JPWO2005052496A1 - Igniters and gas generators - Google Patents

Abstract

To improve the strength of the embolus at high temperatures to reduce the thickness of the embolizer and reduce the size of the igniter and gas generator, and to reliably prevent the electrode pins from popping out. An igniter having a resistance heating element, an explosive that is ignited by heat generation of the resistance heating element, an electrode pin connected to the resistance heating element, and an embolus that holds the electrode pin, and the material of the embolus is thermosetting It is a characteristic resin. A gas generator comprising: a cup filled with a gas generating agent that generates gas by combustion; the igniter disposed inside the cup; and a holder for holding the igniter and the cup, The holder has insertion holes through which the electrode pins are individually inserted.

Description

  The present invention relates to an igniter used for a gas generator and a gas generator for operating an occupant safety protection device such as a seat belt pretensioner of an automobile.

  Seat belt pretensioners and airbags are known as devices that protect passengers from impacts caused by automobile collisions. These pretensioners and the like are activated by a large amount of gas introduced from the gas generator to protect the occupant. Further, the gas generator includes an igniter, a gas generating agent, and the like, and ignites and burns the gas generating agent by igniting the igniter at the time of collision, thereby rapidly generating a large amount of gas.

  As an example of the igniter used in the gas generator, there is an igniter 104 shown in FIG. 5 in which a plug 107 fitted in the cup 112 and sealing the igniting agent 103 is formed of a thermoplastic resin or the like. The embolus 107 is provided with two electrode pins 108 and 109 that penetrate the embolus 107. Each of the electrode pins 108 and 109 protrudes into the cup 112 and electrically connects the bridge 110 to the tip. The electric bridge wire 110 is covered with an ignition ball 111 in contact with the ignition powder 103. The ignition ball 111 has excellent ignition sensitivity and is ignited by the heat generated by the bridge wire 110 to ignite the ignition agent 103.

  The igniter 104 is attached to a gas generator, and is energized by a collision signal from a collision sensor to cause the bridge wire 110 to generate heat. The heated bridge line 110 ignites the ignition ball 111 and subsequently ignites and burns the ignition powder 103. The gas generating agent 101 is ignited and combusted by the generated pressure and heat generated by burning the ignition powder 103, and the generated gas is ejected to the seat belt pretensioner.

  An example of a conventional gas generator for a seat belt pretensioner is shown in FIG. 6 includes a gas generating agent 101 that generates a large amount of gas by ignition, an igniter 104 (see FIG. 5) that stores an ignition agent 103 that is ignited by energization, and a gas generating agent 101. , The igniter case 114 covering the cup 112, the igniter 104 and the igniter case 114 are fixed to the center, and the gas generating agent 101 and the igniter 104 are sealed inside the cup 102. A holder 106, an O-ring 115 disposed in the gap between the igniter 104 and the holder 106 to prevent moisture from entering through the gap between the igniter 104 and the holder 106, and two erected from the igniter 104 And a shorting clip 113 for short-circuiting the electrode pins 108 and 109. In addition, a sealing agent (not shown) is applied to the gap between the cup 102 and the holder 106 in order to prevent moisture from entering.

  Here, the material of the embolus 107 is made of a thermoplastic resin. As this thermoplastic resin, specifically, a synthetic resin such as polybutylene terephthalate (PBT), nylon 6, nylon 66 or the like mixed with glass fiber or the like is used (for example, see Patent Document 1). .

  In addition, it has also been proposed to mold the embolus with a thermosetting resin such as unsaturated polyester (see, for example, Patent Document 2).

  Patent Document 3 discloses a gas generator including an igniter having a plug formed of an insulating support portion made of an epoxy resin, a cylindrical metal sleeve, and a covering molding portion made of a thermoplastic resin. .

  Patent Document 4 discloses an igniter that has a solid body, a plug made of a glass sheath, and is sealed with an epoxy resin.

  Patent Document 5 discloses a gas generator including an igniter having a header (emboli) made of a thermosetting resin that is a thermoplastic resin or an unsaturated polyester.

  Patent Document 6 discloses a gas generator including an igniter having a header (emboli) made of glass fiber reinforced resin.

  Further, Patent Document 7 discloses a gas generation having a holder in which two insertion holes through which two electrode pins are individually inserted, and an igniter in which a hermetic material corresponding to an embolus is formed of an insulating resin. A vessel is disclosed.

JP 2003-25950 A (page 4 and FIG. 4) JP 2002-90097 (page 5) JP 2000-108838 A (page 5) Japanese Patent Laid-Open No. 2000-241099 (pages 4 and 5) International Publication No. WO01 / 031281 Pamphlet International Publication No. WO01 / 031282 Pamphlet JP 2000-292100 A (FIG. 1)

  As described above, in the conventional igniter, when the embolus for sealing the ignition agent in the cup is made of a resin, it is generally made of a thermoplastic resin. For this reason, when an igniter is incorporated into a gas generator and used, and a vehicle fire occurs in the event of an automobile collision, or when the gas generant burns during a combustion test of the gas generator at a higher temperature than expected There is a possibility that the embolus composed of the thermoplastic resin is softened and the two electrode pins penetrating the embolus are popped out by the high gas pressure in the gas generator. In addition, when the thickness of the embolus is increased in order to prevent such a state, the size of the igniter increases accordingly, so that the gas generator becomes larger or the size of the gas generator is increased. If this is not possible, the amount of gas generating agent that can be charged will be reduced. In addition, in the case of an embolus manufactured using a material in which the electrode pin and the part into which the electrode pin is inserted are made of metal and sealed with glass, the cost of parts is high, and a process for melting the glass is necessary for manufacturing Therefore, the manufacturing cost is high, resulting in an expensive embolus.

  In addition, when the embolus is formed of an unsaturated polyester composition, it takes a relatively long time to completely cure, resulting in poor productivity. When a peroxide is used as the curing reaction initiator, There is a problem that the workability is inferior because it is unstable because it is unstable.

  Moreover, when the embolus part is comprised with several members, there exists a problem of the sealing property of each member. In addition, there is a problem that the number of parts increases and it takes time to manufacture.

  The purpose of the present invention is to reduce the embolizer thickness by improving the strength of the embolus at high temperatures without significantly reducing productivity, and to reliably prevent the electrode pin from popping out. It is another object of the present invention to obtain an igniter that secures a sealing property between an embolus and an electrode pin, and a gas generator using the igniter. It is preferable to obtain a gas generator in which the electrode pin and the holder are integrally formed with a thermosetting resin, and more preferably, the electrode pin and the holder are integrally formed with an epoxy resin.

  The igniter according to the present invention includes a resistance heating element, an explosive that is ignited by heat generation of the resistance heating element, an electrode pin connected to the resistance heating element, and an embolus that holds the electrode pin. The embolization material is a thermosetting resin.

  The igniter of the present invention includes a cup for storing an ignition agent, an embolus that is attached to the cup and seals the ignition agent in the cup, two electrode pins that pass through the embolus, and two electrode pins. It has a bridge wire connecting the end portion in the cup, and an ignition ball that covers the bridge wire and contacts an igniting agent, and the embolization material is an epoxy resin composition. Good.

  In the igniter of the present invention, the epoxy resin composition preferably contains an epoxy resin and a curing agent. Moreover, it is preferable that the said epoxy resin composition contains 30 to 95 weight% filler with respect to all the epoxy resin compositions. The filler preferably contains at least one of fused silica, crystalline silica, aluminum oxide, and calcium carbonate. The epoxy resin preferably includes at least one of a bisphenol type epoxy resin, a novolac type epoxy resin, a biphenyl type epoxy resin, a naphthalene type epoxy resin, an alicyclic epoxy resin, and an amine epoxy resin. The curing agent preferably includes at least one of a phenol novolac resin, an acid anhydride, and amines. The curing agent preferably contains a curing accelerator. It is preferable that a stepped portion having a smaller diameter on the holder side is formed at the end portion on the holder side of the embolus.

