JP7328098B2 - Packaged absorbent article - Google Patents

Description

The present invention relates to packaged absorbent articles.

Absorbent articles such as sanitary napkins, incontinence pads, and panty liners (sheets for vaginal discharge) are wrapped in wrapping sheets (wrapped absorbent articles) for reasons of hygiene and convenience of carrying. commonly provided. As a packaging absorbent article, for example, an elongated packaging sheet is rolled and folded at least three times along with the absorbent article in the longitudinal direction, and both edges in the width direction of the packaging sheet are joined by heat sealing or the like to form a sealed portion. There are many things.

When opening such a packaged absorbent article, the user needs to peel off or release the seals on both edges. At that time, a sound (peeling sound) is generated when the packaging sheets are released from the sealing portion, and some users find such a sound unpleasant. Therefore, measures have been taken to prevent the user from feeling uncomfortable, such as reducing the volume of the peeling sound.

For example, Patent Document 1 describes a configuration in which a weak joint portion 41 and a strong joint portion 42 are formed in the seal portion 4 in this order from the central portion side of the individual package 1 toward the outer side. there is It is described that this configuration facilitates opening and reduces the peeling noise.

However, in Patent Document 1, joints with different joint strengths (weak joints 41 and strong joints 42) are formed by changing the height of the seal forming part C from the base surface of the roll pressure part. Therefore, adjustment of the joint strength at both joints can be complicated. Therefore, there is a demand for a simpler means that can reduce the discomfort caused by the peeling sound that occurs when the package is opened.

JP 2006-325933 A

In view of the above points, it is an object of one aspect of the present invention to provide a packaged absorbent article that can reduce discomfort caused by a peeling sound at the time of opening by simple means.

A first aspect of the present invention is a packaged absorbent article including a packaging sheet and an absorbent article wrapped by the packaging sheet, wherein the packaging sheet has a first region including one end in the longitudinal direction. The second region including the other end in the longitudinal direction is folded along the second fold line so as to overlap the first region along the second fold line, and the edges in the width direction orthogonal to the longitudinal direction are joined and sealed. and the sealing portion has an outer shape including an inclined line so that the center side is closer to the second folding line than the end side in the width direction in plan view. Including joints.

In the opening operation of a packaged absorbent article such as this embodiment, usually, the first step (Fig. 3(a)) to peel off the outermost second region and spread it upward (toward the second fold line), and then At least the second step (FIG. 3(b)) of peeling off the exposed first region and spreading downward (toward the first folding line) is performed.

Here, in the first step, when the second region is peeled off, the peeling direction of the second region is a direction P1 directed obliquely upward (FIG. 3A). On the other hand, when the first region is peeled off in the second step, the peeling direction of the first region is the obliquely downward direction P2 (FIG. 3(b)).

According to this aspect, the seal portion includes a plurality of first joint portions having an outer shape including an inclined line so that the center side is closer to the second folding line than the end side in the width direction in plan view. . In this configuration, the direction of the slanted line included in the first joint portion is along the peeling direction in the second step (the step of peeling and widening the first region that appears after peeling the second region). In two steps, the unbonding can be performed continuously with a relatively small force at the first bond. As a result, the peeling sound generated in the second step can be effectively reduced, and the sound generated during the entire opening operation can be reduced.

In a second aspect of the present invention, the inclined line included in the contour of the first joint forms an angle of 20-70° with respect to the longitudinal direction.

According to the second aspect, the direction of the line included in the first joint portion is aligned with the peeling direction in the second step (the step of peeling and widening the first region that appears after peeling the second region). Therefore, in the second step, the first joint can be continuously peeled off with a smaller force. Therefore, it is possible to further reduce the peeling sound generated in the second step and the sound generated during the entire opening operation.

In a third aspect of the present invention, the external shape of the first joint portion is a polygon having the inclined line as one side.

According to the third aspect, a certain amount of area can be secured for the first joint portion, and the sealing function of the sealing portion can be improved. Therefore, unintentional opening of the packaged absorbent article by the user can be prevented.

In the fourth aspect of the present invention, the seal portion has a plurality of outer shapes having an outer shape including a line inclined so that the center side is further away from the second folding line than the end side in the width direction in plan view. It further includes a second junction.

According to the fourth aspect, since the direction of the line included in the outer shape of the second joint is along the peeling direction in the first step (the step of peeling and expanding the second region), in the first step, The debonding of the second bond can be performed continuously with a relatively small force. In this aspect, since the peeling sound generated in the first step can also be reduced, the sound generated during the entire opening operation can be further reduced.

In a fifth aspect of the present invention, the external shape of the second joint portion is a polygon having the inclined line as one side.

According to the fifth aspect, the area of the second joint portion can be secured to some extent, and the sealing function of the sealing portion can be improved. Therefore, unintentional opening by the user can be prevented.

In the sixth aspect of the present invention, the first joint portion and the second joint portion adjacent to each other are in contact with each other.

According to the sixth aspect, the debonding in the first step and/or the second step can be made more continuous. As such, the sound produced during debonding at the bond is continuous and more uniform throughout the opening operation. Therefore, the unsealing sound is less likely to be heard by the user, and the user's discomfort can be reduced.

In a seventh aspect of the present invention, the outer shape of the first joint portion includes a line inclined so that the center side is further away from the second folding line than the end side in the width direction in a plan view.

