JP2012016456A - Wearing article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wearing article capable of preventing not only an oppression to the periphery of the abdomen caused by a change or the like in a posture while being worn but also an excessive pulling of the wearing article at the time of wearing by applying a proper extensibility to a projecting part.SOLUTION: In the wearing article having an article body having a longitudinal direction reaching a back side part from an abdominal part through a crotch part and the width direction crossing the same at a right angle and the projecting parts arranged at both side edges in the width direction of at least one of the abdominal part and the back side part, each of the projection parts has a sheet member, a plurality of elastic members and a plurality of yarn-like members, and a plurality of the elastic members and a plurality of the yarn-like members together extend outwardly in the width direction to be arranged to the sheet member while the elastic members are arranged in an extended state and made shrinkable when the extended state is released.

Description

  The present invention relates to a wearing article such as a disposable diaper.

  When wearing wearing articles such as unfoldable disposable diapers and diaper covers, the overhanging part in the width direction of the back side that is usually placed on the back side of the wearer is kept on the abdomen side, and the diaper abdomen side part is fixed by a fixing member. Stick to the outer surface. Thus, the diaper can be worn while being properly tightened around the waist so as not to slip off. However, depending on the movement of the wearer's body after wearing, the diaper may press the abdomen. For example, in the case of a care recipient, when the diaper is worn, turning around in the bed or raising the upper body for a meal causes the stomach to swell and be compressed. In order to solve this problem, there have been various devices designed to give the overhanging portion elasticity. For example, a side panel in which a sheet material formed by laminating a stretchable nonwoven fabric on a stretchable film is applied to a side flap of a diaper (see Patent Document 1), or a laminated structure sheet in which an elastic member such as rubber is arranged. (See Patent Document 2).

JP-A-10-713 JP 2000-503610 A

  By the way, in a wearing article such as a deployable disposable diaper using the above-described stretchable overhanging portion, the overhanging portion may be strongly pulled to the maximum extension length in an attempt to firmly fix the diaper. In this case, the abdomen is pressed by overtightening. Further, this excessive pulling may cause damage to the overhanging portion.

  Therefore, the present invention can prevent pressure around the stomach due to a change in posture during wearing by giving appropriate elasticity to the overhanging portion, and also prevents excessive tension when wearing. An object is to provide a wearable article.

  The present invention has a longitudinal direction extending from the abdominal side part to the back side part across the crotch part and a width direction perpendicular thereto, and the article main body and at least one width direction both side edges of the abdominal side part and the back side part An overhanging portion disposed on the sheet, wherein the overhanging portion includes a sheet member, a plurality of elastic members, and a plurality of thread-like members, and the plurality of elastic members and the thread-like members are both articles. The present invention provides a worn article that extends outward in the width direction of the main body and is disposed on the sheet member, and that the elastic member is disposed in an extended state and can be contracted when the extended state is released.

  The wearing article of the present invention can prevent pressure around the abdomen due to a change in posture during wearing by imparting appropriate stretchability to the overhanging portion, and also prevents excessive tension when worn. There is an excellent effect of being able to.

It is a partial notch expansion | deployment top view which shows typically the state which expand | deployed the expandable disposable diaper as one Embodiment in the absorbent article of this invention. It is the disassembled perspective view which showed typically the sheet | seat member, elastic member, and thread-like member which comprise the panel member used as the overhang | projection part (side flap) which concerns on embodiment of this invention. It is the model top view and side view which show a mode that the panel member shown in FIG. 2 expand | extends, (a) shows the expansion | extension state, (b) shows the natural state.

FIG. 1 is a partially cutaway developed plan view schematically showing a developed state of a developed disposable diaper 10 as an embodiment of the absorbent article of the present invention.
The unfoldable disposable diaper 10 of this embodiment is a diaper for adults. As shown in FIG. 1, in a plan view of the unfolded state, an abdominal side F disposed on the abdomen side of the wearer when worn, An article main body 10a composed of a crotch part C disposed on the crotch part of the wearer and a back side part R disposed on the back side of the wearer. A pair of overhang portions (side flaps) 5 and 5 are disposed on the left and right side edges in the width direction of the back side portion R of the article main body 10a, and further, the fastening is performed on the outer side of the side edge 5b in the width direction of each side flap 5. A tape 6 is disposed. The article main body 10a in the present embodiment includes a liquid-permeable top sheet 1 disposed on the skin contact surface side, a waterproof back sheet 2 disposed on the non-skin contact surface side, and the two sheets. An intervening absorber 3 is provided. Further, a pair of side sheets 4 and 4 are laminated on the skin surface side of the top sheet 1. The side sheet 4, the top sheet 1, and the back sheet 2 are joined outside the side edge of the absorber 3 to form a vertically long outer shape of the article body 10a. At the end in the width direction of the back side portion R of the main body 10a, the joint side end 5a of the side flap 5 is interposed between the top sheet 1 and the back sheet 2. The edge in the width direction at the joint portion is referred to as a longitudinal base line t extending in the longitudinal direction or extending from the dorsal side R to the ventral side F. In other words, the vertical direction base line t coincides with the height direction of the wearer in the wearing state.

