WO2021070642A1

WO2021070642A1 - Insect-repelling cover

Info

Publication number: WO2021070642A1
Application number: PCT/JP2020/036422
Authority: WO
Inventors: 秋庭　英治
Original assignee: クラレトレーディング株式会社
Priority date: 2019-10-07
Filing date: 2020-09-25
Publication date: 2021-04-15
Also published as: JPWO2021070642A1; CN114513953A

Abstract

This insect-repelling cover is made of a fabric that comprises insect repellent-containing fibers in at least a portion thereof, and the opening area ratio of the fabric is at least 40%.

Description

Insect repellent cover

The present invention relates to an insect repellent cover for preventing blood sucking by blood-sucking insects such as mosquitoes, for example.

In recent years, infectious diseases such as malaria, dengue fever, and Zika fever that have occurred in the tropics and subtropics have spread to relatively high latitude areas along with global warming, and the danger has been pointed out in Japan as well. It's coming.

These infectious diseases are mosquito-borne diseases, and in order to prevent them, insect repellents, insect repellent clothing, insect screen doors, insect repellent mosquito nets, etc. are used. In particular, insect repellent clothing directly protects human skin. Therefore, various fabrics having an insect repellent function have been proposed.

For example, Patent Document 1 proposes a fabric treated with a blood-sucking pest repellent using DEET (N, N-diethyl-3-methylbenzamide). Further, Patent Document 2 proposes a heat-sealing fiber structure having excellent washing durability that holds a mosquito repellent on one side. Further, Patent Document 3 proposes a net-like insect repellent sheet obtained by post-processing an insect repellent.

In December 2018, JIS L 1950-1 (a mosquito repellent test method by the attracted blood sucking device method) was issued to quantitatively evaluate the ability to prevent mosquito blood sucking when worn by the human body. Standardization of the evaluation method of the mosquito-proof performance of the fabric is also in progress.

Japanese Unexamined Patent Publication No. 8-188966 Japanese Unexamined Patent Publication No. 2016-183110 Utility Model Registration No. 3098289

The fabrics for insect repellent clothing so far have basic performance as clothing, for example, air permeability above a certain level, shielding property such as outside air and light, and see-through prevention property. However, no fabric has been proposed that specializes only in mosquito repellent and wearing comfort and covers areas where there is a risk of mosquito bites, such as the arms and legs of humans and animals.

Therefore, the present invention has been made in view of the above-mentioned problems, and is made of a fabric that covers a portion that may be bitten by a blood-sucking insect, effectively prevents blood-sucking by the insect, and is lightweight and expensive. It is an object of the present invention to provide an insect-proof cover which is breathable and has excellent wearing comfort.

The present inventors have completed the present invention as a result of diligent studies to solve the above problems. That is, the present invention provides the following preferred embodiments.

[1] An insect repellent cover made of a fabric containing at least a part of fibers containing an insect repellent and having an opening ratio of the fabric of 40% or more.

[2] The insect repellent cover according to the above [1], wherein the basis weight of the fabric is 20 g / m ^{2 or less.}

[3] The insect repellent cover according to the above [1] or the above [2], wherein the content of the insect repellent in the dough is 0.1 to 4.0 g / m ^2.

[4] The insect repellent cover according to any one of [1] to [3] above, wherein the insect repellent is kneaded into the resin constituting the fiber.

[5] The insect repellent cover according to any one of [1] to [4] above, wherein the insect repellent is icaridin.

[6] The insect repellent cover according to any one of [1] to [5] above, wherein the fiber is a monofilament.

[7] The insect repellent cover according to any one of [1] to [5] above, wherein the fiber is a multifilament.

[8] The insect repellent cover according to any one of [1] to [7] above, wherein the fabric corresponds to the classification symbol E95 + having a mosquito blood-sucking inhibition index of 95 or more in JIS L 1950-1.

According to the present invention, it is possible to effectively prevent blood sucking by insects and improve wearing comfort.

Hereinafter, embodiments of the present invention will be described in detail. The present invention is not limited to the following embodiments.

Further, in the present invention, the blood-sucking insect means an insect that sucks blood from humans and animals such as mosquitoes, abs, gnats, ticks, and yamabils.

The insect repellent cover of the present invention is a cover made of a fabric containing at least a part of fibers containing an insect repellent.

<Fiber>
The resin constituting the fiber is not particularly limited, and for example, polyolefins such as polypropylene and polyethylene, polyesters such as polyhexamethylene terephthalate, polylactic acid and polycaprolactone, polyamides, and thermoplastics such as ethylene-vinyl alcohol-based copolymers. Resin can be mentioned.

The form of the fiber is not particularly limited, and multifilaments, monofilaments, and mixed fiber yarns in which these are mixed can be used.

