KR101148443B1 - Absorbent article - Google Patents

Abstract

An absorbent article 1 having a pair of side sheets 6 at both sides of the absorbent body, each sidesheet 6 being connected to the absorbent body at a substantially continuous joint line 8 in the longitudinal direction of the absorbent body. It is joined. The bonding line 8 has a plurality of portions 81 close to the longitudinal center line CL of the absorbent body alternately with a portion 82 far from the center line CL, and in the longitudinal direction of each sidesheet 6. Pockets 84 are formed between the adjacent portions 81, 81 adjacent to each other.

Sanitary napkins, panty liners, incontinence pads, absorbent articles

Description

[0001] ABSORBENT ARTICLE [0002]

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the state which looked at the sanitary napkin as one Embodiment of this invention from the surface sheet side.

FIG. 2 is a cross-sectional view taken along the line II of FIG. 1. FIG.

3 is a partially enlarged plan view showing the details of a bonding line of the sanitary napkin shown in FIG. 1.

4 is a diagram illustrating another example of the bonding line.

Fig. 5 is a partial perspective view showing a state in which the pocket is opened in a worn state.

6 is a diagram illustrating still another example of a junction line.

7 is a diagram illustrating still another example of the bonding line.

It is a top view which shows the state which looked at the sanitary napkin as another embodiment of this invention from the surface sheet side.

FIG. 9 is an enlarged cross-sectional view taken along the line II-II of FIG. 8.

It is a partially enlarged plan view which shows the detail of the junction line of the excretion opposing part and front part in the sanitary napkin shown in FIG.

It is a perspective view which shows the state which opened the pocket in the wearing state of the sanitary napkin shown in FIG.

The present invention relates to absorbent articles such as sanitary napkins, panty liners (mucus sheets), and incontinence pads.

BACKGROUND ART In absorbent articles such as sanitary napkins, a technique is known in which pockets are formed by using side sheets (such as a water-repellent nonwoven fabric) on both side portions on the skin contact surface side.

For example, Japanese Patent Application Laid-Open No. 5-51328 (hereinafter referred to as Document 1) has a portion of the inner edge portion side of the liquid barrier sheet forming the wing portion on the surface sheet, and the barrier sheet is placed on the surface sheet. A sanitary napkin is proposed, which is bonded to the surface sheet at a position separated from the inner edge thereof and has a pocket formed between the barrier sheet and the surface sheet.

Further, Japanese Laid-Open Patent Publication No. 2001-327535 (hereinafter referred to as Document 2) is an absorbent article in which the width of the middle portion of the absorbent body is formed to be narrower than the width of the front and rear portions, and the inner edge of the side nonwoven fabric disposed on both sides thereof ( An inner edge shape is formed according to the side edge shape of the absorbent body, and a body fluid filling pocket is formed between the side nonwoven fabric and the absorbent core without adhering the inner edge side of the side nonwoven fabric to the surface sheet. Is proposed.

However, the sanitary napkin described in Document 1 is provided with a pocket only in the vicinity of the wing, and the pocket is opened by pulling the wing to the outer surface side of the back sheet. Therefore, it is impossible to form such a pocket which does not have a blade | wing part or the vicinity of the wing | blade part of a napkin. In addition, the pocket described in Document 1 is likely to be pressed during wearing, resulting in crushing of the whole, or partial flipping.
The pocket of the absorbent article described in Document 2 is also likely to be crushed or partially turned over when a part thereof is pressed.

Furthermore, in the conventional sanitary napkin provided with a side sheet, the side sheet is often fixed by a straight heat sealing portion along the longitudinal direction of the napkin, so that the side sheet can be smoothly bent along the wearer's body. It may be hard or the heat sealing part may be hard, and the skin feel may be bad.

Accordingly, one object of the present invention is to provide an absorbent article which can fit well to the wearer's body shape and at the same time obtain leakage resistance when worn.

It is another object of the present invention to provide an absorbent article that satisfactorily curves to fit the wearer's body shape while keeping the leakage preventing effect of the pocket stable.

The present invention is an absorbent article having a substantially longitudinally absorbent body having a liquid-retaining absorbent layer and a liquid impermeable leakage preventing layer, and a pair of sidesheets disposed on each side of the absorbent body on the skin contacting surface side thereof. And each side sheet is bonded to the absorbent body in a substantially continuous bond line in the longitudinal direction of the absorbent body, and the bond lines are each of a plurality of alternating portions close to the longitudinal center line of the absorbent body and away from the center line. The above object is achieved by providing an absorbent article having pockets formed between portions close to the longitudinal centerline adjacent to each other in the respective sidesheets.

