U.S. patent application number 10/003145 was filed with the patent office on 2003-07-10 for soft absorbent tissue containing hydrophilically-modified amino-functional polysiloxanes.
Invention is credited to Liu, Kou-Chang.
Application Number | 20030127208 10/003145 |
Document ID | / |
Family ID | 21704393 |
Filed Date | 2003-07-10 |
United States Patent
Application |
20030127208 |
Kind Code |
A1 |
Liu, Kou-Chang |
July 10, 2003 |
Soft absorbent tissue containing hydrophilically-modified
amino-functional polysiloxanes
Abstract
A tissue product having improved hand feel and good wettability
is produced by printing onto one or both sides of the tissue an
aqueous emulsion containing a hydrophilically-modified
amino-functional polydimethylsiloxane. The hydrophilically-modified
amino-functional polydimethylsiloxane structure has one or more
pendant groups containing ethylene oxide moieties.
Inventors: |
Liu, Kou-Chang; (Appleton,
WI) |
Correspondence
Address: |
KIMBERLY-CLARK WORLDWIDE, INC.
401 NORTH LAKE STREET
NEENAH
WI
54956
|
Family ID: |
21704393 |
Appl. No.: |
10/003145 |
Filed: |
November 15, 2001 |
Current U.S.
Class: |
162/164.4 ;
162/158 |
Current CPC
Class: |
D21H 17/59 20130101;
D21H 19/32 20130101 |
Class at
Publication: |
162/164.4 ;
162/158 |
International
Class: |
D21H 017/59 |
Claims
We claim:
1. A tissue containing a polysiloxane having the following general
structure: 6wherein R.sub.1 is a C.sub.1 to C.sub.8 straight chain,
branched, cyclic alkyl radical; R.sub.2, R.sub.3, and R.sub.4 are
independently a C.sub.2 to C.sub.10 straight chain, branched,
cyclic, unsubstituted or substituted alkylene diradical; m=0 to
10,000; n=20 to 100,000; r=1 to 10,000; s=0 to 10,000; t=0 or 1;
"A" is a NR.sub.5R.sub.6, a (NR.sub.7R.sub.8R.sub.9).sup.+X.sup.-,
a OCOR.sub.8R.sub.9; a O--SO.sub.3R.sub.1; a
PO.sub.3R.sub.11R.sub.12, or a COOR.sub.14 radical; when m=0,
R.sub.5 and R.sub.6 are independently a radical of COR.sub.15,
COOR.sub.15, CONR.sub.15R.sub.17, COR.sub.16--COR.sub.17; or
--R.sub.18--COOR.sub.17; when m>0, R.sub.5 and R.sub.6 are
independently a radical of hydrogen, C.sub.1 to C.sub.8alkyl,
COR.sub.15, COOR.sub.15, CONR.sub.15R.sub.17,
COR.sub.16--COR.sub.17 or --R.sub.18--COOR.sub.17; R.sub.7, and
R.sub.8 are independently a C.sub.1 to C.sub.6alkyl radical;
R.sub.9 is a C.sub.1 to C.sub.30 straight chain, branched,
substituted or unsubstituted alkyl radical, or a SO.sub.2PhR.sub.10
where Ph is a phenyl group; R.sub.10 is a C.sub.1 to C.sub.30
straight chain, branched, substituted or unsubstituted alkyl
radical; "X" is a halide, a sulfate or other counter ion; R.sub.11
and R.sub.12, are independently a C.sub.1 to C.sub.6alkyl radical;
R.sub.14 is a hydrogen, a C.sub.1 to C.sub.30 straight chain,
branched, substituted or unsubstituted alkyl radical; R.sub.15 and
R.sub.17 are independently a C.sub.1 to C.sub.30 straight chain,
branched, substituted or unsubstituted alkyl radical; R.sub.16,
R.sub.18 are independently a C.sub.1 to C.sub.8ethylene diradical;
and "B" is a hydrogen, an amino acid or an aminoacid derivative, a
C.sub.1 to C.sub.6 straight chain, branched, cyclic alkyl radical
or independently a radical of "A".
2. The tissue of claim 1 wherein the Wet Out Time is about 10
seconds or less.
3. The tissue of claim 1 wherein the Wet Out Time is about 7
seconds or less.
4. The tissue of claim 1 wherein the Wet Out Time is about 5
seconds or less.
5. The tissue of claim 1 wherein the Wet Out Time is from about 4
to about 8 seconds.
