JP2006151479A - Film applied container and method of manufacture the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for applying a heat shrinkable film to a container without causing a window of a cylindrical heat shrinkable film to be substantially shrunk, and a film applied container in which uneven shrinkage at the window of the heat shrinkable film is prevented. <P>SOLUTION: A cylindrical heat shrinkable film 1 having a window 2 at a part in its circumference is applied to cover a container 3 and then a heating medium is blown against only a portion of the heat shrinkable film 1 except the window 2, thereby steam is injected only through a steam pipe 61 on one side at a steam tunnel 6, the portion of the heat shrinkable film 1 except the window 2 is shrunk and the heat shrinkable film 1 is applied to the container 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a container equipped with a tubular heat-shrinkable film and a method for producing the same.

In recent years, for example, containers such as PET bottles filled with soft drinks and bottle containers filled with beer are often provided with cylindrical heat-shrinkable labels. In order to attach such a heat-shrinkable label to a container, a long tubular body of a heat-shrinkable label folded in a flat shape is usually opened by a mandrel, and then cut to a predetermined length. The heat-shrinkable label is put on the container, and then the heat-shrinkable label is heat-shrinked by passing through a steam tunnel or hot air tunnel and spraying steam or heated air to closely adhere to the container (for example, Patent Document 1, Patent Document) 2).
JP-A-6-48424 JP 2003-261171 A

  In the conventional heat-shrinkable label mounting method, the heat-shrinkable label is generally thermally shrunk by a heating medium blown from both sides of the container transport direction in the steam tunnel or hot-air tunnel. .

  However, the pattern on the lower side of the heat-shrinkable film is displayed, and the window portion is printed in a circumferential direction where a high finish accuracy is required in relation to the pattern or the like. When applied to a part of the film, the heat-shrinkable label as a whole is thermally contracted as described above, so that there is a possibility that the printing of the window part is unevenly contracted and the finishing accuracy of the window part is lowered. .

  The present invention has been made in view of such a situation, and a method of mounting a heat-shrinkable film on a container without substantially shrinking a window portion of a tubular heat-shrinkable film, and heat shrinkage It aims at providing the film mounting container which prevented the shrinkage | contraction unevenness of the window part of an adhesive film.

  In order to achieve the above object, first, the present invention provides a method for manufacturing a film-mounted container in which a cylindrical heat-shrinkable film having a window is mounted on the container. Provided is a method for manufacturing a film mounting container, wherein the heat shrinkable film is mounted by spraying a heating medium only on a portion except for the window portion (claim 1). Here, the “window portion” is a portion where a pattern or the like existing on the lower side of the heat-shrinkable film can be displayed, and it is desirable that there is no shrinkage unevenness due to heat shrinkage.

  According to the said invention (invention 1), since a heating medium is not sprayed on the window part of a heat-shrinkable film, the window part does not shrink | contract, or can shrink | contract with a very small shrinkage rate. Thereby, it becomes possible to prevent the shrinkage | contraction unevenness of a window part.

  In the said invention (invention 1), it is preferable to spray a heating medium on the said container only from the one side part of the conveyance direction of the said container, conveying the container covered with the said heat-shrinkable film, without rotating ( Claim 2).

  According to the above invention (invention 2), it is possible to use an existing apparatus, for example, a steam tunnel or a hot air tunnel that can control the blowing position of the heating medium.

  In the above inventions (Inventions 1 and 2), on the outer peripheral surface of the container, a pattern in which a plurality of drawing lines having a predetermined width are formed in parallel at a predetermined interval is an interval corresponding to the width of the drawing line. The window portion of the heat-shrinkable film is alternately parallel with linear opaque portions having a predetermined width and linear transparent portions having a predetermined width. A plurality of them may be provided respectively.

