| abstract |
For the production of a flame-retardant, high-temperature resistant, paper-like material based on polyimide fibers of the general formula which material has a basis weight between 20 and 1,100 g / m², a LOI value of at least 32% O₂ and a Tg point of at least 300 ° C, a pulp consisting of an aqueous suspension of polyimide fibers and, if desired, polyimide fibrids with structural units of the general Formula (I) is processed on a paper machine to form a fleece and this is dewatered and dried, the polyimide fibers being comminuted, etc. with a fiber length of 0.01 to 120 mm, can be used for fleece formation.n n n Paper-like materials according to the invention with a basis weight between 60 and 290 g / m 2 can be produced by bringing a manageable sheet made of polyimide fibers into contact with a polyimide solution, drying them and optionally compressing them. |