JP5452191B2 - container - Google Patents

Description

  The present invention relates to a container.

  Conventionally, as shown in Patent Document 1 below, for example, it has been proposed to improve the gas barrier property of a container by forming a coating on the wall surface of the container body.

Japanese Patent Laying-Open No. 2005-280718

  However, there has been room for improvement in terms of easily and reliably removing liquids such as cleaning liquid and content liquid adhering to the container.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a container that can easily and reliably exclude liquid adhering to the container.

To solve the above problems, in order to achieve this object, the container of the present invention, together with the wall surface of the container body is covered by the base layer, the base layer is partially covered with a covering layer, wherein The container body is formed of polyethylene terephthalate, the base layer is formed of amorphous carbon, the coating layer is formed of an organic silicon compound, and the coating layer is formed by using a mask material having a large number of through holes as the base layer. In a state of being opposed to each other, it is formed by a plasma CVD method and is an aggregate of a large number of film bodies arranged on the base layer at a distance from each other, and the base layer is formed of the coating layer and the container body. The water contact angle is smaller than the wall surface, and the coating layer has a water contact angle larger than the wall surface of the container body .

  According to the present invention, the liquid adhering to the container can be easily and reliably removed.

Moreover, since the said coating layer is formed with the organic type silicon compound, the liquid adhering to a container can be excluded more easily and reliably.

Further, since the coating layer is an aggregate of a large number of film bodies arranged on the base layer with a space between each other, it is easy to partially expose the base layer and cover it with the coating layer. It can be realized reliably.

  According to the present invention, the liquid adhering to the container can be easily and reliably removed.

It is principal part sectional drawing of the container shown as one Embodiment which concerns on this invention.

Embodiments of the present invention will be described below with reference to the drawings.
A container 10 according to the present embodiment is used by being filled with a food such as a beverage or a seasoning, or a medicine such as a detergent or a medicine, and is formed in a bottomed cylindrical shape as shown in FIG. The main body 11 and the film 12 arrange | positioned on the wall surface of the container main body 11 are provided.
The container body 11 is formed of a synthetic resin material such as polyethylene terephthalate, a glass material, or a metal material, for example.

  The coating 12 includes a base layer 13 that covers the wall surface of the container body 11 and a coating layer 14 that partially covers the base layer 13, and the liquid that contacts the container 10 is not only the coating layer 14 but also the base layer. 13 also comes into contact. The base layer 13 is disposed directly on the wall surface of the container body 11. The water contact angles of the base layer 13 and the coating layer 14 are different from each other. The base layer 13 and the coating layer 14 are made of, for example, amorphous carbon (diamond-like carbon), silicon oxide (for example, silicon dioxide), an organic silicon compound, or a fluorine resin. In addition, when the base layer 13 is formed of amorphous carbon or silicon oxide, the gas barrier property of the container 10 can be improved.

In the present embodiment, the base layer 13 is formed over the entire area of at least one of the outer peripheral surface and the inner peripheral surface of the container body 11, and a large number of coating layers 14 are arranged on the base layer 13 at intervals. It is an aggregate of the film body 14a. The base layer 13 is exposed from the gap between the film bodies 14a.
The wall surface of the container body 11 that forms the coating 12 is preferably the inner surface of the container body 11 from the viewpoint of reducing the remaining liquid amount. Further, for example, each film body 14a is formed in a circular shape in plan view having a diameter of about 0.75 mm, and the distance between the film bodies 14a adjacent to each other is about 0.5 mm.

When the material is amorphous carbon, silicon oxide, or an organic silicon compound, the base layer 13 and the coating layer 14 are each formed by a plasma CVD method.
In addition, when the material of the base layer 13 and the coating layer 14 is a fluorine resin, it is formed by performing fluorine coating by coating (coating) or the like. In this case, from the viewpoint of improving adhesiveness, surface treatment (surface modification) may be performed on the wall surface of the container body 11 in advance before the fluorine coating.

  Here, the coating layer 14 is formed by plasma CVD or fluorine coating by coating (coating) or the like in a state where a mask material having a large number of through holes is opposed to the base layer 13. That is, the material for forming the coating layer 14 passes through a large number of through holes formed in the mask material and adheres to the base layer 13 to form a large number of film bodies 14a, whereby the coating layer 14 is formed. Is done. Then, by removing the mask material, the base layer 13 is exposed from between the film bodies 14a constituting the coating layer 14. Examples of the mask material include a sheet-like body or a film-like body.