  In the present invention, unless otherwise specified, the surface in contact with the human body is referred to as the skin side surface or skin contact surface or surface, and the opposite surface is referred to as the non-skin surface or non-skin contact surface or back surface. Of these two surfaces, the side close to the skin side or the extending direction is called the skin side, the skin contact surface side or the surface side, and the side close to the non-skin surface or the extending direction is the non-skin side, non-skin It is called the contact side or the back side. The direction positioned on the front side of the human body when worn is referred to as the front, and its end is referred to as the front end, and the direction positioned on the rear is referred to as the rear, and the end is referred to as the rear end. The normal direction of the front or back surface of the absorbent article is called the thickness direction, and the amount is called thickness. Furthermore, in the plan view of the absorbent article, a direction from the abdominal side to the back side through the crotch is referred to as a vertical direction, and a direction orthogonal to the vertical direction is referred to as a width direction. The vertical direction typically coincides with the front-rear direction of the human body when worn.

  In the present embodiment, when wearing the disposable diaper 10 having such a configuration, the body is turned sideways from a state in which a wearer such as a care recipient is laid on his / her back, and the back side portion R of the diaper is worn by the wearer. Arrange it so that it is on the back side of the back and turn the wearer back. Further, I and the stomach side F of the diaper are attached to the lower abdomen of the wearer so that the crotch part C of the diaper is along the wearer's crotch. Next, for fixation, the fastening tape 6 near the edge of the side flap 5 or the outside thereof is pulled up slightly from the back side to the ventral side, and the side flap 5 is extended to the ventral side. Overlap on the non-skin side surface of the back sheet 2 of F. In this way, the fastening tape 6 is pressed against the landing tape 7 with the side flaps 5 extended, and is engaged with a mechanical fastener or the like (not shown) provided on the fastening tape 6. In this wearing state, the diaper 10 constitutes a waist opening Wo and a pair of leg openings Lo. Further, the diaper 10 includes a three-dimensional gathered elastic member 11 provided on a free edge that forms an orthostatic leak-proof cuff, a leg gather elastic member 12 on the outer side in the width direction, and a flap extending along the width direction of the back side portion R. The contraction of the elastic member 13 effectively realizes a stable wearing feeling and prevention of excrement leakage.

  By the way, the body part corresponding to the peripheral edge of the waist opening Wo of the diaper has a shape that draws a curve that is gently constricted around the waist from the swelling of the buttocks on the back side, with respect to the belly circumference with the swelling on the front side. . For this reason, normally, when the diaper is worn, the side flap 5 of the diaper may be strongly pulled so as to fit the rear side of the diaper and prevent slippage. On the other hand, in the diaper 10 of the present embodiment, as will be described later, the extensibility of the side flaps 5 is moderately suppressed / restricted, so that it is prevented from being pulled excessively, and the side flaps 5 are prevented from falling off or torn. . Moreover, it is easy to recognize that the side flaps 5 are stretched excessively, and compression around the stomach can be avoided. In addition, due to the stretchability of the side flaps 5, the pressure around the stomach can be suppressed even during movement during wearing.

Next, the panel member 50 which makes the side flap 5 of the diaper 10 of this embodiment is demonstrated with reference to FIG.2 and FIG.3. FIG. 2 is an exploded perspective view schematically showing a sheet member, an elastic member, and a thread-like member constituting the panel member 50 that becomes the overhang portion (side flap) 5 according to the embodiment of the present invention. 3A and 3B are a model plan view and a side view schematically showing how the panel member shown in FIG. 2 extends. FIG. 3A shows the extended state, and FIG. 3B shows the natural state. 2 and 3, in order to understand the characteristics (appropriate stretchability) of the panel member 50 itself, the model is shown separated from the shape of the diaper so that the movement of the material of the panel member can be understood. 2 and 3, the direction parallel to the vertical base line t is referred to as the Y direction, and the direction (width direction) perpendicular thereto is referred to as the X direction. The X direction is a direction that coincides with the extending direction of the panel member.
In this embodiment, the panel member 50 is a composite member having two sheet members 51 and 52 having extensibility, and a plurality of long thread-like members 53 and a plurality of elastic members 54 interposed between the two sheets. Yes (see FIG. 2). The elastic member 54 is a member having elasticity, and the thread-like member 53 is a member having lower extensibility than the sheet members 51 and 52. In this embodiment, “stretchability” means “when the force is released from a state where it is extended by 50% with respect to the original length (which is 150% of the original length). "The property of returning to a length of 113% or less". On the other hand, in this embodiment, “extensibility” is meant to include non-stretchability with low return force after elongation. In other words, “extensibility” means that it can be stretched by a desired required external force (external force during stretching or external force due to human power on the surface of use) and does not have the above-mentioned stretchable properties. It is a concept that includes.

