JP2007125181A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article suppressing leakage of discharge. <P>SOLUTION: The nearly longitudinal absorbent article 1 comprises: a liquid-permeable front surface sheet 2; a liquid-impermeable rear surface sheet 3; and an absorber 4 arranged between the front surface sheet 2 and the rear surface sheet 3. The absorbent article 1 is provided with: a center absorption part 40 formed nearly at the center of a width direction of the absorbent article 1; and supporting parts 7A and 7B formed on both side parts 41A and 41B of the center absorption part 40 and formed from the front areas to the rear areas of both side parts 41A and 41B. The supporting parts 7A and 7B are formed to be nearly linear or to be curved gently extending nearly in parallel in the longitudinal direction of the absorbent article 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an absorbent article.

  As a sanitary napkin suitable for menstruating women to wear at bedtime etc., it has a long vertical dimension, is provided with a folded flap part that protrudes in the lateral direction on the front side, and both lateral sides in the rear side What is provided with the rear flap part which protrudes in is used. Furthermore, a sanitary napkin that effectively suppresses leakage by forming a leak-proof wall (gather) on the skin side surface is used.

  Here, in order to suitably suppress the rearward leakage, for example, a rear flap part (hip part) 820 is formed behind the folded flap part 810 wound around the crotch part of the underwear in FIG. 8, and the rear flap part (hip part) ) 820 has a side edge substantially parallel to the product longitudinal center line, and a rear pressure-sensitive adhesive layer 855 is provided in front of the rear flap portion (hip portion) 820. This rear pressure-sensitive adhesive layer 855 proposes a sanitary napkin provided in front of the rear end of the leak-proof wall (gather) 830 and the rear end of the main absorption region (hinge) 870 (see, for example, Patent Document 1).

  Moreover, in order to reliably supplement the excrement from the excretion part, it is desired that the skin side surface is brought into close contact with the excretion part of the body. For example, a sanitary napkin configured to be in close contact with the excretory part by using a raised part with a thickened absorbent body at the center is used.

Here, in order to improve the adhesion to the excretion part, for example, a first crimping part (outer hinge) and a second crimping part (inner hinge) are provided on both sides of the central absorbent part 940 in FIG. A sanitary napkin with a support part with high density and rigidity at the part sandwiched between the hinge and the inner hinge, which receives lateral compression from the thigh while attached to the crotch cloth of the underwear A sanitary napkin that is bent at the outer hinge and the inner hinge, and the support part enters under the central absorption part and pushes up the central absorption part so as to adhere to the excretion part of the body has been proposed (for example, , See Patent Document 2).
JP 2005-7144 A JP 2004-154153 A

  In Patent Document 1, since the hip portion is firmly fixed by the rear pressure-sensitive adhesive layer 855, the leak-proof wall (gather) 830 is difficult to move, and the leak-proof wall (gather) 830 and the hip portion located outside thereof are slanted. Leaking backward can be effectively suppressed. That is, it prevents the leakage barrier (gather) 830 from entering the inside, exposes the absorption surface widely, and arranges the rear pressure-sensitive adhesive layer 855 in front of the gather fixing seal and hinge so that it is firmly attached to the shorts. To prevent the rear part from entering due to the tightness of the shorts. However, when the sleeping posture is on its back, the rear part of the napkin is crushed by the body pressure, so the gathers do not stand up, and leakage from an oblique rear side may not be suppressed.

  Moreover, in patent document 2, since the center absorption part 940 is pushed up and it adheres to an excretion part, excretion can be absorbed suitably. That is, a support portion 930 having a high density and high rigidity is provided at a portion sandwiched between the outer hinge 910 and the inner hinge 920. When the support portion 930 receives a lateral compression force from the thigh, the support portion 930 is bent at the outer hinge 910 and the inner hinge 920, and the support portion 930 enters under the central absorption portion 940, so that the central absorption portion 940 is moved into the body excretion portion. Exhibits the function of pushing up so that it adheres closely. Thereby, since the center absorption part 940 closely_contact | adheres to an excretion part, excretion can be absorbed suitably and a leak can be suppressed. Here, the spacing between the support portions 930 is the narrowest at the position of the horizontal reference line in the center, and the support portion 930 gradually moves away from the vertical center line as it moves away from the horizontal reference line to both sides in the vertical direction. However, in such a shape, it is difficult to transmit the lateral compression force received by the thighs to the rear of the central absorption part. And these may be the subject of the present invention.

  This invention is made | formed in view of the above subjects, and it aims at providing the absorbent article which suppresses the leakage of excrement.

  In order to achieve the above-mentioned object, the inventors have formed a central absorption portion by forming a support portion formed on a side portion of the central absorption portion that mainly absorbs excrement in a substantially linear shape or a gentle curved shape. It has been found that not only the front area and the central area in the longitudinal direction of the part but also the rear area can be brought into close contact with the excretion part, and leakage of excrement can be suitably suppressed, and the following absorbent article has been invented.

  (1) A substantially vertically long absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. A central absorbent portion formed substantially at the center in the width direction of the absorbent article, and support portions formed on both side portions of the central absorbent portion, the support formed from the front region to the rear region on both side portions. And the support portion is formed in a substantially linear shape or a gently curved shape extending substantially parallel to the longitudinal direction of the absorbent article.

  According to the invention of (1), the absorbent article is a central absorbent part formed at the approximate center in the width direction of the absorbent article, and a support part formed on both side parts of the central absorbent part. And a support part formed from the front area to the rear area in the part, and the support part is formed in a substantially straight line shape or a gentle curve shape extending substantially parallel to the longitudinal direction of the absorbent article. Thereby, for example, the force inward in the width direction applied to the support portion in the front region and the central region can be transmitted to the rear region. In other words, for example, when force is applied to the inner side in the width direction from the thigh, when the support portion is inclined in the thickness direction to support the central absorption portion from below (underwear side), the force is applied to the thigh. Not only the central absorption part in the front area and the central area, but also the central absorption part in the rear area is pushed up to the excretion part (body) side, and leakage of excrement can be suitably suppressed.

