CN202243321U - Electric ignition tube for miniature gas generator - Google Patents
Electric ignition tube for miniature gas generator Download PDFInfo
- Publication number
- CN202243321U CN202243321U CN2011203613150U CN201120361315U CN202243321U CN 202243321 U CN202243321 U CN 202243321U CN 2011203613150 U CN2011203613150 U CN 2011203613150U CN 201120361315 U CN201120361315 U CN 201120361315U CN 202243321 U CN202243321 U CN 202243321U
- Authority
- CN
- China
- Prior art keywords
- gas generator
- electrode
- squib
- micro gas
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000004033 plastic Substances 0.000 claims abstract description 22
- 229920003023 plastic Polymers 0.000 claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 229910052788 barium Inorganic materials 0.000 claims description 12
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 12
- 239000002360 explosive Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 12
- 235000013399 edible fruits Nutrition 0.000 claims description 9
- 150000007965 phenolic acids Chemical class 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 2
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 9
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- ITHZDDVSAWDQPZ-UHFFFAOYSA-L barium acetate Chemical compound [Ba+2].CC([O-])=O.CC([O-])=O ITHZDDVSAWDQPZ-UHFFFAOYSA-L 0.000 description 3
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 3
- 229910001626 barium chloride Inorganic materials 0.000 description 3
- 159000000009 barium salts Chemical class 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000972773 Aulopiformes Species 0.000 description 1
- 229920002449 FKM Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 235000019515 salmon Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The utility model discloses an electric ignition tube for a micro gas generator, which comprises a plastic sleeve, wherein the plastic sleeve is internally wrapped with a tube shell, ignition powder and an electrode plug component are arranged in the tube shell, the tube shell is in interference fit with the electrode plug component and is formed by laser welding, and the joint of the plastic sleeve and one side of the electrode plug component is wrapped with plastic; simple structure, stable performance, good sealing performance, no toxicity, no pollution, environmental protection and convenient automatic production, and the environmental test meets the American USCAR standard and is mainly used for miniature gas generators.
Description
Technical field
The utility model belongs to priming system design and manufacturing technology field, is specifically related to a kind of propulsion source, particularly a kind ofly is used for exciting the micro gas generator of pretensioner of automobile safety belt to use squib.
Background technology
The development of national economy and policy guidance have driven the develop rapidly of auto-industry.Developing of automobile industry rises to higher level with automotive safety.And, welcome vast market prospect as automobile passive safety system.The squib in passive safety system core drive source faces big opportunities and challenges.External air bag system is started to walk early, and squib is wide in variety, technology maturation.Domestic starting is late, and kind is few.The applicant has successively applied for the Chinese patent of squib at home in 1998,2003,2005, the patent No. is respectively CN98232456.1, CN200320109758.6, ZL200520078665.0.
The disclosed squib of Chinese patent (patent No. is CN98232456.1); It is made up of shell, starting mix agent, electrode plug etc.; Electrode plug is formed through conductive material is plastic by two core electrodes, and two electrode stored-energy welding modes are burn-on behind the glowing filament, above that the packaged composition of point of application powder composition; Be characterized in that electrode plug adopts core electrode and conductive material to process one and has the electric conductor of certain volume resistance; Make electrode plug form conductive channel, can effectively release is attached to various stray currents, the static on the squib, can prevent that safety air bag from producing misoperation.
The disclosed squib of Chinese patent (patent No. is CN200320109758.6); It comprises the electrode plug and a housing with holes of a profile step; Electrode plug is made up of two core electrodes and antistatic material; Two core electrodes feed the interior end of electrode plug and are connected with the glowing filament of certain resistance value, and on glowing filament, apply ignition charge and igniter successively, constitute the electrode plug of band medicine head; The electrode plug of band medicine head fits together with the medicine box that starting mix is housed, housing again, to tight mouthful of back assembling of housing sealing ring.
There is weak point in above-mentioned two kinds of squibs from its structure design: complex process, and inconvenient operation, process capability index is low, and yields is low, is not suitable for batch manufacturing.
The disclosed squib of Chinese patent (patent No. is ZL200520078665.0), it comprises plastic jacket, shell, ignition charge, igniter, electrode plug and coating plastic.Project organization is more advanced, stable performance, and process capability index is high, is fit to batch manufacturing, and the key property index is: firing current 1.2A/2ms, safety current 0.4A/10s, energy output is adjustable.
