Sunday, 3 May 2015

Dyeing and Printing

Dyeing and Printing

Dyeing and Printing
Dyeing and printing
Dyeing and Printing is the method by which color is applied to a textile, as well as the chemical composition of the colorant, influences the look, performance, rate of responsiveness to fashion change, quality, and cost of the product. The colorant is applied to most garments and interior fabrics at one or more stages of the manufacturing process.

The colorant is a broad term that refers to materials that are used to provide color to cloth. Colorants can be pigments or dyes. Colorants and dyeing and printing techniques are chosen by manufacturers depending on their skills, knowledge, and market needs. This information is critical because it is paired with data like fiber composition, other materials used in the product, and product assembly procedures to determine suitable care label recommendations. A plaid shirt made of colored yarns, for example, looks different, costs more, and is of worse quality than a shirt made of plaid print. The care needed for a red T-shirt colored with a reactive dye differs from that necessary for a garment done with a direct dye.

Manufacturer capabilities include equipment type and size, rules and regulations, air and water quality standards, and colorants utilized. The number of textile materials a production facility can color at one time, as well as the sort of material they deal with, are determined by the type and size of equipment. Some producers, for example, exclusively dye cotton yarn or fiber, whereas others only dye wool yarn or fiber. Some denim makers just color warp yarns. Some companies exclusively dye cloth, while others only screen print fabric. The laws and regulations governing dyeing and printing, and marketing the dyed or printed textile items differ from nation to country. The focus in various regions of the world is on water treatment and air quality. The kind of colorants used in different regions of the world may also be addressed by laws and regulations. Certain colors, for example, are prohibited in the European Union.

Dyeing and printing are critical components of the local fiber movement. Some company owners specialize in dyeing yarn, fiber, or fabric for fiber artists, hobbyists, or other small local fiber businesses. Other business owners dye or print goods such as silk scarves, cotton T-shirts, or cotton canvas bags to sell to customers through local galleries, art or fiber fairs, or internet sites. Others provide dye-to-order services to customers who require a product in a certain hue but cannot locate it on the market.

Sustainability

Textile dyeing and printing have a substantial environmental impact. The procedures used to create dyes and pigments; the usage of water and other chemicals; the discharge of dyes, pigments, and other chemicals into water systems; air pollution; worker and family health problems; and energy use are all factors. Color of the dye or pigment, salt, acids, and heavy metals are all components that contribute to water-quality issues. Some materials generate issues due to their high chemical oxygen demand (COD); others have a high biological oxygen demand (BOD). High COD and BOD materials create unfavorable habitats for aquatic plants and animals and may cause difficulties with future water use. Color in water interferes with the photosynthesis of aquatic plant life.

 

Classification of Fiber Dyes
Classification of Fiber Dyes

The durability of dyes varies greatly as well. The bulk of colors used is synthetic dyes, which are made from organic chemicals, many of which are byproducts of the petroleum industry. Natural dyes are environmentally friendly since they may be cultivated and collected regularly.

As manufacturers acknowledge the direct costs of wasteful use of materials and energy and implement closed-loop recycling of solvents, chemicals, energy, and water, manufacturers reduce sustainability challenges. Dye chemists use computers to create formulae to match designer samples and monitor dying or printing operations to ensure color consistency. Each color in a print is automatically registered by computers so that the edges match.

Stages

The stage at which color is applied has very little to do with fastness but a lot to do with dye penetration. Fabric design, quality level, and pricing all influence the dye stage. Depending on the intended color effects and the quality or ultimate usage of the fabric, color may be applied to textiles during the fiber, yarn, fabric, or product stage. Fiber-dyeing achieves better dye penetration than yarn-dyeing, yarn-dyeing achieves better dye penetration than piece-dyeing, and piece-dyeing achieves better dye penetration than product-dyeing.

 

Stages of Dyeing and Printing
Stages of Dyeing and Printing

Fiber Stage

Color is applied to fibers before yarn spinning in the fiber-dyeing process. Many fiber-dyed goods have a little erratic hue, such as a heather or tone-on-tone grey. Fiber printing does not take place since the same effect may be obtained with less effort or equipment.

Solution-dyed, producer-colored, spun-dyed, dope dyeing and mass coloring are other terms for mass pigmentation. It entails adding colored pigments or dyes to the spinning fluid before the formation of the fiber. As a result, each fiber is colored as it is spun. The color is a natural component of the fabric and is resistant to most color degradants. This approach is suitable for fibers that are difficult to dye using other processes, for specific goods, or when achieving a certain depth of the shade is challenging. Colors are often limited due to stocking constraints. Many olefins, black polyester, and acrylics for awnings and tarpaulins are examples of mass-pigmented fibers.

Stock, or fiber, dyeing is employed when mottled or heather effects, such as tweed or heather, are desired. Before spinning yarn, loose, staple fibers are dyed. It is possible to achieve good dye penetration, but it is costly.

 

Stock or fiber dyeing process
Stock or fiber dyeing process and tweed-fabric example.

Fiber-colored tops and rovings of wool, wool mixes, and other fibers, silk hankies (silk layers in square shapes from cocoons), and other combinations are available for hand spinners to utilize to produce one-of-a-kind yarns in the local fiber movement. Many of these fiber-dyed objects are dyed in three or more colors, resulting in a variety of colored yarns depending on how the spinner works with the dyed fiber.

 

Dyed Roving
Dyed roving available to the hand spinner.

Yarn Stage

Yarn dyeing can be done with yarn in skeins (skein dyeing), yarn wrapped on cones or packages (package dyeing), or yarn twisted on warp beams (beam dyeing). Yarn dyeing is less expensive than fiber dyeing but more expensive than fabric dyeing and printing. Yarn-dyed patterns are more restricted, and stockpiles are large.

