JP2024035569A - Insect-repellent filter and method for producing insect-repellent filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem where insects frequently passed through the mesh of traditional insect-repellent nets despite the incorporation of insect repellent.

SOLUTION: An insect-repellent filter 1 comprises nonwoven fabric 5, and an insecticide-containing section 4, which contains an insecticidal component. Both the nonwoven fabric 5 and the insecticide-containing section 4 are integrated.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to an insect repellent filter and a method for manufacturing an insect repellent filter.

Patent Document 1 discloses an insect-proof net into which an insecticide is kneaded. In conventional filters such as insect-proof nets as typified by Patent Document 1, many insects pass through the meshes. The reason for this is that the head width is smaller than the mesh of the net, so insects can pass through the mesh, and even if the head width is larger than the mesh of the net, insects can spread the net and pass through it, or look for the expanded mesh. Because there were insects passing through. Furthermore, these insects often pass through the net in a short period of time, and were able to successfully slip through the mesh of the net without being sufficiently affected by the insecticides incorporated into the insect repellent net. Therefore, it could not be said that simply kneading insecticide into conventional nets was sufficiently effective.

Japanese Patent Application Publication No. 2010-57476

The purpose of the present invention is to provide an insect repellent filter that can sufficiently exert an insecticidal effect and to manufacture an insect repellent filter.

The present invention is characterized in that an insect repellent filter includes a nonwoven fabric and an insecticide-containing part containing an insecticidal component, and the nonwoven fabric and the insecticide-containing part are integrated.

It has become possible to provide and manufacture a ventilation filter that has a higher insect repellent effect than conventional filters made of insect repellent nets.

Problems, configurations, actions, and effects other than those described above will be made clear in the detailed description of the invention described below.

Insect filter of first embodiment A partial cutout of the insect repellent filter in Figure 1 Insect repellent filter of second embodiment

Embodiments for carrying out the present invention will be described below with reference to the drawings. In the following, the scope necessary for the explanation to achieve the purpose of the present invention will be schematically shown, and matters necessary for explaining the characteristic parts of the present invention will be mainly explained, and matters for which publicly known techniques can be adopted. The explanation will be omitted.

(First Embodiment) FIG. 1 shows an insect repellent filter 1 of this embodiment. The insect repellent filter 1 of this embodiment can be used as a filter for air conditioning/ventilation equipment, etc. The insect repellent filter 1 exhibits an insecticidal effect on insects that try to invade while allowing ventilation, and prevents insects from entering. The insect repellent filter 1 is in the form of a thin plate, and one surface of the insect repellent filter 1 is an insect repellent surface 2 having both an insect intrusion preventing function and an insect killing function, and the other surface is a non-insect repellent surface 3. Although FIG. 1 shows a configuration in which the plane is rectangular, other shapes such as a circle can be adopted depending on the shape of the place where it is installed.

FIG. 2 shows a partially cut-out view of the insect repellent filter 1 shown in FIG. The insect repellent filter 1 is composed of an insecticide-containing net 4 and a nonwoven fabric 5, and the insecticide-containing net 4 is integrated with the nonwoven fabric 5 on the insect-proof surface 2 side. As a method for integrating the two, manufacturing can be easily achieved by employing heat fusion between the insecticide-containing net 4 and the insect-proof surface 2 side of the nonwoven fabric 5, but it is also possible to integrate the two using an adhesive. Various methods are adopted in which the insecticide-containing net 4 can perform its function.

Here, integration is intended to be a state in which the insecticide-containing net 4 does not separate from the nonwoven fabric 5 within a range in which it can perform its function, and for example, the insecticide-containing net 4 is It includes a form that can be separated from the nonwoven fabric 5 and replaced with a new insecticide-containing net 4 when the insecticidal function deteriorates.

The insecticide-containing net 4 in the form of FIG. It may be a mesh-like fabric woven by, a mesh-like knitted fabric knitted with the threads 6, or a mesh-like molded product in which the threads 6 are integrally formed in a checkerboard pattern. In the case of a mesh fabric or a mesh knit, the intersections of the threads 6 may be melt-bonded or bonded with an adhesive to maintain the shape.

