JP2016088824A - Smoke screen source generating agent composition and smoke screen generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a smoke screen source generating agent composition capable of being used for a smoke screen generator of a crime prevention device.SOLUTION: There is provided a smoke screen source generating agent composition used in a smoke screen generator containing 20 to 80 mass% of a first smoke screen source generating agent and 80 to 20 mass% of a second smoke screen source generating agent, the first smoke screen source generating agent contains fuel and oxidant and has burning temperature of 2300°C or more and linear combustion speed of 20 mm/sec or more and the second smoke screen source generating agent contains fuel and oxidant and has burning temperature of 1900°C or less and linear combustion speed of 15 mm/sec or less.SELECTED DRAWING: None

Description

  The present invention relates to a smoke screen source generator composition and a smoke screen generator using the same.

  Smoke generators on the ceiling and walls of the room, etc., for the purpose of ensuring the time to capture people who have illegally entered stores and houses by visually blocking the escape route and causing mental confusion. May be attached.

  Patent Document 1 describes a device for a crime prevention smoke screen device, which requires a gas tank filled with high-pressure gas, and carbon dioxide is exemplified as the gas.

Patent Literature 2 describes a smoke screen generating device including an ignition device and a smoke generating agent. As the smoke generating agent, a composition formed of zinc oxide, ammonium perchlorate, vinyl chloride, and calcium carbonate into a tablet shape is described (paragraph 0020).
Vinyl chloride is considered to be a vinyl chloride resin. However, since vinyl chloride resin is considered to generate harmful chlorine gas by combustion, there is a problem in terms of safety.

Utility Model Registration No. 2500591 Japanese Patent No. 3816867

  This invention makes it a subject to provide the smoke-screen source generator composition used for the smoke-screen generator suitable as an object for crime prevention apparatuses, and a smoke-screen generator using the same.

The present invention is a smoke source generator composition for use in a smoke generator comprising 20 to 80% by mass of a first smoke source generator and 80 to 20% by mass of a second smoke source generator,
The first smoke screen source generator contains fuel and oxidant, has a combustion temperature of 2300 ° C or higher, and a linear combustion rate of 20 mm / sec or higher.
There is provided a smoke screen source generator composition, wherein the second smoke screen source generator comprises a fuel and an oxidant, and has a combustion temperature of 1900 ° C. or lower and a linear combustion rate of 15 mm / sec or lower.

The smoke screen source generator composition of the present invention combines two smoke screen source generators having different combustion temperatures and combustion speeds, so that it is effective when used as a smoke screen generator of a security device. Parts damage, operating sound pressure, smoke screen spreading speed, and smoke screen generation amount can be exhibited in a well-balanced manner.
For this reason, the smoke screen generator using the smoke screen source generator composition of the present invention is suitable for a security device.

The axial sectional view of the smoke generator using the smoke screen source generator composition of the present invention. The axial sectional view of the smoke screen generator of another embodiment using the smoke screen source generator composition of the present invention.

<Smoke Screen Source Generator Composition>
The smoke screen source generator composition of the present invention comprises a first smoke screen source generator and a second smoke screen source generator and is used in a smoke screen generator.
When used in a smoke screen generator, the smoke screen source generator composition of the present invention is combusted to generate a hot gas and a smoke screen source. The hot gas acts to cause the smoke screen source to be ejected and diffused from the smoke screen generator, and the smoke screen source changes to smoke when released from the smoke screen generator into the room.

The first smoke screen source generating agent has a combustion temperature of 2300 ° C. or higher and a linear combustion rate of 20 mm / sec or higher.
The combustion temperature of the first smoke screen source generating agent is preferably 2300 to 3000 ° C, more preferably 2350 to 2900 ° C.
The burning rate of the first smoke screen source generating agent is preferably 20 to 50 mm / sec, and more preferably 25 to 40 mm / sec.

The first smoke screen source generator contains a fuel and an oxidant, and further contains a binder and other additives as necessary.
The first smoke screen source generator contains a fuel and an oxidizer, and is powdery when it does not contain a binder, and when it contains a fuel, an oxidizer and a binder, it has a desired shape such as a granule, a cylinder, or a disk. Can be in the body.

