JP3819781B2 - Heat-shrinkable film and film package thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat-shrinkable film and a film package in which a container is shrink-wrapped with a heat-shrinkable film.
[0002]
[Prior art]
Conventionally, heat-shrinkable films have been widely used for containers containing chemical solutions because they can be packaged while maintaining high adhesion to containers having complicated shapes. And when packaging a container using the above film, the film is wound around the peripheral side surface of the container, and a cylindrical film having a joint portion is formed by overlapping the left and right ends of the film. Generally, the peripheral side surface of the container is shrink-wrapped by applying heat shrinkage.
[0003]
The shrink packaging described above is required to have a role of protecting the package body and a role of ensuring sealing of the stopper, that is, virgin sealability. For this reason, as shown in FIG. 9, the film satisfying such a requirement is provided with a horizontal perforation for opening the film across the left and right ends at a position to be mounted slightly below the stopper of the container. What has been used is conventionally used (Japanese Utility Model Publication No. 4-63483).
[0004]
And when opening such a film packaging body, hold | maintain the trunk | drum peripheral side surface of a container with one hand, twist the stopper part of a container with the other hand, and remove a stopper part from a container, breaking a perforation. However, when such a film opening operation is performed, there are the following problems.
[0005]
That is, for containers for storing chemicals, in consideration of convenience when performing eye drops etc., a flexible container made of a synthetic resin is often used. For example, a perforation for opening a film is properly used. If the perforation is not easily broken and the film part is slippery, etc., the stopper part is removed from the container by twisting the stopper part of the container in order to hold the container while pressing it strongly. Occasionally, a so-called “liquid sag” occurs in which the chemical contained in the container partially jumps out of the container.
[0006]
In addition, since the above film is only cut off at the upper and lower perforations even after opening along the horizontal perforations, it is possible to determine whether the film is an unopened film package. It was difficult to attach, and there were not a few problems in terms of ensuring the so-called virgin sealing performance.
[0007]
Furthermore, when a container containing a chemical solution is used as a package, the film portion such as a product display given as a print is firmly attached to the container from the start to the end of use of the container, and the use of the container is ended. Later, it is also necessary to make it possible to separate and collect the container and the film part easily.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and its main purpose is to comfortably open the heat-shrinkable film attached to the container, and the upper part of the film attached to the stopper portion of the container after opening. The lower part of the film, on which only the product is removed and attached to the body of the container, on which product indications are printed, is to provide a heat-shrinkable film that can be attached until the use of the container is completed and its film package. .
[0009]
[Means for Solving the Problems]
The heat-shrinkable film of the present invention or the film package thereof is a heat-shrinkable film that is mounted by winding a film around the peripheral side surface of a container composed of a stopper part and a body part, and forming a joint part by overlapping the left and right ends of the film. Alternatively, in the film package, the film is provided with a perforation extending in the horizontal direction across the left and right ends at a position where the film is mounted slightly below the stopper of the container, and is disposed on the outer peripheral side of the joint. Either one of the two ends is provided with a film opening knob portion having a predetermined width, with the perforation position being the base lower part and the upper part of the perforation being the base upper part, and the tip thereof is below the perforation. extending, in the film the lower rear surface at below the perforations of the film, the adhesive layer except for the tip of the knob portion is provided, the film under through the adhesive layer Film There Rutotomoni bonded to the body portion peripheral surface of the container without being heat-shrinkable, of the knob portion, the tip is attached to the barrel portion peripheral surface of the container without being heat-shrinkable, then above the perforations The upper part is mounted on the peripheral side surface of the stopper part of the container by heat shrinkage.
[0010]
According to such a heat-shrinkable film and film packaging body, since the tip of the knob portion extending below the perforation in the horizontal direction among the knob portions is not heated during shrink wrapping, Is attached to the container in a state where the size, shape and width are maintained. For this reason, since the front-end | tip of a knob part protrudes a little outside the cylinder of a container, it is easy to pick by hand and can perform opening operation comfortably.
