Auxiliaries & chemicals required in dyeing and finishing

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Auxiliaries & Chemicals Required in

Dyeing and Finishing

Name : MAZADUL HASAN SHESHIRID: 2010000400008Batch: 13th Batch (Session 2009-2013)Department: Wet Processing Technology Email: [email protected]: www. Textilelab.blogspot.com Southeast UniversityDepartment of Textile Engineering

PREPARED BY ©right

School of Science and Engineering, Department of Textile Engineering

Southeast University

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Introduction:Most of the operations in the textile processing such as scouring, bleaching, dyeing and printing are carried out by use of basic chemicals like acid, alkalis oxidizing, reducing agents dyestuffs etc.Besides this other chemical are also used in relatively small quantity proportion to increase the efficiency of above process. These substances are called Textile Auxiliaries.



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What Does Auxiliary Mean in Textiles?

It is defined as a chemical or a formulated chemical product which enables a processing operation. The various processing operations may be in the functions of preparation, dyeing, printing or finishing. Auxiliaries help by speeding up these processes or carry out the processes in a more efficient manner. This is necessary to obtain the desired effect.



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Carrier or Swelling agent,Levelling agent, Antifoaming agents, Dispersing agents, Detergents and Wetting agents etc.

Same example of auxilaries



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Objectives:

To know about the different types of Auxiliaries and their function.

To know the dyeing and finishing auxiliaries.



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Primary functions of auxiliaries

To prepare or improve the substrate for coloration

To modify the sorption characteristics of colorants

To stabilize the application medium

To protect or modify the substrate

To improve the fastness of dyeing

To enhance the properties of laundering formulations (fluorescent brightening agents).



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Soda ash Hydrogen Peroxide

Some Auxiliaries



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Caustic Soda ( Flakes)

Some Auxiliaries

Acetic Acid



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Hydrochloric Acid

Some Auxiliaries



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Classification of Dyeing Auxiliaries

Sequestrant..

pH Control and buffer system

Lubricants /

Anticreasant.

.Acetic acid

Desizing Agent

Wetting Agents

Dye fixing agent

Softener

Levelling Agent.

Mercerising agent

Antifoaming agent.

Enzyme

Bleaching agent

Soaping Agent

Optical

Brightener.

Peroxide Killer.



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Auxiliaries and its function

Used to remove hardness and metal ion present in dyeing liquor. Hardness of dyeing liquor can occurred due to hardness of fabric after pretreatment which is 35 ppm and also from salt which is 70 ppm

Sequestering Agent

POLIAC 194 FE, POLIAC 195, POLIAC BIO

Example of Sequestering agent



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Desizing Agent

Desizing is the process of removing the size material from the warp yarn in woven fabrics.

Example of Desizing Agent

DISAPPRETTANTE SG, DISAPPRETTANTE HT etc.



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Bleaching agent

Hydrogen peroxide is used for bleaching of cotton fabric and remove natural color.Bleaching removes contamination from finished cotton. Full range of bleaching agents like peroxide bleaching agent.

H2O2

Bleaching agent



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Peroxide Killer.

Peroxide Killer.

It is used in the removal of residual hydrogen peroxide used in bleaching of textiles before dyeing.

SYNTHOKILL-P

Example of PK

Basopal FB PK, SYNTHOKILL-P



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pH Control and buffer system

Many disperse dyes required controlled 4.5-5 and practically all disperse dyes give good results in this pH range and are much more sensitive to minor changes in pH.

A buffered system is necessary for precise control of pH.

PH Regulato

rs Eulysin PC



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Levelling Agent.

Trade Name Form lonic* Application

ABLUTEX RL Liquid A

Levelling agent of direct and reactive dyes, clear and deep color.

Levelling Agent use for cotton fabric



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Levelling Agent.


ABLUTEX RT430

Liquid A/N Dispersing and levelling agent for high-temperature jet dyeing

Levelling Agent use for polyester fabric.



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Levelling Agent

Levelling Agent use for Nylon


ABLUTEX LN Liquid N Levelling agent for dyeing nylon fibers with acid dyes.



