31results about How to "Reduce dye content" patented technology

The invention provides a dopamine-assisted dyeing high performance fiber, yarn or fabric and a preparation method thereof, in order to overcome the defects of single color and difficulty in dyeing ofthe present high performance fibers. The preparation method comprises the following steps: putting the cleaned high performance fiber, yarn or fabric into a dopamine Tris solution treating bath, treating for 5-120min, and then cleaning and drying, and performing dyeing treatment, thereby acquiring the dopamine-assisted dyeing high performance fiber, yarn or fabric. According to the invention, theprocess is simple, safe, efficient and harmless to mechanical properties of fiber main body, and meanwhile, the dyeing performance of fiber is obviously promoted, the dyestuff universality is high andthe development of colored high performance fiber product can be boosted.

The invention discloses a reactive dye and a preparation method thereof. In order to achieve the above purpose, the reactive dye is prepared from a reactive dye and hydroxy amide carboxylate in a molar ratio N of 0.1: 1 to 2: 1, wherein the hydroxy amide carboxylate is prepared by neutralizing the pH value of a reaction product of hydramine and dicarboxylic anhydride in an equal molar ratio in a solvent to 8-10 by an alkaline solution. The method for preparing the reactive dye comprises the following steps: (1) taking the hydramine and the dicarboxylic anhydride in equal molar ratio to carry out amidation, neutralizing by using the alkaline solution until pH value is 8-10, and removing the solvent to obtain the hydroxy amide carboxylate; (2) reacting the hydroxy amide carboxylate with the reactive dye, and drying and grinding the product to obtain the reactive dye. The reactive dye and the preparation method of the reactive dye can be used for solving the problem that the existing reactive dye is hard to be applied in the leather dye; meanwhile, the color fastness of the leather is improved; the concentration of the residual dye of the dye waste solution is improved.

The invention provides a cold pad batch processing method of cotton fibers through a pre-treatment dyeing one-bath method. The cold pad batch processing method is characterized by comprising: padding raw cotton loose fibers into impregnation liquid; after padding, stacking at a room temperature for 8h to 20h; washing with hot water at 70 DEG C to 80 DEG C and soaping; washing with cold water and drying, wherein the impregnation liquid contains 10g/L to 80g/L of an active dyestuff, 3g/L to 5g/L of a pre-treatment auxiliary agent, 30g/L to 100g/L of a co-solvent, 5g/L to 18g/L of an alkali agent and 20g/L to 50g/ of sodium sulfate, and the alkali agent is one or a compound of more of sodium silicate, sodium carbonate, sodium phosphate and sodium hydroxide. A cold pad batch treatment process provided by the invention is carried out at a room temperature, a formula is simple and the operation is convenient; raw cotton does not need to be independently pre-treated; the auxiliary agent is added and pre-treatment and dyeing can be carried out in one bath, so that the cost is reduced; damage to the fibers is small and the hand feeling is good; the utilization rate of the dyestuff is high, less sewage is discharged, and energy saving and emission reduction are realized.

The invention discloses a dye stirring apparatus of fabric printing and dyeing equipment. The dye stirring apparatus comprises a housing, inside which a stirring chamber is arranged. A base plate is arranged on the inner wall of the bottom of the stirring chamber. A motor is arranged on the bottom of the stirring chamber. 4-6 vertical cylinders are inserted in the bottom of the stirring chamber. Apiston is arranged inside each cylinder. A spring is installed on the top of each piston. One end of each spring, far from the piston, is fixed on the inner wall of the top of the cylinder. The top of each cylinder is in threaded connection with a water outlet interface, and the bottom of the cylinder is in threaded connection with an air inlet interface. The bottom of the stirring chamber is provided with a connecting pipe. The top of the housing is equipped with a feed inlet. According to the invention, the stirring effect of dye preparation can be enhanced, and the content of dyes which are not completely stirred but deposited at the bottom during stirring can be reduced as much as possible. By the dye stirring apparatus, working efficiency is improved.

The invention belongs to the technical field of light industries, and particularly relates to a modification method for a reactive dye for leather. The modification method for the reactive dye for leather is characterized in that a product applied to the dyeing of leather and products thereof is obtained by reacting the reactive dye with one or more of hydroxycarboxylic acid or salts thereof, amino acid or salts thereof and oligopeptides and introducing carboxyl groups into reactive dye molecules. According to the method, the application fields of the reactive dye are extended, the performance of leather, such as dyeing fastness, washing durability and sweat resistance, can be effectively improved, the utilization rate of the dye can be increased, and the dye content of wastewater can be reduced.

The invention relates to an acidic dye dyeing method of cotton textiles. The acidic dye dyeing method comprises the following steps: treating the cotton textiles with a carboxylated carbon cationic polymer nano-ball solution; and after adding an acidic dye for dyeing, carrying out fixation treatment. A preparation method of carboxylated carbon nano-balls comprises the following steps: after mixing carbon nano-balls and an acidic solution, carrying out ultrasonic treatment; after standing and immersing, heating, condensing and reflowing; and repeatedly washing with water and separating until the pH is neutral. The carboxylated carbon cationic polymer nano-ball solution is used for modifying the acidic dye so that the cotton textiles are treated by using the cationic polymer nano-balls, and furthermore, the acidic dye dyeing is realized and the problems that the water resistance, sunlight resistance and wear resistance of the dye are poor, the content of the dye in dye wastewater is relatively high and the like are overcome.