[0011]
Moreover, it is preferable that the said film is provided with the perforation of a diagonal direction from the base upper part of the knob part provided in either one of the right-and-left both ends to the upper end of a film. Thereby, the opening property of the film upper part above the perforation provided in the film can further be improved.
In addition to the above-described configuration, the film has a perforation having a predetermined length starting from the base of the knob portion provided on either one of the left and right ends, and the perforation in the lateral direction. More preferably, an oblique perforation is provided from the end point to the upper end of the film.
[0012]
In the present invention, when the perforation in the oblique direction is assumed to be a straight line from the start point to the end point of the perforation, a plurality of cuts are preferably arranged so as to cross the straight line. Accordingly, the upper part of the film can be easily opened from the oblique lower end portion to the upper oblique end portion of the perforation, and the fracture surface after opening is not in a straight line, so that high virgin sealing performance is ensured.
[0013]
Moreover, it is preferable that an adhesive layer is provided in the edge part of the back surface of said film toward upper direction from the root upper part of the knob part provided in either one of the right and left both ends. By providing this adhesive layer, it is possible to further improve the openability of the upper perforation provided in the film.
Moreover, it is preferable that a printing layer is provided in any one of the surface or the back surface of said film. Thereby, the heat-shrinkable film of the present invention can be used as a packaging film with a label function that has not only a role as a packaging film that simply protects a container that is a packaged body but also an information transmission function.
Moreover, it is preferable that the said film is provided with the mark which shows an opening direction on the surface of the knob part provided in either one of the right-and-left both ends. Thereby, the user can recognize the opening direction of a film immediately.
[0014]
Further, the film preferably has a shrinkage ratio at 100 ° C. in the longitudinal direction of 45% or more and a stretch ratio at 100 ° C. in the transverse direction of 10% or less. By using a film having such a shrinkage ratio and expansion / contraction ratio, generation of wrinkles of the film can be eliminated at the time of container packaging, so that a film packaging body having a good appearance can be obtained.
Moreover, the film packaging body of this invention is comprised by mounting | wearing the surrounding side surface of the container which consists of a said plug part and a trunk | drum with said heat shrink film. As such a container, a container having flexibility using a synthetic resin as a raw material is particularly preferable.
Moreover, it is preferable that the said container is a container in which the chemical | medical solution chosen from eyedrops, ear drops, and nasal drops was accommodated.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view showing an embodiment of the film package of the present invention. FIG. 2 shows an example of the heat-shrinkable film of the present invention (hereinafter simply referred to as “film”) used in the film package, (a) is a front view showing the film, and (b). FIG. 2 is an external perspective view showing a cylindrical film constituted by using this film.
[0016]
The film package A shown in FIG. 1 (hereinafter referred to as “packaging A”) is formed by winding the film 11 around a peripheral surface of a container 21 composed of a stopper part 22 and a body part 23 and overlapping the left and right ends thereof. A cylindrical film 31 having a joining portion 32 is formed, and then the film upper portion 12 corresponding to the stopper portion 22 of the container 21 is basically shrink-wrapped by heat shrinkage.
[0017]
In the present invention, when the film upper portion 12 is partially subjected to heat shrinkage, for example, a known method such as putting the film upper portion into a shrink tunnel at about 100 ° C. or using a shrink gun can be employed. Moreover, in this invention, the container 21 used as the object of a to-be-packaged body is not specifically limited, The container in which medicinal liquids, such as eyedrops, ear drops, and nasal drops, were accommodated is used preferably. Moreover, as a structural member of the container 21, if it has the stopper part 22 and the trunk | drum 23 fundamentally, it will not specifically limit. In addition, the raw material of the container 21 is not particularly limited, and either resin or glass can be used. In the present invention, general-purpose synthetic resins such as polyvinyl chloride, polyethylene, polypropylene, and ABS resin are used. Those having flexibility, hygiene, safety, etc. are preferably used.
[0018]
The film 11 is preferably a uniaxially stretched flat film having a thickness of about 20 to 200 μm. Further, the raw material is not particularly limited as long as it is a thermoplastic resin that can be formed into a film, and examples thereof include polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate copolymer, polystyrene, polyester, and the like. .
