JP4671876B2 - Pants-type absorbent article - Google Patents

Description

  The present invention relates to a pants-type absorbent article.

A conventional pant-type absorbent article includes a pant-type disposable diaper that uses a stretchable panel portion having breathability in order to improve fit and breathability.
For example, Patent Literature 1 discloses a pair of pants-type disposable diapers that are divided into an abdominal side portion, a back side portion, and a crotch portion located between the abdominal side portion, and a pair of breathable abdomen on both sides of the abdominal side portion. Side stretchable panel parts are provided, and both sides of the back side part are provided with a pair of breathable backside stretchable panel parts, and are located on the same side in the longitudinal direction. The panel portion and the back elastic panel portion are bonded in a partially overlapped state on the side portion of the diaper to form a side seal portion, and the side seal portion is a side edge of the ventral elastic panel portion. Part and the side edge part of the back side elastic panel part are bonded and formed by a plurality of individually spaced clusters, and the non-adhesive part of the side seal part is from 20% of the length of the side seal part. Pants-type disposable diapers in the range of up to 65% are disclosed It has been.

  In the diaper of Patent Document 1, the side seal portion is overlapped so that the side edge portion of the ventral elastic panel portion and the side edge portion of the back elastic panel portion are laminated on the skin surface of the diaper wearer. Because it is bonded, it does not protrude outward from the diaper wearer like the conventional side seal part, and it looks neat, and even if you wear clothes on the diaper Don't be. However, each cluster in the side seal part is formed in a portion between the side edge of the ventral elastic panel part and the side edge of the back elastic panel part, so that both side edges are the other elastic part. Since it is not bonded to the conductive panel portion, it is a free end along the side seal portion. Therefore, the side edge located on the outer surface of the diaper may be caught by something while the diaper is worn. In addition, when the diaper wearer is an infant or a person with dementia, the side edge portion located on the outer surface of the diaper may be picked and pulled, and the side seal portion may be torn. Further, the presence of the above-mentioned free end in the side seal portion may be inferior in appearance.

JP 2002-369842 A

  Therefore, the objective of this invention is providing the underpants type absorbent article which has a side seal part which does not have a possibility of tearing during wear, does not protrude, and has a good appearance.

The present invention includes an absorbent main body including an absorbent core, and a substantially vertically long outer packaging material having an hourglass shape in the unfolded state, and the absorbent main body is disposed at the center in the width direction of the outer packaging material. A pant-type absorbent article having an abdominal side portion, a back side portion and a crotch portion located between them, and a pair of left and right side portions of the abdominal side portion in the outer packaging material, and in the outer packaging material The pair of left and right side portions on the back side portion are sealed in a superimposed state to form a pair of side seal portions, and each of the pair of side seal portions is on the side of the ventral side portion in the outer packaging material. Provided is a pants-type absorbent article formed from a seal part extending over a part of the edge and the back side part or a seal part extending over a part of the side edge of the back side part and the abdomen side part of the outer packaging material. To achieve the above objective. .

According to a pants-type absorbent article such as a pants-type disposable diaper having a side seal portion of the present invention, the side seal portion is not likely to be broken during wearing of the diaper, and does not stick out and looks good.

  Hereinafter, a preferred embodiment of the pant-type absorbent article of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, a pants-type disposable diaper as a pants-type absorbent article 1 according to this embodiment includes a liquid-permeable top sheet 2 and a liquid-impervious (including poorly liquid-permeable) back sheet. 3 and an absorbent main body 5 including a liquid-retaining absorbent core 4 interposed between the two sheets, and a substantially vertically long outer packaging material 10 having an hourglass shape in the developed state. Reference numeral 5 denotes a central portion in the width direction of the outer packaging material 10.
This diaper 1 has an abdominal side A that is disposed on the abdomen side of the wearer when worn, a back side B that is disposed on the back side of the wearer, and a crotch C positioned therebetween. The ventral portion A, the dorsal portion B, and the crotch portion C are each formed when the unfolded diaper 1 is divided into three regions so that the entire length in the longitudinal direction (vertical direction in FIG. 2) is divided into approximately three equal parts. It is an area. The unfolded state refers to a state where the diaper 1 is unfolded in a flat shape as shown in FIG. 2 by peeling or cutting portions located on the left and right sides of the wearer.

  Moreover, the diaper 1 of this embodiment is sealed in a state where the pair of left and right side portions of the abdominal side portion A of the outer packaging material 10 and the pair of right and left side portions of the back side portion B of the outer packaging material 10 are overlapped. As shown in FIG. 1, a pair of side seal portions 14, 14 is formed, and each of the pair of side seal portions 14, 14 corresponds to the side edge of the ventral side portion A and the back side portion B of the outer packaging material 10. A part of the sealing part 15 and a part of the side part of the back side part B and the part of the abdominal side part A in the outer packaging material 10 are formed.