The present invention also relates to an absorbent article having an absorbent body having an absorbent layer and a leakage preventing layer, and a pair of sidesheets disposed on each of both side portions on the skin contacting surface side of the absorbent body, wherein the pair of sidesheets are each the absorbent body. Is joined to the absorbent body at a first bond line concave toward the widthwise center side of the first bond line and a second bond line extending around the longitudinal direction of the absorbent body of the first bond line and extending to cross the longitudinal direction of the absorbent body. A pocket for opening at the time of wearing is formed between the first joint line and the inner edge portion of each of the pair of side sheets, and the second joint line has a portion near the inner edge portion and the inner edge portion. Alternate parts far away from each other, It is to provide an absorbent article in which the distance between the near portions is shorter than the length in the longitudinal direction of the first seam.

Embodiment of the Invention

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated, referring drawings based on the preferable embodiment.

The sanitary napkin 1 as one embodiment of the absorbent article of the present invention has a liquid retaining absorbent layer 11 and a liquid impermeable leakproof layer 13, as shown in Figs. It has the elongate absorbent main body 10 and the pair of side sheets 6 and 6 arrange | positioned at each both side part in the skin contact surface side of the said absorbent main body 10. As shown in FIG. The pair of side sheets 6 and 6 includes a joint line (joint seal) each having a plurality of alternating portions 81 close to the longitudinal center line CL of the main body and portions 82 far from the center line CL; 8) is formed, and a plurality of pockets 84 are formed in the longitudinal direction between the portions 81 and 81 close to the center line CL.

As shown in Fig. 2, the absorbent layer 11 is composed of a liquid permeable surface sheet 2 and a liquid-retaining absorbent member 4, and the leakage preventing layer 13 is composed of a liquid impermeable back sheet 3. The surface sheet 2 covers the whole area | region of the upper surface of the absorber 4, and has a linear both side edge at the position which extends slightly from each edge of the absorber 4, respectively. The back sheet 3 covers the entire area of the lower surface of the absorbent body 4 and has a portion extending outwardly from each of both side edges of the absorbent body 4, and the extended portion is provided with the sidesheet 6 and the napkin 1. Side flaps 7 are formed at both sides of the side face. For convenience, the napkin 1 is divided into the excretion part opposing part A, the front part C, and the rear part B, as shown in FIG. The side flap portion 7 extends outward in the width direction at the excretion portion opposing portion A to form the wing portion 70. The absorber 4 is formed in a substantially rectangular shape, and is fixed in a state sandwiched between the front sheet 2 and the back sheet 3.

As shown in FIG. 1 and FIG. 2, the sidesheet 6 is formed on both sides of the absorbent body 10 on the skin contact surface side (upper side in FIG. 2), respectively, along the longitudinal direction of the absorbent body 10. It is arrange | positioned, and is arrange | positioned so that it may cover about the full length of the napkin 1, respectively.

As shown in Fig. 2, each side sheet 6 has a portion 6A positioned at the center in the width direction of the napkin 1 in two layers by bending the sheet, and the bending portion is inside the side sheet 6. It is an edge 61. The inner edge portion 61 is formed in a straight shape on the widthwise center portion side of the napkin 1. 2, 3, 7, and 8 show only the left side of the napkin, but the right side is configured in the same manner.

The side sheet 6 is preferable because the pocket is easily opened at the time of mounting if the bent portion is folded in two layers such that the bent portion is located at the center side in the width direction of the napkin (absorbent article).

The said part 6A in the side sheet 6 is being fixed to the back sheet 3 with the surface sheet 2 by the heat embossing process in the front-back part of the napkin 1. On the other hand, the part 6B located in the width direction outer side of the napkin 1 in the side sheet 6 is joined to the back sheet 3 by the adhesive agent which is not shown, and in the said part 6B, The part located in the periphery edge part 14 of the napkin 1 is joined by the back sheet 3 by heat embossing process. Moreover, the surface sheet 2 and the back sheet 3 are joined by the heat embossing process in the part located in the periphery edge part 14 of the napkin 1.

As shown in FIG. 1 and FIG. 3, each side sheet 6 is joined to the absorbent body 10 by a joining line 8 continuous in the longitudinal direction of the absorbent body 10. The longitudinal direction of the absorbent body is the same direction as the front and rear direction of the wearer at the time of attachment in napkins, panty liners, incontinence pads and the like.

As shown in FIG. 2, the joining line 8 in this embodiment joins a part of part 6A located in the width direction center side of the napkin 1 with the surface sheet 2 by heat embossing, Formed.

The bonding line 8 is formed by bonding the side sheet 6 to the surface sheet 2 only as in the present embodiment, or the side sheet 6 is fixed to the absorber together with the surface sheet 2, When a groove is not formed in the said joining line substantial part, it is preferable at the point that an absorbent article becomes softer and the fitting property with respect to a body improves.

