JPH05285206A - Container for gradual emission - Google Patents

Abstract

PURPOSE:To provide a container out of which an approximately fixed quantity of a volatile matter is emitted regardless of temperature. CONSTITUTION:A container is made of a material low in volume expansion coefficient. A mold 2 made of a material (for example, silicone rubber, etc.) high in volume expansion coefficient is plugged in the opening 1 of the container. A volatile matter such as an aromatic deodorizer, etc., is put in the container. Ventilation space 3 is provided inside a molded item or between the molded item 2 and the container. The ventilation space 3 is made in such a size that a proper quantity of volatile matter comes out of the container in winter. When air temperature goes high, it enlarges since the molded item 2 is high in volume expansion coefficient. But, since the opening 1 of the container is low in volume expansion coefficient, it does not enlarge. Accordingly, the ventilation space 3 becomes small. In the period when the air temperature is high, there are many volatile matters, but the ventilation space 3 becomes small, so the quantity of volatile matters coming out of the container becomes approximately constant throughout the year.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container which, when a substance which volatilizes from a substance contained in the container goes out of the container, makes it sustained-release. As the substance to be put in the container, there may be mentioned chemicals and fragrances from which the volatilized substance functions, such as aromatic deodorants for toilets and cars, insect repellents such as paradichlorobenzene, and fragrances such as potpourri. These chemicals and fragrances are volatilized from “volatile substances”,
Substances that actually function (that is, that actually smell or repel insects) will be referred to as "volatiles."

[0002]

2. Description of the Related Art Although many containers for volatile substances have a well-designed design, many do not consider the sustained release property. When you open the container of a fragrance disinfectant for a toilet or a car after purchase, the volatile substances inside will come out and give off a scent. The device for gradually releasing the volatiles in the container, that is, the device for sustained release is only to make the hole of the container small. With this container, the effect can last for 1 to 3 months. The size of the hole in the container is such that it smells like winter. Since there is a difference in temperature between summer and winter, the amount of the fragrance decontaminating agent volatilized differs greatly. In the summer, a lot of fragrance deodorants are volatilized, and they gradually come out through the small holes in the container. Therefore, the scent may be too strong, which may cause discomfort. In addition, when the amount of volatilization is large, the amount of the fragrance decontaminating agent decreases drastically. In the summer, you will soon have to replace it with a new fragrance deodorant. This point is a particular problem for the fragrance disinfectant to be placed in a vehicle with a large temperature difference between summer and winter.

Fragrance deodorants have been devised so that the holes in the container can be made smaller to provide some sustained release. However, no insect repellent has been devised in this way. When opened after purchase, the insect repellent begins to volatilize, giving off a strong odor. This is also good if it's a storage box for storing clothes for a long time. But like a wardrobe,
If you put this insect repellent in the chest that opens and closes every day, the original smell is so bad that you can't stand it. Also, since it opens and closes every day, the components of the insect repellent do not accumulate in the chest and flow out of the chest when opening and closing. Therefore, in summer when the temperature is high, the amount of insect repellent is severely reduced.

[0004]

[Problems to be Solved by the Invention] Regarding the sustained-release container,
The following problems were solved. ○ The amount of volatiles that come out of the container varies greatly in summer and winter. Especially in the summer, there are many volatiles, so the smell is too strong. ○ In the summer, the amount of volatile substances is extremely low.

[0005]

A method of making the container of the present invention will be briefly described first. Make the opening of the vessel with a material that has a low body expansion rate and is hard. A molded product made of a material having a high body expansion coefficient, flexibility and resilience is applied to the opening. This will be described in detail below.