  The gas generator of the present invention includes a cup filled with a gas generating agent that generates gas by combustion, an igniter disposed inside the cup, and a holder for holding the igniter and the cup. The igniter is a gas generator having a resistance heating element, an explosive that is ignited by heat generation of the resistance heating element, an electrode pin connected to the resistance heating element, and a plug that holds the electrode pin, The material of the embolus is a thermosetting resin, and the holder has an insertion hole through which the electrode pin is individually inserted.

  The gas generator of the present invention may have the igniter of the present invention. Further, the gas generator of the present invention includes an ignition having a second cup filled with a gas generating agent that generates gas by combustion, and a first cup that is disposed inside the second cup and stores an ignition powder. And a holder for holding the igniter and the second cup, and the igniter is mounted on the first cup and seals the igniting agent in the first cup, and passes through the plug. Two electrode pins extending to the holder side, two insertion holes through which the two electrode pins are individually inserted are formed in the holder, and the material of the embolus is formed of a thermosetting resin composition. It may be characterized by being.

  In the gas generator of the present invention, each root portion of each electrode pin extending from the embolus is covered with a protrusion formed integrally with the embolus, and the protrusion is inserted into the insertion hole. It is preferable. Moreover, it is preferable that the step part which the diameter by the side of a holder becomes small is formed in the edge part by the side of the said holder of the said embolus. The embolic material is preferably formed of an epoxy resin composition. The area of the two insertion holes is preferably more than 1 time and less than 10 times the cross-sectional area of the electrode pin. Moreover, it is preferable that the sealing material which seals between a holder and an embolus is provided in the vicinity part of the said step part.

  In the igniter of the present invention, since the embolus is formed of a thermosetting resin, the embolus has sufficient strength even at high temperatures, and the embolus does not soften at high temperatures, thus preventing the electrode pin from coming out of the embolus. it can. By doing so, compared to the case where a thermoplastic resin is used, the strength necessary to prevent the electrode pin from popping out can be secured even if the embolus thickness is reduced. Can be miniaturized.

  In the gas generator of the present invention, two electrode pins are respectively inserted into two insertion holes having a small area formed in the holder. Therefore, even when the ignition powder burns and the inside of the second cup is in a high temperature and high pressure state, most of the end face of the embolus comes into contact with the holder and is reliably received, and the two electrode pins are removed from the holder. It is hard to come out and jump out. In addition, since the gap between the electrode pin and the holder is close in the insertion hole, when static electricity flows during the electrical test, there is no explosive or igniting agent between the electrode pin portion and the holder insertion hole. By discharging, static electricity can be released, and discharge that can ignite gunpowder and ignition powder can be prevented.

  As shown in FIG. 1, the igniter 4 of the present invention includes an ignition powder 10, a first cup 11 that covers and stores the ignition powder 10, and a first cup 11 that is partially fitted in the first cup 11. An embolus 13 that seals the ignition powder 10 therein, and two electrode pins 14 and 15 that extend through the embolus 13 toward the holder 5 are included. As shown in FIG. 1, the tip portions of the two electrode pins 14 and 15 on the first cup 11 side are electrically connected by a resistance heating element 16, and the resistance heating element 16 is an ignition ball in contact with the ignition powder 10. 17 is covered. That is, in the igniter 4, when the electrode pins 14 and 15 are energized, the resistance heating element 16 generates heat, whereby the ignition ball 17 is ignited, and subsequently, the ignition powder 10 in contact with the ignition ball 17 is ignited. It is configured to burn. In the igniter 4 of the present invention, the power equivalent to that when the ignition powder 10 is mounted is adjusted by adjusting the amount of the ignition ball 17 covering the resistance heating element 16 without using the ignition powder 10. It is preferable to have it. In that case, it is more preferable to remove the first cup. Moreover, as a method of storing the ignition powder in a cover, it is conceivable to apply a resin or the like in addition to the cup, and the method is not particularly limited.

The material of the electrode pins 14 and 15 used for the embolus 13 is preferably an alloy containing nickel, iron or stainless steel.
As the resistance heating element 16, for example, a so-called electric bridge wire made of a metal such as a nickel chromium alloy or platinum can be cited. Moreover, the thing using the resistance heating element (SCB) using a semiconductor manufacturing technique is preferable. Of these, those using reactive bridges are more preferable.

  Moreover, the 1st cup 11 has a bottomed cylindrical shape, The heat flow produced when the ignition powder 10 in the 1st cup 11 was ignited in the bottom face in the 2nd cup 3 (FIG. 2). A fire guiding portion 11a for jetting into the gas generating agent 2 is formed. The igniting part 11a may have a notch called a score. Further, an engaging portion 11 b that engages with the embolus 13 is formed at the end of the first cup 11 on the opening side. Examples of the material forming the first cup 11 include plastic materials such as polybutylene terephthalate, polyethylene terephthalate, nylon 6 and nylon 66.

  In the igniter 4 of the present invention, when a specified current is applied between the electrode pins 14 and 15, the resistance heating element 16 generates heat almost instantaneously. Due to this heat generation, the ignition ball is stably ignited, whereby the igniting agent 10 is burned, the internal pressure of the first cup 11 is increased, and the bottom portion (the igniting portion 11a) of the first cup 11 is ruptured. And the flame of the ignition powder 10 is ejected from the igniter into the gas generator.

  The igniter 4 of the present invention is usually manufactured by performing the following steps. (1) a step of forming two electrode pins, (2) a step of forming embolus 13, (3) a step of forming a welding surface on each of electrode pins 14 and 15, and (4) a step of welding resistance heating element 16 (5) A step of applying an ignition ball to the resistance heating element 16, (6) a step of bringing the ignition ball into contact with the ignition powder 10, and (7) a step of fitting the plug 13 into the first cup 11.

  FIG. 2 shows a gas generator using the igniter of the present invention in FIG. In the gas generator 1, the entire first cup 11 of the igniter 4 is covered with a bottomed cylindrical igniter case 12 (also referred to as a squib case) (FIG. 2). At the bottom of the igniter case 12, a heat conduction hole 12 a for ejecting a heat flow to the gas generating agent 2 in the second cup 3 is formed. Further, a flange portion 12 b for attaching to the holder 5 is formed in a tapered shape at the opening side end portion of the igniter case 12. The squib case 12 can be formed of, for example, a metal material such as iron, stainless steel, or aluminum, or a synthetic resin such as PBT (polybutylene terephthalate) or fluorine resin. Thus, since the 1st cup 11 which accommodated the ignition powder 10 is covered with the igniter case 12, the restraint force of the 1st cup 11 increases and when the ignition powder 10 ignites, The first cup 11 can be prevented from breaking before the pressure increases, and the ignition powder 10 can be burned under high pressure. As a result, the combustion rate of the ignition powder 10 is increased, and the ignition delay of the gas generating agent 2 is reduced. In addition, it is not always necessary to form the igniter 11a of the first cup 11 and the igniter hole 12a of the igniter case 12 on the bottom surface, and one or a plurality of them are provided on the cylindrical side surfaces of the first cup 11 and igniter case 12. The igniting part 11a and the igniting hole 12a may be formed.

  As shown in FIG. 1, the embolus 13 includes an insertion portion 13 a that is inserted into the first cup 11 so as to be fitted inside, a large diameter portion 13 b that is tapered from the base end of the insertion portion 13 a, A small-diameter portion 13c having a smaller diameter than the large-diameter portion 13b and continuing to the large-diameter portion 13b via a stepped portion 13e. The transition portion 13 f from the large diameter portion 13 b to the small diameter portion 13 c is a surface perpendicular to the parallel portions of the electrode pins 14 and 15. As described above, the stepped portion 13e is formed at the left end portion (the end portion on the holder 5 side) of the embolus 13 so that the large diameter portion 13b of the embolus 13 is thinned. The insertion portion 13a is fitted in the first cup 11 and engaged with the engagement portion 11b, so that the embolus 13 does not come out of the first cup 11. The wall thickness of the embolus 13b is preferably 1.6 mm to 2 mm.

