JP2007105298A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper which prevents direct contact of an excreted stool with a skin of a wearer and effectively prevents urine and the stool from remaining on a skin contact sheet. <P>SOLUTION: The disposable diaper 1 is equipped with an absorber 22, a top sheet 18, a back sheet 20, and the skin contact sheet (SCS) 24 placed at the upper part of the top sheet 18. The SCS 24 includes a stool passing opening part 26b and a urine passing opening part 26a at a part corresponding to a crotch part 4 and comprises a region (a SCS central region) 30 formed by extending a strip-shaped region (a region between opening parts) 29, which is located between two opening parts 26 and is stretched in the width direction, half the length between the opening parts to the front and back, a SCS abdominal side region 32 located nearer to the abdominal side than the SCS central region 30, and a SCS back side region 34 located on the back side. The stretching force in the width direction in the SCS central region 30 is greater than that of the width direction in the SCS abdominal side region 32 and the SCS back side region 34. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disposable diaper including a top sheet, a back sheet, and an absorbent body, and a skin contact sheet disposed on the top sheet.

  In recent years, as a diaper for infants or elderly people / handicapped persons, an absorbent body, a top sheet that is arranged so as to cover the upper surface of the absorbent body, and at least partially made of a liquid-permeable material, and a lower surface of the absorbent body Disposable diapers that are arranged so as to cover the back and are provided with a back sheet made of a liquid-impermeable material are widely used. By using the disposable diaper so that the surface of the top sheet is in contact with the skin of the wearer, the urine excreted by the wearer passes through the top sheet and is absorbed and held by the absorber. In addition, the back sheet excellent in leakage prevention prevents the excrement from leaking to the outside of the diaper.

  However, in the disposable diaper having the above-described configuration, although urine passes through the top sheet, most of the stool does not pass through the top sheet and remains on the top sheet. Since the stool remaining on the top sheet adheres to the wearer's crotch and buttocks, it requires cumbersome wiping work, which increases the burden of childcare and care, and also causes skin troubles for the wearer. It was. Such a problem becomes more apparent when the stool excreted by the wearer is soft stool.

  Therefore, a disposable diaper has been proposed in which another sheet body (hereinafter referred to as “skin contact sheet”) is arranged on the top of the top sheet (see, for example, Patent Documents 1 and 2). ). In these disposable diapers, an opening (stool passing opening) through which stool can pass is formed in the skin contact sheet, and the feces excreted by the wearer through the stool passing opening are on the top sheet. Configured to fall into.

Utility Model Registration No. 2559050 (paragraph 0010, FIG. 2) JP 2002-11044 A (paragraph 0020, FIG. 1)

  In the disposable diaper as described above, since the skin contact sheet first comes into contact with the skin of the wearer, the top sheet disposed at the lower part of the skin contact sheet is difficult to directly contact the wearer's skin. That is, the wearer's skin and the top sheet are separated from each other. In addition, a shielding layer called a skin contact sheet is interposed between the top sheet and the wearer's skin. Therefore, even if stool remains on the top sheet, it is possible to expect the effect of greatly reducing the chance that the stool and the skin of the wearer are in direct contact.

  However, a disposable diaper provided with a skin contact sheet having an opening formed therein, particularly a skin contact sheet having two openings (a stool passing opening and a urine passing opening) formed therein has stool and urine opened. There was a problem that it stayed on the skin contact sheet without passing through the part. This is because the skin contact sheet is not in close contact with the wearer's body due to the loosening between the two openings of the skin contact sheet, the position of the opening is not fixed, and the stool and urine are displaced from the opening. This is because it is excreted and falls onto the skin contact sheet. In other words, in terms of reliably passing urine and feces through the opening and dropping onto the top sheet, the urine and feces are not fully satisfactory and still have problems to be solved.

  Thus, at present, disposable diapers in which excreted stool is not easily in direct contact with the wearer's skin and urine and feces can reliably pass through the opening of the skin contact sheet and fall onto the top sheet. Is not disclosed, and such disposable diapers are eagerly desired. The present invention has been made in order to solve such a problem of the prior art, and the excreted stool is not easily in direct contact with the skin of the wearer, and urine and stool remain on the skin contact sheet. The present invention provides a disposable diaper that can effectively prevent this.

  The following disposable diapers are provided by the present invention.

[1] An absorber, disposed so as to cover the upper surface of the absorber, a top sheet made of at least a part of a liquid-permeable material, and disposed so as to cover the lower surface of the absorber, and impermeable to liquid A disposable diaper comprising a front body, a crotch part, and a back body, further comprising a skin contact sheet (SCS) disposed on an upper part of the top sheet, the skin contact The seat has a stool passage opening and a urine passage opening through which stool can pass at a portion corresponding to the crotch portion, and extends in the width direction sandwiched between the two openings. A region (SCS central region) obtained by extending a belt-like region (inter-opening region) back and forth by half the length between the openings, an SCS ventral region located on the ventral side of the SCS central region, and A disposable diaper (first diaper) having a width-direction stretch force in the SCS central region is larger than a width-direction stretch force in each of the SCS ventral region and the SCS back-side region. 1 embodiment).

[2] Disposable according to [1], wherein the stretching force in the width direction in the SCS central region is 1.1 to 5 times the stretching force in the width direction in each of the SCS ventral region and the SCS dorsal region. Diapers.

[3] An absorber, disposed so as to cover the upper surface of the absorber, and disposed so as to cover at least a part of the liquid-permeable material, and to cover the lower surface of the absorber. A disposable diaper comprising a front body, a crotch part, and a back body, further comprising a skin contact sheet (SCS) disposed on an upper part of the top sheet, the skin contact The seat has a stool passage opening and a urine passage opening through which stool can pass at a portion corresponding to the crotch portion, and extends in the width direction sandwiched between the two openings. A region (SCS central region) obtained by extending a belt-like region (inter-opening region) back and forth by half the length between the openings, an SCS ventral region located on the ventral side of the SCS central region, and It is composed of an SCS back region located on the back side, and an elastic elastic material is disposed on the skin contact sheet, and the sum of the components in the width direction (length) of the elastic elastic material in the SCS central region is the center of the SCS. The value divided by the length in the longitudinal direction of the region is larger than the value obtained by dividing the sum of the width direction components (lengths) in the SCS ventral region by the longitudinal length of the SCS ventral region, and the SCS dorsal side Disposable diapers larger than the value obtained by dividing the sum of the width direction components (lengths) in the region by the longitudinal length of the SCS dorsal region (second mode).

