Hydrophilic fibers containing substantive polysiloxanes and tissue products made therefrom
First Claim
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1. Polysiloxane pretreated pulp fibers comprising:
- a) pulp fibers; and
,b) a hydrophobic polysiloxane; and
c) a hydrophilic polysiloxane;
wherein the polysiloxane pretreated pulp fibers have a polydialkylsiloxane content of about 0.4 percent by weight of dry fibers or greater, a silicone retention factor of about 0.6 or greater and an initial water drop absorption value of about 180 second or less.
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Abstract
The present invention is polysiloxane pretreated pulp fibers comprising pulp fibers, and a polysiloxane. The polysiloxane pretreated pulp fibers have a polysiloxane content of about 0.4 percent or greater by weight of dry pulp fibers, a silicone retention factor of about 0.6 or greater, and an initial water drop absorption value of about 180 seconds or less.
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Citations
31 Claims
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1. Polysiloxane pretreated pulp fibers comprising:
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a) pulp fibers; and
,b) a hydrophobic polysiloxane; and c) a hydrophilic polysiloxane; wherein the polysiloxane pretreated pulp fibers have a polydialkylsiloxane content of about 0.4 percent by weight of dry fibers or greater, a silicone retention factor of about 0.6 or greater and an initial water drop absorption value of about 180 second or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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9. The polysiloxane pretreated pulp fibers of claim 8, wherein each R1–
- R9 moiety comprises independently a C1 or higher alkyl group, aryl group, ester, substituted amide, or mixture thereof.
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10. The polysiloxane pretreated pulp fibers of claim 8, wherein the R10 moiety comprises en amino functional moiety.
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11. The polysiloxane pretreated pulp fibers of claim 10, wherein the amino functional moiety is selected from a primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.
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12. The polysiloxane pretreated pulp fibers of claim 10, wherein the R10 moiety is —
- R20—
NH—
R21—
NH2 where R20 and R21 are C2 or higher linear or branched alkyl groups.
- R20—
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13. The polysiloxane pretreated pulp fibers of claim 1, wherein the hydrophilic polysiloxane is has a general structure of:
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14. The polysiloxane pretreated pulp fibers 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.
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15. The polysiloxane pretreated pulp fibers of claim 13, wherein each R7 and R8 is CH3.
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16. The polysiloxane pretreated pulp fibers 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.
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17. The polysiloxane pretreated pulp fibers of claim 13, wherein R11 comprises a polyether functional group having the formula:
- —
R12—
(R13—
O)a—
(R14O)b—
R15wherein; each R12, R13, and R14 comprises independently branched C1-4 alkyl groups, linear C1-4 alkyl groups, or mixtures thereof; R15 comprises H, C1-30 alkyl group, or mixtures thereof; and
,a and b are integers of from about 1 to about 100.
- —
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18. The polysiloxane pretreated pulp fibers of claim 1, wherein each polysiloxane has a viscosity at 25°
- C. of about 25 centipoise or greater.
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19. The polysiloxane pretreated pulp fibers of claim 1, wherein each polysiloxane has a viscosity at 25°
- C. of about 200 centipoise or greater.
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20. The polysiloxane pretreated pulp fibers of claim 1, wherein the pulp fibers are selected from the group consisting essentially of:
- softwood kraft pulp fibers;
hardwood kraft pulp fibers;
synthetic cellulosic fibers;
or, mixture thereof.
- softwood kraft pulp fibers;
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21. The polysiloxane pretreated pulp fibers of claim 1, wherein the pulp fibers comprise hardwood kraft pulp fibers.
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22. The polysiloxane pretreated pulp fibers of claim 1, wherein the polysiloxane pretreated pulp fibers have a water drop test value of about 180 seconds or less after aging at 85°
- C. for 24 hours.
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23. The polysiloxane pretreated pulp fibers of claim 1, wherein the polysiloxane pretreated pulp fibers have a water drop test value of about 30 seconds or less after aging at 85°
- C. or 24 hours.
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24. The polysiloxane pretreated pulp fibers of claim 1, wherein the polysiloxane pretreated pulp fibers have a nit count of about 10 or less.
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25. The polysiloxane pretreated pulp fibers of claim 1, wherein the polysiloxane pretreated pulp fibers have a nit count of about 2 or less.
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26. A single or multi-ply tissue product containing the polysiloxane pretreated pulp fibers of claim 1.
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27. A wiping product containing the polysiloxane pretreated pulp fibers of claim 1.
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28. The single or multi-ply tissue product of claim 26, wherein the tissue product containing the polysiloxane pretreated pulp fibers comprises blended sheets.
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29. The single or multi-ply tissue product of claim 26, wherein the tissue product containing the polysiloxane pretreated pulp fibers comprises layered tissue sheets.
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30. The single or multi-ply tissue product of claim 26, wherein the tissue product is a facial tissue, a bath tissue, or a towel product.
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31. The single or multi-ply tissue product of claim 26, wherein the tissue product has a polydialkylsiloxane content of about 0.15% by weight of dry pulp fibers or greater.
Specification