JP5732750B2 - Plastic container - Google Patents

Description

  The present invention relates to a synthetic resin container in which a belt-like wound label is mounted on a container body.

  Conventionally, a synthetic resin container formed by forming a preform using a synthetic resin such as polyethylene terephthalate and then molding the preform into a bottle shape by stretch blow molding or the like contains various beverage products. Known as a beverage container.

  In addition, this type of container is filled and sealed with the contents, and various labels for displaying the contents are attached to the market, and one of such labels is cut into a strip shape. A so-called wound label is known, in which the attached label is wound around the body of the container (see Patent Document 1). In order to attach such a wound label to the container, for example, the wound label with the adhesive applied to the start end side and the end end side is sucked and held on the suction drum, and the container is conveyed while rotating. Attaching the winding label along the circumferential direction of the container while pressing the leading end of the winding label against the surface and winding it around the suction drum by the container's rotation, and bonding the terminal end of the winding label against the circumferential surface of the container (See Patent Documents 2 and 3).

JP 2005-22662 A JP 2002-104349 A JP 2008-37439 A

  By the way, as a result of extensive studies by the inventor, it is said that a slight change in the shape of the container affects the quality of the attached label when mounting the wound label as described above. I came to know.

  That is, unlike stretch labels and shrink labels that themselves expand and contract to follow the shape of the container, most of the wound labels are wound around the container without expanding or contracting itself. For this reason, when wound around a container, there is a concern that wrinkles may occur on the wound label that cannot follow the container shape. In particular, when the contents are filled at a high temperature (hot pack), there is a tendency to deform so that the center in the height direction of the container body expands into a rugby ball shape. Wrapping and misalignment may occur on the upper and lower ends of the label, and wrinkles may occur on the end side near the center because the label is wound in a concentrated state. In recent years, with the reduction in weight and thickness of this type of container, such deformation is likely to occur, but such a change in the shape of the container causes poor appearance such as wrinkles on the wound label attached to the container. The present inventor has paid attention to the fact that this is the cause of the above.

  The present invention has been made in view of the circumstances as described above, and has poor appearance such as wrinkles on the wound label when the wound label is attached by winding along the circumferential direction of the container body. The object is to provide a synthetic resin container that can be suppressed.

The synthetic resin container according to the present invention is a synthetic resin container having a mouth portion, a shoulder portion, a body portion, and a bottom portion, and a belt-like wound label attached to the body portion, and a range in which the wound label is attached. In the above, the circumference of the trunk is shorter toward the center in the height direction of the range where the wound label is attached , and the circumference of the trunk on the upper end side of the area where the wound label is attached, The circumferential length of the barrel portion on the lower end side becomes equal, and the circumferential length in the center in the height direction of the range where the wound label is attached is set to 99.99 of the circumferential length of the barrel portion on the upper end side or the lower end side. It is set as 0 to 99.9% .

  ADVANTAGE OF THE INVENTION According to this invention, when winding a winding label along the circumferential direction of a container trunk | drum and mounting | wearing, it can suppress that a wrinkle arises in a winding label.

It is a front view showing an outline of an embodiment of a synthetic resin container according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view schematically showing a synthetic resin container according to the present embodiment.

  In the present embodiment, the container 1 is illustrated by, for example, biaxially stretching blow-molding a bottomed cylindrical preform made of a thermoplastic resin manufactured by known injection molding or compression molding. It is formed into a predetermined container shape having a mouth portion 2, a shoulder portion 3, a body portion 4, and a bottom portion 5.

  As the thermoplastic resin used to mold the container 1, any resin can be used as long as stretch blow molding is possible. Specifically, thermoplastic polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polylactic acid or copolymers thereof, those blended with these resins or other resins are suitable. It is. In particular, an ethylene terephthalate thermoplastic polyester such as polyethylene terephthalate is preferably used. Further, acrylonitrile resin, polypropylene, propylene-ethylene copolymer, polyethylene and the like can be used.

  In the illustrated example, the mouth portion 2 is formed in a cylindrical shape, and a screw thread for attaching a lid body (not shown) is provided on the side surface on the opening end side of the mouth portion 2 as lid body attaching means. Yes. Thereby, after filling the contents, the inside of the container 1 can be sealed by attaching the lid to the mouth portion 2.

The shoulder portion 3 is located between the mouth portion 2 and the trunk portion 4 and is formed so as to continue to the trunk portion 4 while expanding the diameter from directly below the mouth portion 2. Although the trunk | drum 4 is a part which occupies most of the height direction of the container 1, it does not show in particular in figure, The cross section orthogonal to a height direction is made into the square which rounded the corner | angular part. Thereby, the container 1 is made into the square bottle-shaped container shape. And the winding | wrapping label for displaying the content with which the container 1 is filled and sealed is mounted | worn with such a trunk | drum 4. FIG.
It should be noted that the side surface of the body portion 4 can be appropriately provided with a concavo-convex shape as necessary, such as a reduced pressure absorption panel or a reinforcing rib. In the present invention, the height direction means a direction along a direction perpendicular to the horizontal plane when the container 1 is placed on the horizontal plane with the mouth portion 2 facing up.

A range in which the wound label cut and arranged in a belt shape is attached is indicated by a symbol L in FIG. 1. In the present embodiment, in the range L in which the wound label is attached, the circumference of the body portion 4 is The length of the range L in which the wound label is attached is shortened toward the center in the height direction.
Here, the circumferential length of the trunk portion 4 is the length when the circumference of the trunk portion 4 is measured along a direction orthogonal to the height direction using a measuring instrument such as a tape measure. It is not the length measured by faithfully tracing the uneven shape formed on the side surface of 4.

