JP2008223161A - Sanitary paper having improved surface property and softness using externally added softener and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To minimize problems in operation (various trouble in operation such as strength deterioration of a web, dyeing inhibition of a dye, staining of tools such as a wire or a felt and production of bubbles in the system) by a conventional technique (internal addition) and to improve quality requirements such as a bulky feeling, softness, water absorbency or beautiful appearance of a product. <P>SOLUTION: Sanitary paper is obtained by externally adding a release agent and/or an adhesion agent and a softener to a paper stock for tissue paper or toilet paper. The softener is a self-emulsifiable type softener composition comprising (1) 40-80 wt.% of a cationic compound, (2) 10-30 wt.% of a nonionic surfactant, (3) 1-5 wt.% of an organic acid or an inorganic acid, (4) 5-20 wt.% of an organic solvent and (5) 2-15 wt.% of water or a water diluted liquid thereof. The sanitary paper has improved surface properties and softness. A method for producing the sanitary paper and the externally added softener used therefor are provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sanitary paper having improved surface properties and flexibility by adding a softening agent to tissue paper, toilet paper, etc. used for home use or business use by an external addition method such as spraying, and a method for producing the same.

As a technology for softening tissue paper and toilet paper with chemicals, softwood kraft pulp and hardwood kraft pulp with a certain range of fiber length and fiber roughness are blended in a specific range, and a softening agent is added to this stock (including A technique for obtaining a bulky and flexible crepe paper by forming a wet paper by adding a dispersant typified by polyethylene oxide and then performing a creping treatment is disclosed. (Patent Document 1)
Further, 1) a quaternary ammonium compound and 2) an ethylene oxide adduct of a fatty alcohol and 3) an ethylene oxide adduct of a fatty acid 1) 2) a nonionic surfactant selected from the group of 3) are produced in tissue paper. Sometimes it has been proposed to internally add to the preparation process.
Since these chemicals act to inhibit hydrogen bonding, they are sometimes referred to as chemical debinding agents or debonder softeners. (Patent Document 2)
In the above patents (Patent Documents 1 and 2), 0.02 to 2.0% debonder softener is added to the stock in the preparation process of tissue paper and toilet paper, thereby reducing the strength of the web and dyeing. It causes various troubles in operation such as obstruction, contamination of tools such as wire and felt, and generation of bubbles in the system. Furthermore, in terms of quality, the coating with the Yankee dryer is changed, and the crepe shape, flexibility and absorbency are affected.
On the other hand, strength additive, absorbent additive, lubricant / plasticizer / cationic debinding agent / non-cationic debinding agent alone or mixed, and aesthetic additive in reel part heating calendar (heat transfer) A method of improving the strength, flexibility, absorbency, and aesthetics of tissue paper by adding 0.004 to 2.0% spray (as an external additive) alone or in a mixture to the dry weight of tissue web. ing. (Patent Document 3) Furthermore, by using a solid lubricant, such as molybdenum disulfide as a crepe aid in addition to an adhesive and a release agent, a high-quality crepe with less paper dust and less wear on the doctor blade. It is disclosed that paper is obtained. (Manufacturing method) (patent document 4)
By adding a fatty acid ester compound (two kinds of a cationic fatty acid ester and a nonionic fatty acid ester compound) and / or a fatty acid amide compound by internal or external addition, not only softness but also smooth thin leaf sanitary paper Is disclosed. (Patent Documents 5 and 6)

JP 2006-097191 A JP-A-57-136426 Special table hei 8-500860 JP2001-064897 JP 2004-188078 A JP2004-044058

  The present invention solves operational problems with the prior art (internal addition) (various operational problems such as reduced strength of the web, inhibition of dyeing, contamination of tools such as wires and felt, and generation of bubbles in the system). It is intended to minimize and improve quality requirements such as product bulkiness, flexibility, water absorption and aesthetics.

As a result of earnest research, the inventors have found a method for solving the problems as a means of avoiding operational troubles in the conventional technique, particularly internal addition, having a flexible drug composition and an external addition method. .
Yankee spray (external addition device) for forming a Yankee dryer coating, known as Yankee dryer coating agent, that is, 1) release agent, 2) in addition to adhesive agent, 3) self-emulsifying type softener, release agent and / or adhesive agent The mixture containing 10% to 50% is spray-coated on the Yankee dryer as a coating agent, or the self-emulsifying softener is sprayed alone on the sheet on the press part, and the adhesive and / or release agent is Yankee dryer. By spraying directly onto the sanitary paper web, by applying 0.001 to 0.015% (10 to 150 ppm) of a self-emulsifying softener in weight percent, it is flexible and has a bulky feel, water absorption, and beauty. Excellent sanitary paper is obtained.
The components of the self-emulsifying softener are 1) a cationic compound, 2) a nonionic surfactant, 3) an organic acid, 4) an organic solvent, and 5) a mixture of water.

