JPH06123004A - Insect-proofing material - Google Patents

Abstract

PURPOSE:To obtain the safe and effective insect-proofing and insecticidal material containing fine radioactive powder and suitable for producing carpets, etc. CONSTITUTION:This insect-proofing and insecticidal fiber or synthetic resin material is characterized by integrally kneading or coating a fiber material or synthetic resin with fine radioactive powder. The technique is applied to the piles, primary substrate and backing material of carpet, and the insect- proofing material is safe, and keeps the high effect because of using the fine radioactive resin material. The insect-proofing material further has good vashability.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present application relates to a fiber material or a synthetic resin material having excellent insect repellent and insecticidal properties.

[0002]

[Prior Art and Problems] In recent years, domestic futons, blankets,
It is considered to be an important cause of asthma and nasal allergy when a certain amount of dust mites belonging to the dust mites that live on the sofa and the like exceeds a certain amount. As a method of exterminating these mites, a method of forcibly absorbing them with an electric vacuum cleaner to exterminate them, a method of exterminating them by high-frequency heating because mites are vulnerable to high temperature drying, or a product treated with a chemical agent having insecticidal properties is used. The method of doing is proposed.

The method of sucking with an electric vacuum cleaner is not sufficient for the control of mites living inside by only controlling the mites on the surface, and in the case of high frequency heating, it is effective for futons, blankets, rugs, etc. It was difficult to use on sofas, and the effect did not last long.

When an insecticide was used, the durability of the effect was improved, but it was not yet semi-permanent, and it was not preferable in terms of safety for the human body. -2-

[0005]

DISCLOSURE OF THE INVENTION The present invention utilizes insecticidal and insecticidal powders that are effective and safe and semi-permanently persistent against harmful insects such as mites generated on bedding, rugs and furniture. The purpose is to obtain a highly insecticidal material.

[0006]

The present invention relates to a fiber or a synthetic resin material having insecticidal / insect repellent properties, and is a fiber material or a synthetic resin mixed with a slightly radioactive mineral powder (hereinafter referred to as a slightly radioactive powder)? Or, the gist is an insect-repellent material characterized by being coated and applied integrally.

The term "microradioactivity" as used in the present invention means that the range of microradiation concentration is 74 becquerels / stipulated value for the solid state of "Ionizing Radiation Hazard Prevention Regulations" of the Industrial Safety and Health Act.
It is defined as g or less. The radiation concentration in the present invention is preferably 60 becquerel / g or less. Then, the minute radiation powder in the present invention will be described.

[0008] In the granite, there are giant crystal granite (pegmatite)
There is an aggregate of crystals called quartz, feldspar, and large mica. Rare element minerals (fergusonite,
Bronzeite, monazite, zircon, etc.) have a maximum content of 0.5%, but this natural pegmatite is crushed to concentrate the rare earth element mineral to about 20% to obtain a slightly radioactive powder. .

The composition of the slightly radioactive powder can be exemplified as shown in "Table 1". -3-

[0010]

[Table 1] SiO ₂ 58.55 (%) U ₃ O ₈ 0.04 Al ₂ O ₃ 11.80 ThO ₂ 1.05 Fe ₂ O ₃ 0.43 Y ₂ O ₃ 0.52 MnO ₂ 0.10 R ₂ O ₃ * 11.52 TiO ₂ 0.06 ZrO ₂ 0.30 CaO 0.45 Nb ₂ O ₅ + Ta ₂ O ₅ 0.44 MgO 0.17 P ₂ O ₅ 5.36 K ₂ O 6.87 Ignition loss 0.50 Na ₂ O 1.84

* R is a rare earth element such as lanthanum, cerium, praseodymium, and neodymium. Thus, oxides of U, Th, other elements, and rare earth elements show effective insecticidal and insecticidal effects.

0.2 to 1 of the above slightly radioactive powder is added to synthetic fibers.
When 0% by weight is kneaded and melt-spun, an insect-controlling insecticidal fiber is obtained. Fibers such as polypropylene, nylon and polyester are suitable as the synthetic fibers. A woven fabric, a non-woven fabric, a tufted pile, a needle punched fabric, or the like is prepared by using a part or all of this fiber.

The powder used in the present invention is made of natural stone, and is 74 becquerel / g or less specified by the above-mentioned Industrial Safety and Health Law, which is safe for the human body.

The method of manufacturing the cloth of the present invention includes:
It can also be obtained by coating or spraying on the above-mentioned base cloth or raw cotton in a state of mixing 0.2 to 20% by weight of fine radioactive powder in a liquid resin such as a resin solution, emulsion or latex, and drying. -Four-

This fiber composition comprises a futon, pillow, satton,
Sofas and the like are suitable.

Further, synthetic resin foam or non-foam such as polyurethane, PVC or EVA may be coated or kneaded with 0.2 to 20% by weight of slightly radioactive powder.

In any of the embodiments, the insect-repellent and insecticidal cloth of the present invention has a semipermanent effect, is highly safe for the human body, and has no odor or irritating odor.