According to the seventh aspect, the outer shape of the first joint further includes an inclined line along the peeling direction in the first step (the step of peeling and widening the second region). Therefore, even in the first step, it is possible to continuously release the bonding at the first bonding portion with a relatively small force. Therefore, the peeling sound generated in the first step can be reduced, and the sound generated during the entire opening operation can be further reduced.

In an eighth aspect of the present invention, the slanted line of the first joint crosses an extension of the slanted line of the second joint adjacent to the first joint in the width direction.

According to the eighth aspect, in the second step, while the packaging sheets are being unjoined along the peeling direction at the first joint, the joint is released at the adjacent second joint. It can be carried out. Therefore, in the second step, it is possible to more smoothly release the bonding of the second bonding portion as well as the first bonding portion.

ADVANTAGE OF THE INVENTION According to one aspect of the present invention, it is possible to provide a packaged absorbent article that can reduce discomfort caused by a peeling sound at the time of opening with a simple means.

1 is a diagram showing a state in which a packaged absorbent article according to one embodiment of the present invention is unfolded; FIG. 1 is a diagram showing a wrapped absorbent article according to an embodiment of the present invention and a state in which the wrapped absorbent article is being unfolded. FIG. FIG. 4 is a diagram illustrating an operation of opening the packaged absorbent article according to one embodiment of the present invention; FIG. 4 is a partially enlarged view of a seal portion according to the first embodiment of the present invention; It is a figure which shows the modification of the joint part of the seal|sticker part in 1st Embodiment of this invention. FIG. 10 is a partially enlarged view of a seal portion according to the second embodiment of the present invention; It is a partially enlarged view of a seal portion in a third embodiment of the present invention. It is a figure which shows the modification of the joint part of the seal|sticker part in 3rd Embodiment of this invention. FIG. 11 is a partially enlarged view of a seal portion in a fourth embodiment of the invention; It is the elements on larger scale of the seal part in a 5th embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each drawing, unless otherwise described, the same reference numerals may be attached to the same or corresponding configurations, and the description thereof may be omitted. Also, the drawings are schematic to aid understanding of the invention.

(Packaged absorbent article)
A packaged absorbent article according to one aspect of the present invention includes a packaging sheet and an absorbent article wrapped by the packaging sheet. FIG. 1 shows a packaged absorbent article 100 in an unfolded state according to one form of the present invention. FIG. 1 shows a state in which the absorbent article 1 is placed on the inner surface of the packaging sheet 10 (the inner surface of the packaged absorbent article) before the absorbent article 1 such as a sanitary napkin is wrapped with the packaging sheet 10. It is a figure also corresponding to . FIG. 2( a ) shows a packaged absorbent article 100 in which the absorbent article 1 is wrapped with the packaging sheet 10 .

As shown in FIG. 1, the planar shape of the packaging sheet 10 may be a rectangular elongated shape. In this specification and drawings, the longitudinal direction of the packaging sheet 10 is L, and the direction orthogonal to the longitudinal direction L is W. As shown in FIG. The shape of the packaging sheet 10 is not limited to a rectangular shape as shown in the drawing, but may be a shape other than a rectangle, such as a polygonal shape other than a rectangle, or an elliptical shape, depending on the shape of the absorbent article to be packaged.

The dimensions of the packaging sheet 10 also depend on the size and shape of the absorbent article 1 to be packaged. The length (sometimes simply called width) can be 75 to 180 mm. Further, in the folded state (FIG. 2(a)), the length in the longitudinal direction L may be 50 to 160 mm.

As a material for the packaging sheet 10, a polyolefin film such as polypropylene or polyethylene, a single-layer or multi-layer resin film such as polyester or polyvinyl alcohol, a nonwoven fabric, a laminated nonwoven fabric obtained by laminating a nonwoven fabric and a resin film, or the like can be used. can. Among these, a resin film is preferable from the viewpoint of improving the design. This is because it can print sharply with good color development. Moreover, when a resin film is used, the surface of the sheet becomes flat, so that the bonding strength between the sheets at the bonding portion is less likely to be non-uniform depending on the location. Therefore, even under relatively weak crimping conditions (heat and pressure conditions), the overall bonding strength of the seal portion can be improved. On the other hand, non-woven fabrics are preferable from the viewpoint of improving texture and soft feeling.

The packaging sheet 10 can wrap the absorbent article 1 by placing the absorbent article 1 on the inner surface and then folding it into three, for example. Folding in three means that a sheet is divided into three regions in one direction, and both end regions of the three regions are folded on the same side of the sheet and overlapped at least partially. Indicate how to fold.

To obtain the state in which the absorbent article 1 is wrapped by the packaging sheet 10 (FIG. 2(a)) from the unfolded state of FIG. is valley-folded along the first folding line FL1 in the longitudinal direction L toward the surface on which the absorbent article 1 is placed. Subsequently, the second region R2 including the other end 12 in the longitudinal direction L of the packaging sheet 10 is valley-folded along the second folding line FL2 in the longitudinal direction L to the same side as the side where the first region R1 is folded. . After folding the second region R2, the second region R2 overlaps the outside of the first region R1 (FIG. 2(a)). In this embodiment, the absorbent article 1 is folded together with the packaging sheet 10, but the absorbent article 1 may be folded by any method first, and then the first region R1 and the second region R2 may be folded in this order. good. In this specification, the region between the first region R1 and the second region R2 is referred to as a third region R3.