  A support part is formed from the front area in the both sides of a center absorption part to a back area. That is, it is formed from a predetermined position in the front area, which is the front side, to a predetermined position in the rear area, which is the rear side, from a predetermined position in the front area, which is the front side, when the central absorbent portion is divided into three in the longitudinal direction. It forms so that the side part of a center absorption part can be supported entirely.

  The support portion is formed in a substantially straight line shape or a gentle curve shape substantially parallel to the longitudinal direction of the absorbent article. As described above, this is because the force applied to the inner side in the width direction in the front area and the center area can be transmitted to the rear area. For example, when the shape of the support portion in the front region or the central region is a steep curve curved toward the center in the width direction, the force applied to the inner side in the width direction in the front region or the center region is transmitted to the rear region. Absent. That is, the central absorption part in the rear region cannot be pushed up to the excretion part side. Here, by forming the support portion in a substantially straight line shape or a gentle curve shape substantially parallel to the longitudinal direction, it is possible to transmit the force to the rear region, and to push up the central absorption portion in the rear region to the excretion portion side. it can.

  For example, the support portion has a predetermined rigidity so as not to be deformed by a force applied by the thigh. In order to have a predetermined rigidity, for example, a predetermined member can be disposed, or a predetermined high rigidity process can be performed. Examples of the rigid member include cardboard and thin plate-like resins. Examples of the process for increasing the rigidity include a predetermined compression process and a process for applying an adhesive to a predetermined area. Further, for example, a support portion having a predetermined rigidity can be formed by arranging the absorbers in the support portion at a high density as will be described later.

  For example, when the absorbent article in the present invention is used in a sleeping posture in which the body is laid down, leakage of excrement can be suitably suppressed. In particular, leakage of excrement from the rear side of the absorbent article can be suitably suppressed. The absorbent article of the present invention can be suitably used as an absorbent article for sleeping, for example.

  (2) The central absorbent portion is formed so as to protrude in the thickness direction, and the support portion is inclined so as to form a predetermined angle with respect to the thickness direction in a state where the central absorbent portion protrudes, The absorbent article as described in (1) which supports from the front area of a longitudinal direction in a center absorption part to a back area.

  According to the invention of (2), the absorbent article is formed so that the central absorbent portion can protrude in the thickness direction, and the support portion has a predetermined angle with respect to the thickness direction in a state where the central absorbent portion protrudes. It tilts so as to make a support from the front area in the longitudinal direction to the rear area in the central absorbent portion. Thereby, from the front area to the rear area of the central absorption part is pushed up to the excretion part side, excretion from the excretion part can be surely absorbed and leakage of excrement from the rear side can be suppressed.

  (3) The support portion is substantially linear in the front region, and has a gently curved shape that bulges outward in the width direction in a central region between the front region and the rear region, and the rear region. The absorbent article according to (1) or (2), wherein the absorbent article is substantially linear.

  According to the invention of (3), the support part in the absorbent article is substantially straight in the front region, and is a gentle curve that swells outward in the width direction in the central region between the front region and the rear region. In the rear region, it is substantially linear. As described above, the support part is formed by a thigh part or the like in the front area or the central area as described above by being formed in a substantially straight line shape and a gentle curve shape substantially parallel to the longitudinal direction of the absorbent article. Force can be transmitted to the rear side in the width direction. Thereby, since the center absorption part in a back region can be pushed up to the excretion part side, the leakage from the back side of excrement can be controlled suitably.

  (4) The support portion has an absorption portion support index of 0.80 or more expressed by a ratio of a distance in the longitudinal direction of the support portion to a distance in the longitudinal direction at the side portion of the central absorption portion (1). To the absorbent article according to any one of (3) to (3).

  According to the invention of (4), the absorbent article has an absorbent part support index of 0.80 or more, preferably expressed by the ratio of the distance in the longitudinal direction of the support part to the distance in the longitudinal direction at the side part of the central absorbent part. Is 0.85 or more, more preferably 0.90 or more. By comprising so that an absorption part support index may be 0.80 or more, the side part in a center absorption part can be supported entirely. Thereby, in the state which the center absorption part protruded in the thickness direction, the side part of this center absorption part can be supported from the downward direction (underwear side) entirely.

  (5) A first liquid-proof groove in which a predetermined pressure-bonding part is continuously formed so as to surround the central absorption part, and the pressure-bonding part is continuously formed outside the first liquid-proof groove. A first U-shaped portion that is formed in a substantially U-shape projecting forward in the longitudinal direction, and the front U-side. A rear side formed in a substantially U shape that connects the inner side part extending in the longitudinal direction so as to be continuous from both ends of the character part and the rear side end part in the inner side part and projects rearward in the longitudinal direction A U-shaped portion, and the second liquid-proof groove includes an outer side portion formed to extend in the longitudinal direction at substantially equal intervals from the inner side portion, and a rear side end portion of the outer side portion. And an outer U-shaped part formed in a substantially U shape projecting rearward in the longitudinal direction. Parts are absorbent article according to any one of formed (1) of (4) between the outer side portion and the inner side portion.

  According to the invention of (5), the absorbent article includes a first liquid-proof groove formed so that the support portion surrounds the central absorbent portion, and a first liquid-proof groove formed outside the first liquid-proof groove. Between the two liquid-proof grooves. Thereby, a support part can be formed along the side part of a center absorption part. Furthermore, the first liquid-proof groove and the second liquid-proof groove formed on the side part of the support part function as a predetermined bent part, and the support part is preferably in a state where the central absorption part protrudes. By tilting at a predetermined angle with respect to the thickness direction, it is possible to support from the front area to the rear area in the longitudinal direction of the central absorbent portion. Moreover, a support part can be formed by arrange | positioning in this way, without arrange | positioning a specific member. Further, for example, as described later, the support portion having a predetermined rigidity can be formed by increasing the density of the support in the support portion.

  (6) The absorbent article according to (5), wherein the support portion is configured such that the absorbent body is arranged at a high density with respect to the central absorbent portion.