  By adding 0.001 to 0.015% (10 to 150 ppm) by weight of the self-emulsifying softener of the present invention to the tissue paper web, the flexibility of the tissue paper is remarkably improved and the crepe is fine and bulky. The creping doctor replacement cycle could be extended in terms of operation, with low powder volume and good water absorption. There were no troubles seen during the internal addition of the softening agent. The amount of the self-emulsifying softening agent was one-tenth that of the internal addition.

The present invention will be described below with reference to the preferred embodiments of the present invention with reference to the drawings, but these are given for illustrative purposes and do not limit the present invention.
Sanitary tissue products typified by facial tissue and toilet paper have a wide variety of product forms and qualities (ie basis weight, thickness, strength, sheet size, flexibility, etc.). However, the basic production method is common to crepe paper. Creping (a corrugated wrinkle called crepe) is a means for mechanically compressing paper in the longitudinal direction (machine traveling direction).
FIG. 1 is a process diagram showing an example of the production method of the present invention.
A web having a basis weight of 7 to 40 g / m ² on the Yankee dryer 6 is peeled off at the position of the creping doctor 11 in FIG. 1 and wound up by the reel part 12. The speed difference between the Yankee dryer 6 and the reel part 12 is as follows. (The reel part speed is slower than the Yankee dryer), so that a crepe called crepe is formed in the creping doctor 11. The quality necessary for the tissue, ie, bulk (bulk feeling), softness, water absorption, surface smoothness, aesthetics (crepe shape), etc., are affected by the conditions of this part. Depending on the speed difference condition, if the basis weight on the Yankee dryer 6 is the above condition, the basis weight on the reel 12 is approximately 9 to 50 g / m ^2, which is heavier than the basis weight on the Yankee dryer 6.
Here, the crepe rate based on the speed difference between the Yankee dryer 6 and the reel 12 is defined by the following equation.

Crepe rate (%) = 100 × (Yankee dryer speed (m / min) −reel speed (m / min)) ÷ reel speed (m / min)

