Patent ID: 8360641

Claim:
An air bag, comprising: two inner sheets positioned to face each other; heat resistance material located at an inner side of the two inner sheets and applied to any one of the inner sheets in a length direction thereof; two outer sheets respectively located at an outer side of the two inner sheets; a second thermal bonding line for thermally bonding the inner sheets and the outer sheets along the heat resistance material; a first thermal bonding line for thermally bonding the two outer sheets with a gap from the second thermal bonding line to form an air input channel; and third thermal bonding lines extending from the second thermal bonding line in a direction opposite to the air input channel to form air pillars, wherein the heat resistance material is continuously formed over at least two of the air pillars, wherein an air injected through the air input channel is introduced into the air pillars between the two inner sheets, and the two inner sheets positioned in the air pillars are closely adhered and pressed to any one of the outer sheets by means of an inner pressure of the air pillars, wherein a plurality of first thermal bonding portions are formed in the air input channel in correspondence to the third thermal bonding lines, respectively, such that adjacent first thermal bonding portions are spaced apart from each other to form a first passage, and wherein a part of the first thermal bonding portions thermally bond the two outer sheets, and the other part of the first thermal bonding portions thermally bond the outer sheets to the inner sheets.