The bonding line 8 may be formed by integrally pressing the side sheet together with the surface sheet and the absorber. In this case, there is an advantage that the penetration and diffusion of the liquid are suppressed by the grooves formed in the joint line portion.

Bonding line 8 is the excretion part opposing part A, when the napkin 1 (absorbent article) is divided into the excretion part opposing part A and the front part C and the rear part B which are located before and after it. In addition, it is formed so as to span between the front part C and the rear part B. FIG. Like the napkin 1, the excretion part opposing part A in the absorbent article provided with the wing part 71 which is fixed to outer surfaces of clothing, such as underwear, is a part which has a wing part in both sides.

The joining line 8 may be formed so as to extend from the excretion part opposing part A to either one of the front part C and the rear part B, and may be formed only in the excretion part opposing part A. As shown in FIG.

As for the shape of the bonding line 8, many pocket 84 is formed in the longitudinal direction, one pocket is small and it is hard to overturn a side sheet | seat. For this reason, there is no feeling of incongruity during wearing or a gap with the body in the inverted vicinity, and it is difficult to cause leakage. Moreover, although the pocket 84 of the part in close contact with a body is crushed (the liquid is absorbed by the absorber 4 in such a state because it is in close contact with a body in such a state) that the some pocket 84 is formed, the close state Does not affect the formation of the pocket 84 in the lower portion.

Furthermore, it is preferable that the joint line 8 is at least partially overlapped with the absorber 4 in plan view, because the liquid collected in the pocket is smoothly absorbed by the absorber, and leakage resistance is further improved. The liquid collected in the pocket is absorbed by the absorber 4 between moving from the front of the pocket to the inside, or after reaching the inside of the pocket, the liquid is returned to the absorber side and absorbed.

The overlapping of the absorber 4 in plan view means that all or part of the joint line 8 exists in the region where the absorber is disposed (in the region enclosed by the dotted lines that outline the absorber in FIG. 1). The seam line 8 is at least a portion present in the range from the portion 81 close to the longitudinal center line CL of the absorbent body in the width direction of the napkin 1 to the portion 82 far from the center line CL. It is preferable that a part overlaps with the absorber 4, and it is more preferable that the whole part existing in the range from the close part 81 to the distant part 82 overlaps with the absorber 4 more preferably. In the longitudinal direction of the absorbent body 10, the portion where the bond line 8 overlaps with the absorber 4 is preferably present in a part of the excretion opposing portion A, and is present over the entire length of the excretion opposing portion A. It is more preferable that there is. It is preferable to have the part which overlaps with the absorber 4 over about the full length of the junction line 8 especially except the part located in the front-back end of a napkin.

The seam 8 preferably spans at least 60% of the length of the napkin 1 (absorbent article), in particular at least 80% of the length of the napkin 1 (absorbent article).

In the present specification, the term "substantially continuous" is continuous so that, in addition to the continuous joint line as in the present embodiment, a plurality of joints are not overlapped with the straight line when an arbitrary straight line parallel to the width direction of the absorbent article is assumed. Although it consists of a plurality of discontinuous joints when viewed microscopically, it is intended to include such things as forming a linear joint when viewed as a whole, for example, a short joint 85 as shown in FIG. ) Is also a substantially continuous joining line formed by overlapping a part of each other so that a plurality of joining lines are arranged in the longitudinal direction of the napkin. However, it is preferable that the shortest distance between the junction parts 85 is 2 mm or less.

3, the shape of the bonding line 8 in the napkin 1 of this embodiment is shown. As shown in FIG. 3, the junction line 8 has a continuous waveform in plan view and is far from the portion 81 and the center line CL close to the longitudinal center line CL of the absorbent body 10. Each of the parts 82 is alternately provided. In other words, the portion 81 and the portion 82 far from the longitudinal center line CL are alternately present in the longitudinal direction of the napkin 1. "Near" and "far" as used herein are relative meanings of being close to the far and far from the close.

The joining line 8 is a shape where the arc-shaped part which convex toward the width direction center side of the napkin and the arc-shaped part which concave toward the width direction center side of the napkin alternated, and does not have the part parallel to the longitudinal direction of a napkin.

The portion 83 between the inner edge portion 61 and the joining line 8 in each side sheet 6 is not bonded to the surface sheet 2, and the portion 83 and the surface sheet 2 are separated from each other. The pocket 84 is formed in between. Each pocket 84 is formed between the adjacent portions 81 and 81 adjacent to each other in each sidesheet 6 in the longitudinal direction of the napkin 1 (absorbent body 10). The number of the pockets 84 is preferably 1 to 5, especially 2 to 4, per 2 cm in the length of the napkin (absorbent article) in the longitudinal direction.

In addition, the bonding line 8 has a separation distance W (see FIG. 3) between the portion 81 close to the longitudinal center line CL and the portion 82 far from the center line CL, 4 to 20 mm, in particular 5 to 10 mm. It is preferable from the viewpoint of forming a pocket with high leakage preventing property.

