JPH0694413B2 - Insect paper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to insect repellent paper excellent in insect repellent effect against mites and the like, which uses a vitreous substance containing B ₂ O ₃ .

[0002]

2. Description of the Related Art Conventionally, for the control of mites, organic substances such as organic phosphoric acid, pyrethroid type substances, carbamate type substances, diazinon type substances, orthoboric acid, sodium borate, sodium octaborate tetrahydrate, etc. Inorganic boron compounds are used. However, since the above-mentioned organic substance having a tick-proofing effect is highly toxic, there is a concern that it may affect the human body when used in a large amount. On the other hand, the inorganic boron compound has no problem of toxicity, but has a problem that the drug effect is lost in a short period of time because it is water-soluble.

[0003]

The present invention has been completed to solve the above-mentioned conventional problems and to provide an insect repellent paper which has little toxicity and is capable of maintaining a medicinal effect for a long period of time. Is.

[0004]

The present invention, which has been made to solve the above-mentioned problems, provides a method in which B ₂ O ₃ is added at a temperature of 20 ° C. for 1 hour.
The summary is insect-proof paper, which is characterized by being treated with a vitreous substance that elutes at a rate of mg / g to 300 mg / g.

As described above, the present invention uses a vitreous substance capable of eluting B ₂ O ₃ . As a glass having such a function, B ₂ O ₃ --SiO ₂ --Na ₂ O system, B ₂ O ₃ --Na ₂ O system
-RO based, there is a _{B 2 O 3 -Na 2 O-} Al 2 O 3 system. Where RO
Means an oxide of an alkaline earth metal such as CaO or MgO. These vitreous substances elute B ₂ O ₃ which is effective in controlling mites under high temperature and high humidity conditions where mites easily proliferate, but B ₂ O ₃ is not so much produced under low temperature drying conditions that are not suitable for mites breeding. Since it does not elute, it is extremely suitable for controlling ticks.

[0006] dissolution rate of B ₂ O ₃ is a vitreous material and a particle size in distilled water at 20 ° C. for example 420 to 600 [mu] m was immersed for 1 hour, calculated as B ₂ O ₃ by weight per vitreous material 1g To be done.
However, in the present invention, the particle size is not limited to this. In the present invention, the dissolution rate of B ₂ O ₃ is 1 mg / g to 300
The reason why the mg / g is set is that if the dissolution rate is lower than this, there is no insect repellent effect, and conversely, if it is higher than this, there is no change in the insect repellent effect, which is wasted, and the dissolution is completed in a short period of time. .

Various methods can be considered to disperse the above-mentioned vitreous substance on the paper, but it is usual to mix the vitreous substance as a fine powder with a cellulosic binder and spray it on the surface of the paper. The insect-repellent paper thus obtained can be laid under a tatami mat, for example, to prevent the occurrence of mites.

[0008]

EXAMPLES The present invention will be described in more detail below with reference to examples. First, the toxicity test of the vitreous substance used in the present invention was conducted. The contents are as follows. [Toxicity test] Substances used in the test (1) Fine powder obtained by grinding a glassy substance of 80 mol% B ₂ O ₃ , 10 mol% SiO _{2 and} 10 mol% Na ₂ O to a particle size of 20 μm or less. (2) Fine powder obtained by pulverizing a glassy substance of B ₂ O ₃ 45 mol%, SiO ₂ 40 mol% and Na ₂ O 15 mol% to a particle size of 20 μm or less. Test method This is an acute toxicity test using mice. It was carried out by a method of observing abnormalities in mice by single oral administration to male and female mice in three steps with an upper limit of 5000 mg / kg. Test location Japanese Food Analysis Center Osaka Branch Test results (1) LD ₅₀ mouse 3250mg / kg (2) LD ₅₀ mouse 5000mg / kg or more Discussion This result shows that LD ₅₀ mouse of H ₃ BO ₃ (boric acid) is 3450mg /kg
(Reference value: Comprehensive data on toxicity data of chemical substances, edited by National Institute of Occupational Safety and Health, Comprehensive list), it was confirmed that the toxicity of the vitreous substance used in the present invention to mammals is extremely weak. It was

