JP6410673B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

  Conventionally, disposable diapers are known as absorbent articles. For example, Patent Document 1 includes a front waist panel located in the front waist region, a rear waist panel located in the rear waist region, and a crotch panel attached to the non-skin facing surfaces of the front waist panel and the rear waist panel; The thing provided with the collar panel which covers the said collar part facing the wearer's collar part at the time of wear is disclosed.

  The crotch panel is provided with an absorbent body (liquid absorbing structure) for absorbing liquid, and the central portion of the absorbent body and the central portion of the collar panel are arranged to overlap each other. In addition, a plurality of elastic bodies that can be expanded and contracted in the lateral direction are disposed on the buttocks panel. The plurality of elastic bodies are cut so that a non-elastic region is formed in the central portion of the buttock panel, and at least a first elastic region and a first elastic region that can contract in the horizontal direction are formed on both sides of the non-elastic region. Two elastic regions are formed.

JP 2013-94422 A

  In the thing of patent document 1, all the horizontal expansion-contraction forces of the multiple-strand elastic body arrange | positioned along with the up-down direction in the 1st elastic region and 2nd elastic region of a collar panel are substantially uniform. For example, when applying a removable absorbent pad to the disposable diaper, if the elastic force of multiple strips is adjusted to be strong so that the absorbent pad does not deviate from its proper position, the degree of lateral shrinkage of the buttocks panel May increase, making it difficult to place the absorber. On the other hand, if the elastic force of the multiple strips is adjusted to be weak in order to make it easier to place the absorbent pad, the lateral shrinkage of the buttock panel will be reduced, and the absorbent pad will deviate from the proper placement position. There was a possibility.

  This invention is made | formed in view of the above problems, The place made into the objective is to provide the absorbent article which suppresses the shift | offset | difference of an absorption pad and is easy to arrange | position.

The main invention for achieving the above object has a vertical direction, a front-rear direction, and a width direction intersecting the vertical direction and the front-rear direction,
A ventral exterior member covering the abdomen of the wearer from the front;
A backside exterior member covering the back side of the wearer from behind;
An absorbent main body having an absorbent body, one side joined to the abdominal exterior member, the other side joined to the back exterior member, and supporting a band-shaped absorbent pad that absorbs excrement;
An absorbent article comprising:
The back side exterior member has a skin side member located in front of the absorbent main body, and a non-skin side member located in the rear of the absorbent main body,
Between the skin side member and the absorbent main body, one end of the absorbent pad in the longitudinal direction can be disposed,
In the non-skin side member,
When the absorbent pad is disposed between the absorbent main body and the skin-side member, the absorbent main body, the skin-side member, and a position overlapping with the one end of the absorbent pad in the front-rear direction, At least one first elastic member is joined in a state of being stretched across the width direction; and
When the absorbent pad is disposed between the absorbent main body and the skin side member, it is below the first elastic member, and overlaps the absorbent main body and the absorbent pad in the front-rear direction, At least one second elastic member is bonded to the skin-side member in a position that does not overlap in the front-rear direction, in a state of being stretched across the width direction,
The tension in the width direction of the first elastic member is greater than the tension in the width direction of the second elastic member ,
Of the overlapping region overlapping the absorbent main body in the front-rear direction, the region where the first elastic member is disposed is the upper overlapping region, and the region where the second elastic member is disposed is the lower overlapping region. When
In the upper overlapping region, the amount of contraction in the width direction of the non-skin side member is larger than that in the lower overlapping region . Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to suppress the displacement of the absorbent pad and to arrange it easily.

It is a perspective view which shows one structural example of the diaper which concerns on embodiment of this invention. It is a cross-sectional schematic diagram at the time of cut | disconnecting a diaper to an up-down direction. It is a top view at the time of seeing the diaper of the unfolded state from the lower part. It is sectional drawing which cut | disconnected the absorptive main body in the thickness direction. It is a top view which shows a non-skin side member, FIG. 5A shows the state which is not curving, and FIG. 5B has shown the curved state.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

  An abdominal exterior member that has a vertical direction, a front-rear direction, and a width direction that intersects the vertical direction and the front-rear direction, covers the wearer's abdomen from the front, and covers the wearer's back from the rear An absorptive main body having a back side exterior member, an absorbent body, one side joined to the abdomen side exterior member, the other side joined to the back side exterior member, and supporting a band-shaped absorbent pad that absorbs excrement The back side exterior member has a skin side member located in front of the absorbent main body, and a non-skin side member located in the rear of the absorbent main body, One end of the absorbent pad in the longitudinal direction can be disposed between the skin-side member and the absorbent main body, and the non-skin-side member is disposed between the absorbent main body and the skin-side member. When the absorbent pad is disposed, the absorbent main body, the skin side member, and the absorbent pad A first elastic member is joined to a position overlapping the one end portion of the door in the front-rear direction in a state of being stretched across the width direction, and the absorption is performed between the absorbent main body and the skin-side member. When the pad is disposed, it is below the first elastic member, and overlaps the absorbent main body and the absorbent pad in the front-rear direction and does not overlap the skin-side member in the front-rear direction. An absorbent article in which two elastic members are joined in an extended state in the width direction, and the tension in the width direction of the first elastic member is larger than the tension in the width direction of the second elastic member. Becomes clear.