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Wetting Agent

To reduce surface tension of water thus ensures easy penetrating of chemicals and dye to the fabric.

BIPON BOD anionic Yellowish liquid Wetting / Detergent is used for preparation of cotton and blends. BIODEGRADABLE

Wetting Agent



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Mercerising agent

Mercerizing is a process used to increase the luster of cotton. Mercerizing is a process used to increase the luster of cotton.

Mercerizing is a process used to increase the luster of cotton. Mercerized cotton is often used in cotton crafts and yarns.

NaOHExample of mercerising

agent



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Soaping Agent

Functions of soaping agent

Disperse the unfixed substanted hydrolyzed dyes, and solubilise and mulsify these into the aqueous medium and keep these substances in suspension.

Prevent redeposition of hydrolyzed dyes and other particles of colloidal substance into the textile material

Prevent the precipitation of insoluble calcium or magnesium salt



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ABLUTEX TS330 Liquid A

Soaping agent for dyed or printed with reactive dyes. Effective in Preventing white ground from being stained.

Example of Soaping agent



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Optical Brightener

An Optical Brightening Agent (OBA), also called Fluorescent Brightening Agent (FBA) or Fluorescent whiteners (FW), are strongly fluorescent substance that emits light in the blue-violet region of the visible spectrum.

Example of OBA

Ultraphor FB CA, Ultraphor FB IN



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NAME OF CHEMICALS FUNCTIONFelosen Jet Wetting agentSirrix 2UD Sequestering agent, Maintain pHUNJ Antifoaming agentLadiquest Wetting agent, Detergent, Levelling agent

Stabilol P Stabilizer (Organic)Cibacell DBC Levelling agent (Dye bath)Tubinagol Finishing agentThinofix Finishing agent (cationic)Belfosin GT Finishing agent

FUNCTION OF DIFFERENT CHEMICALS WHICH IS USED IN SINHA DYEING & FINISHING



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Printing

The textile printing is the art of design by mechanical and chemical application

Printing Chemicals



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Synthetic Thickening Agents for Pigment Printing

Lutexal GP ECO

High polymer, Acrylic Synthetic thicknerVery high electrolyte stable, sharp defined prints, suitable for photographic prints and multicolour design. More environment-friendly because of low hydrocarbon emission.



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Synthetic Thickening Agents for Reactive Printing

Lutexal F-RP Acrylic co polymerSynthetic thickener, substitute for sodium alginate imparts higher colour yield andsharp defined prints. Used for printing cotton and viscose with reactive dyes. .



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Binders for Pigment Printing

Helizarin Binder TOW

Thermally crosslink able aqueous acrylate dispersion (APEO free)Binder for pigment prints that are fast to dry-cleaning having extremely soft handle excellent all round fastness and very high rubbing fastness. Used in Soft Print recipe.



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Acrylic productBinder for khadi printing having good running properties & better fastness. Gives very good coverage to khadi prints.

Binders for Khadi Printing

Helizarin Binder FB KH



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Crosslin king Agents and Fixers

Cross linking agent for improving the wash and rub fastness of pigment prints on synthetic fibers and regenerated cellulose, and on their blends with cotton. For prints with a low formaldehyde content. Suitable for oeko-tex requirements.

Helizarin Fixing Agent LF



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Fixers for Disperse Printing

Luprintan FB FA

Mixture of ethoxylatesFixation auxiliary for the high temperature-steam fixation of disperse dyes in direct printing of polyester materials.



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Antifoam for Pigment Printing

Entschaumer- TC ECO Eco Blend of synthetic copolymers and

emulsifiers (APEO free)Solvent free and Antifoaming Agent for Textile Printing.



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Softeners

Luprimol SIG Concentrated silicon based auxiliarySoftener, improves fastness giving high quality pigment prints having soft handle & high dry rubbing fastness. Improves colour brilliancy.

Bilsoft FB-S Softener that gives an extremely soft feel to pigment prints.



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White Pastes for Pigment Printing

Helizarin White, Paste FB T

Titanium dioxide in an aqueous acrylic binder systemReady to use white paste having good covering properties. Used for printing on dark grounds. Suitable for mainly woven fabric.



