Side curtain airbag and airbag system comprising the same

摘要

Disclosed is a side curtain airbag and an airbag system including the same. The side curtain airbag according to the present invention comprises an inflating part having gas inflation, a non-inflating part supporting the inflating part, and an adhered part constituting a boundary between the inflating part and the non-inflating part. The adhered part is coated with a seam sealant and sewed. The initial maximum pressure of the inflating part is 40 kPa or more when injecting a gas therein with an instant pressure of at least 10 bar, and the pressure after 6 seconds is 25 kPa or more. The side curtain airbag may optimize to apply the method of seam sealant coating and sewing on the adhered part constituting a boundary between the inflating part and the non-inflating part. Thus, it can keep the internal gas pressure of the airbag to the extent of protecting passengers safely at rollover.

主权项

1. A side curtain airbag comprising:
an inflating part having gas inflation; a non-inflating part supporting the inflating part; and an adhered part constituting a boundary between the inflating part and the non-inflating part, wherein the adhered part is coated with a seam sealant in the amount of 45 g/m2 to 110 g/m2 to have a thickness in range of 0.5 mm to 1.0 mm and a width in range of 8 mm to 10 mm, and sewed with a thread having 840 to 1260 deniers to have a stitch number in range of 40 stitches/100 mm to 50 stitches/100 mm, wherein the seam sealant is room temperature vulcanizable and is a two-component liquid and the seam sealant comprises a room temperature vulcanizable silicone resin, wherein the tensile strength of the seam sealant is at least 4 MPa, the elongation of the seam sealant is at least 1,000%, the viscosity of the seam sealant is 170,000 to 250,000 cps, the pot life of the seam sealant is 40 to 80 min, and the curing time of the seam sealant is 18 to 30 hr at room temperature, and wherein the initial maximum pressure of the inflating part is 40 kPa or more when injecting a gas therein with an instant pressure of at least 10 bar, and the pressure after 6 seconds is 25 kPa or more.