Auxiliaries & chemicals required in dyeing and finishing

School of Science and Engineering, Department of Textile EngineeringSoutheast University Classification of Dyeing Auxiliaries Enzyme Bleaching agent Soaping Agent Optical Brightener..

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Auxiliaries & Chemicals

Required in

Dyeing and Finishing

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Name : MAZADUL HASAN SHESHIR

ID: 2010000400008

Batch: 13th Batch (Session 2009-2013) Department: Wet Processing Technology Email: mazadulhasan@yahoo.com

Blog: www Textilelab.blogspot.com

Southeast University

Department of Textile Engineering

PREPARED BY ©right

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School of Science and Engineering, Department of Textile Engineering

Southeast University

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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

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Some Auxiliaries

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Some Auxiliaries

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Hydrochloric Acid

Some Auxiliaries

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Classification of Dyeing Auxiliaries

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

H 2 O 2

Bleaching agent

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Peroxide Killer

It is used in the removal of residual hydrogen peroxide used in

bleaching of textiles before dyeing

Example

of PK

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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 Regulators

Eulysin PC

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Levelling Agent.

Trade Name Form lonic * Application

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 temperature jet dyeing

high-Levelling Agent use for polyester fabric

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Levelling Agent

Levelling Agent use for Nylon

Trade Name Form lonic * Application

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 Mercerized cotton is often used in cotton crafts and yarns

NaOH

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

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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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 thickner Very 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 polymer

Synthetic 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

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

Fixation 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

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

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Softeners

Softener, improves fastness giving high quality pigment prints having soft handle & high dry rubbing fastness Improves colour brilliancy

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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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(g/l or %)

Total amount

Pretreatment:

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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 salts

Universal 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

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Antistatic Agents

Siligen APE Slightly cationic quaternary ammonium compound

For 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 Stable, fluorescent brightener for polyester and blends It has

good fastness to sublimation

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Thanks To All

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Southeast

University

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