Sanitary article having multi-layered absorbent member

BACKGROUND OF THE INVENTION

This invention relates to a sanitary article such as a disposable diaper, a sanitary napkin or a body fluid absorbent pad for incontinence which includes a multi-layered absorbent member.

Japanese Patent Application Publication No. 1997-253259A describes a disposable diaper comprising a liquid-pervious topsheet, a liquid-impervious backsheet and upper and lower liquid-absorbent panels both disposed between the topsheet and the backsheet. The upper liquid-absorbent panel is formed with a plurality of openings extending through this panel in a direction of its thickness. This diaper is described as being capable of preventing any amount of excretion discharged thereon from staying on the topsheet by receiving the entire amount of excretion in the respective openings formed on the liquid-pervious topsheet and then transferring this into the upper and lower liquid-absorbent panels.

With the diaper disclosed in the publication, excretion discharged thereon merely spreads within the respective panels as widely as possible in the course being absorbed by these panels. In other words, the extent over which excretion is absorbed by the panels is disadvantageously limited to the position at which excretion has been discharged on the diaper. Depending on a capacity of the diaper, excretion discharge focussed or localized may cause a certain amount of excretion to stay on the topsheet or in a limited zone, particularly in some of the openings of the panels. In this case, the amount of excretion once received in the openings may flow back toward the topsheet as the panels are compressed under a wearer's body weight.

SUMMARY OF THE INVENTION

An object of this invention is to provide a sanitary article having a multi-layered absorbent member designed so that excretion discharged thereon may rapidly spread as widely as possible to prevent any amount of excretion from staying on a topsheet or in the limited zone of the article and thereby to prevent excretion once absorbed in the article from flowing back toward the topsheet.

According to this invention, there is provided a sanitary napkin having multi-layered absorbent member comprising, a panel made of a fibrous web having a compressive recovery elasticity, a plurality of openings extending through the panel in a thickness direction thereof and spaced one from another in a direction orthogonal to the thickness direction and a plurality of fibrous assembly regions extending between each pair of adjacent the openings.

The article further comprises the panel including two or more individual panels stacked one on another in the thickness direction each having a plurality of openings out of alignment with the corresponding openings in the individual panel immediately underlying the precedent individual panel and each of the openings in the precedent individual panel being divided in two or more sections by the fibrous assembly regions.

The multi-layered absorbent member according to this invention makes it possible to deflect the flowing direction of excretion by the fibrous assembly ribs (fibrous assembly regions) while the flow of excretion is successively absorbed by the respective panels so that excretion may spread as widely as possible from the top panel toward the bottom panel. In this way, the entire volume of the absorbent member can be efficiently utilized. Even if excretion is discharged onto a limited spot of the absorbent member, it is not apprehended that a certain amount of excretion might stay in or on this spot of the absorbent member since the discharged amount of excretion can rapidly spread within the absorbent member and is uniformly absorbed therein.

The absorbent member in which the total opening area of the openings progressively increases from the top panel toward the bottom panel can effectively avoid undesirable back flow of excretion even when the absorbent member is compressed in the direction of its thickness. This is because the total opening area of the openings progressively decreases from the bottom panel toward the top panel and the density of the fibrous assembly ribs in the respective panels correspondingly increases in this direction.

The absorbent member in which the fiber density progressively decreases from the top panel toward the bottom panel is effective particularly for high viscosity excretion such as loose passage or menstrual discharge since the absorption capacity for such high viscosity excretion progressively increases from the top panel toward the bottom panel so that the flow of excretion may be rapidly moved downward in the absorbent member.

The absorbent member being able to utilize the entire volume thereof is suitable particularly as the important component of the sanitary article such as the liquid-absorbent pad for incontinence control.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1

is a perspective view depicting one embodiment of a partially cutaway multi-layered absorbent member for a sanitary article according to this invention;

FIG. 2

is a diagram schematically illustrating a manner of penetration, spreading and absorption in the multi-layered absorbent member;

FIG. 3

is a perspective view depicting a partially cutaway disposable diaper adopting the multi-layered absorbent member depicted by

FIG. 1

;

FIG. 4

is a sectional view taken along line A—A in

FIG. 3

;

FIG. 5

is a perspective view depicting a sanitary napkin adopting the multi-layered absorbent member depicted by

FIG. 1

; and

FIG. 6

is a sectional view taken along line B—B in FIG.