  In the present embodiment, in the panel member 50 shown in FIG. 2, the sheet members 51 and 52 are both arranged to extend in the X direction, and the elastic member 54 extends in the X direction between the two sheets. A plurality of lines are intermittently arranged in the Y direction. The X direction is the extending direction of the panel member 50 (the diaper 10 is the width direction). Further, a plurality of thread-like members 53 are arranged between the sheet members 51 and 52 so as not to intersect with each other at a position not overlapping with the elastic member 54 (hereinafter, the one extending in the X direction is referred to as the first one). Also referred to as a single thread-like member group 53a). That is, both the elastic member 54 and the first thread-like member group 53a are arranged in a direction extending in the X direction. In the present embodiment, a plurality of thread-like members 53 are intermittently provided in the X direction so as to extend further in the direction (Y direction) substantially orthogonal to the elastic member 54 (hereinafter referred to as Y). Those extending in the direction are also referred to as second thread-like member group 53b). The first thread-like member group 53a and the second thread-like member group 53b thus arranged intersect to form a lattice arrangement. Here, “lattice arrangement” or “lattice shape” means a state in which closed figures composed of four intersections and sides connecting them are connected, and each figure is a square, rectangle, rhombus, etc. Alternatively, it may be configured by a curve or may not be uniform in size. However, among them, a lattice arrangement composed of uniform squares and rectangles as a whole is preferable from the viewpoint of flexible extensibility of the panel member described later. The extending direction of the elastic member 54, the sheet members 51 and 52, or the panel member 50 is not strictly limited to the X direction. When the diaper is attached, the side flap 5 is extended from the back side to the ventral side. Any direction from the direction base line t to the outside of the diaper in the width direction may be used. Further, the “outward in the width direction” includes not only the case of extending in only one direction but also the case of extending in multiple directions.

What is important in the present embodiment is that the non-stretchable thread-like member 53, in particular, the first thread-like member group 53a expresses good stretchability of the panel member 50 by suppressing and restricting excessive extension of the elastic member 54. That's what it means. Hereinafter, this operation will be described.
In the present embodiment, the panel member 50 is in a state of being contracted with wrinkles in a wavy shape due to contraction of the elastic member 54 in its natural state (see FIG. 3B). When a tensile force f is applied to the panel member 50 in the X direction from this state, the elastic member 54 is extended, and the extension of the panel member 50 is extended as a result of this extension (see FIG. 3A). Normally, when the elastic member 54 is further extended from there, the sheet members 51 and 52 are distorted and try to extend while shrinking in width in the Y direction (neck-in). On the other hand, in the present embodiment, the first thread-like member group 53a inside the panel member 50 restricts excessive extension of the elastic member 54 and the sheet members 51 and 52. This is because the first thread-like member group 53a extends in the same X direction as the elastic member 54, so that the elastic member 54 extends within the range of the extension of the first thread-like member group 53a (or the length of the member itself). By being limited. Thereby, excessive distortion generated in both the sheet members can be avoided, and the panel member 50 as a whole can be maintained in a certain stretched state. As described above, since the conventional panel member does not suppress or limit the extension, a tightening force more than appropriate adhesion is exhibited after mounting, but in the present invention, moderate mounting after mounting. Sex has been expressed. In addition, since the neck-in is suppressed, a high tightening force does not work locally due to the narrowed panel member, and it is possible to prevent body troubles on the skin or the like due to wearing due to compression, rubbing, or the like.

Furthermore, in the present embodiment, the second thread-like member group 53b intersects the first thread-like member group 53a to form a lattice arrangement, which is preferable because excessive extension of the panel member 50 can be effectively suppressed. Specifically, the second thread-like member group 53b extending in the Y-direction acts to further prevent the sheet members 51 and 52 from shrinking (neck-in) in the Y-direction, and this action and the above-described first thread-like member group 53a. Due to the synergistic effect with the action, it is possible to suppress the panel member 50 from being extended while being excessively deformed. From another point of view, it is possible to prevent deformation of the overall shape of the panel member 50 in a so-called skeleton by using a multi-connected grid formed by the first thread-like member group 53a and the second thread-like member group 53b. This point will be described below with reference to a lattice portion P ₁ composed of _four intersections (pivotal axes) S _{1 to} S ₄ shown in FIGS. 3 (a) and 3 (b). The lattice portion P ₁ is a square shape in which the thread-like member 53 connects _four intersections (pivotal axes) S _{1 to} S ₄ and has four sides, but in a natural state, the lattice portion P ₁ is contracted in the X direction. When the grating portion _{P 1} with respect to the tensile force f is applied to the X-direction, along with extension of the elastic member 54 extends the distance between between _S 1 -S ₄ in the positional relationship in the same direction and _S 2 -S _3. On the other hand, between the intersections in the positional relationship in the Y direction _{(between S 1 -S 2, S 3 -S} 4 between) between, or between the intersections in the diagonal positional relationship _(S 1 -S _3, while S 2 -S ₄ ) Does not coincide with the direction of the tensile force f and is not easily affected. The lattice portion P ₁ returns to the original square by the tensile force f, and extends to some extent due to the extensibility of the members including the sheet members 51 and 52 or the thread-like member 53. However, excessive stretching is suppressed in the sheet member by the structure of the grating portion P ₁ consisting of the thread-like members 53, extension of the elastic member 54 can be suppressed to the range. If the whole panel member 50 formed by connecting a large number of the lattice portions is observed, excessive extension is suppressed by maintaining the shape of each lattice portion. In addition, in this embodiment, it is preferable from the viewpoint of effective expansion suppression of the panel member 50 that the extensibility of the thread member 53 is lower than that of the sheet members 51 and 52.

