JP6718809B2 - Pants type absorbent article - Google Patents

Description

The present invention relates to pants-type absorbent articles.

As a pants-type absorbent article, for example, in Patent Document 1, an exterior body and an absorbent body fixed to the inner surface side of the exterior body are provided, and both sides of a ventral side portion and both sides of a back side of the exterior body are provided. There is disclosed a pants-type diaper in which a pair of side seal portions are formed by joining and. In Patent Document 1, by increasing the MFR (fluidity of the resin in a molten state) of the outermost layer sheet forming the exterior body to be larger than the MFR of the innermost layer sheet, the joint strength of the side seal portion is increased and I am flexible. Further, from the viewpoint of making the molten state of the innermost layer sheet uniform, it is preferable that the basis weight (weight per unit area) of the innermost layer sheet be smaller than that of the outermost layer sheet.

JP, 2013-102886, A

In a pants-type absorbent article, the outermost layer sheet (non-skin side sheet) and the innermost layer sheet (skin side sheet) so that the ventral side and back side (belt) of the exterior body fit around the waist of the wearer. An elastic member is fixed in a laterally extended state between the elastic members. Further, the absorbent main body is fixed to the innermost layer sheet. Therefore, when the basis weight of the innermost layer sheet is small as in Patent Document 1, the contraction force of the elastic member is less likely to be buffered by the innermost layer sheet, and is easily transmitted to the absorbent main body. When the absorbent main body contracts under the influence of the contraction of the elastic member, wrinkles are formed on the absorbent main body, which makes it easier for excrement to leak and reduces comfort.

The present invention has been made in view of the conventional problems as described above, and an object thereof is to provide a pants-type absorbent article in which the absorbent main body is not easily affected by the contraction of the belt portion.

The main invention for achieving the above object is to have a longitudinal direction, a lateral direction, and a thickness direction, and be folded in two in the longitudinal direction, and the longitudinal direction is an absorbent main body along the longitudinal direction, and in the lateral direction. A pair of belt parts along the pant-type absorbent article, which comprises a skin side sheet, a non-skin side sheet, and an adhesive between the skin side sheet and the non-skin side sheet. Having a laterally stretchable elastic member that is joined, a pair of non-skin side surface of the end portion in the longitudinal direction of the absorbent main body, and the skin side surface of the skin side sheet are joined. Having a joining region, the basis weight of the fibers of the skin side sheet is larger than the basis weight of the fibers of the non-skin side sheet, and the elastic member per unit length and the skin side sheet are joined together. The pants-type absorbent article is characterized in that the amount of the adhesive is less than the amount of the adhesive joining the elastic member and the non-skin side sheet per the unit length.
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 provide a pants-type absorbent article in which the absorbent main body is unlikely to be affected by the contraction of the belt portion.

It is a schematic front view of the pants-type disposable diaper 1 of 1st Embodiment. FIG. 3 is a schematic plan view of the diaper 1 in a developed and stretched state as seen from the skin side. It is a schematic sectional drawing of the AA line of FIG. It is a schematic sectional drawing of the BB line of FIG. It is explanatory drawing of the quantity of the adhesive agents 50 and 51 which have joined the elastic members 23 and 33, the skin side sheets 21 and 31, and the non-skin side sheets 22 and 32. It is explanatory drawing of the joining area|region 60. 7A is an explanatory diagram of the first application region 64, and FIG. 7B is an explanatory diagram of the second application region 65. It is explanatory drawing of the joining area|region 60 of the diaper 1 of 2nd Embodiment.

At least the following matters will be made clear by the present specification and the description of the accompanying drawings.
Pants type having a longitudinal direction, a lateral direction, and a thickness direction, folded in two in the longitudinal direction, and having an absorbent main body in which the longitudinal direction is along the longitudinal direction, and a pair of belt portions along the lateral direction. An absorbent article, wherein the belt portion is stretchable in the lateral direction, which is joined by an adhesive between the skin side sheet, the non-skin side sheet, and the skin side sheet and the non-skin side sheet. An elastic member, a non-skin side surface of the end portion in the longitudinal direction of the absorbent main body, and a skin side surface of the skin-side sheet having a pair of bonding regions are bonded, the skin-side sheet of The basis weight of the fibers is larger than the basis weight of the fibers of the non-skin side sheet, and the amount of the adhesive joining the elastic member and the skin side sheet per unit length is per unit length. The amount of the adhesive that bonds the elastic member to the non-skin side sheet is less than the amount of the adhesive, which is a pant-type absorbent article.

According to such a pant-type absorbent article, the cushioning property of the skin-side sheet is high, and the cushioning property is not easily inhibited by the adhesive, so that the contraction force of the elastic member is easily buffered by the skin-side sheet. Therefore, the absorbent main body is less likely to be affected by the contraction of the belt portion, and wrinkles are less likely to occur on the absorbent main body.

In such a pants-type absorbent article, at least one of the pair of joint regions connects a pair of first regions having a length in the lateral direction and the lateral end portions of the pair of first regions. A pair of second regions having a length in the longitudinal direction, and between the pair of first regions and between the pair of second regions, the absorbent main body and the skin-side sheet are joined. A pant-type absorbent article having a non-bonded region which is not formed.

According to such a pants-type absorbent article, the non-bonding region reduces the bonding region between the absorbent main body and the belt portion, and the absorbent main body is less susceptible to the contraction of the belt portion. Further, the pair of first regions can prevent the lower end portion of the belt portion and the upper end portion of the absorbent main body from being turned up. Further, when the absorbent article is pulled up, the pair of second regions facilitates the pulling force to be transmitted from the belt portion to the absorbent main body, and thus the absorbent main body is easily pulled up.

The pants-type absorbent article, wherein the non-bonding region has a longer length in the longitudinal direction than the lower first region of the pair of first regions. Type absorbent article.