Comparing multifilament and monofilament, the fabric made from multifilament is more supple and drapes, and is less irritating to the skin, but when worn, it becomes easier to adhere to the skin and clings to it. In some cases. On the other hand, monofilament has low drape and tends to be bulky, so that contact with the skin is limited when worn and there is little clinging, but the irritation to the skin is relatively high.

Furthermore, with monofilament fabrics, gaps are likely to form between the skin and the fabric, and as a result, blood-sucking insects such as mosquitoes landing on the fabric do not reach the skin and become a physical barrier, so from the perspective of insect repellent. Is preferable.

The fineness of the fibers constituting the fabric of the present invention is preferably 10 to 50 dtex. If it is larger than the above upper limit value, it may be difficult to obtain the lightness of the fabric, and if it is smaller than the above lower limit value, the cost may be high.

The fibers constituting the present invention can be produced by a usual melt spinning method. An insect repellent can be kneaded into the raw material thermoplastic resin in advance by using, for example, the method described in Japanese Patent No. 396341.

<Insect repellent>
The fabric of the insect repellent cover of the present invention contains an insect repellent and can repel blood-sucking insects such as mosquitoes. The type of this insect repellent is not particularly limited, and icaridin, DEET, and pyrethroid insect repellents, which are less irritating to the skin, may be used in consideration of being worn on the bare skin of the human or animal body. it can. Of these, icaridin and DEET, which have low irritation to the skin and are approved by the Ministry of Health, Labor and Welfare for insect repellent use, are preferable, and icaridin, which has a lower steam pressure and a lower evaporation rate than DEET, is more preferable. It is particularly preferable because it can be expected to have an insect repellent effect for a long period of time. These insect repellents may be used alone or in combination of two or more.

The content of the insect repellent in the dough is not particularly limited ^{, but is preferably 0.1 to 4.0 g / m 2} , more preferably 0.2 to 1.0 g / m ² . If the content is less than the above lower limit, the repellent performance of blood-sucking insects such as mosquitoes may not be sufficiently exhibited, and if it is more than the above upper limit, it may be contained in the resin constituting the fiber. When producing fibers by kneading an insect repellent, it may be difficult to produce fibers for obtaining a dough having a texture of ^{20 g / m 2 or less.}

The insect repellent may be attached to the surface of the fabric or kneaded into the resin constituting the fiber. If it is only attached to the surface, it will evaporate easily and the insect repellent effect will be exhibited for a limited period, but if it is kneaded into the raw material fiber, it will evaporate gradually over a longer period of time. , The period during which the insect repellent effect is exhibited is long, which is preferable. Further, it is preferable that the insect repellent is kneaded into the fiber rather than applying the insect repellent by post-processing because the effect of stickiness by the insect repellent is small.

<Fabric>
The fabric of the insect-proof cover of the present invention may be a fiber molded product made of a woven fabric, a knitted fabric, a non-woven fabric, or the like. Further, from the viewpoint of lightweight feeling when worn and wearing comfort due to high breathability, the opening ratio of the fabric is 40% or more, preferably 50% or more. The upper limit of the opening degree is not particularly limited, but 90% or less is preferable, and 80% or less is more preferable in terms of the design of the fabric. The aperture ratio can be obtained by the method described later.

As described above, in the insect repellent cover of the present invention, the action of the insect repellent contained in the fabric and the structure that does not allow the physically blood-sucking insects to come into contact with the skin effectively prevent the insects from sucking blood. Can be done. More specifically, in the above-mentioned JIS L 1950-1 (mosquito repellent test method by the attracted blood sucking device method), the highest rank classification performance (classification symbol E95 + with a mosquito blood sucking prevention index of 95 or more) is exhibited. Can be done.

In addition, since the aperture ratio is 40% or more, it is possible to obtain a feeling of lightness when worn and wearing comfort due to high breathability.

In addition, the fabric of the insect-proof cover of the present invention has a higher aperture ratio and excellent breathability as compared with the fabric for ordinary clothing, so that the wind easily passes through the skin surface and a refreshing feeling due to sweating and transpiration. It may be obtained and, depending on the environment, may feel cooler than when the insect-proof cover of the present invention is not worn. This is because when the insect-proof cover of the present invention is worn, the amount of water on the skin surface is slightly higher than when it is not worn, and due to the high air permeability, the water vaporizes at once, resulting in heat of vaporization. It is presumed that this is because the temperature of the skin drops significantly, and the skin feels temporarily cooler than the constant skin control state due to sweating and transpiration when not worn.

The basis weight of the fabric is preferably ^{20 g / m 2} or less from the viewpoint of light weight when worn. Compared to the basis weight of ordinary underwear, which is 80 to 200 g / m ^2, it is much lower and lighter. By setting the basis weight of the fabric to 20 g / m ² or less, a comfortable wearing feeling can be obtained without feeling the weight even when it is attached as an insect repellent cover. The basis weight is ^{more preferably 15 g / m 2} or less, further preferably 10 g / m ^{2 or less.} The lower limit of the basis weight is not particularly limited, ^{but is preferably 2} g / m 2 or more, and more preferably 3 g / m ² or more. The basis weight can be obtained by the method described later.