[4] Two elastic elastic materials that extend in the longitudinal direction across the opening in each of the SCS ventral region and the SCS dorsal region while the skin contact sheet intersects in the SCS central region. The disposable diaper according to [3].

  The disposable diaper according to the present invention (first and second aspects) effectively prevents excreted stool from coming into direct contact with the wearer's skin and prevents urine and feces from staying on the skin contact sheet. It is possible. That is, the disposable diaper of the present invention avoids problems when a skin contact sheet having two openings is installed, and has an excellent effect that the effects of forming the two openings can be reliably exhibited. It plays.

  Hereinafter, the best mode for carrying out the disposable diaper of the present invention (the first aspect and the second aspect) will be specifically described taking a two-piece type pant diaper as an example. However, the present invention broadly encompasses disposable diapers having the invention specific items, and is not limited to the following embodiments. In addition, about FIG. 3, for the convenience of drawing, it drawn in the form which left the leg elastic material from drawing.

  In addition, in this specification, when calling it "pants type diaper", like the disposable diaper 1 shown in FIGS. 1-3, the side edge parts (side edge part 2a, 6a) of the front body 2 and the back body 6 correspond. , The side edge portions 2b and 6b) are joined to form a joint portion 8, one waist opening portion 10 and a pair of leg opening portions 12a and 12b, which means a diaper configured in a pants shape in advance. Shall. And the “two-piece type” means an absorbent main body 14 that functions to absorb and retain the excrement of the wearer (absorption / holding function) and a function (wearing function) that encapsulates the wearer's body. It shall consist of the exterior member 16 to bear, and shall mean the diaper of the type by which the absorptive main body 14 was arrange | positioned inside the exterior member 16. FIG. As shown in FIG. 3, the absorbent main body 14 is a member that includes an absorbent body 22, a top sheet 18, and a back sheet 20 as constituent elements.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

(I: First aspect of the present invention)
[1] Configuration of the disposable diaper of the present invention:
The disposable diaper of this invention is arrange | positioned so that the upper surface of the absorber 22 and the absorber 22 may be coat | covered like the disposable diaper 1 shown in FIGS. 1-3, The top which at least one part consists of a liquid-permeable material A disposable diaper 1 including a front body 2, a crotch part 4, and a back body 6, which includes a sheet 18 and a back sheet 20 that is disposed so as to cover the lower surface of the absorber 22 and is made of a liquid-impermeable material. There is further provided a skin contact sheet (SCS) 24 disposed on top of the top sheet 18. 2 and 4, the skin contact sheet 24 has a urine passage opening 26a through which urine can pass and a stool passage opening 26b through which stool can pass through a portion corresponding to the crotch part 4, as shown in FIGS. Have Skin contact sheet 24 has a band-like region (inter-opening region) 29 extending in the width direction sandwiched between two openings 26 (26a, 26b) by a length that is half the length (distance) between the openings. Region (skin contact sheet central region (SCS central region)) 30 extended back and forth, skin contact sheet ventral region (SCS ventral region) located on the ventral side of the SCS central region, and skin contact positioned on the dorsal side It is composed of a seat back side region (SCS back side region), and the stretching force in the width direction in the SCS central region is larger than the stretching force in the width direction in each of the SCS ventral region and the SCS back side region. . Here, the portion corresponding to the crotch part of the skin contact sheet is preferably in close contact with the body so that urine does not flow through the body to the feces passage opening or the back side. Therefore, as a method for bringing the two openings into close contact with the body, a method is conceivable in which a force is applied so that the opening is lifted when the wearer wears the disposable diaper. This can be achieved by applying a tension, that is, a stretching force in the width direction from the left, right, front, back, or both between the openings. Therefore, when measuring the tension applied between the openings, a band-like region (inter-opening region) 29 extending in the width direction sandwiched between the two openings 26 (26a, 26b) is defined as the length between the openings ( A region (SCS central region) 30 extending back and forth by a half length of (distance) 29a is defined, and the stretching force in the width direction in the SCS central region is measured. The region where the inter-opening region 29 is extended in the front-rear direction means that the length in the width direction of the inter-opening region 29 is constant and the front body direction (front direction of the diaper) and the back body direction (front direction of the diaper). These are regions formed by extending the length in the longitudinal direction by a predetermined length. The longitudinal length L1 of the SCS central region 30 is twice the distance 29a between the openings, and the longitudinal central portion of the SCS central region 30 and the longitudinal central portion of the inter-opening region 29 coincide. The two openings 26 are formed so as to be aligned in the longitudinal direction of the skin contact sheet 24, and the urine passage opening 26a is formed on the abdomen side (front side) of the wearer when the diaper is worn on the wearer. The stool passing opening 26b is an opening located on the back side (rear side) of the wearer. The longitudinal direction is the front-rear direction when the disposable diaper is attached to the wearer, and the width direction is the left-right direction when the disposable diaper is attached to the wearer.

  As described above, the stretching force in the width direction in the SCS central region 30 of the skin contact sheet 24 is larger than the stretching force in the width direction in the SCS ventral region 32 and more than the stretching force in the width direction in the SCS dorsal region 34. Because of the large size, the SCS central region 30 located between the two openings 26 (the urine passage opening 26a and the stool passage opening 26b) of the skin contact sheet 24 when the disposable diaper 1 is attached to the wearer is a hammock The urine and feces are surely passed through the opening and falling onto the top sheet, effectively preventing the urine and feces from staying on the skin contact sheet. It becomes possible. Here, the term “stretching force” refers to a value (g / cm) obtained by dividing a force necessary for stretching when a skin contact sheet having a certain width is stretched in a direction perpendicular to the width by the width. . Here, the “certain width” may be the width in the width direction or the width in the longitudinal direction of the skin contact sheet. Accordingly, when the “certain width” is the width in the skin contact sheet width direction, the extending direction is the skin contact sheet longitudinal direction, and when the “certain width” is the skin contact sheet longitudinal direction, The extending direction is the skin contact sheet width direction. The length of the “certain width” is not particularly limited. If the region to be measured and the extending direction are specified, the length in the direction perpendicular to the extending direction in the region is obtained. “Skin contact sheet is fully extended” means that the skin contact sheet is stretched and then returned to the original shape (length) of the sheet material (non-woven fabric, etc.). Say. Therefore, a state where the sheet material is further extended so as to be larger than the original shape is not included. The stretching force is measured by a tensile tester, and the strength of the stretched skin contact sheet is measured. As the tensile tester, Toyo Seiki Seisakusho Co., Ltd., trade name: Strograph, or Orientec Co., Ltd., trade name: Tensilon can be used. And it is set as the strength before the sheet is stretched and the strength of the nonwoven fabric appears. When measuring the stretching force, a region to be measured is cut out to be a measurement sample, and stretched in a direction perpendicular to the “certain width” to measure the stretching force.