 

Yarn dyeing process and fabric
Yarn dyeing process and fabric.


Yarn-dyed textiles are more expensive to make because large stocks of yarns in a range of colors are necessary, as is more time spent threading the loom or setting up the knitting machine correctly. Furthermore, every time the color pattern is altered, time is required to rethread the loom or change the knitting machine setting. Yarn-dyed textiles are considered higher-quality materials, yet solid-color yarn-dyed fabrics are uncommon. Other methods of producing solid-color textiles are substantially less expensive.

 

Hand-painted yarn
Hand-painted yarn with a fingerless glove knit from that yarn.


Although yarn printing is uncommon, it is done for specialty textiles and certain yarn used by fiber artists and hobbyists. Warp print textiles are created by weaving yarn that has been printed with a pattern before weaving. This chapter goes into further detail on warp printing later on. Some argyle hand knits are done with hand-printed or hand-painted yarn.

Piece or Fabric Stage

Piece dyeing refers to the technique of dying a bolt or roll of cloth. Piece dyeing often results in solid-color textiles. Dying fabric is often less expensive than dyeing loose fibers or threads. Color selections can be postponed with pieces dying, allowing for fast modifications to fashion trends. Solid-color piece-dyed textiles of one fiber are typical, but piece dyeing allows for the incorporation of numerous color patterns into a piece of fabric. Yarns with diverse fiber plies or textiles with yarns representing two or more fibers with distinct dye affinities or dye-resistance capabilities give intriguing possibilities. Cross dyeing is the process of combining multiple dye classes in different hues to create a wide range of color combinations and pattern alternatives. Union dyeing is the polar opposite. Even if different fibers are merged or blended in the cloth, the objective is for a solid hue.

 

Piece-dyed fabric
Piece-dyed fabric face (a) and back (b).

Cross Dyeing

Cross dyeing is the process of dyeing textiles and occasionally yarns made of fibers from different generic groups, such as protein and cellulose, or by mixing acid-dyeable and basic-dyeable fibers from the same generic group. Each fiber type or alteration has a unique dye class bond. When different colors are used for each dye class, the colored cloth seems to be yarn-dyed. The below Figure depicts a fabric consisting of wool and cotton yarns that have been dyed with a red acid dye and a blue direct dye, respectively. Some products are also cross-dyed, however for optimal results, well-prepared goods and great attention to detail are required.

 

Cross-dyed fabric
Cross-dyed fabric Blue yarns are 100% cotton, red yarns are 100% Wool

Union Dyeing

Another sort of piece dyeing of textiles manufactured with fibers from various groups is union dyeing. Union dyeing, as opposed to cross dyeing, results in a final cloth that is a solid hue. In the same dye bath, dyes that create the same hue on the fiber but are of a different kind for each fiber to be dyed are combined. Union dyeing is ubiquitous, as seen by the abundance of solid-color mix textiles on the market. The varying fastness qualities of each dye class provide an issue with these textiles. Because of the variances in colorfastness of the dyes, aged, union-dyed textiles may resemble heather.

 

Union-dyed fabric
Union-dyed fabric after several wash or dry cycles starts to take on a heather look because the two dyes do not have the same fastness.

Product Stage

Fabric can be product- or garment-dyed after it has been cut and sewed into a completed product. The product is colored when the color requirement has been decided. Gray things must be properly prepared before they can be dyed. To obtain a level, consistent color across the product, great care must be used in processing the materials and dying. Careful component selection is necessary, or the buttons, thread, and trim will be a different color due to variances in dye absorption between the various product pieces. Product dyeing is crucial in the garment and interiors sectors, where there is a focus on responding quickly to retail and customer demands.

Product printing is frequent, especially for goods for special events and sporting teams. The most common print processes are flat screen, heat transfer, and digital. Small business owners frequently screen print T-shirts, caps, bags, and other goods for customers on demand. Fiber artists and others create fiber art such as accessories and wall hangings, as well as custom printed items such as clothes and cushions.

Wednesday, 29 April 2015

, , , ,

Nanofibers

Nanofibers


Nanofibers
Nanofibers
Nanofibers are characterized as fibers with widths under 100 nanometers. In the textile industry, this definition is frequently stretched out to incorporate strands as huge as 1000 nm diameter. They can be created by melt transforming, interfacial polymerization, electrospinning, antisolvent-incited polymer precipitation and electrostatic spinning. Carbonnanofibers are graphitized filaments delivered by reactant combination.

Applications of Nanofibers:

Nanofibers have applications in medication, including simulated organ segments, tissue building, insert material, drug delivery,wound dressing, and restorative material materials. As of late, specialists have discovered that nanofiber lattices could be utilized to battle against the HIV-1 infection, and have the capacity to be utilized as a contraception. In wound recuperating nanofibers amass at the harm site and stay put, drawing the body's own particular development components to the damage site. Defensive materials incorporate sound retention materials, defensive clothings against synthetic and organic fighting specialists, and sensor applications for distinguishing concoction operators. Nanofibers have additionally been utilized as a part of colors for beatufiers.

Applications in the textile incorporate game clothing, game shoes, climbing, rainwear, outerwear pieces of clothing, child diapers. Napkins with nanofibers contain antibodies against various biohazards and chemicals that flag by evolving shading (conceivably valuable in distinguishing microorganisms in kitchens). 

Filtration framework applications incorporate HVAC framework channels, HEPA, ULPA channels, air, oil, fuel channels for auto, channels for refreshment, drug store, restorative applications, channel media for new air and fluid filtration applications, for example, vacuum cleaners. 

Vitality applications incorporate Li-particle batteries, photovoltaic cells, film power devices, and color sharpened sun powered cells. Different applications are micropower to work individual electronic gadgets through piezoelectric nanofibers woven into garments, transporter materials for different impetuses, and photocatalytic air/water sanitization.

