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Safety belt pre-tightening instrument gas production medicine and preparation method thereof

A technology of seat belt pretensioner and gas-producing drug, which can be applied to offensive equipment, generation of compressed gas, etc., can solve the problems of low gas-producing rate of military propellant

Active Publication Date: 2007-11-28
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of low gas production rate of the existing military propellants used for civil MGG gas production medicines and provide a kind of seat belt pretensioner gas production medicine with high gas production rate and its preparation method

Method used

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Examples

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preparation example Construction

[0013] The nitrocellulose can be prepared according to methods known to those skilled in the art. For example, the preparation method of the nitrocellulose comprises:

[0014] 1) At 150-160°C and 0.4-0.6 MPa, soak the plant fibers in an alkaline solution with a concentration of 4-10% by weight for 0.5-10 hours, and then cook 0.5-0.5- After 10 hours, linters were obtained.

[0015] The weight ratio of the plant fiber to the alkaline solution is 0.3-1:1.

[0016] The plant fibers can be parts such as seeds and stems of various plants, such as cotton seeds, hemp bast, jute bast, stems of coniferous trees, stems of broad-leaved trees, bamboo, reeds, straw, bagasse, etc.

[0017] The alkaline solution can be an aqueous solution of sodium hydroxide, potassium hydroxide, etc., preferably, in order to improve the infiltration effect and responsiveness of the alkaline solution to plant fibers, the alkaline solution can also contain 0.1-0.2 weight % of additives such as rosin soap. ...

Embodiment 1

[0039] The present embodiment illustrates the preparation of the seat belt pretensioner gas producing medicine provided by the present invention

[0040] 1) Preparation of nitrocellulose

[0041] At 150° C., under 0.4 MPa, soak the cotton seeds in a sodium hydroxide solution of 4% by weight for 1 hour, and the weight ratio of the cotton seeds to the sodium hydroxide solution is 0.5: 1; Under pressure, cook for 1 hour, then wash with hot water at 50°C and cold water at 5°C for 20 minutes to obtain linters.

[0042] At 15° C., the linters obtained above were rinsed with a sulfuric acid solution having a concentration of 2 g / L, and the linters were acidified for 25 minutes. The weight ratio of the linters to the sulfuric acid solution was 0.5:1. Then wash with 60 DEG C hot water and 10 DEG C cold water successively for 10 minutes, and dry at 60 DEG C, so that the moisture content of the cotton linters is not greater than 5% by weight.

[0043] Soak the cotton linters after the ...

Embodiment 2

[0049] The present embodiment illustrates the preparation of the seat belt pretensioner gas producing medicine provided by the present invention

[0050] 1) Preparation of nitrocellulose

[0051] At 150° C., under 0.5 MPa, the flax bast was immersed in a sodium hydroxide solution of 5% by weight for 5 hours, and the weight ratio of the flax bast to the sodium hydroxide solution was 1: 1; Under MPa pressure, cook for 5 hours, then wash with hot water at 60°C and cold water at 10°C for 2 hours to obtain linters.

[0052] At 20° C., the linters obtained above were rinsed with sulfuric acid having a concentration of 2 g / L, and the linters were acidified for 25 minutes. The weight ratio of the linters to the sulfuric acid solution was 0.6:1. Then wash the linters with hot water at 60° C. and cold water at 10° C. for 10 minutes, and dry at 60° C. so that the moisture content of the linters is not more than 5% by weight.

[0053] Soak the cotton linters after the above acidificatio...

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PUM

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Abstract

The gas forming agent for safety belt pre-fastener consists of nitrocellulose 60-90 wt%, combustion improver 1-10 wt%, oxidant 1-20 wt% and adhesive 1-10 wt%. The combustion improver is one or several selected from boron powder and inflammable metal powder; the oxidant is one or several selected from nitrate, chlorate and perchlorate; and the adhesive is one or several selected from phenolic resin, shellac varnish, bone glue, cellulose-base polymer and its salt. The gas forming agent for safety belt pre-fastener has no combustion residue, high gas producing rate and excellent safety belt fastening performance.

Description

technical field [0001] The invention relates to a gas-generating drug for deflagration or propelling gas, in particular to a gas-generating drug for a seat belt pretensioner and a preparation method thereof. Background technique [0002] Car seat belts have saved many lives over the decades since they were invented, and are now standard on cars. Seat belts are the most important protective facilities in automobile safety restraint systems, which play an important role in reducing occupant injuries in collision accidents, especially in protecting occupant chest and head safety. The pre-tensioned safety belt has been popularized rapidly because of its good protection effect and comfortable use performance. The main function of the pre-tensioned seat belt is to eliminate the slack between the webbing and the occupant before the collision begins within a few milliseconds, minimize the relative movement between the occupant and the vehicle body, and avoid secondary collisions ,...

Claims

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Application Information

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IPC IPC(8): C06D5/06
Inventor 魏德贤吴寒杰韩慧芳刘雪萍谭珂
Owner BYD CO LTD
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