The opening of the vessel is made of a hard material having a low body expansion coefficient. Make a container or container opening with a material that has a low coefficient of body expansion and is rigid. In the present invention, at least the opening of the container may be made of a material having a low body expansion coefficient. However, if different materials are used partially when making the container, the manufacturing process becomes difficult in various aspects such as material management. Therefore, it is easier to make the entire vessel from a material with a low body expansion rate. The body expansion coefficient is preferably selected from the range of about 1 to 50 × 10 ⁻⁶ · K ⁻¹ . Specifically, glass, epoxy resin,
Examples include melamine resin, glass fiber reinforced thermosetting resin, acrylic resin, polyethylene terephthalate, and certain alloys (eg, amber). The shape of the container may be any type such as a mounting type and a wall hanging type. An opening is provided for applying the molded product. The container is filled with a volatile substance such as an aromatic deodorant through the opening. If the volatile substance is a solid, make an opening that allows easy entry.

A molded product of a material having a high body expansion coefficient, a high flexibility, and a restoring property is applied to the opening. A material with a high body expansion rate is used to make a molded product to be applied to the opening of a vessel. The body expansion coefficient is preferably 500 × 10 ⁻⁶ · K ⁻¹ or more. Since it is applied to the opening of the container, it is preferable to use a material that is flexible, has a restoring property, and can form a molded product suitable for the shape of the opening.
Specifically, silicone rubber, butyl rubber, natural rubber,
The rubber is selected from isoprene rubber, styrene butadiene rubber, ethylene propylene diene rubber, chloroprene rubber, acrylonitrile butadiene rubber, and thermoplastic elastomers. You may blend and use these.

[0008] A molded product is made so that a space can be formed from the inside of the container to the outside of the container in the low temperature period, that is, in winter. This space will be referred to as a ventilation space. The ventilation space may be inside the molded product or between the molded product and the container. Moreover, both may be suitable. The size of the ventilation space depends on the degree of ventilation inside and outside the container. That is, when a substance with a strong odor is put in the container, it is desired to reduce the ventilation, so the ventilation space is made small. If you want to put a substance that is not too big, it is better to increase the ventilation, so make the ventilation space large. The shape of the container or molded article may be any shape as long as there is a ventilation space. Three concrete examples of the shapes of the container and the molded product will be described below.

Shape Example 1 (FIG. 1) A container having a ventilation space inside a molded product made of a material having a high body expansion coefficient. A material with a high body expansion rate is used to form a plug that fits into the opening of the vessel. The opening of the vessel may have any shape, but if it is made into a cylindrical shape with a gentle taper, it is easy to attach a stopper. Place a small vent in the stopper. This ventilation hole serves as a ventilation space. The size of the vent hole is such that when this plug is applied to the container in winter, that is, when the temperature is -5 to 5 ° C, the total cross-sectional area of the hole is 0.5 to 30 in the narrowest part.
mm ^2, preferably made to be 1.0 to 5.0 mm ^2.

[0010]

[Figure 1]

Shape Example 2 (FIG. 2) In this shape example, the ventilation space is between the opening of the container and the molded product. A sphere is molded from a material with a high body expansion rate. The opening of the container is shaped so as to wrap this sphere, and the upper and lower parts are opened. In order to prevent the molded product from completely closing the lower part of the opening of the container, a protrusion for supporting the molded product is provided in the lower part of the opening. The gap between the molded product and the opening of the container serves as a ventilation space. When the cross-sectional area of the narrowest part of the ventilation base is summed up, when the temperature is -5 to 5 ° C,
0.5 to 30 mm ² , preferably 1.0 to 5.0 mm _2.
So that

[0012]

[Fig. 2]

Shape Example 3 (FIG. 3) Shape Example 3 is an example using an O-ring. A material with a high body expansion rate is used to mold the O-ring. A material with a low body expansion rate is used to make the container body and the container lid. Put several feet on the lid so that the lid of the bowl separates from the body of the bowl. The inside of the lid of the vessel should have the same shape as the O-ring. The inner size is slightly larger than the O-ring. The gap created between the O-ring and the lid is the ventilation space. The total cross-sectional area of the ventilation space is -5 to 5 ° C.
At this time, the narrowest part is 0.5 to 30 mm ² , preferably 1.0 to 5.0 mm ² . (Shape example 1
The cross-sectional area of the ventilation space described in 3 is the area of the surface perpendicular to the direction in which the volatiles pass. )

[0014]

[Figure 3]

[0015]

The container of the present invention comprises a container made of a material having a low body expansion coefficient, and a molded product made of a material having a high body expansion coefficient applied to the opening of the container. At this time, a ventilation space is provided instead of completely sealing the container with a molded product. This ventilation space
Adjust the amount of volatiles that come out of the container. The three shape examples described above will be described.

