Toyoda Gosei Co., Ltd.

Motoaki Naruse

Satoshi Mabuchi

Hiroyuki Kobayashi

Eiji Sato

Masamichi Kajiro

Toshinori Tanase

Toru Koyama

Koki Tanaka

Takanori Kanto

Atsushi Kashio

Hajime Miwa

Yuh Kimura

A polyvinyl alcohol (PVA)-based airbag base fabric aqueous coating material is described. A blocked polyisocyanate component (B-NCO) and liquid polyol are added to polyvinyl alcohol as a cross-linkage improver and a plasticizer, respectively. The B-NCO is composed of or based on a medium-molecular-weight form as a polyether-modified prepolymer, and used concurrently with a low-molecular-weight form in a small amount. The base fabric coating material is applied on one or both of the sides of a cloth of the base fabric and heated. The acquired coating film is a water-insoluble coat and the coating has excellent heat and moisture resistance (hot water resistance) and flexibility.

Airbag base fabric coating material, airbag base fabric, and method for manufacturing the same

An airbag includes a body cloth made of polyamide woven fabric and constituting a circumferential wall of the airbag. The body cloth includes on the inner surface a bond area having a coating layer of polyamide elastomer and to which a supplementary cloth made of polyamide woven fabric is bonded, an extended area having a same coating layer of polyamide elastomer as on the bond area, and an uncoated area that has no coating layer. The coating layer on the bond area is used as heat sealable adhesive that adheres the supplementary cloth to the body cloth whereas that on the extend area is arranged in such a manner as to be exposed to inflation gas upon airbag inflation so as to act as a protective membrane for preventing gas leakage.

Airbag

An airbag includes on an area of a circumferential wall encircling mounting holes a reinforced area that has a laminated structure of base cloths, i.e. a body cloth and a plurality of reinforcing cloths overlaid on the body cloth. Each of the base cloths has an adhesive layer on one surface and, the reinforced area includes in between the base cloths an adhesion area that bonds the base cloths together by heat sealing. The adhesion area is formed between two of the base cloths immediately adjoining each other or between two of the base cloths that has at least one other base cloth placed in between and at an area of the other base cloth where there is no cloth. All the base cloths are bonded together by the adhesion area without slippage from one another in a direction orthogonal to a layering direction of the base cloths.

A side airbag apparatus for vehicle has an airbag and an inflator. An upper chamber, a lower chamber, and an intermediate chamber are defined by a seam in the airbag. When the airbag is deployed, the upper chamber corresponds to a shoulder of an occupant, the lower chamber corresponds to a lumbar region of the occupant, and the intermediate chamber corresponds to a thorax of the occupant. The seam guides gas from the inflator to the upper and lower chambers such that the upper and lower chambers are substantially simultaneously inflated, and the intermediate chamber is inflated after a delay. The thickness of the intermediate chamber is less than the thicknesses of the upper and lower chambers. As a result, the occupant of the vehicle is effectively protected.

Side airbag apparatus

A rear seat side airbag device includes a cover, a case that is attached to a back side of the cover and a comb teeth-like holding member and is formed by assembling these constituent components together. A breakable portion is formed at a position on the cover which corresponds to the case. In this breakable portion, a first thin portion, which constitutes a breakage initiating position, is formed so as to extend in a vertical direction along a corner portion on a side of the cover which faces a rear seat. In addition, to correspond to the position of the first thin portion, the case is provided such that a first side wall on which a plurality of fragile portions are formed is positioned on a side thereof which faces the rear seat and a second side wall on which a rigid portion is provided is positioned on a side thereof which faces a door trim.

Rear seat side airbag device

An airbag apparatus according to the present invention includes a gas generator and an airbag. The airbag includes a panel sheet and a recess defined inwardly with respect to the airbag. The airbag is formed in a bag-like shape by folding the panel sheet in two and sewing the circumference of the panel sheet. The panel sheet has a first folding line and an inward folding portion including a line extending from the first folding line and arranged in a circumferential portion of the panel sheet. The inward folding portion includes a second folding line by which the inward folding portion is defined, a third folding line extending along the line extending from the first folding line, and an insertion opening through which the gas generator is inserted into the airbag. The recess is provided by folding the inward folding portion along the second folding line inwardly with respect to the airbag, re-folding the airbag in two along the third folding line, and sewing the circumference of the inward folding portion together with the circumference of the panel sheet.

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Aichi-ken, Japan

Motoaki Naruse