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Process Flow Chart for Knit Dyeing: For Pink color

Fabric : Single Jersey Quantity : 1310 kg GSM : 180 M: L=1:7 (During Pretreatment)

8. (During Dyeing)Color : Pink Water - 9200 lit (Pretreatment)

10500 lit (During Dyeing)



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No. Commercial name of Dyes & Chemicals Amount(g/l or %)

Total amount

Pretreatment:1. Wetting Agent-Proder_SCPC/LD/NO-LF 0.5 4.48 kg2. Gintex ECO GS CONE (S.A) 0.1 896gm3 Peroxide Stabilizer SR/Stabilizer A/Stopa-52 0.4 3.584kg4 Anticrease-AULIT-PAC(8460) 0.8 7.360 kg5 Caustic soda 3.0 27.6 kg6 H2O2 2.75 25.3 kg7 Peroxide Killer Geizyme OEM/Cetatex PC 0.5 4.6 kg8 Acetic Acid 1.0 9.2 kg

Dye Bath Chemical:9 Acetic Acid 0.2 2.1 kg10 Gintex ECO GS CONE (S.A) 0.2 2.1 kg11 Anticrease-AULIT-PAC(8460) 0.8 8.4 kg12 Leveling Drimegen E2R/Secho IND/Jinleve 1.0 10.50 kg

Dyeing13 Rea yellow HW 0.01% 0.131 kg14 Rea. Orange-MEZRL 0.07% 0.917 kg15 Syno. Red-HF6BN 0.80% 10.48 kg16 Salt 30 314.4 kg17 Soda ash 8 83.84 kg

After treatment:18 Acetic Acid 1.0 9.2 kg19 Soaping Asugal-ALBI 0.6 5.520 kg20 Colour Softener Gensoft-100/150/ASUMIN B 0.7% 9.170 kg

Recipe



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Textile finishing is a term commonly applied to different process that the textile material under go after pretreatment, dyeing or printing for final embellishment to enhance there attractiveness and sale appeal as well as for comfort and usefulness

Finishing



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Water Repellents Chemicals

Lurotex TX-C Anionic aqueous solution of inorganic saltsUniversal product, applicable for finishing woven-and knitted goods from cotton and blends of cotton with synthetic fibres.

Lurotex TX-S Especially suitable for finishing woven-and knitted goods from synthetic fibres and blends with cellulosic fibres. Very soft handle



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Antistatic Agents

Siligen APE Slightly cationic quaternary ammonium compoundFor antistatic finishing of natural or synthetic fibres and their blends. No adverse effects on the fabric handle.



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Additives and Binders

Perapret PU New

Polyurethane DispersionPolyurethane additive and binder for finishing textiles with and without pigments. Suitable for embossed and chintz finishes.



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Antipilling and Non Slip Finish

Perapret HVN

Antipilling agent and resin finishing additive for woven and knitted fabrics composed of cellulosic fibres and their blends with synthetic fibres. Increases tear strength and abrasion resistance.



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Crosslinking Agents

Fixapret AP Low formaldehyde modified dimethyloldihydroxyethylene urea Crosslinking agent for low-formaldehyde, wash-resistant resin finishing of woven and knitted fabrics composed of cellulosic fibres and their blends with synthetic fibres.



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Additives, Smoothing Agents and Softeners

Basosoft FB EUK Universal cationic softener for all fibres and blends, imparts a very soft handle. It can be used on loose stock, tops, yarn or piece goods, and applied by all sorts of different methods, such as dipping, padding and spraying

Siligen F Jet

Silicone fluid additive, softener and smoothening agent for woven and knitted fabrics composed of cellulosic fibres and their blends with synthetic fibres. Product has good shearing stability and is suitable for the exhaust application



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Optical Brightener Agent

Fluorescent Brighteners

Ultraphor FB CA Anionic high affinity fluorescent brightener for cotton, recommended for exhaust.

Ultraphor SFR Plus Liq

Stable, fluorescent brightener for polyester and blends. It has good fastness to sublimation.



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Thanks To All

