JPH0377410B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention is a method of bringing a smoke generating agent into contact with a smoke generating agent such as a signal smoke generating agent, an insecticide, or a sterilizing smoke agent, which generates smoke through combustion or decomposition, and generating smoke by the heat generated by the smoke generating agent. The present invention relates to a igniter for a smoke generating agent that heats the generating agent and causes it to burn or decompose, and a method for manufacturing the same. (Prior Art) There are various methods for generating fumes such as smoke generating agents and fumigants. For example, methods that utilize heating with an electric heater, heat generated by combustion of metal powder and metal oxide, heat generated by adding water to quicklime, heat generated by contact with alkali metal sulfide and air;
Furthermore, as the simplest and cheapest igniter, a method is known in which a thick paperboard is impregnated with potassium nitrate and the heat generated by its combustion is utilized. (Problems to be Solved by the Invention) However, in the methods that utilize heating by electric heaters, heat generated by combustion of metal powder and metal oxide, and heat generated by adding water to quicklime, the structure of the igniter is generally complicated and expensive. Furthermore, in the case of the above-mentioned methods other than electric heaters, it was necessary to pay attention to moisture-proofing measures during the manufacturing process and before use.
In addition, in the case of a igniter made of thick paperboard impregnated with potassium nitrate, there is a drawback that the combustion propagation interface often separates and falls off, resulting in unsustainable combustion. Therefore, it was necessary to use two or three sheets of paperboard together. However, when two or three sheets of paperboard are used together, the amount of potassium nitrate impregnated varies, so if potassium nitrate is added, intense flames may be generated from the mating surfaces of the paperboards, and the flames can cause smoke to form. The drawback was that even the ingredients burned, making it impossible to achieve the intended purpose. (Means for Solving the Problems) The present invention is based on a method of impregnating paperboard with nitrates, etc., and aims to eliminate the drawbacks of the above-mentioned prior art and provide an inexpensive igniter for a fume generator. As a result of various studies aimed at this purpose, it was discovered that a combustible material immersed in an aqueous solution containing nitrates and water glass in a specific ratio and dried maintains stable combustibility after ignition, thus completing the present invention. That is, the igniter for a fume generating agent of the present invention has the following features:
It is characterized by being made of a vegetable fiber combustible material impregnated with nitrate and water glass. The manufacturing method is as follows: 100 parts by weight of water, 10 parts by weight of nitrate.
A vegetable fibrous combustible material is immersed in an aqueous solution prepared by dissolving ~50 parts by weight of nitrate and 20 to 60% by weight of water glass based on the nitrate, and then dried. It is characterized by impregnating nitrate and the water glass. Examples of the nitrate used in the present invention include potassium nitrate, sodium nitrate, ammonium nitrate, strontium nitrate, and lead nitrate. The optimal vegetable fiber combustible material used in the present invention is paper, cotton, hemp, recycled fibers, etc., which burn stably with nitrates.The form is not specified, but in the case of paper, it is plate-shaped. Or cylindrical, cotton, linen, etc.
In the case of recycled fibers, readily available rope-shaped fibers are suitable. The concentration of the aqueous solution of nitrate used in the present invention is 100%
It is preferably 10 to 50 parts by weight, and if it is less than 10 parts by weight, the flammability will be low, and if it exceeds 50 parts by weight, the flammability will hardly change. In addition, the amount of water glass used is preferably 20 to 60% by weight based on nitrate; if it is less than 20% by weight, the combustion suppressing effect of waterglass will be low, and if it exceeds 60% by weight, The combustion suppressing effect of the glass increases and fire extinguishment occurs midway through. (Examples, Comparative Examples, and Usage Examples) Next, the present invention will be described with reference to Examples, Comparative Examples, and Usage Examples. Examples 1 to 10 Table 1 A vegetable fibrous combustible material was immersed for 20 minutes in an aqueous solution of nitrate and water glass having the composition (parts by weight) shown in each example. Then 60
The mixture was dried at a temperature of 100° C. for more than 1 hour, ignited using a matchstick, and the combustion time and combustion conditions were observed. The combustion time and combustion conditions are shown in Table 1. Comparative Examples 1 to 5 A vegetable fibrous combustible material was added to a solution containing nitrates having the formulation composition (parts by weight) shown in each comparative example in Table 1.
Soaked for 20 minutes. Thereafter, drying and ignition were carried out in the same manner as in Examples 1 to 10, and the combustion time and combustion conditions were observed. The combustion time and combustion conditions are shown in Table 1.

【table】

[Table] As can be seen from Table 1 above, igniters impregnated only with nitrates may extinguish the fire midway through, generate flames, or as the concentration of nitrates increases, the combustion residue crumbles and cannot be used for heating. I know it's not good. In contrast, the igniter of the present invention, which is impregnated with nitrate and water glass within the prescribed range of ingredients, does not significantly change the flammability even if the concentration of nitrate and water glass changes slightly, and does not generate flame. It can be seen that the combustion residue also maintains the initial state of the combustible material, indicating stable combustion performance. Usage Example 1 As shown in Figure 1, a smoke generating agent 2 consisting of 16% by weight of lactose, 31% by weight of potassium chlorate, 53% by weight of auramine, and 5% by weight of rubber liquid is stored in a metal container 1. A lid 4 with a spout hole 3 was attached, and the igniter 5 of Example 4 was inserted. Next, the upper end of the igniter 5 was ignited using a commercially available matchstick, and smoke generation was observed. As a result of testing 10 products, all showed good smoke generation. Usage Example 2 As shown in Figure 2, 50% by weight of tetrachloroisophthalonitrile, 23% by weight of potassium chlorate, 5% by weight of potassium nitrate, 10% by weight of starch, carboxylic An insecticidal smoke agent 7 consisting of 5% by weight of methyl cellulose and 7% by weight of diatomaceous earth was placed therein, and the igniter 9 of Example 5 was inserted. Next, the tip of the igniter 9 was ignited using a commercially available matchstick, and smoke generation was observed. As a result of testing 10 products, all showed good smoke generation. Usage example 3 Example 9 is applied to the same smoke generating agent and smoke generating device as usage example 1.
The fire was ignited using a torch and the smoke was observed. As a result of testing 10 products, all showed good smoke generation. Usage example 4 Comparative example 3 was added to the same smoke generating agent and smoke generating device as usage example 2.
The fire was ignited using a matchstick and the smoke was observed. As a result of testing 10 pieces, 3 pieces showed good smoke generation, but the remaining 7 pieces only emitted smoke in the initial stage, and the flame from the igniter ignited the smoke and continued the flame state until the reaction of the smoke agent was completed, and It did not show the desired smoke generation effect. (Effects of the Invention) As is clear from the above examples and usage examples, the igniter for a fume generating agent of the present invention is easy to manufacture, does not extinguish during use, and does not generate flame. It is useful because it shows stable combustion performance and can safely and reliably heat the fume generator.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of use example 1 according to the present invention, and FIG. 2 is a schematic cross-sectional view of use example 2 according to the present invention. DESCRIPTION OF SYMBOLS 1...Metal container, 2...Fume generator, 5, 9...Lighter according to the present invention, 6...Aluminum bag, 7...Insecticidal smoke agent.

Claims (1)

[Claims] 1. An igniter for a smoke generator, characterized in that it is made by impregnating a vegetable fiber combustible material with nitrate and water glass. 2 After immersing the vegetable fibrous combustible material in an aqueous solution prepared by dissolving 10 to 50 parts by weight of nitrate in 100 parts by weight of water and 20 to 60% by weight of water glass based on the nitrate, dry it. and impregnating the vegetable fiber combustible material with the nitrate and the water glass.