5

.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Details of a sanitary article having a multi-layered absorbent member will be more fully understood from the description given hereunder with reference to the accompanying drawings.

FIG. 1

is a perspective view depicting one embodiment of partially cutaway a multi-layered absorbent member

1

for a sanitary article according to this invention and

FIG. 2

is a diagram schematically illustrating a manner of penetration, spreading and absorption in the multi-layered absorbent member

1

. An arrow Y in

FIG. 2

indicates a direction in which excretion flows.

The multi-layered absorbent member

1

comprises a plurality of panels P made of a fibrous web having a compressive recovery elasticity and contoured by longitudinally opposite ends

1

a

extending parallel to each other transversely of the panels P and transversely opposite side edges

1

b

extending parallel to each other longitudinally of the panel P.

More specifically, the absorbent member

1

comprises four panels P stacked in a direction of their thickness so that a first panel p

1

defines a top layer, a fourth panel p

4

defines a bottom layer and second panel p

2

and third panel p

3

define intermediate layers disposed between the first and fourth panels p

1

, p

4

.

Each of the panels p

1

˜p

4

has a plurality of square openings H extending through the panel in the direction of its thickness and spaced one from another obliquely with respect to the longitudinally opposite ends

1

a

as well as to the transversely opposite side edges

1

b

of the absorbent member

1

and a fibrous assembly rib R (fibrous assembly region) surrounding the respective openings H.

The rib R in each of the panels p

1

˜p

4

comprises a plurality of first fibrous assembly ribs r

1

and a plurality of second fibrous assembly ribs r

2

, the first fibrous assembly ribs r

1

obliquely extending parallel to and spaced from one to another between respective pairs of the adjacent openings H and the second fibrous assembly ribs r

2

being oriented orthogonally to the first fibrous assembly ribs r

1

. The second fibrous assembly ribs r

2

also obliquely extend parallel to and spaced from one another between the respective pairs of the adjacent openings H.

The opening H in each of these panels p

1

˜p

4

is defined by a pair of the adjacent first ribs r

1

and a pair of the adjacent second ribs r

2

intersecting the pair of the adjacent first ribs r

1

. These panels p

1

˜p

4

are bonded together in their overlapping regions using suitable adhesive or a heat-sealing technique.

The openings H of the overlying panel P are out of alignment with the openings H of the other panel P immediately underlying the overlying panel P and the openings H of the former are respectively divided in two or more sections by the rib R of the latter. Specifically, the openings h

1

of the first panel p

1

are respectively divided in two or more sections by the first and second ribs r

1

, r

2

of the second panel p

2

, the openings h

2

of the second panel p

2

are respectively divided in two or more sections by the first rib r

1

and the second rib r

2

of the third panel p

3

, and the openings h

3

of the third panel p

3

are respectively divided in two or more sections by the first rib r

1

and the second rib r

2

of the fourth panel p

4

. In this manner, the openings H of the overlying panel P should be divided in at least two sections by the rib R of the other panel P immediately underlying the overlying panel P.

A total opening area of the openings H in the overlying panel P and a total opening are of the openings H in the other panel P immediately underlying panel P are in the relationship of the former<the latter. In other word, the total opening areas of the respective panels p

1

˜p

4

progressively enlarge from the first panel p

1

toward the fourth panel p

4

. However, it is possible without departing from the spirit and the scope of this invention to dimension the total opening areas of the respective panels p

1

˜p

4

to be uniform.

As schematically illustrated by

FIG. 2

, excretion flows into the absorbent member

1

through the openings h

1

of the first panel p

1

while partially absorbed by the first panel p

1

. A flow of excretion having reached the first rib r

1

and the second rib r

2

of the second panel p

2

dividing the openings h

1

of the first panel p

1

is now divided by these first rib r

1

and the second rib r

2

into the respective openings h

2

of the second panel p

2

while partially absorbed by the second panel p

2

. A flow of excretion having reached the first rib r

1

and the second rib r

2

of the third panel

3

dividing the openings h

2

of the second panel p

2

is then divided by these first and second ribs r

1

, r

2

of the third panel

3

into the respective openings h

4

of the fourth panel p

4

while partially absorbed by the third panel

3

. An amount of excretion which has not been absorbed by the first˜third panels p

1

˜p

3

is absorbed by the fourth panel p

4

.

