Soft tissue hydrophilic tissue products containing polysiloxane and having unique absorbent properties

• US 20050136265A1
• Filed: 12/19/2003
• Published: 06/23/2005
• Est. Priority Date: 12/19/2003
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Liu, Kou-Chang, Shannon, Thomas Gerard, Fortune, Amber Marie
• Granted Patent: US 7,186,318 B2
• Time in Patent Office: Days
• US Class Current: 428/447
• CPC Class Codes: D21H 17/13 Silicon-containing compounds
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

The present invention is a polysiloxane treated hydrophilic tissue sheet having a polydialkylsiloxane content of about 0.4% or greater by weight of dry pulp fibers. The polysiloxane treated hydrophilic tissue sheet may also have a wet out time after aging 20 days at about 130° F. of about 10 seconds or less.

Claims

1. A polysiloxane treated hydrophilic tissue sheet having a polydialkylsiloxane content of about 0.4% or greater by weight of dry pulp fibers and a wet out time after aging 20 days at about 130°

F. of about 10 seconds or less.

2. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the polydialkylsiloxane content is about 0.6% or greater by weight of dry pulp fibers.

3. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the polydialkylsiloxane content is greater than about 0.8% or greater by weight of dry pulp fibers.

4. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the wet out time after aging 20 days at about 130°

F. is about 8 seconds or less.

5. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the wet out time after aging 20 days at about 130°

F. is about 5 seconds or less.

6. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the polysiloxane is applied uniformly across at least one exterior surface of the tissue sheet.

7. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the polydialkylsiloxane is polydimethylsiloxane.

8. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the tissue sheet is a single ply tissue product.

9. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the tissue sheet is a multi-ply tissue product.

10. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the polysiloxane comprises:

a) at least one hydrophobic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers; and

,

b) at least one hydrophilic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers.

11. The polysiloxane treated hydrophilic tissue sheet of claim 10, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers is from about 1:

4 to about 4;

1.

12. The polysiloxane treated hydrophilic tissue sheet of claim 10, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers is from about 1:

2 to about 2;

1.

13. The polysiloxane treated hydrophilic tissue sheet of claim 10, wherein the hydrophilic polysiloxane has a general structure of:

14. The polysiloxane treated hydrophilic tissue sheet of claim 13, wherein each R⁰-R⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ether, polyether or polyester group, or mixtures thereof.

15. The polysiloxane treated hydrophilic tissue sheet of claim 13, wherein each R⁷ and R⁸ is CH₃.

16. The polysiloxane treated hydrophilic tissue sheet of claim 13, wherein R¹⁰ comprises an amino functional moiety selected from a primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

17. The polysiloxane treated hydrophilic tissue sheet of claim 13, wherein R¹¹ comprises a polyether functional group having the formula:

—

R¹²—

(R¹³O)_a—

(R¹⁴O)_b—

R¹⁵ wherein;

each R¹², R¹³, and R¹⁴ comprises independently branched C_1-4 alkyl groups, linear C_1-4 alkyl groups, or mixtures thereof;

R¹⁵ comprises H, C_1-30 alkyl group, or mixtures thereof; and

,

a and b are integers of from about 1 to about 100.

18. The polysiloxane treated hydrophilic tissue sheet of claim 10, wherein the hydrophobic polysiloxane is a functional polysiloxane having the general structure of:

19. The polysiloxane treated hydrophilic tissue sheet of claim 18, wherein each R¹-R⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ester, substituted amide, or mixture thereof.

20. The polysiloxane treated hydrophilic tissue sheet of claim 18, wherein the R¹⁰ moiety comprises an amino functional moiety.

21. The polysiloxane treated hydrophilic tissue sheet of claim 18, wherein the amino functional moiety is selected from the group of primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

22. The polysiloxane treated hydrophilic tissue sheet of claim 18, wherein the R¹⁰ moiety is —

R²⁰—

NH—

R²¹—

NH₂ where R²⁰ and R²¹ comprise independently a C₂ or higher linear or branched alkyl groups.

23. The polysiloxane treated hydrophilic tissue sheet of claim 1, further comprising about 40% or less by weight of at least one additional polysiloxane wherein the at least one additional polysiloxane does not contain a functional group capable of substantively affixing the polysiloxane to the pulp fibers.

24. The polysiloxane treated hydrophilic tissue sheet of claim 23, wherein the at least one polysiloxane has a viscosity of about 200 centipoise or greater at 25°

C.

25. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the tissue sheet comprises pulp fibers selected from the group consisting essentially of:

softwood kraft pulp fibers;

hardwood kraft pulp fibers;

synthetic fibers;

or, mixture thereof.

