JP4370077B2 - Container with cylindrical label - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is, for example, the container body such as a PET bottle, relates a cylindrical label having a heat shrinkability in the cylindrical labeled container formed by fitting the.
[0002]
[Prior art]
Conventionally, as a container for soft drinks such as tea and juice, the product name, design, description of contents, etc. on plastic container bodies such as polyethylene terephthalate (PET) bottles that are filled with soft drinks as contents A container with a cylindrical label equipped with a cylindrical label made of a heat-shrinkable film printed with a display is known.
[0003]
The cross-sectional shape of the container body used in this type of container with a cylindrical label is roughly divided into two types, a circular shape and a square shape. More specifically, when a soft drink containing carbonic acid is filled in a container main body, an internal pressure acts on the container main body due to carbonic acid. Therefore, a container having a circular cross section is used as a container body filled with such a carbonated beverage. In addition, the container body filled with soft drinks that do not contain carbonic acid, such as fruit juice drinks, sports drinks, tea and coffee, has a rectangular cross section (such as a square or hexagonal shape) in terms of container strength, deformation prevention, and design. Most of them have a partially circular cross section). The container body having the square cross section has a protruding portion that protrudes outward as a vertex on the outer peripheral surface, and at least the protruding portion comes into contact with the cylindrical label so that the cylindrical label is placed on the outer peripheral surface of the container main body. It is fitted.
[0004]
Regardless of the shape, this cylindrically labeled container has excellent characteristics such as lightness, impact resistance, and storage stability, and is widely used for its ease of use. There are also vending machines sold.
[0005]
[Problems to be solved by the invention]
By the way, in recent years, with the progress of resource saving, in a container with a cylindrical label, it is required to reduce the thickness of the container body in order to reduce the material used for the container body.
[0006]
However, if the thickness of the container main body is reduced, the rigidity of the container main body is lowered, and as a result, the container main body is deformed and easily crushed. In particular, the container body having a square cross section is easily deformed. That is, in a circular cross-section container body filled with a carbonated beverage, as described above, internal pressure is generated in the container body due to carbonic acid, and therefore it is difficult to be crushed even if the thickness of the container body is reduced. On the other hand, when the container body has a square cross section, since the soft drink to be filled does not contain carbonic acid, there is a problem that when the thickness of the container body is reduced, the container body is easily deformed and crushed by an external force. is there.
[0007]
For example, when filling a container with a cylindrical label in a vending machine or the like, if the container with a cylindrical label positioned below is deformed and crushed by the weight of the other container with a cylindrical label stacked thereon, Troubles such as the container with the cylindrical label being clogged in the vending machine may occur.
[0008]
The present invention has been made in order to solve such a problem, it is an object of the invention to provide a preventable tubular labeled container deformation of the container body even if the thickness of the container body .
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a container with a label according to the present invention is a container with a cylindrical label in which a cylindrical label made of a heat-shrinkable film is fitted on the outer peripheral surface of a plastic bottle-shaped container body. The container body is provided between the plurality of projecting portions provided at intervals in the circumferential direction and bent in a convex manner toward the outside so as to come into contact with the cylindrical label. An inner peripheral surface of the cylindrical label so as to prevent a change in the distance between adjacent projecting portions provided on the outer peripheral surface of the panel wall portion that is provided and is formed in a planar shape or bent in a concave shape toward the inside. At least the region in contact with the protrusion is provided with a heat-sensitive adhesive or moisture-sensitive adhesive as an anti-slip agent, and the cylindrical label is made of polyester and has a stretching ratio of 3.5 in the circumferential direction. and thermal shrinkage of 80 ° C. temperature with 6-fold Characterized in that it shrinks to be a straight line between the protruding portions be not less than 55% in 10 seconds. In the present invention, the anti-slip agent is used to fix the contact portion between the cylindrical label and the protruding portion so as not to be displaced when an external force is applied to the container body.