The method of wrapping the absorbent article 1 with the wrapping sheet 10 does not necessarily have to be folding in three as shown. If the packaging sheet 10 can be arranged such that the region including the other end 12 in the longitudinal direction L is arranged on the first region R1 including the other end 11 in the longitudinal direction L, the packaging sheet 10 can be folded in four or folded in half. It may be folded more than once. In that case, the end portion side of the first region R1 may be folded inside or outside in advance before overlapping the second region R2.

After the packaging sheet 10 is folded together with the absorbent article 1 as described above, the end of the second region R2, i.e., the other end 12 in the longitudinal direction L, is attached to the first region R1 by the tab tape 17. (Fig. 2(a)).

After being folded such that the second region R2 overlaps the first region R1, both edges in the width direction W of the packaging sheet 10 are joined to form the seal portions 18, 18. As shown in FIG. Such sealing portions 18, 18 prevent the absorbent article 1 from being exposed to the external environment, which is preferable from a hygienic point of view. The seal portions 18, 18 are formed to be unsealable or unjoinable. As used herein, "openable" or "releasable" refers to a seal that is strong enough to be manually opened and debonded by a user without the use of tools.

Each seal portion 18 is composed of a plurality of joint portions (described later in detail). This joint portion is a portion where the packaging sheets are joined together by applying pressure and heat from one side or both sides of the plurality of packaging sheets that have been folded and stacked as described above. The joint may be formed by actively applying pressure and heat to the packaging sheet 10 using pressure means and heating means, or may be formed by applying pressure and concomitantly generated heat using pressure means. may be formed by influencing the packaging sheet. The joint is preferably formed by heat sealing, ultrasonic sealing, or the like, but may be formed by other sealing means.

In addition, in the state after being folded in three as in the present embodiment, there are a portion where two packaging sheets 10 are overlapped and an area where three packaging sheets are overlapped. There is an area where a piece of packaging sheet 10 is joined and an area where three packaging sheets 10 are joined together.

The seal portions 18 , 18 are band-shaped strips extending in the longitudinal direction L on both edges of the folded packaging sheet 10 , where a plurality of joined portions are grouped together. As long as the seal portion 18 is formed so as not to overlap the wrapped absorbent article 1, the range and position of the edge portion in the width direction W of the packaged absorbent article 100 are not particularly limited. Each seal portion 18 may preferably be formed within a range of up to 25 mm from the end in the width direction W of the packaging sheet 10 . Also, each seal portion 18 may be formed over the entirety or part of the above range, and for example, within the above range, it may be formed in one or more strips with a width of 5 mm or more and less than 25 mm. A region having a predetermined width from an end in the width direction W of the packaging sheet 10 may include a portion where no joint portion exists. Also, the width of each seal portion 18 may not be constant in the longitudinal direction L, but may vary.

(Opening operation of packaged absorbent article)
Next, the opening operation of the packaged absorbent article will be described. In this specification, in order to simplify the description, the side closer to the second folding line FL2 may be referred to as the upper side, and the side closer to the first folding line FL1 may be referred to as the lower side (FIG. 2, etc.).

When opening the packaged absorbent article 100 as shown in FIG. 2(a) and trying to take out the absorbent article 1, the user performs at least two steps. The first step is to expand the outermost second region R2 to the outside in the longitudinal direction L, that is, to the upper side of the drawing. At this time, the user can hold the tab tape 17 and pull it toward the folding line FL2 to lift the second region R2 together with the tab tape 17 and peel it off from the first region R1. When the tab tape 17 is not attached, the second region R2 can be pulled up by holding the vicinity of the center in the width direction W of the other end 12 of the second region R2. FIG. 2(b) shows the state after the first step.

The following second step is a step of expanding the first region R1 outward in the longitudinal direction L, that is, downward in the drawing from the state shown in FIG. 2(b). At that time, the user holds one end 11 of the first region R1 of the packaging sheet 10, for example, near the center in the width direction W, and holds the first region R1 and pulls it toward the folding line FL1, thereby 1 area|region R1 can be lifted and peeled off from 3rd area|region R3. When the second step ends, the state shown in FIG. 1 is reached.

Here, the changes in the state of the packaging sheet 10 in these two steps will be further explained. First, in the first step, when the second region R2 is lifted and peeled off from the first region R1, the user, for example, moves the other end 12 of the second region R2 near the center in the width direction W or the tab tape 17 to one side. , and the vicinity of the fold line FL1 where the first region and the third region R3 are overlapped can be held with the other hand and pulled in opposite directions.

Due to the above-described pulling, the first region R1 and the second region R2 are released from the bonding at the sealing portions 18, 18 on both edges, and separated from each other. At that time, boundary lines 31, 31 between the peeled portion and the unpeeled portion are not parallel to the width direction W, but are inclined at an angle from the width direction W. As shown in FIG. Specifically, as shown in FIG. 3A, the boundary lines 31, 31 are lines in which the inner portions in the width direction W of the boundary lines 31, 31 are inclined upward from the width direction W. As shown in FIG. This is because the distance from the position where the user holds the first region R1 differs between the inner portion and the outer portion in the width direction W of each seal portion 18, and therefore, the inner portion in the width direction W where the distance is closer than the inner portion in the width direction W exerts a force, This is because it is easier for the parts to be unbonded first.