[1-1] Skin contact sheet:
The skin contact sheet is a member for separating the wearer's skin and the top sheet, and is disposed on the top of the top sheet. By providing this skin contact sheet, the skin contact sheet first comes into contact with the skin of the wearer, and therefore the top sheet disposed at the lower part of the skin contact sheet is difficult to directly contact the wearer's skin. That is, the wearer's skin and the top sheet are separated from each other. In addition, a shielding layer called a skin contact sheet is interposed between the top sheet and the wearer's skin. Therefore, even if the stool remains on the top sheet, it is possible to greatly reduce the chance that the stool and the skin of the wearer are in direct contact.

  As a material constituting the skin contact sheet, for example, a nonwoven fabric made of a resin such as polyethylene, polypropylene, or polyester, a mesh sheet, or a film can be used. Especially, it is preferable to use a nonwoven fabric in the point that the touch is favorable. These materials may be liquid permeable, liquid impermeable, or water repellent. However, a water repellent material (such as a water repellent nonwoven fabric) is preferable in that it can maintain a light touch (dryness) even when worn for a long time.

  Since the skin contact sheet 24 allows the urine and feces excreted by the wearer to pass therethrough, two openings 26 (a urine passage opening 26a and a stool passage opening 26b) are formed as shown in FIG. Yes. By adopting such a structure, the urine excreted by the wearer passes through the urine passage opening 26a, the stool passes through the stool passage opening 26b, and falls onto the top sheet, respectively. Opportunities for direct contact between urine and feces and the skin of the wearer can be greatly reduced.

  The shape of the opening 26 is not particularly limited as long as the opening 26 has a shape that can pass feces. That is, the "opening" through which stool can pass is crossed with a cross-shaped slit, three or more slits in addition to a so-called opening (hole) such as a circular opening, an elliptical opening, or a diamond opening. A slit such as a star-shaped slit is also included, and a combination of a hole and a slit may be used. Among these, an elliptical opening or a star-shaped slit whose longitudinal direction is the longitudinal direction (longitudinal direction) of the diaper is preferable. The oval opening has the advantage that the stool is easy to pass through the opening of the skin contact sheet, and the star-shaped slit has the stool once passing through the opening of the skin contact sheet and falling on the top sheet. There is an advantage that it is possible to effectively prevent the skin contact sheet from being exposed again and contaminating the wearer's buttocks. For example, the disposable diaper 1 shown in FIG. 2 includes a urine passage opening 26a and a stool passage opening 26b in the portion corresponding to the crotch part 4 of the skin contact sheet 24, and the longitudinal direction of the diaper is the major axis direction. Is an example in which an elliptical opening is formed. Both the urine passage opening 26 a and the stool passage opening 26 b are preferably located at the center in the width direction of the skin contact sheet 24. The urine passage opening 26a and the stool passage opening 26b are arranged in the longitudinal direction of each skin contact sheet 24, such that the urine passage opening 26a can pass urine, the stool passage opening. The position is not particularly limited as long as 26b can pass the stool. The size of the urine passage opening 26a is not particularly limited as long as it can pass urine, and the size of the stool passage opening 26b is not particularly limited as long as it can pass stool. . For example, in the case of an L size for infants (longitudinal length of about 420 mm), the longitudinal length of the skin contact sheet 24 is 50 in both the urine passage opening 26a and the stool passage opening 26b. ˜150 mm is preferable, and the width direction length is preferably 1 to 100 mm.

  As described above, in the present invention, the width direction stretch force (center region stretch force) of the skin contact sheet 24 in the SCS center region 30 is the width direction stretch force (ventral side region stretch force) in the SCS ventral region 32. ) And greater than the stretching force in the width direction in the SCS back region 34 (back region stretching force). And the stretching force in the width direction of the SCS central region is 1.1 to 5 times the stretching force in the width direction of the SCS ventral region and the stretching force in the width direction of the SCS dorsal region. It is preferable that it is 1.5 to 3 times. By setting the stretching force of the SCS central region in such a range, it is possible to further improve the adhesion with the wearer's body. Further, the stretching force in the width direction of the SCS central region is preferably 2 to 20 (g / cm), and more preferably 5 to 10 (g / cm). By setting it as such a range, a skin contact sheet comes to contact | adhere moderately to a wearer.

  When measuring the stretching force of each of the SCS central region 30, the SCS ventral region 32, and the SCS dorsal region 34, the region to be measured is cut out from the skin contact sheet 24 to obtain a measurement sample, Stretching force (width direction) is measured by grasping both ends and extending in the width direction. Since the skin contact sheet has an opening, none of the samples are rectangular, but each end may be grasped and stretched (over the entire length of each end).

  In this embodiment, in order to form the skin contact sheet 24 in this way, as shown in FIG. 2, the elastic elastic material is arranged at a specific position. That is, in the present embodiment, in order to increase the stretching force of the SCS central region, the skin contact sheet 24 intersects with the SCS central region 30 and is opened in each of the SCS ventral region 32 and the SCS back region 34. Two stretchable elastic materials (opening stretchable materials) 28 extending in the longitudinal direction across the portion 26 are arranged. That is, in the SCS ventral region 32, one opening elastic member 28a extends in the longitudinal direction between the urine passage opening 26a and the SCS side edge 36a (one side edge of the skin contact sheet 24). In the SCS central region 30, between the urine passage opening 26a and the stool passage opening 26b from the SCS side edge 36a side to the SCS side edge 36b (the other side of the skin contact sheet 24). The SCS dorsal region 34 is disposed so as to extend in the longitudinal direction between the fecal passage opening 26b and the SCS side edge 36b. The other opening elastic member 28b has a center line extending in the longitudinal direction of the skin contact sheet 24 (a line extending in the longitudinal direction at the center in the width direction) (not shown) as an axis of symmetry, and the opening elastic member 28a. Are arranged in line-symmetric positions. In the present embodiment, each of the opening stretchable material 28a and the opening stretchable material 28b is one, but each may have two or more.

  FIG. 4 is a plan view schematically showing a skin contact sheet used in the disposable diaper of the present embodiment. As described above, the skin contact sheet used in the present embodiment intersects the two opening elastic members 28a and 28b in the SCS central region 30, that is, at the intersection P1 between the two openings 26a and 26b. By doing so, the stretching force in the width direction of the SCS central region 30 is increased. This is because the width direction component (length) of the opening stretchable members 28a and 28b in the SCS central region 30 is increased by intersecting the opening stretchable members 28a and 28b in the SCS central region 30, thereby It is the one that increases the elasticity. By forming in this way, it becomes possible to make the width direction stretching force of the SCS central region 30 larger than both the width direction stretching force of the SCS ventral region 32 and the width direction stretching force of the SCS back side region 34. .

