CA1039901A - Disposable diaper with tape fastener having a release liner which also provides a means to grip and remove the topsheet - Google Patents
Disposable diaper with tape fastener having a release liner which also provides a means to grip and remove the topsheetInfo
- Publication number
- CA1039901A CA1039901A CA183,400A CA183400A CA1039901A CA 1039901 A CA1039901 A CA 1039901A CA 183400 A CA183400 A CA 183400A CA 1039901 A CA1039901 A CA 1039901A
- Authority
- CA
- Canada
- Prior art keywords
- topsheet
- disposable diaper
- attached
- diaper
- release liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/58—Adhesive tab fastener elements
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A disposable diaper is provided with a pressure-sensitive tape fastener. The tape is affixed at one end to the liquid retaining backsheet of the diaper and the other end is superposed on a release liner of a generally conventional design from which the tape may be stripped immediately prior to diaper application. The release liner for the tape overlies a portion of the face of the diaper. A first portion of the release liner is secured to the topsheet of the diaper and a second portion thereof is essentially unattached, providing a means to grasp the liner. At least the portion of the topsheet secured to the release liner is releasably secured to the remainder of the diaper so that it may be removed therefrom (after the soiled diaper is removed from the wearer) by gripping and pulling on the unattached portion of the release liner.
A disposable diaper is provided with a pressure-sensitive tape fastener. The tape is affixed at one end to the liquid retaining backsheet of the diaper and the other end is superposed on a release liner of a generally conventional design from which the tape may be stripped immediately prior to diaper application. The release liner for the tape overlies a portion of the face of the diaper. A first portion of the release liner is secured to the topsheet of the diaper and a second portion thereof is essentially unattached, providing a means to grasp the liner. At least the portion of the topsheet secured to the release liner is releasably secured to the remainder of the diaper so that it may be removed therefrom (after the soiled diaper is removed from the wearer) by gripping and pulling on the unattached portion of the release liner.
Description
BACKGROUND OF THE INVENTION
This invention relates to disposable diapers and more particularly ` to such diapers which have a topsheet which is, at least in part, releasably secured to the remainder of the diaper thereby allowing the separable portion to be disposed of in a manner different from that used for the remainder of the diaper.
The present invention is an improvement on the invention described in U.S. Patent 3,842,838 of Dale A, Gellert, issued October 22, 1974, which ;l is commonly assigned to the assignee hereof.
As discussed more fully in the aforementioned U.S. Patent, it is decidedly advantageous to be able to conveniently dispose of the fecal soil on 1 a disposable diaper along with a minimum amount of the diaper in a water ,~l closet while disposing of the remainder of the diaper separately, e.g., in the ` trash. One way of achieving this end is to provide a liquid-pervious topsheet on the diaper at least a portion of which is releasably secured (e. g., attachedby perforations) to the remainder of the dialper.
SUMMARY OF THE INVENTION
The present invention provides an improved means of locating and .
grasping the removable portion of the topsheet of a disposable diaper for ! ~
.;' ''`
~039901 separation. The improved grasping means consists of the tape fastener release liner (or a portion thereof) which is releasably secured to at least ; one of the tapes which are used to secure the diaper about the wearerO One `~
end of the release liner is secured to a removable portion of the liquid pervious topsheet of the diaper while the other end is essentially free, providing a convenient grasping means once the tape has been removed and the diaper used. ;-BRIEF DESCRIPTION OF THE DRAWINGS
While the specification concludes with claims which particularly 10 point out and distinctly claim the subject matter regarded as the invention, it is thought that the invention will be better understood from the following description taken in conjunction with the aco~lrnpanying drawings in which: ;
Figure 1 is a fragmentary plan view of a preferred embodiment of the pr e s ent invention;
Figure 2 is a fragmentary, vertical cross-sectional view of the ,l embodiment of Figure 1 taken through the tape portion 22 b and looking in the clirection of arrows 2-2;
Figure 3 is a fragmentary, vertical cross-sectional view of an alternate embodiment of the present invention showing the tape separated 20 from the release liner; `~
Figure 4 is a perspective view of the in-use position of an exem- ~-plary overall diaper of the present invention; `
Figure 5 is a plan view of a preferred embodiment of a liquid-pervious topsheet for use in the present invention; and ` Figure 6 is a perspective view illustrating the use of the tape release liner for stripping the topsheet from the diaper.
~ . . .
DESCRIPTION OF THE PREFERRED EMBODIMENTS
- Turning now to the drawings, Figure 1 illustrates one corner of ;
a dispoæable diaper. While the present invention can be used with a broad :, .
30 variety of diaper configurations, an exemplary and preferred diaper con-figuration is that of U.S. Patent Re 26,151 which issued January 31, 1967 to R.C. Duncan et al. Briefly, such a diaper is typically comprised of a .: :
, ".
.
103~9~11 liquid retaining backsheet 11, for example a polyethylene film. A portion lla of the backsheet preferably wraps around the lateral edges 12 of the diaper and extends over a portion of the face thereof to provide containment of liquid wastes therein. A second portion llb of the backsheet 11 extends beyond the waistband forming edges 12' and is folded to the position shown in Figure 4 to provide a barrier against the wicking of liquid wastes. While :
the following description assumes this preferred juætaposition of backing `~
sheet 11 with the edges 12 and 12' and the face of the diaper it is to be under- ` ~
stood that the invention does not require the same as will be appreciated by `- -10 those in the art.