The flow of excretion has its direction successively deflected by the first rib r

1

and the second rib r

2

of the respective panels p

1

˜p

4

while gradually absorbed by these panels p

1

˜p

4

so that the flow of excretion may rapidly spread from the first panel p

1

toward the fourth panel p

4

.

Even when the absorbent member

1

is compressed by the wearer's body weight in the direction of its thickness, no movement of excretion from the bottom to the top of the absorbent member

1

since the total opening area of the openings H progressively decreases and the density of the rib R of the panel P increases from the fourth panel p

4

toward the panel p

1

.

The total opening area of the openings H formed in the panel P is in a range of 15˜1300 mm

2

and a ratio of the total opening area of the opening H to the total surface area of the panel H is in a range of 20˜80%.

The total opening area of the openings H less than 15 mm

2

is too small to guide a flow of excretion smoothly into the absorbent member and, if the flow is guided into the absorbent member, the correspondingly dense rib R would obstruct the flow of excretion from rapidly spreading within the absorbent member

1

. On the other hand, the total opening area of the openings H larger than 1300 mm

2

would cause excretion once absorbed by the absorbent member

1

to flow back toward the top surface of the absorbent member

1

through the openings H as the absorbent member

1

is compressed under the wearer's body weight. The area ratio of the openings H lower than 20% will be insufficient to spread excretion within the absorbent member as widely as possible and would cause a certain amount of excretion to stay on the top surface of the absorbent member

1

. On the other hand, the area ratio of the openings H exceeding 80% would inevitably make the density of the rib R too low and unacceptably reduce the absorptive capacity of the panels p

1

˜p

4

.

A fiber density of the rib R in the overlying panel P and a fiber density of the rib R in the panel P immediately underlying the overlying panel P are in the relationship of the former>the latter. In other words, the fiber density of the rib R progressively decreases from the first panel p

1

toward the fourth panel p

4

. However, it is possible without departing from the spirit and the scope of this invention to provide the respective panels p

1

˜p

4

with a uniform fiber density.

The absorbent member

1

of this invention appropriately functions also for excretion having a relatively high viscosity, for example, loose passage or menstrual discharge. In the absorbent member

1

, excretion of the type is not easily absorbed by the first panel p

1

and rapidly moves from the first panel p

1

toward the fourth panel p

4

since the absorption capacity of the rib R for excretion of this type progressively increases from the second panel p

2

toward the fourth panel p

4

.

An example of the process for making the panel P comprises steps of air laying short fibers once dispersed in the air on a conveyor provided thereon with a plurality of pins shaped in conformity of the desired openings H of the panel P to form fibrous web and subjecting the fibrous web on the conveyor to hot air blast to heat-seal the short fibers together.

Another example of the process for making the panel P comprises steps of discharging molten thermoplastic synthetic resin from a spinning nozzle array and simultaneously jetting air streams from gas injectors arranged on both sides of the spinning nozzle array so that the air streams may spin the synthetic resin being discharged from the nozzle array into superfine fibers; collecting these superfine fibers on a meshy conveyor provided below the nozzle array so that the superfine fibers intertwined and collected on the meshy conveyor are bonded together under heat of these superfine fibers themselves to form fibrous web; and finally compression-molding the fibrous web by a pair of pressure rollers to a substantially uniform thickness before the fibrous web is cooled to a desired thickness or after the fibrous web has been cooled.

The fiber forming the fibrous web may be selected from a group including polyolefine fiber such as polypropylene fiber and polyethylene fiber, polyester fibers such as polyethylene terephtalate fiber and polybutylene terephtalate fiber, polyamide fiber such as nylon 66 fiber and nylon 6 fiber, acryl fiber, cellulose fiber such as pulp fiber, rayon fiber and acetate fiber, and superabsorption polymer fiber. It is also possible to disperse and hold superabsorption polymer grains in fiber interstices of the fibrous web.

As a general rule, the panel P forming with the absorbent member

1

comprises two, three, four or more layers of the individual panels stacked one on another so far as each opening H of each overlying panel P is divided in at least two sections by the rib R of the panel P immediately underlying the overlying panel P. The openings H of the absorbent member

1

are not limited to the square shaped openings but may be of circular, oval, rectangular, triangular or the other shape.