  The disposable diaper equipped with a skin contact sheet makes it easier for stool and urine to pass through its opening as the skin contact sheet comes into close contact with the wearer's body, reducing the chance of contact between the stool and the wearer's skin. It becomes easy to demonstrate the effect. However, the better the adhesion between the skin contact sheet and the wearer's body, the more likely the skin contact sheet and the wearer's skin become moistened by sweat or the like. In order to eliminate such a situation, the skin contact sheet used in the disposable diaper of the present invention is positioned on the outer side in the longitudinal direction of each of the two openings 26 of the skin contact sheet 24 as shown in FIG. It is preferable that the area | region (opening part outer side area | region) 51 (51a, 51b) is an area | region which does not have the expansion-contraction force of the width direction and a longitudinal direction. As described above, the skin contact sheet 24 has both the opening portion outer regions 51 (51a, 51b) as regions that do not have the stretching force in the width direction and the longitudinal direction. The contact sheet does not adhere to the wearer's skin, it is possible to improve the air permeability, and skin trouble can be suppressed. In this case, in order to maintain the adhesion of the skin contact sheet to the body, at least the SCS central region needs to have a stretching force in the width direction.

  As shown in FIGS. 2 and 4, the two opening outer regions 51a and 51b are regions that do not have the stretching force in the longitudinal direction and the width direction, and the SCS central region 30 is a region that has the stretching force in the width direction. Therefore, the opening stretchable material is not disposed in the two opening outer regions 51a and 51b, and the opening stretchable material 28 (28a, 28b) is disposed in the SCS central region 30 so as to have a width direction component. It is preferable to do. In the SCS central region 30 of the skin contact sheet 24, the opening stretchable material 28 (28a, 28b) extends along the urine passage opening 26a and the stool passage opening 26b, along the SCS ventral region 32 and the SCS dorsal region 34. It is preferable to arrange | position so that it may extend in a longitudinal direction. The opening elastic member 28 forms an intersection P1 between the urine passage opening 26a and the stool passage opening 26b. Thus, although it is preferable to use a linear elastic elastic material as the opening elastic material, the sheet material itself constituting the skin contact sheet may have a structure having elasticity.

  In the present invention, two regions (SCS side edge regions) 50 (50a, 50b) extending in the longitudinal direction along the widthwise both ends of the skin contact sheet 24 shown in FIG. It is preferable that the region has no directional stretching force. Thereby, air permeability can be further improved, and skin trouble can be further suppressed. And the width direction length of the SCS side edge area | region 50 which does not have a stretching force is 2.5-25% of the width | variety of the whole skin contact sheet (width direction length of a skin contact sheet) per one side. It is preferably 5 to 10%, more preferably. That is, when the both side edges are combined, it is preferably 5 to 50%, more preferably 10 to 20%. By setting the SCS side edge region in such a range, it is possible to better maintain the balance between the adhesion with the wearer's body and the prevention of skin trouble.

  As the arrangement pattern of the opening stretchable material, the above pattern is preferable, but the width direction stretch force of the SCS central region is more than the width direction stretch force of the SCS ventral region and the width direction stretch force of the SCS dorsal region. There is no particular limitation as long as it can be increased. For example, even if a region 31 where no opening stretchable material exists is formed between two openings (a urine passage opening 26a and a stool passage opening 26b) as in the skin contact sheet 24 shown in FIG. Good. In the region 31 where no opening stretchable material exists, the four openable stretchable materials are not connected between the two openings (the urine passing opening 26a and the stool passing opening 26b), respectively. Alternatively, it may be formed by arranging two opening stretchable members as shown in FIG. 4 and then cutting and snapping back at the intersection P1. Thereby, it becomes possible to eliminate skin troubles due to rubbing of the crotch portion when the wearer wears it.

  Further, for example, like the skin contact sheet 24 shown in FIG. 6, two opening stretchable members 28 (28g, 28h) extending in the width direction are formed on the skin contact sheet 24 shown in FIG. One may be provided on each side in the width direction of the region 31 that does not have the opening stretchable material. The number of opening stretchable members is not limited to one, but may be any number. The opening stretchable material is preferably disposed along the center line between the two openings (the urine passage opening 26a and the stool passage opening 26b).

  Further, for example, like the skin contact sheet 24 shown in FIG. 7, the two opening elastic members 28 (28 i, 28 j) are not intersected with the two opening elastic members 28 (28 i, 28 j), The two openings (the urine passage opening 26a and the stool passage opening 26b) may be disposed so as to be sandwiched from both side edge sides. At this time, in order to increase the expansion / contraction force in the width direction of the SCS central region 30, the two opening elastic members 28 (28 i, 28 j) are respectively arranged in the width direction central portion side (direction approaching each other) in the SCS central region 30. It is preferable to dispose it. Also in this case, two opening stretchable members 28 (28g, 28h) extending in the width direction may be disposed at positions on both outer sides in the width direction of the curved portion. Also in this case, the number of opening stretchable members is not limited to one, and may be any number.

  Moreover, since it arrange | positions so that an opening part elastic material may extend in a diaper longitudinal direction as mentioned above, since an opening elastic material is continuously arrange | positioned, there exists an advantage that a continuous manufacture of a disposable diaper becomes easy and preferable. .

  If the opening stretchable material is arranged as described above, tension is applied to the skin contact sheet, so that the entire skin contact sheet can be firm. Therefore, it is possible to prevent the skin contact sheet from falling to the top sheet side, and there is an advantage that the skin contact sheet can easily come into contact with the wearer's skin. Further, when the opening stretchable material is disposed, the skin contact sheet is contracted, and the top sheet, the absorbent body, and the back sheet can act to bend downward (exterior member side). Therefore, the skin contact sheet can be kept floating from the top sheet, and the skin contact sheet and the top sheet can be reliably separated from each other.

  As the opening stretchable material, stretchable materials that have been used in conventional disposable diapers can be suitably used. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc. in addition to thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.). .