The mesh 7 of the insecticide-containing net 4 has a size that achieves a well-balanced function of ensuring ventilation and preventing insect intrusion. Moreover, the size of the mesh 7 does not need to be uniform in the insecticide-containing net 4, and can be made different between areas where there is a high probability that insects will invade and areas where there is a low probability that insects will invade. For example, the size of the mesh 7 can be made smaller in locations where the probability of intrusion is high than in other locations. This increases the effect of preventing insects from entering, and also prevents ventilation resistance from increasing compared to when the entire structure is made uniformly small.

When the insecticide-containing net 4 adopts a mesh-like fabric, plain weave, diagonal weave, satin weave, etc. can be adopted as the weaving method. Note that the insecticide-containing net 4 in FIG. 2 is an example in which a plain weave type is adopted.

When the insecticide-containing net 4 adopts a mesh-like knitted fabric, the knitting method may be jersey knitting, milling knitting, smooth knitting, or the like.

The thread 6 may be a monofilament or a multifilament made by twisting a plurality of filaments. The base material of the thread 6 may be any material as long as it has chemical resistance to insecticides. Particularly preferable base materials for the thread 6 include polyolefin plastics such as polypropylene, polyethylene, ethylene-vinyl acetate copolymer, and polymethylpentene. Further, in consideration of durability and the like, it is also possible to construct it from metal.

The insecticide contained in the thread 6 is preferably a pyrethroid insecticide that has high immediate insecticidal effect and low toxicity to humans and livestock. Examples of pyrethroid insecticides include etofenprox and allethrin. The insecticide contained in the thread 6 may be a single insecticide or a plurality of insecticides. Further, additives may be added to the base material of the thread 6 or the insecticide in order to fix the insecticide to the base material of the thread 6 or to retain the insecticide.

The insecticide may be kneaded into the base material of the thread 6 or may be coated on the surface of the base material of the thread 6. Since the thread 6 contains an insecticide in the entire base material of the thread 6 or on its surface, the insecticide-containing net 4 has an insecticidal effect on insects that come into contact with the thread 6 depending on the type of insecticide.

The concentration of the insecticide in the base material does not need to be uniform in the insecticide-containing net 4. In areas where the probability of insect invasion is high, the concentration of the insecticide in the base material can be made higher than in areas where the probability of insect invasion is low. As a result, it is possible to prevent insect invasion by increasing the concentration of insecticide in areas where the probability of insect invasion is high, but the concentration is not increased in areas where the probability of insect invasion is low, so insecticide is wasted. Since it is not used for other purposes, it is economical and has less impact on the human body.

The nonwoven fabric 5 is formed by intertwining a large number of filaments. The material of the filament is not particularly limited, but examples include resin and glass. If a resin is selected, mention may be made of polyolefin plastics such as polypropylene, polyethylene, ethylene vinyl acetate copolymer and polymethylpentene.

The density per unit volume of the filaments forming the nonwoven fabric 5 is such that it achieves a good balance between ensuring ventilation and preventing the intrusion of insects and other foreign substances. For example, the density per unit volume of the filaments of the nonwoven fabric 5 may be uniform throughout the nonwoven fabric 5, or it may be higher in areas where insects and foreign matter are likely to be mixed in more frequently than in other areas. You can also do it.

In the insect repellent filter 1, the insect repellent surface 2 is formed by heat-sealing an insecticide-containing net 4 to the surface of the nonwoven fabric 5 on the insect repellent surface 2 side. After heat fusion, the meshes 7 of the insecticide-containing net 4 serve as ventilation holes.

There are the following three cases when insects attempt to invade from the insect-proof surface 2 of the insect-proof filter 1 of this embodiment.