  Next, the verification test about the drainage effect improvement by having formed the film 12 on the wall surface of the container main body 11 was implemented.

For all of the examples, comparative examples and reference examples shown in Table 1, a container body formed of polyethylene terephthalate was adopted, and a coating film was formed on the inner peripheral surface (wall surface) of the container body.
In Examples 1 and 3, the base layer 13 has a smaller water contact angle than the container body 11 and the coating layer 14, but in Example 2, the base layer 13 includes the container body 11 and the coating layer. The contact angle of water is larger than 14. Furthermore, in Examples 1 to 3, the coating layer 14 has a larger water contact angle than the container body 11.

This test was evaluated by draining about 350 ml of the content liquid poured into the container, and then measuring the remaining amount of the content liquid when the container was held in an inverted position for 1 minute. Moreover, this test was implemented about two types of content liquid, tap water and cooking oil.
The results are shown in Table 1.
Table 2 shows film formation conditions and surface treatment conditions corresponding to the examples, comparative examples, and reference examples shown in Table 1.
Note that the "O ₂ plasma treatment" in Table 1, on the wall or the base layer of the container body, instead of forming a film, the oxygen gas was supplied to the surface treatment (deposition space by O ₂ plasma, the plasma Is given). In Table 2, “HMDSO” is hexamethyldisiloxane, and the gas flow rate “sccm” is the amount of gas (cc) flowing per minute at 0 ° C. and 1 atm. Further, when the base layer is formed of a fluorine-based resin as in Example 2, Comparative Example 3, Reference Example 6 and Reference Example 7, first, surface treatment with O ₂ plasma is performed on the inner peripheral surface of the container body. Thereafter, a fluorine treatment agent was introduced into the container body to perform fluorine coating.

As a result, when the organic silicon compound is used for the coating layer 14, when the example having the base layer 13 made of the same material is compared with the comparative example, the example is compared with the comparative example not having the coating layer 14. Thus, it was possible to reduce the remaining amount of the content liquid for both tap water and cooking oil, and it was confirmed that the drainage effect was improved for the examples.
Moreover, it is confirmed from the comparison between Example 1 and Example 3 that the drainage effect is further improved when the mask layer is used when the coating layer 14 is formed as compared with the case where the mask material is not used. It was.
In Table 1, Reference Examples 2, 4, 5, 6, 8, and 9 are obtained by performing surface treatment with O ₂ plasma. Among these, the comparison between Reference Example 8 and Comparative Example 1 confirms that the water contact angle tends to be reduced by performing surface treatment with O ₂ plasma.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, when the container body 11 is formed by blow molding a preform formed of a synthetic resin material, the coating 12 may be formed after blow molding or the preform before blow molding You may form in.
Moreover, in the said embodiment, although the planar view circular-shaped film body 14a was shown, it may replace with this, for example, may be changed suitably, such as planar view polygonal shape or planar view linear shape.
Furthermore, the container main body 11 is not limited to a single layer body, but may be a laminated body. In the latter case, the water on the wall surface of the layer in which the base layer 13 is directly arranged among the plurality of layers constituting the container main body 11. The contact angle may be larger than that of the base layer 13 and smaller than that of the coating layer 14.
Further, the base layer 13 and the covering layer 14 are not limited to a single layer, and may be a laminate. In this configuration, by forming a mixed layer of the base layer 13 and the covering layer 14 between the base layer 13 and the covering layer 14, the adhesion between the layers 13 and 14 may be improved.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

  The liquid adhering to the container can be easily and reliably removed.

DESCRIPTION OF SYMBOLS 10 Container 11 Container main body 13 Base layer 14 Covering layer 14a Film body

Claims (1)

While the wall surface of the container body is covered with the base layer, the base layer is partially covered with the covering layer,
The container body is formed of polyethylene terephthalate, the base layer is formed of amorphous carbon, the coating layer is formed of an organic silicon compound,
The coating layer is formed by a plasma CVD method with a mask material having a large number of through-holes facing the base layer, and a large number of film bodies are arranged on the base layer at intervals. Is a collection of
The container, wherein the base layer has a smaller water contact angle than the coating layer and the wall surface of the container body, and the coating layer has a water contact angle larger than the wall surface of the container body .

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