  As shown in FIG. 2, in the vicinity of the stepped portion 13 e on the left surface of the large diameter portion 13 b, a gasket 18 that prevents moisture from entering the second cup 3 from between the embolus 13 and the holder 5. (Seal material) is installed. Here, instead of the gasket 18, a liquid sealing agent may be applied. Further, the igniter case 12 and the plug 13 are attached to the holder 5 by being caulked by the annular protrusion 5c of the holder 5 in a state where the tapered flange portion 12b of the igniter case 12 is in close contact with the tapered surface of the large diameter portion 13b. ing.

  The two electrode pins 14 and 15 pass through the embolus 13, one end side portion thereof protrudes into the first cup 11, the other end side portion extends to the holder 5 side, and further passes through the holder 5. Yes. The ends of the electrode pins 14 and 15 protruding into the first cup 11 are electrically connected by a resistance heating element 16. On the other hand, the base portion of the portion that protrudes from the embolus 13 toward the holder 5 is covered with a truncated cone-shaped protrusion 13 d that slightly protrudes from the small diameter portion 13 c of the embolus 13 toward the holder 5.

  By the way, the material of the embolus 13 is a thermosetting resin. Among thermosetting resins, an epoxy resin composition is preferable from the viewpoints of curability and moisture resistance. This thermosetting resin composition preferably has an epoxy resin and a curing agent. In addition, even if it is a thermosetting resin, unsaturated polyester is equivalent to an epoxy resin composition in terms of fire resistance, but is not preferable because it is inferior to an epoxy resin composition in terms of adhesion to metal.

The types of epoxy resins include, for example, polyfunctional epoxy resins that are glycidyl etherified products of polyphenol compounds, polyfunctional epoxy resins that are glycidyl etherified products of various novolak resins, alicyclic epoxy resins, aliphatic epoxy resins, and heterocyclic rings. Epoxy resin, glycidyl ester epoxy resin, glycidyl amine epoxy resin,
Examples thereof include epoxy resins obtained by glycidylation of halogenated phenols.

  Examples of polyfunctional epoxy resins that are glycidyl etherification products of polyphenol compounds include phenol, cresol, bisphenol A, bisphenol F, bisphenol S, 4,4′-biphenylphenol, tetramethylbisphenol A, dimethylbisphenol A, and tetramethylbisphenol. F, dimethyl bisphenol F, tetramethyl bisphenol S, dimethyl bisphenol S, tetramethyl-4,4′-biphenol, dimethyl-4,4′-biphenylphenol, 1- (4-hydroxydiphenyl) -2- [4- ( 1,1-bis- (4-hydroxydiphenyl) ethyl) phenyl] propane, 2,2′-methylene-bis (4-methyl-6-tert-butylphenol), 4,4′-butylidene-bis (3-methyl) -6 ert-butylphenol), trishydroxyphenylmethane, resorcinol, hydroquinone, pyrogallol, phenols having a diisobrobiridene skeleton, phenols having a fluorene skeleton such as 1,1-di-4-hydroxyphenylfluorene, phenolized polybutadiene, etc. Examples thereof include an epoxy resin which is a glycidyl etherified product of a polyphenol compound.

  Examples of polyfunctional epoxy resins that are glycidyl etherification products of various novolak resins include various phenols such as phenol, cresols, ethylphenols, butylphenols, octylphenols, bisphenol A, bisphenol F, bisphenol S, and naphthols. Glycidyl etherification products of various novolac resins such as novolak resin as raw material, phenol novolak resin having xylylene skeleton, phenol novolak resin having dicyclopentadiene skeleton, phenol novolac resin having biphenyl skeleton, phenol novolac resin having fluorene skeleton, etc. Can be mentioned.

  Examples of the alicyclic epoxy resin include alicyclic epoxy resins having a cyclohexane skeleton such as 3,4-epoxycyclohexylmethyl-3 ′, 4′-cyclohexylcarboxylate.

  Examples of the aliphatic epoxy resin include glycidyl ethers of polyhydric alcohols such as 1,4-butanediol, 1,6-hexanediol, polyethylene glycol, polypropylene glycol, pentaerythritol, and xylylene glycol derivatives. .

  Examples of the heterocyclic epoxy resin include heterocyclic epoxy resins having a heterocyclic ring such as an isocyanuric ring and a hydantoin ring.

  Examples of the glycidyl ester epoxy resin include epoxy resins made of carboxylic acids such as hexahydrophthalic acid diglycidyl ester and tetrahydrophthalic acid diglycidyl ester.

Examples of the glycidylamine epoxy resin include epoxy resins obtained by glycidylation of amines such as aniline, toluidine, p-phenylenediamine, m-phenylenediamine, diaminodiphenylmethane derivative, diaminomethylbenzene derivative and the like.
Examples of epoxy resins obtained by glycidylation of halogenated phenols include brominated bisphenol A, brominated bisphenol F, brominated bisphenol S, brominated phenol novolak, brominated cresol novolac, chlorinated bisphenol S, chlorinated bisphenol A, and bromo. Examples thereof include epoxy resins obtained by glycidylation of halogenated phenols such as phenol.

  The use of these epoxy resins is not particularly limited and is appropriately selected depending on the intended use, but preferably bisphenol type epoxy resin, novolac type epoxy resin, biphenyl type epoxy resin, naphthalene type epoxy resin, alicyclic epoxy resin, amine Epoxy resin. Particularly preferred are bisphenol A type epoxy resins and novolac type epoxy resins. Furthermore, these epoxy resins are appropriately selected according to necessity such as electrical insulation, adhesiveness, water resistance, mechanical strength, workability and the like, and can be used as one kind or a mixture of two or more kinds.

  Examples of the curing agent include acid anhydrides, amines, phenols, imidazoles and the like.

  Examples of acid anhydrides include aromatic carboxylic acids such as phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol trimellitic anhydride, and biphenyltetracarboxylic anhydride. Anhydrides, azelaic acid, sebacic acid, anhydrides of aliphatic carboxylic acids such as dodecanedioic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, nadic acid anhydride, het acid anhydride, hymic acid anhydride, etc. And alicyclic carboxylic acid anhydrides. Examples of the phthalic anhydride include 4-methylhexahydrophthalic anhydride. Particularly preferred is 4-methylhexahydrophthalic anhydride.

  Examples of amines include aromatic amines such as diaminodiphenylmethane, diaminodiphenylsulfone, and diaminodiphenyl ether, aliphatic amines, and modified amines.

  Examples of the phenols include bisphenol A, tetrabromobisphenol A, bisphenol F, bisphenol S, 4,4′-biphenylphenol, 2,2′-methylene-bis (4-methyl-6-tert-butylphenol), 2, 2'-methylene-bis (4-ethyl-6-tert-butylphenol), 4,4'-butylene-bis (3-methyl-6-tert-butylphenol), 1,1,3-tris (2-methyl- 4-hydroxy-5-tert-butylphenol), trishydroxyphenylmethane, pyrogallol, phenols having a diisobrobilidene skeleton, phenols having a fluorene skeleton such as 1,1-di-4-hydroxyphenylfluorene, phenolized polybutadiene Polyphenol compounds such as Novolak resins made from various phenols such as anol, cresols, ethylphenols, butylphenols, octylphenols, bisphenol A, brominated bisphenol A, bisphenol F, bisphenol S, naphthols, phenol novolac resins having a xylylene skeleton, Examples thereof include various novolak resins such as a phenol novolak resin having a dicyclopentadiene skeleton and a phenol novolak resin having a fluorene skeleton.

