture at the temperature of up to about 300°C, and in step 102b, maintaining the mixture at said
  • Step 101a may be a part of the aforementioned step 101. Also steps 102a and 102b may be a part of the aforementioned step 102.
  • the particles of silicate mineral are first loaded in the reactor, and then step 100b is done.
  • the compound formation process may be aided by the breaking of certain covalent bonds inside (and around) the silicate mineral, which may in turn promote the bonding of the pigment to the silicate mineral.
  • the raw materials used for making the compound are micronized for reducing the particle diameter. Pulverizing solid raw materials to the nanometer level may be very expensive and slow. Because of this, a reasonable and practical option is aiming for obtaining particles the size of which is 10 microns (pm) or smaller. With particles of such sizes, advantageously the efficiency of the compound formation process is good.
  • the silicate mineral and the pigment are micronized to about 10 microns.
  • segmentation of pigment clusters may take place, which can promote the diffusion of pigment molecules or clusters within channels of the silicate mineral.
  • the micronized product, before used, may be stored in a hopper.
  • the pigment and silicate mineral particles used for making the compound were prepared using a micronizer which works at a rate of 30 kg/h and with a fineness of 10 pm.
  • Said micronizer is a grinding facility and classified with a high-performance filter type Jet for the control of emissions into the atmosphere.
  • the system used has a paddle classifier and a grinding plate with pins or hammers, both turning at different revolutions to obtain the desired granulometric curve.
  • the grinding chamber is protected with a liner that, due to its shape and arrangement, favors the grinding of the product.
  • the entire mill/motor assembly is mounted on a metal base.
  • the raw materials are mixed in a reactor at high temperature and under vacuum.
  • the reactor allows:
  • the silicate mineral in the reactor before mixing the silicate mineral with pigment, the silicate mineral is pre-heated so that it is, at least partially, activated. Hence, in said non-limiting example, there following happens:
  • the silicate mineral/pigment ratio (by weight) is 50%/50%
  • the reactor used in the above non-limiting example comprises a helical vertical mixer which has the following specifications:
  • a preferred embodiment of the method for dyeing textiles comprises the steps of:
  • step 201 comprises: o in step 201a, spraying or showering the aqueous solution on the textile; and o in step 201b, passing the wet textile between two or more cylinders which squeeze the fabric;
  • step 202 comprises: o in step 202a, rolling the textile on a cylinder thereby forming a roll; and o in step 202b rotating said roll, preferably at a constant speed, during the period of time at which the textile remains wet;
  • step 204 comprises: o in step 204a, a first heating step which comprises heating the fabric at first temperature, and maintaining the fabric at said first temperature for a duration of time during which the fabric is not completely dry; and o in step 204b a second heating step which comprises heating the fabric at a second temperature which is higher than the first temperature, for completely drying the fabric; the drying step 204 is followed by step
  • the process is cold, that is, it is not necessary to heat the solution of the compound in water; however, the temperature of the water may vary throughout the year (summer/winter) and this could affect the pick-up of the fabric, so the temperature of the solution is preferably controlled to be about 30°C; the temperature of the solution may also affect the stability of the compound dispersion, and may also affect the “opening” of the fabric; the wetting of the fabric with the solution, is done at a dyeing speed of about 50 m/min with a relatively small water consumption (1 :1 or even 1 :0.5); the proportion of compound ranges between 10-30 g/L of water, depending on the intensity of color sought;
  • the amount of solution is 1 L water/Kg of fabric.
  • the dye is not applied by immersing the fabric in a dye bath, but by spraying or showering; the fabric enters between two cylinders (rollers) through the upper part and is then squeezed between the two cylinders which squeeze it; the amount of dye bath retained by the fabric after the pressure exerted by the rollers determines the "pick-up" (pickup) and determines the intensity of the end color; the pick-up may depend on a number of factors, such as i) the degree of hydrophilicity of the fabric, which can be improved by pre-treatments of the fabric, ii) the fiber type's natural affinity for water, iii) the pressure exerted by the rollers, iv) the speed at which the fabric passes between the rollers; a pick-up value of between 60-70%, means that the wet fabric will weigh 60-70% more than when dry.
  • the fabric after dyeing (applying the solution to the fabric and squeezing the fabric), there is a "maturation" (maturing) stage prior to washing and final drying, for advantageously promoting the adhesion of the pigment and/or compound to the fabric; the fabric is left to mature in cylinders for 24 hours, at a constant speed (i.e.
  • thermosetting oven In a heat-setting oven at 60-100°C/10% RH, the fabric temperature is 55°C and remains constant.
  • Phase 2 At the beginning of the second phase (C - D), the moisture content of the fabric is 20-25%. The fabric temperature rises to 120-160°C and the moisture content drops to zero.
  • the thermosetting oven used advantageously allows: o Programming of the drying time by means of speed/temperature. o An atmosphere free of saturated steam. o Prevention of condensation droplet. o Longitudinal/transverse tension control/rotation of the fabric. once dry, the fabric is softened and dried again.
  • a textile dyed according to the aforementioned method of an aspect of the invention may comprise at least traces of the silicate mineral and/or of the silicate mineral-pigment compound used for the dyeing process. It is further contemplated that at least traces on the textile, may be detected by electron microscopy or a different experimental technique.

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  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Coloring (AREA)

Abstract

Un composé particulaire, le composé comprenant un pigment inorganique et un minéral de silicate qui est un phyllosilicate ou une zéolite, le pigment inorganique comprenant un minéral. L'invention concerne également un procédé de formation d'un composé particulaire, le procédé consistant à : mélanger (101) des particules d'un minéral de silicate avec des particules d'un pigment inorganique, formant ainsi un mélange particulaire, le pigment inorganique comprenant un minéral, et le minéral de silicate étant un phyllosilicate ou une zéolite ; chauffer (102) sous vide le mélange particulaire à une température allant jusqu'à environ 300° C
PCT/IB2023/056608 2022-06-29 2023-06-27 Composé particulaire et procédé de formation d'un composé particulaire WO2024003726A1 (fr)

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EP22382613.2 2022-06-29
EP22382613.2A EP4299827A1 (fr) 2022-06-29 2022-06-29 Composé particulaire et procédé de formation d'un composé particulaire

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Citations (7)

* Cited by examiner, † Cited by third party
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