The quality and operability are largely determined by how the creping conditions are used, and the optimum condition operation in this part is an important matter for those skilled in the art. The crepe rate in the present invention is preferably in the range of 10% to 50%.
The Yankee dryer 6 is a cast iron or cast steel drum for drying tissue webs, and the outer diameter is generally 8 to 20 feet.
The process diagram of FIG. 1 will be described in the order of processes. When virgin raw material is used for stock preparation 1, blended with a specific range of softwood kraft pulp and hardwood kraft pulp with a certain range of fiber length and fiber roughness, and mixed with a beater represented by a double disc refiner Beat the Canadian Standard Freeness (Csf) so that it falls within 50 Csf. The chemicals added to the paper stock are softeners including debonder softeners, bulking agents, antiviral agents, anti-fluff agents, dyes, dispersants, wet paper strength enhancers, dry paper strength agents, filter, depending on the required quality of the final product. Add water improver, pitch control agent, absorbency improver, wetting agent and so on.
In the above, the softwood pulp has a weight average fiber length in the range of 2.20 mm to 3.50 mm, and a fiber roughness expressed in mg per 100 m of fibers in the range of 11.0 to 20.0 mg / 100 m. The amount of fine fibers of 300 mesh or less is 10% or less, and the hardwood pulp has a weight average fiber length in the range of 0.70 mm to 0.90 mm and a fiber roughness of 7.0 to 13.0 mg / 100 m. In which the amount of fine fibers of 300 mesh or less is 10% or less, and the mixture ratio of softwood pulp and hardwood pulp in a ratio of 80/20 to 20/80 is included.
As typical conifer pulp having the above-mentioned characteristics, either black spruce or white spruce (scientific name: Picea), larch genus (scientific name: Larix genus) or some pine genus (scientific name: Pinus genus) Is used as a raw material. The reason why fiber length and fiber roughness are important in softwood pulp is that if these values are too large, the fibers will not be sufficiently dispersed in the paper layer forming process, so-called formation will be disrupted, and thick and thin unevenness will occur in the paper web. This results in a very uneven appearance.
On the other hand, if the value is too small, it becomes difficult to bond between fibers, which hinders the expression of strength, which is an important function of softwood pulp. It is preferable that the number of fine fibers of 300 mesh or less is as small as possible because it causes generation of paper dust.
Representative hardwood pulps include Eucalyptus grandis, E. et al. macarthurii, E .; fastiga, E .; nites, E .; globes, Acacia
mangium and the like. The required properties of hardwood pulp are almost the same as those of softwood, but it is desirable that the fiber roughness be as small as possible because the fiber roughness greatly affects the surface properties of the final product.
1-30% of the stock (raw material) prepared in this way is diluted with white water, and after degassing screening dust removal, it is sent to the stock inlet with a pump called a fan pump that has little pressure change even if the flow rate changes. .
On the other hand, when using waste paper raw material, the same beating process and chemical process are performed as in the case of the virgin type.
The stock inlet function is a uniform, floc-free (small lump) over the entire wire width of the paper machine, and a well-dispersed raw material is supplied onto the wire at an appropriate concentration, speed, and angle so as not to cause flow streaks. That is. Stock inlets include headboxes that are open to the atmosphere at high altitudes, pressurization types, and hydraulic types. Any of the above may be adopted in the present invention.
A diluted paper stock is jetted from the stock inlet 2 to the wire of the wire part 3 to form a sheet on the wire.
There are a round net type, a long net type (Ford linear) type, a suction breast type, a short net type, a twin wire type, a crescent former, etc. as the method of the wire part 3, but any of them may be adopted in the present invention.
The web formed by the wire part 3 is moved to the felt of the press part 4. Here, the paper is mechanically compressed by a suction pressure roll 5 or a pressure roll or a press roll without suction, or is continuously dehydrated by a dehydration method such as aeration drying with hot air. As a means for moving the sheet from the press part 4 to the Yankee dryer 6, a suction pressure roll 5 or a pressure roll without suction is used. Further, the sheet is dried by the Yankee dryer 6 and the Yankee dryer hood 7, the sheet is creped by the creping doctor 11, and the sanitary paper is taken up by the reel part 12.
Yankee spray plays an important role in performing this creping process optimally. Normally, Yankee spray uses polyamide polyamine resin (PA resin), typically Herculis Kleptotrol 190, and polyamide amine epichlorohydrin (PAE resin), Herculis Kylene 557H, as a typical example. PVA), a polyamide plasticizer addition product, a polyamide softener addition product, a modified polyamidoamine, polyvinyl acetate and the like are used alone or in combination as an adhesive.
The amount added to the sheet by spray addition is 0.001 to 0.5% by weight with respect to the sheet. Paraffinic mineral oil, naphthenic mineral oil, vegetable oil, animal oil, higher fatty acid, hydrocarbon compound, nonionic surfactant, ethylene glycol, propylene glycol, diethylene glycol, glycerol, polyethylene glycol, esterified product of polyethylene glycol oil, silicon compound, di Whether the release agent selected from propylene glycol, triethanolamine, polyoxyethylene fatty acid ester, etc. is used alone or as a mixture of two or more types as a release agent, and the adhesive and release agent are mixed and sprayed on the surface of the Yankee dryer Adhesive and release agent are sprayed separately. In addition to the surface of the Yankee dryer, the spray part may be sprayed directly on the sheet of the press part.
The adhesive and / or release agent used in the present invention is not special, and the above-mentioned known adhesive and / or release agent is used. In the present invention, the effect of the tissue softening treatment can be further enhanced by blending a softening agent having compatibility with the release agent.

Here, the chemicals of the present invention sprayed directly on the Yankee dryer 6 or on the sheet on the press part 4 and the adding method are arranged.
The chemicals used in the present invention are 1) adhesive, 2) release agent, 3) self-emulsifying softener.
In the prior art, 1) an adhesive and 2) a release agent were used alone or in combination to form a Yankee dryer metal touch prevention film. In more detail, the formation of a flexible protective base coating and the adhesion and release of tissue sheets to a Yankee dryer are important to obtain an optimal crepe. The present invention is characterized in that a self-emulsifying softener is added in addition to the above-mentioned adhesive and release agent. The softener addition method of the present invention is roughly classified into the following four types.

A) The self-emulsifying softener is sprayed directly onto the sheet on the press part 4 alone, and the adhesive and / or release agent is sprayed directly onto the Yankee dryer 6 by the Yankee spray 8 (External Addition A method). .

B) A method in which a self-emulsifying softener is mixed with a release agent and sprayed directly onto the Yankee dryer 6 or sprayed onto a sheet on the press part 4, and the adhesive is sprayed directly onto the Yankee dryer 6 by a separate spray header or pressed part 4 Spray onto the upper sheet (external additive B method).

