CA1213702A - Disposable diaper with refastenable tabs - Google PatentsDisposable diaper with refastenable tabs
- Publication number
- CA1213702A CA1213702A CA 439590 CA439590A CA1213702A CA 1213702 A CA1213702 A CA 1213702A CA 439590 CA439590 CA 439590 CA 439590 A CA439590 A CA 439590A CA 1213702 A CA1213702 A CA 1213702A
- Grant status
- Patent type
- Prior art keywords
- 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.)
- 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
TITLE: ARRANGEMENT IN A DISPOSABLE DIAPER
ABSTRACT OF THE DISCLOSURE
A disposable diaper which can be put on by means of pressure-adhesive tape. For loosening and refastening the fastening tape tabs, the diaper is provided in the region for fastening the tape tabs with a non-elastic plastic strip, suitably of polyester.
Disposable Diaper with Refastenable Tabs The present invention relates to a device in a disposable diaper put on by means of pressure adhesive tape, comprisiny a liquid permeable outer layer, preferably of non-woven material, closest to the user during use of the diaper, a liquid-tight outer layer, suitably of polyethylene, and an absorbent body disposed between the outer layers.
Disposable diapers now use almost exclusively tape tabs to tighten the diaper around the body of the user. Despite great efforts, diaper manufacturers have up to now not succeeded in designing tape fastening arrangements which fulfill all desires.
Since we are dealing with disposable products, it is necessary for reasons of economy that the liquid-impermeable outer layer of the diaper, which forms the rear of the diaper and usually consists of a plastic layer, be made very thin. This will of course adversely affect the strength of the layer.
Usually a very thin layer of polyethylene is used with very low tear strength. The tape tabs are with an end portion securely joined to the corners at one end of the diaper, and the opposite end portion of the tape tabs is provided with an adhesive the adhesive capacity of which must be relatively high in order to make it pos-sible when putting the diaper on to fasten this tape portion using reasonable pressure to the liquid-impermeable outer layer at the other end of the diaper.
In practice it is proved necessary to use an adhesive the adhesive capacity of which exceeds the tear strength of the liquid-impermeable outer layer. This means in turn that it is practically impossible to correct an improperly ~
put-on diaper or to inspect the diaper without tearing the plastic layer apart in attempting -to loosen the tape.
A number of different attempts have been made to solve this problem. One method has been to reinforce the liquid-imperme-able layer, which layer consists, as was mentioned above, usually of a thin polyethylene layer, which because of its low surface weight is easily stretched and tears when pulled.
It is true that one thereby achieves a diaper which, with respect to removal and refastening of tape, is better than diapers without reinforcemen~ of the tape fastening zone, but nevertheless, this solution is still far from satisfactory. The adhesive capacity of the tape is higher than the tear strength of the plas-tic layer, which means that fragments of the plastic layer can be torn off and stick to the tape when it is removed. This means of course that the adhesive capacity of the tape when refastened will be less than what it was from the beginning.
A further significant disadvantage of fastening the tape directly to the thin polyethylene layer is that the adhesion will be poor. Since it is out of the question to press the tape hard against the p~astic layer and thus against the infant, the adhesion will not be satisfactory, even though the tape per se has good adhesion. This is because of the fact that the thin plastic layer does not have a smooth surface but has an uneven surface. The thin polyethylene layer is not even initially smooth and even during the manufacturing of the diaper it is subjected to both pressure and heat treatment, causing additional surface unevenness.
3'7!~2 United States Patent 4 067 337 describes another method of approach-ing the problem caused by the thin liquid-impermeable plastic outer layer. This patent specification reveals a tape attachment arrange-ment, in which the adhesive surface oE the tape tabs has been divided into segments by means of a net applied on the adhesive surface itself. It is intended that the adhesion will be reduced thereby so that it will be less than the tear strength of the thin plastic layer. The disadvantage is of course tha-t the adhesion of the tape tabs can be easily reduced to such a degree that the adhesion will be unsatisfactory.
In a fastening arrangement on the market for disposable diapers of the type in question, removal and refastening of the tape means is achieved by making the tape means of several separate tape tabs adhering to each other. The first tape tab used is designed to remain on the diaper plastic when the diaper is loosened and the next tape tab is used for refastening the diaper. A fastening arrangement constructed in this manner will however, for obvious reasons, be complicated and expensive to manufacture. Furthermore, the number of refastenings is limited by the number of tape tabs adhering to each other.
According to the present invention however, an arrangement for disposable diapers of the type described by way of introduction has been achieved which completely eliminates the above-mentioned disadvantages.
