29 results about "Vat dye" patented technology

The invention discloses a method for dyeing a brocade cotton fabric through vat dye long-vehicle continuous pad dyeing, and belongs to the technical field of printing and dyeing processing and dyeing and finishing engineering. The dyeing method comprises the following steps: padding a brocade cotton fabric semi-finished product in a vat dye liquor, drying, cooling, padding in a vat color developing working solution, and finally steaming, the steamed fabric is subjected to cold water washing, oxidation, soaping, hot water washing, continuous cold water washing and drying finally, and dyeing is completed. According to the invention, a long-vehicle continuous pad dyeing technology is adopted, and synchronous dyeing of the vat dye on two heterogeneous fibers nylon and cotton is realized by padding a reduction developing working solution (the main components of which comprise caustic soda, sodium carbonate, sodium hydrosulfite and industrial salt) and performing steaming developing. The production process is short, the fabric cloth cover leveling property is good, the light fastness is high, and the problem that acid dye dyed chinlon fabric is not resistant to high-temperature washing is solved.

This invention discloses a 1,6-diamino-dibenzo[a,o]perylene-7,16-dione-2,5-disulfonic acid derivative, its preparation method, and its application. Using a vat dye derivative PR177 as the parent material, a 4,4'-diamino-1,1'-dianthraquinone-3,3'-disulfonic acid derivative is formed by the Ullmann condensation of a 1-amino-4-bromoanthraquinone-2-sulfonic acid derivative. This derivative is then cyclically closed via the McMurray reaction to form the 1,6-diamino-dibenzo[a,o]perylene-7,16-dione-2,5-disulfonic acid derivative. This allows for direct dyeing without the use of sodium hydrosulfite. Compared to soluble vat dyes, it is stable when exposed to air. Furthermore, due to its good planarity, it exhibits excellent dyeing performance as an acid dye. It combines the advantages of good directness of vat dyes and good water solubility of acid dyes, especially showing excellent color fastness and exhaustion rate in wool dyeing.

The present application relates to the technical field of dyeing and finishing, and in particular to a weakly alkaline pH reduction dyeing method using N-acetyl indigoidine and a use thereof. It is found in the present application that N-acetyl indigoidine is a novel vat dye, meets the safety assessment requirements for textile dyes, and can be applied to textile dyeing. The present application discloses a weakly alkaline pH reduction dyeing method using N-acetyl indigoidine for textiles; the dyed textiles have significantly improved color depth, brighter color, and good color fastness, and meet the national standards for textile dyeing; and the content of reducing agents is reduced, thereby reducing environmental pollution.

The present invention relates to a fabric printing method and system with reduced dyes, in particular indigo dye. The object of this invention consists in a method for printing a fabric with a dye and a fabric printing system comprising at least one printing module configured to apply dyeing paste to a fabric surface; at least one oxidation chamber comprising an internal cavity filled by an oxidizing gaseous mixture; a fabric-feeding device configured to feed a fabric sheet through the printing module and the oxidation chamber; wherein each printing module comprises a plurality of print heads, at least one main reservoir; a plurality of sub tanks; a main circulation pathway and a recirculation pathway. The proposed invention consists in a fabric printing method and fabric printing system aimed to solve the limitations of industrialized indigo printing.

The invention discloses a preparation method of a red vat dye, and relates to the technical field of compound preparation. According to the preparation method of the red vat dye provided by the invention, a halogenated benzoylation reagent is adopted to replace a primary amino group on an ornamental blue parent nucleus, so that the color of the ornamental blue derivative dye can be adjusted to enable the ornamental blue derivative dye to finally present red; according to the invention, the washing liquor compounded by ethanol, ethyl acetate and petroleum ether in a volume ratio of (1-5): (1-2): 1 is used for washing the reaction product, and based on regulation and control on solubility, surface tension and the like, the purity and the yield of the red vat dye product can be synchronously improved, so that the purity of the product is up to 98.9% or above, and the yield is up to 73.01% or above.