26. The polysiloxane treated hydrophilic tissue sheet of claim 1, wherein the tissue sheet further comprises a skin health benefit agent.

27. The polysiloxane treated hydrophilic tissue sheet of claim 26, wherein the skin health benefit agent comprises in whole or part, aloe vera extract, a mineral oil, a petrolatum, a wax, a tocopherol or any combination thereof.

28. The polysiloxane treated hydrophilic tissue sheet of claim 1, further comprising a specialty additive selected from the group consisting essentially of:

odor control agents;

activated carbon fibers or particles;

baby powder;

baking soda;

chelating agents;

zeolites;

perfumes or fragrances;

cyclodextrin compounds;

superabsorbent particles;

synthetic fibers;

cationic dyes;

optical brighteners;

humectants; and

, mixtures thereof.

29. A tissue sheet containing a polysiloxane composition comprising:

a) a hydrophobic polysiloxane having a functional group capable of substantively affixing the hydrophobic polysiloxane to pulp fibers; and

,

b) a hydrophilic polysiloxane having a functional group capable of substantively affixing the hydrophilic polysiloxane to pulp fibers,

wherein the tissue sheet has a polydialkylsiloxane content of about 0.2% or greater by weight of dry fibers.

30. The tissue sheet of claim 29, wherein the tissue sheet has a wet out time of about 10 seconds or less.

31. The tissue sheet of claim 30, wherein the tissue sheet has a silicone retention factor of about 0.6 or greater and a water drop test value after aging at about 85°

C. for one hour of about 40 seconds or less.

32. The tissue sheet of claim 31, wherein the tissue sheet has a polydialkylsiloxane content of about 0.6% or greater by weight.

33. The tissue sheet of claim 31, wherein the tissue sheet has a polydialkylsiloxane content of about 0.8% or greater by weight.

34. The tissue sheet of claim 31, wherein the tissue sheet has a water drop test value after aging at about 85°

C. for one hour of about 30 seconds or less.

35. The tissue sheet of claim 31, wherein the tissue sheet has a water drop test value after aging at about 85°

C. for one hour of about 15 seconds or less.

36. The tissue sheet of claim 31, wherein the tissue sheet has a water drop test value after aging at about 85°

C. for one hour of about 10 seconds or less.

37. The tissue sheet of claim 31, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers is from about 1:

4 to about 4;

1.

38. The tissue sheet of claim 31, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the polysiloxane to pulp fibers is from about 1:

2 to about 2;

1.

39. The tissue sheet of claim 29, wherein the hydrophilic polysiloxane wherein the hydrophilic polysiloxane is has a general structure of:

40. The tissue sheet of claim 39, wherein each R⁰-⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ether, polyether or polyester group, or mixtures thereof.

41. The tissue sheet of claim 39, wherein each R⁷ and R⁸ is CH₃.

42. The tissue sheet of claim 39, wherein R¹⁰ comprises an amino functional moiety selected from a primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

43. The tissue sheet of claim 39, wherein R¹¹ comprises a polyether functional group having the formula:

—

R¹²(R¹³O)_a—

(R¹⁴O)_b—

R¹⁵ wherein;

each R¹², R¹³, and R¹⁴ comprises independently branched C_1-4alkyl groups, linear C_1-4 alkyl groups, or mixtures thereof;

R¹⁵ comprises H, C_1-30 alkyl group, or mixtures thereof; and

,

a and b are integers of from about 1 to about 100.

44. The tissue sheet of claim 29, wherein the hydrophobic polysiloxane is a functional polysiloxane having the general structure of:

45. The tissue sheet of claim 44, wherein each R¹-R⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ester, substituted amide, or mixture thereof.

46. The tissue sheet of claim 44, wherein the R¹⁰ moiety comprises an amino functional moiety.

47. The tissue sheet of claim 44, wherein the amino functional moiety is selected from the group of primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

48. The tissue sheet of claim 44, wherein the R¹⁰ moiety is —

R²⁰—

NH—

R²¹—

NH₂ where R²⁰ and R²¹ are C₂ or higher linear or branched alkyl groups.

49. The tissue sheet of claim 29, further comprising about 40% or less by weight of at least one additional polysiloxane wherein the at least one polysiloxane does not contain a functional group capable of substantively affixing the at least one additional polysiloxane to the pulp fibers.

50. The tissue sheet of claim 49, wherein the at least one additional polysiloxane has a viscosity of about 200 centipoise or greater at 25°

C.

51. The tissue sheet of claim 29, wherein the polysiloxane composition is present in the form of continuous filaments distributed in a random fashion across a surface of the tissue sheet.

