JPH0624907A - Insect-proofing covering material, its production and insecticide-sticking liquid - Google Patents

Abstract

PURPOSE:To provide an insect-proofing covering material having high durability and imparted with durable insect-proofing activity, a process for the production of the covering material and an insecticide-sticking liquid to be used in the production of the covering material or to be applied in the field to a covering material having lowered insecticidal effect. CONSTITUTION:This insect-proofing covering material is produced by applying an insecticide-containing polyvinyl alcohol layer to the surface of a nonwoven fabric obtained by laminating and bonding split fiber webs composed of a hydroxyl-containing thermoplastic synthetic resin in a state to cross the webs in warp and weft directions. The insect-proofing covering material can be produced by adding an insecticide to an aqueous solution of a polyvinyl alcohol having an average polymerization degree of >=1,000 and a saponification degree of >=99%, applying the obtained insecticide-sticking liquid to the nonwoven fabric and drying with heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pest control coating material. More specifically, insect repellent coverings, which are installed in livestock shelters to protect various livestock from harmful insects such as mosquitoes, and insecticides or repellent insects that are parasitic on horticultural and agricultural products, and the coverings. Insecticide fixing liquid for fixing insecticide to

[0002]

2. Description of the Related Art In Japan, from April to November, a large number of pests such as mosquitoes infiltrate livestock sheds such as chickens, pigs and cows. When livestock animals are sucked by mosquitoes, they interfere with, for example, spawning and milk production, and hinder weight gain. Therefore, in order to exterminate harmful insects and maintain the health of livestock, the pesticides are conventionally sprayed about once a week in a livestock building. However, in a lot of livestock houses, this labor is enormous and the pesticides are used. There is concern about the impact of the fish on the human body, and also on the livestock itself.
In addition, methods such as mosquito nets and insect nets are used to physically prevent mosquitoes from entering, but considering ventilation and other factors, it is not possible to use mosquito nets or insect nets that have fine eyes. It was not possible to prevent the invasion of mosquitoes with a body length of around 1 mm such as Nukaka. In addition, in vegetable cultivation, a covering material such as a ginseng is used to suppress the occurrence of pests. However, physical repellent alone is not enough.

[0003]

DISCLOSURE OF THE INVENTION The present invention is to install various livestock in a barn to protect them from harmful insects such as mosquitoes,
It is an object of the present invention to provide a coating material that solves the above-mentioned various problems with respect to the coating material used to suppress pests and diseases of horticultural and agricultural products. That is, the insect repellent coating material with excellent durability and a method for producing the same, further used for the production of the insect repellent coating material, or when the insect repellent effect of the coating material during use is reduced It is an object to provide an insecticide fixing liquid used for imparting an effect.

[0004]

That is, the present invention relates to a non-woven fabric containing a pesticide-containing polyvinyl alcohol on the surface of a non-woven fabric obtained by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group so as to cross each other. And a nonwoven fabric obtained by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group in a crosswise and crosswise manner. In a method for producing a coating material for insect repellent, which comprises depositing an aqueous solution containing an insecticide in an aqueous polyvinyl alcohol solution having a degree of polymerization of 1000 or more and a saponification degree of 99% or more, and then heating and drying (claim 2). And an insecticide fixing solution (claim 3) obtained by adding an insecticide to an aqueous polyvinyl alcohol solution having an average degree of polymerization of 1700 or more and a saponification degree of 99% or more, Hitoshi polymerization degree of 1700 or more and a saponification degree 99
% Of a polyvinyl alcohol aqueous solution and an insecticide are mixed, which is a method for producing an insecticide-fixing solution (claim 4).

The present invention will be described in detail. The nonwoven fabric which is the base material of the insect-repellent coating material of the present invention is obtained by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group so as to cross each other.
A method for manufacturing this nonwoven fabric will be described. First, a thermoplastic synthetic resin having a hydroxy group, for example, a polyvinyl alcohol having an average degree of polymerization of 1400 or more and a saponification degree of 99% or more is formed into a film, and the film is uniaxially oriented, for example, in the longitudinal direction at about 5.5 to 6. After hot drawing to about 5 times, split processing is performed. By this split treatment, numerous crack lines are generated in the film in the stretching direction, and the film is finely divided into a flat fibrous web.