Above-mentioned three kinds of squibs are this enterprise and apply for.Preceding two kinds of complex process, operation inconvenience, process capability is low, the third squib; Good manufacturability, simple in structure, because firing current 1.2A/2ms; Safety current 0.4A/10s is mainly used in air-cushion inflator, and its performance figure can not satisfy some micro gas generator index request.Because energy output is excessive, it is too fast that a part of micro gas generator delivery pressure is grown up, and causes the damage of belt system.
Summary of the invention
The purpose of the utility model is, provides a kind of micro gas generator to use squib, its simple in structure, good manufacturability; Cost is low; Reliability is high, good environmental protection, and also to satisfy firing current be 0.8A/2ms; Safety current 0.25A/10s, can export and satisfy the micro gas generator requirement in-service time high conformity.
In order to realize above-mentioned task, the utility model is taked following technical scheme:
A kind of micro gas generator is used squib; Comprise plastic jacket, be coated with shell in the plastic jacket, igniter, ignition charge and electrode plug assembly are housed in the shell; It is characterized in that; Described shell and electrode plug assembly interference fit form through laser welding, and outside the plastic jacket and electrode plug assembly one side junction is coated with plastics;
Described electrode plug assembly is made up of long electrode, noncontinuous electrode, ring electricity ring, sintered glass body, scorching hot bridge silk with holes.
Some other characteristics of the utility model are:
Described shell selects for use stainless steel material to make the top end face reduction processing of shell.
Described long electrode and noncontinuous electrode are through the sealing of sintered glass body.
Described igniter is a ZPP type igniter, and minimum explosive load is 25mg.
Described ignition charge is this base of a fruit phenolic acid barium, and minimum explosive load is 15mg.
Described scorching hot bridge silk and ignition charge closed contact, ignition charge and igniter igniter closed contact.
The explosive load of described ZPP type igniter is 25mg～45mg.
The explosive load of described this base of a fruit phenolic acid barium is 15mg～45mg.
Described ZPP type igniter is mixed by zirconium powder, potassium perchlorate, aluminium powder and adhesives and forms.
Described long electrode and noncontinuous electrode are the metal pieces of a pair of band angle, surface gold-plating.
The micro gas generator of the utility model is used squib, and environment capacity satisfies U.S. USCAR standard, and performance satisfies the DC current that passes to 0.80A; In the closed bomb vessel of 10ml, reliably get angry, and satisfy point of ignition≤2ms, rise to maximum time≤2ms to pressure from beginning to produce pressure; Peak pressure can be adjusted; Satisfy the requirement of different micro gas generators, safety current is 200mA, energising 10s combustion miss.
The micro gas generator of the utility model is used squib, and the point of ignition precision is high.Simple in structure, stable performance, good airproof performance, automated production is convenient in nontoxic, pollution-free, environmental protection, and environmental test satisfies U.S. USCAR standard, is mainly used in micro gas generator.Because this base of a fruit phenolic acid barium is the simple substance ignition charge, the medicament particle size uniformity is good, and igniting defer time precision is high.
Description of drawings
Fig. 1 is the section of structure of the utility model;
Fig. 2 is the section-drawing of the electrode plug assembly among Fig. 1;
Fig. 3 is the birds-eye view of the electrode plug assembly among Fig. 2;
Fig. 4 is an ignition assembly cutaway view among Fig. 1.
Mark among the figure is represented respectively: 1, electrode plug assembly, 2, long electrode, 3, noncontinuous electrode, 4, ring electrode, 5, the sintered glass body, 6, scorching hot bridge silk, 7, ignition charge, 8, igniter, 9, shell, 10, plastic jacket, 11, plastics.
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed description.
The specific embodiment
Referring to Fig. 1～Fig. 4, present embodiment provides a kind of micro gas generator and uses squib, comprising: a shell 9; Be with salmon pink plastic jacket 10 on the shell of shell 9 with height such as shell grade; Begin by the bottom in the shell 9, igniter 8 is housed successively, ignition charge 7 and electrode plug assembly 1; Electrode plug assembly 1 relies on external force to compress into shell 9, and is basic concordant with shell 9 oral areas.Electrode plug assembly 1 is interference fit with shell 9, welds with the laser welding mode, refills to join plastics 11 sealings, can be made into the squib with certain interface size.
Used scorching hot bridge silk 6 is the redray silk, and diameter is 0.015mm～0.028mm.Resistance is 2.0 Ω ± 0.3 Ω, and scorching hot bridge silk 6 adopts the energy storage welding firm welding.
Adopt flash butt welding or energy storage welding mode that scorching hot bridge silk 6 is welded on the concordant end face of long electrode 2 and ring electrode 4.
