JP2020103809A - Packaging sheet, manufacturing method of packaging sheet, and packaged absorbent article - Google Patents

Abstract

To provide a packaging sheet for an absorbent article configured that a sealing tape is hardly detached before opening a packaged absorbent article and that opening work of the sealing tape is easily and reliably performed in opening.SOLUTION: In a packaging sheet for an absorbent article in which an absorbent article is packaged by overlapping a first region including one end in a first direction on the outside of a second region including the other end in the first direction, and a sealing tape is stuck over a first part of the first region and a second part on an outer surface of the second region, and which is made of a resin film, a coloring agent layer is formed over the entire region of the outer surface of the packaging sheet which is exposed while at least the absorbent article is packaged, and an area rate of the coloring agent layer in the first part is lower than an area rate of the coloring agent layer in the second part.SELECTED DRAWING: Figure 4

Description

The present invention relates to a packaging sheet, a method for manufacturing the packaging sheet, and a packaging absorbent article.

BACKGROUND ART Conventionally, absorbent articles such as sanitary napkins, panty liners, and incontinence pads are generally provided in a packaged state by a packaging sheet for hygiene and convenience of transportation. As such a packaged absorbent article (packaged absorbent article), the absorbent article is placed on the inner surface of the packaging sheet, and the packaging sheet is folded together with the absorbent article in a predetermined direction to seal the edges, Those fastened with a stop tape are known (for example, Patent Document 1).

More specifically, in such a packaged absorbent article, the first region including one end in the predetermined direction of the packaging sheet is superposed on the outside of the second region including the other end, and the sealing tape is provided in the first region and the first region. It is in a state of being attached over two areas.

JP, 9-220254, A

In the sealed state, the sealing tape plays a role of fixing the end portion of the first region overlapped on the outer side to the second region. On the other hand, at the time of unsealing, by pulling the sealing tape from the second area side, the sealing tape is peeled from the second area and stuck to only the first area. Therefore, by continuously pulling the sealing tape. The end of the first region can be easily lifted. Thereby, the opening operation of the packaged absorbent article can be performed easily and surely.

By the way, it is known to use a resin film as a packaging sheet in a packaging absorbent article. In recent years, a colorant layer is formed on the outer surface of the packaging sheet by printing or the like to improve the design.

However, when the colorant layer is formed, the adhesiveness of the above-mentioned sealing tape tends to decrease. Therefore, when the sealing tape is strongly peeled off at the time of opening, the sealing tape itself may be detached from the packaging sheet. On the other hand, in order to prevent detachment of the sealing tape, it is conceivable to use a sealing tape having high adhesiveness, but in that case, the sealing tape is difficult to peel off from the second area, and the unsealing work is difficult. May become. In addition, there is a possibility that the packaging sheet may be broken by applying a strong force to the packaging sheet.

In view of the above points, one embodiment of the present invention is a resin-made packaging sheet, in which the sealing tape is unlikely to come off before unsealing, and the unsealing operation of the unsealing tape at the time of unsealing can be performed easily and reliably. An object of the present invention is to provide a packaging sheet for absorbent articles that can be performed.

A first aspect of the present invention can package an absorbent article by stacking a first region including one end in the first direction on the outside of a second region including the other end in the first direction, and the first region A packaging sheet for absorbent articles made of a resinous film, wherein a sealing tape is adhered over the first portion of the outer surface and the second portion of the outer surface of the second region, at least the outer surface of the packaging sheet. The colorant layer is formed over the entire exposed area of the absorbent article in a packaged state, and the area ratio of the colorant layer in the first portion is more than the area ratio of the colorant layer in the second portion. Low.

According to the first aspect, the packaging sheet is a resin film, and the colorant layer is formed on at least the entire area of the outer surface exposed in the packaged state of the absorbent article. As a result, it is possible to draw a design having a good color development and a clear contour, and it is possible to obtain a packaging sheet and a packaging absorbent article with high aesthetics.

And in this aspect, the area ratio of the colorant layer in the portion (first portion) of the outer surface of the first region to which the sealing tape is attached is such that the sealing tape of the outer surface of the second region is attached. Since it is lower than the area ratio of the colorant layer in the portion (second portion), the easiness of peeling of the sealing tape can be made different between the first portion and the second portion. Thereby, when the user peels the sealing tape from the second region side at the time of opening, the sealing tape can be easily peeled from the second region, and can be configured to be difficult to peel from the first region. The opening operation of the sealing tape can be performed more easily and surely. Further, it is possible to prevent the sealing tape from being detached before opening, without increasing the adhesiveness of the sealing tape more than necessary.

In the second aspect of the present invention, the difference between the area ratio of the colorant layer in the second portion and the area ratio of the colorant layer in the first portion is 30% points or more.

