JP6960077B2 - Perforated film packaging for opening - Google Patents

Description

The present invention relates to a perforated film package for opening, particularly a film package having perforations with improved openability.

Conventionally, in a bag or box made of materials such as film or paper, a laminated body in which household thin paper (tissue paper or toilet paper), paper towels, kitchen paper, various wipers, etc. are alternately folded is stored, and the contents are stored. When using the laminate, the required amount is appropriately pulled out from the opening and used. For packaging made from a film or the like that wraps and protects the laminate, which is the content, forms such as pillow packaging, gusseted gusset packaging, and combined packaging (caramel packaging) are generally used. The opening is often perforated so that it can be easily opened.

When taking out the contents from such a package, once the opening of the perforation is broken, then one set is taken out, but when the perforation is broken, the perforation strength is strong and it is difficult to open or the opening is performed. A part of the contents may be destroyed by applying a strong force to the sewing machine. In addition, when the perforations are broken with a strong force, the parts other than the perforations are broken and unnecessarily cleaved, resulting in insufficient protection of the contents and deterioration of the appearance. There are problems such as a lot of contents coming out of the package. Further, with perforations that are easy to open, there is a high risk that the perforations will break due to a slight impact during transportation or storage, resulting in a problem of lowering the commercial value.

Japanese Unexamined Patent Publication No. 2008-183034 Japanese Unexamined Patent Publication No. 2016-188092

The present invention has been made in consideration of problems at the time of opening a film package having perforations for opening, and is not easily opened at the time of transportation or storage, and the contents need to be taken out. Further, it is an object of the present invention to provide a film package having perforations for opening, which can be easily opened with perforations for opening and whose portion other than the perforations is difficult to be torn.

In order to solve the above problems, the present invention can be achieved by the following contents.

(1) 60 mm or more in a film package which is a sheet laminate of sanitary paper from which the contents of a film package packaged with a flexible film base material having a thickness of 20 μm to 80 μm can be taken out one set at a time. Central section perforations and end section perforations in the opening perforation row of any of the opening perforation rows having at least one opening perforation row connected to one row within 250 mm. The ratio of the tie part and the cut part of the eye is in the range shown by the following formula.
2 ≦ ((Central section cut length / (Central section cut length + Central section tie section length))-(End section cut length / (End section cut length + End section tie) Section length)))) × 100

(2) The flexible film base material of the above (1) is mainly composed of any one of a polyethylene resin, a polypropylene resin, and a polyethylene terephthalate resin.

(3) The contents of the film wrapping body of the above (1) are a sheet laminate of sanitary paper that can be taken out one set at a time in a pop-up manner, and the sanitary paper is tissue paper, toilet paper, paper towel, kitchen paper, various wipers, etc. Is selected from.

According to the present invention, the contents cannot be easily opened during transportation or storage, and when the contents need to be taken out, the contents can be easily opened with the opening perforation without the parts other than the perforations being easily torn. It is possible to provide a perforated film package for opening in which an object can be stably taken out.

Perforated film packaging for opening 1 Perforated film packaging for opening 2 Enlarged view of perforations for opening The shape of the sheet taken out from the film package Cross-sectional view of the film package of FIG. 1 in the direction perpendicular to the perforation.

Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be specifically described with reference to the drawings.

The first embodiment of the perforated film package for opening according to the present invention will be specifically described with reference to FIGS. 1 and 3 to 5. FIG. 1 shows an example of combined wrapping (caramel wrapping). The perforated film package 1 for opening shown in FIG. 1 is wrapped in a flexible film, and the contents are taken out. Temporarily bound perforations are provided for the mouth, and both ends are folded and closed. In FIG. 1, the number of perforations 2 for opening is one, but it can be provided on the opposite surface (bottom surface) or the side surface if necessary. The perforated portion 3 in the central portion section is the opening start portion and is generally approximately the central portion of the perforated row 2 for opening. If the take-out direction of the package is constant and it is practically preferable to shift the opening from the center, it is possible to shift from the center of the perforation. In this case, it is preferable to move the display such as the opening opening as well. The end section perforations 4 and 5 are sections including one end of the perforation row, respectively, and the ratio of the cut portion and the tie portion is changed as compared with the central section perforation (compared to the central section). Since the ratio of the cut portion is low), it is easy to open at the start of opening, and since the perforations in the end section are hard to break, the parts other than the perforations are hard to break and troubles at the time of opening are hard to occur.

