MXPA98000373A - Tisu products with better softness - Google Patents

Abstract

The softness of the tissues is improved by a topical treatment with a formula containing a hydrophilic solvent and a surface modifying component, which includes quaternary ammonium compounds, quaternized protein compounds, phospholipids, silicone quaternaries, phosphocopolyol polydimethylsiloxane / protein copolymer of hydrolyzed wheat, quaternized lanolin derivatives and silico emulsions

Description

TISU PRODUCTS WITH IMPROVED SOFTNESS Background of the Invention In the field of tissue development and production, considerable efforts have been directed to improve the softness of the tissue. This has been done in a variety of ways, usually by either improving the base sheet of the tissue or by adding chemicals to the tissue to provide an improved feel. The addition of mineral oil or polysiloxanes, for example, are chemicals which provide a softer feel to the surface of the tissue. However, further improvements to the softness can be achieved, as well as providing other benefits such as skin moistening, through the proper identification and application of certain ingredients.

Synthesis of the Invention It has now been discovered that treating the tissue topically with certain softening chemical compositions is made to the tissue surface especially smooth and smooth. In general, the invention resides in a tissue which has been topically treated with a hydrophilic softening composition comprising one or more of propylene glycol, polyethylene glycol, polypropylene glycol, and / or other hydrophilic solvents and one or more organic surface modifiers ( hereinafter defined).

More specifically, the invention resides in a tissue comprising from about 0.5 to about 30 percent by dry weight, based on the weight of the fiber, of a softening composition comprising one or more hydrophilic solvents selected from the group consisting of of water, propylene glycol, polypropylene glycol and polyethylene glycol, and one or more surface modifiers selected from the group consisting of quaternary ammonium compounds, quaternized protein compounds, phospholipids, silicone quaternaries, hydrolyzed wheat protein / polydimethyl siloxane, copolymer of phosphocopolyol, quaternized lanolin derivatives, and silicone emulsions.

Suitable quaternary ammonium compounds have the following structures: CH, wherein X = chloride, methyl sulfate, or other compatible contraon; and R = Cg -C saturated or unsaturated, aliphatic; wherein X = chloride, methyl sulfate, or other compatible contraon; R = C8 - C22 saturated or unsaturated, aliphatic; Y R, = benzyl or epoxy group; wherein X = methyl sulfate or other compatible contradyn; Y R = C8 - C22 saturated or unsaturated, aliphatic. wherein X = methyl sulfate, chloride, or other compatible counter-ion; , i R = C8-22 saturated or unsaturated, normal, aliphatic; Y Rj = 2-hydroxyethyl or 2-hydroxypropyl; wherein R = Cg-C saturated or unsaturated, normal or branched, aliphatic; X = chloride, methyl sulfate, ethyl sulfate or other compatible contradyne; R '= 2-hydroxyethyl or polyethoxyethanol; Y n = 1 to 50; 0 0 II CH, // R-C-0-CH2-CH2-N-CH2-CH2-0-C-R CH2-0H where R = Cg - C ^; Y X = methyl sulfate, chloride, or other compatible counter; CH, CH.-N-R 3 CH, wherein R = Cg -C n saturated or unsaturated, aliphatic; or alilo-; or R '-0-CH2-CH2-CH2. Where R '= C-Clg normal or branched; Y X = chloride, sulfate or other compatible contradyne; wherein R = Cg-C22, saturated or unsaturated, normal or branched, aliphatic alkyl; Y X = chloride, methyl sulfate, or other compatible counter.

Suitable quaternized protein compounds include the following structures: 0 OH 11, CH 3 1, -C-NH- (CH 2) -N-CH 2 CH-CH, CH, wherein R, = C, 2-C22 saturated or unsaturated, fatty acid radical; R2 = hydrolyzed soy protein, hydrolyzed silk protein, hydrolyzed wheat protein, half of collagen, or half of keratin; Y X = chloride, lactate or other compatible contradyne; wherein R1 = CI2-C22, saturated or unsaturated, fatty acid radical; R2 = hydrolyzed collagen or keratin moiety; X = chloride, lactate, or other compatible contrayón.

