JPH03109151A - Gas generating device for protecting bag - Google Patents

Gas generating device for protecting bag

Info

Publication number
JPH03109151A
JPH03109151A JP1246346A JP24634689A JPH03109151A JP H03109151 A JPH03109151 A JP H03109151A JP 1246346 A JP1246346 A JP 1246346A JP 24634689 A JP24634689 A JP 24634689A JP H03109151 A JPH03109151 A JP H03109151A
Authority
JP
Japan
Prior art keywords
gas generating
gas
composition
shape
generating compound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1246346A
Other languages
Japanese (ja)
Inventor
Noriaki Nakajima
中島 紀昭
Kunihiko Ishii
邦彦 石井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP1246346A priority Critical patent/JPH03109151A/en
Publication of JPH03109151A publication Critical patent/JPH03109151A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent the chemical change of a gas generating compound and improve the shape stability by forming the gas generating compound accommodated inside a gas generating chamber into a shaped body which has a prescribed shape and is sealing-enclosed in a gas-free state. CONSTITUTION:In the vehicle such as an automobile in order to protect a passenger in the collision of the vehicle, a gas bag 1 is expanded by a gas generator 2 to support the passenger's body, which shifts inertially, through shock- absorbing. In this case, in the gas generator 2, a gas generating chamber 5 is arranged through a porous plate 3 and a metal screen 4 inside the gas bag 1, and a gas generating compound 6 and an ignitor 7 are accommodated inside the gas generating chamber 5. The gas generating compound 6 is formed of a shaped body which is sealing-enclosed in a gas-free state, having a prescribed shape. The chemical change of the gas generating compound 6 is prevented, and the stability of the shape is improved, and the prescribed performance is maintained for a long period.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、安定なガス発生組成物成形体を内蔵した保護
バッグ用ガス発生装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a gas generating device for a protective bag incorporating a molded article of a stable gas generating composition.

[従来の技術] 自動車等車輌搭乗者の保訛システムとして、ガスによっ
て彫版させられる袋体にガス発生装置を組み合わせた保
護バッグ装置が使用される。
[Prior Art] As an accent protection system for passengers of vehicles such as automobiles, a protective bag device is used in which a gas generating device is combined with a gas-engraved bag.

ガス発生装置は、ガス発生剤を収納したガス発生室と化
学反応により発生した遊離窒素の温度の降温手段とより
なり、その諸態様例は特公昭51−48339号、特公
昭55−152693号、LISP3,904.221
号などにより公知である。
The gas generating device consists of a gas generating chamber containing a gas generating agent and a means for lowering the temperature of free nitrogen generated by a chemical reaction. LISP3,904.221
It is known by the number etc.

