JP4989930B2 - Disposable absorbent article - Google Patents

Description

  The present invention relates to a disposable absorbent article for children, adults or incontinence.

  Conventionally, as a disposable absorbent article of this type, an absorbent body is disposed between a rectangular liquid-permeable top sheet and a square liquid-impervious back sheet, and the outer side of the absorbent body. In addition, there is one in which a flap portion is formed by a top sheet and a back sheet.

  When wearing such a disposable absorbent article, various skin troubles may be caused for some reason at the portion where the skin of the wearer and the absorbent article are in contact with each other.

  For example, skin troubles may occur on the wearer's skin due to poor compatibility between the wearer's skin and the surface sheet in contact with the skin. In this case, select a surface sheet with good touch. Measures such as applying a lotion to the top sheet are taken.

  On the other hand, the worn absorbent article may deviate from the wearer's skin, and skin troubles may occur due to rubbing between the topsheet and the skin. In other words, the absorbent article to be worn is interlocked when clothes coming into contact with the absorbent article or other absorbent articles to be used together deviate from the wearer's body. As a result, the absorbent article itself to be worn on the skin is also worn by the wearer. Slips out of your skin.

  Further, when a normal absorbent article is displaced on the back sheet side, the top sheet side is also displaced in conjunction therewith.

Therefore, an absorbent article is known in which the movement of the back sheet and the movement of the top sheet are not interlocked (see, for example, Patent Documents 1 to 3). This absorbent article is configured so that the absorbent bodies arranged above and below can move independently in the width direction of the absorbent article in order to prevent side leakage of body fluids due to fluctuations and deviations of the absorbent article. Therefore, since the back sheet joined to the lower absorbent body and the top sheet joined to the upper absorbent body are not interlocked, the side leakage of body fluid due to deformation or displacement of the absorbent article is prevented. In addition to this, there is a possibility that the above-mentioned effect is also exhibited in eliminating skin troubles caused by rubbing between the top sheet and the skin.
Japanese Patent No. 2855011 (page 2-3, FIG. 1) Japanese Patent No. 2928669 (page 2-3, FIG. 3) Utility Model Registration No. 2535146 (2nd page, FIG. 1)

  However, the above-mentioned disposable absorbent article has the following problems.

  In the absorbent articles described in Patent Documents 1 and 2, the lower-layer absorbent body and the upper-layer absorbent body are coupled by left and right coupling sheets in which pleats are formed toward the center in the width direction of the absorbent article. Because the connecting sheet shifts to the left and right, the upper absorber does not interlock with the shift of the lower absorber, but the connecting sheet needs to expand the filter of the pleat filter in order to shift to the left and right. If the spread of the pleats does not occur when the absorbent article is worn, there is a possibility that the absorbers of both layers will eventually shift in conjunction with each other.

  Moreover, in the absorbent article described in Patent Document 3, the lower absorbent body and the upper absorbent body are connected by the left and right connecting sheets arranged so that spaces are formed on both sides of the lower absorbent body. Even if the lower layer absorber is shifted to the left or right by the width of the space between both sides of the absorber and the connecting sheet, the upper layer absorber is not linked to the shift of the lower layer absorber, but the connecting sheet is shifted left and right. Since the slipperiness of the connecting sheet in contact with the lower layer absorber is important, the friction coefficient between the absorber and the connecting sheet is large and the slipping is not good. May be shifted in conjunction with each other.

  That is, when the displacement of the absorbers of the upper and lower layers is interlocked, the topsheet and the backsheet joined together are also interlocked, so the topsheet is from the skin of the wearer of the absorbent article. There is a risk of slippage and rubbing between the topsheet and the skin.

  DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and is a disposable absorbent article that suppresses deviation from the wearer's skin when the wearer's clothes or other absorbent articles deviate from the wearer's body. The purpose is to provide.