Suitable phospholipids include, without limitation, those having the following structures: where x = 1 to 3; x + y = 3; a = 0 to 2; B = O "or OM; A = an anion; M = a cation; Y R, Rt & R2 may be the same or different, are alkyl, substituted alkyl, alkyl aryl or alkenyl groups of up to 16 carbon atoms and the total carbon atoms of R + R, + R2 = 10 to 24; + 0 n N-CH, • CH-CH2-0 P- (B) y + xA * aM L- R ", *? * Where x« 1 to 3; x + y = 3; a = 0 to 2; B = 0"or OM; A = an anion; M = a cation; Y R5, R6 may be the same or different, are alkyl, hydroxyalkyl, carboxyalkyl of up to C6, or polyoxyalkylene of up to C, 0; or R5, R6 and the nitrogen to which they are attached can represent an N-heterocycle; Y R7 = an amidoamine group of the formula: (CH2) r where n = 2 to 6; R3 = hydrogen or alkyl, hydroxyalkyl or alkenyl of up to 6 carbons; or cycloalkyl of up to 6 carbon atoms, or polyoxyalkylene of up to 10 carbon atoms; Y R4 = alkyl, alkenyl, alkoxy or hydroxyalkyl, C $-C2 ?, or aryl or alkaryl up to C ^; 0 ++ II R-M-CH 2 -CH-CH, -0-P-0-CH 2 -CH-CH 2 -N-R 2A i R, OH OM OH where A = an anion; M = a cation; R, R, and R2 may be the same or different, are alkyl, substituted alkyl, alkyl aryl or altkenyl groups of up to 16 carbon atoms, and the total carbon atoms of R + R, + R2 = 10 to 24; Y R 'is a half amidoamine of the structure where n = 2 to 6; R3 = hydrogen or alkyl, hydroxyalkyl or alkenyl of up to 6 carbons; or cycloalkyl of up to 6 carbon atoms, or polyoxyalkylene of up to 10 carbon atoms; Y R8 has the following structure: where n = 3 or greater; p = 1 to 1,000; q = 1 to 25, Suitable silicone quaternaries include those having the following structure: wherein R * alkyl group, C12-Clt; Z = -CH2-CH2-CH2-0- (CH2) 3-; X = alkoxy, chloride or other compatible counter; Y n = 1 to 50.

Suitable organoreactive polysiloxanes include the following structures: wherein R = amine, carboxy, hydroxy or epoxy; n = 3 or greater; x = l to 1,000; Y y = 1 to 25.

The aggregate amount of the hydrophilic softening composition containing the surface modifier (s) and the hydrophilic solvent (s) can be from about 0.5 to about 30 percent by dry weight based on the weight of the tissue, more specifically from about from 1 to about 10 percent by dry weight. The water can be added to the formula to reduce the viscosity of the composition and to make the formulas more suitable for the application. The amount of the surface modifier in the hydrophilic softening composition can be from about 0.2 to about 80 percent by weight, more specifically from about 0.5 to about 50 percent by weight, and even more specifically from about from 1 to around 20 percent by weight.

The amount of the silicone emulsion, if included in the hydrophilic softening composition, can be from about 1 to about 80 percent, more specifically from about 5 to about 50 percent, and even more specifically from from around 5 to around 20 percent.

Other optional ingredients include aloe, moisturizers, skin protectors, preservatives, and sensory modifiers. Suitable humectants include lactic acid and its salts, sugars, glycerin, epoxylated glycerin, ethoxylated laniline, corn syrup, hydrolyzed starch hydrolyzate, urea, and sorbitol. Suitable skin protectants include alentoin, calolina, allantoin, and zinc oxide. Suitable preservatives include Quaternium-15, organic acids, parabens, DMDM hydantoin, diazolidinyl urea, methylchloroisothiazoline, methylisothiazoline, sodium hydroxymethyl glycinate, imidazolidinyl urea, and the like. Suitable sensing modifiers include corn starch, oatmeal, talc, boron nitride and cyclodextrin.

The hydrophilic softening composition which may be in the form of a solution or a suspension, may be applied to the dried tissue surface by any suitable means, such as spraying or printing.