FIG. 3

is a perspective view showing the disposable diaper as a specific example of the sanitary napkin adopting the multi-layered absorbent member

1

shown by

FIG. 1

as partially broken away and

FIG. 4

is a sectional view taken along a line A—A in FIG.

3

. The diaper

10

comprises a liquid-pervious topsheet

11

, a liquid-impervious backsheet

12

and the multi-layered absorbent member

1

disposed between the topsheet

11

and the backsheet

12

. The diaper

10

is longitudinally configured by a front waist region

13

, a rear waist region

15

and a crotch region

14

extending between the front and rear trunk regions

13

,

15

. The diaper

10

is contoured by longitudinally opposite ends

10

a

extending in parallel to each other transversely of the diaper

10

and transversely opposite side edges

10

b

extending in parallel to each other longitudinally of the diaper

10

. In the crotch region

14

, the side edges

10

b

curve inwardly of the diaper

10

so as to describe circular arcs, respectively. The diaper

10

further comprises a pair of liquid-resistant leak-barrier cuffs

16

longitudinally extending in parallel to and spaced from each other along the side edges

10

b,

respectively.

The absorbent member

1

comprises the first˜fourth panels p

1

˜p

4

stacked one on another in the thickness direction of the absorbent member

1

each having the first and second fibrous assembly ribs r

1

, r

2

and a plurality of openings H surrounded by the first and second fibrous assembly ribs r

1

, r

2

. These panels p

1

˜p

4

are bonded together in their regions in which the first and second ribs r

1

, r

2

of the respective panels p

1

˜p

4

overlap one another.

A liquid-absorbent core

17

in the form of mat having no opening underlies the fourth panel p

4

. The absorbent member

1

is fixed to the diaper

10

by bonding the first panel p

1

to the inner surface of the topsheet

11

. The core

17

is bonded to respective inner surfaces of the fourth panel p

4

and the backsheet

12

.

Along the longitudinally opposite ends

10

a

of the diaper

10

, transversely extending film-like elastic members

18

associated with a waist-hole are disposed between the topsheet

11

and the backsheet

12

and bonded under tension to the inner surface of at least one of these sheets

11

,

12

. Along the transversely opposite side edges

10

b,

longitudinally extending thread-like elastic members

19

associated with leg-holes are bonded under tension to the diaper

10

in the manner similar to the elastic members

18

. In the rear waist region

15

, respective proximal ends of tape fasteners

2

are attached to the transversely opposite side edges

10

b

of the diaper

10

so that these tape fasteners

20

extend inward transversely of the diaper

10

. In the front waist region

13

, a rectangular target tape strip (not shown) is attached to the outer surface of the backsheet

12

so that the respective tape fasteners

20

may be anchored on the target tape strip.

The leak-barrier cuffs

16

lie immediately outside the transversely opposite side edges

1

b

of the absorbent member

1

. Each of these leak-barrier cuffs

16

has a fixed side edge portion

16

a

firmly bonded to the outer surface of the topsheet

11

and extending longitudinally of the diaper

10

, a free side edge portion

16

b

extending inward from the fixed side edge portion

16

a

transversely of the diaper

10

in the crotch region

14

and normally biased to rise on the diaper

10

and a longitudinally opposite fixed end portions

16

c

collapsed inward transversely of the diaper

10

and bonded to the outer surface of the topsheet

11

in the collapsed state in the front and rear waist regions

13

,

15

. An elastically stretchable member

21

is bonded under tension to the free side edge portion

16

b

of the leak-barrier cuff

16

so that the member

21

may extend longitudinally of the diaper

10

and covered with a marginal part of the free side edge portion

16

b.

Referring to

FIG. 3

, the elastic members

18

,

19

,

21

are relieved of their tension, resulting in that the diaper

10

is longitudinally curved with its inner surface inside and gathers are formed along the longitudinally opposite ends

10

a

as well as the transversely opposite side edges

10

b

and along the respective free side edge portions

16

b

of the leak-barrier cuffs

16

. Consequently, the topsheet

11

cooperates with the leak-barrier cuffs

16

to for a pair of pockets opening inward transversely of the diaper

10

.

The tape fasteners

20

are anchored on the target tape strip by means of pressure-sensitive adhesive applied on respective inner surfaces of the tape fasteners' free end portions to form the pair of leg-holes and the waist-hole (not shown).