C) A self-emulsifying softener, an adhesive and a release agent are mixed in advance and sprayed directly from one header onto the Yankee dryer 6 or onto a sheet on the press part 4 (external addition C method).

D) Softener and adhesive are mixed and sprayed directly on the Yankee dryer 6 or sprayed on the sheet on the press part 4, and the release agent is sprayed directly on the Yankee dryer 6 or sprayed on the sheet on the press part 4 by a separate spray header. (External method D).

The self-emulsifying softener chemical used in the present invention will be described in detail.
The components of the self-emulsifying softener used in the present invention are 1) a cationic compound 2) a nonionic surfactant 3) an organic acid or an inorganic acid 4) an organic solvent 5) a mixture of water.

1) As a component of the cationic compound, an aliphatic quaternary ammonium salt, an aliphatic primary higher alkylamine salt, an aliphatic secondary higher alkylamine salt or an aliphatic tertiary higher alkylamine salt is an organic acid. Neutralized cationic compounds, cationic surfactants in which alkylene oxide is added to polyamines, archebel type (polyamide polyamine type) A type or G type, solomine A type, sapamin A type, imidazoline type, aromatic quaternary ammonium salt And a heterocyclic quaternary ammonium salt.
Aliphatic quaternary ammonium salts are often used which are quaternized dimethyl fatty amines. The number of carbon atoms of the aliphatic alkyl group is _{C 18} from _{C 12.} Other alkyltrimethylammonium salts, trimethylammonium chloride or bromide or iodide, alkyltrimethylammonium chloride or bromide or iodide, dialkyldimethylammonium salt, dimethyldialkylammonium chloride or bromide or iodide, dialkyldimethylammonium chloride or bromide Alternatively, iodide may be used.

  2) Polyionic alcohol monofatty acid esters such as sorbitan fatty acid ester, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate, propylene glycol monostearate as nonionic surfactants, N- (3 -Oleyloxy-2-hydroxypropyl) diethanolamine, polyoxyethylene (hereinafter abbreviated as POE) hydrogenated castor oil, POE sorbit beeswax, POE castor oil, POE hydrogenated castor oil, POE sorbitan sesquistearate, POE monooleate, POE sorbitan sesquistea Rate, POE alkylamine, POE glyceryl monooleate, POE sorbitan monostearate, POE monostearate, POE monolaurate, PO Monooleate, POE sorbitol fatty acid ester, POE cetyl ether, POE stearyl ether, POE lauryl ether, POE bisphenyl ether, POE polyoxypropylene block copolymer, POE alkylphenyl ether, POE polyoxypropylene alkyl ether, POE alkylamine, glyceryl stearate (Glycerol monostearate) is selected.

  3) Organic acids or inorganic acids include formic acid, acetic acid, propionic acid, lactic acid, butyric acid, citric acid, lauric acid, oleic acid, stearic acid, succinic acid, gluconic acid, adipic acid, alkyl phosphoric acid, sulfonic acids, sulfuric acid ester, hydrochloric acid , Selected from sulfuric acid and phosphoric acid.

  4) Organic solvents such as ethanol, propyl alcohol, cetyl alcohol, glycerin, ethylene glycol, polyethylene glycol, butylene glycol, propylene glycol, polypropylene glycol, polyethylene oxide, polyvinyl pyrrolidone, acetone, methyl ethyl ketone, toluene, chloroform, ethyl ether, xylene lauryl It is selected from alcohol and stearyl alcohol.

The components of the self-emulsifying softener of the present invention are as follows:
1) Cationic compound 2) Nonionic surfactant 3) Organic acid or inorganic acid 4) Organic solvent 5) Each ratio of the mixture of water is in the following range.
1) Cationic compound 40-80% 2) Nonionic surfactant 10-30% 3) Organic acid or inorganic acid 1-5% 4) Organic solvent 5-20% 5) Water 2-15%
Since the self-emulsifying softener of the present invention is optionally emulsified and dispersed in water, it can be used after diluting with water or the like when externally added.
The mechanism by which the self-emulsifying softener of the present invention has an effect of improving flexibility and surface smoothness will be described.
From the viewpoint of the coefficient of friction acting between the cellulose fibers, the softeners that reduce the coefficient of friction are arranged by type as follows.
Cationic and amphoteric> Polyhydric alcohol>Anion> PEG (polyethylene glycol)> Mineral oil, silicone Friction coefficient works between cellulose fibers and actually touches hands (fingerprints) and is actually human touch Is different.
Cationic compounds have excellent tactile sensation and texture in addition to the effect of lowering the coefficient of friction, but they may worsen paper strength and water absorption, so these disadvantages can be achieved by adding selected nonionic surfactants. Can be supplemented. Furthermore, when polyethylene is introduced into the softening agent, the surface of the Yankee dryer and the surface of the sanitary tissue sheet are smoothed by its characteristics, and there is an effect of improving and stabilizing the drying property and the creping property.
In addition, when the softener is applied in the tissue manufacturing process, the influence on the operation of the Yankee dryer is highly influenced by the operation. This coating may cause the crepe to become finer or rougher at the creping doctor part, and the sanitary paper may be easily peeled off by the softening agent at the creping doctor part, so that the worst crepe may not enter well or the crepe may become uneven. .
By optimizing the softener selected in the present invention, the method of adding the softener, and the amount added to the tissue, it becomes possible to produce a sanitary tissue excellent in surface properties and flexibility.
Furthermore, the frequency of replacement of the creping doctor is reduced by optimizing the softener of the present invention, the method for adding the same, and the amount added to the tissue, leading to stable operability.
EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples.

