Department: Dyeing & Finishing.

1. Presentation on
BEXIMCO Textile Limited
Sarabo, Kashimpur, Gazipur.

2.  PRESENTED BY
Name Exam. Roll Registration No.
Jorjis Ridwan 234 345
Sabbir Ahammed 213 275
S.M. Riadul Zannat 228 330
Al Shaharir Shakib 226 313
Mahmud Sharif Bhuiyan 225 312

3.  CONTENTS
 General Information
 Factory Introduction
 Raw Materials Description
 Production Planning & Controlling
 Pre-Treatment Section
 Dyeing Section
 Finishing Section
 Quality Assurance Laboratory

4.  General Information
 Factory Name : BEXIMCO TEXTILE LIMITED
 Location : BEXIMCO Industrial Park (Sarabo, Kashimpur, Gazipur)
 Date of incorporation : 30 May, 1984
 Commercial production : 1990
 Business line : Manufacturing & Marketing of high Quality fabric.
 Listing status : Public listed company
 Number of Woven loom installed : 293
 Number of spindled installed : 119,520
 Number of Denim loom installed : 56
 Number of circular knit machine installed : 30
 Production Capacity : 28 Million LM
 Number of employees : 5181
 Website : www.beximco.org

5.  Factory Introduction
 BEXIMCO Textile Ltd. is one of the most modern composite mills in Bangladesh.
BEXIMCO Textile Ltd. has an installed capacity of 299 high-speed air-jet looms in
its weaving section and a high-tech dyeing and finishing section with a capacity of
100,000 yards of finished fabric per day. This company is located at the BEXIMCO
Industrial Park.
 Duration of Internship: 1 June to 31 July,2022

6. Organogram – Overall
Mgr.
Acting In
Charge
BTL Factory
Org. Chart for BEXTEX Limited:

7.  Honorable Buyers

8.  Raw Materials Description
Weaving:
 100% Cotton
 CVC (60/40, 80/20,90/10,55/45)
 PC (65/35,80/20)
 PC with Lycra
Dyeing:
 Gray Fabric
 Dyes
 Chemicals & Auxiliaries

9.  Production Planning &
Controlling
 Capacity planning
 Time and Action (TNA)
 Scheduling
 PP meeting
 Order allocation
 Man, power and machine allocation
 Execution of every task
 Materials planning and in-house follow up
 Delivery meet

10.  Pretreatment Section:
 Singeing:
Process for removing hairy/projecting fiber
 Singeing-Desizing Chemicals/Materials:
 Desizing Agent
 Deaerating Agent
 Wetting Agent
 Sequestering Agent
 Natural gas for burner, Steam, Compressed Air, Water.

11.  Desizing
 Process of removing sizing
materials.
 Singeing & Desizing Rout:
Grey fabric report checking
Lay in
Fabric stitching
Chemical Preparing (PH check)
Optimum Temperature rise up
Padder Pressure Setting
Production Fabric Stitching with guiding fabric
Singeing & Desizing start with proper flame- intensity
Rotation
Figure: Singe-Desize Machine.

12.  Scouring:
 Process to remove impurities such as: oils, waxes, fats, vegetable
matter, dirt etc.
Chemicals
• H2O2 (50%)
• NaOH (400 Be)
• Stabilizer
• Detergent/ Wetting agent
• Sequestering agent
Chemical Composition (ml/kg )
(24-30)
(30-34)
(5-6)
(4-5)
(1-2)

13.  Cold Bleach:
 Process to remove dirt, dust, husk,
leaf from the fabric and transform
it into permanent white by
chemical treatment in cold
condition.
 Cold Bleach Recipe:
 H2O2 (50%) 45g/l
 NaOH (400 Be) 30g/l
 OKM 8g/l
 WBL 8g/l
 S.FR 1g/l
 NBA 1g/l
 S.P.S 2g/l
Figure: Bleaching Machine.
Singing-Cold bleach Rout:
Grey fabric report checking
Lay in
Fabric stitching
Chemical Preparing (PH check)
Padder Pressure Setting
Cold Bleach start with proper flame intensity
Rotation

