Absorbent article packaging body and packaging of absorbent article packaging body

Abstract

The present invention provides an absorbent article package (1) comprising: an absorbent article (10) containing a water-absorbent resin and having a value determined by dividing the water retention amount by the water absorption amount of at least 0.55; and a packaging material (20). The moisture permeability of the packaging material (20) is 2000 g / m2 or less; the packaging material (20) is folded so that an unsealed end portion of the packaging material (20) extending in the horizontal direction is positioned on the packaging material (20) so as to encapsulate the absorbent article (10); the volatile substances (71, 72) are contained in the absorbent article packaging body (1); at least one of a pair of welded regions (R50) among a pair of side edge portions arranged in the horizontal direction has a plurality of welded portions (50) to which the packaging material (20) is intermittently joined, and a non-welded region (R51) that is continuous from one end edge to the other end edge of the welded region (R50) in the horizontal direction.

Description

Technical Field

[0001] The present invention relates to an absorbent article package and packaging of the absorbent article package. Background Art

[0002] An absorbent article package wrapped in a packaging member (packaging sheet) is known. Patent document 1 discloses an absorbent article package in which an absorbent article is folded together with a packaging sheet, the packaging sheet having an airtight layer and a fusion layer, the melting point of the fusion layer being lower than the melting point of the airtight layer. In the absorbent article package of patent document 1, a pair of sealing portions are provided on both sides of the packaging sheet. In patent document 1, when the packaging sheet is folded, adjacent fusion layers are fused to each other, thereby increasing the airtightness of the absorbent article package to reduce the restoring force of the folded absorbent article. On the other hand, the release strength of the sealing portion is set to 10N / 25mm or less, which ensures easy unsealing.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 6227592 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] In Patent Document 1, in order to consider the problem that the folded absorbent article unfolds due to the restoring force, the absorbent article package has high airtightness. However, in the case where the absorbent article package has high airtightness, air is less likely to be released from the inside of the absorbent article package, and therefore, there is a risk that the absorbent article package expands and ruptures.

[0008] On the other hand, examples of absorbent article packages include light incontinence pads and disposable diapers, which have a large amount of excretion from the wearer and contain a water-absorbent resin that absorbs and retains the excretion. In such absorbent article packages, in the case where airtightness is reduced, external humid air easily flows in. Then, the humid air swells the water-absorbent resin, which deteriorates the absorption performance of the absorbent article before use.

[0009] Patent Document 1 does not disclose that the absorbent article package containing a water-absorbent resin is related to the problem of airtightness balance of the absorbent article package.

[0010] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an absorbent article package that ensures the absorption performance of an absorbent article containing a water-absorbent resin and suppresses swelling of the absorbent article package.

[0011] Solutions for solving problems

[0012] The main aspect of the present invention for achieving the above-mentioned object is an absorbent article package having a transverse direction, a longitudinal direction and a thickness direction, the absorbent article package comprising: an absorbent article containing a water-absorbent resin; and a packaging member, in which a value obtained by dividing a water retention amount by a water absorption amount is 0.55 or more, and a moisture permeability of the packaging member is 2000 g / m 2 ·24h or less, the packaging member encapsulates the absorbent article, the packaging member is folded so that the unsealed end of the packaging member is located on the packaging member, and the unsealed end extends along the transverse direction, a volatile substance, which is contained in the absorbent article packaging body, a pair of welding areas, which are arranged in a pair of transverse side edge portions, at least one of the pair of welding areas has: a plurality of welding portions, which intermittently join the packaging member; and a non-welding area, which is continuous from one side end edge in the transverse direction to the other side end edge in the transverse direction of at least one of the pair of welding areas.

[0013] Features other than those described above will become apparent from the description of this specification with reference to the accompanying drawings.

[0014] Effects of the Invention

[0015] According to the present invention, in an absorbent article package containing a water-absorbent resin, it is possible to ensure the absorption performance of the absorbent article and suppress expansion of the absorbent article package. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] [ Figure 1 ] Figure 1 It is a plan view of the absorbent article package 1.

[0017] [ Figure 2 ] Figure 2 It is a schematic cross-sectional view of the absorbent article package 1.

[0018] [ Figure 3 ] Figure 3 This is a plan view of the absorbent article package 1 in the unfolded state as viewed from the inside.

[0019] [ Figure 4 ] Figure 4 This is a plan view of the absorbent article package 1 in the unfolded state as viewed from the outside.

[0020] [ Figure 5 ] Figure 5 is a schematic cross-sectional view of a light incontinence pad 10 .

[0021] [ Figure 6 ] Figure 6A is an explanatory diagram illustrating the weld region R50. Figure 6 B is an explanatory diagram illustrating a weld region R50 according to a modification.

[0022] [ Figure 7 ] Figure 7 It is an explanatory diagram illustrating a single package body 1 according to a modification.

[0023] [ Figure 8 ] Figure 8 is a schematic cross-sectional view of a pad 10 according to a modified example.

[0024] [ Fig. 9 ] Fig. 9 A and Fig. 9 B is an explanatory diagram illustrating a method of measuring a thickness variation of a single package 1 .

[0025] [ Fig.10 ] Fig.10 A to Fig.10 C is an explanatory diagram illustrating a method of measuring a thickness variation of the package 90 . DETAILED DESCRIPTION

[0026] At least the following matters will be made clear through the description of this specification and the accompanying drawings.

[0027] (Aspect 1)

[0028] An absorbent article package having a transverse direction, a longitudinal direction and a thickness direction, the absorbent article package comprising: an absorbent article containing a water-absorbent resin; and a packaging member, in which a value obtained by dividing a water retention amount by a water absorption amount is 0.55 or more, and a moisture permeability of the packaging member is 2000 g / m 2 ·24h or less, the packaging member encapsulates the absorbent article, the packaging member is folded so that the unsealed end of the packaging member is located on the packaging member, and the unsealed end extends along the transverse direction, a volatile substance, which is contained in the absorbent article packaging body, a pair of welding areas, which are arranged in a pair of transverse side edge portions, at least one of the pair of welding areas has: a plurality of welding portions, which intermittently join the packaging member; and a non-welding area, which is continuous from one side end edge in the transverse direction to the other side end edge in the transverse direction of at least one of the pair of welding areas.

[0029] According to aspect 1, the moisture permeability of the packaging member is greater than 2000 g / m 2Compared with the case of 24h, external moist air is less likely to penetrate the packaging member. The welded area makes it less likely that a gap will be formed between the unsealed end of the packaging member and the opposing portion of the packaging member, making it less likely that external moist air will flow in from the unsealed end of the packaging member. Volatile substances increase the internal pressure of the absorbent article package, making it less likely that moist air will flow into the absorbent article package. Therefore, the deterioration of the absorptive performance of the absorbent article due to the absorbent resin that has absorbed moist air before use is suppressed. Gases (such as volatile substances) inside the absorbent article package can flow out through the non-welded area that is continuous in the lateral direction in the welded area. Therefore, the expansion of the absorbent article package due to gas can be suppressed.

[0030] (Aspect 2)

[0031] The absorbent article package body according to aspect 1, wherein the unsealed end portion of the packaging member has an adhered region adhered to an opposing portion of the packaging member at a position between the pair of welded regions.

[0032] According to aspect 2, the unsealed end of the packaging member is adhered to the opposite part of the packaging member, which increases the airtightness of the unsealed end of the packaging member. As a result, external humid air is less likely to flow in from the unsealed end of the packaging member. This ensures the absorption performance of the absorbent article.

[0033] (Aspect 3)

[0034] An absorbent article packaging body according to aspect 2, wherein the unsealed end of the packaging member has a non-adhesive area on the unsealed end side in the longitudinal direction of the packaging member relative to the adhesive area, and the absorbent article packaging body has a fastening belt that fastens the non-adhesive area to the packaging member.

[0035] According to aspect 3, the fastening tape can suppress the curling of the non-adhesive area. This can suppress the release of the adhesive area and the welded portion. Therefore, the airtightness of the unsealed end of the packaging member is ensured, which can suppress the inflow of external humid air. This ensures the absorption performance of the absorbent article.

[0036] (Aspect 4)

[0037] The absorbent article package according to aspect 2 or 3, wherein at least one of the pair of fusion-bonded regions has a region overlapping with the adhesion region in the thickness direction.

[0038] According to aspect 4, the bonding strength of the welded area is increased by the welded portion and the adhesion area. As a result, the airtightness of the unsealed end of the packaging member is increased, and accidental unsealing can be suppressed. Therefore, the airtightness of the unsealed end of the packaging member is ensured, which can suppress the inflow of external humid air. This ensures the absorption performance of the absorbent article.

