MXPA97004044A - Soft hygienic paper and sponge - Google Patents

Abstract

The present invention relates to a soft accrued toilet paper, which comprises: a) fibers for papermaking, and b) a biodegradable composition, which facilitates the accretion, said composition comprises: i) from about 0.02% to about 1.0% by weight of a biodegradable binding inhibitor, based on the dry weight of papermaking fibers, the inhibitor has the formula: wherein each substituent R2 is a hydroxyalkyl group or C1-C6 alkyl, a group benzyl or mixtures thereof, each substituent R1 is a C12-C22 hydrocarbyl group, or a substituted hydrocarbyl group or mixtures thereof, each substituent R3 is a C11-C23 hydrocarbyl group, or a substituted hydrocarbyl group or mixtures thereof; Y is -0-C (O) - or C (O) -O- or NH-C (O) - or C (O) -NH- or mixtures thereof, n is 1 to 4 and X = is a suitable anion, ii) from about 0.02% to about 0.5% by weight, of a water soluble carboxymethyl cellulose, with based on the dry weight of the fibers for papermaking, wherein the carboxymethylcellulose has a degree of substitution ranging from about 0.3 to about 1.4, and iii) from about 0.05% to about 3.0% by weight, of a starch cationic, based on the weight of the fibers for papermaking, wherein the cationic starch has a degree of substitution ranging from about 0.01 to about 0

Description

SOFT AND SPONGEED HYGIENIC PAPER BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to foamed toilet paper products and the processes for making it. More particularly, it refers to foamed toilet paper, made by the dry crepitation process, where an embryonic coil is formed in a Fourdrinier strip, excess water is removed, adhesively secured to a Yankee dryer while it is in a semi-dry condition, and is crackled by the Yankee dryer after reaching an essentially dry condition. Foamed toilet paper products can be used for strong and soft paper products, such as toilet tissue products and facial tissues. BACKGROUND OF THE INVENTION Disposable toilet paper products are widely used. These products are offered commercially in formats designed for a variety of uses, such as facial tissues, toilet paper and rolls of kitchen towels. The formats, for example, basic weight, thickness, strength, size of the sheet, means of supply of these products, often differ widely, but are united by the common process, by means of which they are generally produced, the process called of dry crepitation. In addition, they are linked by the common desire of the consumer for a pleasant impression to the touch, for example, the softness. Softness is a sensation of touch, perceived by the consumer as he holds a particular product, rubs it on his skin, or wrinkles it in his hands. This sensation of touch is provided by a combination of several physical properties. One of the most important physical properties, related to the softness, is generally considered, by those skilled in the art, as the consistency of the paper reel, from which the product is manufactured, at the same time, it is generally considered that the consistency depends directly on the resistance of the paper reel. The resistance is the capacity of the product, and the coils that constitute it, to maintain its physical integrity, and to resist breakage, blowout and defibration, under normal conditions of use. The manufacture of paper in general and specifically, the manufacture of fluffy toilet paper is an old art. As such, it has taken many years to develop in order to continuously satisfy the consumer's desires for ever-increasing consumption, through a growing economy, too. This long history has made it possible for papermaking machines to grow in size and have a faster speed. The size and scale of these processes, at present, frequently limit the ability of the product designer to effectively cover the needs of the consumer, mentioned above, such as touch printing and product resistance, without sacrificing of the gains obtained in the capacity of the machinery. Those skilled in the art will recognize that this is primarily because many of the factors that are known to positively affect the feel impression of the product tend to be adversely affected by the size and, in particular, the speed of the product. paper manufacturing and creping process. Research and development efforts have focused on improving softness or, at least, preserving the quality of softness, while at the same time, continue to increase the production capacity of machinery units for manufacturing paper. Crackling is a means to mechanically compact the paper, in the direction in the machine. The result is an increase in base weight (mass per unit area), as well as dramatic changes in many of the physical properties of the same, particularly when measured in the machine direction. Crackling is usually done with a flexible blade, called "scalpel", against the Yankee dryer in a machine that is in operation. In foamed paper technology, the reduction in crepitation percentage (the amount by which the paper coil is foreshortened during crepitus) of the creping process of papermaking, allows the base weight of the traveling coil through the process until the crepitation blade is increased, without increasing the base weight of the final product. Papermaking generally increases efficiency, based on base weight gain; therefore, it is desirable to use a crepitation percentage, as low as would otherwise be allowed, by the process and the product. A Yankee dryer is a drum with a large diameter, generally 8 to 20 feet, which is designed to be pressurized by steam, to produce a hot surface to finish the drying of the papermaking coils at the end of the process of paper manufacture. The paper roll, which is first formed on a foraminous paper-forming conveyor, such as a Fourdrinier strip, where a copious amount of water, necessary to disperse the fibrous pulp, is extracted, is generally transferred to a felt and material in a section called pressing, where the extraction of the water continues, either by compacting the paper mechanically, or by some other method of extracting the water, such as by drying with hot air, before finally transferring the paper reel, in a semi-dry condition to the surface of the Yankee dryer so that the drying operation is completed. The paper roll has a natural adhesion to the surface of the Yankee dryer. One skilled in the art will recognize that adhesion is the result, primarily, of the action of water and coating on the Yankee dryer, this coating comprising the soluble or residual components of the papermaking composition, which accumulate. on the surface of the dryer with continuous operation. Frequently, the achieved adhesion of the semi-dry coil to the surface of the Yankee dryer, which rises from this natural coating, is insufficient. The result is that the product is joined by sautéed creping areas, which gives the product a defective appearance and its operation and operation are plagued by the low tension in the paper sheet, which allows the zigzag and ripple of the coil, making it difficult to wind a wrinkle-free roll, neat enough, to be used in subsequent necessary operations, to convert the paper coil into your finished product. Those skilled in the art will recognize that the difficulty in achieving sufficient adhesion of travel from the semi-dry coil to the Yankee dryer will be more pronounced when the moisture content of the coil is very low. Another factor is the fraction of the surface of the coil, which is adhered to the surface of the Yankee dryer. In particular, the process for making paper for making a densified pattern paper, such as the one described by Sanford and Sisson in the United States Patent No. 3,301, 746 issued on January 31, 1967 and its progeny, are particularly prone to the deficiencies described above, in natural adhesion. The process of Patent No. 3, 301, 746 and its progeny create a coil with a relatively low moisture content in the transfer and only a fraction of the surface of the coil is adhered to the Yankee dryer. When the natural adhesion is too low, it is sometimes supplemented with the addition of adhesion promoters. Such adhesion promoters can be added to the papermaking composition before reaching the Fourdrinier band, or they can be added by spraying them onto the surface of the coil or on the surface of the Yankee dryer.

An example of a supplemental adhesion promoter, recommended to be added to the papermaking composition, is provided by Latimer in U.S. Patent No. 4,406,737, which discloses a method for creping paper, which comprises the incorporation of a cationic addition polymer soluble in water, in a paper reel or the pulp for papermaking, subsequently forming a paper reel. An example of a recommended composition for spraying on the surface of the coil or on the Yankee dryer is provided by Bates in U.S. Patent No. 3,926,716, where a process for the manufacture of a roll of soft toilet paper is described. Absorbent, which comprises the application of an aqueous solution of polyvinyl alcohol, to cause adhesion of the coil on a cylindrical rotating surface. Adhesion auxiliaries of this type are effective in raising the level of adhesion to the dryer, which can be vital to the process, to manufacture a strong and fluffy soft toilet paper, especially with a densified type pattern. However, these adhesion aids have no appreciable positive effect whatsoever, to allow a 'reduction in the percentage of crepitus. Undoubtedly, the improvement in the adhesion, frequently causes the tension in the coil, between the creping blade and the winding of the coil, so that it is tight, making necessary an increase in the percentage of crepitation, to avoid the frequent breakages due to excessive stretching, when these materials are used.

Chemical unlinking agents have been described in several references, such as US Patent No. 3,554,862, issued to Hervey and associates, issued January 12, 1971. These materials include quaternary ammonium salts, such as cocotrimethylammonium chloride, chloride of oleyltrimethylammonium, di (hydrogenated) tallow dimethyl ammonium chloride and stearyltrimethyl ammonium chloride. Shaw also teaches, in US Pat. No. 3,821,068, issued June 28, 1974, that chemical strippers can be used to reduce stiffness, and thereby increase the softness of a roll of toilet paper. Emanuelsson and associates teach in the Patent US No. 4, 144, 122. issued March 13, 1979, the use of quaternary ammonium complex compounds, such as the bis (alkoxy (2-hydroxy) propylene) chlorides of quaternary ammonium, to soften the coils of paper. Armak Company of Chicago, Illinois, describes in its newsletter 76-17 (1977), the use of di (hydrogenated) ammonium tallow dimethyl chloride, in combination with fatty acid esters of polyoxyethylene glycols to impart both softness and absorbency to the toilet paper rolls. Conventional quaternary ammonium compounds, such as the well-known dialkyl dimethyl ammonium Jro salts (eg, dimethyl ammonium diphenyl chloride, dimethyl methyl dimethyl ammonium sulfate, di (hydrogenated) tallow dimethyl ammonium chloride, etc.) are effective inhibiting agents of the chemical bond. These quaternary ammonium compounds are not biodegradable.