Superposed on the backsheet 11 is a pad of liquid absorbent material `~ which can be creped paper or any other suitable material. ~ a preferred ` `~
embodiment, and as described herein, the absorbent pad is comprised of a :~ . :
layer of comminuted wood pulp 13 encased in sheets of tissue paper having at least moderate wet strength; lower sheet 14, and upper sheet 15 which are suitably secured about the comminuted pulp 13. `
Superposed on the absorbent pad is a topsheet designatbd generally by the numeral 16. Although the only requir ement for the topsheet is that it be liquid pervious, allowing liquid wastes to pass through to the absorbent 20 pad, a preferred topsheet 16 will also be hydrophobic so that little or no liquid is retained on it and thereby in contact with the wearerls skin. A
preferred material for use as the topsheet 16 is a non-woven wet-laid fabric of rayon with a binder such as ethyl and methyl methacrylate polymers in a . , .
, non-ionic latex with self-crosslinking properties as manufactured by Rohm ;
and Haas Company and sold under the trademarks "E~hoplex HA-8" and opleæ HA-24", of about 4 to 5 mils thickness, 19 gm/sq.yd. basis weight -and having a dry tensile strength of about 1000 gm~ /inch with the machine ~
direction and about 550 gm. /inch across the machine direction. The machine `
direction will preferably be placed transversely of the diaper (running ~ ;
30 between the lateral edges 12) and such an orientation will be assumed here- ,~
inafter.
. . .
.`:' ''.
: :~
- ` ~03996~1 ..
As disclosed in the aforementioned U.SO Patent 3,84~,838, by making the topsheet 16, or a portion thereof, separable from the remainder of the diaper the fecal soil on the diaper can easily and conveniently be disposed of in the water closet without the need to similarly dispose of the ~-absorbent pad. In this connection, it should be noted that a topsheet 16 formed as described above provides a surprisingly effective filter, allowing only highly liquid and essentially sterile wastes to pass therethrough~ ~uch filtered wastes can consequently be disposed of by the means normally used for solid wastes, e. g., the trash can, without creating an unsanitary condition. ~;
The present invention contemplates the use of a variety of -separable topsheets or topsheet portions including those disclosed in the `
aforementioned U.S. Patent 3,842,838. When using a diaper as disclosed -in the aforementioned Duncan et al. patent the preferred topsheet 16 is that shown in Figure 5 with a width of about 11 1/2 inches and a length of about 15 1/2 inches. A central removable portion 17 (surrounded by a peripheral ` area 20) of about 9 1/2 inches by 14 1 /2 inches is defined by a line of weakness comprised of perforations 18 and cuts 19.
,~ The perforations 18 can co,mprise .080 inch cuts separated by O 020 inch of uncut topsheet 16 in the cross machine direction (lengthwise of thec'diaper) and, 030 inch cuts separated by .030 inch of uncut topsheet in . . .; . .
the machine direction (across the width of the diaper). The cuts 19 provide transitions to facilitate separating the corners of the central portion 17 of ; -the topsheet 16 and preferably extend about one inch transversely of the -diaper (between the lateral edges 12) and about 1 5/8 inches longitudinally ~ ~ -of the diaper (parallel to the lateral edges 12). The cuts 19 extend across one another in an "X" configuration merely for convenience in forming with the use of conventional cutting and scoring equipment without the need for elaborate roll dies. --The peripheral area 20 of the topsheet 16 is preferably attached to the remainder of the diaper by essentially liquid insoluble aclhesives, ; applied in the region 21 of Figures 2 and 5, as described in the aforemen-,,' '~ .
s _ 4 -..... .
. . . . .
~0399C~
tioned Duncan et al. patent. If the diaper configuration being used requires the use of pleat forming adhesive bonds which are located within the re-movable area 17 of the topsheet, water (urine) soluble adhesives are preferably used for such bonds. A particularly suitable water soluble adhesive is low molecular weight polyvinyl alcohol, approximately 88%
hydrolyzed, as produced by E. I. duPont de Nemours & Compan~ and sold ;
;..-: ~:
under the trade mark "Elvanol #51-05". By applying an aqueous solution `
containing about 12-Z8%, by weight, of "Elvanol #51-05" at a temperature of ~ -from about 100F to about 200F, bonds can be formed which are satisfactory 10 to hold the diaper in the desired configuration for initial diaper application but which dissolve in use (from urine), allowing easy separation of the central removable portion 17 of the topsheet 16.
, ~.~.. .
In one alternate e~nbodiment, not illustrated, the topsheet can be releasably secured to the remainder of the diaper by other than lines of weakness defining a removable central portion; instead, the entire topsheet can be releasably secured to the remainder of the diaper so that it is held in place during application but separable thereafterO Releasable securement for this embodiment could be achieved by the use of the aforementioned .`
"Elvanol ~51-05" adhesive or by embossingO
~ 20 Although safety pins or other means can be used to hold a dis- ``
posable diaper about the wearer, pressure-sensitive tapes are a convenient `
and widely ace~3pted means to achieve this end. Figure 4 shows a complete diaper of conventional construction including the features of the present invention, held in the in-use configuration by tapes 22. Returning to Figure
This invention relates to disposable diapers and more particularly ` to such diapers which have a topsheet which is, at least in part, releasably secured to the remainder of the diaper thereby allowing the separable portion to be disposed of in a manner different from that used for the remainder of the diaper.
The present invention is an improvement on the invention described in U.S. Patent 3,842,838 of Dale A, Gellert, issued October 22, 1974, which ;l is commonly assigned to the assignee hereof.
As discussed more fully in the aforementioned U.S. Patent, it is decidedly advantageous to be able to conveniently dispose of the fecal soil on 1 a disposable diaper along with a minimum amount of the diaper in a water ,~l closet while disposing of the remainder of the diaper separately, e.g., in the ` trash. One way of achieving this end is to provide a liquid-pervious topsheet on the diaper at least a portion of which is releasably secured (e. g., attachedby perforations) to the remainder of the dialper.
