Company

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INTRODUCTION

MD. ASADUZZAMAN (PROTIK)

ID: 122-202-041

BSc. In Textile Engineering

Garments dyeing

Dyeing of fully

fashioned garments

Add color to finished garments

Just in time dyeing

PPT/PAT/RFD

Sewn “Raw” &

dyed after sewing

GARMENTS DYEING

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..

CATEGORIES OF GARMENT DYEING

CATEGORIES

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REASONS OF GARMENTS DYEING

Cost effectiveness

Quick response to market

Dyeing with require quantities

Time reduced

Energy saving Special design Dyed with single color

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SELECTION OF MATERIALS

• Loom state fabric

converted into

RFD

• Fabric pre-

treated.

• Free from foreign

materials.

• Same batches

fabric.

• Should be

uniform.

• Interlining

checking

• Button, Studs

& zippers.

• Free from

nickel.

• Polyester

button for pre

determined

colour

• Nylon

preferred

• Wooden to be

verified.

• Care label &

Embroideries.

• Cotton thread is

preferred.

• Core spun yarn

is used

• Low tension

apply

• High strength.

• Free from

hairiness

• Polyester

thread with pre-

determined

colour.

• Stitch

density

• Thread

tension

• Stitch &

seam type

• Needle size

AccessoriesFabric Sewing Thread Sewing

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DYES USED FOR COTTON GARMENTS

Reactive Dyes

Direct Dyes

Vat Dyes

SulphurDyes

Pigment Dyes

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REQUIREMENT OF DYE STUFF SELECTION

Fastness

Cost of dye

Shade range

Machine parameters

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Versatile machine(Temp.140 deg)

Horizontal

Lateral oval

High Temp

PADDLE DYEING MACHINE

DRUM DYEING MACHINE

ROTARY DRUM DYEING MACHINE

•Multi purpose drum machine.•Dyeing temperature at 140 deg.

•Perforated drum m/c.•Divided into four equal compartments.

GARMENT PROCESSING MACHINES

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HYDRO-EXTRACTOR MACHINE

TUMBLE DRIER

•Ideal machines for extraction of water.•Has a central rotating basket ball.•Machine is mounted on a triangle base.

•Used after washing & dyeing.•Perforated stainless steel drum.•Loading & unloading done in front side or top of the machine.•Air comes out through exhaust duct.

GARMENT PROCESSING MACHINES

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1 2 3

6 5 4

7 8 9

Garments from grey Fabric

Desizing Scouring

BleachingDyeingAfter treatment

Washing & Rinsing Hydro-

extractionDrying

Rinsing

WOVEN GARMENTS DYEING SEQUENCE

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WOVEN GARMENTS MADE FROM

PRE-TREATED FABRIC

Pre-wash After

treatment

Washing

& RinsingDryingHydro-

Extractor

Garments Dyeing

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Flow chart for Knit Garments

PlanKnit wear

Build

DyeingAfter

Treatment

Washing &

Rinsing

Hydro

-extractionDrying

Scouring &

Bleaching

Washing

/Desizing

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TECHNIQUE USED FOR GARMENTS DYEING

Tie dyeing

Dip Dyeing

Spray Dyeing

Over Dyeing

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TECHNIQUE USED FOR GARMENTS DYEING

Cold Dyeing

High White Dyeing

Washable Dyeing

Reverse Dyeing

Top Dyeing

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Over dyed

Dip dyedSpray dyed

Evaluate

Tie dyed

Top dyed Cold dyed

Different Technique applied garments

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SPECIAL CHEMICALS

• . Desizing Agents Scouring & Bleaching Agents

Material Damaged Control Agent Others specials

• Bacterial Alpha amylase

• Non-ionic wetting agent

• Biolase , Bactosol

• Sandopan LFW

• Sirrix A.K

• Sandoclear 8160, Sandopan SF

• Lanalbin PA Powder

• AWN

• Imacol brand

• Sanden 8425

• Drimagen E2R

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Mechanical finishing and Related

process

Using

MicroprocessorSteaming

treatment

Pressing stretching Ironing

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SMART COLORANT FOR GARMENTS

Color respond to differences

temperature.