As the fuel, one selected from nitrocellulose, nitroguanidine, guanidine nitrate, dicyandiamide, melamine, melamine cyanurate, 5-aminotetrazole, and 5,5′-bistetrazole diammonium salt can be used. Those containing nitroguanidine are preferred.
When combining nitroguanidine with other fuels, the content of nitroguanidine is preferably 50% by mass or more, and more preferably 60% by mass or more.

Oxidizing agents are chlorates such as potassium chlorate and sodium chlorate, strontium perchlorate, magnesium perchlorate, ammonium perchlorate, potassium perchlorate, perchlorate such as sodium perchlorate, strontium nitrate Those selected from nitrates such as potassium nitrate and sodium nitrate can be used. Among them, those containing perchlorate are preferable, and those containing potassium perchlorate are particularly preferable.
When combining potassium perchlorate with another oxidizing agent, the content of potassium perchlorate is preferably 50% by mass or more, and more preferably 60% by mass or more. Here, as other oxidizing agents, potassium nitrate and potassium chlorate are preferable.
The oxidant instantly burns fuel and oxidant to generate a large amount of gas (nitrogen gas and gas containing carbon dioxide), and the oxidant itself changes to generate a smoke screen source.
For example, potassium chlorate or potassium perchlorate is a powder of potassium chloride and serves as a smoke screen source, and potassium nitrate is a powder of potassium oxide, potassium carbonate (reacts with carbon dioxide in the gas) and serves as a smoke screen source. .

  Well-known boron nitrate (boron and potassium nitrate) can also be used as the first smoke screen source generator.

  As the binder, those selected from guar gum, sodium carboxymethyl cellulose (CMCNa), ethyl cellulose, polyvinyl pyrrolidone, polyacrylamide, starch and dextrin can be used, and among these, CMCNa and ethyl cellulose are preferable.

The other additive is used for the purpose of adjusting the combustion speed and the combustion temperature, for purifying the combustion gas, and the like, and is a gas generating composition used in a known gas generator for an air bag device. The thing similar to a thing can be used.
Other additives include cupric oxide, iron oxide, zinc oxide, cobalt oxide, manganese oxide, molybdenum oxide, nickel oxide, bismuth oxide, silica, alumina and other metal oxides; aluminum hydroxide, magnesium hydroxide, Metal hydroxides such as cobalt hydroxide and iron hydroxide; cobalt carbonate, calcium carbonate; complex compounds of metal oxides or hydroxides such as acid clay, kaolin, talc, bentonite, diatomaceous earth, hydrotalcite; silicic acid Examples thereof include metal acid salts such as sodium, mica molybdate, cobalt molybdate, and ammonium molybdate; molybdenum disulfide, calcium stearate, silicon nitride, silicon carbide, metaboric acid, boric acid, and boric anhydride.

When the first smoke screen source is composed of a fuel and an oxidant (excluding boron nitrate), the fuel is preferably 20 to 70% by mass and 30 to 80% by mass of oxidant, 30 to 60% by mass of fuel, What is 40-70 mass% of oxidizing agents is more preferable.
In addition, the first smoke screen source generating agent is preferably 10 to 30% by mass of fuel and 90 to 70% by mass of oxidant when the fuel and oxidant are made of boron nitrate, and 15 to 25% by mass of fuel and oxidized What is 85-75 mass% of an agent is more preferable.
When the first smoke screen source generator contains a binder, the amount is preferably 3 to 15 parts by mass with respect to 100 parts by mass in total of the fuel and the oxidant.
When the first smoke screen source generator is composed of the same components, the combustion temperature and the combustion rate can be adjusted by changing the content ratio of the oxidant and controlling the oxygen balance. The combustion temperature and the combustion rate can also be adjusted by adding an additive. For example, the combustion temperature and the combustion rate can be adjusted by blending a metal hydroxide such as aluminum hydroxide, a metal oxide such as acidic clay, or a complex compound of hydroxide.

The second smoke screen source generating agent has a combustion temperature of 1900 ° C. or lower and a linear combustion rate of 15 mm / sec or lower.
The combustion temperature of the second smoke screen source generating agent is preferably 900 to 1900 ° C, more preferably 950 to 1850 ° C.
The burning rate of the second smoke screen source generating agent is preferably 5 to 15 mm / sec, and more preferably 7 to 13 mm / sec.

