37results about How to "Increase the percentage of dyeing" patented technology

The invention belongs to the field of light chemical industry and relates to a method for improving the dyeing performance of polyimide fiber basic dyes. That is, under the action of a catalyst, the polyimide fiber is modified by carboxylation, and then the carboxylated polyimide fiber is dyed by adding a carrier in the basic dyeing bath. Under the action of the catalyst, the terminal anhydrides of the polyimide fiber molecules are hydrolyzed into carboxyl groups, which can increase the dyeing seat, and the cations on the dye molecules can be ionically bonded with the carboxyl groups generated by the hydrolysis of the fiber molecule terminal anhydrides. The method of the present invention can effectively improve the Deep dyeing and color fastness of polyimide fiber dyed with basic dyes.

The invention discloses a dyeing method for improving the color fastness of a polyester woven ribbon, and belongs to the technical field of woven ribbon dyeing. The method comprises the following steps of (1) cold plasma processing, (2) microwave processing, (3) woven ribbon incoming cleaning, (4) dyeing in a coloring tank, (5) drying for color development and (6) treatment by using treatment liquid. The color fastness to rubbing and color fastness to pressure of polyester dyed through the dyeing method are basically the same, and both can reach level 5, under the physical action, the color remains firm, and the K / S value is obviously higher than that of a control group; accordingly, the good leveling property and high dye uptake are achieved, and the problem that nowadays, the polyester woven ribbon is difficult to dye is well solved.

The present invention relates to a soybean protein fiber dyeing adjuvant. It is characterized by that it contains 0.50-0.8% (on weight of fabric) of alkyl-polyoxyethylene non-ionic surfactant, 10-30g / l of anhydrous sodium sulfate, it uses formic acid to regulate pH value of dye bath to 4.5-5.5, then uses caustic soda to regulate pH value of dye bath to 11. Besides, in said adjuvant 0.25-0.505 (onweight of fabric) of aluminium salt is also contained; the described aluminium salt is any one of aluminium sulfate, aluminium trichloride and alum or their mixture. Said invention also provides the concrete steps of said dyeing process by using said dyeing adjuvant and soybean protein fiber.

The invention discloses a method for improving illumination fastness of a THPC flame-retardant fabric. The method comprises the following specific technological processes: turning and sewing of gray cloth; desizing, boiling-off and mercerizing; stentering; flame-retarding; oxygen low-temperature plasma treatment; dyeing; washing and drying; stentering; preshrinking; and checking and packing. The desizing, boiling-off and mercerizing process is implemented fully until pH of eluant of the grey cloth is smaller than or equal to 7, a flame-retarding process successively comprises padding of THPC flame retardant working liquid, ammonia fuming, oxidation washing and drying and stentering, the concentration of THPC flame retardant in the THPC flame retardant working liquid is higher than a normal value by 8-10%, in an ammonia fuming process, the flow velocity of ammonia is 500-700 mL / s, and ammonia fuming time is not less than 5 seconds. The wicking capability of the treated THPC flame-retardant fabric is improved by 5-6 times, surface polar groups (-OOH, -OH, and -C=O) are remarkably increased, the dyeing percentage of dyestuff is multiplied, and demands of customers to the color are met well.

The invention discloses a preparation method and an application method of a low-temperature low-chromium dyeing auxiliary agent of an acidic medium dye for wool. The preparation method comprises the steps that: 1, protein powder is prepared by using waste duck feather, wherein (1) the duck feather is subjected to pretreatment; (2) the suck feather is subjected to a dissolving treatment; and (3) duck feather protein powder is prepared; 2, a sodium hydroxide solution is prepared, and the sodium hydroxide solution is used for dissolving the duck feather protein powder; 3, sodium hydroxide, triethanolamine, and epichlorohydrin are adopted for preparing a cationic quaternary ammonium salt cross-linking modification agent WLS; and 4, the low-temperature low-chromium dyeing auxiliary agent for the acidic medium dye is prepared. The auxiliary agent can be used as a wool modification agent. After wool fibers are modified, wool fiber dyeing properties of acidic medium dyes are greatly improved, dye uptake percentage rate can be improved, mordant absorption performance of the dye is improved, chromium pollution in dye wastewater is reduced, wool fiber low-temperature low-chromium dyeing is realized, and waste duck feather keratin is effectively utilized. After modification, the wearability of wool products is improved.

The invention discloses a dyeing method with low waste water discharge of wood meal for a colorful wood-plastic composite material with high fastness. The dyeing method comprises the following steps of: step 1, carrying out graft modification treatment on the wood meal for the wood-plastic composite material by a positive ion modifier; step 2, directly dyeing the wood meal subjected to the graft modification treatment by a dye in a sun-proof series; step 3, washing the dyed and dehydrated wood meal with hot water once so as to remove non-sessile dye and improve the fastness of the dyed wood meal; and step 4, adding residual dyeing liquid with the dye concentration consistent to that of the dye in the step 2 into the modified wood meal in the step 1, dyeing the modified wood meal with the residual liquid by a dyeing method in the step 2, and washing the dyed wood meal according to the step 3, and circulating the step 1 to the step 4. With the adoption of the dyeing method provided by the invention, the dye enters the inner part of fibers of the wood meal, and is not only adhered to the surface of the wood meal, so that the coloring force can be improved, and the bright colorful wood-plastic material can be obtained. The dyeing method can be used for improving sun-proof fastness and the water immersion fastness of the dyed wood meal or the wood-plastic material.

The invention relates to a dyeing method for blended and interwoven fabric of cotton fiber, linen fiber and wool fiber. The method includes (1) soaking the blended and interwoven fabric in water, adding a refining agent, penetrant and sodium carbonate, heating, keeping warm, injecting water, adding acetic acid, heating and keeping warm; (2) soaking the fabric processed through the step (1) in water, adding a wool resist agent and mirabilite, heating, keeping warm and discharging dye liquid; (3) soaking the fabric processed through the step (2) in water, then adding a soaping agent, heating, keeping warm, cooling, discharging liquid and washing; (4) soaking the fabric processed through the step (3) in water, then adding sodium carbonate, sodium chloride and a dye-fixing agent, heating, keeping warm and finally washing, dewatering, drying and fixing patterns softly. The dyeing method is low in dyeing temperature and simple to operate and has a low requirement on a device. The blended and interwoven fabric of the cotton fiber, the linen fiber and the wool fiber and dyed through the method has good dyeing homochromatic property and color fastness, is good in moisture absorbing and perspiration performance and is skin-friendly fabric.