Although they promote the softness of the paper rolls, all these materials are expected to have adverse effects on the paper product, more particularly, a reduction in the strength of the paper rolls that contain them, due to their tendency to inhibit the formation of fiber to fiber links. Becker et al. Describe in US Pat. No. 4,158,594, issued January 19, 1979, a method that they hold, which will form a strong and smooth fibrous sheet. More specifically, they teach that the resistance of a roll of toilet paper (which can be softened by the addition of chemical release agents) can be increased by adhering, during the process, a surface of the coil to a creping surface with a design fine pattern, by means of a bonding material (such as a latex acrylic rubber emulsion, a water soluble resin or an elastomeric bonding material), which has been adhered to a surface of the paper roll and to the creping surface at the design with a fine pattern, and the paper coil has crackled, from the creping surface, to form a sheet of material. The use of resins to increase the strength of a paper reel is widely known. For example, Westfelt describes a number of such materials and explains their chemistry, in Cellulose Chemistry and Technology, Volume 13, on pages 813 through 825 (1979). Freimark and associates mention in US Patent No. 3,755,220, issued August 28, 1973, that certain chemical additives, known as release agents, interfere with the natural bond of fiber to fiber that occurs during the formation of the leaf in the paper manufacturing process. This reduction in the bond, leads to a sheet of paper softer, or less rough. Freimark and associates continue to teach the use of wet strength resins, in conjunction with the use of unlinking agents, to compensate for the undesirable effects of unlinking agents. Unfortunately, the amount of loss of resistance that can be compensated in this way is limited, One reason for this is that the resilience effects of the resins decrease rapidly in the low density structures of the toilet paper, as its substantivity wears out. In addition, the addition of resistance resins to counteract the harmful effects of the binding inhibitors, does not necessarily resolve other side effects of the uncloggers in the process, the most notable being a decrease in adhesion to the Yankee dryer, which causes the aforementioned operating difficulties. Consequently, the use of chemical binding inhibitors of the aforementioned types has been relegated to relatively minor levels of incorporation and, therefore, to a relatively minor influence on the finished product. Therefore, it is an object of the present invention to provide a papermaking composition capable of being converted into foamed paper products that are both strong and soft. Another additional object of the present invention is to provide a papermaking composition, which improves the operating efficiency of the dry creping process. These and other objects are obtained by applying the present invention, as will be readily appreciated, after reading the following description SUMMARY OF THE INVENTION The present invention provides products of fluffy, strong and soft toilet paper and a process for the production thereof, by the use of a biodegradable composition, which facilitates crepitus. In summary, the soft and strong sponge toilet paper comprises: a) fibers for the manufacture of paper; and b) a biodegradable composition, which facilitates crepitation, said composition comprising: i) from approximately 0.02% to approximately 1. 0% by weight, of a biodegradable binding inhibitor, based on this percentage, on the dry weight of the fibers for papermaking; ii) from approximately 0.02% to approximately 0. 5% by weight, of a water soluble carboxymethyl cellulose, based on this percentage, on the dry weight of the papermaking fibers; and iii) from about 0.05% to about 3.0% by weight, of a cationic starch, based on said percentage, on the dry weight of the papermaking fibers, wherein said biodegradable binding inhibitor is preferably present, in a proportion, relative to carboxymethyl cellulose of from about 1: 5 to about 5: 1, more preferably, said biodegradable binding inhibitor is present in a ratio, relative to carboxymethyl cellulose of from about 1: 2 to approximately 2: 1. Preferably, the biodegradable binding inhibitor of the present invention is a biodegradable quaternary ammonium compound having the formula: R2 (CH2) n - Y - R3 / N * X - / R2 (CH2) n - Y - R3 R2 (CH2) n - Y - R3 \ / N + / \ R2 R1 R3 - Y - CH2 CH - CH2 - * - (R2) 3 X " R3 - Y wherein each substituent R2 is an alkyl or hydroxyalkyl group of C 1 to C 6, benzyl group or mixtures thereof; Each substituent Ri is a C 12 to C 22 hydrocarbyl group, or a substituted hydrocarbyl group or mixtures thereof; each substituent R 3 is a hydrocarbyl group of C 1 to C 23, or a substituted hydrocarbyl group or mixtures thereof; Y is -O-C (O) - or C (O) -O- or -NH-C (O) -O-C (O) -NH-, and mixtures thereof; n is from 1 to 4 and X- is a suitable anion, for example, chloride, bromide, methyl sulfate, ethyl sulfate, nitrate and the like. Examples of the quaternary ammonium functional ester compounds suitable for use in the present invention as linker inhibitors, include those compounds having the formulas: 0 II (CH3) 2 • N + - ((CH2) 2 - 0 - C - R3) 2 CC O and 11 (CH3) 2 - N * - (CH2) 2 • 0 - C - R3 CC Q < Y (CH3) (HO. (CH2) 2) - N + - ((CH2) 2 - O - C - R3) 2 CH3SO4- Y R3 - C - O - CH2? CH - CH2 - N + - (R2) 3 CC / R3 - C - O wherein each substituent R2 is an alkyl or hydroxyalkyl group of C 1 to C 6, benzyl group or mixtures thereof; each substituent Ri is a hydrocarbyl group, or substituted hydrocarbyl group or mixtures thereof; each substituent R3 is a hydrocarbyl group of C 1 to C23, or substituted hydrocarbyl or mixtures thereof. These compounds can be considered to be the mono or diester variations of the dialkyldimethylammonium salts, which are well known, such as diester diester dimethyl ammonium chloride; diestearyl dimethyl ammonium diester chloride, dimethyl ammonium monoester dimethyl ammonium chloride, tallow di (hydrogenated) dimethyl ammonium methylsulfate, di (hydrogenated) diester dimethyl ammonium chloride, di (hydrogenated) dimethyl ammonium monoester chloride, and mixtures of the same and diester variations of sodium chloride (unhydrogenated) dimethyl ammonium, diuretic chloride (hydrogenated to the touch) dimethyl ammonium (DEDTHTDMAC) and chloro di tallow (hydrogenated) dimethyl ammonium (DEDHTDMAC), and mixtures being preferred thereof. Depending on the requirements of the product characteristics, the level of saturation of the design can be prepared from the non-hydrogenated (soft) to the touch, until partially or completely hydrogenated (hard). Without being committed to the theory, it is believed that the ester portion (s) provide biodegradability to these compounds. It is very important that the quaternary ammonium functional ester compounds used in the present invention biodegrade faster than conventional chemical dialkyl dimethyl ammonium softeners. Preferably, the quaternary ammonium bond inhibitor is present in a weight ratio of from about 1: 5 to about 5: 1 compared with carboxymethyl cellulose. More preferably, the quaternary ammonium bond inhibitor is present in a ratio of weight from about 1: 2 to about 2: 1 compared with carboxymethyl cellulose.

Briefly, the process for the manufacture of coils of sponge paper, strong and soft, of the present invention, comprises the following steps: a) formation of an aqueous pulp of fibers for the manufacture of paper; b) adding a composition to facilitate crepitus, which comprises: i) from about 0.02% to about 1.0% by weight, of a biodegradable binding inhibitor, this percentage being based on the dry weight of the fibers for the paper preparation; ii) from about 0.02% to about 0.5% by weight, of a water soluble carboxymethyl cellulose, based on this percentage, on the dry weight of the papermaking fibers; and iii) from about 0.05% to about 3.0% by weight, of a cationic starch, based on this percentage, on the dry weight of the papermaking fibers. wherein said biodegradable binding inhibitor is present in a ratio relative to carboxymethyl cellulose of from about 1: 5 to about 5: 1; c) the deposition of fibers for the manufacture of paper on a foraminous surface, so that the excess water used to form the dispersion is extracted, forming an embryonic coil; d) the transfer of the embryo coil, to a surface of a conveyor, on which the extraction of the water continues, forming a semi-dry coil, said surface of the conveyor being selected from the group consisting of felts and forming materials for manufacturing the paper; e) transferring the semi-dry coil to the surface of a Yankee dryer, over which the drying continues until the coil reaches a substantially dry condition; f) removing the dry coil from the Yankee dryer by means of a creping blade; and g) winding the fluff paper spool on a spool.

It has been found that the constituents of the compound for facilitating crepitation are optimally added to the pulp for papermaking, separated, while in the form of a diluted suspension before the fibers are deposited. It has also been found that the operation of the composition to facilitate crepitus is optimal, if the chemical binding inhibitor is added before the cationic starch. All percentages, ratios and proportions in the present description are by weight, unless otherwise specified.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of the representation illustrating a preferred embodiment of the papermaking process of the present invention, for producing a fluffy, strong and soft toilet paper, through the use of a composition for facilitate crepitus Figure 2 is a schematic representation illustrating a preferred embodiment of the steps of the process for incorporating the composition to facilitate crepitus. The present invention is described in more detail below.

