JP3687009B2 - Corrosion resistant aerosol container - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a corrosion-resistant aerosol container, and more particularly to a corrosion-resistant aerosol container in which an inner cylinder container can be easily inserted into and attached to an outer cylinder container.
[0002]
[Prior art]
Conventionally, materials that are highly corrosive to metals, such as permanent wave liquids, hair dyes, and the like, are stored in aerosol containers. And, as a corrosion-resistant aerosol container that can store such strong alkali, strong acid, sulfide, halide, etc., which has strong metal corrosiveness, the inner surface of the polyolefin container, polyamide system, There is a corrosion-resistant aerosol container in which a synthetic resin such as polyvinyl chloride is coated by a method such as spray coating or powder coating. However, in the aerosol container sprayed on the inner surface, the thickness of the inner surface coating film is not constant, and there is a problem that pinholes are generated in the coating film or cracks occur. There was a limit to the PH range (alkaline and acidic range) of the product.
[0003]
Therefore, when it is made in advance by molding separately from the outer cylinder container and is inserted and attached from the mouth of the outer cylinder container so as to completely match the inner surface shape and dimensions of the outer cylinder container (before filling the contents) In addition, an inner cylinder container that completely adheres to the inner surface of the outer cylinder container has been proposed, and a corrosion-resistant aerosol container in which the inner cylinder container is installed has been provided. Since the thickness of this inner cylinder container is 0.1 mm to 1.0 mm, which is thicker than spray coating (0.02 mm to 0.07 mm), there is no risk of pinholes occurring, and the energization value Is nearly zero. Such a corrosion-resistant aerosol container is shown in FIG. In the figure, reference numeral 50 denotes a metal outer cylinder container. On the inner surface of the outer cylinder container 50, an inner cylinder container 51 made of synthetic resin that matches the inner surface shape and dimensions of the outer cylinder container 50 is provided. It is attached in close contact with the inner surface. The corrosion resistant aerosol container has the same inclination angle of the shoulder of the inner cylinder container 51 and the inclination angle of the shoulder part of the outer cylinder container 50, and the bottom 52 of the outer cylinder container 50 is raised to a dome shape, Along with this, the bottom 53 of the inner cylinder container 51 is also deformed and mounted in a dome shape.
[0004]
[Problems to be solved by the invention]
However, such an invention has the following drawbacks.
(1) When inserting / attaching the inner cylinder container 51, the inner cylinder container 51 in a squeezed state is inserted / attached into the outer cylinder container 50 from the narrow mouth portion 54 of the squeezed outer cylinder container 50. Inserting and mounting work when doing so is cumbersome and the work speed cannot be increased.
(2) The bottom part 52 of the outer cylinder container 50 is formed in a dome shape. In the inner cylinder container 51 made by blow molding, a pinch-off part 55 (gold) formed on the bottom part 53 of the inner cylinder container 51 is used. The protrusions formed at the mold joints) and the inside of the dome apex of the bottom 53 come into contact with each other, stress is concentrated on the pinch-off portion 55 of the inner cylinder container 51, and the bottom 53 of the inner cylinder container 51 is cracked. There is a risk of doing.
[0005]
The present invention has been made paying attention to such a conventional problem, and is easy to insert and mount the inner cylinder container into the outer cylinder container, and is resistant to cracking at the bottom of the inner cylinder container. An object is to provide an aerosol container.
[0006]
[Means for Solving the Problems]
In order to solve this problem, the present invention provides a metal outer cylinder container and an inner wall made of a synthetic resin that is inserted from the mouth of the outer cylinder container, is attached to the inner surface of the outer cylinder container, and has a pinch-off portion at the bottom . In a corrosion-resistant aerosol container that is composed of a cylindrical container, has a high degree of adhesion between the outer cylindrical container and the inner cylindrical container, and no injection gas exists between the outer cylindrical container and the inner cylindrical container, the inclination of the shoulder of the outer cylindrical container between the inclination angle of the shoulder of the corner (alpha) and the inner cylinder chamber (β), α> relationship is established in the beta, axial bead height of the outer cylinder chamber (C) and the inner cylinder chamber cylinder The relationship C <D is established between the neck length (D) and the dimension (A) from the shoulder lower end of the outer cylinder container to the bottom inner surface of the outer cylinder container, and the shoulder lower end of the inner cylinder container Between the bottom and outer dimensions of the inner cylindrical container (B), a relationship of A> B is established, the bottom of the outer cylindrical container is formed horizontally, and there is a gap between the shoulder and the bottom. Corrosion resistant aerosol container, characterized in that it is made.
[0007]
[Action]
The operation of the present invention having the above configuration will be described. In the first and second inventions according to the present invention, when the inner cylinder container is inserted and attached to the outer cylinder container, a certain gap is formed between the outer cylinder container and the inner cylinder container. Therefore, it is easy to insert and mount. In the third invention, no intensive stress is applied to the pinch-off portion at the bottom of the inner cylinder container.
[0008]
【Example】
Next, a description will be given based on the present invention. FIG. 1 shows an embodiment of a corrosion-resistant aerosol container according to the present invention. Reference numeral 1 denotes an outer cylinder made of a metal such as aluminum, and an inner cylinder made of a synthetic resin is provided in the outer cylinder 1. The container 2 is inserted and mounted. The layer structure of the inner cylinder container 2 may be a single layer in which polyethylene or polyethylene is mainly mixed with other resins, or a multilayer structure such as polyethylene / gas barrier resin / polyethylene. Examples of the gas barrier resin include saponified ethylene-vinyl acetate copolymer, nylon, acrylonitrile-based thermoplastic resin, and the like. The outer container 1 and the inner container 2 are preferably those that can be in close contact with each other at the time of insertion / mounting. However, considering the insertion / mounting into the outer tube container 1, the higher the degree of contact, the more difficult the insertion / mounting is. The inventors have found that the inner cylinder container 2 can be easily inserted and mounted by forming a gap between the outer cylinder container 1 at the shoulder 2a and the bottom 2b of the inner cylinder container 2 in particular. .
[0009]
As shown in FIG. 2, the first invention according to the present invention is such that α> between the inclination angle α of the shoulder portion 1a of the outer cylindrical container 1 and the inclination angle β of the shoulder portion 2a of the inner cylindrical container 2. The outer cylinder container 1 is established such that the relationship of β is established and the relationship C <D is established between the axial bead height C of the outer cylinder container 1 and the neck length D of the inner cylinder container 2. If the dimensions of the inner cylinder container 2 are determined, a sufficient gap is generated between the outer cylinder container 1 and the inner cylinder container 2, and in this case, the insertion and mounting operations of the shoulder portions 2a and 2c are facilitated. During work, damage to the shoulder 2a and the neck 2c can be prevented. If at least α> β or C <D, the above effect can be satisfied.
[0010]
In the second invention according to the present invention, the dimension A from the lower end of the shoulder 1a of the outer cylinder 1 to the inner surface of the bottom 1b of the outer cylinder 1 and the lower end of the shoulder 2a of the inner cylinder 2 to the inner cylinder 2 If the dimensions and shapes of the outer cylinder container 1 and the inner cylinder container 2 are determined so that a relationship of A> B is established between the dimension B to the outer surface of the bottom 2b of the outer cylinder 2b, the outer cylinder container 1 and the inner cylinder container 2 are determined. A gap is formed in the axial direction. That is, since a gap is formed between the bottom portion 1b of the outer cylinder container 1 and the bottom portion 2b of the inner cylinder container 2, insertion and mounting operations of the inner cylinder container 2 are facilitated.
[0011]
Furthermore, the third aspect of the present invention is characterized in that the bottom portion 1b of the outer cylinder container 1 is formed horizontally. Thereby, the pinch-off part 2e formed in the bottom part 2b of the inner cylinder container 2 does not contact the bottom part 1b of the outer cylinder container 1. And since the thickness of the inner cylinder container 2 which concerns on this invention demonstrated above is thicker than the thickness by spray coating as mentioned above, since a pinhole does not generate | occur | produce and thickness is substantially constant, it is filled. The PH area of the contents can be expanded.
[0012]
Next, a method for assembling the corrosion resistant aerosol container according to the present invention will be described. After the inner cylinder container 2 is squeezed in the radial direction, the inner cylinder container 2 is inserted and mounted into the outer cylinder container 1 from the mouth portion 1d of the outer cylinder container 1. Then, the collar part 2d of the inner cylinder container 2 is mounted on the bead part 1c of the outer cylinder container 1, and the mounting cup 3 is clinched from the top. Finally, the contents are filled into the inner cylinder container 2 through the valve 4. Since no gas or the like exists between the outer cylinder container 1 and the inner cylinder container 2, the inner cylinder container 2 expands somewhat by filling the contents, and the gap between the outer cylinder container 1 and the inner cylinder container 2 is small. Become. In addition, inner cylinder coating may be given to the inner surface of the outer cylinder container 1 which concerns on this invention.
[0013]
【The invention's effect】
As described above, according to the corrosion-resistant aerosol container according to the present invention, it is easy to insert the inner cylinder container into the outer cylinder container, and the operation speed can be increased. Moreover, after filling the contents, there is an effect that it is possible to prevent the bottom of the inner cylinder container from being cracked.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a corrosion-resistant aerosol container according to the present invention.
FIG. 2 is a cross-sectional view showing the shape and dimensions of an outer cylinder container and an inner cylinder container in a corrosion-resistant aerosol container according to the present invention.
FIG. 3 is a front sectional view of a conventional corrosion-resistant aerosol container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer cylinder container 1a Shoulder part 1b Bottom part 1d Mouth part 2 Inner cylinder container 2a Shoulder part 2b Bottom part

