JP6655326B2 - Power source gas for gas gun - Google Patents

Description

  The present invention relates to a power source gas for a gas gun used as a pressure source for the gas gun.

  The simulated gun is known as a gun having no human killing ability, and includes an electric gun, a gas gun, an air cocking gun, and the like, and each of them is widely used in various fields. Of these, the gas gun is sometimes called an airsoft gun, but it does not use air as a pressure source, and the main component of the gas (power source gas) serving as a pressure source is HFC134a gas known as a propellant for aerosol. It is.

  HFC134a gas is a kind of hydrofluorocarbon having a chemical name of 1,1,1,2-tetrafluoroethane and has been developed as a substitute for CFC. Therefore, the impact on global warming is significantly reduced as compared with CFCs. However, in recent years, there has been a demand for a power source gas for a gas gun to use a gas composition having a smaller global warming potential (GWP).

  Accordingly, the applicant company has been developing to provide a power source gas having a small global warming potential (GWP). When the prior art was investigated, JP-A-2011-184585 was found as an invention relating to a propellant composition. In the same invention, the propellant filled in the spray can or the gas gun for play consists of a mixed gas of 1234ze and R32, and the weight ratio of the 1234ze is 70 to 95% and the GWP is 200 or less. It is described as being characterized.

  Although the invention according to the above prior art aims at providing a propellant composition which is an alternative to R134a from the viewpoint of preventing global warming, it is still considered insufficient. That is, the global warming potential (GWP) is an index indicating the warming ability based on carbon dioxide, and the numerical value of GWP of 200 or less shown in the prior art is compared with the GWP of HFC134a of 1430. is decreasing. However, if the GWP is 200, it must be said that it is far from the ultimate target of zero emission.

JP 2011-184585 A

  The present invention has been made in view of the above points, and an object of the present invention is to reduce the global warming potential (GWP) to a minimum and to minimize the reduction in performance as a gas gun. It is. Further, another object of the present invention is to hardly adversely affect the material such as plastic or rubber constituting the gas gun, is also slightly flammable than other gases, and has higher safety. The purpose is to provide a power source gas for a gas gun.

  In order to solve the above-mentioned problems, the present invention provides a gas composition used as a pressure source of a gas gun, which mainly comprises HFO-1234ze- (E) (trans-1,3,3,3-tetrafluoropropene). Further, a means for containing a slight amount of a pressurizing agent is adopted.

Trans-1,3,3,3-tetrafluoropropene (hereinafter abbreviated as HFO-1234ze), which is a main component of the present invention, is a safety data sheet issued by the Japan Fluorocarbon Association (SDS, created July 22, 2010). According to the last revision on April 1, 2015), it is a nonflammable gas, and has physical and chemical properties such as appearance: liquefied gas, color: colorless, and ignition point: 288-293 ° C. There is no danger in the hazard information, and the environmental impact information is as shown in the global warming potential (100-year integrated value with CO ₂ as 1.0) <1 (IPCC Fifth Report 2013). Has been described.

By using HFO-1234ze having the above characteristics as the main component of the gas in the present invention, the possibility of keeping the global warming potential (GWP) within the range of the subject is enhanced. On the other hand, according to the place where the experiment was repeated, the HFO-1234ze alone, also became clear that not span the vaporization pressure, such as coming were HFC134a and HFC152a + CO ₂ that uses far. When the vaporization pressure is insufficient, problems such as a decrease in the flight distance and trajectory characteristics of the bullet occur, and the smoothness of the blowback that simulates the impact of firing tends to be impaired.

For this reason, the inventor searched for a measure to increase the vaporization pressure of HFO-1234ze to the same level as the vaporization pressure of HFC134a. An intensive experiment was conducted on the selection and mixing ratio. The type of gas used for the mixing was varied, and the one that achieved the immediate purpose was found, but there were not a few problems. For example, carbon dioxide (CO ₂ ) has no problem in satisfying the target vaporization pressure, but has a problem that it escapes from packing or the like due to small molecules and cannot maintain a mixed state with HFO-1234ze. Thus, for example, by taking measures to prevent the escape of CO ₂ , this can also be used as a component of the power source gas according to the present invention. Furthermore, since it is known that nitrogen gas also functions as a pressurizing agent, it can be said that this is also a kind of usable gas.