DETAILED DESCRIPTION OF THE INVENTION Although the present description concludes with the claims that point and claim in a distinctive manner, the subject matter considered as the invention, it is believed that the present invention can be better understood, from reading the following detailed description of the invention. the same and the examples that accompany it. As used in the present description, the term "comprising" means that the different components, ingredients or steps, may be employed together, in the practice of the present invention. Thus, the term "comprising" encompasses the more restrictive terms "consisting essentially of" and "consistent of". As used in the present description, the term "creping facilitating compounds" refers to one or more components that are added to the composition for papermaking, while said composition is in the form of a dilute paste or subsequently, to the embryo coil to benefit the crepitation process or the resulting product, altering the adhesion to the Yankee dryer, altering the stable percentage (%) of crepitation in the process, or improving the smoothness of the resulting product. As used in the present description, the term "water soluble" refers to materials that are soluble in water, at least 3% at a temperature of 25 ° C. As used in the present description, the terms "toilet paper roll, paper roll, roll, sheet of paper and paper product" all refer to paper sheets manufactured by means of a process, which comprises the steps of the formation of an aqueous composition for the manufacture of the paper, the deposition of this composition on a foraminous surface, such as a Fourdrinier strip, and the removal of water from the composition, either by gravity or by vacuum-assisted drainage, with or without pressing, and by evaporation, comprising final steps of the adhesion of the sheet in a semi-dry condition to the surface of a Yankee dryer, finish the extraction of the water by evaporation until an essentially dry condition is obtained, the removal of the coil from the dryer Y ankee, by means of a flexible creping blade, and winding the resulting sheet in a coil. As used in the present description, an "aqueous papermaking composition" is an aqueous pulp of papermaking fibers that optionally includes chemical modifiers, as will be described below. As used in the present description, the terms "multi-layer toilet paper roll, multi-layer paper roll, multi-layer roll, multi-layer paper sheet and multilayer paper product" are all used interchangeable way in art, to refer to paper sheets prepared from two or more layers of the aqueous papermaking composition, which preferably comprises different fiber types, generally relatively long softwood fibers and relatively short hardwood fibers, such as those used in the manufacture of toilet paper. The layers are preferably formed by depositing separate streams of diluted fiber pulps on one or more endless foraminous surfaces. If individual layers are originally formed on separate foraminous surfaces, the layers can subsequently be combined, when wet, to form a multi-layer toilet paper roll. As used in the present description, the term "multi-layer paper product" means that it comprises more than one layer of foamed paper. The layers of a multiple layer can be substantially homogeneous in nature or can be toilet paper rolls made with multiple layers. As used in the present description, the term"Percentage (%) of crepitation" is defined as the difference in speed between the Yankee dryer and the reel for the winding, as a percentage of the speed of the Yankee dryer in a foamed papermaking process. In other words, the crepitation percentage is the net percentage, by which the trip of the coil is foreshortened, in relation to its length, while it is on the Yankee dryer. As used in the present invention the term "impact angle" refers to the angle formed between the surface of the creping blade and the tangent of the Yankee dryer at the point of contact with the creping blade. In practice, the paper manufacturer wants to minimize the angle of impact, but is constrained by the tendency of the coil to try to move as the creping blade passes. This tendency often causes the coil to break and is sometimes referred to as the "tamponade" in the scalpel. As used in the present description, the term "link inhibitor" is an additive, which acts to delay the natural fiber to fiber link, which takes place in the paper making coil, as it is dried in the papermaking process. The first step in the process of the present invention is the formation of an aqueous fiber composition for the manufacture of paper (to which we will sometimes refer hereinafter as the "wood pulp"). It is anticipated that wood pulp in all its variety will normally comprise the papermaking fibers used in the present invention. However, other fibrous cellulose pulps can be used, such as cotton yarn, bagasse, rayon, etc. , and none is discarded. Wood pulps useful in the present invention include chemical pulps such as sulphite and sulfate pulps (sometimes referred to as Kraft), as well as mechanical pulps, including for example, milled wood, Mechanical Thermo Pulp (TMP) and Chemical Pulp-Mechanical Thermos (CTMP). Derivative pulps can be used, both decaying trees, and coniferous. Both hardwood pulp and soft wood pulp, as well as mixtures of the two, as papermaking fibers, for the toilet paper of the present invention can be used. The term "hardwood pulps", as used in the present description, refers to fibrous pulps derived from the wood substance of decaying trees (angiosperms), while "soft wood pulps" are fibrous pulps derived from the wood substance of the coniferous trees (gymnosperms). Mixtures of Kraft hardwood pulps, especially eucalyptus, and softwood pulps from North Kraft (NSK) are particularly suitable for manufacturing the toilet paper rolls of the present invention. Also included in the present invention are layered toilet paper rolls, where, more preferably, hardwood pulps, such as eucalyptus, are used in the outer layer (s), while the softwood pulps of the north Kraft are used for the inner layer (s). Also applicable to the present invention are fibers derived from recycled paper, which may contain any or all of the fiber categories mentioned above.

Composition to Facilitate Crepitation An essential component of the present invention is the biodegradable composition for facilitating crepitus. The composition for facilitating crepitation comprises a biodegradable binding inhibitor, carboxymethyl cellulose and cationic starch. Preferably, the binding inhibitor is a biodegradable quaternary ammonium compound and is present in a weight ratio of from about 1: 5 to about 5: 1 relative to carboxymethyl cellulose. More preferably, the binding inhibitor is a biodegradable quaternary ammonium compound and is present in the weight ratio of from about 1: 2 to about 2: 1 relative to carboxymethyl cellulose.

A. Biodegradable Link Inhibitor The biodegradable composition for facilitating crepitation contains as an essential component a biodegradable binding inhibitor. The binding inhibitor is present in an amount of from about 0.02% to about 1.0%,. based on the dry weight of the fibers for the papermaking of the composition and more preferably from 0. 1% up to 0.5%. Preferred are the biodegradable quaternary ammonium compounds, more preferably the biodegradable quaternary ammonium compounds having the formula: R2 (CH2) n • Y - R3 N + X "R2 (CH2) n - Y - R3 R2 (CH2) p - Y - R3 \ / N + / \ R2 Ri R3 - C - O - CH2 \ / R3 • C • O II O wherein each substituent R2 is an alkyl or hydroxyalkyl group of C 1 to C 6, benzyl group or mixtures thereof; Each substituent Ri is a C 12 to C 22 hydrocarbyl group, or a substituted hydrocarbyl group or mixtures thereof; each substituent R 3 is a hydrocarbyl group of C 1 to C 23, or a substituted hydrocarbyl group or mixtures thereof; Y is -O-C (O) - or C (O) -O- or -NH-C (O) -O-C (O) -NH-, and mixtures thereof; n is from 1 to 4 and X- is a suitable anion, for example, chloride, bromide, methyl sulfate, ethyl sulfate, nitrate and the like. As explained by Ed Swern in Bailey's Industrial Oil and Fat Products, Third Edition, John Wiley and Sons (New York 1964) sebum is a naturally occurring material that has a variable composition. Table 6. 13 of the reference indicated above, edited by Swern, indicates that generally 78% or more of the tallow fatty acids contain 16 or 18 carbon atoms. Generally, half of the fatty acids present in sebum are unsaturated, mainly in the form of oleic acid. Synthetic "tallows", as well as natural ones, are within the scope of the present invention. It is also known that depending on the requirements of the product characteristics, the level of saturation of the design, can be designed from the non-hydrogenated tallow (soft) to the touch, to the partially, or completely hydrogenated (hard) to the touch. This means that expressly all saturation levels described above are included within the scope of the present invention. It will be understood that the substituents Ri, R2 and R3 can be optionally substituted by various groups such as alkoxy, hydroxyl, or they can be branched, but such materials are not preferred in the present invention. Preferably, each substituent Ri is a C 12 to C 18 alkyl and / or alkenyl, more preferably each Ri is straight chain C 16 to C 18 alkyl and / or alkenyl. Preferably, each substituent R2 is methyl or hydroxyethyl. Preferably, each substituent R3 is C13 to C17 alkyl and / or alkenyl, more preferably the substituent R3 is straight chain C15 to C17 alkyl and / or alkenyl, and X- is chloride or methyl sulfate. In addition, the quaternary ammonium functional ester compounds may optionally contain up to about 10% of mono (long chain alkyl) derivatives, for example, (R2) 2-N + - ((CH2) 2? H) ((CH2 ) 2? C (O) R3) X "as minor ingredients These minor ingredients can act as emulsifiers and are useful in the present invention The specific examples of functional quaternary ammonium ester compounds having the structures mentioned above and which are suitable for use in the present invention, include the well-known dialkyl dimethyl ammonium salts, such as diester dimethyl ammonium dichloride chloride, dimethyl ammonium monoester dichloride chloride, dimethyl ammonium diester dimethyl methylsulfate, ditallow (hydrogenated) dimethyl ammonium diester sulfate, chloride diester di (hydrogenated) dimethyl ammonium, and mixtures thereof Diester dimethyl ammonium chloride and diester (hydrogenated) dimethyl chloride ammonium, are those that are particularly preferred. These particular materials are marketed by Sherex Chemical Company, Inc. of Dublin, Ohio under the trade name "ADOGEN DDMC ™". Variations of biodegradable quaternary ammonium compounds based on vegetable oil can also be used, and this means that they are within the scope of the present invention. These compounds have the same formulas as described above, wherein the substituent R3 comprises a hydrocarbyl group of Cu to C23, or a substituted hydrocarbyl group, derived from vegetable oil sources. Preferably, most of the substituent R3 comprises fatty acyl containing at least 90% C to C24 long chain. More preferably, most of the substituents R3 are selected from the group consisting of fatty acyl containing at least 90% Cie to C22, and mixtures thereof. Specific examples of the variations of biodegradable quaternary ammonium compound based on vegetable oil, suitable for use in the present invention, include the compounds having the formulas: (CH3) 2 -N * - (CH2CH2-O-C-C17H33) 2 OR II (CH3) 2"N + - (CH2CH2 - O - C - C21M4U2 X- These compounds can be considered to be the mono and diester variations of the diester di (oleyl) dimethyl ammonium chloride (DEDODMAC) (e.g., di (octadec) chloride). -z-9-eneoyloxyethyl) dimethyl ammonium) and di (erucyl) dimethyl ammonium diester chloride (DEDEDMAC) (for example, di (docos-z-13-eneoyloxyethyl) dimethyl ammonium chloride), respectively. oleyl and erucyl, from fatty acyl groups, are derived from vegetable oils, which occur naturally (for example, olive oil, grapeseed oil, etc.), smaller amounts of other groups may also be present Fatty Acyl Di-quaternary variations of the biodegradable quaternary ammonium compound can also be used, and this means that they are within the scope of the present invention.These compounds have the formula: O (R2) 2 (R2) 2 O II I i II R3 - C - O - (CH2) 2 • N + - (CH2) n- N + - (CH2) 2 - O - C - R3 X * In the structure mentioned above, each substituent R2 is an alkyl or hydroxyalkyl group of C 1 -C 6, the substituent R 3 is a hydrocarbyl group of C 11 -C 23, n is from 1 to 4 and X- is a suitable anion, such as a halide (for example, chloride or bromide) or methyl sulfate. Preferably, each R3 substituent is C13-C17 alkyl and / or alkenyl, even more preferably, each R3 substituent is straight chain C15 to C17 alkyl and / or alkenyl, and the R2 substituent is methyl.