  Thus, in this embodiment, since the expansion | extension of the panel member 50 is moderately restrained by the thread-like member 53, it can prevent excessive tension | tensile_strength in the conventional diaper. Moreover, since the extensibility of the panel member 50 is kept constant by the thread-like member 53, when this is applied to the side flap 5 of the diaper 10, it helps the wearer to recognize that the panel member 50 is pulled too much. A diaper can be always mounted | worn in the fixed expansion | extension state of the flap 5, and the operativity at the time of mounting | wearing will become favorable. That is, according to the diaper 10 of the present embodiment, it is possible to appropriately adjust the tensile strength of the side flap 5 without excessive care. Thereby, the unevenness of the tensile strength for every diaper wearing can be suppressed, and the pressure around the stomach due to excessive tightening of the diaper can be prevented.

Moreover, in this embodiment, the said panel member 50 can exhibit moderate extensibility with respect to the tensile force from directions other than a X direction. This is because the first thread-like member group 53a and the second thread-like member group 53b rotate about the intersection point along the external force other than the X direction. For example, when a tensile force f ₁ upward in the right direction is applied to the longitudinal base line t, the thread-like member 53 extending in two directions tries to deform like a pantograph so as to go in the direction of the tensile force f ₁ at each intersection. To do. As a result of this deformation, the sheet members 51 and 52 are distorted and extended as a whole. This elongation is due to the extensibility of the sheet members 51 and 52 and the thread-like member 53 and the lattice-shaped deformation that the thread-like member 53 makes. In this regard, as follows will be described in the grating portion P ₁ of the foregoing. When the tensile force f ₁ is applied along the diagonal direction between the intersections S ₂ and S ₄ , each side turns as a pivot and each side rotates. Specifically, each intersection angle α at the intersections S ₂ and S ₄ is reduced, and each intersection angle β at the intersections S ₁ and S ₃ is increased. As the crossing angle β increases, the lattice portion P ₁ is deformed into a rhombus that is elongated so that each side is along the direction of the tensile force f ₁ . In the panel member 50 as a whole, the sheet members 51 and 52 extend in the direction of the tensile force f _{1 with} an appropriate strain as the lattice portions are deformed. In addition, since there is a limit in the change of the crossing angle β, the thread-like member 53 suppresses the expansion of the sheet members 51 and 52 at the limit. On the contrary, when the extension suppressing force is extended to a predetermined length, a reaction force is generated and a contraction force is generated in the entire panel member 50. As a result, it exhibits a specific stretchability in which the stretch width is moderately constrained so as not to greatly extend to the breaking limit of an elastomer or a general stretchable sheet. In other words, as the physical properties of the member, it can be said that the rise of the SS curve shows a sharp expansion / contraction behavior. The limits of the change angles of the crossing angles α and β are, for example, the frictional resistance between the thread members 53 at the intersection, the length of the thread members 53, the angle and strength at which the tensile force f ₁ acts on the panel member 50, and S ₁ to. It is believed that figure which is closed consists of four intersections of S ₄ is defined by such a state of being connected.

  As described above, in this embodiment, when the panel member 50 that can be appropriately extended in multiple directions is applied to the side flap 5 of the diaper 10, a good fit can be provided to the wearer. For example, even if a wearer in need of nursing care wearing a diaper turns over in bed or raises the upper body for a meal, the side flaps 5 are appropriately stretched in many directions and the stomach is expanded. It avoids the pressure around you and responds flexibly to changes in your stomach, giving you a good fit.