The circumferential length at the center in the height direction of the range L where the wound label is attached at this time is such that the body part 4 expands when the contents are filled and sealed and the wound label is attached to the body part 4. Even if it is deformed, it is adjusted as appropriate so as not to exceed the maximum perimeter of the expanded body 4. For this purpose, in the state before the contents are filled and sealed, the circumference of the barrel 4 on the upper end side of the range L where the wound label is attached is equal to the circumference of the barrel 4 on the lower end side. At the same time, it is preferable to set the circumferential length in the center in the height direction of the range L where the wound label is attached to 95.0 to 99.9% of the circumferential length of the body portion 4 on the upper end side or the lower end side. Preferably, it is 99.0 to 99.9%.
Moreover, even if the trunk | drum 4 swells when the content is filled and sealed, the maximum circumference of the trunk | drum 4 at that time is the upper end side and lower end side of the height direction of the range L where the winding label is mounted | worn It is preferable to adjust appropriately so as to be up to about + 2.5% with respect to the circumferential length of the body part 4 of the upper part, more preferably within + 1%, particularly preferably the upper part of the body part 4 on the upper end side and / or the lower end side. Do not exceed the circumference. If the circumference of the body part before filling and sealing is within the above range, the deformation during filling can be easily adjusted.

In this way, when the contents are filled and sealed and the winding label is attached to the body part 4, even if the body part 4 is deformed so as to expand, the height of the range L where the winding label is attached Since the side surface of the body portion 4 at the center in the direction is curved so as to be convex inward of the container, when the wound label is wound around the side surface of the body portion 4, Both end edges of the wound label are pulled, thereby preventing the wound label from being wrinkled.
However, if the circumferential length of the center in the height direction of the range L where the wound label is mounted becomes too short because it deviates from the above-described range, the label tends to become loose and tends to be wrinkled. is there.

Moreover, in the example shown in FIG. 1, the waist part 40 is provided so that the height direction substantially center of the site | part L where a winding label is mounted | worn may be narrowed down to radial direction, By this waist part 40, upper trunk | drum 4a and The lower body 4b is divided. Such a waist portion 40 is provided along the circumferential direction of the body portion 4 in order to increase the rigidity in the vicinity of the center of the container 1 in the height direction.
In such an aspect, when the wound label is mounted across the waist portion 40, the circumferential length at the boundary between the upper body portion 4a and the waist portion 40 is set at the upper end side of the range L where the wound label is mounted. The circumference of the trunk 4 is 95.0-99.9%, more preferably 99.0-99.9%, and the circumference at the boundary between the lower trunk 4b and the waist 40 is attached with a wound label. 95.0 to 99.9%, more preferably 99.0 to 99.9%, of the circumference of the body 4 on the lower end side of the range L, so that the circumference of the body 4 becomes the winding label. It is preferable that the portion L to be attached becomes shorter toward the center in the height direction.

  Although the present invention has been described with reference to the preferred embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. .

  For example, in the above-described embodiment, a rectangular bottle-shaped container having a rectangular cross section orthogonal to the height direction of the body portion 4 is formed into a square shape, but the container 1 is shaped like a round bottle. It can also be.

  The synthetic resin container according to the present invention as described above can be applied to various synthetic resin containers to which a wound label is attached.

DESCRIPTION OF SYMBOLS 1 Container 2 Mouth part 3 Shoulder part 4 trunk | drum 4a upper trunk | drum 4b lower trunk | drum 40 waist part 5 bottom part

Claims (3)

A synthetic resin container having a mouth portion, a shoulder portion, a trunk portion, and a bottom portion, and a belt-like wound label attached to the trunk portion,
In the range where the wound label is attached, the circumference of the body portion is shorter toward the center in the height direction of the range where the wound label is attached,
While the circumference of the barrel on the upper end side of the range where the wound label is attached and the circumference of the barrel on the lower end side are equal,
Synthetic resin characterized in that the circumferential length in the center in the height direction of the range in which the wound label is attached is 99.0 to 99.9% of the circumferential length of the barrel portion on the upper end side or the lower end side Made container. A synthetic resin container having a mouth portion, a shoulder portion, a trunk portion, and a bottom portion, and a belt-like wound label attached to the trunk portion,
In the range in which the wound label is attached, the circumference of the trunk portion is shortened toward the center in the height direction of the range in which the wound label is attached,
The waist part is divided into an upper trunk part and a lower trunk part by a waist part provided so as to narrow down the approximate center in the height direction of the part where the wound label is mounted, in the radial direction,
In attaching a wound label across the waist,
The circumferential length at the boundary between the upper body portion and the waist portion is 99.0 to 99.9% of the circumferential length of the body portion on the upper end side of the range where the wound label is attached, A synthetic resin container, wherein a circumference at a boundary with the waist portion is 99.0 to 99.9% of a circumference of the body portion on a lower end side of a range where a wound label is attached.   When the wound label is attached to the barrel portion after filling and sealing the contents, the maximum circumference when the barrel portion is deformed to expand is the upper end in the height direction of the range where the wound label is attached. The synthetic resin container according to claim 1 or 2, wherein the circumference of the trunk and / or the circumference of the trunk on the lower end side are not exceeded.

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