The invention belongs to the technical field of textile printing and dyeing, and particularly relates to a camouflage printing process with high lasting color saturation and fastness and a camouflage fabric, and the printing process is used for sequentially treating the fabric by the following steps: fabric pretreatment, printing and functional after-treatment; the step of printing comprises the following procedures: printing, drying, ageing, baking, reducing and fixing, washing, oxidizing and soaping, fixing and washing; wherein a circular screen printer is adopted for printing, and printing paste comprises acid dye, vat dye, printing paint, an adhesive, a thickening agent and water; in the ageing process, padding in a reducing solution; the functional after-finishing comprises the following procedures: tentering, washing and checking; wherein the tentering process sequentially comprises the steps of padding a finishing liquid and baking and curing. The process is simple and environment-friendly, and the obtained fabric is high in color fastness to washing. The invention also provides the camouflage fabric prepared by the process.

The application discloses a kind of electrocatalytic hydrogenation reduction devices of vat dyes, it is related to electrocatalysis technical field, including cathode groove block and anode groove block, the opposite side of cathode groove block and anode groove block is equipped with electrolytic component in common, the electrolytic component includes first sealing strip, ion exchange membrane, anode material, cathode material, second sealing strip, electrolytic component and cathode groove block and anode groove block are commonly connected with multiple fixed screw between, the rear side of multiple fixed screw rod wall is all connected with fixed nut in thread, the top surface of cathode groove block is equipped with ventilation component.The application solves the problems of low production efficiency, high energy consumption, the need to carry out pure chemical hydrogenation and other problems in the production of existing electrocatalytic hydrogenation reduction of vat dyes, the device catalytic oxidation speed is fast, energy consumption is low, only consumes electric energy, does not add any chemical reagent, no secondary pollution, operation is safe, simple, system operation degree of automation is high, no manpower operation burden.

A plant for dyeing yarn ropes is disclosed, which comprises at least one dyeing machine provided with an openable and / or removable upper lid, at least one device for squeezing the yarn ropes and at least one oxidation pathway in an atmospheric environment of the yarn ropes. Between a point for the entry of the yarn ropes in the at least one dyeing machine and a point for the exit of the yarn ropes from the at least one oxidation pathway there is obtained a first dyeing / oxidation pathway. Between the point for the exit of the yarn ropes from the at least one oxidation pathway and the point for the entry of the yarn ropes in the at least one dyeing machine there is instead obtained a pathway for the return of the yarn ropes, which overlies both the at least one dyeing machine and the at least one oxidation pathway at a predefined height from the ground. Between the point for the entry of the yarn ropes into the at least one dyeing machine and the point for the exit of the yarn ropes from the at least one oxidation pathway there is therefore obtained at least one second pathway for dyeing / oxidising the yarn ropes, which is parallel and coplanar with respect to the first pathway for dyeing / oxidising the yarn ropes, so as to avoid any overlapping of the yarn ropes both inside the at least dyeing machine and at the at least one oxidation pathway.

The description provides an apparatus for dyeing a textile support, the apparatus comprising a single cylinder having, sequentially arranged within therein: a first cavity having a watertight function between the surrounding environment and the cylinder; a first internal partition wall immersed in the lower portion of the dye liquor in the first cavity to facilitate the watertight function; a first dyeing separation chamber and at least one second dyeing separation chamber, each dyeing separation chamber including at least one return roller for the textile support, at least one dispensing device for dispensing dye liquor onto the textile support, and at least one extrusion device; a second cavity containing dye liquor having a watertight function between the cylinder and the surrounding environment; and a second internal partition wall immersed in the lower portion of the dye liquor in the second cavity to facilitate the watertight function. The dyeing apparatus further includes: at least one cover that closes the cylinder at the top and watertightly isolates the dyeing compartment from the surrounding environment; a motorized extrusion and traction device configured to pull the textile support out of the cylinder and remove excess liquid therefrom once it leaves the cylinder; a hydraulic system for feeding the dye liquor into the dispensing device and the cavity; one or more devices for blowing air, designed to increase the oxidation level of the textile support once it leaves the cylinder; at least one ultrasonic generator designed to increase the bath dyeing effect of the dye liquor; and a device for heat-conditioning the dye liquor to further enhance the coloring performance.

