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A kind of porous gas generating agent molded product and its preparation process

A technology of molded products and preparation technology, which is applied in the field of airbag gas generators, and can solve problems such as potential safety hazards of generators

Active Publication Date: 2021-02-09
HUBEI HANGPENG CHEM POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the agent contains ammonium nitrate formula, and the extrusion molding process is adopted. Due to the strong hygroscopicity of the ammonium nitrate formula, there are hidden dangers to the safety of the generator.

Method used

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  • A kind of porous gas generating agent molded product and its preparation process
  • A kind of porous gas generating agent molded product and its preparation process
  • A kind of porous gas generating agent molded product and its preparation process

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Experimental program
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Effect test

preparation example Construction

[0070] The preparation technology of porous gas generating agent specifically comprises the following steps:

[0071] (1) Mix the raw material components comprising at least fuel and oxidant to obtain the first material; the mixing is carried out in a mixing device, and the mixing time is 15min. The mixing device can be a V-type mixer, a three-dimensional multi-directional motion mixer, Automatic lifting hopper mixer, ribbon mixer or acoustic resonance mixer; wherein, the fuel is guanidine nitrate with a content of 50%, the oxidant is basic copper nitrate with a content of 31.75%, and the auxiliary oxidant It is ammonium perchlorate, and its content is 2% respectively; The shape retaining agent is strontium titanate and strontium nitrate, and its content is 5.5% and 9.75% respectively; In addition, the first material also includes functional additives to help demoulding The additives are talcum powder and graphite, the contents of which are 0.75% and 0.25% respectively.

[00...

Embodiment 1

[0083] The real-time working capacity of the rotary tablet press is 8.0t. The cross-section and size of the prepared two-hole gas generating agent are as follows Figure 6 As shown, D=8.62mm, H=3mm; the hole is a cylindrical hole through the cylinder, and its diameter d=1.4mm.

[0084] Put the two-hole gas generating agent prepared above into the PAB test generator, and perform the P-t performance test. The test results are shown in Table 1. The P-t test curve is as follows Figure 10 shown.

[0085] Table 1

[0086]

[0087] as table 1 and Figure 10 As shown, the above-mentioned two-hole gas-generating agent is used in the PAB generator, the maximum pressure is 355KPa, the 10ms pressure is only 56KPa, the Slope1 (slope) is 6.43, and the Slope3 (slope) is 8.60. The impact force when the bag is unfolded is small, the gas production pressure is stable, the air bag is not easy to be torn and damaged, and the design strength of the air bag module assembly is low, thereby r...

Embodiment 2

[0089] The real-time working capacity of the rotary tablet press is 7.5t. The cross-section and size of the prepared three-porous gas-generating agent are as follows Figure 7 As shown, D=9.1mm, H=3mm; the hole is a cylindrical hole through the cylinder, and its diameter d=1.4mm.

[0090] Put the three-hole gas generating agent prepared above into the PAB test generator, and perform the P-t performance test. The test results are shown in Table 2. The P-t test curve is as follows Figure 10 shown.

[0091] Table 2

[0092]

[0093] as table 2 and Figure 10 As shown, the above-mentioned triangular three-hole gas generating agent is used in the PAB generator, the maximum pressure is 356KPa, the 10ms pressure is only 42kPa, the Slope1 (slope) is 5.00, and the Slope3 (slope) is 9.40. The impact force is small, and the air bag is not easy to tear and break. The high slope in the later stage helps the air bag to expand and maintain the full state for a long time. The design s...

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Abstract

The present invention relates to a porous gas-generating agent molded product and its preparation process. The porous gas-generating agent molded product is a columnar body with a plurality of holes arranged inside along the height direction. The ratio of the largest dimension ranges from 0.3 to 1.8; and the ratio of the total cross-sectional area of ​​the columnar body to the total cross-sectional area of ​​the columnar body ranges from 0.03 to 0.15. The combustion process of the compressed porous gas-generating agent can realize equal-surface combustion or surface-increasing combustion, or multi-stage combustion under different conditions, so as to adjust the P-t performance of the gas generator according to the demand, thereby reducing the material cost of the gas generator and The quality of the generator; the compressed porous gas generating agent is mainly used for automobile airbag gas generators; the present invention adopts the compression molding process, and for the first time realizes the preparation of small porous gas generating agents in the form of compression molding, making the preparation process simple, efficient, and efficient. Easy to operate and control.

Description

technical field [0001] The invention relates to a molded product of a porous gas generating agent and a preparation process thereof, in particular to a molded product of a small porous gas generating agent prepared by a compression molding process, and belongs to the technical field of airbag gas generators. Background technique [0002] An automotive airbag system consists of a gas generator that generates gas, an airbag for protection, and an exterior that supports the above two parts. The gas generator contains a gas generating agent, which is activated when needed. The gas generating agent burns to generate a large amount of gas, and the air bag is filled to protect personal safety. [0003] At present, the mainstream gas generating agents in the world are guanidine nitrate and basic copper nitrate gas generating agents, with guanidine nitrate as the main fuel and basic copper nitrate as the main oxidant. The tablet shape of this kind of gas generating agent is usually ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B45/00C06B31/00C06B21/00C06D5/06
CPCC06B21/00C06B31/00C06B45/00C06D5/06
Inventor 罗运强任响宁王秋雨杜涛张俊王晨杨志雄张印明刘柳付文斌陈爱萍黄聪
Owner HUBEI HANGPENG CHEM POWER TECH
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