[0019]
Moreover, 45% or more is preferable as a shrinkage | contraction rate in 100 degreeC of the vertical direction of the film 11, and 55% or more is still more preferable. Further, the expansion / contraction rate at 100 ° C. in the lateral direction is preferably 10% or less, more preferably 5% or less, and particularly preferably 2% or less. If the shrinkage in the vertical direction is less than 45%, the film 11 is easily wrinkled when shrink-wrapped. Moreover, when the expansion / contraction ratio in the horizontal direction exceeds 10%, the possibility that the display of the print layer, which will be described later, is contracted and deformed increases.
[0020]
Further, when the film 11 is shrink-wrapped, lateral perforations 14 are provided across the left and right ends at a position slightly below the stopper portion 22 of the container 21, that is, at an upper portion of the body portion 23 of the container. It is preferable. The perforation 14 has a plurality of cuts formed in a line along the lateral direction, and facilitates removal of the film upper portion 12 mounted on the stopper portion 22 of the container 21 above the perforation 14. Therefore, it has a role as a break guide line.
[0021]
Specifically, in the case of shrink wrapping using the container 21 shown in FIG. 1, the upper portion of the trunk portion 23 and at a height position slightly below the shoulder portion, the lateral direction is set. A perforation 14 is preferably provided. This is because the film lower portion 13 constituting the lower region of the perforation in the horizontal direction is usually subjected to printing such as product display described later, and therefore there is a request to secure a printing area as wide as possible, while the other body portion This is because if the perforation 14 is provided above the shoulder portion 23, wrinkles are formed in the perforation and the appearance of the package A itself is deteriorated.
[0022]
Moreover, it is preferable to provide the adhesive layer 17 by applying an adhesive on the back surface of the film 11 and on the film lower portion 13 below the perforation 14 in the lateral direction. In this invention, the area | region which provides the adhesive bond layer 17 is not specifically limited, You may provide the adhesive bond layer 17 over the whole back surface of the film lower part 13, and when considering the production stability of the package A, FIG. As shown in FIG. 4, it is preferable to provide an adhesive layer on three sides of the left and right edges and the upper edge of the back surface of the film lower portion 13. This is because, in the process of attaching the film 11 to the container 21, it is necessary to continuously peel the long release paper adhered to the film 11 at a constant rate at a constant speed. This is because the larger the area, the more difficult it is to release the film 11, and therefore it is necessary to reduce the amount of adhesive used within a range that does not impede practical use. In the present invention, a pressure sensitive adhesive, a heat sensitive adhesive, or the like can be used as the adhesive.
[0023]
Moreover, it is preferable that the printing layer 18 is provided on either the front surface or the back surface of the film 11. The printed layer 18 is printed with product display, environmental labels, and the like. In the present invention, since the film upper part 12 is removed when the package A is used, it is preferable that the printed layer on which the necessary display or the like is applied is disposed at least on the film lower part 13 below the perforation 14. In this embodiment, a printing layer 18 is provided below the perforation 14 on the back surface of the film 11 (see FIG. 3). By providing such a printed layer, the film of the present invention not only serves as a packaging film that simply protects a container that is a packaged body, but also serves as a packaging film with a label function having an information transmission function. It will have.
[0024]
Moreover, it is preferable to provide a film opening knob 15 at the right end of the film 11 at a height position where the film 11 is joined to the lateral perforation 14 described above. Specifically, as shown in FIG. 2, the knob portion 15 has a base bottom portion 15 b at the same height as the perforation 14, a base portion 15 a above the base portion 15 b, and a tip 15 c below the perforation portion 14. It is preferable to be configured to extend. With this configuration, when the tubular film 31 is opened by grasping the knob portion 15, only the upper film portion 12 above the perforation 14 can be removed. In the present invention, as shown in FIG. 1 or FIG. 2, a mark 71 indicating the opening direction can be provided on the surface of the knob portion 15. Thereby, the user can recognize the opening direction of the film upper part 12 immediately.