  In the above inventions (inventions 1 and 2), a plurality of drawing lines having a predetermined width are inclined on the outer peripheral surface of the container in parallel with a predetermined interval and with respect to the axial direction of the container. The formed pattern is provided with a plurality of positions shifted from each other at intervals corresponding to the width of the drawing line, and the window portion of the heat-shrinkable film is a linear opaque portion having a predetermined width. And a plurality of linear transparent portions having a predetermined width may be provided in parallel with each other so as to incline corresponding to the inclination of the drawing line in the container. ).

  According to the above inventions (Inventions 3 and 4), when the heat-shrinkable film mounted on the outer peripheral surface of the container is moved in the circumferential direction or the axial direction, a plurality of designs are formed from the transparent part of the window part of the heat-shrinkable film. Displayed sequentially. Here, the window portion of the heat-shrinkable film has no unevenness due to heat shrinkage and has a very high finishing accuracy, so that the pattern is accurately displayed from the window portion of the heat-shrinkable film. Such a film-mounted container can give added value to the container itself and improve the customer's willingness to purchase the contents of the container.

  In the said invention (Invention 1-4), the said heat-shrinkable film before covering the said container has a crease | fold, When covering the said heat-shrinkable film on the said container, It is preferable to align the circumferential direction of the heat-shrinkable film and the container using the position of the fold (Claim 5).

  2ndly, this invention is a container by which the cylindrical heat-shrinkable film which has a window part is mounted | worn, Comprising: The window part of the said heat-shrinkable film is not shrink | contracted, or the shrinkage rate is 1% or less. A film mounting container characterized by being contracted is provided (claim 6).

  According to the said invention (invention 6), the shrinkage | contraction unevenness of the window part of a heat-shrinkable film is prevented.

  According to the film mounting container manufacturing method of the present invention, the heat shrinkable film can be mounted on the container without substantially shrinking the window portion of the cylindrical heat shrinkable film. Moreover, according to the film mounting container of this invention, the shrinkage | contraction unevenness of the window part of a heat-shrinkable film can be prevented.

Hereinafter, embodiments of the present invention will be described.
[Production method of film mounting container]
FIG. 1 is a diagram illustrating a method for manufacturing a film mounting container according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a state in a steam tunnel according to the embodiment, and FIGS. d) is a conceptual diagram showing a flow of mounting the heat-shrinkable film in the same embodiment.

  As shown in FIGS. 1 and 3, the heat-shrinkable film 1 in the present embodiment that is a long cylindrical body 10 is folded into a flat shape with two folds 11. In addition, the position of the seal | sticker part (part which joined the both ends of the heat-shrinkable film 1 mutually) of the heat-shrinkable film 1 is not specifically limited.

  A portion of the cylindrical heat-shrinkable film 1 in the circumferential direction is provided with a window portion 2 that is desirably not shrunk. In this embodiment, the window portion 2 is one fold of the heat-shrinkable film 1. 11 is provided so as to substantially include the center of the window portion 2. A detailed configuration of the window portion 2 will be described later.

  The material of the heat-shrinkable film 1 is not particularly limited as long as it is made of a material that can generate a portion that thermally contracts in the circumferential direction and a portion that does not heat-shrink in the circumferential direction, depending on how the heating medium is sprayed. The thermoplastic resin film made can be used. In addition, substantial uniaxial stretching refers to stretching in which stretching in one direction is about 2 to 5 times and stretching in the other direction is about 1 to 1.5 times. As the thermoplastic resin film, for example, a film using a polystyrene resin such as a polystyrene (OPS) film, a film using a polyester resin such as a polyethylene terephthalate (PET) film, etc. can be used. It is preferable to use a film.

  Although the thickness of the heat-shrinkable film 1 is not specifically limited, Usually, it is 10-100 micrometers, Preferably it is 20-60 micrometers.

  The circumferential length of the tubular heat-shrinkable film 1 is preferably 1.01 to 1.15 times, and particularly preferably 1.02 to 1.10 times the outer circumference of the container 3. When the magnification is less than 1.01, it is difficult to cover the heat-shrinkable film 1 on the container 3, and when it exceeds 1.15, the window portion 2 of the heat-shrinkable film 1 is likely to shrink. .