Normally, in the case of a panel member made of a stretch sheet with a single structure sheet or an elastic member, when the width shrinkage (neck-in) phenomenon due to strain occurs almost uniformly by pulling, the root part that is the joint end with the article body 59 is a deformed base end, and an inward load between the end portions other than the influence of the pulling direction is given to the end portion. However, in the present embodiment, such a pulling force other than the X-direction (e.g. the like tensile force f ₁₎ strain occurring in the panel member 50 by do not necessarily occur uniformly in each part. For example, positioned in the vicinity of the grating portion P ₂ are fastening tape 6 in FIG. 3, in the grating portion P ₃ located at the base portion 59 near the body 10a, in these positions located grating portion P ₁ X The deformation is constrained compared to the central part of the direction. Therefore, in the grating portion P ₂ through grating portions P _3, strain caused by the stress than the lattice portion P ₁ is small, and that the width shrinkage is suppressed. Similarly, the root portion 59 is also fixed to the article body 10a, so that deformation is limited. Furthermore, the thread-like member 53 has low elongation (preferably non-extension), and is preferably arranged in a lattice configuration composed of squares or rectangles so that the fastening portion of the fastening tape 6 and the root portion 59 and the vicinity thereof are tensioned. The width shrinkage due to the force is suppressed, and the stretchability of the panel member 50 is difficult to express. Accordingly, the panel member 50 as a whole has a width shrinkage (neck-in) mainly in the center portion in the X direction. However, as compared with a general stretchable sheet, the panel member 50 according to the present embodiment is fixed to the root portion 59 as described above. Since the deformation of the portion and its vicinity is limited, the load applied to the root portion 59 is not large, and breakage such as tearing of this portion can be prevented. Further, as described above, in the panel member 50 of the present embodiment, excessive pulling is suppressed, and this action combined therewith does not apply an excessive load to the entire panel member 50, and the side flaps 5 are more effectively applied. Damage to the root portion can be prevented.

  In the present embodiment, since the sheet members 51 and 52 have only the elastic elasticity that is suppressed together with the thread-like member 53, the force (stress / positive strain) that tries to return after mounting while maintaining the stretched state at the time of mounting. Small compared to conventional elastic members. Further, in the present embodiment, the sheet members 51 and 52 are multidirectional between the X direction and the Y direction of the panel member 50 as long as they are within the range of the change angles α and β formed by the intersections of the thread members 53. Deformation can be tolerated. When the panel member 50 having such a structure is applied to the side flap 5 of the diaper 10, even if the side flap 5 is pulled strongly when the diaper 10 is attached, the panel member 50 has an appropriate stretchability of the side flap 5. Therefore, the diaper can be appropriately deformed so as to reduce the pressure while being fitted to the body. Further, when the diaper 10 is mounted, even if the diaper 10 cannot be recognized as being pulled too much and is mounted in an excessively stretched state, the deformation of the panel member 50 can instantly correspond to the tensile force applied in a short time. Therefore, the fastening tape 6 is attached to the article main body with the side flaps 5 being properly extended before reaching the limit of extension, and after installation, slipping due to loosening of the diaper accompanying body shape change is prevented. However, it can be appropriately deformed so as to reduce the pressure to the extension limit of the panel member.

  In the present embodiment, from the viewpoint of preventing the side flaps 5 from being pulled too much and imparting appropriate extensibility, the arrangement interval of the elastic members 54 is 5 to 5 at a position that is parallel to the first thread-like member group 53a in the X direction and does not overlap. 20 mm is preferable, and 7 to 15 mm is more preferable. Moreover, it is preferable that the said space | interval is the same as the space | interval between each filamentous member of the 1st filamentous member group 53a. Furthermore, it is preferable that at least two elastic members 54 are arranged in the Y direction, and the length of the overhang portion (side flap) 5 in the Y direction is three times or more the interval between adjacent elastic members, It is preferable that the elastic member 54 exists in the range of 10 to 90% of the length in the longitudinal direction (Y direction) of the overhang portion 5. The crossing angle between the elastic member 54 and the second thread-like member group 53b is preferably 5 to 135 °.

