JP2593467B2 - Disposable diapers - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to disposable diapers with fasteners.

BACKGROUND OF THE INVENTION Problems to be Solved by the Prior Art and the Invention One common prior art uses adhesive tape to fit a diaper, especially a disposable diaper, around the wearer's waist. Further, the prior art has provided a sealing system to prevent leakage of liquid from the diaper in the area around the wearer's thighs and waist. Sealing systems that help prevent leakage in the thigh area include elastic elements, such as elastic bands or one or more elastic strands, which are attached to approximately the center of the side edges of the diaper. ing.

Sealing systems that help prevent liquid leakage at the wearer's waist include a so-called "stretchable waistband (el).
Elastic elements are attached to the upper and / or lower edge of the diaper to provide a diaper with an "asticized waistband". In the prior art, the fastening system and the sealing system are interdependent and allow relative movement between the wearer's body and the diaper itself. The sagging in this way also leads to liquid leakage, especially at the feet of the diaper.

SUMMARY OF THE INVENTION The present invention is directed to providing a fastening system for a user to better fit such a diaper around the wearer's waist, and thus to provide such a diaper. The risk of leakage is reduced by the combination of the fastening system and the resilient sealing system to prevent leakage around the thigh.

One object of the present invention is to provide a slit in such an adhesive means in one adhesive means system so that the resulting two adhesive means can act independently of each other, It is to interrupt the continuous surface of the force conduction occurring in the two bonding means.

Another object is to fit the diaper snugly around the thighs and waist so that it can be varied according to the ergonomics of the wearer and therefore only the feet can be moved without moving the diaper relative to the body. .

Another advantage is the additional option of fitting such a diaper to the body, such that each of said bonding means is used independently of one another.

The present invention relates to a liquid-impermeable backing sheet; a liquid-permeable covering sheet, the covering sheet having a surface that comes into contact with a wearer's body when using a disposable diaper; and the backing sheet and the covering sheet. An upper end portion; an upper edge portion adjacent to the upper end portion; a lower end portion; a lower edge portion adjacent to the lower end portion; a pair of side ends, each of the side ends being A horizontal axis between the upper end and the lower end and a vertical axis between the side ends, the horizontal axis and the vertical axis being a central area of the disposable diaper. At a right angle to each other; a first upper corner in a region where the upper end and the first side end intersect; and the upper end intersects with the second side end. A disposable diaper having a second upper corner in the area; A first adhesive means applied to the body-contacting surface of the covering sheet at the upper edge near each of the upper corners; And a second adhesive means applied on each of the edges to the body contacting surface of the covering sheet, each of the second adhesive means being laterally displaced from the associated first adhesive means. Spaced downwardly toward an axis, the first and second adhesive means are cut through the backing sheet and the covering sheet on each side of the disposable diaper and disposable from the associated side end Disposable diapers characterized by being separated by slits extending towards the longitudinal axis of the diaper.

The present invention further provides a liquid-impermeable backing sheet; a liquid-permeable covering sheet, the covering sheet having a surface that comes into contact with a wearer's body when using a disposable diaper; the backing sheet and the covering An upper end portion; an upper edge portion adjacent to the upper end portion; a lower end portion; a lower edge portion adjacent to the lower end portion; a pair of side end portions, each of the side end portions; Have side edges adjacent to them; a horizontal axis between the upper end and the lower end and a vertical axis between the side ends, the horizontal axis and the vertical axis are disposable diapers. A first upper corner in a region where the upper end and the first side end intersect at right angles with each other in a central region; and an upper end and a second side end intersect with each other. Disposable diaper with a second upper corner in the area where The backing sheet is affixed to the covering sheet at an edge; further, a first region of a pressure-sensitive adhesive applied at the first upper corner to the liquid-permeable covering sheet; A second region of pressure-sensitive adhesive applied to the covering sheet at the second upper corner; a second region of pressure-sensitive adhesive applied to one of the side edges and spaced a distance from the lower end toward the horizontal axis; A third region of pressure-sensitive adhesive; and a fourth region of pressure-sensitive adhesive applied to the other of the side edges and spaced a distance from the lower end toward the horizontal axis; All areas of the pressure sensitive adhesive are applied to the body contacting surface of the liquid permeable covering sheet; further comprising a pair of slits, a first slit of which is a third of the pressure sensitive adhesive. The intersection of the area with the first side end and the lower end A point on the first side end between the points extends inwardly of the diaper toward the abscissa and a second slit is formed between the fourth area of the pressure sensitive adhesive and the second side. A disposable diaper characterized in that it extends inside the diaper towards the transverse axis from a point on a second side end between the end and the intersection of the lower end.

