WO2012161350A1

WO2012161350A1 - Manufacturing method for labelling containers

Info

Publication number: WO2012161350A1
Application number: PCT/JP2012/064243
Authority: WO
Inventors: Takashi Yamada; Yoshinori Inagawa
Original assignee: Kao Corporation
Priority date: 2011-05-24
Filing date: 2012-05-24
Publication date: 2012-11-29
Also published as: JP2012240749A; JP5750306B2

Abstract

In a process of attaching a label to a sealed container, a pressure of an internal portion is increased by concaving a part of a wall surface of the sealed container (10). A label (40) is attached to a surface of the sealed container (10) in a state in which the pressure of the internal portion is increased.

Description

DESCRIPTION

Title of Invention :

MANUFACTURING METHOD FOR LABELLING CONTAINERS Technical Field

[0001]

The present invention relates to a manufacturing method for a labeled container.

Background Art

[0002]

In a plastic container which is formed by injection molding or blow molding, there is a structure which is used in a mode of a label container in which a decoration such as a tack label, a silk printed label, a thermal transfer label or the like is attached to a surface of the container, as described in Patent Literature 1 (PTLl).

[0003]

In a conventional manufacturing method for a labeled container, a container manufacturing line is provided with a container pressurizing apparatus which consists of pneumatic equipment, a pressure in an internal portion of the container is increased by inserting and attaching an air nozzle of the container pressurizing apparatus to an opening portion of the container, and a label is attached to a surface of the container in a state in which the pressure in the internal portion is increased. This method is used for the purpose of preventing a wall surface of the container from being pressed by a label attaching force thereby being deformed concavely, by increasing the pressure in the internal portion of the container. After finishing the attachment of the label, the air nozzle of the container pressurizing apparatus is detached from the opening portion of the container.

[0004]

In this case, it is necessary to enhance a pressing deformation resistance with respect to the label attaching force as the container is thinner.

Citation List

Patent Literature

[0005]

PTLi: Japanese Unexamined Patent Publication No.

2005-345793

Summary of Invention

Technical Problem

[0006]

In the conventional art, it is necessary to use a complicated large-scale container pressurizing apparatus which consists of pneumatic equipment.

[0007]

An object of the present invention is to simply increase a pressure of an internal portion of a container at a time of attaching a label to a surface of the container.

Solution to Problem

[0008]

In accordance with claim 1 of the present invention, there is provided a manufacturing method for a labeled container, comprising the steps of-^' increasing a pressure of an internal portion by concaving a part of a wall surface of a sealed container,^' and attaching a label to a surface of the container in a state in which the pressure of the internal portion is increased.

[0009]

In accordance with claim 2 of the present invention, further in the invention in accordance with claim 1, wherein the part of the concaved wall surface of the container is a bottom portion of the container.

[0010]

In accordance with claim 3 of the present invention, further in the invention in accordance with claim 2, wherein the bottom portion of the container is pressed into an inner side in an axial direction of a container main body with respect to a boundary portion to a body portion of the container so as to be concaved.

[0011]

In accordance with claim 4 of the present invention, further in the invention in accordance with any one of claims 1 to 3, wherein a cap is previously attached to an opening portion of the container so as to seal.

[0012]

In accordance with claim 5 of the present invention, further in the invention in accordance with claim 1, wherein a sealed container is used by forming the container by blow molding, and sealing an air blowing port after forming, and a filling port of a content is formed by cutting the vicinity of the air blowing port after attaching the label.

[0013]

In accordance with claim 6 of the present invention, further in the invention in accordance with any one of claims 1 to 5, wherein the container is a thin container, and a coefficient a is equal to or less than 0.45 in which a container weight is set to R, a container full volumetric capacity is set to V, a 2/3 power coefficient is set to a, and R = a · (2/3 power of V), where a is preferably 0.3 to 0.4.

Advantageous Effects of Invention

[0014]

In accordance with the manufacturing method for the labeled container of the present invention, it is possible to simply increase the pressure of the internal portion of the container at a time of attaching the label to the surface of the container.

Brief Description of Drawings

[0015]

[Fig. 1]

Fig. 1 is a schematic view showing an example of a manufacturing method for a labeled container.

[Fig. 2]

Fig. 2 is a schematic view showing a state before and after a concave portion is concaved.

[Fig. 3]

Fig. 3 is a schematic view showing another embodiment of the manufacturing method for the labeled container.

Description of Embodiments

[0016]

A labeled container 10 shown in Fig. 1 is used by attaching a cap 30 to a container main body 20, and a label 40 is attached to a surface of the container main body 20.