[0039] (Aspect 5)

[0040] The absorbent article packaging body according to any one of aspects 1 to 4, wherein the volatile substance is applied to at least one of a material constituting the absorbent article and an inner surface of the packaging member.

[0041] According to aspect 5, the volatile substances gradually evaporate from the materials constituting the absorbent article and the packaging member, which increases the persistence of the volatile substances. Therefore, the volatile substances prolong the period of time during which the internal pressure of the absorbent article packaging body is high, making it easier to maintain the effect of suppressing the inflow of external humid air through the non-welded area.

[0042] (Aspect 6)

[0043] The absorbent article package according to any one of aspects 1 to 5, wherein at least one of the pair of welded regions has the non-welded region that is continuous in the transverse direction.

[0044] According to aspect 6, the volatile material can more easily flow out smoothly through the non-welded area that is continuous in a linear manner in the transverse direction. The volatile material is appropriately released from the absorbent article package, which can suppress expansion of the absorbent article package due to the volatile material.

[0045] (Aspect 7)

[0046] The absorbent article package according to aspect 6, wherein the length of the non-welded region in the longitudinal direction is greater than 1 / 2 of the length of the welded portion adjacent to the non-welded region on one side in the longitudinal direction.

[0047] According to aspect 7, the longitudinal length of the non-welded region can be ensured, and the volatile substance can flow out from the non-welded region appropriately. This can suppress the expansion of the absorbent article package due to the volatile substance.

[0048] (Aspect 8)

[0049] The absorbent article package according to any one of aspects 1 to 7, wherein the volatility of the volatile substance is higher than that of menthone glycerol acetal.

[0050] According to aspect 8, compared with the case where the volatile substance is menthone glycerol acetal, the volatile substance increases the internal pressure of the absorbent article package at an early stage, which can suppress the inflow of external humid air.

[0051] (Aspect 9)

[0052] The absorbent article package according to any one of aspects 1 to 8, wherein the volatility of the volatile substance is lower than that of menthone glycerol acetal.

[0053] According to aspect 9, compared with the case where the volatile substance is menthone glycerol acetal, the persistence of the volatile substance is high and the volatile substance increases the internal pressure of the absorbent article package for a long period of time. This can suppress the inflow of external humid air.

[0054] (Aspect 10)

[0055] The absorbent article package according to any one of aspects 1 to 9, wherein the oxygen permeability of the packaging member in the thickness direction of the packaging member is 100 cc / m at 23°C. 2 / 24h / atm or less.

[0056] According to aspect 10, the oxygen permeability of the packaging member is greater than 100 cc / m at 23°C. 2 Compared with the case of / 24h / atm, external moist air is less likely to penetrate the packaging member and flow in. Therefore, the absorption performance of the absorbent article can be ensured.

[0057] (Aspect 11)

[0058] The absorbent article package according to any one of aspects 1 to 10, wherein the absorbent article has an absorbent core, and in the absorbent article, an oil agent is placed on the skin side with respect to the absorbent core.

[0059] According to aspect 11, the oil agent makes it less likely that moist air that has flowed into the absorbent article package will flow into the absorbent core. Therefore, the absorption performance of the absorbent article can be ensured.

[0060] (Aspect 12)

[0061] The absorbent article package according to any one of aspects 1 to 11, wherein smoothness on the outer surface of the packaging member is lower than smoothness on the inner surface of the packaging member.

[0062] According to aspect 12, the outer surface of the packaging member has a low smoothness and a high friction coefficient, which can reduce the movement of the absorbent article package during circulation and while being carried by the user. Therefore, accidental opening of the absorbent article package can be suppressed, which makes it less likely that humid air will flow in from the outside of the absorbent article package. This can ensure the absorption performance of the absorbent article.

[0063] (Aspect 13)

[0064] The absorbent article package according to any one of aspects 1 to 11, wherein smoothness on an inner surface of the packaging member is lower than smoothness on an outer surface of the packaging member.

[0065] According to aspect 13, the inner surface of the packaging member has low smoothness and large concavoconvexity, which makes it easy for volatile substances to fill the concave parts of such concavoconvex parts. Therefore, moist air is less likely to flow in from the outside of the absorbent article packaging body. This can ensure the absorption performance of the absorbent article.

[0066] (Aspect 14)

[0067] A package for an absorbent article package, the package comprising: an absorbent article package according to any one of aspects 1 to 11 contained in a bag, the package having a predetermined direction corresponding to the thickness direction of the absorbent article package inside the bag, satisfying the expression "(T1-T2) / T1<(t1-t2) / t1", T1 being the length of the package in the natural state in the predetermined direction, and T2 being the length of the package when the package is subjected to a load of 1000 N / m 2 The length of the package in the predetermined direction when the force is applied in the predetermined direction, t1 refers to the length in the thickness direction of the absorbent article package in the natural state, and t2 refers to the length of the absorbent article package when the absorbent article package is compressed at 1000N / m 2 The length of the absorbent article package in the thickness direction when the force is pressed in the thickness direction.

[0068] According to aspect 14, the thickness change rate of the absorbent article packaging body in which the volatile substance is directly contained is more likely to become larger, which makes it easier for the gas to flow out. This can more reliably suppress the expansion of the absorbent article packaging body. On the other hand, in the package, the thickness change rate is reduced, making it less likely that the gas is released to increase the internal pressure. This makes it less likely that external humid air flows in. As a result, the deterioration of the absorption performance of the absorbent article enclosed in the package can be suppressed.

[0069] ===Implementation Method===

[0070] Hereinafter, the absorbent article package according to the present embodiment will be described by taking a single package of a light incontinence pad as an example.

[0071] <<Basic Structure of Absorbent Article Package 1>>

[0072] Figure 1 It is a plan view of the absorbent article package 1. Figure 2 It is a schematic cross-sectional view of the absorbent article package 1. Figure 3 This is a plan view of the absorbent article package 1 in the unfolded state as viewed from the inside. Figure 4 This is a plan view of the absorbent article package 1 in the unfolded state as viewed from the outside. Figure 5 is a schematic cross-sectional view of a light incontinence pad 10 .

[0073] The absorbent article package 1 (hereinafter referred to as "single package 1") includes a light incontinence pad 10 (hereinafter referred to as "pad 10") as an absorbent article and a packaging member 20. The single package 1 ( Figure 1 ) has a lateral direction, a longitudinal direction and a thickness direction which are orthogonal to each other.

[0074] like Figure 4 As shown, the packaging member 20 is a rectangular sheet. The transverse direction of the individual packaging body 1 corresponds to the short side direction of the packaging body 20, and the longitudinal direction of the individual packaging body 1 corresponds to the length direction of the packaging member 20. The pad 10 is placed on the inner surface of the packaging member 20 via the peeling sheet 60, and the packaging member 20 is folded together with the pad 10 at two folding portions F1 and F2 extending in the transverse direction of the individual packaging body 1.

[0075] However, it is not limited thereto. For example, the packaging member 20 and the pad 10 may be folded separately. A plurality of pads 10 may be enclosed in a single packaging member 20. The packaging member 20 and the pad 10 may be folded at three or more folding portions extending in the transverse direction, or may be folded at folding portions extending in two directions (the transverse direction and the length direction of the packaging member 20).

[0076] A pair of lateral side edges of the packaging member 20 folded together with the pad 10 are intermittently joined and sealed by a plurality of welds 50. Examples of methods for forming the welds 50 include known welding methods, such as ultrasonic welding and heat welding. In the following description, "a pair of weld regions R50" refers to an area in which a plurality of welds 50 are arranged in a pair of lateral side edges of a single packaging body 1. Each weld region R50 is a rectangular area surrounded by the following lines: a line extending in the longitudinal direction and passing through the ends of the plurality of welds 50 on one side in the transverse direction at the farthest point; a line extending in the longitudinal direction and passing through the ends of the plurality of welds 50 on the other side in the transverse direction at the farthest point; a line extending in the transverse direction and passing through the ends of the plurality of welds 50 on one side in the longitudinal direction at the farthest point; and a line extending in the transverse direction and passing through the ends of the plurality of welds 50 on the other side in the longitudinal direction at the farthest point.

[0077] The release sheet 60 is a rectangular sheet and is provided between the pad 10 and the packaging member 20 in a manner covering the entire area of ​​the non-slip adhesive portion 18 in the pad 10. The release sheet 60 is non-detachably fixed to the inner surface of the packaging member 20 by a fixing portion 61 coated with a hot melt adhesive, for example. Figure 4 In the embodiment, three fixing portions 61 are arranged at intervals in the length direction of the packaging member 20, but there is no particular limitation on the number, shape, and arrangement of the fixing portions 61. The inner surface of the peeling sheet 60 (the surface facing the pad 10) is subjected to a peelable treatment using silicone resin or the like. Therefore, the non-slip adhesive portion 18 in the pad 10 is easily peelable. Therefore, when the pad 10 is used, the peeling sheet 60 is removed from the pad 10 together with the packaging member 20.

