JPH0234200Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tube container made of synthetic resin, and relates to a wall structure of a tube container made of synthetic resin having a satin-like outer surface.

[Conventional technology]

It is widely known that the external appearance of the container itself can be improved by applying a frosted-glass satin pattern to the outer surface of the container.

Various methods have been considered for applying a satin pattern to the outer surface of the container, depending on the material of the container.

For example, glass bottles can be made by etching or sandblasting, and this sandblasting is also used for synthetic resin bottles. In the case of synthetic resin bottles, sandblasting is also performed on the surface of the mold to give the molded product a satin-like surface.

[The problem that the idea aims to solve]

However, there is no extrusion molded tube made of synthetic resin that has a satin-like outer surface similar to that described above. This is because tubes made of synthetic resin are not suitable for sandblasting because they are soft, and even if the mold surface is sandblasted for extrusion molding, the outer surface of the extrusion tube will have a matte finish. Due to reasons such as the fact that it is impossible to do so.

In this way, there were no extrusion-molded tubes made of synthetic resin that had a satin-like outer surface. The demands placed on Chubu are high.

The present invention was devised in response to the above-mentioned conventional demands, and its purpose is to provide an extrusion-molded tube container made of synthetic resin and having a satin-like outer surface.

[Means and actions for solving the problem]

The means of the present invention for achieving this purpose is to have a tube body made of synthetic resin extruded into a cylindrical shape, and to add silica gel having a particle size of about 1 to 30 microns to a synthetic resin coating solution. A coating film is formed by applying a coating agent containing 7 parts to 11 parts based on the amount (100 parts) to the outer surface of the tube body and drying to form a film.

When the above-mentioned coating material is applied to the desired outer surface portion of the tube body, which has been extruded into a cylindrical shape in advance, by an appropriate means, the film thickness is uniform due to the surface tension of the coating liquid at the beginning of application. The film thickness of the applied coating material decreases due to evaporation of the solvent in the coating solution, but the film thickness at the locations where silica gel, which is a solid substance randomly located in the coating solution, is located is due to the thickness of the silica gel. The degree of reduction in film thickness varies depending on the size and overlap of the particles, and as a result, the outer surface of the coating film formed on the outer surface of the tube body after the evaporation of the solvent in the coating liquid is completed. The roughness is determined according to the size of the silica gel particles and the amount of silica gel added, resulting in a satin-like appearance with good appearance.

By adding more than a certain amount of silica gel to the coating solution, a coating film with a satin-like surface can be obtained, but in order to give the product tube container a luxurious appearance and a good texture. First, in order to reliably produce a satin finish, the size of the silica gel particles must be 1μ or more, and the amount of silica gel added must be 7 parts or more per 100 parts of the coating solution. be.

When the size of silica gel particles is 1μ or less,
Despite the increase in the amount of silica gel added, it was not possible to form a visible satin-like surface, resulting in an almost smooth surface, and even if the size of the silica gel particles was increased to 1μ or more, the amount of silica gel added was is 7
If it is less than 100%, it will not be possible to obtain a uniform satin finish.

On the other hand, if the size of the silica gel particles is 30μ or more, even if the amount of silica gel particles added is small, the resulting satin-like surface will be extremely rough and will not exhibit a good appearance. In addition, even if the size of the silica gel particles is 30μ or less, if the amount added is 11 parts or more, the satin-like surface to be molded will become extremely rough and the texture will be poor. It becomes rough and unpleasant.

[Example] Hereinafter, an example of the present invention will be described with reference to a bare surface.

In the illustrated embodiment, the head is integrally molded on the upper end of the synthetic resin tube body 1 extruded into a cylindrical shape,
After coating the outer surface of the tube body 1 with the coating film 2, filling the contents inside the tube body 1, the lower end of the tube body 1 is welded and sealed to form a completed tube container. The coating film 2 is formed to cover the entire outer surface of the tube body 1.

The results of an experimental example in which the coating film 2 was formed using a coating material in which silica gel having a particle size of 10 μm was added to the coating liquid are shown below.

When 6 parts of silica gel was added, the resulting satin finish became uneven and a uniform satin finish could not be obtained. The surface roughness of the coat film 2 in this case was approximately in the range of 5 to 10 microns.

When 7 parts of silica gel is added, the satin-like appearance appears uniformly over the entire surface of the coating film 2, and its density is rough but almost uniform, and the satin-like appearance and feel are extremely good. Ta.
In this case, the surface roughness of the coating film 2 is 10
It was in the range of ~20μ.

When 11 parts of silica gel is added, the satin-like appearance appears uniformly over the entire surface of the coating film 2, its density is dense and uniform, and the satin-like appearance and feel are extremely good. It was hot.
In this case, the surface roughness of the coating film 2 is 10
It was in the range of ~20μ.

When 12 parts of silica gel is added, the satin finish appears uniformly over the entire surface of the coating film 2, but the roughness of the satin finish is large, and the appearance is poor and the texture feels rough. It was hard to say that it was good. The surface roughness of the coat film 2 in this case was in the range of 10 to 20 μm.

[Effect of idea]

Since the present invention has the above-described configuration, it has the following effects.

Since it is possible to form a satin-like surface that is excellent in appearance and feel, it is possible to impart a high-class feel to the tube container as a product, thereby making it possible to provide a tube container with a good product image.

A satin-like surface can be obtained by simply applying a coating material to the desired outer surface portion of the extruded tube body and drying and molding the coated film, making it easy to mold and producing a uniform product. Obtainable.

[Brief explanation of the drawing]

The drawings are a partial cross section and an enlarged overall view showing an embodiment of the present invention. Explanation of symbols: 1; tube body; 2; coating film.

Claims (1)

[Scope of utility model registration request] A synthetic resin tube body extruded into a cylindrical shape and a synthetic resin coating liquid are coated with silica gel having a particle size of about 1 to 30μ in the amount (100 parts) of the coating liquid.
A synthetic resin tube container comprising a coating film formed by applying a coating agent containing 7 to 11 parts to the tube body on the outer surface of the tube body and drying to form a film.