The flat split fiber web thus obtained is widened, and a plurality of the widened split fiber webs are laminated so that the fiber directions cross each other, that is, the weft and cross, and bonded to form a nonwoven fabric. to make.
The degree of widening at this time can adjust the porosity (size of the mesh) and the air permeability of the non-woven fabric and thus the covering material as a product.
For the adhesion, for example, an adhesive such as polyvinyl alcohol is applied and adhered. This non-woven fabric has high strength and excellent weather resistance, so that the covering material made from this non-woven fabric can be used for many years. This non-woven fabric is
It is commercially available from Kanebo Co., Ltd. under the name Toughbell (registered trademark).

The insect repellent coating material of the present invention is obtained by fixing an insecticide fixing solution prepared by blending an insecticide in an aqueous polyvinyl alcohol solution having an average polymerization degree of 1000 or more and a saponification degree of 99% or more, to the above-mentioned nonwoven fabric. It has insect repellent properties. Nonwoven fabric, which is a base material composed of a thermoplastic synthetic resin having a hydroxy group, is excellent in hygroscopicity and moisture permeability, and therefore is well compatible with the above-mentioned aqueous insecticide fixing solution using polyvinyl alcohol as a fixing agent, and insecticide. The agent can be firmly fixed on the substrate.

The insecticide-fixing solution used in the present invention is prepared as follows. That is, a polyvinyl alcohol having a degree of polymerization of 1000 or more, preferably 1700 or more and a saponification degree of 99% or more is used to prepare an aqueous solution having a desired concentration, and an insecticide is added thereto while stirring. The concentration of polyvinyl alcohol is preferably about 4 to 10% by weight. The insecticide should have an appropriate concentration depending on the type of target pest.

The insecticide used in the present invention may be water-soluble or water-emulsifiable. The preferable insecticides used in the present invention are exemplified. Organophosphorus insecticide 0.0-Dimethyl-0- (3-methyl-4-nitrophenyl) phosphorothioate: fenitrothion (2-isopropyl-4-methylpyrimidyl-6) diethylthiophosphate: diazinone 0.0 -Dimethyl-0- [3-methyl-4- (methylthio) phenyl] thiophosphate: phenthion

Pyrethroid insecticide N- (3,4,5,6-tetrahydrophthalimide) methyl (±) -cis, trans-chrysansemate: tetramethrin 5-benzyl-3-furylmethyl-d, l-cis , Trans-chrysanthemate: resmethrin 3-phenoxybenzyl-d, l-cis, trans-chrysanthemate: phenothrin 3-phenoxybenzyl-d, l-cis, trans-
3 '-(2,2-dichlorovinyl) -2', 2'-dimethylcyclopropanecarboxylate: permethrin 2-cyano-3-phenoxybenzyl-2-isopropyl-4'-chlorophenylacetate: fenvalerate
To

Carbate insecticide 1-naphthyl-N-methyl carbamate

A method for fixing the above insecticide fixing liquid to the above nonwoven fabric will be described. The nonwoven fabric produced as described above is immersed in the above insecticide fixing solution at room temperature, pulled up, squeezed, and then air-dried in a spread state. Moreover, you may heat-dry at 20-60 degreeC. Further, as it is spread, dipping, squeezing and heat drying may be continuously performed. By this drying, the insecticide-fixing liquid firmly adheres to the surface of the non-woven fabric, and imparts excellent insect repellent property with long-lasting property. The steps of dipping and drying may be repeated several times as needed. The fixing liquid may be applied to the nonwoven fabric by spraying instead of dipping.

The fixing treatment with the insecticide fixing liquid can be performed on the insect-proof coating material having a reduced insect-proof effect at the site where the coating material is used to enhance the insect-proof effect again. Therefore,
The insect-repellent coating material of the present invention has an advantage that it can be used for many years by repeatedly performing the fixing treatment with the insecticide fixing liquid because the nonwoven fabric as the base material has excellent durability. is there. The insecticide-fixing liquid of the present invention is an aqueous liquid and is easy to handle because it does not use an organic solvent. Using this, the insect repellent coating material can be manufactured very easily or the insect repellent effect can be re-applied. be able to.

