Packaging film and package

Abstract

To provide a packaging film and a package which are difficult to counterfeit and can be easily distinguished between an authentic product and an illegal product.SOLUTION: A packaging film 1 according to the present invention comprises: a film body 10; a separation part 11 for separating the film body 10; and a readable part that can be seen as a symbol string formed as a difference in the shape of a front or back surface, and a cross-section of the film body. The readable part is configured as at least a part of the separation part 11.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a packaging film used in a package for packaging an item to be packaged, and to the package. [Background technology]

[0002] A technique using a shrink film is known as a technique for packaging a packaged item. For example, Patent Document 1 discloses a heat-shrinkable shrink film that is formed into a cylindrical shape, inserted into the packaged item, and then heat-shrinks when heated, thereby coming into close contact with the packaged item to form a package. In this cylindrical shrink film, a pair of weakened lines are formed along the axial direction in order to open the package and peel it off from the packaged item. As a result, a strip-shaped portion of the package sandwiched between the pair of weakened lines becomes a tear-off portion, and the package can be separated from the packaged item by cutting the tear-off portion from the other portions along the weakened lines. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-189480 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to prevent the distribution of counterfeit products, products with altered production dates, and other products that are different from genuine products (hereinafter referred to as "illegal products"), various indications indicating that the product is genuine are printed on the surface of shrink film. By placing the printed surface on the weakened line, the indications are destroyed after the package is separated and removed from the packaged item, making it difficult to reproduce products with packaging that has the same indications as the package that has been used.

[0005] However, such markings, including the shrink film that forms the packaging, can easily be forged, and therefore cannot be said to be sufficiently effective in distinguishing genuine products from counterfeit products.

[0006] Therefore, a primary object of the present invention is to provide a packaging film and a package that are difficult to counterfeit and that allow easy discrimination between genuine and counterfeit products. [Means for solving the problem]

[0007] The packaging film of the present invention comprises a film body, a separation portion for separating the film body, and a readable portion that is formed on the front or back surface of the film body and as a difference in the cross-sectional shape and can be seen as a symbol string, wherein the readable portion is configured as at least a part of the separation portion. Effect of the Invention

[0008] According to the present invention, it is possible to obtain the effect that counterfeiting is difficult and it is possible to easily distinguish genuine products from counterfeit products.

[0009] The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention, which refers to the drawings. [Brief description of the drawings]

[0010] [Figure 1] 1 is an external perspective view showing a configuration of a packaging film according to a first embodiment of the present invention. [Diagram 2] 1 is a plan view showing a configuration of a packaging film according to a first embodiment of the present invention. [Diagram 3] 1 is an external perspective view showing the configuration of a package obtained by packaging an item with a packaging film according to a first embodiment of the present invention. [Figure 4] FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. [Diagram 5]5A is an enlarged view of a main portion of a region R in FIG. 2, and FIG. 5B is a schematic cross-sectional view taken along line VV in FIG. 5A. [Figure 6] FIG. 4 is an external perspective view showing a configuration of a packaging film according to a second embodiment of the present invention. [Figure 7] FIG. 4 is a plan view showing a configuration of a packaging film according to a second embodiment of the present invention. [Figure 8] 5 is an external perspective view showing the configuration of a package obtained by packaging an item with a packaging film according to a second embodiment of the present invention. FIG. [Figure 9] (A) is a plan view showing the configuration of a readable portion of a packaging film in a second embodiment of the present invention, (B) is a plan view showing the configuration of a character string in a readable portion of a packaging film in a second embodiment of the present invention, and (C) is a plan view showing another example configuration of a readable portion of a packaging film in a second embodiment of the present invention. [Figure 10] FIG. 2A is a plan view showing the configuration of a packaging film according to another embodiment of the present invention, and FIG. 2B is an external perspective view showing the use of the packaging film according to another embodiment of the present invention. [Figure 11] FIG. 2A is a plan view showing the configuration of a packaging film according to another embodiment of the present invention, and FIG. 2B is an external perspective view showing the use of the packaging film according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] A. First embodiment 1. Packaging films and packaging materials Hereinafter, an example of the packaging film and package according to the first embodiment of the present invention will be described.