The disposable absorbent article according to claim 1 has a top sheet, a back sheet, and an absorbent body disposed between the top sheet and the back sheet, and the longitudinal direction and the width direction of the absorbent body. A disposable absorbent article having a longitudinal direction flap portion and a width direction flap portion formed respectively outward, wherein the back sheet is formed by laminating a plurality of synthetic resin sheets, and the laminated synthetic resin sheet, similar the width direction flap portions on both sides, comprising a continuous portion formed of these synthetic resin sheets to each other in succession, continuously in the width direction throughout the longitudinal flap section, and the width direction flap In the vicinity of both side edges of the absorbent body in the longitudinal direction .

Disposable absorbent article 請 Motomeko 2 wherein, in the disposable absorbent article of claim 1, in which static friction coefficient of the contact surface of the laminated synthetic resin sheet each other, is set to 0.6 or less is there.

Disposable absorbent article according to claim 3, wherein, in the disposable absorbent article of claim 1, wherein, between the stacked synthetic resin sheet, intermediate synthetic resin sheet disposed static friction coefficient is 0.5 or less It is what has been.

The disposable absorbent article according to claim 4 is the disposable absorbent article according to any one of claims 1 to 3 , wherein a lubricant is applied to the inner surfaces of the laminated synthetic resin sheets.

According to the first aspect of the invention, the backsheet is formed by stacking a plurality of synthetic resin sheets, these laminated synthetic resin sheet each other, the continuous section by continuous hand in the width direction flap portions on both sides By forming, it becomes possible for each synthetic resin sheet to be displaced on the contact surface under external force, and on the side where it does not contact the wearer's skin due to displacement of clothing or other absorbent articles used together Even when the resin sheet is displaced, the synthetic resin sheet, the absorbent body, and the surface sheet that are in contact with the wearer's skin are in contact with a part of the wearer's body and can be fixed and interlocked with the displacement. without these topsheet, a deviation from the skin of a synthetic resin sheet of the wearer's side abutting it is possible to suppress the skin of the absorbent body and the wearer, the laminated synthetic resin sheet, the longitudinal direction all of the longitudinal flap section In the width direction, and continuously along the longitudinal direction in the vicinity of both side edges of the absorbent body in the width direction flap portion, while joining at each joint portion, while ensuring the displacement of the synthetic resin sheet These synthetic resin sheets can be prevented from being scattered by the joint portion .

According to the invention 請 Motomeko 2 wherein, by setting the static friction coefficient of the contact surface of the synthetic resin sheet together laminated to 0.6 or less, the synthetic resin sheet each other slippery become with the synthetic resin sheet together Since the shift easily occurs, the shift can more reliably suppress the shift from the wearer's skin when the wearer's clothes, other absorbent articles, and the like shift from the wearer's body.

According to the third aspect of the present invention, an intermediate synthetic resin sheet having a static friction coefficient of 0.5 or less is disposed between the laminated synthetic resin sheets, and the synthetic resin is interposed via the intermediate synthetic resin sheet. Since the sheets are slippery and slippage between the synthetic resin sheets is likely to occur, due to this slippage, the wearer's clothes and other absorbent articles, etc. from the wearer's skin when displaced from the wearer's body The shift can be more reliably suppressed.

According to invention of Claim 4 , by apply | coating a lubrication agent to the inner surface of laminated | stacked synthetic resin sheets, synthetic resin sheets become easy to slip through this lubricant, and the shift | offset | difference of synthetic resin sheets is carried out. Since it becomes easy to generate | occur | produce, the shift | offset | difference from a wearer's skin at the time of a wearer's clothes, another absorbent article, etc. shifting | deviating from a wearer's body can be suppressed more reliably by this shift | offset | difference.

Hereinafter, the configuration of the disposable absorbent article according to the first related art of the present invention will be described with reference to FIGS.

  1 to 4 show an absorbent pad P as a disposable absorbent article, and this absorbent pad P is used as an inner layer on a diaper body worn by a wearer. In addition, the absorbent pad P has the absorbent body 3 sealed between the rectangular topsheet 1 and the backsheet 2, covers both sides in the width direction of the topsheet 1, and is solid on the topside of the backsheet 2. Gather forming sheets 4 and 4 are disposed. And in the absorbent pad P, the longitudinal direction flap part 5 is formed along the width direction in the longitudinal direction both ends outward of the absorber 3, and the longitudinal direction is formed on both lateral sides of the absorbent body 3 in the longitudinal direction. The width direction flap part 6 is formed along.

