10results about How to "Improve light fastness" patented technology

The invention discloses a printing process of a brocade-cotton blended camouflage fabric. The production process comprises the following steps: pretreatment, printing, steaming and baking, reduction soaping and color fixation, sizing, tentering and color fixation, preshrinking and the like. The camouflage printed fabric prepared by the process has the advantages of color fastness to light (dark color grade 6 or more and light color grade 5 or more), composite color fastness to light and sweat (grade 4-5), color fastness to dry rubbing (grade 4-5), color fastness to wet rubbing (grade 2.5-4), color fastness to washing (grade 4-5), color fastness to perspiration (grade 4-5) and color fastness to hot pressing (grade 4-5), excellent color fastness and uniform color fixation. Meanwhile, the produced camouflage fabric can control the reflectivity of light rays in a near-infrared light region (760-1200 nm) within a required range, so that the fabric has excellent infrared monitoring prevention performance and camouflage effect. The seven-color camouflage fabric printing is achieved, colors are richer, the camouflage effect is better, and the requirements of military garments are better met.

The invention relates to the technical field of textiles, in particular to denim with ozone fastness resistance and a preparation method thereof. The preparation method comprises the following steps: S1, uniformly mixing an amino-terminated hyperbranched polymer and deionized water, heating to 70-80 DEG C, dropwise adding a mixed solution of a cationic modifier and deionized water within 1-2 hours, carrying out heat preservation reaction for 3-5 hours, and carrying out precipitation separation and drying to obtain an ozone-resistant color fastness improver; s2, uniformly mixing an ozone-resistant color fastness improver and deionized water to obtain a finishing solution; s3, immersing the denim into the finishing liquid, heating to 50-60 DEG C, treating for 30-50 minutes, taking out, dehydrating, and baking for 3-5 minutes at 100-150 DEG C to obtain the denim with ozone fastness, the denim not only has excellent ozone resistance, but also has excellent ultraviolet protection effect and antibacterial effect, and the service life of the denim is prolonged.

The invention provides a phthalocyanine sulfonamide derivative dye as well as a preparation method and application thereof, and belongs to the technical field of phthalocyanine series dyes. The structural general formula of the phthalocyanine sulfonamide derivative dye is (PC)-(SO2-N-X) z-(SO3R) y, PC is a phthalocyanine or metal phthalocyanine group, X is hydrogen, C1-C14 alkyl, hydroxyalkyl, aralkyl or aromatic group, R is hydrogen, C1-C4 alkyl or amine salt cation, the value range of z is 1-4, the value range of y is 1-3, and the sum of z and y is less than or equal to 4. According to the invention, the sulfonamide group and the sulfonic acid group are introduced at the same time, so that the prepared derivative dye has excellent organic solvent solubility and water solubility, and the problem of single solubility of the traditional zinc phthalocyanine dye is effectively solved.

The invention discloses a light fastness improver for an acid dye as well as a preparation method and application of the light fastness improver. The light fastness improver is prepared from the following components in parts by mass: 30 to 72 parts of benzotriazole or triazine ultraviolet absorbent; 5-25 parts of a dispersant; 1-6 parts of a solvent; and the balance of water. The preparation method comprises the following steps: firstly, uniformly mixing the dispersing agent, the solvent and the water, adding the mixture into the ultraviolet absorbent, putting the mixture into a mixing kettle or a grinding machine, and stirring and mixing for 0.5-2 hours or grinding for 4-8 hours at room temperature to prepare the light fastness improving agent. The light fastness improver disclosed by the invention is attached and permeated on a fabric for dyeing an acid dye through a dyeing one-bath method or a padding method, so that the light fastness of the fabric is obviously improved. And after treatment, the influence on after-finishing processing is small.

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.

The invention discloses a coloring agent and an intermediate thereof, and a preparation method and application thereof, and belongs to the technical field of polymer coloring agents. The preparation method of the intermediate comprises the following steps: carrying out reduced pressure distillation on the polymer polyol and the modified color at 100-105 DEG C until the water content is less than or equal to 0.1%; cooling to 40-60 DEG C, adding part of the solvent, then adding diisocyanate and a catalyst, and reacting for 1.5-3 hours when the internal temperature reaches 80-90 DEG C; cooling to 40-60 DEG C, adding part of the solvent, then adding micromolecular dihydric alcohol to carry out chain extension reaction, and reacting for 2-3 hours when the internal temperature reaches 70-85 DEG C; and adding a terminating agent, adding the residual solvent, and reacting for 0.5-1.5 hours when the internal temperature is 70-80 DEG C. According to the method, the colorant intermediate capable of improving the light resistance and migration resistance of the colorant can be obtained; the colorant prepared from the intermediate and an acrylic monomer is especially suitable for automobile leather.