The second smoke screen source generator contains a fuel and an oxidizing agent, and further contains a binder and other additives as necessary.
The second smoke screen source generator contains a fuel and an oxidizer, and is powdery when it does not contain a binder, and when it contains a fuel, an oxidizer and a binder, it has a desired shape such as a granule, a cylinder, or a disk. Can be in the body.

The fuel can be selected from sucrose, silicone oil, and tripotassium citrate (monohydrate). Among these, sucrose is used alone, or sucrose and other combustion are used in combination. It is preferable to do.
When sucrose and tripotassium citrate (monohydrate) are combined as another fuel, the sucrose content is preferably 50% by mass or more.
When sucrose and silicone oil are combined as another fuel, the sucrose content is preferably 60% by mass or more, and more preferably 70% by mass or more.
The oxidizing agent functions in the same manner as the oxidizing agent of the first smoke screen source generator, and nitrates can be used, and among these, potassium nitrate is preferable.
The same binder as the first smoke screen source generator can be used, but ethyl cellulose is preferred.
Moreover, the same additive as a 1st smoke-screen source generator can be used as needed.

When the second smoke screen source is composed of a fuel and an oxidant, it is preferably 20 to 70% by mass of fuel and 30 to 80% by mass of oxidant, 30 to 60% by mass of fuel, and 40 to 70% by mass of oxidant. % Is more preferable.
When the second smoke screen source generator contains a binder, the amount is preferably 0.5 to 5 parts by mass with respect to 100 parts by mass in total of the fuel and the oxidant.
When the second smoke screen source generator is composed of the same components, the combustion temperature and the combustion rate can be adjusted by changing the content ratio of the oxidant and controlling the oxygen balance. Further, the combustion temperature and the combustion speed can be adjusted by adding an additive in the same manner as the first smoke screen source generator.

The smoke screen source generating composition of the present invention comprises 20 to 80% by mass of the first smoke screen source generating agent and 80 to 20% by mass of the second smoke screen source generating agent.
Since the first smoke screen source generating agent has a higher combustion temperature and combustion speed than the second smoke screen source generating agent, the ignitability is good, and if it is the same amount, combustion can be continued for a longer time.
When the smoke screen source generator composition of the present invention is formed into a molded product having a desired shape, a method for molding a gas generating agent used in a known gas generator (for example, paragraph number 0035 of JP-A-11-92265) is used. Can be manufactured using.
The smoke screen source generator composition of the present invention preferably contains 30 to 70% by mass of the first smoke screen source generator and 70 to 30% by mass of the second smoke source generator. However, when the composition is in the above ratio, boron nitrate is not included as the fuel and oxidant of the first smoke screen source generator.
When the first smoke screen source is made of boron nitrate, the content ratio of the first smoke screen source is 20-30% by mass, and the content of the second smoke source generator is 70-80% by mass. Is preferred.

<Smoke screen generator in FIG. 1>
A smoke screen generator 1 according to an embodiment will be described with reference to FIG.
The smoke screen generator 1 shown in FIG. 1 can have the same basic structure as the pyrotechnic gas generator used in the airbag apparatus.

The housing 11 is obtained by welding and integrating a diffuser shell 12 and a closure shell 13 at a joint portion.
The diffuser shell 12 has a plurality of smoke screen source discharge ports 14 on the side wall surface.
The plurality of smoke screen source outlets 14 are closed from the inside by a moisture-proof seal tape 15.
In addition to the shape shown in FIG. 1, the housing may have a cylindrical shape that is widely used in known gas generators.

An inner cylinder member 20 is disposed at a position surrounding the central axis X of the housing 11.
As for the inner cylinder member 20, the 1st end part 21 is located in the top-plate surface 12a side, and the 2nd end part 22 is located in the bottom-plate part 13a side. The contact portion between the second end portion 22 and the bottom plate portion 13a is welded.
The inner cylinder member 20 has a plurality of heat transfer holes 24 in the circumferential direction at the peripheral wall portion 23. The heat transfer hole 24 is closed with a seal tape 25 from the outside.