The tissue to which the hydrophilic formula is applied can be any useful tissue such as a facial tissue, a bath tissue, or towels. These can be produced by continuous drying or wet compression tissue manufacturing processes and can be creped or non-creped, layered or mixed (without layers). The finished tissue product may be a stratum, two strata or three or more strata. Either the side of the dryer or the air side of the tissue can be oriented outwardly into the final tissue product.

E J E M P L O S E a g e 1 A hydrophilic solution consisting of 50 parts by weight of propylene glycol, 28.5 parts by weight of a softener / debonder composition (quaternary imidazolinium, fatty acid alkoxylate and polyether with a molecular weight of 200-800, identified as DPSC 5299-8 , from Witco Corporation) and 21.5 parts by weight of water. The polypropylene glycol and the DPSC 5299-8 were mixed together until uniformed. Then the water was added and the mixture was stirred until a homogeneous solution was achieved. Using a gravure printing method, the resulting hydrophilic solution was applied to the outer surfaces of the two outer layers of a wet compressed creped tissue, mixed with three strata having a basis weight of 41.6 grams per square meter. The supply for each stratum consisted of a mixture of 50 percent hardwood eucalyptus, 14 percent by weight kraft hardwood from the north, and 36 percent softwood kraft fiber from the north. The aggregate amount was about 1 percent by dry weight based on the total weight of the three-layer tissue. The resulting tissue had a hairy softness.

Example 2 A hydrophilic solution consisting of 90 parts by weight of propylene glycol and 10 parts by weight of DPSC 5299-8 was prepared. Propylene glycol and DPSC 5299-8 were mixed together until a homogeneous solution was achieved. The resulting hydrophilic solution was applied to the outer surfaces of the two outer layers of a creped wet crepe, mixed with three layers (as described in Example 1) having a basis weight of 41.6 grams per square meter using a method of gravure printing. The amounts added were about 1, 3 and 10 percent by dry weight based on the total weight of the tissue. The resulting tissues had a hairy softness, with the top aggregate tissues feeling softer.

Example 3 A hydrophilic solution consisting of 80 parts by weight of propylene glycol and 20 parts by weight of a quaternary ammonium compound (stearalkonium chloride, 25 percent active, identified as Mackernium SDC-25, was prepared from Mclntyre Group, LTD.). The propylene glycol and the Mackernium SDC-25 were mixed together and stirred until they were homogeneous. The resulting hydrophilic solution was applied to the outer surfaces of the two outer layers of a three-layer wet creped crepe as described in Example 1 having a basis weight of about 41.6 grams per square meter using a method of printing photoengraving. The amounts added were about 1, 3 and 10 percent by dry weight based on the weight of the tissue. The resulting tissue had a velvety softness with the higher added tissues being softer.

Example 4 A hydrophilic solution consisting of 70 parts by weight of propylene glycol, 10 parts by weight DPSC was prepared 5299-8 and 20 parts by weight of a second quaternary ammonium compound (50% active olealconium chloride, identified as Mackernium KP, from Mclntyre Group, LTD.). Polypropylene glycol and DPSC 5299-8 were mixed together. The Mackernium KP was added and stirred until homogeneous.

Using a gravure printing method, the resulting hydrophilic solution was applied to the outer surfaces of the two outer layers of a three layer interleaved wet creped tissue as described in Example 1 a creped tissue wet compressed into layers of three strata having a basis weight of about 41.6 grams per square meter. Each layer of the layered tissue contains three layers. The outer layer on the dryer side consisted of eucalyptus fibers. The inner layer contained 28 percent northern hardwood kraft fibers and 72 percent northern softwood kraft fibers. The outer layer of the air side contained soft wood kraft fibers from the north and northern hardwood kraft. Ky ene 557H (from Hercules, Inc.) was added at 0.16 - 0.34 percent by weight based on dry fiber in all layers. A moisture resistance agent (Parez 631NC from Cytec Industries, Inc.) was added at 0.45-0.55 percent by weight based on the dry fiber in the inner layer and in the air side layer. The three-layer tissue was folded together so that the two outer surfaces were the layers from the side to the dryer. The aggregated amounts of the hydrophilic solution were about 1 and 2 percent by dry weight based on the total weight of the tissue. The resulting tissue products were very soft, with the highest added tissues being softer.