The peeling of the second region R2 and the first region R1 in the first step progresses by gradually moving the boundary lines 31, 31 along the longitudinal direction L toward the folding line FL2 as a whole. . At this time, the direction (peeling direction) in which the second region R2 is peeled off is the direction substantially perpendicular to the boundary lines 31, 31, ie, the arrows P1, P1 shown in FIG. 3(a).

In the subsequent second step, the first region R1 is lifted and peeled off from the third region R3. At this time, the user holds, for example, the center of one end 11 of the first region R1 in the width direction W with one hand, and the other end 12 of the already developed second region R2 near the center of the width direction W or the tab tape 17. can be held in the other hand and pulled in opposite directions. Alternatively, the user holds with one hand the end of the absorbent article 1 on the second region R2 side that appears as the second region R2 unfolds, and with the other hand the other end 12 of the second region R2 in the width direction. It is possible to hold the center of W or the tab tape 17 and pull them in opposite directions. In the latter peeling method, by lifting the absorbent article 1 from the third region R3, the first region R1 can be lifted from the third region R3 and the first region R1 and the third region R3 can be separated.

Also in the second step, boundary lines 32, 32 are formed between the part where the first region R1 and the third region R3 are peeled and the part where the first region R1 and the third region R3 are not peeled. The boundary lines 32, 32 are not parallel to the width direction W, and as shown in FIG.

As a whole, the separation between the first region R1 and the third region R3 in the second step progresses by gradually moving the boundary lines 32, 32 along the longitudinal direction L toward the folding line FL1. do. At this time, the direction (peeling direction) in which the first region R1 is peeled off is the direction orthogonal to the boundary lines 32, ie, the arrows P2, P2 shown in FIG. 3B.

As described above, the operation of unsealing the packaged absorbent article 100 includes at least the first step and the second step, but the peeling direction differs between the two steps.

In the opening operation, the peeling sound is generated in both the first step and the second step. However, depending on the packaged absorbent article, there are those in which the length of the second region R2 is short and the length of the first region R1 is long. In this case, since the portion where the first region R1 and the third region R3 are joined becomes longer, the time during which the peeling sound is generated in the second step may become longer.

Further, some users may carefully and slowly perform the first step, which is the initial stage of the opening operation, but then rapidly expand the first region R1 in the subsequent second step. In that case, a louder sound is likely to occur in the second step. Furthermore, in the second step, the expanded second region R2 is held with one hand, and the end of the absorbent article exposed by the first step (the end on the second region R2 side) is held with the other hand. In some cases, the absorbent article is removed from the packaging sheet. In that case, the sound generated when the adhesive on the back side of the absorbent article is peeled off from the packaging sheet (or release sheet) is also generated, so the sound of the second step tends to be louder. Therefore, it is required that the peeling sound in the second step can be made smaller than the peeling sound in the first step, or that the peeling sound is less audible.

The present invention has been made with particular attention to reducing the peeling noise in the second step as described above. By configuring the joint portion included in the seal portion 18 in a plan view shape including a line inclined so that the center side is closer to the second folding line FL2 (closer to the upper side) than the end side in the width direction , the peeling sound in the second step of peeling the first region R1 from the third region R3 can be reduced or made difficult to be heard.

As described above, each seal 18 includes a plurality of joints formed by sealing means such as heat sealing. Various configurations are conceivable as the configuration of the joint portion 20 . Embodiments having different structures of joints will be described below with reference to the drawings.

2 and 3, the seal portions 18, 18 are indicated by simple oblique lines, and illustration of the specific configuration of the joint portion included in the seal portion 18 is omitted. 2 and 3, the portion of the sealed portions 18, 18 where the overlapped packaging sheets 10 are joined together is indicated by thick oblique lines. The remaining portion is indicated by thin diagonal lines.

(First embodiment)
FIG. 4 is an enlarged view of the portion X of FIG. 2(a). However, in this embodiment, the first region R1 and the third region R3 are separated after the second region R2 superimposed on the outermost side of the sealed packaged absorbent article 100 is peeled off from the first region R1. The seal portion 18 in a joined state will be described.

As shown in FIG. 4 , a plurality of joints 20 are formed in the seal portion 18 . In this embodiment, the outer shape of the joint 20 is a slanted linear shape, more specifically, a rectangle with a large aspect ratio. As shown in FIG. 4, when focusing on one joint portion 20, the joint portion 20 according to the present embodiment is tilted so as to approach the center in the width direction W as it goes upward (closer to the second folding line FL2). Includes line a1. In other words, the joint portion 20 includes an inclined line a1 so that the center side is closer to the second folding line FL2 than the end side in the width direction. The direction of inclination of the line a1 is along the peeling direction P2 in the step of peeling the first region R1 after the second region R2 is peeled off, the second step (FIG. 3(a)). Therefore, in the second step (FIG. 3B), the release of the joint 20 can proceed along the direction in which the joint 20 receives the force. Therefore, since the force applied for unsealing is effectively used for releasing the bonding, the bonding can be released with a relatively small force. As a result, compared to the case where the width of the seal portion 18 is the same but the outer shape of the joint portion 20 does not include the inclined line a1 as described above, the peeling noise can be reduced.