FIG. 3 shows an enlarged view of the perforations, in which the black line portion of the broken line is the cut portion 7 and the blank portion is the tie portion 8. For the cut portion ratio of the perforation (hereinafter referred to as the cut portion ratio), the average value of the cut portion and the tie portion of a specific section of the perforation is measured, and the average value of the cut portion is used as the average value of the cut portion and the average value of the tie portion is used as the average value of the cut portion. It is indicated by the value divided by the added value.

FIG. 4 is a view in which the perforations for opening are opened and the sanitary paper is taken out. FIG. 5 is a cross-sectional view in a direction perpendicular to the perforation direction of FIG. 4, and one set of sanitary paper is inside the package. It shows the state of being enclosed in a superposed form so that they can be taken out one by one in a pop-up manner. If it is not necessary to make a pop-up type such as a pocket tissue, sanitary paper may be simply stacked and enclosed.

To briefly explain the manufacturing method of the pop-up type laminate, the tissue paper contained in a carton box or the like is generally cut into a rectangle and folded in half, and the sheets are folded in an alternately facing manner. On the opening side of the seat, about half of the rear part of the front sheet and about half of the front part of the rear sheet are contained and held. In multi-folder production, the required number of sheet rolls cut to a predetermined width are lined up, and they are sent in the flow direction of the sheet to form a continuous laminated body that is folded in an alternating state. Will be done. A pop-up type laminate can be made by cutting this into a predetermined length. Further, a pop-up type laminate can also be produced by using an interfolder type processing machine for producing a pop-up type laminate by alternately cutting and folding the sheets supplied from the two rolls. In addition, a compact laminate such as a pocket tissue, which is not a pop-up type, can be made by using a processing machine that cuts and stacks sheets while folding them.

As the film base material constituting the package, polyethylene (PE) resin, polypropylene (PP) resin, polyethylene terephthalate (PET) resin and the like are suitable, but they are flexible and suitable for storage and protection of the packaged object. Any resin film can be used. If necessary, these films may be laminated, or modified by resin coating on the surface, metal vapor deposition, or the like. Further, a pigment such as calcium carbonate may be added to the resin in order to enhance the concealing property of the contents, and the concealing property may be enhanced by printing or the visibility may be enhanced.

The thickness of the flexible film used for the packaging (measured by JIS P 8118: 2014) is preferably in the range of 20 μm to 80 μm. If it is less than 20 μm, the film strength is generally low, and troubles such as breakage and perforation are likely to occur during perforation processing and heat fusion processing. Further, if it exceeds 80 μm, the film cost becomes high and it is not practical. In addition, the merit of flexibility when the film is used disappears due to the decrease in flexibility, and the processing defect due to the decrease in thermal conductivity at the time of heat fusion, etc. Is prone to problems and is not practical. When the internal laminate (sanitary paper sheet) is sequentially taken out from the package, the bulk of the laminate becomes low. The height of the opened part is lowered and deformed accordingly, so that the ease of taking out can be maintained, and there are merits such as the sheet not falling into the package during taking out. It is not preferable because it becomes a factor that inhibits those characteristics.

The sanitary paper of the present invention refers to household thin paper (tissue paper or toilet paper), paper towels, kitchen paper, various wipers, etc., and wood pulp is generally used as a raw material for these, but various vegetable fibers and used paper. Sheets such as pulp, sheets obtained by mixing various types of pulp and synthetic fibers, and non-woven fabrics can be used, and if necessary, these sheets are used by stacking a large number of sheets (many plies) or embossing them. As these sheets, sheets in which about 2 to 4 sheets are stacked are often used, but the number is not particularly limited to 4 sheets or less.