The inside of the inner cylinder member 20 is an ignition means chamber 30.
In the ignition means chamber 30, an electric igniter 31 is attached from the bottom plate portion 13a side.
A transfer charge (transfer charge container) 35 filled in an aluminum container or the like is disposed on the top plate 12 a side in the ignition means chamber 30.
The charge transfer agent 35 is in contact with the ignition part 32 of the electric igniter 31.
Note that the smoke screen source generating composition (the first smoke screen source generating agent 42 and the second smoke screen source generating agent 43) may be ignited only by the igniter 31 without using the transfer agent 35.

The outside of the inner cylinder member 20 is a combustion chamber 40, and the combustion chamber 40 and the ignition means chamber 30 are separated by the inner cylinder member 20 before operation.
The combustion chamber 40 is filled with a smoke screen source generating composition comprising a combination of a columnar first smoke screen source generating agent 42 and a disk-shaped second smoke screen source generating agent 43. In FIG. 1, different shapes are used so that the difference between the first smoke screen source generating agent 42 and the second smoke screen source generating agent 43 is easily understood, but the same shape may be used.
The first smoke screen source generating agent 42 and the second smoke screen source generating agent 43 are filled in a premixed state.
An annular retainer 45 is disposed on the bottom plate portion 13 a side of the combustion chamber 40. The annular retainer 45 is for adjusting the capacity of the combustion chamber 40 by moving the position in the direction of the central axis X in accordance with the filling amount of the smoke screen source generator composition.

A cylindrical coolant material 45 is disposed outside the combustion chamber 40 with a gap 50 between the smoke screen source outlet 14.
The cylindrical coolant material 45 is for cooling when a high-temperature smoke screen source and high-temperature gas pass.
The cylindrical coolant material 45 preferably has a smaller bulk density than the coolant or filter used in a known gas generator in order to pass the smoke screen source.
A positioning member 46 is disposed between the cylindrical coolant material 45 and the inner cylinder member 20.

The smoke screen generator 1 can use a smoke generating agent in addition to the smoke screen source generating composition as required.
When a smoke generating agent is used, it is preferable to adjust the amount used so as not to impair the effect of using the smoke screen source generating composition.
The smoke generating agent can be filled in the combustion chamber 40, or can be filled in a separate container attached at a position in contact with the hot smoke source and the hot gas discharged from the smoke source discharge port 14.

As the smoke generating agent, those selected from the first component paraffin wax, microcrystalline wax, polyethylene glycol and the second component metal carbonate (hydrate), metal hydride, metal hydroxide are preferable.
The smoke generating agent may be selected from the first component, may be selected from the second component, or may be a combination of those selected from the first component and the second component.
The first component is vaporized (change in state) by heat during operation to become a gas (smoke screen source), and the gas is cooled to form droplets and further cooled to powder to form a smoke screen. In addition to being able to disperse smoke screens at a uniform concentration in the space that diffuses by vaporization, they can be diffused over a wide range.
The second component reacts (thermally decomposes) with heat during operation, changes to oxide (oxide powder) and water (water vapor) (smoke screen source), and then the oxide powder scatters to form a smoke screen. The water vapor is cooled to form droplets and a smoke screen. Therefore, the smoke screen component is supplied not only from the oxide powder but also from water vapor, and a dense smoke screen can be generated.

It is preferable to combine a material selected from the first component and the second component as the smoke generating agent because different smoke screen sources can be generated, so that the concentration of the smoke screen and the ejection amount can be increased.
Since the first component and the second component can each generate a sufficient smoke screen source, even when the first component and the second component are used in combination, their ratio is particularly limited. It is not a thing.

<Smoke screen generator in FIG. 2>
A smoke screen generator 10 according to another embodiment will be described with reference to FIG.
The smoke screen generator 10 of FIG. 2 is substantially the same as the smoke screen generator 1 of FIG. 1 except that the filling method of the first smoke screen source generator 42 and the second smoke screen source generator 43 is different.
The smoke screen generator 10 of FIG. 2 is filled with a first smoke screen source generating agent 42 and a second smoke screen source generating agent 43 separated into two layers.