The napkin 1 of the present embodiment is fixed to the inner surface of clothes such as underwear by an anti-slip agent (not shown) formed on the surface (non-skin contact surface) on the back sheet 3 side as in the conventional napkin. do.

The napkin 1 is bent in the front and rear directions when worn. Even when the napkin 1 is curved by the above-described joining line 8, the bent portion generates hard bent portions, wrinkles occur in the sidesheet, or wrinkles caused by excessive deformation. It smoothly curves in the lengthwise direction without causing any damage to fit the wearer's body shape. Therefore, leakage before and after is effectively prevented.

Moreover, as shown in FIG. 5 by the curvature of the napkin 1, many pocket 84 naturally opens toward the width direction center part side of the napkin 1, These pockets 84 are a part of pocket 84 Even if) is pressed and crushed, the opening state of the other pocket 84 is easy to be maintained. According to this napkin 1, the good fitting property by the soft curve of the longitudinal direction, and the leakage at the side part of the napkin 1 are also prevented effectively by the many pockets 84 which are easy to maintain an opening state.

In the napkin 1 of this embodiment, as shown in FIG. 1 and FIG. 2, the whole bonding line 8 is formed on the said absorber 4 in the width direction of the napkin 1. As a result, a stable absorption surface along the body is formed on the absorber 4, and the wrinkles on the absorber side are prevented, so that more efficient absorption is possible. Instead of the form in which the entire joining line 8 is fixed on the absorber 4, only a part of the joining line 8, such as a part on the inner edge portion 61 side, is fixed on the absorber 4. You may.

Various well-known materials can be used as a formation material of the side sheet 6, For example, the sheet | seat made from a water repellent nonwoven fabric and a resin film is used preferably. In particular, it is preferable to use a water repellent nonwoven fabric in terms of good skin feel and prevention of side leakage. As the side sheet 6, you may use the laminated body of a nonwoven fabric and a resin film.

As the material for forming the front sheet 2, the back sheet 3, and the absorber 4, various kinds of materials conventionally used for absorbent articles such as sanitary napkins can be used without particular limitation.

The joining line is preferably in the form of a wave shape or a zigzag shape in that it forms a pocket and prevents side leakage by opening the pocket during mounting. As the waveform, in addition to the waveform shown in Fig. 3, the waveform shown in Fig. 4 may be used. An example of a zigzag bonded line is shown in FIG.

The absorbent article of the present invention has a thickness of 0.5 to 3.5 mm, particularly 1.0 to 2.0 mm, making it difficult to cause discomfort at the time of mounting, fits more along the front and rear direction of the body, and easily opens the pocket at the time of mounting, and prevents leakage. Since this further improves, it is preferable. The lower limit value of the thickness is a lower limit value mainly from the viewpoint that wrinkles at the time of wearing are unlikely to occur.

The thickness of the napkin 1 (absorbent article) can be measured as follows.

<Measurement of thickness>

The product is placed on a flat place without wrinkles or wrinkles, and a load of ⁵ cN / cm ² is applied to the upper surface of the region where the absorber of the product is placed, and the thickness under the condition is measured. The mounting pressure at the time of wearing the napkin varies depending on the part of the body, individual differences, and conditions (sitting / moving). since no load is the load of ~ 5cN / cm ^2, it was measured at a load (5cN / cm ^2). PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG. CO. LTD.) Was used for the measurement of the thickness in the present invention. At this time, place the plate (acrylic plate of thickness about 5mm) on the measuring part between the tip of the thickness meter and the product and adjust the size of the plate so that the load becomes 5cN / cm ² (the shape of the plate is round or square). ).

8-11, the sanitary napkin 1 'as another embodiment of this invention is shown.

About the sanitary napkin 1 ', a different point from the sanitary napkin 1 mentioned above is mainly demonstrated, and the description about the same point is abbreviate | omitted. About the point which is not specifically demonstrated, it is the same as that of the napkin 1 mentioned above. 8-11, the same code | symbol is written on the same member as the member of the sanitary napkin 1 mentioned above.

The pair of side sheets 6 and 6 in the napkin 1 'of this embodiment are joined to the absorbent main body 10 by the 1st bonding line 8' and the 2nd bonding line 9, respectively. That is, each of the site sheets 6 is positioned before and after the first joining line 8 'and the first joining line 8' which form a concave shape toward the widthwise center side of the absorbent body 10, and the absorbent body 10 Is joined to the absorbent body 10 at a second bonding line 9 extending to intersect in the longitudinal direction. A pocket 84 opening at the time of wearing is formed between the first joining line 8 'and the inner edge portion 61 of each of the pair of side sheets 6 and 6.