[0010]
Usually, when a container main body receives external force and deform | transforms, the position of a protrusion part moves. Specifically, due to the deformation of the container body, adjacent protrusions are relatively close to each other, and adjacent protrusions are relatively separated from each other. Conventionally, since the cylindrical label and the protrusion are only in contact with each other, the cylindrical label and the container main body are separately deformed. However, according to the container with a cylindrical label according to claim 1, since each protrusion and the cylindrical label are fixed by the anti-slip agent, the adjacent protrusions are relatively relative to each other as the container body is deformed. It is prevented by a label that it leaves. As a result, since the adjacent protrusions are also prevented from relatively approaching, deformation of the container body as a whole can be prevented. If the container body is in contact with the cylindrical label even at a position other than the protruding portion, the container main body and the cylindrical label are fixed by the anti-slip agent at the contacting position in addition to the protruding portion. It may be.
[0011]
As the anti-slip agent, it is preferable to use a heat-sensitive adhesive or a moisture-sensitive adhesive that generates tackiness by adding moisture.
[0012]
When the cylindrical label is fitted on the container main body, for example, after the cylindrical label is put on the container main body, the cylindrical label is contracted by applying steam to the cylindrical label to fit the container main body. At this time, the moisture of the steam causes stickiness to the moisture sensitive adhesive provided on the inner peripheral surface of the cylindrical label, and the cylindrical label and the protruding portion are fixed. In addition, by applying heat to the cylindrical label, the cylindrical label contracts, and the heat-sensitive adhesive becomes sticky, and the cylindrical label and the protruding portion are fixed.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a side view of a container with a cylindrical label according to the present embodiment, FIG. 2 (a) is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2 (b) is a partially enlarged view of FIG. The figure is shown. As shown in FIGS. 1 and 2, the container with a cylindrical label according to the present embodiment includes a bottle-shaped container main body 1 and a cylindrical label 2 fitted on the outer peripheral surface of the container main body 1. .
[0016]
The container body 1 has a cylindrical body 10, and the cylindrical label 2 is fitted on the outer peripheral surface of the body 10. An opening for taking in and out a soft drink or the like as a content is provided at the upper end of the body portion 10. The opening is configured such that a lid (not shown) is detachable, and after the soft drink is filled in the container body, the lid is screwed to close the opening so that the container body 1 is sealed. be able to. The container body 1 is made of plastic, and is preferably formed by blow molding (PET bottle) of a polyester resin such as polyethylene terephthalate.
[0017]
The body 10 has a substantially polygonal cross section as shown in FIG. More specifically, the body 10 includes a plurality of protrusions 4 provided at predetermined intervals in the circumferential direction, and panel wall parts 5 provided between the protrusions 4. Thus, it has a polygonal shape with the protrusions 4... As a vertex (in this embodiment, a hexagonal shape having six protrusions 4...).
[0018]
The projecting portions 4,... Project outwardly in the radial direction and are provided at equal intervals in the circumferential direction. The cylindrical label 2 is fitted on the body 10 by coming into contact with the protrusions 4. And the said panel wall part 5, ... is formed in the circular arc shape curved concavely toward radial inner side. That is, as will be described later, when the tubular label 2 is thermally contracted and fitted onto the body portion 10, the tubular label 2 and the panel wall portions 5,. Preferably, in the circumferential direction, the lengths of the projecting portions 4... Are shorter than the lengths of the panel wall portions 5.
[0019]
As shown in FIG. 3, the cylindrical label 2 is formed in a cylindrical shape by bonding both end portions of a rectangular film 20 having heat shrinkability. The film 20 is made of a polyester resin, a polystyrene resin, a polypropylene resin, a polyvinyl chloride resin, or the like having a thickness of 10 to 80 μm (preferably 20 to 50 μm), and is mainly formed by stretching in a uniaxial direction. When formed in a cylindrical shape with the main stretching direction as the circumferential direction, it has heat shrinkability in the circumferential direction. Therefore, since the cylindrical label 2 contracts in the circumferential direction by heating the cylindrical label 2 in a state where the cylindrical label 2 is positioned on the outer periphery of the container body 1, the cylindrical label 2 can be fitted on the outer peripheral surface of the trunk portion 10. it can.