According to the second aspect, by forming the colorant layer so that the area ratios of the first portion and the second portion have a predetermined difference, the opening operation of the sealing tape can be performed more easily and reliably. It is possible to further improve the above-described effect of being able to.

In the third aspect of the present invention, at least the first portion and the second portion are roughened before forming the colorant layer.

According to the third aspect, the anchor action, that is, the action of fastening the sealing tape to the packaging sheet more reliably by allowing the adhesive of the sealing tape to enter the fine recesses formed on the outer surface, more reliably. Can be generated.

In a fourth aspect of the present invention, the area ratio of the colorant layer in the portion from the one end to 0.5 to 5 mm in the first direction is 5% or less.

According to the fourth aspect, the area ratio of the colorant layer in the region of the one end in the first direction (the end of the first region) of the packaging sheet is set to be equal to or less than the predetermined value. Can be improved. Therefore, even when the sealing tape is peeled off with a strong force at the time of opening, it is possible to prevent the sealing tape from coming off from the first portion (first region).

In the fifth aspect of the present invention, the peel strength of the sealing tape is uniform.

According to the fifth aspect, a cheaper sealing tape can be selected when configuring the packaged absorbent article, so that the cost of the packaged absorbent article can be reduced.

In the sixth aspect of the present invention, in the second portion, the area ratio of the colorant layer in the second portion is gradually or gradually lower as it approaches the other end.

According to the sixth aspect, since the area ratio of the colorant layer is high at the peeling start position of the sealing tape, the opening operation for peeling the sealing tape can be performed with a smaller force. it can.

In the seventh aspect of the present invention, the absorbent article can be packaged by stacking the first region including one end in the first direction on the outside of the second region including the other end in the first direction, and the first region. Is a method for manufacturing a packaging sheet for absorbent articles made of a resin film, in which a sealing tape is attached over the first portion of the outer surface of the sheet and the second portion of the outer surface of the second region, and at least the resin sheet A roughening step of roughening the outer surface, and a colorant layer forming step of forming a colorant layer over at least the entire exposed area of the outer surface of the roughened sheet when the absorbent article is packaged; In the step of forming the colorant layer, the area ratio of the colorant layer in the first portion is lower than the area ratio of the colorant layer in the second portion.

According to the seventh aspect, it is possible to provide a method for manufacturing a packaging sheet that exhibits the same effects as the first aspect.

An eighth aspect of the present invention includes the packaging sheet according to any one of the first to sixth aspects, and the absorbent article packaged with the packaging sheet.

According to the eighth aspect, it is possible to provide a packaged absorbent article that exhibits the same effects as those of the first to sixth aspects.

According to one aspect of the present invention, in a resin-made packaging sheet, the sealing tape is unlikely to come off before opening, and the opening operation of the sealing tape at the time of opening can be performed easily and reliably. A packaging sheet for absorbent articles can be provided.

It is the figure which looked at the packaging sheet by one form of the present invention from the outside. 1 is a diagram showing a packaged absorbent article according to an aspect of the present invention. It is the II sectional view taken on the line of FIG. It is a figure which shows the formation example of the coloring agent layer in a packaging sheet. It is a figure which shows the formation example of the coloring agent layer in a packaging sheet. It is a figure which shows the formation example of the coloring agent layer in a packaging sheet. It is a figure which shows the formation example of the coloring agent layer in a packaging sheet. It is a figure which shows the formation example of the coloring agent layer in a packaging sheet. It is a figure which shows the formation example of the coloring agent layer in a packaging sheet. It is a figure which shows the formation example of the coloring agent layer in a packaging sheet.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each drawing, the same or corresponding configurations are denoted by the same reference numerals and the description thereof may be omitted unless otherwise specified. Further, the drawings are schematic for helping understanding of the invention.

First, the basic configuration of the packaging sheet 10 for absorbent articles in the present embodiment will be described. FIG. 1 shows one form of a packaging sheet 10 for absorbent articles. FIG. 1 is a view of a state where the absorbent article 1 is placed on the inner surface of the unfolded packaging sheet 10 as seen from the outer surface (the surface opposite to the surface on which the absorbent article 1 is placed). Further, FIG. 2 shows a state after the absorbent article 1 is packaged with the packaging sheet 10 and the sealing tape 50 is attached, that is, a plan view of the packaged absorbent article 100. Further, FIG. 3 shows a cross-sectional view taken along the line II of FIG.

As shown in FIG. 1, the packaging sheet 10 may have a rectangular elongated shape. The first direction D1 in FIG. 1 is the longitudinal direction of the packaging sheet 10, and the direction orthogonal to the first direction D1 is the lateral direction D2. The size of the packaging sheet 10 depends on the size and shape of the absorbent article 1 to be packaged, but for example, the length in the first direction D1 (may be simply referred to as length) may be about 100 to 450 mm, The length (may be referred to as width) in the second direction D2 may be about 70 to 250 mm. The packaging sheet 10 may have substantially the same length and width, and may have a substantially square shape.

