| 摘要 |
The present invention discloses a heat-resistant nonwoven fabric comprising a layer having heat resistance property and a layer having anti-oxidative property, wherein the heat-resistant nonwoven fabric has a puncture strength of 0.5 N or more after heat treatment at 250° C. for 50 hours; and a position of an absorption band (A) showing a maximum infrared absorbance in the region of 500 cm−1 to 3000 cm−1 of the layer having an anti-oxidative property does not change before and after applying a voltage of 2.7V for 72 hours, and an absolute value of a rate of change ((C−D)/C) is less than 25%, wherein (C) is a ratio of an absorbance at the absorption band (A) before applying the voltage to an absorbance at a wave number (B) before applying the voltage, and (D) is a ratio of an absorbance at the absorption band (A) after applying the voltage to an absorbance at a wave number (B) after applying the voltage, wherein the wave number (B) is a wave number of independent absorption peaks other than an absorption peak branched from the absorption band (A) or a shoulder peak, successively selected from a wave number of an independent absorption peak having a larger absorbance among the group of said independent absorption peaks.
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