  Thereby, since the tension | tensile_strength of the width direction of a 1st elastic member is larger than the tension | tensile_strength of the width direction of a 2nd elastic member, in the area | region in which the 1st elastic member was provided, a non-skin side member is a 2nd elastic member. It becomes easier to shrink in the width direction than the provided region. Therefore, due to the action of the tension of the first elastic member that is larger than the tension of the second elastic member adjusted to such an extent that the absorbent main body does not shrink excessively in the width direction, the widthwise direction in the space where the one end of the absorbent pad is located The gap can be filled. Accordingly, while suppressing the displacement of the absorbent pad by the action of the tension of the first elastic member, the excessive shrinkage in the width direction of the absorbent main body is suppressed by the action of the tension of the second elastic member, making it easier to place the absorbent pad. be able to.

  In such an absorbent article, on both sides of the first elastic member in the width direction, the third elastic member is inclined from the upper side toward the first elastic member with the third elastic member extended in the width direction. The fourth elastic member is provided on both sides of the second elastic member in the width direction so as to be inclined from the upper side toward the second elastic member with the fourth elastic member extended in the width direction. Preferably, the tension in the width direction of the fourth elastic member is larger than the tension in the width direction of the third elastic member.

  Thereby, since the tension | tensile_strength of the width direction of a 4th elastic member is larger than the tension | tensile_strength of the width direction of a 3rd elastic member, in the area | region in which the 4th elastic member was provided, a non-skin side member is a 3rd elastic member. It becomes easier to shrink in the width direction than the provided region. Therefore, in the region where the fourth elastic member is provided, the non-skin side member forms a curved surface. Therefore, it becomes a shape along the rounded shape of the wearer's buttocks, leading to suppression of excrement leakage.

  In this absorbent article, the third elastic member extends from both ends in the width direction of the first elastic member, and the fourth elastic member extends in the width direction of the second elastic member. It is desirable to extend from both ends.

  Thereby, it is not necessary to provide the first elastic member and the third elastic member as separate members, and similarly, it is not necessary to provide the second elastic member and the fourth elastic member as separate members. It becomes easy and leads to cost reduction.

  In this absorbent article, it is preferable that the second elastic member and the fourth elastic member are provided in a region of 10 mm or less upward from the lower end of the non-skin side member.

  Thereby, since the back side exterior member can be manufactured with a small amount of material by providing the second elastic member and the fourth elastic member in the limited region of 10 mm or less upward from the lower end of the non-skin side member, the cost can be reduced. Connected.

  In this absorbent article, it is desirable that the tension of the fourth elastic member is larger than the tension of the second elastic member.

  Thereby, since the tension | tensile_strength of the width direction of a 4th elastic member is larger than the tension | tensile_strength of the width direction of a 2nd elastic member, in the area | region in which the 4th elastic member was provided, a non-skin side member is a 2nd elastic member. It becomes easier to shrink in the width direction than the provided region. Therefore, excessive shrinkage in the width direction of the absorbent main body is suppressed by the action of the tension of the second elastic member, making it easier to place the absorbent pad, and the tension of the fourth elastic member larger than the tension of the second elastic member. By the action, the non-skin-side member can form a curved surface to fit the wearer's buttocks, leading to suppression of excrement leakage.

  In such an absorbent article, it is preferable that the tension of the fourth elastic member decreases from the outside in the width direction toward the inside.

  Thereby, the non-skin side member can form a smooth inclination (curve) from the outer side in the width direction toward the inner side (second elastic member side) by the action of the tension of the fourth elastic member. While it becomes the shape along with the shape of the heel part which was tinged, the clamp | tightening (biting-in) with respect to the heel part at the time of wear can be suppressed.

  In this absorbent article, in the fourth elastic member, the vertical distance between the uppermost position and the lowermost position is preferably 5 to 90 mm.

  Thereby, when the inclination width in the fourth elastic member is 5 to 90 mm, it becomes a shape that conforms to the shape of the wearer's rounded buttock, so that it becomes possible to cover the buttock and prevent the excrement from leaking. Leads to suppression.

  In such an absorbent article, the non-skin-side member includes an overlapping region that overlaps the absorbent main body in the front-rear direction, and both side regions that are located on both sides in the width direction of the overlapping region, and the both side regions It is desirable that the lower end of the projection protrudes downward from the lower end of the ventral side exterior member.

  Thereby, when the abdominal side exterior member and the back side exterior member are joined over the entire vertical direction on both sides in the width direction, when the wearer passes the foot through the absorbent article, A situation in which a foot is caught on the lower end side is likely to occur. On the other hand, when the wearer passes his legs through the diaper because the lower end of both side regions protrudes below the lower end of the abdominal exterior member, the outer portion in the width direction is not joined to the abdominal exterior member. There is no part to be caught, you can pass your foot smoothly.

  In such an absorbent article, it is preferable that a joint portion between the non-skin side member and the absorbent main body extends in a direction orthogonal to the longitudinal direction of the absorbent main body.

  Thereby, since it is possible to align the direction of the force acting on the joint portion between the non-skin side member and the absorbent main body, the force acting on the absorbent main body is less likely to cause imbalance, and the generation of wrinkles is suppressed, It becomes easy to maintain a three-dimensional shape.

  In such an absorbent article, it is preferable that the tension of the second elastic member increases from the center in the width direction toward the outside.

  As a result, the absorbent pad arranged at the position overlapping with the second elastic member in the front-rear direction is easily fixed at both ends in the width direction, so that the absorbent pad is more difficult to shift with respect to the absorbent main body, and excrement leaks. Can be further suppressed.

  In such an absorbent article, it is preferable that the absorbent body has a thickness of 5 mm or less and a bending resistance measured by a JIS L 1096 cantilever A method is 15 mm or more and 140 mm or less.

  As a result, the absorbent body is formed of a thin and soft material, so it is possible to adjust the tension of each elastic member provided on the non-skin side member and deform it together with the absorbent main body, and change the design according to the application It becomes easy to do.