In the form of FIG. 4, two rows are formed in which a plurality of joints 20 are arranged in parallel along the longitudinal direction L. In the embodiment shown in FIG. However, the number of rows of such a plurality of joints 20 may be one, or may be three or more. Further, in the illustrated embodiment, one row of a plurality of joints 20 arranged along the longitudinal direction L and the other row of a plurality of joints 20 arranged similarly along the longitudinal direction L are arranged in the width direction W does not overlap with However, it is also possible to adopt a configuration in which both rows overlap each other when viewed in the width direction W without the adjacent joint portions 20 contacting each other. Furthermore, as long as the joints 20 have the inclined line a1, the plurality of joints 20 may not be arranged in rows in the longitudinal direction L and/or the width direction W, but may be randomly arranged. may have been

In the embodiment shown in FIG. 4, the joint 20 is rectangular, but the external shape of the joint 20 may be a shape in which all or part of the vertexes of the rectangle as shown in the drawing are rounded. Also, one or both of the short sides of the rectangle may be formed so as to protrude outward.

In this embodiment, the inclined line a1 included in the outer shape of the joint 20 is preferably substantially straight. In that case, the length of the inclined line a1 can preferably be 1-15 mm, more preferably 2-10 mm. Further, when the outer diameter shape of the joint portion 20 is rectangular as in the present embodiment, the aspect ratio (length of the long side: length of the short side) is preferably 1:0.01 to 1: 0.50, more preferably 1:0.06 to 1:0.25.

In addition, the angle α (FIG. 4) of the inclined line a1 included in the external shape of the joint 20 with respect to the longitudinal direction L can be appropriately determined according to the size and packaging form of the absorbent article 1 and packaging sheet 10. is preferably 20 to 70°, more preferably 35 to 65°. By setting the angle α within the above range, the direction of the inclined line a1 included in the outer shape of the joint portion 20 can be made to follow the peeling direction, that is, parallel to the peeling direction. The peeling noise in the step can be further reduced, and the noise generated during the entire opening operation can be further reduced.

FIG. 5 shows a modification of the external shape of the joint 20 in the first embodiment. As shown in FIG. 5, the joining portion 20 is not limited to a linear or rod-like shape as shown in FIG. It may be a polygon containing a1, a partial circle, or other shapes. For example, as shown in FIG. 5(a), it can be a triangle having one side along a slanted line a1. Moreover, in the shape of a triangle having one side of the inclined line a1 as shown in FIG. 5(a), the sides other than the inclined line a1 may be curved (FIG. 5(b)).

Furthermore, as shown in FIG. 5C, the outer shape of the joint portion 20 may be a partial circle including a line a1 inclined so that the center side is closer to the second folding line FL2 than the end side in the width direction. Alternatively, it may be any shape including a slanted line a1 as shown in FIG. 5(d).

According to the external shape shown in FIGS. 5A to 5D, the joints 20 can have a certain area, and the sealing function of each joint 20 and thus the sealing portion 18 can be improved. When the user carries the packaged absorbent article 100, the stacked packaging sheets 10 may be displaced from each other and the joints 20 may be broken and the joints may be released. It is possible to prevent such unintentional disconnection by the user.

In addition, in FIGS. 5(a) to 5(d), since the end of the inclined line a1 is the apex of the outer shape of the joint portion 20, less force is required to start releasing the joint upon unsealing. As a result, the packaging sheets can be peeled off from each other more easily.

(Second embodiment)
FIG. 6 is an enlarged view of portion X of FIG. The joint portion 20 in the present embodiment has an elongated rectangular or linear shape similar to that shown in FIG. as the first joint 21 . The length, angle, etc. of the inclined line a1 are the same as those described for the first embodiment (FIG. 4).

In addition to the first joint portion 21, the joint portion 20 in the present embodiment has a line a2 inclined so that the center side of the width direction is further away from the second folding line FL2 (farther from the upper side) than the end side in the width direction. It has an elongated rectangular or linear second junction 22 . Although the 1st joint part 21 and the 2nd joint part 22 are adjacent with the form of illustration, they are arrange|positioned apart from each other. In addition, in this specification, the first joint portion 21 and the second joint portion 22 may be collectively referred to as the joint portion 20 .

The inclined line a2 included in the second bonding portion 22 is along the peeling direction P1 in the first step (FIG. 3A) of peeling the second region R2 from the first region R1. Therefore, in the first step (FIG. 3(a)), the release of the bonding at the second bonding portion 22 can proceed along the direction in which the second bonding portion 22 receives the force. Therefore, the force required for the first step can be made relatively small, and the magnitude of the peeling noise can be reduced. In addition, since the release of the bonding at the second bonding portion 22 can be performed more continuously in the first step, the peeling sound is less audible. Therefore, according to the present embodiment, the peeling noise can be reduced and hardly audible in both the first step and the second step. Pleasure etc. can be reduced.

The length of the line a2 included in the joint portion 22, which is inclined so that the center side is further away from the second folding line FL2 than the end side in the width direction, and the aspect ratio of the external shape of the joint portion 22 (the length of the long side length)/(short side length)) may be the same as that described for the joint portion 21 .

