JP3196082U - Insect net - Google Patents

Abstract

An insect repellent net capable of sustaining a repellent effect against insects for a longer period of time is provided. An insect repellent net, which is a mesh structure composed of at least a portion of an insect repellent that is a monofilament capable of releasing an insect repellent, the insect repellent being in liquid form with a first thermoplastic resin. The first polymer block exhibiting a higher compatibility with the first thermoplastic resin than with some insect repellent and more with respect to the insect repellent that is liquid than with the first thermoplastic resin An insect repellent comprising a plurality of insect repellent-holding copolymers 4 comprising a second polymer block exhibiting high compatibility, phase-separating from the first thermoplastic resin and retaining the insect repellent therein The holding part 2 and the second thermoplastic resin are included, and the insect repellent that moves from the insect repellent holding part is arranged on the outer surface of the insect repellent holding part. Released into And a control unit 3. [Selection] Figure 2

Description

  The present invention relates to an insect net having a repellent effect against pests and the like.

  Conventionally, in a house, a screen door that allows natural winds to enter and exit while preventing insects from entering is often used. Here, a window or the like on which a screen door is installed generally tends to be an entry path for insects and the like into the house.

  Therefore, an insect net having repellent properties against pests and the like is desired.

  In order to solve these problems, an insect repellent having a core-sheath structure and an insect repellent active compound incorporated in the sheath (Patent Document 1), or a multifilament yarn race impregnated with an insect repellent and an adhesive. A network (Patent Document 2) has been proposed.

JP 2010-13390 A JP 2001-220970 A

  However, the insect repellent effect for insects does not last for a long time in the case of a yarn in which an insect repellent is kneaded in the sheath portion of the core-sheath structure or an insect repellent net impregnated with a multifilament yarn race.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an insect repellent net that can maintain a repellent effect against insects for a longer period of time.

The inventor has conceived that the filament constituting the insect net has a multilayer structure such as a core-sheath structure, and the insect repellent is held in an inner layer such as a core part. However, when a thermoplastic resin is used as a filament material, there is a problem that when the filament is melt-spun, the insect repellent does not remain in the inner layer due to heating. As a result of diligent research, the inventor has carried out phase separation of the insect repellent with respect to the thermoplastic resin constituting the filament, and retained the liquid insect repellent inside the copolymer that can be slowly released, thereby maintaining the inner layer. As a result, it was found that the composition could be spun while retaining the insect repellent, and the present invention was completed.
The gist of the present invention is as follows.
[1] An insect net that is a mesh structure composed of at least a part of an insect repellent that is a monofilament capable of releasing an insect repellent,
The insect repellent thread is
The first thermoplastic resin and the first polymer block and the first thermoplastic resin exhibiting higher compatibility with the first thermoplastic resin than with the liquid insect repellent. In contrast, the second polymer block having higher compatibility with the insect repellent that is liquid than the first polymer block is phase-separated with respect to the first thermoplastic resin and liquid is contained therein. An insect repellent holding part comprising a plurality of insect repellent holding copolymers holding the insect repellent,
The second thermoplastic resin is included and is disposed outside the insect repellent holder and in contact with the outside, and the insect repellent moving from the insect repellent holder is released to the outside on the surface. An insect repellent net.
[2] The monofilament has a core-sheath structure including a core part and a sheath part laminated on the core part and in contact with the outside.
The insect repellent net according to [1], wherein the core part is the insect repellent holding part, and the sheath part is the release control part.
[3] In the monofilament according to [2], a cross-sectional area ratio between the core portion and the sheath portion in a plane perpendicular to a length direction of the yarn is 2: 8 to 8: 2. Insect net as described.
[4] The first thermoplastic resin and the second thermoplastic resin are polypropylene, the first polymer block is made of polypropylene, and the second polymer block is made of polystyrene. The insect net according to any one of [1] to [3].

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the insect net which can maintain the repelling effect with respect to an insect for a long period of time.

It is the figure which represented a part of insect repellent net of this embodiment typically. It is the figure which represented typically the insect repellent which concerns on the insect repellent net of this embodiment.

  Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram schematically showing a part of the insect net of this embodiment.
The present embodiment relates to an insect net that is a mesh structure formed by using an insect repellent thread 1 that is a monofilament capable of releasing an insect repellent, and the insect repellent thread 1 includes a thermoplastic resin (first thermoplastic resin) and An insect repellent holding part including a plurality of insect repellent holding copolymers, and a thermoplastic resin (second thermoplastic resin), disposed outside the insect repellent holding part and in contact with the outside, from the insect repellent holding part The moving insect repellent has a release control part that is released to the outside on its surface. The first thermoplastic resin and the second thermoplastic resin may be the same or different. Also, the insect repellent retaining copolymer is more soluble with respect to the first polymer block and the first thermoplastic resin that are more compatible with the first thermoplastic resin than with the liquid insect repellent. A second polymer block having higher compatibility with the liquid insect repellent, phase-separating with respect to the first thermoplastic resin, and retaining the insect repellent inside the copolymer .
As an example of the insect-repellent net of this embodiment, a case where the insect-repellent yarn has a core-sheath structure as shown in FIG. 2 configured by a core part and a sheath part laminated on the core part and in contact with the outside will be described. To do. FIG. 2 is a diagram schematically showing a cross section of the insect-repellent yarn 1. In this case, the core part 2 is an insect repellent holding part, and the sheath part 3 is a release control part.
The insect repellent net of this embodiment is manufactured using, for example, the insect repellent yarn 1 which is a monofilament containing an insect repellent, and is, for example, a woven body manufactured by combining wefts and warps.

  The material constituting the core part 2 and the sheath part 3 in the insect repellent thread 1 of this embodiment has fiber forming ability, and the insect repellent is released so that the insect repellent released from the insect repellent holding part can move to the outside of the insect repellent thread. As long as it is a thermoplastic resin that can constitute the yarn 1, it is not particularly limited and can be appropriately selected. Moreover, the material which comprises the core part 2 and the sheath part 3 may be the same, or may differ.

The insect repellent retained in the core 2 is retained in a liquid state in the insect repellent retaining copolymer 4. Further, the insect repellent retained in the insect repellent retaining copolymer 4 is released out of the insect repellent retaining copolymer 4 by bleeding. Therefore, the release of the insect repellent to the outside of the insect repellent yarn can be controlled as compared with the case where the insect repellent is contained in the core as it is.
The copolymer according to the insect repellent retaining copolymer 4 includes a first polymer block having higher compatibility with the thermoplastic resin constituting the insect repellent retaining portion than the liquid insect repellent, and the insect repellent retaining It comprises a second polymer block that is more compatible with the insect repellent that is liquid than with the thermoplastic resin that constitutes the part. The copolymer is phase-separated with respect to the thermoplastic resin constituting the insect repellent holder. The liquid insect repellent is incorporated and held in the copolymer.
The 1st polymer block and 2nd polymer block which comprise a copolymer can be suitably set according to the kind etc. of the thermoplastic resin which comprises the core part 2 (insecticide holding | maintenance part). Furthermore, the thermoplastic resin constituting the sheath 3 (release control unit) is not particularly limited.
For example, the thermoplastic resin constituting the core portion 2 (insect repellent holding portion) of the insect repellent yarn 1 and the thermoplastic resin constituting the sheath portion 3 (release control portion) are made of polypropylene, and the first polymer block is made of polypropylene. The second polymer block can be made of polystyrene.
In addition, the insect repellent-containing copolymer may be, for example, a known one or a commercially available product, and is not particularly limited, and can be appropriately selected by those skilled in the art. For example, what hold | maintained arbitrary insect repellents to the copolymer disclosed by international publication 2007/010787 can be used. Master batch pellets containing the copolymer in resin are sold as SROPE (registered trademark) by Kuraray Living Co., Ltd.

  That is, in this embodiment, the insect repellent remains in the yarn after melt spinning, and the insect repellent is released to the outside through the core 2 and the sheath 3 so that the release of the insect repellent can be controlled. It is provided with the composition which is. Thereby, since the spreading | diffusion of an insect repellent can be suppressed compared with the past, it becomes possible to maintain the repellent effect with respect to an insect for a long period of time.