  In such an absorbent article, when the absorbent pad is disposed between the absorbent main body and the skin side member, the absorbent main body, the non-skin side member, and The back side elastic member is joined to the position where it overlaps with the one end part of the absorption pad in the front-rear direction in a state where the back side elastic member is extended in the width direction, and the tension in the width direction of the back side elastic member is It is desirable that the tension in the width direction of the first elastic member and the tension in the width direction of the second elastic member are larger.

  Accordingly, the skin-side member closer to the wearer's skin is more easily contracted than the non-skin-side member to which the first elastic member and the second elastic member are joined, and the curved surface that is convex toward the non-skin side is formed. Since it becomes easier to form, a space between the absorbent main body and the skin-side member of the backside exterior member is secured, and it becomes easier to insert one end of the absorbent pad in the longitudinal direction into the space, and the one end is It is easy to place the absorbent pad at an appropriate position while suppressing a positional shift such that the pad is shifted out of the space.

=== Embodiment ===
As an example of the absorbent article according to the embodiment of the present invention, a disposable diaper 1 (hereinafter simply referred to as diaper 1) will be described. This diaper 1 is a disposable diaper for adults mainly for elderly people, and is used in, for example, a nursing facility.

<Configuration of diaper 1>
The structure of the diaper 1 is demonstrated with reference to FIGS.

  FIG. 1 is a perspective view showing a configuration example of a diaper 1 according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view when the diaper 1 is cut in the vertical direction. FIG. 3 is a plan view of the unfolded diaper 1 as viewed from below.

  The diaper 1 has a vertical direction, a front-rear direction, and a width direction that intersects the vertical direction and the front-rear direction. In the state where the wearer wears the diaper 1, the side in contact with the skin of the wearer is defined as “skin side”, and the opposite side is defined as “non-skin side”.

  As shown in FIG. 1, the diaper 1 includes an abdominal exterior member 2 that covers the abdomen of the wearer from the front, a back exterior member 3 that covers the back of the wearer from the back, and a ventral exterior member 2 on one side. And an absorbent main body 4 whose other side is joined to the backside exterior member 3 via the wearer's crotch. As shown in FIG. 2, the absorptive main body 4 supports a urine collecting pad 5 as a strip-shaped absorption pad that absorbs excrement such as urine. In FIG. 2, the urine removing pad 5 is indicated by a two-dot chain line.

  The ventral-side exterior member 2 is a sheet member formed of a soft nonwoven fabric or the like. As shown in FIG. 3, the ventral-side exterior member 2 has a rectangular shape in plan view and has long sides in the width direction. As shown in FIG. 2, the abdominal exterior member 2 includes a main member 2 a positioned further on the skin side (rear side) than the urine absorbing pad 5 disposed on the skin side with respect to the absorbent main body 4, and the absorbent main body 4. And a ventral side auxiliary member 2b positioned on the non-skin side (front side).

  The main member 2a is composed of two non-woven fabrics that are overlapped and joined in the front-rear direction, and a plurality of strips (18 in this embodiment) that are arranged in the state of being stretched in the width direction between the two non-woven fabrics. It is composed of a ventral side rubber thread 20. In FIG. 3, the ventral side rubber thread 20 is indicated by a two-dot chain line. The two nonwoven fabrics are contracted in the width direction by the tension in the width direction of the ventral side rubber thread 20. Thereby, the abdominal side exterior member 2 can be fitted to a wearer's stomach.

  The ventral auxiliary member 2b is made of a single non-woven fabric or the like, and has one side 41 of the main member 2a and the absorbent main body 4 with the one side 41 in the longitudinal direction of the absorbent main body 4 sandwiched between the main member 2a. It is joined with. The ventral auxiliary member 2b has a function of enhancing the pulling strength when the diaper 1 is worn. Furthermore, since the ventral auxiliary member 2b is joined to the main member 2a and the one side 41 of the absorbent main body 4 from the front, the ventral exterior member 2 and the absorptive member are compared with the case where the ventral auxiliary member 2b is not provided. The bonding strength with the one side 41 of the main body 4 is increased.

  The backside exterior member 3 is a sheet member formed of a soft nonwoven fabric or the like, similar to the abdominal side exterior member 2. As shown in FIG. 3, the back exterior member 3 has a shape in which one long side of a rectangle having long sides in the width direction is curved in plan view. As shown in FIG. 1, the abdominal exterior member 2 and the back exterior member 3 are joined to each other in the width direction by, for example, fusion such as heat seal or sonic seal, or an adhesive such as a hot melt adhesive. . Thereby, as shown in FIG.1 and FIG.3, the junction part 10 is extended and provided in the up-down direction at the both sides of the width direction, respectively.

  As shown in FIG. 2, the back-side exterior member 3 includes a skin-side member 3 a located on the front side (skin side) of the absorbent main body 4 and a non-skin side located on the rear side (non-skin side) of the absorbent main body 4. The member 3b and the back side auxiliary member 3c located behind the absorptive main body 4 (non-skin side) and above the non-skin side member 3b are provided. Between the skin side member 3 a and the absorbent main body 4, it is possible to arrange a back side end portion 51 which is one end portion in the longitudinal direction of the urine collecting pad 5.