According to the invention of the present application, the first bonding means and the second bonding means separated by the slit provided through the backing sheet and the covering sheet are separately operated so that they can be properly positioned on the backing sheet. Adhering to the diaper can have the significant effect of allowing the diaper to fit snugly around the baby's waist and around the thigh without leaking.

Embodiments The present invention may be better understood with reference to the following detailed description, taken in conjunction with the accompanying drawings.

Referring to the drawings, a liquid impermeable backing
g) a sheet 11, a liquid-permeable covering sheet 12,
A diaper having an absorbent core 22 disposed between the backing sheet and the covering sheet
10 is shown. The diaper further comprises an elastic element 13 at a central portion of each of the side edges of the diaper and an elastic element 14 in a central region of the upper edge of the diaper. Lining sheet
11 may comprise a film of polyethylene or other liquid impermeable material. The covering sheet 12 can be a non-woven fabric, highly porous paper or similar material that allows the passage of liquid to the underlying absorbent core.
The absorbent core 22 may comprise, for example, finely ground wood pulp or other material having good liquid absorption. The elastic elements 13 and 14 can be elastic monofilaments or tapes of a heat-shrinkable material having elastic properties after heat-shrinkage. In the embodiment being discussed, the resilient element 14 is preferably in the form of a resilient monofilament, which, in the stretched state, between the backing sheet 11 and the covering sheet 12, as seen in FIG. Attached to When subsequently relaxed, the resilient element 14 helps to shrink the material along the upper edge of the diaper, as shown in FIGS. Elastic elements 13, 1 at opposite side edges of the diaper
3 is preferably in the form of a tape of heat-shrinkable material, which after applying heat, exhibits elastic properties. A suitably sized length of heat shrinkable material is attached to the side edge of the diaper 10 between the backing sheet 11 and the covering sheet 12, as shown in FIG. The side edge of the diaper is then heated, so that the tape of heat-shrinkable material shrinks to provide the shrunken side edge shown in FIGS. 1 and 2, which is worn during use. Around the thighs of the person.
As noted above, since the tapes have elastic properties after their heat treatment, the shrinkage at the side edges of the diaper is expandable to fit comfortably around the wearer's thigh area. Also, it provides a sealing effect for preventing liquid leakage.

It will be appreciated that the resilient element 14 may comprise more than one resilient filament, rather than the single strand illustrated in the drawings. Alternatively, said piece of heat-shrinkable tape material can be used as an elastic element 14 at the upper edge of the diaper. Similarly, a heat-shrinkable tape comprising elastic elements 13, 13 at the side edges of the diaper can be replaced by one or more elastic monofilaments. In the diaper 10 illustrated in the drawings, the absorbent core 22 is smaller in size than the backing sheet and the covering sheet, but it is understood that the absorbent core 22 can be of various sizes and shapes. Would. The absorbent core 22 can be stabilized by embossing along a line 23, as shown for example in FIG. In the diaper 10 illustrated in the drawing, a backing sheet
It will be appreciated by those skilled in the art that the 11 and the covering sheet 12 can be attached to each other, for example, at the edge of the diaper using a suitable adhesive or by heat sealing. When the backing sheet and the covering sheet are glued around the edges of the diaper in the manner just described, the absorbent core is prevented from migrating; however, the absorbent core is further down the side of the underlying backing sheet. So that it does not move against unwanted movement.