  Since the opening stretchable material is disposed along the opening, a contraction force in the longitudinal direction is generated around the opening. As the contraction force in the longitudinal direction, in the SCS dorsal region or the SCS ventral region, the contraction force in the longitudinal direction generated by the opening stretchable material disposed between the opening and the one side edge is 10 to 100. (Gf) is preferable, and 20 to 80 (gf) is more preferable. For example, in FIG. 4, in the SCS dorsal region 34, the longitudinal stretching force by the opening stretchable material 28 a is preferably in the above range, and the longitudinal stretching force by the opening stretchable material 28 b is in the above range. It is preferable. In this case, each opening stretchable material does not include a portion located in the SCS central region 30. Furthermore, it is preferable that the stretching force in the longitudinal direction in the predetermined region (the SCS dorsal region or the SCS ventral region) by the opening stretchable members 28a and 28b is within the above range. By setting it as such a range, it becomes possible to give moderate elastic force to a skin contact sheet. For example, when natural rubber is used, one having a thickness of 0.2 to 0.25 mm and a width of 1.6 to 2.4 mm is 150 to 300% (a natural length of 1.5 to 1.5%). (3 times) is preferably stretched and fixed. When urethane rubber is used, it is preferable to use 2 to 3 thread rubbers having a thickness of about 620 Dtex and extend them to 200 to 300% and arrange them in parallel.

  The opening stretchable material as described above is fixed to the skin contact sheet by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

  The opening stretchable material is preferably fixed in the stretched state, that is, in the stretched state, in order to exert a sufficient stretch force on the skin contact sheet. For example, when the opening stretchable material is natural rubber or synthetic rubber, it is preferably fixed in a stretched state of 100 to 400%, and more preferably fixed in a stretched state of 200 to 300%. When the material is natural rubber, it is preferably stretched and fixed to 150 to 300% as described above. By fixing in the stretched state in such a range, it is possible to apply a sufficient stretching force to the skin contact sheet, particularly the SCS central region, and to prevent the SCS central region from being reduced more than necessary. It is also possible to increase the expansion / contraction force in the SCS central region by increasing the elongation rate of the opening stretchable material disposed in the SCS central region as compared with the SCS ventral region and the SCS back region. For example, the stretch rate of the opening stretchable material disposed in the SCS central region can be 250 to 300%, and the stretch rate in the SCS ventral region and the SCS dorsal region can be 200 to 250%.

  The arrangement method of the opening stretchable material is not particularly limited. For example, as in the disposable diaper 1 shown in FIGS. 1 to 3, the skin contact sheet 24 is bonded to two sheet materials (upper sheet 24 a and liner sheet 24 b). It is preferable to arrange them so that the opening elastic members 28a and 28b are sandwiched between the upper sheet 24a and the liner sheet 24b. Employing such an arrangement method is preferable because it can impart stretching force to the skin contact sheet with the minimum necessary stretching material.

  In the disposable diaper according to the present embodiment, a separation wall that divides the space between the skin contact sheet and the top sheet into a space communicating with the urine passage opening and a space communicating with the stool passage opening. It is preferable to provide it. When urine and feces are mixed, ammonia is generated. This ammonia makes the environment alkaline, and the enzymes in the stool are strongly activated in an alkaline atmosphere. The weakened areas of the skin are inflamed by this enzyme and ammonia, causing diaper rash. Has been reported to occur (Kazuya Yamamoto, Dermatology 30, 949-956 (1998)). By providing the separation wall as described above, it becomes possible to absorb and hold the urine excreted by the wearer in a state separated from the stool, so that the urine and the stool are hardly mixed, and diaper rash is effectively prevented. can do.

  As a method for fixing the skin contact sheet, (1) a method for fixing the skin contact sheet 24 on the surface of the top sheet 18 (or back sheet 20), and (2) when a three-dimensional gather is provided, A method of fixing the skin contact sheet 24 to the surface can be exemplified.

[1-2] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  The absorber needs to be interposed at least in part between the top sheet and the back sheet. Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, the flap part in which the absorber is not interposed is formed between the top sheet and the back sheet at the peripheral part of the absorber.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned.

[1-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the upper surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the lower surface side needs to absorb the wearer's urine.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment.

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, in the case of a tape-type diaper, a top sheet (center sheet) made of a liquid-permeable material is arranged at the center of the diaper, and a top sheet (side sheet) made of a water-repellent material at the side flap portion of the diaper. A form of arranging is often used.

[1-4] Backsheet:
A back seat | sheet is a sheet | seat arrange | positioned so that the lower surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[1-5] Absorbent body:
In the two-piece type pants-type diaper, the top sheet, the back sheet, and the absorbent body are configured as one member called an “absorbent body” that is responsible for absorption and holding functions, and an exterior member that is manufactured separately. A disposable diaper is formed by joining. Like the sanitary napkin, this absorbent main body has a top sheet on the upper surface side of the absorbent body and a back sheet on the lower surface side. The absorbent body is interposed between the top sheet and the back sheet. It has a structured. For example, the disposable diaper 1 shown in FIG. 1 to FIG. 3 includes the top sheet 18 and the back sheet by sandwiching the absorbent body 22 between the top sheet 18 and the back sheet 20 and sealing the periphery of the absorbent body 22. 20 is an example in which the absorbent main body 14 having a structure in which an absorber 22 is interposed between the absorbent body 14 and the absorbent body 14 is configured.

  An absorptive main body is comprised by the size which covers at least the crotch part of a diaper. However, in order to ensure the effect of preventing leakage, it is preferable to have a size that covers not only the crotch part but also a part of the front body and the back body. The absorptive main body can be fixed to the exterior member using, for example, a hot melt adhesive.

[1-6] Exterior member:
The exterior member is a member having a mounting function for encapsulating the wearer's body, and specifically, is a sheet-like member that forms the front body, the crotch portion, and the back body.

  In the two-piece type pants-type diaper, the absorbent main body serves exclusively for the absorption / holding function of absorbing and holding the excrement of the wearer, so a liquid-impermeable material as a material constituting the exterior member There is no need to use. Examples of the material constituting the exterior member include a nonwoven fabric composed of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins.

  And in order to fix an exterior member in the state which pinched | interposed the elastic material etc. around the leg, it is often configured by bonding two or more nonwoven fabrics together. For example, in the disposable diaper 1 shown in FIGS. 1 to 3, the exterior member 16 is composed of two non-woven fabrics, and the leg elastic member 40, the waist elastic member 42, and the belly elastic member between the two non-woven fabrics. This is an example in which 44 is sandwiched and fixed.

[1-7] Various elastic materials:
In a pants-type disposable diaper, it is common to arrange an elastic material around the legs, arrange an elastic material around the waist, and more preferably arrange an elastic material around the abdomen.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  An abdominal circumference elastic material is an elastic material arrange | positioned in the part (namely, part equivalent to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a highly elastic tammy gather around the abdomen of the wearer. This Tammy Gather, together with West Gather, can make the diaper fit and anti-slip effect even better.

