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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0006825 (2001-12-05) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 28 인용 특허 : 301 |
The present invention is directed to ion-sensitive, water-dispersible fabric. The present invention is also directed to a method of making ion-sensitive, water-dispersible polymer formulations and their applicability as binder compositions for disposable items. The present invention is further direc
The present invention is directed to ion-sensitive, water-dispersible fabric. The present invention is also directed to a method of making ion-sensitive, water-dispersible polymer formulations and their applicability as binder compositions for disposable items. The present invention is further directed to disposable items, such as wet-wipes comprising ion-sensitive, water-dispersible binder.
1. A water dispersible fibrous fabric comprising:a fibrous substrate, wherein less than about 20% of the fibers comprising the fibrous substrate have a length of about 6-10 mm; anda water-dispersible binder; wherein said binder is an ion-sensitive composition comprising a sulfonate anion modified po
1. A water dispersible fibrous fabric comprising:a fibrous substrate, wherein less than about 20% of the fibers comprising the fibrous substrate have a length of about 6-10 mm; anda water-dispersible binder; wherein said binder is an ion-sensitive composition comprising a sulfonate anion modified polymer and a non-crosslinking poly(ethylene-vinyl acetate), wherein the composition is insoluble in a neutral salt solution containing at least about 0.3 weight percent salt, said salt comprising one or more monovalent ions;wherein said binder comprises about 5% to about 65% by weight of said fibrous fabric and said fibrous substrate comprising about 35% to about 95% by weight of said fibrous fabric; andwherein the fabric is dispersible in an aqueous environment containing up to about 200 ppm of one or more divalent and/or multivalent ions. 2. The water dispersible fibrous fabric of claim 1, wherein said binder comprises from about 5% to about 35% by weight of said fibrous fabric and said fibrous substrate comprises from about 65% to about 95% by weight of said fibrous fabric. 3. The water dispersible fibrous fabric of claim 1, wherein said fibers have a length of about 7-9 mm. 4. The water dispersible fibrous fabric of claim 1, wherein said fibers have a length of about 8 mm. 5. The water dispersible fibrous fabric of claim 1, wherein said binder comprises from about 5% by weight to about 25% by weight of said fabric. 6. The water dispersible fibrous fabric of claim 1, wherein said binder comprises from about 10% by weight to about 20% by weight of said fabric. 7. The water dispersible fibrous fabric of claim 1, wherein the binder is dispersible in water containing from about 15 ppm to about 150 ppm of one or more divalent and/or multivalent ions. 8. The water dispersible fibrous fabric of claim 1, wherein the binder is insoluble in a neutral salt solution containing from about 0.3 weight percent to about 5 weight percent salt. 9. The water dispersible fibrous fabric of claim 1, wherein the binder is insoluble in a neutral salt solution containing from about 1 weight percent to about 4 weight percent salt. 10. The water dispersible fibrous fabric of claim 1, wherein the divalent and/or multivalent ions comprise Ca 2+ ions, Mg 2+ ions, or a combination thereof. 11. The water dispersible fibrous fabric of claim 1, wherein the monovalent ions comprise Na + ions, Li + ions, K + ions, NH 4 + ions, or a combination thereof. 12. The water dispersible fibrous fabric of claim 1, wherein the sulfonate anion modified polymer is formed from monomers comprising at least one of acrylic acid or methacrylic acid, and one or more alkyl acrylates. 13. The water dispersible fibrous fabric of claim 1, wherein the sulfonate anion modified polymer is formed from at least four monomers selected from acrylic acid; 2-acrylamido-2-methyl-1-propanesulfonic acid and the alkali earth metal or organic amine salts thereof; butyl acrylate; and 2-ethylhexyl acrylate. 14. The water dispersible fibrous fabric of claim 1, wherein the sulfonate anion modified polymer is formed from at least four monomers selected from acrylic acid: AMPS; NaAMPS; butyl acrylate; and 2-ethylhexyl acrylate. 15. The water dispersible fibrous fabric of claim 1, wherein the sulfonate anion modified polymer comprises from about 35 to less than about 80 mole percent acrylic acid monomeric units; from greater than 0 to about 20 mole percent 2-acrylamido-2-methyl-1-propanesulfonic acid monomeric units and alkali earth metal or organic amine salts thereof; from greater than 0 to about 65 mole percent butyl acrylate monomeric units; and from greater than 0 to about 45 mole percent 2-ethylhexyl acrylate monomeric units. 16. The water dispersible fibrous fabric of claim 1, wherein the sulfonate anion modified polymer comprises from about 50 to less than about 67 mole percent acrylic acid monomeric units; from greater than 0 to about 10 mole percent 2-acrylamido-2-methyl-1-propanesulfon ic acid monomeric units and alkali earth metal or organic amine salts thereof; from about 15 to about 28 mole percent butyl acrylate monomeric units; and from about 7 to about 15 mole percent 2-ethylhexyl acrylate monomeric units. 