  The top sheet 1 is formed of, for example, a woven fabric, a non-woven fabric, a porous film, a synthetic fiber, or the like, and has hydrophilicity or liquid permeability that allows permeation such as urine to pass through the absorber 3.

  The back sheet 2 is formed in a rectangular shape having a width dimension and a longitudinal dimension larger than those of the top sheet 1, and the skin contact side synthetic resin back sheet 11 as a synthetic resin sheet to which the top sheet 1 is bonded with an adhesive or the like; A non-skin contact side synthetic resin back sheet 12 as a synthetic resin sheet is laminated, and these synthetic resin back sheets 11 and 12 are continuously integrated along the longitudinal direction at continuous portions 13 on both sides in the left-right width direction. Is formed.

  The skin contact side synthetic resin back sheet 11 is located on the skin side of the wearer and is preferably formed of, for example, a polyethylene film in consideration of slipperiness.

  The non-skin contact side synthetic resin back sheet 12 is located outside the wearer's skin side, and in the same manner as the skin contact side synthetic resin back sheet 11, in consideration of slipperiness, for example, by a polyethylene film It is preferable to form.

  Further, the synthetic resin backsheets 11 and 12 have a static friction coefficient on the contact surface set to 0.6 or less by a process such as a discharge process. The static friction coefficient is a value obtained by a measurement method according to JIS K 7125, for example. And these synthetic resin backsheets 11 and 12 are formed so that parts other than the continuous part 13 may not be joined.

  A plurality of adhesive members are provided on the back side of the non-skin contact side synthetic resin back sheet 12, that is, on the main surface opposite to the skin contact side synthetic resin back sheet 11, in other words, on the outermost layer of the back sheet 2. Adhesive sheets 15, 15, and 15 are attached. Each pressure-sensitive adhesive sheet 15 fixes the absorbent pad P to a wearer's clothes or a diaper main body used together.

  The absorbent body 3 is capable of absorbing excretory fluids such as urine, and is formed into a rectangular shape using, for example, pulp as a main material and partly containing a material such as a polymer absorbent, and the skin contact side synthetic resin back sheet Bonded to 11 and fixed.

  The three-dimensional gather forming sheets 4 are respectively continuous over the entire longitudinal direction of the absorbent pad P and are separated from each other in the width direction of the absorbent pad P. Further, each three-dimensional gather forming sheet 4 has one side joined at the left and right side edges of the topsheet 1 and the other side is formed in a free end, and the other end of the free end is formed. In addition, the elastic members 17 for the three-dimensional gathers are respectively disposed and the elastic members 17 for the three-dimensional gathers contract the respective three-dimensional gather forming sheets 4 so that the other side portions of the free end shapes of the three-dimensional gather forming sheets 4 are illustrated. Not formed into a three-dimensional gather.

Next, the operation of the first related technique will be described.

  The absorbent pad P is fixed to the diaper main body with the adhesive sheet 15 in a state where the absorbent pad P is stacked on the crotch on the unillustrated diaper main body, and the diaper main body together with the absorbent pad P is worn by the wearer. The diaper body is appropriately folded and fixed to the wearer.

  At this time, the laminated synthetic resin backsheets 11 and 12 are formed with continuous portions 13 and 13 in the widthwise flap portion 6, so that the synthetic resin backsheets 11 and 12 receive the external force on the contact surface. It will be possible to move greatly back and forth and left and right.

  As a result, the absorbent pad P is bonded to the skin contact side synthetic resin back sheet 11 even when the non-skin contact side synthetic resin back sheet 12 is displaced along with the shift of clothes or the diaper main body used together. As shown in FIG. 4 (a) and FIG. 4 (b), the absorbent body 3 or the integral part such as the face sheet 1 is fixed with a certain amount of force in contact with a part of the wearer's body. Furthermore, the skin contact side synthetic resin back sheet 11 is not interlocked with the movement of the non-skin contact side synthetic resin back sheet 12. For this reason, even if clothes or the diaper main body used together shift | deviated, integral parts, such as the surface sheet 1, the absorber 3, and the skin contact side synthetic resin back surface sheet 11, are the ones of the wearer's skin which was contacting until then. Occurrence of the skin trouble of the wearer due to deviation from the part can be suppressed.