(First case) When a large insect can be blocked by the insecticide-containing net 4 Due to the relationship between the size of the insect trying to enter the filter 1 and the size of the mesh 7, if the insect is large Intrusion is prevented by the insecticide-containing net 4. Large insects wander around the surface of the insect repellent filter 1 in order to try to invade into the insect repellent filter 1 on the surface of the filter 1. However, if the large insect is larger than the mesh 7, for example, at least the large insect If a part of the insect's body is in contact with the insecticide-containing net 4, a part of the large insect will always be in contact with the insecticide-containing net 4, and will stop its activity or die. In addition, even if a large insect forcibly expands the mesh 7 of the insecticide-containing net 4 and tries to enter the non-woven fabric 5, the insecticide-containing net 4 will not work because the non-woven fabric 5 and the insecticide-containing net 4 are integrated. The nonwoven fabric 5 functions as a reinforcing material for the nonwoven fabric 5 and cannot be easily spread, making it difficult for large insects to enter the nonwoven fabric 5. become inactive or die.

(Second case) When an insect tries to forcefully enter the non-woven fabric 5 Even if an insect tries to enter the insect-proof surface 2 side of the non-woven fabric 5, the non-woven fabric 5 and the insecticide-containing net 4 are integrated, so the mesh 7 acts as a reinforcing material for the non-woven fabric 5, insects cannot easily spread the non-woven fabric 5, and while wandering around the surface of the non-woven fabric 5, insects are able to fully absorb the insecticide in the insecticide-containing net 4. While being exposed to water or struggling on the surface of the non-woven fabric 5, they cease to be active or die. When the nonwoven fabric 5 is given an insecticidal effect, it is possible to make it more difficult for insects to enter the nonwoven fabric 5.

In addition, the effect of the reinforcing material is that even if the mesh 7 is exposed to wind and rain, the mesh 7 and the nonwoven fabric 5 mutually function as reinforcing materials, which prevents the mesh 7 from expanding inadvertently and prevents insects from entering. It is possible to prevent the formation of a mesh 7 that is easy to occur. In addition, even if the nonwoven fabric 5 is exposed to wind and rain through the mesh 7, the mesh 7 functions as a reinforcing material for the nonwoven fabric 5, so it can maintain its shape and maintain the functions required of the nonwoven fabric. can be maintained. The effect of the insecticide-containing net 4 as a reinforcing material can be achieved as long as the insecticide-containing net 4 is integrated with the nonwoven fabric 5, and does not need to contain an insecticide.

(Third case) When small insects cannot be stopped by the insecticide-containing net 4 If the size of the small insects trying to enter the filter 1 is smaller than the mesh 7, the small insects It can pass through mesh 7. However, the small insects that have passed through the mesh 7 are temporarily prevented from entering on the insect-proof surface 2 side surface of the nonwoven fabric 5. Small insects try to invade the nonwoven fabric 5, but as in the second case above, the insecticide-containing net 4 and the nonwoven fabric 5 are integrated, so they cannot easily invade the nonwoven fabric 5. Can not.

In order to further try to penetrate into the insect repellent filter 1, small insects wander around the surface of the non-woven fabric 5 and look for a place where they can invade, but since the non-woven fabric 5 and the insecticide-containing net 4 are integrated, the non-woven fabric 5 and Since there is no gap between the insecticide-containing net 4 and the insecticide-containing net 4, when small insects are wandering around on the surface of the non-woven fabric 5 and reach the position of the insecticide-containing net 4 in plan view, they are sure to be killed. When the insect comes into contact with the insecticide-containing net 4, the insecticide in the insecticide-containing net 4 stops its activity and then dies.

Conventional insect filters in which the non-woven fabric and the insecticide-containing net are not integrated may have a gap between the non-woven fabric and the insecticide-containing net, and if a small insect enters the gap, it may come into contact with the insecticide-containing net. However, in this example, small insects are unable to enter between the insecticide-containing net 4 and the nonwoven fabric 5, and their bodies are entangled with the filaments of the nonwoven fabric 5, causing them to struggle. Insects that try to invade your home will be exposed to enough insecticide from the insecticide-containing net 4 that comes into contact with them, and they will cease to be active or die.

