AU609538B2

AU609538B2 - Chemically treated paper products

Info

Publication number: AU609538B2
Application number: AU25026/88A
Authority: AU
Inventors: Larry Bogart; James J. Hiplins; Morris L. Smith
Original assignee: Scott Paper Co
Current assignee: Kimberly Clark Worldwide Inc
Priority date: 1988-10-27
Filing date: 1988-11-11
Publication date: 1991-05-02
Anticipated expiration: 2008-11-11
Also published as: ATE83811T1; EP0365726B1; DE3876996D1; GR3007234T3; DE3876996T2; AU2502688A; EP0365726A1; ES2053759T3

Abstract

The invention relates to a web of cellulosic fibres characterised in that it comprises as a water-soluble emollient an agent selected from: (A) Lauroamphoglycinate (B) A high molecular weight cationic quaternary homopolymer or copolymer derived from dimethyl ammonium salt (C) A tri-quaternary phospholipid complex derived from a fatty acid and (D) Glucose glutamate said agent being present in an amount from 0.1 to 2 percent by weight of the web.

Description

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P/00/011 PATENTS ACT 1952-19609538

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o rm l O COMPLETE SPECIFICATION

(ORIGINAL)

FOR OFFICE USE Class: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Acceptod: Published: Priority: Or ronflco,%,o.,fl',.r ,,,.r~w.0yt p 0 E 0 :iUrnr Is i .1 Related Art: 0 00 0 0 0 0000a 0 0 0 0, 0 0 o o0 000 Name of Applicant: o a 0 00 0 0 0 0 °Address of Applicant: 00 o o Actual Inventor: s: 0o~0 Address for Service: TO BE COMPLETED BY APPLICANT SCOTT PAPER COMPANY, a corporation organized and existing under the laws of the State of Pennsylvania, of Industrial Highway, at Tinicum Island Road, County of Delaware, in the State of Pennsylvania, United States of America, LARRY BOGART; JAMES J. HIPKINS; and MORRIS L. SMITH Care of James M. Lawrie Co., Patent Attorneys, of 72 Willsmere Road, Kew, Victoria, 3101, Australia.

Complete Specification for the invention entitled: CHEMICALLY TREATED PAPER PRODUCTS The following statement Is a full description of this Invention, including the best method of performing it known to me:- *Note-. The description Is to be typed In double spacing, pica type face, in an area not exceeding 250 mm In depth and 160 mm In width, on tough white paper of good quality and It Is to be Inserted Inside this form, 11110/76-L I171O/78-.L C J. TIIo~tp~oN. Camofl~ow~jIth Caov~aomont l~noot. Coo ~vsro APPUCATION ACCI;YTtL) ANU AMtNUMt.N1 ALLOW ED, To: The Conmissioner of Patents This invention relates to soft, absorbent and bulky cellulosic fibrous webs which have been treated so +hat they impart a soothing or emollient effect to the human skin when used for wiping or drying while essentially retaining their water-absorbent property and strength. The agents used in the present invention are selected from the group consisting of fatty acid based triquaternary phospholipid complexes; a formulation consisting of amphoteric lauroamphoglycinate containing a non-ionic surfactant and phosphonic acid; a glucose glutamate; and a hig" molecular weight cationic quaternary homopolymer or copolymer derived from a dimethyl dialkyl ammonium salt; or, a compatable mixture of the above.

It has heretofore been suggested to treat cellulos' fibrous webs with 7anolin to impart a feeling of softnebs to the webs. S-e, for example, Wemyss, et all., 2,877,115 and Yang, 2,944,931 or with other fatty solids, see Britt, 3,305,392. However, such a treatment has the disadvantage that the water absorbency of the cellulosic web is dramaticall; reduced by the application of these fatty-type materials, so that the web can no longer satisfactorily perform a wiping or drying function in reference to moist skin.

.oo The present invention has as its object rather than S00, imparting the feeling of softness to cellulosic webs, the 0° imparting to the human skin an emollient or soothing effect C.00 j o through wiping with a cellulosic web while retaining the 0, drying and strength characteristics of the untreated web.

