JPH03294514A - Polyvinyl alcohol-based fiber having insecticidal effect, fiber sheetlike material and dust collecting bag using the same fiber - Google Patents

Abstract

PURPOSE:To obtain PVA-based fiber having insecticidal effects and excellent durability thereof free from damage, falling off, scattering of chemical during fiber processing and use, containing 2-(p-ethoxyphenyl)-2-methylpropyl-3- phenoxybenzyl ether. CONSTITUTION:A spinning dope having dissolved PVA is blended with 2-(p- ethoxyphenyl)-2-methylpropy-3-phenoxybenzyl ether, spun from a nozzle to give PVA fiber containing 2-(p-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether (preferably 5-40wt.% based on weight of fiber). Preferably >=5wt.% of the fiber is woven or knitted to give a fiber sheet, which is processed to give a dust collecting bag for cleaner.

Description

[Detailed description of the invention] <Industrial application field> The present invention is applicable to daily necessities, interior goods, agricultural goods,
This invention relates to 1m fibers and textile products that are mainly used in environments where pests and diseases can easily inhabit and access, such as marine products, and which have an extremely high insect repellent effect.

<Prior art> Textile products used in fields where the inhabitation and access of pests and diseases are disliked include 1. For example, daily MM items such as clothing storage boxes;
Interior goods such as carpets, agricultural goods such as fruit bags,
There are various items such as fishing nets and other marine products.

If pests inhabit or come into contact with such textile products, for example, if a clothing storage box is used, the clothing may be eaten by cockroaches, fly larvae, etc., or if a carpet is used, the clothing may be damaged by fleas, mites, ants, etc., which may cause harm to the human body. However, in the case of fruit bags, it causes major problems such as diseases caused by leafhoppers, aphids, etc. and a decrease in product value.

Conventionally, the following methods have been adopted as measures to protect textile products from the inhabitation and access of such pests.

The most common method is to post-treat textile products with volatile insect repellents such as II phosphorus, pyrethroids, nicotine, rotinone, etc. Specifically, this method involves impregnating textile products with the chemicals. . However, with these methods, there is a strong unpleasant odor or irritating odor during the impregnation process, and since the chemical is just attached, it is extremely volatile and lacks long-lasting effects. An even bigger drawback is that since the volatilization rate of these drugs cannot be controlled, large amounts of these drugs volatilize into the air, causing disorders such as nervous system inhibition and respiratory inhibition in the human body. Particularly recently, there have been reports that chemicals processed in air bags for vacuum cleaners are scattered throughout the room by the vacuum cleaner's suction and exhaust, resulting in an abnormally high concentration of chemicals, which may have a negative impact on the human body.

As a means to compensate for this drawback, there is a method of microcapsulating the above-mentioned drug and attaching it to fibers using an oil-resin binder or the like to produce textile products. With these methods, it is possible to control the volatilization rate of the drug to a certain extent, so the duration of the effect is longer. Friction during the processing process - 1 has the disadvantage that the chemical may be damaged or fall off due to bending, pulling, friction, washing with water, etc. during use. Furthermore, when used in an air bag for a vacuum cleaner, the drug is scattered along with the microcapsules,
As with impregnation, indoor and human body contamination still occurs.

Here, a method can be considered in which the insect repellent is contained inside the fiber to control the sustainability of the effect and to obtain the ability to prevent scattering of the chemical. However, this study has not been carried out at all to date.The reason for this is that the sublimation and decomposition temperatures of the known chemicals mentioned above are generally extremely low, below 80°C, and the manufacturing temperature of conventional synthetic fibers is extremely low. One example of this is that mixed spinning cannot be performed because it cannot withstand water. Furthermore, even if it is possible to mix it with synthetic fibers that have a low manufacturing temperature, such as modified polyethylene, the effect is expressed by volatilization of the chemical, so after the chemical near the fiber surface volatilizes, the chemical that exists inside the fiber will be absorbed. Since objects cannot be moved, they do not contribute to the effect, and the effect lacks sustainability.