Further, the length of the inclined line a2 is 0.7 to 1.3 times the length of the inclined line a1 so that the center side is closer to the second folding line FL2 than the end side in the width direction. It is preferably 0.8 to 1.2 times longer, and more preferably the same length as the inclined line a1. As described above, the inclined line a2 contributes to reducing discomfort caused by the peeling sound in the first step. Therefore, if the inclined line a2 is long, a large force is required to start releasing the joining in the second step, which may hinder the releasing of the joining. However, by setting the relationship between the length of the slanted line a2 and the length of the slanted line a1 within the above range, the second joint 22 can be continuously released from the first step with a relatively small force. and preventing interference with uncoupling in the second step.

The angle β (FIG. 6) of the inclined line a2 included in the outer shape of the second joint portion 22 with respect to the longitudinal direction L can be appropriately determined according to the size and packaging form of the absorbent article 1 and packaging sheet 10. is preferably 10 to 60°, more preferably 25 to 55°. By setting the angle β within the above range, the direction of the inclined line a2 included in the outer shape of the second joint portion 22 can be made more parallel to the peeling direction, that is, more parallel to the peeling direction. The peeling sound in the first step can be further reduced, and the sound generated during the entire opening operation can be further reduced.

From the viewpoint of preventing hindrance to releasing the bonding in the second step, it is preferable to make the width of the linear second bonding portion 22 smaller than the width of the linear first bonding portion 21 . For example, the width of the second joint portion 22 is preferably 90% or less, more preferably 70% or less, and even more preferably 50% or less with respect to 100% of the width of the first joint portion 21 .

The angle α of the inclined line a1 included in the outer shape of the first joint 21 with respect to the longitudinal direction L, and the angle β of the inclined line a2 included in the outer shape of the second joint 22 with respect to the longitudinal direction L , may be different or the same. In the same case, the extension lines of the inclined line a1 and the inclined line a2 are orthogonal to each other.

Also, the arrangement of the first joint portion 21 and the second joint portion 22 is such that the inclined line a1 included in the outer shape of the first joint portion 21 is the second joint portion adjacent to the first joint portion 21, as shown in the drawing. It is preferable to intersect an extension of the inclined line a2 included in the outer shape of the portion 22 . As a result, in the second step, while the first joint portion 21 is being unjoined, the adjacent second joint portion can also be unjoined. In the second step, the second joint 22 may hinder the release of the joint as described above. The force required for releasing the bonding at the second bonding portion 22 is dispersed, so that the opening becomes smooth and the peeling noise can be reduced.

(Third Embodiment)
FIG. 7 is an enlarged view of the portion X of FIG. The joint portion 20 according to the present embodiment can also be said to have a shape in which the adjacent joint portions 21 and 22 in the second embodiment (FIG. 6) are fused.

As illustrated, the outer shape of the joint portion 20 has an inclined line a1 so that the center side in the width direction is closer to the second folding line FL2 than the end side in the width direction. As in the second embodiment (FIG. 6), in the second step, the peeling sound at the time of releasing the bonding of the bonding portion 20 can be made small and hard to hear. In addition, since the center side has the line a2 inclined away from the second folding line FL2 from the end side in the width direction, in the first step, the peeling sound when the bonding of the bonding portion 20 is released is small, and It can be made difficult to stick to.

In this embodiment, the outer shape of one joint portion 20 includes a slanted line a1 and a slanted line a2. The slanted line a2 intersects or is orthogonal to the peeling direction P2 in the second step, and thus may hinder the debonding in the second step. Since it may intersect or be orthogonal to the peel direction P1, there is a possibility that it may hinder the unbonding in the first step. However, if the shape including the inclined line a1 and the shape including the inclined line a2 are fused as in the present embodiment, the continuity of the joint 20 is high, so that the release of the joint at the joint 20 is Even if the peeling sound occurs, it can be made difficult to hear, which can be performed continuously in the first step and/or the second step.

In this embodiment, the length, angle, etc. of the slanted line a1 and the slanted line a2 are the same as those described in the second embodiment (FIG. 6).

FIG. 8 shows a modification of the joint 20 in the third embodiment. In the example shown in FIG. 8, part of the external shape of the joint 20 in FIG. 7 is curved. Specifically, the end of the line a2 inclined so that the central side is further away from the second folding line FL2 than the end side in the width direction is curved and the angle is changed. Compared with the example shown in FIG. 7, it can be said that the apex of the recessed portion is rounded in the example shown in FIG.

According to the illustrated example, in the first step, the portion where the first region R1 and the second region R2 of the packaging sheet 10 are joined along the inclined line a2 and the portion where the joining has already been released are separated. The width of the boundary gradually increases until the boundary finally reaches the inclined line a1. Therefore, the disconnection in the first step becomes smooth.

Also, since a relatively large area can be secured near the center of the joint 20, the sealing function can be improved, and unintentional disconnection of the seal 18 by the user can be prevented.

(Fourth embodiment)
FIG. 9 is an enlarged view of portion X of FIG. The external shape of the joint portion 20 in this embodiment is a triangle having a line a1 on one side that is inclined such that the center side is closer to the second folding line FL2 than the end side in the width direction. However, in this embodiment, the direction in which the lines other than the line a1 extend is different from the example shown in FIG. 5(a).