6. The tissue of claim 1 having from about 0.5 to about 15 dry
weight percent of the derivitized amino-functional
polysiloxane.
7. The tissue of claim 1 having from about 1 to about 10 dry weight
percent of the derivitized amino-functional polysiloxane.
8. The tissue of claim 1 having from about 1 to about 5 dry weight
percent of the derivitized amino-functional polysiloxane.
9. The tissue of claim 1 having from about 2 to about 5 dry weight
percent of the derivitized amino-functional polysiloxane.
10. The tissue of claim 1 wherein the ratio of the Differential Wet
Out Time to the add-on amount of the derivitized amino-functional
polysiloxane is about 3 seconds per weight percent or less.
11. The tissue of claim 1 wherein the ratio of the Differential Wet
Out Time to the add-on amount of the derivitized amino-functional
polysiloxane is about 1 second per weight percent or less.
12. The tissue of claim 1 wherein the ratio of the Differential Wet
Out Time to the add-on amount of the derivitized amino-functional
polysiloxane is about 0.5 second per weight percent or less.
13. The tissue of claim 1 wherein the tissue is an uncreped
throughdried tissue.
14. The tissue of claim 1 wherein both sides of the tissue are
printed with the same derivitized amino-functional
polysiloxane.
15. The tissue of claim 1 wherein the derivitized amino-functional
polysiloxane printed on one side of the tissue is different than
the derivitized amino-functional polysiloxane printed on the other
side of the tissue.
16. The tissue of claim 1 wherein A is a NR.sub.5R.sub.6
radical.
17. The tissue of claim 1 wherein A is a
N(R.sub.7R.sub.8R.sub.9).sup.+/- radical.
18. The tissue of claim 1 wherein A is a OCOR.sub.8R.sub.9
radical.
19. The tissue of claim 1 wherein R.sub.5 and R.sub.6 are
independently a hydrogen radical.
20. The tissue of claim 1 wherein R.sub.5 and R.sub.6 are a
C.sub.1-C.sub.8 radical.
21. The tissue of claim 1 wherein R.sub.5 and R.sub.6 are a
COR.sub.15 radical.
22. The tissue of claim 1 wherein R.sub.5 and R.sub.6 are a
COOR.sub.15 radical.
23. The tissue of claim 1 wherein R.sub.5 and R.sub.6 are a
CONR.sub.15R.sub.17 radical.
24. The tissue of claim 1 wherein R.sub.5 and R.sub.6 are a
COR.sub.16--COR.sub.17 radical.
25. The tissue of claim 1 wherein R.sub.5 and R.sub.6 are a
R.sub.18--COOR.sub.17 radical.
26. The tissue of claim 1 wherein B=A.
27. The tissue of claim 1 wherein the polysiloxane has the
following structure: 7
28. The tissue of claim 1 wherein the polysiloxane has the
following structure: 8
29. The tissue of claim 1 wherein the polysiloxane has the
following structure: 9
30. The tissue of claim 1 wherein the polysiloxane has the
following structure: 10
31. The tissue of claim 1 wherein the polysiloxane has the
following structure: 11
32. The tissue of claim 1 wherein the polysiloxane has the
following structure: 12
33. The tissue of claim 1 wherein the polysiloxane has the
following structure: 13
34. The tissue of claim 1 wherein the polysiloxane has the
following structure: 14
35. The tissue of claim 1 wherein the polysiloxane has the
following structure: 15
36. The tissue of claim 1 wherein the polysiloxane has the
following structure: 16
37. The tissue of claim 1 wherein the polysiloxane has the
following structure: 17
38. The tissue of claim 1 wherein the polysiloxane has the
following structure: 18
39. The tissue of claim 1 wherein the polysiloxane has the
following structure: 19
40. The tissue of claim 1 wherein the polysiloxane has the
following structure: 20
41. The tissue of claim 1 wherein the polysiloxane has the
following structure: 21
42. The tissue of claim 1 wherein the polysiloxane has the
following structure: 22
43. The tissue of claim 1 wherein the polysiloxane has the
following structure: 23
44. The tissue of claim 1 wherein the polysiloxane has the
following structure: 24
45. The tissue of claim 1 wherein the polysiloxane has the
following structure: 25
Description
BACKGROUND OF THE INVENTION
[0001] In the field of soft tissues, such as facial tissue and bath
tissue, it is well known that the application of polysiloxanes to
the surface of the tissue can impart an improved surface feel to
the tissue. However, polysiloxanes are also known to impart
hydrophobicity to the treated tissue. Hence, it is difficult to
find a proper balance between softness and wettability, both of
which are desirable attributes for tissue, particularly bath
tissue.