[0078] <<Basic Structure of Pad 10>>

[0079] The pad 10 in the unfolded state has a lateral direction, a length direction, and a thickness direction that are orthogonal to each other. The lateral direction of the pad 10 corresponds to the lateral direction of the single package 1, and the length direction of the pad 10 corresponds to the longitudinal direction of the single package 1 (the length direction of the packaging member 20). In the thickness direction of the pad 10, the side in contact with the wearer's skin is called the skin side, and the side opposite thereto is called the non-skin side. In this embodiment, in order to illustrate the symmetrical structure and shape of the pad 10 relative to the length direction, one side of the pad 10 in the length direction may correspond to the wearer's ventral side or dorsal side.

[0080] like Figure 5As shown, the pad 10 includes a first absorbent body 30, a second absorbent body 40 located on the non-skin side relative to the first absorbent body 30, a front sheet 11 located on the skin side relative to the first absorbent body 30, an intermediate sheet 12 located between the front sheet 11 and the first absorbent body 30, a pair of first side sheets 13, a pair of second side sheets 15, and a back sheet 16 located on the non-skin side relative to the second absorbent body 40.

[0081] The front sheet 11 and the middle sheet 12 are liquid-permeable sheets. Examples of liquid-permeable sheets include nonwoven sheets (such as breathable nonwoven sheets or spunbonded nonwoven sheets) and synthetic resin films with through holes. The back sheet 16 is a liquid-impermeable sheet. Examples of liquid-impermeable sheets include synthetic resin films made of polyethylene (PE) or polypropylene (PP), and composite sheets formed by synthetic resin films and nonwoven sheets. Examples of the first side sheet 13 and the second side sheet 15 include hydrophobic sheets (such as nonwoven sheets containing hydrophobic fibers), but there is no particular limitation. In order to avoid the complexity of the drawings, not all materials are shown, but materials adjacent in the thickness direction are bonded to each other by adhesives such as hot melt adhesives.

[0082] The first absorbent body 30 includes a first absorbent core 31, a first skin-side core wrap 32, and a first non-skin-side core wrap 33. The first absorbent core 31 is made of a superabsorbent polymer (SAP) and is rectangular in plan view. Figure 3 As shown. The first skin side core wrap 32 and the first non-skin side core wrap 33 are liquid-permeable sheets, and non-woven fabric sheets or the like may be used. Both transverse ends of the first skin side core wrap 32 are folded back on the non-skin side surface of the first non-skin side core wrap 33 so as to enclose both transverse end edges of the first absorbent core 31 and both transverse end edges of the first non-skin side core wrap 33.

[0083] A pair of first side sheets 13 are folded back from the transverse ends of the non-skin side surface of the first absorbent body 30 toward the skin side so as to respectively enclose: the transverse end edges of the first absorbent body 30; the transverse end edges of the intermediate sheet 12; and the transverse end edges of the front sheet 11. Then, a pair of first side sheets 13 are fixed to the skin side surface of the front sheet 11 using hot melt adhesive HMA1. A single elastic line 14 that stretches in the length direction is placed at the corresponding transverse end edges of the first side sheet 13. Due to the contraction of the elastic line 14, the transverse end portions of the first side sheet 13 are more likely to stand up toward the skin side. Specifically, the first side sheet 13 is more likely to stand up at the portion of the first side sheet 13 fixed to the second side sheet 15 using hot melt adhesive HMA2, which can suppress the side leakage of excrement.

[0084] The second absorbent body 40 includes a second absorbent core 41, a second skin-side core wrap 42, and a second non-skin-side core wrap 43. The second absorbent core 41 is obtained by forming liquid absorbent fibers such as pulp fibers into a predetermined shape and adding a super absorbent polymer (SAP). Figure 3 As shown, the second absorbent core 41 with bent ends in the longitudinal direction is roughly rectangular, and the length of the second absorbent core 41 in the longitudinal direction is longer than the length of the first absorbent core 31 in the longitudinal direction. The second skin-side core wrapping member 42 and the second non-skin-side core wrapping member 43 are liquid-permeable sheets, and examples thereof include tissue paper and non-woven fabric sheets. The transverse ends of the second skin-side core wrapping member 42 are folded back on the skin-side surface of the second non-skin-side core wrapping member 43 so as to encapsulate the transverse end edges of the second absorbent core 41.

[0085] A pair of second side sheets 15 are placed between the first side sheet 13 and the second absorbent body 40, respectively, and extend laterally outward beyond both lateral ends of the second absorbent body 40. Such extended portions are bonded to the back sheet 16 with an adhesive (not shown), which suppresses the leakage of the excrement absorbed by the second absorbent body 40.

[0086] For example, a non-slip adhesive portion 18 to which a hot melt adhesive has been applied is provided on the non-skin side surface of the pad 10 (the non-skin side surface of the back sheet 16). The non-slip adhesive portion 18 is attached to the skin side surface of the wearer's underwear, so the pad 10 is used in a state of being fixed to the underwear. Figure 4 In the embodiment, two non-slip adhesive portions 18 which are long in the length direction of the pad 10 and form a rectangular shape are arranged at intervals in the lateral direction, but the shape, number, and arrangement of the non-slip adhesive portions 18 are not particularly limited thereto.

[0087] The basic configuration of the pad 10 has been described above, but the above configuration of the pad 10 is an example and is not limited thereto. For example, the configuration and shape of the pad 10 may be asymmetric with respect to the length direction. The pad 10 may include a single layer of absorbent without stacking multiple absorbents in the thickness direction.

[0088] In the following description, the first absorbent body 30 and the second absorbent body 40 will be collectively referred to as absorbent bodies 30, 40. The first absorbent core 31 and the second absorbent core 41 will be collectively referred to as absorbent cores 31, 41.

[0089] === Absorption performance of pad 10 and expansion of individual package 1 ===

[0090] Figure 6 A is an explanatory diagram illustrating the weld region R50. Figure 6 B is an explanatory diagram illustrating a weld region R50 according to a modification. Figure 7 It is an explanatory diagram illustrating a single package body 1 according to a modification. Figure 8 is a schematic cross-sectional view of a pad 10 according to a modified example.

[0091] The absorbent core 31, 41 in the pad 10 contains a water-absorbent resin (super absorbent polymer) that retains the absorbed liquid. Examples of the water-absorbent resin include absorbent fibers in addition to super absorbent polymers (SAP). In the pad 10 containing the water-absorbent resin, the ratio of "water retention" (the amount of absorbed water that the absorbent article can retain) to "water absorption" (the amount of water that the absorbent article can absorb) increases. Therefore, for example, in the light incontinence pad 10 of the present embodiment and disposable diapers containing a larger amount of excrement than sanitary absorbent articles, the water-absorbent resin can suppress the leakage of the absorbed excrement.

[0092] However, in a single package of an absorbent article having a high water retention capacity, in a case where the airtightness of the single package is low and external humid air easily flows in, the water-absorbent resin absorbs and retains moisture from the humid air. Therefore, there is a problem that the absorption performance (water retention performance) of the absorbent article deteriorates before use. In particular, in a case where the single package is circulated in a high humidity area for a long time or stored in a high humidity environment such as a bathroom, this problem of deterioration in absorption performance becomes significant.

[0093] On the other hand, if the airtightness of the individual package is too high, gas is less likely to be released from the inside of the individual package, so there is a risk that the individual package will swell and then rupture.

[0094] In the present embodiment, a single package 1 includes a pad 10, which contains a water-absorbent resin and has a high water retention capacity. Specifically, in the pad 10, the value obtained by dividing the water retention capacity by the water absorption capacity is 0.55 or more (water retention capacity / water absorption capacity ≥ 0.55). In such a single package 1 including the pad 10, the following configuration is provided. The absorbent article with a high water retention capacity is not limited to a light incontinence pad, but may also be, for example, a urine pad or a disposable diaper.

[0095] First, the moisture permeability of the packaging member 20 is set to 2000 g / m 2 24h or less. Therefore, the moisture permeability of the packaging member 20 is greater than 2000g / m 2 Compared with the case of 24h, external humid air is less likely to penetrate the packaging member 20 in the thickness direction of the packaging member. Therefore, humid air is less likely to flow inside the single package 1. This can suppress the absorption performance of the pad 10 from being deteriorated due to the superabsorbent polymer in the pad 10 absorbing and retaining moisture from humid air before use.