Claims (3)

It is composed of a metal outer cylinder container and a synthetic resin inner cylinder container that is inserted from the mouth of the outer cylinder container, attached to the inner surface of the outer cylinder container, and provided with a pinch-off portion at the bottom , In a corrosion-resistant aerosol container that has a high degree of close contact with the inner cylinder container and no injection gas exists between the outer cylinder container and the inner cylinder container, the inclination angle (α) of the shoulder of the outer cylinder container and the shoulder of the inner cylinder container Between the inclination angle (β) of the inner cylinder container and the relationship between α> β and the axial bead height (C) of the outer cylinder container and the cylindrical neck length (D) of the inner cylinder container. , C <D, and the dimension (A) from the shoulder lower end of the outer cylinder container to the bottom inner surface of the outer cylinder container and the dimension (B) from the shoulder lower end of the inner cylinder container to the bottom outer surface of the inner cylinder container ) and during, a> relationship B is satisfied, the corrosion resistance air the bottom of the outer cylinder chamber horizontally formed, characterized in that the gap is formed in the shoulder portion and the bottom portion Lumpur container. 2. The corrosion-resistant aerosol container according to claim 1, wherein the inner tube container made of synthetic resin is composed of polyethylene or a single layer in which polyethylene is mainly mixed with another resin. The corrosion-resistant aerosol container according to claim 1, wherein the inner cylinder container made of synthetic resin is composed of a multilayer of polyethylene / gas barrier resin / polyethylene.

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