[0009] [acaricidal test 1] Sample B ₂ O ₃ 80 mol% used in the test, SiO ₂ 10 mol%, fine powder of Na ₂ O 10 mole% of the vitreous material was ground to a particle diameter equal to or less than 20 [mu] m ( However
The elution rate of B ₂ O ₃ under the condition of 20 ° C for 1 hour is 2 mg /
g) was adhered to woodfree paper as follows using a cellulosic binder to prepare a sample. a Paper on which 1 g / m ^{2 of} fine powder is attached. b Paper with 5 g / m ^{2 of} fine powder attached. c Paper on which 10 g / m ^{2 of} fine powder is attached. d Untreated paper (control section) Test method The test method was carried out by the test method (medium contact method) of the Osaka Prefectural Institute of Public Health, which is based on the quasi-drug certification standard specified by the Ministry of Health and Welfare. That is, the above sample was laid on the bottom of a plastic petri dish (area: 28 cm ² ) so as to be in close contact, and 0.025 g of a medium containing Dermatophagoides farinae was uniformly spread on the surface. The number of surviving mites in the medium is previously counted by 0.1 g by the saturated saline suspension method immediately before the start of the test. Put a saturated saline solution into each treated area of the plastic petri dish to keep the humidity at 75%.
Store in a plastic container for food storage kept at
The animals were kept in an incubator at 25 ± 1 ° C. Similarly, untreated paper was bred as a control group, and after 14 days, the total number of living mites in the petri dish was investigated, and the insecticidal rate was calculated by the following formula by comparison with the number of living mites in the control group. Insecticidal rate = [(the number of mites in the control plot-the number of mites in the treatment plot) / the number of mites in the control plot] The test was carried out in three consecutive plots. Test results As shown in Table 1 below, an excellent acaricidal effect was confirmed.

[0010]

[Table 1]

[Mite-killing test 2] Sample used in the test A sample prepared by pulverizing the following composition pulverized into particles having a particle size of 45 μm or less with a cellulose-based binder to a fine paper at 15 g / m ² per sample And a Boric acid (H ₃ BO ₃ ) for comparison b Borosilicate glass for comparison (SiO ₂ 81%, B ₂ O ₃ 12%, Na ₂ O 4%, Al ₂ O ₃ 2%, CaO
1%, above wt%) c Insect repellent glass 1 (B ₂ O ₃ 80 mol%, SiO ₂ 10 mol%, Na ₂ O 10 mol%) (B ₂ O ₃ elution rate: 300 mg / g) d Insect repellent glass 2 (B ₂ O ₃ 40 mol%, SiO ₂ 50 mol%, Na ₂ O 10 mol%) (B ₂ O ₃ elution rate: 14 mg / g) e Insect proof glass 3 (B ₂ O ₃ 80 mol%, MgO ₂ (10 mol%, Na ₂ O 10 mol%) (B ₂ O ₃ dissolution rate: 32 mg / g) Test method Same as in the acaricidal test 1. The observation was performed after 2 weeks and 4 weeks. The mite used is the Dermatophagoides farinae. Test results

[0012]

[Table 2]

[0013]

[Table 3]

[Acaricidal test 3] Using the samples of the insecticidal glass 1 and 2 used in the acaricidal test 2, the same procedure as in the acaricidal test 2 was carried out, except that the type of mites was changed to Physcomitrella patens.

[0015]

[Table 4]

[0016]

[Table 5]

[0017]

INDUSTRIAL APPLICABILITY As described above, the insect-proof paper of the present invention disperses B ₂ O ₃ at a rate of 1 mg / g to 300 mg / g at 20 ° C. for 1 hour in a dispersed manner. As a result, it was possible to exhibit an excellent insect repellent effect against mites and the like. Moreover, it has almost no toxicity as compared with the one using the conventional organic substance, and has the advantage that the drug effect can be maintained for a long period of time as compared with the one using the conventional inorganic boron compound.

Claims (1)

[Claims] 1. B ₂ O ₃ is 1 mg / g to ₃₀ at 20 ° C. for 1 hour.
An insect-repellent paper characterized by being treated with an insect-repellent substance that dissolves at a rate of 0 mg / g.