The packaging sheet 10 can be a resin film. In the present specification, the resin film refers to a film mainly made of resin. That is, the resin film may be a resin-based film, and may be a film containing only a resin or a component other than the resin, for example, a filler, a modifier, an additive such as a pigment, and the like. You can Further, the resin film may be a single-layer film or may be a laminate of a plurality of resin films. Further, a sheet (for example, woven cloth, non-woven cloth, etc.) that is not a resin film may be laminated in addition to the resin film. In that case, the surface of the resin film is configured to be the outer surface of the packaging sheet.

Examples of the resin used for the resin film include polyolefin such as polypropylene and polyethylene, polyester, polyvinyl alcohol, and the like, and polyethylene is particularly preferably used. The resin film is preferably a stretched film. The resin film may be a non-breathable film or a breathable film.

By using a resin film as the packaging sheet, when the colorant layer is formed on the outer surface, the contour of the colorant layer becomes clear and the color development of the colorant becomes good, so the designability of the packaging sheet is improved. Can be made.

When wrapping an absorbent article with the packaging sheet 10, first, the absorbent article 1 is placed on the inner surface of the unfolded packaging sheet 10 (FIG. 1), and the packaging sheet 10 is wound together with the absorbent article 1 into, for example, three-fold winding. Fold in (tri-fold). That is, in the illustrated example, the packaging sheet 10 is divided into three regions in the first direction D1, and the first region R1 including one end 11 in the first direction D1 of the three regions is at the fold line L1 and Each of the second regions R2 including the other end 12 can be folded along the folding line L2 to the inner surface side as shown in FIG. In that case, the first region R1 is made to overlap the outside of the second region R2. In the illustrated example, both the first region R1 and the second region R2 are shorter in length than the third region R3 which is in the middle of both regions, and the first region R1 is longer than the second region R2. The length is getting shorter. However, the relationship of the lengths of the first region R1, the second region R2, and the third region R3 is not limited to that shown in the figure. For example, the length of the first region R1 is longer than the length of the second region R2. May be.

When packaging an absorbent article having a relatively long length, the packaging sheet 10 can be lengthened according to the length of the absorbent article. More specifically, the length of the second region R2 can be made longer than the length of the third region R3. When folding, the second region R2 can be folded into the inner surface side, and then folded along the fold line L2 and then along the fold line L1 to form a four-fold packaged absorbent article as a whole.

By folding the packaging sheet 10 together with the absorbent article 1, the packaged absorbent article 100 as shown in FIGS. 2 and 3 is obtained. After being folded, the edge portion (end portion in the second direction D2) of the packaging sheet 10 may be sealed by, for example, heat sealing, ultrasonic sealing or the like. As shown in FIGS. 2 and 3, the sealing tape 50 is provided on the outer surface of the packaging sheet 10 over the first region R1 and the second region R2. The surface of the sealing tape 50 facing the packaging sheet 10 is adhesive, and the surface on the opposite side is non-adhesive.

By providing the sealing tape 50, it is possible to keep the first region R1 in the second region R2 while the absorbent article 1 is packaged (sealed state). On the other hand, at the time of opening, the sealing tape 50 can be pulled and peeled from the second region R2 side. The sealing tape 50 may have a non-adhered portion 50a (FIG. 2) that is not adhered to the second region R2 of the packaging sheet 10. When peeling off the sealing tape 50, the user can lift the sealing tape 50 by holding the non-adhesive portion 50a and peel it off from the outer surface of the second region R2. After the sealing tape 50 is peeled off from the outer surface of the second region R2, the sealing tape 50 is attached only to the first region R1. Therefore, by further pulling the sealing tape 50, the sealing tape 50 is sealed. The first region R1 can be lifted together with the tape 50 to develop the packaged absorbent article.

As shown in FIG. 1, a portion to which the sealing tape 50 is attached in the first region R1 is referred to as a first portion (tape fixing portion) 21, and a portion to which the sealing tape 50 is attached in the second region R2. The second portion (tape peeling portion) 22 is used. The first portion 21 and the second portion 22 are formed at the center in the second direction D2. Further, in the illustrated example, the number of the first portion 21 and the number of the second portion 22 are each one, but when the configuration is such that two or more sealing tapes 50 are attached, the first portion 21 and the second portion 21 Each portion 22 can be more than one.

In the illustrated example, the first portion 21 and the second portion 22 are both quadrangular, but the shapes and sizes of the first portion 21 and the second portion are determined according to the shape and size of the sealing tape 50. It is sufficient if it is possible, and there is no particular limitation. Both the first portion 21 and the second portion 22 may have a first-direction D1 length of about 5 to 20 mm, and a second-direction D2 length of about 5 to 20 mm. When the sealing tape 50 has the same width (second direction D2 length), the second direction D2 length of the first portion 21 and the second portion 22 second direction D2 length are the same.