  When the urine absorbing pad 5 is disposed between the skin side member 3a and the absorbent main body 4, the skin side member 3a has a back side of the absorbent main body 4, the non-skin side member 3b, and the urine absorbing pad 5. A plurality of back-side rubber threads 30 are joined to a position overlapping the end portion 51 in the front-rear direction in a state of being stretched across the width direction. Specifically, the skin side member 3a includes two non-woven fabrics that are overlapped and joined in the front-rear direction, and a plurality of strips that are joined in a stretched state between the two non-woven fabrics in the width direction (this embodiment). In this case, it is composed of 16 back-side rubber threads 30. In FIG. 3, the back thread rubber 30 is indicated by a two-dot chain line. The two nonwoven fabrics are contracted in the width direction by the tension in the width direction of the back-side thread rubber 30. Thereby, the back side exterior member 3 can be fitted to a wearer's back (waist).

  The non-skin side member 3b includes two non-woven fabrics that are overlapped and joined in the front-rear direction, and a first thread rubber 31, a second thread rubber 32, and a third thread rubber 33 disposed between the two non-woven fabrics. , And a fourth rubber thread 34. In FIG. 3, the first thread rubber 31, the second thread rubber 32, the third thread rubber 33, and the fourth thread rubber 34 are indicated by two-dot chain lines in the same manner as the ventral thread rubber 20 and the back thread rubber 30. Yes.

  Further, as shown in FIG. 3, the non-skin side member 3 b includes an overlapping region 301 that overlaps the absorbent main body 4 in the front-rear direction, and both side regions 302 that are located on both sides in the width direction of the overlapping region 301. In the overlapping region 301, a joint portion 300 between the non-skin side member 3b and the absorbent main body 4 is provided, and the joint portion 300 extends in a direction orthogonal to the longitudinal direction of the absorbent main body 4. In FIG. 3, the joint portion 300 is shaded.

  As described above, the joint portion 300 is linearly provided in a direction orthogonal to the longitudinal direction of the absorbent main body 4, so that the force along the vertical direction of the absorbent main body 4 (force to hang down). ) Can be received at the joint portion 300, which leads to suppression of the sagging of the absorbent main body 4. That is, since the direction of the force acting on the joint portion 300 is easily aligned, the imbalance of the force acting on the absorbent main body 4 is less likely to occur, the generation of wrinkles in the absorbent main body 4 is suppressed, and the three-dimensional shape of the diaper 1 It becomes easy to maintain a natural shape.

  The 1st rubber thread 31 is one mode of the 1st elastic member which can be expanded and contracted in the width direction, and as shown in Drawing 2, urine picking pad 5 is arranged between skin side member 3a and absorptive main part 4. In this case, the absorbent body 4, the skin-side member 3 a, and the urine absorption pad 5 are joined to a position overlapping with the longitudinal back side end portion 51 in the front-rear direction while being stretched in the width direction. . As shown in FIG. 3, in the present embodiment, one first rubber thread 31 is provided in the overlapping region 301, but the number is not particularly limited.

  The second rubber thread 32 is an aspect of a second elastic member that can expand and contract in the width direction. As shown in FIG. 2, the urine absorbing pad 5 is disposed between the skin side member 3 a and the absorbent main body 4. When extending, it extends over the width direction at a position below the first rubber thread 31, overlapping the absorbent body 4 and the urine removing pad 5 in the front-rear direction and not overlapping the skin-side member 3 a in the front-rear direction. It is provided in the state that was done. As shown in FIG. 3, in the present embodiment, four second rubber bands 32 are provided in the overlapping region 301, but the number is not particularly limited.

  The third rubber thread 33 is an aspect of a third elastic member that can expand and contract in the width direction. As shown in FIG. 3, the third rubber thread 33 is stretched in the width direction on both sides of the first thread rubber 31 in the width direction. In this case, they are joined while being inclined from the upper side toward the first rubber thread 31. In the present embodiment, the first thread rubber 31 and the third thread rubber 33 are a single member, and the third thread rubber 33 is extended obliquely upward from both sides in the width direction of the first thread rubber 31. Yes.

  Thereby, since it is not necessary to arrange | position the 1st thread rubber 31 and the 3rd thread rubber 33 by a separate member, respectively, manufacture becomes easy and it leads also to the reduction of cost. In addition, one third rubber rubber 33 is provided in each of the both side regions 302, but the number of the third rubber rubbers 33 is not particularly limited as with the first rubber rubber 31.

  The fourth rubber thread 34 is an aspect of a fourth elastic member that can be expanded and contracted in the width direction. As shown in FIG. 3, the second rubber thread 34 is stretched in the width direction on both sides in the width direction of the second rubber thread 32. In this case, they are joined while being inclined from the upper side toward the second rubber thread 32. In the present embodiment, the second thread rubber 32 and the fourth thread rubber 34 are a single member, and the fourth thread rubber 34 extends obliquely upward from both sides in the width direction of the second thread rubber 32. Yes.

  As a result, as with the first and third thread rubbers 31 and 33, the second and fourth thread rubbers 32 and 34 do not need to be provided as separate members. It also leads to cost reduction. Further, four fourth rubber bands 34 are provided in each of the two side regions 302, but the number of the fourth rubber threads 34 is not particularly limited, as with the second rubber thread 32.

  In addition, in 1st-4th thread rubber 31-34, "joined in the state extended over the width direction" means when each of 1st-4th thread rubber 31-34 is observed entirely. What is necessary is just the state extended | stretched over the width direction, for example, the state loosened partially in the width direction may be included.

  In this embodiment, the whole area | region where the 4th rubber | gum rubber 34 is arrange | positioned in the both-sides area | region 302 protrudes below rather than the lower end of the ventral | abdominal exterior member 2 (refer FIG. 1). That is, as shown in FIG. 3, the joint portion 10 does not exist in the region where the fourth rubber bands 34 are disposed in the both side regions 302. Note that the entire region where the fourth rubber thread 34 is disposed does not necessarily protrude below the lower end of the ventral exterior member 2, and at least the lower ends of both side regions 302 are lower than the lower end of the ventral exterior member 2. What is necessary is just to protrude below.