As shown in FIG. 8, the 1st bonding line 8 'in each pair of side sheets 6 and 6 of the napkin 1' of this embodiment is the excretion part opposing part A of the napkin 1 '. And rear portions B located rearward from the deflecting portion opposing portions (hereinafter, the first joining portion formed in the excavating portion opposing portions A is formed at 8A and the rear portion B). First junction is also referred to as 8B). The excretion part opposing part A in the absorbent article provided with the wing part 71 fixed to clothing outer surfaces, such as underwear, like this napkin 1 'is a part which has a wing in both sides.

As shown in FIG. 8, the pair of side sheets 6 and 6 are joined to the absorbent body 10 at the first bonding line 8A and the first bonding line 8B, respectively. The first bonding line 8A and the first bonding line 8B are continuous in the longitudinal direction of the absorbent body 10, respectively. The longitudinal direction of the absorptive main body is the same direction as the front-back direction of the wearer at the time of attachment in a napkin, panty liner, incontinence pad, etc. In this embodiment, it is a direction parallel to the inner edge part 61. As shown in FIG.

In this embodiment, the 1st joining line 8A formed in the said excretion part opposing part A and the 1st joining line 8B formed in the back part B are the same except that the part in which it is formed is different. Has a configuration. In the following, the first junction line 8A of the excretion section opposing portion A will mainly be described, but the description thereof applies in the same way to the first junction line 8B.

As shown in FIG. 10, the first joining line 8A extends in the longitudinal direction in an arc shape, and the portions 81 and 81 close to the inner edge portion 61 and the portion 82 far from the inner edge portion 61. Have Length L1 in the longitudinal direction of the first bonding line 8A (see FIG. 10), the separation distance W1 between the portion 81 near the inner edge portion of the first bonding line 8A and the portion 82 far from the inner edge portion. (Hereinafter also referred to as swing width) preferably satisfies the relationship L1> W1. L1 has a length of 10 to 50% of the length of the product, and W1 preferably has a width of 3 to 30% of the width of the product. The product width here means the length of the width direction between the front-back ends of each of the pair of wings 71 and 71 in the napkin 1 '. In addition, "close" and "far" as used herein are relative meanings of being close to a far portion and far from a close portion.

In addition, it is preferable that the 1st and 2nd bonding line is one joining line substantially continuous as a whole. That is, it is preferable that the 1st junction line and the 2nd junction line are respectively substantially continuous junction lines, and it is preferable that the 1st junction line and the 2nd junction line are also substantially continuous. Substantially continuous means that in addition to the continuous joint line like this embodiment, when a certain straight line parallel to the width direction of an absorbent article is assumed, it arrange | positions continuously so that there may be no part which does not overlap with the said straight line. In the microscopic view, it is composed of a plurality of discontinuous joints, but in general, it includes the same as forming a linear joint, and the joint lines are arranged in the longitudinal direction of the napkin so that a part of the joints overlap each other. Also includes. For example, as shown in FIG. 4, the joining line which arrange | positions several short junction parts 85 mutually and overlaps in the longitudinal direction of a napkin is also a substantially continuous joining line. However, the shortest distance between the junctions 85 is preferably within 2mm.

As shown in FIG. 8, the length L10 (refer FIG. 8) of the 1st bonding line 8A formed in the excretion part opposing part A is substantially equal to the length of the base of the wing | blade part 71. As shown in FIG.

As shown in FIG. 9, the 1st bonding line 8A in the napkin 1 'of this embodiment surfaces a part of part 6A located in the width direction center side of the napkin 1' by heat embossing process. It is bonded to the sheet 2 and formed.

The first bonding line 8A is formed by bonding the side sheet 6 to the surface sheet 2 only as in the present embodiment, or the side sheet 6 is fixed to the absorber together with the surface sheet 2, When a groove is not formed in the said 1st joining line substantial part of an absorber, it is preferable at the point that an absorbent article becomes softer and the fitting property with respect to a body improves.

The first bonding line 8A may be formed by integrally pressing the side sheet 6 together with the surface sheet 2 and the absorber 4. In this case, there is an advantage that the infiltration and diffusion of the liquid are suppressed by the grooves formed in the portion of the first bonding line 8A.

The portion 83 (see FIG. 10) between the inner edge portion 61 and the first bonding line 8A in each of the pair of side sheets 6 and 6 is not bonded to the surface sheet 2. A pocket 84 is formed between the portion 83 and the surface sheet 2. The pocket 84 is opened at the time of wearing as shown in FIG. 11, and since the body fluid moved in the width direction of a napkin is collected in the opened pocket 84, leakage prevention property can be improved. In addition, since it is easy to understand that the leakage preventing property of the width direction also in an external appearance is preferable at the point which gives comfort to a wearer.

