Shorts-type absorbent article

Abstract

This invention provides a shorts-type absorbent article that, when a highly fluid oily agent is disposed on the skin side closer to the back sheet (liquid-impermeable sheet), can suppress the functional degradation of other oily agents. The shorts-type absorbent article (1) comprises an absorbent body (3) and an outer body (5). The absorbent body comprises an absorbent core (27a), a skin-permeable side sheet (21) disposed on the skin side of the absorbent core, a liquid-impermeable sheet (29) disposed on the non-skin side of the absorbent core, and a first oily agent (41) disposed on the skin-permeable side sheet or the absorbent core. The absorbent body or outer body comprises a hydrophobic nonwoven sheet (35) disposed on the non-skin side of the liquid-impermeable sheet. The shorts-type absorbent article, when viewed from above in its unfolded state, comprises a second oily agent (143) disposed at least in a region that does not overlap with the first oily agent in the thickness direction and is disposed on the skin side closer to the skin side sheet or the non-skin side closer to the liquid-impermeable sheet.

Description

Technical Field

[0001] This disclosure relates to absorbent articles in the form of shorts. Background Technology

[0002] Absorbent articles containing oily agents are known. Examples of oily agents include modifiers that modify excrement, skin care agents that protect the skin, inks that depict images on absorbent articles, and adhesives that bond the components of absorbent articles together.

[0003] As a modifier, an example is the blood-lubricating agent contained in the absorbent article described in Patent Document 1. This absorbent article has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body between the liquid-permeable top sheet and the liquid-impermeable back sheet. The liquid-permeable top sheet has an uneven structure including protrusions and recesses on its skin-contact surface. Furthermore, the liquid-permeable top sheet is characterized in that, at least in the protrusions of the discharge port contact area, it contains a blood-lubricating agent with a thickness of 0.01 to 80 mm at 40°C. 2 Kinematic viscosity of / s, water retention of 0.01 to 4.0% by mass, and weight-average molecular weight of less than 1000.

[0004] As an example of ink, one can cite the ink containing a pattern in an absorbent article as described in Patent Document 2. This absorbent article includes a layer that contacts the body, a layer that contacts clothing, and an absorbent core disposed between the body-contacting layer and the clothing-contacting layer, having a core edge portion. The core edge portion defines a core region within the core edge portion and an outer region outside the core region. The body-contacting layer and the clothing-contacting layer extend outward to the outer region and are joined together within the outer region. The clothing-contacting layer has a pattern printed on its body-facing surface, at least in a portion of the outer region. The body-contacting layer has a first light transmittance such that the pattern printed on the body-facing surface of the clothing-contacting layer is visible through the body-contacting layer in the outer region.

[0005] As an adhesive, hot melt adhesives can be cited as an example.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: International Publication No. 2013 / 129236

[0009] Patent Document 2: Japanese Patent Application Publication No. 2005-523139 Utility Model Content

[0010] The problem to be solved by utility models

[0011] In Patent Document 2, the adhesive for the fastener used to place a sanitary napkin onto the wearer's underwear is disposed on the surface of the layer in contact with the clothing, i.e., the non-skin side of the back panel. Here, both the adhesive for the fastener and the ink for the graphic are oil-based. Therefore, when the ink comes into contact with the adhesive, it may dissolve into the adhesive; thus, the graphic is not disposed on the non-skin side of the back panel where the adhesive for the fastener is disposed, but rather on the skin side surface.

[0012] However, if a highly fluid oily agent, such as the blood-lubricating agent described in Patent Document 1, is applied to an absorbent article having this structure, the excrement absorbed by the absorbent body can easily reach the skin-side surface of the back sheet along with the blood-lubricating agent. Thus, the ink of the pattern disposed on the skin-side surface of the back sheet may be peeled off due to the blood-lubricating agent.

[0013] Furthermore, in absorbent items such as shorts, from the viewpoint of suppressing stuffiness, if the back panel is breathable, some of the oily agent reaching the back panel can easily pass through the back panel to the non-skin side. This could potentially reduce the adhesive strength of the adhesive applied to the non-skin side of the back panel.

[0014] Therefore, the purpose of this invention is to provide a shorts-type absorbent article that, even when a highly fluid oily agent (e.g., a modifier, a skin care agent) is applied to the skin-side surface of the back sheet or closer to the skin side than the back sheet, can suppress the reduction in the function of other oily agents (e.g., ink, adhesive) caused by the oily agent.

[0015] Methods for solving problems

[0016] The shorts-type absorbent article disclosed herein comprises an absorbent body and an outer body, wherein the shorts-type absorbent article, in its unfolded state, has mutually orthogonal length, width, and thickness directions. The absorbent body comprises: an absorbent core; a skin-side sheet disposed on the skin side of the absorbent core and having liquid permeability; a liquid-impermeable sheet disposed on the non-skin side of the absorbent core; and a first oily agent disposed on the skin-side sheet or the absorbent core. The absorbent body or the outer body comprises a hydrophobic nonwoven fabric sheet disposed on the non-skin side of the liquid-impermeable sheet. The shorts-type absorbent article has a second oily agent, which, when viewed from above in the unfolded state, is at least disposed in a region in the thickness direction that does not overlap with the first oily agent and is located closer to the skin side than the skin-side sheet or closer to the non-skin side than the liquid-impermeable sheet.

[0017] Preferably, the kinematic viscosity of the first oily agent is lower than that of the second oily agent.

[0018] Preferably, the liquid-impermeable sheet is moisture-permeable, the liquid-impermeable sheet has a pattern layer disposed on the non-skin side surface, and the second oily agent is ink contained in the pattern layer.

[0019] Preferably, the graphic layer is also disposed in the region that overlaps with the first oily agent in the thickness direction.

[0020] Preferably, the hydrophobic nonwoven sheet is bonded to the liquid-impermeable sheet using an adhesive in a manner that covers the non-skin side of the graphic layer.

[0021] Preferably, the adhesive used to bond the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is formed intermittently in the length direction and the width direction.

[0022] Preferably, the kinematic viscosity of the adhesive used to bond the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is higher than the kinematic viscosity of the ink.

[0023] Preferably, the hydrophobic nonwoven sheet comprises: a low-density layer located on the skin side of the surface opposite to the liquid-impermeable sheet; and a high-density layer located on the non-skin side of the sheet.

[0024] Preferably, the absorbent body has a main elastic member extending along the length direction, and at the center of the shorts-type absorbent article in the length direction, the first oily agent, the graphic layer, and the main elastic member overlap in the thickness direction.

[0025] Preferably, the outer body has a back elastic member disposed in the back region in the length direction and extending along the width direction. In the back region in the length direction of the shorts-type absorbent article, the first oily agent, the graphic layer, and the back elastic member overlap in the thickness direction.

[0026] Preferably, the absorbent core has a pair of thin-walled portions extending along the length direction and spaced apart in the width direction, and the first oily agent, the graphic layer, and the pair of thin-walled portions overlap in the thickness direction at the center of the shorts-type absorbent article in the width direction.

[0027] Preferably, the second oily agent is an adhesive that bonds the components of the shorts-type absorbent article together.

[0028] Preferably, the impermeable sheet is permeable to moisture, and the adhesive is an outer casing adhesive that bonds the absorbent body and the outer casing.

[0029] Preferably, the outer body adhesive is formed intermittently in the length direction and the width direction.

[0030] Preferably, the dimension in the width direction of the region where the outer body adhesive is formed is larger than the dimension in the width direction of the region where the first oily agent is formed.

[0031] Preferably, the outer body adhesive is also disposed in the region that overlaps with the first oily agent in the thickness direction.

[0032] Preferably, the outer casing includes the hydrophobic nonwoven fabric sheet, which comprises: a low-density layer located on the skin side of the surface opposite to the liquid-impermeable sheet; and a high-density layer located on the non-skin side of the outer casing compared to the low-density layer.

[0033] Preferably, the absorbent body further comprises a pair of side pieces disposed on both sides of the skin side piece in the width direction and extending along the length direction, and the adhesive is a side adhesive for joining the pair of side pieces.

[0034] Preferably, the first oily agent is disposed in such a way that it is exposed on the surface of the skin side of the skin side sheet, and the side adhesive is disposed at a position away from the inner edge of the side sheet in the width direction, in such a way that it is not exposed on the surface of the skin side of the skin side sheet.

[0035] Preferably, the pair of side panels each includes a leak-proof wall formed on the inner side in the width direction and extending along the length direction. The leak-proof wall includes a pair of end joints at both ends in the length direction, which are joined to the absorbent body by an end adhesive used as the side adhesive. The first oily agent is disposed at a position closer to the center side in both the length and width directions than the end adhesive.

[0036] Preferably, the absorbent body has a pair of leak-proof walls disposed at both ends in the width direction and extending along the length direction, and the adhesive is a leak-proof wall adhesive that bonds the leak-proof wall elastic components to the pair of leak-proof walls respectively.

[0037] Utility Model Effect

[0038] The shorts-type absorbent article disclosed herein can suppress the reduction of the function of other oily agents caused by the oily agent, even when the highly fluid oily agent is disposed on the skin side of the back sheet or closer to the skin side than the back sheet. Attached Figure Description

[0039] Figure 1 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0040] Figure 2 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0041] Figure 3 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0042] Figure 4 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0043] Figure 5 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0044] Figure 6 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0045] Figure 7 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0046] Figure 8 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0047] Figure 9 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0048] Figure 10 This is a diagram illustrating the shorts-type sanitary napkin 1 of the first embodiment.

[0049] Explanation of reference numerals in the attached figures

[0050] 1. Panty-style sanitary napkin

[0051] 3 Absorbent Subjects

[0052] 5 outer body

[0053] 21 films

[0054] 27 absorbers

[0055] 27a absorber core

[0056] 27b core cladding

[0057] 35 Hydrophobic Nonwoven Fabric Sheet

[0058] 41. Oiliness Agent Preparation Area (First Oiliness Agent, Blood Lubricating Agent)

[0059] 143 Graphic Layer (Second Oil-Based Agent, Ink) Detailed Implementation

[0060] Specifically, this disclosure relates to the following methods.

[0061] [Method 1]

[0062] A shorts-type absorbent article comprises an absorbent body and an outer body. In its unfolded state, the shorts-type absorbent article has mutually orthogonal length, width, and thickness directions. The absorbent body comprises: an absorbent core; a skin-permeable side sheet disposed on the skin side of the absorbent core; a liquid-impermeable sheet disposed on the non-skin side of the absorbent core; and a first oily agent disposed on the skin-permeable side sheet or the absorbent core. The absorbent body or the outer body comprises a hydrophobic nonwoven fabric sheet disposed on the non-skin side of the liquid-impermeable sheet. The shorts-type absorbent article has a second oily agent, which, when viewed from above in the unfolded state, is at least disposed in a region in the thickness direction that does not overlap with the first oily agent and is located closer to the skin side of the skin-permeable side sheet or closer to the non-skin side of the liquid-impermeable sheet.

[0063] In this shorts-type absorbent article, the second oily agent is disposed at least in a region that does not overlap with the first oily agent in the thickness direction and is closer to the skin side than the skin side sheet or closer to the non-skin side than the liquid-impermeable sheet. That is, the second oily agent (e.g., ink, adhesive) is disposed in a region where it is difficult for the first oily agent (e.g., modifier, skin care agent) to come into contact with the absorbed excrement (e.g., menstrual blood, urine) even if it moves with the excrement. Therefore, it is possible to prevent the first and second oily agents from mixing. Thus, the absorbent article can be endowed with the respective functions of the first and second oily agents, and the function of the second oily agent can be prevented from being degraded by the first oily agent.

[0064] [Method 2]

[0065] In the shorts-type absorbent article described in Method 1, the kinematic viscosity of the first oiling agent is lower than that of the second oiling agent.

[0066] In this shorts-type absorbent article, by relatively reducing the kinematic viscosity of the first oil-based agent, the first oil-based agent can be made more mobile, increasing the ease of contact between the first oil-based agent (modifier, etc.) and excrement, and improving the ease of transfer of the first oil-based agent (skin care agent, etc.) to the skin. Furthermore, by relatively increasing the kinematic viscosity of the second oil-based agent, the second oil-based agent (e.g., ink, adhesive) is made less likely to move from its application site, ensuring its function (in the case of ink, it makes it difficult to dissolve; in the case of adhesive, it makes it difficult to reduce adhesion).

[0067] [Method 3]

[0068] In the shorts-type absorbent article described in method 1 or 2, the liquid-impermeable sheet is moisture-permeable, the liquid-impermeable sheet has a graphic layer disposed on the non-skin side surface, and the second oily agent is ink contained in the graphic layer.

[0069] In this shorts-type absorbent article, the ink, serving as a second oily agent, is disposed on the non-skin-side surface of the liquid-impermeable sheet in a region that does not overlap with the first oily agent in the thickness direction. That is, the ink is disposed in a location where it is difficult for the first oily agent to come into contact with it even if it moves with excrement. Thus, by placing the ink and the first oily agent in a position where they are unlikely to come into contact, even after excrement is absorbed, the first oily agent, passing through the moisture-permeable liquid-impermeable sheet, can prevent the pattern layer from deteriorating due to the first oily agent. Therefore, by making the liquid-impermeable sheet moisture-permeable, stuffiness can be suppressed, and the function of the pattern layer in concealing excrement and making the shorts-type absorbent article resemble underwear can be maintained.