14.  Mercerization:
 Process to increase the dye absorbency, strength and luster of the
fabric by chemical treatment.
Chemicals/Materials used Chemical Composition
Sodium Hydroxide (NaOH) 280 Be (Baume)
215 gm/l
Acetic acid (99%) 5% of total water
Wetting agent: If required 3 gm/l
4gm/l [for Canvas, CN 082]
Compressed air As required
Steam, Water As required
Figure: Mercerization Machine

15.  Dyeing Section:
 Dyeing: Application of dyes or pigments on textile materials such as
fibers, yarns and fabrics with goal of achieving color.
 Solid Dyeing (PDB process): Process of applying dye to the mercerized
fabric.
 Recipe:
 Reactive dyes a-g/l
 Reduction Inhibitor b-g/l
 Anti-migrating Agent c-g/l
 Urea d-g/l
 Alkali e-g/l
 Wetting agent f-g/l
 Temperature 1500C -1700C
(All the chemicals are added according to fabric construction)

16.  Pad Dry Bake or PDB Process:
 Impregnate with dye and squeeze
of surplus liquor
 Partial drying of fabrics in IR-
section
 Complete drying of fabric in Hot
Flue
 Recipe:
 Reactive dyes
 Reduction Inhibitor
 Anti-migrating Agent
 Wetting Agent
Process Flow Chart:
Dyes + Soda Ash + Urea + Thermosol M.P.
↓
Padding
↓
Drying (130℃, 2 min.)
↓
Curing (160℃, 1 min.)
↓
Cold Wash
↓
Hot Wash (75℃)
↓
Cold Wash
↓
Ironing
↓
Shade check

17. CPB Process:
 Impregnate with dye and alkali squeeze
of surplus dyeing liquor
 Store wet for 8-12 hours (Batching)
 Wash-off
 QC check
 Carried out in 25-280C temp.
 Recipe:
 Reactive Dyes
 Reduction Inhibitor
 Urea
 Alkali-1
 Alkali -2
Process Flow Chart:
Dyeing
↓
Wrapping the fabric with polyethene
↓
Oven Drying (30 minutes)
↓
Hot Wash
↓
Cold Wash
↓
Ironing
↓
Shade check

18.  One–Bath Solid Dyeing process:
 Impregnate with dye and squeezing of surplus liquor
 Partial drying of fabric in IR-section
 Complete drying of fabric in hot flue
 Fixations of dyes by means of relatively very high temp. with dry air.
 Recipe:
 Disperse dyes
 Reactive dyes
 Reduction Inhibitor
 Anti-migrating agent
 Urea
 Dispersing agent
 Alkali

19.  Solid Dyeing with Vat
Dyes (Pad-Dry or PD
process):
 Impregnate with dye and squeezing
of surplus liquor
 Partial drying of fabric in IR-section
 Complete drying of fabric in hot
flue
 Recipe:
 Vat Dyes
 Dispersing Agent
 Anti-migrating Agent
Dyeing with vat dyes
↓
Rinse with cold waste
↓
H₂O₂ treatment (60℃, 2 minutes)
↓
Hot Wash
↓
Neutralization with Acetic acid
↓
Ironing
↓
Shade check
Process Flow Chart:

20.  Solid Dyeing with Pigments:
 Impregnate with pigments and
Binder squeeze of surplus liquor
 Partial drying of fabric in IR-
section
 Complete drying of fabric in hot
flue
 Fixation (Binding) of pigment by
means of relatively high
temperature with dry air
 Recipe:
 Pigments
 Binders
 Anti-migrating Agent
 Washing Process:
 Process to remove
impurities through
water treatment.
 Washing Chemicals:
 Water
 Steam
 Detergent/Soap
 Compressed air

21.  FINISHING SECTION:
Finishing: Process to provide required quality to the fabric.
 Refinishing & Topping: Refinishing
and topping is a repetitive finishing
process to minimize the dyeing as per
the customer swatch.
 Equipment: Monforts Stenter
Machine – I, II & III
Textile Finishing
Chemical
Finishing
Mechanical
Finishing

22.  Heat Setting and Stretching:
 Heat setting is a mechanical process to give dimensional stability and
shrinkage control.
 Equipment: Monforts Stenter Machine
 Materials/Chemicals used:
 Sometimes wetting agents (e.g. Mixture of surface-active
compound) are used as chemical for the Heat Setting and Stretching
process