[0096] In a state where the packaging member 20 is folded at two folded portions F1, F2 extending in the transverse direction, the packaging member 20 has an end portion 20a on one side in the length direction located on the outer surface of the individual packaging body 1. The end portion 20a on one side in the length direction in this state serves as an unsealing end portion 20a, which is a starting point for opening the individual packaging body 1. Figure 2 As shown, in the state where the packaging member 20 is folded, the end (unsealed end) 20a on one side in the length direction of the packaging member 20 overlaps with the end 20b on the other side in the length direction of the packaging member 20 in the thickness direction. The pad 10 is not between the end 20a on one side in the length direction and the end 20b on the other side in the length direction. That is, the packaging member 20 encloses the pad 10 and is folded so that the unsealed end 20a of the packaging member 20 extending in the transverse direction is located on the packaging member 20.

[0097] In this case, since the pad 10 does not face the unsealed end 20a of the packaging member 20, the pad 10 is unlikely to come into contact with external humid air at a portion of the unsealed end 20a. A pair of lateral side edges of the packaging member 20 are joined by a pair of welding regions R50 (a plurality of welding portions 50). Therefore, even at a position between a pair of welding regions R50, the unsealed end 20a of the packaging member 20 is easy to come into contact with the opposite portion (20b) of the packaging member 20. As a result, a gap is unlikely to be formed. Therefore, external humid air is unlikely to flow in from the unsealed end 20a of the packaging member 20. As a result, the absorption performance of the pad 10 can be suppressed from deteriorating before use due to the high absorbency polymer in the pad 10 absorbing and retaining moisture from humid air.

[0098] like Figure 6 As shown in A, a pair of welding regions R50 each include: a plurality of welding portions 50, which intermittently join the packaging member 20; and a non-welding region R51, which is continuous from the end edge of one lateral side of the welding region R50 to the end edge of the other lateral side. That is, the welding region R50 has non-welding regions R51, which are used as gas passages extending laterally from the inside of the welding region R50 to the outside, but does not have welding portions 50 that are continuous over the entire longitudinal direction of the single package 1. Therefore, the gas inside the single package 1 can flow through the welding region R50 via the non-welding region R51, and then flow out of the single package 1. This can suppress the expansion of the single package 1 and prevent the rupture of the single package 1.

[0099] In the present embodiment, the same welding pattern is applied to a pair of welding regions R50, but it is not limited thereto. A pair of welding regions R50 may have different welding patterns. For example, only one welding region in a pair of welding regions R50 may have a non-welding region R51 that is continuous in the transverse direction. In this case, the gas inside the single package 1 may also be released to the outside. However, as in the present embodiment, in the case where a pair of welding regions R50 both have a non-welding region R51 that is continuous in the transverse direction, the gas inside the single package 1 is more likely to flow out to the outside. This can more reliably suppress the expansion of the single package 1.

[0100] The welded region R50 only needs to have at least one non-welded region R51 that is continuous in the transverse direction. Figure 6 As shown in A, a plurality of non-welded regions R51 continuous in the transverse direction are intermittently arranged in the longitudinal direction, which makes it easier for the gas inside the individual package 1 to flow out to the outside. This can more reliably suppress the expansion of the individual package 1.

[0101] The single package 1 contains a volatile substance. For example, in the pad 10 of the present embodiment, a cooling agent 71 corresponding to a volatile substance is applied to the non-skin side surface of the front sheet 11. Fragrances 72 corresponding to volatile substances are applied to the inner side surface of the first skin side core wrap 32 at a portion where the first skin side core wrap 32 is folded toward the non-skin side. The volatile substance corresponds to a solvent contained in a hot melt adhesive that fixes the release sheet 60 to the packaging member 20 and joins the materials constituting the pad 10.

[0102] In this case, the volatile substances (volatile gases) fill the interior of the single package 1, and the internal pressure of the single package 1 is increased accordingly. This makes it less likely that external humid air will flow in. On the other hand, in the case where the single package 1 contains volatile substances, the sequential volatilization of the gas makes the single package 1 easier to expand. However, in the pad 10 of the present embodiment, the volatile substances can be released through the non-welded area R51 (gas channel). That is, the volatile substances inside the single package 1 are released from the non-welded area R51, which makes it less likely that external humid air will flow into the single package 1 through the non-welded area R51 while suppressing the expansion of the single package 1. As a result, the single package 1 can be prevented from rupturing, and the absorption performance of the pad 10 can be suppressed from deteriorating before use due to the high absorbency polymer in the pad 10 absorbing and retaining moisture from humid air.

[0103] As described above, according to the individual package 1 of the present embodiment, it is possible to suppress expansion of the individual package 1 while ensuring the absorption performance of the pad 10 .

[0104] Here, a method of measuring the "water absorption" and "water retention" of the pad 10 will be described. In the present embodiment, the "water retention" refers to the amount of water that can be retained even when the pad 10 is dehydrated at 150G.

[0105] In this measurement method, first, the weight A0 (g) of the target pad 10 is measured. Thereafter, the pad 10 with the skin side surface facing downward is pressed by hand and immersed in approximately 20L of saline (0.9% NaCl solution). The saline can be used to measure up to 6 pads 10. Using more than 6 pads causes the concentration of the saline to change, and the saline needs to be replaced. After the pad 10 is immersed, the pad 10 in this state is left for 30 minutes. After 30 minutes, the pad 10 is taken out and placed on the net with the skin side surface of the pad 10 facing downward. Then, on the pad 10 in this state, an acrylic plate and two 5kg weights are placed, and the pad 10 is then left for 20 minutes. After 20 minutes, the weight A1 (g) of the pad 10 is measured. The difference between the measured weight A1 and the initial weight is defined as the "water absorption" (A1 (g) - A0 (g)).

[0106] Next, the pad 10 subjected to the above treatment to obtain the water absorption amount is placed in a dehydrator. The pad 10 is set with its skin-side surface facing outward and dehydrated at 150G for 90 seconds. The number of pads 10 set in the dehydrator at the same time is limited to 3, and the pads are arranged in a manner that does not overlap each other. After dehydration, the weight A2 (g) of the pad 10 is measured. The difference between the measured weight A2 and the initial weight is defined as the "water retention amount" (A2 (g) - A0 (g)).

[0107] It is preferable to measure the water absorption and water retention of a plurality of pads 10. In this case, an average value of the water absorption and the average value of the water retention of a plurality of pads 10 is adopted.

[0108] The water vapor transmission rate (moisture permeability) of the packaging member 20 was measured based on the test method for determining the water vapor transmission rate of moisture-proof packaging materials (Dish method) of JIS Z 0208:1976. The measurement was performed as follows: a moisture permeability cup was filled with 20cc of water instead of calcium chloride, and covered with the target packaging member 20; the packaging member 20 was left to stand for 24 hours under the atmospheric conditions of a temperature of 40°C and a relative humidity of 60%; and the moisture permeability per unit area (m 2 ) of water permeation (discharge).

[0109] The weld 50 of the present embodiment is welded over its entire area. Therefore, the bonding strength of the packaging member 20 at the weld 50 is high. Therefore, in the single package 1 of the present embodiment, the volatile substance increases the internal pressure, but the accidental release of the weld 50 (weld area R50) before using the single package 1 can be prevented. This can ensure the airtightness of the single package 1. In the weld 50, the weld strength can be uniform, or it can be a mixture of parts with different weld strengths.

[0110] However, in addition to the actual welded portion, the welded portion 50 also includes a portion where the packaging member 20 is joined (integrated) together due to the influence of the adjacent welded portion, and a portion where most of the periphery is surrounded by the welded portion. Since gas is unlikely to pass through the above-mentioned portion included in the welded portion 50, the area including such a portion is defined as the welded portion 50, and the non-welded region R51 other than the welded portion 50 is defined as a gas passage. This can suppress the expansion of the single package 1.

[0111] Examples of volatile substances contained in the single package 1 of the present embodiment include cooling agents 71 (such as menthol and menthyl lactate), fragrances 72 and hot melt adhesives, but the volatile substances are not particularly limited thereto. For example, warming agents, insect repellents, Chinese herbal medicines, skin astringents, anti-inflammatory agents, antibacterial agents, pH regulators and moisturizers can be used. Volatile substances can be used to add predetermined functions (such as cooling or fragrance) to the pad 10 (absorbent article), or volatile substances like hot melt adhesives can be included to constitute a single package 1. In the case where the single package 1 contains a volatile substance for adding a predetermined function to the pad 10, as described above, the moisture permeability of the packaging member 20 is reduced or the airtightness of the unsealed end 20a of the packaging member 20 is increased, which can moderately suppress the volatilization of the volatile substance (leakage of volatile gas). Therefore, the function of the volatile substance is exerted during the use of the pad 10.