As mentioned above, it contains insect repellent inside the fiber.
Until now, safe fibers with extremely high insect repellent effects and long-lasting effects, and with little concern about chemicals being damaged, falling off, or scattering during fiber processing and use, and textile products using the same, have not been obtained.

<Problems to be Solved by the Invention> The present invention provides fibers that are extremely excellent as fibers constituting textile products that are used in environments where pests and pests easily inhabit and are easily accessible. The aim is to provide safe fibers that are extremely effective and long-lasting and have little concern about chemicals being damaged, falling off, or scattering during fiber processing and use, and textile products using the same.

<Means for Solving the Problems> The object of the present invention is to solve the problems by
A polyvinyl alcohol fiber having an insect repellent effect, characterized by containing methylpropyl-3-phenoxybenzyl ether inside the fiber.

Alternatively, this can be achieved by using a fiber sheet material containing 0.5% by weight or more of this fiber.

Further, a vacuum cleaner dust bag containing 0.5% by weight or more of the fiber of the present invention is extremely effective from the viewpoint of high insect repellent effect and safety in that it causes little indoor and human body contamination.

The insect repellent used in the present invention is 2-(p-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether, which is commonly known as Tofenbrox and is extremely harmful to the human body. It has been shown to have low toxicity, and in recent years it has begun to be used for treatments such as dripping, spraying, and impregnation.

As a result of studies by the present inventors, the fibers to be mixed with 2-(p-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether are as follows.

It has become clear that polyvinyl alcohol-based fibers are the most superior in terms of expression and sustainability of the insect repellent effect, as well as ease of fiberization.

That is, when 2-(p-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether is mixed and spun into hydrophobic fibers such as polyethylene, it does not exhibit any insect repellent effect; Encapsulated 2-(p-ethoxyphenyl)-2-
This is because methyl 10-pyl-3-phenoxybenzyl ether does not migrate to the fiber surface. On the other hand, when mixed with polyvinyl alcohol and spun, an effective effect is exhibited and the effect is long-lasting. Although the details of the reason for this are unknown, polyvinyl alcohol fibers are extremely hydrophilic with an official moisture content of 5%, so when moisture in the air is absorbed or released, the moisture present inside the fibers It is presumed that this is because 2-(p-ethoxyphenyl)-2-methyl 10vyl-3-phenoxybenzyl ether gradually migrates to the fiber surface and exerts its effect over a long period of time. If you have a similar idea, for example, the official moisture content is 4
It is also proposed to mix with 5% nylon fiber, but 2
-(p-ethoxyphenyl)=2-methylpropyl-3
- Phenoxybenzyl ether has a decomposition temperature of 230°C, and sublimation becomes intense from around 160°C, so it cannot be mixed with ordinary nylon fibers, which have a high spinning temperature.
On the other hand, the spinning temperature of polyvinyl alcohol fibers is 100°C or lower, and even when heat treatment is applied, 2-(p-
It is possible to carry out the reaction at a temperature below the decomposition temperature of ethoxyphenyl-2-methyl 70vir-3-phenoxybenzyl ether.

As mentioned above, 2-(p-ethoxyphenyl)
It has been revealed that only when -2-methylpropyl-3-phenoxybenzyl ether and polyvinyl alcohol fibers are combined, a high insect repellent effect and its sustainability are exhibited, and the fiberization is also easy.

Next, as a method for incorporating 2-(p-ethoxyphenyl)-2-methylpro and -3-phenoxybenzyl ether into polyvinyl alcohol fibers, 2-(p-ethoxyphenyl)-2-(p-ethoxyphenyl) )-2-Methylpropyl-3-phenoxybenzyl ether is mixed and spun by discharging the mixture from a nozzle.

In this case, the content is 1% by weight based on the weight of the fiber.
If it is less than 70% by weight, the insect repellent effect will be low, and if it is more than 70% by weight, the spinnability will be significantly impaired, so the content is preferably 1 to 78% by weight, more preferably 5 to 40% by weight.