52. The tissue sheet of claim 51, wherein the polysiloxane composition is applied as a blend of neat polysilxoxanes.

53. The tissue sheet of claim 51, wherein the tissue sheet has a water drop test value after aging at about 130°

F. for 20 days of about 10 seconds or less.

54. A method of making a polysiloxane treated hydrophilic tissue sheet having a high level of polydialkylsiloxane comprising:

a) blending a polysiloxane composition wherein the polysiloxane composition comprises a hydrophilic polysiloxane having a functional group capable of substantively affixing the hydrophilic polysiloxane to pulp fibers and a hydrophobic polysiloxane having a functional group capable of substantively affixing the hydrophobic polysiloxane to pulp fibers; and

,

b) topically applying the polysiloxane composition to a tissue sheet, wherein the tissue sheet has a consistency of about 10% or greater, thereby providing a polysiloxane treated hydrophilic tissue sheet,

wherein the polysiloxane treated hydrophilic tissue sheet has a polydialkylsioxane content of about 0.2% or greater by weight of dry pulp fibers

55. A method of claim 54, further comprising drying the polysiloxane treated hydrophilic tissue sheet, thereby providing a dry polysiloxane treated hydrophilic tissue sheet having a polydialkylsiloxane content of about 0.2% or greater by weight of dry pulp fibers.

56. The method of claim 54, wherein the polysiloxane composition is applied to the tissue sheet as an emulsion.

57. The method of claim 54, wherein the polysiloxane composition is applied to the tissue sheet as a blend of the neat fluids.

58. The method of claim 54, wherein the polysiloxane treated hydrophilic tissue sheet has a wet out time of about 10 seconds or less.

59. The method of claim 54, wherein the polysiloxane treated hydrophilic tissue sheet has a silicone retention factor of about 0.6 or greater and a water drop test value after aging at about 85°

C. for one hour of about 40 seconds or less.

60. The method of claim 59, wherein the polysiloxane treated hydrophilic tissue sheet has a polydialkylsiloxane content of about 0.4% or greater by weight.

61. The method of claim 59, wherein the polysiloxane treated hydrophilic tissue sheet has a polydialkylsiloxane content of about 0.8% or greater by weight.

62. The method of claim 59, wherein the polysiloxane treated hydrophilic tissue sheet has a water drop test value after aging at about 85°

C. for one hour of about 30 seconds or less.

63. The method of claim 59 wherein the polysiloxane treated hydrophilic tissue sheet has a water drop test value after aging at about 85°

C. for one hour of about 15 seconds or less.

64. The method of claim 59 wherein the polysiloxane treated hydrophilic tissue sheet has a water drop test value after aging at about 85°

C. for one hour of about 10 seconds or less.

65. The method of claim 54, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the hydrophobic polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the hydrophilic polysiloxane to pulp fibers is from about 1:

4 to about 4;

1.

66. The method of claim 54, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the hydrophobic polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the hydrophilic polysiloxane to pulp fibers is from about 1:

2 to about 2;

1.

67. The method of claim 54, wherein the hydrophilic polysiloxane has a general structure of:

68. The method of claim 67, wherein each R⁰-R⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ether, polyether or polyester group, or mixtures thereof.

69. The method of claim 67, wherein each R⁷ and R⁸ is CH₃.

70. The method of claim 67, wherein R¹⁰ comprises an amino functional moiety selected from a primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

71. The method of claim 67, wherein R¹¹ comprises a polyether functional group having the formula:

—

R¹²(R¹³—

O)_a—

(R¹⁴O)_b—

R¹⁵

wherein;

each R¹², R¹³, and R¹⁴ comprises independently branched C_1-4alkyl groups, linear C_1-4 alkyl groups, or mixtures thereof;

R¹⁵ comprises H, C_1-30 alkyl group, or mixtures thereof; and

,

a and b are integers of from about 1 to about 100.

72. The method of claim 54, wherein the hydrophobic polysiloxane is a functional polysiloxane having the general structure of:

73. The method of claim 72, wherein each R¹-R⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ester, substituted amide, or mixture thereof.

74. The method of claim 72, wherein the R¹⁰ moiety comprises an amino functional moiety.

75. The method of claim 72, wherein the amino functional moiety is selected from the group of primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

76. The method of claim 72, wherein the R¹⁰ moiety is —

R²⁰—

NH—

R²¹—

NH₂ where R²⁰ and R²¹ are C₂ or higher linear or branched alkyl groups.

77. The method of claim 54, wherein the polysiloxanes have a viscosity of about 200 centipoise or greater at 25°

C.