The shape example 1 is one in which a ventilation space is provided in a plug made of a material having a high body expansion coefficient. In winter, a circular ventilation space with a cross section of approximately 1 mm is
5 open. In summer when the temperature is high, the plug has a high body expansion rate, so the plug becomes large. However, since the opening of the vessel is made of a material with a low body expansion rate, it does not become large.
For this reason, the plug cannot grow horizontally. The stopper grows vertically and the ventilation space is crushed. Therefore, the ventilation space in summer is very thin or crushed and disappears.

When this container is used as a sustained release container,
The total cross-sectional area of the ventilation space should be suitable for volatiles. For example, when the volatile substance contained in the container is a substance that easily volatilizes even when the temperature is low, such as perfume, the total cross-sectional area of the ventilation space is made small. When putting something that does not smell too strong, such as potpourri, increase the total cross-sectional area of the ventilation space. Since the temperature is high in summer, a lot of volatile substances are volatilized. However, since the aeration space of the container is narrow, the amount of volatile matter that comes out from the inside of the container is small. Since the temperature is low in winter, the amount of volatiles in the container is small. The stopper has a ventilating space of a set size, so the volatiles in the container will come out more and more. In this way, the amount of volatiles that come out of the container throughout the year hardly changes.

In the shape examples 2 and 3, the ventilation space is provided between the opening of the container and the molded product. Since the temperature is low in winter, there is a set ventilation space. In summer, molded products with a high body expansion rate become large. The opening of the vessel has a low body expansion rate, so it will not grow. For this reason, in summer, the moldings will block the opening of the vessel.

Also in these cases, the cross-sectional area of the ventilation space is set to a size suitable for the volatile matter, as in the case of the conforming example 1. In the summer when there are many volatile substances, the molded product expands and the ventilation space becomes narrower. Therefore, the amount of volatiles that come out of the container is small. In winter, the amount of volatiles is low. However, since there is a ventilation hole of a set size, volatile matter comes out of the container. As described above, the present invention is a container in which a substantially constant amount of volatile matter is discharged regardless of the temperature.

No matter what shape the container is made of, a large amount of volatile matter will not come out of the container when the temperature is high. Therefore, when the container of the present invention is used, the amount of volatile substances to be reduced in summer is smaller than that when the conventional container is used.

[0021]

【Example】

Glass, high material silicone rubber used in Example A) a low volume expansion rate material, examples to make container shape example 1 (FIG. 1) the internal volume of glass to make the vessels of 200 cm ^3. The container is provided with a cylindrical opening having a diameter of about 2 cm and a height of about 2 cm.
Silicone rubber was selected as the material for the container stopper. Silicone rubber is Toray Dow Corning Silicone SH
745U, and RC-4 of the same company were used as a crosslinking agent. Using this, 170 ℃, 10 minutes cross-linking conditions, diameter of about 2c
A cylindrical rubber stopper having a height of about 1.8 cm is molded. The rubber plug is provided with three vent holes having a cross-sectional diameter of 1 mm when the temperature is about 10 ° C. This silicone rubber plug is applied to the opening of the previous vessel. This is the container of the present invention.

An aromatic deodorant, for example, is placed in the container.
The container has a 1 mm direct vent in the winter.
All volatiles in the container come out of the container. However, since the temperature is low in winter, the amount of volatilization is low. Therefore, the amount of volatile matter that comes out of the container is small.