  The ratio of the length in the circumferential direction of the window portion 2 to the length in the circumferential direction of the heat-shrinkable film 1 is preferably 50% or less, and particularly preferably 45% or less. If this ratio exceeds 50%, the side end portion of the window portion 2 of the heat-shrinkable film 1 may shrink.

  As shown in FIGS. 1 and 3, the long tubular body 10 (FIG. 3A) of the heat-shrinkable film 1 folded into a flat shape is opened in a substantially cylindrical shape by a mandrel 51 ( In FIG. 3 (b)), it is cut by the circle cutter 52 so as to have a predetermined height (length in the vertical direction). The cut heat-shrinkable film 1 is put on the outer peripheral surface of the container 3 that has been conveyed by the conveyor 53 (FIG. 3C).

  Here, a pattern portion 4 corresponding to the window portion 2 of the heat-shrinkable film 1 is formed in a part of the container 3 in the circumferential direction. The detailed configuration of the symbol unit 4 will be described later. The heat-shrinkable film 1 is preferably covered on the outer peripheral surface of the container 3 so that the window part 2 of the heat-shrinkable film 1 is positioned on the design part 4 of the container 3. Since the window portion 2 of the heat-shrinkable film 1 is provided so as to include the fold 11 of the heat-shrinkable film 1 at the approximate center of the window portion 2, the center of the pattern portion 4 of the container 3 is the fold of the heat-shrinkable film 1. By positioning and transporting the container 3 on the conveyor 53 so as to be at the position of 11, the window part 2 of the heat-shrinkable film 1 and the pattern part 4 of the container 3 can be aligned.

  As shown in FIG. 1, the container 3 covered with the heat-shrinkable film 1 is conveyed by a conveyor 53 and introduced into a heating area. At this time, the container 3 is transported in a standing state without rotating, with the window portion 2 of the heat-shrinkable film 1 positioned on one side of the transport direction. In the present embodiment, the steam tunnel 6 is used as the heating area, but the present invention is not limited to this. For example, a hot air tunnel can be used.

  As shown in FIGS. 1 and 2, the steam tunnel 6 includes a plurality of steam pipes 61 extending along the transport direction of the container 3 on both sides in the transport direction of the container 3. A plurality of ejection holes 62 are formed in the side portion of the steam pipe 61, and steam can be ejected from the ejection holes 62 toward the center side of the steam tunnel 6. Each steam pipe 61 can individually control the ON / OFF (opening / closing) of the steam ejection.

  As shown in FIG. 2, in the present embodiment, the heat shrinkable film 1 placed on the container 3 is a steam pipe 61 on the side where the window portion 2 does not exist, and corresponds to the height of the heat shrinkable film 1. Steam is ejected from only the steam pipe 61 at the position (second from the bottom in FIG. 2, or second and third). As a result, the heat-shrinkable film 1 does not shrink on the side where the circumferential window portion 2 exists, or shrinks at a very small shrinkage rate, and only the side where the circumferential window portion 2 does not exist greatly shrinks. And it closely_contact | adheres to the outer peripheral surface of the container 3 (FIG.3 (d)).

  When the side of the heat-shrinkable film 1 where the window portion 2 exists contracts, the contraction rate is preferably 1% or less, and particularly preferably 0.5% or less. If the shrinkage rate is so small, shrinkage unevenness does not substantially occur.

  The steam pressure / temperature and the steam tunnel passage time (heating time) of the container 3 may be appropriately adjusted so that the heat-shrinkable film 1 can be heat-shrinked as described above. In addition, if the window part 2 is heat-shrinked with the said shrinkage | contraction rate, steam may be sprayed on the whole heat-shrinkable film 1 near the exit of the steam tunnel 6, and the finish of the heat-shrinkable film 1 whole may be improved. it can.