As a result of the trial and error as described above, it was found that the most preferable pressurizing agent as the power source gas according to the present invention was propane (C ₃ H ₈ ). Propane is about twice as expensive as CO ₂ , and the mixed gas also tends to be slightly flammable, but does not attack plastic or rubber, and can be pressurized to near the vaporization pressure of HFC134a by mixing with HFO-1234ze. There is no escape.

  The mixing ratio by mass ratio of HFO-1234ze- (E) (trans-1,3,3,3-tetrafluoropropene) is 90% or more and less than 99.5%, and the range of the pressure increasing agent composed of propane is appropriate. . If the HFO-1234ze is less than 90%, the vaporization pressure tends to increase too much because propane exceeds 10%, and if it exceeds 99.5%, the vaporization pressure becomes 0.5% because propane becomes 0.5%. Absent. A more preferable mixing ratio is HFO-1234ze- (E) (trans-1,3,3,3-tetrafluoropropene) 95.5% and propane 4.5% by mass ratio. When propane is 4.5%, the balance between the boosting effect and problems such as flammability is well-balanced. When propane exceeds 4.5%, the boosting effect increases, but also considers the flammability problem. Need arises.

  On the other hand, looking at the global warming potential (GWP), that of HFO-1234ze is <1 as described above, whereas that of propane is 3. Since the mixing ratio of propane to HFO-1234ze in the present invention is at most 10% by mass, the global warming potential (GWP) of the power source gas for a gas gun according to the present invention is not different from that of HFO-1234ze. Therefore, it can be said that <1 is almost zero, and is reduced to the limit.

  The power source gas for a gas gun according to the present invention is composed of 95.5% by mass ratio of HFO-1234ze- (E) (trans-1,3,3,3-tetrafluoropropene) and 4.5% by weight of propane. Power source gas, which is filled in a container and supplied in the form of an aerosol product. By satisfying this configuration, it is possible to provide a power source gas for a gas gun in a can, in which the vaporization pressure and the economy are appropriately maintained and the non-flammability is also maintained.

  As described above, the present invention has an effect that the global warming potential (GWP) can be reduced to near the limit and the performance of the gas gun can be minimized. Further, according to the present invention, there is almost no adverse effect on the material such as plastic or rubber constituting the gas gun, and it is slightly flammable than other gases and has higher safety. A power source gas can be provided.

  Hereinafter, the present invention will be described in more detail based on embodiments. The power source gas for a gas gun according to the present invention is a gas composition used as a pressure source of a gas gun as described above, and includes HFO-1234ze- (E) (trans-1,3,3,3-tetrafluoropropene). ) As a main component and a small amount of a pressurizing agent.

  In this embodiment, the power source gas for a gas gun is composed of 90% or more and less than 99.5% of HFO-1234ze- (E) (trans-1,3,3,3-tetrafluoropropene) by mass, and the balance being propane. . Hereinafter, Examples are shown together with Comparative Examples.

<Example 1>

<Example 2>

<Comparative example>

<Pressure measurement>

<Compatibility>
The compatibility was good at an HFO-1234ze / propane filling ratio of 95.5% / 4.5%. When tested in the range of propane 2 to 20%, the compatibility was all good.
・ Consideration When the aerosol was prototyped with the above HFO-1234ze / propane filling ratio of 95.5% / 4.5% and the pressure was measured, the vaporization pressure equivalent to that of the aerosol prototyped similarly using HFC134a was obtained. It was confirmed. In the High Pressure Gas Safety Law, a mixed gas of HFO-1234ze / propane filling ratio of 95.5% / 4.5% is regarded as an aerosol, so that the pressure at 35 ° C. must be less than 0.80 MPa as measured by aerosol. . Therefore, in Example 2 in which propane is 10%, the pressure exceeds the above-mentioned condition, but in other respects, the object of the present invention is satisfied.