Example 5 A hydrophilic solution consisting of 50 parts by weight of propylene glycol, 20 parts by weight of DPSC 5299-8 and 30 parts by weight of Mackernium KP. Propylene glycol and DPSC 5299-8 were mixed together. Mackernium KP was added and agitated until homogeneous. Using a gravure printing method, the resulting hydrophilic solution was applied to the outer surfaces of the two outer layers of a three-layer wet creped and compressed tissue as described in Example 1 and a creped tissue compressed in wet, in layers of three strata as described in Example 4. The aggregate amounts were about 1 and 2 percent by dry weight based on the weight of the tissue. The resulting tissue products were very soft, with the highest added tissues being softer.

Example 6 A hydrophilic solution consisting of 80 parts by weight of propylene glycol, 10 parts by weight of DPSC 5293-8 and parts by weight of an organoreactive polysiloxane (identified as FTS-226, 40 percent active, OSi Specialties, Inc.). Propylene glycol and DPSC 5299-8 were mixed together until uniform. Then the FTS-226 was added and the mixture was stirred until a homogenous solution was achieved. Using a gravure printing method, the resulting hydrophilic solution was applied to the outer surfaces of the two outer layers of a three layer mixed wet creped, creped tissue as described in Example 1. The aggregate amount was about of 1 and 5 percent by dry weight based on the weight of the tissue.

The resulting tissue had a smoothness.

Example 7 A hydrophilic solution consisting of 40 parts by weight of propylene glycol, 10 parts by weight of DPSC 5299-8 and 50 parts by weight of FTS-226. Propylene glycol and DPSC 5299-8 were mixed together until uniform. Then the FTS-226 was added and the mixture was stirred until a homogeneous solution was achieved. Using a gravure printing method, the resulting hydrophilic solution was applied to a three layer, wet compressed creped tissue and mixed as described in Example 1 and in layers, three strands of creped wet crepe as described. in Example 1 and a three-layered wet compressed creped tissue as described in Example 4. The aggregate amount was about 1 and 2 percent by dry weight based on the weight of the tissue. The resulting tissues had a rounded sensation.

Example 8 A hydrophilic solution consisting of 55 parts by weight of propylene glycol, 20 parts by weight of DPSC 5299-8 and 25 parts by weight of FTS-226. Propylene glycol and DPSC 5299-8 were mixed together until they were uniform.

The FTS-226 was added and the mixture was stirred until a homogeneous solution was achieved. Using a gravure printing method, the resulting hydrophilic solution was applied to both a three-layered moist compressed creped tissue mixed as described in Example 1 and a three layer layered wet creped crepe as described in Example 4. The aggregate amount was about 1 and 2 percent by dry weight based on the weight of the tissues. The resulting tissues had a smoothness with the top added tissue being softer.

Example 9 A dried tissue was made through the uncreped air of a stratum using a layered headbox. The two outer layers contained kraft pulp of bleached eucalyptus hardwood processed through a shaft disperser Maule with a force input of 80 kilowatts at a consistency of about 34 percent and at a temperature of 184 degrees F. The two outer layers constituted 70 percent of the tissue sheet per fiber weight. The remaining 30 percent of the tissue constituted the middle layer and consisted of a softwood kraft pulp from the bleached north. The total basis weight of the sheet was 33.9 grams per square meter of a tissue dried by air. The inner layer was refined to obtain sufficient dry strength in the final product. A wet strength agent, Parez 631NC, was dosed into the inner layer at a rate of 5 kilograms per metric ton or 0.5 percent of the weight of the fiber. A softener / deburrer (DPSC-5299-8) was added to the thick supply of hardwood at 0.525 percent of the total fiber weight. After drying, the tissue of a stratum was printed with a formula consisting of about 12 percent Mackernium SDC, about 30 percent glycerin, about 50 percent propylene glycol and about 8 percent water. The resulting tissue contained about 0.5 percent by weight of DPSC-5299-8 and about 4 percent by weight of the printed fiber-based formula. The resulting tissue had a silky smooth surface feel.