  According to invention of (6), as for an absorbent article, a support part arrange | positions an absorber with high density with respect to a center absorption part. Thereby, since the support portion has higher rigidity than the rigidity in the central absorption portion, for example, in the thickness direction without being greatly deformed by the force applied to the inner side in the width direction in the front region or the central region in the support portion. By tilting to form a predetermined angle, the central absorption part can be pushed up to the excretion part side and supported.

  (7) The absorbent article according to any one of (1) to (6), wherein the central absorbent portion includes a low-rigidity portion with reduced rigidity.

  According to the invention of (7), in the absorbent article, the central absorbent portion includes a low-rigidity portion whose rigidity is reduced. For example, the low-rigidity portion refers to a region that is low-rigid with respect to a region adjacent to the low-rigidity portion in the central absorption portion. For example, it is possible to reduce the rigidity by forming a slit in a predetermined region, making a cut, or reducing the basis weight in the predetermined region in the central absorbent portion.

  (8) A substantially strip-shaped adhesive portion formed on the outer surface side of the back sheet so as to extend in the longitudinal direction, and the adhesive portion from a position of the second liquid-proof groove in the width direction. The absorbent article according to any one of (5) to (7), which is also formed at an outer position.

  According to invention of (8), an absorbent article is further equipped with the substantially strip-shaped adhesion part formed so that it may extend in the longitudinal direction at the outer surface side of a back surface sheet, and an adhesion part is the 2nd in the width direction. It is formed at a position outside the position of the liquid-proof groove. As a result, the absorbent article is fixed to the underwear or the like by the adhesive portion, and is fixed outside the second liquid-proof groove in the width direction. For example, the support portion without releasing the force applied from the thigh , And the first liquid-proof groove and the second liquid-proof groove can be suitably bent to incline the support portion at a predetermined angle. In addition, the adhesive portion is disposed outside the position of the second liquid-proof groove in the width direction. This is not only the case where the entire adhesive portion is completely formed outside the second liquid-proof groove. It also includes a case where the second liquid-proof groove is overlapped with the second liquid-proof groove in a manner that does not substantially prevent the second liquid-proof groove from being bent.

  (9) The adhesive portion is formed between a front adhesive portion formed on a front side in the longitudinal direction, a rear adhesive portion formed on a rear side in the longitudinal direction, and the front adhesive portion and the rear adhesive portion. The absorbent article according to (8), further comprising a non-adhesive part formed on the surface.

  According to invention of (9), as for an absorbent article, the adhesion part has the front adhesion part formed in the front side in a longitudinal direction, the back adhesion part formed in the back side in a longitudinal direction, and the front adhesion part. A non-adhesive part formed between the rear adhesive part. Thereby, while preventing the shift | offset | difference of an absorbent article with the front side adhesion part of the front side in a longitudinal direction, and the back side adhesion part of the rear side in a longitudinal direction, by providing a non-adhesion part, in the area | region near a non-adhesion part The adhesion to the body and the followability can be improved.

  (10) The absorbent article according to (9), wherein the non-adhesive portion is formed substantially in the central region.

  According to the invention of (10), the non-adhesive part of the absorbent article is formed substantially in the central region. Since the non-adhesive part is formed in the central area, which is an area in contact with the excretion part in the central absorption part, the adhesion and followability to the excretion part can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which suppresses the leakage of excrement can be provided.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view of an absorbent article according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the absorbent article according to the first embodiment of the present invention. FIG. 3 is a perspective view of the absorbent article according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view for explaining the movement of the absorbent article in the first embodiment. FIG. 5 is a cross-sectional view for explaining the movement when the force F is applied inward in the width direction in FIG. FIG. 6 is a plan view of an absorbent article according to the second embodiment of the present invention. FIG. 7 is a plan view of an absorbent article according to the third embodiment. FIG. 8 is a plan view of an absorbent article in the prior art. FIG. 9 is a plan view of an absorbent article in the prior art.

[1] Overall structure of absorbent article The overall structure of the absorbent article of the present invention will be described with reference to the absorbent article 1 according to the first embodiment of the present invention.

[1.1] General As shown in FIGS. 1 and 2, the absorbent article 1 of the present invention has a substantially vertically long shape, a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, The absorber 4 arrange | positioned between the surface sheet 2 and the back surface sheet 3 is provided.

  The absorbent article 1 is an absorbent article that is long on the rear side in the longitudinal direction, and specifically, is an absorbent article that is long on the rear side so as to cover even the tailbone. The length of the absorbent article 1 in the longitudinal direction can be exemplified as 290 mm to 420 mm, preferably 330 to 400 mm. The absorbent article 1 having the illustrated length can be suitably used, for example, when sleeping at the time of sleeping (for example, for night use).

  The top sheet 2 is disposed on the body side and in contact with the excretory part during use. Excrements such as menstrual blood excreted from the excretion portion permeate the top sheet 2 and are absorbed by the absorber 4. Since the back sheet 3 arranged on the underwear side is liquid-impermeable, excrement does not permeate the underwear side and is held in a state of being absorbed by the absorber 4.

  The top sheet 2 and the absorbent body 4 are fixed so as to be bonded together by a hot melt adhesive or the like. Similarly, the back sheet 3 and the absorbent body 4 are fixed so as to be pasted with a hot melt adhesive or the like. Further, the top sheet 2 and the back sheet 3 are joined together by being bonded together by a hot melt adhesive and heat sealing.

[1.2] Central absorbent part and support part The absorbent article 1 includes a central absorbent part 40 formed at a substantially central position in the width direction, and support parts 7A formed on both side parts 41A and 41B of the central absorbent part 40. 7B. The support portions 7A and 7B are formed from the front region to the rear region in the side portions 41A and 41B.

  The center absorption part 40 is an area | region which mainly absorbs the excretion from an excretion part, and contact | abuts an excretion part in the predetermined part in this center absorption part 40. FIG. The central absorbent portion 40 is formed so as to be able to protrude in the thickness direction of the absorbent article 1 and, for example, is pushed up so as to protrude toward the body side during use and is in close contact with the excretory portion. Here, the center absorption part 40 can also form the low-rigidity part 45 mentioned later in order to improve the adhesiveness with respect to an excretion part, and the followable | trackability with respect to a motion of a body.