[0112] Preferably, the packaging member 20 has an oxygen permeability of 100 cc / m2 in the thickness direction at 23°C. 2 / 24h / atm or less. Preferably, the oxygen permeability is 60cc / m 2 / day / atm or less, more preferably 40cc / m 2 / 24h / atm or less, even more preferably 30cc / m 2 / 24h / atm or less.

[0113] The oxygen permeability is measured by the coulometric method under the conditions of 23° C. and 0% RH.

[0114] In this case, the oxygen permeability is greater than 100cc / m when used at 23°C. 2 / 24h / atm packaging member 20, the airtightness of the single packaging body 1 is increased, which makes it less likely that humid air will penetrate the packaging member 20. This can suppress the deterioration of the absorption performance of the pad 10. In the case where the single packaging body 1 contains a volatile substance for adding a predetermined function (such as a cool feeling and a fragrance) to the pad 10, the volatilization of the volatile substance (leakage of volatile gas) can be moderately suppressed. Therefore, the function of the volatile substance is exerted during the use of the pad 10.

[0115] Oxygen permeability at 23°C is 100cc / m 2 An example of the packing member 20 having a temperature of / 24h / atm or less includes a sheet having an airtight layer provided between welding layers containing a welding material capable of welding the packing members 20 together.

[0116] The airtight layer may be made of any material known in the art without limitation, as long as airtightness in the thickness direction can be maintained. Examples of such materials include ethylene-vinyl alcohol copolymers, vinylidene chloride-based polymers such as vinylidene chloride-methyl acrylate copolymers, polyvinyl alcohol, nylons such as nylon 6, aluminum foil, and base films (such as polyethylene terephthalate) on which aluminum oxide, silicon dioxide, etc. have been vapor-deposited.

[0117] The welding layer can be made of any material known in the art without limitation, as long as the welding portion 50 can be formed. Examples of such materials include polyethylene and polypropylene. However, it is not limited thereto, and the packaging member 20 only needs to contain a material capable of forming the welding portion 50 and have a thickness of 2000 g / m 2 · Moisture permeability of 24h or less. For example, a polyethylene (PE) resin film without an airtight layer may be used.

[0118] like Figure 1 and Figure 2 As shown, at a position between a pair of welded regions R50, it is preferred that the unsealed end portion 20a of the packaging member 20 has an adhesion region 2 adhered to the opposite portion (the end portion 20b on the other side in the length direction) of the packaging member 20. That is, it is preferred that the inner surface of the unsealed end portion 20a of the packaging member 20 is adhered to the outer surface of the end portion 20b on the other side in the length direction as the opposite portion of the packaging member 20 using an adhesive such as a hot melt adhesive.

[0119] Therefore, the airtightness of the unsealed end 20a of the packaging member 20 is increased, which can suppress the inflow of external humid air from the unsealed end 20a. This can suppress the deterioration of the absorption performance of the pad 10 caused by the high absorbent polymer in the pad 10 absorbing and retaining moisture from humid air. In the case where the single packaging body 1 contains a volatile substance for adding a predetermined function (such as a cool feeling and a fragrance) to the pad 10, the volatilization of the volatile substance (leakage of volatile gas) can be moderately suppressed. Therefore, the function of the volatile substance is exerted during the use of the pad 10.

[0120] It is preferable that at least one of the pair of fusion-bonded regions R50 has a region overlapping with the adhesion region 2 in the thickness direction.

[0121] As a result, in the lateral side edge portion of the single package 1, the packaging member 20 is more firmly joined by the weld 50 and the adhesive region 2, which increases the airtightness of the single package 1. It is also possible to suppress accidental unsealing before using the pad 10, and the airtightness at the unsealed end 20a of the packaging member 20 can be ensured.

[0122] The unsealed end portion 20a of the packaging member 20 is located on the unsealed end 20a1 side in the longitudinal direction relative to the adhesive region 2 (at Figure 1 and Figure 2 The lower side in the middle has a non-adhesive region N20. In the non-adhesive region N20, the packaging member 20 is not adhered to the opposite portion of the packaging member 20. As a result, curling easily occurs during circulation and being carried by the user.

[0123] Then, according to Figure 7 In the single package 1 of the modified example shown, the single package 1 may have a fastening tape 3 that fastens the non-adhesive region N20 to the packaging member 20. As a result, the fastening tape 3 can suppress the curling of the non-adhesive region N20. This can prevent the unsealed end 20a of the packaging member 20 from being accidentally unsealed due to curling.

[0124] The adhesion region 2 only needs to be provided at a position between a pair of welded regions R50, which increases the airtightness of the single package body 1. Figure 1 As shown, it is preferred that the adhesion region 2 is continuously arranged over the entire lateral region between a pair of welded regions R50. Figure 7 As shown, even when the fastening tape 3 is provided, it is preferable that the adhesion region 2 is provided continuously over the entire widthwise region between the pair of welded regions R50.

[0125] As a result, the airtightness of the single package 1 is increased more, which can suppress the deterioration of the absorption performance of the pad 10 due to humid air. The volatilization (leakage) of the volatile substance for adding a predetermined function (such as a cool feeling and a fragrance) to the pad 10 can be appropriately suppressed. Therefore, the function of the volatile substance is exerted during the use of the pad 10.

[0126] Likewise, the adhesion region 2 may overlap only one of the pair of welded regions R50, or may overlap only a portion of the welded region R50 in the lateral direction. However, it is preferred that the adhesion region 2 is continuously provided over the entire lateral direction of the pair of welded regions R50 on both welded regions of the pair of welded regions R50.

[0127] As a result, the packaging member 20 is more firmly joined in the weld region R50 , which can increase the airtightness of the individual packaging body 1 and also suppress accidental opening.

[0128] Although not shown, in the case where the adhesion region 2 is intermittently formed depending on the positions of the fusion region R50 and the fastening tape 3, the adhesion region 2 needs to be formed in the packaging member 20 in consideration of their positions (e.g., by observing with a camera, by selecting an appropriate time, etc.). Figure 1 As shown, when the adhesive region 2 is formed continuously from one end of the individual package 1 to the other end of the individual package 1, it is not necessary to consider the position of the weld region R50, etc. This can simplify the manufacturing steps of the individual package 1.

[0129] However, it is not limited thereto. For example, a single package 1 may have only the fastening tape 3 without the adhesive region 2, or need not have both the adhesive region 2 and the fastening tape 3.

[0130] It is preferred that the volatile substance contained in the single package body 1 is applied to at least one of the material constituting the pad 10 and the inner surface of the packaging member 20. In the present embodiment, the cooling agent 71 and the fragrance 72 are applied to the material constituting the pad 10. The hot melt adhesive applied to the respective materials is used to: adhere the material constituting the pad 10; form the non-slip adhesive portion 18; and form the fixing portion 61 for fixing the release sheet 60 to the packaging member 20.

[0131] As described above, since the volatile substance is coated on the pad 10 and the packaging member 20, the volatile substance gradually evaporates from the pad 10 and the packaging member 20, compared with, for example, the case where the volatile substance is simply enclosed when the individual packaging body 1 is folded. This increases the persistence of the volatile substance. This also maintains the effect of suppressing the inflow of humid air caused by the volatile substance increasing the internal pressure of the individual packaging body 1. As a result, even when the individual packaging body 1 has been circulated or stored for a long period of time, the deterioration of the absorption performance of the pad 10 can be suppressed.

[0132] Menthone glycerol acetal is known as a cooling agent. In the present embodiment, cooling agents 71 each having higher volatility than menthone glycerol acetal (MGA), such as menthol and menthyl lactate, are employed as volatile substances contained in the individual package 1 .

[0133] Therefore, compared with the case where the single package 1 contains MGA, volatilization of volatile substances proceeds at a relatively early stage, which increases the internal pressure of the single package 1. This can suppress the inflow of humid air. Therefore, it is possible to suppress the absorption performance of the pad 10 from deteriorating before use.

[0134] However, contrary to the above configuration, a substance having lower volatility than menthone glyceryl acetal (MGA), such as vanillyl butyl ether (VBE) used as a warming agent, may be adopted as the volatile substance contained in the single package 1 .

[0135] Therefore, compared with the case where the single package 1 contains MGA, the persistence of volatile substances increases, which maintains the effect of suppressing the inflow of humid air. As a result, even when the single package 1 has been circulated or stored for a long period of time, the absorption performance of the pad 10 can be suppressed from deteriorating.

[0136] The volatile substance contained in the single package 1 and having lower or higher volatility than MGA may be a cooling agent or a substance having a different function such as a fragrance and an adhesive. Both substances having higher volatility than MGA and substances having lower volatility than MGA may be used.

