Elastic member for a garment having improved gasketing
Various garments are disclosed which include a body adhesive for attaching the garment to the skin of a wearer. More particularly, the garment can include at least one extensible portion. An adhesive member comprising an adhesive layer and a cover member may be positioned over the extensible portion. The cover member may completely cover the adhesive layer when the extensible portion is in a relaxed condition. When the extensible portion is stretched, however, the cover member may define openings that expose the adhesive layer for adhering the adhesive to a wearer. The garment may comprise, for instance, a diaper, a training pant, a swim pant, a hospital gown, an industrial garment, a glove, a feminine hygiene product, an adult incontinence product, and the like. The adhesive member can be positioned over any suitable extensible portion on the garment.
1. A garment comprising:
a chassis having a shape configured to surround a portion of a wearer's body, the chassis including a front portion and a back portion and an inner surface that is placed adjacent to the wearer's body and an outer surface wherein the chassis defines at least a front inner surface and a back inner surface;
an extensible portion that permits the chassis to expand in an area for providing the chassis with a form fitting property around a portion of a wearer's body;
an adhesive member positioned on the back inner surface of the chassis and over the extensible portion, the adhesive member including an adhesive layer applied over the extensible portion and a cover member wherein the cover member is adjacent to the wearer's skin, the cover member substantially covering the adhesive layer and wherein, when the extensible portion is stretched in a lateral direction, the cover member defines openings facing the wearer's skin that expose the adhesive layer to the wearer's body; and
wherein the adhesive layer of the adhesive member has low tack and a peel strength of no more than about 140 grams per centimeter of width and is configured to provide a cyclic shear value of no more than about 100 cycles, such that the adhesive will detach during use from the wearer's body after initial application.
2. A garment as defined in claim 1 , wherein the garment comprises an absorbent article that includes an outer cover, an absorbent core, and a liner, the absorbent core being positioned between the outer cover and the liner, the liner defining the inner surface.
3. A garment as defined in claim 2 , wherein the absorbent article, when positioned on a wearer's body, includes first and second leg openings and a waist opening, the extensible portion surrounding the waist opening.
4. A garment as defined in claim 2 , wherein the absorbent article, when positioned on a wearer's body, includes first and second leg openings and a waist opening, the extensible portion is positioned around at least one of the leg openings.
5. A garment as defined in claim 2 , wherein the absorbent article comprises a feminine care pad.
6. A garment as defined in claim 1 , wherein the extensible portion comprises a cuff.
7. A garment as defined in claim 1 , wherein the extensible portion comprises an elastic laminate.
8. A garment as defined in claim 7 , wherein the elastic laminate comprises a stretch bonded laminate.
9. A garment as defined in claim 1 , wherein the cover member comprises a nonwoven web.
10. A garment as defined in claim 1 , wherein the cover member comprises a spunbond web.
11. A garment as defined in claim 1 , wherein the cover member defines a plurality of apertures or slits that define the openings when the extensible portion is stretched.
12. A garment as defined in claim 11 , wherein the cover member has a length that is generally parallel with the apertures or slits, the apertures or slits only extending over a portion of the length, the slits having a length from about 3 mm to about 12 mm.
13. A garment as defined in claim 12 , wherein the apertures or slits are spaced apart a distance of from about 3 mm to about 10 mm.
14. A garment as defined in claim 11 , wherein the apertures or slits have a length that is from about 20 percent to about 80 percent of the height of the cover member.
15. A garment as defined in claim 11 , wherein, when the extensible portion undergoes a 30 percent elongation, the apertures or slits form the openings that have a total surface area of from about 5 to about 100 mm 2 .
16. A garment as defined in claim 11 , wherein the slits or apertures are arranged in columns over the cover member, each column containing a plurality of apertures or slits.
17. A garment as defined in claim 1 , wherein the extensible portion comprises an elastic film upon which the adhesive layer is disposed.
18. A garment as defined in claim 1 , wherein the adhesive layer of the adhesive member comprises a silicone, an acrylic, a polyurethane, a polyester, a polyamide, a styrene butadiene, a polyisobutylene, a polybuadiene, a polyisoprene, a polyvinyl alcohol, a polyvinyl acetate, a methyl cellulose, a styrene-butadiene-styrene, a styrene-isoprene-styrene, a styrene-ethylenepropylene-styrene, a styrene-ethylenepropylene-styrene-ethylenepropylene, a styrene-ethylene butylene-styrene, or mixtures thereof.
19. A garment as defined in claim 1 , wherein the adhesive layer of the adhesive member defines a shear storage modulus of from about 1.0 ×10 3 to about 6.0×10 6 dynes per square centimeter as measured at a temperature of 20° C. and at a frequency of 10 radians per second.
20. A garment as defined in claim 1 , wherein the adhesive layer of the adhesive member is configured to provide an initial shear strength of no more than about 600 grams per square centimeter.
21. A garment as defined in claim 1 , wherein the adhesive layer of the adhesive member is configured to provide an aged shear strength of no more than about 500 grams per square centimeter.
22. A garment as defined in claim 1 , wherein the adhesive layer comprises a plurality of discrete adhesive areas, the adhesive areas being position only beneath the openings defined by the cover member.
23. A garment as defined in claim 1 , wherein the adhesive member is positioned on a flap positioned on the back inner surface of the chassis and over the extensible portion such that when the extensible portion is stretched in a lateral direction, the cover member on the flap defines openings facing the wearer's skin that expose the adhesive layer to the wearer's body.