Furthermore, it is preferable that at least a part of the first bonding line 8A overlap the absorber 4 when viewed in plan view because the liquid collected in the pocket 84 is smoothly absorbed by the absorber and leakage resistance is further improved. The liquid collected in the pocket 84 is absorbed by the absorber 4 between moving from the front to the inside of the pocket 84 or returned to the absorber side after reaching the inside of the pocket 84 and absorbed.

The overlapping of the absorber 4 in plan view means that all or part of the first joint line 8A is present in the region where the absorber is disposed (in the region enclosed by the dotted lines denoting the outline of the absorber in FIG. 8). . In the first bonding line 8A, at least a part of the portion existing in the swing width W1 preferably overlaps the absorber 4, and the entirety of the portion existing in the swing width W1 overlaps the absorber 4. It is more preferable that there is. In this embodiment, as shown in FIG. 8, the 1st junction line 8A overlaps with the absorber 4 the whole part which exists in the said fluctuating width W1 over the full length.

In the napkin 1 'of this embodiment, as shown in FIG. 8, before and after the 1st bonding line 8A, the 2nd bonding line 9C and the 2nd bonding line 9A are respectively formed, and the 1st bonding line Before and after 8B, the 2nd junction line 9A and the 2nd junction line 9B are connected, respectively. The first junction line 8A is connected to the first junction line 8B through the second junction line 9A. In addition, the 2nd joining line 9C and the 2nd joining line 9A are arrange | positioned in the position of the front-back end of the pair of wings 71 and 71 in the longitudinal direction of the napkin 1 '. As shown in FIG. 8, the pair of side sheets 6 and 6 are joined to the absorbent body 10 at the second bonding line 9A, the second bonding line 9B, and the second bonding line 9C, respectively. The second bonding line 9A, the second bonding line 9B, and the second bonding line 9C are continuous in the longitudinal direction of the absorbent body 10, respectively.

As shown in Fig. 10, the second joining line 9A meanders alternately between the portion 91 close to the inner edge portion and the portion 92 far from the inner edge portion, and more specifically in the longitudinal direction. It has a zigzag shape. Between the portion 91 close to the inner edge portion and the portion 92 far from the inner edge portion, the bonding line forming the second bonding line 9A extends so as to intersect in the longitudinal direction.

In detail, the 2nd joining line 9A has the convex arc-shaped part which convex toward the width direction center side of the napkin 1 ', and the concave arc-shaped part which alternately connected toward the width direction center side of the napkin 1' are alternately connected. It does not have a part parallel to the longitudinal direction of the napkin 1 '. Moreover, it is preferable that 9 A of 2nd joining lines have two said concave arc-shaped parts, and are respectively the same shape.

In the second bonding line 9A, the distance L2 between the portions close to the inner edge portions adjacent to each other is shorter than the length L1 in the longitudinal direction of the first bonding line 8A, as shown in FIG. 10. . The distance L2 is a length measured along the longitudinal direction of the distance between the points closest to each inner edge portion in the portions 91 near the inner edge portions adjacent to each other.

In addition, the separation distance (W3: refer to FIG. 10 hereinafter, also called swing width) of the part 91 near the inner edge part of the 2nd bonding line 9A, and the part 92 far from the inner edge part is obtained by heat embossing. It is preferable that it is longer than the actual width W2 (refer FIG. 10) of 1 junction line 8A. The first joint line 8A has a predetermined width, and both edges of the first joint line 8A are regarded as two straight lines that are microscopically parallel, so the actual width W2 refers to the distance between the two parallel lines.

The portion 93 (see FIG. 10) between the second bonding line 9A and the inner edge portion 61 in each of the pair of side sheets 6 and 6 is not bonded, and the portion 93 and the surface thereof are not joined. A pocket 94 (hereinafter also referred to as a small pocket) is formed between the sheets 2. It is preferable to open a pocket as shown in FIG. 11 at the time of wearing.

9 A of 2nd joining lines in this embodiment are the surface sheets 2, and a part of part 6A located in the width direction center side of the napkin 1 'by heat embossing similarly to 8A of 1st joining lines. It is formed by joining with. In addition, the description in above-mentioned 1st bonding line 8A applies suitably about the joining of 9A of 2nd bonding lines and the absorbent main body 10. FIG.

Furthermore, it is preferable that at least a part of the second joint line 9A overlap the absorber 4 in plan view, because the liquid collected in the pocket 94 is smoothly absorbed by the absorber, and leakage resistance is further improved. In this embodiment, as shown in FIG. 8, the 2nd junction line 9A overlaps with the absorber 4 the whole part which exists in the oscillation width W3 over the full length. In addition, the description in above-mentioned 1st bonding line 8A applies suitably about the overlap of 9A of 2nd bonding lines and the absorbent main body 10. FIG.

