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
• • 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

Definitions

• This invention relates to disposable diapers provided with adhesive tab fasteners, and particularly tab fasteners of the extensible type useful for diaper closure and in other applications.
• Extensible diaper tabs have previously been proposed as a means to improve the fit of the diaper by utilizing the diaper tabs as elastic extensible side waistbands.
• the present invention provides stabilizing means for preventing premature extension of an extensible diaper tab, but without reliance on use of a weakened joint which must be counted on to hold or part under stress according to the circumstances. Instead, the configuration of the tab is such that the stretchy tab material is freed to stretch only when the tab is deployed for diapering. Prior to that time, the stretchy tab material remains fastened at back ends to nonextensible means at all times before, during, and after application of the tab.
• FIG. 1 is a diagrammatic transverse elevation of diaper tab stock constructed according to the invention and then cut transversely to machine direction (machine direction being into the paper) to tliereby form an individual tab.
• FIG. 2 is a view of the tab shown in FIG. 1, folded and fastened around one portion of a diaper by the diaper manufacturer.
• FIG. 3 is a view of the same tab now deployed for diapering.
• FIG. 4 is a sketch on a much smaller scale of a diaper fastened with a pair of the tabs.
• FIG. 5 shows an alternative form of the invention.
• FIG. 6 shows still another alternative.
• FIG. 7 is a more detailed view of the indicated portion of FIG. 6.
• FIG. 1 is cut from a continuous tape of diaper tab stock, and FIG. 1 is, in effect, a diagrammatic cross-sectional view of such diaper tab stock as well as an elevational view of a single tab.
• the diaper tab stock consists of initially flat but flexible layers suitable to be formed in long passes along the machine direction (into or out of the paper as seen in FIG. 1) of a coating and laminating line.
• These layers include an unwind release coating 1, a carrier web layer 2, a layer of pressure-sensitive adhesive 3, a layer of stretchable or extensible web 4 such as polyurethane film, a layer of pressure-sensitive adhesive 5, a liner web 7 of nonextensible material such as paper and provided along a segment on one face with suitable release means such as the release coating 6, and a layer of pressure-sensitive adhesive 8.
• an unwind release coating 1 a carrier web layer 2
• a layer of pressure-sensitive adhesive 3 such as polyurethane film
• a layer of pressure-sensitive adhesive 5 such as polyurethane film
• a liner web 7 of nonextensible material
• suitable release coating 6 such as the release coating 6
• Adhesive layers 3 and 5 have essentially no mechanical strength, and it is not necessary to interrupt them as shown, but doing so tends to improve the neatness of the deploying action, which will be described below.
• Tab 10 comprises first and second terminal segments generally indicated at 11 and 12 and a central segment between segments 11 and 12 and at and surroundingintermediate point 20. It will be noted that both layers 4 and 7 are uninterrupted and that extensible layer 4 is adhered to nonextensible layer 7 at both terminal segments 11 and 12. At the first terminal segment 11, such adherence is permanent. At the second terminal segment 12, such adherence is releasable, due to the presence of the release coating 6 on the nonextensible layer 7.
• FIG. 2 shows the tab of FIG. 1 placed around an edge or side margin of a diaper 15.
• layers 1-5 are relatively spaced from diaper 15.
• These layers 1-5 comprise outer layer means, while layers 7 and 8 comprise inner layer means which are adjacent the diaper and are permanently adhered to opposite sides of the diaper side margin at the terminal segments 11 and 12.
• the outer layer means 1-5 will be seen to be permanently adhered to the inner layer means 7,8 at the first terminal segment 11 and releasably adhered thereto at the second terminal segment 12.
• the second terminal segment 12 is on the inner side 15a of the diaper 15.
• the inner layer means is nonextensible because it includes the nonextensible layer 7 and this nonextensibility is Imparted to the outer layer means 1-5 so long as the latter is adhered to the inner layer means at both terminal segments 11 and 12.
• the tab construction is nonextensible in the conditions shown in both FIGS. 1 and 2.
• the outer layer means 1-5 are released from the inner layer means 7-8 at the second terminal segment 12 to thereby expose and present the adhesive layer 5 at the second terminal end for fastening to another portion of the diaper (not shown in FIG. 3).
• the outer layer means 1-5 is no longer stabilized against extension because now the only significant mechanical connection between the terminal segments of the outer layer means is the extensible layer 4. This conversion from the nonextensible to the extensible state is accomplished simply by the releasing of the outer layer means from the inner layer means at the terminal segment 12, and without having to rely on satisfactory breakability of a joint or other element.
• FIG. 4 shows the diaper 15 as wrapped on an infant (not shown) with two of the tabs 10 fastening the diaper after tab deployment in the manner shown in FIG. 3.
• FIG. 5 shows an alternative construction which is generally similar to the previously described construction, except that the positions of the carrier layer 2b and the stretchable layer 4b have been exchanged, so that the stretchable layer becomes the top layer of the sandwich (except for release coat 1) instead of a center layer as in FIGS. 1-3.
• FIGS. 6 and 7 show a modification which is generally similar to the tab 10 of FIGS. 1-3, except that instead of a single slit in the non-stretchy carrier layer 2 at point 20 as in FIG. 1, several parallel slits are provided, so that between the parallel slits antistretch microanchors 2c are formed from small portions of the relatively non-stretchy carrier layer 2.
• the adhesive layer 3 is not interrupted at intermediate point 20, but instead serves at this point to adhere the micro- anchors 2c to the extensible layer 4. This arrangement desirably tends to stabilize the extensible layer 4 so as to limit and control the stretching action if it is otherwise somewhat more "loose" than is most desirable.
• the adhesive layer 3 need not be a pressure-sensitive adhesive, and may be a "permanent" adhesive or may be simply a heat-sealed or welded interface be tween layers 2 and 4 ( in te r rup ted a t Loca t ion 20 ) .
• the invention can be used in a construction which provides a separable section that is left behind on that part of the diaper from which the tab is peeled when the diaper is opened after fastening, thus providing a "landing" or “target” for improving the reclosability of the diaper, as shown in U.S. Patent 4,020,842 of common assignee.
• the invention can also be used in other applications where there is need for tab fasteners of the extensible type, such as surgical drapes, surgical gowns, disposable garments, sheets, cartons, envelopes or the like.

Landscapes

• Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Life Sciences & Earth Sciences (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)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25282358

Family Applications (1)

Country Status (8)

Cited By (5)

Citations (3)

Family Cites Families (2)

• 1987
  • 1987-03-11 WO PCT/US1987/000520 patent/WO1987005471A1/en not_active Application Discontinuation
  • 1987-03-11 JP JP62501783A patent/JPS63502841A/ja active Pending
  • 1987-03-11 BR BR8706043A patent/BR8706043A/pt unknown
  • 1987-03-11 EP EP19870902010 patent/EP0264387A4/en not_active Withdrawn
  • 1987-03-11 AU AU71269/87A patent/AU588193B2/en not_active Ceased
  • 1987-03-12 CA CA000531857A patent/CA1289300C/en not_active Expired - Lifetime
  • 1987-03-13 ZA ZA871842A patent/ZA871842B/xx unknown
  • 1987-10-21 KR KR1019870700960A patent/KR880700645A/ko not_active Application Discontinuation

Patent Citations (3)

Non-Patent Citations (1)

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