In the joint portion 20 according to the present embodiment as well, since the inclined line a1 is along the peeling direction P2 in the second step, the discomfort caused by the peeling sound in the second step is reduced, which is the first to third embodiments. It has the same effect as the form. The length, angle, etc. of the inclined line a1 in this embodiment are the same as those described in the first embodiment (FIG. 4).

In addition, since the joints 20 in the present embodiment can also secure a certain amount of area as described in the examples of FIGS. can be improved, and unintentional disconnection by the user can be prevented. Furthermore, since the end of the inclined line a1 becomes the apex of the outer shape, when unsealing, the release of the joint at the joint portion 20 can be started from a point, and the packaging sheets can be separated more easily.

In addition, in the form shown in FIG. 9, the outer shape of the joint portion 20 further has a line a2 inclined so that the center side is further from the second folding line FL2 than the end side in the width direction in a plan view. This inclined line a2 is along the peeling direction P1 in the first step (FIG. 3A) of peeling the second region R2 from the first region R1. Therefore, the joining release in the first step (FIG. 3A) can proceed along the direction in which the joining portion 20 receives the force. Therefore, the effect in the first step similar to that described in the second embodiment (FIG. 6) is obtained. Therefore, according to the present embodiment, the peeling noise can be reduced or hardly audible in both the first step and the second step, and the discomfort caused by the peeling noise can be reduced in the entire opening operation.

The length and angle of the line a2 included in the joint portion 20 of this embodiment, which is inclined so that the center side in the width direction is further away from the second folding line FL2 than the end side in the width direction, are the same as those in the second embodiment (FIG. 6). is similar to that described for

(Fifth embodiment)
FIG. 10 is an enlarged view of portion X of FIG. In this embodiment, the joint portion 20 includes two types of joint portions, a first joint portion 21 and a first joint portion 22 . In the illustrated form, the first joint portion 21 is a triangle having a line a1 on one side that is inclined such that the center side is closer to the second folding line FL2 than the end side in the width direction, and the second joint portion 22 is: It is a triangle having a line a1 on one side that is inclined so that the center side is further away from the second folding line FL2 than the end side in the width direction.

The lengths, angles, etc. of the slanted line a1 and the slanted line a2, and the relationship between the two may be the same as those described in the first to fourth embodiments (FIGS. 4 to 9). can.

The outer shape of each of the first joint portion 21 and the second joint portion 22 has an inclined line a1 such that the center side of the first joint portion 21 is closer to the second folding line FL2 than the end side in the width direction. and the second joint portion 22 is not particularly limited as long as it has an inclined line a2 in which the center side is further away from the second folding line FL2 than the widthwise end side. However, as shown in the figure, if the first joint portion 21 is a polygon including one side of the slanted line a1, it is possible to secure a certain amount of area and improve the sealing function. Since release can be started from the vertex, which is the end of the inclined line a1, the required force can be relatively small, which is preferable. Similarly, it is preferable that the second joint portion 22 is a polygon including the inclined line a2 on one side.

According to this embodiment, the presence of the first joint portion 21 having the outer shape including the inclined line a1 reduces the discomfort caused by the peeling sound in the second step of the opening operation of the packaged absorbent article. Effects similar to those described in the first to fourth embodiments (FIGS. 4 to 9) are obtained. In addition, since there is the second joint portion 22 having the outer shape including the inclined line a2, it is possible to reduce the discomfort caused by the peeling sound in the first step of the opening operation of the packaged absorbent article, which is different from the second embodiment. The same effects as those described in the fourth embodiment (FIGS. 6 to 9) are obtained. Therefore, in both the first step and the second step, it is possible to reduce the discomfort caused by the peeling sound without changing the width of the seal portion 18 or the like.

In the illustrated embodiment, the row in which the plurality of first joint portions 21 are arranged and the row in which the plurality of second joint portions 22 are arranged are arranged obliquely with respect to the longitudinal direction L, specifically, on the end side in the width direction of the row. The central side extends in a direction away from the second folding line FL2. However, the extending directions of the row in which the first joint portions 21 are arranged and the row in which the second joint portions 22 are arranged are not limited to those illustrated. If the first joint 22 has a slanted line a1 and the second joint 22 has a slanted line a2, then the first joint 21 and the second joint 22 are randomly arranged. may

Moreover, in this embodiment, the first joint portion 21 and the second joint portion 22 are in contact with each other. Accordingly, if the first joint portion 21 and the second joint portion 22 are in contact with each other, the discontinuous portions of the joint portions can be reduced, so that the peeling sound generated in the first step and/or the second step can be continuously reduced. can improve sexuality. As a result, the peeling sound is less audible.

In the illustrated embodiment, the rows in which the first joint portions 21 and the second joint portions 22 are alternately arranged and in contact with each other are formed to extend obliquely downward from obliquely upward. The direction of the row in which the first joint portions 21 and the second joint portions 22 are continuous is the direction along the peeling direction P1 in the first step. Therefore, in this embodiment, the debonding in the first step can be performed continuously along the peeling direction P1, and the peeling sound in the first step can be made less audible.