[0137] The volatile substances contained in the single package 1 may be of one type or of multiple types. In the case of multiple types of volatile substances, the volatile substances may exert different functions (such as cooling agents and fragrances) or exert the same function (such as two types of cooling agents). The single package 1 preferably contains two types of volatile substances with different volatilities (it may be two types of volatile substances that exert different functions, or two types of volatile substances that exert the same function). As a result, the high-volatile substance increases the internal pressure of the single package 1 at a relatively early stage, which can suppress the inflow of humid air. In addition, the low-volatile substance increases the internal pressure of the single package 1, which can maintain the effect of suppressing the inflow of humid air.

[0138] As described above, each welded region R50 has a non-welded region R51, and each non-welded region R51 continuously extends from an end edge on one lateral side of the welded region R50 to an end edge on the other lateral side. Figure 6 As shown in A, the non-welded regions R51 extend continuously (linearly) in the lateral direction.

[0139] That is, it is preferable that there is a non-welded region R51 whose position is aligned in the longitudinal direction over the entire lateral region of the welded region R50. As a result, the gas inside the individual package 1, especially the volatile substances (cooling agent 71, fragrance 72, etc.) can flow out smoothly in the lateral direction without colliding with the welded portion 50. Therefore, the gas (volatile substances) inside the individual package 1 can be appropriately released, which can suppress the expansion and rupture of the individual package 1.

[0140] However, this is not limited to this. For example, Figure 6 As shown in FIG. 2B , the position of the weld 50 arranged in the transverse direction of the single package 1 can be shifted in the longitudinal direction, so the weld 50 can be arranged in a staggered manner. In this case, when the gas (volatile substances 71, 72) collides with the weld 50 while moving through the non-weld region R51 in the transverse direction, the gas can flow to the outside while passing through the non-weld region R51 adjacent to the weld 50 on both sides of the longitudinal direction of the weld 50. That is, the non-weld region R51 can be continuous from the end edge of one transverse side of the weld region R50 to the end edge of the other transverse side while meandering in the longitudinal direction. Even in this case, the expansion and rupture of the single package 1 can be suppressed.

[0141] like Figure 6 As shown in Figure A, preferably, the longitudinal length L2 of each non-welding region R51 that is continuous in the transverse direction (that is, the interval L2 at which the welded portion 50 is arranged in the longitudinal direction) is longer than 1 / 2 of the longitudinal length L1 of each welded portion 50 adjacent to the non-welding region R51 on one longitudinal side (upper or lower side) (L2>L1 / 2). More preferably, the longitudinal length L2 of each non-welding region R51 is equal to or greater than the longitudinal length L1 of each welded portion 50 (L2≥L1).

[0142] As a result, it is possible to prevent the gas (volatile substances 71, 72) from being difficult to flow out due to the longitudinal length L2 of each non-welded region R51 (gas channel) being too small. That is, the gas can flow out of the single package 1 moderately, which can suppress the expansion and rupture of the single package 1. However, it is not limited to this. For example, the longitudinal length L2 of each non-welded region R51 can be longer than 1 / 2 of the minimum longitudinal length L1 of the multiple welded portions 50 in the welded region R50.

[0143] On the other hand, preferably, the longitudinal length L2 of each non-welding region R51 is less than 3 times the longitudinal length L1 of each welding portion 50 adjacent to the non-welding region R51 on one longitudinal side (upper or lower side), and more preferably less than 2 times the longitudinal length L1.

[0144] Therefore, compared with the case where the longitudinal length L2 of each non-welding region R51 is greater than 3 times the longitudinal length L1 of each welding portion 50, the longitudinal length L2 of each non-welding region R51 (gas channel) will not be too large, which can prevent external humid air from easily flowing in. This can ensure the absorption performance of the pad 10. The evaporation (leakage of volatile gas) of volatile substances (such as cooling agents 71 and fragrances 72) used to add predetermined functions to the pad 10 can be appropriately suppressed. This can make the volatile substances work during the use of the pad 10. However, it is not limited to this. For example, the longitudinal length L2 of the non-welding region R51 can be equal to or less than 3 times the maximum longitudinal length L1 of the multiple welding portions 50 in the welding region R50.

[0145] In at least one of the pair of welded regions R50, it is preferred that the total area of ​​the welded portion 50 provided in at least one of the pair of welded regions R50 is less than 1 / 2 of the area of ​​at least one of the pair of welded regions R50. That is, it is preferred that more than half of the welded region R50 is defined as a non-welded region (region outside the welded portion 50). Therefore, compared with the case where the non-welded region is less than half of the welded region R50, the gas (volatile substances 71, 72) can flow to the outside from the non-welded region moderately. This can suppress the expansion and rupture of the single package 1.

[0146] Specifically, in the present embodiment, the longitudinal length L1 of each weld 50 is set to about 0.3 mm to 0.7 mm, and the longitudinal length L2 of each non-weld region R51 is set to about 0.5 mm to 1.4 mm. However, the sizes of the weld 50 and the non-weld region R51 are not particularly limited thereto.

[0147] Figure 6 A and Figure 6 The shape, number and arrangement of the weld 50 shown in B are merely examples and are not limiting. For example, the shape of each weld 50 is not limited to a square, but may be a circle, an ellipse, a rectangle or any other shape. The number of rows of the welds 50 arranged in the longitudinal direction is not limited to 5, but only requires that the number of rows be 1 or more.

[0148] exist Figure 6 In the embodiment of the present invention, in the weld region R50, welded portions 50 having the same shape and size are arranged at predetermined intervals, but are not limited thereto. For example, each weld region R50 may have welded portions 50 having a variety of shapes and sizes, and the arrangement interval of the welded portions 50 (that is, the longitudinal length of each non-welded region R51) does not need to be constant.

[0149] Therefore, the weld region R50 is only required to have at least one non-weld region R51 that is continuous in the transverse direction from the end edge on one side of the weld region R50 to the end edge on the other side of the weld region R50. In this case, the above-mentioned effects can be obtained.

[0150] In addition, the welded region R50 is only required to have at least one non-welded region R51 having a longitudinal length L2 longer than 1 / 2 of the longitudinal length L1 of the welded portion 50 adjacent to the non-welded region R51, or at least one non-welded region R51 having a longitudinal length L2 2 to 3 times or less than the longitudinal length L1 of the welded portion 50 adjacent to the non-welded region R51. In this case, the above-mentioned effect can be obtained.

[0151] In the pad 10, it is preferable that an oil agent is placed on the skin side relative to the absorbent core (the first absorbent core 31 and the second absorbent core 41). Figure 8 In the pad 10 shown, a pattern visible through the front sheet 11 is printed on the intermediate sheet 12. The intermediate sheet 12 has a printing ink PI used as an oil. In addition, a layer of oil can be formed by applying an oil that controls liquid permeability to the front sheet 11 and the intermediate sheet 12 arranged on the skin side relative to the absorbent cores 31 and 41. Examples of the oil include monotriglycerides, diglycerides and triglycerides, esters such as fatty acid esters, hydrocarbons such as petrolatum, and higher alcohols such as stearyl alcohol.

[0152] Since the oil agent is provided on the skin side relative to the absorbent cores 31 and 41, the moist air that has flowed into the single package body 1 is less likely to permeate the oil agent layer and is less likely to reach the absorbent cores 31 and 41. Therefore, it is possible to suppress the water-absorbent resin contained in the absorbent cores 31 and 41 from absorbing moisture from the moist air. This can ensure the absorption performance of the pad 10. The oil agent layer makes it less likely that volatile substances such as the cooling agent 71 and the like will directly contact the wearer, which can reduce irritation to the wearer.

[0153] Preferably, the smoothness of the outer surface of the packaging member 20 is lower than the smoothness of the inner surface of the packaging member 20. In this case, the concavoconvexity on the outer surface of the packaging member 20 is large, resulting in a high friction coefficient. Therefore, the movement of the individual packaging body 1 can be reduced during the circulation of the individual packaging body 1 and the period when it is carried by the user. As a result, the curling and accidental opening of the unsealed end 20a of the packaging member 20 can be prevented, thereby suppressing the flow of humid air into the individual packaging body 1. This can ensure the absorption performance of the pad 10.

[0154] However, in contrast to the above configuration, the smoothness of the inner surface of the packaging member 20 may be lower (its friction coefficient may be higher) than the smoothness of the outer surface of the packaging member 20. In this case, the concavoconvex on the inner surface of the packaging member 20 becomes larger, so that volatile substances (volatile gases) are easy to fill the concave parts in such concavoconvex inner surface. The volatile substances fill the space near the outside of the single packaging body 1 as described above, which can further inhibit the flow of humid air into the single packaging body 1. This can ensure the absorption performance of the pad 10.