In this embodiment, the colorant layer 18 is formed on the entire outer surface of the packaging sheet 10. The formation of the colorant layer over the entire outer surface means that it is possible for the user to recognize that the design (including the ground pattern) is continuous alone or in combination over the entire outer surface. Therefore, the packaging sheet in the present embodiment includes one in which the colorant layer 18 is formed on the entire outer surface without a gap, and one in which the colorant layer is continuously formed at intervals. It should be noted that the colorant layer is not shown in FIGS. 1 and 2 for the sake of clarity.

The colorant layer 18 can be formed, for example, by applying ink or paint to the surface of the packaging sheet 10. Examples of the ink application method include printing, and more specifically, gravure printing, flexographic printing, inkjet printing, screen printing and the like. By forming the colorant layer, it is possible to draw a pattern on the packaging sheet 10 or to write characters or symbols. The color of the colorant (ink or paint) used in forming the colorant layer does not matter. The color of the colorant includes red, blue, yellow, black, and the like, as well as white.

In the present embodiment, as described later with a specific example, the area ratio of the colorant layer 18 formed in the first portion 21 is lower than the area ratio of the colorant layer formed in the second portion 22. In this specification, the area ratio of the colorant layer 18 (also referred to as the colorant area ratio) refers to the ratio (%) of the area of the region occupied by the applied colorant in the predetermined region.

When the colorant layer is formed in a predetermined area on one side of the packaging sheet 10 by printing the ink, the colorant area ratio is the ratio of the area printed in the predetermined area. In this case, if the predetermined area is not printed at all, the area ratio is 0%, and if it is printed so as to cover the entire predetermined area (if there is no shading or missing on the printing surface, so-called solid printing) The rate is 100%. Further, when the colorant layer is formed by printing using a printing machine, the area ratio can be a halftone dot area ratio. The area ratio may be calculated from the density using, for example, a micro densitometer, or may be calculated from the area of halftone dots in an image captured by a CCD camera or the like. The area ratio can be calculated for the entire area of the first portion 21 or the second portion 22.

The area ratio of the colorant layer 18 in the first portion 21 is preferably 60% or less, more preferably 40% or less, and further preferably 20% or less. The area ratio of the colorant layer 18 in the first portion 21 can be 5% or more, preferably 10% or more. For example, when the colorant layer 18 is continuously formed along the second direction D2, by setting the area ratio of the colorant layer 18 to the above value, the packaging sheet 10 reaches the end in the first direction D1. Since the colorant layer 18 can be extended, the designability can be improved and the contents of the packaged absorbent article (absorbent article) can be made less visible from the outside.

The area ratio of the colorant layer 18 in the second portion 22 is preferably 40% or more, more preferably 60% or more, and further preferably 80% or more.

The difference between the area ratio of the colorant layer in the second portion and the area ratio of the colorant layer in the first portion is preferably 30% points or more, and more preferably 50% points or more.

Although the colorant layer 18 may be provided on the entire outer surface of the packaging sheet 10, it is provided on at least the entire area of the outer surface of the packaging sheet 10 exposed to the outside in the packaged state of the absorbent article 1. Good. Therefore, as shown in FIG. 3 in which the colorant layer 18 is indicated by a thick line, the colorant layer 18 may not be provided in a portion of the second region R2 where the first region R1 is overlapped.

The area ratio of the colorant layer 18 provided at least over the entire region exposed to the outside in the packaged state of the absorbent article 1 can be 5% or more, preferably 10%. As a result, the contents of the packaged absorbent article (packaged absorbent article) can be made invisible from the outside, so that the user can easily carry the packaged absorbent article.

The packaging sheet 10 may be at least the first portion 21 and the second portion 22 to which the sealing tape 50 is attached, or at least the outer surface of which is roughened (having fine irregularities). .. For example, the packaging sheet 10 may be manufactured by a manufacturing method including a process in which fine irregularities are formed on the surface. Alternatively, the resin film may be formed once, and then the resin film may be subjected to surface roughening treatment such as corona treatment.

Hereinafter, an example of the colorant layer 18 formed on the outer surface of the packaging sheet 10 (the surface opposite to the surface on which the absorbent article 1 is placed) will be described.

FIG. 4A shows a plan view of the packaging sheet 10A according to the first example as seen from the outside. Further, FIG. 4B shows a plan view of the packaging sheet 10A folded and viewed from the side where the first region R1 and the second region R2 are overlapped. Although the colorant layer 18A is formed on the entire outer surface of the packaging sheet 10A, the colorant layer 18A is not formed uniformly on the entire outer surface, but is formed with a different area ratio depending on the region or place. There is. That is, as shown in FIGS. 4A and 4B, the packaging sheet 10A has a low area ratio region RAa in which the area ratio of the colorant layer is lower and a high area ratio region in which the area ratio of the colorant layer is higher. RAb. The low area ratio region RAa includes a first portion 21 to which the sealing tape is attached, and the high area ratio region RAb includes a second portion 22 to which the sealing tape is attached. Therefore, the area ratio in the low area ratio region RAa may be the same as the area ratio in the first portion 21, and the area ratio in the high area ratio region RAb may be the same as the area ratio in the second portion 22.