17. The water dispersible fibrous fabric of claim 1, wherein the sulfonate anion modified polymer comprises from about 57 to less than about 66 mole percent acrylic acid monomeric units; from about 1 to about 6 mole percent 2-acrylamido-2-methyl-1-propanesulfonic acid monomeric units and alkali earth metal or organic amine salts thereof; from about 15 to about 28 mole percent butyl acrylate monomeric units; and from about 7 to about 13 mole percent 2-ethylhexyl acrylate monomeric units. 18. The water dispersible fibrous fabric of claim 1, wherein the composition comprises from about 55 to about 95 weight percent of the sulfonate anion modified polymer. 19. The water dispersible fibrous fabric of claim 1, wherein the composition comprises from about 65 to about 85 weight percent of the sulfonate anion modified polymer. 20. The water dispersible fibrous fabric of claim 1, wherein the composition comprises from about 5 to about 45 weight percent of the non-crosslinking poly(ethylene-vinyl acetate). 21. The water dispersible fibrous fabric of claim 1, wherein the composition comprises from about 15 to about 35 weight percent of the non-crosslinking poly(ethylene-vinyl acetate). 22. The water dispersible fibrous fabric of claim 1, wherein the sulfonate anion modified polymer comprises from about 57 to less than about 66 mole percent acrylic acid monomeric units; from about 1 to about 6 mole percent AMPS or NaAMPS monomeric units; from about 15 to about 28 mole percent butyl acrylate monomeric units; and from about 7 to about 13 mole percent 2-ethylhexyl acrylate monomeric units; and wherein the composition comprises from about 65 to about 80 weight percent of the sulfonate anion modified polymer and from about 20 to about 35 weight percent of the non-crosslinking poly(ethylene-vinyl acetate). 23. The water dispersible fibrous fabric of claim 1, wherein said fibrous material is a nonwoven fabric. 24. The water dispersible fibrous fabric of claim 1, wherein said fibrous material will disperse in water after no more than about 60 minutes. 25. The water dispersible fibrous fabric of claim 1, wherein said fibrous material will disperse in water after no more than about 20 minutes. 26. The water dispersible fibrous fabric of claim 1, wherein said fibrous material will disperse in water after no more than about 10 minutes. 27. The water dispersible fibrous fabric of claim 1, wherein after up to about 60 minutes said fibrous material breaks up into multiple pieces each having an average size of less than about 50% relative to its pre-dispersed size. 28. The water dispersible fibrous fabric of claim 1, wherein after up to about 60 minutes said fibrous material breaks up into multiple pieces each having an average size of less than about 40% relative to its pre-dispersed size. 29. The water dispersible fibrous fabric of claim 1, wherein after up to about 60 minutes said fibrous material breaks up into multiple pieces each having an average size of less than about 30% relative to its pre-dispersed size. 30. The water dispersible fibrous fabric of claim 1, wherein said fabric is used in a disposable personal care product. 31. The water dispersible fibrous fabric of claim 30, wherein said personal care product is selected from a wipe, diaper, training pant, swimwear, absorbent underpant, adult incontinence product, feminine hygiene product, absorbent pad, wound dressing and bandage. 32. A disposable absorbent article comprising a water dispersible fibrous fabric, wherein the fabric comprises:a fibrous substrate, the fibrous substrate comprising less than about 20% fiber fraction of fibers having a length of about 6-10 mm in length; anda water-dispersible binder comprising a first polymer formed from at least four mono mers selected from acrylic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid and alkali earth metal and organic amine salts thereof, butyl acrylate, and 2-ethylhexyl acrylate; and a second polymer comprising a non-crosslinking poly(ethylene-vinyl acetate); wherein the composition is insoluble in a neutral salt solution containing at least about 0.3 weight percent salt, said salt comprising one or more monovalent ions;wherein said fabric is water dispersible in an aqueous environment containing up to about 200 ppm of one or more multivalent ions and a monovalent ion concentration of less than about 0.5% by weight. 33. The disposable absorbent article of claim 32, wherein the fibrous substrate comprises pulp and synthetic fibers. 34. The disposable absorbent article of claim 32, wherein the less than about 20% fiber fraction of fibers having a length of about 6-10 mm in length are synthetic fibers. 35. The disposable absorbent article of claim 32, wherein at least about 80% of the fiber fraction of the fibrous substrate comprises pulp and less than about 20% of the fiber fraction of the fibrous substrate comprises synthetic fibers. 36. The disposable absorbent article of claim 32, wherein about 85-95% of the fiber fraction of the fibrous substrate comprises pulp and about 5-15% of the fiber fraction of the fibrous substrate comprises synthetic fibers. 37. The disposable absorbent article of claim 32, wherein about 3-17% of the fibers of the fibrous substrate have a fiber length of about 6-10 mm. 38. The disposable absorbent article of claim 32, wherein about 5-15% of the fibers of the fibrous substrate have a fiber length of about 6-10 mm. 39. The disposable absorbent article of claim 32, wherein about 15% of the fibers of the fibrous substrate have a length of about 8 mm. 40. The disposable absorbent article of claim 39, wherein the fibers of the fibrous substrate having a length of about 8 mm are synthetic fibers. 