In the case of woven fabric, the fabric can be manufactured on a normal loom. A fiber containing an insect repellent may be used for both the warp and the weft, or a fiber containing an insect repellent may be used for either the warp or the weft. In the case of knitted fabrics, fibers containing insect repellent can be used to produce knitted fabrics by methods such as warp knitting, circular knitting, and weft knitting. In the case of a non-woven fabric, a non-woven fabric can be produced by, for example, a spunbond method using a resin containing an insect repellent.

Hereinafter, the present invention will be described based on examples. The present invention is not limited to these examples, and these examples can be modified or modified based on the gist of the present invention, and these examples are excluded from the scope of the present invention. is not it.

(Example 1)
First, polypropylene (manufactured by Prime Polymer Co., Ltd., product name: J-700GP), Septon 2014 (manufactured by Kuraray Co., Ltd., product name: SEPS2104) and icaridin (manufactured by LANXESS, product name: sultidine) were added to 70/15 / The polypropylene was kneaded at a mass ratio of 15 using a twin-screw kneader to obtain polypropylene containing 15% by mass of icaridin.

Next, this icaridin-containing polypropylene and polypropylene (manufactured by Prime Polymer Co., Ltd., trade name: J-700GP) are mixed at a mass ratio of 1/2, and a monofilament having a fineness of 39 dtex is produced by conventional melt spinning. Made.

Next, using the four monofilaments produced, a tubular knitted fabric having a diameter of about 10 cm was obtained with a flat knitting structure using a circular knitting device. The content of icaridin in this tubular knitted fabric was 3.9% by mass, which was ^{0.35 g / m 2.}

<Calculation of aperture ratio>
In a dough placed on a flat surface (a dough that is spread by cutting one end of the produced tubular knitted fabric), a tension of 1 N per 10 cm width is applied in the orthogonal warp and weft direction, and the dough surface is observed from the vertical direction, and the unit area of the dough in S, the area S ₁ that is covered by fibers, covered have not determined the area S ₂ of the opening, the following formula (1), was determined aperture ratio with (2). The above results are shown in Table 1.

[Number 1]
S = S ₁ + S ₂ (1)

[Number 2]
Aperture ratio (%) = (S ₂ / S) x 100 (2)

<Metsuke calculation>
Using the fabric used in the calculation of the aperture ratio, ^{the weight W (g) per unit area S (m 2} ) was measured, and the basis weight was determined using the following formula (3). The above results are shown in Table 1.

[Number 3]
Metsuke (g / m ² ) = W / S (3)

<Mosquito repellent test by attracting blood sucking device method>
Next, the initial blood-sucking inhibition index of the prepared tubular knitted fabric was measured according to JIS L 1950-1. The above results are shown in Table 1.

<Wearing feeling evaluation>
The following tests were carried out on the produced tubular knitted fabric to evaluate the wearing feeling. The above results are shown in Table 1.
-Wearing target: 10 people-Wearing environment: Environmental temperature; Approximately 30 ° C, Relative humidity; Approximately 60% RH, Wearing time; 1 hour-Evaluation points: Breathability, lightness, non-cling due to sweating, ease of movement , And the softness of the skin were evaluated respectively, and evaluation points were given according to the following criteria.

All of the above 5 items are excellent ... 5 points Of the above 5 items, 4 items are excellent ... 4 points Of the above 5 items, 3 items are excellent ... 3 points 2 of the above 5 items Is excellent ... 2 points Of the above 5 items, 1 item is excellent ... 1 point All of the above 5 items are not excellent ... 0 points

-Judgment: The evaluation points of 10 people were totaled, 40 points or more were evaluated as ⊚, 30 to 39 points were evaluated as 〇, 20 to 29 points were evaluated as Δ, and 19 points or less were evaluated as ×.

<Sustainability evaluation>
In the mosquito-proof test by the above-mentioned attracted blood-sucking device method, when the fabric corresponds to the classification symbol E95 + with an initial blood-sucking inhibition index of 95 or more, it is taken out from the sealed package in accordance with JIS L1950-1. It was exposed to an environment of a temperature of 25 to 30 ° C. and a relative humidity of 50 to 70% RH, and the blood-sucking inhibition coefficient was measured after one month, and the sustainability of the blood-sucking inhibition effect was evaluated according to the following criteria. The above results are shown in Table 1.