In the illustrated example, the boundary between the low area ratio region RAa and the region RAb is on the third region R3, but the area ratio of the colorant layer in the first portion 21 is the area of the colorant layer in the second portion 22. The position of the boundary between the low area ratio region RAa and the region RAb is not limited to that shown in the figure as long as it is lower than the ratio. Further, although the boundary between the regions is linear, it may be curved or curved (including wavy).

In this way, regions having different area ratios of the colorant layer are formed on the outer surface of the packaging sheet 10 so that the area ratio of the colorant layer in the first portion 21 is smaller than the area ratio of the colorant layer in the second portion 22. By lowering the adhesiveness of the first portion 21 when the sealing tape 50 is attached, the adhesiveness of the second portion 22 can be lowered. Thus, when the user pulls the sealing tape 50 from the second region R2 side to peel it off when opening the package, it does not require an excessively large force and can be easily peeled from the second region R2. Then, even if the sealing tape 50 is subsequently pulled, the state in which the sealing tape 50 is adhered to the first region R1 can be kept good, so that the end portion (one end 11) of the first region R1 is sealed. By lifting together with the tape 50, the packaged absorbent article can be opened easily and surely.

The packaging sheet 10 may have a roughened outer surface as described above. If the outer surface of the sheet is roughened, a so-called anchor action (an action of more reliably retaining the sealing tape 50 on the packaging sheet 10 by allowing the adhesive of the sealing tape 50 to enter the fine recesses formed on the outer surface) ), the adhesiveness of the sealing tape to the packaging sheet 10 can be improved. However, even if such a surface-roughening treatment is performed, when the colorant layer is formed after that, the surface roughness is reduced, the anchoring action is reduced, and the adhesiveness of the sealing tape 50 is reduced. Tend.

On the other hand, according to the present embodiment, by making the area ratio of the colorant layer in the first portion 21 lower than the area ratio of the colorant layer in the second portion 22, the first portion 21 and the second portion 22 can be formed. The adhesiveness can be adjusted in a good balance. Therefore, the sealing tape does not come off before opening, and the opening operation can be easily and surely performed during opening.

Further, in the present embodiment, the adhesiveness to the sealing tape is adjusted between the first portion 21 and the second portion 22 by making the area ratio of the colorant layer in the first portion 21 and the second portion 22 different. .. Therefore, as the sealing tape 50 used in the present embodiment, a general sealing tape having uniform adhesiveness (peel strength) can be used, and it is not necessary to use one having special specifications.

In this example, the colorant layer 18A is formed with a substantially uniform area ratio in each of the low area ratio region RAa and the high area ratio region RAb. However, the area ratio of the colorant layer may be locally increased or decreased in each region. The area ratio of the colorant layer may be gradually or stepwise changed in each region.

Further, the colorant layer 18A is continuously formed when viewed along the second direction D2. In the present specification, that the colorant layer is continuously formed means that the continuity of a predetermined pattern pattern or a ground pattern can be recognized by the user, and the colorant layer is formed in the second direction. It does not matter whether or not there is a break at D2. Such a packaging sheet in which the colorant layer is continuously formed when viewed along the second direction D2 is printed on the wound long resin film with the second direction D2 as the transport direction. By doing so, it can be manufactured. Therefore, many packaging sheets can be obtained in a short time without the need for alignment and the like. In addition, aesthetics are improved by drawing a continuous pattern (including a ground pattern) along the second direction D2.

FIG. 5A shows a plan view of the packaging sheet 10B according to the second example as viewed from the outside. Further, FIG. 5B shows a plan view of the packaging sheet 10B folded and viewed from the side where the first region R1 and the second region R2 are overlapped.

Similar to the packaging sheet 10A (FIGS. 4A and 4B), the coloring agent layer 18B is formed on the outer surface of the packaging sheet 10B, and the area ratio of the coloring agent layer 18B is also the area of the packaging sheet 10B. Depends on However, unlike the packaging sheet 10A (FIGS. 4(a) and 4(b)), the packaging sheet 10B has three regions having different area ratios of the colorant layer, and the low area ratio region has the lowest area ratio. RBa, a medium area ratio region RBb, and a high area ratio region RBc. In this example, the low area ratio region RBa includes the first portion 21 to which the sealing tape is adhered in the first region R1, and the high area ratio region RBc is adhered to the sealing tape in the second region R2. The second portion 22 is included.