In the above description, the second junction line 9A has been mainly described, but for the points not specifically mentioned, the same applies to the second junction line 9B and the second junction line 9C, including the preferred configuration.

In each of the pair of side sheets 6 and 6, one small pocket 94 formed of the second joining line 9 may be formed before and after the large pocket 84, and a plurality of ones are preferably formed. . In the case where the first joining line 8B is not formed in the rear portion B, the first joining line 8A of the excrement facing portion A is extended from the longitudinal front and rear ends to the front and rear end edges of the napkin 1 '. The meandering of the two joining lines 9 may be repeated. When the 1st joining line 8B is formed in the back part B, what is necessary is to have at least one small pocket between the 1st joining line 8A and the 1st joining line 8B, but it is preferable that it is a some pocket. And it is more preferable that 2-5 pieces are formed.

It is preferable that the area | region in which the small pocket 94 was formed by the 2nd bonding line has a length of 10% or more with respect to the 1st bonding line length L1 before and after each of the 1st bonding lines. It is preferable that the length of the napkin length direction of each pocket 94 is 4% or more with respect to L1.

In this embodiment, as shown in FIG. 8, the 2nd joining line 9A which spreads over the excretion part opposing part A and the back part B forms two small pockets 94 and 94, and a front part The second joint line 9C of (C) forms four small pockets 94, 94 ..., and the second joint line 9B of the rear part B has three small pockets 94, 94, 94).

It is preferable that the length L1 of the longitudinal direction of the 1st bonding line 8A in the napkin 1 'of this embodiment is 40-100 mm, and the length of the 2nd bonding line 9A in the longitudinal direction (meandering is repeated). It is preferable that it is 4-50 mm, and the longer side of L1 is preferable.

Moreover, it is preferable that the said distance L2 in 9 A of 2nd bonding lines is 4-30 mm. L2 / L1 is preferably 4 to 75%.

Moreover, it is preferable that the rocking width W1 of 8 A of 1st bonding lines is 2-15 mm, and the rocking width W3 of 9 A of 2nd bonding lines is 2-15 mm. It is preferable that W1 is the same as W3 or larger than W3.

According to the napkin 1 'of this embodiment, it has the 1st joint line 8A which forms the large pocket 84 in the excretion part opposing part A which is easy to produce a distortion at the time of wearing, and is before and after the 2nd Because of the bonding lines 9A and 9C, even if distortion occurs in the napkin 1 ', the small pocket 94 formed by the second bonding lines 9A and 9C deforms and the distortion of the napkin 1' is absorbed. Therefore, the large pocket 84 in the excretion part opposing part A can collect the liquid moved to the width direction, without crushing by a twist. Furthermore, the napkin 1 ′ is easily warped in the hip portion when worn, but the back portion B also has the first bond line 8B and the second bond lines 9A and 9B before and after the leak prevention property. It is improved further.

In addition, the napkin 1 'is formed by connecting a plurality of first bonding lines 8' and second bonding lines 9, respectively, over the entire length of the pair of side sheets 6 and 6 in the longitudinal direction. Since the second joining line 9 forming the small pocket 94 is formed in three places of the excretion opposing part A, the front part C, and the rear part B, it is regular over the full length of the longitudinal direction. As it is bent, it is easy to bend back and forth and is excellent in fitting characteristics.

In the napkin 1 'of this embodiment, as shown in FIG. 8, the whole of the some 1st bonding line 8' and the 2nd bonding line 9 in the width direction of the napkin 1 'are the said absorber 4 It is formed on). As a result, a stable absorbing surface along the body is formed on the absorbent body 4, thereby preventing the wrinkles on the absorber side portion and allowing more efficient absorption. Instead of the form in which the entirety of the plurality of first joining lines 8 'and the second joining lines 9 are fixed on the absorber 4, the first joining lines 8' such as a part of the inner edge portion 61 side and the like. And a part of each of the second joint lines 9 may be fixed on the absorber 4.

Each of the first joint line 8 'and the second joint line 9 in the pair of side sheets 6 and 6 has a concave shape at the center in the width direction to form a pocket, and the pocket is opened when worn. The prevention of the side gland of (1 ') can be improved.

The present invention can be appropriately modified without departing from the spirit of the present invention without being limited to the above-described embodiment.

For example, the absorbent article of the present invention may not have a wing portion. The bonding line may be formed by bonding the side sheet to a surface sheet, absorber, back sheet, etc. with an ultrasonic chamber, a high frequency chamber, an adhesive, or the like.

In addition, the side sheet 6 uses a stretchable material on its own or arranges a thread-like elastic material (for example, a real rubber or a flat rubber) near the inner edge 61 thereof. May be inserted into the sidesheet 6 bent from the inner edge portion 61 to facilitate pocket formation (opening). When fixing an elastic material, you may fix an elastic material with a joining line, and you may fix with a hot melt adhesive etc. separately.