  Temporarily, when the abdominal side exterior member 2 and the back side exterior member 3 are joined over the whole up-and-down direction in the both sides of the width direction, when a wearer passes a leg through the diaper 1, the junction part 10 is shown. There is a possibility that a situation may occur in which the foot is caught on the lower end side of the. On the other hand, if the lower end of both side regions 302 protrudes below the lower end of the ventral side exterior member 2, the outer side portion in the width direction of both side regions 302 is not joined to the ventral side exterior member 2, so that the wearer When the foot is passed through 1, the portion that becomes a hook is lost and the foot can be passed smoothly.

  The back-side auxiliary member 3c is made of a single non-woven fabric or the like, and the skin-side member 3a and the absorbent main body 4 other than the skin-side member 3a with the other side 42 in the longitudinal direction of the absorbent main body 4 sandwiched therebetween. It is joined to the side. The back side auxiliary member 3c has a function of enhancing the pulling strength when the diaper 1 is worn, similarly to the abdominal side auxiliary member 2b. Further, the back side auxiliary member 3c is joined to the skin side member 3a and the other side 42 of the absorbent main body 4 from the rear, so that the back side exterior member 3 and the absorption are compared with the case where there is no back side auxiliary member 3c. The strength of joining with the other side 42 of the sex main body 4 is increased.

  As shown in FIGS. 1 and 3, the absorbent main body 4 has legs on both sides in the width direction so as to fit around the wearer's leg when worn and prevent excrement such as urine from leaking outside. A gather 40 is provided. In FIG. 3, the leg gathers 40 are indicated by shading.

  FIG. 4 is a cross-sectional view of the absorbent main body 4 cut in the thickness direction. In FIG. 4, the thickness direction of the absorbent main body 4 perpendicular to the width direction is defined as “thickness direction”, and the side in contact with the skin is “skin side” and the opposite side is “non-skin” Side ".

  The absorbent main body 4 includes an absorber 43, a back sheet 44 disposed on the non-skin side in the thickness direction, and a back film 45 disposed between the absorber 43 and the back sheet 44 in the thickness direction. Have. In the present embodiment, each of the back film 45 and the back sheet 44 is folded at both ends in the width direction toward the skin side in the thickness direction so as to wrap the absorber 43.

  The absorbent body 43 includes two liquid absorbent sheets 431 stacked in the thickness direction, and a pair of core wrap sheets 432 disposed so as to sandwich the two liquid absorbent sheets 431 in the thickness direction, And a top sheet 433 disposed on the skin side in the thickness direction. As the liquid absorbent sheet 431, for example, a so-called SAP sheet formed by laminating liquid absorbent materials is used.

  In the present embodiment, the top sheet 433 has both end portions in the width direction toward the non-skin side in the thickness direction so as to wrap the liquid absorbent sheet 431 sandwiched between the pair of core wrap sheets 432 in the thickness direction. Wrapped.

  Further, in this embodiment, the absorbent body 43 is formed in a band shape using a nonwoven fabric having a thickness of 5 mm or less and a bending resistance measured by the JIS L 1096 cantilever A method of 15 mm or more and 140 mm or less. Yes. Thus, by using a thin and soft material for the absorbent body 43, the tension of the first to fourth thread rubbers 31 to 34 provided on the non-skin side member 3b is adjusted, and the absorbent main body 4 The shape can be deformed, and the design can be easily changed according to the application. In FIG. 3, the absorber 43 is shown with the broken line.

  The urine absorbing pad 5 is a band-shaped member that absorbs excrement, and a so-called SAP sheet formed by laminating liquid absorbent materials is used. In the present embodiment, the urine removing pad 5 uses an SAP sheet composed only of an absorbent polymer. However, the urine removing pad 5 is not limited to this, and the urine removing pad 5 is more than 10% of the total weight of the urine removing pad 5. It may contain pulp having a low weight. The urine absorbing pad 5 is formed so that the widthwise dimension is smaller than the widthwise dimension of the absorbent main body 4, and movement in the widthwise direction is regulated by the leg gathers 40 when supported by the absorbent main body 4. .

  When the urine removing pad 5 is disposed on the diaper 1, the back side end 51, which is one end in the longitudinal direction of the urine removing pad 5, is between the absorbent main body 4 and the skin side member 3 a of the back side exterior member 3. The ventral end 52, which is the other end, is positioned in the space 12 formed between the absorbent main body 4 and the main member 2a of the ventral exterior member 2 (FIG. 2). reference).

<About the first to fourth thread rubbers 31 to 34>
Next, the 1st-4th rubber threads 31-34 provided in the non-skin side member 3b are demonstrated concretely with reference to FIG. 5A and 5B.

  5A and 5B are plan views showing the non-skin side member 3b. FIG. 5A shows a non-curved state, and FIG. 5B shows a curved state. 5A and 5B, the first to fourth rubber threads 31 to 34 are indicated by two-dot chain lines.

  5B, in the overlapping region 301, a region where the first rubber band 31 is disposed is an upper overlapping region 301a, and a region where the second rubber band 32 is disposed is a lower overlapping region 301b. Of these, an area where the third rubber thread 33 is disposed is an upper both-side area 302a, and an area where the fourth rubber thread 34 is disposed is a lower both-side area 302b.

