1) Denim fabric is traditionally made from dyed warp yarns and undyed weft yarns in a 3/1 twill weave. It gets its name from Nimes, France where the fabric originated. 2) The denim manufacturing process involves yarn spinning, ball warping, rope or slasher dyeing, beaming, sizing, and weaving. Ball warping involves pulling yarns through a reed to keep them parallel before winding onto a log. 3) Rope dyeing is a discontinuous process where yarn is dyed in rope form, allowing for less shade variation than slasher dyeing which

1. Presentation on
Denim Fabric
Submitted By
Md.Abubakkar
Student id:135048
Submitted To
Shamsuzzaman Sheikh
Assistant professor
Department of Textile Engineering
DUET,Gazipur

2. Features of Denim fabrics
 The word denim is come from an Anglicism of the Franch for’Serge de Nimes. Serge
means fabric, made in Nimes,Franch.So it is called denim fabric
 Denim is traditionally a 3/1 warp face till fabric made from dyed warp yarn and undyed
weft yarn.
 Its mass per unit area is expressed by oz/𝑦𝑑2
 Denim fabric is used to make pants,skirts,jackets,shirts etc

3. Flow chart of Denim Manufacturing
Yarn spinning
Ball warping
Rope dyeing
Re-beaming
Sizing
weaving
Beam warping
Slasher dyeing
Sizing
Weaving

4. Ball Warping:
Creel Section :
• Package Holder
 Sensor
 Ceramic Guide
Head Stock :
 Motor
 Counter Roller
 Hook
Reed
Control Panel

5. Ball Warping process:
 In ball warping, 350 to 500 yarn ends are pulled from the
creel. The yarns then pass through a comb-like device (reed),
which keeps each warp yarn separate and parallel to its
neighboring ends.
 At intervals of every 1000 or 2000 yards, a lease string is
placed across the sheet of warp yarns to aid yarn separation.
 The yarns then go through a funnel-shaped device called a
trumpet or condenser, which collapses and condenses the sheet
of yarn into rope form.
 The rope is wound onto a long cylinder called a log on a
machine called as a ball warper.
 Indigo dyeing will take place at rope form. Yarn path diagram
of Ball Warping

6. Dyeing Process
Rope Dyeing
 It is discontinuous process.
 Yarn is dyeing in rope form.
 It is modern process and high production rate.
 This process minimize cross shade variation.
Slasher Dyeing
 It is continuous process
 Yarn is dyeing in sheet form
 It is old process
 Cross shade variation is found
Rope dyeing

7. Long Chain Beamer
 Different parts of long
chain beamer
 Can
 Accumulator
 Tension Stand
 Reed
 Counting Roller
 Beam

8. Types of Sizing
• Surface sizing
• High viscosity
• Low squeeze pressure
• High drying temperature
• Characteristics
• High abrasion resistance
• Poor working performance
• Low hairiness factor
Surface sizing

9. • Core Sizing
• Requirement:
• Low viscosity
• High squeeze pressure
• Low drying temperature
• Characteristics
• Poor abrasion resistance
• High working performance
• High hairiness level
Core sizing

10. Mantle sizing
• Requirement
• High viscosity/high squeeze force
• Low viscosity/low squeeze force
• Maximum allowable drying temperature
• Characteristics
• Good abrasion resistance
• Good working performance
• Low hairiness level
Mantle sizing

11. Diversification of Denim Fabric
 By change EPI,PPI.
 By change yarn count.
 By use fancy yarn.
 By use lycra yarn.
 By use different count yarn in consecutive insertion

12. Reference
1.Understanding textiles for a merchandiser by Shah Alimuzzaman
Belal.Published by LB graphics and printing
Dhaka,Bangladesh,may 2016[283-287]
2.Technology of Denim Manufacturimg by Md.Ershad
Khan.Published by book fair publication,2010[18]