As shown in FIG. 7, a part of the joint line 8 may protrude from the inner edge portion 61 of the sidesheet in a direction close to the longitudinal center line CL of the absorbent body 10. Such protruding portions, formed in the same manner as the other portions of the joining line, are part of the joining line even if the sidesheet and the other member are not joined. The bonding line 8 shown in FIG. 7 is formed by performing heat seal processing on the laminate of the side sheet 6 and the surface sheet 2, and the heat seal processing is performed only by the portion where both sheets are laminated and the surface sheet. Because it was spread over the part, a protruding part was created.

Like the napkin 1 'described above, the first bonding line 8A having a concave shape toward the center in the width direction of the absorbent body 10 and the second bonding line extending to cross the longitudinal direction of the absorbent body 10 ( In 9), when joining the side sheet 6 and the absorbent main body 10, the second joining line may be extended so as to intersect in the longitudinal direction, and may not be a meandering continuous line. The second joining line may be provided with a plurality of straight lines which are not parallel in the width direction, or may have a meandering shape formed discontinuously.

Moreover, only one 1st junction line may be sufficient, and it may be provided in multiple numbers. When plural numbers are formed, it is preferable that the swing width W1 and the length L1 of one first joining line satisfy the relationship of L1 &gt; W1, and the swing width W1 between each first joining line. ) And / or the length L1 may be different.

The distance L2 and the swing width W3 in one second joining line 9 may be different among zigzag shapes.

In the above-described napkin 1 ', the second joint line was zigzag-shaped, but the curved line may be curved.

In addition, a part of the 1st joining line 8 'and the 2nd joining line 9 may protrude from the inner edge part 61 of a side sheet to the width direction center side of the absorptive main body 10. As shown in FIG.

It goes without saying that the side sheet 6 may be joined to the absorbent body and an adhesive in a portion other than the first bonding line 8 'and the second bonding line 9.

In addition to a sanitary napkin, the absorbent article of the present invention may be a panty liner (mucus sheet), an incontinence pad, or the like. In addition, the pocket in the absorbent article of this invention is not limited to opening at the time of attachment.

According to the absorbent article of the present invention, it can be bent smoothly in the longitudinal direction at the time of wearing so as to fit well to the wearer's body shape, and at the same time, excellent leakage preventing property can be obtained by a plurality of pockets. Formation of the first and second joint lines of the above-described form maintains the leakage preventing effect due to the pockets more stably during wearing, and also improves the fitability of the wearer's body shape by better bending the absorbent article.

Claims (9)

An absorbent article having a longitudinally long absorptive body having a liquid retaining absorbent layer and a liquid impermeable leakage preventing layer, and a pair of sidesheets disposed at each of both side portions on the skin contacting surface side of the absorbent body, Wherein each sidesheet is bonded to the absorbent body in a continuous line in the longitudinal direction of the absorbent body and is made of a water repellent nonwoven fabric, The joining line has a plurality of alternating portions which are close to the longitudinal centerline of the absorbent body and the portion farther from the centerline, respectively. Pockets are formed between portions close to the longitudinal center line adjacent to each other in the side sheets, And wherein the absorbent layer comprises a liquid permeable surface sheet and a liquid retaining absorbent, wherein at least a portion of the bond line overlaps the absorbent in plan view. delete delete The absorbent article as set forth in claim 1, wherein the joining line is corrugated or zigzag in plan view. The absorbent article as set forth in claim 1, wherein the absorbent article has a thickness of 0.5 to 3.5 mm. 2. The pair of said side sheets are respectively located before and after the longitudinal direction of the 1st junction line which forms concave shape toward the width direction center side of the said absorptive main body, and the absorptive main body of the said 1st junction line, Joined to the absorbent body at a second joint line extending to cross the longitudinal direction of the absorbent body, The pocket which opens at the time of wearing between the said 1st joining line in each of a pair of said side seat | sheet, and an inner edge part is formed, The second joint line alternately has a portion close to the inner edge portion and a portion far from the inner edge portion, and the distance between the portions close to the inner edge portion adjacent to each other is greater than the length in the longitudinal direction of the first joint line. Absorbent article, characterized in that short. 7. The absorbent article as set forth in claim 6, wherein said second joint line in said pair of said side sheets has a wave shape or a zigzag shape. 7. The absorbent layer of claim 6, wherein the absorbent layer comprises a liquid permeable surface sheet and a liquid-retaining absorbent, wherein at least a portion of each of the first bond line and the second bond line overlaps the absorber in plan view. Absorbent articles. 7. The absorbent article as set forth in claim 6, wherein the first joining line is formed at an opposite side of the excretory part of the absorbent article and a rear part located rearward from the opposite side of the excretory part.

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