The invention provides a disposable diaper put on by means of pressure-sensitive tape, comprising a liquid-permeable inner layer, 3~02 closest to the wearer during use of the diaper, a liquid-tight outer layer, an absorbent layer disposed between the inner and outer layers, tape tabs at one end of the diaper close to the corners of the diaper, with a portion permanently joined to the liquid-tight outer layer at said end, and at least one plastic strip, for fastening the tape tabs when putting the diaper on the wearer, mounted on the opposite end of the diaper and consisting of a material which is inelastic and has suitable properties for fastening of the tape tabs thereto as well as removal and refasten-ing thereof, the plastic strip being elongated transversely of the diaper to permit adjustment of the fit of the diaper around the wearer by loosening and refastening of the tape tabs, said strip extending across the width of the diaper on the side of said liquid-tight outer layer that is away from the wearer, the tape tabs having adhesive on the side thereof that contacts said strip, said adhesive having a greater adhesion to the tabs than its adhesion to said strip, whereby said tabs with said adhesive there-on are releasable from and refastenable to said strip.
As regards the outer layer of the diaper, several requirements must be fulfilled. It must be soft and comfortable for the user and, since it is a disposable product, it must be thin and inexpensive.
It has previously not been possible to combine these requirements with good tape adhesion as well as good tape removal and refasten-ing.
By arranging one or more plastic strips on a thin plastic outer layer of the diaper for fastening the tape tabs, this or these strip(s) can be entirely adapted to the desired charaGteristics of L3~
~a the tape tab fastening as regards strength and adhesion.
The adhesion between the tape tabs and the special plastic strip(s) according to the invention can also be adapted as desired. It must not however be greater than -the cohesion of the adhesive if there is to be refastening capability. If one selects a smooth and even plastic strip, the adhesion will be great and one can then select tapes of lower quality than those used previously, making the product, the diaper, less expensive to manufacture.
The adhesion and refastening capacity of fastening tabs on a dis-posable diaper can thus now, by virtue of the invention, be optimized by selection of tape and type of plastic for the strip(s) to which the tape tabs are fastened, as well as by suitable treat-ment of the surfaces of the plastic strip(s). Attention must only be paid to adhesion and refastening. These characteristics can be easily controlled with advantage by for example different stamping of the plastic strip(s).
The plastic strip(s) can suitably be of material, preEer-ably polyethylene or polypropylene, haviny a tearstrength greater than that of the backside of the diaper plastic outer layer. By virtue of the fact that the plastic strip(s) according to the invention is(are) inelastic, there is no stretching when a tape tab attached thereto is pulled off.
A significant advantage over previously known fastening arrangements is that the tape tabs, by selecting surE~ce smoothness of the plastic strip(s) can be given suffi-cient adhesive grip even if the tape tabs are only pressed very weakly against this(these) strip(s).
The invention will be described in more detail below with reference to an example which is shown in the accompany-ing drawings. Fig 1 shows a diaper in a folded-out condi-tion provided with an arrangement according to the inven-tion. Fig 2 shows a tape tab in a larger scale and Fig 3 shows the diaper shown in Fig 1 in its condition for use.
In Fig 1, the absorbent body 1 has been indicated with dashed lines. It is surrounded by a liquid-permeable layer 2 of nonwoven textile which will be in contact with the user's body and by a liquid-tight thin layer 3 of polyethylene, which forms the backside of the diaper~
The two layers 2,3 extend laterally outside the absorbent body and are joined there to each other.
The tape tabs 4,5 are permanently mounted with one end on the plastic layer 3 at one end 8, the rear end, of the diaper on the side flaps 6,7. At -the opposite end 9 of the diaper, the front end, a nonelastic and smooth plastic strip 10 of polyester is mounted, which is glued securely to the liquid-tight layer 3 constituting -the backside of the diaper.
Fig 2 shows a tape tab in the folded-up condition before L370~2 use. It has a first portion 11, which is coated with an adhesive and is permanen-tly fixed to the plastic layer 3.
The midportion 12 is however not coa-ted with adhesive, but is instead coated with a release agent so that the third portion 13 of the tape flap, which is coated with adhesive, can, as shown at the Figure, be folded-in over the midportion 12 for detachable contact therewith.
Finally, an end portion 14 of the tape tab is folded over itself to form a grip.