In the diaper

10

, transversely opposite side edge portions

11

a

of the topsheet

11

extend outward transversely of the diaper

10

slightly beyond the transversely opposite side edges

1

b

of the absorbent member

1

. Transversely opposite side edge portions

12

a

of the backsheet

12

as well as respective outer edge portions

16

d

of the leak-barrier cuffs

16

extend outward transversely of the diaper

10

beyond the side edge portions

11

a

of the topsheet

11

. The outer side edge portion

11

a

of the topsheet

11

is disposed between the side edge portion

12

a

of the backsheet

12

and the adjacent outer edge portion

16

d

of the cuff

16

and firmly bonded to the inner surface of at least one of the backsheet

12

and the leak-barrier cuff

16

. The side edge portion

12

a

of the backsheet

12

and the adjacent outer edge portion

16

d

of the leak-barrier cuff

16

are put flat and firmly bonded together. The elastic member

19

associated with the leg-hole is disposed between the side edge portion

12

a

of the backsheet

12

and the adjacent outer edge portion

16

d

of the leak-barrier cuff

16

and bonded under tension to the inner surface of at least one of the backsheet

12

and the leak-barrier cuffs

16

.

In the vicinity of the longitudinally opposite ends

10

a

of the diaper

10

, portions of the topsheet

11

and the backsheet

12

extending outward longitudinally of the diaper

10

beyond the longitudinally opposite ends

1

a

of the absorbent member

1

are put flat and firmly bonded together.

In the diaper

10

, the flow of excretion has its direction successively deflected by the first rib r

1

and the second rib r

2

of the respective panels p

1

˜p

4

while gradually absorbed by these panels p

1

˜p

4

so that the flow of excretion rapidly spread from the first panel p

1

toward the fourth panel p

4

. The amount of excretion which has not been absorbed by the first˜fourth panels p

1

˜p

4

is absorbed by the core

17

.

FIG. 5

is a perspective view depicting a sanitary napkin

30

as another example of the sanitary article adopting the multi-layered absorbent member

1

shown by FIG.

1

and

FIG. 6

is a sectional view taken along line B—B in FIG.

5

. The napkin

30

comprises a liquid-pervious topsheet

31

, a liquid-impervious backsheet

32

and the multi-layered absorbent member

1

disposed between the topsheet

31

and the backsheet

32

. The napkin

30

is contoured by longitudinally opposite ends

30

a

extending transversely of the napkin

30

and destined to lie back and forth with respect to wearer's shorts and transversely opposite side edges

30

b

extending longitudinally of the napkin

30

and destined to lie along the leg-holes of the wearer's shorts.

In the vicinity of the side edges

30

b,

the napkin

30

has a pair of liquid-resistant barrier flaps

33

extending in parallel to each other longitudinally of the napkin

30

and spaced from each other transversely of the napkin

30

. Substantially in the middle region of the napkin

30

, the topsheet

31

is formed with a rectangular opening

34

with its longer sides extending in parallel to the side edges

30

b

of the napkin

30

. The absorbent member

1

is exposed through this opening

34

of the topsheet

31

.

The absorbent member

1

comprises the first˜fourth panels p

1

˜p

4

stacked in a direction of their thickness. Substantially in the middle regions of the respective panels p

1

˜p

4

, the absorbent member

1

has the first and second fibrous assembly ribs r

1

, r

2

and a plurality of openings H surrounded by these ribs r

1

, r

2

. The panels p

1

˜p

4

have neither the first and second ribs r

1

, r

2

nor the openings H in the regions other than the middle regions. These panels p

1

˜p

4

are bonded one to another in their zones in which the first and second ribs r

1

, r

2

of these panels p

1

, p

2

overlap one another.

A liquid-absorbent core

35

in the form of mat having no opening underlies the fourth panel p

4

. The absorbent member

1

is fixed to the napkin

30

by bonding the first panel p

1

to the inner surface of the topsheet

31

. The core

35

is bonded to respective inner surfaces of the fourth panel p

4

and the backsheet

32

.

