Quality of a fabric for clothing depends on a great extent on aesthetic, durability and comfort aspect. While aesthetic & comfort performance is a desirable in clothing, utility is the key requirement in fabric. New technologies are having dramatic effect on textiles, retailers are trying to distinguish their products from others, & to give a value added feature to their fashions by means of technical fibers & finishing. For example, manufacturers are starting to treat their clothing with Teflon fabric protector.


What is Teflon?


Generally, the coating that makes cooking utensils non-sticky is called Teflon. Scientifically, it is trade name for a solid, chemically inert polymer of Tetrafluroethylene (CF2CF2) - It is colorless. Odorless, flouroplastic which has m.w. of 30000, it stable up to 300C .The following properties are typical of PTFE.


PTFE Properties

Value

Tenacity g/d

2

Elongation (%)

25

Limiting Oxygen Index

95

Chemical Resistance

Excellent

Friction coefficient

0.2

Operating Temperature

500

PTFE form

Application

Needle Felt

Hot Gas filtration release fabrics, conveyor belts, mechanical rubber goods.

Wet-laid nonwoven

Gasket Tape Battery, separators, heat shields, liquid filters.

Membrane

Filtration


The Teflon® trademark was registered in 1945. The Teflon flouro polymer family consists of PTFE, (the original resin), FEP, (introduced in 1960), Tefzel® ETFE (introduced in 1970) & PFA (in 1972).


Some Facts

  • PTFE fluoropolymer resin is listed in the Guinness Book of World Records as the worlds most slippery substance. So, it is a non-stick substance.

  • It is resistant to most of the chemicals like NH3, H2So4, HCL, Acetic Acid, Chlorine, and Ozone. The only chemicals known to affect their coating are molten alkali metals & highly reactive fluorinating agents.

  • Very few solid substances will permanently adhere to a Teflon coating, while tacky materials may show some adhesion, & almost all substance release easily.

  • It has excellent electrical properties making it suitable for use as an insulator in cables & connector assemblies.

  • It has been involved in the U.S. Space Programme. The moon module included several applications of Teflon including space suits & blankets, heat shields & insulation.

  • Light bulbs are shatter proof due to a Teflon coating.

  • It is used to protect the statue of liberty.