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Aerogenic composition of pretensioner of automobile safety belt and preparation method thereof

A technology of seat belt pretensioner and gas-generating composition, which is applied to the generation of compressed gas and attack equipment, and achieves the effects of good thermal stability, wide sources and low cost

Active Publication Date: 2010-09-08
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

According to conventional experience, the use of dry mixing has limitations, such as safety issues, dust control issues, etc.

Method used

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  • Aerogenic composition of pretensioner of automobile safety belt and preparation method thereof
  • Aerogenic composition of pretensioner of automobile safety belt and preparation method thereof
  • Aerogenic composition of pretensioner of automobile safety belt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Based on the total feeding amount, measure 30 parts by weight of deionized water or distilled water, heat to 90°C, add 30 parts by weight of potassium nitrate into it, stir and dissolve it; pour it into the kneader, start stirring, and then add 10 parts by weight of potassium perchlorate, stirred for about 5 minutes to 10 minutes, then added 5 parts by weight of sodium carboxymethyl cellulose, slowly added, the addition process should be slow, and the addition should be uniform to avoid caking of sodium carboxymethyl cellulose; Parts by weight of silicon powder, 20 parts by weight of guanidine nitrate, and 30 parts by weight of nitroguanidine are kneaded at room temperature for at least 1 hour to make the components evenly mixed.

[0062] Precautions: When starting to add combustibles, it must be stopped before adding materials, and wait for the personnel to retreat to a safe position before starting to stir.

[0063] Sampling and analyzing the moisture, if it is too hi...

Embodiment 2

[0066] Assuming that the total amount of feed is 100 parts, measure 30 parts by weight of deionized water or distilled water, heat to 90°C, add 17 parts by weight of potassium nitrate, stir and dissolve it; pour the solution into a kneader, stir , then add 6 parts by weight of potassium perchlorate, stir for about 5 minutes to 10 minutes, then add 5 parts by weight of sodium carboxymethylcellulose, add slowly, the adding process should be slow, and the addition should be uniform to avoid sodium carboxymethylcellulose agglomeration ; Add 42 parts by weight of guanidine nitrate and 30 parts by weight of nitroguanidine, and knead at room temperature for at least 1 hour to make the components evenly mixed.

[0067] All the other operations are the same as in Example 1.

Embodiment 3

[0069]Assuming that the total amount of feed is 100 parts, select carboxymethyl cellulose with a viscosity not greater than 100 mPa·s, add 43 parts of deionized water or distilled water, heat to 90 ° C, add 21 parts of potassium nitrate by weight, Stir and dissolve it; pour the solution into the kneader, stir, then add 6 parts by weight of potassium perchlorate, stir for about 5 minutes to 10 minutes, then add 5 parts by weight of sodium carboxymethyl cellulose, add slowly, the adding process should be slow, Add materials evenly to avoid agglomeration of sodium carboxymethylcellulose; add 3 parts by weight of silicon powder, 37 parts by weight of guanidine nitrate, and 28 parts by weight of nitroguanidine, and knead at room temperature for at least 1 hour to make the components mix evenly .

[0070] All the other operations are the same as in Example 1.

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Abstract

The invention discloses an aerogenic composition of a pretensioner of an automobile safety belt, which is prepared from flammable agent, mixed oxidants and adhesive, wherein the mass percent of the flammable agent, the mixed oxidants and the adhesive are respectively 40-85%, 10-55% and 2-10%. A preparation method of the aerogenic composition comprises the following steps of: kneading and mixing, extrusion moulding or squeezing, and cutting; then drying for 4h-12h under the condition that the room temperature is 60 DEG C; and then after drying for at least 6h under the temperature of 102-120 DEG C, carrying out screening treatment, obtaining medicine granula with the given size, and thermal packing by using a plastic bag. The aerogenic composition has good heat-resistant quality, good compatibility, wide sources and cost-effective raw materials, particularly has good thermal stability, and can replace nitrocellulose.

Description

technical field [0001] The present invention relates to a pyrotechnic type gas-generating composition, in particular to a gas-generating composition for a car seat belt pretensioner and its preparation, and is mainly used for micro-gas generation in a car seat belt pretensioner system device (often referred to as MGG) use. Background technique [0002] In the passive safety protection system of automobiles, safety airbags are usually installed to protect the driver and passengers (hereinafter referred to as passengers). Its characteristics are: when the car has a collision accident, it will first tighten the webbing before the occupant moves forward, and immediately fix the occupant tightly on the seat, preventing the occupant from leaning forward and moving, effectively protecting the safety of the occupant . [0003] The design service life required by the micro gas generator (MGG) is usually 15 years. Within the validity period, the time from its ignition to combustion ...

Claims

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Application Information

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IPC IPC(8): C06D5/06
Inventor 孙卫升王森陈保伟张致魁张虎张康熙宫万斌徐磊党婷杨爱武
Owner 陕西庆华汽车安全系统有限公司
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