The spinning method is polyvinyl alcohol type l1111i.
Wet or dry spinning methods that are generally known for this purpose may be mentioned. The resulting spun yarn can be set at a water dissolution temperature of 40°C or higher, and can be selected as appropriate depending on the application.For example, when used as a binder fiber for papermaking, the yarn can be used as it is or after a light heat treatment. Usually 40-9
The temperature is set at 0°C, and the temperature is usually set at 90 to 110°C when sufficient form stability is required for use in, for example, yarn, cotton, m-material fabrics, pile fabrics, nonwoven fabrics, paper, etc.

Stretching and heat treatment may be used as a means to impart sufficient strength, morphological stability, and water resistance. Both methods may be generally known, but preferred conditions may be used. As shown, the stretching/heat treatment temperature is 200 to 230
℃, stretchability and 2-(p-ethoxyphenyl)~2
- More preferably 210 to 220°C considering the decomposition temperature of methylpropyl-3-phenoxybenzyl ether
It is. It is desirable that the stretching ratio is 4 times or more, especially 7 to 18 times, in order to obtain sufficient fiber strength.Other methods include acetalization with aldehydes such as formaldehyde and acetaldehyde; Regarding the conditions of the case, generally known methods may be used.
For example, 2 to 10% by weight of formalin [2 to 10% by weight in an acidic solution]
After soaking at 0 to 90°C for several minutes to several tens of minutes, it is washed with water and dried.

Regarding the form of the fiber, the insect repellent effect is not particularly related to the thickness of the fiber, and can be freely adjusted within the range of 05 to +01][1[1 denier. Appropriate selection is made depending on the purpose, such as supplies, marine products, industrial supplies, etc. In particular, it is preferable to use the wet spinning method for the range of 05 to 50 deniers, and the dry spinning method for the range of 3 to 10,000 deniers.

The polyvinyl alcohol-based fibers obtained by adopting the above method have extremely high insect repellent effects and long-lasting effects when used in environments where pests inhabit or are easily accessible. The chemical will be less likely to be damaged, fall off, or scatter.

In particular, when used as a binder fiber for papermaking, it is not simply a combination of ordinary polyvinyl alcohol binder fibers and insect repellent effects, but the effective range is expanded because the fibers form a film during papermaking, compared to when used as the main fiber. It is possible to make it effective at a low blending ratio.

The polyvinyl alcohol fiber having an insect repellent effect of the present invention may contain other additives, antibacterial agents, processing agents, modifiers, etc. as necessary. In the present invention, the term "fiber" refers to A general term for filaments, single fibers, twisted yarns, processed yarns, spun yarns, etc. of these filaments.

Possible forms of the fibrous sheet containing polyvinyl alcohol fibers having an insect repellent effect according to the present invention include general woven fabrics, knitted fabrics, braided fabrics, nonwoven fabrics, paper, and artificial leather. The fiber content is effective at 0.5% by weight or more in normal applications, but in consideration of sufficient effects, it is more preferably 5% by weight or more, and the content should be increased as appropriate, especially when used in places where pests are likely to inhabit. let Other fibers constituting the fiber sheet include natural fibers such as pulp, hemp, cotton, silk, and wool, compounds such as rayon, nylon, vinylon, polyester, acrylic, polyethylene, and inorganic materials such as glass, metal, and carbon. Fibers and the like that are generally known may be used, and the method for manufacturing the sheet-like material may be any of the commonly known methods such as a paper making method, an air-laid method, a card method, a needle punch method, a spunlace method, etc.

Next, regarding the air layer bag for vacuum cleaners containing polyvinyl alcohol fibers having an insect repellent effect according to the present invention, the main performance requirements include high dust collection efficiency during suction and high strength. However, there are restrictions on the fibers that make up the bag, as well as its form and manufacturing method. The fibers include, for example, pulp, hemp, rayon, polyester, vinylon, microglass, etc., and the manufacturing method and form are wet-paper-made paper.The content of the fibers of the present invention is the aforementioned general fibers. As in the case of the sheet-like material, the content is 0.5% by weight or more, more preferably 5% by weight or more, and the blending ratio of other fibers is appropriately selected in consideration of reagent efficiency and the like.