  Examples of imidazoles include 2-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-phenylimidazole, 1-benzyl- 2-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazole, 2,4-diamino-6 (2′-methylimidazole (1 ′)) ) Ethyl-s-triazine, 2,4-diamino-6 (2′-undecylimidazole (1 ′)) ethyl-s-triazine, 2,4-diamino-6 (2′-ethyl, 4-methylimidazole ( 1 ′)) Ethyl-s-triazine, 2,4-diamino-6 (2′-methyl) Imidazole (1 ′)) ethyl-s-triazine isocyanuric acid adduct, 2-methylimidazole isocyanuric acid 2: 3 adduct, 2-phenylimidazole isocyanuric acid adduct, 2-phenyl-3,5-dihydroxymethylimidazole , 2-phenyl-4-hydroxymethyl-5-methylimidazole, various imidazoles of 1-cyanoethyl-2-phenyl-3,5-dicyanoethoxymethylimidazole, and imidazoles and phthalic acid, isophthalic acid, terephthalic acid And salts with polyvalent carboxylic acids such as trimellitic acid, pyromellitic acid, naphthalenedicarboxylic acid, maleic acid, and succinic acid. Among these curing agents, which curing agent is used is appropriately selected depending on the characteristics required for the squib structure for ignition or workability, but acid anhydrides, phenol novolac resins, and amines are preferable. The amount of these curing agents used is in the range of 0.3 to 2.0, preferably in the range of 0.4 to 1.6, more preferably in the equivalent ratio of the curing agent to the epoxy group of the thermosetting resin. Is used in the range of 0.5 to 1.3. Moreover, 2 or more types of hardening | curing agents can also be mixed and used, and imidazoles can also be used as a hardening accelerator.

  Examples of the curing accelerator include 2-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-phenylimidazole, 1-benzyl. 2-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazole, 2,4-diamino-6 (2′-methylimidazole (1 ′ )) Ethyl-s-triazine, 2,4-diamino-6 (2′-undecylimidazole (1 ′)) ethyl-s-triazine, 2,4-diamino-6 (2′-ethyl, 4-methylimidazole) (1 ′)) Ethyl-s-triazine, 2,4-diamino-6 (2′-methylimi Sol (1 ′)) ethyl-s-triazine isocyanuric acid adduct, 2-methylimidazole isocyanuric acid 2: 3 adduct, 2-phenylimidazole isocyanuric acid adduct, 2-phenyl-3,5-dihydroxymethylimidazole , 2-phenyl-4-hydroxymethyl-5-methylimidazole, various imidazoles of 1-cyanoethyl-2-phenyl-3,5-dicyanoethoxymethylimidazole, and imidazoles and phthalic acid, isophthalic acid, terephthalic acid , Salts with polyvalent carboxylic acids such as trimellitic acid, pyromellitic acid, naphthalenedicarboxylic acid, maleic acid and succinic acid, amides such as dicyandiamide, 1,8-diaza-bicyclo (5.4.0) undecene-7 Such as diaza compounds and their phenols, Rubonic acids or salts with phosphinic acids, tetrabutylammonium bromide, cetyltrimethylammonium bromide, ammonium salts such as trioctylmethylammonium bromide, phosphines such as triphenylphosphine and tetraphenylphosphonium tetraphenylborate, 2,4,6 -Phenols such as trisaminomethylphenol, amine adducts, and microcapsule type curing accelerators in which these curing agents are made into microcapsules. Which of these curing accelerators is used is appropriately selected depending on characteristics required for the obtained transparent resin composition, such as transparency, curing speed, and working conditions. When using a hardening accelerator, the usage-amount is 0.1-5 mass parts with respect to 100 mass parts of thermosetting resins, Preferably it is around 1 mass part.

  Examples of the filler include various silicas such as fused silica and crystalline silica, silicon carbide, silicon nitride, boron nitride, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, mica, talc, clay, aluminum oxide, magnesium oxide, zirconium oxide. , Aluminum hydroxide, magnesium hydroxide, calcium silicate, aluminum silicate, lithium aluminum silicate, zirconium silicate, barium titanate, glass fiber, carbon fiber, molybdenum disulfide, asbestos, etc., preferably fused silica, crystalline silica , Calcium carbonate, aluminum oxide, aluminum hydroxide, calcium silicate, more preferably fused silica, crystalline silica, aluminum oxide, calcium carbonate, and the like. The use amount of these fillers is preferably 30 to 95% by weight, more preferably 40 to 90% by weight, and particularly preferably 50 to 90% by weight of the total thermosetting resin composition in accordance with the required performance and workability. is there. These fillers may be used alone or in combination of two or more.

  According to the purpose, for example, a colorant, a coupling agent, a leveling agent, a lubricant and the like can be appropriately added to the epoxy resin composition.

  There are no particular limitations on the colorant, such as phthalocyanine, azo, disazo, quinacridone, anthraquinone, flavantron, perinone, perylene, dioxazine, condensed azo, azomethine-based various organic dyes, titanium oxide, lead sulfate, chromium yellow, zinc yellow, Examples thereof include inorganic pigments such as chrome vermilion, valve shell, cobalt violet, bitumen, ultramarine, carbon black, chrome green, chromium oxide, and cobalt green.

  As the coupling agent, for example, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxy Silane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane , Vinyltrimethoxysilane, N- (2- (vinylbenzylamino) ethyl) 3-aminopropyltrimethoxysilane hydrochloride, 3-methacryloxypropyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyl Silane coupling agents such as limethoxysilane, isopropyl (N-ethylaminoethylamino) titanate, isopropyl triisostearoyl titanate, titanium di (dioctyl pyrophosphate) oxyacetate, tetraisopropyl di (dioctyl phosphite) titanate, neo Titanium coupling agents such as alkoxytri (p-N- (β-aminoethyl) aminophenyl) titanate, Zr-acetylacetonate, Zr-methacrylate, Zr-propionate, neoalkoxyzirconate, neoalkoxytrisneodecanoyl Zirconate, Neoalkoxytris (dodecanoyl) benzenesulfonyl zirconate, Neoalkoxytris (ethylenediaminoethyl) zirconate, Neoalkoxytri Zirconium (m-aminophenyl) zirconate, ammonium zirconium carbonate, Al-acetylacetonate, Al-methacrylate, Al-propionate, and other zirconium and aluminum coupling agents can be mentioned, and silicon coupling agents are preferred. By using a coupling agent, a cured product having excellent moisture resistance reliability and little decrease in adhesive strength after moisture absorption can be obtained.

  Examples of the leveling agent include oligomers having a molecular weight of 4000 to 12000 made of acrylates such as ethyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate, epoxidized soybean fatty acid, epoxidized abiethyl alcohol, hydrogenated castor oil, and titanium coupling agent Etc.

  Examples of the lubricant include hydrocarbon lubricants such as paraffin wax, microwax and polyethylene wax, higher fatty acid lubricants such as lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid and behenic acid, stearylamide, palmitylamide Higher fatty acid amide lubricants such as oleylamide, methylenebisstearamide, ethylenebisstearamide, hydrogenated castor oil, butyl stearate, ethylene glycol monostearate, pentaerythritol (mono-, di-, tri-, or tetra -) Higher fatty acid ester lubricants such as stearate, alcohol lubricants such as cetyl alcohol, stearyl alcohol, polyethylene glycol, polyglycerol, lauric acid, myristic acid, palmitic acid, stearic acid, arachidin , Behenic acid, ricinoleic acid, magnesium such as naphthenic acid, calcium, Kadonyuumu, Baryuumu, zinc, metal soaps such as a metal salt of lead, Karuteubarou, candelilla wax, beeswax, and natural waxes such as montan wax.

