Disposable absorbent article including an elasticized area

Details Disposable absorbent article including an elasticized area Disposable absorbent article including an elasticized area

1997-08-15

2001-06-12

Ruhl, Dennis (Department: 3761)

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

C604S386000, C604S387000, C604S389000, C604S390000, C604S385230

Reexamination Certificate

active

06245050

ABSTRACT:

BACKGROUND OF THE INVENTION
The use of elastomeric materials to form elasticized areas in the design and construction of disposable absorbent articles is well known. Typically, such elasticized areas are formed by bonding elastomeric materials, such as natural or synthetic rubber, to the other components from which such disposable absorbent articles are formed. Generally, the elastomeric materials will be bonded to the absorbent article while the elastomeric materials are in a stretched condition. Upon relaxation, the elastomeric materials will operate to gather the components of the disposable absorbent articles to which they are attached. In this manner, elastomeric leg cuffs and waist gathers can be formed.
Attaching elastomeric materials to a disposable absorbent article while said elastomeric materials are in a stretched condition may be, from a manufacturing perspective, a difficult step to accomplish. Moreover, such elastomeric materials are typically attached to the disposable absorbent article through the use of adhesives such as hot melt adhesives. The presence of such adhesive has been found to reduce or eliminate the retractive forces exerted by such elastomeric material in the area in which the adhesives contact the elastomeric material and the disposable absorbent article to which they are attached.
SUMMARY OF THE INVENTION
In one aspect, the present invention is directed to a disposable absorbent article having a length and a width and defining first and second waist portions and first and second longitudinal marginal portions. The absorbent article comprises the following components: a backsheet layer, a topsheet layer, and an absorbent structure located between said topsheet layer and said backsheet layer. The disposable absorbent article further includes at least one elasticized area formed from an elastomeric, hot melt, pressure-sensitive adhesive, a first component and a second component, said first and second components being adhered to one another by said elastomeric, hot melt, pressure-sensitive adhesive. The elastomeric, hot melt, pressure-sensitive adhesive and the elasticized area formed therewith have the following properties:
A. an adhesive bond strength sufficient to adhere said first and second components together during use of said disposable absorbent article;
B. an elongation of at least 50 percent;
C. a retractive force of less than 400 grams force per (4.54 cm (1.0 inch) width at 90 percent elongation;
D. a viscosity of less than 70,000 centipoise at 176.7° F.; and
E. a cold flow value of less than 20 percent at 54° C.


REFERENCES:
patent: 4024312 (1977-05-01), Korpman
patent: 4259220 (1981-03-01), Bunnelle et al.
patent: 4418123 (1983-11-01), Bunnelle et al.
patent: 4486192 (1984-12-01), Sigl
patent: 4543099 (1985-09-01), Bunnelle et al.
patent: 4627847 (1986-12-01), Puletti et al.
patent: 4692161 (1987-09-01), Puletti et al.
patent: 4696779 (1987-09-01), Wideman
patent: 4698242 (1987-10-01), Salerno
patent: 4704107 (1987-11-01), Coates
patent: 4718898 (1988-01-01), Puletti et al.
patent: 4719261 (1988-01-01), Bunnelle et al.
patent: 4761198 (1988-08-01), Salerno
patent: 4798603 (1989-01-01), Meyer et al.
patent: 4801485 (1989-01-01), Sallee et al.
patent: 4998928 (1991-03-01), Maletsky et al.
patent: 5032120 (1991-07-01), Freeland et al.
patent: 5037416 (1991-08-01), Allen et al.
patent: 5100398 (1992-03-01), Leroy et al.
patent: 5176668 (1993-01-01), Bernardin
patent: 5176672 (1993-01-01), Bruemmer et al.
patent: 5192606 (1993-03-01), Proxmire et al.
patent: 5376430 (1994-12-01), Swenson et al.
patent: 5415644 (1995-05-01), Enloe
patent: 5509915 (1996-04-01), Hanson et al.
patent: 2165486 (1996-06-01), None
patent: 0 368 141 A3 (1990-05-01), None
patent: 0 386 816 A3 (1990-09-01), None
patent: 0 630 630 A2 (1994-12-01), None
patent: WO 89/05334 A1 (1989-06-01), None
patent: 95/01408 (1995-01-01), None
patent: 95/05418 (1995-02-01), None
ASTM Test Method D3236—1998, “Standard Test Method for Apparent Viscosity of Hot Melt Adhesives and Coating Materials,” pp. 631-637.
PSTC Test Method PSTC-1 (Pressure Sensitive Tape Council)—“Peel Adhesion For Single Coated Pressure Sensitive Tapes At 180° Angle”, pp. 23-24.

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