＜実施例１＞

<Example 1>

The components of the self-emulsifying softener are 1) a cationic compound, 2) a nonionic surfactant, 3) an organic acid or inorganic acid, 4) an organic solvent, 5) a mixture of water, specifically 1) a polyamide as the cationic compound. Neutralized with acetic acid as neutralizing agent using archival type polysaturic surfactant (stearic acid as saturated carboxylic acid). [Chemical Formula 5] A cationic compound of the formula was obtained. For the purpose of enhancing hydrophilicity, 2) Polyoxyethylene sorbitol fatty acid (stearic acid) ester as an ether ester type nonionic surfactant is mixed with the cationic compound of 1), and 4) The organic solvent is intended to aid dissolution. The composition ratio of 1) to 5) using ethylene glycol and 5) water is 1) cationic compound 60%
2) Nonionic surfactant 20%
3) Organic acid (acetic acid) 3%
4) Organic solvent (ethylene glycol) 7%
5) Water 10%
The viscosity of the self-emulsifying softener was 550 mPa · s at 25 ° C., and the pH in a 1% solution obtained by dissolving the softener in water was 3.9.
The self-emulsifying type softening agent is added by the external addition method A described in the embodiment, and the self-emulsifying type softening agent is 0.005% by weight with respect to tissue paper having a basis weight of 13.4 g / m ² on the reel. The agent was added.
Regarding the method for producing tissue paper, the known materials shown in the embodiment were used, and the following materials were used.
Conifer kraft pulp has a weight average fiber length of 3.1 mm, fiber roughness of 13.6 mg / 100 m, and 40% fine fiber with a mesh size of less than 300 mesh is 4.0%. Hardwood pulp is a weight average fiber. 60% of a fiber having a length of 0.80 mm, a fiber roughness of 8.8 mg / 100 m, and a fine fiber amount of 300 mesh or less of 8.2% was blended.
Table 1 shows the quality of tissue paper wound on the reel and the operating conditions of the tissue papermaking process.
The tissue paper base taken up by the reel was overlapped by a ply machine, then folded and boxed by a multi-folder processing machine to obtain the tissue paper product of the present invention. Table 2 shows the product quality.
<Example 2>

The components of the self-emulsifying softener are 1) a cationic compound, 2) a nonionic surfactant, 3) an organic acid or inorganic acid, 4) an organic solvent, 5) a mixture of water, specifically 1) a polyamide as the cationic compound. Neutralization using polyamine type surfactant, arkobelle type (oleic acid as unsaturated carboxylic acid) and organic acid (acetic acid) as neutralizing agent. A cationic compound was obtained.
2) Polyoxyethylene hydrogenated castor oil is mixed with the cationic compound of 1) as an ether ester type nonionic surfactant for the purpose of strengthening hydrophilicity, and 4) The organic solvent uses cetyl alcohol for the purpose of dissolving. 5) Composition ratio of 1) to 5) with water added: 1) 60% cationic compound
2) Nonionic surfactant 20%
3) Organic acid (acetic acid) 3%
4) Organic solvent (cetyl alcohol) 12%
5) Water 5%
The viscosity of the self-emulsifying softener was 600 mPa · s at 25 ° C., and the pH in a 1% solution obtained by dissolving the softener in water was 4.7.
The self-emulsifying type softening agent is added by the external addition method B described in the embodiment, and the self-emulsifying type softening agent is 0.005% by weight with respect to tissue paper having a basis weight of 13.1 g / m ² on the reel. The agent was added. In the external additive B method, 20% of the self-emulsifying softener was blended with the release agent (compound mainly composed of mineral oil).
Regarding the method for producing tissue paper, the known materials shown in the embodiment were used, and the following materials were used.
Conifer kraft pulp has a weight average fiber length of 3.1 mm, a fiber roughness of 13.6 mg / 100 m, and a blend of 30% with a fine fiber content of less than 300 mesh of 4.0%. Hardwood pulp has a weight average fiber. 70% of a fiber having a length of 0.80 mm, a fiber roughness of 8.8 mg / 100 m, and a fine fiber content of 300 mesh or less of 8.2% was blended.
Table 1 shows the quality of tissue paper wound on the reel and the operating conditions of the tissue papermaking process.
The tissue paper base taken up by the reel was overlapped by a ply machine, then folded and boxed by an interfolder machine to obtain the tissue paper product of the present invention. Table 2 shows the product quality.
<Example 3>