B. Carboxymethyl Cellulose The biodegradable creping promoter contains carboxymethyl cellulose as an essential component. The present invention contains from about 0. 01% to about 1.0% and more preferably from about 0.02% to about 0.5% carboxymethyl cellulose. The term "carboxymethyl cellulose", as used in the present disclosure, refers to carboxymethyl cellulose (CMC) or its additionally substituted derivatives, such as carboxymethyl methyl cellulose (CMMC), carboxymethyl hydroxyethyl cellulose (CMHEC), and carboxymethyl hydroxypropyl cellulose (CMHPC). If additional substituents are used, it is preferable that these be methyl or hydroxyalkyl groups, preferably containing the latter functionality of 2 to 3 carbon atoms. The carboxymethyl cellulose useful in the present invention is soluble in water and has a degree of substitution up to the theoretical limit of 3.0, but is preferable in the range of from about 0.3 to about 1.4 carboxymethyl substituents per cellulose anhydroglucose unit. The molecular weight of the carboxymethyl cellulose useful for the present invention may be in the range of from about 10,000 to about 1,000,000, but preferably in the range of from about 90,000 to about 700,000.

Suitable carboxymethyl cellulose can be purchased from Hercules Incorporated of Wilmington, Delaware. The Hercules CMC-7MT® is of an adequate grade. Before adding the carboxymethyl cellulose to the papermaking composition used to manufacture the toilet paper rolls, according to the present invention, it is preferable to create an aqueous solution of carboxymethyl cellulose, preferably in the range of from about 0. 1% to approximately 5.0% CMC.

C. Cationic Starch The biodegradable promoter of crepitation contains as an essential component a cationic starch. As used herein, the term "cationic starch" is defined as naturally derived starch, which has been chemically modified additionally, to impart a portion of cationic constituent. Preferably, the starch is derived from corn or potatoes, but may be derived from other sources such as rice, wheat or tapioca. Waxy corn starch, also known industrially as amioca starch, is the one that is particularly preferred. Amioca starch differs from common corn starch, in that it is completely amylopectin, whereas common corn starch contains both amylopectin and amylose. The different unique characteristics of amioca starch are further described in "Amioca, The Starch from Waxy Corn", by H. H. Schopmeyer, Food Industries, December 1945, pages 106 to 108 (vol. Pages 1476 to 1478). The starch may be in granular form, previously gelatinized granular form, or dispersed form. The dispersed form is preferred. If it is in the previously gelatinized granular form, it only needs to be dispersed in cold water before using it, the only precaution being the use of equipment that overcomes any tendency to block the gel in the formation of the dispersion. Suitable dispersants known as eductors are common in the industry. If the starch is in the granular form and has not been previously gelatinized, it is necessary to cook the starch to induce the inflammation of the granules. Preferably, said starch granules are ignited, by cooking, to a point just prior to the dispersion of the starch granule. To these highly inflamed starch granules we will refer to them as being "fully cooked". The conditions for dispersion in general may vary depending on the size of the starch granules, the degree of crystallinity of the granules and the amount of amylose present. Fully cooked amioca starch, for example, can be prepared by heating an aqueous paste of a consistency of the starch granules, of about 4% at a temperature of about 190 ° F (about 88 ° C), for a period of time between about 30 and about 40 minutes. The cationic starches can be divided into the following general classifications: (1) tertiary aminoalkyl ethers, (2) onium starch ethers, including quaternary amine, phosphonium and sulfonium derivatives, (3) primary and secondary aminoalkyl starches, and (4) miscellaneous (for example, imino starches). New cationic products continue to develop, but the tertiary aminoalkyl ethers and the quaternary ammonium alkyl ethers are the main commercial types. Preferably, the cationic starch has a degree of substitution in the range of from about 0.01 to about 0. 1 cationic substituent per anhydroglucose unit of starch; Substituents being preferably selected from the aforementioned types. Suitable starches are produced by National Starch and Chemical Company, (Bridgewater, New Jersey) under the trade name RediBOND 5327®. Only grades with cationic portions, such as RediBOND 5320® and RediBOND 5327®, are suitable, and grades with additional anionic functionality, such as RediBOND 2005®, are also suitable. The present invention is applicable to foamed toilet paper in general, including, but not limited to conventionally compressed foamed toilet paper, densified foamed toilet paper with high volume pattern; and high-volume, non-compacted, sponge-free toilet paper. The foamed toilet paper rolls for the present invention have a basis weight of between 10 g / m2 and approximately 65 g / m2, and a density of approximately 0.60 g / m3 or less. Preferably, the base weight will be less than about 35 g / m2 or less; and the density will be about 0.30 g / m3 or less. More preferably, the density will be between 0.04 g / m3 and 0.30 g / m3.

The present invention is also applicable to multi-layer toilet paper rolls. Toilet paper structures formed from layered paper rolls are described in US Patent No. 3,994,771 issued to Morgan, Jr., and associates, issued November 30, 1976; U.S. Patent No. 4,300,981, issued to Carstens, issued November 17, 1981; U.S. Patent No. 4, 166,001, issued to Dunning and associates, issued August 28, 1979 and European Patent Publication No. 0 613 979 A l, issued to Edwards and associates, published September 7, 1994, all incorporated herein by reference. The layers preferably comprise different types of fibers, the fibers generally being relatively long softwood fibers and relatively short hardwood fibers, such as those used in the manufacture of multilayer toilet paper. The multilayer toilet paper rolls suitable for the present invention comprise, at least two superimposed layers, an inner layer and at least one outer layer contiguous with the inner layer. Preferably, the multilayer toilet papers comprise three superimposed layers, an inner layer or central layer and two outer layers, the inner layer being placed between two outer layers. The two outer layers preferably comprise a major filament constituent of about 50% or greater, by weight of relatively short papermaking fibers having an average fiber length of between about 0.2 and about 1.5 mm. These short fibers for papermaking are generally hardwood fibers, preferably hardwood Kraft fibers, and even more preferably, derived from eucalyptus. The inner layer preferably comprises a major filament constituent of about 60% or greater, by weight of papermaking fibers having an average fiber length of at least about 2.0 mm. These fibers for long papermaking are generally soft wood fibers, preferably softwood fibers from the north Kraft. Preferably, most of the crepe-forming biodegradable composition of the present invention is incorporated in at least one of the outer layers of the multilayer toilet paper roll of the present invention. More preferably, most of the biodegradable composition for facilitating creping of the present invention is incorporated in both outer layers. The foamed toilet paper products made from single layer or multi-layer foamed toilet rolls may have a single layer or multiple layer construction. The process for the manufacture of coils of sponge paper, strong and soft, of the present invention, comprises the following steps: a) formation of an aqueous pulp of fibers for the manufacture of paper; b) adding a composition to facilitate crepitus, which comprises: i) from about 0.02% to about 1.0% by weight, of a biodegradable binding inhibitor, this percentage being based on the dry weight of the fibers for the paper preparation; ii) from approximately 0.02% to approximately 0. 5% by weight, of a water soluble carboxymethyl cellulose, based on this percentage, on the dry weight of the papermaking fibers; and iii) from about 0.05% to about 3.0% by weight, of a cationic starch, based on this percentage, on the dry weight of the papermaking fibers. wherein said biodegradable binding inhibitor is present in a ratio relative to carboxymethyl cellulose of from about 1: 5 to about 5: 1.; c) the deposition of fibers for the manufacture of paper on a foraminous surface, so that the excess water used to form the dispersion is extracted, forming an embryonic coil; d) the transfer of the embryo coil, to a surface of a conveyor, on which the extraction of the water continues, forming a semi-dry coil, said surface of the conveyor being selected from the group consisting of felts and forming materials for manufacturing the paper; e) transferring the semi-dry coil to the surface of a Yankee dryer, over which the drying continues until the coil reaches a substantially dry condition; f) removing the dry coil from the Yankee dryer by means of a creping blade; and g) winding the fluff paper spool on a spool.

