2. What causes static charge in textile fibre?
• Fibres having low moisture regain have low electricity
conductivity (insulator) which leads to cause a static
charge, which can be seen in synthetic fibres.
• When this fibre rub with other object (specially metals),
static electricity is generated which causes difficult to
spin the fibre as they stick to it and also cause material
handling problem.
• This electrical charge can cause fibres and yarn to repel
each other, leading to ballooning.
• And also attracts soil.
5. Anti static property can be brought by-
I. By reducing the charge.
II. By increasing the surface conductivity.
III. By making the fibre hydrophilic.
Types of antistatic finish-
• Non durable
• Durable
6. NON DURABLE FINISH
Non- durable antistatic agents are
preferred for fiber and yarn
processing finishes since ease of
removal is important.
• Esters of phosphoric acid
• Quaternary ammonium
compounds
• Non-ionic compounds such as
ethoxylated fatty esters, alcohol
and alkyl amines
7. DURABLE FINISH
The basic principle is to form a cross linked polymer
network containing hydrophilic groups.
• Poly hydroxy poly amines (PHPA) or poly alkylene
• Poly acrylic copolymers
• Poly epoxides
8. Applications:
Although antistatic finishes applied after dyeing or
printing is more common with hydrophobic fibres, fabrics
made from cotton, rayon and wool may also be antistatic
treated depending on the intended use. The textile products
that are treated with antistatic finishes includes –
a) Carpets for computer room.
b) Upholstery fabrics and airbags for automobiles.
c) Conveyor belts.
d) Filtration fabrics.
e) Airmail bags, parachutes.
f) Fabrics for hospital operating rooms and
g) Protective clothing for work with flammable gases,
liquids and powdered solids