S In many environments such as hospitals and clinics, persons are required to frequently wash and dry their hands. This can produce skin irritation, particularly in cold weather. Also, o o0 persons suffering from the common cold must frequently apply "o facial tissues. Also people suffering from diarrhea must use large quantities of toilet tissue. Repeated wipings with treated toilet tissue has been found to condition the perineal region so that it maintains a non-irritating c(ndition.

Likewise, a soft feeling is achieved after using facial treatment in the manner of this invention so that the nasal skin is left with a velvety soft feeling even after repeated 2 II-'U"-UI V Y ~~l No Legalization No Corporate Seal this 20th day ofNovembe990.

Signature of Declara'at S. D. Ford, Secretary To: The Commissioner of Patents L'll w. i wipes.

The present inventors have found that the water absorbency can essentially be retained while imparting a skin soothing characterto webs for drying or wiping the skin by treating soft absorbent cellulosic webs with a water soluble emollient selected from the group consisting of, a glucose glutamate; a high molecular weight cationic quarternary homopolymer or copolymer derived from a dimethyl diallyl ammonium salt; a fatty acid based triquaternary phospholipid complex; and, a formulation consisting of amphoteric lauroamphoglycinate containing a non-ionic surfactant and phosphoric acid, or, a compatable mixture thereof. Products made from such webs exhibit the ability to transfer chemicals from the cellulosic fibrous web to the skin generating emollient benefits while concomitantly successfully executing the primary function of the product which is to wipe or dry the skin. Webs treated with lanolin, by contrast, are markedly inferior in producing the desired benefits and are even perceived in some cases as irritating or to cause itching.

This may be attributable, not only to the fact that some people are allergic to lanolin, but also as observed by Jacobi, et al., 3,231,472 dry skin is not caused by the loss a of fat material in skin but by the loss of the water "t soluble constituents therein. In accordance with the present 0 205 invention the water soluble emollient compound or composition, 0 or, compatable mixture thereof is applied to a web of SI cellulosic fibers in an amount from 0.1 to 2% by weight of B0 the web. With regard to the use of a glucose glutamate it has been found that the presence of small residual amount of 00 °j13 glucose glutamate on the skin, after hand drying, materially aids in restoring and maintaining the moisture balance necessary for healthy skin. The glucose glutamate 0 condensation product is disclosed and described in detail in S U.S. Patent,3,231,472, incorporated herein by reference.

The high molecular weight cationic quaternary homopolymers or copolymers derived from a dimethyl diallyl ammonium salt are disclosed and described in detail in U.S.

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a 6 S -3- Patents 3,288,770 and 3,412,019 incorporated herein by reference. As used herein, the term "high molecular weight cationic quaternary homopolymer or copolymers derived from a dimethyl diallyl ammonium salt" refers to those water soluble polymers disclosed in said patents.

Lauroamphoglycinate is the amphoteric organic compound that conforms generally to the formula: C CH 2

CH

2 0H II I

CH

2

(CH

2 1 0 0--NH--HH 2

H

2

-N--CH

2 000Na 0 O 0 SO 0 0 0 O0 0 o a a i The triquaternary phospholipid complexes are disclosed and described in detail in U.S. Patent 4,209,449 incorporated herein by reference. As used herein, the term triquaternary phospholipid complex refers to those compounds disclosed in said patents which are derived from fatty acids, such as stearic, la'ric, linoleic and myristic. As will be readily appreciated, the fact that the compounds and compositions employed in the present invention are water-soluble totally distinguishes the treatement of the present invention from o 0 S that of the lanolin treatments of the prior art.

While the phospholipid complexes have been recognized 00 as skin moisturizers, insofar as the present inventors are 2'5 aware, they have net been employed on tissue. The high S molecular weight phospholipid complexes of the present O invention are commercially available from Mona Industries, Inc.

under the brand name MONAQUAT and MONATERGE. The stearic based complex bears the CTFA designation Stearamidopropyl 36 PG-limonium Chloride Phosphate.

The polymers derived from dimethyl diallyl ammonium slts have not been recognized as skin moisturizers although they have been disclosed for use in cosmetic products such as shampoo, U.S. Patent 3,996,146; for bleaching compositions, U.S. Patent 4,027,008; for hair coloring compositions, U.S.

Patent 3,986,825; and for hair waving compositions, U.S. Patent 3,912,808. These polymers are commercially available from c e 4 Calgon Corporation, a wholly-owned subsidiary of Merck Co., under the brand name MERQUAT.