78. A tissue softening composition comprising:

a) a hydrophobic polysiloxane having a functional group capable of substantively affixing the hydrophobic polysiloxane to pulp fibers; and

,

b) a hydrophilic polysiloxane having a functional group capable of substantively affixing the hydrophilic polysiloxane to pulp fibers.

79. The tissue softening composition of claim 78, further comprising at least one surfactant, at least one wetting agent, or mixtures thereof.

80. The tissue softening composition of claim 78, further comprising a diluent.

81. The tissue softening composition of claim 80, wherein the diluent is water.

82. The tissue softening composition of claim 78, wherein a tissue sheet comprising pulp fiber is treated with the tissue softening composition at a concentration of 1 part by weight total polysiloxane to 99 parts by weight dry pulp fiber and has a retention factor of about 0.6 or greater and a water drop test value after aging at about 85°

C. for one hour of about 130 seconds or less.

83. The tissue softening composition of claim 82, wherein the tissue sheet treated with the tissue softening composition has a polydialkylsiloxane content of about 0.4% or greater by weight.

84. The tissue softening composition of claim 82, wherein the tissue sheet treated with the tissue softening composition has a polydialkylsiloxane content of about 0.6% or greater by weight.

85. The tissue softening composition of claim 82, wherein the tissue sheet treated with the tissue softening composition has a water drop test value after aging at about 85°

C. for one hour of about 60 seconds or less.

86. The tissue softening composition of claim 82, wherein the tissue sheet treated with the tissue softening composition has a water drop test value after aging at about 85°

C. for one hour of about 30 seconds or less.

87. The tissue softening composition of claim 82, wherein the handsheet has a water drop test value after aging at about 85°

C. for one hour of about 10 seconds or less.

88. The tissue softening composition of claim 78, further comprising a skin health benefit agent.

89. The tissue softening composition of claim 88, wherein the skin health benefit agent comprises an aloe vera extract, a mineral oil, a petrolatum, a wax, a tocopherol or a mixture thereof.

90. The tissue softening composition of claim 78, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the hydrophobic polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the hydrophilic polysiloxane to pulp fibers is from about 1:

4 to about 4;

1.

91. The tissue softening composition of claim 78, wherein the weight ratio of hydrophobic polysiloxane having a functional group capable of substantively affixing the hydrophobic polysiloxane to pulp fibers to hydrophilic polysiloxane having a functional group capable of substantively affixing the hydrophilic polysiloxane to pulp fibers is from about 1:

2 to about 2;

1.

92. The tissue softening composition of claim 78, wherein the hydrophilic polysiloxane has a general structure of:

93. The tissue softening composition of claim 92, wherein each R⁰-R⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ether, polyether or polyester group, or mixtures thereof.

94. The tissue softening composition of claim 92, wherein each R⁷ and R⁸ is CH₃.

95. The tissue softening composition of claim 92, wherein R¹⁰ comprises an amino functional moiety selected from a primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

96. The tissue softening composition of claim 92, wherein R¹¹ comprises a polyether functional group having the formula:

—

R¹²(R¹³O)_a—

(R¹⁴O)_b—

R¹⁵

wherein;

each R¹², R¹³, and R¹⁴ comprises independently branched C_1-4alkyl groups, linear C_1-4 alkyl groups, or mixtures thereof;

R¹⁵ comprises H, C_1-30alkyl group, or mixtures thereof; and

,

a and b are integers of from about 1 to about 100.

97. The tissue softening composition of claim 78, wherein the hydrophobic polysiloxane is a functional polysiloxane having the general structure of:

98. The tissue softening composition of claim 97, wherein each R¹-R⁹ moiety comprises independently a C₁ or higher alkyl group, aryl group, ester, substituted amide, or mixture thereof.

99. The tissue softening composition of claim 97, wherein the R¹⁰ moiety comprises an amino functional moiety

100. The tissue softening composition of claim 97, wherein the amino functional moiety is selected from the group of primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.

101. The tissue softening composition of claim 97, wherein the R¹⁰ moiety is —

R²⁰—

NH—

R²¹—

NH₂ where R²⁰ and R²¹ are C₂ or higher linear or branched alkyl groups.

102. The tissue softening composition of claim 78, further comprising about 40% or less by weight of at least one additional polysiloxane wherein the at least one additional polysiloxane does not contain a functional group capable of substantively affixing the at least one additional polysiloxane to the pulp fibers.

103. The tissue softening composition of claim 102, wherein the at least one additional polysiloxane has a viscosity of about 200 centipoise or greater at 25°

C.