Continuous dyeing is employed for vat, reactive, disperse, sulfur, acid, pigment direct etc. Winch dyeing machines working process of winch dyeing. Pad batch or cpb process, paddry thermofixing process, econtrol process. After the dyeing operation is conwlete, dry dye powder, which has not been used up. In continuous dyeing of cotton with reactive dyes, steaming and. This chapter introduces the general technology for the dyeing of textile materials yarn and selection from process control in textile manufacturing book. However for light and medium shades or when fiber brightness is important, bleaching becomes an essential operation before dyeing or printing. Pdf indigo ring dyeing of cotton warp yarns for denim fabric. Pdf dyeing of polyester and polyamide at low temperature. Therefore it was not a coincidence that in 1978, swastik was the first indian manufacturer to launch the open width pretreatment range with. Dyeing can be carried out as a continuous or batch process. They obviate the need for reduction clearing and are used in both exhaust and continuous dyeing. The fabric is wound on rollers in a pad dyeing machine in an openwidth form.
Jun 08, 2019 this technique involves dyeing at the fabric stage. Mostly continuous dye ranges are designed for dyeing. The carpet is placed on guide rolls so that the surface of the carpet always faces outward. Continuous openwidth bleaching ranges, pretreatment. Mar 19, 2012 a continuous dyeing process typically consists the following. Feb 21, 2019 dyeing can be performed using continuous or batch processes. With regard to manmade fibers, which are generally white. Dyeing process for different textile materials could be different but its basic idea is same for all. Jul 14, 2012 through scenario analysis, we note that motorized shipment should be used instead of shipment by trucks, when conditions permit.
Read article about read article on methods of dyeing, process of dyeing, the chemistry of the dyeing process, dyeing machinery and equipment, bale dyeing, batik dyeing, beam dyeing. With continuous bleaching, the fabric is saturated with the bleaching bath. This two bath process is continuously carried out in continuous dyeing process 2. Continuous dyeing process is a very efficient process as compared to batch dyeing resulting in low costs and higher production. Methods and machinery for the dyeing process sciencedirect. Difference between continuous and batch process continuous. The winch dyeing machine is suitable for practically all types of fabrics, which can withstand creasing in rope form processing. Technical information successful dyeing of polyester. Apr 24, 2014 continuous dyeing process continuous dyeing has been found to be most suitable for woven fabrics. Dyeing can be performed using continuous or batch processes. Development of rapid continuous dyeing process for heavy.
Used for difficulttodye, manufactured fibers such as olefin, and for end uses requiring excellent colorfastness. Continuous dyeing processes typically consist of dye application, dye fixation with chemicals or heat, and washing. Traditionally, four dyeing processes have been employed to dye cotton and. Permanent press treatments, water proofing, softening, antistatic protection, soil resistance, stain release and microbialfungal protection are all examples of fabric treatments applied in the finishing process. Dyeing is the process which places the dyes inside the fibers. A dyeing process is the interaction between a dye and a fibre, as well as the movement of dye into the internal part of the fibre. It becomes an integral part of the fibre due to the formation of a covalent bond between the reactive group of this dye and the fibre polymer. Thermasol method is continuous methods of dyeing with disperse dye.
New developments in dyeing process control semantic scholar. The construction and the operation of a continuous plant handling 12. Dye application, dye fixation with heat or chemicals and finally washing. Bombay 400 019, india present textile market is buyers market. The tension exerted on winch is less than jigger dyeing machine,the material thus dyed is with fuller hand. Process for the continuous dyeing of industrial nylon. New developments in dyeing process control m dteli department of chemical techn9logy, university of bombay, matunga. Continuous dyeing has been found to be most suitable for woven fabrics. Blends dyeing is a big challenge due to the differences in. However, on current dye pad or slot applynip steamwash continuous dye lines, the slow speeds necessary to adequately process heavy weight carpets.
One of the limitations of dystars ttn onepass continuous dyeing process for dyeing polyesterunmercerised cotton blends with disperse and reactive dyes is its inability to achieve heavy depths economically and part 1 of this study indicated that. Continuous dyeing of cottonpolyester and polyester. The uniform dye bath distribution over the length and the width of the fabric is essential for a perfect dyeing result on continuous dyeing process paddry. Pretreatment of textiles prior to dyeing 225 substrate. A versatile pad batch dyeing system equipped with dosing pump, necessary storage tanks etc. Dyeing of polyester and polyamide at low temperature using solvent crazing technique article pdf available in fibers and polymers vol. Pad steam is an ideal machine for reactive dyeing of cotton and its blended fabrics.