In this example, the boundary between the low area ratio region RBa and the middle area ratio region RBb is located on the fold line L1, and the boundary between the middle area ratio region RBb and the high area ratio region RBc is located on the fold line L2. However, as long as the area ratio of the colorant layer in the first portion 21 is lower than the area ratio of the colorant layer in the second portion 22, the positions of the boundaries are not limited to those shown in FIG.

Further, similarly to the description of the packaging sheet 10A (FIG. 4A), the boundary line between the low area ratio region RBa and the medium area ratio region RBb of this example, and the medium area ratio region RBb and the high area ratio region. The boundary line with RBc may be a straight line along the second direction D2, as shown in FIG. However, each of the boundary lines may form an angle with respect to the second direction D2, or may have a curved shape.

FIG. 6A shows a plan view of the packaging sheet 10C according to the third example as viewed from the outside. Further, FIG. 6B shows a plan view of the packaging sheet 10C folded and viewed from the side where the first region R1 and the second region R2 are overlapped.

The colorant layer is formed on the outer surface as in the packaging sheet 10A (FIGS. 4A and 4B) and the packaging sheet 10B (FIGS. 5A and 5B). The area ratio of the layer 18C gradually increases from the one end 11 to the other end 12 in the first direction D1. Also in this example, since the area ratio of the colorant layer 18C in the first portion 21 is lower than the area ratio of the colorant layer 18C in the second portion 22, the sealing tape is removed before opening as described above. It is possible to obtain an effect that the opening operation can be easily and surely performed at the time of opening without separating.

FIG. 7A shows a plan view of the packaging sheet 10D according to the fourth example as viewed from the outside. Further, FIG. 7B shows a plan view of the packaging sheet 10D folded and viewed from the side where the first region R1 and the second region R2 are overlapped.

As shown in FIGS. 7A and 7B, a stripe pattern colorant layer 18D is formed on the outer surface of the packaging sheet 10D. Each stripe of the colorant layer 18D is formed from one end to the other end in the second direction D2 along the second direction D2, and a plurality of such stripes are continuously formed in the first direction D1. .. Although the widths of the plurality of stripes shown in the figure are the same, the stripes formed in the first portion 21 to which the sealing tape 50 in the first region R1 is attached are the same as those in the second region R2. The stripes are formed at narrower intervals than the stripes formed on the attached second portion 22. As a result, the area ratio of the colorant layer 18D in the first portion 21 is lower than the area ratio of the colorant layer 18D in the second portion 22, and the sealing tape is not detached before opening when opening. It is possible to obtain the effect that the opening operation can be performed easily and surely.

As a modified example, the stripes in the first portion 21 and the stripes in the second portion 22 have the same interval, and the widths of the stripes are made different, so that the colorants in the first portion 21 and the second portion 22 are different from each other. The area ratio of the layer 18D may be different.

The stripe extends along the second direction D2, but the extending direction of the stripe may be angled with respect to the second direction D2. Further, the contour of the side edge of the stripe may be linear as in the illustrated example, or may have irregularities and may be, for example, wavy.

As described above, the stripe width, spacing, and extending direction are arbitrary, and the extending position is not particularly limited. As shown in FIGS. 7A and 7B, the colorant layer 18D is not formed on the one end 11 of the packaging sheet 10D, so that the one end 11 (end of the first region R1). The adhesiveness of the sealing tape at the position can be increased. As a result, the sealing tape is less likely to peel off at the one end 11 of the first region R1 to which force is more likely to be applied during opening, so that the work of lifting the first region R1 can be reliably performed during the process of pulling the sealing tape during opening. it can.

For example, the area ratio of the colorant layer in the portion from 0.5 mm to 5 mm in the first direction D1 from the one end 11 can be made lower than the average area ratio in the first portion 21, for example, 10% or less, preferably Can be 5% or less.

FIG. 8A shows a plan view of the packaging sheet 10E according to the fifth example as viewed from the outside. Further, FIG. 8B shows a plan view of the packaging sheet 10E folded and seen from the side where the first region R1 and the second region R2 are overlapped.

As shown in FIGS. 8A and 8B, a colorant layer 18E is formed on the outer surface of the packaging sheet 10E. The colorant layer 18E is not formed uniformly over the entire outer surface, but the low area ratio region REa, which is a region where the colorant layer has a lower area ratio, and the high area ratio where the colorant layer has a higher area ratio. And a region REb. The low area ratio region REa includes the first portion 21 to which the sealing tape is attached, and the high area ratio region REb includes the second portion 22 to which the sealing tape is attached.