The embodiment of the invention discloses a dyeing method of a polyester-cotton core-spun yarn fabric. The dyeing method comprises the following steps: pretreating the polyester-cotton core-spun yarn fabric; mercerizing the polyester cotton core-spun yarn fabric; dyeing the mercerized polyester-cotton core-spun yarn fabric, specifically comprising the following steps: carrying out one-bath bottoming by adopting a bottoming working solution; the bottoming working solution comprises a reactive dye and a vat dye for dyeing cotton fibers, and a disperse dye for dyeing polyester fibers; adopting high-temperature baking to color the polyester fibers with the disperse dye; padding sodium hydrosulfite liquid caustic soda, steaming and oxidizing by saturated steam, and coloring the cotton fibers by using the reduced dye; baking the dyed polyester-cotton core-spun yarn fabric so as to dye the polyester fibers on the dispersed fuel and increase the dyeing of the cotton fibers by the reactive dye at the same time; carrying out steaming reduction treatment on the baked polyester-cotton core-spun yarn fabric so as to fully dye cotton fibers; and finishing the polyester-cotton core-spun yarn fabric subjected to steaming reduction treatment to obtain the polyester-cotton core-spun yarn fabric.

This invention provides a method for dyeing with vat dyes in an overflow dyeing machine. The use of a dye premix significantly improves dyeing performance. The cationic properties of modified cationic starch electrostatically adsorb onto fabric fibers, allowing the coated dye particles to quickly and evenly adhere to the fabric surface. This avoids localized color differences caused by uneven dye dispersion in the dye bath, and the water flow impact in overflow dyeing prevents localized dye aggregation, effectively improving dyeing uniformity and ensuring consistent dyeing results for the same batch of fabrics. The stable structure formed by the cross-linking of modified cationic starch and vat dye forms a protective film on the fabric fiber surface after color fixation, enhancing the binding stability between the dye and fiber, reducing damage to dye molecules from external factors such as light, improving the dye's lightfastness and the fabric's sunlight fastness. Its film-forming properties also make the dye and fiber bond more firmly, preventing fading.

This invention discloses a multi-site ozone catalytic oxidation decolorization tower for wastewater from vat dye production, belonging to the field of industrial wastewater treatment technology. The technical problem to be solved is to improve the contact and mixing efficiency of wastewater and ozone, and to improve ozone utilization and wastewater decolorization quality. The key points of the technical solution are: the main body of the decolorization tower is equipped with a diversion reaction component, a gas conveying component, and an ultrasonic component. The diversion reaction component disperses and conveys the wastewater to multiple Venturi tube assemblies, which form a flow velocity difference. Combined with the spiral blade assembly, the wastewater flows in a spiral. The gas conveying component uniformly delivers ozone, and the ultrasonic component generates ultrasonic waves to promote the reaction. This decolorization tower fully mixes wastewater and ozone through the flow velocity difference, spiral flow, and ultrasonic cavitation. It also realizes ozone recycling and wastewater recycling treatment, and allows for observation of color changes and detection of ozone content. It is suitable for industrial wastewater treatment.

The application provides a clean and efficient electrochemical flow reaction device for vat dyes, which comprises a cathode electrolysis module, an anode electrolysis module and an ion exchange film, the cathode electrolysis module and the anode electrolysis module are arranged on the two sides of the ion exchange film, the outer sides of the cathode electrolysis module and the anode electrolysis module are provided with shell plates, the cathode electrolysis module comprises a cathode functional plate and a cathode plate, the anode electrolysis module comprises an anode functional plate and an anode plate, two pipes for liquid inlet and liquid outlet are arranged on the cathode functional plate and the anode functional plate respectively, the two sides of the ion exchange film are provided with films, the inner sides of the shell plates are provided with insulating plates, and the inner sides of the insulating plates are provided with backing plates. The device has the advantages of simple structure, convenient disassembly, assembly and modification, low cost, easy availability of the materials of the functional plate modules, selection of appropriate functional plates, ingenious design of electrodes, expansion of the electrode plate area, expansion of the electrode area, sufficient contact with the electrolyte, and great improvement of the electrolysis efficiency of the system.