[0070] [Method 4]

[0071] In the shorts-type absorbent article described in Method 3, the graphic layer is also disposed in the region that overlaps with the first oily agent in the thickness direction.

[0072] In this shorts-type absorbent article, the graphic layer is disposed not only in the area overlapping with the first oily agent in the thickness direction, but also in the non-overlapping area. Therefore, by utilizing the areas of the graphic layer that do not overlap with the first oily agent in the thickness direction, a large area of ​​the graphic layer can be disposed. Consequently, even if some parts are affected by the first oily agent, the function of the graphic layer (the function of concealing excrement, the function of making the shorts-type sanitary napkin 1 look like underwear, etc.) can be easily maintained, and the deterioration of the graphic layer's function due to the first oily agent can be more reliably suppressed. Furthermore, by utilizing both the overlapping and non-overlapping areas of the graphic layer in the thickness direction, the area of ​​the graphic layer is expanded, the degree of freedom of the graphic layer is increased, and design flexibility is improved.

[0073] [Method 5]

[0074] In the shorts-type absorbent article described in method 3 or 4, the hydrophobic nonwoven sheet is bonded to the liquid-impermeable sheet using an adhesive in such a way that it covers the non-skin side of the graphic layer.

[0075] In this shorts-type absorbent garment, because the hydrophobic nonwoven fabric sheet is bonded to the liquid-impermeable sheet in a manner that covers the non-skin side of the graphic layer, the risk of the graphic layer rubbing off onto the skin or clothing due to friction is reduced. This allows the function of the graphic layer to be maintained more reliably.

[0076] [Method 6]

[0077] In the shorts-type absorbent article of method 5, the adhesive that bonds the hydrophobic nonwoven sheet and the liquid-impermeable sheet is formed intermittently in the length direction and the width direction.

[0078] In this shorts-type absorbent article, because the adhesive bonding the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is formed intermittently in both the length and width directions, the area of ​​adhesive in contact with the pattern layer can be minimized. This reduces ink mixing with the adhesive and more reliably suppresses deterioration of the pattern layer.

[0079] [Method 7]

[0080] In the shorts-type absorbent article described in method 5 or 6, the kinematic viscosity of the adhesive used to bond the hydrophobic nonwoven sheet and the liquid-impermeable sheet is higher than the kinematic viscosity of the ink.

[0081] In this shorts-type absorbent article, by relatively increasing the kinematic viscosity of the adhesive that bonds the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet, the adhesive becomes less prone to movement, making it difficult for the adhesive and ink to mix. This, in turn, more reliably suppresses functional degradation of the pattern layer.

[0082] [Method 8]

[0083] In any one of the methods 5 to 7, the shorts-type absorbent article comprises: a low-density layer located on the skin side of the surface opposite to the liquid-impermeable sheet; and a high-density layer located on the non-skin side of the low-density layer.

[0084] In this shorts-type absorbent article, the adhesive used to bond the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet easily penetrates into the low-density layer of the hydrophobic nonwoven fabric sheet. Therefore, the adhesive has difficulty migrating to the ink in the pattern layer disposed on the non-skin-permeable surface of the liquid-impermeable sheet, and thus has difficulty contacting the ink. Consequently, ink dissolution and peeling caused by the adhesive can be suppressed. This allows for more reliable maintenance of the pattern layer's function. Furthermore, because a high-density layer exists on the non-skin-permeable side of the hydrophobic nonwoven fabric sheet, even if a first oily agent penetrates through the moisture-permeable liquid-impermeable sheet and reaches the pattern layer, causing ink peeling, ink flow to locations further outward (non-skin-permeable) than the high-density layer can be suppressed.

[0085] [Method 9]

[0086] In the shorts-type absorbent article described in Method 3, the absorbent body has a main body elastic member extending along the length direction, and at the center of the shorts-type absorbent article in the length direction, the first oily agent, the graphic layer, and the main body elastic member overlap in the thickness direction.

[0087] In this shorts-type absorbent garment, the main elastic component contracts relative to body movement, and the absorbent body conforms to the crotch area of ​​the buttocks. This allows the area in the center of the absorbent garment along its length, where the graphic layer is located—the crotch area prone to friction with clothing—to easily separate from the garment. Consequently, functional degradation of the graphic layer can be more reliably suppressed, and the absorbency of the absorbent body can be improved.

[0088] [Method 10]

[0089] In the shorts-type absorbent article described in Method 3, the outer body has a back elastic member disposed in the back region in the length direction and extending along the width direction. In the back region in the length direction of the shorts-type absorbent article, the first oily agent, the graphic layer, and the back elastic member overlap in the thickness direction.

[0090] In this shorts-type absorbent garment, the elastic component on the back contracts in response to body movement, and the absorbent body conforms to the crotch of the buttocks. This allows the area in the center of the absorbent garment along its length, where the graphic layer is located—the crotch area prone to friction with clothing—to easily separate from the garment. This reliably suppresses functional degradation of the graphic layer and improves the absorbency of the absorbent body.

[0091] [Method 11]

[0092] In the shorts-type absorbent article of method 3, the absorbent core has a pair of thin-walled portions extending along the length direction and spaced apart in the width direction, and at the center of the shorts-type absorbent article in the width direction, the first oily agent, the graphic layer, and the pair of thin-walled portions overlap in the thickness direction.

[0093] In this shorts-type absorbent article, a pair of thin-walled portions (e.g., low weight-per-unit-area portion, slit portion, compression portion) cause the central portion of the absorbent body in the width direction to deform upwards in the thickness direction, facilitating the introduction of bodily fluids and allowing this portion to be easily separated from clothing. This more reliably suppresses functional degradation of the pattern layer and improves the absorbency of the absorbent body.

[0094] [Method 12]

[0095] In the shorts-type absorbent article described in method 1 or 2, the second oily agent is an adhesive that bonds the constituent parts of the shorts-type absorbent article together.

[0096] In this shorts-type absorbent article, the adhesive, which serves as the second oily agent, is disposed at least in areas that do not overlap with the first oily agent in the thickness direction. That is, the adhesive is disposed in areas where it is difficult for the first oily agent to come into contact with it even if it moves with the excrement. Thus, by placing the adhesive and the first oily agent in a position where they are unlikely to come into contact, even after the excrement is absorbed, the decrease in the adhesive's bonding strength due to the first oily agent can be suppressed. Therefore, by making the impermeable sheet permeable, stuffiness can be suppressed, and the function of the adhesive can be maintained. Furthermore, even if the bonding strength of other adhesives in areas overlapping with the first oily agent in the thickness direction decreases due to the first oily agent, the bonding can be maintained using the adhesive in areas that do not overlap with the first oily agent in the thickness direction.

[0097] [Method 13]

[0098] In the shorts-type absorbent article of method 12, the liquid-impermeable sheet is moisture-permeable, and the adhesive is an outer body adhesive that bonds the absorbent body and the outer body.

[0099] In this shorts-type absorbent article, the outer body adhesive is disposed at least in areas where it is difficult for the first oily agent to come into contact with it, such as regions that do not overlap with the first oily agent in the thickness direction. Therefore, even if the first oily agent moves through the moisture-permeable but liquid-impermeable sheet after excrement is absorbed, it is difficult for it to come into contact with the outer body adhesive. Thus, the bonding strength of the outer body adhesive is prevented from decreasing due to the first oily agent. Consequently, the function of the outer body adhesive is maintained.

[0100] [Method 14]

[0101] In the shorts-type absorbent article of method 13, the outer body adhesive is formed intermittently in the length direction and the width direction.

[0102] In this shorts-type absorbent article, the outer body adhesive is formed intermittently in both the length and width directions. Therefore, even assuming that the first oily agent reaches the outer body adhesive through the moisture-permeable, liquid-impermeable sheet, causing a decrease in the bonding strength of a portion of the outer body adhesive, a decrease in the bonding strength of other portions of the intermittently formed outer body adhesive can be suppressed. Thus, both moisture permeability and adhesive strength can be maintained.

[0103] [Method 15]

[0104] In the shorts-type absorbent article described in method 13 or 14, the area where the outer body adhesive is formed is larger in the width direction than the area where the first oily agent is formed.

[0105] In this shorts-type absorbent article, the width of the area where the outer body adhesive is formed is wider than the width of the area where the first oily agent is formed. Therefore, even assuming that the first oily agent reaches the outer body adhesive through the moisture-permeable, liquid-impermeable sheet, causing a reduction in the bond strength of a portion of the outer body adhesive, the reduction in bond strength in the wider outer body adhesive area that does not overlap with the first oily agent in the thickness direction can be suppressed. Thus, both moisture permeability and bond strength can be maintained.

[0106] [Method 16]

[0107] In any one of the shorts-type absorbent articles of methods 13 to 15, the outer body adhesive is also disposed in the area overlapping with the first oily agent in the thickness direction.

[0108] In this shorts-type absorbent article, the outer body adhesive has a portion that overlaps with the first oily agent in the thickness direction and a portion that does not overlap. Therefore, in the portion of the outer body adhesive that does not overlap with the first oily agent in the thickness direction, the reduction in bond strength due to the first oily agent can be more reliably suppressed. Furthermore, since the outer body adhesive has both a portion that does not overlap with the first oily agent in the thickness direction and an overlapping portion, the area where the outer body adhesive is disposed becomes wider, thus more reliably preventing the absorbent body from detaching from the outer body due to friction.

[0109] [Method 17]

[0110] In the shorts-type absorbent article of method 13, the outer body includes the hydrophobic nonwoven sheet, the hydrophobic nonwoven sheet comprising: a low-density layer located on the skin side of the surface opposite to the liquid-impermeable sheet; and a high-density layer located on the non-skin side of the outer body compared to the low-density layer.

[0111] In this shorts-type absorbent article, the outer body adhesive easily penetrates into the low-density layer of the hydrophobic nonwoven fabric sheet. Therefore, even if the first oily agent penetrates through the moisture-permeable, liquid-impermeable sheet, the outer body adhesive is difficult to peel off from the hydrophobic nonwoven fabric sheet. Moreover, since a high-density layer exists on the non-skin side of the hydrophobic nonwoven fabric sheet, even if the first oily agent penetrates through the moisture-permeable, liquid-impermeable sheet, causing the outer body adhesive to peel off, the outflow of the outer body adhesive to a position further outward (non-skin side) than the high-density layer can be inhibited.

[0112] [Method 18]

[0113] In the shorts-type absorbent article of method 12, the absorbent body further comprises a pair of side pieces disposed on both sides of the skin side piece in the width direction and extending along the length direction, the adhesive being a side adhesive for joining the pair of side pieces.

[0114] In this shorts-type absorbent article, the side adhesive is disposed at least in areas where it is difficult for the first oily agent to come into contact with it, such as regions that do not overlap with the first oily agent in the thickness direction. Therefore, even if the first oily agent (e.g., a modifier, a skin-care agent) moves and reaches the side adhesive, it is difficult for it to come into contact with the side adhesive. Thus, the reduction in the bonding strength of the side adhesive due to the first oily agent can be suppressed. Therefore, the function of the side adhesive can be maintained. Furthermore, even if the bonding strength of other side adhesives in areas overlapping with the first oily agent in the thickness direction decreases due to the first oily agent, problems are unlikely to occur.

[0115] [Method 19]

[0116] In the shorts-type absorbent article of method 18, the first oily agent is disposed such that it is exposed on the surface of the skin side of the skin side sheet, and the side adhesive is disposed such that it is not exposed on the surface of the skin side of the skin side sheet at a position away from the inner edge of the side sheet in the width direction.

[0117] In this shorts-type absorbent article, by exposing the first oily agent on the skin-side surface of the skin side sheet, the function can be improved. By configuring the side adhesive in a position away from the inner edge of the side sheet in the width direction, such that it is not exposed on the skin-side surface of the skin side sheet, damage to the skin surface can be suppressed and the adhesion can be improved.

[0118] [Method 20]

[0119] In the shorts-type absorbent article described in method 18 or 19, each of the pair of side panels includes a leak-proof wall formed on the inner side in the width direction and extending along the length direction. The leak-proof wall includes a pair of end joints at both ends in the length direction, which are joined to the absorbent body by an end adhesive serving as the side adhesive. The first oily agent is disposed at a position closer to the center side in both the length and width directions than the end adhesive.

[0120] In this shorts-type absorbent article, the first oily agent is positioned closer to the center of the length and width directions than the end adhesives of each pair of leak-proof walls. Therefore, even if the first oily agent diffuses, since the end adhesives are located away from the first oily agent, the decrease in the bonding strength of the end adhesives can be suppressed, the uprightness of the leak-proof walls can be maintained, and thus side leakage can be continuously suppressed.

[0121] [Method 21]

[0122] In the shorts-type absorbent article of method 12, the absorbent body has a pair of leak-proof walls disposed at both ends in the width direction and extending along the length direction, and the adhesive is a leak-proof wall adhesive that bonds the leak-proof wall elastic members to the pair of leak-proof walls respectively.