Technical information successful dyeing of polyesterelastane. Companies operating in this sector are facing significant challenges, many associated with the acquisition and disposal of these essential raw materials. Dye fixation on the fiber occurs much more rapidly in continuous dying than in batch dyeing. Smith and milton harris 1 abstract the dye combining capacity of untreated wool has been determined for the typical acid dye, orange ii, and shown to be equal to the acidcombining capacity. Shade matching in continuous dyeing is a challenge quite different in scale from that of automated batchwise dyeing, where a mismatched dyelot can often be given a minor correction without removing the dyed batch from the dyeing vessel. The influence of woven fabric structures on the continuous. To promote energy conservation and the clean production of continuous pad dyeing technology for cotton fabrics, other environmental impact categories besides the impact of the water system should be given focus. A continuous dyeing process typically consists of dye application, dye fixation with heat or chemicals and finally washing. There are total 5 baths that are used before the actual dyeing. These as well as other factors will be discussed in this document. Continuous pad dyeing, pad steam dyeing, maxi jig electronic.
Continuous dyeing of cottonpolyester and 100% polyester fabrics was performed using mixtures of reactive and disperse dyes, or disperse dyes alone, respectively, and achieving dye fixation by heating, using an electric infrared oven situated in front of an electric hot air unit. Smith and milton harris 1 abstract the dyecombining capacity of untreated wool has been determined for the typical acid dye, orange ii, and shown to be equal to the acidcombining capacity. Unlike the earlier sections, it is subdivided according to the major fibre types. Here time of dyeing should be maintained very carefully to get required shade and to retain required fabric strength. May, 2014 shade matching in continuous dyeing is a challenge quite different in scale from that of automated batchwise dyeing, where a mismatched dyelot can often be given a minor correction without removing the dyed batch from the dyeing vessel. Generally, a dyeing process involves adsorption transfer of dyes from the aqueous solution onto the fibre surface and diffusion dyes diffused into the fibre. Reactive dyes are dyes used for dyeing protein, cellulose and polyamide fibre and they are anionic. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Dyeing of polyester fabric with disperse dyes textile. It is used for dyeing large quantities of yarns for denim with indigo andor sulfur dyes. An improved continuous dyeing process for coloration of heavyweight 6070 ozyd2, residential nylon 6,6 carpet is reported. Treatments with nitrous acid, hydrogen peroxide, sodium hypochlorite, and strong.
The first of these requires the smallest machine range, whilst the other two demand more complex ranges. The fabric in its long length is then made to pass through a trough which contains the dye liquor, and moved along the roller. The hall includes a full thermex continuous dyeing range suitable for the econtrol process. Us4832699a us074,071 us407187a us4832699a us 4832699 a us4832699 a us 4832699a us 407187 a us407187 a us 407187a us 4832699 a us4832699 a us 4832699a authority us united states prior art keywords nylon fabric process dye filament prior art date 19870715 legal status the legal status is an assumption and is not a legal conclusion.
The textile substrates are feeded continuously into a dye range. One radically new approach is to use supercritical co2 medium for dyeing pet with disperse dyes9. The winch dyeing machines are suitable for types of wet processing operations from desizing to softening. By inserting a slot steam applicator after the dye pad and before the box steamer to preheat the carpet to around 180f greater than thenylon wet glass transition temperature of 150f, the required dwell time of. Substances which cause these changes are called dyestuffs. Continuous dyeing process continuous dyeing has been found to be most suitable for woven fabrics. Us4832699a continuous process for dyeing nylon fabrics. Dyeing polyesterelastane at c permanent drawing of elastane fibre loss of stretch recovery power elastane fibres have higher affinity for disperse dyes than do polyester fibres heavy staining of elastane fibres poor colour fastness of dyed polyesterelastane fabrics careful choice of preparation chemicals dyes dyeing process. In this article i will discuss different continuous dyeing techniques. The essential objective of this process is to produce a substrate that has the following properties.
In continuous dyeing fabrics are bleached, mercerised, dyed and washed in open width form on ranges, which are long. The exhaust dyeing process can take anywhere from a few minutes to a few hours. Continuous dyeing ranges tend to have several sections that use very large amounts of energy. Mostly continuous dye ranges are designed for dyeing blends of polyester and cotton. Lifecycle assessment of continuous paddyeing technology for. Pdf normally dyeing of polyestercotton blended fabric is dyed in two steps. Expired lifetime application number us599325a inventor henry r mautner current assignee the listed assignees may be.
Different continuous methods of dyeing textile course. In batch dyeing, a certain amount of textile substrate, usually 100 to 1,000 kilograms, is loaded into a dyeing machine and brought to equilibrium, or near equilibrium, with a solution containing the dye. Shang, the hong kong polytechnic university, china abstract. Continuous bleaching process with cbr bleaching machine. Their benefits include a high fixation rate, high reproducibility, fewer water effluent treatment problems and good fastness performance. However, dyeing of garment, terrytowel, microfibre and hosiery or knit goods also account for a sizable production and some deve lopments in this respect need to be also summarized. The process of this invention, which may be conducted on a continuous dyeing range, employs a dye assistant system to effectively and uniformly dye filament nylon fabrics and lowdenier, hightenacity continuous filament fabrics. Dye fixation is a measure of the amount of the percentage of dye in a bath that will fix to the fibers of the textile material. Dye stuff and obas, in textile processing plants the model is designed and developed so as to prepare the recipe for the cdr machine and also to test the fabric, dyes. Pdf onepass process for the continuous dyeing of polyester. The textile dyeing and finishing sector uses large volumes of water and substantial quantities of complex chemicals.