Two special bonding means, a first bonding means 15 and a second bonding means 16, are provided at the upper corner of the diaper substantially adjacent to the end of the resilient element 14 (ie the upper end 25 and the first side end). 27 at a first upper corner 30 in a region where the second end 27 intersects with a second upper corner 31) in a region where the upper end 25 and the second side end 28 cross each other.
The inner surface of the liquid permeable covering (i.e. the surface facing the reader in Fig. 3 and the diaper in contact with the wearer's body during use) is provided. As can be seen in FIG. 3, the first bonding means 15 and the second bonding means 16 are arranged symmetrically about the longitudinal axis YY of the diaper 10 near the upper corner of the diaper.

The adhesive used for the first bonding means 15 and the second bonding means 16 can be of the pressure sensitive acrylic type or any other type known in the art. Preferably, the adhesive is of a type that can be easily released from the outer surface of the backing sheet 11 without undue damage to the backing sheet or the adhesive. When this type of adhesive is used, the adhesive coated portion of the diaper is released from engagement with the backing sheet when it is desired to adjust the diaper fit or remove it from the wearer. It is easy to do. If the adhesive used for the first bonding means 15 and the second bonding means 16 cannot be released easily from the outer surface of the backing sheet, these The part can be suitably treated by methods known to those skilled in the art to provide the necessary easy release characteristics. The adhesive finally selected for use can be applied in any convenient way, for example by an adhesive transfer method.

The preferred embodiment illustrated in FIG. 3 comprises a pair of generally rectangular first adhesive means 15, one at each upper corner of the diaper. Accordingly, each of the first bonding means 15 is located at the upper edge of the diaper adjacent to the upper end 25 and adjacent to one of the opposite side ends 27, 28 of the diaper. The diaper 10 further comprises a pair of generally rectangular two adhesive means 16, each of which is downwardly spaced from the upper end 25 of the diaper and its associated first adhesive means 15. ing. Each such second bonding means 16 is located adjacent to one of the side ends 27, 28 of the diaper, as can be seen in FIG.

The first bonding means 15 and the second bonding means 16 on each side of the diaper extend from the side ends 27, 28 of the diaper towards its central region and substantially to the transverse axis XX of the diaper. It is separated by slits 17 running in parallel.

In a preferred embodiment, each slit 17 extends from its respective side edge 27, 28 to its associated bonding means 15, 1
It extends considerably inward than 6.

Each slit 17 terminates in a circular cutout 18 at its inner end, which prevents unwanted tearing of the diaper by dispersing the force applied to the diaper along such a circular surface. Help to do. As illustrated in FIG. 3, an adhesive-free area between the slit 17 and the lower end 26 of the first adhesive means 15 and the slit 17,
There is an adhesive-free area between the upper end 25 of the second adhesive means 16.

In use, the child to be diapered is placed face up on the upper surface of the generally flat shaped diaper shown in FIG. 3, so that the child's ass is located approximately in the center of the diaper. The lower part of the diaper is lifted upwards between the child's feet, so that the lower end 26 is flush with the upper end 25. First bonding means 1 at upper end 25
5 and 15 are adhered to the backing sheet 11 in a corner area where the side ends 27 and 28 intersect the lower end 26 (arrow A in FIG. 1). This action secures the diaper in place around the child's waist. The second adhesive means 16, 16 on each side of the diaper is operated to fit the diaper around the child's thigh and then firmly attached to the impermeable backing sheet 11 (arrow B in FIG. 1). Mounted. The diaper before closing the bonding means 15, 16 is illustrated on the right side of FIG. 1; the diaper after attaching the bonding means 15, 16 to the backing sheet is illustrated on the left side of FIG.