In the process step of the present invention comprising the deposition of fibers for the manufacture of paper on a foraminous surface, the equipment and methods are well known to those skilled in the art. In a typical process, a composition for the manufacture of low consistency pulp paper, the machine has a pressurized main container. The main container has an opening for supplying a thin deposit of pulp composition on a Fourdrinier strip to form a wet coil. Generally, the water is extracted to the coil until a fiber consistency of between about 7% and about 25% (based on the total weight of the coil) is obtained by means of vacuum extraction. In the step of the process of the present invention comprising the addition of the composition to facilitate crepitus; the biodegradable binding inhibitor, the carboxymethyl cellulose and the cationic starch, are prepared to form an aqueous solution, diluted to a desired concentration, which is added to the aqueous pulp of papermaking fibers, or composition for the manufacture of the paper, at the wet end of the papermaking machine, at a suitable point beyond the Fourdrinier strip or in the sheet forming step. However, applications of the biodegradable composition to facilitate creping, subsequent to the formation of the wet paper coil and prior to the drying step of the coil to finish it, also provide significant benefits and are expressly included within the scope of this invention. More preferably, the binding inhibitor, the carboxymethyl cellulose and the cationic starch, are formed in separate aqueous dispersions and are added, also separately, to the aqueous dispersion of the fibers for papermaking at a suitable point, below in the sheet forming step, and the aqueous dispersion of the binding inhibitor, is added to the aqueous dispersion of papermaking fibers, before the cationic starch. Even more preferably, the constituents of said composition for facilitating crepitation are added separately, as aqueous dispersions, to said aqueous pulp of fibers for the manufacture of the paper before depositing the fibers on said foraminous surface, the carboxymethyl cellulose is added to the aqueous paste before the quaternary ammonium bond inhibitor, and the quaternary ammonium compound is added before the cationic starch. In the process step of the present invention, which comprises depositing the fibers for the manufacture of the paper on a foraminous surface to form an embryonic coil, the scope of the present invention also includes the formation of multiple layers of paper, in wherein two or more layers of the papermaking composition are preferably formed from the deposition of separate streams of dilute fiber pastes. The layers preferably comprise different types of fibers, generally being relatively long softwood fibers, and relatively short hardwood fibers as used in the manufacture of multilayer toilet paper. If the individual layers are initially formed in separate bands, the layers are subsequently combined when wet to form a multi-layer toilet paper roll. The fibers for papermaking preferably comprise different types of fibers, the fibers being generally relatively long softwood and relatively short hardwood fibers. More preferably, the hardwood fibers comprise at least about 50% and said soft wood fibers comprise at least about 10% of said fibers for papermaking. In the process step of the present invention comprising the transfer of the coil to a felt or forming material, the step of conventionally compressing the toilet paper with a felt is well known in the art, and is expressly included within the scope of the invention. scope of the present invention. In this step of the process, the water is extracted from the coil, transferring it to a water extraction felt and compressing the coil, so that the water is removed from it and absorbed, by the felt by means of pressing operations in where the coil is subjected to the pressure developed by opposed mechanical members, for example, cylindrical rollers. Due to the substantial pressures required to extract the water from the coil in this mode, the resulting coils manufactured by the conventional pressing of the felt are of a relatively high density and are characterized by having a uniform density throughout the structure of the coil. In the process step of the present invention comprising the transfer of the semi-dry coil to the Yankee dryer, the coil is compressed during transfer to the cylindrical steam drum apparatus known in the art as a Yankee dryer. The transfer is effected by mechanical means, such as an opposite pressure of the cylindrical drum against the coil. Vacuum can also be applied to the coil, as it is being compressed against the surface of the Yankee dryer. Multiple Yankee drums can be used. The most preferred variations to the steps of the process include the so-called densified pattern methods, in which the resulting structure is characterized by having a relatively high volume field, a relatively low fiber density and an array of densified zones of relatively high fiber density. The high volume field is alternatively characterized as a field of pillow regions. We refer to the densified zones alternatively as regions of knots. The densified zones may be spaced apart within the high volume field and may be connected to each other, either completely or partially, within the high volume field. Preferred processes for making rolls of toilet paper with densified pattern are described in U.S. Patent No. 3,301,746, issued to Sanford and Sisson, issued on January 31, 1967; U.S. Patent No. 3,974,025 issued to Peter G. Ayers, issued August 10, 1976; U.S. Patent No. 4, 191, 609 issued to Paul D. Trokhan, issued March 4, 1980; U.S. Patent No. 4,637,859 issued to Paul D. Trokhan, issued on January 20, 1987; U.S. Patent No. 4, 942, 077 issued to Wendt et al., Issued July 17, 1990; European Patent Publication No. 0 617 164 A 1, issued to Hyland and associates, published on September 28, 1994 and European Patent Publication No. 0 616 074 A 1, issued to Hermans and associates, published on June 21, 1994. September 1994; all of which are incorporated in the present description for reference. To form the coils with densified pattern, the transfer step of the coil, immediately after forming the coil, is to a forming material instead of a felt. The coil is juxtaposed against an array of supports comprising the forming material. The coil is compressed against ex. arrangement of supports, resulting in the densified areas of the coil in locations that correspond geographically to the points of contact between the arrangement of supports and the wet coil. The rest of the coil not compressed during this operation, we refer to as the high volume field. This high volume field can be further dedensified by the application of fluid pressure, such as with a vacuum type apparatus or a blow dryer. The coil is extracted from the water, and is previously optionally dried, in such a way that the compression of the high volume field is substantially avoided. This is preferably done by fluid pressure, such as with a vacuum type apparatus or a blow dryer, or alternatively, by mechanical pressure of the coil against an array of supports where the high volume field is not compressed. The operations of water extraction, optional pre-drying and formation of the densified zones can be integrated or partially integrated, to reduce the total number of steps of the process carried out. The moisture content of the semi-dry coil at the point of transfer to the surface of the Yankee dryer is less than about 40% and the hot air is forced through said semi-dry coil while the semi-coil is forced. dry is on said forming material to form a low density structure. The coil with densified pattern is transferred to the Yankee dryer and dried to completion, preferably still avoiding mechanical pressure. In the present invention, preferably from about 8% to about 55% of the surface of foamed toilet paper comprises densified knots having a relative density of at least 125% of the density of the high volume field. The arrangement of supports is preferably a conveyor printing material that has a displacement of knot patterns, which operates as the arrangement of supports, which facilitates the formation of densified areas in the application of pressure. The knot pattern constitutes the array of supports we referred to earlier. Conveyor printing materials are described in U.S. Patent No. 3,301,746, issued to Sanford and Sisson, issued January 31, 1967; U.S. Patent No. 3, 82 1, 068, issued to Salvucci, Jr., and associates, issued May 21, 1974; U.S. Patent No. 3,974,025, issued to Ayers, issued August 10, 1976; U.S. Patent No. 3,573,164, issued to Friedberg and associates, issued March 30, 1971; U.S. Patent No. 3,473,576 issued to Amneus, issued October 21, 1969; U.S. Patent No. 4,239,065, issued to Trokhan, issued December 16, 1980; and U.S. Patent No. 4, 528,239, issued to Trokhan, issued July 9, 1985, all incorporated herein by reference. Even more preferably, the embryo coil is made to conform to the surface of an open mesh dryer / printing material, by the application of a fluid force to the coil and then pre-dried with heat on said material, as part of a process of manufacture of low density paper. Another variation of the steps of the process included within the present invention includes the formation of so-called multi-layer, densified, non-compacted, multiple-layer paper structures, such as those described in U.S. Patent No. 3,812,000, issued to Joseph L. Salvucci, Jr. and Peter N. Yiannos, issued May 21, 1974 and United States Patent No. 4,208,459, issued to Henry E. Becker, Albert L. McConnell and Richard Schutte, issued June 17, 1980, both of which are incorporated herein by reference. In general, multilayer, non-compacted, multi-layer toilet paper structures are prepared by depositing the papermaking composition on a foraminous forming web, such as a Fourdrinier strip, to form a wet coil, extracting the water from the coil and remove the additional water without mechanical compression, until the coil has a fiber consistency of at least 80%, and performing crepitation of the coil. The water is extracted from the coil by vacuum extraction and thermal drying. The resulting structure is a soft, but weak high volume sheet of relatively uncompacted fibers. The bonding material is preferably applied to the portions of the coil before creping. In the step of the process of the present invention comprising the step of removing the essentially dry coil from the Yankee dryer by means of a creping blade, it is preferable to minimize the impact angle formed by the creping blade. Said configurations desirably increase the tension in the coil as it is conducted out of the Yankee dryer. It is believed that the composition for facilitating creping of the present invention offers the potential to reduce the angle of impact, without observing the expected increase, in the frequency of breaks of the coil, due to the tamponade of the scalpel. Figure 1 is a schematic view of the representation illustrating the preferred embodiments of the papermaking process of the present invention for producing strong, soft, foamed toilet paper through the use of a composition to facilitate crepitus. These preferred embodiments are described in the following explanation, where reference is made to Figure 1. Figure 1 is a side elevational view of a preferred machine for making paper 80 for making paper in accordance with the present invention. Referring to Figure 1, the papermaking machine 80 comprises a layered main container 8, which has an upper chamber 82 and a central chamber 82.5 and a bottom chamber 83, and a sunroof 84, and a Fourdrinier web 85, which is bonded on and around a step roller 86, a diverter 80, vacuum suction boxes 91, a support roller 92, and a plurality of rotating rollers 94. During operation, a composition for the papermaking is pumped through the central chamber 82, a second papermaking composition is pumped through the central chamber 82.5, while a third papermaking composition is pumped through the bottom chamber 83 and thence out of the sliding roof 84 in an up and down relation on the Fourdrinier band 85, to form therein an embryonic coil 88 comprising the layers 88a, 88b and 88c. The extraction of the water is carried out through the Fourdrinier band 85 and is assisted by the diverter 90 and the vacuum boxes 9 1. As the Fourdrinier band travels back in the direction shown by the arrow, the showers 95 they clean it before starting another course on the stepped roller 86. In the transfer zone of the coil 93, the embryonic coil 88 is transferred to a foraminous conveyor material 96 by means of the action of the vacuum transfer case 97. The conveyor material 96, transports the coil from the transfer zone 93 to pass the vacuum water extraction box 98, through air blower pre-dryers 100 and after two rotating rollers 10 1 after which, the coil it is transferred to a Yankee dryer 108 by the action of a pressure roller 1 02. The conveyor material 96 is subsequently cleaned and the water is extracted as it completes its rotation passing over e and around the additional rotating rollers 101, the sprinklers 103, and the vacuum water extraction box 105. - The pre-dried paper reel is adhesively secured to the cylindrical surface of the Yankee dryer 108, assisted by the application of adhesive by means of a spray applicator. 109. The drying is terminated on the steam-heated Yankee dryer 108 by hot air means, which are heated and circulated through the dryer hood 10 by means not shown. The coil is also dry crackled from the Yankee dryer 108 by the knife 1 1, after which, the paper sheet 70 is designated to comprise a side layer 7 1, a core layer 73 and an outer side layer 75 of the dryer Yankee The sheet of paper 70 then passes between the calendar rollers 1 1 2 and 1 13, around the circumference portion of the reel 1 1 5, and is then wound on a roller 1 16 on a core 1 17 placed on a bar 1 18. Still referring to Figure 1, the creation of the side layer of the Yankee dryer 71 of the paper sheet 70, is the composition pumped through the bottom chamber 83 of the main container of the machine 81, and composition is applied directly to a Fourdrinier band 85 where it becomes the layer 88c of the embryonic coil 88. The creation of the central layer 73 of the paper sheet 70 is the composition for the paper manufacture supplied through the chamber 82.5 of the main container of the machine 81 and whose composition forms the layer 88b on top of the layer 88c. The creation of the outer side layer of the Yankee dryer 75 of the paper sheet, is the papermaking composition supplied through the upper chamber 82 of the main container of the machine 81, and whose composition forms the layer 88a in the upper part of the layer 88b of the embroidery coil 88. Although Figure 1 shows a papermaking machine 80 having a main container 81, adapted to manufacture three layer paper, the main container of the machine 81 can be adapted , alternatively, to manufacture coils without layers, two layers or other multiple layers. Further. , with respect to the manufacture of the paper sheet, incorporating the present invention, in the papermaking machine 80, Figure 1, the Fourdrinier band 85 must be of a fine mesh having relatively small spaces with respect to the lengths average of the fibers constituting the short fiber composition, so that good formation is achieved, and the foraminous carrier material 96 must have a fine mesh having relatively small opening spaces, with respect to the average lengths of the fibers that they constitute the long fiber composition to substantially obviate the volume formation of the embryonic coil material side, in the spaces between the filaments of the material 96. Also, with respect to the process conditions for manufacturing a sheet of paper 70 of For example, the paper roll is preferably dried to a fiber consistency of about 80%, and more preferably a A 95% fiber consistency prior to crepitation. Figure 2 is a schematic representation illustrating a preferred embodiment of the step of incorporating the composition to facilitate creping of the present invention, the following explanation, with reference to Figure 2, describes this preferred embodiment. A storage container 1 is provided for incorporating in certain steps, the aqueous pulp of relatively long papermaking fibers. The pulp is transported by means of a pump 2 and optionally, through a refiner 2 to fully develop the strength potential of the long fibers for papermaking. The additive tube 4 transports a resin to provide a wet or dry resistance, as desired in the finished product. The paste is further conditioned afterwards, in the mixture 5 to aid in the absorption of the resin. The suitably conditioned paste is subsequently diluted with white water 7 in a fan pump 6 to form a dilute paste of long fibers for papermaking. Still referring to Figure 2, the storage container 8 is a reservoir for a short fiber pulp for paper manufacture. The additive tube 8 carries a carboxymethyl cellulose component of the composition to facilitate crepitus. The pump 10 acts to transport the pulp of short fibers for the manufacture of paper, as well as to supply the dispersion of the carboxymethyl cellulose. The additive tube 1 1 carries a binding inhibitory component of the composition to facilitate crepitus. The paste is further conditioned in a mixer 12 to aid in the absorption of the additives. The additive tube 13 carries a cationic starch component of the composition to facilitate crepitus. The suitably conditioned paste is diluted with white water 7 in the suction of a fan pump 14 to produce a dilute pulp of short fibers for papermaking. Preferably, the short fiber pulp for papermaking 16 of Figure 2 is directed to the preferred process for papermaking, illustrated in Figure 1 and is divided into two approximately equal streams, which are then directed into the main vessel chambers 82 and 83, finally developing into the outer side layer of the Yankee dryer 75 and the side layer of the Yankee dryer 71, respectively, of the fluffy, strong and soft tissue. In a similar way, referring to Figure 2, the long fiber pulp for the paper 14 is preferably directed into the chamber 82.5 of the main container of the machine, finally developing into the central layer 73 of the toilet paper Fluffy, strong and soft. The advantages that are realized through the practice of the present invention, include: a) The percentage of crepitation can be reduced without producing the usual difficulties of operation or the degradation of the softness of the coil, which would exist without the characteristics of the present invention. b) The benefits are obtained without the consequences of loss of coil strength or adhesion to the Yankee Dryer. Without wishing to be bound by theory, or otherwise to limit the present invention, the following explanation is offered for the purpose of emphasizing how the addition of the composition works to facilitate crepitus to allow these benefits. It is believed that the binding inhibitor prevents the formation of relatively rigid hydrogen bonds. The ionic character of carboxymethyl cellulose and cationic starch reconstructs the bond in an alternative way, an arrangement of higher energy, but less frequent bonds. The result is a coil with a lower stiffness as a function of its final strength. As a result, when the paper manufacturer tries to apply tension to the bobbin to transport it to the bobbin winder roller, the roller must operate a higher speed winding, to induce a certain voltage in the bobbin. The result of a lower percentage (%) of crepitation, without the usual operating disadvantages that would occur with said movement.