ガス発生装置に用いられるガス発生剤はアルカリ金属乃
至アルカリ土類金属のアジド、または金属の窒化物など
の金属と窒素とからなる無機化合物とこれと反応して窒
素ガスを遊離せしめる金属と酸素、硫黄の化合物、硝酸
、塩素酸、過塩素酸の金属塩などのいわゆる一般的に酸
化剤といわれる無機化合物とを主たる成分とする粉体組
成物である。そして、これらガス発生剤は、自動車の衝
突時急激におこる減速に感応して瞬時に着火せしめられ
数十ミリ秒の間に所定量の窒素ガスを発生する。その組
成例が特公昭53−229411号、特公昭57−29
440号、特公昭53−13596号、特公昭57−1
3L85号、USP4,203.787号、特公昭53
−2156号、特公昭5B−20920号、特開平1−
122986号、特開平1−122987号等において
、多数の公知例が紹介されている。実用のガス発生組成
物の設計は極めて信頼性の高いことが要求され、しかも
信頼性は約10年あるいはそれを越えて使用される自動
車の安全保護装置であることもあって、長期にわたって
保障されるものでなければならない。ガス発生組成物は
、粉体のままあるいは顆粒、ペレット状でガス発生室に
収容されている組成物であるから、反応は不均一系の反
応であり、その反応速度は組成成分の化学変化および粉
体の物理形態などの不均一性によって著しく支配される
。そこでガス発生剤組成物は、著しく長期の間その化学
的性質および物理的形状および集合状態が当初の設定状
態を維持するようにガス発生室内に収容されなければな
らない。
The gas generating agent used in the gas generating device is an inorganic compound consisting of a metal and nitrogen, such as an azide of an alkali metal or alkaline earth metal, or a metal nitride, and a metal and oxygen that react with this to liberate nitrogen gas. It is a powder composition whose main components are sulfur compounds and inorganic compounds commonly referred to as oxidizing agents, such as metal salts of nitric acid, chloric acid, and perchloric acid. These gas generating agents are instantly ignited in response to the rapid deceleration that occurs during a collision of an automobile, and generate a predetermined amount of nitrogen gas within several tens of milliseconds. Examples of its composition are JP-B No. 53-229411 and JP-B No. 57-29.
440, Special Publication No. 53-13596, Special Publication No. 57-1
No. 3L85, USP No. 4,203.787, Special Publication No. 1973
-2156, Japanese Patent Publication No. 5B-20920, Japanese Patent Publication No. 1999-
A large number of known examples are introduced in No. 122986, Japanese Unexamined Patent Publication No. 1-122987, etc. The design of a practical gas generating composition is required to be extremely reliable, and reliability is guaranteed over a long period of time as it is an automobile safety protection device that will be used for about 10 years or more. It must be Since the gas generating composition is contained in a gas generating chamber in the form of powder, granules, or pellets, the reaction is a heterogeneous reaction, and the reaction rate depends on chemical changes in the composition components and It is significantly dominated by heterogeneity such as the physical form of the powder. Therefore, the gas generant composition must be contained within the gas generation chamber such that its chemical properties and physical shape and state of assembly remain as originally set for a significant period of time.

[発明が解決しようとする課題] しかるに、ガス発生剤組成物は、一般に大気中の酸素、
水蒸気、二酸化炭素の影響を受は化学的にその反応性が
変化しやすいばかりでなく、また振動下において粉化し
やすい。本発明者らは、均一な顆粒、ペレットに成形し
た組成物は、振動により相隣する顆粒、ペレットと接触
して外縁部から破壊し、不均一なサイズと形状の混合さ
れたものとなりやすく、これが反応速度のバラツキ原因
になることを知った。
[Problems to be Solved by the Invention] However, gas generating agent compositions generally contain atmospheric oxygen,
When exposed to the influence of water vapor and carbon dioxide, not only its reactivity tends to change chemically, but it also tends to turn into powder under vibration. The present inventors found that a composition formed into uniform granules or pellets is likely to come into contact with adjacent granules or pellets due to vibration and be destroyed from the outer edge, resulting in a mixture of non-uniform sizes and shapes. I learned that this causes variation in reaction speed.

本発明は、こうした状況の下に、ガス発生室に収納され
るガス発生組成物が化学的に変化せず、かつ振動により
形状変化を起こすこともなく、したがって、製造初期の
諸性能を長期間にわたって、安定して維持することがで
きる保護バッグ用ガス発生装置を提供することを目的と
するものである。
Under these circumstances, the present invention aims to ensure that the gas generating composition stored in the gas generating chamber does not change chemically and does not change its shape due to vibration, and therefore maintains various performances at the initial stage of manufacture for a long period of time. It is an object of the present invention to provide a gas generator for a protective bag that can be stably maintained over a long period of time.

[課題を解決するための手段] 本発明者らは、鋭意検討した結果、前述の問題は、ガス
発生組成物を所定形状に締め固めガスフリー雰囲気に密
封包装してガス発生室内に収納することにより解決しう
ることを見出だした。
[Means for Solving the Problems] As a result of intensive studies, the present inventors have found that the above-mentioned problem can be solved by compacting the gas generating composition into a predetermined shape, sealing the package in a gas-free atmosphere, and storing it in the gas generating chamber. I found that this can be solved by.

すなわち、本発明は、少なくともガス発生室、および該
室内に収納されたガス発生組成物から構成される保護バ
ッグ用ガス発生装置において、前記ガス発生組成物が、
所定形状にガスフリーの状態に密封包装された成形体で
ある保護バッグ用ガス発生装置である。
That is, the present invention provides a gas generating device for a protective bag comprising at least a gas generating chamber and a gas generating composition stored in the chamber, wherein the gas generating composition is
This is a gas generator for a protective bag, which is a molded body sealed and packaged in a gas-free state in a predetermined shape.