[0123] In this shorts-type absorbent article, the leak-proof adhesive is positioned on the outer side in the width direction of the first oil-based agent, i.e., in a region where it is difficult for the first oil-based agent to come into contact with it. Therefore, even if the first oil-based agent (e.g., a modifier, a skin-care agent) moves, it is difficult for it to come into contact with the leak-proof adhesive. Thus, the bonding strength of the leak-proof adhesive can be suppressed from decreasing due to the first oil-based agent. As a result, the function of the leak-proof adhesive can be maintained. Furthermore, even if the bonding strength of other outer body adhesives in the area overlapping with the first oil-based agent in the thickness direction decreases due to the first oil-based agent, problems are unlikely to occur.

[0124] In this instruction manual, "pant-type absorbent item" refers to absorbent items in the shape of pants, but it can also be absorbent items in the shape of underwear or a band. Examples of absorbent items include disposable diapers, incontinence pads, sanitary napkins, and panty liners. Here, pant-type (menstrual) sanitary napkins will be used as an example to describe pant-type absorbent items.

[0125] The following details the panty-shaped sanitary napkin disclosed herein.

[0126] [First Implementation Method]

[0127] Figures 1-10 This is a diagram illustrating a panty-shaped sanitary napkin 1 according to one embodiment of this disclosure (hereinafter referred to as "first embodiment"). Specifically, Figure 1 This is a 3D image of a panty-style sanitary napkin (model 1). Figure 2 as well as Figure 3 These are images of the inner and outer surfaces of the shorts-type sanitary napkin 1 in its unfolded state. Figure 4 as well as Figure 5 These are diagrams of the inner and outer surfaces of the absorbent body 3 in its unfolded state. Figure 6 yes Figure 2 The diagram shows the end face of the VI-VI type sanitary napkin 1. It should be noted that... Figure 6 In the middle, the compression part 37 is omitted, and all the joints are not shown. Figure 7 yes Figure 2 A magnified view of the end face of the shorts-type sanitary napkin 1 with the VI-VI end face. Figure 8 yes Figure 2 A magnified view of the end face of the shorts-type sanitary napkin 1 at the VIII-VIII end face. Figure 9This is a diagram of a deformed example of the inner surface of the absorbent body 3 in its unfolded state. Figure 10 This is a diagram of the outer surface of the absorbent body 3, excluding the hydrophobic nonwoven fabric sheet 35, in its unfolded state.

[0128] The panty-type sanitary napkin 1 has a waist opening 101 and a pair of leg openings 103 (one leg opening 103a and the other leg opening 103b), and a pair of locking portions 105 (one locking portion 105a and the other locking portion 105b) extending from the waist opening 101 toward the pair of leg openings 103. The pair of locking portions 105 lock the abdominal region 7 and the dorsal region 9, which will be described later.

[0129] The panty-type sanitary napkin 1 has an absorbent body 3 for absorbing menstrual blood and an outer body 5 with a panty-like shape. The absorbent body 3 has a rectangular shape with a length direction L and a width direction W. The absorbent body 3 and the outer body 5 are fixed to the outer body 5 by a body-to-body joint 131 made of a hot-melt adhesive (outer body adhesive).

[0130] The panty-type sanitary napkin 1, in its unfolded state (where the locking parts 105 (one locking part 105a and the other locking part 105b) are released as needed, allowing the material constituting the panty-type sanitary napkin 1 (e.g., non-woven fabric) to stretch within a range without breaking, thus unfolding the panty-type sanitary napkin 1 on a plane), has a length direction L and a width direction W originating from the absorbent body 3, and a thickness direction T orthogonal to the length direction L and the width direction W. It should be noted that the length direction L and the width direction W refer to the longer and shorter directions of the absorbent body 3, respectively, and not to the longer and shorter directions of the panty-type sanitary napkin 1 in its unfolded state.

[0131] When unfolded, the panty-style sanitary napkin 1 is divided into a ventral region 7 located at a front end 11 of the ventral region 7 and a dorsal region 9 located at a rear end 13 of the ventral region 7, which is positioned along the length direction W from the center of the length direction L of the panty-style sanitary napkin 1. It should be noted that the front end 11 and the rear end 13 refer to the edge of the ventral region 7 and the edge of the dorsal region 9 that divide the waist opening 101, respectively.

[0132] The outer garment 5 includes: a first outer garment piece 111 extending from the ventral region 7 to the back region 9 and disposed on the clothing side; a second ventral outer garment piece 113a extending to the ventral region 7 and disposed on the skin side; and a second back outer garment piece 113b extending to the back region 9 and disposed on the skin side. The first outer garment piece 111, the second ventral outer garment piece 113a, and the second back outer garment piece 113b are each made of a hydrophobic nonwoven fabric sheet.

[0133] The second outer flap 113a is disposed on the skin side of the first outer flap 111 in the thickness direction T, and in the length direction L, it extends from the front end 11 of the waist opening 101 to the front of the length center line LC. Furthermore, the second outer flap 113a is disposed from one locking portion 105a to the other locking portion 105b in the width direction W.

[0134] The second outer cover 113b on the back side is disposed on the skin side of the first outer cover 111 in the thickness direction T, and in the length direction L it extends from the rear end 13 of the waist opening 101 to the front of the center line LC in the length direction. In addition, the second outer cover 113b on the back side is disposed from one locking part 105a to the other locking part 105b in the width direction W.

[0135] The first outer cover 111 folds inward at its front end 11 and rear end 13, respectively covering the ventral second outer cover 113a and the dorsal second outer cover 113b. In its unfolded state, the outer cover 5 is divided into a single-piece region 51 composed of a single piece (i.e., the first outer cover 111) and multiple-piece regions 53 composed of multiple pieces (i.e., the first outer cover 111, and either the ventral second outer cover 113a or the dorsal second outer cover 113b). The single-piece region 51 extends from the ventral region 7 to the dorsal region 9 across the longitudinal centerline LC. The multiple-piece regions 53 are respectively disposed in the ventral region 7 and the dorsal region 9.

[0136] In the unfolded state, in the multiple sheet regions 53 of the ventral region 7, between the first outer sheet 111 and the ventral second outer sheet 113a, a plurality of ventral elastic members 115 are disposed, extending from a locking portion 105a on one side to a locking portion 105b on the other side and disposed separately in the length direction L. When the plurality of ventral elastic members 115 are extended relative to the first outer sheet 111 and the ventral second outer sheet 113a, they are joined to the first outer sheet 111 and the ventral second outer sheet 113a by an inter-sheet adhesive layer (not shown) made of hot melt adhesive.

[0137] In the unfolded state, in the multiple sheet areas 53 of the back side region 9, between the first outer sheet 111 and the second back outer sheet 113b, there are multiple back-side elastic members 117 that extend from one locking portion 105a to the other locking portion 105b or from one leg opening 103a to the other leg opening 103b and are separately arranged in the longitudinal direction L. Additionally, in the unfolded state, in the multiple sheet areas 53 of the back side region 9, between the first outer sheet 111 and the second back outer sheet 113b, there are three rear leg opening elastic members 119. These three rear leg opening elastic members 119 extend from one locking portion 105a through one leg opening 103a and the other leg opening 103b to the other locking portion 105b, and are bent in a manner that overlaps with the absorbent body 3 and protrudes toward the longitudinal centerline LC.

[0138] Multiple back elastic members 117 and three rear leg elastic members 119, in an extended state relative to the first outer piece 111 and the second back outer piece 113b, are joined to the first outer piece 111 and the second ventral outer piece 113a by an inner joint portion 133 of the outer piece made of hot melt adhesive.

[0139] The absorbent body 3 comprises, in the thickness direction T, the following components in sequence: a top sheet 21 having a skin-contact surface 23a and a non-skin-contact surface 23b; a second sheet 25; an absorbent core 27a; a liquid-impermeable sheet 29; a patterned layer 143; an elastic component 31; and a hydrophobic nonwoven fabric sheet 35. The absorbent core 27a, together with the core-cladding layer 27b covering the absorbent core 27a, forms the absorbent body 27. The absorbent core 27a is hourglass-shaped and has a pair of constricted necks 27c in the width direction W.

[0140] It should be noted that the skin-side portions of the top sheet 21, the second sheet 25, and the core cladding 27b are permeable to liquid and are located closer to the skin than the absorbent core 27a; therefore, they can be referred to as skin-side sheets. Additionally, the hydrophobic nonwoven sheet 35 is included in the absorbent body 3, but it may also be included in the outer casing 5. Alternatively, the outer casing 5 may contain a hydrophobic nonwoven sheet different from the hydrophobic nonwoven sheet 35.

[0141] The absorbent body 3 has at least a pair of thin-walled portions that extend along the length direction L and are spaced apart in the width direction W. These thin-walled portions serve as a guide path for excrement (e.g., menstrual blood, urine), and may include compression portions, low-weight-per-unit-area portions, or slit portions. In this embodiment, the absorbent body 3 has a pair of compression portions 37 that compress the top sheet 21, the second sheet 25, and the absorbent body 27 (absorbent core 27a and core cladding 27b). In this embodiment, the compression portions 37 have an overall design that mimics that of a rabbit.

[0142] The core-cladding layer 27b disposed between the absorbent core 27a and the liquid-impermeable sheet 29 is bonded to the absorbent core 27a by the absorbent core 27a and an adhesive layer (not shown) made of hot-melt adhesive. Furthermore, the core-cladding layer 27b disposed between the absorbent core 27a and the liquid-impermeable sheet 29 is bonded to the liquid-impermeable sheet 29 by a core-cladding layer joint 135 made of hot-melt adhesive.

[0143] The absorbent core 27a has a high portion 39 extending along the length direction L at its center in the width direction W. Compared to the portion of the absorbent core 27a other than its high portion 39, the high portion 39 is taller and has a greater weight per unit area. This facilitates contact between the high portion 39 of the absorbent core 27a and the wearer's anal opening, buttocks, etc. The core-covering layer 27b is rolled up and folded into three folds inwards to cover the absorbent core 27a via two fold lines extending parallel to the length direction L. At the center of the absorbent core 27a on the skin side in the width direction W, the core-covering layer 27b has multiple overlapping areas 55, with two overlapping pieces in the thickness direction T and extending along the length direction L.

[0144] The top sheet 21 is configured to cover the second sheet 25 and the absorbent body 27 (absorbent core 27a and core cladding 27b), and is bonded to the liquid-impermeable sheet 29 by a hot-melt adhesive. The liquid-impermeable sheet 29 is made of a moisture-permeable membrane with openings. The liquid-impermeable sheet 29 stands upright together with the leak-proof wall 43 described later, protecting the sides of the liquid-impermeable sheet 29. The hydrophobic nonwoven sheet 35 is made of a hydrophobic nonwoven fabric.

[0145] like Figure 10 As shown, the graphic layer 143 is disposed on the non-skin-facing surface of the liquid-impermeable sheet 29. For example, when viewed from above in the unfolded state, a picture, pattern, text, etc., serving as the graphic layer 143, is disposed in an area overlapping approximately the entire surface of the absorber 27 in the length direction L and width direction W. The graphic layer 143 is, for example, a picture, pattern, text, etc., drawn with ink, formed by conventionally known printing methods such as gravure printing, flexographic printing, offset printing, and inkjet printing. Figure 10 Descriptions of the compression section 37, the elastic component configuration area 33 (described later), and the oily agent configuration area 41 are omitted. The hydrophobic nonwoven sheet 35 is bonded to the liquid-impermeable sheet 29 via a membrane nonwoven interfacing 137 made of a hot melt adhesive, covering the non-skin side of the pattern layer 143.

[0146] A hydrophobic nonwoven fabric sheet 35 is disposed on the non-skin side of the liquid-impermeable sheet 29 and the pattern layer 143. Thus, even if excrement such as menstrual blood or a portion thereof or urine (hereinafter also referred to as "menstrual blood, etc.") permeates through the liquid-impermeable sheet 29, it is possible to prevent menstrual blood, etc., from adhering to other items.

[0147] The elastic member 31 (main elastic member) is composed of five filamentous elastic members, which divide the elastic member arrangement area 33. The five filamentous elastic members are arranged along the length direction L, extending from multiple sheet areas 53 of the ventral region 7 through a single sheet area 51 of the ventral region 7 and a single sheet area 51 of the dorsal region 9 to multiple sheet areas 53 of the dorsal region 9. Furthermore, the five filamentous elastic members constituting the elastic member 31 are separated in the width direction W and arranged at certain intervals. The elastic member 31, with the five filamentous elastic members elongated relative to the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35, is joined to the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35 via the membrane nonwoven fabric insemination portion 137. The elastic member 31 is a component used to facilitate contact between the absorbent body 3, and consequently the absorbent core 27a, and the wearer's excretion opening.

[0148] In this embodiment, when viewed from above in the unfolded state, the elastic member arrangement area 33 is located inside the absorber 27 and has a size of approximately 4 / 5 of its length in the length direction L and approximately 2 / 3 of its length in the width direction W.

[0149] It should be noted that, in Figure 6 The figure shows the elastic member 31 disposed on the side of the liquid-impermeable sheet 29, and the membrane nonwoven fabric inlay portion 137 disposed on the side of the hydrophobic nonwoven fabric sheet 35. However, in reality, the membrane nonwoven fabric inlay portion 137 bonds the elastic member 31 from both the liquid-impermeable sheet 29 side and the hydrophobic nonwoven fabric sheet 35 side. However, it is possible to bond it from either side.