SUMMARY OF THE INVENTION
The present invention provides an improved means of locating and .
grasping the removable portion of the topsheet of a disposable diaper for ! ~
.;' ''`
~039901 separation. The improved grasping means consists of the tape fastener release liner (or a portion thereof) which is releasably secured to at least ; one of the tapes which are used to secure the diaper about the wearerO One `~
end of the release liner is secured to a removable portion of the liquid pervious topsheet of the diaper while the other end is essentially free, providing a convenient grasping means once the tape has been removed and the diaper used. ;-BRIEF DESCRIPTION OF THE DRAWINGS
While the specification concludes with claims which particularly 10 point out and distinctly claim the subject matter regarded as the invention, it is thought that the invention will be better understood from the following description taken in conjunction with the aco~lrnpanying drawings in which: ;
Figure 1 is a fragmentary plan view of a preferred embodiment of the pr e s ent invention;
Figure 2 is a fragmentary, vertical cross-sectional view of the ,l embodiment of Figure 1 taken through the tape portion 22 b and looking in the clirection of arrows 2-2;
Figure 3 is a fragmentary, vertical cross-sectional view of an alternate embodiment of the present invention showing the tape separated 20 from the release liner; `~
Figure 4 is a perspective view of the in-use position of an exem- ~-plary overall diaper of the present invention; `
Figure 5 is a plan view of a preferred embodiment of a liquid-pervious topsheet for use in the present invention; and ` Figure 6 is a perspective view illustrating the use of the tape release liner for stripping the topsheet from the diaper.
~ . . .
DESCRIPTION OF THE PREFERRED EMBODIMENTS
- Turning now to the drawings, Figure 1 illustrates one corner of ;
a dispoæable diaper. While the present invention can be used with a broad :, .
30 variety of diaper configurations, an exemplary and preferred diaper con-figuration is that of U.S. Patent Re 26,151 which issued January 31, 1967 to R.C. Duncan et al. Briefly, such a diaper is typically comprised of a .: :
, ".
.
103~9~11 liquid retaining backsheet 11, for example a polyethylene film. A portion lla of the backsheet preferably wraps around the lateral edges 12 of the diaper and extends over a portion of the face thereof to provide containment of liquid wastes therein. A second portion llb of the backsheet 11 extends beyond the waistband forming edges 12' and is folded to the position shown in Figure 4 to provide a barrier against the wicking of liquid wastes. While :
the following description assumes this preferred juætaposition of backing `~
sheet 11 with the edges 12 and 12' and the face of the diaper it is to be under- ` ~
stood that the invention does not require the same as will be appreciated by `- -10 those in the art.
Superposed on the backsheet 11 is a pad of liquid absorbent material `~ which can be creped paper or any other suitable material. ~ a preferred ` `~
embodiment, and as described herein, the absorbent pad is comprised of a :~ . :
layer of comminuted wood pulp 13 encased in sheets of tissue paper having at least moderate wet strength; lower sheet 14, and upper sheet 15 which are suitably secured about the comminuted pulp 13. `
Superposed on the absorbent pad is a topsheet designatbd generally by the numeral 16. Although the only requir ement for the topsheet is that it be liquid pervious, allowing liquid wastes to pass through to the absorbent 20 pad, a preferred topsheet 16 will also be hydrophobic so that little or no liquid is retained on it and thereby in contact with the wearerls skin. A
preferred material for use as the topsheet 16 is a non-woven wet-laid fabric of rayon with a binder such as ethyl and methyl methacrylate polymers in a . , .
, non-ionic latex with self-crosslinking properties as manufactured by Rohm ;
and Haas Company and sold under the trademarks "E~hoplex HA-8" and opleæ HA-24", of about 4 to 5 mils thickness, 19 gm/sq.yd. basis weight -and having a dry tensile strength of about 1000 gm~ /inch with the machine ~
direction and about 550 gm. /inch across the machine direction. The machine `
direction will preferably be placed transversely of the diaper (running ~ ;
30 between the lateral edges 12) and such an orientation will be assumed here- ,~
inafter.
. . .
.`:' ''.
: :~
- ` ~03996~1 ..
As disclosed in the aforementioned U.SO Patent 3,84~,838, by making the topsheet 16, or a portion thereof, separable from the remainder of the diaper the fecal soil on the diaper can easily and conveniently be disposed of in the water closet without the need to similarly dispose of the ~-absorbent pad. In this connection, it should be noted that a topsheet 16 formed as described above provides a surprisingly effective filter, allowing only highly liquid and essentially sterile wastes to pass therethrough~ ~uch filtered wastes can consequently be disposed of by the means normally used for solid wastes, e. g., the trash can, without creating an unsanitary condition. ~;
The present invention contemplates the use of a variety of -separable topsheets or topsheet portions including those disclosed in the `
aforementioned U.S. Patent 3,842,838. When using a diaper as disclosed -in the aforementioned Duncan et al. patent the preferred topsheet 16 is that shown in Figure 5 with a width of about 11 1/2 inches and a length of about 15 1/2 inches. A central removable portion 17 (surrounded by a peripheral ` area 20) of about 9 1/2 inches by 14 1 /2 inches is defined by a line of weakness comprised of perforations 18 and cuts 19.
