Fibre properties maximum temperature

Some of the more common fibres (and their general properties) whieh are used in industrial filtration are listed in Table 3.4. Note that the maximum operating temperatures shown in Table 3.4 are somewhat lower than in a previous table and reflect the influence of continuous exposure to aqueous conditions. However, in the absence of official published data, these should only be used as a general comparative guide. 

Property Fibre Tensile Modulus (GPa) Tensile Strength (GPa) Elongation at Break % Density p 3 g/cm Specific Modulus GPa/p Specific Strength GPa/p Maximum Working Temperature... 

Bryant and Colvin produced a fibre with integral microcapsules with PCMs or plastic crystals. The fibre has enhanced thermal properties at predetermined temperatures. The microcapsules can range in size from about 1 to about 10 microns. In fabricating the fibre, the desired microencapsulated PCMs are added to the liquid polymer, polymer solution or base material and the fibre is then expended according to conventional methods such as dry or wet spinning of the polymer solutions and extrusion of the polymer melts. According to the report, the maximum content of PCM in the polyacrylic fibre is about 10%. The minimum filament denier is 2.2dtex. ... 

It is difficult to be more precise without specific examples though the effects of some limiting conditions are evident if the structure must be electrically insulating carbon fibres are not suitable (see Chapter 7 for the electrical properties of carbon fibres) if fabrication must be carried out at room temperature a thermoplastic matrix could not be used while if maximum stiffness or minimum weight is vital, carbon or aramid fibres, respectively, would be employed. 

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