本発明によって、ガス発生組成物の化学成分の変質を生
じることがなく、また組成物形状形態が変化することも
ないから、ガス発生装置作動時の窒素放出反応速度を長
期間にわたり設計どおり維持することができるので、性
能の低下を見込んで予めこの低下分を補填しておく必要
もなく、収納容積を最小化することができ、又包装体と
したために取扱が容易となり装填操作作業性を効率−化
することもできる。
According to the present invention, the chemical components of the gas generating composition do not change in quality, and the shape of the composition does not change, so the nitrogen release reaction rate during operation of the gas generator can be maintained as designed for a long period of time. This eliminates the need to anticipate a decline in performance and compensate for this decline in advance, minimizing the storage volume.In addition, since it is packaged, it is easy to handle, making loading operations more efficient. - can also be converted into

本発明においてガス発生室に収納されるガス発生組成物
は、金属箔、合成樹脂膜、金属箔と合成樹脂膜のラミネ
ート膜等で実質的にガスフリーの状態で密封包装された
ものでなければならない。
In the present invention, the gas generating composition stored in the gas generating chamber must be hermetically packaged in a substantially gas-free state using metal foil, synthetic resin film, laminate film of metal foil and synthetic resin film, etc. No.

ガス発生組成物は粉体もしくは顆粒を直接−体に真空包
装法を適用して大気圧の圧縮作用により所定形状に締め
固め密封包装するか(第4図)、公知の打錠機で所定形
状に締め固めた後、前記箔もしくは合成樹脂膜で包み真
空包装法を適用して密封包装することも出来る(第3図
)。
The gas-generating composition can be prepared by directly applying a vacuum packaging method to the powder or granules and compacting them into a predetermined shape by the compression action of atmospheric pressure (Fig. 4), or by compressing them into a predetermined shape using a known tableting machine. After being compacted, it can be wrapped in the foil or synthetic resin membrane and sealed in a vacuum packaging method (Figure 3).

あるいは打錠機により形成された成形要素毎に密封包装
してもよい(第2図)。密封包装に用いられる金属箔、
合成樹脂膜などは厚さ数μm〜数十μmの素材が用いら
れる。合成樹脂膜に熱により収縮する性質の素材を用い
ることによって、締め固め効果、形状保持効果を高める
ことができる。真空包装法の適用にあたって、膜材料で
形成した袋内を窒素ガスで置換または充満して真空ポン
プで吸引しヒートシール法を適用する方法が好適である
Alternatively, each molded element formed by a tablet press may be sealed and packaged (FIG. 2). Metal foil used for sealed packaging,
For the synthetic resin film, a material having a thickness of several μm to several tens of μm is used. By using a material that shrinks due to heat for the synthetic resin film, the compaction effect and shape retention effect can be enhanced. When applying the vacuum packaging method, it is preferable to use a method in which the inside of a bag formed of a membrane material is replaced or filled with nitrogen gas and suctioned with a vacuum pump to apply a heat sealing method.

第1図は、ガス発生装置の一態様を示すが、ガス発生室
内にガス発生組成物を締め固めた密封包装したペレット
を積層し収納した態様を示す。この例は、着火装置をガ
ス発生室内に設けたものである。ガス発生組成物は、ガ
ス発生室の空間全体を占める一体の密封包装体であって
もよい。この場合、ガス発生組成物は、粉体、顆粒、あ
るいは小ベレットを所定量まとめ密封包装体に形成して
収納されてもよい。
FIG. 1 shows one embodiment of the gas generating device, in which hermetically sealed pellets containing compacted gas generating compositions are stacked and housed in a gas generating chamber. In this example, the ignition device is provided inside the gas generation chamber. The gas generating composition may be a one-piece sealed package that occupies the entire space of the gas generating chamber. In this case, the gas generating composition may be stored in a predetermined amount of powder, granules, or small pellets in a sealed package.