The general dimensions of the sanitary paper that composes the laminate are that it is used for manual removal, wiping, wrapping, etc., so its size is about 60 mm to 250 mm on a side without folding. In many cases. Therefore, the length of the opening perforation is preferably in the range of 60 mm to 250 mm. If the length of the opening perforation is longer than the width when the sheet is taken out from the opening, problems such as multiple sets of sheets at once and the front part of the next sheet not coming out of the package are likely to occur. Become. On the other hand, if it is narrow, problems such as the sheet not being easily taken out or being broken in the middle are likely to occur.

The central section in the opening perforation row is preferably in the range of about 20 mm to 100 mm, and the end section is preferably in the range of about 20 mm to 120 mm from both ends, and the length between both ends of the opening perforation and the film. It is preferable to select the length of the central section and the end section according to the material, thickness, and the like. If the film itself has a strong tensile strength, it is better to widen the central section to 30 mm or more.

As a method of making perforations for opening the film, there are a method of making a perforation by applying a metal perforation blade and a method of locally heating the film using a high-power light source such as a laser beam to make a cut portion. .. When laser light is used, it is possible to easily make a complete cut portion or a thinned portion of the film by changing the amount of heat applied to the film by adjusting the output. In this method, the film may not have a cut portion. In the case of such a perforation making method using laser light or the like, a pseudo perforation is formed by using a portion where the film is heated and thinned as a pseudo cut portion and an unheated portion as a tie portion. Is good.

The cut portion ratio (%) of the perforation in the central section and the perforation in the end section of the opening perforation according to claim 1 is expressed by the following equation.
Central section perforation cut ratio (Cm) = Central section perforation cut length / (Central section perforation cut length + end section perforation cut length) x 100, end section perforation cut Ratio (Ce) = Central section perforated cut length / (Central section perforated cut length + End section perforated cut length) x 100, in the present invention, Central section perforated cut ratio (Cm) ) Mind the end section perforation cut ratio (Ce) is 2 points or more, the perforation is good to open, and if it is 5 points or more, it is very easy to open and at the end. It is suitable because the abnormal film tear does not occur. When measuring the length of the cut portion or tie portion of the perforation, it is preferable to remove the perforation at the end end from the measurement because the length may be unstable.

The length of the tie portion of the opening perforation is preferably 0.3 mm or more and 3 mm or less. If it is less than 0.3 mm, the perforations are easily cleaved, and if it exceeds 5 mm, it becomes difficult to open and the perforations do not function. The length of the cut portion of the opening perforation is preferably 1 mm or more and 10 mm or less. If it is less than 1 mm, stable machining cannot be performed in perforation machining using a perforation blade, laser light, or the like, and problems are likely to occur. Further, if it exceeds 10 mm, the film is easily broken, which is not suitable for transportation and storage, and also causes a problem that foreign matter such as dust easily enters during storage due to the large perforated opening.

FIG. 2 which is the second embodiment is an example of the pillow packaging form. Pillow packaging is often used for pocket tissues and the like, and since it is necessary to make it compact in this form, the perforations to be put in the packaging body are short. Therefore, the perforation length is generally about 100 mm or less. When the length of the perforation is about 100 mm or less, the range of the perforation in the central section for easy opening is preferably about 40 mm or less. When the thickness of the laminate to be packaged increases, it is preferable to use a gusset with a gusset. In this case, the perforations for opening are appropriately applied to the perforations for combined wrapping and pillow packaging. It is possible.

As shown in Tables 1 to 4 below, the packaging form, film material, and film thickness are changed as the film package, and the central section perforation specification and the end section perforation specification (the perforation specifications at both ends are the same) are changed. A modified packaging was prepared and evaluated. In the perforation of the combined wrapping package, the perforation in the central section is the average value of each of the tie portion and the cut portion having a width of 30 mm in the center of the perforation row, and the perforation in the end section is the tie portion having a width of 30 mm from the end of the perforation. , The average value of each cut part is shown in the table. In the perforations of the pillow package, the perforations in the central section are the average values of the tie portion and the cut portion having a width of 20 mm in the center of the perforation row, and the perforations in the end section are ties having a width of 20 mm from the end of the perforation. The average value of each part and cut part is shown in the table. In addition, the first perforations that extend beyond each width are included in the average value.