In the present embodiment, from the viewpoint of moderate stretchability of the side flap 5 and prevention of excessive tension, the elongation ratio (Eba) of the sheet members 51 and 52 is preferably 10 to 100% (0.3 N load / 50 mm), and 20 -80% is more preferable, and 20-50% is especially preferable. From the same point of view, the elongation rate (Ebb) of the thread-like member 53 is 0 to 10% (one load is calculated by dividing the 0.3N load by the number of thread-like members at 50 mm, and in the example shown, 3 Since it is a book, 0.1N load / piece) is preferable, and 0 to 5% is more preferable. Further, the difference in maximum elongation between the sheet members 51 and 52 and the thread-like member 53 (ΔE = Eba <max> −Ebb <max>) is preferably 2 to 95%, more preferably 2 to 70%. -40% is particularly preferred. In particular, in the difference in the maximum elongation (ΔE), by setting the above lower limit value or more, the extensibility of the fiber sheet is superior to the lattice arrangement of the thread-like member, and appropriate extensibility is imparted to the side sheet. By making it below the value, rapid elongation of the fiber sheet and elongation up to the breaking limit can be prevented by the lattice arrangement of the thread-like member, and gentle elongation recovery can be imparted. In the present embodiment, the inclination angle (θ ₁ , θ ₂ ) of the first thread-like member group 53a with respect to the longitudinal base line t can be selected in the range of _{1 to} 90 °, but the thread-like member has an appropriate extensibility. From the viewpoint of suitable deformation of the lattice shape formed, 30 to 70 ° is preferable, and the crossing angle (α, β) between the first thread-like member group and the second thread-like member group 53b is such that β is 5 to 135 °. preferable. Also, the interval between the parallel adjacent thread members is preferably 5 to 20 mm, more preferably 7 to 15 mm, and the thread members of the second thread member group 53b in which the length of the overhang portion 5 in the X direction is parallel. It is preferable that it is 3 times or more of the interval. The elongation rate of each material in the present invention is the elongation rate under each load condition, and the maximum elongation rate is an elongation rate measured with the load at the time of breakage (material failure) of the panel member 50 as the maximum load ( A method for measuring the elongation rate will be described later.) Therefore, in the present invention, when the maximum load is applied to the measurement piece in the width direction of the absorbent article, the sheet members 51 and 52 are larger than the thread-like member 53 when the elongation rate at that time is compared. preferable. In addition, when the filamentous member 53 is arrange | positioned like the diagonal grid | lattice arrangement | positioning by the panel member 50, let the elongation rate measured according to the width direction the filamentous member be the maximum elongation rate of a filamentous member.

Hereinafter, the material of the member which comprises the expansion | deployment type disposable diaper of this embodiment is demonstrated.
[Sheet material]
As a material of the sheet members 51 and 52, a film material, a fiber material, a thin paper (for example, natural paper, synthetic paper), or the like can be used. In addition, the sheet member may or may not have extensibility, but an appropriate extensibility of the overhang portion 5 as a whole can be arbitrarily set to follow a good feeling of wearing the article and change in posture after wearing. From the viewpoint of imparting properties, it is preferable to have extensibility. “Extensible” when having extensibility also includes non-stretchable properties as described above. Regarding the extensibility, when the material is a non-woven fabric, (a) when the constituent fiber itself of the non-woven fabric elongates, and (b) even if the constituent fiber itself does not elongate, the fibers bonded at the intersection are separated. Or when the three-dimensional structure formed by a plurality of fibers is structurally changed due to bonding of fibers, the constituent fibers are broken, the slack of the fibers is stretched, and the whole nonwoven fabric is stretched. Include. In addition, when the material is a film material, (i) when the molecular chain of the constituent resin itself of the film extends or deviates, and (b) the film does not extend even if the constituent resin itself does not extend. Partial tearing (including slit apertures, partial apertures, particle-resin interface peeling, etc.), slack in the film is stretched, or the entire film is stretched due to deformation of the aperture as in an apertured film Is included. Furthermore, when the material is thin paper, (i) when the constituent fibers of the thin paper are stretched, and (b) even if the constituent fibers themselves are not stretched, the bonded fibers are separated or the fibers are This includes a case where the three-dimensional structure formed by a plurality of fibers is structurally changed due to bonding or the like, the constituent fibers are torn off, or the slack of the fibers is stretched to stretch as a whole thin paper.

  As the film material, for example, a water-impermeable or water-permeable material, a moisture-permeable or water-impermeable material can be adopted. In particular, a film that is water-impermeable and moisture-permeable (hereinafter also referred to as a non-stretchable moisture-permeable film) is preferable from the viewpoint of preventing stuffiness. As this non-stretchable moisture permeable film, for example, a resin composition obtained by kneading a material incompatible with the resin into a thermoplastic resin is melt-molded into a film shape, and the obtained film is uniaxial or Biaxially stretched to be porous. Examples of the thermoplastic resin that can be used include polyolefins such as polyethylene, polypropylene, and olefin copolymers. Examples of substances that are not compatible with thermoplastic resins include calcium carbonate, gypsum, calcium sulfate, calcium phosphate, magnesium carbonate, magnesium sulfate, hydrated silicic acid, anhydrous silicic acid, soda ash, sodium chloride, sodium sulfate, and barium sulfate. Inorganic fillers such as talc, clay, various cements, volcanic ash, shirasu, titanium oxide, iron oxide and carbon black, various metal powders, other inorganic substances, and organic metal salts mainly composed of inorganic substances. Moreover, polymers such as thermosetting resins such as phenol resin, epoxy resin, and sodium polyacrylate, or resins having a melting temperature higher than the molding temperature of the thermoplastic resin are mentioned. These substances are desirably used as a granular material having an average particle diameter of 50 μm or less, preferably 0.05 to 30 μm, particularly about 0.1 to 5 μm. The blending ratio of the thermoplastic resin and the substance is preferably 50 to 400 parts by weight, more preferably 60 to 300 parts by weight with respect to 100 parts by weight of the thermoplastic resin.