  To prepare this epoxy resin composition, the epoxy resin, curing agent, and if necessary, blending components such as a curing accelerator, filler and coupling agent, colorant, leveling agent, etc., if the blending component is solid, Henschel mixer The mixture is mixed using a blender such as a Nauta mixer, kneaded at 80 to 120 ° C. using a kneader, an extruder, or a heating roll, cooled, and then pulverized to obtain a thermosetting resin composition as a powder. On the other hand, when the blending component is liquid, the blending component is uniformly dispersed using a planetary mixer or the like to obtain a thermosetting resin composition. When the viscosity of the liquid composition is high and the workability is poor, a solvent can be added to adjust the viscosity to be suitable for the work. Further, the solid composition may be used in a liquid state. In this case, the solid thermosetting resin composition obtained by the above method may be dissolved in a solvent to form a liquid. Alternatively, each compounding component may be dissolved in a solvent to form a liquid composition. The solvent used in this case is not particularly limited as long as it is usually used as a solvent. When the thermosetting resin composition thus obtained is solid, it is generally formed into a pellet and then molded by a molding machine such as a low-pressure transfer molding machine and then cured by heating to 100 to 200 ° C. In the case of a liquid, it is cured by pouring into a mold or dispensing, followed by heating to 100 to 200 ° C.

  By the way, the above-mentioned epoxy resin composition has a high glass transition point and high strength at high temperatures. In particular, the epoxy resin composition preferably has a glass transition temperature higher than the automatic ignition temperature of the gas generator, and is higher than the automatic ignition temperature of the gas generating agent loaded in the gas generator. What is in (for example, the temperature of 180 degreeC or more) is more preferable. Therefore, by forming the embolus 13 with such an epoxy resin composition, the embolus 13 does not soften even when the igniting agent 10 is ignited and the inside of the first cup 11 is in a high temperature and high pressure state, and the electrode pin 14 , 15 are less likely to jump out of the embolus 13. Moreover, even if the thickness of the embolus 13 is reduced, the strength at high temperature can be sufficiently secured, and the gas generator 1 can be reduced in size or changed without changing the size. The volume of the gas generating agent 2 filled by increasing the volume in the 2 cup 3 can be increased. Therefore, even when using a gas generating agent (green propellant) that does not contain the above-mentioned smokeless explosive and generates a small amount of toxic gas components because the gas generation efficiency is low, the gas generator is used. No need to increase the size of 1. Further, since the epoxy resin composition is excellent in adhesion to metal, in the igniter 4 of the present invention, the adhesion between the embolus 13 and the electrode pins 14 and 15 is excellent, and a seal member is provided in that portion. Need not be used. Further, in the case where the holder 5 is formed of a metal material and the holder 5 and the embolus 13 are integrally molded, the ignition powder 10 is accommodated without using a seal member between the holder 5 and the embolus 13. It is possible to prevent moisture from entering the first cup 11 as much as possible.

  In FIG. 2, in the gas generator 1 using the igniter 4 of the present invention, a shorting clip 19 for short-circuiting two electrode pins 14 and 15 is attached. The shorting clip 19 is for preventing malfunction of the igniter 4 due to static electricity or the like.

  In the gas generator 1 using the igniter 4 of the present invention, a protrusion 5 a is formed on the outer periphery of the holder 5 that holds the igniter 4, and this protrusion 5 a is related to the flange portion 3 d of the second cup 3. In combination, the second cup 3 is caulked to the holder 5. Further, a concave accommodating portion 5b for accommodating the embolus 13 and an annular protrusion 5c protruding rightward from the peripheral end portion of the accommodating portion 5b are formed on the right side portion of the holder 5, and the embolic plug is formed in the accommodating portion 5b. In a state where 13 is partially accommodated, the annular protrusion 5 c comes into contact with the tapered flange portion 12 b of the igniter case 12, and the igniter case 12 and the plug 13 are caulked to the holder 5.

  As described above, the stepped portion 13 e is formed in the embolus 13, and the accommodating portion 5 b of the holder 5 that accommodates the embolus 13 corresponds to the large diameter portion that accommodates the large diameter portion 13 b of the embolus 13. And a small-diameter accommodation hole 22 that is connected to the accommodation hole 21 and accommodates the small-diameter portion 13 c of the side wire 13. Since the thickness of the large-diameter portion 13b of the embolus 13 is reduced due to the formation of the stepped portion 13e in the embolus 13, the thickness of the holder 5 at the portion engaged with the large-diameter portion 13b of the embolus 13 is reduced. The thickness can be made thicker than the thickness of the portion engaged with the small diameter portion 13c, and the strength of the holder 5 in a high pressure state when the gas generating agent 2 burns at a high temperature can be secured.

  Moreover, in the igniter of this invention, it is preferable that the support body which covers an electrode pin is not contained in the embolic part. That is, it is preferable that the embolus is integrally formed with an epoxy resin. By doing so, the number of parts can be reduced as compared with the case where the embolus is formed of a plurality of parts such as a support. Therefore, it can be expected to reduce the cost of the igniter.

  Moreover, in this invention, the small gas generator used suitably for the seatbelt pretensioner for motor vehicles can be obtained using the said igniter. The gas generator of the present invention will be described. A gas generator 1 of the present invention shown in FIG. 2 is provided with a second cup 3 filled with a gas generating agent 2 that generates gas by combustion, and is disposed inside the second cup 3 to store an ignition powder 10. The igniter 4 having the first cup 11, the igniter case 12 having the igniting hole 12 a covering the first cup, and the annular protrusion 5 c for caulking the igniter case 12 and the first cup 11. And a holder 5 to be held.

  As shown in FIGS. 2 and 4, the holder 5 is formed with two insertion holes 23 and 24 extending in parallel downward from the lower end of the accommodation hole 22, and the two insertion holes 23 and 24 include two insertion holes 23 and 24. Of the electrode pins 14, 15, the portions covered with the protruding portions 13 d of the embolus 13 are respectively inserted. Here, the area of the two insertion holes 23 and 24 is preferably small to some extent within a range in which the electrode pins 14 and 15 can be inserted, and is 1 of the cross-sectional area of the electrode pins 14 and 15 that pass through the insertion holes 23 and 24. It is preferable to set it in the range of more than 10 times and less than 10 times, and further 2 to 7 times. By configuring the holder 5 in this way, the lower end surface of the embolus 13 is received in contact with the inner end of the accommodation hole 22 of the holder 5, and the area of the insertion holes 23 and 24 through which the electrode pins 14 and 15 are inserted. Is smaller than the conventional igniter 4, the electrode pins 14, 15 are prevented from coming out of the holder 5 and jumping out. Furthermore, when the plug 13 is provided with the protrusion 13d, the static electricity flows during the electrical test even though the distance between the electrode pins 14 and 15 and the holder 5 is close in the insertion holes 23 and 24. In addition, by discharging between the parts of the electrode pins 14 and 15 where no explosives and ignition powder exist and the insertion holes 23 and 24 of the holder 5, static electricity is released, and discharge that causes the explosive and ignition powder to ignite is prevented. be able to.

  The holder 5 can be formed of, for example, a metal material such as aluminum, iron, and stainless steel. However, since the insertion holes 23 and 24 and the receiving holes 21 and 22 are necessary, the holder 5 can be easily formed. It is particularly preferable to form with aluminum.