,~ The perforations 18 can co,mprise .080 inch cuts separated by O 020 inch of uncut topsheet 16 in the cross machine direction (lengthwise of thec'diaper) and, 030 inch cuts separated by .030 inch of uncut topsheet in . . .; . .
the machine direction (across the width of the diaper). The cuts 19 provide transitions to facilitate separating the corners of the central portion 17 of ; -the topsheet 16 and preferably extend about one inch transversely of the -diaper (between the lateral edges 12) and about 1 5/8 inches longitudinally ~ ~ -of the diaper (parallel to the lateral edges 12). The cuts 19 extend across one another in an "X" configuration merely for convenience in forming with the use of conventional cutting and scoring equipment without the need for elaborate roll dies. --The peripheral area 20 of the topsheet 16 is preferably attached to the remainder of the diaper by essentially liquid insoluble aclhesives, ; applied in the region 21 of Figures 2 and 5, as described in the aforemen-,,' '~ .
s _ 4 -..... .
. . . . .
~0399C~
tioned Duncan et al. patent. If the diaper configuration being used requires the use of pleat forming adhesive bonds which are located within the re-movable area 17 of the topsheet, water (urine) soluble adhesives are preferably used for such bonds. A particularly suitable water soluble adhesive is low molecular weight polyvinyl alcohol, approximately 88%
hydrolyzed, as produced by E. I. duPont de Nemours & Compan~ and sold ;
;..-: ~:
under the trade mark "Elvanol #51-05". By applying an aqueous solution `
containing about 12-Z8%, by weight, of "Elvanol #51-05" at a temperature of ~ -from about 100F to about 200F, bonds can be formed which are satisfactory 10 to hold the diaper in the desired configuration for initial diaper application but which dissolve in use (from urine), allowing easy separation of the central removable portion 17 of the topsheet 16.
, ~.~.. .
In one alternate e~nbodiment, not illustrated, the topsheet can be releasably secured to the remainder of the diaper by other than lines of weakness defining a removable central portion; instead, the entire topsheet can be releasably secured to the remainder of the diaper so that it is held in place during application but separable thereafterO Releasable securement for this embodiment could be achieved by the use of the aforementioned .`
"Elvanol ~51-05" adhesive or by embossingO
~ 20 Although safety pins or other means can be used to hold a dis- ``
posable diaper about the wearer, pressure-sensitive tapes are a convenient `
and widely ace~3pted means to achieve this end. Figure 4 shows a complete diaper of conventional construction including the features of the present invention, held in the in-use configuration by tapes 22. Returning to Figure
2, the tape 22 is shown as it is applied to the diaper prior to use. A first ,;
portion 22a of the tape 22 is secured to the underside of the backsheet 11. i ;
;- A rblease liner is provided to prevent inadvertent contact between the second ~ -portion 22b of the tape 22 and other objects prior to its use. U.S. Patent
portion 22a of the tape 22 is secured to the underside of the backsheet 11. i ;
;- A rblease liner is provided to prevent inadvertent contact between the second ~ -portion 22b of the tape 22 and other objects prior to its use. U.S. Patent
3 ,646, 937 which issued March 7, 1972 to D.A. Gellert and which is assigned , 30 to the assignee of the present invention discloses a plurality of desirable ~!~ configurations for such release liners. A typical and satisfactory release .. ., ~ . .
liner for use with the present invention consists of a 1 inch wide sheet of ' ,'' ' .
.,: ,~
~.~399~1 polypropylene having a tensile strength of about 15 lbso /inch with a silicone --surface treating on the tape-contacti~g side to facilitate release.
The release liner used with the present invention differs in certain important details from that disclosed in the aforementioned U.S. Patent 3,646,937. First, it is preferably segmented into portions 23a and 23b.
The portion 23a extends around the edge of the diaper far enough so that the tape portion 22b is not attached thereto. Consequently tape portion 22b has no tendency to tear the backsheet 11 at the edges thereof when the diaper is applied. Portion Z3a is preferably secured by any suitable adhesive 26 to 10 the diaper, and more particularly to the portion lla of the backsheet which . . .
overlies a portion of the absorbent pad, as a matter of convenience to avoid the necessity of disposing of it separately.
.; , .: . .
The remaining portion 23b of the release liner extends beyond the ~ ~
.' . . .
portion lla of the backsheet and overlies a portion of the central removable portion 17 of the topsheet, being secured thereto by a strong adhesive bond in the region 24. One suitable adhesive for use in this application is a modified acrylate adhesive as made by the Minnesota Mining & Manufacturing Company of St. Paul, Minnesota and presently sold under the trademark "Scotch Brand No. SLl-250-612" (lot 620). Preferably, this same adhesive ~, 20 will be used as the adhesive 26 to simplify the assembly of the diaper as discussed more fully hereinafter.
It is important that the release liner portion 23b be essentially unsecured to the portion lla of the backsheet in order that it can function as will hereinafter be described. Preferably, there is no securement at all;
, `1 : , `~ however, a readily releasable securement, e~g., peelable, is within the meaning of essentially unsecured as used herein. One simple means to ` assure the desired lack of attachment is to avoid the use of adhesives be-.. ~ -,. . .
tween release liner portion 23b and backsheet portion lla. An alternate and preferred means is the use of a tab 25 of colored polyethylene film or the 30 like juxtaposed between release liner portion 23b and backsheet portion 1 la.
An adhesive 26 such as that used on release liner portion 23a is also used on portion 23b, effecting adhesion between the portion 23b and the tab 25.
.
,' . . ~ .