  As said nonwoven fabric, what consists of a substantially inelastic fiber is employable, for example. Examples of the fibers forming the nonwoven fabric include fibers made of polyethylene (PE), polypropylene (PP), polyester (PET or PBT), polyamide, and the like. The fibers constituting the nonwoven fabric may be short fibers or long fibers, and may be hydrophilic or water repellent. Further, core-sheath type or side-by-side composite fibers, split fibers, irregularly shaped cross-section fibers, crimped fibers, heat-shrinkable fibers, and the like can also be used. These fibers can be used singly or in combination of two or more. The nonwoven can be a continuous filament or short fiber nonwoven.

[Threaded member]
The thread-like member 53 is a member whose maximum elongation rate is smaller than the maximum elongation rate of the sheet member. The material for forming the thread-like member is preferably a material having no extensibility (maximum elongation rate is 0%). Specifically, for example, a PP net in which polypropylene (PP) fibers are formed in a lattice arrangement, a fiber such as polyester, nylon, or the like can be employed.

(Measurement method of elongation rate)
The maximum elongation rate (Eb <max>) is an elongation rate of the measurement target member measured by a load when the panel member breaks (material fracture). The measuring method is performed as follows using, for example, a Tensilon tensile tester [model number: RTA-100, manufactured by Orientec Co., Ltd.]. First, both ends of the test piece are sandwiched between chucks. The panel member is extended in the direction corresponding to the diaper width direction at a crosshead moving speed of 300 mm / min until the panel member breaks. From the result of measuring each constituent material of the panel member up to the load at the time of breakage by the same method, the maximum elongation rate is obtained from the measured length after elongation and the length of the natural state before elongation based on the following formula. The length before and after extension is a value obtained by subtracting the length of the portion where both ends of the test piece are chucked.
Elongation rate (%) = {(Length after stretching−Length before stretching) / Length before stretching)} × 100%
In addition, as a test piece, the sheet | seat members 51 and 52 and the thread-like member 53 which comprise the panel member 50, the panel member 50 are used. For the sheet member, one sheet material used for the side flap 5 is used, and for the thread-like member, the actual number of members used for the side flap 5 (three in the illustrated example) is used. Measure in parallel and perpendicular to the chuck.

[Elastic member]
As the material of the elastic member 54 in the present embodiment, a normal material used for this type of article can be employed. For example, examples of the material include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, polyurethane, and the like. The shape is rectangular, square, circular, polygonal. A thread-like or string-like one (such as flat rubber) or a multifilament type thread-like one can be used.

[Manufacturing method of panel member]
The panel member 50 in this embodiment can be manufactured using the method used for this kind of article. For example, a fiber material assembled in a lattice shape is sandwiched between air-through nonwoven fabrics and partially fixed by dot embossing or spiral hot melt coating, or a fiber material assembled in an oblique lattice shape is arranged between fiber webs. In addition, an air-through method, a heat roll method, or the like in which heat setting is performed by hot air treatment may be used.

  The panel member 50 is preferably provided with a non-woven sheet having extensibility, an extensibility thread-like member lower than this, and an elastic member, and is formed by forming an integral sheet by the above-described means. And a slower elongation recovery than the elastic member alone. This is because the non-woven fabric is integrated between the thread members, so that the deformation of the lattice shape by the thread member due to the tensile force is integrated within the lattice shape (for example, partial compression / stretching of the non-woven fabric) In order to cause the loss of non-woven fabric uniformity such as the distribution of high and low fiber amount, etc., it is thought to be caused to eliminate distortion.

[Other materials]
As a material for forming the top sheet 1, the back sheet 2, the absorbent body 3, and the side sheet 4, those normally used for absorbent articles can be used.
The surface sheet 1 is preferably a hydrophilic non-woven fabric, and is a non-woven fabric called an air-through non-woven fabric, a point-bonded non-woven fabric, a spun-bonded non-woven fabric, a spunlace non-woven fabric or a three-dimensional shaped non-woven fabric. Fibers that have been hydrophilized with polyethylene composite fibers, polyethylene terephthalate and polyethylene composite fibers, and the like are preferred, and those having a basis weight of 15 to 50 g / m ² can be suitably used. Further, a hydrophilic perforated film or a hydrophilic nonwoven fabric may be partially overlapped on the crotch portion of the topsheet 1 on the non-skin surface side of the topsheet 1.

  The material for forming the back sheet 2 is not particularly limited as long as it is waterproof and moisture permeable. For example, a hydrophobic inorganic resin and a minute inorganic filler made of calcium carbonate or the like, or an incompatible organic material. Examples thereof include a porous film obtained by melt-kneading a polymer or the like to form a film, and uniaxially or biaxially stretching the film. Examples of the thermoplastic resin include polyolefin. Examples of the polyolefin include high to low density polyethylene, linear low density polyethylene, polypropylene, polybutene and the like, and these can be used alone or in combination.