  The gas generating agent 2 is filled so as to be in direct contact with the inner periphery of the second cup case 3 without passing through a filter or / and a coolant. Here, the gas generating agent that can be used is preferably a nitrogen-containing organic compound as a fuel component, an inorganic compound as an oxidizing agent component, and a gas generating agent containing at least one or more additives. Examples of the fuel component include at least one selected from the group consisting of aminotetrazole, guanidine nitrate, and nitroguanidine. Examples of the oxidizing agent component include at least one selected from the group consisting of strontium nitrate, ammonium nitrate, potassium nitrate, ammonium perchlorate, and potassium perchlorate. Examples of the additive include molybdenum trioxide which is a self-igniting catalyst. In addition, examples of the additive that can be added to the gas generating agent include a binder, and the binder includes at least one selected from the group consisting of guar gum, methyl cellulose, carboxymethyl cellulose, water-soluble cellulose ether, and polyethylene glycol. Can be mentioned. Suitable gas generating agents include 5-aminotetrazole and guanidine nitrate as fuel components, strontium nitrate and ammonium perchlorate as oxidant components, molybdenum trioxide as a self-igniting catalyst, and guar gum as a binder. is there. More preferably, 5-aminotetrazole as a fuel component is 10 to 30% by mass, guanidine nitrate is 15 to 35% by mass, strontium nitrate is 10 to 30% by mass as an oxidant component, and ammonium perchlorate is 15 to 35%. A gas generating agent containing 1 to 10% by mass of molybdenum trioxide as a self-igniting catalyst and 1 to 10% by mass of guar gum as a binder. Since the gas generating agent used in the present invention is in a form that can be filled in a seat belt pretensioner or the like, it can be formed into a molded body having a desired shape, for example. The shape of the molded body is not particularly limited, and the gas generating agent includes (a) a cationic binder of 0.25% to 5%, (b) an anionic binder of 0.25% to 5%, and (c). A cylindrical molded body obtained by adding water or an organic solvent and mixing uniformly according to the type of fuel, (d) oxidizing agent, (e) combustion control agent, etc., kneading, extrusion molding, and cutting. A pellet-like molded body obtained using a tableting machine or the like can be obtained.

  The second cup 3 includes a large-diameter cylindrical portion 3a and a bottomed cylindrical portion 3b having two planar side surfaces that are connected to the right end of the cylindrical portion 3a and are parallel to each other. As shown in FIG. 3, six cutout portions 3c are formed radially from the center on the bottom surface of the bottomed cylindrical portion 3b. When the gas generating agent 2 in the second cup 3 burns to generate a high-temperature and high-pressure gas, the notch 3c is broken by the pressure of the gas, and the gas is directly supplied to a seat belt pretensioner (not shown). Released. At the end of the second cup 3 on the opening side (lower side in FIG. 2), a flange portion 3d for attachment to the holder 5 described later is formed. Examples of the material for forming the second cup 3 include metal materials such as stainless steel, iron, and aluminum.

  Next, the operation and effect of the gas generator 1 described above will be described. When a collision sensor (not shown) detects an automobile collision, the two electrode pins 14 and 15 are energized. Then, the resistance heating element 16 connected to the electrode pins 14 and 15 generates heat, and the ignition ball 17 is ignited. The ignition powder 17 is ignited and burned by the ignition ball 17. And with the combustion of the ignition powder 10, the inside of the 1st cup 11 of the igniter 4 will be in a high temperature and high pressure state. Here, since the first cup 11 is covered and reinforced by the igniter case 12 as shown in FIG. 2, the first cup 11 expands and breaks before the ignition powder 10 sufficiently burns. Is prevented. Further, since the two electrode pins 14 and 15 are individually inserted into the two insertion holes 23 and 24 having a small area formed in the holder 5, the inside of the first cup 11 is also in a high temperature and high pressure state. The two electrode pins 14 and 15 are unlikely to come out of the holder 5 and jump out to the outside.

  When combustion of the ignition powder 10 progresses and the inside of the first cup 11 reaches a high temperature and a predetermined high pressure, a high temperature and high pressure flame is immediately applied to the gas generating agent 2 in the second cup 3 through the igniter 11a and the igniter hole 12a. The gas generating agent 2 is ignited by being ejected. Since the igniter case 12 is fixed by caulking to the holder 5, it is not blown off to the gas generating agent 2 side.

  Subsequently, the gas generating agent 2 burns and the gas instantaneously generated in the second cup 3 causes the pressure of the second cup 3 to rapidly increase, and the notch 3c formed in the second cup 3 Breaking, high temperature and high pressure gas is directly introduced into a seat belt pretensioner (not shown), and the seat belt pretensioner is activated.

  In the igniter 4 of the present embodiment having the above-described configuration, since the embolus 13 is formed of a thermosetting resin composition, the embolus 13 is not softened at a high temperature, and the strength of the embolus 13 at a high temperature is increased. Since the embolus 13 is not softened in the state, the electrode pins 14 and 15 can be prevented from coming off the embolus 13. Moreover, even if the thickness of the embolus 13 is reduced, the strength required to prevent the electrode pins 14 and 15 from jumping out can be ensured, and the igniter 4 can be reduced in size by making the embolus 13 thinner. . Alternatively, it is possible to increase the filling amount of the gas generating agent 2 by increasing the volume in the second cup 3. Furthermore, since the epoxy resin composition has good adhesion to the metal, moisture can be prevented from entering the first cup 11 from between the electrode pins 14 and 15 and the embolus 13, and the moisture resistance is improved. Excellent. Moreover, since the electrode pins 14 and 15 are integrally formed of the epoxy resin composition, a support is not required, and the sealing performance between the embolus 13 and the electrode pins 14 and 15 can be increased. The number of parts of the igniter 4 can be reduced.

  In particular, when the thermosetting resin composition is an epoxy resin composition, it contains an epoxy resin having a high glass transition point and a curing agent. When 13 is assembled to the gas generator 1, the adhesion between the embolus 13 and the electrode pins 14 and 15 is improved, and moisture can more reliably enter the cup filled with the gas generating agent. This is preferable.

  Furthermore, since a stepped portion 13e is formed at the end of the embolus 13 on the holder 5 side so that the diameter on the holder 5 side is reduced, the diameter on the holder 5 side is increased with the stepped portion 13e as a boundary. Therefore, the thickness of the portion of the holder 5 that engages with the large diameter portion 13b of the embolus 13 can be made thicker than the thickness of the portion that engages with the small diameter portion 13c. As a result, the strength of the holder 5 in a high temperature and high pressure state when the gas generating agent 2 is ignited can be sufficiently secured.

  According to the gas generator 1 of the present embodiment having the above-described configuration, the two electrode pins 14 and 15 are inserted into the two insertion holes 23 and 24 having a small area formed in the holder 5, respectively. Even when 10 is burned and the inside of the second cup 3 is in a high temperature and high pressure state, most of the end face of the embolus 13 comes into contact with the holder 5 and is reliably received, and the two electrode pins 14, 15. Is difficult to come out of the holder 5 and jump out. In addition, since the distance between the electrode pins 14 and 15 and the holder 5 is close in the insertion holes 23 and 24, when static electricity flows during the electrical test, the electrode pins 14 and 15 in which no explosive or ignition powder exists. By discharging between this part and the insertion holes 23 and 24 of the holder, it is possible to release static electricity and prevent discharge that causes the explosives and ignition powder to ignite.

  Further, the base portions of the electrode pins 14 and 15 extending from the embolus 13 are covered with protrusions 13d and 13g formed integrally with the embolus 13, and the protrusions 13d and 13g are inserted into the insertion holes 23 and 24. Has been. Therefore, when the electrode pins 14 and 15 are individually inserted into the insertion holes 23 and 24, the protrusions 13d and 13g are fitted to the insertion holes 23 and 24, and the embolus 13 is not rattled. While being able to reduce, insulation between each electrode pin 14 and 15 and the holder 5 can be taken reliably.

  In addition, since the area of the two insertion holes 23 and 24 is more than 1 and less than or equal to 10 times the cross-sectional area of the electrode pins 14 and 15, the electrode pins 14 and 15 can be connected to each other even if a metal is used for the holder 5. Even if the resin embolus forming the squib is softened when ignited in a high temperature state, the electrode pins 14 and 15 jump out of the holder 5 by this hole. Is prevented.