As indicated earlier in the text and as just described, the diaper of the present invention may be placed around the wearer's waist (first adhesive means 1).
The operation of closing and fastening (using 5, 15) is achieved independently of the operation of adjusting the fit (using the second bonding means 16, 16) of the diaper around the thigh, so that the diaper Can be effectively prevented from undesired leakage. In the diaper of the present invention, unidirectional movement of the wearer's feet pulls the elastic elements 13, 14 around the diaper and thigh in the same direction, and causes the diaper to follow the body. There is little relative movement between the body and the diaper. This reduces the amount of gap between the wearer and the diaper itself, thus reducing the possibility of leakage.

In another embodiment, illustrated in FIG. 2, an arcuate slit 19 similar to slit 17 separates the adhesive means on each side of the diaper, and inward from the side edges,
And extends downward and terminates near the upper end of the resilient element 13. The arcuate slit 19 terminates in a circular cutout 18, which prevents the diaper from tearing when stress is applied to the area around the slit. In this embodiment, between the first bonding means 15 and the slit 19,
Alternatively, there is no non-adhesive portion between the second bonding means 16 and the slit 19.

Slits 17 and 19 allow the diaper to fit snugly around the wearer's waist (using the first bonding means 15, 15) and separately (even in a separate step) (using the second bonding means 16). It will be appreciated that a tight seal against leakage is possible.

FIG. 4 illustrates a schematic diagram of the acting force in a diaper with a slit, in which point 15 represents the first bonding means 15 for fitting the diaper around the waist;
And point 16 represents the second bonding means 16 for fitting the diaper to the foot. Arrows F1 and F2 are the possible pressures applied to the bonding means.

Another embodiment of the diaper of the present invention is illustrated in FIG. The diaper 107 is intermediate between its upper end 105 and its lower end 106 and parallel to the central horizontal axis X, X and its opposing first side end 115 and second side end. The middle longitudinal axis Y, midway between 116 and perpendicular to the transverse axis
-Y. The diaper 107 includes a liquid-impermeable backing sheet 118, an absorbent core 119, and a liquid-permeable covering sheet 120. Diaper 107 further comprises an elastic element 114 mounted between the backing sheet and the covering sheet at the upper edge of the diaper, and an elastic element 113 at the center of the left and right edges. .

The upper edge of the diaper, i.e., the portion generally between the upper end 105 of the diaper and the upper end 119a of the absorbent core, has a substantially rectangular shape applied at the upper right corner (first upper corner) 130 of the diaper. A first area 101a of the pressure sensitive adhesive and a second area 101b of a generally rectangular pressure sensitive adhesive applied at the upper left corner (second upper corner) 131
Is provided. The lower part of the diaper, i.e. the lower end 10
That part near 6 is the third area 1 of the pressure sensitive adhesive
02a and a fourth region 102b of the pressure-sensitive adhesive. The third region 102a is disposed on the right side edge of the diaper, that is, the portion is located at the right end (first side end) 11 of the diaper.
5 and the right end 119b of the absorbent core 119, and the lower end
It is separated from 106 by a distance in the direction of the horizontal axis XX. The fourth region 102b is on the left side edge of the diaper, that is, the portion is on the left end (second side end) 116 and the absorbent core 1
19 and at a distance from the lower end 106 of the diaper in the same manner as the third region 102a. A first area 101a, a second area 101b,
The third 102a and the fourth 102b are applied to the exposed surface of the covering sheet 120 by, for example, an adhesive transfer method.

It will be appreciated that the first region 101a and the second 101b can be moved down from the upper end 105 or slightly inward from the side ends 115 and 116, respectively. Third
The region 102a and the fourth 102b are the side ends 11 of the diaper, respectively.
It can be moved slightly inward from 5 and 116.

The diaper 107 further comprises a pair of slits, ie, a first slit 108a, respectively located in the lower part of the right and left edges and arranged generally symmetrically with respect to the longitudinal axis Y-Y.
And a second slit 108b. The first slit 108a is preferably arcuate and the first region 102a
And a point between the intersection of the first side end 115 and the lower end 106 of the diaper, from a point on the first side end 115 of the diaper, toward the horizontal axis XX, Extending inward.