  Since the window portion 2 of the heat-shrinkable film 1 mounted on the outer peripheral surface of the container 3 in this manner is not substantially shrunk, it has a very high finishing accuracy without causing unevenness due to heat shrinkage.

[Film container]
Next, the film mounting container obtained by the manufacturing method of the film mounting container will be described. FIG. 4 is a side view of the film mounting container according to the embodiment of the present invention, FIG. 5 is a development view of the heat-shrinkable film mounted on the container in the embodiment, and FIG. It is a figure which shows the design part provided in the outer peripheral surface of the container in a form, and Fig.7 (a)-(e) is a figure which shows the transition of the design in the film mounting container of the embodiment.

  As shown in FIG. 4, the film mounting container according to this embodiment includes a container 3 and a heat shrinkable film 1 mounted on the outer peripheral surface of the container 3. Although the container 3 in this embodiment is a can container for beverages, the type (use / material) of the container 3 is not particularly limited as long as it has a cylindrical portion.

  As shown in FIG. 5, a linear opaque portion 21 having a width W1 and a linear transparent portion 22 having a width W2 are alternately arranged in the window portion 2 provided in a part of the heat shrinkable film 1 in the circumferential direction. Are provided in parallel to each other so as to be inclined with respect to the axial direction of the tubular heat-shrinkable film 1 (= the axial direction of the container 3). Such a window portion 2 can be provided by printing an opaque portion 21 on the transparent heat-shrinkable film 1.

  On the other hand, a pattern portion 4 is formed at a position corresponding to the window portion 2 of the heat-shrinkable film 1 on the outer peripheral surface of the container 3 as shown in FIG. The symbol part 4 is provided with a plurality (five in this embodiment) of symbols 40a to 40e, and the symbols 40a to 40e are parallel to each other via the space 42 having a width W4 and in the axial direction of the container 3. It is composed of drawing lines 41a to 41e having a width W3 arranged so as to be inclined. The symbol 40a and the symbol 40b, the symbol 40b and the symbol 40c, the symbol 40c and the symbol 40d, and the symbol 40d and the symbol 40e are provided so as to be shifted from each other at intervals corresponding to the drawing lines 41a to 41e having the width W3. ing. Note that the width W1, the width W2, the width W3, and the width W4 represent widths in the circumferential direction (horizontal direction), respectively.

  The width W1 of the opaque portion 21 of the window portion 2 and the width W4 of the space 42 of the pattern portion 4 are preferably substantially the same, and the width W2 of the transparent portion 22 of the window portion 2 is The width W3 of the drawing portion 41a to 41e is preferably equal to or slightly smaller than the width W3. The width W1 of the opaque portion 21 of the window portion 2 and the width W4 of the space 42 of the symbol portion 4 are the drawing lines of the symbol portion 4. A value obtained by multiplying the width W3 of 41a to 41e by a value obtained by subtracting 1 from the number of symbols (5-1 = 4 in the present embodiment) is preferable.

  Specifically, the width W3 of the drawing lines 41a to 41e of the pattern part 4 is preferably 0.1 to 1.0 mm, and particularly preferably 0.2 to 0.5 mm. When the width W3 of the drawing lines 41a to 41e of the symbol part 4 is within this range, the symbols 40a to 40e can be displayed clearly and vigorously.

  Furthermore, the inclination angle of the opaque part 21 and the transparent part 22 in the window part 2 (the angle with respect to the axis of the container 3; the same applies hereinafter) and the inclination angle of the drawing lines 41a to 41e in the pattern part 4 are substantially the same. The inclination angle is preferably 0 to 80 °, and in order to finish the window portion 2 with high accuracy, it is particularly preferably 0 to 30 °.