[0020]
An antislip agent 3 is applied to the entire inner peripheral surface of the cylindrical label 2. Therefore, when the cylindrical label 2 is fitted on the trunk portion 10, the cylindrical label 2 and the trunk portion 10 are fixed at the protruding portions 4,. Anti-slip agent 3 has a friction coefficient of 0.7 or more with a polyester film (polyester film having a coefficient of static friction between polyester film surfaces of 0.45 (for example, Toyobo Ester Film E5000: Toyobo Co., Ltd.)) The coefficient of static friction measured with respect to the surface of the film can be used (for example, a printing ink or a coating agent, preferably an adhesive, having the coefficient of friction). Agents can be used. Specifically, in the present embodiment, as the anti-slip agent 3, a moisture-sensitive (re-humidifying) adhesive 3 such as casein, dextrin, polyvinyl alcohol, gum arabic, polyacrylamide or the like, a modified product or a mixture thereof is employed. Yes. In particular, when an adhesive is used, it is sufficient that the adhesive is only pseudo-bonded with a weak adhesive force.
[0021]
In order to fit the cylindrical label 2 on the container main body 1, first, when the cylindrical label 2 is disposed so as to cover the trunk portion 10 of the container main body 1, The label 2 contracts in the circumferential direction, and the projecting portions 4 and the cylindrical label 2 come into contact with each other. Then, the steam is further applied to shrink the cylindrical label 2 until it becomes linear between the projecting portions 4. At this time, since the panel wall portions 5,... Are provided in a concave shape, the cylindrical label 2 and the panel wall portions 5,. Further, at the same time as the cylindrical label 2 contracts, the moisture-sensitive adhesive 3 applied to the inner peripheral surface of the cylindrical label 2 by the moisture of the steam causes stickiness, so that the cylindrical label 2 and the protrusions 4. And adhere. Thereafter, when the moisture-sensitive adhesive 3 is dried, the protrusions 4 and the tubular label 2 are completely fixed.
[0022]
The container with a cylindrical label according to the present embodiment is configured as described above, and applies the moisture-sensitive adhesive 3 to the inner peripheral surface of the cylindrical label 2 to fix the cylindrical label 2 and the protrusions 4. Thus, deformation of the container body 1 can be prevented. That is, in the conventional container with a cylindrical label, as shown in FIG. 5, when an external force is applied, the panel wall portions 5,. Here, in FIG. 5, the container body 1 has the same shape as that of the container with a cylindrical label according to the above-described embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted. When the panel wall portions 5,... Are deformed, the container body 1 and the cylindrical label 2 are only in contact with each other, so that the projecting portions 4,. The protrusions 4a and 4b are relatively separated from each other, and the protrusions 4b and 4c that are adjacent to each other are relatively close to each other. On the other hand, in the container with a cylindrical label according to the present embodiment, since the protruding portions 4,... And the cylindrical label 2 are fixed, the adjacent protruding portions 4a and 4b are relatively separated from each other at a certain portion. Can be prevented by the cylindrical label 2. If it does so, it will also prevent that the protrusion parts 4b and 4c which adjoin by another part approach relatively, As a result, a deformation | transformation of the container main body 1 can be prevented. In particular, since the cylindrical label 2 of the present invention uses a film mainly stretched in the circumferential direction as described above, it is difficult to stretch in the circumferential direction and is excellent in deformation prevention. In particular, the cylindrical label 2 made of a polyester heat-shrinkable film having a draw ratio in the main drawing direction of about 3.5 to 6 times is preferable because it has a strong shrinkage force in the circumferential direction and is difficult to stretch. The thermal contraction rate of the cylindrical label 2 is preferably 55% or more at 80 ° C. (hot water 10 seconds) so that the container main body 1 is thin but hardly damaged when attached (shrinkage).
[0023]
In a conventional container with a cylindrical label, it is necessary to increase the thickness of the container body to prevent the deformation of the container body. On the other hand, in the container with a cylindrical label according to the present embodiment, the thickness of the container body 1 can be made thinner than that of a conventional container with a cylindrical label.
[0024]
Moreover, since the moisture-sensitive adhesive 3 applied to the inner peripheral surface of the cylindrical label 2 reacts with moisture and becomes sticky, the stickiness is produced until moisture such as steam is added to the tubular label 2. Therefore, handling of the cylindrical label 2 becomes easy.
[0025]
Further, the moisture-sensitive adhesive 3 is dried and solidifies gradually after the cylindrical label 2 contracts due to the heat of steam and contacts the protrusions 4... Even if it is misaligned, it can be corrected.