[0012] (Packaging film) Fig. 1 is an external perspective view showing the configuration of a packaging film according to a first embodiment of the present invention. Fig. 2 is a plan view as a development showing the configuration of the packaging film according to the first embodiment of the present invention. Fig. 3 is an external perspective view showing the configuration of a package obtained by packaging an article with the packaging film according to the first embodiment of the present invention. Fig. 4 is a schematic cross-sectional view taken along line IV-IV in Fig. 3.

[0013] The packaging film 1 of the first embodiment of the present invention comprises a cylindrical film body 10 and a tear-off portion 11 formed by partitioning a portion of the film body 10 by a weakened line 20 consisting of a first weakened line 20a and a second weakened line 20b.

[0014] The following description will be given mainly with reference to the plan view as an unfolded view shown in Fig. 2. The film body 10 has a rectangular planar shape in an unfolded state, and has a front surface 10F and a back surface 10B surrounded by an upper edge 10a and a lower edge 10b which are a pair of long sides that face each other in a plan view, and a left edge 10c and a right edge 10d which are a pair of short sides that are perpendicular to the upper edge 10a and the lower edge 10b.

[0015] Here, the directions in the description with reference to each figure are defined as follows. The direction along the pair of long sides of the film body 10 (X-axis direction) is the left-right direction or side direction, the side where the left edge 10c is located is the left side, and the side where the right edge 10d is located is the right side. The direction along the pair of short sides of the film body 10 (Y-axis direction) is the up-down direction, the side where the upper edge 10a is located is the upper side, and the side where the lower edge 10b is located is the lower side. The direction perpendicular to both the pair of long sides and short sides of the film body 10 is the front direction or back direction (Z-axis direction), the side where the front side 10F is located is the front side, and the side where the back side 10B is located is the back side. In addition, in the case of a cylindrical film body 10, when the up-down direction (Y-axis direction) is the central axis, the circumferential direction corresponds to the circumference formed by the X-axis, and the radial direction corresponds to the Z-axis. These directions are shown in Cartesian coordinates or cylindrical coordinates shown in each figure, and the following description will be made based on the coordinates shown in the figures as appropriate.

[0016] The film body 10 is configured as, for example, a heat-shrinkable synthetic resin sheet or a heat-shrinkable film that is a laminate of a plurality of such sheets. As the synthetic resin, it is preferable to use OPP (biaxially oriented polypropylene), but other types of heat-shrinkable synthetic resins may be used. The thickness of the film body 10 is not particularly limited, but is preferably 8 μm or more and 100 μm or less. In addition, the film body 10 is not limited by the presence or absence of coloring, the presence or absence of transparency, the presence or absence of surface printing, etc., and these may be configured as desired. The film body 10 may also be a film that does not have heat shrinkability.

[0017] The cut-off portion 11 is composed of a knob portion 10X, which is a portion protruding upward from the upper edge 10a of the film body 10, a cut-out portion 10Y, which is a portion cut out upward from the lower edge 10b of the film body 10 and is located directly below the knob portion 10X, and a band-shaped area surrounded by a first weakened line 20a connecting the left end of the knob portion 10X and the left end of the cut-out portion 10Y and a second weakened line 20b connecting the right end of the knob portion 10X and the right end of the cut-out portion 10Y.

[0018] The tab portion 10X has a trapezoidal planar shape. The contour of the cutout portion 10Y is trapezoidal and corresponds to the planar shape of the tab portion 10X. Therefore, the first weakening line 20a and the second weakening line 20b are formed as a pair of parallel perpendicular lines that cross the upper edge 10a and the lower edge 10b of the film body 10. Note that the planar shape of the tab portion 10X and the contour shape of the cutout portion 10Y are merely examples, and may be rectangular, circular, or any other shape.

