Technical Information

All products are tested to ensure critical end-use specifications are met. Our test laboratory performs testing procedures on air

permeability. This is the checking of volumes of air that are able to pass through the fabric and inspection of the product weave to ensure

that it meets specification. These testing procedures are especially critical for products used in filtration processes.

Technical Fabric Testing

A fabric’s air permeability is a measure of the extent to which it allows air to pass through it. The ease or otherwise of passage of air is of

importance for a number of fabric end uses such as industrial filters, tents, sailcloth’s, parachutes, raincoat materials, shirting’s, downproof

fabrics and airbags. The Shirley Air Permeability tester is used here, using an average of five tests done on different samples, The air

permeability of the samples is defined as the volume of air in millilitres which is passed in one second through 100s mm2 of the fabric at,

a pressure difference. A mean value is drawn from the five samples to arrive at a metric measure

Properties of Cotton Fabric

Molecular Structure

  • Cellulose

Macroscopic Features:

  • Length: 10-55mm Staple Fibre
  • Cross Section: 12 TO 20 Microns Wide
  • In Forms of Convoluted Ribbon.
  • Colour: White – Cream – Brown
  • Light Reflection: Dull, Low Lustre

Physical Properties:

  • Tenacity: 25-45 Cn/tex @65% RH 30-53 Cn/tex @100% RH

    Wet Strength Increase OF 110 – 120%

  • Elongation: 3 – 7 % at break
  • Strecth & Elasticity: Low Only 70% Recovery @ 2% Extension
  • Resiliency: Low
  • Abrasion Resistance: Fair to Good

  • Dimensional Stability: Reasonably good although fabrics may shrink during Laundering.
  • Moisture Regain: 8,5% @ 65% RH 15 – 25% @65% RH. This is slightly increased by Mercerization

  • Melting Point: N/A

  • Density: 1,54 G/CCM

Chemical Properties:

  • Effects of Bleaches: Highly Resistant

  • Acids, Alkalis and Solvents: Highly Resistant to Alkalis strong ACIDS & hot dilute ACIDS Will cause Disintergration
  • Sunlight: Withstands High Temperatures well prolonged exposure to light will cause yellowing due to oxidation
  • Resistance to Stains: Poor resistance to water born stains
  • Dyeability: Good affinity to dyes

    Dyed with direct, VAT & basic dyes

    Vat Dyeing Produces Excellent wash and light fastness


  • Flammability: Burns rapidly with smouldering red alterglow
  • Thermal Conductivity: Low/when dry
  • ‘Electrical Conductivity: Relatively High.