JP3948870B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article such as a disposable diaper that is less likely to be deformed or deformed by an absorbent body, is easy to attach, and has excellent fit and leakage prevention performance.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, it has a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent body, and is substantially vertically long, and a back that extends and contracts in the width direction on the back side. Disposable diapers having side elastic portions are widely used.
The back elastic part in such a disposable diaper is formed by arranging an elastic member so as to cross the absorber on the waist part arranged around the waist of the wearer and the waist part arranged around the waist. Has been.
For this reason, in such conventional disposable diapers, the absorber and the sheet material arranged adjacent to the absorber are likely to be deformed or deformed, the back side fit, leakage prevention performance, ease of wearing, etc. The point was not enough.
[0003]
Accordingly, an object of the present invention is to provide an absorbent article such as a disposable diaper that is less likely to be deformed or deformed by the absorbent body or the sheet material disposed adjacent thereto, is easy to wear, and has excellent fit and leakage prevention performance. It is to provide.
[0004]
[Means for Solving the Problems]
The present invention includes a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-holding absorber, and is substantially vertically long. In the absorbent article in which the waist part elastic member is arranged along the width direction of the absorbent article and the back side elastic part is formed,
The dorsal elastic part is composed of a pair of side elastic parts located on the left and right outer sides of the both side edges of the absorber, and a central connecting part located between the pair of side elastic parts. The waistline elastic member is fixed in a stretched state so that the waistline elastic member exhibits elastic stretchability, and the waistline elastic member is elastically stretchable at a portion of the central connecting portion where the absorber exists. inelastic portion is formed which does not express,
The waist part elastic member is arranged along the width direction of an absorptive article in the waist part located in the circumference of a wearer's waist in the back side part, and the 2nd back side elastic part is formed,
The second back side elastic portion includes a pair of side elastic portions positioned on the left and right outer sides of both side edges of the absorber, and a center connecting portion positioned between the pair of side elastic portions, The waist elastic member is fixed in a stretched state to the elastic elastic portion so as to exhibit elastic stretchability, and in the central connecting portion, the portion where the absorber exists or the upper side in the longitudinal direction of the absorber The above object is achieved by providing an absorbent article in which a non-elastic portion in which the waist elastic member does not exhibit elastic stretchability is formed at a position located in the region .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on a preferred embodiment thereof.
As shown in FIG. 1, the disposable diaper 1 as an absorbent article of the present embodiment includes a liquid-permeable surface sheet 2, a liquid-impermeable leak-proof sheet 3, and a liquid-retaining absorbent body 4, A so-called unfolded type that has a substantially vertically long form and has fastening tapes 71, 71 for wearing a pair of left and right diapers on both side edges of the back side portion A arranged on the back side of the wearer when worn. In the disposable diaper, a plurality of waistline elastic members 21 are arranged along the width direction of the diaper on a waistline A1 located around the wearer's waist in the backside A, and the first elastic backside elastic part 21 is the first backside elastic part. A dorsal elastic portion 10A is formed. In addition, a plurality of waist elastic members 22 are arranged along the width direction of the diaper on the waist A2 located around the wearer's waist in the back side A, and the second back as the second back side elastic part. A side elastic portion 10B is formed. Specifically, on the left and right sides of the diaper 1 in the longitudinal direction of the diaper 1, four waistline elastic members 21, 21, respectively, are arranged, and in the waist part A 2 of the diaper 1 in the longitudinal direction. Three waist elastic members 22 and 22 are arranged on the left and right sides, respectively.
[0006]
The top sheet 2 and the leak-proof sheet 3 each have a larger outer dimension than the absorbent body 4, and the absorbent body 4 is sandwiched and fixed between the two sheets 2 and 3. A non-woven outer layer sheet 5 is disposed on the outer surface of the leak-proof sheet 3.
The leak-proof sheet 3 extends so that both side edges thereof are located on the left and right outer sides than the both side edges 4 a and 4 a of the absorber 4, and the outer layer sheet 5 has both side edges on the leak-proof sheet 3. It extends so as to be located on the left and right sides further than both side edges 3a (only one is shown).
[0007]
The absorbent body 4 has a substantially rectangular vertically long shape in a state where the disposable diaper 1 is expanded in a planar shape (hereinafter referred to as a tensioned state), and the left and right sides of the absorbent body 4 are disposed on both sides in the longitudinal direction of the diaper. A pair of left and right three-dimensional guards 6 and 6 are provided so as to cover both sides.