Color respond to differences

environmental conditions.

Developed for specialized

applications but now have become

available for application on

textiles/garments.

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CLASSIFICATION OF SMART COLORANTS

Photo chromic

color

Thermo chromic

color

Glow in the dark

color

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PHOTO CHROMIC COLOR

Ability to change color when exposed to sunlight.

Generate dynamic reversible color change

UV: Change molecular Structure of photo chromic material

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COMPARISON

…… . Dyeing after garment garment making. making.

Les time required.

Low cost of production

GSM increased after dyeing.

No possibility of shade variation.

Sewing thread used from same fiber.

Belly machine used.

Garment Dyeing

………… Dyeing before garment making.

More time required

High cost of production.

GSM also increased.

Possibility of shade variation.

No need of sewing thread.

Jet/jigger/pad/winch used.

Fabric Dyeing

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CONSTRAINTS OF POST DYEING

Not suited to all Fabric

Desired final appear

ance are not availab

le

High damag

e & repairs

rate

High risk of inappropriate sewing thread

Fabric shrinka

ge

Fabric swelling

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RECENT DEVELOPMENT IN GARMENTS PROCESSING

Inbuilt catalyst & softener.

Microencapsulated fragrance finishes.

Laser-based processing.

Use anti microbial finishes.

Water & oil repellent finishes.

Flame-retardant finishes.

Antiozonate finishes.

UV absorber finishes.

Coating individually.

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SUPERIORITY & DISFAVOR

Superiority

Handling of smaller lots economically.

Enables various special effects to be achieved.

Distressed look can be effectively imparted.

Unsold light shade can be converted into medium and deep shades.

Lowest energy consumed.

Latest fashion trends can be effectively incorporated by immediate feedback from the customer.

Disfavor

High cost of processing.

A little complicated dyeing.

Garment accessories like zips , buttons etc impose restrictions.

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Traditional route can be compared with the garment dyeing route

Discontinuous/continuouspreparation

Discontinuous/continuousdyeing

Finishing

Delivery to Garment manufacturer

Cutting/sewing

Storage

Sales

Discontinuous/continuouspreparation

Delivery to Garment manufacturer

Cutting/sewing

Storage

Dyeing

Sales

Mean

total tim

e app

rox 8

wee

ks

Traditional Method

Woven/Knits

Garment dyeing Method

Woven/Knits

Mean

Total tim

e 2 w

eeks

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Problem occurred in GMT Dyeing

Low tear strength of garments

Patchy dyeing

Smell Spotting

•Formation of foam

•Improper washing

Degredation of cotton during pretreatment,dyeing & resin finishing

Acetic acid,residual chlorine,cationic softeners.

•Starting tem. Too high.•Raising temp. too quickly.•Salt addition at high temp.•Addition of dyes & chemicals at once.

CAUSE AND EFFECTS

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CAUSE & EFFECTS

Change in PH during cationization.

•High rate of rinse in temperature during cationization.•Direct contact of steam with garment•Too low MLR hence uneven build- up of cationizer.

Dyeing may cause corrosion to metalic parts like buttons, zippers etc.

•Chlorine retention•High dosage of cationic softener•Ozone fading.

Problem occurred in

garment dyeing

Blotchy/unlevel dyeing

Yellowing in denim

Corrosion in metalic

fittings

Batch to batch shade

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PRE-CAUTION TO BE TAKEN BEFORE GARMENTS DYEING

Specific dyes used.

Void mineral impurities.

Imacol brand.

Hot brand reactive dyes applying.

Made from same lot & same source.

Adjust seam strength.

Prevent seam pucker.

Proper dye selection.

Avoid poor quality metal.

Selection of sewing thread ,button.

Used copper free dye.

Used proper interlining.

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Reduce waste water

Reduce amount of dyes Reduce others chemicals

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AVOID ENVIRONMENTAL HAZARDS

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