High density fabric for air bag and method for manufacturing high density fabric

   
   

There is provided a high density woven fabric wherein air permeability under 50 kPa differential pressure is 2.5 L/cm.sup.2 /min. or less, and air permeability index (50 kPa) calculated by the formula 1 is 1.2 or more. Air permeability index (50 kPa)=(Log (Q (55 kPa))-Log (Q (45 kPa)))/(Log 55-Log 45) (Formula 1) Air permeability under Q(55 kPa):55 kPa differential pressure is (1/cm.sup.2 /min.); and Air permeability under Q(45 kPa):45 kPa differential pressure is (1/cm.sup.2 /min.).

Se proporciona una tela tejida de alta densidad en donde la permeabilidad del aire bajo presión diferenciada del kPa 50 es 2.5 L/cm.sup.2 /min. o menos, y el índice de la permeabilidad del aire (kPa 50) calculado por el fórmula 1 es 1.2 o más. Ventile el índice de la permeabilidad (kPa)=(Log 50 (Q (kPa))-Registro 55 (Q (45 kPa)))/(Log 55-Log 45) (permeabilidad del aire del fórmula 1) bajo presión diferenciada del kPa de Q(55 kPa):55 es (1/cm.sup.2 /min.); y la permeabilidad del aire bajo presión diferenciada del kPa de Q(45 kPa):45 es (1/cm.sup.2 /min.).

 
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