Each solid guard 6 is formed by arranging a sheet material 62 having an elastic member 61, and the free edge 63 of each solid guard 6 is longer than the base end (not shown) in the longitudinal direction of the diaper 1. The base end is formed by adhering and fixing the sheet material 62 to the top sheet 2 above the absorbent body 4. Each of the two sheet materials 62 extends so that the edge opposite to the free edge 63 is positioned outward from the side edge 4a of the absorbent body 4, and the extending portion is the leakproof sheet 3. The pair of side flap portions 7 and 7 are formed on the left and right side portions of the diaper 1.
[0008]
Further, a landing tape (not shown) for fixing the fastening tape 71 is provided at a substantially central portion on the outer surface of the abdominal side portion B disposed on the abdomen side of the wearer when worn.
Here, as the fastening tape 71, a tape in which a normal adhesive is applied to form a fastening portion 71 a on a normal tape base material, a “magic tape” (trade name, manufactured by Kuraray Co., Ltd.), etc. The tape etc. by which the male member of this mechanical fastener is arranged and the fastening part 71a is formed are used. Further, as the landing tape, when the fastening part 71a is formed by the adhesive part, a tape subjected to a normal peeling process is used, and the fastening part 71a is formed by the male member. If it is, a female member of a normal mechanical fastener, a non-woven fabric having a high engagement property, or the like is used. In addition, as a forming material of the surface sheet 2, the leak-proof sheet 3, the absorber 4, the outer layer sheet 5, the elastic member 61, and the sheet material 62, generally known materials can be used without particular limitation.
[0009]
Thus, in the present disposable diaper, the first back side elastic portion 10A and the second back side elastic portion 10B are respectively positioned on the left and right outer sides of the side edges 4a and 4a of the absorber 4, as shown in FIG. A pair of side elastic portions 11, 11 and a pair of side elastic portions 11, 11, and a central connecting portion 12 located between the side elastic portions 11, 11. The side elastic portion 11 of the first back elastic portion 10A includes A plurality of waistline elastic members 21 are fixed in an expanded state so as to exhibit elastic elasticity, and a plurality of waist elastic members 22 are provided on the side elastic portions 11 of the second back side elastic portion 10B. These are fixed in an extended state so as to express elastic elasticity.
[0010]
Here, the left and right outer sides of the absorbent body mean to include the left and right outer sides of the extension line extending in the longitudinal direction of the diaper, and the side elastic part is an elastic member that elastically expands and contracts. It means a region that is fixed in an extended state so as to exhibit sex and is located on the left and right outer sides of both side edges of the absorber. Moreover, waist part A2 is a part distribute | arranged around a wearer's waist at the time of diaper wear, and usually means in the range within 10% of the diaper full length from the longitudinal direction edge part of a diaper, More preferably Within 7%. Further, the waistline portion A1 is a portion located on the wearer's waistline (lower abdomen) when wearing the diaper, and is within a range of about 25% of the total length of the diaper from the lower end of the waist portion A2 (a band-like region having this width) ).
[0011]
As shown in FIG. 1, the waistline elastic member 21 in the side elastic portion 11 has an end portion located on the inner side in the width direction of the diaper 1 in the longitudinal direction of the diaper than an end portion located on the outer side in the width direction. It is curved and arranged so as to be located near the crotch center D. By arranging the waistline elastic member 21 in such a curved manner, it is possible to improve the fit around the legs. However, from the viewpoint of preventing leakage due to the bending of the absorbent body 4, the end portion on the inner side in the width direction of the waistline elastic member 21 located closest to the crotch center D in the longitudinal direction of the diaper is the entire length of the diaper from the crotch center D. It is preferable that the distance is 20% or more. That is, the distance L between the end of the waistline elastic member 21 and the crotch center D is preferably 20% or more of the total length of the diaper.
[0012]
The waistline elastic members 21, 21.. Are sandwiched between the auxiliary sheet 23 for fixing the elastic member and the leak-proof sheet 3 or the outer layer sheet 5 in the side elastic part 11 in an extended state. In the communication part 12, it is arrange | positioned in the natural state, without being fixed between the surface sheet 2 and the absorber 4. FIG. Further, the waist elastic members 22, 22. Are sandwiched and fixed in an extended state between the sheet material 62 and the leak-proof sheet 3 or the outer layer sheet 5 in the side elastic part 11. In, the surface sheet 2 and the leak-proof sheet 3 are arranged in a natural state without being fixed.
