FLAME RETARDANT, HIGH TEMPERATURE RESISTANT POLYIMIDE FIBRES

摘要

The invention relates to flame-retardant, hightemperature resistant polyimide fibres, a fleece made up of these fibres, and the fibres and moulded parts obtained after a heat treatment. The fibres according to the invention develop a shrinking force of from 0.3 to 1.1 cN, a fibre shrinkage of between 20 and 60% and form cohesive bonds after heating to a temperature above the glass transition range, of between 280 and 350.degree.C. From the fibres according to the invention it is possible to produce moulded parts of very high tensile strength, high heat resistance, flame-retardant properties and having a relatively low density.