SUMMARY OF THE INVENTION
[0002] It has now been discovered that the wettability of a tissue
can be improved with minimal negative impact on the surface feel of
the tissue by treating one or both outer surfaces of the tissue
with a particular group of hydrophilically-modified
amino-functional polysiloxanes. More specifically, suitable
polysiloxane structures have one or more pendant groups and/or one
or both terminal groups which contain an amine derivative. The
general structure of the hydrophilically-modified amino-functional
polysiloxanes of this invention is as follows: 1
[0003] wherein
[0004] R.sub.1 is a C.sub.1 to C.sub.8 straight chain, branched,
cyclic alkyl radical;
[0005] R.sub.2, R.sub.3, and R.sub.4 are independently a C.sub.2 to
C.sub.10 straight chain, branched, cyclic, unsubstituted or
substituted alkylene diradical;
[0006] m=0 to 10,000;
[0007] n=20 to 100,000;
[0008] r=1 to 10,000;
[0009] s=0 to 10,000;
[0010] t=0 or 1;
[0011] "A" is a NR.sub.5R.sub.6, a
(NR.sub.7R.sub.8R.sub.9).sup.+X.sup.-, a OCOR.sub.8R.sub.9; a
O--SO.sub.3R.sub.1; a PO.sub.3R.sub.11R.sub.12, or a COOR.sub.14
radical;
[0012] when m=0, R.sub.5 and R.sub.6 are independently a radical of
COR.sub.15, COOR.sub.15, CONR.sub.15R.sub.17,
COR.sub.16--COR.sub.17; or --R.sub.1--COOR.sub.17;
[0013] when m>0, R.sub.5 and R.sub.6 are independently a radical
of hydrogen, C.sub.1 to C.sub.8alkyl, COR.sub.15, COOR.sub.15,
CONR.sub.15 R.sub.17, COR.sub.16--COR.sub.17 or
--R.sub.18--COOR.sub.17;
[0014] R.sub.7, and R.sub.8 are independently a C.sub.1 to
C.sub.6alkyl radical;
[0015] R.sub.9 is a C.sub.1 to C.sub.30 straight chain, branched,
substituted or unsubstituted alkyl radical, or a SO.sub.2PhR.sub.10
where Ph is a phenyl group;
[0016] R.sub.10 is a C.sub.1 to C.sub.30 straight chain, branched,
substituted or unsubstituted alkyl radical;
[0017] "X" is a halide, a sulfate or other counter ion;
[0018] R.sub.11, and R.sub.12, are independently a C.sub.1 to
C.sub.6alkyl radical;
[0019] R.sub.14 is a hydrogen, a C.sub.1 to C.sub.30 straight
chain, branched, substituted or unsubstituted alkyl radical;
[0020] R.sub.15 and R.sub.17 are independently a C.sub.1 to
C.sub.30 straight chain, branched, substituted or unsubstituted
alkyl radical;
[0021] R.sub.16, R.sub.18 are independently a C.sub.1 to
C.sub.8ethylene diradical; and
[0022] "B" is a hydrogen, an amino acid or an aminoacid derivative,
a C.sub.1 to C.sub.6 straight chain, branched, cyclic alkyl radical
or independently a radical of "A".
[0023] Representative species within the foregoing general
structure include the following: 2345
[0024] The derivitized amino-functional polydimethylsiloxanes
described above can be applied to the tissue web alone or in
conjunction with other chemicals, such as bonders or debonders.
They can be applied to the tissue web, particularly an uncreped
throughdried web, by spraying or printing. Rotogravure printing of
an aqueous emulsion is particularly effective. Add-on amounts can
be from about 0.5 to about 15 dry weight percent, based on the
weight of the tissue, more specifically from about 1 to about 10
dry weight percent, still more specifically from about 1 to about 5
weight percent, still more specifically from about 2 to about 5
weight percent. The distribution of the deposits of the derivitized
amino-functional polydimethylsiloxanes is substantially uniform
over the printed surface of the tissue, even though the surface of
the tissue, such as in the case of uncreped throughdried tissues,
may be highly textured and three-dimensional.