The components of the self-emulsifying softener are 1) a cationic compound 2) a nonionic surfactant 3) an organic acid or inorganic acid 4) an organic solvent 5) a mixture of water, specifically 1) ethylenediamine as the cationic compound In addition, an adduct of ethylene oxide and propylene oxide (each 4 mol) converted to an ester salt with oleic acid was used.
For the purpose of enhancing hydrophilicity 2) Polyoxyethylene polyoxypropylene block copolymer as an ether type nonionic surfactant is mixed with the cationic compound of 1). 4) The organic solvent is cetyl alcohol to aid dissolution. 5) Water was added Acetic acid was used as a neutralizing agent for the alkali catalyst when producing the cationic compound of 1). The composition ratio of 1) to 5) is as follows: 1) 60% cationic compound
2) Nonionic surfactant 20%
3) Organic acid (acetic acid) 3%
4) Organic solvent (cetyl alcohol) 7%
5) Water 10%
The viscosity of the self-emulsifying softener was 510 mPa · s at 25 ° C., and the pH in a 1% solution obtained by dissolving the softener in water was 4.9.
The self-emulsifying type softening agent is added by the external addition method C described in the embodiment, and the self-emulsifying type softening agent is 0.005% by weight with respect to tissue paper having a basis weight of 13.1 g / m ² on the reel. The agent was added. In the external addition C method, the composition ratio of the adhesive (polyamide polyamine resin), the release agent (mineral oil-based compound) and the self-emulsifying softener was 20:50:30.
The production method, raw material composition, and processing method of tissue paper are the same as in Example 2 <Example 4>

The components of the self-emulsifying softener are 1) a cationic compound 2) a nonionic surfactant 3) an organic acid or inorganic acid 4) an organic solvent 5) a mixture of water, specifically 1) ethylene as the cationic compound. Tetraamine was block-added with ethylene oxide and propylene oxide (5 mol each), and further used as an ester salt with oleic acid. 2) Polyoxyethylene polyoxypropylene alkyl ether as an ether type nonionic surfactant is mixed with the cationic compound of 1). 4) The organic solvent uses lauryl alcohol for the purpose of dissolution aid. 5) Adds water. In addition, formic acid was used as a neutralizing agent for the alkali catalyst in the production of the cationic compound 1). The composition ratios of 1) to 5) are as follows: 1) 70% cationic compound
2) 15% nonionic surfactant
3) Organic acid (formic acid) 3%
4) Organic solvent (lauridome alcohol) 7%
5) Water 5%
The viscosity of the self-emulsifying softener was 630 mPa · s at 25 ° C., and the pH in a 1% solution obtained by dissolving the softener in water was 4.9.
The self-emulsifying type softening agent is added by the external addition method A described in the embodiment, and the self-emulsifying type softening agent is 0.005% by weight with respect to toilet paper having a basis weight of 16.4 g / m ² on the reel. The agent was added.
About the manufacturing method of toilet paper, the well-known apparatus shown by the embodiment was used, and the following were used for the raw material.
Conifer kraft pulp has a weight average fiber length of 3.1 mm, a fiber roughness of 13.6 mg / 100 m, and a blend of 30% with a fine fiber content of less than 300 mesh of 4.0%. Hardwood pulp has a weight average fiber. 70% of a fiber having a length of 0.80 mm, a fiber roughness of 8.8 mg / 100 m, and a fine fiber content of 300 mesh or less of 8.2% was blended.
Table 1 shows the quality of the toilet paper wound on the reel and the operating conditions of the tissue papermaking process.
Toilet paper rolls wound up on reels are stacked on a roll winder, printed, embossed, perforated, tail sealed, cut to a predetermined width (114 mm), film processed on 4 rolls, cardboard packed It was set as the toilet paper product of invention. Table 2 shows the product quality.
<Example 5>