'~ '',' 103~90~
This preferred configuration offers two primary advantages. The use of ;
colored material for the tab highlights the presence thereof and consequently encourages the use of it (in conjunction with the r~aease liner portion 23b, etc. ) to remove the central portion 17 of the topsheet 16 and dispose of the fecal wastes thereon in the water closet as desired. In addition, use of the additional element, tab 25, actually simplifies the assembly of the diaper and tape/release liner/topsheet tear tab assembly when using equipment such as that described in Canadian Patent Application Serial Number 180,076 `
filedAug. 18, 1973, which is assignedtothe assignee hereof, allowing the , use of a release liner which is a single sheet with uniform properties across its width. The liner is simply split into portions 23a and 23b by a cutter , as it is being laminated to the other layers (just prior to being affixed to , the diaper).
If desired, the tab 25 can cover less than the entire underside of the essentially unsecured portion of the release liner portion 23b. If this is done, a small region of adhesive 26 which underlies said unsecured portion will be in contact with and releasably secured to the portion lla of the back- ;`
sheet 11, thereby preventing said unsecured portion from raising prematurely.
A satisfactory way to pro~ide releasable securement in this way is the ;
provision of a hole of about 1/8 inch in diameter (not illustrated) centrally ~;, in the tab 25, ~` Fig~ es3 illustrates a variation of the invention, showing the; elements thereof as they are just prior to the application of the diaper to the wearer; i. e., with the tape removed from the release liner~ In this variation, the release liner 23b' functions in the same manner as the release liner portion 23b of Figure 2, being adhered to a tab 25a by adhesive 26' which adhesive also is secured to the separably attached portion 17' of the topsheet in the region 24'. An extension 25b of the tab 25a is provided and is initially integral therewith. A preferred material for use as the tab 25a, and tab portion 25b is an oriented polypropylene film of about 1/2 to 1 mil in thickness.
.:.;
` The llgrain" of the film is oriented across the width (the narrow dirrlention) of the tape 22b'. The film is easily torn along the grain as the tape portion ~-, . .. .
"" ,',; ~:. ~
, ' ~'~'.~ ' ' ' . . .
~0399~1 22b' is peeled from the release liner 23b'o Tab portion 25b remains secured to the tape 22b but does not interfere with the functioning thereof.
The remaining portions of the embodiment of Figure 3 are similar to the corresponding portions of the embodiment of Figure 2 and are similarly numbered, but inclu'ding the prime (') designation. The advantage of this embodiment is that the tab portion 25b functionally replaces the more expensive release liner portion 23a and that the entire tape/release liner/
tab assembly can be easily assembled from a minimum of components. -When the diaper is soiled, it is removed from the wearer by 10 peeling or tearing the tape 22. Disposal of the fecal wastes contained in the diaper is then effected by pulling on the release liner portion 23b (or 23b') with the action shown in Figure 6 as the diaper is held over a water closet or the like. The comparatively small amount of material which comprises the removable portion 17 of the topsheet 16 can readily be handled in water closets and the remainder of the sanitary waste system and the separation thereof from the remainder of the diaper is easily effected by pulling as illustrated.
The foregoing is illustrative of the invention but many modifications "` ' `
can be made to the embodiments described without departing from the 20 essential concepts of the inventionO
, . .. ~
.,~1 , ., :, :. .
~` '' ,'~' `.
': ~
~ .
.'
liner for use with the present invention consists of a 1 inch wide sheet of ' ,'' ' .
.,: ,~
~.~399~1 polypropylene having a tensile strength of about 15 lbso /inch with a silicone --surface treating on the tape-contacti~g side to facilitate release.
The release liner used with the present invention differs in certain important details from that disclosed in the aforementioned U.S. Patent 3,646,937. First, it is preferably segmented into portions 23a and 23b.
The portion 23a extends around the edge of the diaper far enough so that the tape portion 22b is not attached thereto. Consequently tape portion 22b has no tendency to tear the backsheet 11 at the edges thereof when the diaper is applied. Portion Z3a is preferably secured by any suitable adhesive 26 to 10 the diaper, and more particularly to the portion lla of the backsheet which . . .
overlies a portion of the absorbent pad, as a matter of convenience to avoid the necessity of disposing of it separately.
.; , .: . .
The remaining portion 23b of the release liner extends beyond the ~ ~
.' . . .
portion lla of the backsheet and overlies a portion of the central removable portion 17 of the topsheet, being secured thereto by a strong adhesive bond in the region 24. One suitable adhesive for use in this application is a modified acrylate adhesive as made by the Minnesota Mining & Manufacturing Company of St. Paul, Minnesota and presently sold under the trademark "Scotch Brand No. SLl-250-612" (lot 620). Preferably, this same adhesive ~, 20 will be used as the adhesive 26 to simplify the assembly of the diaper as discussed more fully hereinafter.
It is important that the release liner portion 23b be essentially unsecured to the portion lla of the backsheet in order that it can function as will hereinafter be described. Preferably, there is no securement at all;
, `1 : , `~ however, a readily releasable securement, e~g., peelable, is within the meaning of essentially unsecured as used herein. One simple means to ` assure the desired lack of attachment is to avoid the use of adhesives be-.. ~ -,. . .
tween release liner portion 23b and backsheet portion lla. An alternate and preferred means is the use of a tab 25 of colored polyethylene film or the 30 like juxtaposed between release liner portion 23b and backsheet portion 1 la.
An adhesive 26 such as that used on release liner portion 23a is also used on portion 23b, effecting adhesion between the portion 23b and the tab 25.
.
,' . . ~ .