[0025] The Wet Out Time (hereinafter defined) for tissues of this
invention can be about 15 seconds or less, more specifically about
10 seconds or less, still more specifically about 6 seconds or
less, still more specifically about 5 seconds or less, still more
specifically from about 4 to about 8 seconds. As used herein, "Wet
Out Time" is related to absorbency and is the time it takes for a
given sample to completely wet out when placed in water. More
specifically, the Wet Out Time is determined by cutting 20 sheets
of the tissue sample into 2.5 inch squares. The number of sheets
used in the test is independent of the number of plies per sheet of
product. The 20 square sheets are stacked together and stapled at
each corner to form a pad. The pad is held close to the surface of
a constant temperature distilled water bath (23+/-20.degree. C.),
which is the appropriate size and depth to ensure the saturated
specimen does not contact the bottom of the container and the top
surface of the water at the same time, and dropped flat onto the
water surface, staple points down. The time taken for the pad to
become completely saturated, measured in seconds, is the Wet Out
Time for the sample and represents the absorbent rate of the
tissue. Increases in the Wet Out Time represent a decrease in
absorbent rate.
[0026] The "Differential Wet Out Time" is the difference between
the Wet Out Times of a tissue sample treated with a derivitized
amino-functional polydimethylsiloxane and a control tissue sample
which has not been treated. The Differential Wet Out Time, for
purposes of this invention, can be about 10 seconds or less, more
specifically about 5 seconds or less, still more specifically about
3 seconds or less, still more specifically about 2 seconds or less,
and still more specifically about 1 second or less.
[0027] The ratio of the Differential Wet Out Time to the add-on
amount of the derivitized amino-functional polydimethylsiloxane can
be about 3 seconds per weight percent or less, more specifically
about 1 second per weight percent or less, still more specifically
about 0.5 second per weight percent or less.
[0028] Tissue sheets useful for purposes of this invention can be
creped or uncreped. Such tissue sheets can be used for facial
tissues, bath tissues or towels. They can have one, two, three or
more plies. The basis weight of the tissue product can be from
about 25 to about 50 grams per square meter. If used for bath
tissue, a single ply tissue having a basis weight of from about
30-40 grams per square meter is particularly suitable.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] FIG. 1 is a schematic diagram of an uncreped throughdried
process for making bath tissue in accordance with this
invention.
[0030] FIG. 2 is a schematic diagram of the post-manufacturing
method of handling the uncreped throughdried web and the
rotogravure coating process used to apply the derivitized
amino-functional polydimethylsiloxane emulsion in accordance with
this invention.
DETAILED DESCRIPTION OF THE DRAWINGS
[0031] Referring to FIG. 1, shown is a schematic flow diagram of a
throughdrying process for making uncreped throughdried tissue
sheets. Shown is the headbox 1 which deposits an aqueous suspension
of papermaking fibers onto an inner forming fabric 3 as it
traverses the forming roll 4. Outer forming fabric 5 serves to
contain the web while it passes over the forming roll and sheds
some of the water. The wet web 6 is then transferred from the inner
forming fabric to a wet end transfer fabric 8 with the aid of a
vacuum transfer shoe 9. This transfer is preferably carried out
with the transfer fabric traveling at a slower speed than the
forming fabric (rush transfer) to impart stretch into the final
tissue sheet. The wet web is then transferred to the throughdrying
fabric 11 with the assistance of a vacuum transfer roll 12. The
throughdrying fabric carries the web over the throughdryer 13,
which blows hot air through the web to dry it while preserving
bulk. There can be more than one throughdryer in series (not
shown), depending on the speed and the dryer capacity. The dried
tissue sheet 15 is then transferred to a first dry end transfer
fabric 16 with the aid of vacuum transfer roll 17. The tissue sheet
shortly after transfer is sandwiched between the first dry end
transfer fabric and the transfer belt 18 to positively control the
sheet path. The air permeability of the transfer belt is lower than
that of the first dry end transfer fabric, causing the sheet to
naturally adhere to the transfer belt. At the point of separation,
the sheet follows the transfer belt due to vacuum action. Suitable
low air permeability fabrics for use as transfer belts include,
without limitation, COFPA Mononap NP 50 dryer felt (air
permeability of about 50 cubic feet per minute per square foot) and
Asten 960C (impermeable to air). The transfer belt passes over two
winding drums 21 and 22 before returning to pick up the dried
tissue sheet again. The sheet is transferred to the parent roll 25
at a point between the two winding drums. The parent roll is wound
onto a reel spool 26, which is driven by a center drive motor.
