Ignition powder for safety airbag gas generator and preparation method thereof

A gas generator and airbag technology, which is used in explosives processing equipment, explosives, offensive equipment, etc., can solve the problems of low production efficiency, combustion and explosion accidents, and low gas production, and achieve easy ignition and reduce combustion and explosion accidents. , the effect of high combustion temperature

CN108911936AInactive Publication Date: 2018-11-30锦州锦恒安全装置有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an ignition powder for a safety airbag gas generator and a preparation method thereof. The ignition powder comprises the following components in percent by mass: 10-40% of a first combustible agent, 1-20% of a second combustible agent, 1-20% of monatomic silicon powder, 34-65% of an oxidant and 1-10% of an adhesive. The preparation method comprises the following steps: weighing the above raw materials in percent by mass and fully mixing the raw materials, then adding water accounting for 10-18% of the total mass of the raw materials to perform a secondary uniform mixing; extruding the mixed raw materials with an extruder and pelletizing the extruded materials through a pelletizer; sieving the pelletized material particles and screening medicine particles with a diameter of 2.0 mm-4.0 mm and a length of 2 mm-5 mm as ignition agents; drying the sieving-qualified ignition agents in the air, and then performing drying in a drying box; and finally performing medicine-mixing and sieving to obtain the ignition powder product. The ignition powder is easy to ignite, low in ignition point, high in combustion temperature, strong in ignition ability, high in thermal andchemical stability and safe in production process.
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Description

technical field

[0001] The invention belongs to the technical field of automobile safety, and in particular relates to an ignition powder for a safety airbag gas generator and a production method thereof. Background technique

[0002] With the rapid development of my country's automobile industry, automobile safety technology has attracted much attention, and more and more automobiles are equipped with airbags. The airbag system is rapidly deployed through the action of gas to prevent the members from being hurt by the violent impact under the action of inertia. Due to the impact of the high-speed running of the car, the deployment time of the airbag is very short, usually between 30 and 50 milliseconds, and the airbag must be filled; therefore, the requirements for the ignition agent of the gas generator of the airbag system are extremely strict, and the gas generator must be ignited within 7 milliseconds. gas agent, and the gas produced should be harmless to humans. Airb...

Examples

preparation example Construction

[0034] The preparation method of the ignition powder of the above-mentioned safety airbag gas generator comprises the following steps:

[0035] (1) Weigh the following raw materials according to mass percentage and add them into the mixer to fully mix to form a uniform mixture, then add 10% to 18% of the total weight of the materials for secondary mixing;

[0036] 10-40% of the first combustible agent, 1-20% of the second combustible agent, 1-20% of elemental silicon powder, 34-65% of oxidant content, and 1-10% of binder;

[0037] (2) Extrude the mixed material with an extruder. The opening diameter of the extrusion die of the extruder is 2.0mm to 4.0mm; The length is 2mm~5mm;

[0038] (3) Sieve the cut material particles, and screen the particles with a diameter of 2.0mm to 4.0mm and a length of 2mm to 5mm as the ignition agent;

[0039] (4) Drying the igniting agent qualified for screening;

[0040] (5) Put the dried igniting agent into a drying box for drying at a drying...

Embodiment 1

[0043] An ignition powder for a gas generator for an airbag according to the present invention comprises the following components: 25kg of a first combustible agent, 20kg of a second combustible agent, 2kg of elemental silicon powder, 49kg of an oxidizing agent, and 4kg of a binder. Wherein the first combustible agent is nitroguanidine, and the second combustible agent is pentaaminotetrazole.

[0044] The particle size D50 of the first combustible agent is ≤ 10 μm, and the particle size D50 of the second combustible agent is ≤ 10 μm. The particle size D50 of the elemental silicon powder is ≤10 μm.

[0045] The oxidant is potassium nitrate with a particle size of ≤80 mesh; the binder is sodium carboxymethyl cellulose with a particle size of ≤200 mesh.

[0046] The preparation method of the ignition powder of the above-mentioned safety airbag gas generator comprises the following steps:

[0047] (1) After the following raw materials are weighed, add in the mixer and fully mix ...

Embodiment 2

[0059] The igniter of an airbag gas generator related to the present invention comprises the following components: 10 kg of the first combustible agent, 1 kg of the second combustible agent, 20 kg of elemental silicon powder, 63 kg of oxidizing agent, and 6 kg of binder; wherein the first combustible agent It is guanidine nitrate, and the second combustible agent is pentaaminotetrazole.

[0060] The particle size D50 of the first combustible agent is ≤ 10 μm, and the particle size D50 of the second combustible agent is ≤ 10 μm. The particle size D50 of the elemental silicon powder is ≤10 μm.

[0061] The oxidant is sodium nitrate with a particle size of ≤80 mesh. The binder is hydroxypropyl methylcellulose with a particle size of ≤200 mesh.

[0062] The preparation method of the ignition powder of the above-mentioned safety airbag gas generator comprises the following steps:

[0063] (1) After the following raw materials are weighed in proportion, add in the mixer and fully...