  For example, as will be described later, the central absorbent portion 40 can be formed by pressure-bonding a predetermined region in a state in which the topsheet 2 and the absorbent body 4 are laminated and arranged.

  The support portions 7A and 7B are formed along both side portions 41A and 41B in the central absorbent portion 40. The support portions 7A and 7B are formed from the front region to the rear region in the longitudinal direction of the side portions 41A and 41B in the central absorbent portion 40. Thereby, in the state which the center absorption part 40 protruded to the body side in the thickness direction, the both sides 41A and 41B of this center absorption part 40 can be supported entirely.

  For example, the support portions 7A and 7B have an absorption portion support index (= a / b) indicated by the ratio of the distance in the longitudinal direction of the support portions 7A and 7B to the distance in the longitudinal direction at the side portion of the central absorbent portion 40 is 0. .80 or more, preferably 0.85 or more, and more preferably 0.90 or more. For example, by configuring the absorbent part support index to be 0.80 or more, both side parts 41A and 41B in the central absorbent part 40 can be supported entirely by the support parts 7A and 7B. Thereby, in the state which the center absorption part 40 protruded in the thickness direction, both side part 41A, 41B of this center absorption part 40 can be supported from the downward direction (underwear side).

  Furthermore, the support portions 7A and 7B are formed to have a substantially equal width with respect to the center line L, and are formed in a substantially linear shape or a gentle curved shape extending substantially parallel to the longitudinal direction of the absorbent article 1. In particular, from the central region to the rear region, the opposing intervals of the support portions 7A and 7B remain uniform and continue substantially linearly without being curved. By forming the support portions 7A and 7B in such a shape, for example, the force F when the force F is applied to the inner side in the width direction by the thigh in the front region or the central region in the central absorbent portion 40, It is transmitted not only to the front area and the central area in the support portions 7A and 7B but also to the rear area. Thereby, since the center absorption part 40 pushes up not only a front area and a center area but the back area to the body side, it can suppress the leakage of excrement from the back side.

  As described above, the support portions 7A and 7B are formed from the front region to the rear region. For example, when the support portions 7A and 7B are attached to the underwear, the support portions 7A and 7B are assumed to be from the position assumed to be the center of the crotch in the underwear to the vicinity of the caudal bone. Can be formed.

  Further, for example, when the wing 100 is used as a reference, the front end 7P of the support portions 7A and 7B is a front side position by 50 mm to 60 mm with respect to the wing center 100P in the longitudinal direction of the wing 100. The rear end 7Q can be formed so as to be positioned at the rear side by 140 to 160 mm from the wing center 100P, which is the center position of the wing 100.

[1.3] Liquid-proof groove and support part In this embodiment, the absorbent article 1 includes the first liquid-proof groove 5 in which the crimping part 90 is continuously formed so as to surround the central absorbent part 40. And a second liquid-proof groove 6 formed outside the first liquid-proof groove 5. The support portions 7A and 7B are formed between the first liquid-proof groove 5 and the second liquid-proof groove 6.

  The first liquid-proof groove 5 is formed in a longitudinal direction so as to be continuous from both ends of the front U-shaped portion 51 formed in a substantially U shape projecting forward in the longitudinal direction and the front U-shaped portion 51. The inner side parts 50A and 50B extending, and the rear side U-shaped part 53 formed in a substantially U shape projecting to the rear side in the longitudinal direction while connecting the rear side end parts in the inner side parts 50A and 50B.

  The first liquid-proof groove 5 has a vertically long and substantially oval shape as a whole, and is formed so as to surround the central absorbent portion 40. The first liquid-proof groove 5 functions as a bending portion when the support portions 7A and 7B are inclined so as to form a predetermined angle with respect to the thickness direction and support the central absorbent portion 40 from below (underwear side). Thus, the series of operations can be performed smoothly. Specifically, the first liquid-proof groove 5 and the second liquid-proof groove 6 are bent, and the support portions 7A and 7B are inclined so as to enter the lower side (underwear side) of the central absorption portion 40, and the central absorption. The function of pushing up the unit 40 so as to be in close contact with the excretory part of the body is exhibited. In particular, when the support portions 7A and 7B are formed in a substantially linear shape or a gentle curved shape from the front region to the rear region of the both side portions 41A and 41B of the central absorption portion 40, the central absorption is performed in the front region and the central region. The lateral force F can be transmitted to the rear region as it is from the thigh received by the portion 40. Thereby, the clearance gap between the center absorption part 40 and a body can be made difficult, for example, the leakage of excrement from the back side can be suppressed.

  The second liquid-proof groove 6 includes outer-side parts 60A and 60B formed on the outer side of the inner-side parts 50A and 50B in the first liquid-proof groove 5 so as to extend in the longitudinal direction at substantially equal intervals. An outer U-shaped portion 63 formed in a substantially U-shape that connects rear end portions of 60A and 60B and projects rearward in the longitudinal direction.

  The second liquid-proof groove 6 is substantially U-shaped as a whole and is formed outside the first liquid-proof groove 5. The second liquid-proof groove 6 functions as a bent portion in the same manner as the first liquid-proof groove 5 and can smoothly perform the series of operations together with the first liquid-proof groove 5.

  The rear U-shaped portion 53 in the first liquid-proof groove 5 can be formed such that its protruding end 53P is at a position 160 to 180 mm from the wing center 100P, which is the center in the longitudinal direction of the wing 100, for example. In this case, when the posterior U-shaped portion 53 is formed so that the protruding end 53P is located at a distance of 160 mm or less from the wing center 100P, the posterior U-shaped portion 53 is disposed before the tailbone. In this case, the absorbent article 1 is stretched and the absorbent article 1 does not fit to the body, and a gap is formed between the absorbent article 1 and the body, so that leakage easily occurs from the rear side, for example. On the contrary, if this distance is 180 mm or more, since the rigid intuition by the rear U-shaped portion 53 in the first liquid-proof groove 5 is lost, the absorbent article 1 becomes sticky, for example, leakage from the rear side. It tends to occur.