[0150] The absorbent core 27a is divided into a central region 63 in the width direction W, located at the center of the absorbent core 27a, and a pair of side regions 65 in the width direction W, located on both outer sides of the central region 63. Five filamentous elastic members constituting the elastic member 31 are disposed in the central region 63. Additionally, the oily agent placement region 41, described later, is also disposed in the central region 63.

[0151] At both ends of the hydrophobic nonwoven fabric sheet 35 in the width direction W, it is folded inward once and outward once, for a total of two folds extending parallel to the length direction L, forming a leak-proof wall 43. Thus, a pair of leak-proof walls 43 are formed at both ends of the hydrophobic nonwoven fabric sheet 35 in the width direction W. In this case, the sheets forming a pair of leak-proof walls 43 at each end of the hydrophobic nonwoven fabric sheet 35 in the width direction W are arranged on both sides of the top sheet 21 and the second sheet 25 in the width direction W, extending along the length direction L; therefore, they can be considered as a pair of side sheets. Each pair of leak-proof walls 43 has two leak-proof wall elastic members 45 that, in the unfolded state, extend along the length direction L from multiple sheet areas 53 of the ventral region 7 through a single sheet area 51 of the ventral region 7 and multiple sheet areas 53 of the dorsal region 9. The two leak-proof wall elastic members 45 are respectively extended relative to the leak-proof wall 43 (hydrophobic nonwoven fabric sheet 35) and joined to the leak-proof wall 43 (hydrophobic nonwoven fabric sheet 35) by a leak-proof wall joint 141 made of a hot-melt adhesive (leak-proof wall adhesive). It should be noted that in each of the pair of leak-proof walls 43, the area where the two leak-proof wall elastic members 45 are joined to the leak-proof wall 43 (hydrophobic nonwoven fabric sheet 35) and exhibits elasticity is referred to as the elastic area 47. The pair of leak-proof walls 43 are made of hydrophobic nonwoven fabric forming the hydrophobic nonwoven fabric sheet 35, are hydrophobic, and stand upright from the absorbent body 3 when worn to suppress menstrual blood leakage.

[0152] Each pair of leak-proof walls 43 has a pair of end joints 139 made of hot melt adhesive (end adhesive) at both ends in the longitudinal direction L. The pair of leak-proof walls 43 are respectively joined to the top sheet 21 of the absorbent body 3 through the pair of end joints 139. Since the hot melt adhesive used for the leak-proof walls 43 (for example: leak-proof wall adhesive, end adhesive) is the same hot melt adhesive used to form the side sheet of the leak-proof walls 43, it can also be called a side adhesive.

[0153] The absorbent body 3 has an oily agent preparation region 41 disposed on the non-skin-contact surface 23b of the top sheet 21, which contains a first oily agent. Examples of the first oily agent include, for instance, a modifier such as the blood-lubricating agent described in Patent Document 1, and skin-care agents conventionally used in absorbent articles. It should be noted that the first oily agent does not include hydrophilic agents that impart hydrophilicity to the synthetic fibers used in liquid-permeable sheets such as the top sheet 21 and the second sheet 25.

[0154] In this embodiment, the first oiling agent is the blood lubricating agent described in Patent Document 1. When viewed from above in the unfolded state, the oiling agent placement area 41 is located approximately at the center of both the length direction L and the width direction W, in a region closer to the inner side of the elastic member placement area 33. Figure 5Specifically, when viewed from above in the unfolded state, the oily agent preparation area 41 is located inside the elastic component preparation area 33, and its size is, for example, approximately 4 / 5 of its length in the length direction L and approximately 1 / 2 of its length in the width direction W. However, the oily agent preparation area 41 is not limited to this example; for example, it may be wider in the width direction W than the elastic component preparation area 33 of the absorber 27. Figure 9 (Example) and / or configured wide (not shown) along the length direction L.

[0155] The panty-type sanitary napkin 1 has a second oily agent, which, when viewed from above in its unfolded state, is at least disposed in a region in the thickness direction T that does not overlap with the oily agent placement region 41 (the first oily agent) and is located closer to the skin than the top sheet 21 or closer to the non-skin than the liquid-impermeable sheet 29. Examples of the second oily agent include ink for the graphic layer 143 and a hot-melt adhesive for bonding the components of the panty-type sanitary napkin 1 together. It should be noted that the second oily agent may also be disposed not only in the region that does not overlap with the oily agent placement region 41 in the thickness direction T, but also in the overlapping region.

[0156] In this embodiment, the second oiling agent is at least one of the following: ink disposed on the graphic layer 143 near the non-skin side of the impermeable sheet 29; hot melt adhesive (outer body adhesive) of the body insemination portion 131; hot melt adhesive of the inner insemination portion 133 of the outer sheet; hot melt adhesive of the membrane nonwoven fabric insemination portion 137; hot melt adhesive (end adhesive) of a pair of end joints 139 disposed near the skin side of the top sheet 21; and hot melt adhesive (leak-proof wall adhesive) of the leak-proof wall joint 141.

[0157] However, the oil-based agent preparation area 41 can also be prepared on other skin-side sheets (second sheet 25, skin-side core-coating 27b) or absorbent core 27a. In this case, the second oil-based agent is prepared in a region that is closer to the skin side than the other skin-side sheet or absorbent core 27a having the oil-based agent preparation area 41, or closer to the non-skin side than the impermeable sheet 29.

[0158] Thus, in the panty-type sanitary napkin 1, the second oily agent (e.g., ink, adhesive) is positioned at least in a location where it does not overlap with the first oily agent (e.g., modifier, skin-care agent) in the thickness direction and is closer to the skin side than the skin-side sheet like the top sheet 21 or closer to the non-skin side than the liquid-impermeable sheet 29. That is, the second oily agent is positioned in a location where it is difficult for the first oily agent to come into contact with the first oily agent even if it diffuses and moves along with absorbed excrement (e.g., menstrual blood, urine) towards the non-skin side, in the length direction L, or in the width direction W. Therefore, it is possible to prevent the first and second oily agents from mixing. Consequently, the panty-type sanitary napkin 1 can be endowed with the functions of both the first and second oily agents, and the deterioration of the function of the second oily agent due to dissolution into or flow out with the first oily agent can be prevented.

[0159] The second oily agent can be, for example, the ink of the graphic layer 143. In this case, when viewed from above in its unfolded state, the ink is arranged in the form of a picture, pattern, or text on the non-skin side surface of the impermeable sheet 29, outside the oily agent placement area 41, which is the first oily agent. The ink, as the second oily agent, is placed on the non-skin side surface of the impermeable sheet 29 and does not overlap with the first oily agent in the thickness direction T of the oily agent placement area 41. That is, the ink is placed in a position where it is difficult for the first oily agent to come into contact with the first oily agent even if it moves with excrement such as menstrual blood. In this way, by placing the ink and the first oily agent in a position where they are difficult to contact each other, even after the excrement is absorbed, the first oily agent can pass through the moisture-permeable impermeable sheet, and the deterioration of the graphic layer 143 due to the first oily agent can be suppressed. Thus, by making the impermeable sheet 29 permeable to moisture, it is possible to suppress stuffiness, and to maintain the function of the graphic layer 143 in concealing excrement and making the panty-style sanitary napkin 1 look like underwear.

[0160] It should be noted that the ink in the graphic layer 143 can also be disposed in a region that overlaps with the oily agent placement region 41, which is the first oily agent, in the thickness direction T. In this case, the graphic layer 143 can be disposed over a large area by using the region where it does not overlap with the first oily agent in the thickness direction T. Thus, even if there are some parts affected by the first oily agent, it is easy to maintain the function of the graphic layer 143 (the function of concealing excrement, the function of making the panty-type sanitary napkin 1 look like underwear, etc.), and the function of the graphic layer 143 can be more reliably suppressed from deterioration due to the first oily agent. Furthermore, by using both the region where the graphic layer 143 overlaps with the first oily agent and the region where it does not overlap in the thickness direction T, the area of ​​the graphic layer 143 is expanded, the degree of freedom of the graphic layer 143 is increased, and the design flexibility can be improved.

[0161] The hydrophobic nonwoven sheet 35 can also be bonded to the liquid-impermeable sheet 29 using a hot-melt adhesive at the interfacing portion 137 of the membrane nonwoven fabric, covering the non-skin side of the patterned layer 143. In this case, the risk of the patterned layer 143 rubbing against the skin or clothing and falling off can be reduced. As a result, the function of the patterned layer 143 can be maintained more reliably.

[0162] In this embodiment, such as Figure 7 as well as Figure 8 As shown, the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35 are joined together by a membrane nonwoven fabric interlocking portion 137. The membrane nonwoven fabric interlocking portion 137 is composed of a plurality of hot-melt adhesives 137a, which are arranged in a spiral shape along the length direction L and spaced apart in the width direction W, at least within the oil-based agent placement area 41 in the unfolded top view. In this embodiment, the membrane nonwoven fabric interlocking portion 137 is composed of a plurality of hot-melt adhesives 137a arranged in a spiral shape along the length direction L and spaced apart in the width direction W on the entire surface of the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35. Therefore, when the membrane nonwoven fabric interlocking portion 137 is cut along any straight line parallel to the length direction L, the hot-melt adhesives 137a are intermittently arranged along the length direction L. Furthermore, when the nonwoven membrane interlocking portion 137 is cut along any straight line parallel to the width direction W, the hot melt adhesive 137a is intermittently disposed along the width direction W.

[0163] In this way, the shorts-type sanitary napkin 1 can also intermittently form a hot-melt adhesive 137a that bonds the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35 in both the length direction L and the width direction W. In this case, the area of ​​the hot-melt adhesive 137a in contact with the pattern layer 143 can be minimized. As a result, the ink in the pattern layer 143 mixed with the hot-melt adhesive 137a can be reduced, and the deterioration of the pattern layer 143 can be more reliably suppressed.

[0164] In addition, such as Figure 7 as well as Figure 8 As shown, in the unbonded portion between the liquid-impermeable sheet 29 and the hydrophobic nonwoven fabric sheet 35, gaps 151 easily form between them. As a result, menstrual blood and other substances 155 that have passed through the fine openings 153 of the liquid-impermeable sheet 29 are less likely to reach the hydrophobic nonwoven fabric sheet 35, and are less likely to reach positions further outward than the hydrophobic nonwoven fabric sheet 35, thereby inhibiting the adhesion of menstrual blood and other substances to other items.

[0165] like Figure 7 or Figure 8As shown, the hydrophobic nonwoven sheet 35 can also be made of hydrophobic SMS nonwoven fabric. In this case, the hydrophobic nonwoven sheet 35 sequentially comprises a first low-density layer 161, a high-density layer 163, and a second low-density layer 165 from the side of the liquid-impermeable sheet 29. The high-density layer 163 has a relatively higher density than the first low-density layer 161 and the second low-density layer 165. Therefore, the hot-melt adhesive 137a of the inter-layer nonwoven fabric bonding portion 137, which bonds the hydrophobic nonwoven sheet 35 and the liquid-impermeable sheet 29, easily penetrates into the first low-density layer 161 of the hydrophobic nonwoven sheet 35. Therefore, the hot-melt adhesive 137a is difficult to move to the ink of the pattern layer 143 disposed on the non-skin side of the liquid-impermeable sheet 29, and is difficult to contact with the ink. Therefore, the dissolution and peeling of ink caused by the hot-melt adhesive 137a can be suppressed. As a result, the function of the pattern layer 143 can be maintained more reliably. Furthermore, since a high-density layer 163 exists on the non-skin side of the hydrophobic nonwoven fabric sheet 35, even if the first oily agent penetrates through the moisture-permeable but liquid-impermeable sheet 29 and reaches the pattern layer 143, causing ink peeling, ink leakage to a position further outward (non-skin side) than the high-density layer 163 can be suppressed. Moreover, by having a second low-density layer 165, even if the peeled ink reaches the high-density layer 163, due to the density gradient, it can be suppressed from reaching the outer side of the second low-density layer 165.

[0166] The panty-type sanitary napkin 1 may also have an additional hydrophobic nonwoven fabric sheet, such as a second outer sheet 113a on the ventral side, a first outer sheet 111, or a second outer sheet 113b on the back side, which are located in the oily agent preparation area 41 when unfolded and are adjacent to the non-skin side of the hydrophobic nonwoven fabric sheet 35. Figure 6 Specifically, in the multiple sheet regions 53 of the ventral region 7, the ventral second outer sheet 113a corresponds to an additional hydrophobic nonwoven sheet. In the single sheet region 51 of the ventral region 7 and the dorsal region 9, the first outer sheet 111 corresponds to an additional hydrophobic nonwoven sheet. In the multiple sheet regions 53 of the dorsal region 9, the dorsal second outer sheet 113b corresponds to an additional hydrophobic nonwoven sheet. Thus, even if the first oily agent and excrement permeate through the liquid-impermeable sheet 29, they are unlikely to reach positions further outward than the hydrophobic nonwoven sheet 35 and the ventral second outer sheet 113a, the first outer sheet 111, and the dorsal second outer sheet 113b, which correspond to the additional hydrophobic nonwoven sheet.

