1. An airbag base fabric having a warp direction energy
absorption characteristic defined by the below formula (1) is 30 to 50
5 and a weft direction energy absorption characteristic defined by the
below formula (2) is 30 to 50. (Formula(1))
Warp Direction Energy Absorption Characteristic = Warp Direction Energy Absorption Amount/Warp Yarn Cover Factor
10 (In the formula (1), the warp direction energy absorption amount is a
value of the integral of stress applied, in measurement of the warp direction tensile strength and elongation at break, from the start of the measurement until the sample breaks.) (Formula (2))
15 Weft Direction Energy Absorption Characteristic = Weft
Direction Energy Absorption Amount/Weft Yarn Cover Factor (In the formula (2), the weft direction energy absorption amount is a value of the integral of stress applied, in measurement of the weft direction tensile strength and elongation at break, from the start of the
20 measurement until the sample breaks.)
2. The airbag base fabric of claim 1, wherein a warp yarn
and a weft yarn forming the airbag base fabric are synthetic
multifilament yarn, and the both has
25 a total fineness of 145 to 720 dtex,
a single filament fineness of 2 to 10 dtex, a tenacity of 4.5 to 6.5 cN/dtex, and

a elongation at break of 23 to 45%.
3. The airbag base fabric of claim 1 or 2, wherein the
average of the warp direction elongation at break and the weft direction
5 elongation at break is 35 to 55%.
4. The airbag base fabric of any one of claims 1 to 3,
wherein the sum of the warp yarn cover factor and the weft yarn cover
factor is 1900 to 2400.
10
5. The airbag base fabric of any one of claims 1 to 4,
wherein the average of the warp direction elongation at break and the
weft direction elongation at break is 44 to 50%, and single filament
fineness of the warp yarn and the weft yarn forming the airbag base
15 fabric are both 3 to 7 dtex.
6. An airbag, wherein the airbag base fabric of any one of
claims 1 to 5 is sewn.
20 7. The airbag of claim 6 used as a side airbag.
8. A method of manufacturing the airbag base fabric of any one of claims of 1 to 5, comprising
a scouring process for scouring a woven gray fabric by applying a
25 tension of 150 to 400 N/m with water at 70°C or less,
a drying process for drying the gray fabric at a temperature of 140°C or less, and

a heat-setting process for heat-setting the woven gray fabric,
wherein the heat-setting process is a process in which tentering is
performed, by using a pin stenter dryer, to obtain a base fabric width
more than 98% of a width of the gray fabric dried by a dryer, with an
5 overfeed ratio of -2 to +2%, at a temperature of 120 to 200°C.