Self-adhering absorbent article

• US 6,213,993 B1
• Filed: 06/07/1996
• Issued: 04/10/2001
• Est. Priority Date: 10/28/1994
• Status: Expired due to Term

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Zacharias, Duane Kenneth, Huang, Yung Hsiang, Druecke, Frank Gerald
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): SHANOSKI, PAUL A
• Application Number:
  US08/659,858
• Time in Patent Office: 1,768 Days
• Field of Search: 604/386, 604/387, 604/389, 604/390
• US Class Current: 604/386
• CPC Class Codes: A61F 13/5611 using fastening strips, e.g. adhesive, on the undergarment-facing side
• CPC Class Codes: A61F 13/82 with means for attaching to the body
• CPC Class Codes: A61F 2013/00659 polymeric base
• CPC Class Codes: A61F 2013/00663 acrylic
• CPC Class Codes: A61F 2013/00697 elastomer-, e.g. rubber- based
• CPC Class Codes: A61F 2013/583 with strips on several places
• CPC Class Codes: A61F 2013/585 being spot like
• CPC Class Codes: A61F 2013/8491 including test methods

Abstract

An absorbent article is provided having an adhesive on the bodyfacing surface for securement of the article to the wearer. The adhesive has a rheological property tan δ at 20° C. ranging from about 0.01 to about 0.6 at a frequency of about 0.1 radian per second and a tan δ ranging from about 0.1 to about 1.7 at a frequency of about 1000 radians per second. Preferably the adhesive is a hot melt adhesive.

Claims

1. An absorbent article comprising:

a) a cover having a bodyfacing surface with a predetermined area and a garmentfacing surface;

b) an absorbent core adjacent to said garmentfacing surface of said cover; and

c) a hot melt, pressure sensitive adhesive secured to less than about 90 percent of said bodyfacing area, said adhesive selected from the group consisting A-B-A block copolymers and A B-B-A block copolymors, wherein A is a block polymer of mono-vinyl substituted aromatic hydrocarbon and B is an elastomeric block polymer of a conjugated diene and having a Lan δ

at a frequency of about 0.1 radians per second to about 1000 radians per second residing inside a quadrangle ABCD wherein said quadrangle ABCD is defined by graphically plotting frequency in radians per second verse tan δ

referenced to about 20°

Centigrade of said adhesive, said quadrangle ABCD having as points A and D a tan δ

of about 0.06 and 0.4 respectively at a frequency of about 0.1 radians pet second and points B and C at a tan δ

of about 0.1 and about 1.7 respectively at a frequency of about 1000 radians per second.

2. The absorbent article of claim 1 wherein said adhesive is secured to less than about 70 percent of said area.

3. The absorbent article of claim 1 wherein said adhesive is secured to less than about 20 percent of said area.

4. The absorbent article of claim 1 wherein said adhesive is symmetrical about an axis wherein said axis bisects said absorbent article into substantially equal portions.

5. The absorbent article of claim 4 wherein said adhesive has a peel force ranging from about 50 grams to about 750 grams at a peel rate of about 50 millimeters per minute to about 3500 millimeters per minute.

6. The absorbent article of claim 1 wherein said adhesive includes an array of independent adhesive members, said members each having a surface area between about 0.03 cm² to about 20 cm² and a thickness of about 0.01 millimeters to about 2 millimeters.

7. An absorbent article comprising:

a) a cover having a bodyfacing surface with a predetermined area and a garmentfacing surface;

b) an absorbent core adjacent to said garmentfacing surface of said cover; and

c) a hot melt, pressure sensitive adhesive secured to less than about 90 percent of said bodyfacing area, said adhesive having a tan δ

at a frequency of about 0.1 radians per second to about 1000 radians per second residing inside a quadrangle ABCD wherein said quadrangle ABCD is defined by graphically plotting frequency in radians per second verse Lan δ

referenced to about 20°

Centigrade of said adhesive, said quadrangle ABCD having as points A and D a tan δ

of about 0.06 and 0.4 respectively at a frequency of about 0.1 radians pet second and points B and C at a tan δ

of about 0.1 and about 1.7 respectively at a frequency of about 1000 radians per second, and said adhesive having a primary transition frequency peak greater than about 1000 radians per second.

8. An absorbent article comprising:

a) a cover having a bodyfacing surface with a predetermined area and a garmentfacing surface;

b) an absorbent core adjacent to said garmentfacing surface of said cover; and

c) a hot melt, pressure sensitive adhesive secured to less than about 90 percent of said bodyfacing area, said adhesive having a tan δ

at a frequency of about 0.1 radians per second to about 1000 radians per second residing inside a quadrangle ABCD wherein said quadrangle ABCD is defined by graphically plotting frequency in radians per second verse tan δ

referenced to about 20°

Centigrade of said adhesive, said quadrangle ABCD having as points A and D a tan δ

of about 0.06 and 0.4 respectively at a frequency of about 0.1 radians pet second and points B and C at a tan δ

of about 0.1 and about 1.7 respectively at a frequency of about 1000 radians per second, and said adhesive having a secondary peak between a frequency range of about 0.1 and about 1000 radians per second.

9. An absorbent article comprising:

a) a cover having a bodyfacing surface with a predetermined area and a garmentfacing surface;

b) an absorbent core adjacent to said garmentfacing surface of said cover; and

c) a hot melt, pressure sensitive adhesive secured to less than about 90 percent of said bodyfacing area, said adhesive selected from the group consisting of block copolymers of styrene-butadiene-styrene, styrene-isoprene-styrene, styrene-ethylenepropylene-styrene, styrene-ethylenebutylene-styrene, and styrene-ethylenepropylene-styrene-ethylenepropylene and having a tan δ

at a frequency of about 0.1 radians per second to about 1000 radians per second residing inside a quadrangle ABCD wherein said quadrangle ABCD is defined by graphically plotting frequency in radians per second verse tan δ

referenced to about 20°

Centigrade of said adhesive, said quadrangle ABCD having as points A and D a tan δ

of about 0.06 and 0.4 respectively at a frequency of about 0.1 radians pet second and points B and C at a tan δ

of about 0.1 and about 1.7 respectively at a frequency of about 1000 radians per second.