Self-Twisting Of Nanofibers:

Self-twisting of nanofibers is identified with a harmony between adaptability, grip, and vanishing of dissolvable. Its potential applications include: substances that can change optical properties on interest, particle catch and discharge for e.g. timed medication conveyance, vitality stockpiling, and cements.

From a business viewpoint the expression "nano" describes a breadth of the stringy shape at anything underneath one micron – or 1,000 nanometers. On the other hand, the most desired properties of these materials have a tendency to show themselves at beneath 500 nanometers (.5 microns) contingent upon the material and the property. As one starts to work at the sub-atomic level there is a purported move in the representing physical science. For instance gravity gets to be extraordinarily less huge while Van der Waals strengths, which have already been considered totally immaterial by researchers, get to be unbelievably solid. The capacity to control physical science and huge properties and attributes of materials has ended up being amazingly important.

High Surface Area 
As the fiber measurement recoils into the nanoscale, the surface zone to volume proportion increments up to 1,000 times higher than a microfiber. This property for the most part has a tendency to present the mat of a huge number of fibers with improved properties more than one fiber as:

Concoction Delivery – Efficiency and time of medication or corrective conveyance to the skin

Catalysis – Efficiency of concoction or photograph catalysis of a material for a given volume

Electron & Photon Transfer – Efficiency of electron or photon exchange or prevention thereof

Slip Flow Efficiency in filtration and molecule partition through the era of slip stream at the surface of the fiber Rigidity.

Because of the extent of nanofibers, the elasticity of an individual fiber is hard to investigate; on the other hand, rigidity has been demonstrated to increment by up to 40% over the same weight of material in a mass or bigger organization.

Build the quality of a given weight of material

Utilize less materials and accomplish the same level of quality

Lessened Crack Propagation 
Accomplishing the same level of quality with less measure of material is improved by the way that the likelihood of the disappointment of one fiber is much higher than the disappointment of a large number of fibers. Moreover, upon the improvement of an auxiliary defect or split, it is difficult to spread to other discrete basic parts.

Warm Properties 
Warm conductivity testing has demonstrated that diminishing fiber measurement into the nanoscale expands warm resistance of mainstream insulative materials by very nearly 50%.

Electrical Properties
Numerous materials when prepared into nanofiber significantly enhance electron exchange. Combined with the to a great degree meager nature of a nanofiber web, these properties have considerable advantages in vitality stockpiling, photocatalytics and sensors.

Filtration 
Channels are maybe the most clear utilization of nanofibers, where channel execution is in view of delivering the most astounding stream rate while catching and holding the finest particles without hindering the channel. Nanofibers have enhanced interference and inertial impaction efficiencies and result in slip stream at the fiber surface, bringing about better execution at a given weight drop. Nanofibers are at present fused into business channels in air, fluid and car applications in both industrial and buyer showcases by a portion of the biggest filtration organizations on the planet.

Textiles 
As fiber measurements decline, wanted mechanical properties increment in respectability. In particular, quality to weight proportions are enhanced significantly, lessening the likelihood of fiber disappointment. What's more, the nano scale pores made by the sinewy cross section give the possibility to solid protection properties.

Nonwoven Consumer Products 
The capacity to load vitamins and medications in nanofibers and store them on the skin through the high surface range is being investigated for nonessential applications. Diapers, wipes and different items that will advantage from fibers that are biodegradable, biocompatible and retentive are potential recipients of nanofibers.

Vitality 
Nanofibers are being connected to photovoltaics and batteries because of expanding surface zone of certain retentive and reactant materials. Battery separators and even terminals are being created from nanofiber materials. Nanofibers produced from earthenware production and metals are being created for capacitors and photovoltaics.

Catalytics 
Clay nanofibers bearing nanoparticles of a few sorts of respectable metals are being produced for reactant applications in both car and industrial settings. The emotional increment in surface zone empowers less of the lavish metals (Platinum, Palladium, Rhodium) to be utilized while accomplishing the same levels of execution, which prompts extreme expense lessening.

Social insurance 

Social insurance applications are numerous and fluctuated, including: 

Tissue engineering: Fiber cross section is utilized to duplicate the extracellular lattice. The essential playing point of nanofibers is connected with the permeable way of their get together and expanded surface zone.

Drug conveyance: The capacity for nanofibers to be produced using biodegradable, non-biodegradable and crossover materials empowers nanofibers to be used for medication conveyance for anti-infection agents. The high surface regions empower high medication loadings and exchange to particular destinations.

Wound care: The utilization of nanofiber materials for wound consideration empowers the production of complex layered dressings that can incorporate different remedial advantages in a solitary item. Likewise, nanofiber materials offer more surface presentation of dynamic fixings, giving the chance to upgrade and expand adequacy of new or existing items.


, , , , , , , ,

Dyeing Faults

Dyeing Faults


Dyeing Faults
Dyeing Faults
Dyeing is a procedure of coloring filaments or fibers, yarns, or fabrics with either characteristic or engineered colors. Numerous known-obscure shortcomings happen amid coloring operation. 

Dyeing Faults: 
Real Dyeing Faults which happen amid are said underneath: 

1. Uneven Coloring
2. Batch to Batch Shade Variety
3. Patchy Dyeing Impact
4. Roll to Roll Variety or Meter to Meter Variety
5. Crease mark
6. Color spot
7. Wrinkle mark
8. Conditioner Imprint 

1. Uneven Coloring: 
 Causes: 
Uneven pretreatment (uneven scouring & blanching). 
Inappropriate shading dosing. 
Utilizing colors of high obsession property. 
Uneven warmth setting if there should arise an occurrence of manufactured filaments. 
Absence of control on coloring m/c.