The cut portion ratio is calculated by the average value of the perforated cut portion length / (average value of the perforated cut portion length + the average value of the perforated tie portion length) × 100 (%), and the difference in the cut portion ratio is the central section cut portion. It is expressed as a numerical value (point) obtained by subtracting the end section cut portion ratio Ce (%) from the ratio Cm (%).

For the evaluation of perforation cutability, 10 packages were opened for each specification, and the ease of opening each package and the presence or absence of abnormalities after opening (perforation opening abnormalities) were evaluated on a 4-point scale (3 to 0), and the average value. Asked. 3 is in a good condition and can be opened without any problem (the film has no tear in the part other than the perforation or the tear is within 2 mm), and 2 is not a problem in use but is a little difficult to open or partially tears (the film is a sewing machine). There is a part other than the eyes with a tear of 2 mm or more and less than 5 mm), 1 is a part that is difficult to open or is too open (the film is a part other than the perforation with a tear of 5 mm or more and less than 10 mm), 0 is The evaluation was based on this criterion, in which abnormalities such as the unsealing cannot be easily opened or the sanitary paper squeezed out during use due to excessive tearing. Based on the average value, evaluation 3 is 2.5 or more, evaluation 2 is less than 2.5, 1.5 or more, evaluation 1 is less than 1.5, 0.5 or more, and evaluation 0 is less than 0.5. 1 to 4 are described. Comprehensive evaluation is ◎ (good) for both perforation cutability and cleavage abnormality 3, ○ (usable) for perforation cutability and cleavage abnormality 2 or more, △ (poor) for perforation cutability and cleavage abnormality If the number is 2 or more and there is 1 or 0, x (unusable) is 1 or less for both perforation cutability and abnormal cleavage.

As shown in Table 1, in Examples 1 to 12, the film base material was a polyethylene (PE) film, and a film having a thickness changed in the range of 20 to 75 μm was used, and the perforation length was 170 mm. Perforated according to the specifications described, 150 sets of 2-ply tissue paper (size when folded in half 198 mm x 103 mm) are enclosed inside the package, and the package is wrapped together (top size approximately 200 mm x approximately 105 mm). , Height approximately 30 mm). As a result of evaluating these packages by the above-mentioned evaluation method, good or usable results were obtained. These packages have a thickness in the range of 20 μm to 80 μm in which the film is flexible as described in claim 1, and the perforations in the central section and the cut portions in the perforations in the end section. Perforations were made so that the ratio difference was 2 points or more. Furthermore, when the difference in the ratio of the cut portion was 5 points or more, the result that the opening property was very good was observed.

In Examples 13 to 18 of Table 1, 20 μm to 80 μm polypropylene (PP) film was used as the film base material, and the perforations in the central section and the perforations in the end section were prepared according to the specifications in the table. A wrapping body having a combined wrapping specification was obtained in the same manner as in Example 1. As described in claim 1, these packages also have a thickness in the range of 20 μm to 80 μm in which the film is flexible, and the ratio of the perforations in the central section to the perforations in the end section is cut. It was processed so that the difference was 2 points or more. As a result of evaluating these packages by the above-mentioned evaluation method, good or usable results were obtained.

In Examples 19 to 24 of Table 1, a 25 μm to 75 μm polyethylene terephthalate (PET) film was used as a film base material, and perforations in the central section and perforations in the end section were prepared according to the specifications in the table. , A wrapping body having a combined wrapping specification was obtained in the same manner as in Example 1. As described in claim 1, these packages also have a thickness in the range of 20 μm to 80 μm in which the film is flexible, and the ratio of the perforations in the central section to the perforations in the end section is cut. Perforations were made so that the difference was 2 points or more. As a result of evaluating these packages by the above-mentioned evaluation method, good or usable results were obtained.