In the low area ratio region REa, a plurality of small portions distributed in the colorant layer 18E are formed. On the other hand, the high area ratio region REb has a design in which the low area ratio region REa is inverted, and a plurality of small portions where the colorant layer 18E is not formed are formed. In the illustrated example, in the low area ratio region REa, the small portions of the square colorant layer are distributed in dots, and in the high area ratio region high area percentage REb, the small portions of the square in which the colorant layer is not formed are The structure is distributed in dots. This small portion may have any planar shape other than a square, for example, a quadrangle other than a square, another polygon, a circle, an ellipse, a heart, a star, and the like.

Although the area occupied by the small portion where the colorant layer is formed in the low area ratio region REa and the area occupied by the small portion where the colorant layer is not formed in the high area ratio region REb are formed to be the same, The two do not necessarily have to be the same. Further, if the area ratio of the colorant layer in the first portion 21 is lower than the area ratio of the colorant layer in the second portion 22, the small area where the colorant layer is formed in the low area ratio region REa and the high area ratio are high. The shape, area, and arrangement (interval between the small portions) of the area ratio region REb and the small portion where the colorant layer is not formed are not particularly limited.

FIG. 9A shows a plan view of the packaging sheet 10F according to the sixth example as viewed from the outside. Further, FIG. 9B shows a plan view of the packaging sheet 10F folded and seen from the side where the first region R1 and the second region R2 are overlapped.

As shown in FIGS. 9A and 9B, the colorant layer 18F is formed on the outer surface of the packaging sheet 10F. The colorant layer 18F is formed in the first direction D1 formed over the entire outer surface. A combination of a plurality of stripes extending along the stripe and a plurality of stripes extending along the second direction D2 formed over a part of the outer surface. In the illustrated example, a region including a plurality of stripes extending along the first direction D1 and not including a plurality of stripes extending along the second direction D2 is the low area ratio region RFa, which extends along the first direction D1. The area including the plurality of stripes and the plurality of stripes extending along the second direction D2 and forming the grid-like arrangement of the colorant layer 18F has the high area ratio RFb.

As shown in FIG. 9A, the area ratio of the colorant layer in the low area ratio region RFa is lower than the area ratio of the colorant layer 18F in the high area ratio region RFb. The low area ratio region RFa includes the first portion 21 to which the sealing tape is attached, and the high area ratio region RFb includes the second portion 22 to which the sealing tape is attached. Thereby, the adhesiveness of the first portion 21 and the second portion 22 can be adjusted in a well-balanced manner, and the unsealing operation can be easily and surely performed at the time of unsealing without the sealing tape being detached before unsealing.

If the area ratio of the colorant layer in the first portion 21 is lower than the area ratio of the colorant layer in the second portion 22, the stripe width, the interval, the shape of the side edges of the stripe, and the like are not particularly limited. Not done.

FIG. 10A shows a plan view of the packaging sheet 10G as the seventh example as seen from the outside. Further, FIG. 10B shows a plan view of the packaging sheet 10G folded and viewed from the side where the first region R1 and the second region R2 are overlapped.

The colorant layer 18G formed on the packaging sheet 10G has a locally high area ratio. More specifically, the low area ratio region RGa, the high area ratio region RGb, and the low area ratio region RGc are formed from the one end 11 side to the other end 12 side. The area ratio of the colorant layer in each of the low area ratio region RGa and the low area ratio region RGc is lower than the area ratio of the colorant layer in the high area ratio region RGb.

As shown in FIG. 10A, the first portion 21 is included in the low area ratio region RGa. On the other hand, since the second portion 22 is formed across the high area ratio region RGb and the low area ratio region RGc, in the second portion 22, the other end 12 side is the area of the colorant layer more than the one end 11 side. The rate is getting lower.

In the illustrated example, the boundary line between the high area ratio region RGb and the low area ratio region RGc has a zigzag shape. Then, one zigzag protruding portion of the boundary line between the high area ratio region RGb and the low area ratio region RGc is located at the edge of the second portion 22 on the one end 11 side. Further, the two protruding portions on both sides of the protruding portion are located at the edge of the second portion 22 on the other end 12 side. As a result, when focusing on the second portion 22, as shown in FIGS. 10A and 10B, a portion having a relatively high area ratio of the colorant layer is formed in a triangular shape having a base on the end 11 side. Will be.

As a result, in the second portion 22, the colorant layer 18G extends from the one end 11 to the other end 12 (from the upper side to the lower side in FIG. 10A, and from the lower side to the upper side in FIG. 10B). ), the area ratio is gradually reduced. Thereby, at the time of unsealing, the sealing tape 50 is peeled from the second region R1 side to the side farther from the side closer to the center of the packaging sheet 10G in the first direction D1 (from the lower side to the upper side in FIG. 10B). At the beginning of the opening operation, the sealing tape can be easily peeled off, so that the initial operation can be performed with a smaller force.