2. Batch to Batch Shade Variety:
 Causes:
Variance of Temperature.
Improper dosing time of colors & chemicals.
Batch to Batch weight variety of colors and chemicals.
Variation of dyes lot.
Improper reel pace, pump speed, alcohol proportion.
Improper pretreatment.

Cures:
Use standard colors and chemicals.
Keep up the same alcohol proportion.
Take after the standard pretreatment methodology.
Keep up the same dyeing cycle.
Indistinguishable coloring technique ought to be taken after for the same profundity of the Shade.
Verify that the administrators include the right mass chemicals in the meantime and temperature all the while.
The pH, hardness and sodium carbonate substance of supply water ought to check every day.

3. Patchy Dyeing Impact:
 Causes:
Trap of fabric.
Flawed infusion of soluble base.
Disgraceful expansion of shading.
Because of hardness of water.
Because of disgraceful salt expansion.
Dye movement amid middle of the road coloring.
Uneven warmth in the machine, and so on.

Cures:
By guaranteeing fitting pretreatment.
Fitting dosing of colors and chemicals.
Warmth ought to be same all through the color alcohol.
Fitting salt expansion.

4. Roll to Roll Variety or Meter to Meter Variety:
 Causes:
Poor movement property of colors.
Improper colors dissolvability.
Hardness of water.
Broken m/c speed, and so on

Cures:
Use standard colors and chemicals.
Fitting m/c speed.
Utilization of delicate water.

5. Crease Imprint: 
 Causes:
Poor opening of the fabric rope
Stun cooling of engineered material
In the event that pump weight & reel pace is not equivalent
Because of high velocity m/c running

Cures:
Keeping up fitting reel sped & pump speed.
Lower rate rising and cooling the temperature
Decreasing the m/c load
Higher alcohol proportion

6. Dye Spot: 
 Causes:
Despicable Dissolving of color molecule in shower.
Despicable Dissolving of scathing pop molecule in shower.

Cures:
By fitting dissolving of colors & chemicals
By passing the broke down dyestuff through a fine stainless steel network strainer, so that the substantial un-disintegrated particles are uprooted.

7. Wrinkle Imprint:
 Causes:
Poor opening of the fabric rope
Stun cooling of engineered material
High temperature trap of the fabric

Cures:
Keeping up fitting reel sped & pump speed.
Lower rate rising and cooling the temperature
Higher alcohol proportion

8. Softener Imprint:
 Causes:
Dishonorable blending of the Conditioner.
Dishonorable running time of the fabric amid utilization of conditioner.
Trap of the fabric amid utilization of conditioner

Cures:
Keeping up fitting reel sped & pump speed.
Legitimate Blending of the conditioner before expansion.
Keep the ensnarement of the fabric amid utilization of conditioner.


, , , , , , ,

Garment Dyeing

Garment Dyeing


Garment Dyeing
Garment dyeing
Garment dyeing coloring or dyeing is the procedure of coloring completely formed garments, (for example, pants, pullovers, shirts, pants, sweaters, dresses, shower robes, easygoing coats, shirts, skirts, hosieries) ensuing to assembling, rather than the ordinary strategy for assembling Garments dyeing from predyed fabrics. Most articles of clothing are made of cotton weave products and/or cotton woven fabrics. 

Albeit a few different fabrics can be found in the entire or to a limited extent, for example, fleece, nylon, silk, acrylic, polyester and others. Because of expense funds and design patterns, Garment dyeing  has been picking up significance and ubiquity in the previous years and will keep on doing as such later on.

Garment Dyeing Machines:

Paddle machines and rotating drums are the two sorts of hardware frequently utilized for article of clothing coloring. Turning drum machines are some of the time favored for articles of clothing, which oblige gentler taking care of, for example, sweaters. A high alcohol proportion is needed for oar machines, which is less efficient and may breaking point shade reproducibility. Numerous apparatus organizations have created refined rotating coloring machines, which consolidate best in class innovation. Taking after machines are for the most part utilized for article of clothing coloring.

Paddle Dyeing Machines:

A methodology of coloring materials in a machine that tenderly move the merchandise utilizing oars like an oar wheel on a pontoon. This is a moderate procedure, yet there is greatly little scraped area on the merchandise. Flat Oar Machines (over head oar machine) comprise of a bended beck like lower suction to contain the materials and the color alcohol. The merchandise are moved by a pivoting oar, which reaches out over the width of the machine. Half inundated oars cause the material to move upwards and downwards through out the alcohol. The temperature can be brought to 98o C up in such framework. 

In parallel/ oval oar machines comprise of oval tank to improve the liquid stream and the handling the merchandise. Amidst this tank is a shut oval island. The oar moves in a horizontal course and is not half submerged in the alcohol and the temperature can be expanded up to 98o C. 

HT Oar Machines work as per the standard of level oar machine, be that as it may, the temperature can be raised up to 140o C. PES articles are ideally colored on HT paddles. In oar machines, the coloring can be completed with 30:1 to 40:1, lower proportions lessens ideal development of the merchandise, lead to unlevel coloring, wrinkle arrangement. For tenderness, the sharpened pieces of steels of the oar are either bended or have adjusted edges and the pivoting pace of the oar can be controlled from 1.5 to 40 rpm. Dissemination of the alcohol ought to be sufficiently solid to keep products from sinking to the base. Oar machines are suitable for coloring articles of all substrates in all manifestations of make ups. The products are ordinarily colored utilizing PP/PET sacks.

Rotary Drum:

These machines deal with the guideline of "development of material and a stationary liquor".The turning drum coloring machine comprises of pivoting punctured barrel shaped drum , which pivots gradually inside a vessel of somewhat greater in size. The interior drum is separated into compartments to guarantee revolution of merchandise with the drum pivot, and the external vessel holds the obliged amount of color alcohol. High temperature drum machines are equipped for preparing the articles of clothing up to 140o C.