[0167] The elastic member 31 (main elastic member), extending along the length direction L, i.e., the elastic member configuration area 33, can also overlap with the oily agent configuration area 41 (which serves as the first oily agent) and the pattern layer 143 in the thickness direction T at the central part of the length direction L of the shorts-type sanitary napkin 1. In this case, in the shorts-type sanitary napkin 1, the elastic member 31 contracts relative to the movement of the body, and the absorbent body 3 conforms to the groove of the buttocks. As a result, the area in the central part of the length direction L of the shorts-type sanitary napkin 1 where the pattern layer 143 is configured, i.e., the crotch area that is prone to friction with clothing, can be easily separated from the clothing. As a result, the functional degradation of the pattern layer 143 can be more reliably suppressed, and the absorbency of the absorbent body can be improved. The crotch area in the length direction L of the shorts-type sanitary napkin 1 is the central area when the length direction L of the shorts-type sanitary napkin 1 is approximately divided into three equal parts.

[0168] Multiple back-side elastic members 117, disposed in the region on the back side in the length direction L and extending along the width direction W, can also overlap with the oily agent placement region 41 and the pattern layer 143, which serves as the first oily agent, in the thickness direction T of the back-side region 9 in the length direction L of the shorts-type sanitary napkin 1. In this case, in the shorts-type sanitary napkin 1, the multiple back-side elastic members 117 contract relative to the movement of the body, and the absorbent body 3 conforms to the groove of the buttocks. As a result, the region in the central part of the shorts-type sanitary napkin 1 in the length direction L where the pattern layer 143 is disposed, i.e., the crotch area that is prone to friction with clothing, can be easily separated from the clothing. As a result, the functional degradation of the pattern layer 143 can be more reliably suppressed, and the absorbency of the absorbent body can be improved. The crotch area in the length direction L of the shorts-type sanitary napkin 1 is as described above.

[0169] exist Figure 9 In the modified example shown, a pair of compression portions 37 extending along the length direction L and spaced apart in the width direction W can overlap with the oil-based agent preparation area 41 and the pattern layer 143, which serves as the first oil-based agent, in the thickness direction T at the center of the width direction W of the panty-type sanitary napkin 1. In this case, in the panty-type sanitary napkin 1, the pair of compression portions 37 (which may also be low-weight portions or slit portions) deform the center of the absorbent body 3 in the width direction W upwards in the thickness direction T, making it easy to introduce bodily fluids and easy to separate this portion from clothing. As a result, functional degradation of the pattern layer 143 can be more reliably suppressed, and the absorbency of the absorbent body 3 can be improved.

[0170] The second oily agent can be, for example, a hot-melt adhesive that bonds the components of the panty-type sanitary napkin 1 together. In this case, the hot-melt adhesive, as the second oily agent, is disposed in a region in the thickness direction T that does not overlap with the first oily agent in the oily agent placement area 41. That is, the hot-melt adhesive is disposed in a region where the first oily agent is unlikely to come into contact with the excrement, even if it moves with the excrement such as menstrual blood. In this way, by placing the hot-melt adhesive and the first oily agent in a position where they are unlikely to come into contact with each other, the bonding strength of the hot-melt adhesive can be suppressed from decreasing due to the first oily agent, even after the excrement is absorbed. As a result, stuffiness can be suppressed by making the impermeable sheet 29 permeable, and the function of the hot-melt adhesive can be maintained. In addition, even if the bonding strength of other hot-melt adhesives in the region overlapping with the first oily agent in the thickness direction T decreases due to the first oily agent, the bonding can be maintained by using the hot-melt adhesive in the region that does not overlap with the first oily agent in the thickness direction T.

[0171] The second oily agent can be, for example, the hot-melt adhesive (outer body adhesive) 131a in the hot-melt adhesive that bonds the components of the panty-type sanitary napkin 1 together, specifically the hot-melt adhesive at the interbody bonding portion 131 that bonds the absorbent body 3 and the outer body 5. In this case, the hot-melt adhesive (outer body adhesive) 131a is positioned in a region that does not overlap with the first oily agent in the thickness direction T, making it difficult for it to come into contact with the first oily agent. Therefore, even if the first oily agent moves through the moisture-permeable, liquid-impermeable sheet along with excrement such as menstrual blood, it is difficult for it to come into contact with the outer body adhesive. Thus, the bonding strength of the hot-melt adhesive (outer body adhesive) 131a can be suppressed from decreasing due to the first oily agent. As a result, the function of the hot-melt adhesive (outer body adhesive) 131a can be maintained. Furthermore, even if it is assumed that the bonding strength of other hot melt adhesives (outer body adhesives) 131a in the region overlapping with the first oily agent in the thickness direction T is reduced due to the first oily agent, the bonding can be maintained by using hot melt adhesives (outer body adhesives) 131a in the region that do not overlap with the first oily agent in the thickness direction T.

[0172] like Figure 7 as well as Figure 8As shown, the hydrophobic nonwoven fabric sheet 35 and the first outer cover sheet 111 / back side second outer cover sheet 113b are joined together by a main body indirect bonding portion 131. The main body indirect bonding portion 131 is composed of a plurality of hot melt adhesives (outer cover adhesives) 131a that extend spirally in the length direction L and are spaced apart in the width direction W, at least in the top view when viewed from above in the unfolded state. In this embodiment, the main body indirect bonding portion 131 is composed of a plurality of hot melt adhesives 131a that extend spirally in the length direction L and are spaced apart in the width direction W on the entire surface of the hydrophobic nonwoven fabric sheet 35 and the first outer cover sheet 111 / back side second outer cover sheet 113b. Therefore, when the main body indirect bonding portion 131 is cut in any straight line parallel to the length direction L, the hot melt adhesives (outer cover adhesives) 131a are intermittently arranged in the length direction L. Furthermore, when the interlocking portion 131 of the main body is cut along any straight line parallel to the width direction W, the hot melt adhesive (outer body adhesive) 131a is intermittently disposed in the width direction W. Also, the interlocking portion 137 of the membrane nonwoven fabric and the interlocking portion 131 of the main body have non-overlapping joint portions (not shown) that do not overlap in the thickness direction T.

[0173] Thus, in the shorts-type sanitary napkin 1, the hot-melt adhesive 131a of the main body indirect bonding portion 131, which joins the hydrophobic nonwoven fabric sheet 35 and the first outer sheet 111 / back-side second outer sheet 113b, can be formed intermittently in both the length direction L and the width direction W. In this case, even if it is assumed that the first oily agent reaches the hot-melt adhesive 131a through the moisture-permeable, liquid-impermeable sheet 29, causing a decrease in the bonding strength of a portion of the hot-melt adhesive 131a, the decrease in the bonding strength of other portions of the intermittently formed hot-melt adhesive 131a can be suppressed. Therefore, both moisture permeability and adhesive strength can be maintained.

[0174] In addition, such as Figure 7 as well as Figure 8 As shown, in the unbonded portion between the hydrophobic nonwoven fabric sheet 35 and the first outer cover sheet 111 / back side second outer cover sheet 113b, gaps 151 easily form between the hydrophobic nonwoven fabric sheet 35 and the first outer cover sheet 111 / back side second outer cover sheet 113b. As a result, menstrual blood and other substances 155 that have passed through the micro-openings 153 of the liquid-impermeable sheet 29 are unlikely to reach the first outer cover sheet 111 / back side second outer cover sheet 113b, and are unlikely to reach a position further outward than the first outer cover sheet 111 / back side second outer cover sheet 113b, thereby inhibiting the adhesion of menstrual blood and other substances to other items.

[0175] The dimension in the width direction W of the area of ​​the interbody bonding portion 131 formed by the hot melt adhesive (outer body adhesive) 131a can be larger than the dimension in the width direction W of the oily agent placement area 41 where the first oily agent is disposed. That is, the width of the area of ​​the interbody bonding portion 131 can be wider than the width of the oily agent placement area 41. In this case, even if it is assumed that the first oily agent reaches the hot melt adhesive 131a through the moisture-permeable impermeable sheet 29, causing a reduction in the bonding strength of a portion of the hot melt adhesive 131a, it is possible to suppress the reduction in the bonding strength of the hot melt adhesive 131a in the area of ​​the broad outer body adhesive that does not overlap with the first oily agent in the thickness direction with the oily agent placement area 41. Thus, it is possible to maintain both the moisture permeability of the impermeable sheet 29 and the bonding strength of the hot melt adhesive (outer body adhesive) 131a.

[0176] In this embodiment, when viewed from above in the unfolded state, the main body indirect joining portion 131 is disposed between the hydrophobic nonwoven fabric sheet 35 and the first outer mounting sheet 111. Figure 7 (situation) / backside second outer casing 113b ( Figure 8 The entire surface of the area overlapping in the thickness direction T. Therefore, the width of the interlocking portion 131 of the main body is approximately the same as the width of the absorbent main body 3. On the other hand, when viewed from above in the unfolded state, the oily agent placement area 41 is positioned inside the absorbent body 27 in both the width direction W and the length direction L. Therefore, the width of the oily agent placement area 41 is smaller than the width of the absorbent main body 3. Figure 5 or Figure 9 (In the case of...). Therefore, compared with the oily agent preparation area 41, the main body indirect bonding portion 131 has a larger dimension in the width direction W and a larger dimension in the length direction L, and thus has a portion formed in a manner that surrounds the oily agent preparation area 41. As a result, it is possible to more reliably maintain both the moisture permeability of the impermeable sheet 29 and the adhesive strength of the hot melt adhesive (outer body adhesive) 131a.

[0177] The hot melt adhesive (outer body adhesive) 131a of the main body indirect bonding portion 131 may also be disposed in the area that overlaps with the first oily agent in the thickness direction T when viewed from above in the unfolded state. In this case, the hot melt adhesive (outer body adhesive) 131a has a portion that overlaps with the first oily agent in the thickness direction T and a portion that does not overlap. Thus, in the portion of the hot melt adhesive (outer body adhesive) 131a that does not overlap with the first oily agent in the thickness direction T, the reduction in bonding strength due to the first oily agent can be more reliably suppressed. Moreover, the hot melt adhesive (outer body adhesive) 131a not only has a portion that does not overlap with the first oily agent in the thickness direction T but also has an overlapping portion, thus the area where the hot melt adhesive (outer body adhesive) 131a is disposed becomes wider, and therefore, it is possible to more reliably prevent the absorbent main body 3 from detaching from the outer body 5 due to friction.

[0178] Furthermore, as described above, the hydrophobic nonwoven fabric sheet 35 may also sequentially comprise a first low-density layer 161, a high-density layer 163, and a second low-density layer 165 from the side of the liquid-impermeable sheet 29. In this case, the hot-melt adhesive 131a (outer body adhesive) of the inter-body bonding portion 131, which bonds the absorbent body 3 and the outer body 5, easily penetrates into the first low-density layer 161 of the hydrophobic nonwoven fabric sheet 35. Therefore, even if the first oily agent penetrates through the moisture-permeable liquid-impermeable sheet 29, the hot-melt adhesive 131a (outer body adhesive) is difficult to peel off from the hydrophobic nonwoven fabric sheet 35. Furthermore, since a high-density layer 163 exists on the non-skin side of the hydrophobic nonwoven fabric sheet 35, even if the first oily agent permeates through the moisture-permeable but liquid-impermeable sheet 29, causing the hot melt adhesive 131a (outer body adhesive) to peel off, it is possible to prevent the hot melt adhesive 131a (outer body adhesive) from flowing out to a position further outward (non-skin side) than the high-density layer 163. Moreover, by having a second low-density layer 165, even if the peeled hot melt adhesive reaches the high-density layer 163, due to the density gradient, it is possible to prevent it from reaching the outer side of the second low-density layer 165.

[0179] The second oiling agent can be, for example, a hot melt adhesive (side adhesive) used to bond the hydrophobic nonwoven fabric sheets 35 (side sheets) forming a pair of leak-proof walls 43. Examples of hot melt adhesives for bonding the hydrophobic nonwoven fabric sheets 35 include leak-proof wall adhesives for leak-proof wall joints 141 and end adhesives for end joints 139. Such hot melt adhesives are disposed at least in areas where they are difficult to contact with the first oiling agent, such as regions that do not overlap with the first oiling agent in the thickness direction T. Therefore, even if the first oiling agent (e.g., a modifier, a skin-care agent) moves to the hot melt adhesive (side adhesive), it is difficult for it to contact the hot melt adhesive (side adhesive). Therefore, the reduction in the bonding strength of the hot melt adhesive (side adhesive) due to the first oiling agent can be suppressed. Thus, the function of the hot melt adhesive (side adhesive) can be maintained. Furthermore, even if other hot melt adhesives (side adhesives) in the area overlapping with the first oiling agent in the thickness direction T have reduced bonding strength due to the first oiling agent, it is difficult for problems to occur.