The invention discloses a printing method of meta-position aramid fiber blended fabric. The meta-position aramid fiber blended fabric comprises raw material aramid fiber blended fabric; the method comprises the following specific steps: (1) material treatment: boiling off the aramid fiber / cotton blended fabric on a boiling-off machine; when the aramid fiber blended fabric is the aramid fiber / cotton blended fabric, semi-mercerizing is needed, and the dyeing performance and the gloss of the blended cotton fiber are further improved; (2) padding the aramid fiber blended fabric with an anti-solarization finishing agent and a flame-retardant cross-linking agent by using a hot-melt dyeing bottoming machine; (3) printing various color spots of the aramid fiber blended fabric by using a rotary screen printing machine; (4) performing saturated steaming and color fixation by using a long-ring steamer or a bottomless long-ring steamer; and (5) cleaning the color-fixed aramid fiber blended fabric by using a soaping machine, and drying after cleaning to obtain a meta-aramid fiber blended fabric finished product. Before printing, the fabric is padded with an anti-ultraviolet finishing agent, and the color fastness to sunlight after printing is improved to a certain extent.

The invention discloses a printing preparation method of a meta-position pure aramid fiber fabric. The printing preparation method comprises the following specific steps: (1) lightly scouring the meta-position pure aramid fiber fabric on a scouring machine, washing with water and drying; (2) padding the meta-position pure aramid fiber fabric subjected to light refining treatment by using a hot melting bottoming machine and adopting a multi-dipping and one-rolling process, and adding an anti-ultraviolet finishing agent and a flame-retardant cross-linking agent into dipping treatment liquid, so as to further improve the anti-solarization capability of the aramid fiber fabric; (3) printing each color spot of the meta-position pure aramid fiber fabric by using a rotary screen printing machine and two color pastes; the two dye pastes are disperse dye printing paste and cationic dye printing paste; (4) performing saturated steaming color fixation by using a long-ring steamer or a long-ring bottomless steamer; and (5) washing the color-fixed meta-position pure aramid fiber fabric by using a soaping machine, wherein the washing comprises cold washing, hot washing, soaping and drying. Before printing, the fabric is padded with an anti-ultraviolet finishing agent, and the color fastness to sunlight after printing is improved to a certain extent.

The application discloses a plant dye dyeing method for improving the sunlight fastness of cashmere / wool fabric, which comprises the following steps: (1) dyeing cashmere / wool fabric by using plant dyes; (2) mordanting the dyed cashmere / wool fabric in a mixed solution of ferrous sulfate and gallnut, taking out after mordanting, and washing clean; (3) soaping the mordanted cashmere / wool fabric, washing clean after soaping, and drying. After the cashmere / wool fabric is dyed by using plant extract, the dyed cashmere / wool fabric is immersed in a mixed solution of ferrous sulfate and gallnut, so that the ferrous sulfate and the gallnut form hydrogen bonds and coordination bonds with cashmere / wool fibers and plant pigments, thereby improving the sunlight fastness of the cashmere / wool fabric.

This invention discloses a school uniform fabric with moisture-wicking, quick-drying, antibacterial, and UV-protective functions, and its preparation method. The school uniform fabric is a weft-knitted plain weave fabric with a low-twist, high-proportion cotton blended yarn as the ground yarn and a high-twist, low-proportion cotton blended yarn as the face yarn. The reverse side of the low-twist, high-proportion cotton blended yarn, woven in loops, serves as a skin-friendly, moisture-wicking, antibacterial, and soft layer. The front side of the high-twist, low-proportion cotton blended yarn, woven in loops, serves as a quick-drying, UV-protective, and crisp layer. The low-twist, high-proportion cotton blended yarn is prepared by Siro compact spinning of cotton fibers, modified polyester antibacterial Supercool fibers, and modified polyester moisture-wicking, quick-drying Supercool fibers. The high-twist, low-proportion cotton blended yarn is prepared by Siro compact spinning of cotton fibers, modified polyester moisture-wicking, quick-drying Supercool fibers, and modified polyester UV-resistant Supercool fibers. The twist coefficient of the former is smaller than that of the latter, and the mass percentage content of cotton fibers in the former is greater than that in the latter.