According to such a pant-type absorbent article, the joint area between the absorbent main body and the belt portion becomes smaller, and the absorbent main body becomes less susceptible to the contraction of the belt portion.

In the pants-type absorbent article, the upper first region of the pair of first regions has a longer length in the longitudinal direction than the lower first region. It is a pants-type absorbent article.

According to such a pant-type absorbent article, the joint area between the absorbent main body and the belt portion becomes smaller, and the absorbent main body becomes less susceptible to the contraction of the belt portion. On the other hand, since the upper end portion of the absorbent main body is firmly joined to the belt portion, it is possible to prevent the wearing comfort from being deteriorated due to the absorbent main body being turned up.

In the pants-type absorbent article, the joining region located on the abdominal side of the wearer among the pair of joining regions has the non-joining region, and the joining region located on the back side of the wearer is the A pant-type absorbent article characterized by having no non-bonding region.

According to such a pants-type absorbent article, the back belt part is more easily separated from the absorbent main body than the abdominal belt part due to rubbing at bedtime, but the back side belt part is Is firmly joined to. Moreover, the absorbent main body is less likely to be affected by the contraction of the belt portion on the ventral side.

In the pants-type absorbent article, in the belt portion, the plurality of elastic members are arranged side by side in the longitudinal direction, and all the elastic members overlapping the absorbent main body in the thickness direction are provided. The pants-type absorbent article is characterized in that it overlaps with the joint region in the thickness direction.

According to such a pants-type absorbent article, it is possible to prevent local contraction of the belt portion due to large contraction of the elastic member that does not overlap with the joining region.

In such a pants-type absorbent article, in the belt portion, the plurality of elastic members are arranged side by side in the longitudinal direction, and the belt portion located on the back side of the wearer is the belly side of the wearer. Has a projecting region projecting below the belt portion located at, and a portion of the joining region that overlaps with the elastic member arranged in the projecting region in the thickness direction is the other elastic member and The pants-type absorbent article is characterized in that the length in the lateral direction is shorter than the region of the joining region that overlaps in the thickness direction.

According to such a pants-type absorbent article, the back side joint region is reduced, and the absorbent body is less susceptible to the contraction of the back side belt portion.

In such a pants-type absorbent article, of the plurality of elastic members arranged in the protruding region, a portion of the joining region that overlaps the lower elastic member in the thickness direction is the upper elastic member. And the length in the lateral direction is shorter than the portion of the joining region that overlaps in the thickness direction, the pants-type absorbent article.

According to such a pants-type absorbent article, the back side joint region becomes smaller, and the absorbent body is less susceptible to the contraction of the back side belt portion.

Such a pant-type absorbent article, wherein the absorbent main body has an absorbent body, and a part of the absorbent body located on the abdominal side of the wearer and a part of the absorbent body located on the back side of the wearer At least one of the two is thicker than the region of the absorber located in the crotch of the wearer, which is a pants-type absorbent article.

According to such a pants-type absorbent article, since the portion of the absorbent body that overlaps the belt portion is thick and has high rigidity, the absorbent main body is less susceptible to the contraction of the belt portion.

Hereinafter, as a pants-type absorbent article according to the present invention, an embodiment will be described by taking a pants-type disposable diaper for adults as an example. However, the pants-type absorbent article according to the present invention is not limited to diapers for adults, and can be used as diapers for infants, shorts-type sanitary napkins, and the like.

=== First Embodiment ===
<<Basic composition of pants-type disposable diaper>>
FIG. 1 is a schematic front view of a pants-type disposable diaper 1 (hereinafter referred to as “diaper”) of the first embodiment. FIG. 2 is a schematic plan view of the diaper 1 in the unfolded and stretched state as seen from the skin side. FIG. 3 is a schematic sectional view taken along line AA of FIG. FIG. 4 is a schematic sectional view taken along line BB of FIG.

The stretched state of the diaper 1 is a state in which the diaper 1 is stretched to such an extent that the wrinkles formed on the diaper 1 are substantially invisible. Specifically, it is a state in which the dimensions of each member (for example, the skin side sheets 21 and 31 described later) forming the diaper 1 are extended to a length that is equal to or close to the dimensions of the single member.

In the pants-type state, the diaper 1 has a vertical direction, a horizontal direction, and a thickness direction, and has a waistline opening BH and a pair of leg openings LH. The torso side of the wearer is the upper side and the crotch side of the wearer is the lower side in the vertical direction. The thickness direction is a direction in which the respective members constituting the diaper 1 are stacked, as shown in FIGS. 3 and 4. In the thickness direction, the side in contact with the wearer is the “skin side” and the opposite side is the “non-skin side”.

The diaper 1 is a three-piece type diaper having an absorbent main body 10 which is three rectangular members and a pair of belt members 20 and 30 (a pair of belt portions of the present invention). Of the pair of belt members 20 and 30, the one located on the wearer's ventral side is called the abdominal belt member 20, and the one located on the wearer's backside is called the back belt member 30. In the unfolded state shown in FIG. 2, the abdominal belt member 20 and the back belt member 30 are arranged such that their longitudinal directions are along the lateral direction of the diaper 1. Then, the lateral center portion of the abdominal belt member 20 is arranged at one end portion in the longitudinal direction of the absorbent main body 10, and the back belt is arranged at the other end portion in the longitudinal direction of the absorbent main body 10. A central portion in the lateral direction of the member 30 is arranged.

In the unfolded diaper 1 shown in FIG. 2, the absorbent main body 10 is folded in two at approximately the center in the longitudinal direction so that the longitudinal direction of the absorbent main body 10 is along the longitudinal direction of the diaper 1, and the abdominal belt member 20 The lateral side portions and the lateral side portions of the back belt member 30 are joined by welding or the like, whereby the pants-type diaper 1 shown in FIG. 1 is obtained.