The components of the self-emulsifying softener are 1) a cationic compound 2) a nonionic surfactant 3) an organic acid or inorganic acid 4) an organic solvent 5) a mixture of water, specifically 1) diethylenetriamine as the cationic compound And a polyamide compound obtained from oleic acid to which ethylene oxide was added (3 mol) was used. 2) Polyoxyethylene alkylphenyl ether as an ether type nonionic surfactant is mixed with the cationic compound of 1). 4) The organic solvent is stearyl alcohol for the purpose of solubilization. 5) Water is added. Formic acid was used as a neutralizing agent for the alkali catalyst in the production of the cationic compound. The composition ratio of 1) to 5) is as follows: 1) Cationic compound 50%
2) Nonionic surfactant 25%
3) Organic acid (formic acid) 3%
4) Organic solvent (stearyl alcohol) 15%
5) Water 7%
The viscosity of the self-emulsifying softener was 490 mPa · s at 25 ° C., and the pH in a 1% solution obtained by dissolving the softener in water was 4.6.
The self-emulsifying type softening agent is added by the external addition method B described in the embodiment, and the self-emulsifying type softening agent is 0.005% by weight with respect to toilet paper having a basis weight of 16.3 g / m ² on the reel. The agent was added. In the external addition method B, 30% of the self-emulsifying softener was blended with the release agent (compound mainly composed of mineral oil).
The toilet paper manufacturing method, raw material blending, and processing method are the same as in Example 4.
<Example 6>

The components of the self-emulsifying softener are 1) a cationic compound 2) a nonionic surfactant 3) an organic acid or inorganic acid 4) an organic solvent 5) a mixture of water, specifically 1) diethylenetriamine as the cationic compound And a polyamide compound obtained from stearic acid and a block addition of ethylene oxide and propylene oxide (5 mol each) were used. 2) Polyoxyethylene alkylamine as a nitrogen-containing nonionic surfactant was mixed with the cationic compound of 1), and 4) the organic solvent was cetyl alcohol for the purpose of solubilizing 5) water was added. Formic acid was used as a neutralizing agent for the alkali catalyst in the production of the cationic compound. The composition ratios of 1) to 5) are as follows: 1) 70% cationic compound
2) 15% nonionic surfactant
3) Organic acid (formic acid) 3%
4) Organic solvent (cetyl alcohol) 5%
5) Water 7%
The viscosity of the self-emulsifying softener was 510 mPa · s at 25 ° C., and the pH in a 1% solution obtained by dissolving the softener in water was 4.8.
The self-emulsifying type softening agent is added by the external addition method D described in the embodiment, and the self-emulsifying type softening agent is 0.005% by weight with respect to toilet paper having a basis weight of 16.6 g / m ² on the reel. The agent was added.
In the external addition C method, the composition ratio of the adhesive (polyamide polyamine resin), the release agent (mineral oil-based compound) and the self-emulsifying softener was 15:65:20.
The toilet paper manufacturing method, raw material blending, and processing method are the same as in Example 4.
<Comparative Example 1>

The raw material was blended in the same manner as in Example 1 and without the addition of a softening agent. Facial tissue was made using the known apparatus shown in FIG. The basis weight is 13.1 g / m ² . Table 1 shows other manufacturing conditions and paper quality at the base paper manufacturing stage. About a processing method, it is the same as Examples 1-3.
The quality of the processed product is as shown in Table 2.
<Comparative example 2>

The raw material was blended in the same manner as in Example 1 and the softener was the same self-emulsifying softener as in Example 1 and was internally added to the stock in the preparation process. The amount added is 0.05%, which is much higher than that of external additives. Embodiment Facial tissue was made using the known apparatus shown in FIG.
A large amount of foam was generated during the paper making process, and there were operational problems such as increased paper breakage due to a decrease in tissue paper strength.
The basis weight is 13.0 g / m ² . Table 1 shows other manufacturing conditions and paper quality at the base paper manufacturing stage. About a processing method, it is the same as Examples 1-3.
The quality of the processed product is as shown in Table 2.
<Comparative Example 3>

The raw material was blended in the same manner as in Example 4 and without the addition of a softening agent. Toilet paper was made using the known apparatus shown in FIG. The basis weight is 16.4 g / m ² . Table 1 shows other manufacturing conditions and paper quality at the base paper manufacturing stage. About the processing method, it is the same as Examples 4-6.
The quality of the processed product is as shown in Table 2.