41. The disposable absorbent article of claim 32, wherein said binder comprises less than about 20% by weight of said fibrous fabric and said fibrous substrate comprises more than about 80% by weight of said fibrous fabric. 42. The disposable absorbent article of claim 32, wherein said binder comprises about 10-15% by weight of said fibrous fabric and said fibrous substrate comprises more than about 85-90% by weight of said fibrous fabric. 43. The disposable absorbent article of claim 32, wherein the article is a personal care product selected from a wipe, diaper, training pant, swimwear, absorbent underpant, incontinence product, feminine hygiene product, absorbent pad, wound dressing and bandage. 44. The disposable absorbent article of claim 32, wherein the first polymer of the water-dispersible binder comprises from about 35 to less than about 80 mole percent acrylic acid monomeric units; from greater than 0 to about 20 mole percent 2-acrylamido-2-methyl-1-propanesulfonic acid monomeric units and alkali earth metal and organic amine salts thereof; from greater than 0 to about 65 mole percent butyl acrylate monomeric units; and from greater than 0 to about 45 mole percent 2-ethylhexyl acrylate monomeric units. 45. The disposable absorbent article of claim 32, wherein the first polymer of the water-dispersible binder comprises from about 50 to less than about 67 mole percent acrylic acid monomeric units; from greater than 0 to about 10 mole percent 2-acrylamido-2-methyl-1-propanesulfonic acid monomeric units and alkali earth metal and organic amine salts thereof; from about 15 to about 28 mole percent butyl acrylate monomeric units; and from about 7 to about 15 mole percent 2-ethylhexyl acrylate monomeric units. 46. The disposable absorbent article of claim 32, wherein the first polymer of the water-dispersible binder comprises from about 57 to less than about 66 mole percent acrylic acid monomeric units; from about 1 to about 6 mole percent 2-acrylamido-2-methyl-1-propanesulfonic acid monomeric units and alkali ea rth metal or organic amine salts thereof; from about 15 to about 28 mole percent butyl acrylate monomeric units; and from about 7 to about 13 mole percent 2-ethylhexyl acrylate monomeric units. 47. The disposable absorbent article of claim 32, wherein the first polymer of the water-dispersible binder is present in an amount from about 55 to about 95 weight percent. 48. The disposable absorbent article of claim 32, wherein the first polymer of the water-dispersible binder is present in an amount from about 65 to about 85 weight percent. 49. The disposable absorbent article of claim 32, wherein the second polymer of the water-dispersible binder is present in an amount from about 5 to about 45 weight percent. 50. The disposable absorbent article of claim 32, wherein the water-dispersible binder comprises from about 15 to about 35 weight percent non-crosslinking poly(ethylene-vinyl acetate). 51. The disposable absorbent article of claim 32, wherein the first polymer of the water-dispersible binder comprises from about 57 to less than about 66 mole percent acrylic acid monomeric units; from about 1 to about 6 mole percent AMPS or NaAMPS monomeric units; from about 15 to about 28 mole percent butyl acrylate monomeric units; and from about 7 to about 13 mole percent 2-ethylhexyl acrylate monomeric units; and wherein the composition comprises from about 65 to about 80 weight percent of the first polymer and from about 20 to about 35 weight percent of the second polymer. 52. A wet wipe comprising:a fibrous substrate, wherein less than about 20% of the fibers comprising the fibrous substrate have a length of about 6-10 mm; andan ion-sensitive water-dispersible binder comprising a sulfonate anion modified polymer and a non-crosslinking poly(ethylene-vinyl acetate), wherein the composition is insoluble in a neutral salt solution containing at least about 0.3 weight percent salt, said salt comprising one or more monovalent ions;wherein said binder comprises less than about 25% by weight of said fibrous fabric and said fibrous substrate comprising more than about 75% by weight of said fibrous fabric;wherein the fabric is dispersible in an aqueous environment containing up to about 200 ppm of one or more divalent and/or multivalent ions; and wherein after up to about 60 minutes said fibrous material breaks up into multiple pieces each having an average size of less than about 50% relative to its pre-dispersed size. 53. The water dispersible fibrous fabric of claim 1, wherein said binder comprises less than about 25% by weight of said fabric. 54. The water dispersible fibrous fabric of claim 1, wherein said binder comprises from about 5% to about 20% by weight of said fabric. 55. The water dispersible fibrous fabric of claim 1, wherein said binder comprises from about 10% to about 15% by weight of said fabric. 56. The water dispersible fibrous fabric of claim 1, wherein the composition comprises from about 75 weight percent of the sulfonate anion modified polymer and about 25 weight percent of the non-crosslinking poly(ethylene-vinyl acetate).
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