The absorbent main body 10 includes an absorbent body 40, a topsheet 11 arranged on the skin side in the thickness direction of the absorbent body 40, and a backsheet 12 arranged on the non-skin side of the absorbent body 40 in the thickness direction. , And the exterior sheet 13. The top sheet 11 is a liquid-permeable sheet, and examples thereof include hydrophilic spunbonded nonwoven fabric and hydrophilic air-through nonwoven fabric. The back sheet 12 is a liquid impermeable sheet, and may be a polyethylene film or the like. Examples of the exterior sheet 13 include hydrophobic SMS non-woven fabric.

The top sheet 11 and the back sheet 12 when viewed in the thickness direction have the same planar shape and size as the absorbent main body 10, and cover both surfaces of the absorber 40. Further, as shown in FIG. 4, both lateral sides of the exterior sheet 13 are folded back twice on the skin side. An elastic member 14 for a three-dimensional gather portion, such as a rubber thread, is fixed in a state of extending in the longitudinal direction between the exterior sheets 13 having two layers in the first turn. A part of the exterior sheet 13 is folded back to the skin side with respect to the top sheet 11 by the second folding, and a three-dimensional gather portion 15 that can stand upright on the skin side is formed.

The absorber 40 has an absorbent core 41 that absorbs and holds excrements such as urine, and a core wrap sheet 42 that covers the absorbent core 41. As the absorbent core 41, a liquid absorbent fiber such as pulp containing a super absorbent polymer (SAP) formed into a predetermined shape (here, an hourglass shape) can be exemplified. As the core wrap sheet 42, a liquid permeable sheet such as a tissue paper or a non-woven fabric can be exemplified.

As shown in FIG. 3, the abdominal belt member 20 and the dorsal belt member 30 are skin side sheets 21 and 31, non-skin side sheets 22 and 32, and a plurality of waistline elastic members 23 and 33, respectively. And cover sheets 24 and 34. Examples of the sheets forming the abdominal belt member 20 and the back belt member 30 include flexible sheets such as SMS nonwoven fabric. As the waist elastic members 23 and 33, a thread-shaped elastic member such as rubber or spandex can be exemplified, but a sheet-shaped elastic member such as a stretchable nonwoven fabric or a stretchable film may be used.

The skin-side sheets 21 and 31 and the non-skin-side sheets 22 and 32 are arranged on the non-skin side in the thickness direction of the absorbent main body 10. The plurality of waist elastic members 23, 33 are arranged vertically between the skin-side sheets 21, 31 and the non-skin-side sheets 22, 32. In addition, the plurality of waist elastic members 23 and 33 are adhesive (for example, hot) between the skin-side sheets 21 and 31 and the non-skin-side sheets 22 and 32 in a state of being stretched in the lateral direction so that they can be expanded and contracted in the lateral direction. It is bonded with a melt adhesive.

The cover sheets 24, 34 have a shorter length in the longitudinal direction than the skin-side sheets 21, 31 and the non-skin-side sheets 22, 32, and are arranged on the skin side in the thickness direction of the absorbent main body 10. It covers the longitudinal ends of 10.

Although a three-piece type diaper is illustrated here, a diaper provided with a portion that connects a pair of belt portions, that is, a two-piece type diaper in which a pair of belt portions are formed by one member may be used. Good.

<<About joining of the belt members 20 and 30 and the absorbent main body 10>>
FIG. 5 is an explanatory diagram of the amounts of the adhesives 50, 51 that bond the elastic members 23, 33 to the skin side sheets 21, 31 and the non-skin side sheets 22, 32. FIG. 6 is an explanatory view of the joining region 60 where the belt members 20 and 30 and the absorbent main body 10 are joined.

As shown in FIGS. 3 and 6, in the diaper 1, the non-skin side surface of the longitudinal end of the absorbent main body 10 and the skin side surfaces of the skin side sheets 21 and 31 of the belt members 20 and 30 are hot. The absorbent main body 10 and the pair of belt members 20 and 30 are integrated with each other, having a pair of joining regions 60 joined by an adhesive such as a melt adhesive.

Therefore, in the diaper 1, the lateral contraction force of the belt members 20 and 30, that is, the lateral contraction force of the waist elastic members 23 and 33 is transmitted to the absorbent main body 10. However, when the contracting force of the elastic members 23 and 33 is largely transmitted to the absorbent main body 10, vertical wrinkles are formed in the portion of the absorbent main body 10 that overlaps with the belt members 20 and 30, and the excrement is discharged from the gap formed by the wrinkles. Will be easily leaked and the comfort will be reduced.

Therefore, in the diaper 1 of the present embodiment, the basis weight of the fibers of the skin side sheets 21 and 31 to which the absorbent main body 10 is bonded is made larger than the basis weight of the fibers of the non-skin side sheets 22 and 32. .. For example, the basis weight of the skin-side sheets 21 and 31 is set to 15 g/m ² , while the basis weight of the non-skin-side sheets 22 and 32 is set to 13 g/m ² . By increasing the basis weight of the skin-side sheets 21 and 31, the cushioning properties of the skin-side sheets 21 and 31 are enhanced, and the contraction force of the waist elastic members 23 and 33 is easily buffered by the skin-side sheets 21 and 31. Therefore, the contraction force of the waistline elastic members 23 and 33 is less likely to be transmitted to the absorbent main body 10.

Further, as shown in FIG. 5, by increasing the basis weight of the skin-side sheets 21 and 31, the voids between the fibers in the skin-side sheets 21 and 31 are reduced. Therefore, it becomes difficult for the adhesive 51 that joins the skin-side sheets 21 and 31 and the waistline elastic members 23 and 33 to be impregnated. That is, since the adhesive does not easily penetrate into the skin-side sheets 21 and 31, the cushioning properties of the skin-side sheets 21 and 31 can be prevented from being hindered by the rigidity of the adhesive 51.