  In the disposable diaper 1 shown in FIGS. 1 to 3, a plurality of leg-holes elastic members 40 are arranged on the periphery of the leg-hole openings 12 a and 12 b, and the waist-hole opening is provided on the periphery of the waist-hole opening 10. A plurality of waist elastic members 42 are disposed so as to surround 10, and a portion between the waist opening 10 and the leg openings 12 a and 12 b (that is, a portion corresponding to the wearer's abdomen). This is an example in which a plurality of belly stretchable members 44 are arranged so as to surround the wearer's belly.

  About these elastic materials, the structure similar to the opening part elastic material already described is employable. Then, after considering the degree of gather contraction and the like, the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

[1-8] Solid gathering:
In order to prevent side leakage of urine excreted by the wearer, a three-dimensional gather may be provided. The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming a three-dimensional gather, urine is excreted on the skin contact sheet, and even if the urine spreads through the skin contact sheet, the three-dimensional gather becomes a breakwater, and from the opening around the leg of the diaper, etc. Leakage (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, it is possible to suitably use a material in which a stretchable material (a three-dimensional gathered stretchable material) is arranged on a part of the sheet material, and a gather is formed on the sheet material by the three-dimensional gathered stretchable material.

[2] Manufacturing method:
Hereinafter, an example of the method of manufacturing the disposable diaper of the present invention will be described with reference to an example of manufacturing the disposable diaper 1 (two-piece type pants-type diaper) shown in FIGS.

[2-1] Production of absorbent main body:
An absorber 22 wrapped in a hydrophilic sheet is disposed on the upper surface of the back sheet 20, and a top sheet 18 is disposed on the upper surface. Next, the absorbent main body 14 is obtained by sealing the periphery of the absorbent body 22 so as to be sandwiched between the top sheet 18 and the back sheet 20.

[2-2] Production of skin contact sheet:
The upper sheet 24a is bonded to the upper surface of the liner sheet 24b while arranging the two opening stretchable members 28a and 28b in a predetermined pattern. The upper sheet 24a is configured to cover only the center portion of the liner sheet 24b and to expose both side edges of the liner sheet 24b. As shown in FIG. 4, the two opening stretchable members 28a and 28b intersect at a point between the urine passage opening 26a and the stool passage opening 26b, which will be formed later, and the urine passage opening. It arrange | positions in the pattern which surrounds a part of periphery of the part 26a and the stool passage opening 26b.

  Next, the urine passage opening 26a and the stool passage opening 26b are formed in the bonded liner sheet 24b and upper sheet 24a. By doing so, the two opening elastic members 28a and 28b intersect at a point between the urine passage opening 26a and the stool passage opening 26b, and the urine passage opening 26a and the stool passage opening 26b. A skin contact sheet 24 having a two-layer structure arranged in a pattern surrounding a part of the periphery of the film is obtained.

[2-3] Attaching the skin contact sheet to the absorbent main body:
A skin contact sheet 24 is bonded to the surface of the top sheet 18 constituting the absorbent main body 14.

[2-4] Production of exterior member:
First, two nonwoven fabrics to be the exterior member 16 are prepared, and a waist elastic member 42, an abdominal elastic member 44, and a leg elastic member 40 are disposed on and bonded to the upper surface of one of the nonwoven fabrics. And by laminating and fixing another nonwoven fabric on the upper surface, the waist elastic member 42, the belly elastic member 44 and the leg elastic member 40 are interposed between the two nonwoven materials. The exterior member 16 is obtained.

[2-5] Manufacture of disposable diapers:
The absorbent main body 14 is disposed and fixed near the crotch part of the exterior member 16. Next, the absorbent body 14 is turned inside, and the front body 2 and the back body 6 are folded in two so that the front body 2 and the back body 6 are matched, and the front body 2 and the back body 6 are joined by means such as heat sealing to form the joint 8. By doing, the disposable diaper 1 shown in FIGS. 1-3 can be manufactured.

  The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material or stretchable material from a roller, it becomes possible to continuously manufacture disposable diapers, which contributes to an improvement in productivity.

[3] Application target of the present invention:
The application object of the disposable diaper of this invention is not restricted to the said 2 piece type underpants type diaper, For example, it can apply also to a 1 piece type underpants type diaper and a tape type diaper. That is, also in these disposable diapers, by disposing a skin contact sheet in which two openings are formed and a predetermined opening stretchable material is disposed above the surface of the top sheet, the disposable diaper of the present invention is arranged. You can enjoy the effects of

  “One-piece type” includes a top sheet, a back sheet, and an absorber as in the case of the two-piece type. However, the absorber that performs absorption and holding functions is interposed between the top sheet and the back sheet. This means a diaper of a type that is (built-in) and configured integrally with a top sheet and / or a back sheet that has a mounting function.

  The “tape-type diaper” includes a top sheet, a back sheet, an absorber interposed in at least a part between the two sheets, and a tape fastener for wearing. It shall mean a disposable diaper that can fix the back and back parts to each other. “Tape-type diapers” also have “1-piece type” and “2-piece type” as in pants-type diapers, but the disposable diaper of the present invention is applicable to any type of tape-type diaper.

(II: Second aspect of the present invention)
Next, an embodiment of the second aspect of the present invention will be described using FIGS. 1 to 7 in the same manner as in the description of the first aspect.

Configuration of the disposable diaper of the present invention:
The disposable diaper of this invention is arrange | positioned so that the upper surface of the absorber 22 and the absorber 22 may be coat | covered like the disposable diaper 1 shown in FIGS. 1-3 like the said 1st invention. The front body 2 includes a top sheet 18 made of a liquid-permeable material, and a back sheet 20 made of a liquid-impermeable material so as to cover the lower surface of the absorber 22, and includes a front body 2, a crotch 4, and a back body. 6 is a disposable diaper 1 comprising a skin contact sheet (SCS) 24 disposed on the top sheet 18. 2 and 4, the skin contact sheet 24 has a urine passage opening 26a through which urine can pass and a stool passage opening 26b through which stool can pass through a portion corresponding to the crotch part 4, as shown in FIGS. Have The skin contact sheet 24 has a band-like region (inter-opening region) 29 extending in the width direction sandwiched between two openings 26 (26a, 26b), which is half the length (distance) 29a between the openings. A region (SCS central region) 30 extending back and forth, an SCS ventral region 32 positioned on the ventral side of the SCS central region 30, and an SCS dorsal region 34 positioned on the dorsal side. The skin contact sheet 24 is provided with a stretchable elastic material (opening stretchable material) 28. In the second aspect, the widthwise component (length) of the stretchable elastic material 28 in the SCS central region 30 is provided. Is a value obtained by dividing the sum of the width direction components (lengths) in the SCS ventral region 32 by the longitudinal length L2 of the SCS ventral region 32. It is larger and larger than the value obtained by dividing the sum of the width direction components (lengths) in the SCS dorsal region 34 by the longitudinal length L3 of the SCS dorsal region. Here, the two openings 26 are formed so as to be aligned in the longitudinal direction of the skin contact sheet 24, and the urine passage opening 26a is provided on the stomach side (front side) of the wearer when the diaper is worn on the wearer. The stool passing opening 26b is an opening located on the wearer's back side (rear side).