[0019] Each of the first weakening line 20a and the second weakening line 20b is shown by a broken line in each figure for convenience of explanation, and is seen as a straight line or a dotted line when observed with the naked eye, but microscopically, it is formed on the film body 10 by processing with a commonly used laser device, for example, a CO2 laser device. It is a row of multiple holes. In the following explanation, the first weakening line 20a is taken as an example, but the second weakening line 20b has a similar configuration.

[0020] As shown in Fig. 5(A), which is an enlarged view of a main portion of the region R in Fig. 2, the first weakening line 20a is seen as a character string 21 in which words 21w are periodically arranged from the front surface 10F side in a plan view of the film body 10. As an example, the word 21w is the word "HONMONO" (real thing) consisting of four katakana characters 21a "HO", 21b "N", 21c "MO", and 21d "NO". The type of characters in the character string 21 may be hiragana, kanji, or the alphabet. Or, it may be a mixture of these.

[0021] Also, the first weakening line 20a is considered to be a character string like the character string 21, but it may be any symbol string. In this invention, a "symbol string" is represented by each of letters, numbers, symbols, and figures, and any combination thereof. In this invention, "symbol" means each of the letters, numbers, symbols, and figures that make up the "symbol string." In other words, a symbol string also includes logos and marks.

[0022] The size of each of the characters 21a to 21d is preferably 0.3 mm to 0.5 mm on average. As a result, the characters 21a to 21d are large enough that they cannot be seen by the naked eye, regardless of whether the packaging film 1 is thermally shrunk or not. As a result, the first weakened line 20a is a character string 21 including the word 21w, which can be seen by observing through a magnifying glass or other optical equipment, and has the advantage of being difficult to imitate. Examples of conditions for the laser processing required to form the character string 21 are appropriately adjusted depending on the size of the cut-off portion 11.

[0023] Next, as shown in Fig. 5(B), which is a schematic cross-sectional view taken along line VV in Fig. 5(A), the first weakened line 20a is formed as a row of a plurality of holes 10S penetrating from the front surface 10F to the back surface 10B in a cross-sectional view of the film body 10. The opening shapes of the holes 10S correspond to the planar shapes of the characters 21a to 21d. Therefore, the holes 10S have different shapes at any cross section within the line width W of the first weakened line 20a depending on these planar shapes.

[0024] In other words, the film body 10 has a readable portion that can be seen as a character string 21 in which words 21w are periodically arranged, and the readable portion is formed as a weakened line 20 of the film body 10. In this case, the readable portion is configured as a cut-off portion 11.

[0025] In the separation portion 11, as shown in FIG. 2, a core material 12 is provided that extends vertically across the tab portion 10X and the notch portion 10Y. The core material 12 is made of the same material as the film body 10 or a different material having heat shrinkability. The core material 12 is provided in the separation portion 11 by being attached to the front surface 10F or back surface 10B of the film body 10 when the film body 10 is a single sheet, or by being inserted between the layers when the film body 10 is a laminate of multiple sheets. The core material 12 acts as a reinforcing material for the separation portion 11, and prevents the separation portion 11 from breaking vertically when the separation portion 11 is operated. However, the core material 12 may be omitted.

[0026] Furthermore, a fold line 10L is provided along the left and right sides of the film body 10 near the upper edge 10a and below the tab portion 10X. The film body 10 is divided into a side surface portion 13 and an end surface portion 14 by the fold line 10L.

[0027] The sheet-like packaging film 1 shown in Fig. 2 is processed by folding the fold line 10L of the film body 10 at a right angle from the front surface 10F to the back surface 10B, rolling the film body 10 around the vertical axis, and overlapping one of the left edge 10c and the right edge 10d with the other side and welding or bonding them. In Fig. 1, the right edge 10d is overlapped with the left edge 10c. As a result, the packaging film 1 forms a cylindrical outer shape with an upper opening OP1 defined by the upper edge 10a, a lower opening OP2 defined by the lower edge 10b, and an annular end surface portion 14 formed around the upper opening OP1, as shown in Fig. 1.