The invention discloses a method for reducing color development difference between an anthraquinone vat dye in a long vehicle and a laboratory, and belongs to the technical field of fabric dyeing. By adopting the treatment process, the color and light difference between a laboratory imitated sample and a long vehicle dyed fabric is obviously reduced, and the international standard is met; in addition, the consistency qualification rate of the long vehicle in the treatment process is increased from 30% to 80% or above, and repair and color hooking work is reduced; meanwhile, pretreatment and dyeing parameters in the treatment process are standardized, the difference caused by different gray fabric specifications is effectively avoided, and the one-time loading success rate is increased.

The embodiment of the application discloses a cellulose fiber and a dyeing method thereof. The method comprises the following steps: mixing strong alkali and sodium dithionite in concentrated ammonia water to obtain a reduction solution; adding vat dyes to the reduction solution, reducing for 10-60 minutes under the environment of 30-50 DEG C, and cooling to room temperature to obtain a vat dyeing solution; adding liquid ammonia to the vat dyeing solution to obtain a liquid ammonia vat dyeing solution; and immersing cellulose fiber into the liquid ammonia vat dyeing solution for dyeing, and then carrying out oxidation and soaping in air to obtain dyed cellulose fiber. The vat dyeing solution prepared by using concentrated ammonia water can be easily mixed with liquid ammonia in any proportion, and the liquid ammonia vat dyeing solution containing different water contents can be easily prepared. In addition, the presence of water in the liquid ammonia vat dyeing solution can maintain the reduction state of the vat dyes in the dyeing process, thereby avoiding the problem that the vat dyes are oxidized and the fiber is not dyed through.

This invention relates to an organic hydrotalcite / polycarboxylate composite paste for vat dye printing on acrylic / viscose blended fabrics, its preparation method, and its application. The paste is prepared by the following method: First, an aqueous solution of polycarboxylate is prepared using acrylic acid, sodium methacrylate, methoxy polyethylene glycol methacrylate, and 2-acrylamide-2-methylpropanesulfonic acid as raw materials; second, hydrotalcite is prepared by reacting magnesium nitrate, calcium nitrate, and aluminum nitrate; then, the hydrotalcite is reacted with sodium dodecyl sulfonate to prepare an organic hydrotalcite; finally, the aqueous solution of polycarboxylate is reacted with the organic hydrotalcite to obtain the organic hydrotalcite / polycarboxylate composite paste. The organic hydrotalcite / polycarboxylate composite paste prepared by this invention is used for vat dye printing on acrylic / viscose blended fabrics. The resulting printed fabric exhibits characteristics such as a desizing rate higher than 92%, good softness, high outline clarity, penetration rate higher than 82%, and high fastness to dry rubbing and washing, showing great application potential.

The invention discloses a high-sunlight-resistance wool dyeing method based on aryl sulfinate. The high-sunlight-resistance wool dyeing method comprises the following steps: dye reduction; cationizing the wool fibers; performing dyeing; and oxidizing. The invention relates to the technical field of textile dyeing and finishing, for the first time, aryl sulfinate with high-efficiency reducing capacity and environment-friendly characteristic is introduced into a vat dye chromosome system of wool, and synergistic interaction is realized by combining a technology of cationizing and modifying wool fibers with a polyquaternium cationic auxiliary agent. The efficient dyeing of the vat dye on the wool is realized under mild process conditions, and meanwhile, the wool fiber performance is protected to the maximum extent.

The invention discloses acid / reduction printing paste and a method for preparing a cotton / nylon interwoven fabric by using the acid / reduction printing paste, and relates to the technical field of textile manufacturing, and the acid / reduction printing paste comprises the following components in parts by weight: 1%-3% of acid dye, 1%-4% of reduced dye, 0.2%-3% of printing-bleaching black, 10%-30% of an adhesive, 20%-40% of sodium alginate paste, 3%-8% of a thickening agent and the balance of water. The cotton / nylon interwoven fabric prepared by using the acidic / reduced printing paste not only has high strength, high wear resistance and anti-infrared performance, but also has a waterproof function, is uniformly dyed, improves the protective property and use comfort of the cotton / nylon interwoven fabric, and can be applied to preparation of military uniform.