The second slit 108b has the same arc shape as the first slit 108a, and is located between the fourth region 102b and the intersection of the second side end 116 and the lower end 106 of the diaper. From the point on the second side end 116 of the diaper, the horizontal axis XX
It extends inward toward. The distance between the lower end 106 and the point at which the slits 108b of the first slits 108a and 2 intersect the first side end 115 and the second side end 116, respectively, is parallel to the vertical axis Y-Y. The first area 101a and the second area
Must be at least equal to the length of 101b.

The slits 108a and 108b terminate in a circular opening 111 near the elastic element 103 and inside the side ends 115 and 116 of the diaper, respectively. Slits 108a and 108b
It can be appreciated that the radii of curvature of the slits can be varied, and that these slits can be straight, if desired. Anyway, slits 108a and 108b
Is provided as described above, flaps 127 and 128 are formed at the side edges of the diaper, and the third region 102a
7, and the fourth region 102b is applied to and retained by the flap 128.

In use, the child to be diapered is placed face up on the upper surface of the generally flat shape diaper shown in FIG. 5, so that the child's ass is located approximately in the center of the diaper. The lower part of the diaper is lifted up between the child's feet so that the lower end 106 is flush with the upper end 105. First region 101a at upper end portion 105
And the second area 101b are inserted into the first slit 108a and the second slit 108b, respectively, and are glued to the backing sheet at corner areas where the side edges 115 and 116 intersect the lower edge 106, respectively. This action secures the diaper in place around the child's waist. The flaps 127 and 128 are operated to fit the diaper around the child's thigh and are then attached to the impermeable backing sheet 118 by third and fourth regions 102a and 102b, respectively. This sequence is illustrated on the right side of FIG. 6, where the flap 127 has been moved aside so that the first area 101a is inserted into the first slit 108a as indicated by the directional arrow A. Can be First
After the area 101a is bonded to the backing sheet 118, the flap 127 holding the third area 102a is then brought into adhesive contact with the backing sheet. A diaper in a closed shape around the waist is illustrated on the left side of FIG.

It is to be understood that this invention is not limited to the description and illustrations of the disclosed embodiments, but can be accomplished in a different manner, but also within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a perspective view of a diaper provided with the fastener system of the present invention. FIG. 2 is a perspective view illustrating another embodiment of the fastener system. FIG. 3 is a plan view of the diaper illustrated in FIG. FIG. 4 is a schematic diagram of the acting force in the system of the present invention. FIG. 5 is a plan view, partially in section, of another embodiment of the diaper according to the invention. FIG. 6 is a perspective view of the diaper of FIG. 5 in a closed configuration. 10,107 diaper 11,118 lining sheet 12,120 covering sheet 13,14 elastic element 15 first bonding means 16 second bonding means 101a first area 101b first Second region 102a Third region 102b Fourth region 17,19 Slit 18 Cutout 22,119 Absorbent core 27 First side end 28 Second side end Department

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Filippu Pomez São Paulo Le Agueribatyba, Sao Paulo, Brazil 207 (72) Inventor Rosana Reinho das Neves, San Jose Josedos, Sao Paulo, Brazil 210 / Apty 73 (72) Inventor Eberson Amaral Sao Paulo, Sao Paulo, Brazil Campos Giardheimdas Indoeus Trias Luavernard Gravois 271 (56) References JP-A-53-89534 (JP, A) JP-A Sho JP-A-58-156002 (JP, A) JP-A-59-189808 (JP, U) JP-A-57-13607 (JP, U) JP-A-60-25701 (JP, A) U) Real opening 491-20437 (JP U)

Claims (13)