[0028] In the cylindrical packaging film 1, the side surface portion 13 corresponds to the side surface of the cylinder, the end surface portion 14 corresponds to the top surface of the cylinder, and the fold line 10L corresponds to the boundary between the side surface and the top surface of the cylinder. Thus, an article to be packaged is inserted into the lower opening OP2 formed by the lower edge 10b, and is engaged with the annular end surface portion 14, whereby the packaging film 1 is temporarily attached to the article to be packaged.

[0029] (Packaged items and packages) The packaged item and the package will be described with reference to Figs.

[0030] The packaged item 100 is an item consisting of a liquid such as a beverage, medicine, or cosmetic and a container for containing the liquid. However, the packaged item 100 is not limited in type, function, purpose, or the like.

[0031] The packaged item 100 comprises a cylindrical main body 101, a cylindrical neck 102 protruding upward from the main body 101, and a cylindrical lid 103 that closes the neck 102. The main body 101 and the neck 102 are examples of the container body of the present invention, and the lid 103 is an example of the lid of the present invention.

[0032] The body 101, neck 102 and lid 103 are arranged coaxially, and the outer diameter of the neck 102 is smaller than the outer diameter of the lid 103. As a result, the surfaces of the neck 102 and lid 103 of the packaged item 100 are uneven when viewed in the Z-axis direction in the figure.

[0033] The packaging body 1S is a member that packages the packaged item 100. The packaging body 1S is formed by inserting a cylindrical packaging film 1 into the lid portion 103 of the packaged item 100, and by thermally shrinking while temporarily attached, the packaging body 1S deforms to conform to the shape of the neck portion 102 and the lid portion 103, and adheres closely to their surfaces. As a result, the packaging body 1S packages the neck portion 102 and the lid portion 103 while taking a shape that is an enlarged version of the irregularities in their external shapes. The lid portion 103 of the packaged item 100 packaged in the packaging body 1S is exposed to the outside through an upper opening OP1. Note that in FIG. 4, only the packaging body 1S is shown as a cross-sectional view.

[0034] The package 1S is opened by pinching the tab 10X, pulling the tear-off portion 11 radially out from the package 1S, and pulling it downward. This causes the tear-off portion 11 to be cut off from the film body 10 along the weakened line 20, and the package 1S can be separated from the packaged item 100.

[0035] The packaging film 1 of the first embodiment according to the present invention includes a film body 10, a separation portion 11 for separating the film body 10, and a readable portion. The readable portion is formed as a weakened line 20 of the film body 10, and is configured as the separation portion 11. That is, the packaging film 1 has a readable portion that can be seen as a character string 21 in which words 21w are periodically arranged from the front surface 10F side in a plan view of the film body 10, and the readable portion is the weakened line 20 for separating the separation portion 11 from the film body 10. The weakened line 20 is formed as a series of a plurality of holes 10S having characters 21a to 21d as opening shapes that are at least large enough to be invisible to the naked eye.

[0036] As a result, when observed with the naked eye, the weakened line 20 appears as a conventional weakened line such as a perforation, and therefore even if the packaging film 1 is counterfeited, the configuration of the weakened line 20 as the character string 21 is easily overlooked, making it difficult to counterfeit. Therefore, there is a very low risk that the configuration of the weakened line 20 as the character string 21 is included in the counterfeit packaging film 1, making it easy to distinguish between genuine products and fraudulent products that include counterfeit packaging films.

[0037] The character string 21 as the weakened line 20 may be any word or phrase, but is preferably a word or phrase related to the packaged item 100. Specifically, if the packaged item 100 is a product, the product name, the name of the manufacturer / seller, or other trademarks related to the product may be used. The character string 21 may be configured to periodically arrange words 21w, or the weakened line 20 as a whole may be configured to form a continuous word or sentence.

[0038] Furthermore, since the weakened line 20 has an opening shape that matches the planar shape of each of the characters 21a to 21d, it has a different shape at any cross section within the line width depending on these planar shapes, such as the first weakened line 20a shown in Figure 5(B).