The absorbent article 1 (FIG. 1) packaged by the packaging sheet 10 according to the present embodiment is a sanitary napkin, a panty liner (carrying sheet), an incontinence pad or the like. As a specific configuration thereof, a liquid-impermeable back sheet, a liquid-permeable top sheet, and a main body (absorbent article main body) having an absorber provided between these two sheets are provided. May be Like the packaging sheet 10, the absorbent article 1 may have an elongated shape in which the first direction D1 in FIG. 1 is the longitudinal direction and the second direction D2 is the lateral direction.

As the back sheet of the absorbent article 1, it is possible to use a sheet material having at least water impermeability such as an olefin resin sheet such as polyethylene or polypropylene. Further, a laminated non-woven fabric in which a non-woven fabric is laminated on a polyethylene sheet or the like, or a non-woven fabric laminated sheet in which a waterproof film is interposed to substantially secure liquid impermeability can be used. Further, from the viewpoint of preventing stuffiness, it is more preferable to use one having moisture permeability.

The topsheet is a liquid-permeable sheet that allows body fluids such as menstrual blood, vaginal discharge, and urine to quickly permeate. As the surface sheet, a perforated or non-perforated non-woven fabric, a porous plastic sheet or the like is preferably used. As the material fibers constituting the non-woven fabric, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, and blended fibers thereof, and natural fibers such as cotton alone or Two or more kinds can be used in combination. Further, it is also possible to use a composite fiber in which synthetic fibers having different melting points are combined.

The absorber interposed between the back sheet and the top sheet is not limited as long as it is a material capable of absorbing and retaining body fluid, but it is preferable that it contains cotton-like pulp and a water-absorbent polymer. As the water-absorbent polymer, superabsorbent polymer granular powder (superabsorbent polymer (SAP)), superabsorbent polymer fiber (superabsorbent fiber (SAF)), and a combination thereof can be used. Examples of the pulp include chemical fibers obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate. As a raw material for chemical pulp, hardwood, softwood, etc. are used, but softwood is preferably used because of its long fiber length. Moreover, you may mix a synthetic fiber with an absorber.

The thickness of the absorbent article 1 can be in the range of 1 to 20 mm, and is preferably in the range of 2 to 10 mm. This thickness does not have to be uniform over the entire surface of the absorbent article 1, and by changing the thickness of the absorbent body, a structure in which the central portion in the longitudinal direction, the portion corresponding to the groove of the buttocks, etc. are swollen may be formed. it can.

1 Absorbent article 10, 10A, 10B, 10C, 10D, 10E, 10F, 10G Packaging sheet 11 First direction end 12 First direction other end 18, 18A, 18B, 18C, 18D, 18E, 18F, 18G Colorant layer 21 1st part (tape fixing part)
22 Second part (tape peeling part)
50 Sealing tape 50a Non-adhered portion 100 Packaging absorbent article D1 First direction (longitudinal direction)
D2 second direction (short direction)
L1 First fold line L2 Second fold line R1 First area R2 Second area R3 Third area

Claims (8)

The absorbent article can be packaged by stacking the first region including one end in the first direction on the outside of the second region including the other end in the first direction, and the first portion and the second portion on the outer surface of the first region. A packaging sheet for absorbent articles made of a resin film, wherein a sealing tape is attached over the second portion of the outer surface of the region,
On the outer surface of the packaging sheet, a colorant layer is formed at least over the entire exposed area of the absorbent article in a packaged state,
The packaging sheet, wherein the area ratio of the colorant layer in the first portion is lower than the area ratio of the colorant layer in the second portion. The packaging sheet according to claim 1, wherein the difference between the area ratio of the colorant layer in the second portion and the area ratio of the colorant layer in the first portion is 30% points or more. The packaging sheet according to claim 1, wherein at least the first portion and the second portion are roughened before forming the colorant layer. The packaging sheet according to any one of claims 1 to 3, wherein an area ratio of the colorant layer in a portion of 0.5 to 5 mm in the first direction from the one end is 5% or less. The packaging sheet according to any one of claims 1 to 4, wherein the peeling strength of the sealing tape is uniform. The said colorant layer is a packaging sheet as described in any one of Claim 1 to 5 whose area ratio of a colorant layer is low gradually or gradually as it approaches the said other end in the said 2nd part. The absorbent article can be packaged by stacking the first region including one end in the first direction on the outside of the second region including the other end in the first direction, and the first portion and the second portion on the outer surface of the first region. A method for producing a packaging sheet for absorbent articles, which comprises a resin film, wherein a sealing tape is attached over the second portion on the outer surface of the region,
A roughening step of roughening at least the outer surface of the resin sheet,
A colorant layer forming step of forming a colorant layer over at least the entire exposed area of the absorbent article in the packaged state on the outer surface of the roughened sheet,
In the colorant layer forming step, the area ratio of the colorant layer in the first portion is lower than the area ratio of the colorant layer in the second portion. A packaged absorbent article comprising the packaging sheet according to any one of claims 1 to 6, and an absorbent article packaged by the packaging sheet.