'~ '',' 103~90~
This preferred configuration offers two primary advantages. The use of ;
colored material for the tab highlights the presence thereof and consequently encourages the use of it (in conjunction with the r~aease liner portion 23b, etc. ) to remove the central portion 17 of the topsheet 16 and dispose of the fecal wastes thereon in the water closet as desired. In addition, use of the additional element, tab 25, actually simplifies the assembly of the diaper and tape/release liner/topsheet tear tab assembly when using equipment such as that described in Canadian Patent Application Serial Number 180,076 `
filedAug. 18, 1973, which is assignedtothe assignee hereof, allowing the , use of a release liner which is a single sheet with uniform properties across its width. The liner is simply split into portions 23a and 23b by a cutter , as it is being laminated to the other layers (just prior to being affixed to , the diaper).
If desired, the tab 25 can cover less than the entire underside of the essentially unsecured portion of the release liner portion 23b. If this is done, a small region of adhesive 26 which underlies said unsecured portion will be in contact with and releasably secured to the portion lla of the back- ;`
sheet 11, thereby preventing said unsecured portion from raising prematurely.
A satisfactory way to pro~ide releasable securement in this way is the ;
provision of a hole of about 1/8 inch in diameter (not illustrated) centrally ~;, in the tab 25, ~` Fig~ es3 illustrates a variation of the invention, showing the; elements thereof as they are just prior to the application of the diaper to the wearer; i. e., with the tape removed from the release liner~ In this variation, the release liner 23b' functions in the same manner as the release liner portion 23b of Figure 2, being adhered to a tab 25a by adhesive 26' which adhesive also is secured to the separably attached portion 17' of the topsheet in the region 24'. An extension 25b of the tab 25a is provided and is initially integral therewith. A preferred material for use as the tab 25a, and tab portion 25b is an oriented polypropylene film of about 1/2 to 1 mil in thickness.
.:.;
` The llgrain" of the film is oriented across the width (the narrow dirrlention) of the tape 22b'. The film is easily torn along the grain as the tape portion ~-, . .. .
"" ,',; ~:. ~
, ' ~'~'.~ ' ' ' . . .
~0399~1 22b' is peeled from the release liner 23b'o Tab portion 25b remains secured to the tape 22b but does not interfere with the functioning thereof.
The remaining portions of the embodiment of Figure 3 are similar to the corresponding portions of the embodiment of Figure 2 and are similarly numbered, but inclu'ding the prime (') designation. The advantage of this embodiment is that the tab portion 25b functionally replaces the more expensive release liner portion 23a and that the entire tape/release liner/
tab assembly can be easily assembled from a minimum of components. -When the diaper is soiled, it is removed from the wearer by 10 peeling or tearing the tape 22. Disposal of the fecal wastes contained in the diaper is then effected by pulling on the release liner portion 23b (or 23b') with the action shown in Figure 6 as the diaper is held over a water closet or the like. The comparatively small amount of material which comprises the removable portion 17 of the topsheet 16 can readily be handled in water closets and the remainder of the sanitary waste system and the separation thereof from the remainder of the diaper is easily effected by pulling as illustrated.
The foregoing is illustrative of the invention but many modifications "` ' `
can be made to the embodiments described without departing from the 20 essential concepts of the inventionO
, . .. ~
.,~1 , ., :, :. .
~` '' ,'~' `.
': ~
~ .
.'
Claims (19)
1. In a disposable diaper having a liquid retaining backsheet, a liquid absorbent pad and a separably attached liquid pervious topsheet, the improvement which comprises a tape means for securing said diaper to the wearer, a first portion of said tape means attached to said backsheet and a second portion of said tape means releasably held to a release liner, said release liner being attached to said liquid previous topsheet and adapted for qripping and removing said topsheet.
2. The disposable diaper of Claim 1 which is initially held in a pleated configuration by adhesive bonds to said separably attached topsheet, said bonds being formed from a water soluble adhesive
3. The disposable diaper of Claim 2 wherein said separably attached topsheet is the central portion of the topsheet and attached to the remaining portions thereof by lines of weakness.
4. The disposable diaper of Claim 2 wherein said water soluble adhesive is polyvinyl alcohol.
5. The disposable diaper of Claim 4 wherein said separably attached topsheet is the central portion of the topsheet and attached to the remaining portions thereof by lines of weakness.
6. The disposable diaper of Claim 1 wherein said separably attached topsheet is the central portion of the topsheet and attached to the remaining portions thereof by lines of weakness.
7. The disposable diaper of Claim 1 wherein a portion of said release liner has affixed to the face opposite said tape means a tab of colored material.
8. The disposable diaper of Claim 6 wherein a portion of said release liner has affixed to the face opposite said tape means a tab of colored material.
9. In a disposable diaper having a liquid retaining backsheet, a liquid absorbent pad and a separably attached liquid pervious topsheet, the improvement which comprises a tape means fox securing said diaper to the wearer, a first portion of said tape means attached to said back-sheet and a second portion of said tape means releasably held to a release liner, said release liner being attached at one end to said separably attached topsheet and adapted for gripping and removing said topsheet and a tab of material underlying and secured to the portion of said release liner remote from said attachment to said topsheet.
10. The disposable diaper of Claim 9 which is initially held in a pleated configuration by adhesive bonds to said separably attached topsheet, said bonds being formed from a water soluble adhesive.
11. The disposable diaper of Claim 10 wherein said separably attached topsheet is the central portion of the topsheet and attached to the remaining portions thereof by lines of weakness.
12. The disposable diaper of Claim 10 wherein said water soluble adhesive is polyvinyl alcohol.
13. The disposable diaper of Claim 12 wherein said separably attached topsheet is the central portion of the topsheet and attached to the remaining portions thereof by lines of weakness.
14. The disposable diaper of Claim 9 wherein said separably attached topsheet is the central portion of the topsheet and attached to the remaining portions thereof by lines of weakness.