[0180] The first oily agent can also be configured such that it is exposed on the skin-side surface of the top sheet 21 (skin-side sheet). In this case, the end adhesive (side adhesive) of the end joint 139, which is the second oily agent, is configured such that it is not exposed on the skin-side surface of the top sheet 21 (skin-side sheet) but is located away from the inner edge of the hydrophobic nonwoven fabric sheet 35 (side sheet) in the width direction W. In this way, by exposing the first oily agent on the skin-side surface of the top sheet 21, the function can be improved. By configuring the end adhesive of the end joint 139 such that it is not exposed on the skin-side surface of the top sheet 21 but is located away from the inner edge of the hydrophobic nonwoven fabric sheet 35 in the width direction W (the same position as the inner edge of the leak-proof wall 43 in the width direction W, i.e., the inner edge of the end joint 139), damage to the skin surface can be suppressed and the adhesion can be improved.

[0181] The first oily agent can also be positioned at a central position in both the length direction L and the width direction W, relative to the end adhesive (side adhesive) of the end joint 139, which is the second oily agent. In this case, even if the first oily agent diffuses, since the end adhesive of the end joint 139 is located away from the first oily agent, the decrease in the bonding strength of the end adhesive can be suppressed, the uprightness of the leak-proof wall 43 can be maintained, and thus side leakage can be continuously suppressed.

[0182] In the panty-type sanitary napkin 1, the leak-proof adhesive of the leak-proof joint 141 can also be disposed on the outer side in the width direction W, which is less likely to come into contact with the first oily agent. In this case, even if the first oily agent moves, it is difficult for it to come into contact with the leak-proof adhesive. Therefore, it is possible to suppress the reduction of the bonding strength of the leak-proof adhesive due to the first oily agent. As a result, the function of the leak-proof adhesive can be maintained. In addition, even if the bonding strength of other outer body adhesives in the area overlapping with the first oily agent in the thickness direction T is reduced due to the first oily agent, it is difficult for problems to occur.

[0183] The components constituting the absorbent body 3, such as the top sheet 21, the second sheet 25, the absorbent core 27a, the core sheath 27b, the liquid-impermeable sheet 29, the elastic component 31, the hydrophobic nonwoven sheet 35, the leak-proof wall elastic component 45, the ventral elastic component 115, the back elastic component 117, and the rear leg circumference elastic component 119, and the components constituting the outer body 5, such as the first outer sheet 111, the ventral second outer sheet 113a, and the back second outer sheet 113b, can be made of conventionally known materials. However, depending on the different components, materials that meet the requirements described below are used.

[0184] In the aforementioned oiliness agent formulation area, from the viewpoint of its function, the first oiliness agent is preferably at 0.01 g / m³. 2 More preferably, 0.1 g / m 2 The above is further optimized with 0.5g / m 2 The above describes the weight distribution per unit area. Furthermore, in the aforementioned oiling agent formulation area, from the viewpoint of its function, the first oiling agent is preferably at 20 g / m². 2 Below, 10g / m is preferred. 2 The following is a further preferred option with 5g / m 2 The following is the weight configuration per unit area.

[0185] The aforementioned liquid-impermeable sheet is composed of a moisture-permeable membrane. Preferably, the liquid-impermeable sheet has a density of 1500 g / m³. 2 • A permeability of 24 hours or more, preferably 3000 g / m² 2 • Moisture permeability for more than 24 hours. Additionally, the aforementioned liquid-impermeable sheet preferably has a density of 7200 g / m³. 2 • A permeability of less than 24 hours, preferably 6500 g / m³ 2 • Moisture permeability for less than 24 hours. This is from the perspective of suppressing stuffiness. In this disclosure, the above-mentioned moisture permeability can be determined according to JIS Z0208-1976 "Test Method for Moisture Permeability of Moisture-proof Packaging Materials (Cup Method)". It should be noted that the temperature and humidity conditions for the test are set as follows: temperature: 40±0.5℃, relative humidity: 60±2%.

[0186] From the viewpoint of being impermeable to liquid, the above-mentioned moisture-permeable membrane preferably satisfies the following requirements.

[0187] (1) In a constant temperature room at 25℃±5℃, the membrane sample was left to stand for 24 hours.

[0188] (2) On one side of the sample, use a dropper to drop 1 mL of physiological saline from a height of 3 cm to form a water droplet on the membrane.

[0189] (3) After the saline solution is dripped, check within 5 minutes whether the water droplet has passed from one side to the other side.

[0190] (4) Change position and repeat steps (1) to (3) a total of 3 times.

[0191] (5) If physiological saline does not pass through the membrane in all three tests, the membrane is judged to be impermeable.

[0192] The aforementioned moisture-permeable membrane may have openings that can be visually confirmed (e.g., pores larger than 20 μm), or it may have micro-openings that are difficult to visually confirm (e.g., pores smaller than 20 μm).

[0193] In this specification, the hydrophobic nonwoven fabric sheet and any additional hydrophobic nonwoven fabric sheets added as needed are hydrophobic, for example, composed of hydrophobic fibers. Examples of such hydrophobic fibers include synthetic fibers. Examples of such synthetic fibers include fibers containing a single component, such as monofilament fibers, or fibers containing multiple components, such as composite fibers. Furthermore, the synthetic fibers can be bioplastics, recycled materials, etc.

[0194] Examples of the aforementioned components include, for example, polyolefin polymers, such as polyethylene and polypropylene; polyester polymers, such as terephthalate polymers, such as polyethylene terephthalate (PET), polybutylene terephthalate, and polypentyl terephthalate; polyamide polymers, such as nylon 6 and nylon 6,6; acrylic polymers; polyacrylonitrile polymers; and modified forms thereof.

[0195] The aforementioned hydrophobic fibers may include waterproof cellulose fibers that have been treated with a waterproofing agent to impart water resistance. Examples of such cellulose fibers include natural cellulose fibers, regenerated cellulose fibers, refined cellulose fibers, and semi-synthetic cellulose fibers. Examples of such natural cellulose fibers include plant fibers, such as pulp fibers, seed hair fibers (e.g., cotton fibers), bast fibers (e.g., hemp), leaf vein fibers (e.g., Manila hemp), and fruit fibers (e.g., coconut).

[0196] The pulp fibers mentioned above include pulp fibers known in this art, such as wood pulp fibers and non-wood pulp fibers. Examples of wood pulp fibers include coniferous pulp fibers and broadleaf pulp fibers. Examples of non-wood pulp fibers include straw pulp fibers, bagasse pulp fibers, reed pulp fibers, kenaf pulp fibers, mulberry pulp fibers, bamboo pulp fibers, hemp pulp fibers, and cotton pulp fibers (e.g., cotton lint fibers). The pulp fibers may also be waste paper, recycled pulp fibers, etc.

[0197] Examples of cotton fibers mentioned above include upland cotton (e.g., upland cotton), Barbadense cotton, Arboreum cotton, and Herbaceum cotton. Additionally, these cotton fibers can be organic cotton or pre-organic cotton (trademarked). Organic cotton refers to cotton certified by GOTS (Global Organic Textile Standard).

[0198] Examples of the aforementioned regenerated cellulose fibers include rayon, such as viscose rayon obtained from viscose, polynosic fiber, modal fiber, and cuprammonium rayon (also known as "cuprammonium fiber") obtained from a cuprammonium salt solution of cellulose.

[0199] Examples of refined cellulose fibers include Lyocell fiber, which is produced by dissolving pulp in an aqueous solution of N-methylmorpholine N-oxide to form a spinning dope, which is then extruded into a dilute solution of N-methylmorpholine N-oxide to produce fibers. This refined cellulose fiber is commercially available, for example, as Tencel (trademark). Examples of semi-synthetic fibers include semi-synthetic cellulose, such as acetate fiber, triacetate fiber, and diacetate fiber.

[0200] As an ink for the graphic layer (an example of a second oil-based agent), conventionally known inks can be used, such as oil-based inks. Oil-based inks, for example, contain organic solvents, pigments, thermoplastic resins, and additives (conductive agents, plasticizers, antioxidants, UV absorbers, etc.).

[0201] The oil-based ink preferably has a higher kinematic viscosity than the first oiling agent (e.g., a blood lubricating agent). The kinematic viscosity of the oil-based ink is higher than that of the first oiling agent at 40°C, and is preferably 20–500 mm⁻¹. 2 / s, more preferably 30-400mm 2 / s, further preferably 40–300 mm 2 / s, more preferably 50-200mm 2 / s.

[0202] The hot melt adhesives used for the main body indirect bonding portion 131, the outer sheet inner bonding portion 133, the core cladding bonding portion 135, the membrane nonwoven fabric indirect bonding portion 137, the end bonding portion 139, and the leak-proof wall bonding portion 141 can be conventionally known hot melt adhesives, such as hot melt adhesives formed from thermoplastic synthetic resins. Examples of hot melt adhesives include ethylene vinyl acetate-based hot melt adhesives, polyolefin-based hot melt adhesives, rubber-based hot melt adhesives, polyamide-based hot melt adhesives, polyurethane-based hot melt adhesives, and acrylic-based hot melt adhesives. However, the aforementioned bonding portions can also utilize conventionally known bonding methods based on other types of adhesives or hot melt bonding methods.

[0203] Furthermore, in order to arrange the aforementioned joints intermittently in the length and / or width directions, examples include extending the joints, for example, along a predetermined direction (e.g., the length direction or the width direction), and spaced apart in a direction orthogonal to the predetermined direction to form a line or dot shape. Examples of such linear joints include spiral, striped, Ω-shaped, etc.

[0204] The hot melt adhesive (an example of a second oiling agent) preferably has a higher kinematic viscosity than the first oiling agent (e.g., a blood lubricating agent). The kinematic viscosity of the hot melt adhesive is higher than that of the first oiling agent at 40°C, and preferably 1000 mm. 2 / s, more preferably 5000mm 2 / s, further preferably 10000mm 2 / s. It can also be in a roughly solid state at 40℃.

[0205] Furthermore, it is preferable that the hot melt adhesive at least at the joint between the nonwoven fabric and the film has a higher kinematic viscosity than that of the oil-based ink. Even in this case, the kinematic viscosity of the hot melt adhesive is as described above.

[0206] The kinematic viscosity of the first oil-based agent (e.g., a modifier, a skin-care agent) is preferably lower than that of the second oil-based agent (e.g., an ink, an adhesive). By relatively reducing the kinematic viscosity of the first oil-based agent, it becomes easier for the first oil-based agent to move, increasing the ease of contact between the first oil-based agent (modifier, etc.) and the excrement, and improving the ease of transfer of the first oil-based agent (skin-care agent, etc.) to the skin. Furthermore, by relatively increasing the kinematic viscosity of the second oil-based agent, it becomes more difficult for the second oil-based agent (e.g., an ink, an adhesive) to move from its application site, ensuring its functionality (making it difficult for the ink to dissolve and for the adhesiveness of the adhesive to decrease). To further enhance the above effects, it is preferable that the first oil-based agent is a liquid at 35°C and the second oil-based agent is a solid at 35°C.

[0207] The kinematic viscosity of the hot-melt adhesive in the bonding section 137 of the nonwoven membrane where the hydrophobic nonwoven sheet 35 and the liquid-impermeable sheet 29 are bonded is preferably higher than the kinematic viscosity of the ink in the pattern layer 143. By relatively increasing the kinematic viscosity of the hot-melt adhesive in the bonding section 137, the hot-melt adhesive becomes less mobile, making it difficult for the hot-melt adhesive and ink to mix. As a result, functional degradation of the pattern layer 143 can be more reliably suppressed.

[0208] The aforementioned panty-style sanitary napkins may not contain volatile cooling agents or fragrances. Therefore, they are less likely to prevent the first oiling agent from allowing menstrual blood to slide onto the absorbent core, resulting in excellent absorbency. Furthermore, they can inhibit the irritation of the physiologically sensitive area around the clitoris by volatile cooling agents and fragrances.

[0209] In this disclosure, the first oiling agent has the same function as the blood lubricant described in Patent Document 1, allowing menstrual blood to slide from the skin side sheet, preferably from the top sheet, onto the absorbent core. The first oiling agent has a preferred thickness of 0.01 to 80 mm at 40°C. 2 / s, more preferably 1 to 70 mm 2 / s, further preferably 3-60mm 2 / s, more preferably 5-50mm 2 The kinematic viscosity is preferably 7–45 mm / s. 2 kinematic viscosity / s.

[0210] In addition, the first oiling agent is designed to achieve a thickness of 0.01–80 mm at 40°C. 2 The kinematic viscosity is approximately 80 mg / s, and the melting point of the first oiling agent is preferably below 45°C. This is because if the first oiling agent contains crystals at 40°C, its kinematic viscosity tends to increase. It should be noted that in this specification, the kinematic viscosity at 40°C is sometimes simply referred to as "kinematic viscosity." If the above kinematic viscosity exceeds 80 mg / s... 2 / s, then the viscosity of the first oily agent is high, and it tends to be difficult to slide down from the skin side sheet along with menstrual blood, preferably from the top sheet to the absorption core.

[0211] The kinematic viscosity described above can be measured using a Cannon-Fenske countercurrent viscometer at a test temperature of 40°C, according to "5. Test method for kinematic viscosity" in JIS K 2283:2000.

[0212] The first oily agent preferably has a water retention rate of 0.01 to 4.0% by mass, more preferably 0.02 to 3.5% by mass, even more preferably 0.03 to 3.0% by mass, even more preferably 0.04 to 2.5% by mass, and even more preferably 0.05 to 2.0% by mass.

[0213] In this specification, "water retention rate" refers to the percentage of water that a substance can retain, which can be determined as follows.