The high molecular weight glucose glutamate polymers of the present invention are commercially available from Wickhen Products, Inc., a wholly-owned subsidiary of Dow Corning, under the brand name WICKENOL.

Summary of Invention According to a broad form of this invention there is provided a web of cellulosic fibers carrying a water soluble emollient selected from the group consisting of; a glucose glutamate; a high molecular weight cationic quaternary homopolymer or copolymer derived from a dimethyl diallyl ammonium salt; a fatty acid based triquaternary phospholipid complex; and, an amphoteric lauroamphoglycinate containing a non-ionic surfactant and phosphoric acid, or, a compatible mixture thereof, in an amount of 0.1 to 2% by weight of the web.

Detailed Description of the Invention For the purpose of illustrating the present invention, paper webs having a basis weight of 54 g/m 2 (32 pounds per ream of 2,880 square feet) were treated in the finishing process at a point after the paper has been unwound from the Sparent roll and embossed, but before the slitting, folding, cut off stacking and o. wrapping processes. The treating fluid, comprising the active ingredient dissolved 2i ;U in water, is applied at a rate to yield the addition of between 0.034 to 1.086 g/m 2 4 0 o..oo (0.02 to 0.64 pounds per ream) of the active ingredient or 0.1 to 2.0% by weight of the web. For toilet tissue such as Scott COTTONELLE or 2-ply facial, another Sexample illustrating the present invention could be paper webs having basis weight of 27 g/m 2 (16 lbs. per ream) of 2,880 square feet were treated at location similar to that disclosed above. The treating fluid comprising the active ingredients dissolved in water is applied at a rate to yield an addition of between 0.017 to j I 0.543 g/m 2 (0.01 to 0.32 lbs./ream) of the compound of 0.1 to 2% by weight of web.

'QQ Any application technique known in the art which does not unduly compact the web and which evenly distributes the flud at the desired rate onto the paper web may be employed. These application techniques include spraying, transfer roll coating and gravure printing. If compaction caused by gravure printing is considered too great to the finished product, this step may be carried out prior to the step of bulking by embossing. The amount of compaction which

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\zh W i 1 l--uuruur~-~ can be suffered is influenced by numerous variables much as the original bulk of the web, consumer expectations regarding bulk and the perceived need for patterned printing which can be achieved by gravure roll methods. The present inventors have found that ao a at a a a a a( I aP a IIo 11 U C C a' 7 Y 1 il_: -1

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the benefits perceived by users are best achieved by spraying the treating fluid onto the web.

Two sheets were prepared as follows: Example 1 A paper web having a basis weight of 31.2 pounds per ream of 2880 square feet (52.9 grams per square meter) was sprayed on one side of the sheet with a Wickenol formulation containing 3.75% glucose glutamate in solution to yield a lotionized sheet containing 0.27% glucose glutamate by weight of the web.

Example 2 A paper web having a basis weight of 33.1 pounds per ream of 2880 square feet (56.2 grams per square meter) was sprayed on one side of the sheet with Alcolac lanolin (RRT-1-200A) containing 5% lanolin in solution to yield a lotionized sheet containing 0.27% lanolin by weight of web.

Towels fabricated from sheets made in accordance with the preceding examples 1 and 2 and a control towel were tested by a panel of nurses to evaluate the condition of their hands after repeated drying of their hands. Sensory perceptions are, of course, subjective; however, the results, it is believed, Qo validly rank the towels in relation to one another. The testing procedure asked participants to compare the condition "o of their hands after four dryings with a control towel against 0 0 four dryings with a test towel. The control towel consisted of untreated paper towels, commercially available as SCOTT 0 Brand 150 0-fold towels. All test towels were kinder to 00 participants' hands than the control towel, as evidenced by the percentage stating their hands felt the same or better 00 °30 after the dryirgs. The length of time it took to dry hands with the control towel and the test towels was the same. On 00 average, the drying time was sixteen seconds. The testing procedure comprised a wash and dry sequence as follows: one .lo wash and dry with control towel, followed by one with test towel; four wash and dry sequences with control towel followed by four with test towel; and finally five with '-st towel.