[0018]

【Example】

(Examples 1 and 2) Polypropylene woven fabric (weight 100 g / m ² ) as the primary base fabric, tufted carpet greige using nylon pile yarn (loop shape, pile length 3.5 mm, pile weight 600 g / m ² , 2600) 1 kg / m ² of the backing composition of "Table 2" mixed with the slightly radioactive powder used in the present application is applied to the back surface of the denier), and then a jute woven fabric as a secondary base fabric is backed by pressure bonding at 135 ° C. A dried carpet was obtained for 25 minutes.

The carpet thus obtained was allowed to stand under the condition of 60 ° C. for a certain period of time (selected as an acceleration condition for evaluating the persistence of insect repellent properties), and then an insect repellent test was conducted. The results are also shown in "Table 2".

[0020]

[Table 2] -5-

[0021]

Table 2 Examples Comparative Examples 1 12 1 2 composition Carboxylated styrene-333 333 333 333 333 (parts by weight) / butadiene latex Calcium carbonate 661 645 665 645 Thickener Appropriate Adequate Adequate Adequate Microradioactive Powder 4 200 0 Diazinon 0 0 20 20 Repellent rate Immediately after production 70 76 0 / (%) 60 ° C After left for 2 months 68 80 0/60 ° C After left for 12 months 73 83 0 / Immediately after production 88 97 0 91 (%) 60 ° C After left for 2 months 88 97 0 18 60 ° C After left for 12 months 92 98 0 0

In Comparative Examples, Comparative Example 1 is a case where no insect repellent effect is applied to the carpet, and Comparative Example 2 is an example in which the conventional residual-effect insecticide diazinon is added to the composition for carpet backing.

The structural formula of diazinon is as follows.

[0024]

[Chemical 1]

The repellent effect and proliferation inhibitory effect determination test were carried out as follows. The mites used in the experiment were mosquitoes. -6-

1. Repellent effect judgment test (insect repellent test) A circular plastic petri dish with a diameter of 35 mm x 10 mm is placed in the center of the adhesive sheet, and 6 petri dishes in a petal shape are placed around the petri dish to make sure to contact the edge of the petri dish in the center. It was set on a pressure-sensitive adhesive sheet for catching, and about 10000 individuals of a mite medium, which was recognized as well propagated, were added to the petri dish in the center as the number of living mites.

Into the 6 petri dishes around the petri dish in the center of the petri dish, a treated sample and a control (untreated) sample, which were hollowed out so as to be in close contact with the inner bottom of the petri dish, were alternately squeezed into the petri dish, and the petri dish was attracted to each center region 50m powdered feed as substance
I put it.

The petri dish thus set together with the adhesive sheet was placed in a plastic food storage container of 27 cm × 13 cm × 19 cm, and saturated saline solution was used to obtain a humidity of 75 ± 5.
%, And stored in an incubator at a temperature of 25 ± 1 ° C. for 24 hours.

The number of living mites was observed by washing the mites on the inner surface of each sample and the petri dish with a washing method, and by measuring the mites in the powder feed used as the inducer by the saturated saline floating method. The judgment of the repellent effect was calculated by the following formula.

[0030]

[Formula 1]

2. Proliferation suppression effect determination test (insecticidal test) A circular plastic petri dish with a diameter of 35 mm x 10 mm was placed on a commercially available adhesive sheet for capturing cockroaches, and a treated sample cut into a diameter of 35 mm was laid so as to adhere to the bottom of the petri dish, 0.2 g of mite medium adjusted to about 200 / 0.2 g was put on the surface, and the same operation was performed on a control (untreated) sample. -7-

The petri dish thus set together with the adhesive sheet was placed in a plastic food storage container of 27 cm × 13 cm × 19 cm, and saturated saline solution was used to obtain a humidity of 75 ± 5.
% And stored in an incubator at a temperature of 25 ± 1 ° C. for 3 weeks.

The number of living mites was observed by washing the mites on the inner surface of each sample and the petri dish with a washing method, and mites in the powder feed used as an attractant by a saturated saline floating method.

[0034]

[Formula 2]

(Example 3) Mixing in a precoat 100 g / m ^{2 of} a precoat having the following composition (treatment agent before applying a backing material) on the back surface of the tufted carpet
And then 1 kg of the backing composition of Comparative Example 1
m ² was applied, and then a jute woven fabric as a secondary base fabric was back-bonded by pressure bonding and then dried at 135 ° C. for 30 minutes to obtain a carpet.

As Comparative Example 3, an untreated precoat,
As Comparative Example 4, diazinon was mixed in the precoat to obtain a carpet in the same manner as in Example 3.

The results of the insect repellent and insecticidal tests conducted by leaving the obtained carpet under a condition of 60 ° C. for a certain period of time are shown in Table 3.

[0038]

[Table 3] -8-

[0039]

[Table 3] Comparative Example 3 3 4 Pre-coated acrylic emulsion 90 100 90 Composition Microradioactive powder 10 0 0 (parts by weight) Diazinon 0 0 10 Repellent rate Immediately after production 82 0 / (%) 60 ° C After left for 2 months 84 0 / After left at 60 ° C for 12 months 84 0 / Growth inhibition rate immediately after manufacturing 98 0 93 (%) After left at 60 ° C for 2 months 99 0 4 After left at 60 ° C for 12 months 990 0

Example 4 A backing composition of Comparative Example 1 using 160 filaments 2600 denier fibers obtained by blending 6% nylon 6% with 2% of a drug, melt spinning at 250 ° C., and then stretching 3 times. Was used to prepare a test carpet. The results of the insect repellent test of this carpet are shown in "Table 4".

