Dyeing of polyamide
WebDec 31, 2006 · The dyeing behaviour of seven red commercial cellulosic reactive dyes, all based on the same chromophore and possessing one or more reactive group, and one to three chromophore units, were... WebMar 4, 2015 · Partially oriented yarns of polyester and polyamide of two different deniers were simultaneously drawn and dyed on the melt spinning unit using solvent crazing technique at room temperature and just above their corresponding glass transition temperature with crude disperse dyes dissolved in benzyl alcohol.
Dyeing of polyamide
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WebNov 1, 2001 · The pH control that can be achieved in a reused dyebath was investigated. The study involved a phosphate buffer system and four pH sliding systems, including ammonium sulphate and three hydrolysable organic esters. Instead of discharging the dyebath after each dyeing cycle, the residual dyebath was analysed using a UV-Vis … WebPolyamide is subjected to chemical damage at low pH so dyeing below pH 3 is not convenient. In case of drying, excessively high heat about 170℃ may impart yellowing effect on the fibers. After dyeing fibers need after …
WebDyes for Polyamide and Wool. Archroma Dorolan A dyes are suitable for exhaust dyeing and continuous applications, in combination with newly developed Fadex® PA and Fadex® W for UV-absorption and fiber protection. Together they form a highly effective solution for the coloring of polyamide and wool in automotive applications. WebJan 10, 2012 · The main properties of acid dyes are, Acid dyestuff is soluble in water. These dyes are anionic in nature. They are usually combined with basic dyes. These dyes are suitable for wool, silk, polyamide and modified acrylics. Acid dye have molecular weights in the range 300–1000 g mol-1.
WebJul 10, 2024 · Dyeing of Polyamide Fabrics. Polyamide fabrics were dyed following three different processes, namely SFD, DAFS, and DD (Figure 3A). In all cases, samples were acquired and the color coordinates are presented in Table 1. Both DAFS and DD dyeing processes at 48 h resulted in fabrics with similar ΔE 63.83 and 67.88 and K/SE and K/S … WebCotton/polyamide/lyocell fabrics are usually dyed by the two-phase technology during continuous pad dyeing with reactive dyes. Fig. 2 showed the dyeing process. In the first …
WebDyeing of protein and polyamide fibers with acid dyes is based on ionic attraction and then ionic bonding between the dye molecule and the fiber polymer. Acid dyes are anionic when dissolved in water, whereas amino groups of protein and polyamide fiber polymers are cationized in the acidic dyebath. Hence, the anionic dye is ionically attracted ...
WebExecutive. Feb 2024 - Apr 20243 months. Responsibilities: • Fabric and yarn dyeing process creation and development in Sedo central controlling system for Cotton, Polyester, Polyamide, Viscose, Rayon, Modal, Tencel and all the different types of blended knit fabrics. Responsible for overall SEDO manufacturing execution system implementation ... litcharts stampedWebApr 2, 2012 · Also, the dye, when compressed as pellets, shows practically only electron-donor character. But these values are debatable, as both acidic and basic sites are … litcharts slaughterhouse fiveWebThe dyeing is carried out as follows. The goods are entered at 45 0C into a bath containing dye, 2% acetic acid (30%) and 10% Glaubers salt, the temp. is raised to boil in 45 min. kept at boil for 30 min. the dyebath is then exhausted. If necessary by adding more acetic acid or 0.5-1% or formic acid and boiling for a further 30 min.. imperial drawing scales to metricWebCorpus ID: 100250052; KINETICS IN THE DYEING OF POLYAMIDE (NYLON) FIBRE-ANIONIC (ACID) DYE IN PRESENCE OF SURFACTANTS @inproceedings{Shah1997KINETICSIT, title={KINETICS IN THE DYEING OF POLYAMIDE (NYLON) FIBRE-ANIONIC (ACID) DYE IN PRESENCE OF SURFACTANTS}, … litcharts son of a tricksterWebContinuous level dyeing of polyamide free from frosting effect - using foaming agent mixt. of alkyl (aryl) sulphonate and hydroxyethylated fatty alcohol US4181498A (en) * 1975-09-23: 1980-01-01: Sandoz Ltd. Dyeing and printing with synthetic thickeners US4189302A (en) * 1977-09-13: 1980-02-19: World Carpets, Inc. imperial dragon symbol cuff hoodieWebJul 4, 2016 · The aim of the paper was to study the effects of mordanting methods on the absorption behaviour of cochineal natural dye on polyamide fibres.,Iron sulphate and aluminium potassium sulphate salts were used as mordanting agents, and bottom mordanting, meta-mordanting and after mordanting methods were applied in the dyeing … imperial dragon shih tzuWeb2 days ago · Due to the COVID-19 pandemic, the global Polyamide 6,6 market size is estimated to be worth USD 8450.2 million in 2024 and is forecast to a readjusted size of USD 9790.5 million by 2028 with a ... imperial dream orthocare memory mattress