The invention provides a salt-free cold pad batch dyeing method for uncooked and unbleached cotton fibers, and belongs to the field of cotton fiber printing and dyeing. The salt-free cold pad batch dyeing method includes putting reactive dye and alkaline substances in a mixed solution of an alcoholic organic solvent-water system to obtain dyeing liquid; putting the uncooked and unbleached cotton fibers in the prepared dyeing liquid, and performing padding by a double-dip-double-nip method; rolling the dyed uncooked and unbleached cotton fibers on a rolling machine, wrapping the rolled uncookedand unbleached cotton fibers with a plastic film, and performing rotating and stacking; after stacking, performing soaping, hot water washing, cold water washing and drying. The method has the advantages that the characteristics of high dyeing speed and high dyeing rate of the dye in an ethanol-water system are combined, the uncooked and unbleached cotton fibers can be quickly dyed by the reactive dye under the action of high permeability of ethanol according to a padding method, the dyed cotton fibers can be covalently bonded with hydroxyl groups on cellulose slowly under the condition of normal-temperature stacking to carry out dyeing, and the color fixation rate of the reactive dye in the alcoholic organic solvent-water system is increased under normal temperature conditions.

The invention relates to the technical field of dyeing and finishing, in particular to a nylon cheese and a dyeing method thereof, the nylon cheese is dyed by a first dye, the dye utilization rate of the first dye is not less than 95%, and the leveling property is 4-5 grade. According to the scheme, when the non-aqueous medium is used for dyeing the nylon cheese, the utilization rate of the dye can be increased (up to 95% or above); the level dyeing property of dyeing is improved; no extra salt is added during dyeing, so that the alkalinity is reduced; and dyeing wastewater is reduced, so that the dyeing wastewater is simple to treat, and the recycling rate of the dyeing wastewater is increased.

The invention discloses a printing and dyeing sewage filter material containing a mesoporous material and a preparation method of the printing and dyeing sewage filter material. The filter material ischaracterized by comprising binchotan fibers, bamboo carbon fibers and a basalt base material part, and through loading the three filter components with a mesoporous molecular sieve, the specific surface area of a filter tip and a micro pore channel are increased. The filter material prepared by the preparation method disclosed by the invention is used for wastewater treatment of a textile printing and dyeing enterprise and has the advantages of being high in decolorizing rate, high in dye and metal ion adsorbability, free from environmental secondary pollution, green, environmentally-friendly and the like; and the preparation method is simple in process and has a good application prospect.

The invention relates to the technical field of dyeing and finishing, in particular to regenerated cellulose fiber cheese and a reactive dye dyeing method thereof. The regenerated cellulose fiber cheese is dyed by reactive dye, the soaping fastness of dyeing of the regenerated cellulose fiber cheese under the national standard GB/T 3921-2008 is grade 4-5, the dry rubbing fastness under the national standard GB/T 3920-2008 is grade 4-5, the wet rubbing fastness is grade 3-4, and the color depth under the national standard GB/T 4841.7-2006 can reach 2/1 standard depth.

The invention relates to the technical field of dyeing and finishing, in particular to linen cheese and a reactive dye dyeing method thereof. The linen cheese is dyed by reactive dye, the soaping fastness of dyeing of the linen cheese under the national standard GB/T 3921-2008 is grade 4-5, the dry rubbing fastness of dyeing of the linen cheese under the national standard GB/T 3920-2008 is grade 4-5, the wet rubbing fastness of dyeing of the linen cheese under the national standard GB/T 4841.7-2006 is grade 3-4, and the color depth of dyeing of the linen cheese under the national standard GB/T 4841.7-2006 can reach 2/1 standard depth.

The invention relates to the technical field of dyeing and finishing, in particular to a silk fiber cheese and a dyeing method thereof. The silk fiber cheese is dyed by a first dye, the soaping fastness of the dyeing of the silk fiber cheese under the national standard GB/T 3921-2008 is grade 4-5, the dry rubbing fastness under the national standard GB/T 3920-2008 is grade 4-5, the wet rubbing fastness is grade 3-4, and the color depth under the national standard GB/T 4841.7-2006 can reach 2/1 standard depth.

The invention relates to the technical field of rib fabrics, and discloses a rib heating fiber fabric. A preparation method of the rib heating fiber fabric comprises the following steps of S1, performing weaving: selecting proper yarns to weave a fabric; S2, performing dyeing: putting the woven fabric into a dyehouse for dyeing; S3, performing softening finishing: softening the fabric by adopting a one-dipping and one-rolling process; S4, performing drying: firstly primarily wringing out moisture in the fabric, and then putting the fabric into a drying cylinder for drying; S5, performing heat setting: after the fabric is subjected to heat treatment for a period of time, rapidly cooling the fabric to enable the fabric to be formed; and S6, performing singeing. According to the invention, kapok fibers and soft silk protein fibers are used in cooperation, so that the fabric has good heating and heat retention properties and comfort; meanwhile, through a low-temperature dyeing accelerant, the dye-uptake rate of dye to the fibers is improved and the dyeing preparation time of the fabric is shortened; and the fabric can be smoother and brighter through the softening treatment step.

The invention relates to the technical field of dyeing and finishing, in particular to a cotton cheese and a reactive dye dyeing method thereof. The cotton cheese is dyed by a reactive dye, the soaping fastness of the dyeing of the cotton cheese under the national standard GB/T 3921-2008 is grade 4-5, the dry rubbing fastness under the national standard GB/T 3920-2008 is grade 4-5, the wet rubbing fastness is grade 3-4, and the color depth under the national standard GB/T 4841.7-2006 can reach 2/1 standard depth.