  Since the window part 2 and the symbol part 4 have the above-described configuration, the transparent part 22 of the window part 2 displays the drawing lines 41a to 41e of any one of the symbols 40a to 40e of the symbol part 4, and the window The opaque part 21 of the part 2 can hide the drawing lines 41 a to 41 e of the remaining four symbols 40 a to 40 e of the symbol part 4. When the heat-shrinkable film 1 is slid in the circumferential direction of the container 3 at an interval corresponding to the width W3 of the drawing lines 41a to 41e of the design part 4, a plurality of design parts 4 are formed from the transparent part 22 of the window part 2. The symbols 40a to 40e are sequentially displayed. Further, when the inclination angle of the opaque portion 21 and the transparent portion 22 of the window portion 2 and the drawing lines 41a to 41e of the pattern portion 4 is larger than 0 °, particularly 10 to 80 °, the heat-shrinkable film 1 is designed. When the container 3 is slid in the axial direction at intervals corresponding to the width W3 of the drawing lines 41a to 41e of the portion 4, a plurality of symbols 40a to 40e of the symbol portion 4 are sequentially exposed from the transparent portion 22 of the window portion 2. To do.

  Specifically, when the heat-shrinkable film 1 is slid clockwise with respect to the container 3 at intervals corresponding to the width W3 of the drawing lines 41a to 41e of the design part 4, or the container 3 When the heat-shrinkable film 1 is slid from the bottom to the top in the axial direction of the container 3 at an interval corresponding to the width W3 of the drawing lines 41a to 41e of the design portion 4 with respect to FIG. ), The five symbols 40 a to 40 e are sequentially displayed from the transparent portion 22 of the window portion 2, thereby dynamically expressing how the batter swings.

  The window portion 2 of the heat-shrinkable film 1 in the film mounting container having the above-described configuration needs to have high accuracy, and in particular, the opaque portion 21 and the transparent portion 22 of the window portion 2 and the drawing line 41a of the pattern portion 4. When the inclination angle of ˜41e is larger than 0 °, it is necessary to have high accuracy in both the vertical direction and the horizontal direction. However, as described above, the window portion 2 of the heat shrinkable film 1 is caused by heat shrinkage. Since there is no unevenness and the finish accuracy is very high, the drawing lines 41a to 41e of the design part 4 of the container 3 can be accurately seen from the transparent part 22 of the window part 2 of the heat-shrinkable film 1, and the heat-shrinkability. The symbols 40a to 40e that are changed by sliding the film 1 are also accurately displayed.

  The film-equipped container having entertainment as described above can improve the customer's willingness to purchase the contents (in the present embodiment, a beverage).

  The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, the window part 2 in the heat-shrinkable film 1 according to the above-described embodiment may not be provided with a plurality of the opaque parts 21 and the transparent parts 22 alternately as described above. Any design can be used as long as it can be seen through and can be provided with high accuracy corresponding to the design. For example, it may be a window portion having a design such that some design is configured in combination with the design formed on the outer peripheral surface of the container 3, or the colored transparent window portion and the design color of the container 3 may be different. They may be combined to express a new color.

  EXAMPLES Hereinafter, although an Example etc. demonstrate this invention further more concretely, the scope of the present invention is not limited to these Examples etc.

[Example 1]
A cylinder made of a substantially uniaxially stretched PET film (Toyobo Co., Ltd., S7042) with a thickness of 50 μm, a length of 217 mm in the circumferential direction, and a rectangular window portion with a width of 50 mm and a height of 50 mm printed thereon A heat-shrinkable film was prepared, and the heat-shrinkable film was placed on a beverage can container having an outer diameter of 66 mm (outer circumference: 207 mm). Then, a can container (N number of can containers = 7) covered with a heat-shrinkable film is steamed with a plurality of steam pipes on both sides in the conveying direction of the container 3 by a conveyor as shown in FIGS. It was introduced into a tunnel (manufactured by Fujistec, SH-3500).