  When the diaper 1 of this embodiment is explained in full detail, the absorptive main body 5 makes a vertically long rectangular shape, and as shown in FIG. 2, the longitudinal direction is made to correspond to the longitudinal direction of the diaper 1 in an unfolded state, It is joined to the width direction center part of the exterior body 10 by well-known joining means, such as a hot-melt-type adhesive agent, so that it may extend from A to the back side part B.

As shown in FIG. 2, the outer packaging material 10 includes a vertically-long rectangular main body fixing portion 11, and ventral-side stretchable panel portions 12, 12 connected to both side edges of the main body fixing portion 11 in the ventral side A. The back side B comprises back side elastic panel parts 13 and 13 connected to both side edges of the main body fixing part 11, and in the diaper deployed state, the crotch part C is constricted as a whole. ing.
The outer packaging material 10 is located on the same side in the front-rear direction in the wearing state of the diaper, and the abdominal elastic panel portions 12 and 12 and the back elastic panel portions 13 and 13 partially overlap each other on the side of the diaper. As shown in FIG. 1, side seal portions 14 and 14 are formed. Further, the seal forms a waist opening 7 and a pair of leg openings 8 and 8.
In the present embodiment, the ventral elastic panel portions 12 and 12 that are both sides of the ventral side A in the outer packaging material 10 and the back elastic panel portions 13 and 13 that are both sides of the back side B are respectively heated. Contains fusible fibers.

  The main body fixing portion 11 is made of a substantially non-stretchable sheet material. Examples of the sheet material include various nonwoven fabrics (single layer or multilayer nonwoven fabric), laminates of nonwoven fabrics and films, and laminates of nonwoven fabrics and woven fabrics. Etc. can be used.

  The belly side stretchable panel portion 12 and the back side stretchable panel portion 13 have stretchability in at least the width direction of the unfolded diaper, and examples of materials that can be used for each include an elastomer sheet. . In this embodiment, the elastomer sheet has heat-fusibility.

  When the diaper is worn, the abdominal side A and the back side B of the main body fixing part 11 approach or separate from each other due to the movement of the wearer. The diaper side part formed integrally with each other expands and contracts in a direction substantially orthogonal to the side seal part 14. Therefore, a force that tears the joined state of the ventral stretch panel portion 12 and the back stretch panel portion 13 acts on the side seal portion 14.

  The side seal part 14 of the diaper 1 of this embodiment is further demonstrated. In the side seal part 14, the abdominal stretchable panel part 12 and the dorsal stretchable panel part 13 straddle the side edge 12A of the abdominal stretchable panel part 12 as shown in FIG. It is joined by a seal portion 15 straddling the side edge 13A of the portion 13. The side seal portion 14 is formed substantially in parallel with the side edges 12A and 13A.

  In the present embodiment, the seal portion 15 is formed by heat sealing or ultrasonic sealing. Since each of the abdominal stretch panel portion 12 and the back stretch panel portion 13 has heat-fusibility, it can be easily joined to each other by the sealing means described above.

As shown in FIG. 3, the seal portion 15 includes a side edge 12 </ b> A of the ventral side elastic panel portion 12 of the ventral side portion A and the back side elastic panel portion of the back side portion B in the side seal portion 14. Each of the 13 side edges 13A is formed.
The seal portion 15 extends over part of the side edge 12A of the ventral side A and the back side elastic panel portion 13 of the back side B in the outer packaging material 10 and the side edge 13A of the back side B of the outer packaging material 10. And a part of the abdominal side elastic panel part 12 of the abdominal side part A, and further formed over the side edge 12A and the side edge 13A. The seal portion 15 is formed across the side edges 12A and 13 from a part of the ventral side elastic panel portion 12 of the ventral side A to a part of the back side elastic panel portion 13 of the back side B as a whole. Has been.

  A plurality of seal portions 15 are formed at intervals along the side seal portions 14. Specifically, the seal portions 15 are arranged at regular intervals along the side seal portions 14 and are arranged in a regularly arranged pattern.

In the side seal portion 14, the side edge 12 </ b> A is in close contact with and partially joined to the back side elastic panel portion 13, and the side edge 13 </ b> A is in close contact with the ventral side elastic panel portion 12. The both side edges 12A and 13A are not substantially formed with a free end along the side seal portion 14.
Further, since the seal portions 15 are formed apart from each other, the rigidity of the side seal portion 14 is not increased, and the flexibility of the diaper side portion is ensured.