  The first thread rubber 31, the second thread rubber 32, the third thread rubber 33, and the fourth thread rubber 34 are arranged between the two nonwoven fabrics in a state in which the magnification (extension ratio) is changed in the width direction by the periodic shift. It is installed. Periodic shift is a technique in which each thread rubber is wound around a speed change roller whose rotational speed changes periodically, thereby forming a portion with a large elongation or a small portion to change the magnification. In the present embodiment, the second rubber thread 32 and the fourth rubber thread 34 are collectively wound around a speed change roll to perform periodic speed change. Further, not only the first thread rubber 31, the second thread rubber 32, the third thread rubber 33, and the fourth thread rubber 34, for example, the abdominal thread rubber 20 and the back thread rubber 30 are similarly cyclically shifted. The magnification may be changed by going.

  Here, “magnification (stretching magnification)” indicates the degree of elongation when the natural length of the rubber thread is 1, and for example, when the magnification is 1.2, the rubber thread is reduced from the natural length to 0. That is, it is stretched by 2.

  In the present embodiment, for example, the first rubber thread 31 is 940 [dtex] thick rubber thread with an average magnification of 1.6, and the second rubber thread 32 is 470 [dtex] thick rubber thread. The average magnification is 1.3, the third rubber thread 33 is 940 [dtex] thick rubber thread, the average magnification is 1.6 to 1.8, and the fourth rubber thread 34 is 470 [dtex] thick. Are stretched to an average magnification of 2.5. As described above, the first rubber thread 31, the second rubber thread 32, the third rubber thread 33, and the fourth rubber thread 34 are averaged because the magnification is different at each point in the width direction due to the cyclic shift. It is shown as a numerical value (average magnification).

  In the present embodiment, the second rubber thread 32 is disposed in a state where the absorbent main body 4 extends in the width direction with a tension T2 that does not excessively contract in the width direction. Therefore, in the lower overlapping region 301b, the two nonwoven fabrics are contracted in the width direction to such an extent that the absorbent main body 4 is not excessively contracted in the width direction by the action of the tension T2. Therefore, the excessive shrinkage | contraction of the width direction of the absorptive main body 4 is suppressed, and it is easy to arrange | position the urine picking pad 5 with respect to the absorptive main body 4. FIG. In this specification, the unit of tension is N (Newton).

  The tension T1 of the first rubber thread 31 is larger than the tension T2 of the second rubber thread 32 (T1> T2). That is, the first rubber thread 31 is disposed in a state of being stretched in the width direction with a tension T1 larger than the tension T2 of the second rubber thread 32. For this reason, in the upper overlapping region 301a, the shrinkage amount in the width direction of the two nonwoven fabrics is larger than that in the lower overlapping region 301b. Thereby, in the upper overlapping region 301a, the two nonwoven fabrics are formed so that no gap is generated in the width direction in the space 11 (see FIG. 2) in which the back side end portion 51 of the urine collecting pad 5 is arranged by the action of the tension T1. Shrink in the width direction.

  Assuming that the tension T1 of the first thread rubber 31 is equal to or less than the tension T2 of the second thread rubber 32, in the upper overlapping region 301a, the shrinkage amount in the width direction of the two nonwoven fabrics is less than or equal to the shrinkage amount in the lower overlapping region 301b. Therefore, there is a possibility that a gap is generated in the width direction in the space 11 and the urine collecting pad 5 is displaced.

  Therefore, since the magnitude relationship between the tension T1 of the first rubber thread 31 and the tension T2 of the second rubber thread 32 is TI> T2, the displacement of the urine removing pad 5 is suppressed by the action of the tension T1. It is possible to easily place the urine collecting pad 5 with respect to the absorbent main body 4 by the action of the tension T2.

  Furthermore, in the present embodiment, the tension T2 in the width direction of the second thread rubber 32 increases from the center in the width direction toward the outside (the fourth thread rubber 34 side). That is, in the lower overlapping region 301b, the shrinkage amount in the width direction of the two nonwoven fabrics is larger on both sides (outside) than the center in the width direction. In this case, the urine collecting pad 5 that is arranged to overlap with the second rubber thread 32 in the front-rear direction is easily fixed at both ends in the width direction and is less likely to be displaced with respect to the absorbent main body 4. Can be further suppressed. The tension T2 of the second thread rubber 32 does not necessarily increase as it goes from the center in the width direction to the outside. At least the tension T2 of the second thread rubber 32 is smaller than the tension T1 of the first thread rubber 31. That's fine.

  Further, the tension T1 in the width direction of the first thread rubber 31 and the tension T2 in the width direction of the second thread rubber 32 are larger than the tension T0 in the width direction of the back-side thread rubber 30 (see FIG. 2) in the skin side member 3a. Small (T2 <T1 <T0 in this embodiment). In other words, the tension T0 in the width direction of the back thread rubber 30 is larger than the tension T1 in the width direction of the first thread rubber 31 and the tension T2 in the width direction of the second thread rubber 32.

  In the skin side member 3a closer to the wearer's skin than the non-skin side member 3b, the tension T0 in the width direction of the dorsal thread rubber 30 is the tension T1 in the width direction of the first thread rubber 31 and the width of the second thread rubber 32. Since it is easier to shrink than the direction tension T2, a curved surface that is convex toward the non-skin side is more easily formed, and the space 11 between the absorbent main body 4 and the skin side member 3a described above is secured, It becomes easy to insert the back end 51 of the urine removing pad 5 into the space 11, and the urine removing pad 5 is properly controlled by suppressing the positional deviation that the back side end 51 is inserted out of the space 11. It becomes easy to arrange in the position.