[0155] The level of smoothness of the packaging member 20 can be determined based on the static friction coefficient on both sides of the packaging member 20. The static friction coefficient can be measured according to JIS P8147 (b), horizontal plane method. When measuring the static friction coefficient, the friction cotton cloth "Kanakin No. 3" specified in JIS L0803 is used as a horizontal plate test piece, and a low friction material is used as a weight test piece.

[0156] Preferably, the pad 10 has a concave portion that is at least partially concave in the thickness direction of the pad 10. The pad 10 of this embodiment has a compressed portion 19 where the pad 10 is compressed in the thickness direction thereof. Figure 3 As shown. In each compression part 19, only at least a portion of the absorbent core 31 and the absorbent core 41 needs to be compressed. Each compression part 19 of this embodiment compresses from the front sheet 11 to the second absorbent body 40 from the skin side. This can suppress the distortion of the absorbent cores 31 and 41, thereby improving the diffusion capacity of the excrement liquid.

[0157] The depressed portion is not limited to the compressed portion 19, but may be a material of the basis weight (g / m 2 ) is a slit or low-weight portion having a basis weight lower than that of the surrounding area. In the pad 10 of this embodiment, the first absorbent core 31 has a slit 34, such as Figure 5 shown.

[0158] Since the pad 10 has the concave parts such as the compressed part 19 and the slit 34, the volatile substance easily fills the concave parts. Since the volatile substance fills the space around the absorbent cores 31 and 41, moist air is less likely to flow into the space around the absorbent cores 31 and 41. As a result, the absorption performance of the pad 10 is ensured.

[0159] like Figure 3 As shown, preferably, the recessed portions in the pad 10 are extended in the length direction like the compressed portion 191 of this embodiment, and are arranged on both lateral sides of the pad 10 .

[0160] Therefore, volatile substances easily fill the compressed parts 191 of both lateral sides of the pad 10, which makes it less likely that humid air flows into the lateral center of the pad 10. As a result, the absorption performance is ensured in the lateral center of the pad 10 as the part where the excrement liquid is most excreted.

[0161] Furthermore, the pad 10 has a pair of compressed portions 192 extending in the lateral direction and provided at both ends in the length direction of the pad 10. Therefore, the volatile substance easily fills the compressed portions 192, which makes it difficult for moist air to flow into the longitudinal center portion of the pad 10. As a result, the absorption performance is ensured even in the longitudinal center portion of the pad 10, which is the portion where the excrement liquid is most excreted.

[0162] However, there is no limitation on the shape of the recessed portion such as the compressed portion 19 .

[0163] It is preferred that the pad 10 includes a material containing cellulose fibers (such as pulp fibers) on at least one side of the skin side and the non-skin side relative to the absorbent core 31, 41 containing a water-absorbent resin (here, a superabsorbent polymer). For example, in the pad 10 of the present embodiment, the second skin-side core wrap 42 and the second non-skin-side core wrap 43 correspond to tissue paper containing cellulose fibers.

[0164] Compared with water-absorbent resin, cellulose fiber has lower water absorption and lower water retention, but has a faster liquid absorption rate. Therefore, cellulose fiber is arranged outside the absorbent core 31, 41 in the thickness direction, which makes it easier for cellulose fiber to absorb moisture from humid air. As a result, humid air is less likely to flow into the absorbent core 31, 41. This ensures the absorption performance of the pad 10.

[0165] like Figure 3 As shown, preferably, in at least a portion of the outer edge of the pad 10, a circular sealing portion 1R is formed by welding the following sheets: a skin side sheet (here, the front sheet 11, the first side sheet 13, etc.) located on the skin side relative to the absorbent core 31, 41; and a non-skin side sheet (here, the back sheet 16, etc.) located on the non-skin side relative to the absorbent core 31, 41.

[0166] In the circular seal portion 1R, the thickness of the pad 10 is thinner than that in the surrounding area, which makes it easy to form a space between the circular seal portion 1R and the packaging member 20. Such a space formed around the pad 10 near the outside of the individual packaging body 1 is easy to be filled with volatile substances, making it less likely that humid air will flow into the pad 10. As a result, the absorption performance of the pad 10 is ensured.

[0167] like Figure 1As shown, the transverse length X1 refers to the length from the inner end of one transverse side of the weld region R50 to the end of one transverse side of the pad 10, and the transverse length X2 refers to the length from the inner end of the other transverse side of the weld region R50 to the end of the other transverse side of the pad 10. The sum of the transverse length X1 and the transverse length X2 is expressed as "X1+X2". Preferably, the sum "X1+X2" is shorter than the transverse length X3 (X1+X2) which is the maximum length of the pad 10 in the transverse direction. <X3)。

[0168] This prevents the space between the pad 10 and the welded region R50 from becoming too large, making it easy for the volatile substance to fill such space. As a result, moist air is less likely to flow into the individual packaging body 1. This ensures the absorption performance of the pad 10.

[0169] In the single package 1 of this embodiment, as Figure 4 As shown, the release sheet 60 is provided between the pad 10 and the packaging member 20. The pad 10 is folded with its skin-side surface facing inward, that is, with the release sheet 60 facing outward.

[0170] Therefore, the peeling sheet 60 can inhibit the humid air from flowing into the pad 10, which makes it less likely that the water-absorbent resin in the pad 10 absorbs moisture from the humid air. This can ensure the absorption performance of the pad 10. However, it is not limited to this. For example, the pad 10 can be directly attached to the packaging member 20 by applying a peelable treatment on the inner surface of the packaging member 20.

[0171] It is also preferred that a portion of the volatile substances contained in the single package 1 is encapsulated in a microcapsule. The microcapsule is a capsule having a diameter of 1 μm to 1,000 μm and having a space for encapsulating volatile substances (such as cooling agents 71 and fragrances 72) in a core material. For example, the microcapsule can release the volatile substances by: collapse when in contact with water (liquids such as sweat or urine); or by physical pressure (impact, friction, etc.). The shape of the capsule is not particularly limited, and examples of the shape include spherical and amorphous shapes, etc. In addition, the capsule may be a single-core capsule having a single space for holding a core material, or a multi-core capsule having multiple spaces for holding a core material.

[0172] A part of the volatile substance is encapsulated in the microcapsule, and the volatile substance not encapsulated in the microcapsule is therefore volatilized at a relatively early stage, which can increase the internal pressure of the single package 1. This can suppress the inflow of humid air. On the other hand, the volatile substance encapsulated in the microcapsule is volatilized at a relatively late stage, which can increase the internal pressure of the single package 1. This can maintain the effect of suppressing the inflow of humid air. However, it is not limited to this. The volatile substance does not have to be encapsulated in the microcapsule.

[0173] ===Package 90 of Single Package 1===

[0174] Fig. 9 A and Fig. 9 B is an explanatory diagram illustrating a method of measuring a thickness variation of a single package 1 . Fig.10 A to Fig.10 C is an explanatory diagram illustrating a method of measuring a thickness variation of a package 90. The individual package 1 may be circulated in the form of a package 90 in which one or more individual packages 1 are contained in a bag 91, such as Fig.10 A. In the package 90, a plurality of individual packages 1 are stacked in the thickness direction and housed inside the bag 91. In the package 90, the direction in which the plurality of individual packages 1 are arranged is referred to as a stacking direction (predetermined direction). Fig.10 The stacking manner of the individual packages 1 shown in A is an example and is not limited thereto. For example, the individual packages 1 may be in one row instead of two rows.

[0175] Since the volatile material is contained in the single package 1, the volatile material flowing out of the single package 1 fills the bag 91 of the package 90. Therefore, the internal pressure of the bag 91 increases, making it less likely that humid air will flow into the bag 91. As a result, humid air is less likely to flow into the single package 1. This ensures the absorption performance of the pad 10. However, when the volatile material excessively fills the bag 91, the bag 91 expands and breaks. Therefore, the bag 91 preferably has an opening for releasing the volatile material. For example, it is preferably provided with a perforation 92 (intermittent opening) for opening the bag 91 by the user. As a result, not only can the user easily unseal the bag 91, but the volatile material can be released to the outside of the bag 91 through the opening of the perforation 92, thereby suppressing the expansion of the bag 91. The opening for releasing the volatile material to the outside is not limited to the perforation 92, but can be, for example, a cutout used as the starting point for unsealing the bag 91, or an opening independently provided from the part used as the starting point for unsealing the bag 91.