  Further, since a sealing material for sealing between the holder 5 and the embolus 13 is provided in the vicinity of the stepped portion 13e, the second portion in which the ignition powder 10 is sealed from between the holder 5 and the embolus 13 is provided. It is possible to reliably prevent moisture from entering the cup 3. Furthermore, it is preferable that the holder part is formed of a metal material and the holder part and the embolus 13 are integrally formed of an epoxy resin composition because the adhesion between the metal part and the resin part is good, and a sealing material is unnecessary.

  In the embodiment described above, the holder 5 and the embolus 13 having the electrode pins 14 and 15 are configured as separate parts. However, the holder 5 and the electrode pins 14 and 15 are integrally formed of an epoxy resin composition. It may be molded. In this case, the number of parts can be reduced, and the manufacturing cost can be reduced.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Example 1 of igniter used in the present invention Example 1
The embolizer of the igniter according to the present invention is prepared by mixing an epoxy resin composition {bisphenol A type epoxy resin and a curing agent (4-methylhexahydrophthalic anhydride), trade name: KAYATORON ML-6650N manufactured by Nippon Kayaku Co., Ltd.}. Then, it was poured into a mold and cured by so-called casting. This embolus has a metal pin. When molding, first, a mold release agent is sprinkled on the mold, and then the metal pin is inserted into the mold. Next, a resin composition is prepared. At this time, the epoxy resin is heated to about 80 ° C. and the curing agent is heated to about 60 ° C. in advance. These are weighed at a ratio of 100: 100, mixed and stirred well. When agitation is performed, a large amount of bubbles are generated in the liquid epoxy resin composition in which the bisphenol A type epoxy resin and the curing agent are mixed. Therefore, the vacuum defoaming machine is used for about 10 to 15 minutes at 70 to 80 ° C. Defoaming is performed, and a mold with a metal pin in between is preheated. When defoaming is completed, the liquid epoxy resin composition is transferred to a syringe, and while being heated to about 50 ° C. with a heater, it is poured into a mold with a dispenser. After the injection is completed, defoaming is performed again, and after placing in a high temperature furnace at 100 ° C. for 3 hours, it is placed in a high temperature furnace at 140 ° C. for 3 hours and cured. When the epoxy resin composition is cured by this, the mold is taken out from the high temperature furnace, and the molded plug is removed from the mold. If burrs have occurred after removing the embolus, remove it completely. In this way, the embolus is completed, and resistance welding of the resistance heating element and molding of the ignition ball are performed as necessary for each experiment, and the igniter used in the present invention is completed by attaching the cup containing the ignition powder. .

Embodiment 2 of the gas generator of the present invention
An igniter case is assembled to the plug of the igniter obtained in Example 1, and this is assembled to an aluminum holder coated with a sealant. And the smokeless explosive which is a gas generating agent was loaded in the 2nd cup, and this was obtained by caulking with the holder which assembled | attached the said igniter.

  A flame test, a pressure resistance test, and a moisture resistance test were performed using the gas generator of the present invention, and the effect of the gas generator of the present invention was confirmed. In each test, the gas generator of the present invention uses a material of the igniter embolus formed of an epoxy resin composition, and the gas generator shown in FIG. 6 to be compared with the ignition shown in FIG. The material of the vessel plug was prepared as a PBT resin (polybutylene terephthalate) and as a unsaturated polyester. The components of the gas generant used in each test included nitroguanidine, ammonium perchlorate, strontium nitrate, binder, and kaolin.

Flame test example 1
First, the flame test will be described. In the test, a cylindrical jig having an inner volume of about 10 cc provided with a gas discharge hole having a diameter of 1 mm at the bottom and a propane burner for heating the jig were used. The gas generator is inserted inside the jig. In the flame test, a jig was set on a table, and a propane burner was set immediately below. At this time, the distance from the tip of the propane burner flame opening to the bottom of the jig was set to 400 mm, and the flame height by the propane burner was set to 600 mm visually. This flame test was conducted until the gas generating agent was ignited and gas was generated after heating was started with a propane burner. In the test, there was an explosion sound, which confirmed the ignition. Table 1 shows the specifications of the gas generator used in the flame test and the results thereof.

  According to Table 1, in the gas generator assembled with an igniter having a plug formed of PBT resin, the PBT resin member did not break when the smokeless explosive was 1000 mg, but when the smokeless explosive was 1100 mg and 1200 mg, the PBT resin member Destroyed. In addition, in the gas generator assembled with an igniter having a plug formed of unsaturated polyester, the unsaturated polyester member was not destroyed when the smokeless explosive was 1000 mg, 1100 mg, or 1200 mg. In the gas generator of the present invention in which an igniter having a plug formed of an epoxy resin composition was assembled, the epoxy resin member did not break when the smokeless explosive was 1000 mg, 1100 mg, or 1200 mg. Therefore, in the flame test, the gas generator assembled with the igniter of the present invention having a plug formed of an epoxy resin composition or an unsaturated polyester is a gas generator assembled with an igniter having a plug formed of PBT resin. It has been found that it is advantageous in strength at higher temperatures than the generator.

Pressure test example 2
Next, the pressure resistance test will be described. In this test, three types of gas generators were prepared. One is a gas generator in which an igniter having a plug formed of PBT resin, which has been conventionally used, is assembled to a holder and a cup body is caulked. Another one was that the plug of the igniter according to the present invention was molded as described above, the igniter case was assembled, and this was assembled to an aluminum holder coated with a sealing agent, and then the cup body was caulked. It is a gas generator. The other is a gas generator in which an igniter having a plug formed of unsaturated polyester is assembled to a holder and a cup body is caulked. None of the gas generators is loaded with a gas generating agent. A pressure resistance test was performed using these gas generators. In the pressure resistance test, a gas generator is set in a jig having an internal volume of 3.5 cc, oil is filled in the jig, hydraulic pressure is applied, and the pressure when the gas generator is broken is measured. Table 2 shows the results obtained in this pressure test.

  As can be seen from Table 2, in the conventional gas generator assembled with an igniter having a plug formed of PBT resin, the resin member was destroyed at 150 MPa. However, the gas generator of the present invention assembled with an igniter having a plug formed of an epoxy resin composition applied pressure up to 189 MPa, but the resin member did not break. Further, the gas generator of the present invention assembled with an igniter having a plug formed of unsaturated polyester was pressurized to 185 MPa, but the resin member was not destroyed. The length of the resin member is a length 3 in which the gas generator having the igniter of the present invention having a plug of 2.9 mm in length formed of an epoxy resin composition and an unsaturated polyester is molded of PBT resin. Although it was shorter by 0.7 mm each than the gas generator having a conventional igniter having a .6 mm embolus, it showed a high value in strength. Therefore, the gas generator of the present invention in which an igniter having a plug formed of an epoxy resin composition or an unsaturated polyester is assembled is a gas in which a conventional igniter having a plug formed of PBT resin is assembled. It has been found that there is a strength advantage over the generator.

Moisture resistance test example 3
Furthermore, the moisture resistance test is described. In this test, three types of gas generators were prepared. One is a gas generator in which an igniter having a plug formed of PBT resin that has been used in the past is assembled to a holder through an O-ring, and a gas generating agent is loaded into the cup body and caulked by the holder. is there. Another one is a gas generator according to the present invention in which a holder and an electrode pin are integrally molded with an epoxy resin composition, and a gas generating agent is loaded into a cup body and caulked by a holder. The other is a gas generator in which a holder and an electrode pin are integrally formed of unsaturated polyester and a cup is loaded with a gas generating agent and caulked with a holder. The loading amount of the gas generating agent was 1 g. A moisture resistance test was conducted using these three types of gas generators. The test conditions at that time were set to a temperature of 85 ° C. and a humidity of 85%, and the test time was set to 410 hours. And after taking out a sample from an environmental testing machine, the gas generating agent was taken out from the gas generator, and the moisture absorption amount was measured. Table 3 shows the test results obtained in this test.