  As shown in FIGS. 3 and 5B, when the first thread rubber 31, the second thread rubber 32, the third thread rubber 33, and the fourth thread rubber 34 are disposed between the two nonwoven fabrics, While curving the two nonwoven fabrics so that the region 302 is inclined from the upper side toward the overlapping region 301, the first thread rubber 31, the second thread rubber 32, the third thread rubber 33, and the fourth thread rubber 34 are It is sandwiched between these two nonwoven fabrics. At this time, the third thread rubber 33 and the fourth thread rubber 34 are inclined from the upper side toward the first thread rubber 31, and the fourth thread rubber 34 is inclined from the upper side toward the second thread rubber 32, respectively. The fourth rubber thread 34 is also curved.

  The third rubber thread 33 extends in a state in which the tension T3 in the width direction is adjusted so as not to excessively tighten the wearer's skin. This tension T3 is a reference for the third rubber thread 33 in the present embodiment. Thereby, in the upper both side area | region 302a, two nonwoven fabrics are shrink | contracted in the width direction so that a wearer's skin may not be tightened too much by the effect | action of tension | tensile_strength T3.

  When the diaper 1 is worn, the fourth rubber thread 34 extends in a state in which the tension T4 in the width direction is adjusted so as to follow the shape of the wearer's buttocks. This tension T4 is a reference for the fourth rubber thread 34 in the present embodiment. Thereby, in the lower both side area | region 302b, the two nonwoven fabrics are shrink | contracted in the width direction so that the shape of a wearer's buttocks may be followed by the effect | action of tension | tensile_strength T4.

  In the present embodiment, since the tension T4 of the fourth rubber thread 34 is larger than the tension T3 of the third rubber thread 33 (T4> T3), the two nonwoven fabrics are divided between the upper side area 302a and the lower side area 302b. The amount of shrinkage in the width direction of the two nonwoven fabrics is different, and the amount of shrinkage is larger in the lower side regions 302b than in the upper side regions 302a. Thereby, two nonwoven fabrics form a curved surface in the lower side regions 302b rather than the upper side regions 302a. Therefore, it becomes a shape along the rounded shape of the wearer's buttocks, leading to suppression of excrement leakage.

  Although it is desirable that the tension T4 of the fourth thread rubber 34 is larger than the tension T3 of the third thread rubber 33, this is not always necessary, and at least the tension T1 of the first thread rubber 31 is the tension of the second thread rubber 32. It only needs to be larger than T2.

  Further, in this embodiment, since the tension T4 of the fourth rubber thread 34 is larger than the tension T2 of the second rubber thread 32 (T4> T2), the two nonwoven fabrics are located on both lower regions than the lower overlapping region 301b. In 302b, the amount of shrinkage increases in the width direction.

  Assuming that the tension T4 of the fourth rubber thread 34 is equal to or less than the tension T2 of the second rubber thread 32, the shrinkage amount in the width direction of the two nonwoven fabrics is equal to or less than the shrinkage amount in the lower overlapping region 301b. Therefore, the two non-woven fabrics are difficult to form a curved surface and do not follow the shape of the wearer's buttocks, which may cause excrement leakage.

  Therefore, since the magnitude relationship between the tension T2 of the second rubber thread 32 and the tension T4 of the fourth rubber thread 34 is T4> T2, the urine absorbing pad 5 with respect to the absorbent main body 4 by the action of the tension T2. It becomes possible to make it fit in the shape of a wearer's buttocks by the effect | action of tension | tensile_strength T4. Although it is desirable that the tension T4 of the fourth thread rubber 34 is larger than the tension T2 of the second thread rubber 32, it is not always necessary, and at least the tension T1 of the first thread rubber 31 is the tension of the second thread rubber 32. It only needs to be larger than T2.

  Furthermore, in this embodiment, the tension T4 in the width direction of the fourth thread rubber 34 decreases from the outer side in the width direction toward the inner side (the second thread rubber 32 side). That is, in the lower side regions 302b, the shrinkage amount in the width direction of the two nonwoven fabrics is smaller on the inner side than on the outer side in the width direction. In this case, since the two nonwoven fabrics in the lower both side regions 302b can form a smooth curved surface from the outer side to the inner side in the width direction, the shape becomes in line with the rounded shape of the wearer's buttocks. It is possible to suppress tightening (biting into) the buttocks. It is not always necessary that the tension T4 of the fourth rubber thread 34 decreases from the outer side to the inner side in the width direction, and at least the tension T1 of the first thread rubber 31 is larger than the tension T2 of the second thread rubber 32. It only has to be a relationship.

  In the fourth rubber thread 34, the vertical distance h (shown in FIG. 4B) between the uppermost position and the lowermost position is set to 5 to 90 mm. More specifically, the distance h is the outer end portion in the width direction of the fourth thread rubber 34 positioned at the uppermost position among the four fourth rubber threads 34 and the fourth thread rubber 34 positioned at the lowermost position. It is the distance of the up-down direction between the inner edge parts of the width direction.

  For example, when there is one fourth rubber thread 34, the distance in the vertical direction between both ends in the width direction of the fourth rubber thread 34 is the distance h. That is, the distance h indicates the inclination width of the fourth rubber thread 34 in the vertical direction. When the distance h is 5 to 90 mm, it can be shaped according to the shape of the wearer's buttocks and can be fitted to the buttocks. The distance h is not necessarily 5 to 90 mm.