  In this embodiment, the form of the insect repellent thread 1 is not particularly limited as long as it is a monofilament, and can be appropriately selected by those skilled in the art. Further, the cross-sectional shape of the vertical surface with respect to the length direction of the insect-proof yarn 1 having the core-sheath structure is not particularly limited, but a circular shape is preferable, and the core-sheath shape is also preferably concentric. The cross-sectional area ratio between the core part 2 and the sheath part 3 is preferably 2: 8 to 8: 2. When the ratio of the core part 2 is smaller than the ratio of the cross-sectional area of 2: 8, the thickness of the sheath part 3 becomes too large, and the effect of the insect repellent disposed on the core part 2 is reduced as compared with the case of being within the range. . On the other hand, when the ratio of the core portion 2 is larger than the cross-sectional area ratio of 8: 2, the thickness of the sheath portion 3 becomes too small, and the effect of the insect repellent is not maintained as compared with the case where it is within the range.

The insect repellent which is a substance having repellent property against insects in the present embodiment is not particularly limited as long as it can be retained in the copolymer according to the insect repellent retaining copolymer 4 in a liquid form at room temperature, and can be appropriately selected by those skilled in the art. is there. Specifically, among the compounds exhibiting repellent properties against insects, insecticides are maintained by retaining a compound that is liquid at room temperature (liquid compound), an insecticide dissolved in a solvent such as an organic solvent, and the like inside the copolymer. An agent-holding copolymer 4 can be obtained.
Examples of insect repellents include pyrethroids such as pyrethrin, cineline, jasmolin, allethrin, resmethrin, fenvalerate, permethrin, pyrethroid insecticides such as toxaphene and benzoepin, organophosphorus insecticides such as malathion and fenitrothion, Examples thereof include carbamate insect repellents such as carbaryl, mesomil, and promecarb. These insect repellents can be used alone or in combination of two or more. Among these, a pyrethroid insect repellent that has excellent repellency, is fast-acting, and has low acute toxicity can be suitably used.

  A method for manufacturing the insect-repellent yarn 1 according to this embodiment can be appropriately selected by those skilled in the art, and is not particularly limited. For example, as a rational and inexpensive manufacturing method of the insect repellent thread 1, an insect repellent is filled in the material constituting the core part 2 of the insect repellent thread 1 to form the core part 2, and only the material constituting the thread is used as the sheath part 3. There is a method of melt spinning. Specifically, a master batch pellet is manufactured in advance from pellets of thermoplastic resin containing the insect repellent retaining copolymer 4 and having fiber forming ability, and the master batch pellet is used as the core 2. Next, a core-sheath-structured yarn having an insect repellent is produced using a known core-sheath spinning apparatus using a thermoplastic resin pellet having the same fiber-forming ability as that of the master batch pellet as the sheath part 3.

  In the case of the method of forming the core 2 by filling a resin or the like with an insect repellent, a yarn in which the insect repellent retaining copolymer 4 is dispersed in the core 2 without variation is obtained. The insect repellent holding copolymer 4 may be unevenly distributed inside. For example, it is in the form of a thread in which only one half of the core 2 of the insect repellent thread 1 is filled with an insect repellent-holding copolymer. For example, the insect repellent is unevenly distributed outside the building. Although it spreads to the inside, it becomes difficult to spread inside the building.

  In addition, the insect screen of the present embodiment may include other components as a functional material in order to impart an arbitrary function. The functional materials include titanium dioxide as a matting agent, calcium stearate as a lubricant, fine particles such as silica and alumina, hindered phenol derivatives as antioxidants, and colorants such as pigments, stabilizers, dispersants, etc. In addition to these additive materials, functional materials such as ultraviolet shielding agents, near infrared shielding agents, antibacterial agents, antifungal agents, antistatic agents, flame retardants, weathering agents, and various catalysts may be added. In addition, this functional material should just be disperse | distributed in the core part 2 with the insect repellent holding | maintenance copolymer 4, or should just adhere to the surface of a thread | yarn.

  In the present embodiment, the insect repellent thread 1 may have a cross-sectional shape having a circular cross-section, a flat cross-section, a triangle, a hollow, a star-shaped cross section, or a hollow portion, or a core-sheath composite or sea-island composite monofilament. . Among these cross-sectional shapes, a round cross-section is preferable from the viewpoint of wear resistance, posture stability, and smoothness.

  The insect net of the present embodiment is configured using, for example, the above-mentioned insect-repellent yarn 1 for warp (warp) and / or weft (weft), and has a substantially rectangular opening by weaving them using a known method. Can be obtained as

  The insect net according to this embodiment obtained as described above can maintain the repellent property against insects for a longer period of time. The insect screen of this embodiment can be used for a home screen door or the like.