Since the opening of the container is made of glass, the diameter of the opening hardly changes between summer and winter. On the other hand, the body expansion coefficient of silicone rubber, which is the material of the rubber plug, is about 1000 ×
It is 10 ^<-6> * K ^{<-1 >} . In summer, when the temperature reaches about 30 ° C, the volume of the rubber stopper increases by about 2%. Therefore, in summer, the rubber plug extends vertically and the ventilation holes are crushed. Since the temperature is high in summer, the amount of fragrance deodorant in the container increases. Therefore, the internal pressure of the container becomes high.
The volatiles then emerge from the weakest part of the container, the vent. Therefore, the amount of volatile matter that comes out of the container is small. Thus, when the container of the present invention is used for an aromatic deodorant, the amount of volatiles coming out of the container does not change significantly throughout the year.

This container can also be used as a container for fragrances and insect repellents. Depending on the volatility of what is put in the container, set the number of ventilation holes in the direct line.

Example B) Example of making a container of shape example 3 by using melamine resin as a material having a low body expansion coefficient and butadiene rubber as a material having a high body expansion coefficient. A container body having an inner volume of 250 cm ³ and a container lid are made of melamine resin. .. For materials with high body expansion rate. Butadiene rubber was used. With butadiene rubber, the thickness of the rubber part is straight line 5
An O-ring having a diameter of 32 mm and a ring size of 32 mm is molded. The lid of the vessel has an inner height of 4 mm and an inner diameter of 3
Mold 2.5 mm. Place 6 feet of 2 mm in height and 3 mm in width on the lid.

In the winter, this container has a ventilation space having a width of about 0.5 mm between the lid of the container and the O-ring. In winter, the amount of volatile deodorants and the like is small, but all the volatile substances in the container come out of the container.

Butadiene rubber has a body expansion coefficient of about 72.
The one used was 0 × 10 ⁻⁶ · K ⁻¹ . When the temperature reaches about 30 ° C in summer, the volume increases by 1.5%. Therefore, the open ventilation base is closed in summer. During high temperatures, the amount of volatile substances such as aromatic deodorants is large. Only when the amount of volatiles in the container increases and the internal pressure exceeds a certain level, the elastic O-ring is compressed and the volatiles come out of the container. As described above, the present invention is a container in which the amount of volatile matter that does not change significantly throughout the year.

[0028]

[Effect] The container of the present invention is a container in which the ventilation space is closed or narrowed when the temperature is high and the ventilation space is opened when the temperature is low. Therefore, in the summer, it is difficult for the gas inside the container to come out and the gas outside the container to enter. However, in winter, the gas can freely flow in and out of the container.

The container of the present invention can be used as a sustained-release container in which the amount of volatile matter coming out of the container does not change significantly throughout the year. Until now, a lot of aromatic deodorants and insect repellents volatilized in the summer, and they all went out of the container. Then, the odor was too strong, which sometimes caused discomfort. With the container of the present invention, it is possible to reduce the amount of volatile substances that come out of the container in the summer. Therefore, the problem that the odor is too strong disappears. In addition, since the amount of volatilization is large in the summer, the aromatic deodorants and insect repellents disappeared immediately. By using the container of the present invention, a volatile substance such as an aromatic deodorant can be made to last long even in the summer.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a shape example 1.

FIG. 2 is a sectional view of a second shape example.

FIG. 3 is a cross-sectional view of a shape example 3.

[Explanation of symbols]

 1 Opening part 2 Molded part 3 Ventilation space

Claims (2)

[Claims] 1. A container in which an opening of a container is made of a material having a low body expansion coefficient and is hard, and a molded product made of a material having a high body expansion coefficient and being flexible and having a restoring property is applied to the opening. Has a hole or / and a gap communicating between the inside and the outside of the container in the molded product, or / and between the molded product and the opening, and the hole or / and the clearance corresponding to the temperature. A container characterized in that the size of the container changes. 2. The container according to claim 1, wherein a volatile substance is put in the container.