Other Additives Other materials can be added to the composition for the paper or embryo coil, in order to impart other characteristics to the product or improve the process, provided that these materials do not affect significantly and adversely to the smoothness and improved crepitation efficiency aspects of the present invention. The following materials are expressly included, but their inclusion does not mean that all of them must be included. Other materials may also be included, provided they do not interfere or are counterproductive to obtain the advantages of the present invention. If a permanent wet strength is desired, the group of chemicals that can be added to the papermaking composition or the embryonic coil include: polyamide-epichlorohydrin, polyacrylamides, styrene-butadiene latexes; insolubilized polyvinyl alcohol; urea-formaldehyde; polyethyleneimine; chitosan polymers and mixtures thereof. The polyamide-epichlorohydrin resins are cationic wet strength resins, which have been found to be of particular utility. Suitable types of such resins are described in U.S. Patent No. 3,700,623, issued October 24, 1972 and U.S. Patent No. 3,772,076, issued November 13, 1973, both issued to Keim, and both incorporated herein by reference. A commercial source for polyamide-epichlorohydrin resins is Hercules, Inc., of Wilmington, Delaware, which markets these resins under the Kymeme ™ 557H brand. The papermaking retention aids are used to increase the retention of the fine solids of the composition in the reel during the papermaking process. Without adequate retention of fine solids, these are lost to the process flow or accumulate in excessively high concentrations in the white water ring that is continuously circulating and cause production difficulties, which include deposit buildup and uneven drainage . The use of said resins in combination with the composition to facilitate creping is expressly included within the scope of the present invention. A commercial source for polyacrylamide resin retention aids is Hercules, Inc. of Wilmington, Delaware, which markets that resin under the Reten ™ 1232 brand. Many foam products must have limited strength when wet, due to the need to dispose of them through toilets, in septic systems or sewage systems. If the wet strength is imparted to these products, it is preferable that it be a fugitive wet resistance, characterized by a decrease in part of, or all of its power, by remaining in the presence of water. If fugitive wet strength is desired, the bonding materials can be selected from the group consisting of dialdehyde starch and other aldehyde-functional resins, such as Co-Bond 1000®, offered by National Starch and Chemical Company, the Parez 750® offered by Cytec of Stamford, CT and the resin described in U.S. Patent No. 4,981, 557, issued to Bjorkquist, issued January 1, 1991, which is incorporated herein by reference. If increased absorbency is needed, surfactants can be used to treat the foamed tissue rolls of the present invention. The level of surfactant, if used, is preferably present, in amounts of from about 0.01% to about 2.0% by weight, based on the weight of the dried fiber of the toilet paper. The surfactants preferably have alkyl chains with eight or more carbon atoms. Examples of the anionic surfactants include linear alkyl sulfonates and alkylbenzene sulphonates. Examples of nonionic surfactants include alkyl glycosides including alkyl glycoside esters, such as Crodesta SL-40, which is marketed by Croda, Inc. (New York, NY); the alkyl glycoside ethers described in U.S. Patent No. 4,01,1389, issued to W. K. Langdon et al., issued March 8, 1977; and the alkyl polyethoxylated esters, such as the Pegosperse 200 ML, marketed by Glyco Chemicals, Inc., (Greenwich, CT) and the IGEPAL RC-520 marketed by Rhone Poulenc Corporation (Cranbury, N.J.). The present invention can also be used in conjunction with adhesives and coatings designed to be sprayed onto the surface of the coil or over the Yankee dryer, said products being designed to control adhesion to the Yankee dryer. For example, US Patent No. 3,926,716, issued to Bates, incorporated herein by reference, discloses a process using an aqueous dispersion of polyvinyl alcohol of some degree of hydrolysis and viscosity to improve adhesion of paper coils. to the Yankee dryers. Such polyvinyl alcohols, marketed under the trade name Airvol® by Air Products and Chemicals, Inc., of Allentown, PA, may be used in conjunction with the present invention. Other coatings for the Yankee dryer, similarly recommended, for use directly on the Yankee dryer or on the surface of the sheet, are cationic polyamide or polyamine resins, such as those manufactured under the tradename Rezosol® and Unisoft® by Houghton International of Valley Forge, PA and the Crepetrol® trademark of Hercules, Inc. of Wilmington, Delaware. These can also be used with the present invention. Although we do not wish to compromise on the theory, it is believed that the sprayed adhesive products act primarily as coil adhesion modifiers, while the creping composition of the present invention acts as a cohesion modifier; therefore, the use of a suitable adhesive for the Yankee dryer will often complement, rather than compete, with the operation of the internal composition to facilitate crepitus, described herein. Preferably, the coil is secured to the Yankee dryer by means of an adhesive selected from the group consisting of partially hydrolyzed polyvinyl alcohol resins, polyamide resin, polyamine resin, mineral oil, and mixtures thereof. More preferably, the adhesive is selected from the group consisting of polyamide epichlorohydrin resin, mineral oil and mixtures thereof. It is intended that the optional chemical additives listed above be of exemplary nature only, and does not mean that they limit the scope of the present invention.

The multilayer toilet paper roll of the present invention can be used in any application where soft, absorbent, multi-layer toilet paper rolls are required. Particularly advantageous uses of the multilayer toilet paper roll of the present invention are in toilet tissue products and facial tissues.

Analytical and Test Procedures Quantitative techniques for determining the constituent of the compounds for facilitating crepitus present in the coils of the present invention are available in the applicable art, and any acceptable method can be applied.

A. Biodegradable The components applicable in the present invention are biodegradable. As used in the present description, the term "biodegradable" refers to materials, which are completely broken down by microorganisms to carbon dioxide, water, biological masr, and inorganic materials. The potential for biodegradation can be estimated by measuring the evolution of carbon dioxide and the removal of dissolved carbon organics from a medium containing the substance being tested as a source of carbon and energy. a diluted bacterial inoculum, obtained from the float of the activated homogenised sediments. See) <Larson's publication "Estimation of Biodegradation Potential Xenobiotic Organi Chemicals", in Applied and Environmen ^ t Microbiology, Volume 38 (1979), pages 1 153 to 1 161, incorporated herein by reference, which describes a suitable method for estimating biodegradation Using this method, a substance is said to be readily biodegradable, if it has an evolution of carbon dioxide greater than 70% and greater than 90% removal of dissolved carbon organics within a period of 28 days The materials of the present invention comply with said biodegradation criteria.