  Next, an example is given and the present invention is explained more concretely. However, the present invention is not limited to these examples.

(Manufacture of master batch pellets)
Polypropylene master batch pellet (SROPE Kuraray Living Co., Ltd.) and polypropylene resin containing polypropylene block and polystyrene block and containing a repellent retaining copolymer containing pyrethroid permethrin as a liquid compound Using a kneader, a master batch pellet for producing insect repellent yarn in which permethrin was dispersed to 3% by mass of the whole was prepared.

Example 1
(Spinning and weaving)
The yarn for insect repellent net used in this example has a master batch pellet for manufacturing the insect repellent yarn as a core portion, a polypropylene resin as a sheath portion, and a core portion on a surface perpendicular to the length direction of the yarn, An insecticidal yarn having a core-sheath structure was prepared using a melt spinning apparatus equipped with a spinneret for a core-sheath composite fiber so that the cross-sectional area ratio with the sheath was 6: 4. Using this insect repellent yarn, a normal sulzer loom (manufactured by Sulzer) was woven into a plain weave fabric having a density of 20 / 2.54 cm in both the warp and weft directions to obtain an insect repellent net.

(Comparative Example 1)
In place of the insect repellent retaining copolymer in the above examples, the permethrin emulsion and the polypropylene resin were kneaded using a biaxial kneader so that the permethrin was 3% by mass with respect to the master batch pellet for producing the insect repellent yarn, Masterbatch pellets for the production of insect repellents containing permethrin were prepared. Thereafter, a core-sheath yarn (monofilament) was prepared by melt spinning.

(Evaluation of repellency against Aedes albopictus)
In order to evaluate the repellent performance of the insect repellent nets of the examples, the repellent property against Aedes albopictus was evaluated.
In the acrylic box (30 cm × 30 cm × 30 cm), 20 non-blood-sucking adult Aedes albopictus were released, and a mouse covered with an insect net was placed in the acrylic box as a specimen. In 5 minutes after the sample was introduced, the number of human striped mosquitoes landed on the sample was measured every 30 seconds. The insect repellent rate was calculated by the following formula using a 20 mesh insect repellent screen made of polypropylene (PP20) that does not contain an insect repellent, the insect repellent screen of Example 1, and the repellent screen of Comparative Example 1.

  A repellent rate of 60% or more was judged as A, 30-60% was judged as B, and 30% or less was judged as C. When A was judged, it was judged that a good repellent rate was shown. As a result of evaluating the repellency of each insect repellent net, it was A in the insect repellent net of Example 1. On the other hand, in the insect net of Comparative Example 1, it was B determination. In the comparative example in which the insect repellent retaining copolymer was not used, it was confirmed that there were few insect repellent components remaining in the yarn during melt spinning and the repellent effect was low.

1: Insect repellent thread 2: Core part 3: Sheath part

Claims (4)

An insect net that is a mesh structure composed of at least a part of an insect repellent thread that is a monofilament capable of releasing an insect repellent,
The insect repellent thread is
The first thermoplastic resin and the first polymer block and the first thermoplastic resin exhibiting higher compatibility with the first thermoplastic resin than with the liquid insect repellent. In contrast, the second polymer block having higher compatibility with the insect repellent that is liquid than the first polymer block is phase-separated from the first thermoplastic resin, and the insect repellent is contained therein. An insect repellent holding part comprising a plurality of insect repellent holding copolymers for holding the agent;
The second thermoplastic resin is included and is disposed outside the insect repellent holder and in contact with the outside, and the insect repellent moving from the insect repellent holder is released to the outside on the surface. An insect repellent net. The monofilament has a core-sheath structure composed of a core and a sheath stacked on the core and in contact with the outside.
The insect repellent net according to claim 1, wherein the core part is the insect repellent holding part, and the sheath part is the release control part.   The insect repellent according to claim 2, wherein in the monofilament, a cross-sectional area ratio between the core portion and the sheath portion in a plane perpendicular to the length direction of the yarn is 2: 8 to 8: 2. network.   The first thermoplastic resin and the second thermoplastic resin are polypropylene, the first polymer block is made of polypropylene, and the second polymer block is made of polystyrene. Item 4. The insect net according to any one of items 1 to 3.