[0039] As a result, the separation surface between the separation portion 11 and the film body 10 is formed in an irregular pattern, which has a more prominent appearance than the separation surface having a regular pattern formed by conventional separation along weakened lines such as perforations. Therefore, defects such as unauthorized opening of the packaging film 1 can be easily detected.

[0040] Furthermore, the size of each of the characters 21a to 21d is preferably 0.3 mm to 0.5 mm square, so that the characters 21a to 21d are large enough to be invisible to the naked eye, regardless of whether the packaging film 1 is thermally shrunk or not, making it easier to overlook the configuration of the weakened line 20 and making it difficult to counterfeit the packaging film 1.

[0041] As described above, according to the first embodiment of the present invention, it is possible to make counterfeiting difficult and to easily distinguish between genuine and counterfeit products.

[0042] B. Second embodiment 1. Packaging films and packaging materials Hereinafter, a packaging film and a package will be described in a second embodiment as an example of the present invention.

[0043] (Packaging film) Fig. 6 is an external perspective view showing the configuration of a packaging film according to a second embodiment of the present invention. Fig. 7 is a plan view as a development showing the configuration of a packaging film according to the second embodiment of the present invention. Fig. 8 is an external perspective view showing the configuration of a package obtained by packaging an article with the packaging film according to the second embodiment of the present invention. However, the same reference numerals are used for the same or corresponding configurations as those in the first embodiment shown in Figs. 1 to 5, and detailed description of the common configurations is omitted.

[0044] The tear-off portion 11 in the packaging film 2 of the second embodiment of the present invention is composed of a tab portion 10X which is a portion protruding upward from the upper edge 10a of the film body 10, a cutout portion 10Y which is a portion cut upward from the lower edge 10b of the film body 10 and is located directly below the tab portion 10X, and a region sandwiched between a straight line connecting the left end of the tab portion 10X to the left end of the cutout portion 10Y and a straight line connecting the right end of the tab portion 10X to the right end of the cutout portion 10Y. The planar shape of the tab portion 10X and the outline shape of the cutout portion 10Y are the same as those in the first embodiment.

[0045] In the cut-off portion 11, a plurality of weakened lines 30a are provided that cross in the vertical direction from the knob portion 10X to the cut-out portion 10Y.

[0046] The weakening lines 30a are shown in each drawing as dashed lines or white dashed lines for the sake of convenience of explanation, and are seen as a straight line or dotted line when observed with the naked eye, but are actually a row of fine through holes formed on the film body 10 by processing with a commonly used laser device. This laser processing is performed, for example, with a CO2 laser device. For example, the through holes have an oval or rectangular opening shape with a length of 0.5 mm and a width of any dimension, and are arranged at equal intervals of 0.5 mm to form the weakening lines 30a having a perforation-like pattern. However, the length dimension, interval, and opening shape of the through holes may be any value and any shape depending on the application of the packaging film 2.

[0047] Furthermore, in the cut-off portion 11, as shown in Fig. 9(A) which is an enlarged view of a main portion, a readable portion 31 is provided in a manner overlapping a plurality of weakened lines 30a. That is, the readable portion 31 is configured as a part of the cut-off portion 11. As particularly shown in Fig. 7 and Fig. 9(A), the readable portion 31 is a character string provided in an area indicated by a virtual long chain line in the cut-off portion 11.

[0048] The readable portion 31 is a portion that is composed of a character string 31a that is perceived as a string of characters, with the character string being a row of minute through holes having a perforation-like pattern, similar to the weakened line 30a. For ease of explanation, the character string 31a is shown by a dashed line in Figures 6 and 8, and by a hollow dashed line in Figures 7 and 9.

[0049] As an example, character string 31a is a single word "HONMONO" consisting of four katakana characters "HO", "N", "MO", and "NO" as shown in the figure. The character type of character string 31a may be hiragana, kanji, or alphabet, or may be a mixture of these. FIG. 9(C) shows an example in which character string 31a is a single word "HONMONO" consisting of seven alphabet characters "H", "O", "N", "M", "O", "N", and "O".