B. Density The density of the multilayer toilet paper, according to the term used in the present description, is the average density calculated as the base weight of that paper divided by the gauge, with the appropriate conversion units incorporated. in the same. The gauge of the multilayer toilet paper, as used in the present description, is the thickness of the paper, when it is subjected to a compression load of 95 g / in2 (15.5 g / cm2).

C. Determination of Molecular Weight The essential distinguishing characteristic of polymeric materials is their molecular size. The properties that have made it possible for polymers to be used in a variety of applications derive almost completely from their macromolecular nature. In order to fully characterize these materials, it is essential to have some means to define and determine their molecular weights and molecular weight distributions. It is more correct to use the term related to the molecular mass, instead of the molecular weight, but the latter is used more generally in the technology of polymers. It is not always practical to determine the molecular weight distributions. However, the use of chromatography techniques is becoming a more common practice. Instead. of them, it has been used to express the molecular size, in terms of the molecular weight averages.

Molecular weight averages If we consider a simple distribution of the molecular weight, which represents the weight fraction (w) of the molecules that have a relative molecular mass (Mi), it is possible to define several useful average values. The average calculated based on the number of molecules (Ni) of a particular size (Mi), gives the Average Number of Molecular Weight: S Ni Mi n = An important consequence of this definition is that the Average Number of Molecular Weight in grams contains the Avogadro Number of molecules. This definition of molecular weight is consistent with that of monodisperse molecular species, for example, molecules that have the same molecular weight. It has a greater significance, the recognition that if the number of molecules in a given mass of polydisperse polymer can be determined in the same way, then, n, can be calculated easily. This is the basis for the measurements of the relationship property. The calculation based on the fractions of weight (W) of the molecules of a given mass (Mi) leads us to the definition of the weights of the Molecular Weight Average S Wi Ni S N¡ Mi2 w = = S W¡ S Ni Mi w is a more useful means of expressing the molecular weights of the polymer than n, because it more accurately reflects properties such as the viscosity of the molten material and the mechanical properties of the polymers, and is therefore used in the present description.

D. Quantitative analysis of the biodegradable quaternary ammonium compound. For example, the level of the biodegradable quaternary ammonium compound, such as Distebo Chloride Disodium (hydrogenated) Dimethyl Ammonium (DEDHTDMAC) (eg, ADOGEN DDMC®), retained by the toilet paper, can be determined by the extraction of the solvent from the DEDHTDMAC by an organic solvent followed by an anionic / cationic titration, using Dimidio bromide as indicator.

It is important to note that these methods are exemplary, so the mention of these methods does not mean that other methods are excluded, which can be useful to determine the levels of the particular components retained by the toilet paper. The following examples illustrate the practice of the present invention, but it is not intended that said examples consider limitations thereof.

EXAMPLES The purpose of these examples is to illustrate the advantages of the present invention, in order to produce efficiently, spongy, strong and soft toilet paper. For this illustration, a pilot scale Fourdrinlier machine was used to manufacture paper, to make spongy toilet paper, either incorporating the characteristics of the present invention, or without incorporating them.

EXAMPLE 1 This example illustrates a process incorporating a preferred embodiment of the present invention using a pilot scale Fourdrinier band. An aqueous NSK slurry of approximately 3% consistency was prepared using a conventional pulp prep and passing through a supply tube said paper preparation composition to the main container of the Fourdrinier machine.

In order to impart a temporary wet strength to the finished product, a 1% dispersion of Co-BOND 1000® from National Starch was prepared and added to the supply tube of the NSK paste in a sufficient range to supply the Co-BOND 1000® at 1% based on the dry weight of the NSK fibers of the papermaking composition. The absorption of the temporary wet resistance resin is increased by passing the treated paste through a mixer installed in line. The NSK paste is diluted with white water to an approximate consistency of 0.2% in the fan pump. An aqueous paste of eucalyptus fibers of about 3% by weight was prepared using a conventional preparer to re-prepare the pulp. The eucalyptus is passed through the supply pipe where the constituents of the composition are added to facilitate crepitation. First the carboxymethyl cellulose was added. The carboxymethyl cellulose was first dissolved in water and diluted to a solution potency of 1% by weight. The CMC-7MT® from Hercules was used to prepare the Carboxymethyl Cellulose solution. The aqueous solution of CMC was added to the aqueous paste of eucalyptus fibers in a range of 0.25% CMC by weight, based on the weight of dried eucalyptus fibers. The aqueous paste of eucalyptus fibers passes through a centrifugal supply pump to aid in the distribution of the CMC. Then the composition of the binding inhibitor was added. The binding inhibitory composition is Distebo Chloride Distebo (Touch-hardened) Dimethyl Ammonium (DEDTHTDMAC). He DEDTHTDMAC previously heated (150 ° F) is first pulped, in water conditioned by pre-heating to 150 ° F and adjusting the pH to about 3.0 with sulfuric acid. The water is stirred during the addition of DEDTHTDMAC to help its dispersion. The concentration of the resulting DEDTHTDMAC dispersion is 1% by weight, and is added to the eucalyptus supply tube in a range of 0.375% by weight of DEDTHTDMAC, based on the weight of dried eucalyptus fibers. The absorption of DEDTHTDMAC in the eucalyptus is increased by passing the paste through a mixer connected in line. Then the cationic starch is added. RediBOND 5320® is used, in previously dispersed form of maize corn starch waxy. The starch dispersion is first diluted to a solids concentration of 1% and is added to the paste of eucalyptus fibers traveling in a range of 0.625% by weight of cationic starch, based on the weight of dried eucalyptus fibers. The eucalyptus paste passes to the second fan pump, where it is diluted with white water until obtaining a consistency of approximately 0.2%. The NSK and eucalyptus pastes are conducted into a main container of the machine with multiple channels suitable, equipped with means for the elaboration of layers, in order to conserve the currents as separate layers until their discharge on the Fourdrinier band in movement . A three-chambered main vessel was used. The eucalyptus paste containing 80% of the dry weight of the final paper is conveyed to the chambers leading to each of the two outer layers, while the NSK paste comprising 20% of the dry weight of the final paper, it is conducted to the chamber that leads to a layer between the two layers of eucalyptus. The NSK and eucalyptus pastes are combined in the discharge of the main container, to form a composite paste. The composite paste is discharged on the moving Fourdrinier band and the water is removed by a diverter and vacuum boxes. The wet embryonic coil is transferred from the Fourdrinier band, in a fiber consistency of approximately 15% at the transfer point, to a 5-shed pattern forming material, satin fabric configuration having 84 monofilaments in the direction of the machine and 76 monofilaments in the transverse direction of the machine per inch, respectively, and a knot area of approximately 36%. The additional extraction of the water is done by vacuum assisted by drainage, until the coil has a fiber consistency of approximately 28%. Although it remains in contact with the pattern forming material, the coil with the applied patterns is pre-dried by a blower to a fiber consistency of approximately 62% by weight. The semi-dry coil is then adhered to the surface of a Yankee dryer with a crepitation adhesive sprayed, which comprises an aqueous solution of 0.125% polyvinyl alcohol.

The crepitation adhesive is applied to the surface of the Yankee dryer in a range of 0. 1% adhesive solids based on the weight of the dry coil. The consistency of the fiber is increased to approximately 96% before the coil is cracked dry from the Yankee dryer with a scalpel. The scalpel has a bevel angle of approximately 20 degrees and is positioned with respect to the Yankee dryer to produce an impact angle of approximately 76 degrees. The crepitation percentage is adjusted to approximately 12% by operating the Yankee dryer at a rate of approximately 800 ppm (feet per minute ((approximately 244 meters per minute), while the dry coil is formed on a roller at a rate of 704 ppm. (216 meters per minute) The coil is converted into a three-layer toilet paper product, densified with a crackling single-layer pattern, with a base weight of approximately 18 pounds per 3000 ft2.

COMPARATIVE EXAMPLE 1 An aqueous NSK paste of approximately 3% consistency was prepared using a conventional pulp preparer and through a supply tube said composition for the preparation of the paper into the main container of the Fourdrinier machine. . In order to impart a temporary wet strength to the finished product, a 1% dispersion of Co-BOND 1000® from National Starch was prepared and added to the supply tube of the NSK paste in a sufficient range to supply the Co-BOND 1000® at 1% based on the weight of the dried NSK fibers of the papermaking composition. The absorption of the temporary wet resistance resin is increased by passing the treated paste through a mixer installed in line. The NSK paste is diluted with white water to an approximate consistency of 0.2% in the fan pump. An aqueous paste of eucalyptus fibers of about 3% by weight was prepared using a conventional preparer to re-prepare the pulp. The eucalyptus is passed through the supply tube where it is diluted with white water up to a fiber consistency of approximately 0.2%. The NSK and eucalyptus pastes are conducted into a main container of the machine with multiple channels suitable, equipped with means for the elaboration of layers, in order to conserve the currents as separate layers until their discharge on the Fourdrinier band in movement . A three-chambered main vessel was used. The eucalyptus paste containing 80% of the dry weight of the final paper is conveyed to the chambers leading to each of the two outer layers, while the NSK paste comprising 20% of the dry weight of the final paper, it is conducted to the chamber that leads to a layer between the two layers of eucalyptus. The NSK and eucalyptus pastes are combined in the discharge of the main container, to form a composite paste.

The composite paste is discharged on the moving Fourdrinier band and the water is removed by a diverter and vacuum boxes. The wet embryonic coil is transferred from the Fourdrinier band, at a fiber consistency of approximately 15% at the transfer point. , to a 5-shed pattern forming material, satin fabric configuration that has 84 monofilaments in the machine direction and 76 monofilaments in the machine direction per inch, respectively and a knot area of approximately 36% . The additional extraction of the water is done by vacuum assisted by drainage until the coil has a fiber consistency of approximately 28%. Although it remains in contact with the pattern forming material, the coil with the applied patterns is previously dried by a blower fan, up to a fiber consistency of approximately 62% by weight. The semi-dry coil is then adhered to the surface of a Yankee dryer with a crepitation adhesive sprayed, which comprises an aqueous solution of 0.125% polyvinyl alcohol. The crepitation adhesive is applied to the surface of the Yankee dryer in a range of 0. 1% adhesive solids, based on the weight of the dry coil. The consistency of the fiber is increased to approximately 96% before the coil is cracked dry, from the Yankee dryer with a scalpel.

