JPS5919534A - Continuous supply of volatile substance - Google Patents

Abstract

PURPOSE:To prevent the leakage of the liquid in a container to the outside when the container is turned over, by holding a volatile liquid in a container of which at least the upper surface or the side surface is constituted of a gas permeable but liquid impermeable material. CONSTITUTION:A volatile liquid 2 is contained in a container of which at least the upper surface or the side surface is constituted of gas permeable but liquid impermeable material 3. In this case, the volatile liquid 2 is at least one kind of substance selected from insecticides (e.g., pyrethroid type insecticides, org. phosphorus insecticides), harmful organism repellents (e.g., di-n-propylisocinchomeronate) and perfumes. In addition, the gas permeable and liquid impermeable material is obtained by a method wherein an oriented sheet comprising thermoplastic resin such as polyethylene containing 40-85wt% inorg. filler is pref. used and oriented uniaxially or biaxially within a range of 50-500% in volumetric draw ratio. In addition, as the above inorg. filler, oxide of Ca with an average particle size of about 0.1-100mum is used.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously supplying volatile substances. Specifically, this is a method in which a volatile liquid is stored in a container with a specific structure, so that the vapor characteristics of the liquid are fully exhibited.

Volatile substances include deodorizers for refrigerators, cupboards, sideboards, etc.; air fresheners for cars and homes;
It is widely used as an agricultural insecticide. Conventionally, the above-mentioned substances were absorbed by themselves or as a solution into a carrier such as activated carbon or zeolites, and the volatile active ingredients were gradually released from the carrier and supplied into the surrounding atmosphere to achieve their respective purposes. Alternatively, a method is used in which a gaseous active ingredient is supplied to the atmosphere by a spray method. However, when absorbing into a carrier, there is a limit to the amount and pressure of the liquid that can be retained, and moreover, depending on the type and pore size of the carrier used,
The absorption rate and liquid holding power of the solution are different, and the disadvantage is that it is generally difficult to completely release the absorbed liquid, and the period during which a constant release rate can be maintained is short. Furthermore, the spray type cannot be expected to last long, and the gas used in the trap to apply pressure is sometimes harmful, and there are also problems when disposing of the iron. Recently, a volatile liquid is stored in a container, the top of the container is opened, and from the opening,
Some devices are intended to volatilize a liquid through a porous member or the like and diffuse it into the atmosphere. A similar method involves storing a volatile liquid in a container, inserting a wick such as a sponge into the container, and utilizing capillary action to absorb the liquid into the wick and vaporize it in the evaporation section at the top. There are some things.

In these methods, the liquid in the container can be utilized almost completely. Moreover, since the presence or absence of the solution can be visually observed, volatile substances can be easily replaced.

However, in these methods, the opening of the container is only a porous material such as a sponge, so if the container falls over due to carelessness during handling, the solution stored inside may leak and be lost. In addition, it has the disadvantage of causing stains.

It can also be dangerous, especially if the liquid contains harmful ingredients. The present invention provides a method for continuously supplying a volatile substance by storing a volatile liquid in a specific container. This is a method for continuously supplying a volatile substance by storing a volatile liquid in a container constructed of.

Since a part of the container used in the present invention is made of an air-permeable and liquid-impermeable member, the liquid containing the active ingredient inside evaporates and passes through the member to the surrounding area. Disperses into the atmosphere. However, since the member is liquid-impermeable, even if the container falls over, the liquid inside will not leak out of the container.

One of the features of the present invention is that at least a portion of the container is made of an air-permeable and liquid-impermeable member. A member having such properties is generally a gas permeable film, but a film having a very low gas permeability function is not suitable for the present invention. The above-mentioned member used in the present invention generally has a test time of about 10 to 300 seconds, particularly preferably about 30 to 200 seconds, depending on the Gurley measuring method. Also, liquid impermeability means
The liquid does not seep out even under a pressure difference of about 10 G of water column. A common member having such properties is a microporous membrane. Depending on the relationship with the liquid normally used, the pore size may be larger for materials that are less wettable, but from 1 to 100 μm.
This is a member that has a large number of holes with a diameter of approximately For example, when the target is a highly polar liquid such as an aqueous solution, a porous membrane made of a material with low polarity such as polyolefin is preferable; In such cases, materials with low surface activity such as highly polar materials or fluororesins are preferred.

The above paulownia is not particularly limited, but a cloth-like material or a stretched sheet of thermoplastic resin containing 35% or more, preferably 40 to 85% by weight of an inorganic filler is suitably used. H・Karu stretched sheet is made of polyethylene, boria'
Polyolefins such as l-pyrene, polyvinyl chloride.

A sheet-like product is obtained by incorporating a predetermined amount of inorganic filler into a thermoplastic resin such as polyester or polyamide, and this is stretched at a volumetric stretching ratio of 50 to 500%.

It is preferably obtained by uniaxially or biaxially stretching in a range of 200 to 400%.

The inorganic filler generally has an average particle size of 0.1 to 10
Calcium with 0μ special K O, about 5 to 20μ, -
qGnesium, aluminum.