In FIG. 2, the combustion chamber 40 is divided into two in the vertical direction in the direction of the axis X by a retainer 55 extending in the radial direction, and the first smoke screen source is generated in the upper space close to the plurality of heat transfer holes 24. The agent 42 is filled, and the second smoke screen source generating agent 43 is filled in the lower space away from the plurality of fire transfer holes 24.
The retainer 55 has a plurality of through holes 56 and is disposed so that an annular gap is formed between the retainer 45 and the cylindrical coolant material 45. It is communicated. In place of the retainer 55, the first smoke screen source generating agent 42 and the second smoke screen source generating agent 43 may be separated and filled with a donut-shaped aluminum foil.
In the smoke screen generator 10 shown in FIG. 2, the first smoke screen source generating agent 42 and the second smoke screen source generating agent 43 are filled in two layers in a state of being in contact with each other without using the retainer 55. Also good. That is, the two layers are that the first smoke screen source generator 42 and the second smoke screen source generator 43 are not mixed and exist as independent smoke screen source generators.
Further, in the smoke screen generator 10 shown in FIG. 2, from the top plate portion 12 a to the bottom plate portion 13 a in the vicinity of the plurality of heat transfer holes 24 in the combustion chamber 40, from the inner cylinder member 20 to the cylindrical coolant material 45. Even if the first smoke screen source generating agent 42 is filled in the space up to half the length of the space, and the remaining space (the space in contact with the cylindrical coolant material 45) is filled with the second smoke screen source generating agent 43. Good.

  The smoke screen generator 10 shown in FIG. 2 is filled with a first smoke screen source generating agent 42 that is more easily ignited and combusted at a position close to the plurality of fire transfer holes 24 in the combustion chamber 40. After the source generating agent 42 is ignited and combusted, the second smoke screen source generating agent 43 is ignited and combusted.

Next, a usage method when the smoke screen generator 1 shown in FIG. 1 is combined with a sensor or the like to form a security device will be described.
The security device includes an operating system that can operate the igniter 31 by sending a command to the smoke screen generator 1 when the sensor detects an illegal intruder in the building.
When the smoke screen generator 1 is used as a security device, it is attached using a holder or the like as necessary so that the bottom plate portion 13a side becomes the ceiling surface side or the wall surface side.
The igniter 31 of the smoke screen generator 1 is connected to an external power source (including a battery).

The igniter 31 is actuated by the command from the sensor that detects the intruder's entry into the room, and the transfer charge 35 in the ignition means chamber 30 is ignited to generate a flame or the like.
The generated flame or the like breaks the seal tape 25 that closes the heat transfer hole 24 and flows into the combustion chamber 40, where the smoke screen source generating composition (the first smoke screen source generating agent 42 and the second smoke screen source generating agent 43 The mixture is ignited and burned.
At this time, since the first smoke screen source generating agent 42 has better ignitability than the second smoke screen source generating agent 43, the first smoke screen source generating agent 42 ignites first, and the second smoke screen source generating agent 43 is delayed. Ignite.
By this ignition combustion, a smoke screen source and high-temperature gas are generated in the combustion chamber 40, and at this time, a combustion sound (explosive sound) is also generated.
The smoke screen source and the high-temperature gas are cooled by passing through the coolant 45, then flow into the gap 50, break the seal tape 15, and are discharged into the room through the discharge port 14.
The hot gas acts to cause the smoke screen source to be ejected and diffused, and the diffused smoke screen source is cooled in the room and quickly produces a smoke screen.
Through such an operation process, the above-described combustion noise threatens the trespasser, and even if the view of the trespasser is blocked by the smoke screen diffused in the room, it can cause psychological confusion. Enhanced.

  The smoke screen generator of the present invention can be installed indoors and used as a security device. When used as a security device, for example, it can be used in combination with a sensor, a control device, a power source, etc. that can detect an illegal intruder indoors, and can also be used in combination with a remote control system.

Examples and Comparative Examples Smoke source generator compositions comprising the following granular first smoke source generator and granular second smoke source generator were prepared.