The insect-repellent coating material of the present invention has an insecticide-containing layer on its surface. Even if the size of the eyes of this dressing is larger than, for example, a size that allows mosquitoes to pass through, the mosquitoes once stop in the dressing and then penetrate into the dressing through the eyes of the dressing. , The blood-sucking ability disappears under the influence of the insecticide which is in contact with or sublimates the insecticide while stopped in this coating material.

Further, since the insect-repellent coating material of the present invention has an insecticide-containing layer on its surface, when it is used as a coating material for horticultural and agricultural products, even if the insect pests hatch within the coating material. Even if it occurs due to the above, or occurs due to infiltration, or occurs from the soil, it may be killed or its reproduction may be reduced by contact with the covering material or by the effect of the sublimed insecticide.
In addition, even small pests that can pass through the gaps of the covering material,
Since it once stops at the covering material and then penetrates into the inside of the covering material through the eyes of the covering material, it is affected by the insecticide. Therefore, when this insect-proof coating material is used, it is possible to obtain almost the same insect-proof effect as the above-mentioned insect-repellent coating, without the need for labor and spraying of the dangerous insecticide. Next, examples of the present invention will be described.

[0016]

【Example】

Production Example 1 A film having a thickness of 60 μm was molded from polyvinyl alcohol having a polymerization degree of 1700 and a saponification degree of 99.5%, and this film was heat-stretched 6 times in the machine direction. This stretched film was rubbed on a rotating roll whose surface was composed of a file to split it in the longitudinal direction to obtain a split fiber web.
This split fiber web is expanded three times in the lateral direction, and the split fiber web, which is also expanded three times in the horizontal direction, is laid on top of it so that it is orthogonal, and it is immersed in an aqueous polyvinyl alcohol solution and heat dried to bond the vertical and horizontal webs together. A mesh-like non-woven fabric (Toughbell brand name) was prepared.

An insecticide fixing solution was prepared by mixing 1 part by weight of a 6% aqueous solution of polyvinyl alcohol having a polymerization degree of 1700 and a saponification degree of 99.5% with 1 part by weight of a permethrin emulsion having a concentration of 4% by weight. . The reticulated non-woven fabric prepared above was dipped in the insecticide fixing solution, squeezed, and then thoroughly dried. This immersion and drying may be repeated. Thus, the insect repellent coating material of the present invention was obtained.

Production Example 2 The same operation as in Production Example 1 was carried out except that 1 part by weight of a diazinon emulsion having a concentration of 5% by weight was used in place of the permethrin emulsion of Production Example 1 to obtain an insect repellent coating material of the present invention. . Production Example 3 Production Example 1 except that 1 part by weight of fenvalerate emulsion having a concentration of 5% by weight was used in place of the permethrin emulsion of Production Example 1.
The same operation as described above was performed to obtain the insect-repellent coating material of the present invention.

Experimental Example 1 The insect-repellent coating material obtained in Production Example 1 was spread vertically over the entire circumference of the cow house into a belt-shaped carten with a height of 2.5 m. Every day, hang it from the evening to the morning to prevent invasion of mosquitoes and deer, and from the morning to the evening, slide it sideways to fix it to each strut for better ventilation. In April, young chickens were placed in this pens and started to be raised. As a control, a quill without a cover material for insect repellent was used, and young chickens were put in April to start breeding.

[0020] The total number of female mosquitoes in the shack and the blood-absorption rate of chickens (with a blood test of chickens and blood-absorption of mosquitoes) in the case of using the insect-proof coating material and in the control group in which the insect-proof coating material is not used It was investigated whether or not they are being bred, and the blood-bearing rate = (chicken sucked by mosquitoes / total number of chickens) x 100] and the egg-laying rate of chickens [laying rate = (number of eggs laid per day / chicken) Of the total number) × 100]. The results are shown in Table 1, Table 2 and Table 3.
As shown in Table 1, the total number of female mosquitoes in the duck was compared with the control area without the insect repellent when the insect repellent was used in May, June, and July. The total number of female mosquitoes in the house was extremely low, but there was not much difference between August and September. However, the blood-sucking rate, as shown in Table 2,
When the insect repellent coating material was used, it was consistently markedly lower from May to September than in the control group. In addition, as shown in Table 3, the egg laying rate was also consistently improved from May to September when the insect repellent coating material was used, compared to the control group. In August and September, although the total number of female mosquitoes in the stall was almost the same between the case where the insect repellent coating material was used and the control area where it was not used, the blood absorption rate decreased. Also, the reason why the egg-laying rate was improved is considered to be that the blood-feeding ability of female mosquitoes was lost due to the effect of the insecticide fixed to the covering material, and the number of female mosquitoes having no blood-feeding ability increased.