  Thus, the value obtained by dividing the sum of the width direction components (lengths) of the stretchable elastic material in the SCS central region 30 by the longitudinal length L1 of the SCS central region 30 is the width of the stretchable elastic material in the SCS ventral region 32. The sum of the directional components (lengths) is greater than the value obtained by dividing the total length of the SCS ventral region 32 by the longitudinal length L2, and the sum of the widthwise components (lengths) of the stretchable elastic material in the SCS dorsal region 34 is SCS. Since it is larger than the value divided by the longitudinal length L3 of the dorsal region, the stretching force in the width direction in the SCS central region is larger than the stretching force in the width direction in each of the SCS ventral region and the SCS dorsal region. It becomes possible to do. Thereby, when the disposable diaper 1 is attached to the wearer, the SCS central region 30 located between the two openings 26 (the urine passage opening 26a and the stool passage opening 26b) of the skin contact sheet 24 is loosened. Since it adheres closely to the wearer without urine or stool, the urine or stool can be reliably prevented from passing over the opening and falling onto the top sheet, and the urine or stool remaining on the skin contact sheet.

Skin contact sheet:
In the second mode, as shown in FIG. 4, two opening stretchable members 28a, 28b are crossed at the SCS central region 30, that is, at the intersection P1 between the two openings 26a, 26b. , The width direction component of the SCS central region 30 is increased. The width direction component (length) H1 of the opening stretchable material 28a in the SCS central region 30 is determined from the intersection P2 between the boundary line between the SCS central region 30 and the SCS backside region 34 and the opening stretchable material 28a. This is the distance in the width direction to the intersection P3 between the boundary line between the central region 30 and the SCS ventral region 32 and the opening stretchable material 28a. Similarly, the width direction component (length) of the opening stretchable material 28b in the SCS central region 30 is the distance in the width direction between the intersections of the opening stretchable material 28b and the two boundary lines. Accordingly, the sum of the width direction components (lengths) of the two opening stretchable members 28a and 28b in the SCS central region 30 is referred to as the width direction component (length) of the opening stretchable member 28a in the SCS central region 30. ) The total length (total center region width) of H1 and the width direction component (length) in the SCS center region 30 of the opening stretchable member 28b.

  4, the width direction component (length) H2 in the SCS ventral region 32 of the opening stretchable member 28a is the boundary line between the SCS central region 30 and the SCS ventral region 32, and the opening. The distance in the width direction from the intersection P3 with the elastic material 28a to the point P4 closest to the SCS side edge 36a of the opening elastic material 28a in the SCS ventral region 32. And similarly about the width direction component (length) in the SCS ventral region 32 of the opening elastic member 28b, the boundary line between the SCS central region 30 and the SCS ventral region 32 of the opening elastic member 28b, The distance in the width direction from the intersection with the opening stretchable material 28b to the point closest to the SCS side edge 36b of the opening stretchable material 28b in the SCS ventral region 32. Accordingly, when the sum of the width direction components (lengths) of the two opening stretchable members 28a and 28b in the SCS ventral region 32 is referred to as the width direction component (in the SCS ventral region 32 of the opening stretchable member 28a) ( Length) Total length (total ventral region width) of H2 and the width direction component (length) in the SCS ventral region 32 of the opening stretchable member 28b.

  In addition, when the sum of the width direction components (lengths) of the two opening elastic members 28a and 28b in the SCS dorsal region 34 is the same as in the SCS ventral region 32, the opening elastic material The total length (back side region width total) of the width direction component (length) H3 in the SCS back side region 34 of 28a and the width direction component (length) in the SCS back side region 34 of the opening stretchable material 28b. ).

  And in the disposable diaper of a 2nd aspect, the value which remove | divided the said center area width total of the skin contact sheet 24 by the longitudinal direction length L1 of the SCS center area | region 30 is the said ventral area width total. It is larger than the value divided by the longitudinal length L2 of 32 and larger than the value obtained by dividing the total dorsal region width by the longitudinal length L3 of the SCS dorsal region 34. By forming in this way, it is possible to make the width direction stretching force of the SCS central region 30 larger than both the width direction stretching force of the SCS ventral region 32 and the width direction stretching force of the SCS dorsal region 34. Thus, the SCS central region 30 can be brought into close contact with the wearer without loosening.

  In the disposable diaper of the second aspect, the arrangement pattern of the opening stretchable member of the skin contact sheet is preferably the above pattern, but the value obtained by dividing the total central region width by the longitudinal length L1 of the SCS central region 30 is as follows. A value obtained by dividing the total ventral region width by the longitudinal length L2 of the SCS ventral region 32 and a value obtained by dividing the total dorsal region width by the longitudinal length L3 of the SCS dorsal region 34. There is no particular limitation as long as it is larger. For example, as shown in FIG. 5, a region 31 where no opening stretchable material is present may be formed between two openings (the urine passage opening 26 a and the stool passage opening 26 b). The region 31 where the opening stretchable material does not exist is a region arranged so as to extend in a band shape between the two openings, and the width direction length is the maximum width of the opening (the maximum width direction length). Value) is preferably 10 to 100%, and at least the central region is preferably a non-stretchable region. In the region 31 where no opening stretchable material exists, the four openable stretchable materials are not connected between the two openings (the urine passing opening 26a and the stool passing opening 26b), respectively. Alternatively, it may be formed by arranging two opening stretchable members as shown in FIG. 4 and then cutting and snapping back at the intersection P1. In this case, the sum of the width direction components in the SCS center region is the width direction component (length) H11 in the SCS center region 30 of the opening stretchable material 28c, and the width direction component (length) in the SCS center region 30 of the opening stretchable material 28d. H) The sum of H12, the width direction component (length) in the SCS central region 30 of the opening stretchable material 28e, and the width direction component (length) in the SCS central region 30 of the opening stretchable material 28f.