15. The disposable diaper of Claim 9 in which said tab is of weak material and extends beyond said release liner and underlies and is attached to said tape means.
16. The disposable diaper of Claim 15 wherein said separably attached topsheet is the central portion of the topsheet and attached to the remaining portions thereof by lines of weakness.
17. The disposable diaper of Claim 16 which is initially held in a pleated configuration by adhesive bonds to said separably attached topsheet, said bonds being formed from a water soluble adhesive.
18. The disposable diaper of Claim 15 wherein a portion a portion of said release liner is releasably secured to said diaper thereby retaining said release liner in place prior to its use.
19. The disposable diaper of Claim 15 wherein said tab is of oriented polypropylene, the grain of which is oriented widthwise of said tape means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29814272A | 1972-10-16 | 1972-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1039901A true CA1039901A (en) | 1978-10-10 |
Family
ID=23149230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA183,400A Expired CA1039901A (en) | 1972-10-16 | 1973-10-15 | Disposable diaper with tape fastener having a release liner which also provides a means to grip and remove the topsheet |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US3794038A (en) |
| JP (1) | JPS4994450A (en) |
| AT (1) | AT332327B (en) |
| BE (1) | BE806078A (en) |
| CA (1) | CA1039901A (en) |
| CH (1) | CH559012A5 (en) |
| DE (1) | DE2351273A1 (en) |
| DK (1) | DK136753B (en) |
| ES (1) | ES203722Y (en) |
| FI (1) | FI54994C (en) |
| FR (1) | FR2202659B1 (en) |
| GB (1) | GB1444433A (en) |
| IE (1) | IE38366B1 (en) |
| IT (1) | IT995884B (en) |
| MX (1) | MX143627A (en) |
| NL (1) | NL7314135A (en) |
| NO (1) | NO133218C (en) |
| SE (1) | SE385540B (en) |
Families Citing this family (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3848594A (en) * | 1973-06-27 | 1974-11-19 | Procter & Gamble | Tape fastening system for disposable diaper |
| US3881487A (en) * | 1973-07-30 | 1975-05-06 | Kimberly Clark Co | Flushable disposable diaper structure |
| US3874385A (en) * | 1973-09-17 | 1975-04-01 | Procter & Gamble | Laminated diaper topsheet to provide disposability of solid wastes |
| US4100921A (en) * | 1973-10-29 | 1978-07-18 | Colgate-Palmolive Company | Diaper fastener |
| US4378800A (en) * | 1973-10-29 | 1983-04-05 | Colgate-Palmolive Company | Disposable diaper |
| US3931666A (en) * | 1974-02-04 | 1976-01-13 | Colgate-Palmolive Company | Reusable adhesive diaper fastener |
| US3880165A (en) * | 1974-05-20 | 1975-04-29 | Rose Prizzia | Disposable diaper with T-shirt holding means |
| US3978861A (en) * | 1974-05-23 | 1976-09-07 | Colgate-Palmolive Company | Disposable diaper with end flap means and method |
| US3901237A (en) * | 1974-07-31 | 1975-08-26 | Johnson & Johnson | Fastening means for a disposable diaper |
| US3900031A (en) * | 1974-08-22 | 1975-08-19 | Kimberly Clark Co | Disposable diaper with reinforced waistband and tape attachment means |
| US3920016A (en) * | 1974-09-03 | 1975-11-18 | Johnson & Johnson | Fastening tab means for a disposable diaper |
| US3921638A (en) * | 1974-10-31 | 1975-11-25 | Colgate Palmolive Co | Diaper with pleat securing tape means |
| US3952745A (en) * | 1974-11-19 | 1976-04-27 | The Procter & Gamble Company | Disposable diaper having readily flushable absorbent media and improved pad intergrity in use |
| US3920019A (en) * | 1974-12-12 | 1975-11-18 | Colgate Palmolive Co | Disposable diaper with cover means |
| US3954106A (en) * | 1975-01-08 | 1976-05-04 | Johnson & Johnson | Disposable diaper having an off-set tab fastener means and release facing on diaper outer surface |
| US3948258A (en) * | 1975-02-24 | 1976-04-06 | Colgate-Palmolive Company | Diaper tape fastener |
| US3948267A (en) * | 1975-02-24 | 1976-04-06 | Colgate-Palmolive Company | Diaper with tape fastener |
| US4024867A (en) * | 1975-03-21 | 1977-05-24 | Johnson & Johnson | Disposable diaper with permanently attached adhesive belt fastening means |
| US4100922A (en) * | 1975-07-09 | 1978-07-18 | Colgate-Palmolive Company | Disposable diaper |
| US3989047A (en) * | 1975-09-29 | 1976-11-02 | Johnson & Johnson | Diaper with loop-type adhesive fastener |
| US3987793A (en) * | 1975-09-29 | 1976-10-26 | Johnson & Johnson | Diaper with tab fastener having backing web and face web |
| US3989048A (en) * | 1975-09-29 | 1976-11-02 | Johnson & Johnson | Diaper with loop-type adhesive fastener releasably secured to diaper facing |
| US4020842A (en) * | 1975-10-23 | 1977-05-03 | Avery International Corporation | Linerless, reclosable tab stock |