[0050] The character string 31a is formed by processing using a commonly used laser device, similar to the formation of the weakened line 30a. This laser processing is performed, for example, using a CO2 laser device. The character string 31a and the weakened line 30a may be formed together in the same process, or may be formed sequentially in different processes. Note that, for example, the conditions of the laser processing required to form the character string 31a are appropriately adjusted depending on the size of the cut-off portion 11.

[0051] The through holes constituting the weakened line 30a and the through holes constituting the character string 31a may be formed so as to overlap each other, or may be formed without overlapping each other. Figures 7 and 9(A) show a state in which all the through holes constituting the character string 31a are formed, and some of the through holes constituting the weakened line 30a are not formed at positions that overlap the character string 31a. It is also possible that all the through holes constituting the weakened line 30a are formed, and some of the through holes constituting the character string 31a are not formed at positions that overlap the weakened line 30a.

[0052] In the readable portion 31, a plurality of weakened lines 30a formed by through holes and a character string 31a drawn by a row of through holes are mixed. As a result, the character string 31a is buried in the weakened lines 30a and is displayed in a hidden manner. Therefore, in normal observation by the naked eye, it is difficult to notice that the cut-out portion 11 includes the readable portion 31, which has the advantage of being difficult to imitate.

[0053] It is preferable that the lines of the weakened line 30a and the characters 31a are formed of through holes of the same shape and size and have the same perforation pattern, i.e., have the same form. This has the advantage that it is more difficult to distinguish between the weakened line 30a and the characters 31a at the cut-off portion 11. It also has the advantage that the conditions for laser processing can be made uniform. However, the lines of the weakened line 30a and the characters 31a may have different forms. In addition, in Figs. 9(A) and (C), in order to clarify the display of the readable portion 31 in the drawings, the lines of the weakened line 30a and the characters 31a are shown as different patterns for convenience.

[0054] In the detachment portion 11, as in the first embodiment, a core material extending vertically across the knob portion 10X and the notch portion 10Y may be provided. The core material acts as a reinforcing material for the detachment portion 11, and prevents the detachment portion 11 from breaking vertically when the detachment portion 11 is operated.

[0055] (Packaged items and packages) The configuration of the packaged item 100 is the same as in the first embodiment, and a detailed description thereof will be omitted.

[0056] The packaging body 2S is a member for packaging the packaged item 100, and as shown in Figs. 8 and 3, the details of its configuration are similar to those of the packaging body 1S of the first embodiment 1, and therefore a detailed description thereof will be omitted.

[0057] The package 2S is opened by pinching the gripping portion 10X, pulling the tear-off portion 11 out from the package 2S in the radial direction, and pulling it downward. This causes the tear-off portion 11 to be cut off from the film body 10 along the extension direction of the multiple weakened lines 30a, and the package 2S can be separated from the packaged item 100.

[0058] The packaging film 2 of the second embodiment according to the present invention includes a film body 10, a separation portion 11 for separating the film body 10, and a readable portion 31, and the readable portion 31 is included in the separation portion 11. That is, in the packaging film 2, at the separation portion 11 for separation from the film body 10, a plurality of weakened lines 30a formed by through holes and a character string 31a drawn by the row of through holes are mixed, and the character string 31a is displayed in a hidden manner, being buried in the plurality of weakened lines 30a.

[0059] Therefore, in normal observation with the naked eye, it is difficult to notice that the readable portion 31 is included in the cut-off portion 11. As a result, even if the packaging film 1 is counterfeited, the configuration of the readable portion 31 is easily overlooked, making it difficult to counterfeit. This makes it easy to distinguish between genuine products and illegal products that contain counterfeit packaging films.

[0060] Furthermore, by including the readable portion 31, the pattern of the weakened lines 30a in the tear-off portion 11 and the character strings 31a in the readable portion 31 are mixed together, and the pattern of the through holes that form the weakened lines 30a and the character strings 31a does not have regularity as a whole. As a result, the tear-off surface between the tear-off portion 11 and the film body 10 is formed as an irregular pattern for each packaging film 2, and the appearance of the tear-off surface is more prominent than the regular pattern of a tear-off surface formed by the conventional tear-off of weakened lines such as perforations. Therefore, defects such as unauthorized opening of the packaging film 2 can be easily detected.