The application discloses a kind of preparation and application method of vat dye electrochemical vat dyeing electrode, comprising the following steps: step one, copper foil is pretreated using electrochemical polishing: step two, using quartz tube in CVD furnace as reaction chamber, temperature is pre-calibrated: step three, copper foil is placed into reaction chamber and vacuumized: step four, tube furnace is heated and copper foil is annealed under set pressure for 10 minutes: step five, after annealing, gas pressure is increased, 10sccm CH4 is introduced to grow carbon nanotube, after growth, copper foil is removed and cooled: step six, 1nm Fe catalyst is sequentially deposited on the surface of grown graphene on top of graphene, then buffer layer is evaporated by electron beam: step seven, carbon nanotube array is grown on G / Fe / Al2O3 surface, substrate G / Fe / Al2O3 is annealed, while tungsten wire is ignited to 30W to start growing carbon nanotube: step eight, preparation is completed, sample is taken out, solve the problem of low current efficiency, long reduction time, low dye reduction rate and poor dyeing effect of traditional process.

The invention describes asymmetric supercapacitor device consisting of two six-finger (1.5 mm x 11.0 mm) interdigitated polyimide-based laser-induced graphene electrodes, mounted on a polyethylene terephthalate substrate and interconnected with a polyvinyl alcohol / sulfuric acid gel electrolyte. The laser-induced graphene electrodes are post-modified with carbon black microparticles and Prussian blue inorganic redox dye. According to the present invention, the incorporation of carbon black microparticles and Prussian blue inorganic redox dye significantly enhances the electrochemical performance and energy density of the developed supercapacitor. This improvement also increases the device’s flexibility and versatility, making it highly applicable across various industrial sectors that require rapid energy storage and release, such as flexible electronic devices, smart textiles, and wearable sensors.

The application provides an electrochemical vat dyeing device and method. The electrochemical vat dyeing device is provided with a cathode chamber and an anode chamber, a cathode plate is arranged in the cathode chamber, and an anode plate is arranged in the anode chamber; a PES film coated with nano-particles is used as a diaphragm between the cathode chamber and the anode chamber; wherein the nano-particles include Ti4O7 nano-particles, CeO 2‑x at least one of ZrO2 nano-particles and CeO2 nano-particles, 2>x>0, and 2>y>0. 2‑y The electrochemical vat dyeing device provided by the application uses a PES film coated with ZrO2 nano-particles as a diaphragm, replaces a traditional Nafion film, and can be well applied to an electrochemical vat indigo process and is a good electrochemical vat indigo dyeing device. The electrochemical vat dyeing device provided by the application is used in an electrochemical vat indigo process, and realizes high current efficiency for electrochemical vat indigo under the premise of high-efficiency isolation of leucoindigo at low cost.

The application relates to the dyeing and finishing technical field, in particular to a weak-alkali pH reduction dyeing method using N-acetyl indigo and application thereof, and discloses that N-acetyl indigo is a new type of reduction dye, meets the safety identification requirements of textile dyes, and can be applied to textile dyeing. The application discloses a weak-alkali pH reduction dyeing method using N-acetyl indigo, the dyed textile has a significantly improved color depth, a more brilliant color shade, good color fastness, meets the national standard of textile dyeing, and reduces the content of a reducing agent and environmental pollution.

The application discloses a kind of fused ring type compounds and active vat dyes for supercritical CO2 fluid dyeing, preparation method. Diphenyl bipyrrolequinone halogenated compound, alkyl amine compound is dissolved in organic solvent, and base agent, copper catalyst is added, and a kind of fused ring type compound is obtained by reaction, it has active reaction group and fused ring ketone conjugated structure, used as the precursor of active vat dye, the prepared dye its color parent is fused by six benzene rings, coplanarity is good, and the directness to fiber is better, and color light is stable, suitable for supercritical CO2 fluid dyeing.The active group of fused ring type active vat dye provided in the application is mainly fixed by nucleophilic addition reaction with fiber, avoid the damage caused to equipment or reduce the dyeing rate and bonding stability of cotton in supercritical CO2 fluid by the acid generated in fixing reaction.The dyeing process is green and environmentally friendly, friendly to equipment and environment, and has better application prospect in supercritical CO2 dyeing.