Highlights of advanced revolving coloring gear incorporate the accompanying:

1. lower alcohol proportion
2. tender development of merchandise and alcohol (minimizes surface scraped spot)
3. quick warming and cooling
4. radiating extraction
5. variable drum speed with inversion ability (versatile to a wide assortment of products)
6. consistent flow of products (enhances relocation control)
7. simple of examining
8. variable water levels with flood washing capacities
9. extensive breadth encourage and release lines (minimizes filling and depleting time)
10. chip controls
11. build up channels
12. weight coloring
13. auto-adjusting drums

One highlight that can be utilized to diminish scraped spot on fragile pieces of clothing or to minimize tangling is a compartmental chamber, at times alluded to as a "Y" pocke .The revolving drum machines are extremely easy to work and are truly smaller in size. The expense of unit is additionally not high .

Drum coloring centrifuging machines are likewise called "multipurpose drum machines" or "multi-fast coloring centrifuging machines" subsequent to these machines can perform scouring, coloring, centrifuging and molding progressively with computerized controls. The products are dealt with in a punctured internal drum housed inside an external drum (coloring tank). Inward drums without isolating dividers are furnished with ribs that convey the products along for a certain time, mostly lifting them up out of the alcohol. These machines can work at low alcohol proportions and can color the merchandise up to 98 -140o C. This is suitable for weaves and in addition different pieces of clothing. Alcohol dissemination can be escalated utilizing extra flies. Drums can be pivoted in both the headings.

Tumbler Dyeing Machines:

These machines are being utilized for little articles of clothing either as a part of free shape or in open lattice packs. Configuration savvy the tumbler coloring machines are like the business washing machines. 

The rule of operation is to load the material into punctured inward SS tanks , which turns round an even shaft altered at the back of the drum. The drum is separated into compartments for moving the products with pivot of drum. A mixture of tumbling machines have higher pivot speeds and can turn dry toward the end of the cycle. These are like dry-cleaning machines. 

Turning drum machines are more effective and cleaner to work than oar machines. The more incredible mechanical activity frequently advances more shrinkage and building, which may be alluring for a few articles. To handle higher amounts and substantial creation of comparable pieces the most recent machines are given a few programmed highlights and modernity.

Toroid Dyeing Machine:

In these machines the pieces of clothing course in the alcohol in a toroidal way with the guide of an impeller arranged underneath the punctured bogus base of the vessel. Development of the products depends totally on the pumped activity of the alcohol. High-temperature adaptations of this machine working at 120 to 130°C were produced in the 1970s for coloring completely formed polyester or triacetate articles of clothing. The alcohol proportion of such machines is around 30:1.

Gyrobox:

The machine has bolster as a vast wheel, which is partitioned into 12 autonomous non spiral compartments. The products are set in these compartments .The wheel runs at a moderate rate of 2-6 rpm.The primary preference of this machine are, 

1.Reduced M:L 
2.Different sorts of articles of clothing can be colored simulteneously . 
3.Flexible stacking 
4.Fully programmed operation. 
6.The MCS Readymade article of clothing coloring machine 

The rotodye machines are suitable for coloring immaculate cotton,wool,polyester,cotton mixes as Shirts, sweaters, shower floor coverings and adornments , socks and leggings.

Advantages of Garment Dyeing 

Treatment of littler parts monetarily 
Empowers different enhancements to accomplished 
Bothered look can be successfully granted 
Unsold light shades can be changed over into medium and profound shades 

When the article of clothing has been in a bubbling dyebath and afterward tumble-dried, it will have embraced its least vitality state and won't endure further shrinkage under purchaser washing conditions. 

Most recent design patterns can be successfully consolidated through piece of clothing wet handling by quick input from the client. 

Disadvantages of Garment Dyeing

High cost of transforming 

A bit muddled coloring 

Article of clothing frill like zips, catches, and so forth force confinements. The articles of clothing delivered from woven fabrics make numerous issues and it has been discovered that the current material treatment styles as produced for piece colored fabric can't be simply gathered for piece of clothing wet handling operation, for example, article of clothing coloring, unless they have been built from the first plan stage for piece of clothing coloring.

, , , ,

Knit Dyeing

Knit Dyeing


Planning for Dyeing knit: 

Knit Dyeing
Dyeing knit
Creation getting ready for dyeing is called "Batch plan". As indicated by the bunch no, shading, width, style and development the group arrangement is made.

Pad Steam Range for Nonstop Dyeing of Knitted Fabrics 

Nonstop dyeing for knitted fabric was outlandish in the past on the grounds that there was no steamer accessible to handle the sensitive lattice material.

The steamer, in any case, is the most imperative module of the entire Pad Steam Range. In the steamer the dyestuff must be altered on the fiber without harming or distorting the fragile structure of the knitted fabric and without tailing or focus side variety.

Goller now has built up another ceaseless Pad Steam dyeing range for this sort of fabric. All parts are Goller made framing piece of the current secluded machine program.

The steamer as the most vital segment has been produced absolutely new with a remarkable configuration for this unique innovation.

The passage entry is adjusted for the vehicle of the impregnated knit fabric into the steamer.

The fabric is conveyed in tight strand frame on guide rollers from the padder nip to the steaming zone through the steam lock. Sensible pressure measuring burden cells ensure the very nearly tensionless vehicle. From there on the fabric is given over to enormous dimensioned transport rollers which are driven separately and similarly controlled by exceedingly delicate burden cells.