The scalpel has a bevel angle of approximately 25 degrees and is positioned with respect to the Yankee dryer to produce an impact angle of approximately 81 degrees. The crepitation percentage is adjusted to approximately 18% by operating the Yankee dryer at a rate of approximately 800 ppm (feet per minute ((approximately 244 meters per minute), while the dry coil is formed on a roller at a speed of 656 ppm (201 meters per minute). The coil is converted into a three layer toilet paper product, densified with a crackled single-layer pattern, with a base weight of approximately 18 pounds per 3000 ft2.

Both Example 1 and Comparative Example 1 produce a coil voltage in an acceptable range to avoid the formation of a coil ripple, coming from the low voltage or the break resulting from the high voltage. Confirming the benefits of the product and process of Example 1 against those of Comparative Example 1, the coil of Example 1 was produced at a faster winding speed of 6% and considered to be softer by a panel of expert judges.

Claims (35)

1. R E I V I N D I C A C I O N S 1. A soft foamed toilet paper, which comprises: a) fibers for paper making; and b) a biodegradable composition, which facilitates crepitation, said composition comprising: i) from approximately 0.02% to approximately 1. 0% by weight, of a biodegradable binding inhibitor, based on this percentage, on the dry weight of the fibers for papermaking; ii) from approximately 0.02% to approximately 0. 5% by weight, of a water soluble carboxymethyl cellulose, based on this percentage, on the dry weight of the papermaking fibers; and iii) from about 0.05% to about 3.0% by weight, of a cationic starch, based on said percentage, on the dry weight of the papermaking fibers, 2. The toilet paper as described in FIG. Claim 1, further characterized in that said binding inhibitor is present in a ratio relative to carboxymethyl cellulose of from about 1: 5, to about 5: 1 and wherein said binding inhibitor is a biodegradable quaternary ammonium compound. The toilet paper as described in Claim 2, further characterized in that said papermaking fibers comprise a mixture of hardwood fibers and softwood fibers, said hardwood fibers comprising at least about 50% and said soft wood fibers comprising at least about 10% of said fibers for papermaking. The toilet paper as described in Claim 3, further characterized in that said toilet paper comprises, at least two superimposed layers, an inner layer and at least one outer layer contiguous with said inner layer. The toilet paper as described in Claim 4, further characterized in that said toilet paper comprises three superimposed layers, an inner layer and two outer layers, said inner layer being located between said two outer layers. The toilet paper as described in Claim 5, further characterized in that said inner layer comprises soft wood fibers, having an average length greater than at least about 2.0 mm, and said outer layers comprising hardwood fibers , which have an average length less than about 1.0 mm. The toilet paper as described in Claim 6, further characterized in that said softwood fibers comprise northern softwood Kraft fibers and the hardwood fibers comprise eucalypt Kraft fibers. 8. The toilet paper as described in claim 7, further characterized in that the composition for facilitating crepitation is contained in at least one of said outer layers. 9. The toilet paper as described in the Claim 8, further characterized in that said composition for facilitating crepitation is contained both in said outer layers. 10. The toilet paper as described in the Claim 2, further characterized in that said foamed toilet paper is a densified paper with an applied pattern. The toilet paper as described in Claim 2, further characterized in that the carboxymethyl cellulose has a molecular weight in a range of from about 90,000 to about 700,000. The toilet paper as described in Claim 11, further characterized in that the carboxymethyl cellulose has a degree of substitution in a range of from about 0.3 to about 1.4. 13. The toilet paper as described in claim 2, further characterized in that the cationic starch has a degree of substitution in a range of from about 0.01 to about 0. 1. 14. The toilet paper as described in the Claim 13, further characterized in that the cationic starch is derived from waxy corn. 15. The toilet paper as described in the Claim 2, further characterized in that the biodegradable quaternary ammonium compound has the following formula: R2 (CH2) n - Y - R3 / x- / \ R2 (CH2) n - Y • 3 R2 (CH2) n - Y - 3 N R2 R1 wherein each substituent R2 is an alkyl or hydroxyalkyl group of C 1 to C 6, benzyl group or mixtures thereof; Each substituent Ri is a C 12 to C 22 hydrocarbyl group, or a substituted hydrocarbyl group or mixtures thereof; each substituent R 3 is a hydrocarbyl group of C 1 to C 23, or a substituted hydrocarbyl group or mixtures thereof; Y is -O-C (O) - or C (O) -O- or -NH-C (O) -O-C (O) -NH-, and mixtures thereof; n is 1 to 4 and X "is an appropriate anion 16. Toilet paper as described in Claim 15 further characterized in that R 2 is methyl, R 3 is C 15 -C 17 alkyl or alkenyl, and Ri is C 16 -C 18 alkyl or alkenyl 17. The toilet paper as described in Claim 15, further characterized because Y is - O - C (O) - or - C (O) - O -. 18. The toilet paper as described in Claim 16, further characterized in that X- is chloride or methyl sulfate. 19. The toilet paper as described in claim 2, further characterized in that the biodegradable quaternary ammonium compound has the formula: R3 - Y - CH2 \ CH - CH2 - N + - (R2) 3 X "/ R3 - Y wherein each substituent R2 is an alkyl or hydroxyalkyl group of C 1 to C 4, benzyl group or mixtures thereof; Each substituent R 3 is a hydrocarbyl group of C 1 to C 23, or a substituted hydrocarbyl group or mixtures thereof; Y is -O-C (O) - or C (O) -O- or -NH-C (O) -O-C (O) -NH-, and mixtures thereof; n is from 1 to 4 and X is a suitable anion. 20. The toilet paper as described in Claim 19, further characterized in that each R 2 is methyl, R 3 is C 15 -C 17 alkyl or alkenyl, and Ri is alkyl or alkenyl is C 16 -C 18. 21. The toilet paper as described in Claim 19, further characterized in that Y is -O-C (O) - or -C (O) -O-. 22. The toilet paper as described in Claim 19, further characterized in that X- is chloride or methyl sulfate. 23. The toilet paper as described in Claim 15, further characterized in that the substituent R3 is derived from vegetable oil sources. 24. The toilet paper as described in the Claim 19, further characterized in that the substituent R3 is derived from vegetable oil sources. 25. The toilet paper as described in Claim 2, further characterized in that said biodegradable binding inhibitor is present in a ratio relative to carboxymethyl cellulose of from about 1: 2 to about 2: 1. 26. A process of manufacture for a foamed toilet paper, which comprises the steps of: a) forming an aqueous pulp of fibers for the manufacture of paper; b) adding a composition to facilitate crepitus, which comprises: i) from about 0.02% to about 1.0% by weight, of a biodegradable binding inhibitor, this percentage being based on the dry weight of the fibers for the paper preparation; ii) from about 0.02% to about 0.5% by weight, of a water soluble carboxymethyl cellulose, based on this percentage, on the dry weight of the papermaking fibers; and iii) from approximately 0.05% to approximately 3. 0% by weight, of a cationic starch, based on this percentage, on the dry weight of the papermaking fibers, wherein said biodegradable binding inhibitor is present in a ratio relative to carboxymethyl cellulose of from about 1: 5 to about 5: 1.; c) the deposition of fibers for the manufacture of paper on a foraminous surface, so that the excess water used to form the dispersion is extracted, forming an embryonic coil; d) the transfer of the embryo coil, to a surface of a conveyor, on which the extraction of the water continues, forming a semi-dry coil, said surface of the conveyor being selected from the group consisting of felts and forming materials for manufacturing the paper; e) transferring the semi-dry coil to the surface of a Yankee dryer, over which the drying continues until the coil reaches a substantially dry condition; f) removing the dry coil from the Yankee dryer by means of a creping blade; and g) winding the fluff paper spool on a spool. 27. The process as described in claim 26, further characterized in that the constituents of said composition for facilitating crepitation are separately added in the form of aqueous dispersions to said aqueous pulp of papermaking fibers before depositing the fibers on said foraminous surface. 28. The process as described in Claim 27, further characterized in that said biodegradable binding inhibitor is a quaternary ammonium compound. 29. The process as described in Claim 28, further characterized in that the quaternary ammonium compound is added before the cationic starch. 30. The process as described in Claim 29, further characterized in that the carboxymethyl cellulose is added to said aqueous slurry before the quaternary ammonium bond inhibitor. 31. The process as described in Claim 26, further characterized in that said conveyor surface is a forming material, such that said toilet paper is densified with applied patterns. The process as described in Claim 31, further characterized in that the moisture content of the semi-dry coil at the point of transfer to the surface of the Yankee dryer is less than about 40%. 33. The process as described in Claim 32, further characterized in that while the semi-dry coil is on said forming material to form a low density structure, hot air is forced through said semi-dry coil. 34. The process as described in Claim 26, further characterized in that said coil is secured to the Yankee dryer by means of an adhesive selected from the group consisting of hydrolyzed polyvinyl alcohol resin, polyamide resin, polyamine resin, mineral oil, and mixtures thereof. 35. The process as described in Claim 34, further characterized in that said adhesive is selected from the group consisting of polyamide epichlorohydrin resin, mineral oil and mixtures thereof. EXTRACT OF THE INVENTION Soft foamed toilet paper products are described, comprising papermaking fibers and a biodegradable composition to facilitate crepitus. The composition for facilitating crepitus is a biodegradable binding inhibitor, a cationic starch and a carboxymethyl cellulose. Preferably, the biodegradable binding inhibitor is a biodegradable quaternary ammonium compound. The use of a biodegradable binding inhibitor, a cationic starch and a carboxymethyl cellulose results in a spongy toilet paper, which is both strong and soft at the same time. A process for making the foamed paper is also described, which comprises the addition of the composition to facilitate crackling. The composition offers the potential to improve production capacity.