(Absorbent article)
The absorbent article 1 (FIGS. 1-3) used in the embodiment of the present invention may be a sanitary napkin, a panty liner (a sheet for vaginal discharge), a pad for light incontinence, or the like. In this specification, the absorbent article 1 has an elongated shape in plan view, but the plan view shape of the absorbent article 1 is not limited to that illustrated. Moreover, the total length of the absorbent article 1 can be 200 to 420 mm, and the width of the absorbent article 1 can be 50 to 110 mm.

The absorbent article 1 may have a structure in which a liquid-impermeable backsheet, an absorbent body, and a liquid-permeable topsheet are laminated in this order. As the back sheet, a sheet material having at least water impermeability, such as an olefin resin sheet such as polyethylene or polypropylene, can be used. A laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a laminated sheet of a nonwoven fabric in which a waterproof film is interposed to ensure substantially liquid impermeability can be used. Also, a material having moisture permeability may be used.

As the surface sheet, a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is preferably used. The material fibers that make up the nonwoven fabric include, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, regenerated fibers such as rayon and cupra, blended fibers thereof, and natural fibers such as cotton. It can be used in combination of two or more.

The absorber is not limited as long as it is a material that can absorb and retain bodily fluids, but it preferably contains cotton-like pulp and a water-absorbent polymer. As the absorbent polymer, superabsorbent polymer granules (SAP), superabsorbent fibers (SAF) and combinations thereof can be used. The pulp includes chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and artificial cellulose fibers such as rayon and acetate.

The thickness of the absorbent body can be in the range of 0.5 to 25 mm, preferably in the range of 1.5 to 6.5 mm. The absorbent body can also have a structure in which a region corresponding to the body fluid outlet (body fluid outlet corresponding region) and a region behind the body fluid outlet corresponding region facing the groove of the buttocks are swollen.

The absorber 4 has dimensions and a shape that does not protrude from the topsheet and the backsheet, and the front and rear edges of the absorber 4 are coated with an adhesive such as a hot-melt adhesive or the like. They are joined by adhesive means such as heat sealing and ultrasonic sealing. In addition, side nonwoven fabrics may be provided along the longitudinal direction at both ends in the width direction on the outer sides of the absorbent body. As the side nonwoven fabric, a water repellent nonwoven fabric or a hydrophilic treated nonwoven fabric can be used.

1 Absorbent article 10 Packaging sheet 11 One end in longitudinal direction 12 Other end in longitudinal direction 17 Tab tape 18 Sealing part 20 Joint part 21 First joint part 22 Second joint part 100 Packaged absorbent article a1 Center side from end side in width direction A line a2 that is inclined so that the direction of the width direction approaches the second folding line A line L that is inclined so that the center side is further away from the second folding line than the end side in the width direction Longitudinal direction FL1 First folding line FL2 Second folding line P1 Peeling direction P2 in the first step Peeling direction R1 in the second step First region R2 Second region R3 Third region W Width direction

Claims (7)

A packaged absorbent article comprising a packaging sheet and an absorbent article packaged by the packaging sheet,
In the packaging sheet, a first region including one end in the longitudinal direction is folded along a first fold line, and a second region including the other end in the longitudinal direction is folded along a second fold line so as to overlap the first region, A seal portion is formed by joining edges in a width direction orthogonal to the longitudinal direction,
The seal portion, in plan view,
A plurality of second folds arranged across the width direction of the seal portion, each having a rectangular outer shape whose long sides are inclined lines so that the center side is closer to the second folding line than the end side in the width direction. 1 junction;
A plurality of second folds arranged across the width direction of the seal portion, each having a rectangular outer shape whose long sides are lines inclined so that the center side is further away from the second fold line than the end side in the width direction. 2 joints ;
The wrapped absorbent article , wherein the first joints and the second joints are alternately arranged over the width direction . A packaged absorbent article comprising a packaging sheet and an absorbent article packaged by the packaging sheet,
In the packaging sheet, a first region including one end in the longitudinal direction is folded along a first fold line, and a second region including the other end in the longitudinal direction is folded along a second fold line so as to overlap the first region, A seal portion is formed by joining edges in a width direction orthogonal to the longitudinal direction,
The seal portion, in plan view,
A plurality of triangular outer shapes arranged over the width direction of the seal portion, each having a triangular outer shape whose longest side is a line inclined so that the center side is closer to the second folding line than the end side in the width direction. a first junction;
A plurality of triangular outer shapes arranged over the width direction of the seal portion, each having a triangular outer shape whose longest side is a line inclined so that the center side is further away from the second folding line than the end side in the width direction. a second junction ;
The wrapped absorbent article , wherein the first joints and the second joints are alternately arranged over the width direction . The wrapped absorbent article according to claim 1 or 2 , wherein said inclined line included in the outer shape of said first joint forms an angle of 20 to 70° with respect to said longitudinal direction. 4. The packaged absorbent article according to any one of claims 1 to 3 , wherein the adjacent first joints and second joints are in contact with each other. 5. The packaged absorbent article according to claim 4, wherein said first joint and said second joint are fused. 6. The outer shape of the first joint portion according to any one of claims 1 to 5 , wherein, in a plan view, the outer shape includes a line that is inclined such that the center side is further away from the second folding line than the end side in the width direction. 3. The packaged absorbent article according to the above paragraph. 7. Any one of claims 1 to 6 , wherein the slanted line of the first joint intersects an extension of the slanted line of the second joint adjacent to the first joint in the width direction. The packaged absorbent article described in .

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