In Examples 25 to 37 of Table 2, the films (PE, PP, PET) shown in the table are used as the film base material, and the perforations in the central section and the perforations in the end section are specified in the table. As the internal laminate, 10 sets of 100 mm × 75 mm size 2-ply tissue folded into a general pocket tissue state were pillow-wrapped (upper surface size: about 105 mm × about 80 mm, height: about 10 mm). The film was previously perforated so that a 70 mm long perforation row was in the center of the upper surface of the package. As described in claim 1, these packages also have a thickness in the range of 20 μm to 80 μm in which the film is flexible, and the ratio of the perforations in the central section to the perforations in the end section is cut. The difference was also 2 points or more. As a result of evaluating these packages by the above-mentioned evaluation method, good or usable results were obtained.

The maximum value of the example of the cut portion ratio difference between the perforation in the central section and the perforation in the end section is 35.2 points (Example 23), and the present invention is not limited to this maximum value. However, considering the ratio of the tie portion length and the cut portion length of the practical perforation, it is preferably about 40 points or less, and more preferably about 20 points or less.

In Comparative Examples 1 to 14 in Table 3, the tie portion length and the cut portion length were selected from PE, PP, and PET in which the film base material was used in the examples in the form of combined wrapping, and the total length of the perforation sequence was not changed. A film package was obtained by changing the specifications of. If the film thickness is less than 20 μm or more than 80 μm, the overall evaluation shows that the film is defective or unusable. In addition, those with a cut ratio difference of less than 2 points were also found to be defective or unusable in the comprehensive evaluation. With a thin film, the extra tearing at the perforation edge was particularly large, and with a thick film, it was difficult to tear, and it was often the case that a part of the sanitary paper inside was destroyed at the time of tearing.

In Comparative Examples 15 to 25 in Table 4, the tie portion length and the cut portion length were selected from PE, PP, and PET in which the film base material was used in the examples in the form of pillow packaging, and the total length of the perforation row was not changed. A film package was obtained by changing the specifications of. If the film thickness is less than 20 μm or more than 80 μm, the overall evaluation shows that the film is defective or unusable. In addition, those with a cut ratio difference of less than 2 points were also found to be defective or unusable in the comprehensive evaluation. In both the above Examples and Comparative Examples, the perforations were perforated using a metal perforation blade.

As described above, the present invention has been described in the embodiments of specific materials, perforation specifications, etc., but the technical scope of the present invention is not limited to the scope of the above-described examples and embodiments. In addition, although it is mainly suitable for sanitary paper applications, it is a technology that can be applied to many items to be packaged.

By using the film package that wraps the sanitary paper laminate of the present invention, the perforations are opened with an appropriate force and the parts other than the perforations are difficult to tear, so a sanitary paper that is easy to handle and can be stored with peace of mind is provided. can do.

1 Perforated film package for opening 1
2 Perforations for opening 3 Perforations in the central section 4, 5 Perforations in the end sections 6 Perforations for opening Film packaging 2
7 Perforated cut part 8 Perforated tie part 9 Sanitary paper sheet 10 Perforated part after opening

Claims (3)

60 mm or more and 250 mm or less in a film package which is a sheet laminate of sanitary paper from which the contents of a film package packaged with a flexible film substrate having a thickness of 20 μm to 80 μm can be taken out one set at a time. It has at least one opening perforation row connected to one row, and the ratio of the tie portion and the cut portion of the opening perforation row to the central section perforation and the end section perforation in the row is as follows. Central section perforation that is the range indicated by the formula and is the value obtained by dividing the average value of the central section cut section length by the value obtained by adding the central section section tie section length average value to the central section section cut section length average value. A perforated film package for opening, characterized in that the cut portion ratio is 63.6% or more and 95.2% or less.
2 ≦ ((central section cut portion length mean / (central section cut portion length mean + central section tie portion length average value)) - (end section cut portion length mean / (end-ku between cut Average value of part length + average value of end section tie part length)))) × 100 The perforated film package for opening according to claim 1, wherein the flexible film base material according to claim 1 is mainly composed of any one of polyethylene resin, polypropylene resin, and polyethylene terephthalate resin. The content of the film package according to claim 1 is a sheet laminate of sanitary paper that can be taken out one set at a time in a pop-up manner, and the sanitary paper is selected from tissue paper, toilet paper, paper towel, kitchen paper, and various wipers. The perforated film package for opening according to claim 1, wherein the film package is characterized by the above.

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