Inorganic compounds such as oxides, hydroxides, salts, etc. of silicones are preferably used. The stretched sheet obtained in step 5 has fine pores and is excellent in air permeability and liquid impermeability. Note that in this specification, the term "sheet" does not have a strict meaning in terms of thickness, but also includes a film.

Any volatile substance that can be used in the present invention can be used as long as it satisfies the above requirements.

In general, if the drug is liquid, it is used as it is, or if it is solid, it is used in the form of a solvent solution or an aqueous dispersion. As the agent, for example, known agents such as insecticides, pest repellents, fragrances, deodorants, rust preventives, freshness-preserving agents, anti-smoking agents, and fungicides can be used.

As insecticides, biresuride insecticides, organosun insecticides, and synthetic carbamic acid insecticides are generally used. In addition, as a pest repellent, 2,3,4,5-bis(△
2-butylene)-tetrahydrofurfural, di-normal-propyleneminecomeronate.

Di-normal loose succinate, 2-hydroxyethyl octyl sulfite, pyrimidine enzyme conductor 2-morpholine inhibitor INi or 2-yu are commonly used together, and among them, 2.3,4.5-bis (△, -butylene)
-Tetrahydrofurfuralruinmine comepnate is preferably used. Further, as fragrances and sheets used in aromatic agents and deodorants, known fragrances such as vetiver oil, jasmine abunroot, quechigueryl 7 sedate, and lemon oil can be used without particular restriction. Acetone is also used as a solvent.

Known materials such as methanol, ethanol, ether, benzene, and toluene can be used.

Further, the ratio of water or solvent to the L substances may be arbitrarily selected depending on the characteristics of each substance.

Hereinafter, the present invention will be explained in detail with reference to the drawings, but the present invention is not limited to the drawings.

FIG. 1 is a front view showing a typical configuration of a container used in the present invention. Figure 1 (in which ↓ is a container,
A breathable and liquid-impermeable member 3 that stores a volatile liquid 2
1C constitutes at least a part of the top surface or side surface.

In the present invention, the container 1 may have at least a portion of its upper surface or side surface made up of an air-permeable and liquid-impermeable member 3, and the other portion may be made of a liquid-impermeable member 4. Liquid-impermeable materials can be used without any particular restrictions. For example, paper coated or laminated with plastics such as polypropylene, polyethylene, and polystyrene, glass, resin, or liquid-impermeable materials is generally used. Container 1 using the above-mentioned members
There are no particular restrictions on the manner in which it is constructed, but in general, as shown in FIG. It is preferable to attach by means of fusing, clamping, etc. It is preferable that the container 4 having the opening is made of a transparent or semi-transparent member so that the inside can be seen through. In addition, although the above-mentioned aspect showed the aspect which comprised a part of the container 1 with the breathable and liquid-impermeable member 3, the container 1 can also be comprised entirely with this member. It is also preferable to use a porous outer container 6 having a plurality of holes 5 as shown in FIG.

Further, in the present invention, as shown in FIG. 1, it is preferable to use a lid 7 or the like on the air permeable and liquid impermeable member 30 portion to provide an airtight structure.

With this structure, the liquid inside can be stored without volatilizing even when not in use. Also, the opening l of the lid 7
Volatile components can also be controlled by the degree of

By using the method of the present invention, sufficient effects are exhibited in the various uses mentioned above.

For example, a container like the one shown in Figure 1 has an opening at the top of 57 and an internal volume of 100m+! A mixed solution consisting of 5 parts of 2,3,4.5-bis(△,-butylene)-tetrahydrofurfural (trade name Zipper-1l1, manufactured by Yoshitomi Pharmaceutical Co., Ltd.) and 100 parts of 77 tons was placed in a glass container. 90m
Contains a breathable, liquid-impermeable material (70 parts by weight of calcium bicarbonate).

Using pellets made by adding small amounts of stabilizers and plasticizers to 30 parts by weight of Volip-P pyrene, a sheet obtained through an extruder was biaxially stretched at a temperature of 120"C to a thickness of 100 microns. When I left the above-mentioned opening glued with a container with an average pore diameter of 2 microns and left it in the kitchen, no cockroaches were seen for about 3 months.In addition, in a similar container, I dissolved a vegetable fragrance in 95% ethanol. When I added the scented product, the scent lasted for about 3 months.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a typical aspect of the container used in the present invention, and FIG. 2 is a perspective view showing another aspect of the container of the present invention. In the figure, ↓ is a container and 2 is a volatile liquid. 3 is a breathable and liquid-impermeable part side, 4 is a liquid-impermeable container,
5 is a hole, 6 is an outer container, and 7 is a lid. Patent applicant: Tokuyama Soda Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] (1) A method for continuously supplying a volatile substance by storing a volatile liquid in a container whose upper side or at least a portion of the side surface is made of an air-permeable and liquid-impermeable member. (2) The method according to claim 1, wherein the volatile substance is at least one selected from insecticides, pest repellents, and fragrances. (3) The insecticide is biresuride insecticide or organic phosphorus. The method (4) according to claim 2, wherein the pest repellent is a 2+L4,5-bis(△2-tecoz≠ren)-tetrahydrofurfural or di-normal loop ρ biruinmine rice p The method according to claim 2, which is