[0013]
A non-elastic portion 12A in which the waist elastic portion 21 does not exhibit elastic stretchability is formed at a portion where the absorber 4 is present in the central connecting portion 12 of the first back side elastic portion 10A. In the central communication part 12 of the elastic part 10B, a non-elastic part 10B in which the waist elastic member 22 does not exhibit elastic stretchability is formed at a position positioned in the longitudinal direction of the absorber 4.
[0014]
Specifically, the end portions 21a and 22a and the center portions 21c and 22c on the outer side in the width direction of the diaper 1 of both elastic members 21 and 22 are fixed to the diaper constituent members in an extended state, and the side elastic portion 11 is fixed. However, the end portions 21b and 22b on the diaper width center C side of both elastic members 21 and 22 are arranged so as not to exhibit elastic stretchability. The elastic members 21, 22 have end portions 21b, 22b arranged so as not to exhibit elastic stretchability, and a portion of the central portion in the width direction of the absorber where no elastic member is arranged. Inelastic portions 12A and 12B in which the elastic members 21 and 22 do not exhibit elastic stretchability are formed in the portions where the absorber 4 of the central connecting portion 12 exists in each of the portion A1 and the waist portion A2.
[0015]
In the present invention, “the elastic member does not exhibit elastic stretchability” means (1) the elastic member is not provided at that portion, and therefore, the elastic stretchability is not expressed. (2) The elastic member is provided. However, because it is arranged in a natural state without being fixed, the elastic stretchability is not expressed, and (3) The elastic member is fixed in a state where it cannot be elastically expanded and contracted, so the elastic stretchability is expressed. The non-elastic portions 12A and 12B in the present embodiment include the portion that does not exhibit elastic stretchability by the above (1) and the elastic stretchability by the above (2), as described above. It consists of parts that do not.
[0016]
Inelastic parts 12A and 12B in this embodiment are formed in the central part of the width direction of a diaper. The width W1 (see FIG. 2) of both the inelastic portions 12A and 12B prevents the absorber from bending and twisting, and improves the fit and leakage prevention performance during mounting. Is preferably 50% or more and 200% or less, particularly preferably 90% or more and 150% or less.
[0017]
In the diaper 1 of this embodiment, since the inelastic portions 12A and 12B are formed in the central connecting portion 12 in this manner, the vicinity of the central portion in the width direction of the absorber is substantially bent even when worn. Absent.
[0018]
In addition, although both the elastic members 21 and 22 in this embodiment are distribute | arranged so that the side elastic part 11 and the non-elastic part 12 may be straddled, the site | part in which the absorber 4 exists in both elastic members 21 and 22 Alternatively, the end portions 21b and 22b disposed in the upper part of the absorbent body 4 in the longitudinal direction are disposed in a manner that does not exhibit elastic stretchability, and therefore are adjacent to the absorbent body 4 or the absorbent body 4. Does not cause deformation or deformation due to the sheet material to be used.
[0019]
The pair of side elastic portions 11, 11 is positioned on the left and right outer sides than the base end of the balancer guard 6 from the viewpoint of preventing the absorber 4 and the sheet material adjacent to the absorber 4 from being twisted or deformed. It is preferable. That is, it is preferable that the elastic member is not fixed in an extended state inside both base ends. With such a configuration, it is possible to particularly effectively prevent the occurrence of leakage when both side edges 4a and 4a of the absorber 4 are located inward of the base portion.
The elastic members 21 and 22 in the first and second dorsal elastic parts are symmetrically arranged with respect to the center line extending in the longitudinal direction of the diaper 1.
[0020]
Further, the waistline elastic member 21 and the waist elastic member 22 are fixed portions formed by fixing end portions 21a and 22a on the outer side in the width direction of the diaper and fastening tape 71 on the side portion of the back side portion A, respectively. 71b. That is, the end portions 21a and 22a of the waistline elastic members 21 and 21 and the waist elastic members 22 and 22 are arranged between the tape base material of the fastening tape 71 and the sheet material 62 at the fixing portion 71b. It is pinched and fixed.
[0021]
Here, as the waistline elastic member 21 and the waist elastic member 22, a wide belt (including flat rubber), a thin film, a foam material, or the like is used in addition to a linear one such as a rubber thread. In addition to natural rubber, synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, and elastic materials such as EVA, stretchable polyolefin, and urethane are particularly limited as materials for forming both elastic members. Can be used.