As shown in FIG. 3, the seal portion 15 has a narrow horizontally long rectangular shape, and is provided for the side edge 12 </ b> A of the ventral elastic panel portion 12 and the side edge 13 </ b> A of the back elastic panel portion 13. And formed so as to be substantially orthogonal.
FIG. 3 shows the diaper side part located on the left side of the wearer of the diaper, and the side part of the abdominal elastic panel part 12 overlaps the side part of the back elastic panel part 13 from the outside. . In addition, the side part of the back side elastic panel part 13 may overlap with the abdominal side elastic panel part 12 from the outer side.

  The longitudinal direction of the seal portion 15 coincides with the expansion / contraction direction of the diaper side portion when the diaper is worn, that is, a direction in which a tearing force acts on the side seal portion 14. Thus, since the seal part 15 is formed vertically long along the direction of the force of tearing the side seal part 14, the bonding strength between the abdominal stretch panel part 12 and the back stretch panel part 13 is high. Has been enhanced.

  In the side seal part 14, the width of the side part of the ventral elastic panel part 12 and the side part of the back elastic panel part 13 is preferably 10 to 30 mm, particularly preferably 15 to 25 mm. The overlapping width is preferably 10 mm or more in order to ensure the bonding strength of the side seal portion 14. On the other hand, it is preferable that the overlapping width is 30 mm or less in order to suppress the bulkiness of the diaper side and to secure the wearability.

  In the side seal part 14 having the overlap width described above, the side edges 12A and 13A are brought into close contact with the ventral elastic panel part 12 or the back elastic panel part 13 and the side edges 12A and 13A along the side seal part 14 are adhered. In order not to form the free end, it is preferable that the seal portion 15 has the dimensions and arrangement described below.

  The width of the seal portion 15 is preferably 3 to 35 mm, particularly 5 to 30 mm. By setting the width of the seal portion 15 to 3 mm or more, the bonding strength at the seal portion can be secured. On the other hand, it is preferable that the width of the seal portion 15 is 35 mm or less in order to easily tear the side seal portion 14 after use of the diaper and to suppress the rigidity of the side portion of the diaper and to secure the wearability. The width of the seal portion 15 is a length in a direction orthogonal to the longitudinal direction of the seal portion 15.

  The length of the portion of the seal portion 15 where the seal portion 15 straddles the side edge 12A of the ventral elastic panel portion 12 and extends from the ventral elastic panel portion 12 side to the back elastic panel portion 13 side is It is preferable that it is 15-35 mm, especially 20-30 mm. Similarly, the seal 15 extends over the side edge 13A of the back elastic panel 13 and extends from the back elastic panel 13 to the abdominal elastic panel 12 side. The same applies to the length.

  The interval at which the seal portions 15 are separated from each other along the side seal portion 14 is preferably 1 to 27 mm, particularly 3 to 20 mm. When the space | interval which separates the seal parts 15 is this range, it is hard to open a mouth and the touch is also favorable.

  Further, in the side seal portion 14, the length along the side seal portion 14 between the edge on the side of the waist opening 7 and the seal portion 15 closest to the end edge is 10 mm or less, particularly 3 mm or less. It is preferable that the free ends of the side edges 12A and 13A are not substantially formed in the vicinity of the edge. From the same viewpoint, in the side seal portion 14, the length along the side seal portion 14 between the end edge on the leg opening 8 side and the seal portion 15 closest to the end edge is 10 mm or less, particularly 3 mm. The following is preferable.

  In manufacturing the diaper 1 of this embodiment described above, when the side seal portion 14 is processed, the above-described seal portion 15 can be easily manufactured. When heat sealing is used, for example, both side edges 12A, 13 are formed from a part of the ventral side elastic panel part 12 of the ventral side part A to a part of the back side elastic panel part 13 of the back side part B. What is necessary is just to use the heat seal processing apparatus provided with the embossing roll regularly arrange | positioned on the surrounding surface, and the anvil roll arrange | positioned facing the vertically long convex part formed so that it might straddle. Further, in the case of using the ultrasonic sealing process, for example, an ultrasonic sealing apparatus having a vertically long head shape formed in the same manner as described above may be used.

  The diaper 1 of this embodiment will be further described. A pair of leak-proof cuffs 6 and 6 are formed on both sides of the absorbent main body 5 in the longitudinal direction of the diaper 1 as shown in FIG. The leak-proof cuff 6 is formed so as to extend in the longitudinal direction of the absorbent main body 5 and the diaper 1, respectively. The leak-proof cuff 6 includes a leak-proof cuff forming sheet joined to the absorbent main body 5 or an exterior body 10 in the vicinity thereof, and an elasticity for forming a leak-proof cuff fixed in an extended state near the free end of the leak-proof cuff 6 A member 61 is provided.