  In other words, when the garment or the diaper main body used together is displaced, the displacement is absorbed by the displacement of the synthetic resin backsheets 11 and 12, so that the position of the absorbent body 3 or the topsheet 1 is changed from the mounting position. There is no deviation.

  Further, the continuous portions 13 and 13 are formed along the longitudinal direction at both widthwise side portions of the absorbent pad P at the width direction flap portions 6 and 6, and the synthetic resin back sheet 11 is formed at portions other than the continuous portions 13 and 13. , 12 is not bonded, and the plastic resin back sheets 11, 12 are more likely to be displaced, and the displacement due to the movement of clothing or the diaper main body used together is more due to the displacement of the synthetic resin back sheets 11, 12. It can be reliably absorbed by the back sheet 2.

Further, the non-contacting side synthetic resin back sheet 12 is attached to the clothes or the diaper body used together by the adhesive sheet 15 and fixed to the clothes or the diaper body used together. Since the attachment position of the absorbent pad P may be greatly displaced due to this interlock, the effect of the back sheet 2 of the related technology that can absorb the displacement due to the movement of the clothes or the diaper main body used together is effective. Can be more prominent.

  Then, as shown in Table 1 below, the coefficient of static friction on the contact surface of the laminated synthetic resin back sheets 11 and 12 is set to 0.6 or less, so that FIG. 4 (a) and FIG. 4 (b) As shown in the figure, since the synthetic resin back sheets 11 and 12 become slippery, the synthetic resin back sheets 11 and 12 are liable to be displaced, and the displacement of the clothes or the diaper main body to be used together is more reliably detected. Can be absorbed.

In the first related art , the back sheet 2 is formed by integrally and continuously forming the synthetic resin back sheets 11 and 12 on both sides in the width direction, but as in the second related technique shown in FIG. Alternatively, the separate synthetic resin back sheets 11 and 12 may be joined and fixed to each other in the width direction by an adhesive or the like to form the continuous portion 13.

Next, a third related technique will be described with reference to FIGS. In addition, about the structure and effect | action similar to said each related technique , the same code | symbol is attached | subjected and the description is abbreviate | omitted.

In this third related technology , in each of the above related technologies , the synthetic resin back sheets 11 and 12 are joined in the width direction at both longitudinal end portions of the longitudinal direction flap portions 5 and 5, for example, as a continuous portion by an adhesive or the like. It is joined at the part 20.

  The joining portion 20 may be formed in at least one position of the joinable region 21 shown in FIG. 7, that is, the entire longitudinal flap portions 5 and 5.

  Therefore, the synthetic resin back sheets 11 and 12 are formed so that the entire outer edge portion is continuous by the continuous portions 13 and 13 on both sides in the width direction and the joint portions 20 and 20 of the longitudinal flap portions 5 and 5. Has been.

And by being comprised in this way, while having the same effect as said each related technique , since the synthetic resin back surface sheets 11 and 12 are joined in the longitudinal direction flap parts 5 and 5, these It can suppress that the synthetic resin back surface sheets 11 and 12 are spaced apart from the longitudinal direction flap parts 5 and 5, and usability falls.

  In addition, since the synthetic resin back sheets 11 and 12 are continuously joined at the longitudinal flap portions 5 and 5, when the synthetic resin back sheets 11 and 12 are displaced as shown in FIGS. Further, it is possible to reliably prevent the end portions of these synthetic resin back sheets 11 and 12 from separating from the longitudinal flap portions 5 and 5 to deteriorate the appearance.

In the third related technique , each joining portion 20 may not be formed continuously in the entire longitudinal flap portion 5 as long as at least a part of each joining portion 20 is joined.

Next, an embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to said each related technique , the same code | symbol is attached | subjected and the description is abbreviate | omitted.