Further, in the diaper 1 of the present embodiment, the amount of the adhesive 50 (for example, g/m) that joins the waist elastic members 23, 33 and the skin side sheets 21, 31 per unit length is equal to the unit length. The amount is smaller than the amount (eg: g/m) of the adhesive agent 51 that joins the waist elastic members 23, 33 to the non-skin side sheets 22, 32. Therefore, it is possible to further prevent the cushioning properties of the skin-side sheets 21 and 31 from being hindered by the rigidity of the adhesive 50.

In other words, in the diaper 1 of the present embodiment, since the amount of the adhesive 50 that joins the waistline elastic members 23, 33 and the skin side sheets 21, 31 is small, the skin side sheets 21, 31 and the waistline elastic member 23, The joint strength of 33 is weaker than the joint strength of the non-skin side sheets 22 and 32 and the waistline elastic members 23 and 33.

As described above, in the diaper 1 of the present embodiment, since the cushioning properties of the skin side sheets 21 and 31 are high and the cushioning property is not easily inhibited by the adhesive 50, the contraction force of the waist elastic members 23 and 33 is reduced. The skin side sheets 21, 31 are easily buffered. Therefore, the absorbent main body 10 is less susceptible to the contraction of the belt members 20 and 30, and wrinkles are less likely to occur in the absorbent main body 10. As a result, the close contact between the absorbent main body 10 and the wearer is enhanced, the leakage of excrement is suppressed, and the wearing comfort is also improved.

The skin-side sheets 21 and 31 are in direct contact with the wearer. Therefore, by reducing the amount of the adhesive 50 on the skin side sheets 21, 31 side, the rigidity of the skin side sheets 21, 31 is suppressed, and the feel of the belt members 20, 30 is improved.

Moreover, when the skin side sheets 21 and 31 are laminated nonwoven fabrics, the basis weight of the non-skin side layer (layers on the waistline elastic members 23 and 33 side) is preferably larger than the basis weight of the skin side layer. For example, when the skin-side sheets 21 and 31 are SMS non-woven fabrics (spunbond/melt blown/spunbond non-woven fabrics), the skin side S layer has a basis weight of 4.5 g/m ² , and the M layer basis weight is 1.5 g. /M ² , whereas the basis weight of the non-skin side S layer is preferably 9 g/m ² . By doing so, the skin-side sheets 21 and 31 are less likely to be impregnated with the adhesive 50, the cushioning properties of the skin-side sheets 21 and 31 are less likely to be hindered by the adhesive 50, and the absorbent main body 10 has the belt members 20 and 30. Is less susceptible to contraction.

In the diaper 1 of the present embodiment, the adhesive is not applied to the skin-side sheets 21 and 31 and the non-skin-side sheets 22 and 32, but the adhesive 50 is applied to the waist elastic members 23 and 33 by, for example, a V-slot method. , 51 shall be directly coated. By adjusting the positions of the adhesives 50 and 51 and the positions of the waistline elastic members 23 and 33 in the V-slot, the positions of the waistline elastic members 23 and 33 on the side joined to the non-skin side sheets 22 and 32 can be increased more. The amount of the adhesive 51 is applied. By doing so, the amount of the adhesive 50 that joins the waistline elastic members 23, 33 and the skin side sheets 21, 31 per unit length to the waistline elastic members 23, 33 per unit length and the non-skin side. The amount can be smaller than the amount of the adhesive 51 that joins the sheets 22 and 32.

Further, the comparison of the fiber basis weights (mass per unit area) of the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 may be performed by a known method. For example, the skin side sheets 21 and 31 and the non-skin side sheets 22 and 32 are separated from the belt members 20 and 30 of the target diaper 1 and cut into appropriate sizes, and the samples of the skin side sheets 21 and 31 and the non-skin sheets are cut. A sample of the side sheets 22 and 32 is acquired. Then, the mass and area of each sample may be measured, and the mass per unit area may be calculated and compared.

In addition, the amount of the adhesive 50 that joins the waistline elastic members 23 and 33 and the skin side sheets 21 and 31 per unit length, the waistline elastic members 23 and 33 and the non-skin side sheet 22 per unit length, The comparison with the amount of the adhesive 51 that bonds 32 is preferably performed by a known method. For example, a sample obtained by cutting the belt members 20 and 30 of the target diaper 1 into an appropriate size is obtained, and the adhesives 50 and 51 can be visually recognized on the skin side and the non-skin side of the sample. Apply. Then, a cross section taken in the longitudinal direction of the waist elastic members 23 and 33 and in the direction orthogonal thereto is enlarged and photographed with an electron microscope. Based on the photographed image, the amount of the adhesive 50 on the skin side sheets 21 and 31 and the amount of the adhesive 51 on the non-skin side sheets 22 and 32 are visually compared, or the areas are calculated and compared. It is good to

In addition, it is confirmed using a tensile tester that the joint strength between the skin-side sheets 21 and 31 and the waistline elastic members 23 and 33 is weaker than the joint strength between the non-skinside sheets 22 and 32 and the waistline elastic members 23 and 33. You may. Specifically, from the belt member 20, 30 of the target diaper 1, two samples that are long in the longitudinal direction of the waist elastic members 23, 33 and include one waist elastic member 23, 33 are obtained. To do. Then, the non-skin side sheets 22 and 32 are separated from one sample to form a sample in which the waistline elastic members 23 and 33 are joined to the skin side sheets 21 and 31, and the skin side sheet 21 is also used from the other sample. , 31 are separated to form a sample in which the waistline elastic members 23, 33 are joined to the non-skin side sheets 22, 32. Then, for each sample, a sheet (skin-side sheet 21, 31 or non-skin-side sheet 22, 32) is attached to one end of the chuck of the tensile testing machine so that the longitudinal direction of the waist elastic members 23, 33 becomes the tensile direction. , The waist elastic members 23 and 33 are attached to the other end. Then, the sample is pulled at a predetermined speed (for example, 300 mm/min), and the sheet and the waistline elastic members 23 and 33 are peeled off. The stress (maximum stress, average stress, etc.) at this time may be compared as the bonding strength between the sheet and the waistline elastic members 23, 33.