  The front end of the second liquid-proof groove 6 can be positioned forward by 50 to 60 mm with respect to the wing center 100P that is the center in the longitudinal direction of the wing 100, for example.

  Here, the support portions 7A and 7B can be formed between the inner side portions 50A and 50B and the outer side portions 60A and 60B. By forming the support portions 7A and 7B between the inner side portions 50A and 50B and the outer side portions 60A and 60B, the support portions 7A and 7B are arranged along both side portions 41A and 41B of the central absorbent portion 40. Can be formed. Furthermore, the 1st liquid-proof groove | channel 5 and the 2nd liquid-proof groove | channel 6 which function as a bending part can be arrange | positioned along the both sides of support part 7A, 7B by forming in this way. Thereby, as above-mentioned, a series of operation | movement which supports the center absorption part 40 in support part 7A, 7B can be performed smoothly.

  Moreover, support part 7A, 7B can be comprised, without adding a big change to the normal manufacturing process in the absorbent article 1. FIG.

  Moreover, support part 7A, 7B can obtain predetermined | prescribed rigidity by arrange | positioning the absorber 4 with high density with respect to the center absorption part 40. FIG. Thereby, support part 7A, 7B can be equipped with the rigidity which is not deform | transformed by the force F applied to the width direction inner side by a thigh, for example.

In the present embodiment, can be exemplified a case density in the central absorbent portion 40 is 0.150 g / cm ³ 0.050, the supporting portion 7A to this, 0.500 g / ^cm 3 density from 0.100 in 7B, The case where it is preferably 0.125 to 0.200 g / cm ³ can be exemplified. Here, in this embodiment, the density of the absorber 4 in the support portions 7 </ b> A and 7 </ b> B is set to be higher than the density of the absorber 4 in the central absorbent portion 40.

Further, for example, the basis weight at the above density is 400 to 1200 g / m ² , preferably 500 to 1000 g / m ² , and the basis weight at the support portions 7A and 7B is 300 to 800 g / m 2. ² , preferably 350 to 600 g / m ² .

Here, when the conditions of the density and basis weight in the central absorbent portion 40 are satisfied, the flexibility when contacting the excretory portion is high, and a sufficient amount of liquid absorbability can be ensured.
Further, when the support portions 7A and 7B satisfy the above conditions of density and basis weight, the central absorbent portion 40 can be suitably pushed up and supported without being greatly deformed by the force F.

[1.4] Adhesive part The substantially strip-shaped adhesive part 8 is formed in the outer surface (surface which faces an underwear side) in the back surface sheet 3 so that it may extend in a longitudinal direction. By fixing the absorbent article 1 to the underwear or the like by the adhesive portion 8, it is possible to prevent the absorbent article 1 from being displaced, and thus it is possible to suitably suppress excrement leakage.

  Further, the adhesive portion 8 is formed on the outer side in the width direction of the second liquid-proof groove 6. By forming the adhesive portion 8 outside the second liquid-proof groove 6 functioning as a bent portion in the width direction, the support portions 7A and 7B are inclined so as to form a predetermined angle with respect to the thickness direction. A series of operations of supporting from the lower side of the central absorbent portion 40 can be performed smoothly.

  Here, the adhesion part 8 can be formed in the substantially whole area of the longitudinal direction in the absorbent article 1, or can also be formed in part. For example, as will be described later, by forming a region in which the predetermined adhesive body constituting the adhesive portion 8 is not disposed in the central region, the followability of the predetermined region to the body in the central absorbent portion 40 can be improved.

[1.5] Usage Mode An example of usage mode in the absorbent article of the present invention will be described with reference to FIGS. 3 to 5 using the absorbent article of the present invention in the first embodiment.

  With reference to FIG. 3, as a usage example of the absorbent article 1 in the present embodiment, a usage mode in a sleeping posture at bedtime will be described. As shown in FIG. 3, in the use state in the sleeping position, the rear side 860 of the absorbent article 1 is disposed substantially parallel to the floor surface, and the front side 840 is predetermined with respect to the rear side 860 of the absorbent article 1. It arrange | positions so that it may make an angle, in other words, may make a predetermined angle with respect to a floor surface.

  In a sleeping posture at bedtime or the like, the excretory part is oriented in a direction substantially perpendicular to the floor surface, and therefore excrement easily flows to the floor surface side. Excretion from the excretion part is absorbed in a substantially forward area of the central absorption part 40 on the front side 840 arranged substantially perpendicular to the floor surface, but excreted because it remains in the state shown in FIG. 3 for a long time. Things may flow to the back side 860 along the body. Here, about the absorbent article 1 in this invention, it is not only the center absorption part 40 in the front side 840 but the center absorption in the back side 860 by making it closely_contact | adhere so that the center absorption part 40 may be pushed up to the body side. The portion 40 is also pushed up and brought into close contact with the body, so that excrement leakage is suitably suppressed. Below, the operation | movement by which the center absorption part 40 is pushed up to the body side is demonstrated with FIG.

  As shown in FIG. 4, in a state where the absorbent article 1 is attached to underwear or the like, the central absorbent portion 40 has a generally horizontal shape as a whole. And, in a state where the absorbent article 1 is mounted so that the central absorbent portion 40 comes into contact with the excretory portion, by receiving a predetermined force F by the thigh or the like on the inner side in the width direction, as shown in FIG. The absorbent article 1 generally shrinks in the width direction, and the support portions 7A and 7B are inclined so as to form a predetermined angle with respect to the thickness direction, and the central absorbent portion 40 is located below the central absorbent portion 40 (underwear side). Is supported by pushing it up toward the body (in the direction of arrow S). Here, since the central absorption part 40 can be brought into close contact with the excretion part, the excretion can be suitably absorbed in the vicinity of the excretion part. For example, when the force F is concentrated on the central absorption part 40 The center absorbent portion 40 is deformed into a convex shape on the underwear side starting from the center in the width direction, creating a gap between the absorbent article 1 and the body, and leakage from the rear side may occur.