[0025]
In the present invention, the position of the knob portion 15 is not necessarily limited to the right end of the film 11 as shown in FIG. 2A, and is arranged on the outer peripheral side of the joint portion 32 when the cylindrical film 31 is formed. Any one of the left and right ends may be used. Further, the shape, size, and width of the knob portion 15 are not particularly limited, and the shape, size, and width that can be picked by hand can be appropriately designed. Further, the position of the base upper portion 15a of the knob portion 15 is such that when the knob portion 15 is picked and the film upper portion 12 is opened along the perforation 14, the knob portion 15 does not break during the opening. What is necessary is just to provide above the perforation 14.
[0026]
As described above, in the present invention, shrink wrapping is performed only on the portion corresponding to the plug portion 22 of the container 21, and the tip 15 c of the knob portion 15 extends below the lateral perforation 14. For this reason, the portion below the horizontal perforation 14 in the knob portion 15 is not heated during shrink wrapping, so it is attached to the container 21 in a state in which the size, shape, and width before packaging are maintained. Is done. The package A manufactured in this way has the knob portion 15 protruding slightly outside the cylinder of the container 21, so that it can be easily picked by hand and can be opened comfortably.
[0027]
Moreover, since the base part (15b) of the knob part 15 is located in the same height as the perforation 14, and the base part (15a) is located above the perforation 14, it is attached to the package A. When the cylindrical film 31 is opened along the perforation 14, only the film upper part 12 attached to the stopper part 22 of the container 21 is removed, and the film lower part 13 attached to the trunk part 23 of the container 21 is It is mounted until the use of the container is finished. As a result, when the film 11 having the above-described printing layer 18 provided on the lower film portion 13 is used, the package A can be used in a state where the printing layer 18 is mounted on the container 21, so that printing can be performed even during use. The label function of layer 18 can be maintained. Further, after the use of the package A, the container 21 and the film lower portion 13 can be easily separated and collected.
[0028]
In addition, after manufacturing the package A, it is necessary to pick the plug portion 22 of the container 21 by a machine and apply it to a subsequent process. However, the knob portion 15 of the package A of the present invention is located below the plug portion 22. Therefore, there is also an advantage that the operation can be smoothly performed without hindering the picking operation.
[0029]
Further, since the package A is provided with the horizontal perforation 14 and the knob portion 15 at the height position described above, the upper surface of the stopper portion 22 of the container 21 with one hand when the film upper portion 12 is opened. And the lower surface of the body portion 23 and the grip portion 15 with the other hand, and the posture of opening along the perforation 14 in the lateral direction is easily guided. For this reason, as described above, since a strong force is not applied to the circumferential surface of the body portion 23 of the container 21 during opening, there is no fear of so-called liquid dripping as compared with the conventional film package.
[0030]
FIG. 4 is an external perspective view showing a second embodiment of the film package according to the present invention. FIG. 5 is a front view showing a second embodiment of the film of the present invention used for this film package. The film 41 used for the film packaging body B is provided with a perforation 16 in an oblique direction from the base upper portion 15a of the knob portion 15 to the upper end 41a of the film 41 in addition to the components of the film 11 described above.
[0031]
This perforation 16 has a plurality of incisions 61 arranged in an oblique direction from the base upper portion 15a to the film upper end 41a, and in order to further facilitate the removal of the film upper portion 12 together with the lateral perforations 14 described above. It has a role as a break guide line. As this perforation 16, the cut | notch 61 can be arrange | positioned along the straight line from the base upper part 15a to the film upper end 41a. In addition, when a straight line from the root upper part 15a to the film upper end 41a is assumed, a plurality of cuts 61 can be arranged so as to cross the straight line.
[0032]
In this way, when the cut 61 is arranged so as to cross the virtual line, the perforation 16 is formed with a zigzag pattern or a diagonal line pattern as a whole. FIG. 5 shows an example of a perforated line 16 with a diagonal line pattern. When a straight line extending from the base upper part 15a to the film upper end 41a is assumed, the cut 61 is arranged slightly obliquely from this straight line. It is. By disposing the cuts 61 in this way, it is easier to open along the oblique perforations 16 than when straight perforations are provided. Moreover, since the broken surface after opening forms a lightning-like zigsag line, the virgin sealability can be more strongly ensured as compared with the conventional film package.