所定形状の密封包装体内部の組成物は、大気圧より減圧
状態にあるので、膜、箔により恒常的に締めつけられ充
填度が高められ、相互の移動が妨げられ、振動、摩擦に
よる形状の崩壊が抑制される。本発明でいう組成物がガ
スフリーとは、換言すればガス発生組成物が減圧下で密
封包装されていることを意味する。減圧の程度は、大気
圧の締め固め効果が認められる程度を上限とし可能なか
ぎり低圧であることが望ましい。概ね300Torr好
ましくは100Torr以下(室温下)が好適である。
Since the composition inside the sealed package with a predetermined shape is under pressure lower than atmospheric pressure, it is constantly tightened by the membrane and foil, increasing the degree of filling, preventing mutual movement, and preventing the shape from collapsing due to vibration and friction. is suppressed. In other words, when the composition of the present invention is gas-free, it means that the gas-generating composition is hermetically packaged under reduced pressure. The degree of pressure reduction is preferably as low as possible, with the upper limit being the degree at which the compaction effect of atmospheric pressure is recognized. Approximately 300 Torr, preferably 100 Torr or less (at room temperature) is suitable.

[実施例] 以下に実施例を挙げて本発明をさらに詳細に説明する。[Example] The present invention will be explained in more detail with reference to Examples below.

実施例1 ナトリウムアジド(N a Ns ) 72.3重量%
、K CI O412,8mm%及びCu O(14,
9重量%)の各粉末を用い全組成混合物100重量部に
対しトルエン80部を加え混合し、風乾後さらに加温し
てトルエンを除去した。この混合物を30メツシユ(タ
イラー)のステンレス金網上に置き、ゴムへらを用いて
金網の網目から押圧により押出した組成物を、60℃の
熱風乾燥機で乾燥し顆粒品を得た。
Example 1 Sodium azide (N a Ns ) 72.3% by weight
, K CI O412, 8 mm% and Cu O (14,
9% by weight) of each powder, 80 parts of toluene was added to 100 parts by weight of the total composition mixture, and the mixture was air-dried and further heated to remove toluene. This mixture was placed on a 30-mesh (Tyler) stainless steel wire mesh, and the composition was extruded through the mesh of the wire mesh by pressure using a rubber spatula and dried in a hot air dryer at 60° C. to obtain granules.

この顆粒状組成物を畑鉄工所製ロータリー式打錠機で直
径6.3mm 、厚さ2.41の両面に丸味をつけた0
、1g/個の円板状のペレット(第2図参照)に成形し
た。
This granular composition was rounded on both sides using a rotary tablet press made by Hata Tekkosho, with a diameter of 6.3 mm and a thickness of 2.41 mm.
, and molded into disc-shaped pellets (see Figure 2) weighing 1 g/piece.

コノベレット800個(合計80g)をガスバリヤ−製
のポリ塩化ビニリデンフィルム(厚さ75μm1旭化成
製サランフイルム)袋内に投入し、窒素置換し、真空ポ
ンプで吸引し、ヒートシール法により密封し、はぼ円柱
状の密封包装体を得た。
800 Conobelettes (total 80 g) were placed in a polyvinylidene chloride film bag made by Gas Barrier (thickness 75 μm, 1 Saran film made by Asahi Kasei), replaced with nitrogen, suctioned with a vacuum pump, sealed by heat sealing method, and then A cylindrical sealed package was obtained.

この密封包装体および密封包装してない裸のペレット 
800個をそれぞれ同容積形状のアルミニウム円筒内に
装入し、ゴム製キャップでアルミニウム円筒内容物が動
かぬよう固定し、周波数25Hz、加速度速度5Gの振
動を107回加えた後、粉化状態を1l)J定した。そ
の結果、密封包装組成物の粉化は1%に止どまっていた
のに対して、裸のペレットのそれは15%にも達してい
た。
This hermetically sealed package and the bare pellets that are not hermetically packaged
800 pieces were placed in aluminum cylinders with the same volume and shape, and the contents of the aluminum cylinders were fixed with rubber caps so that they would not move. After applying vibrations 107 times at a frequency of 25Hz and an acceleration rate of 5G, the powdered state was determined. 1l) J was determined. As a result, the pulverization of the sealed packaged composition remained at 1%, while that of the bare pellets reached as much as 15%.