When the diaper is in the condition of use as shown in Fig 3, the side flaps 6,7 of the rear end 8 of -the diaper overlap the lateral portions of the front end 9 of the diaper. The third adhesive-coated tape portions 13 of the tape tabs 4,5 are pressed against the plastic strip 10 fixed to the backside of the front end of the diaper to fasten the diaper to the user. The adhesive tape portions 13 even with very little pressure, achieve a good grip on the smooth plastic strip, which can be a polyester strip for example. Since this plastic strip is inelastic, it does not stretch when the tape tabs are pulled off. The tape tabs can be easily removed wi-thout risk that the plastic strip will stre-tch and be broken, which is however a common occurrence in previously known diapers, where the tape tabs are fixed directly to the thin polyethylene layer serving as -the backside to the diaper.
A suitable material for the plastic strip 10 is also polypropylene.
The manufacture of diapers provided with an arrangemen-t according to the inven-tion is suitably done with the diapers lying transversely to the manufac-turing line, making it particularly easy to apply the plastic strip 10.
It is then possible to allow it -to extend across the entire front end 9 of the diaper so that the strip can be ~Z~L3702 applied continuously. It is however not necessary that the thin polyethylene layer covers the en-tire bac~side of the diaper; rather it is sufficient that the plastic strip 10 and the polyethylene layer 3 overlap at the front end 9 of the diaper.
The plastic strip 10 serving as a fastening zone for the tape tabs 4,5 and extending over the front end of the diaper, will in practice function as a sort of belts for the diaper which is essentially only subjected to longitudinal stresses. It is thus not necessary to fix the strip 10 to the diaper along its entire surface.
In the example described above, the plastic strip for fastening of the tape tabs in accordance with the invention is assumed to have a smooth and even surface.
This provides the strongest adhesion, but when one must also take into account tape quality and refastening possibilities, it can be suitable to emboss the plastic strip to obtain optimum characteristics.
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
Priority Applications (2)
|Application Number||Priority Date||Filing Date||Title|
|Publication Number||Publication Date|
|CA1213702A true CA1213702A (en)||1986-11-11|
Family Applications (2)
|Application Number||Title||Priority Date||Filing Date|
|CA 439590 Expired CA1213702A (en)||1982-10-25||1983-10-24||Disposable diaper with refastenable tabs|
|CA 552675 Expired CA1239752B (en)||1982-10-25||1987-11-24||Disposable diaper with refastenable tabs|
Family Applications After (1)
|Application Number||Title||Priority Date||Filing Date|
|CA 552675 Expired CA1239752B (en)||1982-10-25||1987-11-24||Disposable diaper with refastenable tabs|
Country Status (11)
|US (1)||US5024672A (en)|
|JP (1)||JPH0532064B2 (en)|
|BE (1)||BE898071A (en)|
|CA (2)||CA1213702A (en)|
|DE (2)||DE3338201C2 (en)|
|DK (1)||DK161665C (en)|
|ES (1)||ES275193Y (en)|
|FI (1)||FI76681C (en)|
|FR (1)||FR2534781B1 (en)|
|GB (1)||GB2129689B (en)|
|NL (1)||NL8303666A (en)|
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|US4014339A (en) *||1976-03-12||1977-03-29||Johnson & Johnson||Diaper with collapsible adhesive tab fastener|
|US4050462A (en) *||1976-03-29||1977-09-27||Kimberly-Clark Corporation||Disposable diaper with elastically constricted crotch section|
|US4186744A (en) *||1976-07-29||1980-02-05||Johnson & Johnson||Separability member to allow disposable diaper openings and re-fastenings|
|US4047530A (en) *||1976-08-19||1977-09-13||Colgate-Palmolive Company||Disposable diaper with fastener retained end barrier|
|US4050463A (en) *||1976-08-20||1977-09-27||Colgate-Palmolive Company||Diapers|
|JPS567708B2 (en) *||1976-09-10||1981-02-19|
|US4055183A (en) *||1976-10-04||1977-10-25||Weyerhaeuser Company||Disposable diaper with cutout pad at tape attachment area|
|US4111205A (en) *||1977-02-22||1978-09-05||Avery International Corporation||Refastenable diaper tab closure|
|US4178933A (en) *||1977-03-23||1979-12-18||Avery International Corporation||Extractive transfer diaper tab means|
|JPS543851A (en) *||1977-06-10||1979-01-12||Tsutomu Tomohiro||Nonadhesive sheet and film|