[0214] (1) In a constant temperature room at 40℃, the test tube, rubber stopper, substance to be tested and deionized water were left to stand for 24 hours.

[0215] (2) In the above constant temperature room, add 5.0g of the substance to be tested and 5.0g of deionized water to a 20mL test tube.

[0216] (3) In the above constant temperature room, plug the mouth of the test tube with a rubber stopper, rotate it once, and let it stand for 5 minutes.

[0217] (4) In the above constant temperature room, 3.0g of the layer (usually the upper layer) of the substance to be tested is collected into a glass petri dish (mass: W0) with a diameter of 90mm.

[0218] (5) Heat the above petri dishes in an oven at 105°C for 3 hours to evaporate the moisture, and measure the mass (mass: W1) together with the petri dishes.

[0219] (6) Calculate the water retention rate according to the following formula.

[0220] Water retention rate (mass%) = 100 × (W0 - W1) / 3.0

[0221] The measurement was performed three times, and the average value was used.

[0222] The first oiling agent preferably has a weight-average molecular weight of less than 1000, and more preferably less than 900. This is because if the weight-average molecular weight is 1000 or more, the first oiling agent itself will become sticky, which may cause discomfort to the wearer. The first oiling agent preferably has a weight-average molecular weight of 100 or more, and more preferably 200 or more. This is because if the weight-average molecular weight is smaller, the vapor pressure of the first oiling agent will be higher, and it may sometimes vaporize during storage, resulting in problems such as reduced quantity and odor when worn.

[0223] It should be noted that, in this specification, "weight-average molecular weight" is a concept encompassing both polydisperse compounds (e.g., compounds manufactured by stepwise polymerization, esters formed from multiple fatty acids and multiple aliphatic monohydric alcohols) and single compounds (e.g., esters formed from one fatty acid and one aliphatic monohydric alcohol), in the context of N... i Molecular weight M i In a system composed of molecules (i = 1, or i = 1, 2...), it refers to the system defined by the following formula:

[0224] M w =ΣN i M i 2 / ΣN i M i

[0225] The calculated M w .

[0226] In this specification, weight-average molecular weight refers to the value of polystyrene obtained by gel permeation chromatography (GPC).

[0227] Examples of conditions for GPC determination include the following.

[0228] Model: (Hitachi High Technology Co., Ltd.) High Performance Liquid Chromatograph Lachrom Elite

[0229] Chromatographic columns: SHODEX KF-801, KF-803, and KF-804 manufactured by Showa Denko Co., Ltd.

[0230] Elution buffer: THF

[0231] Flow rate: 1.0 mL / min

[0232] Injection volume: 100μL

[0233] Testing: RI (Differential Refractometer)

[0234] Examples of components of the aforementioned first oily agent include (a1) an ester of a chain tetraol and at least one fatty acid, (a2) an ester of a chain triol and at least one fatty acid, (a3) ​​an ester of a chain diol and at least one fatty acid, (b1) an ether of a chain tetraol and at least one aliphatic monohydric alcohol, (b2) an ether of a chain triol and at least one aliphatic monohydric alcohol, (b3) an ether of a chain diol and at least one aliphatic monohydric alcohol, (c1) an ester of a chain tetracarboxylic acid, hydroxy acid, alkoxy acid, or oxyacid having four carboxyl groups and at least one aliphatic monohydric alcohol, and (c2) an ester of a chain tricarboxylic acid, hydroxy acid, alkoxy acid, or oxyacid having three carboxyl groups. Esters of amino acids, alkoxy acids or oxyacids with at least one aliphatic monohydric alcohol, (c3) esters of dicarboxylic acids, hydroxy acids, alkoxy acids or oxyacids with at least one aliphatic monohydric alcohol, (d1) ethers of aliphatic monohydric alcohols and aliphatic monohydric alcohols, (d2) dialkyl ketones, (d3) esters of fatty acids and aliphatic monohydric alcohols, (d4) dialkyl carbonate esters, (e1) polyoxy C3-C6 alkylene glycols, (e2) esters of polyoxy C3-C6 alkylene glycols with at least one fatty acid, (e3) ethers of polyoxy C3-C6 alkylene glycols with at least one aliphatic monohydric alcohol, and (f1) chain alkanes.

[0235] [(a1) Ester of a chain-like hydrocarbon tetraol with at least one fatty acid]

[0236] Examples of (a1) chain esters of alkyl esters and at least one fatty acid include tetraesters of pentaerythritol and fatty acid, triesters of pentaerythritol and fatty acid, diesters of pentaerythritol and fatty acid, and monoesters of pentaerythritol and fatty acid.

[0237] Examples of the aforementioned fatty acids include saturated fatty acids, such as C2-C4 fatty acids. 30 Saturated fatty acids, such as acetic acid (C2) (C2 represents the number of carbon atoms, the same below), propionic acid (C3), butyric acid (C4) and their isomers, such as 2-methylpropionic acid (C4), valeric acid (C5) and its isomers, such as 2-methylbutyric acid (C5), 2,2-dimethylpropionic acid (C5), hexanoic acid (C6), heptanoic acid (C7), octanoic acid (C8) and its isomers, such as 2-ethylhexanoic acid (C8), nonanoic acid (C9), decanoic acid (C9), etc. 10 ), dodecanoic acid (C 12 ), tetradecanoic acid (C 14 ), hexadecanoic acid (C 16 ), heptadecanoic acid (C 17 ), octadecanoic acid (C 18 ), eicosanoic acid (C 20 ), cocoacid (C 22 ), coesanoic acid (C 24 ), hexacosanoic acid (C 26 ), octacosanoic acid (C28 ), triacono-2-carboxylic acid (C 30 (etc.) and their isomers not listed.

[0238] The aforementioned fatty acids can also be unsaturated fatty acids. Examples of such unsaturated fatty acids include C3-C6 fatty acids. 20 Unsaturated fatty acids, such as monounsaturated fatty acids, such as crotonic acid (C4) and myristone acid (C4). 14 ), palmitoleic acid (C 16 ), oleic acid (C 18 ), oleic acid (C 18 ), isoleic acid (C 18 ), codoleic acid (C 20 ), eicosenoic acid (C 20 Diunsaturated fatty acids, such as linoleic acid (C60-32-34 ...5-34-34-35-34-35-34-35-34-35-34 18 ), eicosadienoic acid (C 20 ) and other triunsaturated fatty acids, such as linolenic acid, such as alpha-linolenic acid (C 18 ) and γ-linolenic acid (C 18 ), pine oil (C 18 ), tung oil acid, for example α-tung oil acid (C 18 ) and β-tung oil (C 18 ), Meadic acid (C 20 ), dihypo-γ-linolenic acid (C 20 ), eicosatrienoic acid (C 20 Tetraunsaturated fatty acids, such as octadecanoic acid (C40-24-3 ...5-34-34-35-34-34-35-34-35-34-35-34-35-34-35-34-35-34-35-34-35-35-34-35-35-34-35-35-35-34-35-35-35-35-35-35-35-3 20 ), Arachidonic acid (C 20 ), eicosatraenoic acid (C 20 ) and other pentaunsaturated fatty acids, such as octadecanoic acid (C60-21-32 ... 18 ), eicosapentaenoic acid (C 20 ) and some of their hydrogenated derivatives.

[0239] As for the above-mentioned pentaerythritol and fatty acid esters, considering the possibility of modification due to oxidation, etc., pentaerythritol and fatty acid esters derived from saturated fatty acids are preferred, that is, pentaerythritol and saturated fatty acid esters.

[0240] Furthermore, from the viewpoint of reducing the water retention rate, diester, triester, or tetraester is preferred as the ester of the aforementioned pentaerythritol and fatty acid, more preferably triester or tetraester, and even more preferably tetraester.

[0241] Commercially available products that are esters of the aforementioned pentaerythritol and fatty acids include UNISTAR H-408BRS and H-2408BRS-22 (mixed products) (all manufactured by Nippon Oil Co., Ltd.).

[0242] [(a2) Ester of a chain triol with at least one fatty acid]

[0243] Examples of (a2) chain triols and at least one fatty acid esters include triesters of glycerol and fatty acid, diesters of glycerol and fatty acid, and monoesters of glycerol and fatty acid.

[0244] The fatty acids mentioned above are as described above.

[0245] From the viewpoint of reducing the water retention rate, diesters or triesters are preferred as esters of the aforementioned glycerol and fatty acids, and triesters are more preferred.

[0246] Examples of triesters of glycerol with two or more fatty acids include glycerol with caprylic acid (C8) and capric acid (C8). 10 Triglycerides, glycerols, caprylic acid (C8), and decanoic acid (C8) 10 ) and dodecanoic acid (C 12 Triglycerides, glycerols, caprylic acid (C8), and decanoic acid (C8) 10 ), dodecanoic acid (C 12 ), tetradecanoic acid (C 14 ), hexadecanoic acid (C 16 ) and octadecanoic acid (C 18 Triesters, etc.

[0247] From the viewpoint of having a melting point of 45°C or below, the triester of glycerol and fatty acids preferably has a total number of carbon atoms of the fatty acids constituting the triester of glycerol and fatty acids of about 40 or less.

[0248] Commercially available products that are triglycerides of the aforementioned glycerol and fatty acids include triglycerides of coconut oil, NA36, PANACET800, PANACET800B and PANACET810S, triglycerides of C2L oil and triglycerides of CL oil (all manufactured by Nippon Oil Co., Ltd.).

[0249] [(a3) Ester of a chain-like hydrocarbon diol with at least one fatty acid]

[0250] As an ester of (a3) ​​a chain diol with at least one fatty acid, examples include C2-C6 chain diols, such as C2-C6 diols, such as ethylene glycol, propylene glycol, butanediol, pentanediol or hexanediol with fatty acid monoesters or diesters.

[0251] Examples of the aforementioned fatty acids include those listed in "(a1) esters of chain alkyl tetraols and at least one fatty acid".

[0252] As for the esters of C2-C6 diols and fatty acids mentioned above, considering the possibility of modification due to oxidation, etc., esters of C2-C6 diols and fatty acids derived from saturated fatty acids are preferred, that is, esters of C2-C6 diols and saturated fatty acids.

[0253] Furthermore, from the viewpoint of reducing the water retention rate, esters of diols and fatty acids derived from diols with a large number of carbon atoms are preferred as C2-C6 diols and fatty acids, such as esters of diols and fatty acids derived from butanediol, pentanediol, or hexanediol.

[0254] Furthermore, from the viewpoint of reducing the water retention rate, diesters are preferred as esters of the aforementioned C2-C6 diols and fatty acids.

[0255] Commercially available products that are esters of the aforementioned C2-C6 diols and fatty acids include, for example, COMPOL BL and COMPOLBS (both manufactured by Nippon Oil Co., Ltd.).

[0256] [(b1) Ethers of chain-like hydrocarbon tetraols and at least one aliphatic monohydric alcohol]

[0257] Examples of (b1) ethers of a chain-like hydrocarbon tetraol and at least one aliphatic monohydric alcohol include tetraethers, triethers, diethers, and monoethers of pentaerythritol and aliphatic monohydric alcohol.

[0258] Examples of aliphatic monohydric alcohols include saturated aliphatic monohydric alcohols and unsaturated aliphatic monohydric alcohols.

[0259] Examples of saturated aliphatic monohydric alcohols mentioned above include C1 to C2. 20 Saturated aliphatic monohydric alcohols, such as methanol (C1) (C1 represents the number of carbon atoms, the same below), ethanol (C2), propanol (C3) and its isomers, such as isopropanol (C3), butanol (C4) and its isomers, such as sec-butanol (C4) and tert-butanol (C4), pentanol (C5), hexanol (C6), heptanol (C7), octanol (C8) and its isomers, such as 2-ethylhexanol (C8), nonanol (C9), decanol (C1), and so on. 10 ), dodecyl alcohol (C 12 ), tetradecyl alcohol (C 14 ), hexadecyl alcohol (C 16 ), heptadecanol (C 17 ), octadecyl alcohol (C 18 ) and eicosanol (C 20 ), and their unlisted isomers.

[0260] As an example of the aforementioned unsaturated aliphatic monohydric alcohols, alcohols obtained by replacing one of the C=C single bonds in the aforementioned saturated aliphatic monohydric alcohols with a C=C double bond, such as oleyl alcohols, are marketed by Shin Nippon Rika Co., Ltd. under the names RIKACOL series and UNJECOL series.

[0261] [(b2) Ethers of chain triols and at least one aliphatic monohydric alcohol]

[0262] (b2) Ethers of chain trihydric alcohols and at least one aliphatic monohydric alcohol, for example, triethers, diethers and monoethers of glycerol and aliphatic monohydric alcohols.

[0263] The aforementioned aliphatic monohydric alcohols are as described above.

[0264] [(b3) Ethers of chain-like hydrocarbon diols and at least one aliphatic monohydric alcohol]

[0265] Examples of (b3) ethers of chain diols and at least one aliphatic monohydric alcohol include diethers of C2-C6 diols and aliphatic monohydric alcohols, and monoethers of C2-C6 diols and aliphatic monohydric alcohols.

[0266] The aforementioned aliphatic monohydric alcohols are as described above.