Even if a small insect does not touch the insecticide-containing net 4 and tries to invade the insect-proof surface 2 side of the non-woven fabric 5, it will not be able to touch the non-woven fabric 5 because the non-woven fabric 5 and the insecticide-containing net 4 are integrated. Since the insecticide-containing net 4 functions as a reinforcing material, the nonwoven fabric 5 cannot be easily expanded, and furthermore, it is difficult for the insecticide to penetrate into the nonwoven fabric 5, and the insecticide may stop its activity while struggling within the nonwoven fabric. I'll die.

As described above, the present embodiment makes it possible to provide an insect repellent filter that is more effective in killing insects than conventional insect repellent nets.

A method of manufacturing the insect repellent filter 1 of this embodiment will be described below. Regarding the manufacturing method of the insecticide-containing net 4 and the nonwoven fabric 5, conventional manufacturing methods can be adopted.

Typical methods for integrating the insecticide-containing net 4 and the nonwoven fabric 5 are heat fusion or adhesive. However, since integration using an adhesive requires complicated coating, pasting, and curing operations, takes time, and increases cost, integration using heat fusion is advantageous. It is desirable that the heating temperature during thermal fusion is within a range where the influence of deterioration, volatilization, etc. of the insecticide contained in the net 4 is small.

In the manufacturing method of this embodiment, one side of the insecticide-containing net 4 is heated and melted, and then the molten side is attached to the surface of the nonwoven fabric 5. The molten surface of the insecticide-containing net 4 permeates the filaments of the non-woven fabric 5 and hardens, producing an insect-proof filter 1 in which the insecticide-containing net 4 and the non-woven fabric 5 are integrated.

(Second embodiment)
The filter according to the present embodiment is characterized in that the nonwoven fabric and the insect repellent surface are integrated by forming the insect repellent surface directly on the nonwoven fabric 5, and the filter is composed of a plurality of members including the insecticide-containing net 4 and the nonwoven fabric 5. Unlike the first embodiment, the basic composition of the nonwoven fabric and the selection of insecticides are the same as in the first embodiment. In the following, the characteristic parts of this embodiment will be mainly explained.

FIG. 3 shows the insect repellent filter 1 of this embodiment. In this embodiment, the insect repellent surface 2 does not use the insecticide-containing net 4 of the first embodiment, but employs a structure in which the insecticide is directly contained in the surface of the nonwoven fabric 5 on the insect repellent surface 2 side. The part of the nonwoven fabric 5 that contains the insecticide is shown as a nonwoven fabric 8, and the part that does not contain the insecticide is shown as a nonwoven fabric 9. The portion containing the insecticide may be the entire surface of the nonwoven fabric 5, or may be contained partially. When partially containing an insecticide, it is desirable to contain it in the route through which insects invade.

Since the nonwoven fabric 5 has narrow mesh, insects cannot easily enter it. Insects try to invade or get entangled with the filaments of the nonwoven fabric 5, and while they struggle, they are sufficiently exposed to the insecticide on the insect repellent surface 2, and become inactive or die. Note that the insecticide of this embodiment may be the same as that of the first embodiment.

According to this embodiment, it is possible to provide an insect repellent filter that has a higher insecticidal effect than conventional filters.

(Manufacturing method of second embodiment)
A method of manufacturing the insect repellent filter 1 of this embodiment will be described below. Regarding the manufacturing method of the nonwoven fabric 5, a conventional manufacturing method may be adopted.

The insect repellent filter 1 can be obtained by spraying or applying an insecticide diluted with a solvent to the insect repellent surface 2 side of the nonwoven fabric 5 and volatilizing the solvent. The insect repellent filter 1 can be obtained by imparting an insecticidal effect to the filaments constituting the non-woven fabric in advance.