As a material for forming the absorbent body 3, those normally used for absorbent articles can be used. Specifically, for example, as the absorbent core, a fiber assembly or a combination of this and an absorbent polymer can be used. As the fibers constituting the fiber assembly, hydrophilic natural fibers such as pulp fibers, synthetic fibers (preferably subjected to hydrophilic treatment), and the like can be used. The basis weight is not particularly ^limited, preferably ^{150g / m 2 ~500g / m 2} . In addition, as a covering sheet for covering the absorbent core, thin paper (thin paper) such as hydrophilic tissue paper, non-woven fabric made of hydrophilic fibers such as cotton and rayon, and synthetic resin fibers are subjected to a hydrophilization treatment. What consists of nonwoven fabrics (composite nonwoven fabrics, such as SMS, SMMS, and SSMS) can be used.

  The side sheet 4 is preferably a water-repellent nonwoven fabric, and specifically, a spunbond nonwoven fabric, a spunbond-meltblown (SM) nonwoven fabric, a spunbond-meltblown-spunbond (SMS) nonwoven fabric, or the like is used. As the three-dimensional gathered elastic member 11 of the side sheet 4 and the other, the leg gathered elastic member 12 and the flap elastic member 13 may be ordinary elastic members used in this type of article. -Synthetic rubber such as butadiene, butadiene, isoprene, neoprene, natural rubber, EVA, stretchable polyolefin, polyurethane, etc. can be mentioned, and the form is a thread shape or string shape such as rectangular, square, circular, polygonal cross section (Flat rubber, etc.) or multifilament type thread-like materials can be used.

  In the wearing article of the present invention, the extending direction of the thread member 53 and the elastic member 54 is not limited to the strict X direction or Y direction of the present embodiment, and may have an inclination. The first thread-like member group 53a and the elastic member 54 are not limited to a strictly parallel arrangement as long as they extend in the width direction outward, and the second thread-like member group 53b and the elastic member 54 are arranged so as to cross each other. If it exists, it will not be limited to the arrangement | positioning strictly orthogonally. The intersection angle between the first thread-like member group 53a and the second thread-like member group 53b can be arbitrarily set. The number of the thread-like elastic members 53 and the elastic members 54 can be arbitrarily set as necessary.

  The wearing article of the present invention is not limited to adults in the above embodiment, but may be an unfolded disposable diaper or diaper cover for infants, and is a pants-type disposable diaper that can be used as a tape when partially broken. It may be a diaper, a urine collection pad, a sanitary napkin, a panty liner, or a light incontinence pad.

DESCRIPTION OF SYMBOLS 1 Top sheet 2 Back sheet 3 Absorber 4 Side sheet 5 Overhang part (side flap)
50 Panel members (composite members)
51, 52 Sheet member 53 Thread member 54 Elastic member 6 Fastening tape 7 Landing tape 10 Unfoldable disposable diaper

Claims (8)

It has a longitudinal direction from the abdominal side part to the back side part across the crotch part and a width direction perpendicular thereto, and is disposed on both side edges of the article main body and at least one of the abdominal side part and the back side part. A wearing article having an overhang part,
The overhang portion includes a sheet member, a plurality of elastic members, and a plurality of thread-like members,
Both of the plurality of elastic members and the thread-like member extend outward in the width direction and are disposed on the sheet member, and the elastic member is disposed in an expanded state and can be contracted when the expanded state is released. Wearing articles.   The extending directions of the plurality of thread-like members are two directions, ie, the direction extending outward in the width direction and the direction intersecting with the two directions, and the thread-like members extending outward in the width direction are arranged so as not to intersect the elastic member. The wearing article according to claim 1.   The wearing article according to claim 2, wherein the plurality of thread-like members extending in the two directions are arranged in a lattice perpendicular to each other.   The said overhang | projection part is a wearing article of Claim 3 which has a stretching property to a diagonal direction with respect to the said orthogonal thread-like member.   The wearing article according to claim 1, wherein the sheet member has extensibility, and the thread-like member has lower extensibility than the sheet member.   The wearing article according to any one of claims 1 to 5, wherein an elongation rate (Eba) of the sheet member is 10 to 100% (0.3 N load / 50 mm).   The difference (ΔEb) between the maximum elongation rate (Eba <max>) of the sheet member and the maximum elongation rate (Ebb <max>) of the filamentous member is 2% to 95%. Articles to wear.   The composite member formed by the sheet member, the elastic member, and the thread member that forms the overhang portion is a member independent of the article body, and the side edge of one side of the composite member that forms the overhang portion is the width of the article body. The wearing article according to any one of claims 1 to 7, wherein the wearing article is bonded to the direction side edge and has a fixing means on a side opposite to the bonded side of the composite member.

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