[0176] When comparing the thickness variation rates of the individual package body 1 and the package 90 in a natural state and in a pressurized state, it is preferred that the thickness variation rate of the individual package body 1 is greater than the thickness variation rate of the package 90 .

[0177] Specifically, Fig. 9 As shown in A, t1 refers to the length in the thickness direction of a single package 1 in a natural state (unpressurized state). Fig. 9 As shown in B, t2 refers to when a single package 1 is subjected to a load of 1000 N / m 2 The length in the thickness direction of the single package 1 when the force is pressed in the stacking direction. In this case, the value "(t1-t2) / t1" obtained by dividing the thickness change by the thickness in the natural state (initial state) is defined as the thickness change rate of the single package 1.

[0178] Likewise, if Fig.10 As shown in FIG. 1B , T1 refers to the length of the package 90 in the stacking direction in a natural state (unpressurized state). Fig.10 As shown in C, T2 refers to when the package is 90 with 1000N / m 2 The length of the package 90 in the stacking direction when the force is pressed in the stacking direction. In this case, the value "(T1-T2) / T1" obtained by dividing the thickness change by the thickness in the natural state (initial state) is defined as the thickness change rate of the package 90.

[0179] The thickness variation rate of the single package 1 is greater than that of the package 90, that is, the expression "(T1-T2) / T1<(t1-t2) / t1" is satisfied. This means that the internal gas of the single package 1 is easier to flow out than the internal gas of the package 90. Compared with the package 90, the single package 1 in which the volatile substance is directly contained is easier to expand and then rupture due to the volatile substance. Therefore, in the single package 1, the volatile substance is more easily released to the outside than in the package 90, which can more reliably suppress the expansion of the single package 1. On the contrary, in the package 90, even when the opening of the perforation 92 is unnecessarily increased, the risk of expansion of the package 90 is small. Therefore, the opening of the perforation 92 can be set as small as possible, which makes it less likely that external humid air will flow in. This ensures the absorption performance of the pad 10.

[0180] A method of measuring the thickness of the individual packaging bodies 1 and the package 90 will be described below.

[0181] First, prepare an acrylic plate and a weight 81. The acrylic plate 80 is larger than the plane perpendicular to the thickness direction of the single package 1 and the plane perpendicular to the stacking direction of the package 90. Adjustment is performed so that 1000 N / m corresponding to the total weight of the acrylic plate 80 and the weight 81 is 2 A force is applied to the individual packages 1 and the packages 90.

[0182] Next, if Fig. 9 As shown in A, the single package 1 is placed on a horizontal test bench in such a way that the plane of the single package 1 is along the horizontal test bench. The thickness (maximum thickness) t1 of the single package 1 in a natural state is measured using a ruler or the like. Then, as Fig. 9 As shown in FIG. 1B , an acrylic plate 80 is placed on the upper surface of the single package 1, and a weight 81 is placed on the acrylic plate 80. After 10 seconds have passed since the force was applied to the entire plane of the single package 1, the thickness (maximum thickness) t2 of the single package 1 is measured. The thickness change rate of the single package 1 is calculated based on the measured thicknesses t1 and t2.

[0183] Likewise, if Fig.10As shown in FIG. 1B , the package 90 is placed on a horizontal test bench in such a manner that the stacking direction of the package 90 is oriented in the vertical direction. In this state, the thickness (maximum thickness) T1 of the package 90 in the natural state is measured. The thickness of the package 90 is the thickness of the portion where the single package body 1 is configured. Fig.10 As shown in C, 10 seconds after the acrylic plate 80 and the weight 81 are placed on the upper surface of the package 90, the thickness (maximum thickness) T2 of the package 90 is measured. The thickness change rate of the package 90 is calculated based on the measured thicknesses T1 and T2.

[0184] Although the embodiments of the present disclosure have been described above, the above embodiments of the present disclosure are only for facilitating the understanding of the present disclosure and are not to be interpreted as limiting the present disclosure in any way. Various changes or improvements may be made to the present disclosure without departing from the gist of the present disclosure, and their equivalents are included.

[0185] Description of Reference Numerals

[0186] 1 single package (absorbent article package),

[0187] 2 adhesive areas, 3 fastening straps,

[0188] 10 pads (absorbent articles),

[0189] 11 front piece, 12 middle piece, 13 first side piece,

[0190] 14 elastic thread, 15 second side piece, 16 back piece,

[0191] 18 Anti-slip adhesive part,

[0192] 20 packaging components,

[0193] 30 first absorbent body, 31 first absorbent core,

[0194] 32 first skin side core wrapping member, 33 first non-skin side core wrapping member,

[0195] 40 second absorbent body, 41 second absorbent core,

[0196] 42 second skin side core wrapping member, 43 second non-skin side core wrapping member,

[0197] 50 welding part,

[0198] R50 welding area, R51 non-welding area,

[0199] 60 peeling sheet, 61 fixing portion,

[0200] 71 cooling agent (volatile substance), 72 fragrance (volatile substance),

[0201] 80 acrylic board, 81 heavy objects,

[0202] 90 (Absorbent article packaging) packaging,

[0203] 91 bag body,

[0204] PI printing ink (oil)

Claims

1. An absorbent article package having a transverse direction, a longitudinal direction and a thickness direction, The absorbent article package comprises: An absorbent article comprising a water-absorbent resin; and Packaging components, In the absorbent article, a value obtained by dividing the water retention amount by the water absorption amount is 0.55 or more, and a moisture permeability of the packaging member is 2000 g / m 2 24h or less, The packaging member encloses the absorbent article, The packaging member is folded so that the unsealed end portion of the packaging member is located on the packaging member, The unsealed end portion extends along the transverse direction, a volatile substance contained in the absorbent article package, a pair of welded regions disposed in the pair of lateral side edges, At least one of the pair of welded regions has: a plurality of welds that intermittently join the packaging member; and The non-welded region is continuous from one end edge in the transverse direction to the other end edge in the transverse direction of at least one of the pair of welded regions.

2. The absorbent article package according to claim 1, wherein: The unsealed end portion of the packaging member has an adhered region adhered to an opposing portion of the packaging member at a position between the pair of welded regions.

3. The absorbent article package according to claim 2, wherein: The unsealed end portion of the packaging member has a non-adhesive region on the unsealed end side in the longitudinal direction of the packaging member relative to the adhesive region, and The absorbent article package has a fastening tape that fastens the non-adhesive region to the packaging member.

4. The absorbent article package according to claim 2 or 3, wherein: At least one of the pair of fusion-bonded regions has a region overlapping with the adhesion region in the thickness direction.

5. The absorbent article package according to any one of claims 1 to 3, wherein: The volatile substance is applied to at least one of a material constituting the absorbent article and an inner surface of the packaging member.

6. The absorbent article package according to any one of claims 1 to 3, wherein: At least one of the pair of welded regions has the non-welded region that is continuous in the transverse direction.

7. The absorbent article package according to claim 6, wherein: The length of the non-welded region in the longitudinal direction is greater than 1 / 2 of the length of the welded portion adjacent to the non-welded region on one side in the longitudinal direction.

8. The absorbent article package according to any one of claims 1 to 3, wherein: The volatility of the volatile substance is higher than that of menthone glycerol acetal.

9. The absorbent article package according to any one of claims 1 to 3, wherein: The volatility of the volatile material is lower than that of menthone glycerol acetal.

10. The absorbent article package according to any one of claims 1 to 3, wherein: The packaging member has an oxygen permeability of 100 cc / m in a thickness direction of the packaging member at 23°C. 2 / 24h / atm or less.

11. The absorbent article package according to any one of claims 1 to 3, wherein: The absorbent article has an absorbent core, and In the absorbent article, an oily agent is placed on the skin side with respect to the absorbent core.

12. The absorbent article package according to any one of claims 1 to 3, wherein: The smoothness on the outer surface of the packaging member is lower than the smoothness on the inner surface of the packaging member.

13. The absorbent article package according to any one of claims 1 to 3, wherein: The smoothness on the inner surface of the packaging member is lower than the smoothness on the outer surface of the packaging member.

14. A package for an absorbent article package, The package includes: The absorbent article package according to any one of claims 1 to 3 housed in a bag, The package has a predetermined direction corresponding to the thickness direction of the absorbent article package body inside the bag body, Satisfies the expression "(T1-T2) / T1<(t1-t2) / t1", T1 refers to the length of the package in the predetermined direction in a natural state, T2 refers to when the package is 1000N / m 2 When the force is pressed in the predetermined direction, the length of the package in the predetermined direction, t1 refers to the length of the absorbent article package in the natural state in the thickness direction. t2 refers to the time when the absorbent article package is subjected to 1000 N / m 2 The length of the absorbent article package in the thickness direction when the force is pressed in the thickness direction.

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