Inside the steamer the fabric is not presented to any anxiety through strain or slacks. During this phase of the procedure this is of high significance as the fabric in the steamer is wet from the dye liquor and furthermore presented to immersed steam. Through the sump warming a totally even steam air is ensured and the evenness of the dyeing result is secured.

The resulting washing procedure where color fastnesses, evenness and hand feel are at long last characterized is done on the no doubt understood Sintensa ranges. They combine tensionless fabric transport with astounding washing impact, vital for good soaping results and massiveness of the washed, flushed and killed fabric.

The Goller Pad Steam range for knitted products ensures ideal dyeing conditions during the entire entry through the range bringing about flawless measurement security of the completed fabric. The dyeing results are accordingly remarkable and the dyed fabric demonstrates the most noteworthy quality, incredible fastnesses and in addition delicate and cumbersome hand being key for an effectively offering fabric.

Most vital for the textile industry, notwithstanding, are the upsides of this new process innovation. Other than reproducibility, speedy results in view of the ceaseless methodology and great fabric execution, the natural viewpoints must be considered. The nonstop dyeing methodology of knits spares significant measures of valuable water and vitality. So it is completely in accordance with the endeavors of Goller to minimize the use of utilities for the advantage of the client and to wrap things up nature.

Knit Dyeing with Reactive Dyes:

Ingredients:

Temperature = 600-1000C
Time =60 min
Sequestering agent = 0.5 g/L
Anti creasing agent = 0.3g/L
NaCl or Glauber salt =80 g/L
Reactive Dye= x%
Caustic Soda= 1 g/l
or Soda Ash= 5g/L
Soap = 0.25 g/L
M: L = 1:10

Capacity of these Fixings: 

Sequestering specialists is utilized to change over hard water into delicate water. 

Against wrinkling operators is utilized to expel wrinkle mark from fabric. 

Gluber salt is utilized for weariness of color as a part of the fiber. 

Caustic Soda and Soda Ash are utilized for obsession of color as a part of the fiber. 

Acidic corrosive is utilized for killing the colored fabric. 

Cleanser is utilized for washing the colored fiber.

Dyeing Technique: 

At first fabric, obliged water and obliged against wrinkling specialists is included the color shower. At that point sequestering operators and gluber salt of obliged sum is included the color shower. At that point the shower is kept rest for 5 minutes. After that responsive color of obliged sum is included the color shower. In the wake of including color in the color shower, the shower is kept for 30 minutes. Amid this period fatigue of color happens in the fabric. At that point obliged measure of soluble base is included for obsession of color into the fabric. In the wake of including antacid we will sit tight for 50 minutes and afterward we will check the shade. In the event that shade is OK then fabric will be taken for after treatment.

, , , , ,

Foam Dyeing

Foam Dyeing

Foam Dyeing
Foam Dyeing
If there should be an occurrence of foam dyeing, the principle dyeing components is foam. For that is this coloring is called foam dyeing. A fabric is cushioned with a foam shaped from a fluid arrangement of a dyestuff, a foaming specialists and a transporter for the dyestuff and the cushioned fabric is kept up at raised temperatures to settle the color. The upsides of the procedure incorporate enhanced color prefixation, enhanced movement of the color into the fiber, higher shading yields in the fabric even after generally short coloring times and enhanced dimensional steadiness of the colored fabrics. 

foam is a scattering of a gas in a fluid. Here the fluid is by and large water and the gas is for the most part air yet it might likewise be an inactive gas. This is commonplace as post on brew shaving foam and so on.

Foam types:

Extensively there are two sorts of froth in particular

1. Scattering froth

2. Buildup froth

Materials Requirement for Froth Coloring:

- White fabric - cotton, rayon, silk or other characteristic fiber to color on

- Dharma Fiber Receptive MX colors

- Soda Ash Fixer

- Synthrapol

- Press containers to hold the colors

- Froth shaving cream, ideally containing aloe

- Level, shallow, plastic or metal dish

- Plastic blending dishes

- Wire whisk

-Tape

Necessities of Frothing Specialists:

It ought to produce froth promptly.

It ought to offer a decent wetting capacity.

It ought to apply quick a uniform wetting activity.

It ought to show practically zero impact on shading quickness.

It ought to be perfect with different results of the completing blend.

It ought to be minimum impact ed by water hardness.

It ought not bring about yellowing of white materials.

It ought to be effectively balanced out.

It ought to be equipped for delivering different air pocket sizes to meet particular prerequisites.

Foam Dyeing Strategy: 

1. Prewash the fabric in Synthrapol. This evacuates any oils or earth that may be on the fabric and issues you better color results.

2. Break down one glass pop fiery debris in one gallon of heated water. Absorb the fabric the pop slag answer for 5-10 minutes, wring gently and hang dry.

3. Break down your color powders (2 tsps. for hues without a *, 4 tsps. for hues with one *, 8 tsps. for hues with two *) in a little measure of warm water, blending into a smooth glue. Blend in 1/2 container tepid water. For reds and hues containing red, channel the color arrangement through an espresso channel or bit of silk to evacuate hard to disintegrate particles. Include 1/2 glass shaving cream to the sifted color arrangement, then empty this mixture into the press bottle.

4. Weaken about a large portion of a container of shaving cream with some water in an expansive blending dish. Whisk the mixture until all around mixed and thick and rich. Empty mixture into the plate until about an inch profound.

5. Squirt the color/shaving cream mixture over the shaving cream/water mixture in the plate in any example you wish. Utilize a brush, chopsticks, or any instrument to twirl and spread the color into any example sought.

6. Place a bit of the readied fabric on the surface of the shaving cream and color example. Evacuate any air rises by pushing down tenderly with an apparatus or a gloved hand.

7. Permit the fabric to sit on the surface of the color/shaving cream for 5 minutes, then evacuate fabric by lifting painstakingly. Place on a level surface shaving cream side up and permit to sit for 2 to 24 hours to build up the color. The piece needs to stay clammy for the actuation to occur.