Igniter 8 is a ZPP type igniter, and its minimum explosive load is 25mg.The scope of explosive load is 25mg～45mg.
That plastics 11 are selected from is high temperature resistant, water absorption rate is low, has the insulating material of higher-strength and dynamic ductility, as increasing nylon.
In the manufacturing process, first load point gunpowder 8 refills ignition charge 7 in shell 9; Then electrode plug assembly 1 and the shell 9 that fills medicament are assembled together; Adopt laser beam welding mode tight weld, the position of weld can be at shell 9 and electrode plug assembly 1 bonding crack place, also can be in shell 9 sides.
Igniter 8 is a ZPP type igniter, is mixed by zirconium powder, potassium perchlorate, aluminium powder and adhesives and forms, and the content of zirconium powder is 40%～60%; Potassium perchlorate content is 50%～65%; Aluminium powder is 3%～10%, and adhesives is 5%～10%, and adhesives is selected from viton or its compound.
Said ignition charge 7 is this base of a fruit phenolic acid barium, mainly by trinitroresorein magnesium solution and soluble barium salt such as barium nitrate, barium acetate or barium chloride solution reaction generation Barium trinitroresorcinate.The trinitroresorein magnesium solution is by trinitroresorein and magnesium carbonate or magnesia reaction generation.Magnesia and trinitroresorein are pressed the preparation of 6:1 mass ratio, and concentration is 6%～15%, volume 900ml～1300ml, and barium nitrate concentration is 4%～8%, volume 2300ml～2500ml, the crystal control agent addition is 1%～6% of a theory.
The application of ignition charge 7 is more extensive, is mainly the mixing ignition charge.Because technology and the characteristics of medicament material own, the homogeneity of medicament is restricted, the igniting defer time low precision of medicament.For overcoming above-mentioned shortcoming, the ignition charge 7 of present embodiment has been selected the simple substance ignition charge of this base of a fruit phenolic acid barium for use.Can realize through following technical scheme:
1, the reaction of trinitroresorein and magnesium carbonate or magnesia generates trinitroresorein magnesium;
2, ion exchange takes place in crystal control agent and soluble barium salt such as barium nitrate, barium acetate and barium chloride reaction;
3, trinitroresorein magnesium solution and soluble barium salt such as barium nitrate, barium acetate and barium chloride solution react and generate Barium trinitroresorcinate.
This this base of a fruit phenolic acid barium is through regulate crystal control agent within the specific limits, and the medicament crystallization that makes is even, and the delay precision of getting angry is high, satisfies squib performance and operating needs.
The micro gas generator of the utility model is used squib, has drawn the advantage of domestic and international product, its simple in structure, good manufacturability, and cost is low, steady quality, dependable performance.This micro gas generator has following characteristics with squib:
1, adopts the sintered glass electrode plug, be convenient to conformability and stability that scorching hot bridge wire bond connects operation and guarantees product resistance, make product have higher intensity and better seal property, can bear 138Mpa pressure and air tight.
2, adopt flash butt welding or energy storage welding welded bridge silk, simple to operate, high conformity, efficient is high.
3, assembly technology is simple, the electrode plug that directly will have a bridge silk with the external force shell of packing into.
4, the assembling back adopts laser beam welding with shell and electrode plug welding, guarantees the product good sealing property, can guarantee to bear strict environment examination, and leakage rate is less than 1 * 10
-6Cm
3/ s.
5, ignition charge adopts this base of a fruit phenolic acid barium, and sensitivity is moderate, and in-service time is short; Time precision is high; Can guarantee that squib satisfies point of ignition and is not more than 2ms, rise to maximum time to pressure and be not more than 2ms that firing current is not more than 800mA from beginning to produce pressure; Safety current is not less than 200mA, and fiduciary level is 0.999999.Peak pressure can be adjusted, and satisfies the requirement of different micro gas generators.
6, used ignition charge, igniter, coating plastic and process auxiliary material etc. are nontoxic, pollution-free, help environmental protection.
7, electrode plug assembly 1 is the electric conductor that is made up of one two core electrodes of a long electrode one noncontinuous electrode and ring electrode with holes through sintering; Make electrode plug form conductive channel, can release effectively is attached to various stray currents and the static on the squib.Both can prevent the misoperation of motor vehicle safety band, and can light micro gas generator when needed reliably again.
8, rational in infrastructure, production operation is convenient, and cost is low, steady quality, and dependable performance is fit to produce in enormous quantities.