It will be appreciated that the foregoing Examples are given for purposes of illustration, but should not be considered as limiting the scope of the invention, which is defined by the following claims and all equivalents thereof.

Claims (20)

R E I V I N D I C A C I ON E S

1. A tissue comprising from about 0.5 to about 30 percent by dry weight, based on the weight of the fiber, of a softening composition comprising one or more hydrophilic solvents selected from the group consisting of water, propylene glycol, polypropylene glycol, and polyethylene glycol, and one or more surface modifiers selected from the group consisting of quaternary ammonium compounds, quaternized protein compounds, phospholipids, silicone quaternaries, phosphocopolyol polydimethylsiloxane / hydrolyzed wheat protein copolymer, quaternized lanolin derivatives, and silicone emulsions.

2. The method as claimed in clause 1 characterized in that at least one of the surface modifiers is a quaternary ammonium compound having the following structure: wherein X = chloride, methyl sulfate, or other compatible contractant; and R = Cg-C22 saturated or unsaturated, aliphatic.

3. The method as claimed in clause 1 characterized in that at least one of the surface modifiers is a quaternary ammonium compound having the following structure: wherein X = chloride, methyl sulfate, or other compatible contraon; R = Cg - C22 saturated or unsaturated, aliphatic; Y R, = benzyl or epoxy group.

4. The method as claimed in clause 1 characterized by at least one of the surface modifiers is a quaternary ammonium compound having the following structure: wherein X = methyl sulfate, or other compatible counter-ion; Y R = C8 - C22 saturated or unsaturated, aliphatic.

5. The tissue as claimed in clause 1 characterized in that at least one of the softener / debonder is a quaternary ammonium compound having the following structure: wherein X = methyl sulfate, chloride, or other compatible counter-ion; R = C8 - C22 saturated or unsaturated, normal, aliphatic; Y R, = 2-hydroxyethyl d 2-hydroxypropyl;

6. The tissue as claimed in clause 1 characterized in that at least one of the softener / debonder is a quaternary ammonium compound having the following structure: wherein R = C8-C ^, saturated or unsaturated, normal or branched, aliphatic; X = chloride, methyl sulfate, ethyl sulfate or other compatible contradyne; = 2-hydroxyethyl or polyethoxyethanol; Y n = 1 to 50

7. The tissue as claimed in clause 1 characterized in that at least one of the softener / debonder is a quaternary ammonium compound having the following structure: where R = C «- C 22 ' X = methyl sulfate, chloride, or other compatible contrayson.

8. The tissue as such and "as is" is claimed in clause 1 characterized in that at least one of the softener / debonder is a quaternary ammonium compound having the following structure: wherein R = C, 8 C22, saturated or unsaturated, aliphatic; or alilo-; or R '-0-CH2-CH2-CH2. Where R '= normal or branched C4-C18; and X • chloride, sulfate or any other compatible counter,

9. The tissue as claimed in clause 1 characterized in that at least one of the softener / debonder is a quaternary ammonium compound having the following structure: CH, CH.-N-R 3 and CH, wherein R = C 8 -C n, saturated or unsaturated, normal or branched, aliphatic alkyl; Y X = chloride, methyl sulfate, or other compatible contrayón.

10. The method as claimed in clause 1 characterized in that at least one of the surface modifiers is a quaternized protein compound having the following structure: -C-NH- < CH2) -y-CH2-CH-CH2-2 CH, wherein Rj = C 12 -C 4, saturated or unsaturated, fatty acid radical; R2 = hydrolyzed soy protein, hydrolyzed silk protein, hydrolyzed wheat protein, half of collagen, or half of keratin; Y X = chlorine, lactate or other compatible contradyne.

11. The method as claimed in clause 1 characterized in that at least one of the surface modifiers is a quaternized protein compound having the following structure: wherein R, = C, 2-C22, saturated or unsaturated, fatty acid radical; R2 = a hydrolyzed collagen or half of keratin; X = chlorine, lactate, or other compatible contradyne,

12. The tissue as claimed in clause 1 characterized in that at least one of the softener / debonder is a phospholipid having the following structure: xA + aM where x = 1 to 3; x + y = 3; a = 0 to 2; B = O "or OM; A = an anion; M = a cation; Y R, R, & R2 may be the same or different, are alkyl, substituted alkyl, alkyl aryl or alkenyl groups of up to 16 carbon atoms and the total carbon atoms of R + R, + R2 = 10 to 24.