[0022]
Although the manufacturing method of the disposable diaper 1 of this embodiment is not specifically limited, For example, it can manufacture efficiently with the manufacturing method of the following absorbent article.
That is, a method for manufacturing an absorbent article comprising a supply fixing step, a cutting step after the supply fixing step, and an arrangement step after the cutting step, wherein the seat constituting the back side portion A in the supply fixing step The elastic members 21 and 22 are supplied to the material in an expanded state, and a part of the elastic members 21 and 22 is fixed to the sheet material. In the cutting step, the elastic members 21 and 22 are cut at portions that are not fixed to the sheet material. And in the said arrangement | positioning process, this sheet material to which this elastic member 21 and 22 was fixed is arrange | positioned in the predetermined location of an absorbent article, and an absorbent article is obtained.
[0023]
In addition, the said sheet material is a sheet material which forms a part of back side part A, for example, is the surface sheet 2, the leak-proof sheet 3, the outer layer sheet 5, or a laminated sheet in which a plurality of these are laminated. The parts fixed to the sheet material in the supply fixing process are the center portions 21c and 22c of the elastic members 21 and 22 and the end portions 21a and 22a on the outer side in the diaper width direction, and the sheet material to be cut in the cutting process. The portions that are not fixed to the portions are the portions that become the end portions 21 b and 22 b on the central portion C side of the diapers of the elastic members 21 and 22. According to the manufacturing method of such an absorbent article, the disposable diaper of the said embodiment can be produced efficiently. Regarding the production method, points that are not particularly explained can be performed in the same manner as in the production of a conventional absorbent article or according to each step in the production of a conventional absorbent article. For example, the arranging step can be performed according to the method described in JP-A-10-179635.
[0024]
The disposable diaper 1 of this embodiment can be used in the same manner as a normal unfolded disposable diaper.
In the disposable diaper 1 of the present embodiment, the first back side elastic portion 10A that gives the waistline portion A1 stretchability in the width direction is composed of a pair of side elastic portions 11, 11 and a central connecting portion 12, and the central communication Since the portion 12 has the non-elastic portion 12A, it is effectively prevented that the absorber 4 or the sheet material disposed adjacent to the absorber 4 due to the shrinkage stress of the elastic member is deformed or out of shape.
[0025]
Moreover, since a back side part fits well along the shape of a wearer's buttocks at the time of wear, there is no sagging of a back side part like in the conventional diaper, and it becomes a clean appearance. Thereby, even if clothes such as overpants are put on the diaper, a clean appearance is obtained, and the wearing feeling and leakage prevention properties are also improved.
Furthermore, when the diaper is worn, the back side portion A is easily spread in a flat shape, so that it is very easy to wear on the wearer.
[0026]
Moreover, since the waist part elastic member 22 is distribute | arranged by the 2nd back side elastic part 10B formed in the waist part with the same aspect, it is more excellent in fit property and leak-proof property.
[0027]
Further, since the waistline elastic member 21 and the waist elastic member 22 are respectively connected to a fixing portion 71b formed by fixing the fastening tape 71, the fit property and the ease of mounting on the buttocks of the wearer are further improved. ing.
[0028]
In addition, the disposable diaper of this invention is not restrict | limited to the above-mentioned form, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, another elastic member may be disposed on the back side A within a range that does not impair the effects of the present invention.
[0029]
FIG. 5 shows another embodiment of the present invention, in which a sheet material 82 having a three-dimensional guard elastic member 81 is arranged on the back side A to form a back three-dimensional guard 8, and the three-dimensional guard The elastic member 81 is a deployable disposable diaper that is arranged so as to cross the absorbent body 4 in the width direction and is substantially separated from the topsheet 2 at a portion that crosses the absorbent body 4. Here, “substantially spaced” means that the surface sheet 2 may be brought into contact with the surface sheet 2 to such an extent that no gathers or twists are formed.
[0030]
Both ends of the three-dimensional guard elastic members 81, 81 in the diaper shown in FIG. 5 are connected to a fixing portion 71b formed by fixing a fastening tape 71 to the side portion of the back side portion A, respectively. Here, as the three-dimensional guard elastic member 81, the same one used for the waistline elastic member 21 or the waist elastic member 22 can be used without particular limitation.
[0031]
According to such a disposable diaper, since the back three-dimensional guard 8 is formed on the back side A and the three-dimensional guard elastic member 81 is substantially separated from the surface sheet 2, the absorbent body 4 and the absorption Without causing the sheet material adjacent to the body 4 to lose its shape, deformation, etc., sufficient stretchability can be obtained in the back side portion A, and excellent fit and leakage resistance can be obtained.