  The support portions 7A and 7B in the absorbent article 1 of the present embodiment are substantially linear or gently curved in a direction substantially parallel to the longitudinal direction from the front region to the rear region in the side portions 41A and 41B of the central absorbent portion 40. Since the force F applied in the front area and the central area of the support portions 7A and 7B is transmitted to the rear area without escaping in the middle, the rear area of the central absorption section 40 on the rear side 860 is also on the body side. Can be pushed up. Thereby, the leakage of excrement can be suppressed. In particular, leakage of excrement from the rear side can be suppressed.

[2] Second Embodiment As shown in FIG. 6, in the absorbent article 1 </ b> A in the second embodiment, a predetermined low-rigidity portion 45 is formed in the central absorbent section 40 in the absorbent article 1 in the first embodiment. Absorbent article 1.

  The low-rigidity portion 45 formed in the central absorbent portion 40 is a region where the rigidity is lowered with respect to the region adjacent to the low-rigidity portion 45, and is formed by forming a slit or a predetermined cut, for example. Is done. Further, for example, the absorber 4 can be formed by reducing the basis weight.

Absorber 4 low rigidity portion 45 formed by the low basis weight of the can, for example, with respect to 450 g / ^{m 2} from the basis weight is 350 in the surrounding adjacent areas are formed by the low basis weight into 250 g / ^{m 2} 150 be able to. When the basis weight is lowered as described above, the rigidity of the predetermined region of the central absorbent portion 40 can be lowered and sufficient absorbability can be ensured.

  The low-rigidity portion 45 can be formed to have a width of 5 mm to 10 mm (10 mm to 20 mm as a whole) on both sides from the center line L, for example. This region is the region that is most difficult to fit on the body (perineal region), and is a region where followability is required. Further, in the longitudinal direction, for example, the rigidity can be reduced from the central region to the rear region in the central absorbent portion 40.

  Thus, the center absorption part 40 which formed the low-rigidity part 45 is easy to deform | transform when receiving force F etc., for example, the fitting property of a caudal bone vicinity further improves from a perineum part. Therefore, it is possible to suppress back leakage and oblique back leakage that frequently occur in the sleeping posture on the back.

[3] Third Embodiment As shown in FIG. 7, the absorbent article 1 in the present embodiment has the adhesive portion 8 in the absorbent article 1 in the first embodiment, and the adhesive body is arranged at the center in the longitudinal direction. This is an absorbent article 1B in which a non-adhesive portion 83 that is not formed is formed.

  The adhesive portion 8 is formed to fix the absorbent article 1 to an undergarment or the like so that the central absorbent portion 40 is pushed up to the body side and is kept in close contact with the absorbent article 1 without creating a gap. In this embodiment, the adhesion part 8 is formed in the outer side (underwear side) in the back surface sheet 3, and the outer side of the position corresponded to the formation position of the 2nd liquid-proof groove 6. FIG.

  The adhesive part 8 in this embodiment includes a front adhesive part 81 formed on the front side in the longitudinal direction of the absorbent article 1, a rear adhesive part 85 formed on the rear side in the longitudinal direction, a front adhesive part 81, and the rear. And a non-adhesive portion 83 formed between the side adhesive portion 85 and the non-adhesive portion 83.

  By providing the non-adhesive portion 83 in the substantially central region of the central absorbent portion 40, it is possible to assist deformation or the like to the body without restricting movement of underwear or the like. Specifically, since the absorbent article 1 is not fixed to the underwear or the like in the non-adhesive portion 83, the adhesion to the body side, for example, the followability due to movement such as turning over is improved. Thereby, for example, it is possible to suppress the leakage from the back that frequently occurs in the sleeping posture on the back and the leakage from the oblique back.

  Moreover, the non-adhesion part 83 can be formed in the position of the longitudinal direction corresponding to an anal part from the perineum part in a use aspect.

[4] Each component Each component is described in detail below.
The top sheet 2 is formed of a resin film having a large number of liquid-permeable holes, a net-like sheet having a large number of meshes, a liquid-permeable nonwoven fabric, or a woven fabric. As the resin film and the net-like sheet, those formed of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) or the like can be used. Moreover, as a nonwoven fabric, the spunlace nonwoven fabric formed from cellulose fibers, such as rayon, a synthetic resin fiber, etc., the air through nonwoven fabric formed from the said synthetic resin fiber, etc. can be used. Moreover, as a raw material, natural products capable of biodegradability such as polylactic acid, chitosan, polyalginic acid and the like can be used. In addition, a large number of liquid-permeable holes may be formed, and a silicone-based or fluorine-based water-repellent oil agent may be applied to make it difficult for body fluids to adhere to the outer surface.

Also, the basis weight is preferably from ^{15~100g / m 2, 20~50g / m} 2 is more preferable. It has a bulk of 0.4 to 2.0 mm, and further contains 1.0% or more of titanium oxide in the core of the core-sheath structure of the nonwoven fabric fiber, so that there is little sag in use, It can form so that the distance with the absorber 4 can be earned. Furthermore, the surface sheet 2 itself can also improve the concealability. Further, by adding up to 30% water-repellent fibers, there is an effect of suppressing the diffusibility of the topsheet 2, and by blending the water-repellent fibers, there is also an effect of suppressing the liquid sucking from the absorbent body 4. is there. If the basis weight is 15 g / m ² or less, sufficient surface strength cannot be obtained, and there is a risk of breaking during use. Moreover, in the case of 100 g / m < ² > or more, excessive wrinkle will develop and a discomfort will be produced during use. Further, the density is not particularly limited as long as it is 0.12 g / cm ³ or less and liquid permeable. When the density is higher than this, it is difficult to smoothly pass between the fibers of the top sheet 2. In the case of menstrual blood, one having higher viscosity and lower density than urine is preferable.