[0267] [(c1) An ester of a chain hydrocarbon having four carboxyl groups, a tetracarboxylic acid, a hydroxy acid, an alkoxy acid, or an oxyacid with at least one aliphatic monohydric alcohol]

[0268] As (c1) an ester of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid or oxyacid having four carboxyl groups and at least one aliphatic monohydric alcohol, examples include monoesters, diesters, trimers and tetraesters of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid or oxyacid having four carboxyl groups and at least one aliphatic monohydric alcohol, preferably diesters, trimers and tetraesters, more preferably trimers and tetraesters, and even more preferably tetraesters.

[0269] Examples of the aforementioned chain-like tetracarboxylic acids include alkane tetracarboxylic acids, such as butane tetracarboxylic acid, pentane tetracarboxylic acid, hexane tetracarboxylic acid, heptane tetracarboxylic acid, octane tetracarboxylic acid, nonane tetracarboxylic acid, and decane tetracarboxylic acid.

[0270] The aforementioned aliphatic monohydric alcohols are as described above.

[0271] [(c2) An ester of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid, or oxyacid with at least one aliphatic monohydric alcohol]

[0272] As (c2), an ester of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid or oxyacid having three carboxyl groups and at least one aliphatic monohydric alcohol, examples include monoesters, diesters and tripesters of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid or oxyacid having three carboxyl groups and at least one aliphatic monohydric alcohol, preferably diesters and tripesters, more preferably tripesters.

[0273] Examples of the aforementioned chain-like hydrocarbon tricarboxylic acids include alkane tricarboxylic acids, such as propane tricarboxylic acid, butane tricarboxylic acid, pentane tricarboxylic acid, hexane tricarboxylic acid, heptane tricarboxylic acid, octane tricarboxylic acid, nonane tricarboxylic acid, and decane tricarboxylic acid.

[0274] The aforementioned aliphatic monohydric alcohols are as described above.

[0275] As an example, O-acetylthiocitrate tributyl ester can be cited, and it is available on the market.

[0276] [(c3) An ester of a chain hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid, or oxyacid with two carboxyl groups and at least one aliphatic monohydric alcohol]

[0277] As (c3) an ester of a chain-like hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid or oxyacid having two carboxyl groups and at least one aliphatic monohydric alcohol, examples include monoesters and diesters of a chain-like hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid or oxyacid having two carboxyl groups and at least one aliphatic monohydric alcohol, preferably diesters.

[0278] Examples of the aforementioned chain-like hydrocarbon dicarboxylic acids include alkane dicarboxylic acids such as ethanedioic acid, propanedioic acid, butanedioic acid, pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, nonanedioic acid, and decanedioic acid.

[0279] Regarding the aforementioned aliphatic monohydric alcohols, as described above.

[0280] As an example, dioctyl adipate, which is available on the market, can be cited.

[0281] [(d1) Aliphatic monohydric alcohols and their ethers]

[0282] Examples of aliphatic monohydric alcohols and their ethers include those having the following formula (1):

[0283] R 1 OR 2 (1)

[0284] (where R is in the formula) 1 and R 2 (These are chain hydrocarbons)

[0285] Compounds.

[0286] The aliphatic monohydric alcohol constituting the above ether (in formula (1), equivalent to R)1 OH and R 2 OH), as described above.

[0287] [(d2)dialkyl ketone]

[0288] As the aforementioned dialkyl ketone, examples can be given of those having the following formula (2):

[0289] R 3 COR 4 (2)

[0290] (where R is in the formula) 3 and R 4 (Alkyl groups respectively)

[0291] Compounds.

[0292] In addition to being sold on the market, the aforementioned dialkyl ketones can also be obtained by known methods, such as oxidizing secondary alcohols with chromic acid.

[0293] [(d3) esters of fatty acids and aliphatic monohydric alcohols]

[0294] Examples of esters of the aforementioned fatty acids and aliphatic monohydric alcohols include those having the following formula (3):

[0295] R 5 COOR 6 (3)

[0296] (where R is in the formula) 5 and R 6 (These are chain hydrocarbons)

[0297] Compounds.

[0298] The fatty acids that constitute the above esters (in formula (3), are equivalent to R) 5 Examples of fatty acids include COOH, and saturated fatty acids are preferred considering the possibility of modification due to oxidation, etc. The aliphatic monohydric alcohol constituting the above ester (in formula (3), R) is equivalent to... 6 OH), for example, the aforementioned aliphatic monohydric alcohols.

[0299] Examples of esters of the aforementioned fatty acids and aliphatic monohydric alcohols include, for instance, dodecanoic acid (C... 12 ) and dodecyl alcohol (C 12 ) esters, tetradecanoic acid (C 14 ) and dodecyl alcohol (C 12 Esters of fatty acids and aliphatic monohydric alcohols, such as ELECTOL WE20 and ELECTOL WE40 (both manufactured by Nippon Oil Co., Ltd.), are commercially available products.

[0300] [(d4)dialkyl carbonate]

[0301] As the aforementioned dialkyl carbonate, examples with the following formula (4) can be cited:

[0302] R 7 OC(=O)OR 8 (4)

[0303] (where R is in the formula) 7 and R 8 (Alkyl groups respectively)

[0304] Compounds.

[0305] In addition to being commercially available, the aforementioned dialkyl carbonates can also be synthesized through the reaction of carbonyl chloride with alcohols, the reaction of chloroformates with alcohols or alcohol derivatives, and the reaction of silver carbonate with alkyl iodides.

[0306] [(e1) Polyoxy C3-C6 alkylene glycols]

[0307] The aforementioned polyoxy C3-C6 alkylene glycols refer to: i) homopolymers having any one of the following skeletons selected from the group consisting of oxy-C3-C6 alkylene skeletons, namely oxy-propylene skeletons, oxy-butylene skeletons, oxy-pentylene skeletons, and oxy-hexylene skeletons, and having hydroxyl groups at both ends; ii) block copolymers having two or more skeletons selected from the above group and having hydroxyl groups at both ends; or iii) random copolymers having two or more skeletons selected from the above group and having hydroxyl groups at both ends.

[0308] Commercially available products of the aforementioned poly(C3-C6) alkylene glycols include, for example, UNIOL (trademark) PB-500 and PB-700 (both manufactured by Nippon Oil Co., Ltd.).

[0309] [(e2) Ester of polyoxy C3-C6 alkylene glycols with at least one fatty acid]

[0310] Examples of esters of the aforementioned polyoxy C3-C6 alkylene glycols and at least one fatty acid include esters, monoesters, and diesters of polyoxy C3-C6 alkylene glycols whose OH ends are esterified with fatty acids, as described in the section “(e1) polyoxy C3-C6 alkylene glycols”.

[0311] Regarding the fatty acids mentioned above, as stated above.

[0312] [(e3) Ethers of polyoxy C3-C6 alkylene glycols and at least one aliphatic monohydric alcohol]

[0313] Examples of ethers of the aforementioned polyoxy C3-C6 alkylene glycols and at least one aliphatic monohydric alcohol include ethers, i.e., monoethers and diethers, in which one or both of the OH ends of the polyoxy C3-C6 alkylene glycols described in the section “(e1) polyoxy C3-C6 alkylene glycols” are etherified with an aliphatic monohydric alcohol.

[0314] Regarding the aforementioned aliphatic monohydric alcohols, as described above.

[0315] [(f1) chain alkanes]

[0316] Examples of (f1) chain alkanes include straight-chain alkanes and branched-chain alkanes.

[0317] For example, PARLEAM6 (Nippon Yusen Co., Ltd.) is a commercially available product of the aforementioned hydrocarbons.

[0318] The absorbent shorts-type articles of this utility model are not limited to the above-described embodiments, and can be appropriately combined and modified within the scope of the purpose and spirit of this utility model.

Claims

1. A shorts-type absorbent article, comprising an absorbent body and an outer body, characterized in that, The shorts-type absorbent item, when unfolded, has mutually orthogonal length, width, and thickness directions. The absorbent body possesses: Absorption core; A skin-side sheet, which is disposed on the skin side of the absorbent core and is liquid-permeable; An impermeable sheet, wherein the impermeable sheet is disposed on the non-skin side of the absorbent core; and A first oil-based agent is disposed on the skin side panel or the absorption core. The absorbent body or the outer casing includes a hydrophobic nonwoven fabric sheet disposed on the non-skin side of the liquid-impermeable sheet. The shorts-type absorbent article has a second oiling agent, which, when viewed from above in the unfolded state, is disposed at least in a region that does not overlap with the first oiling agent in the thickness direction and is located closer to the skin side than the skin side sheet or closer to the non-skin side than the liquid-impermeable sheet.

2. The shorts-type absorbent article as described in claim 1, characterized in that, The kinematic viscosity of the first oily agent is lower than that of the second oily agent.

3. The shorts-type absorbent article as described in claim 1 or 2, characterized in that, The liquid-impermeable sheet is moisture-permeable. The liquid-impermeable sheet has a patterned layer disposed on the surface of the non-skin side. The second oily agent is ink contained in the graphic layer.

4. The shorts-type absorbent article as described in claim 3, characterized in that, The graphic layer is also disposed in the region that overlaps with the first oily agent in the thickness direction.

5. The shorts-type absorbent article as described in claim 3, characterized in that, The hydrophobic nonwoven sheet is bonded to the liquid-impermeable sheet using an adhesive in a manner that covers the non-skin side of the graphic layer.

6. The shorts-type absorbent article as described in claim 5, characterized in that, The adhesive used to bond the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is formed intermittently in the length direction and the width direction.

7. The shorts-type absorbent article as described in claim 5, characterized in that, The kinematic viscosity of the adhesive used to bond the hydrophobic nonwoven fabric sheet and the liquid-impermeable sheet is higher than that of the ink.

8. The shorts-type absorbent article as described in claim 5, characterized in that, The hydrophobic nonwoven fabric sheet includes: A low-density layer, the low-density layer being located on the skin-side surface opposite to the liquid-impermeable sheet; and A high-density layer, wherein the high-density layer is located on the non-skin side compared to the low-density layer.

9. The shorts-type absorbent article as described in claim 3, characterized in that, The absorbent body includes a main elastic member extending along the length direction. At the center of the shorts-type absorbent article along its length, the first oily agent, the graphic layer, and the main elastic component overlap in the thickness direction.

10. The shorts-type absorbent article as described in claim 3, characterized in that, The outer casing includes a back-side elastic member disposed in the region on the back side in the length direction and extending along the width direction. In the region on the back side of the shorts-type absorbent article along its length, the first oily agent, the graphic layer, and the back elastic member overlap in the thickness direction.

11. The shorts-type absorbent article as described in claim 3, characterized in that, The absorbent core has a pair of thin-walled portions that extend along the length direction and are spaced apart in the width direction. At the center of the shorts-type absorbent article in the width direction, the first oily agent, the graphic layer, and the pair of thin-walled portions overlap in the thickness direction.

12. The shorts-type absorbent article as described in claim 1 or 2, characterized in that, The second oily agent is an adhesive that bonds the components of the shorts-type absorbent article together.

13. The shorts-type absorbent article as claimed in claim 12, characterized in that, The liquid-impermeable sheet is moisture-permeable. The adhesive is an outer casing adhesive that bonds the absorbent body and the outer casing together.

14. The shorts-type absorbent article as claimed in claim 13, characterized in that, The outer body adhesive is formed intermittently in the length direction and the width direction.

15. The shorts-type absorbent article as claimed in claim 13, characterized in that, The dimension of the region where the outer body adhesive is formed in the width direction is larger than the dimension of the region where the first oily agent is formed in the width direction.

16. The shorts-type absorbent article as claimed in claim 13, characterized in that, The outer body adhesive is also disposed in the region that overlaps with the first oily agent in the thickness direction.

17. The shorts-type absorbent article as claimed in claim 13, characterized in that, The outer casing includes the hydrophobic nonwoven fabric sheet. The hydrophobic nonwoven fabric sheet includes: A low-density layer, the low-density layer being located on the skin side of the surface opposite to the liquid-impermeable sheet; and A high-density layer, which is located on the non-skin side compared to the low-density layer.

18. The shorts-type absorbent article as claimed in claim 12, characterized in that, The absorbent body also includes a pair of side plates disposed on both sides of the skin side plate in the width direction and extending along the length direction. The adhesive is a side adhesive used to join the pair of side pieces.

19. The shorts-type absorbent article as claimed in claim 18, characterized in that, The first oily agent is configured such that it is exposed on the skin-side surface of the skin-side sheet. The side adhesive is positioned away from the inner edge of the side piece in the width direction, in a manner that does not expose the skin side surface of the skin side piece.

20. The shorts-type absorbent article as claimed in claim 18, characterized in that, The pair of side panels each include a leak-proof wall formed on the inner side in the width direction and extending along the length direction. The leak-proof wall includes a pair of end joints at both ends along its length, which are joined to the absorbent body using end adhesives that serve as the side adhesives. The first oily agent is positioned at a location closer to the center of the length and width directions than the end adhesive.

21. The shorts-type absorbent article as claimed in claim 12, characterized in that, The absorbent body has a pair of leak-proof walls disposed at both ends in the width direction and extending along the length direction. The adhesive is a leak-proof wall adhesive used to bond the elastic components of the leak-proof walls to the pair of leak-proof walls respectively.

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