8. Wash fabric in cool running water to evacuate the pop cinder, and afterward build temperature to hot. Keep on flushing until water is clear, then wash in high temp water and Synthrapol to evacuate any abundance color. Dry, press and voila!
, , , , , ,

Solvent Dyeing

Solvent Dyeing

Solvent Dyeing
Solvent Dyeing
Solvent dyeing is a dyeing procedure completed from a persistent non-acqueous stage. Here Solvent is utilized as dyeing media. In any case, water may be added to support coloring methodology. Since the presentation of hydrophobic filaments like cellulose acetic acid derivation in 1920's Solvent have been considered for coloring in light of the fact that it was impractical to color such strands with ionic colors and water. 
The particles of solvent dyes are non-polar (or have a little measure of extremity). This implies that the diminishing methodology does not occur through ionization (similar to the case with different sorts of colorants like acid dyes). Consequently, solvent dyes are regularly insoluble in water.

Solvent dyes are genuinely flexible and utilized as a part of different applications. One kind of non-polar, natural solvent that is usually utilized with solvent dyes is petrol. Accordingly, solvent dyes are frequently utilized as a part of the auto industry to color petrol fuel and other hydrocarbon based fuel oils. They are likewise usually used to color candles and waxes, ink and inkjets, wood stains and coatings, and an assortment of other non-polar, hydrocarbon based materials. In view of their synthetic similarity, solvent dyes have gotten to be broadly utilized for dyeing plastics. The coloring of PVC is currently done completely with the utilization of solvent dyes.

The naming of solvent dyes has been institutionalized, after the example of the color of the dye (and a recognizing number) nearing after "solvent" for instance, numerous shades of red solvent dyes are separated by the number toward the end of the name (i.e. "Solvent Red 1," Solvent Red 49," Solvent Red 24," Solvent Red 111," etcetera).

Solvent dyes are only one sort of colorant that Pylam offers. Whatever your item may be, we are sure to have the fitting dye or color. The majority of our colorants, including our solvent dyes, are of the most astounding quality. We direct exhaustive testing to guarantee that the colorants we pick coordinate the concoction creation of your item. Contact us today and let us help you locate the ideal color for your item.

Qualities of Solvents: 

A perfect solvent for Textile transforming ought to have the accompanying attributes – 

1. Non- lethal. 

2. Non-combustible. 

3. Non-destructive. 

4. Latent to material materials. 

5. Stable to rehashed refining. 

6. Low Specific warmth. 

7. Low warmth of vanishing. 

8. Promptly accessible. 

9. Monetary attainabilit

The types of Solvent Used in Textile Processing: 

A few solvents of chlorinated hydrocarbons of aliphatic arrangement forces a large portion of the said prerequisites and consequently are being utilized as solvents are widely utilized, for example, –

1. Tri-chloro Ethylen (TCE).

2. Every chloro Ethylen (PCE).

3. Methyl Chloroform (MC).

Each of the three solvents are similarly suitable yet tri-chloroethylene has high strength to decay and thus isomers ideal.

Favorable circumstances of Solvent Dyeing:

1. High wettability and dyeability.

2. Fast coloring with least vitality necessities.

3. Better levelness and color yield contrasted and better fabric feel.

4. Solvent Dyeing is being reused, so the gushing control issue is wiped out.

5.Less time needed.

Impediments of Solvent Dyeing:

1. Solvents are lavish, so higher generation cost.

2. Issue in supplies accessibility.

3. Existing color can not be utilized as a part of full rang.
, , , ,

Blend Dyeing

Blend Dyeing

Blend Dyeing
Blend Dyeing
In this system the PC or CVC products can be colored at one single shower with scatter and chose direct colors (stable in high temperature and perfect with polyester coloring)- scatter for polyester and direct for cotton. Some immediate colors , for instance , C.I. Direct Black 22 – the pH may be changed in accordance with 8-9 with pop fiery remains.

Fibers may be combined to create a fabric with enhanced properties or to blend a less lavish fiber with a more costly one to acquire a bargain in the middle of value and execution. At the point when more than two or more distinctive fibers are blended personally in a yarn and that yarn is utilized to make a fabric, the subsequent blends is alluded to as a blend. At the point when yarns produced using one fiber are woven with yams produced using another fiber, the fiber sorts are not personally blended and the fabric is alluded to as a union. At the point when fabrics are produced using blends of fibers, four distinct sorts of dyeing impacts may be accomplished.

1. Strong dyeing - both fibers are dyed the same shade and to the same profundity.

2. Reservation - one fiber stays undyed

3. Tone-on-tone - one fiber is dyed a more profound shade than the other.

4. Cross dyeing - every fiber is dyed an alternate and differentiating tint.

Blends of polyester and cotton fibers have gotten to be vital to the textile industry. Cotton gives the stylish and solace properties requested by buyers, while the polyester part adds to execution properties. Luckily, as a result of the amazing contrasts in the dyeing conduct of the two fibers, dyeing blends of these two fibers is genuinely clear. Every fiber may be dyed the same color, or they may be dyed diverse shades. Polyester has no fondness for the vast majority of the classes of dyes used to color cotton, the cellulose being just recolored by scatter dyes. The "Thermosol" process for dyeing polyester was produced by the DuPont organization for the nonstop dyeing of polyester fabrics. This single advancement permitted the quick development of polyester fabrics in the right on time to mid-fifties. The procedure includes padding on the scatter dye together with helpers that minimize movement, drying, then settling the dye in the polyester by dry warming to a high temperatures around 190° – 205°C. During this process the fiber sub-atomic ties open up at these lifted temperatures and the