  Further, when the topsheet 2 is a perforated film such as a film in which a large number of liquid-permeable holes are formed as described above, the perforation diameter is in the range of 0.05 mm to 3 mm, and the pitch is 0.2 mm to 10 mm. Within the following ranges, the aperture area ratio is preferably in the range of 3% to 30%. As the manufacturing method, the surface sheet 2 obtained by the so-called PFW method in which a film is passed through a pattern drum whose opening condition has been changed in advance and suctioned by suction, or the PFW method having a uniform opening condition. For example, there may be mentioned a method of further adding an opening to the region straddling the crease line by pin embossing. The arrangement of the apertures is not particularly limited, such as a staggered pattern, a lattice pattern, or a wavy pattern. Examples of the shape of the opening include a round shape, an elliptical shape, and a square shape. Moreover, the valve may be provided in the periphery of the opening part. As the surface sheet 2, a porous or non-porous nonwoven fabric or a porous plastic sheet can be preferably used.

As a suitable example of the surface sheet 2, for example, a two-layered fusion sheet in which heat fusion fibers are bonded by means such as air-through can be used. The sheet is composed of hydrophilic fibers and water-repellent fibers whose constituent fibers are 4 denier or less. Specifically, the surface fiber layer is composed of a polyethylene / polyester bicomponent composite fiber, and the back surface fiber layer is composed of polyethylene / polyester or polyethylene / polypropylene bicomponent composite fiber. The basis weight of the sheet is 10 to 40 g / m ² . If this basis weight exceeds 40 g / m ² , the liquid is held by the top sheet 2 and is maintained in a solid state, which makes it uncomfortable.

  The back sheet 3 is made of a material that can prevent excrement absorbed by the absorber 4 from leaking outside. In addition, by using a moisture-permeable material, it is possible to reduce stuffiness at the time of wearing, and to reduce discomfort at the time of wearing. Such materials include, for example, a liquid-impermeable film mainly composed of polyethylene (PE), polypropylene (PP), etc., a breathable film, a composite in which a liquid-impermeable film is laminated on one side of a nonwoven fabric such as spunbond. A sheet etc. are mentioned. Preferably, a hydrophobic nonwoven fabric, a water-impermeable plastic film, a laminate sheet of a nonwoven fabric and a water-impermeable plastic film, or the like can be used. Further, an SMS nonwoven fabric sandwiched between a melt-blown nonwoven fabric with high water resistance or a strong spunbond nonwoven fabric may be used.

  Further, a second sheet (not shown) made of a liquid permeable sheet can be further disposed between the top sheet 2 and the absorber 4. The material used for the second sheet is formed of a resin film in which a large number of liquid-permeable holes are formed, a net-like sheet having a large number of meshes, a liquid-permeable non-woven fabric, or a woven fabric, as with the top sheet 2. The As the resin film and the net-like sheet, those formed of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) or the like can be used. Moreover, as a nonwoven fabric, the spunlace nonwoven fabric formed from cellulose fibers, such as rayon, a synthetic resin fiber, etc., the air through nonwoven fabric formed from the said synthetic resin fiber, etc. can be used. In addition, this second sheet plays a role as a support for the absorbent body 4 and can impart flexibility and form stability to the absorbent body 4.

  The second sheet is bonded to the top sheet 2 with a predetermined hot melt adhesive. For example, the hot melt adhesive is applied at the center of the second sheet in the width direction so as to form a plurality of thin lines extending in the longitudinal direction.

The absorber 4 is comprised by the cushion arrange | positioned at the surface sheet 2 side, and absorber material. The absorbent material has a function of absorbing and holding a liquid such as menstrual blood, and is preferably bulky, hardly deformed, and has little chemical irritation. For example, an absorption pair material composed of a fluffy pulp or airlaid nonwoven fabric and a superabsorbent polymer can be exemplified. Examples of the fluffy pulp include artificial cellulose fibers such as chemical pulp, cellulose fiber, rayon, and acetate. As an air laid nonwoven fabric, the nonwoven fabric which heat-bonded the pulp and the synthetic fiber, or was fixed with the binder can be illustrated, for example. Examples of the superabsorbent polymer include starch-based, acrylic acid-based, and amino acid-based particulate or fibrous polymers. Moreover, as a nonwoven fabric, nonwoven fabrics, such as a spun lace, a spun bond, a thermal bond, a melt blown, a needle punch, an air through, are used, for example. Examples of the raw material fibers constituting the nonwoven fabric include synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton. As the cushion, for example, liquid permeable paper or cellulose sheet is used. As an example of the absorbent body 4 in which the cushion and the absorbent material are combined, the pulp has a basis weight of 200 g / m ² , the polymer has a basis weight of 4 g / m ² (the polymer is dispersed throughout), and the pulp and the polymer are totally dispersed. An example is a mixture in which a uniformly distributed mixture is wrapped with a tissue having a basis weight of 15 g / m ² .

  Although the shape and structure of the absorber 4 can be changed as necessary, the total absorption amount of the absorber 4 needs to correspond to the design insertion amount as the absorbent article and the desired application. Further, the size, absorption capacity, etc. of the absorber 4 are changed corresponding to the wearer from infants to adults.

  As described above, the central absorption portion 40 is a region that abuts the excretion portion and mainly absorbs excrement. For example, in the embodiment of the present invention, the region is surrounded by the first liquid-proof groove 5. As described above, the central absorbent portion 40 is formed so as to be able to protrude in the thickness direction. In the protruded state, the central absorbent portion 40 is brought into close contact with the excretory portion.

  The first liquid-proof groove 5 and the second liquid-proof groove 6 are formed by a pressure-bonding portion 9 that is continuously formed by a predetermined pressure-bonding process. The pressure bonding part 9 is formed by a predetermined pressure bonding process using a heating roller. For example, a roll having a flat surface is applied to the back surface sheet 3 side of the absorbent body 4, and a heating roll having a convex portion of a predetermined pattern is applied to the front surface side of the top sheet 2 to be pressurized and heated. As a result, in the crimping part 9, the absorber 4 and the surface sheet 2 are positioned between the high-density crimping part in which the absorber 4 and the surface sheet 2 are almost crimped, and the high-density crimping part and the high-density crimping part. Although not formed, a medium-density crimping portion having a higher density than the region other than the crimping portion 9 is formed. In all the parts of the pattern of the crimping part 9, the high-density crimping part and the medium-density crimping part are alternately formed, and the linear first concaves from the surface (body side) of the absorbent article 1 to the back sheet 3 side. One liquid-proof groove 5 and a second liquid-proof groove 6 are formed.