粉化しない前のペレットと顆粒(平均直径l■)の燃焼
(分解)速度は、圧力10kg/ci下でそれぞれ60
m5ec 、 25■secであったが、ベレ・ソトが
粉化後は容器圧力が25kg/c−になり、燃焼時間は
各々3718% 10■Sとなり、ガス発生装置の窒素
ガス発生速度が設計速度と著しく異なってしまう。
The combustion (decomposition) rate of pellets and granules (average diameter l) before pulverization is 60% at a pressure of 10 kg/ci, respectively.
m5ec and 25 sec, but after Bere Soto is pulverized, the container pressure becomes 25 kg/c-, the combustion time becomes 3718% 10 sec, and the nitrogen gas generation rate of the gas generator becomes the design speed. will be significantly different.

実施例2 密封包装材料をポリ塩化ビニリデンフィルムに代って、
ナイロン膜コーティング(厚さ15μm)されたアルミ
箔(厚さ 9μ−)を用いた他は実施例1に準じて行い
、同様の結果を得た。
Example 2 The sealed packaging material was replaced with polyvinylidene chloride film,
The procedure of Example 1 was followed except that aluminum foil (thickness: 9 μm) coated with a nylon film (thickness: 15 μm) was used, and similar results were obtained.

[発明の効果] 以上説明したように、本発明の構成による保護バック用
ガス発生装置は、密封包装体としたことにより、該組成
物の化学的変化を防止することができ、さらに形状の安
定性も著しく向上し、振動下にあってもその粉化を抑制
することができる。したがって、長期に亘って設計どお
りの性能を維持することが可能となり、このガス発生装
置を用いて信頼性の極めて高い車輌安全装置を実現する
ことができる。
[Effects of the Invention] As explained above, the gas generator for a protective bag according to the present invention is made into a sealed package, so that chemical changes in the composition can be prevented and the shape can be stabilized. The properties are also significantly improved, and powdering can be suppressed even under vibration. Therefore, it is possible to maintain the performance as designed for a long period of time, and by using this gas generator, it is possible to realize an extremely reliable vehicle safety device.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の保護バック用ガス発生装置の一例を説
明する概略図。第2〜3図は本発明に使用するガス発生
組成物の密封包装体の態様を説明する図で、第2図はベ
レット自体を密封包装した物、第3図は多数のペレット
を密封包装したもの、第4図は粉体状の組成物を密封包
装したもの
FIG. 1 is a schematic diagram illustrating an example of a gas generator for a protective bag according to the present invention. Figures 2 and 3 are diagrams illustrating the embodiments of the sealed package of the gas generating composition used in the present invention. Figure 2 shows the pellet itself sealed and Figure 3 shows a sealed package of a large number of pellets. Figure 4 shows a powdered composition in a sealed package.

Claims (1)

【特許請求の範囲】[Claims] 少なくともガス発生室、および該室内に収納されたガス
発生組成物から構成される保護バッグ用ガス発生装置に
おいて、前記ガス発生組成物が、所定形状にガスフリー
の状態に密封包装された成形体であることを特徴とする
保護バッグ用ガス発生装置。
A gas generating device for a protective bag comprising at least a gas generating chamber and a gas generating composition stored in the chamber, wherein the gas generating composition is a molded article hermetically packaged in a predetermined shape in a gas-free state. A gas generator for a protective bag, characterized in that:
JP1246346A 1989-09-25 1989-09-25 Gas generating device for protecting bag Pending JPH03109151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1246346A JPH03109151A (en) 1989-09-25 1989-09-25 Gas generating device for protecting bag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1246346A JPH03109151A (en) 1989-09-25 1989-09-25 Gas generating device for protecting bag

Publications (1)

Publication Number Publication Date
JPH03109151A true JPH03109151A (en) 1991-05-09

Family

ID=17147194

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1246346A Pending JPH03109151A (en) 1989-09-25 1989-09-25 Gas generating device for protecting bag

Country Status (1)

Country Link
JP (1) JPH03109151A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0848205A (en) * 1994-07-12 1996-02-20 Morton Internatl Inc Pyrotechnic inflater for air bag
JP2013216014A (en) * 2012-04-10 2013-10-24 Mitsubishi Chemicals Corp Polycarbonate resin pellet package

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0848205A (en) * 1994-07-12 1996-02-20 Morton Internatl Inc Pyrotechnic inflater for air bag
JP2013216014A (en) * 2012-04-10 2013-10-24 Mitsubishi Chemicals Corp Polycarbonate resin pellet package

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