[0032] Particularly suitable methods of producing uncreped
throughdried basesheets for purposes of this invention are
described in U.S. Pat. No. 6,017,417 issued Jan. 25, 2000 to Wendt
et al. and U.S. Pat. No. 5,944,273 issued Aug. 31, 1999 to Lin et
al., both of which are herein incorporated by reference.
[0033] FIG. 2 illustrates a suitable method for applying the
derivitized amino-functional polydimethylsiloxane to the tissue
basesheet. Shown is the parent roll 25 being unwound and passed
through two calender nips between calender rolls 30a and 31a and
30b and 31b. The calendered web is then passed to the rotogravure
coating station comprising a first closed doctor chamber 33
containing the hydrophilically-modified amino-functional
polydimethylsiloxane emulsion to be applied to a first side of the
web, a first engraved steel gravure roll 34, a first rubber backing
roll 35, a second rubber backing roll 36, a second engraved steel
gravure roll 37 and a second closed doctor chamber 38 containing
the derivitized amino-functional polydimethylsiloxane emulsion to
be applied to the second side of the web. If both sides of the web
are to be treated, the two emulsions can be the same or different.
The calendered web passes through a fixed-gap nip between the two
rubber backing rolls where the derivitized amino-functional
polydimethylsiloxane emulsion is applied to the web. The treated
web is then passed to the rewinder where the web is wound onto logs
40 and slit into rolls of bath tissue.
EXAMPLES
Example 1
[0034] In order to further illustrate this invention, an uncreped
throughdried tissue is produced using the methods described in
FIGS. 1 and 2 and is treated with a hydrophilically-modified
amino-functional polydimethylsiloxane as set forth in structure 12
described above.
[0035] More specifically, a single-ply, three-layered uncreped
throughdried bath tissue is made using eucalyptus fibers for the
outer layers and softwood fibers for the inner layer. Prior to
pulping, a quaternary ammonium softening agent (C-6027 from
Goldschmidt Corp.) is added at a dosage of 4.1 kg/Mton of active
chemical per metric ton of fiber to the eucalyptus furnish. After
allowing 20 minutes of mixing time, the slurry is dewatered using a
belt press to approximately 32% consistency. The filtrate from the
dewatering process is either sewered or used as pulper make-up
water for subsequent fiber batches but not sent forward in the
stock preparation or tissue making process. The thickened pulp
containing the debonder is subsequently re-dispersed in water and
used as the outer layer furnishes in the tissue-making process.
[0036] The softwood fibers are pulped for 30 minutes at 4 percent
consistency and diluted to 3.2 percent consistency after pulping,
while the debonded eucalyptus fibers are diluted to 2 percent
consistency. The overall layered sheet weight is split 30%/40%/30%
among the eucalyptus/refined softwood/ eucalyptus layers. The
center layer is refined to levels required to achieve target
strength values, while the outer layers provide the surface
softness and bulk. Parez 631NC is added to the center layer at 2-4
kilograms per ton of pulp based on the center layer.
[0037] A three-layer headbox is used to form the wet web with the
refined northern softwood Kraft stock in the two center layers of
the headbox to produce a single center layer for the three-layered
product described. Turbulence-generating inserts recess about 3
inches (75 millimeters) from the slice and layer dividers extending
about 1 inch (25.4 millimeters) beyond the slice are employed. The
net slice opening is about 0.9 inch (23 millimeters) and water
flows in all four headbox layers are comparable. The consistency of
the stock fed to the headbox is about 0.09 weight percent.
[0038] The resulting three-layered sheet is formed on a twin-wire,
suction form roll, former with forming fabrics (12 and 13 in FIG.
1) being Lindsay 2164 and Asten 867a fabrics, respectively. The
speed of the forming fabrics is 11.9 meters per second. The
newly-formed web is then dewatered to a consistency of about 20-27
percent using vacuum suction from below the forming fabric before
being transferred to the transfer fabric, which is travelling at
9.1 meters per second (30% rush transfer). The transfer fabric is
an Appleton Wire T807-1. A vacuum shoe pulling about 6-15 inches
(150-380 millimeters) of mercury vacuum is used to transfer the web
to the transfer fabric.
[0039] The web is then transferred to a throughdrying fabric
(Lindsay Wire T1205-1) previously described in connection with FIG.