<First smoke screen source generator>
(1) Composition A1
Nitroguanidine / potassium perchlorate / CMC-Na = 50.51 / 44.49 / 5.00 (mass%), combustion temperature = 2534 ° C, linear combustion rate = 34 mm / sec
(2) Composition A2
Nitroguanidine / strontium nitrate / potassium perchlorate / CMC-Na / acid clay = 38.05 / 20.38 / 30.57 / 10.00 / 1.00 (mass%), combustion temperature = 2237 ° C., linear burning rate = 26 mm / sec
(3) Composition A3
Boron / potassium nitrate / ethyl cellulose = 20.00 / 79.00 / 1.00 (mass%), combustion temperature = 2852 ° C., linear burning rate = 40 mm / sec

<Second smoke screen source generator>
(1) Composition B1
Sucrose / potassium nitrate = 40.00 / 60.00 (mass%), combustion temperature = 1206 ° C, linear combustion rate = 9mm / sec
(2) Composition B2
Sucrose / potassium nitrate / ethyl cellulose = 38.00 / 60.00 / 2.00 (mass%), combustion temperature = 1176 ° C., linear burning rate = 9 mm / sec
(3) Composition B3
Sucrose / potassium nitrate / ethyl cellulose = 23.00 / 75.00 / 2.00 (mass%), combustion temperature = 1835 ° C., linear burning rate = 11 mm / sec
(4) Composition B4
Sucrose / tripotassium citrate (monohydrate) / potassium nitrate / ethylcellulose = 24.00 / 24.00 / 50.00 / 2.00 (mass%), combustion temperature = 1147 ° C., linear burning rate = 10 mm / sec
(5) Composition B5
Sucrose / silicone oil / potassium nitrate = 27.00 / 10.00 / 63.00 (mass%), combustion temperature = 1272 ° C, linear burning rate = 12mm / sec
(6) Composition B6
Sucrose / silicone oil / potassium nitrate / ethyl cellulose = 34.20 / 9.90 / 54.10 / 1.80 (mass%), combustion temperature = 982 ° C., linear burning rate = 10 mm / sec

<Calculation method of combustion temperature>
The burning rate was theoretically calculated using a thermochemical equilibrium calculation simulation program.

<Measuring method of linear burning rate>
The linear burning rate was obtained by the following method.
Each raw material was weighed with a predetermined composition and mixed thoroughly by passing it through a 300 μm sieve three times.
After that, the amount calculated so that the strand length after forming the mixture becomes 12.7 mm is filled into the mortar side of a predetermined mold, and compressed with a hydraulic pump from the heel side end face at a pressure of 14.7 MPa for 10 seconds. Held.
Thereafter, the cylindrical strand having an outer diameter of 9.6 mm was obtained by taking out from the mold, dried at 80 ° C. for 16 hours, and subjected to a restriction for preventing side combustion, and used as a sample for measuring the linear burning rate. .
The wire burning rate was calculated by igniting the end face by energizing a nichrome wire under a pressure of 7 MPa under a nitrogen atmosphere, and dividing the strand length (mm) by the combustion completion time (sec).

<Measurement of combustion internal pressure>
A test vessel provided with a first smoke screen source generator and a second smoke screen source generator in the amounts shown in Table 1, an electric ignition device, and a flame jet prevention filter (having the same shape as the cylindrical coolant 45 in FIG. 1). (The inner volume was about 80 cm ³ and the nozzle diameter was 3.5 × 40), and the ignition device was operated at room temperature (20 ° C.) to burn the first and second smoke source generators.
In Example 3, as shown in FIG. 2, the first smoke screen source generating agent and the second smoke screen source generating agent were filled in two layers in the axis X direction (the retainer 55 is not used). In the remaining examples, as shown in FIG. 1, the first and second smoke source generators were mixed.
The internal pressure of the test container during combustion was measured by a sensor.
The smoke screen generator in the embodiment of the present invention is designed with a container pressure resistance of 30 MPa or more so as not to cause harm to the criminal due to the destruction of the container during operation. Since the safety factor of the container pressure resistance (= designed container pressure resistance / internal pressure during combustion (measured value)) is preferably not less than 1.5, the internal pressure is required not to exceed 20 MPa.

<Internal parts damage>
After the test for measuring the internal combustion pressure, the test container was disassembled, and the presence or absence of deformation of the external appearance of the internal components (flame jet prevention filter) was confirmed visually.
If the filter for preventing flame ejection is greatly deformed, a flame or a high-temperature gas with insufficient cooling may be discharged from the smoke screen generator, which may cause a fire.