scattered dyes vaporize and diffuse into the polymer. On cooling, the dyes are caught inside the fiber yielding colored fibers that have great quickness properties. Fitting readiness of the fabric is critical in a constant dyeing operation. For cotton/polyester, the fabric must be totally clean, since leftover oils or earth will be set into the fabric during the Thermosol treatment. The fabric must additionally wet out immediately and consistently to safeguard sufficient ingestion during the padding operation. Favorable circumstances for Thermosol dyeing over customary watery group dyeing systems are: 1. Being nonstop, huge parts can be dyed monetarily. 2. Since no transporter is included, buildups, and speed issues are lessened. 3. Dye obsession is fantastic. 4. Rope imprints are disposed of on the grounds that the fabric is handled in open width. 5. Warmth setting and dyeing may be completed all the while. 6. Dyeability is not influenced by earlier warmth setting. The real inconvenience of this strategy is that long runs of a given shade are important to amplify the full monetary advantage. Some broad data about the procedure may be useful. The dye suspension ought to be homogenized to make it stable. A thickener, generally, sodium alginate at 0.15-0.3 gm/l, is to enhance wet get and to minimize relocation during drying, along these lines disposing of side to side and two sided dyeings (i.e. at the point when the back of the fabric is an alternate profundity contrasted with the face) and radiance impacts around neps and slubs. An anionic wetting operators, e.g., sodium sulphosuccinate at 0.2 gm/l. is added to guarantee quick and complete wetting of the fabric surface. In the wake of padding, predrying and drying, thermofixation is effected at 190° - 205°C for 60-90 seconds to advance complete obsession, penetration, and warmth setting. The cotton dye may be connected from the same shower as the scatter dye. Vat dyes, Sulfur dyes or a Reactive dye can be utilized relying upon the tone and speed needed. In this investigation, a receptive dye will be connected to the cotton fibers in the union fabric, while a scatter dye will color the polyester fibers. Fiber responsive dyes display magnificent wash speed in light of the fact that they are covalently clung to the cotton fiber. This class of dyes was created during the 1950's and keeps on being utilized where incredible wash quickness is needed.

The covalent linkage in the middle of cellulose and a receptive dye may be created by either an acidic or fundamental response, contingent upon the way of the responsive gathering. Most oblige the vicinity of alkali and some warmth to frame the bond to cellulose. Obsession techniques include: • Steaming • Dry warmth (heating) • Air hanging • Wet improvement • Pad(alkali)-clump process If receptive dyes are to be altered by dry warmth, as in the Thermosol process, 50 - 200 g/l urea ought to be added to the pad-shower. "Wet advancement" is infrequently utilized when responsive dyes are utilized as a part of combination with azoic dyes. The pad shower or print glue is arranged with no alkali. In the wake of drying, the fabric is gone into a hot, alkaline arrangement (to settle the responsive dye on the cellulose) containing salt to minimize dying, then washed completely, and dried. The pad-cluster procedure is of worth where no steaming or preparing facilities are accessible. The fabric is padded with dye and alkali, bunched on a roller, wrapped in polyethylene to prevent drying, put away overnight while being pivoted to prevent uneven dyeing, and after that washed and washed. Vast quantities of polyester/cotton blends are dyed in open width by nonstop thermofixation strategies. One arrangement for this methodology is:
1. Pad with dye and "movement inhibitor".
2. Dry.
3. Thermofix.
4. Wash and lessening clear if fundamental.

In the wake of padding and drying, around 30% of the scatter dye holds fast to the surface of polyester and the staying 70% to cotton. During thermofixation, the scatter dye vaporizes and exchanges to the swollen polyester fibers. For most extreme colorfastness, it is attractive to give the dyed fabric either a hot soaping or a warm "diminishment clear" with sodium hydrosulphite and acidic soda to evacuate inexactly held surface dye. On the off chance that this combination of dyes (scatter and responsive) were to be connected by a bunch prepare in a dance or a jet, two stages would be needed. The scatter dye would be connected first at high temperature 130°C with a scattering operators, on the grounds that the receptive cotton dye won't withstand the decrease pass this procedure is completed before the cotton dyeing to evacuate surface scatter dye. After the polyester has been dyed with the scatter dye, the receptive dye would be connected to the cotton fibers and settled, as a rule by the expansion of alkali.
The fabric utilized as a part of this analysis is a blended 50/50 polyester cotton fabric in both weft and warp.

Average Formula for dyeing of Polyester/Cotton blends:

Dispersing agent= 0.5 – 1.0 g/l
Sequestering agent= 1.0 – 2.0 g/l
Levelling agent= 1.0-2.0 g/l
Carrier= 1.0-3.0
Disperse dyes= X%
Selected direct dyes=Y%
Acetic acid (50%)= 0.5-2 g/l
Glauber salt= 5.0 – 20.0 g/l
Temperature= 90- 100
Time = 60- 120 mins
M:L= 1:10

Dyeiing Procedure:

1. Ser the dyebath with substrate at 50 temperature and include scat
tering specialists, leveler, acidic corrosive , bearer and different helpers , then urn the dyebath for 5-10 minutes.

2. Include both colors and raise the temperature to 90- 100 @ 1-2 C/min

3. Include glauber salt and run the shower for one to two bours at the same temperature .

4. Drop down the shower temperature to 70 – 80 more than 10-15 minutes.

5. Dribble the dyebath and bear on the aftertreatment process.

Kicking the bucket of Polyester/Cotton Blends Products:

After Treatment Process:

1. Flush twice with hot and frosty water.

2. Treat the fabric with suitable settling operators for enhancing the wet quickness properties of colored merchandise .

3. Cleanser wash as indicated by merchant proposal.

4. Flush twice with hot and frosty water and after that

5. Neutralize it with acetic acid.