[0021]

[Table 1]

[0022]

[Table 2]

[0023]

[Table 3]

Experimental Example 2 From the end of January to the beginning of March, the following test was carried out in the cultivation of Shandong vegetables in Okinawa Prefecture. We sown 3 ridges of Shandong vegetables in the field, leaving 1 ridge as it is (hereinafter referred to as open field), 1 ridge covered with a insect repellent in a tunnel shape (hereinafter referred to as conventional coating),
The remaining one ridge was covered in a tunnel shape with the insecticide-fixed insecticidal coating material obtained by fixing the insecticide to the insecticidal coating material according to Production Example 1 (hereinafter referred to as the coating of the present invention). Tunnels with each dressing were made at the same time as seeding for rigorous comparison. 1
Observed every week. After 4 weeks, it was confirmed that the insect pest, Plutella xylostella, invaded through the voids of each coating material. After 5 weeks, the conventional coating showed food damage, which was not so different from the open field, but the present coating did not show food damage. At 6 weeks after harvesting, the coating of the present invention also showed some feeding damage, but it was much less than the open coating and the conventional coating.
From this, it was confirmed that the covering material to which the insecticide was fixed had an excellent insect-proof effect.

[0025]

INDUSTRIAL APPLICABILITY In the insect proof coating material of the present invention, a pesticide-containing polyvinyl alcohol is provided on the surface of a nonwoven fabric obtained by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group so as to cross each other. However, the nonwoven fabric is excellent in durability and is inexpensive because it can be obtained by a simple method of laminating and adhering split fiber webs in a crosswise and crosswise manner. Further, since the pesticide-containing polyvinyl alcohol layer is provided on the surface thereof, this has a long-lasting insect repellent effect in combination with the characteristics of the nonwoven fabric.
Further, the insecticide-fixing solution of the present invention is prepared by blending an insecticide in an aqueous polyvinyl alcohol solution having an average degree of polymerization of 1700 or more and a saponification degree of 99% or more, and thus can be easily prepared, and an organic solvent. It is easy to use because it is not used. Then, when the insect repellent coating material has a poor insect repellent effect, the insecticide fixing liquid can be attached to easily reinforce the repellent effect.

Therefore, according to the present invention, various livestock are installed in livestock shelters in order to protect them from harmful insects such as mosquitoes, gardening, etc.
It is extremely useful as an insect repellent coating material installed in fields to kill or repel harmful insects that parasitize agricultural crops. By using the insecticidal coating material of the present invention, the labor of spraying the insecticide can be omitted or reduced, and the amount of the insecticide applied to livestock and agricultural products can be reduced, so that the safety can be improved.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Kobayashi 5-6-17 Koganehara, Matsudo City, Chiba Prefecture (72) Inventor Toru Sasaki 451-1 Vigreyashima 451-1 Oto, Shimodate City, Ibaraki Prefecture

Claims (4)

[Claims] 1. A pesticidal coating comprising a polyvinyl alcohol layer containing an insecticide on the surface of a non-woven fabric obtained by laminating and adhering a split fiber web made of a thermoplastic synthetic resin having a hydroxy group so as to cross the weft and cross directions. Material. 2. A polyvinyl alcohol having an average degree of polymerization of 1000 or more and a degree of saponification of 99% or more is applied to a nonwoven fabric obtained by laminating and adhering split fiber webs made of a thermoplastic synthetic resin having a hydroxy group so as to cross each other in a weft and weft direction. A method for producing a coating material for insect repellent, which comprises depositing an aqueous solution containing an insecticide in an aqueous solution and then heating and drying. 3. An average degree of polymerization of 1700 or more and a degree of saponification of 99%.
An insecticide-fixing liquid obtained by blending the above polyvinyl alcohol aqueous solution with an insecticide. 4. An average degree of polymerization of 1700 or more and a degree of saponification of 99%.
A method for producing an insecticide-fixing solution, which comprises mixing the above polyvinyl alcohol aqueous solution and an insecticide.