2 and as illustrated in FIG. 9). The throughdrying fabric is
travelling at a speed of about 9.1 meters per second. The web is
carried over a Honeycomb throughdryer operating at a temperature of
about 350.degree. F. (175.degree. C.) and dried to final dryness of
about 94-98 percent consistency. The resulting uncreped tissue
sheet is then wound into a parent roll.
[0040] The parent roll is then unwound and the web is calendered
twice. At the first station the web is calendered between a steel
roll and a rubber covered roll having a 4 P&J hardness. The
calender loading is about 90 pounds per lineal inch (pli). At the
second calendering station, the web is calendered between a steel
roll and a rubber covered roll having a 40 P&J hardness. The
calender loading is about 140 pli. The thickness of the rubber
covers is about 0.725 inch (1.84 centimeters).
[0041] The calendered single-ply web is then fed into the
rubber-rubber nip of the rotogravure coater to apply the
hydrophilically-modified amino-functional polydimethylsiloxane
emulsion to both sides of the web. The aqueous emulsion contains
40% of a derivitized amino polydimethylsiloxane, 8% surfactant,
0.5% antifoaming agent, 0.5% preservative, and the balance water.
The gravure rolls are electronically engraved, chrome over copper
rolls supplied by Specialty Systems, Inc., Louisville, Ky. The
rolls have a line screen of 200 cells per lineal inch and a volume
of 6.0 Billion Cubic Microns (BCM) per square inch of roll surface.
Typical cell dimensions for this roll are 140 microns in width and
33 microns in depth using a 130-degree engraving stylus. The rubber
backing offset applicator rolls are a 75 Shore A durometer cast
polyurethane supplied by American Roller Company, Union Grove, Wis.
The process is set up to a condition having 0.375 inch interference
between the gravure rolls and the rubber backing rolls and 0.003
inch clearance between the facing rubber backing rolls. The
simultaneous offset/offset gravure printer is run at a speed of
2000 feet per minute using gravure roll speed adjustment
(diferential) to meter the polysiloxane emulsion to obtain the
desired addition rate. The gravure roll speed differential used for
this example is 1000 feet per minute. This process yields an add-on
level of 2.5 weight percent total add-on based on the weight of the
tissue. The tissue is then converted into bath tissue rolls. Sheets
from the bath tissue rolls have a silky, lotiony hand feel and a
Wet Out Time of 4.8 seconds. (Similarly made tissues without the
treatment of this invention have a Wet Out Time of about 4.0
seconds.) The ratio of the Differential Wet Out Time to the weight
percent add-on amount is 0.32.
Example 2
[0042] An uncreped throughdried tissue is made substantially as
described above with the following exceptions: (1) the overall
layered weight is split 20%160%/20% among the eucalyptus/refined
softwood/eucalyptus layers; (2) no Parez is added to the center
layer; (3) the add-on level of the hydrophilically-modified
amino-functional polydimethylsiloxane is 3.0 weight percent; (4)
the structure of the hydrophilically-modified amino-functional
polydimethylsiloxane is as set forth in structure 9 above; and (5)
the hydrophilically-modified amino-functional polydimethylsiloxane
constitutes 40 weight percent of the aqueous emulsion used to
deliver the hydrophilically-modified amino-functional
polydimethylsiloxane to the tissue. The resulting bath tissue
product obtained has a silky, lotiony hand feel and a Wet Out Time
of 5 seconds.
Example 3
[0043] An uncreped throughdried tissue is produced similarly as
described in Example 1 with the following exceptions: (1) prior to
pulping, a polysiloxane of structure 2 is added to the eucalyptus
fibers at a dosage of 2 kg/Mton of active chemical per metric ton
of fiber; (2) the add-on level of the hydrophilically-modified
amino-functional polydimethylsiloxane is 1.5 weight percent; (3)
the structure of the hydrophilically-modified amino-functional
polydimethylsiloxane printed onto the tissue is as set forth in
structure 13 above; and (4) the hydrophilically-modified
amino-functional polydimethylsiloxane constitutes 20 weight percent
of the aqueous emulsion used to deliver the
hydrophilically-modified amino-functional polydimethylsiloxane to
the tissue. The resulting bath tissue product obtained has a silky,
lotiony hand feel and a Wet Out Time of 4.2 seconds.
[0044] It will be appreciated that the foregoing description and
examples are not to be construed as limiting the scope of this
invention, which is defined by the following claims and all
equivalents thereto.
* * * * *