[0061] The character string in the readable portion 31 may be any word or phrase, but is preferably a word or phrase related to the packaged item 100. Specifically, if the packaged item 100 is a product, the product name, the name of the manufacturer / seller, or other trademarks related to the product may be used. The character string may also be configured to have a plurality of words arranged periodically.

[0062] It is preferable that the lines of weakening 30a and the lines of character string 31a are made of through holes of the same shape and size, and have the same perforation pattern, i.e., have the same configuration. This makes it more difficult to distinguish between the lines of weakening 30a and the character string 31a of the readable portion 31 at the tear-off portion 11, making it easier to overlook the configuration of the readable portion 31 and making counterfeiting of the packaging film 1 more difficult.

[0063] As described above, according to the second embodiment of the present invention, it is possible to make counterfeiting difficult and to easily distinguish between genuine and counterfeit products.

[0064] C. Other embodiments The packaging films in each embodiment of the present invention are exemplified as packaging film 1 and packaging film 2, which deform by thermal shrinkage to adhere closely to the surface of the packaged item 100, but the film may also be one that does not shrink.

[0065] 10(A) is a plan view showing a packaging film 4 that does not have shrinkability or is used without utilizing shrinkability. The packaging film 4 has a film body 40 having a rectangular planar shape. The film body 40 has a front surface 40F and a back surface 40B surrounded by an upper edge 40a and a lower edge 40b, which are a pair of long sides that face each other in a plan view, and a left edge 40c and a right edge 40d, which are a pair of short sides that are perpendicular to the upper edge 40a and the lower edge 40b.

[0066] In the packaging film 4, the weakened line 41 is formed as a single perpendicular line crossing the center of each of the upper edge 40a and the lower edge 40b of the film body 40. The configuration of the weakened line 41 is the same as that of the first weakened line 20a or the second weakened line 20b of the weakened line 20 in the first embodiment, and therefore a detailed description thereof will be omitted.

[0067] 11(A) is a plan view showing a packaging film 5 that does not have shrinkage or is used without utilizing shrinkage. The packaging film 5 has a film body 40 that has a rectangular planar shape similar to the packaging film 4.

[0068] In the packaging film 5, the tear-off portion 51 is formed as a strip of a predetermined width that crosses the center of each of the upper edge 40a and the lower edge 40b of the film body 40. The tear-off portion 51 includes a readable portion 52 provided on the inside in the region indicated by the long chain line in the figure. The detailed configurations of the tear-off portion 51 and the readable portion 52 are the same as those of the tear-off portion 11 and the readable portion 31 in the second embodiment, and detailed description thereof will be omitted.

[0069] As shown in Fig. 10(B), the packaging film 4 covers the opening 6X of the open-box-shaped storage container 6 to package the packaged item PI in the storage container 6. The packaging film 4 can be opened by pinching and pulling both the left and right sides of the weakened line 41 to separate the weakened line 41. Similarly, as shown in Fig. 11(B), when the packaging film 5 covers the opening 6X of the storage container 6, the packaging film 4 can be opened by pinching and pulling both the left and right sides of the tear-off portion 51 to separate the tear-off portion 51.

[0070] Thus, the packaging film of the present invention is not limited by its properties, shape, packaging mode of the packaged item, etc., so long as it can be used to package the packaged item.

[0071] In addition, in the packaging film according to each embodiment of the present invention, the weakened lines 20 and 41 are considered to be character strings such as the character string 21, but they may be any symbol string. In the packaging film according to each embodiment of the present invention, the readable portions 31 and 52 are considered to be character strings such as the character string 31a, but they may be any symbol string. In this invention, a "symbol string" is represented by each of letters, numbers, symbols, and figures, and any combination thereof. In this invention, a "symbol" means each of the letters, numbers, symbols, and figures that make up a "symbol string." In other words, a symbol string also includes logos and marks.