In the present invention, the position of the upper end 41a serving as the end portion of the oblique perforation 16 is not particularly limited as long as the opening in the oblique direction is not hindered, and may be appropriately determined depending on the size of the container 21 to be packaged. Can change.
[0033]
FIG. 6 is an external perspective view showing a third embodiment of the film package according to the present invention. Moreover, FIG. 7 is a front view which shows the 3rd Example of the film of this invention used for this film packaging body. The film 51 used for the film package C includes, in addition to the components of the film 11 of the first embodiment, a horizontal perforation 19 having a predetermined length starting from the root upper portion 15a of the knob portion 15 and the horizontal perforations 19 thereof. A straight diagonal perforation 16 as a whole is provided from the end point of the direction perforation 19 to the upper end 51a of the film.
[0034]
The lateral perforations 19 have a role as a break guide line for further facilitating the removal of the film upper portion 12 along the oblique perforations 16. In order to appropriately exert this role, it is preferable that the perforation 19 is provided in parallel with the lateral perforation 14 located below the perforation 19, and it is sufficient if the length thereof can appropriately guide the initial opening. There is no need to make it extremely long.
[0035]
In the present embodiment, the adhesive layer 20 may be provided on the edge of the back surface of the film 51 upward from the base 15a of the knob portion 15 (see FIG. 8). By providing the adhesive layer 20, the upper and lower film right end edges of the knob portion 15 can be opened with the knob portion 15 attached to the container 21. In the initial stage, the horizontal perforations 14 and 19 are easily opened along the perforations.
[0036]
【The invention's effect】
As described above, according to the heat shrinkable film and the package of the present invention, the shrink film attached to the container can be opened comfortably, and only the upper part of the film attached to the stopper portion of the container after opening is removed. The lower part of the film on which the product display etc. is printed, which is mounted on the body of the container, can be mounted until the use of the container is finished, and the virgin sealing performance is ensured to be high.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing a first embodiment of a film package.
FIG. 2 shows an example of a film used in the film package of FIG. 1, (a) is a front view showing the film, and (b) is an external view showing a cylindrical film formed using the film. It is a perspective view.
FIG. 3 is a rear view of the film of FIG.
FIG. 4 is an external perspective view showing a second embodiment of the film package.
5 is a front view showing a second embodiment of a film used in the film package of FIG. 4. FIG.
FIG. 6 is an external perspective view showing a third embodiment of the film package.
7 is a front view showing a third embodiment of a film used in the film package of FIG. 6. FIG.
FIG. 8 is a back view of the film of FIG.
FIGS. 9A and 9B show a film packaging body conventionally used, wherein FIG. 9A is a front view showing the film, FIG. 9B is a cross-sectional view thereof, and FIG. 9C is a cross-sectional view of the film packaging body.
