Here people gather knowledge about friction and also in textile fiber, fabric impact of friction, the importance of friction, etc.

1. MD. RAISUL ISLAM
RIFAT
ID: 181-23-5236
SEC: A
TEXTILE ENGINEERING

2. Importance of Friction In Textile Industry

3. Introduce To Friction
* Friction is the force that resists the
movement of a surface over another
surface during sliding.
* When the textile materials are
processed, then friction is developed
between the fibers.

4. Types of Friction
There are two types of friction.
Static friction: The force that must
be overcome in order to start
sliding is called static friction.
Kinetic friction: The force that
resists continued sliding is known
as kinetic friction.

5. Frictional properties
1. Composition of the material
2. State of the surface of the material
3. Pressure between the surfaces
4. Temperature
5. Relative humidity %
6. Area of contact
7. Water absorption of fiber

6. Co-efficient of friction
Frictional force is proportional to the normal or perpendicular of a material due to
its own weight.
That is, F ∞ N Or, F = μ N Or, μ = F/N
Where, F = Frictional force, N = Normal / perpendicular force. Here, μ is the
proportional constant known as “co-efficient of friction”. So, co-efficient of
friction can be defined as the ratio of frictional force and perpendicular force.

7. Methods of measuring co-efficient of
friction
Capstan method is most commonly used to measure co-efficient of fraction.
Capstan method can be classified into two classes-
1. Static capstan method
2. Dynamic capstan method
Other methods-
1. Buckle & Pollitt’s method
2. Abboh & Grasberg method
3. Gutheric & Olivers method

8. Frictional properties influences
In fiber stage
1. The behavior of fiber during drafting.
2. The frictional force holds together the fiber in yarn, i.e, frictional force helps to
spun the fiber to yarn.

9. Frictional properties influences
In yarn stage
1. If the frictional force is too low, yarn strength will be low.
2. Friction increases the luster and smoothness of yarn.
3. Friction makes more clean yarn.
4. Friction increases hairiness.
5. Friction occurs nep formation.

10. Frictional properties influences
In fabric stage
1. Fabric feelings varied for difference between static and kinetic friction.
2. Fabric will be slippery if µs >µk is high. Fabric will be harsh if µs >µk is low.
Here, µs= Co- efficient of static friction, µk= Co-efficient of kinetic friction.
3. If the frictional force is high the handle properties of fabric quality will be low.
4. High static friction causes high breakage of yarn in weaving.

11. Factors affecting frictional intensity
1. Load
2. Area of Contact
3. Speed of sliding
4. The state of Surface
5. Effect of absorbed water

12. Importance of friction in Textile
Industry
1. Friction holds the fiber in a sliver and hence material does not break due to self
weight.
2. Friction helps in drafting and drawing process.
3. Uniform tension can be maintained in winding and warping because of friction.
4. Friction helps in twisting during spinning.
5. Friction modifies the luster and appearance of a cloth.
6. Friction makes more clean yarn.