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Gas production drug for automobile safety belt pretensioner and preparation method of gas production drug

A technology of seat belt pretensioner and gas-generating agent, which is applied in the production of compressed gas, explosives, attack equipment, etc., can solve problems such as output performance degradation, and achieve the effects of improving stability, fewer processes, and simple process.

Inactive Publication Date: 2015-11-18
陕西庆华汽车安全系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the object of the present invention is to provide a gas-generating drug used in automobile seat belt pretensioners, which solves the "degradation" of the output performance of the existing gas-generating drug when the temperature changes The problem

Method used

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  • Gas production drug for automobile safety belt pretensioner and preparation method of gas production drug
  • Gas production drug for automobile safety belt pretensioner and preparation method of gas production drug
  • Gas production drug for automobile safety belt pretensioner and preparation method of gas production drug

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preparation example Construction

[0033] The present invention also provides the preparation method of the above-mentioned gas-generating medicine for the automobile seat belt pretensioner, comprising the following steps:

[0034] Weigh each component according to the above proportions, add combustible agent, binder, oxidant, combustion enhancer and solvent into the kneader to knead into a drug mass, and then use plunger extrusion to extrude the drug mass into a drug bar, and then the drug bar Dry and cut into medicine granules, sieve the medicine granules to remove damaged medicine granules and powder, obtain complete and uniform medicine granules, and finally dry to obtain gas producing medicine.

[0035] When kneading in a kneader, you can first add a binder and a solvent to knead for a period of time, then add a combustion aid, a combustible agent and an oxidant in sequence, and continue to knead into a drug group, such as figure 1 shown; it is also possible to knead the solvent and the oxidizing agent for...

Embodiment 1

[0045] The gas-generating drug in this example includes 55% of strontium nitrate, 36% of 5-aminotetrazole with an average particle size below 10 μm, 3% of ultrafine silicon powder with a particle size of less than 2 μm, and 6% of hydroxypropyl methylcellulose.

[0046] The preparation process of the gas-generating medicine is as follows: figure 1 Shown as:

[0047] Weigh 55% of strontium nitrate, 36% of 5-aminotetrazole with an average particle size below 10 μm, 3% of ultrafine silicon powder with a particle size of less than 2 μm, and 6% of hydroxypropyl methylcellulose. Strontium nitrate needs to be added with a certain amount of silicon dioxide for ball milling and sieving before use, so as to pretreat the irregular crystal shape and ensure the consistency of the material.

[0048] Step 1: Knead

[0049] Divide strontium nitrate and 5-aminotetrazole into two equal parts, first pour hydroxypropyl methylcellulose and solvent (volume ratio of alcohol to deionized water is 1:...

Embodiment 2

[0061] The gas-generating drug of this example includes 43% of strontium nitrate, 25% of potassium nitrate, 28% of 5-aminotetrazole with an average particle size below 10 μm, 0.5% of boron powder with a particle size of less than 2 μm, and 3.5% of methylcellulose.

[0062] The preparation process of the gas-generating medicine is as follows: figure 2 Shown as:

[0063] Weigh 43% of strontium nitrate, 25% of potassium nitrate, 31% of 5-aminotetrazole with an average particle size of less than 10 μm, 0.5% of boron powder with a particle size of less than 2 μm, and 3.5% of methylcellulose. Before use, strontium nitrate and potassium nitrate need to add a certain amount of silicon dioxide for ball milling and sieving treatment to pretreat the irregular crystal shape and ensure the consistency of the material.

[0064] Step 1: Knead

[0065] Add the weighed methyl cellulose, silicon powder, and 5-aminotetrazole into a V-type mixer and dry mix for more than 30 minutes. First add...

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Abstract

The invention discloses a gas production drug for an automobile safety belt pretensioner. The gas production drug consists of the following components in percentage by mass: 28-42% of a combustible agent, 3-10% of an adhesive, 43-68% of an oxidant and 0.5-5% of a combustion improver. The invention further discloses a preparation method of the gas production drug for the automobile safety belt pretensioner. The preparation method comprises the following steps: adding the combustible agent, the adhesive, the oxidant, the combustion improver and a solvent into a kneading machine to be kneaded into drug rolls, then extruding the drug rolls into drug strips by adopting plunger-type extrusion, airing the drug strips, cutting the aired drug strips into drug granules, screening the drug granules, removing the damaged drug granules and powder to obtain integrated and uniform drug granules, and finally drying so as to obtain the gas production drug. The composition of the gas production drug meets the requirement of gas production pressure of a mini-type gas generator, the output performance is stable, and the 'quality degradation' phenomenon is avoided.

Description

technical field [0001] The invention belongs to the technical field of automobile safety devices, and in particular relates to a gas-generating medicine used for an automobile safety belt pretensioner, and also relates to a preparation method of the above-mentioned gas-generating medicine used for an automobile safety belt pretensioner. Background technique [0002] The car seat belt pretensioner is one of the important components of the passive safety system. Its function is that when the car collides, the car ECU sends a pretensioner point signal, and the gas-producing medicine in the pretensioner goes through a fire transmission sequence. Ignite, high-pressure gas will be generated quickly after combustion, and the gas will work to retract and tighten the seat belt to reduce the winding gap and wearing gap, eliminate the influence of restraint empty travel, better "tie" the occupant on the seat, and avoid the occupant's head The back and chest hit the steering wheel, car ...

Claims

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Application Information

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IPC IPC(8): C06D5/00C06B33/04
Inventor 张冬孙卫升孟航徐磊王晓锋张致魁孙勇韩瑞民王燕丽张康熙田国江刘希
Owner 陕西庆华汽车安全系统有限公司
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