Blood sucking prevention index after 1 month is 95 or more (classification code E95 +) ... ◎
Blood-sucking inhibition index after 1 month is 80 or more and less than 95 (classification symbol E80) ... 〇 Blood-sucking inhibition index after 1 month is 50 or more and less than 80 (classification symbol E50) ... △
Blood sucking inhibition index after 1 month is less than 50 (classification code E50-) ... ×

(Example 2)
Using only polypropylene containing 15% by mass of icaridin obtained in Example 1 above, a monofilament having a fineness of 33 dtex was produced by conventional melt spinning.

Next, using the four monofilaments produced, a tubular knitted fabric having a diameter of about 10 cm was obtained with a flat knitting structure using a circular knitting device. The content of icaridin in this tubular knitted fabric was 12.8% by mass, which was 0.46 g / m ² .

Then, in the same manner as in Example 1 described above, the aperture ratio was calculated, the basis weight was calculated, the mosquito repellent test by the attracted blood sucking device method, the wearing feeling evaluation, and the sustainability evaluation were performed. The above results are shown in Table 1.

(Example 3)
A tubular knitted fabric having a diameter of about 10 cm was obtained in the same manner as in Example 1 described above, except that the number of gauges of the flat knitted structure was increased. The content of icaridin in this tubular knitted fabric was 3.9% by mass, which was ^{0.98 g / m 2.}

(Example 4)
A commercially available polyester multifilament (fineness 22dtex) tricot mesh fabric (25 g / m ² , aperture ratio 53%) is subjected to gravure printing on the entire surface using an ethanol solution containing 5% by mass of icaridin. , A mesh dough processed with icaridin was obtained.

The content of icaridin in this mesh dough was 2.5% by mass, which was ^{0.63 g / m 2.}

(Example 5)
Similar to Example 1, first, polypropylene containing 15% by weight of icaridin was obtained. Next, this icaridin-containing polypropylene and polypropylene (manufactured by Prime Polymer Co., Ltd., trade name: J-700GP) are mixed at a mass ratio of 1/2, and mulch with a fineness of 44 dtex / 24 filaments is obtained by conventional melt spinning. Filaments were made.

Next, using the four multifilaments produced, a tubular knitted fabric having a diameter of about 10 cm was obtained with a flat knitting structure using a circular knitting device. The content of icaridin in this tubular knitted fabric was 3.1% by mass, which was ^{0.38 g / m 2.}

(Comparative Example 1)
A tubular knitted fabric having a diameter of about 10 cm was obtained in the same manner as in Example 1 described above, except that the number of gauges of the flat knitted structure was further increased from that of Example 3. The content of icaridin in this tubular knitted fabric was 3.9% by mass, which was ^{1.01 g / m 2.}

As shown in Table 1, in the tubular knitted fabrics of Examples 1 to 5, since the opening ratio of the fabric is 40% or more, it can be seen that the fabric is lightweight, has high air permeability, and is excellent in wearing comfort. Furthermore, since icaridin, which is an insect repellent, is kneaded into the resin that constitutes the fiber, it has the highest rank of classification performance (mosquitoes) in JIS L 1950-1 (mosquito resistance test method by the attracting blood sucking device method). It can be seen that the blood-sucking inhibition index of 95 or more can be exhibited, and the blood-sucking inhibition effect is excellent in sustainability.

In addition, in Example 3, since the basis weight of the fabric ^{is larger than 20 g / m 2,} it can be seen that a comfortable wearing feeling can be obtained although the wearing feeling is lower than that of the other Examples.

Further, in the tubular knitted fabric of Comparative Example 1, since the opening ratio of the fabric is less than 40%, it can be seen that the air permeability is low and the wearing feeling is lowered when the fabric is attached.

As described above, the present invention is an insect repellent cover for preventing blood sucking by blood-sucking insects such as mosquitoes, and is suitable for parts where the skin is exposed such as arms, hands, feet, and neck. Available. Further, the insect repellent cover of the present invention can be applied not only to humans but also to animals such as dogs and cats that are the targets of blood-sucking insects.

Claims

It consists of a fabric that contains at least a part of fibers containing insect repellent.
An insect repellent cover having an aperture ratio of 40% or more.
The insect repellent cover according to claim 1, wherein the fabric has a basis weight of 20 g / m 2 or less.
The insect repellent cover according to claim 1 or 2 , wherein the content of the insect repellent in the dough is 0.1 to 4.0 g / m 2.
The insect repellent cover according to any one of claims 1 to 3, wherein the insect repellent is kneaded into the resin constituting the fiber.
The insect repellent cover according to any one of claims 1 to 4, wherein the insect repellent is icaridin.
The insect repellent cover according to any one of claims 1 to 5, wherein the fiber is a monofilament.
The insect repellent cover according to any one of claims 1 to 5, wherein the fiber is a multifilament.
The insect repellent cover according to any one of claims 1 to 7, wherein the fabric corresponds to the classification symbol E95 + having a mosquito blood-sucking inhibition index of 95 or more in JIS L 1950-1.