Various experiments were conducted by filling the gas gun with the power source gas of the above embodiment. Therefore, experimental results are shown for the bullet flight distance. The used guns and bullets are as follows.
Gun: Handgun type gas gun bullet made by applicant company: BB bullet made by applicant company, diameter 6.0 mm, average weight 0.2 gr

表１−１によれば、比較的低温の条件において弾丸飛翔距離は従来のガスと比較して１０％程度の低下することが分かる。 <Table 1-1> Temperature 10 ℃

According to Table 1-1, under relatively low temperature conditions, the bullet flight distance is reduced by about 10% as compared with the conventional gas.

表１−２によれば、温度の上昇と共に弾丸飛翔距離が延びるとともに、従来のガスに対する比率の低下は５％程度に減少することが分かる。 <Table 1-2> Temperature 20 ℃

According to Table 1-2, it can be seen that the bullet flight distance increases with an increase in temperature, and the decrease in the ratio to the conventional gas decreases to about 5%.

表１−３によれば、温度の上昇と共に弾丸飛翔距離が順調に延び、かつ、従来のガスに対する比率の低下も３％程度にまで減少することが分かる。 <Table 1-3> Temperature 40 ℃

According to Table 1-3, it can be seen that the bullet flight distance increases steadily as the temperature rises, and the decrease in the ratio to the conventional gas also decreases to about 3%.

In addition, experimental results for different types of guns are shown. The used guns and bullets are as follows.
Gun: Shotgun-type gas gun manufactured by the applicant company This gas gun is a gun that can fire three or six bullets at the same time, but the experiment was carried out by selecting three shots. The bullet used was the same as above, BB bullet made by the applicant company, diameter 6.0 mm, average weight 0.2 gr.

表２−１によれば、３発発射型の場合、比較的低温の条件における弾丸飛翔距離は従来のガスと比較して２０％程度近くまで低下することが分かる。 <Table 2-1> Temperature 10 ° C

According to Table 2-1, in the case of the three-shot type, the bullet flight distance under relatively low temperature conditions is reduced to about 20% as compared with the conventional gas.

表２−２によれば、温度の上昇と共に弾丸飛翔距離が延びるとともに、従来のガスに対する比率の低下は１０％超程度に減少することが分かる。 <Table 2-2> Temperature 20 ° C

According to Table 2-2, it can be seen that the bullet flight distance increases with an increase in temperature, and the decrease in the ratio to the conventional gas decreases to about 10% or more.

表２−３によれば、温度の上昇と共に弾丸飛翔距離が著しく延び、かつ、従来のガスに対する比率の低下もなくなることが分かる。 <Table 2-3> Temperature 40 ℃

According to Table 2-3, it can be seen that the flying distance of the bullet significantly increases with an increase in the temperature, and that the ratio to the conventional gas does not decrease.

  From the above experimental results, the power source gas for a gas gun according to the present invention obtains a sufficient projectile distance compared with the conventionally used HFC134a gas (1,1,1,2-tetrafluoroethane). We can see that we can do it. In addition, the decrease in the flight distance is less than 20% at the maximum, and if this difference is such a difference, for example, the hop-up function that changes the flight distance by rotating the BB bullet by increasing or decreasing the amount of gas emitted from the gas gun body. This is a range that can be compensated by adjustment or the like. Therefore, the power source gas for a gas gun according to the present invention exerts the same effect as the conventional HFC134a gas in a gas gun in the performance such as the flying distance of a bullet and blowback operation, and the gas source according to the present invention. The global warming potential (GWP) of the power source gas is <1 as described above, and has decreased to the limit. As described above, according to the present invention, there is provided a power source gas for a gas gun which is completely replaced with a conventional power source gas and sufficiently copes with the problem of global warming.

Claims (2)

A gas composition used as a pressure source for a gas gun,
When the gas composition is used as a pressure source for a gas gun, the flight distance at a temperature of 10 ° C. is less than 20% lower than that of the conventional HFC134a gas, so that the flight distance is reduced by a mass ratio of HFO-1234ze. -(E) (trans-1,3,3,3-tetrafluoropropene) a power source gas for gas guns comprising 95.5% and propane 4.5%. The power source gas for a gas gun according to claim 1, wherein the power source gas for a gas gun is filled in a container and supplied as an aerosol product.