|US4227530A (en) *||1977-08-29||1980-10-14||Scott Paper Company||Method of employing reclosable fastener tape system|
|US4210144A (en) *||1978-09-18||1980-07-01||The Procter & Gamble Company||Disposable diaper having refastenable tape system|
|JPS5575608U (en) *||1978-11-15||1980-05-24|
|JPS5575608A (en) *||1978-12-02||1980-06-07||Ricoh Co Ltd||Film thickness measuring unit|
|US4296750A (en) *||1979-06-22||1981-10-27||Kimberly-Clark Corporation||Refastenable pressure-sensitive tape closure system for disposable diapers and method for its manufacture|
|JPS5826963Y2 (en) *||1979-06-29||1983-06-11|
|US4299223A (en) *||1980-05-21||1981-11-10||3 Sigma Inc.||Tape tab fastener for disposable diaper|
|FR2490462B1 (en) *||1980-09-23||1983-09-09||Boussac Saint Freres Bsf|
|DE3036289A1 (en) *||1980-09-26||1982-06-03||Hoechst Ag||A process for the production of biaxially stretched and embossed films from vinyl chloride polymers|
|JPS5774910U (en) *||1980-10-20||1982-05-08|
|US4402690A (en) *||1980-10-21||1983-09-06||Robin Redfern||High absorbency, contoured, reusable diaper|
|US4369786A (en) *||1981-01-26||1983-01-25||Avery International Corporation||Refastenable adhesive closure for disposable diapers or briefs|
|GB2091986B (en) *||1981-01-29||1984-08-22||Uni Charm Corp||Tape fastening system for diaper|
|US4578071A (en) *||1981-02-24||1986-03-25||The Procter & Gamble Company||Disposable absorbent article having an improved liquid migration resistant perimeter construction|
|DE3238490A1 (en) *||1981-10-27||1983-05-05||Colgate Palmolive Co||tape|
|FR2516757B1 (en) *||1981-11-25||1984-10-26||Boussac Saint Freres Bsf|
|US4436520A (en) *||1981-12-21||1984-03-13||Exxon Research & Engineering Co.||Low gloss films of enhanced adhesion|
|US4540415A (en) *||1982-02-12||1985-09-10||Personal Products Company||Disposable diaper with a repositionable tape tab fastener|
|JPS58203101A (en) *||1982-05-19||1983-11-26||Daio Seishi Kk||Disposable diaper|
|JPH0421533Y2 (en) *||1982-11-25||1992-05-18|
|JP5575608B2 (en)||2010-11-02||2014-08-20||株式会社パイロットコーポレーション||Aqueous-based ink composition for a ballpoint pen|
Also Published As
|Publication number||Publication date||Type|
|US5807371A (en)||Extensible tape and absorbent article|
|US5961761A (en)||Process of providing mechanical fasteners on disposable absorbent articles|
|US5897547A (en)||Absorbent article with elastically extensible landing member|
|US6197012B1 (en)||Disposable wearing article|
|US5797896A (en)||Disposable absorbent article having a landing member for engaging with a hook-type fastening member|
|EP1600132A1 (en)||Disposable absorbent article with adjustable and prefastening tape|
|US5242436A (en)||Absorbent article with fastening system providing dynamic elasticized waistband fit|
|US5019065A (en)||Disposable absorbent article with combination mechanical and adhesive tape fastener system|
|US6945968B2 (en)||Fastening system for an absorbent product|
|US20010041879A1 (en)||Absorbent articles having improved fastening system|
|US5785699A (en)||Disposable absorbent article having a backsheet and an inner layer projecting beyond the front transverse edge of the backsheet for engaging with a mechanical fastening member|
|US4610685A (en)||Fibrous web with reinforced marginal portions, method for making the same and absorbent article incorporating the same|
|US7371302B2 (en)||Method for forming fastening members|
|US5795350A (en)||Disposable absorbent article having a mechanical fastener|
|US5019072A (en)||Disposable diaper that is fastened by contact between overlapping adhesive patches|
|US6544242B1 (en)||Disposable body fluids absorbent article|
|US6371949B1 (en)||Disposable body fluids absorbent garment with disposal securing means|
|US20080281286A1 (en)||Composite Web, Disposable Diaper and Process for Manufacturing Thereof|
|US6264644B1 (en)||Disposable body fluid absorbent article having disposable securing means|
|US6340782B1 (en)||Method of securing an elastic band and an article that includes such an elastic band|
|EP0233704B1 (en)||Disposable diaper having wide tapered fastening tapes|
|US5921977A (en)||Disposable absorbent article having an extensible landing member for engaging with a hook-type fastening member|
|US5549591A (en)||Adhesive/mechanical fastener systems for disposable articles|
|WO1994009736A1 (en)||Disposable diaper with fully elasticized waist opening|
|US20040082933A1 (en)||Absorbent articles having improved fastening system|