23.  STENTERING:
 A process for drying and heat
treating fabric after wet
processing.
 Chemicals/Material for
Colored Fabric :
 Softener
 Dye Fixer (It is used according to
the color fastness)
 pH adjusted with Acetic acid
 Anti-foam, for 100% Cotton and
Twill Fabric (for deep shade)
 Chemicals/Material for White
Fabric :
 Cotton OBA (Optical
Brightening Agent)
 Polyester Cotton OBA
 Softener
 Tinting Agent
Fig.: Stenter Machine

24.  SANFORIZING:
 A mechanical process for
shrinkage control.
 Materials/Chemicals used:
No chemical is used for
Sanforizing machine.
 Company name : Changzhou Hongda Technology
 Model : LMA451B-240
 Power : 380 V 3P
 Frequency : 50 HZ
 Capacity : 48 KVA
Fig.: Monforts Sanforizing machine.

25.  EMERIZING:
 A mechanical treatment of fabric in the emerizing machine for giving the
fabric a soft hairy appearance by protruding the fiber from the fabric
surface.
 Materials/Chemicals
used :
 Emery Sticks and Emery
paper and brush with
different grades are used
in this process. Chemicals
are not used directly on
the Emerizing Machine.
Figure: Emerzing Machine

26.  CALENDARING:
 A finishing process to achieve effects like smoothing effects, luster effects,
handle effects.
 4 types of calendaring are done :
 a. Chintz calendar (smoothing effect -
with paper roll and steel roll)
 b. Ironing (Soft, smoothing and
glazing effect - with steel roll)
 c. Calendaring for smooth surface
(Mating effect-with cotton)
 d. Calendaring (Soft and Smoothing
effect-with cotton roll, paper roll and
steel roll)
Figure: The Ramisch Calendaring
Machine

27.  Quality Assurance Laboratory
 Wet Test:
 Color fastness to Washing
 Color fastness to
Perspiration
 Color fastness to Sea water
 Physical Test:
• Tear Strength Test
• Tensile Strength Test
• Seam Strength Test
• Abrasion Resistance Test
• Color fastness to Rubbing
Laboratory Tests
Purpose: To assure required quality.

28.  Tear Strength Test:
 Purpose: Determination of strength
against tear force of the fabric.
 Apparatus: Elma Tear Machine
 Sample size: Sample fabric size is of
10cm x 6.3cm
Figure: Elma Tear Machine

29.  Tensile Strength Test:
 Purpose: Determination of tensile strength of woven
fabric against tensile force.
 Apparatus: Tensile strength tester
 Sample size: Sample fabric size is of 10cm x 15cm
Figure: Tensile strength tester
 Seam Strength Test: (EN ISO 13936-1)
 Purpose: Determination of strength of sewed fabric
against tensile force. a
 Apparatus: Tensile strength tester
 Sample size: Fabrics are to be sewed by taking 12mm
distance from the edge.

30.  Pilling Test:
 Purpose: Determination of
pilling formed in the fabric.
 Apparatus: Nu-Martindale
Machine.
 Sample size: Sample fabric dia.
is of 38cm
Figure: Nu-Martindale Tester
Abrasion Resistance Test:
Purpose: Determination the abrasive
resistance of fabric.
Apparatus: Nu-Martindale Machine.
Sample size: Sample fabric dia. is of
15.2cm

31.  Color Fastness to Rubbing:
 Purpose: This test is done to determine the
color fastness of fabric against rubbing.
 Apparatus: Crockmaster Machine,
Rubbing cloth, Gray scale
 Sample size:
Specimen size:14cm x 5cm
Crocking cloth: 5cm x 5cm
Figure: Crockmaster Machine

32.  Color Fastness to Washing:
 Purpose: Determination of color fastness to domestic washing &
drying.
 Apparatus: Gyro wash, Multifiber, Gray scale, Light source D-65
 Sample size:
 Dyed sample:10cm x 04cm
 Multifiber: 10cm x 04cm
 Recipe:
 Detergent : 5gm/L
 Sodium Carbonate : 2gm/L
 Temperature x Time : 95℃ x 4 hours
 No. of stainless-steel boll : 10
 M:L : 1:50