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Comparision of basic properties of Varlan Fibre
SR. No. Property Varlan Wool Cotton Nylon Polyester
1
Tensile Strength (g/d)Dry
Wet
2.5~5.0
2.0~4.5
1.0~1.7
0.8~1.7
3.0~4.9
3.3~6.4
4.5~7.5
3.7~6.4
4.7~6.5
4.7~6.5
2 Knot Strength (g/d) 2.0~4.0 2.5~3.5 3.0~7.0 3.7~5.5 4.0~5.0
3
Elongation
%
Dry
Wet
25~50
25~60
25~30
25~50
5.0~7.0
5.5~7.5
25~60
27~63
20~50
20~50
4 Young's Modulus (kg/mm2) 400~850 130~300 950~1300 80~300 310~870
5 Moisture Regain (%)
(At 20ºC, 65% RH)
1.2~2.0 16 7 3.5~5.0 0.4~0.5
6 Specific Gravity 1.17 1.32 1.54 1.14 1.38

Transition Temperature

The second order transition temperature of Varlan acrylic fibre is 70~80ºC in water & around 95~105ºC in dry condition.

Melting Point

Varlan has no definite melting point. However, it decomposes before melting. A softening phase at about 220~240ºC occurs before the char point of the fibre is reached.

Boiling Shrinkage

Fiber Shrinkage (%)   
        Normal shrinkage 21+/-1  
        High shrinkage 25+/-1  

Moisture Regain

Varlan has a low moisture regain, its commercial value being 1.5~2.0% under standard conditions of temperature and humidity.

Chemical Properties

Against acids, slight decrease in strength is observed at 0.5-1.0% concentration at 100ºC.
Against organic solvents, strength is unaffected at ordinary temperature.
Varlan is slightly affected by oxidizing agents.
Varlan is insoluble in general solvents but is soluble in following solvents; Dimethyl formamide, Dimethyl sulphoxide (DMSO), Dimethyl acetamide (DMA), Ethylene carbonate, Saturated Zinc chloride solution etc.

Resistance to Sunlight

Varlan possesses high resistance to weathering and to sunlight. Even after extended exposure, it shows a negligible deterioration in its mechanical properties without suffering the yellowing and fading typical of other fibres.

Microbial Resistance

Varlan is highly resistant to action of Moth and Mildew.

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