<< about the junction area 60 >>
FIG. 7A is an explanatory diagram of the first application region 64 in which the adhesive is applied to the belt members 20 and 30, and FIG. 7B is an explanatory diagram of the second application region 65 in which the adhesive is applied to the absorbent main body 10. Is. In the diaper 1 of the present embodiment, the belt members 20 and 30 are coated with an adhesive 64 (FIG. 7A), and the absorbent body 10 is coated with an adhesive 65 (FIG. 7B). ) Are overlapped with each other to form a joint region 60 (FIG. 6). In the following description, the joint region 60 located on the wearer's ventral side is also referred to as the ventral joint region 61, and the joint region 60 located on the wearer's back side is also referred to as the back side joint region 62.

More specifically, the first application region 64 is a region where the adhesive is applied to the skin side surfaces of the skin side sheets 21 and 31 of the belt members 20 and 30, and as shown in FIG. 7A, in the lateral direction of the diaper 1. It is a long rectangular area. In the back belt member 30, a plurality of (six in this case) first application regions 64 are arranged in the longitudinal direction of the diaper 1 at a minute interval. In the abdominal belt member 20, three first application areas 64 are arranged in the vertical direction. However, although the interval between the upper two first application regions 641 and 612 is very small, the interval between the second first application region 642 and the third first application region 643 from the top is large. The minute interval is, for example, an interval smaller than the interval between the waistline elastic members 23 and 33 arranged in the vertical direction.

The second application area 65 is an area in which the adhesive is applied to the non-skin side surface of the absorbent main body 10, and is a rectangular area that is long in the longitudinal direction of the diaper 1 as shown in FIG. 7B. At the end on the back side of the absorbent main body 10, a plurality of (here, seven) second application regions 65 are arranged in the lateral direction of the diaper 1 with no space or with a minute space. Also in the abdominal end of the absorbent main body 10, a plurality of (here, seven) second application regions 65 are arranged in the lateral direction with no space or with a minute space. However, on the ventral side, the vertical lengths of the second application regions 651 at both ends in the horizontal direction are the same as those of the second application regions 65 on the back side, whereas the vertical direction of the intermediate second application region 652 is the same. Is shorter than the second application region 65 on the back side, and is arranged closer to the end of the absorbent main body 10.

Therefore, as shown in FIG. 6, the back-side joining region 62 has a substantially rectangular outer shape due to the overlapping of the first coating region 64 and the second coating region 65, and almost all the inside is absorbed. It becomes a joining region between the main body 10 and the belt members 20 and 30.

On the other hand, the abdominal side joining region 61 has a substantially rectangular outer shape by overlapping the first application region 64 and the second application region 65, and has a substantially rectangular shape in which no adhesive is applied. Area exists. In other words, the ventral side joining region 61 connects the pair of first regions 61A having a length in the lateral direction and the end portions in the lateral direction of the pair of first regions 61A, and the pair of first regions having a length in the longitudinal direction. 2 regions 61B, and between the pair of first regions 61A and between the pair of second regions 61B, that is, a region where no adhesive is applied, that is, the absorbent main body 10 and the skin side sheet 21. , 31 has a non-bonded region 63 where they are not bonded.

By providing the non-bonding region 63 in this way, the bonding region 60 between the absorbent main body 10 and the belt members 20 and 30 becomes smaller, and the absorbent main body 10 is less susceptible to the contraction of the belt members 20 and 30. On the other hand, the upper end of the absorbent body 10 is joined to the belt members 20 and 30 by the upper first region 61A1, and the lower end of the belt members 20 and 30 is joined to the absorbent body 10 by the lower first region 61A2. Has been done. As a result, in the diaper 1, the upper end of the absorbent main body 10 and the lower ends of the belt members 20, 30 are prevented from being turned over, and the non-bonding region 63 is provided between them, so that wrinkling of the absorbent main body 10 occurs. Is suppressed.

Moreover, when the wearer holds the belt members 20 and 30 and pulls up the diaper 1 only when the joining region 60 has the pair of first regions 61</b>A, the absorbent main body 10 bends in the non-joining region 63, and the absorbability is increased. It becomes difficult to pull up the main body 10. On the other hand, the diaper 1 of the present embodiment is provided with the pair of second regions 61B connecting the pair of first regions 61A. Therefore, the pulling force is easily transmitted from the belt members 20 and 30 to the absorbent main body 10 by the second region 61B that is continuous in the longitudinal direction of the diaper 1, and the absorbent main body 10 can be firmly pulled up. Further, by disposing the second region 61B at the lateral end of the first region 61A, the absorbent main body 10 is difficult to twist and can be pulled up in a wide state, so that the absorbent main body 10 can be appropriately worn by the wearer. In close contact.

Further, as shown in FIG. 6, the lateral ends of the joining regions 60 (61, 62) on the ventral side and the dorsal side (the second region 61B in the joining region 61 on the ventral side) and the elasticity for the solid gather portion. The longitudinal end of the member 14 overlaps. Therefore, the pulling force is easily transmitted from the belt members 20 and 30 to the elastic member 14, and the entire absorbent main body 10 is easily pulled up in association with the rise of the elastic member 14. It should be noted that only the effective length portion of the elastic member 14 that exhibits elasticity is shown in the drawing, and the joint region 60 and the effective length portion of the elastic member 14 may overlap as shown in the drawing.