  The width dimensions A1 and B1 in the first liquidproof groove 5 and the second liquidproof groove 6 are, for example, 0.5 mm to 10 mm, preferably 1 mm to 5 mm in the absorbent article 1 of the first embodiment. Is desirable. When the width dimensions A1 and B1 are 0.5 mm or less, only the top sheet 2 and the absorbent body 4 are cut, and the push-up function of the central absorbent portion 40 is lost. When the width dimensions A1 and B1 are 10 mm or more, the fit, the feeling of use, the absorbability and the like are lowered.

  The distance C1 between the arrangement of the first liquid-proof groove 5 and the second liquid-proof groove 6 is 1 mm to 10 mm, preferably 5 mm to 8 mm. When the distance C1 between the arrangements is 1 mm or less, the fit property, the feeling of use and the like are lowered. When the distance C1 between the arrangements is 10 mm or more, the push-up function of the central absorbent portion 40 is lost, the fit property is lowered, and the central absorbent portion 40 is likely to be twisted.

  The distance D1 between the side portions 41A and 41B in the first liquid-proof groove 5 is 20 mm to 60 mm, preferably 30 mm to 40 mm. When the distance D1 is 20 mm or less, the central absorption part 40 cannot continue to contact the excretion part (vaginal opening part), and a gap between the body and the absorbent article 1 is generated and easily leaks. When the distance D1 is 60 mm or more, the absorbent article 1 is not deformed in a convex shape on the body side (vaginal mouth side) even when receiving the force F on the inner side in the width direction from the thigh. The central portion is deformed into a concave shape, and a gap between the body and the absorbent article 1 is generated and easily leaks.

  In addition to adhesives such as acrylic adhesives and rubber adhesives, the adhesive body in the adhesive part 8 is made of a cellulose, polyvinyl alcohol, gelatin, polyglutamic acid, polylysine or the like that adheres to the skin and exhibits adhesive strength. An amino acid gel can also be used.

It is a top view of the absorptive article in a 1st embodiment of the present invention. It is sectional drawing of the absorbent article in 1st Embodiment of this invention. It is a perspective view of the absorptive article in a 1st embodiment of the present invention. It is sectional drawing for demonstrating the motion of the absorbent article in 1st Embodiment. In FIG. 4, it is sectional drawing explaining a movement when force F is applied to the width direction inner side. It is a top view of the absorptive article in a 2nd embodiment of the present invention. It is a top view of the absorptive article in a 3rd embodiment. It is a top view of the absorbent article in a prior art. It is a top view of the absorbent article in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Top sheet 3 Back sheet 4 Absorber 5 1st liquid-proof groove 6 2nd liquid-proof groove 7 Support part 8 Adhesion part 40 Central absorption part

Claims (10)

A substantially vertically long absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet,
A central absorbent portion formed at substantially the center in the width direction of the absorbent article;
A support part formed on both sides of the central absorbent part and formed from a front region to a rear region on both side parts, and
The said support part is an absorptive article formed in the shape of a substantially straight line or a gentle curve extending substantially parallel to the longitudinal direction in the absorptive article. The central absorbent portion is formed so as to protrude in the thickness direction,
The said support part inclines so that a predetermined angle may be made with respect to the thickness direction in the state which the said center absorption part protruded, and supports from the front area of the longitudinal direction in this center absorption part to a back area. Absorbent article as described in 1.   The support portion is substantially linear in the front region, and is a gently curved shape that swells outward in the width direction in a central region between the front region and the rear region, and substantially straight in the rear region. The absorbent article according to claim 1 or 2, wherein   The absorption part support index indicated by the ratio of the distance in the longitudinal direction of the support part to the distance in the longitudinal direction at the side part of the central absorption part is 0.80 or more. The absorbent article in any one. A first liquid-proof groove in which a predetermined pressure-bonding portion is continuously formed so as to surround the central absorption portion, and a first liquid-proof groove formed continuously on the outer side of the first liquid-proof groove. Two liquid-proof grooves,
The first liquid-proof groove is formed in a longitudinal direction so as to be continuous from both ends of the front U-shaped portion formed in a substantially U shape projecting forward in the longitudinal direction and the front U-shaped portion. An extending inner side part, and a rear U-shaped part formed in a substantially U-shape that connects the rear side end part in the inner side part and projects rearward in the longitudinal direction,
The second liquid-proof groove connects an outer side portion formed so as to extend in the longitudinal direction at substantially equal intervals to the inner side portion, and a rear side end portion of the outer side portion, and is a rear side in the longitudinal direction. An outer U-shaped portion formed in a substantially U-shape projecting to
The absorbent article according to any one of claims 1 to 4, wherein the support portion is formed between the inner side portion and the outer side portion.   The absorbent article according to claim 5, wherein the support part is configured such that the absorbent body is arranged at a high density with respect to the central absorbent part.   The absorptive article according to any one of claims 1 to 6 in which said central absorption part is provided with a low rigidity part made low rigidity. A substantially strip-shaped adhesive part formed on the outer surface side of the back sheet so as to extend in the longitudinal direction;
The absorbent article according to any one of claims 5 to 7, wherein the adhesive portion is formed at a position outside the position of the second liquid-proof groove in the width direction.   The adhesive part is formed between a front adhesive part formed on the front side in the longitudinal direction, a rear adhesive part formed on the rear side in the longitudinal direction, and the front adhesive part and the rear adhesive part. The absorbent article according to claim 8, further comprising a non-adhesive portion.   The absorbent article according to claim 9, wherein the non-adhesive portion is formed substantially in the central region.

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