Form of this one embodiment, in the above related art, the synthetic resin back sheet 11, 12 are continuous in the width direction in the entire longitudinal flap portions 5,5 and the absorbent body 3 in the widthwise direction flaps 6,6 In the vicinity of both side edge portions, the joint portions 22 are joined at the joint portion 22 as a continuous portion, for example, with an adhesive or the like.

  The joining portion 22 is formed in the joinable region 23 shown in FIG. 11, that is, at least one position of the entire longitudinal flap portions 5 and 5 and at least one position of the entire width direction flap portions 6 and 6. do it.

  The synthetic resin back sheets 11 and 12 are continuous by the continuous portion 13 and the joining portion 22 at the entire lengthwise flap portions 5 and 5 and at both side edges of each widthwise flap portion 6.

As a result, by configuring as described above, as shown in FIGS. 12 (a) and 12 (b), the skin contact side synthetic resin back sheet 11 is replaced with the non-skin contact side synthetic resin back sheet 12. Since it is not interlocked with the displacement movement, the same effect as each related technology can be obtained, and the laminated synthetic resin sheets can be used not only in the width direction flap portions 6 and 6 but also in the longitudinal direction flap portions 5 and 5. By joining at least a part, while securing the displacement of the synthetic resin back sheet 11, 12, the position where the synthetic resin back sheet 11, 12 does not disperse is appropriately selected from the joinable region 23, and the joining part 22 is formed. Can be formed.

  Moreover, although the synthetic resin back surface sheets 11 and 12 are most difficult to shift by forming the joint portion 22 along both side edges in the width direction of the absorbent body 3, absorption to be joined to the skin contact side synthetic resin back surface sheet 11. The joint area of the body 3 is made at least smaller than the area of the absorbent body 3, that is, only a part of the absorbent body 3 is joined to the skin contact side synthetic resin back sheet 11, thereby making the synthetic resin back sheets 11, 12 It is possible to reliably cause the deviation.

Furthermore, in the said one Embodiment, it is good also as a position which overlaps the area | region 23 which can be joined to the width direction both sides edge part of the absorber 3 like the 4th related technique shown in FIG. In this case, it is preferable that the width dimension of the non-joining portion 24 at the center portion in the width direction of the synthetic resin backsheets 11 and 12 is 60 mm or more.

  That is, for example, the back sheet 2 has a width dimension of 250 mm × longitudinal dimension of 400 mm, the absorber 3 has a width dimension of 130 mm × longitudinal dimension of 300 mm, each longitudinal flap portion 5 has a width dimension of 50 mm, and each widthwise flap portion 6 has a width dimension of 60 mm. When the absorber 3 is positioned on the back sheet 2 and the back sheet 2 is joined to the skin contact side synthetic resin back sheet 11 with a width of 20 mm along the longitudinal direction at the center in the width direction, As shown in Table 2 below, when the non-bonded portions 24 of the sheets 11 and 12 are 40 mm, 60 mm, and 80 mm, the ease of displacement of the back sheet 2 was evaluated. If it is less, the synthetic resin backsheets 11 and 12 will not be displaced, and if the width dimension of the non-bonding portion 24 is 60 mm or more, the bonding area of the absorbent body 3 bonded to the skin contact side synthetic resin backsheet 11 is set. By making it smaller than the area of the non-joint part 24, the deviation of the synthetic resin backsheets 11 and 12 can surely occur.

And in said one Embodiment and each related technology , the back surface sheet 2 may be comprised with synthetic resin sheets, such as a 3 or more sheet of polyethylene films, and like the 5th related technology shown in FIG. Further, an intermediate synthetic resin sheet 25 such as a nonwoven fabric sheet may be disposed between the synthetic resin back sheets 11 and 12. In this case, it is preferable that the intermediate synthetic resin sheet 25 is slippery. For example, if the coefficient of static friction is 0.5 or less, the intermediate synthetic resin sheet 25 is a synthetic resin sheet on the skin contact side or a non-slip side. Even if it is not suitable as a synthetic resin sheet on the skin contact side, by selecting a sheet specialized in sliding performance, the synthetic resin back sheet 11, 12 becomes slippery. The back sheet 2 can more reliably absorb the shift due to the movement of clothes or the diaper main body used together.