Further, in the abdominal joint region 61, the lower end 61Bb of the second region 61B is located lower than the lower end 61Ab of the first region 61A excluding the second region 61B. Therefore, in the abdominal-side joining region 61, the central portion in the horizontal direction has a short length in the vertical direction and is less susceptible to the contraction of the belt portion 20, and the end portion in the horizontal direction has a length overlapping with the elastic member 14. Becomes longer, and the absorbent main body 10 is easily pulled up.

It should be noted that the first coating region 64 and the second coating region 65 may be coated with an adhesive agent over the entire area thereof, or may be partially coated with the adhesive agent. Examples of the partial adhesive application pattern include a linear application pattern such as a spiral shape and a pattern in which dots are arranged. In the first application region 64, the adhesive pattern is continuous in the lateral direction of the diaper 1 or is minute. It is assumed that the adhesive is applied at regular intervals, and in the second application region 65, the adhesive is applied continuously in the longitudinal direction of the diaper 1 or at minute intervals.

In addition, as shown in FIG. 6, in the longitudinal direction of the diaper 1, the length L2 of the non-bonding region 63 may be made longer than the length L1 of the lower first region 61A2 of the pair of first regions 61A. Preferred (L1<L2). By doing so, the non-bonding region 63 becomes large and the bonding region 60 between the absorbent main body 10 and the belt members 20, 30 becomes small, so that the absorbent main body 10 is less susceptible to the contraction of the belt members 20, 30. Become. Therefore, the generation of wrinkles in the absorbent main body 10 can be further suppressed. Further, even if the lower end portions of the belt members 20 and 30 are turned up, the influence on the wearing comfort is small, so that a problem is unlikely to occur even if the length L1 in the vertical direction of the lower first region 61A2 is shortened.

Similarly, in the lateral direction of the diaper 1, it is preferable to make the length L5 of the non-bonding region 63 longer than the length L4 of the second region 61B (L4<L5). In FIG. 6, the length L5 of the non-bonding region 63 is about 5 times the length L4 of the second region 61B. By doing so, the absorbent main body 10 becomes less susceptible to the contraction of the belt members 20 and 30.

Further, in the longitudinal direction of the diaper 1, it is preferable to make the length L3 of the upper first region 61A1 longer than the length L1 of the lower first region 61A2 (L1<L3). If the upper end portion of the absorbent main body 10 is turned over, a step is generated in the diaper 1 and the wearing comfort is greatly affected. Therefore, by lengthening the length L3 of the upper first region 61A1 in the longitudinal direction and firmly joining the upper end portion of the absorbent main body 10 to the belt members 20 and 30, it is possible to prevent deterioration in wearing comfort. In other words, the length L1 of the lower first region 61A2 in the vertical direction is not set to be as long as the upper first region 61A1 so that the non-bonding region 63 can be made larger and the absorbent main body 10 can be made into the belt member 20. , 30 is less likely to be affected.

Further, in the diaper 1 of the present embodiment, the non-bonding region 63 is provided only in the ventral side bonding region 61, but the invention is not limited to this, and the non-bonding region may be provided in the center of the back side bonding region 62. Conversely, the non-bonding region 63 may not be provided in the abdominal side bonding region 61, and the non-bonding region may be provided only in the back side bonding region 62.

However, as compared with the abdominal belt member 20, the back belt member 30 is more likely to be sandwiched between the floor and a chair and the wearer and rubbed when the wearer is sleeping or sitting, and is easily separated from the absorbent main body 10. .. Therefore, as in the diaper 1 of the present embodiment, it is preferable to provide the non-bonding region 63 in the abdominal side bonding region 61 and not provide the non-bonding region in the back side bonding region 62 (note that this non-bonding region is not provided). Is a relatively large region, for example, a region in which the lengths in the horizontal and vertical directions are larger than the interval between the waistline elastic members 33). By doing so, the absorbent main body 10 is less susceptible to the contraction of the abdominal belt member 20 while preventing the back belt member 30 and the absorbent main body 10 from being separated.

The abdominal junction region 61 is located at the center of the wearer's abdomen, but the abdomen dents or swells for breathing. Therefore, by providing the non-bonding region 63 in the abdominal side bonding region 61, the rigidity of the belt member 20 that abuts on the center of the wearer's abdomen can be made as low as possible, and the discomfort during breathing can be reduced.

Further, as shown in FIG. 7B, the absorbent main body 10 has a non-application region 66 in which no adhesive is applied between the second application regions 651 at both ends in the lateral direction and the second application regions 652 therebetween. , Present on the ventral and dorsal sides, respectively. Therefore, as shown in FIG. 6, in the lateral position P corresponding to the non-application region 66 in the joining regions 60 (61, 62) on the ventral and dorsal sides, the adhesive is not applied, or the belt member is not applied. The adhesive may be applied only to the 20 and 30 sides. Therefore, at the position P of the joining region 60, the amount of adhesive applied is smaller and the rigidity is lower than that in the region adjacent in the lateral direction, so that the belt members 20 and 30 are likely to be the starting points of folding. Therefore, the belt members 20 and 30 are easily curved in a round shape around the waist of the wearer, and the wearing comfort is improved. In particular, since the abdomen is dented or swelled for breathing, the abdominal belt member 20 is easily bent, so that the discomfort during breathing can be further reduced.

Further, the waistline elastic members 23 and 33 that do not overlap the joining region 60 when viewed in the thickness direction of the diaper 1 are more likely to contract in the lateral direction than the waistline elastic members 23 and 33 that overlap the joining region 60. Therefore, if a part of the waistline elastic member (23a to 23i, 33a to 33i in FIG. 6) that overlaps with the absorbent main body 10 overlaps with the bonding region 60, part of it does not overlap with the bonding region 60. Then, a part of the belt members 20 and 30 contracts locally, and the belt members 20 and 30 easily twist.