As described above, the fibrous sheet-like product of the present invention (1) is a chemical dust bag for a vacuum cleaner, compared to conventional insect repellent impregnated or micro-encapsulated insect repellent. The insect repellent effect is extremely long-lasting, and indoor and human body contamination due to chemical scattering is extremely low.

In the present invention, specific fiber IIW products using polyvinyl alcohol fibers having an insect repellent effect include Cleaning IIW
*II! In addition to H, for example, clothing wrapping paper.

Daily goods such as closet storage boxes and grocery bags, and their fabrics; Interior goods and fabrics, such as tatami underlay sheets, wallpaper, futons, and carpets; Agricultural supplies such as cheesecloth, fruit bags, and seedbed pots; and their fabrics. fabrics, fishing nets, biku,
It can be applied to marine products such as transportation cases and their fabrics.

The principles, embodiments, and effects of the present invention will be explained in more detail with reference to the following examples, but these examples are merely taken as examples, and these examples are not intended to limit the present invention in any way. do not have.

Note that the mite growth inhibition rate in the Examples was determined according to the following test method. That is, the mite culture medium was adjusted so that one individual Dermatophagoides chinensis survived in l + tg, and the 200
mg was placed in a glass Petri dish with an inner diameter of 40 m. The specimen is 2hg for fibrous material and 4Q in diameter for sheet material.
A +m circular cut was placed in the center of a glass petri dish. After culturing for 2 weeks at a constant temperature of 25° C., the mite medium was taken out from the glass Petri dish, surviving mites were extracted by the saturated saline suspension method, and the surviving mites were counted under a body type V & microscope. The mite growth inhibition rate was calculated using the following formula using the sample without the sample as a control.

Generally, it is determined that there is an insect repellent effect when the rate of inhibition of mite proliferation is 80% or more.

Example 1 Polyvinyl alcohol was made into an aqueous solution of 16% by weight, and oily 2-(p-ethoxyphenyl)-2-methylpropyl-
A spinning stock solution was prepared by mixing 20% by weight of 3-phenoxybenzyl ether with polyvinyl alcohol and uniformly dispersing it. This was discharged from a metal plate into a sodium sulfate solution, subjected to conventional wet spinning, dried, and then dry-heat stretched 7 times at 215°C to obtain a single fiber of 2 deniers and a water dissolution temperature of 99°C.

The mite proliferation inhibition rate of this fiber was 97.5%.

Example 2 Polyvinyl alcohol was made into an aqueous solution of 16% by weight, and oily 2-(p-ethoxyphenyl)-2-methylpropyl-
A spinning stock solution was prepared by mixing 20% by weight of 3-phenoxybenzyl ether with polyvinyl alcohol and uniformly dispersing it. This was discharged from a metal plate into a sodium sulfate bath, subjected to conventional wet spinning, and dried to obtain a binder fiber having a single fiber of 2 deniers and a water dissolution temperature of 60°C.

The mite proliferation inhibition rate of this fiber was 98.7%.

Comparative Example 1 High-density polyethylene chips were mixed with 20% by weight of oily 2-(p-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether based on polyethylene, melted at 150°C, and extruded from a metal plate. This was then subjected to conventional melt spinning to obtain a single fiber of 5 denyl.

The mite growth inhibition rate of this fiber was 36%.

Comparative Example 2 Oily 2-(p-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether was mixed with epoxy resin/
Microcapsules with an average particle diameter of 5 μm were prepared by amine interfacial polymerization method, and attached with an acrylic resin to a monofilament of 2 denier polyester fiber in an amount of 20% by weight.

The mite proliferation inhibition rate of this fiber was 946%.

The above Examples and Comparative Examples were made into sheets, and the following Tests 1 to 3 were conducted to investigate the durability of the insect repellent effect, washing resistance, and the degree of scattering of chemicals when used as a dust collection bag for a vacuum cleaner.

Test 1 The fibers obtained in Example 1 and Comparative Example 2 were spun to No. 10 in a conventional manner to form a plain weave at 50 fibers/45 fibers/inch.

A sustainability test of the insect repellent effect was conducted on the obtained sheet-like material.