  Next, the material which forms each part of the diaper 1 of this embodiment is demonstrated. As materials for forming the abdominal stretch panel portion 12 and the back stretch panel portion 13, elastomer films, elastomer nonwoven fabrics, and the like containing polyolefin resins such as polypropylene and polyethylene are preferable.

  As the top sheet 2, the back sheet 3, the absorbent core 4, the leakproof cuff forming sheet, and the elastic member 61 forming the diaper 1 of the present embodiment, various materials used in conventional absorbent articles are particularly used. Can be used without limitation.

  According to the diaper 1 of the present embodiment described above, the side edges 12A and 13A are in close contact with and partially joined to the both stretchable panel portions 12 and 13, and do not substantially form a free end. There is no possibility that the side seal part 14 is caught on something or broken during wearing. Moreover, since the side part of the abdominal side elastic panel part 12 and the side part of the back side elastic panel part 13 are piled up and joined so that it may laminate | stack on a diaper wearer's skin, it does not protrude and is good-looking. .

Next, a modified example of the diaper 1 of the present embodiment described above will be described below with reference to FIGS. Regarding the modification described below , the description in detail regarding the above-described embodiment is applied as appropriate to points that are not particularly described. 4-7, the same code | symbol is attached | subjected to the same member as FIGS. 1-3. The form shown in FIG. 7 is a reference example of the present invention.

  In the diaper 1 having the form shown in FIG. 4, the seal portion 15 intersects the side edge 12 </ b> A of the abdominal stretch panel portion 12 and the side edge 13 </ b> A of the back stretch panel portion 13 obliquely. Is formed.

In the diaper 1 shown in FIGS. 5 (a) to 5 (e), in the side seal part 14, the seal part 15 has side edges 12 </ b> A of the ventral elastic panel part 12 and side edges of the back elastic panel part 13. Each of 13A is formed. In the present embodiment, the seal portion 15 does not straddle from one side edge 12A to the other side edge 13A. That is, the seal portion 15 that straddles either the side edge 12A or the side edge 13A does not straddle the other side edge.
The diaper having the side seal portion 14 shown in FIGS. 5A to 5E does not have a seal portion formed between the side edges 12A and 13A, so the width of the seal portion 15, the interval between the seal portions 15 or the seal. If the number of the parts 15 etc. are adjusted and the joint strength as the whole side seal part 14 is ensured, it is preferable when improving the air permeability and the softness | flexibility in a diaper side part.

  In the diaper 1 shown in FIGS. 5A and 5B, the seal portions 15 are arranged in a staggered pattern along the side seal portions 14. In the diaper 1 shown in FIG. 5 (a), the seal portion 15 is formed in a direction substantially orthogonal to the side edges 12A and 13A. In the diaper 1 shown in FIG. 5 (b), the seal portion 15 is The side edges 12A and 13A are formed so as to cross each other obliquely.

  In the diaper 1 shown in FIG. 5 (c), the seal portion 15 is formed side by side on both side edges 12A and 13A.

  In the diaper 1 having the form shown in FIG. 5D, the seal portions 15 are arranged in a pattern regularly arranged along the side seal portions 14. More specifically, one composite seal portion composed of three seal portions 15, 15, 15 extending over a part of the side edge 12 </ b> A and the back side elastic panel portion 13, and the side edge 13 </ b> A and the ventral side elastic panel portion 12. The other composite seal portion composed of two seal portions 15, 15 extending in part is alternately arranged along the side seal portion 14.

In the diaper 1 shown in FIG. 5 (e), the sealing member 15 has a circular shape in plan view, and is formed side by side on both side edges 12A and 13A.
In the seal part 15 of the diaper 1 shown in FIG. 5 (e), the width of the seal part 15 changes along the direction orthogonal to the side seal part 14.

  The diaper 1 of the form shown in FIG. 6 has the belly side elastic panel part 12 and the back side elastic panel part 13 joined together via the elastic panel part 16 which consists of another member. The stretchable panel portion 16 and the ventral stretchable panel portion 12 are joined by forming a side seal portion 14 similar to that of the above-described embodiment. Similarly, the elastic panel part 16 and the back side elastic panel part 13 are joined.

  In the diaper 1 shown in FIGS. 7A and 7B, the seal portion 15 is formed only on the side edge 12 </ b> A of the ventral elastic panel portion 12. In the diaper 1 shown to Fig.7 (a), the planar view shape of the seal | sticker part 15 is an elliptical shape, The longitudinal direction is orthogonal to both-side edge 12A, 13A. In the diaper 1 shown in FIG.7 (b), the planar view shape of the seal | sticker part 15 is circular shape.