The present application relates to a kind of method for improving the dyeing fastness of polyphenyl sulfide fiber, comprising the following steps: 1, phosphate starch, defoaming agent, ethylene glycol phenyl ether and fatty alcohol polyoxyethylene ether sodium sulfate are mixed, stirring and heating to 95 DEG C or more, preparation obtains dyeing liquid;2, in dyeing liquid, polyphenyl sulfide fiber, sodium chloride and glacial acetic acid are then put into dyeing machine and dyeing, washing and drying after obtaining dyed polyphenyl sulfide fiber.The esterification degree of 2-3 phosphate starch used in the present application has good affinity to hydrophobic polyphenyl sulfide fiber, and under high temperature dyeing conditions, the vat dye soluble in ethylene glycol phenyl ether is more easily combined with fiber, enters the inside of fiber, improves dyeing effect, realizes the dyeing depth of excellent vat dye dyeing polyphenyl sulfide fiber, and then reaches the effect of high color depth and high light fastness of vat dye dyeing polyphenyl sulfide fiber.

The application discloses a kind of mycelium pure leather preparation methods, belong to new material technical field.The application utilizes physical or chemical method to mycelium, finally obtains the pure leather of performance strength and animal leather comparable and environment-friendly.Mainly divided into following steps: the harvested fresh mycelium material is deacetylated, filled, reduced dye dyeing, then crosslinking plasticizing, then spraying coloring further color fixing, finally coating finishing.The application causes little pollution to environment in fermentation process and preparation process, and production cycle is short, and production cost is low.

The utility model belongs to the technical field of dyeing equipment, and particularly relates to a vat dye feeding device which comprises a first dye tank and a second dye tank, the first dye tank and the second dye tank are both connected with a nitrogen pipeline, and a pressure regulating valve is arranged on the nitrogen pipeline. Discharging ports of the first dye tank and the second dye tank are connected with the dyeing machine through charging pipelines, charging valves are arranged at the discharging ports of the first dye tank and the second dye tank, and charging pumps are arranged on the charging pipelines. The two dye tanks are arranged, the feeding valve of the discharging port of one dye tank is opened firstly during dyeing, the feeding valve of the other dye tank is opened when dye in the dye tank is almost used up, the feeding valve of the first dye tank is closed, feeding is carried out, and continuous feeding is carried out in such a way. Nitrogen is introduced into the dye tank and used for preventing dye liquor from being oxidized by air, and it is guaranteed that the colors of the same batch of cloth are uniform.

The invention discloses a preparation method of a chinlon 66 / cotton blended printed fabric. The preparation method of the chinlon 66 / cotton blended printed fabric comprises the following steps: 1) pretreating the fabric by adopting a desizing-scouring-bleaching one-bath method, and performing high-temperature pre-shaping; (2) printing the fabric treated in the step (1); wherein the printing paste for printing is a mixture of printing paste, paint, a paint printing synergist, an adhesive, urea, ammonium sulfate, vat dye and acid dye; (3) baking the fabric printed in the step (2) at high temperature; (4) firstly ageing the fabric printed in the step (3), and then carrying out reduction ageing; 5, the fabric aged in the step 4 is sequentially subjected to water washing, oxidation, soaping and secondary water washing, and then the chinlon 66 / cotton blended printed fabric is obtained.The printed product is uniform in color, clear in pattern outline, quite excellent in color fastness, high in dye uptake, capable of improving the rubbing color fastness and the soaping color fastness and capable of enhancing washing fastness.

The invention relates to a method for modifying the surface of an alkali metal, such as lithium, for use in electrochemical cells and batteries. The described method alters the surface of the alkali metal by means of at least one organic compound previously deposited on a support. The organic compounds belong to the family of polycyclic aromatic molecules, quinones and / or vat dyes.