Amit Biswas is a student in the Department of Textile Engineering at Green University of Bangladesh with ID number 143003014. The document discusses acrylic fibers, which are synthetic polymers composed of at least 85% acrylonitrile monomer units. Acrylic fibers are resistant to water damage, sunlight, mold, mildew, and insects but are flammable. The document also discusses the properties, manufacturing process, uses, and comparisons of acrylic and wool fibers.

1. Amit Biswas
ID: 143003014
Department of Textile engineering
Green University of Bangladesh

3. Acrylics:
 A manufactured fiber in which the fiber forming substance is
any long chain synthetic polymer composed of at least 85% by
weight of acrylonitrile units . these fibers have an average
molecular weight of ~100,000, about 1900 monomer units.
Acrylonitrile:
 The substance from which acrylic fibers are made and from
which the generic name is derived was first made in Germany
in 1893 .

4.  Resilient and retains shape
 Quick drying
 Resistant to water damage, sunlight and does
not fade
 Resistant to mold, mildew and insects
 Flammable

5. Effect of acids Damage by strong concentrated acids. Good
resistance to mineral acids
Effect of Alkali Resistance to weak alkali but affected by strong
alkali.
Effect of Solvents Resistance to common solvents
Effect of Bleaches Resistance to bleaches.
Effect of Heat Most heat sensitive
Effect of Dye Acid, basic, cationic.
Effect of Light
Resistance but not for long time.

6. CH2 CH
|
CN

7. Photopolymer
Copolymer
Graft polymer
Bicomponent
Blends of various deniers
Blends of homopolymer and
copolymer
Helical, nonreversible crimp
Reversible crimp
Surface modified
Various cross section—round,
acorn,dog-bone
Variable dyeability –
cationic,disperse,acidic,basic
Solution dyed

8. FAVOURABLE UNFAVOURABLE
Light weight Has only fair strength 20% weaker when wet
Good drape, Wool like hand Hydrophobic fiber(1 1/2% moisture regained )
Good resiliency and elasticity Static and pilling a frequent problem
Excellent resistance to sunlight and weathering Abrasion resistance is fair
May be washed or dry-cleaned Resistant to water borne stains and odors
Good quality of wicking which adds to comfort in wearing
Durable
Highly degradation resistant to dilute acids, both organic
and mineral .orlon is resistant to strong acids as well .also
to dilute Alkalis ,likely to be found in home cleansing
agents.
Dyeable to bright shades with excellent fastness
PHYCAL PROPERTIES

10. The acrylic process is a "one step technology", with
the following main characteristics
1. polymerization in solution
2. direct feeding of the dope to spinning
3. wet spinning.
4. DMF as solvent for both polymerization and spinning

12. S.N
O FIBER PROPERTIES ACRYLIC WOOL
1 EFFECT OF ALKALIES Resistant to weak Alkalis Harmed
2 EFFECT OF ACIDS Resistant to most acids Resistant to weak acids
3 EFFECT OF SOLVENTS Can be dry cleaned Dry-cleaning recommended
4 EFFECT OF SUNLIGHT excellent resistance Low resistance
5 STABILITY Generally retains shape Subject to letting shrinkage
6 PERMANENCE OF
CREASES
Creases can be set and
removed by heat
Creases set by heat and
moisture
7 EFFECT OF HEAT Thermoplastic sticks at 450-
490o F
Scorches easily , becomes
brittle at high temperatures
8 RESISTANTANCE TO
MOTHS AND FUNGI
resistant HARMED BY MOTHS ,mildew
forms on soiled , stored wool
9 EFFECT OF WATER None May felt or mat, noticeable
odor when met.

13. Raw wool acrylic

14.  Dresses
 Blankets
 Carpeting
 Children’s Garments
 Outdoor products such as
bunting and canopies.
 Sweaters
 Gloves
 Mats
 Knit Jersey
 Wrinkle resistant fabrics
 Pile and Fleece fabrics
 rugs

16. Thank you