(Measuring method)
1. Basis weight (g / m ² ) According to JIS P8124 Thickness (mm / 10 sheets) Measured with a Peacock dial gauge under a load of 40 g / cm ² . Tensile strength (gf / 25mm) Measure maximum load up to break according to JIS P8113 in gf
4). Water absorption (sec) Measured according to JIS S3104 5. In-system foaming properties Observe the operation status 6. MIU value and MMD value: Measured with a friction tester (KES-SE manufactured by Kato Tech). This apparatus is designed for the purpose of numerically evaluating the surface friction feeling of an object as an average friction coefficient (MIU value) and its variation (MMD value) and objectively evaluating it. Here, the MIU value represents the ease of slipping that humans feel or the difficulty of slipping. A larger MIU value means a tissue paper having a non-slip surface. Further, the MMD value represents a feeling of roughness, and the larger the value, the less smoothness means that the tissue paper has a rough surface. The actual operation of the device is to attach the tissue sample to an electric drum and grab the needle gravitationally towards the drum in the 12 o'clock direction. The drum is rotated to give a sample speed of 1 mm / sec and the sample is moved 2 cm relative to the probe. In this way, the probe scans a 2 cm long sample. The surface gauge has a frictional static load of 25 g, and the apparatus scans a 2 cm long sample with a piano wire probe and senses and measures the vertical displacement (mm) of the needle. The measured value was the average value in the vertical and horizontal directions.
7. Hand feel The tactile sensation was evaluated by five panelists.
Evaluation is 3 levels (good = 3, normal = 2, bad = 1)
Facial tissue has a tactile comparison between facial tissues Toilet paper has a tactile comparison between toilet papers

Sanitary paper manufacturing process diagram

Explanation of symbols

1 ... Stock preparation 2 ... Stock inlet 3 ... Wire part 4 ... Press part 5 ... Suction pressure roll 5 '... Suction box 6 ...・ Yankee dryer 7 ・ ・ ・ ・ Yankee food 8 ・ ・ ・ ・ Yankee spray 9 ・ ・ ・ ・ Line mixer 10 ・ ・ ・ ・ Mixture 11 ・ ・ ・ ・ Creping doctor 12 ・ ・ ・ ・ Reel part

Claims (8)

  Sanitary paper obtained by externally adding a release agent and / or an adhesive and a softener to tissue paper or toilet paper stock, wherein the softener is 1) cationic compound 40-80 w%, 2) nonionic interface A self-emulsifying softener composition containing 10 to 30 w% of an active agent, 3) 1 to 5 w% of an organic acid or inorganic acid, 4) 5 to 20 w% of an organic solvent, and 5) 2 to 15 w% of water, or a water dilution thereof. Sanitary paper with improved surface properties and flexibility   The external addition of release agent, adhesive and softener is: A) spray the softener directly on the sheet on the press part and spray the adhesive and / or release agent directly to the Yankee dryer B) softener and The release agent is mixed and sprayed directly onto the Yankee dryer or sprayed onto the sheet on the press part, and the adhesive is sprayed directly onto the Yankee dryer or sprayed onto the sheet on the press part via a separate spray header. 3) Mix with release agent and spray directly from one header to Yankee dryer or spray onto sheet on press part D) Softener and adhesive mix and spray directly onto Yankee dryer or spray onto sheet on press part The release agent is either sprayed directly onto the Yankee dryer or sprayed onto the sheet on the press part with a separate spray header Sanitary paper with improved surface properties and flexibility of Motomeko 1, wherein the.   The sanitary paper with improved surface properties and flexibility according to claim 1 or 2, wherein the self-emulsifying softener composition is added in an amount of 0.001 to 0.015% (10 to 150 ppm) based on the tissue paper web.   When the MMD value is 0.009 or less as measured by a friction tester (Kato-Tech KES-SE) and the MIU value is measured by a friction tester (Kato-Tech KES-SE), it is 0. The sanitary paper having improved surface properties and flexibility according to any one of claims 1 to 3, wherein the sanitary paper is 140 or less and 0.150 or less in the case of toilet paper.   The viscosity of the self-emulsifying softener composition is 300 to 700 mPa · s at 25 ° C, and the pH of a 1% aqueous solution of the self-emulsifying softener composition is 3.0 to 5.5. Sanitary paper with improved surface properties and flexibility as described in item 1 above.   A sanitary paper with improved surface properties and flexibility using the external softener according to any one of claims 1 to 5.   A method for producing sanitary paper with improved surface properties and flexibility according to claim 6.   The external additive softener for sanitary tissue according to any one of claims 1 to 6.

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