59results about How to "Strong color fixing ability" patented technology

The invention relates to an azo active material preparing process, where 2-amino-1.5-naphthalene disulfonic acid reacts with the added hydrochloric acid and sodium nitrite to form a diazo salt component; tricyanogen chloride, water and disodium hydrogen phosphate are fully mixed on condition of adding lubricant to form a suspension, dripping 4-(beta-hydroxyvinyl sulfone sulfate) aniline solution in the suspension, then adding sodium hydroxide solution to the suspension to make pH value of the suspension maintained between 3.5 and 4, and maintaining the reaction to the terminal; raising the temperature to 20-25 deg.C, adding in sodium hydroxide solution to regulate the pH value to 5-5.5, dripping in 2-amino-5-naphthol-7-sulfonic acid, and maintaining the pH value at 3-7 and the temperature at 25-40 deg.C, reaction, obtain a coupled component solution; adding the above diazo salt to the coupled component solution for making coupled reaction at the temperature of 0-60 deg.C and the pH value regulated to 3-7, reacting, eliminating the salts through ionic film and obtaining the azo active material. The advantages are high reacting activity, good color fixing ability and excellent improving performance.

The invention discloses a method for dyeing down feather. The method for dyeing the down feather comprises the following steps: separating the raw material feather into waste feather, feather slices and down clusters by using a feather separator; removing dust of the separated feather slices and the down clusters, adding the feather slices and the down clusters subjected to dust removal into a scouring machine for souring, subsequently dyeing the soured down feather, simultaneously dyeing and adding a levelling agent, dye and a color curing agent, and enabling the down feather to have different colors through the dyeing process. Through the method for dyeing the down feather, the conventional view that the down feather only has white color and gray color is broken, so that the genuine down feather is obtained; the theoretical basis is provided for the market innovation of the down feather industry.

The invention relates to a process for printing and dyeing artificial leather by using mangosteen bark juice, comprising the following steps: a, preparing a mangosteen bark dye: taking mangosteen bark, performing superfine grinding to obtain the mangosteen bark juice, then adding ethyl alcohol with the concentration of 80 percent, dipping for 12-24h, filtering with a sieve of 80-100 meshes, and collecting filter liquor, wherein a ratio of the volume of the ethyl alcohol to the mass of the mangosteen bark is (5 to 10) : 1; dipping filter residues by adopting the same ethyl alcohol for 12-24h, filtering with a sieve of 80-100 meshes, and collecting filter liquor; combining filter liquor obtained by two times of collecting, concentrating, and vacuum-drying to obtain the solid, i.e., the mangosteen bark dye; b, preparing a dye; c, treating the artificial leather; d, dyeing; e, heating for evaporation; f, performing afterfinish. The printing and dyeing process can improve the attachment of the vegetable dye on leather, so that the printed and dyed leather is not easy to fade.

The invention relates to a method for preparing colorful recombined tobacco leaf paper by microencapsulation of coating liquid. According to the method, substances such as pigments, a combustion improver and spices in the coating liquid are wrapped by a microencapsulation technology to prepare a core material, ethyl cellulose, hydroxypropyl cellulose and the like are adopted as wall materials, a complex coacervation method is adopted for preparing coating liquid microcapsules, and the coating liquid microcapsules are applied to recombined tobacco leaf paper in an airblade coating way to prepare the colorful recombined tobacco leaf paper. The colorful recombined tobacco leaf paper is good in color-fixing capability and free from fading, has slow-releasing and fragrance-keeping effects, and can be effectively improved in appearance quality and smoking quality.

The invention relates to a composite active black dye, which is characterized in that the dye is compounded by four dyes shown in formula (1), formula (2), formula (3) and formula (4) according to parts by weight of 80-84, 6-10, 1-3 and 6-10, has high responsiveness, good color fixing capability and excellent deep dyeing property, and is suitable for dyeing cotton fiber.