Hoechst Aktiengesellschaft

Jutta Cardinal

Werner Bruckner

Cynthia Bennett

Karl Heinrich

Richard Neuert

Friedrich Herold

Holger Jung

Gunther Bauer

Gunther Keil

Fibers having a tenacity of more than 80 cn/tex and a filament linear density of more than 8 dtex which contain as the fiber-forming material an aromatic polyamide which is soluble in organic solvents and spinnable from isotropic spinning solutions. The fibers can be used for example as reinforcing materials, as heat-resistant insulator materials, for producing filter fabrics or as insulating materials.

Aramid fibers of high strength and high linear density, production

A film made from aromatic copolyamides of the dicarboxylic acid diamine type, whose shaping substance comprises certain recurring structural units and which has specific criteria regarding Staudinger index, tear strength, volume resistance, electrical dielectric strength, dimensional stability and water absorption, a process for its production, and the use of the film for the production of heat-resistant insulation material or as a substrate for flexible circuit boards.

Film of aromatic copolyamide from bis(aminophenoxy) benzene

Object of the invention is a voluminous filament yarn of three-dimensionally curled filaments without loops, coils or whorls having a positive value of residual crimp c.sub.3, with several loose filament ends sticking out and at least said ends having a flex abrasion resistance of less than about 1500 cycles. The obtained yarn excels in the uniformity of its characteristics all over the yarn length, its high crimp elongation and recovery from stretch and can be worked up to fabrics having an extremely low tendency to pilling.

Voluminous filament yarn

Growing community of inventors

Kriftel, Germany

Jutta Cardinal