<Operating sound pressure>
When measuring the combustion internal pressure, the sound pressure at a position 10 m away from the test container was measured with a sound pressure meter.
When a smoke screen generator with a measured value of 80 to 120 dB is used as a security device, there is a sufficient threatening effect by sound.
When a smoke screen generator with a measured value of less than 80 dB is used as a crime prevention device, the threatening effect of sound is small.
When a smoke screen generator with a measured value of more than 120 dB is used as a security device, there is an excessive intimidating effect due to the sound, but there is a possibility that the body of an illegal intruder may be adversely affected by excessive sound.

<Smoke diffusion speed>
The ceiling of the test chamber of 30 m ³ having a transparent window for viewing the side face (vertical 6 m × horizontal 2.5 m × height 2m), was attached to the same test vessel and measurement of the combustion pressure.
The arrival time (visual observation) of the smoke screen to the transparent window when the test container was operated in this state was measured.

<Amount of combustion residue>
After the test for measuring the internal combustion pressure, the test vessel was disassembled and the amount of internal combustion residue (unburned residue) was measured. The greater the amount of combustion residue inside, the smaller the amount of generated smoke screen (the amount of smoke screen).

  The smoke generator (test container) using the smoke source generator composition of the examples is effective as a safety device as well as a security device, as well as to confuse and threaten illegal intruders. It was equipped with a good balance of internal component damage, operating sound pressure, smoke screen spreading speed, and smoke screen generation.

DESCRIPTION OF SYMBOLS 1, 10 Smoke generator 11 Housing 31 Igniter 40 Combustion chamber 42 1st smoke-screen source generating agent 43 2nd smoke-screen source generating agent

Claims (11)

A smoke source generator composition for use in a smoke generator, comprising 20 to 80% by mass of a first smoke source generator and 80 to 20% by mass of a second smoke source generator,
The first smoke screen source generator contains fuel and oxidant, has a combustion temperature of 2300 ° C or higher, and a linear combustion rate of 20 mm / sec or higher.
A smoke screen source generator composition, wherein the second smoke screen source generator comprises a fuel and an oxidant, and has a combustion temperature of 1900 ° C or lower and a linear combustion rate of 15 mm / sec or lower.   The smoke screen source generator composition according to claim 1, wherein the content ratio of the first smoke screen source generator is 30 to 70 mass% and the content ratio of the second smoke screen source generator is 70 to 30 mass%.   The smoke screen source generator composition according to claim 1 or 2, wherein the first smoke screen source generator contains nitroguanidine as a fuel and potassium perchlorate as an oxidant.   The second smoke screen source generator contains one selected from sucrose, silicone oil, and tripotassium citrate (monohydrate) as the fuel, and contains potassium nitrate as the oxidant. A smoke screen source generator composition.   The first smoke screen source generating agent is made of boron nitrate, the content ratio of the first smoke screen source generating agent is 20 to 30% by mass, and the content ratio of the second smoke screen source generating agent is 80 to 70% by mass. Item 3. The smoke screen source generator composition according to Item 1 or 2.   The smoke screen source generator composition according to any one of claims 1 to 5, wherein at least one of the first smoke screen source generator and the second smoke screen source generator contains a binder.   A smoke screen generator in which the ignition means and the smoke screen source generating composition according to any one of claims 1 to 6 are housed in a housing having a smoke screen source discharge port. In the housing, an ignition means chamber is disposed inside, a combustion chamber is disposed outside the ignition means chamber, and the ignition means chamber and the combustion chamber are separated by an inner cylinder member,
The smoke screen generator according to claim 7, wherein the smoke screen source generator composition is contained in the combustion chamber. In the housing, an ignition means chamber is disposed inside, a combustion chamber is disposed outside the ignition means chamber, and the ignition means chamber and the combustion chamber are separated by an inner cylinder member,
The smoke screen source generating composition is contained in the combustion chamber;
The smoke screen generator according to claim 7, further comprising a cylindrical coolant disposed outside the combustion chamber with a clearance from the smoke screen source discharge port.   10. The smoke screen source generating composition according to claim 7, wherein the first smoke screen source generating agent and the second smoke screen source generating agent are mixed and accommodated in the combustion chamber. Smoke generator.   10. The smoke screen source generating composition according to any one of claims 7 to 9, wherein the first smoke screen source generating agent and the second smoke screen source generating agent are contained in two layers separated in the combustion chamber. The smoke screen generator described in 1.

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