[0017]

The container main body 20 consists of a plastic molded body which is formed by blow molding. In a resin which constructs the container main body 20, it is necessary to facilitate an elastic pressing deformation of a bottom portion 24, which is discussed later. Specifically, it is possible to employ various resins such as PP, HDPE, PET, EVOH (a so-called hydrolysate of ethylene -vinyl acetate copolymer) and the like, and these various resins may be multilayered. The container main body 20 is a thin container in which a thickness is set approximately to 300 μπι to 2000 μπν. In this case, as discussed herein, thin container is a container in which a coefficient a (called as a 2/3 power coefficient) is equal to or less than 0.45, on the assumption that a weight of the container is set to R, a full volumetric capacity of the container is set to V, and R = a · (2/3 power of V), where a is preferably 0.3 to 0.4.

[0018]

The container main body 20 has a neck portion 21, a shoulder portion 22, a body portion 23, and a bottom portion 24, and is provided in an upper end portion of the neck portion 21 with an opening portion 20A which a content is injected to and/or is discharged from. The container main body 20 is threadably attached with the cap 30 at an outer peripheral thread portion of the neck portion 21, and is sealed.

[0019]

The label 40 consists of a film to which a print of a trade name or the like is applied, and is attached to a label attaching surface which is defined on a surface of the body portion 23 of the container main body 20.

[0020]

At a time of manufacturing the container 10, as shown in Fig. 1, a sealing is achieved by previously attaching the cap 30 (may be achieved by inserting and attaching a seal plug) to the opening portion 20A (Fig. 1(B)) of the container main body 20 after being formed (Fig. 1(A)). A concave portion 50 is formed by concaving a part of a wall surface of the sealed container main body 20, the bottom portion 24 in the present embodiment (Fig. 1(C)). A pressure of an internal portion is increased by reducing an internal volumetric capacity of the container main body 20, and the label 40 is attached to a label attaching surface of the surface of the body portion 23 of the container main body 20 in a state in which a pressure of the internal portion is increased (Fig. 1(D)).

[0021]

In the container 10, a % reduction in volume of the internal volumetric capacity by forming the concave portion 50 in the bottom portion 24 of the container main body 20 is 1 to 20%, and particularly is 10 to 20% in the thin container. A pressure (a pneumatic pressure) of the internal portion is therefore increased.

[0022]

One example of a shape of the bottom portion 24 forming the concave portion 50 is shown in Fig. 2. In Fig. 2, the bottom portion 24 of the container main body 20 has a stepped inclined portion 25 and a protruding portion 26. The stepped inclined portion 25 is connected to the body portion 23, having a reduced diameter with respect to the body portion 23 and being formed approximately as an inclined shape. The protruding portion 26 is connected to the inclined portion 25, and slightly protrudes to an outer side in a radial direction of the container main body 20 from the inclined portion 25.

[0023]

In the container main body 20, the inclined portion 25 and the protruding portion 26 which form the bottom portion 24, protrude to an outer side of the container main body 20 from the body portion 23, just after the blow molding. An occluded end surface of the protruding portion 26 forms a bottom plate portion 26A, and a pinch-off portion (not illustrated) is provided in the bottom plate 26A. Further, in the bottom portion 24 of the container main body 20, if the inclined portion 25 and the protruding portion 26 which protrude to the outer side of the container main body 20 are pressed into the inner side of the container main body 20, then the inclined portion 25 forms a pressing reverse portion 25B which is pressed towards or to the inner side in the axial direction in the container main body 20 with respect to a reverse boundary portion 25A which is a boundary portion of the body portion 23 around the bottom portion 24. The inclined portion 25 and the protruding portion 26 of the bottom portion 24 which run into the construction of the pressing reverse portion 25B mentioned above form the concave portion 50 which is concaved to the inner side of the container main body 20. In this case, the formation of the concave may be an irreversible process, or may be a reversible process. Further, a volume of the concaved amount of the concave portion is 15 to 25 ml, preferably 18 to 22 ml.

[0024]

In this case, since the inclined portion 25 (the pressing reverse portion 25B) of the bottom portion 24 is pressed into a deep inner side in the axial direction in an annular portion between the body portion 23 and the protruding portion 26 in the container main body 20 with respect to the reverse boundary portion 25A which is defined around the bottom portion 24, it is possible to thereafter stably maintain the concave portion 50 which is formed by the pressing. Further, an outer peripheral edge (a position of the reverse boundary portion 25A) of the concave portion 50 in the bottom portion 24 comes to a ground surface at a time of using the container 10 in an erecting manner.

[0025]

In the present embodiment, the container main body 20 employs a structure which is formed by the blow molding, however, may employ a structure which is formed by injection molding.

[0026]

Fig. 3 shows another example of the manufacturing of the container 10, and it employs an air blowing portion (which may be called as a flash or a burr) 21A which extends from the opening portion 20A accompanying to the neck portion 21 of the blow molded container main body 20, as a means for sealing the container main body 20 before forming the concave portion 50 in the bottom portion 24 of the container main body 20.