The pants-type absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, in the pant-type absorbent article of the present invention, the both sides of the portion located on the stomach side A and the both sides of the portion located on the back side B of the outer packaging material 10 do not have elasticity. Also good.
Moreover, in the diaper 1 shown in FIGS. 7A and 7B, the seal portion 15 may be formed on the side edge 13 </ b> A of the back-side stretchable panel portion 13.
In addition, the description omitted portion in one embodiment described above and the portion included in only one embodiment can be mutually used as appropriate.

  The pants-type disposable diaper of the present embodiment may be an infant diaper, an adult diaper, or an adult urinary incontinence diaper.

FIG. 1 is a perspective view showing a pants-type disposable diaper as an embodiment of the pants-type absorbent article of the present invention. FIG. 2 is a plan view illustrating a state in which the diaper illustrated in FIG. FIG. 3 is a plan view showing a side seal portion of the diaper shown in FIG. FIG. 4 is a plan view showing a main part of a modification of the diaper shown in FIG. FIGS. 5A to 5E are plan views showing the main part of another modification of the diaper shown in FIG. FIG. 6 is a plan view showing a main part of still another modified example of the diaper shown in FIG. FIGS. 7A and 7B are plan views showing the main part of still another modification of the diaper shown in FIG.

Explanation of symbols

1 Pants-type disposable diapers (pants-type absorbent articles)
2 Top sheet 3 Back sheet 4 Absorbent core 5 Absorbent body 6 Leak-proof cuff 7 Waist opening 8 Leg opening 10 Outer packaging material 11 Main body fixing part 12 Abdominal elastic panel part 13 Back elastic panel part 14 Side seal Part 15 Seal part A Abdominal side B Back side C Crotch

Claims (5)

An absorbent main body including an absorbent core, and an outer packaging material having a substantially hourglass shape with an outline in an unfolded state, and the absorbent main body is arranged in the center in the width direction of the outer packaging material, A pants-type absorbent article having a ventral part, a dorsal part and a crotch part located between them,
The abdomen side left and right pair of both side portions in the outer packaging material and the back side portion left and right pair of both side portions in the outer packaging material are sealed in a superimposed state, and a pair of side seal portions are formed,
Each of the pair of side seal portions includes a seal portion covering a side edge of the ventral side portion and a part of the back side portion of the outer packaging material, or a side edge of the back side portion and the ventral side portion of the outer packaging material. It is formed from the seal part over a part of
A plurality of the seal portions are formed at intervals along the side seal portions,
Each of the plurality of seal portions has a horizontally long shape, and intersects the side edge of the abdomen side portion of the outer packaging material or the side edge of the back side portion of the outer packaging material. Formed,
In the side seal portion, the seal portion is formed on each of the side edge of the ventral side portion and the side edge of the back side portion of the outer packaging material,
The underpants type absorbent article whose dimension of each part in the said side seal part is as the following 1) -3) .
1) The width | variety with which the said side part of the said ventral part and the said side part of the said dorsal part overlap is 10-30 mm.
2) The extending length of the seal portion straddling the side edge of the abdominal side portion from the side edge of the abdominal side portion to the side portion side of the dorsal side portion is 15 to 35 mm.
3) The extending length from the side edge of the back side portion to the side portion side of the ventral side portion of the seal portion straddling the side edge of the back side portion is 15 to 35 mm. The seal portion, along said side seal portion, staggered or regularly pant-type absorbent article of claim 1 Symbol placement is arranged to arranged the pattern. The seal portion, the side edges and the pull-on absorbent article according to claim 1, characterized in that formed over the side edges of the rear section of the front section of the outer material. The both sides of the abdomen side part and the both sides part of the back side part in the outer packaging material each contain a heat-fusible fiber, and the seal part is formed by heat sealing or ultrasonic sealing. The underpants-type absorbent article according to any one of to 3 . The outer packaging material includes a main body fixing portion, an abdominal elastic panel portion connected to both side edges of the main body fixing portion in the ventral side portion, and both side edge portions of the main body fixing portion in the back side portion. It consists of a back-side stretchable panel portion provided continuously, and the outer packaging material is located on the same side in the front-rear direction in a diaper wearing state, and the ventral-side stretchable panel portion and the back-side stretchable panel portion are: The pants-type absorbent article according to any one of claims 1 to 4 , wherein the side seal part is formed by being joined in a state of being partially overlapped at a side part of the diaper.

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