Therefore, as shown in FIG. 6, all the waist elastic members (23a to 23i, 33a to 33i) overlapping the absorbent main body 10 in the thickness direction may overlap the bonding region 60 in the thickness direction. preferable. In other words, in the vertical direction of the diaper 1, the upper end 60a of the joining region 60 is located at a position corresponding to or above the uppermost waistline elastic members 23a, 33a overlapping the absorbent main body 10, and is also joined. It is preferable that the lower end 60b of the region 60 is located at a position matching the lowermost waistline elastic members 23i, 33i overlapping with the absorbent main body 10 or below the position. By doing so, it is possible to prevent the belt members 20 and 30 from twisting due to local contraction, and to firmly cover the wearer's waistline. Further, it is possible to prevent the appearance from being deteriorated and the discomfort when worn.

In addition, as shown in FIG. 3, the thickness of the absorber 40 may be varied depending on the longitudinal portions 40A to 40C of the absorber 40. For example, as compared with the thickness T2 of the crotch portion 40B of the absorber 40 located in the crotch portion of the wearer, the thickness T1 of the ventral side portion 40A of the absorber 40 located on the ventral side of the wearer and the back of the wearer. It is advisable to increase the thickness T3 of the back side portion 40C of the absorber 40 located on the side (T2<T1, T3). By doing so, the portion of the absorbent main body 10 that overlaps the belt members 20 and 30 in the thickness direction becomes thicker, and the rigidity is increased, so that wrinkling of the absorbent main body 10 due to the contraction of the belt members 20 and 30 can be suppressed. .. By suppressing the generation of wrinkles on the skin side surface of the absorbent main body 10 in this manner, it is possible to suppress the excrement from flowing and leaking along the wrinkles.

In particular, in the case of the diaper 1 of the present embodiment, the back joint region 62 does not have a non-joint region, so that the back side portion 40B of the absorbent body 40 is smaller than the thickness T1 of the abdomen side portion 40A of the absorber 40. It is preferable to make the thickness T3 thicker (T2<T1<T3). By doing so, the rigidity of the back end of the absorbent main body 10 that is more susceptible to the influence of the belt member 30 is higher than that of the abdominal end of the absorbent main body 10, and therefore the absorbability due to the contraction of the belt member 30 is increased. The occurrence of wrinkles in the main body 10 can be suppressed more reliably.

The comparison of the thickness of the absorber 40 may be performed by a known method. For example, the absorber 40 is separated from the target diaper 1, and a dial thickness gauge (ID-C1012C) manufactured by Mitutoyo Corporation or an equivalent thereof is used, and at an appropriate contact pressure (for example, 3 gf/cm ² ). It is advisable to apply pressure to each of the target parts 40A to 40C of the absorber 40 for measurement, and compare them. Alternatively, the comparison may be performed visually or by using an image obtained by photographing a cross section of the absorber 40 cut in the longitudinal direction.

=== Second Embodiment ===
FIG. 8: is explanatory drawing of the joining area|region 60 of the diaper 1 of 2nd Embodiment. In the diaper 1 according to the second embodiment, the back belt member 30 has a protruding region 70 that protrudes below the abdominal belt member 20. The lateral side end 70a of the projecting region 70 is inclined inward in the lateral direction toward the lower side in the longitudinal direction. The protruding region 70 covers the wearer's buttocks. Further, since the abdominal belt member 20 and the back belt member 30 have different shapes, it is possible to prevent the diaper 1 from being worn backwards and forwards.

In the back side belt member 30 of the second embodiment, in addition to the waistline elastic members 33 arranged in the lateral direction, a plurality of elastic members 71 in the longitudinal direction are arranged along the lower end portion of the projecting region 70 (here, 3 Books) are arranged side by side. Similarly to the waistline elastic member 33, the elastic member 71 of the projecting region 70 (hereinafter, the projecting region elastic member 71) is also bonded between the skin-side sheet 31 and the non-skin-side sheet 32 so as to be stretchable in the lateral direction. It is joined by the agent.

Then, among the elastic members 33 and 71 included in the back belt member 30, all the waist elastic members 33a to 33i and the protruding region elastic members 71a to 71c that overlap the absorbent main body 10 in the thickness direction are the back joint regions. It is preferable that it overlaps with 62 in the thickness direction. By doing so, it is possible to prevent the back belt member 30 from twisting due to local contraction, and to firmly cover the waist and hips of the wearer.

In addition, the lateral lengths L6 and L7 of the lower portion 62A of the back side joining region 62 that overlaps the protruding region elastic members 71a to 71c in the thickness direction overlap with the waistline elastic members 33a to 33i in the thickness direction. It is preferably shorter than the lateral length L8 of the upper portion 62B of the side joining region 62 (L6, L7<L8).

Furthermore, of the protruding region elastic members 71a to 71c, the lateral length L6 of the portion of the back side joining region 62 that overlaps the lower elastic members 71b and 71c in the thickness direction is the same as the upper protruding region elastic member 71a. It is preferable that it is shorter than the lateral length L7 of the region of the back side joining region 62 that overlaps in the thickness direction (L6<L7). Further, it is preferable that the lower portion 62A of the back side joining region 62 does not intersect with the outline of the absorbent core 41, that is, it does not project outward in the lateral direction from the absorbent core 41.

