The document discusses the mechanical properties of yarn, including tensile, flexural, torsional, and frictional properties. It also examines the bulk properties, surface properties, and transfer properties of textile materials. Finally, it analyzes the effect of fiber length, fineness, and strength on various yarn properties such as strength, hairiness, handle, lustre, evenness, count, processing efficiency, and production.

1. Mechanical Properties of Yarn
 Tensile Properties
 Flexural Properties
 Torsional Properties
 Frictional Properties
Copyright © 2009 Tamim Kibria, Souteast University

2. Tensile Properties
 Elasticity
 Elastic Limit
 Plasticity
 Elongation
 Breaking Point
 Breaking Extension
Copyright © 2009 Tamim Kibria, Souteast University

3. Properties of Textile Material
 Bulk Properties
 Surface Properties
 Transfer Properties
Copyright © 2009 Tamim Kibria, Souteast University

4. Bulk Properties
 Uni-axial Tension
 Compression
 Bi-axial Tension
 Shear
 Bending Behaviour
 Torsional Characteristics
 Dimensional Stability
Copyright © 2009 Tamim Kibria, Souteast University

5. Surface Properties
 Handle
 Roughness
 Wear resistance
 Friction
Copyright © 2009 Tamim Kibria, Souteast University

6. Transfer Properties
 Air Permeability
 Water Permeability
 Filtration Efficiency
 Penetration Resistance
 Heat Transfer
Copyright © 2009 Tamim Kibria, Souteast University

7. Effect of fibre length, fineness and
strength on yarn properties
 Fibre length
1. Yarn strength
2. Yarn hairiness
3. Yarn handle
4. Lustre
5. Yarn evenness
6. Yarn count
7. Processing efficiency
8. Production
Copyright © 2009 Tamim Kibria, Souteast University

8. Fibre fineness
1. Yarn strength
2. Lustre
3. Flexibility
4. Torsional property
5. Spinning limit
6. Yarn count
Copyright © 2009 Tamim Kibria, Souteast University

9. Fibre Strength
1. Yarn strength
2. Fibre damage
3. Spinning performance
Copyright © 2009 Tamim Kibria, Souteast University

10. Fibre Strength
1. Yarn strength
2. Fibre damage
3. Spinning performance
Copyright © 2009 Tamim Kibria, Souteast University