In the test of towels made in accordance with Example 1 004 So 0 0

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4 Sa f -6- (Wickenol), at the end of the test 58% of the participants said their hands felt better, 17% said they felt the same and said their hands felt worse. In the test of towels made in accordance with Example 2 (lanolin) at the end of the test, 27% of the participants said their hands felt better, 9% said "hey felt the same and 64% said their hands felt worse.

Three sheets were prepared as follows: Example 3 A paper web having a basis weight of 33.5 pounds per ream of 2880 square feet (56.8 grams per square meter) was sprayed on one side of the sheet with Merquat 100 containing 4% by weight of the high molecular weight polymers of the present invention in solution to yield a lotionized sheet containing 0.2% of said polymers by weight of web.

Example 4 A paper web having a basis weight of 32.1 pounds per ream of 2880 square feet (54.5 grams per square meter) was sprayed on one side of the sheet with Merquat 100 containing 2.4% by weight of the high molecular weight polymers of the present invention in solution to yield a lotionized sheet containing 0.17% of said polymers by weight of web.

Example 'A paper web having a basis weight of 33.1 pounds per ream S*8L of 2880 square feet (56.2 grams per square meter) was sprayed .25 on one side of the sheet with Alcolac lanolin (RRT-1-200A) containing 5% lanolin in solution to yield a lotionized sheet containing 0.27% lanolin by weight of web.

Towels fabricated from sheets made in accordance with the preceding examples 3, 4 and 5 and a control towel were tested by a panel of nurses to evaluate the condition of their hands after repeated drying of their hands. Sensory perceptions are, of course, subjective; however, the results it is believed, validly rank the towels in relation to one another.

The testing procedure asked participants to compare the condition of their hands after four dryings with a control towel against four dryings with a test towel. The control towel consisted of untreated paper towels, commercially -7i ;-UI::Lr i UU-LII--II.- IIClsll~ available as SCOTT Brand 150 C-fold towels. All test towels were kinder to participants' hinds than the control towel, as evidenced by the percentage stating their hands felt the same or bettor after the dryings. The length of time it took to dry hands with the control towel and the test towels was the same. On average, the drying time was sixteen seconds. The testing procedure comprised a wash and dry sequence as follows: one wash and dry with control towel, followed by one with test towel; four wash and dry sequences with control towel followed by four with test towel; and finally five with test towel. In the test of towels made in accordance with Example 3 at the end of the test, tio-thirds of the participants said their hands felt better, one-third said they felt the same and none said their hand felt worse. In the test of a tow3l made in accordance with Example 4, 46% of the participants said their hands felt better, 38% said they felt the same and said their hands felt worse. In the test of towels made in accordance with Example 5 (lanolin) at the end of the test, 27% of the participants said their hands felt better, 9% said they felt the same an' 64% said their hands felt worse.

In the examples which follow present inventors employed a method described by them as a doctored kiss roll method. In this process, the path of the paper web is directed over an application roll which 215 rotates in the same direction as the travel of the paper.

This roll, which has a smooth surface, for example polished chrome, rotates partially submerged in a bath of the fluid to 4 4 be applied. As the roll rotates, it picks up a layer of liquid on its surface. The thickness of this layer is determined by the viscosity of the fluid. This layer is then metered to the desired thickness by doctoring the excess off of the roll. The paper, moving faster than the surface of S- the roll, then wipes the doctored layer of fluid from the roll.

The rate of application for a given paper speed and fluid is controlled by adjustment of the speed of rotation of the coating roll; the angle of wrap (contact with the roll) of the paper over the coating roll; and the type of and setting of 8 the doctor. These adjustments are made as required to deliver the desired quantity of fluid to the web for a given web speed and fluid.

Three sheets were prepared as follows: To a paper web having a basis weight of 32.8 pounds per ream of 2880 square feet (55.6 grams per square meter) was applied in the above described manner a quantiuy of Monaterge B-328 which comprises a triquaternary phospholipid complex derived from lauric acid to yield a lotionized sheet containing 0.81% of said complex by weight of web. The sheets were then converted to C-fold towels.

To a paper web having a basis weight of 32.8 pounds per ream of 2880 square feet (55.6 grams per square meter) was applied in the above described manner a quantity of Monaterge B-321 which comprises a triquaternary phospholipid complex derived from lauric acid to yield a lotionized sheet containing 0.40% of said complex by weight of web. The sheets were then converted to C-fold towels.