[0026]
In addition, the bottle with a label of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention. For example, in the present embodiment, the panel wall portions 5,... Are provided in a concave shape on the inside, but as shown in FIG. You may do it. That is, the panel wall 5 ″,... Is formed so that the container body 1 ″ forms a so-called regular polygon (in FIG. 4B, a regular hexagon having six protrusions 5 ″,...). Is formed in a flat plate shape. In this case, the container body 1 '' and the cylindrical label 2 are in contact with each other over the entire circumference. However, when the cylindrical label 2 is thermally contracted, the protruding portions 4 '',. By being contacted and fixed, deformation of the container body 1 '' can be prevented. Further, when the moisture-sensitive adhesive 3 is applied to the entire inner peripheral surface of the cylindrical label 2, the cylindrical label 2 is fixed even on the panel wall portion 5 ', so that the container body 1''is further deformed. It becomes difficult to do.
[0027]
As shown in FIG. 4 (a), the container body 1 ′ may have a substantially rectangular shape provided with four protrusions 4 ′. Also in such a container main body 1 ′, the cylindrical label 2 is fixed at the protruding portions 4,..., So that the panel wall portions 5,. This can be prevented by the cylindrical label 2. That is, the container main body 1 ′ includes a plurality of protrusions, and it is only necessary that the protrusions are fixed to the cylindrical label 2, and the number of protrusions is not limited to this embodiment.
[0028]
The trunk portion 10 (FIG. 1) does not need to have a uniform cross-sectional shape. For example, the cross-sectional shape may be partially circular.
[0029]
Although the moisture-sensitive adhesive 3 is applied to the entire inner peripheral surface of the cylindrical label, it may be provided at least in a region in contact with the body 10, that is, a region corresponding to the protruding portions 5.
[0030]
Moreover, in this embodiment, although the moisture sensitive adhesive is apply | coated to the internal peripheral surface of the cylindrical label 2, a heat sensitive adhesive may be sufficient. In this case, by applying heat to the cylindrical label 2, the cylindrical label 2 contracts and adhesiveness is generated in the heat-sensitive adhesive, so that the cylindrical label 2 and the container body 1 can be fixed. . It should be noted that fixing with an adhesive is sufficient if it is pseudo-adhered with a weak adhesive force.
[0031]
【The invention's effect】
As described above, the container with a cylindrical label according to the present invention has an inner peripheral surface of the cylindrical label so as to fix the relative position of the protruding portion of the container main body and the region of the cylindrical label in contact with the protruding portion. An anti-slip agent is provided on the sleeve, and a cylindrical label having a stretch ratio of 3.5 to 6 times in the circumferential direction and a thermal shrinkage rate of 55% or more in 10 seconds of hot water at 80 ° C. is used. Since the distance between adjacent protrusions is prevented from relatively changing by contracting the protrusions so as to be linear, the container body can be reduced even if the thickness of the container body is reduced. Can be prevented from being deformed.
[Brief description of the drawings]
FIG. 1 is a front view showing a container with a cylindrical label according to an embodiment of the present invention.
2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a partially enlarged view of FIG.
FIG. 3 is a perspective view showing a cylindrical label in the embodiment.
4A and 4B are cross-sectional views showing other forms of the container body.
FIG. 5 is a cross-sectional view of a conventional container with a cylindrical label, and shows a deformed state due to an external force.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Container main body, 2 ... Cylindrical label, 3 ... Moisture-sensitive adhesive (anti-slip agent), 4, 4a, 4b, 4c ... Projection part, 5, 5a, 5b, 5c ... Panel wall part, 10 ... Body part 20 ... Film

Claims (1)

A cylindrical label made of a heat-shrinkable film is a container with a cylindrical label fitted on the outer peripheral surface of a plastic bottle-shaped container body, and the container body is provided at intervals in the circumferential direction, A plurality of protrusions that are bent outwardly so as to come into contact with the cylindrical label, and provided between the protrusions, are formed to be bent flatly or concavely toward the inside. As an anti-slip agent, at least the region of the inner peripheral surface of the cylindrical label that is in contact with the protruding portion is provided on the outer peripheral surface of the panel wall portion and prevents a change in the distance between adjacent protruding portions. A heat-sensitive adhesive or a moisture-sensitive adhesive is provided, and the cylindrical label is made of polyester, has a stretch ratio in the circumferential direction of 3.5 to 6 times , and a thermal shrinkage of 80 ° C. with hot water for 10 seconds. straight between protrusions be of more than% Cylindrical labeled container characterized in that it contracts so.

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