13. The tissue as claimed in clause 1 characterized in that at least one of the softener / debonder is a phospholipid having the following structure: 0 fi «R, -N-CH, -CH-CH, -0 -P- (B), + xA + aM i. OH where x = 1 to 3; x + y = 3; a = 0 to 2; B = O "or OM; A = an anion; M = a cation; Y R5, R6 may be the same or different, they are alkyl, hydroxyalkyl, carboxyalkyl of up to C6, or polyoxyalkylene of up to C10; or R5, R6 and nitrogen are linked to represent an N-heterocycle; Y R7 = amidoamine half of the formula: where n = 2 to 6; R3 = hydrogen or alkyl, hydroxyalkyl or alkenyl of up to 6 carbons; or a cycloalkyl of up to 6 carbon atoms, or of polyoxyalkylene of up to 10 carbon atoms; Y R4 = alkyl, alkenyl, alkoxy or hydroxyalkyl, C5-C21, or aryl or alkaryl up to C20.

14. The tissue as claimed in clause 1 characterized in that at least one of the softener / debonder is a phospholipid having the following structure: fi 0 ++ II R-Ñ-CH.-CH-CHj-OPO-CH.- CH-CH.-Ñ-R '2A OH OM OH where A = an anion; M = a cation; R, Rj and R2 may be the same or different, are alkyl, substituted alkyl, alkyl aryl or altkenyl groups of up to 16 carbon atoms, and the total carbon atoms of R + R, + R2 = 10 to 24; Y R 'is a half amidoamine of the structure: where n = 2 to 6; R3 = hydrogen or alkyl, hydroxyalkyl or alkenyl of up to 6 carbons; or cycloalkyl of up to 6 carbon atoms, or polyoxyalkylene of up to 10 carbon atoms; Y R8 has the following structure: where n = 3 or greater; p = 1 to 1,000; Y q = 1 to 25

15. The method as claimed in clause 1 characterized in that at least one of the surface modifiers is silicone quaternary having the following structure: wherein R = C 12 -C, alkyl group; Z = -CH2-CH2-CH2-0- (CH2) 3-; Y n = 1 to 50.

16. The method as claimed in clause 1 characterized in that at least one of the surface modifiers is an organoreactive polysiloxane having the following structure: wherein R = amine, carboxy, hydroxy or epoxy; n = 3 or greater; x = 1 to 1,000; Y y = 1 to 25.

17. The method as claimed in clause 1, characterized in that at least one of the surface modifiers is an organoreactive polysiloxane having the following structure: wherein R = amine, carboxy, hydroxy or epoxy; n = 3 or greater; Y x = 1 to 1, 000.

18. The method as claimed in clause 1 characterized in that at least one of the surface modifiers is an organoreactive polysiloxane having the following structure: CH, CH, CH, R -. (CH2) n-Si-0- (S1-0)? - Si-CH, CH, CH, CH, wherein R = amine, carboxy, hydroxy or epoxy; n = 3 or greater; Y x = 1 to 1, 000.

19. A tissue comprising from about 1 to about 10 percent by dry weight, based on the weight of the fiber, of a topically applied softening composition comprising propylene glycol and one or more of a quaternary ammonium compound selected from the group consists of methyl-1-alkyl amidoethyl-2-alkyl imidazolinium methyl sulfate, stearalkonium chloride, and olealkonium chloride.

20. The tissue as claimed in clause 19, characterized in that the softening composition further comprises an organoreactive polysiloxane. SUMMARIZES The softness of the tissues is improved by a topical treatment with a formula containing a hydrophilic solvent and a surface modifying component, which includes quaternary ammonium compounds, quaternized protein compounds, phospholipids, silicone quaternaries, phosphocopolyol polydimethylsiloxane / protein copolymer of hydrolysed wheat, quaternized lanolin derivatives and silicone emulsions.