To a paper web having a basis weight of 32.8 pounds per ream of 2880 square feet (55.6 grams per square meter) was applied 'n the above described manner a quantity of alcolac DV-1995 containing principally lauroamphoglycinate with phosphoric acid a nonionic surfactant to yield a lotionized sheet containing 0.63% lauroamphoglycinate by S weight of web.

Example 6 ,j *This example illustrates the ability of people to discern differences and benefits from towels treated in accordance with this invention as compared to untreated towels and to N 4 appreciate that the functional properties of the treated towels "o remain unchanged. These products exhibit the ability to transfer chemicals from the cellulosic fibrous web to the skin generating emollient benefits while concomitantly successfully executing the primary function of the product which is to wipe or dry the skin.

The methodology employed involved choosing a panel of normal healthy individuals and observing whether this panel -9- L1PZI I i aYii~i (which consisted of eleven members) would be able to perceive beneficial differences amongst treated towels and untreated Scott Brand 150 C-fold towels. The towels were presented to the panel with a code number so that the sample identifications were unknown to each panelist. The investigation was carried out privately by each panelist so that there was no interaction with other panelists. Each panelist was to wash their hands with luke warm tap water and a mild liquid soap and then their hands were dried with an untreated towel. The subjects knew specifically that these towels were normal untreated towels and that these towels were utilized as a reference standard. The subjects were then asked to rewash their hands using an identical procedure and this time they were asked to dry th3ir hands with a coded unknown towel.

Included amongst the coded samples was a placebo sample containing untreated towel. After the eleven panelists had completed their evaluation, the scores were totalled and are herein shown in the Table I. Each sample was rated on a scale of zero to ten so that the maximum score would have been 110. The panelists were asked to rate the treated and untreated sample with regard to skin benefit.

Besides a subjective functional evaluation of treated verses untreated towel (especially with regard to the key towel properties of strength and absorbency) an objective laboratory test evaluation of the sample was undertaken.

These results show that the treated towel remained essentially unchanged in physical properties when compared to the untreated control.

Table I Evaluation of Treated Towels Sample Designation Rating Untreated towel used as placebo 22 Monatorgo B-328 32 Monaterge B-321 44 Lauroamphoglycinate 46 10 0 This sample clearly shows that th'Le unknown placebo sample is rated significantly lower than either of the treated variants when considered with respect to skin comfort and functionality.

0 00 00 0 0 0C 0 I I

Claims

1. A web of cellulosic fibers carrying a water soluble emollient selected from the group consisting of; a glucose glutamate; a high molecular weight cationic quaternary homopolymer or copolymer derived from a dimethyl diallyl ammonium salt; a fatty acid based triquaternary phospholipid complex; and, an amphoteric lauroamphoglycinate containing a non-ionic surfactant and phosphoric acid, or, a compatible mixture thereof, in an amount of 0.1 to 2% by weight of the web.

2. A web as claimed in claim 1, wherein the water soluble emollient is a glucose glutamate.

3. A web as claimed in claim 1, wherein the water soluble emollient is a high molecular weight cationic quaternary hoimopolymer or copolymer derived from a dimethyl diallyl ammonium salt.

4. A web as claimed in claim 1, wherein the water soluble emollient is a fatty acid based triquaternary phospholipid complex.

The web as claimed in claim 4, wherein the fatty acid is stearic acid or lauric acid.

6. A web as claimed in claim 1, wherein the water soluble emollient is an amphoteric lauroamphoglycinate containing a non-ionic surfactant and phosphoric o a acid 0000 o

7, T(,uels for drying the skin made from the web claimed in any one of S claims 1 to 6. a.

8. Toilet tissue made fro m the web claimed in any one of claims 1 to 6.

9. Facial tissue made from the web claimed in any one of claims 1 to 6. A web of cellulosic filers treated with an emollient composition, substantially as herein described with reference to any one of the Examples but exduding any comparative examples. DATED this 4th day of February 1991. SCOTT PAPER COMPANY By their Patent Attorneys: CALLINAN LAWRIE i Y 1 r ^lSkA^. S12