JPH0694411B2 - Insect repellent fiber - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insect repellent fiber using a vitreous substance containing B ₂ O ₃ and having an excellent insect repellent effect against mites and the like.

[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. Insect-proof fibers in which these substances are carried on fibers are also known, for example, from Japanese Patent Application Laid-Open No. 1-148206. 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 provide an insect-repellent fiber having little toxicity and 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 gist is insect-repellent fiber, 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 for incorporating the above-mentioned vitreous substance into the fiber. For example, the vitreous substance is mixed as a fine powder with, for example, an acrylic binder and attached to the fiber surface by a method such as spraying or dipping. Or
In the case of synthetic fiber, there is a method of kneading it into the fiber from the beginning.

[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

[Acaricidal test 1] Samples used in the test B ₂ O ₃ 60 mol%, SiO ₂ 20 mol%, Na ₂ O 10 mol%, Ca
A fine powder of 10 mol% O 2 pulverized to a particle size of 20 μm or less (however, the elution rate of B ₂ O ₃ at 20 ° C. for 1 hour is 2 mg / g) is mixed with a urethane binder. by dipping the cotton therein were attached respectively vitreous material on the surface of the cotton fabric fibers at a rate of 0.05 g / m ² and 5 g / m ^2. A part of the cotton cloth thus obtained was cut and used as a sample. Test method The test method was carried out by the test method (medium contact method) of the Osaka Prefectural Institute of Public Health, which mutatis mutandis applies the method of Quasi-drug Qualification Standard designated 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, the animals without the sample spread were 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. Insect killing rate (%) = [(number of mites in control plot-number of mites in treatment plot))
/ Number of mites in control group] The test was carried out in three groups and one group. Test results The insecticidal rate of each sample is 10% for the sample with 0.05g / m ² of vitreous material and 99% for the sample with 5g / m ² of vitreous material.
%Met.

[Acaricide Test 2] Sample used for the test B ₂ O ₃ 80 mol%, SiO ₂ 10 mol%, Na ₂ O 10 mol% fine powder of vitreous substance (however, condition of 20 ° C. for 1 hour) Below
A B ₂ O ₃ elution rate of 300 mg / g) was kneaded into a fiber raw material at a rate of 3% under the conditions shown in Table 1 to form fibers, and a non-woven fabric having a basis weight of 60 g / m ² was produced. Numbers 1 to 6 correspond to the examples of the present invention, and number 7 is a comparative example containing no glass. Some of these cloths were cut into samples.

[0011]

[Table 1]

Test method The test method (medium contact method) of the Osaka Prefectural Institute of Public Health, which mutatis mutandis applies the method of quasi-drug approval standard designated by the Ministry of Health and Welfare. That is, the above sample was laid on the bottom surface of a plastic petri dish (area: 28 cm ² ) so as to be in close contact, and 0.025 g of a medium containing a mite mite was spread evenly 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. Seven days later, the total number of living mites in the petri dish was examined, and the insecticidal rate was calculated by the following formula by comparison with the number of living mites in Comparative Example. Insect killing rate (%) = [(number of mites in control plot-number of mites in treatment plot))
/ Number of mites in control group] The test was carried out in three groups and one group. Test results The insecticidal rate of each sample is as follows. Sample 1 21% Sample 2 95% Sample 3 45% Sample 4 96% Sample 5 98% Sample 6 92% Sample 70%

[0013]

INDUSTRIAL APPLICABILITY As described above, the insect repellent fiber of the present invention has a glass surface containing a vitreous substance capable of eluting B ₂ O ₃ at a rate of 1 mg / g to 300 mg / g at 20 ° C. for 1 hour. Attached to
By kneading it into the inside of the fiber, it was possible to exhibit an excellent insect repellent effect. Moreover, it has almost no toxicity as compared with the one using the conventional organic substance, and has an 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.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location D06M 23/08

Claims (1)

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