properties of wool

1. Welcome To My Presentation
Md. Mahmudul Hasan
ID: 123-23-3201
Dep. Of Textile Engineering
TE – 22 Batch
Sec : PC-A”

3. Wool is a natural protein fiber. The finest wool is collect from
young sheep. Sheared wool is called fleece or clip wool and
wool taken from the hides of slaughtered animal is called
pulled wool which is inferior in quality to fleece or clip wool.
The earliest fragments of wool fabric have been found in Egypt
but Mesopotamia is the birth place of wool.

4. MANUFACTURING PROCESS OF WOOL

5. CHARACTERISTIC OF WOOL:
 The wool they are composed of amino acids.
 They have excellent absorbency.
 Moisture regain is high.
 They tend to be warmer than others as they are
bad
 Only natural fiber which has low tenacity or
strength.
 They have poor resistance to alkalis but good
 They have good elasticity and resiliency
 Conductors of heat.
 Resistance to acids.

6. Components Percentages
Keratin 33%
Dust 26%
Suit 28%
Fat 12%
Mineral matter 1%
Total: 100%

8. Fig: Symmetric diagram of wool fiber

9.  Effect of Acid: Concentrated HNO2 and H2SO4 destroy the
fiber.
 Effect of Alkali: Destroy all bonds in wool fiber.
 Effect of Bleach: Harmful.
 Heat: wool fiber decomposed at 204°C.
 Dye Ability: Easy to dye, reactive dyestuff is suitable.

10.  Specific Gravity: 1.31
 Moisture Regain: 13-16%
 Tenacity: At dry 1.35 g/d
 Breaking Extension: 42.5%
 Recovery: 69% at 5%

11. ADVANTAGE OF WOOL:
 tough, durable and a resilient animal fiber
 soft touch and luxurious look
 absorbent, elastic, comfortable and
washable
 can resist the effects of mild acids
 good insulator
 naturally flame resistant

12. DISADVANTAGES OF WOOL:
 can be delicate and expensive when taken
from goats
 is weak and sensitive to alkaline
 expensive
 can be itchy
 stains easily

13.  In addition to clothing, wool has been used for
blankets, horse rugs, saddle cloths, carpeting, felt,
wool insulation (also see links) and upholstery.
 Wool felt covers piano hammers, and it is used to
absorb odors and noise in heavy machinery and
stereo speakers.