  As can be seen from Table 3, in the conventional O-ring seal structure, the moisture absorption amount of the gas generating agent was 0.41% when it was put in an atmosphere of 85 ° C. and 85% for 410 hours. The sealing structure by adhesion of the composition was 0.16%. Moreover, it was 0.53% in the sealing structure by adhesion | attachment of unsaturated polyester. Therefore, the gas generator of the present invention having a sealed structure in which the holder and the electrode pin are bonded by the epoxy resin composition is 2.6 times more hygroscopic than the conventional gas generator having a sealed structure using an O-ring. It turns out that it is superior. Further, the gas generator of the present invention having a seal structure in which the holder and the electrode pin are bonded by the epoxy resin composition is more resistant to moisture absorption than the gas generator having a seal structure in which the holder and the electrode pin are bonded by the epoxy resin composition. It was found that it is 3.3 times or more superior in performance.

It is sectional drawing of the igniter used by this invention. It is the III-III sectional view taken on the line of FIG. It is sectional drawing of the gas generator which concerns on embodiment of this invention. It is the figure seen from the bottom part of the 2nd cup in the gas generator of Drawing 2. It is the VI-VI sectional view taken on the line of FIG. It is sectional drawing of the conventional igniter. It is sectional drawing of the conventional gas generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas generator 2 Gas generating agent 3 2nd cup 3a Cylindrical part 3b Bottomed cylinder part 3c Notch part 3d Flange part 4 Igniter 5 Holder 5a Protrusion 5b Storage part 5c Annular protrusion 10 Igniting agent 11 1st cup 11a Induction Part 11b Engagement part 12 Igniter case 12a Fire conduction hole 12b Flange part 13 Plug 13b Large diameter part 13c Small diameter part 13a Insertion part 13e Stepped part 13d Projection part 13f Transition part 14 Electrode pin 15 Electrode pin 16 Resistance heating element 17 Ignition Ball 18 Gasket 19 Shorting clip 21 Housing hole 22 Housing hole 23 Insertion hole 24 Insertion hole

As the coupling agent, such as 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyl an ethyl dimethoxysilane, 3-glycidoxypropyl methyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltri Methoxysilane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxy Silane, vinyltrimethoxysilane, N- (2- (vinylbenzylamino) ethyl) 3-aminopropyltrimethoxysilane hydrochloride, 3-methacryloxypropyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyl Silane coupling agents such as limethoxysilane, isopropyl (N-ethylaminoethylamino) titanate, isopropyl triisostearoyl titanate, titanium di (dioctyl pyrophosphate) oxyacetate, tetraisopropyl di (dioctyl phosphite) titanate, neo Titanium coupling agents such as alkoxytri (p-N- (β-aminoethyl) aminophenyl) titanate, Zr-acetylacetonate, Zr-methacrylate, Zr-propionate, neoalkoxyzirconate, neoalkoxytrisneodecanoyl Zirconate, Neoalkoxytris (dodecanoyl) benzenesulfonyl zirconate, Neoalkoxytris (ethylenediaminoethyl) zirconate, Neoalkoxytri Zirconium (m-aminophenyl) zirconate, ammonium zirconium carbonate, Al-acetylacetonate, Al-methacrylate, Al-propionate, and other zirconium and aluminum coupling agents can be mentioned, and silicon coupling agents are preferred. By using a coupling agent, a cured product having excellent moisture resistance reliability and little decrease in adhesive strength after moisture absorption can be obtained.

As can be seen from Table 3, in the conventional O-ring seal structure, the moisture absorption amount of the gas generating agent was 0.41% when it was put in an atmosphere of 85 ° C. and 85% for 410 hours. The sealing structure by adhesion of the composition was 0.16%. Moreover, it was 0.53% in the sealing structure by adhesion | attachment of unsaturated polyester. Therefore, the gas generator of the present invention having a sealed structure in which the holder and the electrode pin are bonded by the epoxy resin composition is 2.6 times more hygroscopic than the conventional gas generator having a sealed structure using an O-ring. It turns out that it is superior. Further, the gas generator of the present invention having a seal structure in which the holder and the electrode pin are bonded by the epoxy resin composition is more resistant to moisture absorption than the gas generator having a seal structure in which the holder and the electrode pin are bonded by the unsaturated polyester. It was found to be 3.3 times or more superior.

Claims (23)

  Ignition having a resistance heating element, an explosive that is ignited by heat generation of the resistance heating element, an electrode pin connected to the resistance heating element, and a plug that holds the electrode pin, and sealing a contact interface between the electrode pin and the plug An igniter characterized in that a material of the embolus is a thermosetting resin.   The igniter according to claim 1, wherein the thermosetting resin excludes unsaturated polyester.   The igniter according to claim 1, wherein the thermosetting resin is an epoxy resin composition.   The igniter according to claim 3, wherein the epoxy resin composition includes an epoxy resin and a curing agent.   The igniter according to claim 3, wherein the epoxy resin composition contains 30 to 95% by weight of filler based on the total epoxy resin composition.   The igniter according to claim 5, wherein the filler includes at least one of fused silica, crystalline silica, aluminum oxide, and calcium carbonate.   The epoxy resin includes at least one of a bisphenol type epoxy resin, a novolac type epoxy resin, a biphenyl type epoxy resin, a naphthalene type epoxy resin, an alicyclic epoxy resin, and an amine type epoxy resin. The igniter described.   The igniter according to claim 4, wherein the curing agent includes at least one of a phenol novolac resin, an acid anhydride, and amines.   The igniter according to claim 4, wherein the epoxy resin composition includes a curing accelerator.   2. The igniter according to claim 1, further comprising a small-diameter stepped portion on a side portion of the electrode pin of the embolus. A cup filled with a gas generating agent that generates gas by combustion, an igniter disposed inside the cup, and a holder for holding the igniter and the cup;
The igniter is a gas generator having a resistance heating element, a gunpowder that is ignited by heat generation of the resistance heating element, an electrode pin connected to the resistance heating element, and a plug that holds the electrode pin,
The material of the embolus is a thermosetting resin,
A gas generator comprising an insertion hole through which the electrode pin is individually inserted into the holder.   12. Each root portion of the electrode pin extending from the embolus is covered with a protrusion formed integrally with the embolus, and the protrusion is inserted into the insertion through hole. The gas generator described.   The gas generator according to claim 11, further comprising a small-diameter stepped portion on an electrode pin side portion of the embolus.   The gas generator according to claim 11, wherein the thermosetting resin excludes unsaturated polyester.   The gas generator according to claim 11, wherein the thermosetting resin is an epoxy resin composition.   The gas generator according to claim 15, wherein the epoxy resin composition contains an epoxy resin and a curing agent.   The gas generator according to claim 15, wherein the epoxy resin composition contains 30 to 95% by weight of filler based on the total epoxy resin composition.   The gas generator according to claim 17, wherein the filler includes at least one of fused silica, crystalline silica, aluminum oxide, and calcium carbonate.   The epoxy resin includes at least one of a bisphenol type epoxy resin, a novolac type epoxy resin, a biphenyl type epoxy resin, a naphthalene type epoxy resin, an alicyclic epoxy resin, and an amine epoxy resin. The gas generator described.   The gas generator according to claim 16, wherein the curing agent includes at least one of a phenol novolac resin, an acid anhydride, and amines.   The gas generator according to claim 15, wherein the epoxy resin composition includes a curing accelerator.   The gas generator according to claim 11, wherein an area of the insertion hole is more than 1 time and less than or equal to 10 times a cross-sectional area of the electrode pin. The gas generator according to claim 13, further comprising a sealing material that seals between the holder and the embolus in the vicinity of the stepped portion.

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