The barrier flaps

33

lie immediately outside the transversely opposite side edges edges

1

b

of the absorbent member

1

. Each of these barrier flaps

33

has a fixed side edge portion

33

a

firmly bonded to the outer surface of the topsheet

31

and extending longitudinally of the napkin

30

, a free side edge portion

33

b

extending outward transversely of the napkin

30

in its middle region and normally biased to rise on the napkin

30

and a longitudinally opposite fixed end portions

33

c

collapsed outward transversely of the napkin

30

and firmed bonded to the outer surface of the topsheet

31

in this collapsed state in the vicinity of the longitudinally opposite ends

30

a

of the napkin

30

. An elastically stretchable member

36

is bonded under tension to the free side edge portion

33

b

of the barrier flap

33

so that the elastic member

36

may extend longitudinally of the napkin

30

and be covered with a marginal part of the free side edge portion

33

b.

In the vicinity of the transversely opposite side edges

30

b

of the napkin

30

, portions of the topsheet

31

and the backsheet

32

extending outward transversely of the absorbent member

1

beyond the transversely opposite side edges

1

b

of the absorbent member

1

are put flat and firmly bonded together. Also in the vicinity of the longitudinally opposite ends

30

a

of the napkin

30

, portions of the topsheet

31

and the backsheet

32

extending outward longitudinally of the absorbent member

1

beyond the transversely opposite side edges

1

a

of the absorbent member

1

are put flat and firmly bonded together.

In the napkin

30

, the flow of excretion has its direction successively deflected by the first and second ribs r

1

, r

2

of the respective panels p

1

˜p

4

while gradually absorbed by these panels p

1

˜p

4

so that the flow of excretion rapidly spread from the first panel p

1

toward the fourth panel p

4

. The amount of excretion which has not been absorbed by the first˜fourth panels p

1

˜p

4

is absorbed by the core

35

.

The topsheet

11

,

31

may be formed with a liquid-pervious sheet such as nonwoven fabric or porous plastic film, preferably by a liquid-pervious hydrophilic sheet. The backsheet

12

,

32

, the leak-barrier cuffs

16

and the barrier flaps

33

may be formed with hydrophobic nonwoven fabric, liquid-impervious plastic film or a laminated sheet consisting of hydrophobic nonwoven fabric and plastic film, preferably by a breathable but liquid-impervious sheet. It is also possible to use, as the stock material for the backsheet

12

,

32

, the leak-barrier cuffs

16

and the barrier flaps

33

, composite nonwoven fabric (SMS nonwoven fabric) comprising melt blown nonwoven fabric having a high water-resistance of which the opposite sheet surfaces are sandwiched between sheet surfaces of melt blown nonwoven fabric having a high strength and a high flexibility.

The nonwoven fabric may be selected from a group including spun lace nonwoven fabric, needle punch nonwoven fabric, melt blown nonwoven fabric, thermal bond nonwoven fabric, spun bond nonwoven fabric and chemical bond nonwoven fabric. The component fiber of the nonwoven fabric may be selected from a group including polyolefine, polyester and polyamide fibers and conjugated fiber of polyethylene/polypropylene or polyester.

The core

17

,

35

may be formed with a mixture of fluff pulp and high absorption polymer grains compressed to a desired thickness and then entirely covered with a water-pervious sheet (not shown) such as tissue paper.

Bonding of the absorbent member

1

and the core

17

,

35

to the sheets

11

,

12

,

31

,

32

, fixing of the sheets

11

,

12

,

31

,

32

, the leak-barrier cuffs

16

and the barrier flaps

33

, and attaching of the elastic members

18

,

19

,

21

,

36

may be carried out using suitable adhesive such as hot melt adhesive or pressure-sensitive adhesive or a heat-sealing technique.

While the topsheet

11

,

31

has been described as the component of the diaper

10

as well as the sanitary napkin

30

, it should be understood that the topsheet

11

,

31

is not essential for these diaper

10

and napkin

30

and the absorbent member

1

may be directly exposed on the diaper

10

or the napkin

30

in the absence of the topsheet

11

,

31

.

This invention is applicable not only to the disposable diaper

10

and the sanitary napkin

30

but also to a liquid-absorbent pad for continence control.

Number	Name	Date	Kind
5478335	Colbert	Dec 1995	A
5500270	Langdon et al.	Mar 1996	A
5549589	Horney et al.	Aug 1996	A
5713881	Rezai et al.	Feb 1998	A
6241714	Raidel et al.	Jun 2001	B1

Sanitary article having multi-layered absorbent member

Information

Patent Number

Date Filed

Date Issued

Inventors

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