(57) [Claims] 1. A liquid-impermeable backing sheet; a liquid-permeable covering sheet, the covering sheet having a surface that comes into contact with a wearer's body when using a disposable diaper; and the backing sheet and the covering sheet. An upper end portion; an upper edge portion adjacent to the upper end portion; a lower end portion; a lower edge portion adjacent to the lower end portion; a pair of side ends, each of the side ends; Having side edges adjacent thereto; a horizontal axis between the upper end and the lower end and a vertical axis between the side ends, the horizontal axis and the vertical axis being the center of the disposable diaper. A first upper corner in a region where the upper end and the first side end intersect at a right angle with each other in the region; and an upper end and a second side end where the upper end intersects with the second side end. A disposable diaper having a second upper corner in the area where An upholstery sheet secured to the covering sheet at the edge; and a first adhesive means applied to the body-contacting surface of the covering sheet at the upper edge near each of the upper corners And a second adhesive means applied on each of the edges to the body contacting surface of the covering sheet, each of the second adhesive means being laterally displaced from the associated first adhesive means. Spaced downwardly toward an axis, the first and second adhesive means are cut through the backing sheet and the covering sheet on each side of the disposable diaper and disposable from the associated side end A disposable diaper characterized by being separated by a slit extending toward the longitudinal axis of the diaper. 2. The disposable diaper according to claim 1, wherein each of said slits extends substantially parallel to said horizontal axis. 3. The disposable diaper according to claim 2, wherein said slit ends with a circular cutout. 4. The disposable diaper according to claim 1, wherein each of said slits is arcuate in shape and extends inward and downward toward a central region of the disposable diaper. 5. The disposable diaper according to claim 4, wherein said slit ends in a circular cutout. 6. The disposable diaper according to claim 1, further comprising an elastic element at a central portion of each of said side ends. 7. The disposable diaper according to claim 1, further comprising an elastic element at a central portion of each of said side ends and said upper edge portion. 8. A liquid-impermeable backing sheet; a liquid-permeable covering sheet, the covering sheet having a surface that comes into contact with a wearer's body when using a disposable diaper; and the backing sheet and the covering sheet. An upper end portion; an upper edge portion adjacent to the upper end portion; a lower end portion; a lower edge portion adjacent to the lower end portion; a pair of side ends, each of the side ends; Having side edges adjacent thereto; a horizontal axis between the upper end and the lower end and a vertical axis between the side ends, the horizontal axis and the vertical axis being the center of the disposable diaper. A first upper corner in a region where the upper end and the first side end intersect at a right angle with each other in the region; and an upper end and a second side end where the upper end intersects with the second side end. A disposable diaper having a second upper corner in the area where An upholstery sheet secured to the covering sheet at an edge; further, a first area of pressure sensitive adhesive applied to the liquid permeable covering sheet at the first upper corner; the liquid permeable covering sheet A second area of pressure sensitive adhesive applied at the second upper corner to the second upper corner; applied to one of the side edges and spaced a distance from the lower end toward the horizontal axis. A third region of the adhesive; and a fourth region of the pressure-sensitive adhesive applied to the other of the side edges and spaced a distance from the lower end toward the abscissa. All areas of the pressure-sensitive adhesive are applied to the body-contacting surface of the liquid-permeable covering sheet; further comprising a pair of slits, a first slit and a third area of the pressure-sensitive adhesive. Intersection of the first side end and the lower end Extending inwardly of the diaper from the point on the first side end between the second side end and the second slit of the pressure-sensitive adhesive. A disposable diaper extending from a point on a second side end between the intersection of the lower end and the inside of the diaper toward the horizontal axis. 9. The lower end portion and first and second slits are formed in a first position.
And the distance between the second side edge and the respective intersecting point, measured parallel to the longitudinal axis, is at least equal to the length of the first and second regions of the pressure-sensitive adhesive. The disposable diaper according to item 8. 10. The disposable diaper according to claim 8, wherein said slit ends with a circular opening. 11. The disposable diaper according to claim 8, wherein said slit has an arc shape. 12. The disposable diaper according to any one of claims 8 to 11, wherein said upper edge has an elastic element. 13. A disposable diaper according to any one of claims 8 to 11, wherein said upper edge has an elastic element and said central part of said side edge has an elastic element.