IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0754036
(2007-05-25)
|
등록번호 |
US-7812062
(2010-11-01)
|
발명자
/ 주소 |
- Strandburg, Gary M.
- VanSumeren, Mark W.
- Wu, Shaofu
- Stockton, Luther E.
|
출원인 / 주소 |
- Dow Global Technologies, Inc.
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인용정보 |
피인용 횟수 :
6 인용 특허 :
50 |
초록
▼
Olefin polymer-based, durable, open-cell foam compositions, structures and articles derived from same; methods for preparation of such foams; and use of the dry durable foams in various applications are disclosed. Further described is use of the foams and structures and articles made of same in abso
Olefin polymer-based, durable, open-cell foam compositions, structures and articles derived from same; methods for preparation of such foams; and use of the dry durable foams in various applications are disclosed. Further described is use of the foams and structures and articles made of same in absorption, filtration, insulation, cushioning and backing applications, and in particular for odor removal, hygiene and medical applications due to, among other properties, good absorption capabilities, softness and/or flexibility of the foams and their recyclable nature.
대표청구항
▼
The invention claimed is: 1. An absorbent article selected from a baby diaper, a feminine hygiene product, an adult incontinence hygiene product, a wound dressing pad, a surgical sponge, a food packaging pad, a wiping towel and a wiping sponge, where the article comprises a durable, open-cell foam
The invention claimed is: 1. An absorbent article selected from a baby diaper, a feminine hygiene product, an adult incontinence hygiene product, a wound dressing pad, a surgical sponge, a food packaging pad, a wiping towel and a wiping sponge, where the article comprises a durable, open-cell foam comprising a) one or more copolymers or interpolymers of ethylene and/or 1-propene, with or without other monomers selected from C4 to C10 olefins, and which has an ethylene or 1-propene content from about 2-98 weight percent, wherein said cell size of the majority of cells at a first major surface of the foam ranges between about 20 and about 100 microns and the cell size of the majority of cells at the other major surface of the foam ranges between about 200 and about 1100 microns. 2. A laminated structure comprising at least one first layer comprising a durable, open-cell foam comprising a) one or more copolymers or interpolymers of ethylene and/or 1-propene, with or without other monomers selected from C4 to C10 olefins, and which has an ethylene or 1-propene content from about 2-98 weight percent, wherein said cell size of the majority of cells at a first major surface of the foam ranges between about 20 and about 100 microns and the cell size of the majority of cells at the other major surface of the foam ranges between about 200 and about 1100 microns and at least one substrate layer to which said first layer is adhered. 3. The laminated structure of claim 2 wherein said substrate layer is selected from a layer of a second open-cell foam, a thermoplastic sheet or film, a woven or non-woven fabric, or melt spun-bonded or melt-blown material. 4. The absorbent article according to claim 1, wherein said foam further characterized by having a plurality of its cells being substantially ellipsoidal in shape and the major axis of same being generally aligned in a parallel fashion with at least one major surface of the foam. 5. The absorbent article according to claim 4, wherein said foam further characterized by having a majority of its cells being substantially ellipsoidal in shape. 6. The absorbent article according to claim 4, wherein said foam further characterized by exhibiting a vertical wicking height, for a 0.9% aqueous saline solution after 5 minutes, of 8 cm or greater. 7. The absorbent article according to claim 1, wherein component a) polymer of said foam exhibits a melt index (as determined by ASTM D1238 condition 190 deg C./2.16 kg) for ethylene-based polymers between about 0.5 and about 30 g/10 min and a melt flow rate (as determined by ASTM D1238 condition 230 deg C./2.16 kg) for 1-propene-based polymers between about 0.7 and about 85 g/10 min. 8. The absorbent article according to claim 1, wherein component a) comprises at least one copolymer of ethylene with an alpha-olefin comonomer of from 3 to 8 carbon atoms. 9. The absorbent article according to claim 1, wherein said component a) comprises an ethylene copolymer with 1-propene, 1-butene, 1-hexene or 1-octene, and which copolymer exhibits a melt index (as determined by ASTM D1238 condition 190 deg C./2.16 kg) of between about 0.5 and about 30 g/10 min. 10. The absorbent article according to claim 1, wherein said component a) comprises an ethylene copolymer with 1-butene or 1-octene, and which copolymer exhibits a density of between 0.85 and 0.91 g/cc. 11. The absorbent article according to claim 1, wherein said cell size of the majority of cells at the first major surface of the foam ranges between about 30 and about 80 microns and the cell size of the majority of cells at the other major surface of the foam ranges between about 300 and about 1000 microns and a gradient in cell size exists between the two said major surfaces of the foam. 12. The absorbent article according to claim 1, wherein said component a) comprises at least one copolymer of ethylene and 1-propene and 1-propene comprises 2 to 35 weight percent of the copolymer. 13. The absorbent article according to claim 1, wherein said component a) comprises at least one copolymer of 1-propene and ethylene, and ethylene comprises 2 to 35 weight percent of the copolymer. 14. The absorbent article according to claim 1, wherein said a) comprises an ethylene copolymer with 1-octene, the copolymer exhibits a melt index (as determined by ASTM D1238 condition 190 deg C./2.16 kg) of between 1 and 20 g/10 min, a density of between 0.85 and 0.91 g/cc and a cell size gradient of the major portion of cells between one of the major surfaces of the foam and the other major surface exists and ranges between about 20 and about 1100 microns. 15. The absorbent article according to claim 1, wherein said faom further comprises at least one additive selected from calcium carbonate powder, titanium dioxide powder, polymer particles, hollow glass spheres, cellulose fibers, polymeric staple fibers and film-forming polymers. 16. The absorbent article according to claim 1, wherein said foam further comprises one or more of an antioxidant, alkylcellulose ether, hydroxyalkylcellulose ether, hydroxyalkyl alkylcellulose ether, styrenic latex, guar gum or xanthan gum. 17. The absorbent article according to claim 1, wherein said foam further comprises a multiplicity of particles of at least one odor absorbing particulate material, the average size of such particles being between about 1 and about 600 microns, and said multiplicity of particles comprising about 2 to about 18 percent by weight of the polymeric components of said foam. 18. The absorbent article according to claim 1, wherein said particles of the at least one odor absorbing particulate material are particles of activated charcoal which have an average particle size of from 100 to 200 microns, and comprise from 4 to 12 percent by weight of the polymeric components of said foam. 19. The absorbent article according to claim 1, wherein said foam having at least one surface of which has a fabric-like, soft hand.
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