  In the present embodiment, the four second rubber threads 32 and the four fourth rubber threads 34 are provided in an area of 10 mm or less (H ≦ 10 mm) in the upward direction from the lower end of the non-skin side member 3 b ( 4A and 4B). Thus, by providing the 2nd thread rubber 32 and the 4th thread rubber 34 in the field near the lower end of the non-skin side member 3b, it is based on the tension of the 2nd thread rubber 32 and the 4th thread rubber 34 in the bottom of the diaper 1. The effect can be utilized effectively, and the non-skin side member 3b can be fitted to the wearer's buttocks. Furthermore, since the area | region which provides the 2nd thread rubber 32 and the 4th thread rubber 34 may be small, the back side exterior member 3 can be manufactured with few materials, and it leads to cost reduction.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

  In the above embodiment, the magnification of the first to fourth rubber threads 31 to 34 is changed in the width direction by the periodic shift. However, it is not always necessary to perform the periodic shift. For example, these are at a constant magnification in the width direction. The rubber thread may be stretched.

1 ... Diaper (absorbent article)
2 ... Ventral exterior member 3 ... Back side exterior member 3a ... Skin side member 3b ... Non-skin side member 4 ... Absorbent body 5 ... Urine collecting pad (absorption pad)
30. Back side rubber thread (back side elastic member)
31 ... 1st rubber thread (1st elastic member)
32. Second rubber thread (second elastic member)
33. Third rubber thread (third elastic member)
34. Fourth rubber thread (fourth elastic member)
41 ... One side 42 ... Other side 43 ... Absorber 51 ... Back side end (one end)
300 ... Junction 301 ... Overlapping region 302 ... Both sides region

Claims (12)

A vertical direction, a front-rear direction, and a width direction intersecting the vertical direction and the front-rear direction;
A ventral exterior member covering the abdomen of the wearer from the front;
A backside exterior member covering the back side of the wearer from behind;
An absorbent main body having an absorbent body, one side joined to the abdominal exterior member, the other side joined to the back exterior member, and supporting a band-shaped absorbent pad that absorbs excrement;
An absorbent article comprising:
The back side exterior member has a skin side member located in front of the absorbent main body, and a non-skin side member located in the rear of the absorbent main body,
Between the skin side member and the absorbent main body, one end of the absorbent pad in the longitudinal direction can be disposed,
In the non-skin side member,
When the absorbent pad is disposed between the absorbent main body and the skin-side member, the absorbent main body, the skin-side member, and a position overlapping with the one end of the absorbent pad in the front-rear direction, At least one first elastic member is joined in a state of being stretched across the width direction; and
When the absorbent pad is disposed between the absorbent main body and the skin side member, it is below the first elastic member, and overlaps the absorbent main body and the absorbent pad in the front-rear direction, At least one second elastic member is bonded to the skin-side member in a position that does not overlap in the front-rear direction, in a state of being stretched across the width direction,
The tension in the width direction of the first elastic member is greater than the tension in the width direction of the second elastic member ,
Of the overlapping region overlapping the absorbent main body in the front-rear direction, the region where the first elastic member is disposed is the upper overlapping region, and the region where the second elastic member is disposed is the lower overlapping region. When
The absorbent article, wherein in the upper overlapping region, the amount of contraction in the width direction of the non-skin side member is larger than that in the lower overlapping region . The absorbent article according to claim 1,
At least one third elastic member is provided on both sides of the first elastic member in the width direction so as to be inclined from the upper side toward the first elastic member in a state of being extended in the width direction. ,
At least one fourth elastic member is provided on both sides of the second elastic member in the width direction so as to be inclined from the upper side toward the second elastic member in a state of being extended in the width direction. ,
The tension in the width direction of the fourth elastic member is greater than the tension in the width direction of the third elastic member ,
Of the two side regions located on both sides of the overlapping region in the width direction, the region where the third elastic member is disposed is the upper side region, and the region where the fourth elastic member is disposed is the lower side region. When
The absorbent article , wherein the shrinkage amount of the non-skin side member in the width direction is larger in the lower both side regions than in the upper both side regions . The absorbent article according to claim 2,
The third elastic member extends from both ends in the width direction of the first elastic member,
The said 4th elastic member is each extended | stretched from the both ends of the said width direction of the said 2nd elastic member, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 2 or 3,
The said 2nd elastic member and the said 4th elastic member are provided in the area | region below 10 mm upward from the lower end of the said non-skin-side member, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 2 to 4,
The absorbent article, wherein the tension of each of the fourth elastic members is greater than the tension of each of the second elastic members. It is an absorptive article given in any 1 paragraph of Claims 2-5,
Each said tension | tensile_strength of a said 4th elastic member becomes small as it goes inside from the said width direction outer side, Absorbent article characterized by the above-mentioned. It is an absorptive article given in any 1 paragraph of Claims 2-6,
In the fourth elastic member, the distance in the vertical direction between the uppermost position and the lowermost position is 5 to 90 mm. The absorbent article according to any one of claims 2 to 7 ,
An absorbent article, wherein lower ends of the both side regions protrude downward from a lower end of the ventral exterior member. The absorbent article according to any one of claims 1 to 8,
The joint part of the said non-skin side member and the said absorptive main body is over the direction orthogonal to the longitudinal direction of the said absorptive main body, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 9,
Each said tension | tensile_strength of a said 2nd elastic member becomes large as it goes outside from the center of the said width direction, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 10,
The absorbent article has a thickness of 5 mm or less and a bending resistance measured by a JIS L 1096 cantilever A method of 15 mm or more and 140 mm or less. The absorbent article according to any one of claims 1 to 11,
In the skin side member, when the absorbent pad is disposed between the absorbent main body and the skin side member, the absorbent main body, the non-skin side member, and the one end of the absorbent pad, At least one dorsal elastic member is joined to the position overlapping in the front-rear direction in an extended state across the width direction,
Each of the tension in the width direction of the back side elastic member, being larger than each of the tension in the width direction of the respective tension and the second elastic member in the width direction of the first elastic member Absorbent article.

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