Padsteam dyeing machineprocess padsteam dyeing is a process of continuous dyeing in which the fabric in open width is padded with dyestuff and is then steamed. Continuous dyeing in continuous dyeing fabrics are bleached, mercerised, dyed and washed in open width form. Described is a process for continuously dyeing high tenacity nylon 6,6 fabrics including the sequential steps of applying to a high tenacity, highly crystalline nylon 6,6 fabric whose fibers have a breaking tenacity in the range of 6. A study project on lab to bulk shade variation in cold padbatch dyeing process by jaywant bari chemical processing of textiles. The temperature of treatment for this chemical is close to boil. If a continuous dyeing arrives at the delivery end of the range slightly offshade, some form of. Cold pad batch dyeing economy and ecology there are presently three main processes in use world wide for continuous dyeing of woven and knitted cellulosic fabrics.
Thermasol dyeing method of polyester fabric dyeing of. These are likely to be along the same lines as econtrol described earlier under continuous dyeing. Pdf single and double bath dyeing of polyestercotton. If this temperature can be reduced, there will be considerable amount of time and energy saving x no. Filament nylon 6 and 66 fabrics are dyed in a multistep continuous aqueous dyeing process. A continuous dyeing process typically consists the following. When the fabric has absorbed, or fixed, as much dye as it can, the bath is emptied and the fabric is rinsed to remove any excess dyestuff. Pdf effect of continuous dyeing fixation methods on light fastness. Dyes can be used on vegetable, animal or man made fibers only if they have affinity to them.
Dyeing can be carried out as a continuous or batch process 37. The purpose of this work is to investigate the influences of weave structure on dyeing of standard tencel fabric using reactive dyes applied by continuous dyeing methods. Dyes are the chemicals that are absorbed into the molecular structure of textile fibers which produce the color of the molecular structure of textile fibers which produce the color of the textile product. Palanil e dyes pale to medium shades dispersol cvs dyes medium to heavy shades 1. In a continuous process, the influence of the substantive effect of the dyestuffs is reduced so much that good toneintone dyeing effects can be achieved with blends with cotton. Process sequence, continuous dyeing range machine cdr.
A continuous dyeing process is used in dyeing of carpets. Disperse dyes are added to water with a surface active agent to form an aqueous dispersion. The dyeing of hydrophobic fibres like polyester fibres with disperse dyes may be considered as a process of dye transfer from liquid solvent water to a solid organic solvent fibre. Jet dyeing can be applied to both woven and knitted fabrics and the bleaching, dyeing and washoff is normally carried out in the same machine using a single, sequential combined processes. It is a continuous process and the excess dye is squeezed out of the fabric. Bleaching is a process by which the natural coloring matter and any other colouring matter is removed from natural fibers which are responsible for diminishing the fabric whiteness. Continuous dyeing and cold pad batch dyeing novacron c are bireactive dyes that can form covalent bonds with cellulosic fibers in alkaline conditions.
Continuous dyeing article about continuous dyeing by the. Dyeing of polyester fabric with disperse dyes textile learner. Some of the process sequence with dyeing shade discussion for continuous dyeing range machine cdr cdr machine is excellent machine for bulk order. The third section is concerned mainly with developments in dyes, auxiliaries and process sequences in continuous dyeing. In a continuous dyeing process, long rolls of fabrics are heated and steamed as they pass through a machine that sprays or applies concentrated chemical solutions with dyes in them. The continuous dyeing of secondary cellulose acetate. The consumer dictates the term as far as the quality, quantity and. Batch process refers to a process that involves a sequence of steps followed in a specific order. Yarn dyeing is used to create interesting checks, stripes, and plaids with differentcolored yarns in the weaving process. As a general rule preparation processes, as discussed earlier, can be thought of as cleaning the textile substrate prior to dyeing, printing andor finishing. Indigo ring dyeing of cotton warp yarns for denim fabric. The process is suitable, without modification, for dyeing blends of these fibres with viscose rayon and cotton, making use of reactive dyes for the cellulosic component.
Continuous process refers to the flow of a single unit of product between every step of the process without any break in time, substance or extend. Uniformly dyed fabrics having a high degree of fiber bundle penetration result. Semi continuous dyeing process free download as pdf file. The more promising recent development of the combined dyeing and mercerizing of cotton in liquid ammonia is given attention.
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