On the other hand, 2 diazinon was added to nylon pellets.
%, A carpet was produced in the same manner as in Example 4, except that the spun yarn was blended and spun.

However, the value in parentheses shows the data value after 40 times of two-step cleaning (a carpet cleaning method of shampooing with a detergent and then rinsing with water) after leaving the carpet at 60 ° C. for a certain period of time. -9-

[0043]

[Table 4]

[0044]

Table 4 Example Comparative Example 4 5 Microradioactive powder 2% 0 Diazinon 0 2% Growth inhibition rate Immediately after production 98 (99) 10 (%) 60 ° C 2 months left 99 (98) 0 60 ° C 12 months left After 99 (99) 0

Example 5 Polypropylene pellets were blended with 5% by weight of slightly radioactive powder and kneaded at 200 ° C. with a shaft extruder equipped with a T-die, extruded at 200 ° C., and cooled at 30 ° C. at 50 μm. The film was extruded, slit into a width of 8 mm, stretched 4 times, and plain woven to obtain a primary base cloth (weight 10
0 g / m ² ) was prepared, and a test carpet was prepared using the backing composition of Comparative Example 1 using this primary base fabric. The results of insect repellent and insecticidal tests are shown in "Table 5".

As a comparative example, a carpet was prepared by using a primary base cloth to which diazinon was added instead of the above powder.

[0047]

[Table 5] -10-

[0048]

Table 5 Example Comparative Example 5 6 Microradioactive powder 5% 0 Diazinon 0 5% Growth inhibition rate Immediately after production 92 13 (%) 60 ° C. after 2 months left 93 2 60 ° C. after 12 months 930

Example 6 As shown in "Table 6", 5% by weight of slightly radioactive powder was added to the urethane resin, and a 10 mm-thick foam underlayment was obtained using this urethane resin.

A carpet was applied to this underlayment material, the same test as in the above-mentioned example was conducted, and at the same time, the same amount of diazinon was added instead of the slightly radioactive powder, and this was designated as Comparative Example 7.

[0051]

[Table 6] -11-

[0052]

Table 6 Examples Comparative Examples 6 7 Microradioactive powder 5% 0 Diazinon 0 5% Growth inhibition rate Immediately after production 94 90 (%) 60 ° C for 2 months left 95 20 60 ° C for 12 months left 9 5 5

In Table 2, both Example 1 and Example 2 showed good repelling rate and growth inhibiting rate even when left at 60 ° C. for 12 months.

On the other hand, Comparative Example 1 had no insect repellent property and no insecticidal property, and in Comparative Example 2, the growth inhibition rate decreased sharply in a short period after two months at 60 ° C.

In Table 3 as well, when the slightly radioactive powder was added to the precoat, the repellent rate and the growth inhibitory rate were better than those of Examples 1 and 2 even when left for 12 months at 60 ° C., but Comparative Example. In case of 4, the growth inhibition rate is 4 if left at 60 ° C for 2 months
Fell to%.

From Table 4, in Example 4, even though a smaller amount of powder than that in Example 2 was added to the pile for carpet and after 40 times of shampoo cleaning, Example 2 was used. A higher growth inhibition rate was obtained.

On the other hand, in Comparative Example 5, the growth inhibition rate was lower immediately after the production. This is probably because diazinon was considerably scattered during the melt spinning process, resulting in a decrease in the growth inhibition rate. -12-

In Table 5, in the fifth embodiment, 92-
In contrast to having a growth inhibitory rate of 93%, in Comparative Example 6, it was already 13% immediately after the production, and the effect was completely lost after one year.

In Table 6 as well, in Example 6, the effect of the growth inhibitory rate of 94% or more continued for a long period of time, whereas in Comparative Example 7, the above inhibitory rate decreased rapidly with the passage of time. .

[0060]

EFFECTS OF THE INVENTION By adding the slightly radioactive powder of the present invention to the fibers or mixing them at a close distance, a high insecticidal and insecticidal effect was obtained.

The effect lasted semipermanently.

The safety to the human body was high.

There was no offensive odor or irritating odor.

The cleaning resistance was good.

[Reference number] H4P-006

[Chemical 1]

[Reference number] H4P-006

[Formula 1]

[Formula 2]

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

Claims (3)

[Claims] 1. An insect-repellent material, characterized in that a fine radioactive mineral powder is mixed with or coated on a fibrous material or a synthetic resin and applied integrally. 2. The insect-repellent material according to claim 1, wherein the slightly radioactive mineral powder is kneaded in a synthetic fiber or a synthetic resin. 3. The insect-repellent material according to claim 1, which is coated with a resin prepared by mixing fiber material or synthetic resin with slightly radioactive mineral powder.