[0032]
Also, the central connecting portion 12 of the first and second back-side elastic portion 10A, 10B in the above embodiment, respectively, the entire area of the diaper width direction inelastic portion 12A, is a 12B, respectively, in the width direction Only a part may be an inelastic part. Further, each of the waistline elastic member 21 and the waist elastic member 22 may have a portion that does not exhibit elastic stretchability in a portion located on the outer side of both side edges of the absorber. You may have the part which expresses elastic stretching property in the part located inward. Further, the waistline elastic member 21 and the waist elastic member 22 arranged on the first and second back-side elastic portions 10A and 10B may be plural or single, respectively. The present invention can be applied to incontinence pads, sanitary napkins and the like in addition to disposable diapers for babies and adults.
[0033]
【The invention's effect】
The absorbent article of the present invention is not easily deformed or deformed by the absorbent body or the sheet material adjacent to the absorbent body, is easy to mount, and has excellent fit and leakage prevention performance.
[Brief description of the drawings]
FIG. 1 is a partially cutaway plan view of a disposable diaper according to an embodiment of the present invention as viewed from the surface sheet side in a tension state.
FIG. 2 is an enlarged explanatory view schematically showing a main part of the disposable diaper of FIG. 1;
3 is a cross-sectional view taken along the line XX of FIG. 1. FIG.
4 is a cross-sectional view taken along the line YY of FIG. 1. FIG.
5 is a cross-sectional view showing a main part of a disposable diaper according to another embodiment of the present invention, FIG. 5 (a) is a view corresponding to FIG. 3, and FIG. 5 (b) is a view corresponding to FIG. It is.
[Explanation of symbols]
1 Absorbent article (disposable diaper)
2 Surface sheet 3 Leak-proof sheet 4 Absorber 5 Outer layer sheet 8 Back side three-dimensional guard 10A 1st back side elastic part (back side elastic part)
10B 2nd back side elastic part (2nd back side elastic part)
11 side elastic part 12 center connecting part 12A, 12B non-elastic part 21 waist part elastic member 22 waist elastic member A back side part A1 waist part A2 waist part B ventral part

Claims (5)

A liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent body, are substantially vertically long, and have absorbent articles on the waist part located around the wearer's waist on the back side. In the absorbent article in which the waist elastic part is arranged along the width direction of the back and the back elastic part is formed,
The dorsal elastic part is composed of a pair of side elastic parts located on the left and right outer sides of the both side edges of the absorber, and a central connecting part located between the pair of side elastic parts. The waistline elastic member is fixed in a stretched state so as to exhibit elastic stretchability, and the waistline elastic member is elastically stretchable at a portion of the central connecting portion where the absorber is present. inelastic portion is formed which does not express,
The waist part elastic member is arranged along the width direction of an absorptive article in the waist part located in the circumference of a wearer's waist in the back side part, and the 2nd back side elastic part is formed,
The second back side elastic portion includes a pair of side elastic portions positioned on the left and right outer sides of both side edges of the absorber, and a center connecting portion positioned between the pair of side elastic portions, The waist elastic member is fixed in a stretched state to the elastic elastic portion so as to exhibit elastic stretchability, and in the central connecting portion, the portion where the absorber exists or the upper side in the longitudinal direction of the absorber The absorptive article in which the non-elastic part in which this waist elastic member does not express elastic elasticity is formed in the part located in . The non- elastic part in the back elastic part is formed in the central part in the width direction of the absorbent article, and the width of the non-elastic part is 50% or more and 200% or less of the width of the absorber. The absorbent article according to 1. The waist part elastic member in the side elastic part of the back elastic part has an end portion located on the inner side in the width direction of the absorbent article, and an end portion located on the outer side in the width direction of the absorbent article. The absorbent article according to claim 1 or 2, wherein the absorbent article is curved so as to be positioned closer to the crotch center in the longitudinal direction.   Fastening tape for wearing a pair of left and right diapers is provided on both side edges of the back side, and the end of the waistline elastic member is connected to a fixing portion formed by fixing the fastening tape. The absorbent article according to any one of claims 1 to 3. The absorbent article according to claim 1, wherein a sheet material having a three-dimensional guard elastic member is arranged on the back side portion to form a back three-dimensional guard .

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