(Third Embodiment) A filter according to this embodiment differs from the first embodiment in that the insect-proofing surface is configured separately, but the basic configuration and operation are the same as the first embodiment. In the following, the characteristic parts of this embodiment will be mainly explained.

In the first embodiment, only the insecticide-containing net 4 on the insect-proof surface 2 held the insecticide, but in this embodiment, not only the insecticide-containing net 4 but also the insect-proof surface 2 side of the nonwoven fabric 5 holds the insecticide. The surface also retains the insecticide.

The structure of the insecticide-containing net 4 is the same as that of the first embodiment, and the structure of the surface of the nonwoven fabric 5 on the insect-proof surface 2 side is the same as that of the second embodiment. The insecticide-containing net 4 is heat-sealed to the insect-proof surface 2 side surface of the nonwoven fabric 5.

According to this embodiment, since the insecticidal structure has two layers, it is possible to achieve a higher insecticidal effect than the first embodiment and the second embodiment.

(Manufacturing method of third embodiment)
A method for manufacturing the insect repellent filter 1 of this embodiment will be described below. Regarding the manufacturing method of the insecticide-containing net 4 and the nonwoven fabric 5, conventional manufacturing methods may be adopted.

First, the insecticide-containing net 4 is made to contain an insecticide in the same manner as in the first embodiment, and the nonwoven fabric 5 is made to contain the insecticide in the same manner as in the second embodiment.

Next, one side of the insecticide-containing net 4 is heated and melted, and then the molten side is attached to the surface of the nonwoven fabric 5. The molten surface of the insecticide-containing net 4 permeates the filaments of the nonwoven fabric 5 and hardens, thereby completing the insect repellent filter 1 in which the insecticide-containing net 4 and the nonwoven fabric 5 are integrated.

Note that the insecticide is not added before the insecticide-containing net 4 and the nonwoven fabric 5 are integrated, and after the integration, the insecticide diluted with a solvent is sprayed on the surface of the insect-proof surface 2 to which the insecticide-containing net 4 is fused. Alternatively, a method may be adopted in which the insect repellent filter 1 is manufactured by coating the insecticide and volatilizing the solvent as necessary.

The present invention is not limited to the embodiments described above, and can be implemented with various modifications without departing from the gist of the present invention. All of these are included in the technical idea of the present invention.

(Other Embodiment 1) This embodiment is an embodiment in which a coarse dust filter is used as the nonwoven fabric 5 and a manufacturing method thereof in the first embodiment, the second embodiment, the third embodiment, and their manufacturing method. It is. Since coarse dust filters are inexpensive and have good ventilation, in this embodiment, it is possible to provide an insect repellent filter 1 with low manufacturing costs and low pressure loss. Note that "coarse dust filter" is a term that categorizes filters according to the definition of JIS (JIS B 9908), and is an obvious term for those skilled in the art.

(Other Embodiment 2) In this embodiment, the yarn 6 of the insecticide-containing net 4 is used in the manufacturing method of the first embodiment, the manufacturing method of the second embodiment, and the manufacturing method of the third embodiment. This is a manufacturing method that uses recycled plastic as raw material. This embodiment enables effective use of resources.

1... Insect repellent filter, 2... Insect repellent surface, 3... Non-insect repellent surface, 4... Insecticide-containing net, 5... Non-woven fabric 6... Thread, 7... Mesh, 8... Non-woven fabric containing insecticide, 9... Insecticide-containing non-woven fabric

Claims (5)

non-woven fabric and
an insecticide-containing part containing an insecticidal ingredient;
An insect repellent filter, wherein the nonwoven fabric and the insecticide-containing part are integrated. The insect repellent filter according to claim 1, wherein the nonwoven fabric and the insecticide-containing portion are constructed as separate members and are integrated by heat fusion. The insect repellent filter according to claim 1, wherein the nonwoven fabric and the insecticide-containing portion are constructed as separate members and are integrated with an adhesive. The insect repellent filter according to claim 1, wherein the insecticide-containing part is made of a net. A ventilation system comprising the insect repellent filter according to claim 1.

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