[0027]

In other words, the sealed container main body 20 (Fig. 3(A)) is obtained by forming the container main body 20 by the blow molding, and sealing the air blowing port 21B provided in the air blowing portion 21A after forming. Further, the concave portion 50 is formed by concaving a part of the wall surface of the sealed container main body 20, the bottom portion 24 in the present embodiment (Fig. 3(B)), and the pressure of the internal portion is increased by reducing the internal volumetric capacity of the container main body 20. The label 40 is attached to the label attaching surface on the surface of the body portion 23 of the container main body 20 in a state in which the pressure of the internal portion is increased (Fig. 3(C)). The filling port (the opening portion 20A) of the content is formed by cutting the air blowing portion 21A (in the vicinity of the air blowing port 2 IB) of the container main body 20 after attaching the label 40 (Fig. 3(D)).

[0028]

Therefore, in accordance with the container 10 of the present embodiment, the following operations and effects are obtained.

(a) The pressure of the internal portion is increased by concaving a part (the bottom portion 24) of the wall surface of the sealed container main body 20, and the label 40 is attached to the surface of the container main body 20 in a state in which the pressure of the internal portion is increased. Since the means for concaving a part of the wall surface of the container main body 20 is installed simply without installing the container pressurizing apparatus consisting of the pneumatic equipment on the container manufacturing line, it is possible to simply increase the pressure of the internal portion of the container main body 20, and it is possible to improve a label attaching property.

[0029]

Since the air nozzle of the container pressurizing apparatus is not inserted into and attached to the opening portion 20A of the container main body 20 for increasing the pressure of the internal portion of the container main body 20, but the opening portion 20A of the container main body 20 is sealed, any foreign material does not mix into the internal portion of the container main body 20.

[0030]

(b) Since the cap 30 is previously attached to the opening portion 20A of the container main body 20 so as to be sealed, it is possible to securely seal the container main body 20 in the item (a) mentioned above so as to increase the pressure of the internal portion.

[0031]

(c) The sealed container main body 20 is used by forming the container main body 20 by the blow molding, and sealing the air blowing port 2 IB after the molding, and the filling port (the opening portion 20A) of the content is formed by cutting the vicinity of the air blowing port 2 IB after attaching the label 40. It is possible to securely seal the container main body 20 in the item (a) mentioned above so as to increase the pressure in the internal portion, by sealing the air blowing port 21B of the container main body 20 which is blow molded.

[0032]

(d) The thin container 10 tends to be concavely deformed by the label attaching force, and particularly tends to be concavely deformed in the case that a radius of curvature of the label attaching surface is large (coming closer to a flat surface). On the other hand, the thin container 10 inflates greatly by a part of the wall surface of the sealed container main body 20 being concaved, and generates a great pressing deformation resistance with respect to the label attaching force. In accordance with this, it is possible to improve a label attaching property of the thin container 10.

[0033]

In this case, the concave portion 50 provided in the container main body 20 is not limited to the structure which is provided in the bottom portion 24, as long as it is a part of the wall surface of the container main body 20. [0034]

Further, the concave portion 50 may be structured such as to restore so as to protrude to the outer side of the container main body 20 after attaching the label 40 to the container main body 20.

[0035]

Further, the sealing means of the container main body 20 is structured such as to seal the container main body 20 by heat sealing the tubular portion which extends from the opening portion 20A accompanying to the neck portion 21, and may be cut from the container main body 20 after attaching the label 40.

Industrial Applicability

[0036]

In accordance with the present invention, the pressure of the internal portion is increased by concaving a part of the wall surface of the sealed container, and the label is attached to the surface of the container in the state in which the pressure of the internal portion is increased, and it is possible to simply increase the pressure of the internal portion of the container.

Reference Signs List

[0037]

10 labeled container

20 container main body

20A opening portion

21A air blowing portion

2 IB air blowing port

23 body portion

24 bottom portion cap

label concave portion

Claims

[Claim 1]

A manufacturing method for a labeled container, comprising the steps of

increasing a pressure of an internal portion by concaving a part of a wall surface of a sealed container,^' and

attaching a label to a surface of the container in a state in which the pressure of the internal portion is increased.

[Claim 2]

The manufacturing method for a labeled container according to claim 1, wherein the part of the concaved wall surface of the container is a bottom portion of the container.

[Claim 3]

The manufacturing method for a labeled container according to claim 2, wherein the bottom portion of the container is pressed into an inner side in an axial direction of a container main body with respect to a boundary portion to a body portion of the container so as to be concaved.

[Claim 4]

The manufacturing method for a labeled container according to any one of claims 1 to 3, wherein a cap is previously attached to an opening portion of the container so as to seal.

[Claim 5]

A manufacturing method for a labeled container according to claim 1, wherein^

a sealed container is used by forming the container by blow molding, and sealing an air blowing port after the forming, and a filling port of a content is formed by cutting the vicinity of the air blowing port after attaching the label.

[Claim 6]

A manufacturing method for a labeled container according to any one of claims 1 to 5, wherein the container is a thin container, and a coefficient a is equal to or less than 0.45 on the assumption that a weight of the container is set to R, a full volumetric capacity of the container is set to V, a 2/3 power coefficient is set to a, and R = a · (2/3 power of V).