  Further, for example, as shown in FIG. 6, two opening stretchable members 28 (28g, 28h) extending in the width direction are replaced with the opening stretchable material formed on the skin contact sheet 24 shown in FIG. You may arrange | position in the width direction both sides of the area | region which does not have. The opening stretchable material is preferably disposed along the center line between the two openings (the urine passage opening 26a and the stool passage opening 26b).

  Further, for example, as shown in FIG. 7, two opening portions (28i, 28j) extend in the longitudinal direction without intersecting the two opening portion expansion members, and two openings (urine passage) The opening 26a for stool and the opening 26b for passing the stool may be disposed so as to be sandwiched from both side edges. At this time, in order to increase the width direction component of the SCS central region 30, the two opening stretchable members may be arranged in the SCS central region 30 so as to be curved toward the width direction central portion side (direction approaching each other). preferable. In this case as well, two opening stretchable members 28 (28g, 28h) extending in the width direction may be disposed at positions on both outer sides in the width direction of the curved portion.

  It is preferable that the other structure of the skin contact sheet in the disposable diaper of a 2nd aspect is the same as that of the structure of the skin contact sheet in a 1st aspect mentioned above. Thereby, a similar effect can be obtained.

  In the disposable diaper of a 2nd aspect, it is preferable that it is the same as that of each structure in the disposable diaper of a 1st aspect mentioned above about structures, such as top sheets other than the skin contact sheet mentioned above, a back sheet | seat. Thereby, a similar effect can be obtained. Moreover, it is preferable that the manufacturing method of the disposable diaper of a 2nd aspect is the same as the manufacturing method of the disposable diaper of a 1st aspect mentioned above.

  The disposable diaper of the present invention can be suitably used as a diaper for infants or for adults such as elderly people and persons with disabilities who need care. The disposable diaper of the present invention can be used particularly suitably as a disposable diaper for infants because the excreted stool is not easily brought into direct contact with the wearer's skin, and the skin is weak and skin troubles are frequent.

It is a schematic perspective view which shows one Embodiment of the disposable diaper of this invention, and is a schematic perspective view which shows the state seen from the front of a diaper. It is a top view which shows one Embodiment of the disposable diaper of this invention, is a top view which expand | deploys the disposable diaper shown in FIG. 1, and shows the state seen from the absorptive main body side of the diaper. It is a schematic sectional drawing which shows one Embodiment of the disposable diaper of this invention, and is a schematic sectional drawing which shows the cross section which cut | disconnected the disposable diaper shown in FIG. 2 along the X-X 'line. It is a schematic plan view which shows the skin contact sheet used for one Embodiment of the disposable diaper of this invention. It is a schematic plan view which shows the skin contact sheet used for other embodiment of the disposable diaper of this invention. It is a schematic plan view which shows the skin contact sheet used for other embodiment of the disposable diaper of this invention. It is a schematic plan view which shows the skin contact sheet used for other embodiment of the disposable diaper of this invention.

Explanation of symbols

1: disposable diaper, 2: front body, 2a, 2b: side edge, 4: crotch, 6: back body, 6a, 6b: side edge, 8: joint, 10: waist opening, 12, 12a, 12b: Leg opening, 14: Absorbent body, 16: Exterior member, 18: Top sheet, 20: Back sheet, 22: Absorber, 24: Skin contact sheet, 24a: Upper sheet, 24b: Liner sheet , 26: opening, 26a: urine passing opening, 26b: stool passing opening, 28, 28a, 28b, 28c, 28d, 28e, 28f, 28g, 28h, 28i, 28j: opening stretchable material, 29 : Area between openings, 29a: distance between openings, 30: SCS center area, 31: area where there is no opening elastic material, 32: SCS ventral area, 34: SCS dorsal area, 36a, 36b: SCS Edge part, 40: Elastic material around leg, 42: Elastic material around waist, 44: Elastic material around waist, H1, H2, H3, H11, H12: Width direction component of elastic material, P1, P2, P3: Intersection point, P4: point closest to the SCS side edge of the elastic elastic material, L1, L2, L3: length in the longitudinal direction.

Claims (4)

An absorber, a top sheet that is arranged so as to cover the upper surface of the absorber, and at least a part that is made of a liquid-permeable material, and a surface that covers the lower surface of the absorber, and is made of a liquid-impermeable material A disposable diaper comprising a front body, a crotch part and a back body,
A skin contact sheet (SCS) disposed on the top sheet;
The skin contact sheet has a stool passage opening and a urine passage opening through which urine can pass in a portion corresponding to the crotch,
A region (SCS central region) obtained by extending a band-shaped region (inter-opening region) extending in the width direction between the two openings to the front and rear by a length that is half the length between the openings, the SCS central region; It is composed of an SCS ventral region located on the ventral side and an SCS dorsal region located on the dorsal side,
A disposable diaper in which the stretching force in the width direction in the SCS central region is larger than the stretching force in the width direction in each of the SCS ventral region and the SCS dorsal region.   The disposable diaper according to claim 1, wherein the stretching force in the width direction in the SCS central region is 1.1 to 5 times the stretching force in the width direction in each of the SCS ventral region and the SCS dorsal region. An absorber, a top sheet that is arranged so as to cover the upper surface of the absorber, and at least a part that is made of a liquid-permeable material, and a surface that covers the lower surface of the absorber, and is made of a liquid-impermeable material A disposable diaper comprising a front body, a crotch part and a back body,
A skin contact sheet (SCS) disposed on the top sheet;
The skin contact sheet has a stool passage opening and a urine passage opening through which urine can pass in a portion corresponding to the crotch,
A region (SCS central region) obtained by extending a band-shaped region (inter-opening region) extending in the width direction between the two openings to the front and rear by a length that is half the length between the openings, the SCS central region; It is composed of an SCS ventral region located on the ventral side and an SCS dorsal region located on the dorsal side,
The skin contact sheet is provided with an elastic elastic material,
A value obtained by dividing the total of the width direction component (length) in the SCS central region of the stretchable elastic material by the length in the longitudinal direction of the SCS central region is the total width direction component (length) in the SCS ventral region. Is greater than the value obtained by dividing the length of the SCS ventral region by the longitudinal length of the SCS and the sum of the width direction components (lengths) of the SCS dorsal region by the longitudinal length of the SCS dorsal region. Disposable diapers.   The skin contact sheet has two stretchable elastic materials that intersect in the SCS central region and extend in the longitudinal direction across the opening in each of the SCS ventral region and the SCS dorsal region. The disposable diaper according to 3.

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