This presentation discusses the properties of fibers used in textiles. It begins with an introduction of the presenters and defines a textile fiber as having strength, flexibility, and sufficient length to be spun. The document then categorizes fiber properties into mechanical, chemical, and thermal properties. Under mechanical properties, it focuses on tensile properties like stress-strain curves, and frictional properties. For chemical properties, it discusses water absorbency, interaction with acids and alkalis. Thermal properties depend on the amorphous and crystalline regions of fibers which influence properties like absorbency when heated.

1. Welcome to
Our
presentation

2. Presented BY
 Md.Muhib-Billah
ID:151-23-4182
Md.Kazi habibur Rahman
151-23-4231
Anfal ahammed jisan
151-23-4261

3. Properties of Fiber
The basic component
of every product in textile called is
fiber
But not all fiber is used for textile
Textile fiber defined by strength,
Flexibility and the length required to
Be spun.
Definition
of Fiber

4. Classification of fiber properties
Fiber
properties
mechanical properties
Chemical properties
Thermal properties

5. Classification of mechanical properties
Mechanical
properties
Tensile properties
Torsional properties
Frictional properties
Flexural properties

6. Tensile properties
 Tensile properties indicates how a material (fiber) will react
to the forces being applied in Tension.
Tensile properties depends
on
The material and
its condition Dimension
Nature and time
test

7. stress-strain curve
When an external force is applied to
a Fiber it is balanced by the internal
force development in the molecular
structure of the fiber. By increasing
the stresses, material will deform and
follow the load-elongation/stress –
strain curve.

8. Frictional properties
Friction is the force that resists the movement of a surface over
another surface during sliding. When fibres are processed in
textile industry, friction is developed between them. Due to the
friction, the properties shown by textile fibres are called as
frictional properties.
Types of friction in
fiber
Inter fiber friction Fiber-Non fiber friction

9. Importance of friction in textile
Friction holds the fibre in a sliver and hence material does
not break due to self weight
 Friction helps in twisting during spinning.
 Friction helps in drafting and drawing process.

10. Thermal properties
 The property which is shown by textile fiber when it is
subjected to heating is called thermal properties
Amorphousness
Crystallinity
Depends
On

11. Continue
Amorphousness: Amorphous region of the fiber is
the region where amorphous orientation of polymer
is present. In amorphous region the polymers are
oriented or aligned at random.
Crystallinity: crystalline region of the fiber means
where crystalline orientation of polymers is found.
In the crystalline area Hydrogen bonding and Vander
Walls forces occur.

12. Chemical properties
Water
Absorbency
Acid
Alkali
Depends
on

13. Chemical properties
 Water: Hydrophobic and Hydrophilic are the two classification of fiber according to
the interaction of fiber with water. The fiber which has no joint for water that
means less absorbency is called hydrophobic.
 Absorbency: Absorbency means the ability of the fiber to retain the water which
depends on the ratio of fiber’s amorphous and crystalline region because this
ration determines the polarity of the polymers.
 Acid: Interaction of different fiber with acid variable. To avoid the harmful effect
on fiber different acid should be chosen carefully which will not harm fiber but
bring the required change during the manufacturing process.
 Alkali: Like acid interaction of fiber varies with the different alkalies. Such as mild
alkali don’t have any harmful effect on wool but high concentration of caustic soda
has harmful effect on wool.

14. Thank you