[0072] In addition, in the packaging film 1 of the first embodiment of the present invention, each of the characters 21a to 21d of the word 21w constituting the character string 21 is described as being at least large enough to be invisible to the naked eye, regardless of whether or not the packaging film 1 is thermally shrunk. However, the characters may be large enough to be visible to the naked eye before the film body is thermally shrunk, and may shrink to an invisible size after the film body is thermally shrunk.

[0073] In addition, in the packaging film according to each embodiment of the present invention, the weakened lines 20, 30a, and 41, as well as the readable portions 31 and 52, are described as a row of holes or through-holes penetrating the film body 10 from the front surface 10F to the back surface 10B by processing with a commonly used laser device, but the weakened lines may have different shapes on the front surface or back surface of the film body, and in the cross section. Therefore, in addition to holes or through-holes, they may be formed as depressions on the front surface or back surface, or both. In addition to processing with a commonly used laser device, they may be formed by plastic processing, cutting processing, or any other known and commonly used technical means. This laser processing is performed, for example, with a CO2 laser device.

[0074] Furthermore, the packaging film in each embodiment according to the present invention includes a film body 10 and a tear-off portion 11 that tears off the film body 10, and includes a readable portion that can be seen as the above-mentioned "symbol string" such as character string 21, character string 31a, etc., as weakened line 20 and weakened line 41 or readable portion 31 and readable portion 52, but the readable portion of the present invention may be included in the tear-off portion. In other words, the readable portion of the present invention is not limited by the specific manner in which it is included in the tear-off portion.

[0075] As described above, the embodiment of the present invention has been disclosed in the above description, but the present invention is not limited to this.

[0076] In other words, various modifications can be made to the above-described embodiments and each modified example in terms of mechanism, shape, material, quantity, position, arrangement, etc. without departing from the scope of the technical idea and purpose of this invention, and such modifications are included in this invention. [Explanation of symbols]

[0077] 1, 2, 4, 5 Packaging film 1S, 2S packaging 6 Storage Containers 6X opening 10, 40 film body 10B, 40B back side 10F, 40F surface 10S hole 10X Knob 10Y Cutout 10a, 40a Upper edge 10b, 40b Lower edge 10c, 40c left edge 10d, 40d right edge 11, 51 Separation part 12 Core material 13 Side part 14 End section 20, 30a, 41 Weakened lines 20a First weakened line 20b Second weakened line 21, 31a Text string 21w Single Language 21a, 21d, 21c, 21d Text 31, 52 can be read 100 Packaged items 101 Body part 102 Neck 103 cover

Claims

1. The film body, A separation section that separates the film body; A readable portion that can be seen as a symbol string is formed as a difference in the shape of the front or back surface and cross section of the film body, The readable portion is configured as at least a part of the detachable portion. Packaging film.

2. The separation portion has one or more weakened lines formed on the film body, The readable portion is formed as the weakened line of the film body. The packaging film according to claim 1.

3. The cutting portion is A plurality of lines of weakness formed on the film body, The symbol string of the readable portion is surrounded by the plurality of lines of weakness. The packaging film according to claim 1.

4. The size of each symbol in the symbol string is 0.3 mm square or more and 0.5 mm square or less. The packaging film according to claim 2.

5. the aspect of each of the plurality of weakened lines is the same as the aspect of a line depicting each symbol in the symbol string of the readable portion; The packaging film according to claim 3.

6. The symbol string is a character string. The packaging film according to claim 1.

7. The film body is a heat shrinkable film. The packaging film according to claim 1.

8. A package comprising the packaging film according to claim 1 formed in intimate contact with the surface of an article to be packaged.

9. A package formed by adhering the packaging film according to claim 2 to the surface of an article to be packaged, A package in which each symbol in the symbol string is large enough that it cannot be seen at least with the naked eye when the packaging film is in close contact with the surface of the packaged item.

10. The packaged item is a container having a container body closed by a lid portion, The packaging film is formed in close contact with at least the lid portion.

10. The packaging body according to claim 8 or 9.

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