DUCK FABRIC Russian patent published in 1994 - IPC

FIELD: parachute equipment. SUBSTANCE: calendered fabric is made from polyamide complex weft and warp threads. Results of investigations allowed sizeless parameter Hprov

, such as overall filling coefficient characterizing texture of fabric as far as air-permeability is concerned, to be obtained. Dependence of overall filling coefficient on parameters of fabric made from complex threads is recited in Specification in formula of invention. When value Hprоv of overall filling coefficient is at least 8.0, air-permeability of fabric not exceeding 20 dm³/m²c is provided. EFFECT: high quality of fabric and increased efficiency by wider operational capabilities. 3 dwg