| US4029098A (en) * | 1975-11-10 | 1977-06-14 | Colgate-Palmolive Company | Tape fastener for disposable diaper |
| ZA766067B (en) * | 1975-11-24 | 1978-05-30 | Colgate Palmolive Co | Disposable diaper with waist fluid barrier |
| US3990449A (en) * | 1975-12-19 | 1976-11-09 | Johnson & Johnson | Tab fastener having at least two anchoring legs |
| US4037602A (en) * | 1976-02-26 | 1977-07-26 | Hawthorne Janet R | Adaptable diaper |
| US4136698A (en) * | 1976-10-20 | 1979-01-30 | Johnson & Johnson | Diaper with tab fastener having grippable adhesive-free end region |
| US5236429A (en) * | 1982-10-25 | 1993-08-17 | Molnlycke Ab | Disposable diaper |
| US5108384A (en) * | 1990-09-11 | 1992-04-28 | The Procter & Gamble Company | Disposable absorbent article with combination mechanical and adhesive tape fastener system and having reserve adhesive tape for improved disposability |
| US11690746B2 (en) | 2004-04-02 | 2023-07-04 | Applied Biokinetics Llc | Pre-cut adhesive supports for anatomical support, pain reduction, or therapeutic treatment |
| US8216201B2 (en) * | 2009-05-20 | 2012-07-10 | Beck Sandra C | Washable diaper and method of assembly |
| US8894626B2 (en) | 2009-05-20 | 2014-11-25 | Sandra C. BECK | Washable diaper and methods of assembly and manufacture |
| US20120323205A1 (en) * | 2011-06-15 | 2012-12-20 | Sarah Beth Vanderwagen | Burn diaper |
| US11229558B2 (en) | 2012-07-02 | 2022-01-25 | Sandra C. BECK | Washable diaper |
| US9107780B2 (en) * | 2013-03-07 | 2015-08-18 | 1567958 Alberta Ltd. | Disposable pad for children's outfit |
| US10327966B2 (en) | 2016-07-22 | 2019-06-25 | Scottie Watson | Diaper having top edge tab |
| USD931440S1 (en) | 2018-01-11 | 2021-09-21 | Sandra C. BECK | Diaper |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2002368A (en) * | 1934-06-28 | 1935-05-21 | Charles L Fancher | Diaper pad |
| NL281020A (en) * | 1961-07-17 | 1900-01-01 | ||
| US3646937A (en) * | 1970-02-19 | 1972-03-07 | Procter & Gamble | Improved pressure-sensitive tape fastener for disposable diapers |
| US3620217A (en) * | 1970-03-18 | 1971-11-16 | Procter & Gamble | Disposable diaper having pressure-sensitive tape fastener and built-in disposal fastener |
| US3636952A (en) * | 1970-04-24 | 1972-01-25 | Riegel Textile Corp | Disposable combination flushable diaper and protective cover |
| US3642001A (en) * | 1970-07-27 | 1972-02-15 | Reinhardt N Sabee | Disposable diaper or the like |
| US3667466A (en) * | 1970-09-21 | 1972-06-06 | Harold J Ralph | Self-disintegrating diaper liner and retainer |
-
1972
- 1972-10-16 US US00298142A patent/US3794038A/en not_active Expired - Lifetime
-
1973
- 1973-10-10 IE IE1801/73A patent/IE38366B1/en unknown
- 1973-10-12 DE DE19732351273 patent/DE2351273A1/en not_active Withdrawn
- 1973-10-12 AT AT872973A patent/AT332327B/en not_active IP Right Cessation
- 1973-10-12 SE SE7313904A patent/SE385540B/en unknown
- 1973-10-15 NO NO4001/73A patent/NO133218C/no unknown
- 1973-10-15 CH CH1457373A patent/CH559012A5/xx not_active IP Right Cessation
- 1973-10-15 FI FI3191/73A patent/FI54994C/en active
- 1973-10-15 BE BE136688A patent/BE806078A/en unknown
- 1973-10-15 FR FR7336667A patent/FR2202659B1/fr not_active Expired
- 1973-10-15 MX MX146765A patent/MX143627A/en unknown
- 1973-10-15 DK DK557673AA patent/DK136753B/en unknown
- 1973-10-15 IT IT30149/73A patent/IT995884B/en active
- 1973-10-15 NL NL7314135A patent/NL7314135A/xx not_active Application Discontinuation
- 1973-10-15 CA CA183,400A patent/CA1039901A/en not_active Expired
- 1973-10-16 JP JP48116255A patent/JPS4994450A/ja active Pending
- 1973-10-16 GB GB4810073A patent/GB1444433A/en not_active Expired
- 1973-10-17 ES ES1973203722U patent/ES203722Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE806078A (en) | 1974-04-16 |
| NO133218B (en) | 1975-12-22 |
| FI54994B (en) | 1979-01-31 |
| ES203722U (en) | 1976-01-01 |
| DE2351273A1 (en) | 1974-04-25 |
| IT995884B (en) | 1975-11-20 |
| CH559012A5 (en) | 1975-02-28 |
| DK136753C (en) | 1978-05-01 |
| ATA872973A (en) | 1976-01-15 |
| DK136753B (en) | 1977-11-21 |
| IE38366B1 (en) | 1978-03-01 |
| MX143627A (en) | 1981-06-15 |
| SE385540B (en) | 1976-07-12 |
| AT332327B (en) | 1976-09-27 |
| IE38366L (en) | 1974-04-16 |
| FR2202659A1 (en) | 1974-05-10 |
| NO133218C (en) | 1976-03-31 |
| FR2202659B1 (en) | 1977-05-27 |
| AU6101873A (en) | 1975-04-10 |
| FI54994C (en) | 1979-05-10 |
| GB1444433A (en) | 1976-07-28 |
| NL7314135A (en) | 1974-04-18 |
| ES203722Y (en) | 1977-06-01 |
| US3794038A (en) | 1974-02-26 |
| JPS4994450A (en) | 1974-09-07 |
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