Claims (9)
1. a micro gas generator is used squib; Comprise plastic jacket (10), be coated with shell (9) in the plastic jacket (10), igniter (8), ignition charge (7) and electrode plug assembly (1) are housed in the shell (9); It is characterized in that; Described shell (9) and electrode plug assembly (1) interference fit form through laser welding, and outside the plastic jacket (10) and electrode plug assembly (1) one side junction is coated with plastics (11);
Described electrode plug assembly (1) is made up of long electrode (2), noncontinuous electrode (3), ring electricity ring (4), sintered glass body (5), scorching hot bridge silk (6) with holes.
2. micro gas generator as claimed in claim 1 is used squib, it is characterized in that, described shell (9) selects for use stainless steel material to make the top end face reduction processing of shell (9).
3. micro gas generator as claimed in claim 1 is used squib, it is characterized in that, described long electrode (2) and noncontinuous electrode (3) are through sintered glass body (5) sealing.
4. micro gas generator as claimed in claim 1 is used squib, it is characterized in that, described igniter (8) is a ZPP type igniter, and minimum explosive load is 25mg.
5. micro gas generator as claimed in claim 1 is used squib, it is characterized in that, described ignition charge (7) is this base of a fruit phenolic acid barium, and minimum explosive load is 15mg.
6. micro gas generator as claimed in claim 1 is used squib, it is characterized in that, described scorching hot bridge silk (6) and ignition charge (7) closed contact, ignition charge (7) and igniter (8) igniter closed contact.
7. micro gas generator as claimed in claim 4 is used squib, it is characterized in that, the explosive load of described ZPP type igniter is 25mg～45mg.
8. micro gas generator as claimed in claim 5 is used squib, it is characterized in that, the explosive load of described this base of a fruit phenolic acid barium is 15mg～45mg.
9. micro gas generator as claimed in claim 7 is used squib, it is characterized in that, described long electrode (2) and noncontinuous electrode (3) are the metal pieces of a pair of band angle, surface gold-plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203613150U CN202243321U (en) | 2011-09-26 | 2011-09-26 | Electric ignition tube for miniature gas generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203613150U CN202243321U (en) | 2011-09-26 | 2011-09-26 | Electric ignition tube for miniature gas generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202243321U true CN202243321U (en) | 2012-05-30 |
Family
ID=46104608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203613150U Expired - Lifetime CN202243321U (en) | 2011-09-26 | 2011-09-26 | Electric ignition tube for miniature gas generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202243321U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014222A (en) * | 2015-07-03 | 2015-11-04 | 北京航天达盛电子技术有限公司 | Electrode plug manufacturing system and use method thereof |
| CN109580697A (en) * | 2018-12-13 | 2019-04-05 | 中国兵器科学研究院宁波分院 | Gun tube material ablation experimental rig and method |
| CN110887413A (en) * | 2019-11-27 | 2020-03-17 | 西安航天动力研究所 | High insensitive miniaturized electric detonator |
| CN112356800A (en) * | 2020-11-09 | 2021-02-12 | 陕西庆华汽车安全系统有限公司 | High-temperature auto-ignition safety airbag igniter, built-in ignition powder and preparation method |
| CN115594555A (en) * | 2022-09-23 | 2023-01-13 | 西安庆华民用爆破器材股份有限公司（Cn） | Environment-friendly high-temperature-resistant ignition agent |
-
2011
- 2011-09-26 CN CN2011203613150U patent/CN202243321U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014222A (en) * | 2015-07-03 | 2015-11-04 | 北京航天达盛电子技术有限公司 | Electrode plug manufacturing system and use method thereof |
| CN109580697A (en) * | 2018-12-13 | 2019-04-05 | 中国兵器科学研究院宁波分院 | Gun tube material ablation experimental rig and method |
| CN109580697B (en) * | 2018-12-13 | 2021-07-13 | 中国兵器科学研究院宁波分院 | Ablation test device and method for gun barrel material |
| CN110887413A (en) * | 2019-11-27 | 2020-03-17 | 西安航天动力研究所 | High insensitive miniaturized electric detonator |
| CN112356800A (en) * | 2020-11-09 | 2021-02-12 | 陕西庆华汽车安全系统有限公司 | High-temperature auto-ignition safety airbag igniter, built-in ignition powder and preparation method |
| CN115594555A (en) * | 2022-09-23 | 2023-01-13 | 西安庆华民用爆破器材股份有限公司（Cn） | Environment-friendly high-temperature-resistant ignition agent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
|
| CX01 | Expiry of patent term |