[Explanation of symbols]
A, B, C Film packaging 11, 41, 51 Film 12 Film upper part 13 Film lower part 14 Horizontal perforation 15 Knob part 15a Base upper part 15b Base lower part 15c Tip part 16 Diagonal perforation 17 Adhesive layer 18 Print layer 19 Perforation 20 in horizontal direction Adhesive layer 21 Container 22 Plug part 23 Body part 31 Cylindrical film 32 Joint part 41a, 51a Film upper end 61 Notch 71 Mark

Claims (18)

In a heat-shrinkable film that is mounted by winding a film around the peripheral side surface of a container consisting of a stopper part and a trunk part, and forming a joint part by overlapping the left and right ends of this film,
The film is provided with a perforation in the horizontal direction across the left and right ends at a position attached slightly below the stopper of the container,
Either one of the left and right ends arranged on the outer peripheral side of the joint portion is provided with a film opening knob portion having a predetermined width with the perforation position as a base lower portion and the perforation upper portion as a base upper portion. And its tip extends below the perforation,
The lower part of the film below the perforation on the back side of the film is provided with an adhesive layer except for the tip of the knob part ,
Said through an adhesive layer film bottom is adhered to the body portion peripheral surface of the container without being heat shrinkable Rutotomoni, of the knob portion, attached to the barrel portion peripheral surface of the container its tip without being heat shrinkable And
Next, the heat shrink film in which the upper part of the film above the perforation is attached to the peripheral side surface of the stopper portion of the container by heat shrink. The heat-shrinkable film according to claim 1, wherein a perforation in an oblique direction is provided from an upper part of a base of a knob part provided on either one of left and right ends of the film to an upper end of the film. A horizontal perforation of a predetermined length starting from the top of the base of the knob provided on either the left or right end of the film, and an oblique direction from the end of this horizontal perforation to the top of the film The heat shrinkable film according to claim 1, wherein the perforation is provided. The heat-shrinkable film according to claim 2 or 3, wherein the oblique perforation has a plurality of cuts arranged so as to cross the straight line when assuming a straight line from the start point to the end point of the perforation. . The adhesive layer is provided in the edge part of the back surface toward the upper part from the base upper part of the knob part provided in either one of the right and left both ends of a film in any one of Claims 1-4. The heat-shrink film as described. The heat-shrinkable film according to any one of claims 1 to 5, wherein a printed layer is provided on either the front surface or the back surface of the film. The heat-shrinkable film according to any one of claims 1 to 6, wherein a mark indicating an opening direction is provided on a surface of a knob portion provided on either one of left and right ends of the film. The heat shrinkable film according to any one of claims 1 to 7, wherein a shrinkage rate at 100 ° C in the longitudinal direction is 45% or more, and a stretch rate at 100 ° C in the transverse direction is 10% or less. In a film package that is wound around a peripheral side surface of a container composed of a stopper part and a trunk part, and is attached by forming a joint part by overlapping the left and right ends of the film,
The film is provided with a perforation in the horizontal direction across the left and right ends at a position attached slightly below the stopper of the container,
Either one of the left and right ends arranged on the outer peripheral side of the joint portion is provided with a film opening knob portion having a predetermined width with the perforation position as a base lower portion and the perforation upper portion as a base upper portion. And its tip extends below the perforation,
The lower part of the film below the perforation on the back side of the film is provided with an adhesive layer except for the tip of the knob part ,
Said through an adhesive layer film bottom is adhered to the body portion peripheral surface of the container without being heat shrinkable Rutotomoni, of the knob portion, attached to the barrel portion peripheral surface of the container its tip without being heat shrinkable And
Next, the film packaging body in which the upper part of the film above the perforation is mounted on the peripheral side surface of the stopper part of the container by heat shrinkage. The film packaging body according to claim 9, wherein a perforation in an oblique direction is provided from an upper part of a base of a knob part provided at either one of left and right ends of the film to an upper end of the film. A horizontal perforation of a predetermined length starting from the top of the base of the knob provided on either the left or right end of the film, and an oblique direction from the end of this horizontal perforation to the top of the film The film packaging body according to claim 9 or 10, wherein the perforation is provided. The film package according to claim 10 or 11, wherein the oblique perforation has a plurality of cuts arranged so as to cross the straight line when assuming a straight line from the start point to the end point of the perforation. . The adhesive layer is provided on the edge of the back surface from the upper part of the base of the knob part provided on either one of the left and right ends of the film. The film package of description. The film packaging body according to any one of claims 9 to 13, wherein a printed layer is provided on either the front surface or the back surface of the film. The film packaging body in any one of Claim 9 to 14 with which the mark which shows an opening direction is given to the surface of the knob part provided in either one of the right-and-left both ends of a film. The film packaging body according to any one of claims 9 to 15, wherein the shrinkage rate at 100 ° C in the longitudinal direction is 45% or more and the stretch rate at 100 ° C in the transverse direction is 10% or less. The film container according to any one of claims 9 to 16, wherein the container has flexibility using a synthetic resin as a raw material. The film packaging body according to any one of claims 9 to 17, wherein the container contains a drug solution selected from eye drops, ear drops, and nasal drops.

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