The test method was to leave these sheet-like materials under constant temperature and humidity at 25° C., and evaluate the mite growth inhibition rate after 0, 1, 3, and 6 months.

If there is no decrease in the rate of inhibition of mite proliferation after leaving it, it is determined that the insect repellent effect is sustainable.

Test 2 The fibers obtained in Example 1 and Comparative Example 2 were spun to a number 10 in a conventional manner and made into a plain weave at a rate of 50 fibers/45 fibers/inch.

A washing resistance test was conducted on the obtained sheet-like material.

The test method is the JIS L0217-103 method, and the washing liquid is prepared by adding and dissolving 2 g of synthetic laundry detergent in 1 liter of 40°C water. A sample and, if necessary, a load cloth are added to this washing liquid so that the bath ratio is 1:30, and operation is started. After processing for 5 minutes, stop the operation, dehydrate the sample and load cloth, then change the washing solution to fresh water at room temperature, rinse for 2 minutes with the same bath ratio, dehydrate, and rinse again for 2 minutes. This is a method of drying in the air.

This test was conducted 50 times at 0.1O, and the rate of inhibition of mite growth was evaluated for each test.

If the mite growth inhibition rate does not decrease after washing, it is determined that the chemical has not been damaged or fallen off.

Test 3 The fibers obtained in Example 1 and Comparative Example 2 were each 3 mm thick.
It was cut into Single fiber M1 denier, fiber length 3cm polyester for papermaking, hemp for papermaking and single fiber 1 denier, fiber length 3
■The vinylon binder for paper manufacturing is mixed at a weight mixing ratio of insect repellent fiber/polyester/hemp/binder: 10:30:
50: In was mixed and disintegrated in a beater, and paper was made to have a basis weight of 60 g/cm.

Similarly, for Example 2, the weight mixing ratio of insect repellent binder fiber Ii/polyester/hemp was 10:30:60.
The paper was made with

Next, attach these papers to the exhaust port of a household vacuum cleaner, and
- The mite growth inhibition rate was evaluated after running for 30 and 180 minutes.

If there is no decrease in the mite growth suppression rate after operation, it is determined that there is no chemical scattering.

Reference Example Monofilament 2-denier polyester fibers were spun to a lO count using a conventional method to form a plain weave at 50 fibers/45 fibers/inch.

For this fabric, oily 2-(p-ethoxyphenyl)
-2-Methylpropyl-3-phenoxybenzyl ether was impregnated to a concentration of 20% by weight.

Regarding this, tests similar to Tests 1 to 3 were conducted to evaluate the mite proliferation inhibition rate.

Table 1 shows the mite growth inhibition rate of the insect repellent fibers and the mite growth inhibition rate in Tests 1 to 3.

From the results in Table 1, in the case of mixed spinning, the 2-(p
It is clear that only polyvinyl alcohol containing polyvinyl alcohol (-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether exhibits an effective insect repellent effect. In addition, the insect repellent effect and durability of the insect repellent polyvinyl alcohol fiber of the present invention and textile products using the same are extremely excellent, and there is extremely little damage, shedding, or scattering of chemicals during fiber processing and use. It is clear that it is a thing.

Margin below hand Continued Supplementary Positive book (method) %formula% (l　O8) Rillashi Co., Ltd. Director Nao Nakamura Co., Ltd. nine La Re July 31, 1990 Day Target of correction Type stamp A clearly written specification (21 page) Contents of correction Second specification originally attached to the application 1 page engraving.

As per attached sheet Change the content death)

Claims (3)

[Claims] (1) A polyvinyl alcohol fiber having an insect repellent effect, characterized by containing 2-(p-ethoxyphenyl)-2-methylpropyl-3-phenoxybenzyl ether inside the fiber. (2) A fiber sheet material containing 0.5% by weight or more of polyvinyl alcohol fibers having an insect repellent effect as set forth in claim 1. (3) A dust collection bag for a vacuum cleaner, which contains 0.5% by weight or more of polyvinyl alcohol fibers having an insect repellent effect as set forth in claim 1.