Multilayer one-piece disposable diapers

Claim 2

A multilayer, one-piece, disposable diaper comprising a liquid-impervious backing layer having sufficient longitudinal and transverse dimensions for encircling the thigh and waist regions of a wearer, a fluid-absorbent pad adapted to be disposed in the perineal region of the wearer for receiving and retaining body fluids, said pad constituting the primary absorbent component, by weight, of the diaper and being superposed on said backing layer and means for providing adjustable movement between said backing layer and said pad comprising bonding means securing the fluid-absorbent pad to the backing layer over only a limited region disposed inwardly of at least two corners of said pad for permitting marginal sections of the pad which constitute at least 50% of the total pad area to move independently of the backing layer.

Claim 3

The disposable diaper according to claim 1, wherein said absorbent pad includes a central core of fluid-absorbent material disposed within a fluid-pervious cover sheet.

Claim 4

The disposable diaper according to claim 1, wherein said absorbent pad has a medial region of a narrower transverse dimension than forward and/or rearward regions thereof.

Claim 5

The disposable diaper according to claim 1, wherein said absorbent pad is bonded to said backing layer with a pressure sensitive adhesive.

Claim 6

The disposable diaper according to claim 1, wherein said limited bonded region is provided by a single spot bond located inwardly of all marginal edges of the pad.

Claim 7

The disposable diaper according to claim 5, wherein said single spot bond is located at the center of the absorbent pad.

Claim 8

The disposable diaper according to claim 1, wherein said backing layer comprises an outer sheet of a liquid-impervious material and an inner sheet composed of a soft, fibrous material.

Claim 9

The disposable diaper according to claim 1, wherein said backing layer is provided with adhesive closure means for securing the diaper about a wearer.

Claim 10

The disposable diaper according to claim 1, wherein the absorbent pad has smaller longitudinal and transverse dimensions than the backing layer.

Claim 11

The disposable diaper according to claim 1, wherein said limited bonded region is along a line which either defines or intersects the horizontal or vertical center line of the absorbent pad.

Claim 12

The disposable diaper according to claim 10, wherein said bonding line is along the vertical center line of the absorbent pad.

Claim 13

The disposable diaper according to claim 10, wherein said bonding line is along the horizontal center line of the absorbent pad.

Claim 14

The disposable diaper according to claim 10, wherein said bonding line is a horizontal line disposed rearwardly of the horizontally extending center line of the absorbent pad.

Claim 15

A multilayer, one-piece disposable diaper comprising a liquid-impervious backing layer having sufficient longitudinal and transverse dimensions for encircling the thigh and waist regions of a wearer, a fluid-absorbent pad adapted to be disposed in the perineal region of the wearer for receiving and retaining body fluids, said pad having a longitudinal dimension provided by opposed end margins and being superposed on the backing layer with its end margins disposed on opposite sides of the transverse medial line of the backing layer and means for providing adjustable movement between said backing layer and said pad comprising bonding means securing the pad to the backing layer over only a limited region disposed inwardly of at least two corners of said pad which are disposed on opposite sides of the transverse medial line of the backing layer for permitting marginal sections of the pad constituting at least about 50% of the total pad area to move independently of the backing layer.

Claim 16

A multilayer, one-piece disposable diaper comprising a liquid-impervious backing layer having sufficient longitudinal and transverse dimensions for encircling the thigh and waist regions of a wearer, a fluid-absorbent pad adapted to be disposed in the perineal region of the wearer for receiving and retaining body fluids, said pad having a longitudinal dimension provided by opposed end margins and being superposed on the backing layer with its end margins disposed on opposite sides of the transverse medial line of the backing layer and means for providing adjustable movement between said backing layer and said pad comprising bonding means securing the pad to the backing layer over only a limited region disposed inwardly of at least two corners of said pad which are disposed on opposite sides of the transverse medial line of the backing layer for permitting marginal sections of the pad constituting at least about 50% of the total pad area to move independently of the backing layer.

Claim 17

The disposable diaper according to claim 14, wherein said fluid-absorbent pad constitutes the primary absorbent component, by weight, of the diaper.

Claim 18

The disposable diaper according to claim 14, wherein said limited bonded region is provided by a single spot bond located inwardly of all marginal edges of the pad.

Claim 19

The disposable diaper according to claim 16, wherein said single spot bond is located at the center of the absorbent pad.

Claim 20

The disposable diaper according to claim 14, wherein said backing layer comprises an outer sheet of a liquid-impervious material and an inner sheet composed of a soft, fibrous material.

Claim 21

The disposable diaper according to claim 14, wherein said bonding means is a line along the vertical center line of the absorbent pad.

Claim 22

The disposable diaper according to claim 14, wherein said bonding means is a line along the horizontal center line of the absorbent pad.

Claim 23

The disposable diaper according to claim 14, wherein said bonding means is a horizontal line disposed rearwardly of the horizontally extending center line of the absorbent pad.