By doing so, in the diaper 1 of the second embodiment, the back side belt member 30 is large, but the back side joint region 62 can be made as small as possible, and the back side belt member 30 and the absorbent main body 10 are not joined to each other. Can be made bigger. Therefore, the absorptive main body 10 is less likely to be affected by the contraction of the back side belt member 30, wrinkles of the absorptive main body 10 can be suppressed, and excrement leakage can be suppressed. Further, even if the lower end of the back belt member 30 is turned over, the comfort on the wearing is small, so that a problem occurs even if the lateral length of the portion below the back joint region 62 is shortened. hard. In other words, even if the lower end of the back belt member 30 is turned upside down, the lateral length of the portion above the back joint region 62 is long, and the portion above the back belt member 30 is located above the absorbent main body. Since it is firmly joined to 10, the separation of the back belt member 30 and the absorbent main body 10 can be prevented.

The absorbent core 41 shown in FIG. 8 has an hourglass shape, and the central portion in the longitudinal direction is constricted to the inner side in the width direction. In this case, both lateral sides of the absorbent main body 10 are likely to stand up on the skin side along the lateral sides of the absorbent core 41 due to the legs of the wearer being sandwiched. Therefore, as described above, it is preferable that the back-side joining region 62 be gradually reduced in length in the lateral direction toward the center side in the longitudinal direction as the absorbent core 41 is narrowed. By doing so, it is possible to prevent the protruding region 70 from entering the inside of the absorbent body 10 in the lateral direction by interlocking with the lateral both sides of the absorbent main body 10 which is erected by the wearer's legs being sandwiched, and the protruding region 70 has the buttocks. The state of covering is maintained.

Although the embodiments of the present invention have been described above, the above embodiments are for the purpose of facilitating the understanding of the present invention and not for limiting the interpretation of the present invention. Further, it is needless to say that the present invention can be modified or improved without departing from the gist thereof and that the present invention includes equivalents thereof.

1 diaper (pants type absorbent article), BH waistline opening, LH leg opening,
10 absorbent body, 11 top sheet, 12 back sheet, 13 exterior sheet,
14 elastic members for three-dimensional gathers, 15 three-dimensional gathers,
20 ventral belt member (belt portion), 21 skin side sheet, 22 non-skin side sheet,
23 waist elastic member, 24 cover sheet,
30 back belt member (belt part), 31 skin side sheet, 32 non-skin side sheet,
33 waistline elastic member (elastic member), 34 cover sheet,
40 absorbent body, 41 absorbent core, 42 core wrap sheet,
50 adhesives, 51 adhesives,
60 joining region, 61 ventral joining region, 61A first region,
61B second region, 62 dorsal side joining region, 63 non-joining region,
64 first application area, 65 second application area,
70 Projection Area, 71 Projection Area Elastic Member (Elastic Member)

Claims (9)

Having a longitudinal direction, a lateral direction and a thickness direction,
An absorbent main body that is folded in two in the longitudinal direction and in which the longitudinal direction is along the longitudinal direction,
A pants-type absorbent article having a pair of belt portions along the lateral direction,
The belt portion includes a skin-side sheet, a non-skin-side sheet, and an elastic member that is stretchable in the lateral direction and is bonded with an adhesive between the skin-side sheet and the non-skin-side sheet,
A non-skin side surface of the longitudinal end of the absorbent main body, and a pair of joint regions in which the skin side surface of the skin side sheet is joined,
The basis weight of the fibers of the skin side sheet is larger than the basis weight of the fibers of the non-skin side sheet,
The amount of the adhesive that joins the elastic member and the skin-side sheet per unit length is the amount of the adhesive that joins the elastic member and the non-skin-side sheet per unit length. Less than the pants-type absorbent article. The pants-type absorbent article according to claim 1,
At least one of the pair of joining regions connects the pair of first regions having a length in the lateral direction and the lateral end portions of the pair of first regions, and has a length in the longitudinal direction. And a second region of
A pant-type absorbent article characterized by having a non-bonding region where the absorbent main body and the skin-side sheet are not bonded, between the pair of first regions and between the pair of second regions. .. The pants-type absorbent article according to claim 2, wherein
The pants-type absorbent article, wherein the length in the vertical direction of the non-bonding region is longer than that of the lower first region of the pair of first regions. The pants-type absorbent article according to claim 2 or claim 3,
The pants-type absorbent article, wherein the upper first region of the pair of first regions is longer than the lower first region in the longitudinal direction. The pants-type absorbent article according to any one of claims 2 to 4,
Of the pair of joining regions, the joining region located on the wearer's ventral side has the non-joining region, and the joining region located on the wearer's back side does not have the non-joining region, Characteristic pants-type absorbent article. The pants-type absorbent article according to any one of claims 1 to 5,
In the belt portion, a plurality of the elastic members are arranged side by side in the vertical direction,
The pants-type absorbent article, wherein all the elastic members that overlap with the absorbent main body in the thickness direction overlap with the joining region in the thickness direction. The pants-type absorbent article according to any one of claims 1 to 6,
In the belt portion, a plurality of the elastic members are arranged side by side in the vertical direction,
The belt portion located on the wearer's back side has a projecting region that projects below the belt portion located on the wearer's ventral side,
A portion of the joining region that overlaps the elastic member arranged in the protruding region in the thickness direction has a lateral direction as compared with a portion of the joining region that overlaps the other elastic member in the thickness direction. The pants-type absorbent article is characterized by having a short length. The pants-type absorbent article according to claim 7,
Of the plurality of elastic members arranged in the projecting region, a portion of the joining region that overlaps the lower elastic member in the thickness direction has the joining portion that overlaps the upper elastic member in the thickness direction. The pants-type absorbent article is characterized in that the length in the lateral direction is shorter than that of the region portion. The pants-type absorbent article according to any one of claims 1 to 8,
The absorbent body has an absorber,
At least one of the site of the absorber located on the ventral side of the wearer and the site of the absorber located on the back side of the wearer, compared to the site of the absorber located in the crotch of the wearer. A pants-type absorbent article characterized by being thick.

Images