  In the steam tunnel, in order to prevent steam from directly hitting the window part of the heat-shrinkable film, the steam tube from only one side of the can container in the conveying direction is steamed to the part without the window part in the circumferential direction of the heat-shrinkable film. I tried to spout. The steam temperature was 80 ° C., and the transit time of the can container in the steam tunnel was 4 to 5 seconds.

The heat-shrinkable film was peeled off from the can container equipped with the heat-shrinkable film as described above, the width of the window portion of the heat-shrinkable film was measured, and the heat shrinkage rate was calculated based on the following formula. The results are shown in Table 1.
Heat shrinkage rate (%) = (width before wearing−width after wearing) / width before wearing × 100
In addition, the heat-shrinkable film after container mounting contracted about 4.5% in the outer peripheral direction as the whole film.

  As is clear from Table 1, the window portion where steam was not directly applied in the heat-shrinkable film placed on the can container did not substantially heat-shrink.

  INDUSTRIAL APPLICABILITY The present invention is useful for an amusement container equipped with a heat-shrinkable film having a window portion that desirably has no shrinkage unevenness.

It is a figure which shows the manufacturing method of the film mounting container which concerns on one Embodiment of this invention. It is a figure which shows the state in the steam tunnel in the same embodiment. It is a conceptual diagram which shows the flow of mounting | wearing of the heat-shrinkable film in the embodiment. It is a side view of the film mounting container which concerns on one Embodiment of this invention. It is an expanded view of the heat-shrinkable film with which the container was mounted | worn in the same embodiment. It is a figure which shows the design part provided in the outer peripheral surface of the container in the same embodiment. It is a figure which shows the transition of the pattern in the film mounting container of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heat-shrinkable film 2 ... Window part 21 ... Opaque part 22 ... Transparent part 3 ... Container 4 ... Design part 40a, 40b, 40c, 40d, 40e ... Design 41a, 41b, 41c, 41d, 41e ... Drawing line 42 ... space

Claims (6)

In the manufacturing method of a film mounting container in which a cylindrical heat-shrinkable film having a window is mounted on the container,
A method for producing a film mounting container, wherein the heat shrinkable film is mounted by spraying a heating medium only on a portion of the heat shrinkable film placed on the container and excluding the window portion. .   2. The film mounting container according to claim 1, wherein a heating medium is sprayed on the container from only one side of the container in the conveying direction while the container covered with the heat-shrinkable film is conveyed without being rotated. Manufacturing method. On the outer peripheral surface of the container, there are provided a plurality of symbols formed by forming a plurality of drawing lines having a predetermined width in parallel with a predetermined interval while being shifted from each other at intervals corresponding to the width of the drawing line. And
The window portion of the heat-shrinkable film is provided with a plurality of linear opaque portions having a predetermined width and linear transparent portions having a predetermined width alternately in parallel. Item 3. A method for producing a film mounting container according to Item 1 or 2. On the outer peripheral surface of the container, a pattern is formed in which a plurality of drawing lines having a predetermined width are formed in parallel with a predetermined interval and inclined with respect to the axial direction of the container. It is provided with multiple positions shifted from each other at corresponding intervals,
The window portion of the heat-shrinkable film has a linear opaque portion having a predetermined width and a linear transparent portion having a predetermined width alternately parallel to each other and corresponds to the inclination of the drawing line in the container. A method for manufacturing a film mounting container according to claim 1, wherein a plurality of the plurality of film mounting containers are provided so as to be inclined. The heat-shrinkable film before covering the container has a fold,
When covering the heat-shrinkable film on the container, the position of the heat-shrinkable film and the container are aligned in the circumferential direction using the position of the fold of the heat-shrinkable film. The manufacturing method of the film mounting container of any one of Claims 1-4. A container to which a cylindrical heat-shrinkable film having a window is attached,
The film mounting container, wherein the window portion of the heat-shrinkable film is not shrunk or is shrunk at a shrinkage rate of 1% or less.

Images