In addition, as in the sixth related technique shown in FIG. 15, it is possible to apply the lubricant 26 between the inner surfaces of the synthetic resin back sheets 11 and 12, that is, between the synthetic resin back sheets 11 and 12. is there. Even in this case, since the synthetic resin back sheets 11 and 12 become slippery, the synthetic resin back sheets 11 and 12 are liable to be displaced, and the displacement due to the movement of clothes or the diaper main body used in combination is more reliably confirmed. 2 can absorb.

Further, as in the seventh related art shown in FIG. 16, a synthetic resin reinforcing sheet 27 such as another polyethylene film or a nonwoven fabric sheet is disposed on the outermost layer of the back sheet 2 or laminated by bonding. Or you may. In this case, it can be reinforced by the synthetic resin reinforcing sheet 27 so that the back sheet 2 is not torn while it repeatedly shifts.

1 is a plan view showing a disposable absorbent article according to a first related technology of the present invention with a part cut away. It is a top view which abbreviate | omits and shows a disposable absorbent article same as the above. It is a vertical front view which shows a disposable absorbent article same as the above. (a) is a longitudinal front view showing a leftward shift of the disposable absorbent article, and (b) is a longitudinal front view showing a rightward shift of the disposable absorbent article. It is a vertical front view which shows the disposable absorbent article of the 2nd related technique of this invention. It is a vertical side view which shows the disposable absorbent article of the 3rd related art of this invention. It is a top view which abbreviate | omits and shows a disposable absorbent article same as the above. It is a vertical side view which shows the deformation | transformation state of the continuous part in the shift | offset | difference state of the synthetic resin sheet of a disposable absorbent article same as the above. It is a vertical side view which shows the deformation | transformation state of the continuous part in the shift | offset | difference state of the synthetic resin sheet of a disposable absorbent article same as the above. It is a vertical front view which shows the disposable absorbent article of one embodiment of this invention. It is a top view which abbreviate | omits and shows a disposable absorbent article same as the above. (a) is a longitudinal front view showing a leftward shift of the disposable absorbent article, and (b) is a longitudinal front view showing a rightward shift of the disposable absorbent article. It is a top view which abbreviate | omits one part and shows the disposable absorbent article of the 4th related technique of this invention. It is a vertical front view which shows the disposable absorbent article of the 5th related technique of this invention. It is a vertical front view which shows the disposable absorbent article of the 6th related technique of this invention. It is a vertical front view which shows the disposable absorbent article of the 7th related technique of this invention.

P Absorbent pad as disposable absorbent article 1 Top sheet 2 Back sheet 3 Absorber 5 Longitudinal flap part 6 Width flap part
11 Skin contact side synthetic resin back sheet as a synthetic resin sheet
12 Non-skin contact side synthetic resin back sheet as a synthetic resin sheet
13 Continuous part
22 junction
25 Intermediate synthetic resin sheet
26 Lubricant

Claims (4)

It has a top sheet, a back sheet, and an absorbent body disposed between the top sheet and the back sheet, and a longitudinal flap portion and a width are respectively provided outwardly in the longitudinal direction and the width direction of the absorbent body. A disposable absorbent article formed with a direction flap part,
The back sheet is formed by laminating a plurality of synthetic resin sheets,
The synthetic resin sheet are laminated by two the width direction flap portions on both sides, these synthetic resin sheets to each other with a continuous portion which is formed continuously, continuously in the width direction throughout the longitudinal flap portions, And the disposable absorbent article characterized by being continuously joined along the longitudinal direction in the width direction flap portion in the vicinity of both side edges of the absorbent body, respectively, at the joint portion . Static friction coefficient at the contact surface of the laminated synthetic resin sheet each other, the disposable absorbent article of claim 1 wherein characterized in that it is set to 0.6 or less. The disposable absorbent article according to claim 1 or 2 , wherein an intermediate synthetic resin sheet having a static friction coefficient of 0.5 or less is disposed between the laminated synthetic resin sheets. The disposable absorbent article according to any one of claims 1 to 3 , wherein a lubricant is applied to the inner surfaces of the laminated synthetic resin sheets.

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