JP5875802B2 - Manufacturing method of sanitary paper - Google Patents

Description

The present invention relates to a process for the production of sanitary paper with improved domestic or tissue paper or toilet surface and flexibility by Nurigi a softener or moisturizer on paper for business.

In order to improve the flexibility of tissue paper and toilet paper, as a technology for softening fibers 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, A technique for obtaining a bulky and flexible crepe paper by adding a softener internally to a paper material and further forming a wet paper by further adding a dispersant such as polyethylene oxide and then performing a crepe treatment is disclosed. (Patent Document 1).
In addition, as a technique to improve flexibility by applying chemicals (external addition) to the surface of tissue paper or toilet paper webs by spraying, etc., it is possible to apply cationic compounds and nonionic surface activity to sheets on Yankee dryers or press parts. A technique for providing a self-emulsifying flexible composition comprising an agent, an organic acid or an inorganic acid, and an organic solvent is disclosed (Patent Document 2).
Furthermore, a technique for applying a chemical component composed of a softening agent or a moisturizing agent by spraying or printing in tissue paper folding processing equipment is disclosed (Patent Documents 3 and 4).

JP 2006-097191 A JP 2008-223161 A JP 2004-218151 A JP 2007-61143 A

However, it is known that there is a significant difference in texture between immediately after application of the water-soluble drug for improving the texture described above to the base paper and with time (1 day or more). In particular, this difference becomes significant when the amount of the drug applied is small relative to the dry weight of the base paper (for example, the amount of active ingredients is 10% or less of the dry weight of the base paper). This is because the hydrophilic drug applied to the pulp fiber surface of the base paper is absorbed and diffused inside the pulp fiber (inside the paper layer) over time due to the affinity and capillary action of the pulp fiber, and the drug remaining on the surface is relatively Due to the decrease. For this reason, in conventional tissue paper and toilet paper, the drug was applied excessively in anticipation of the texture change (deterioration of texture) over time, but the drug absorbed inside the fiber (paper layer) It does not contribute to smoothness and moisturizing feeling and is not wasted because it does not touch human skin.
Accordingly, the present invention aims to provide a method for producing sanitary paper effect texture improved the coating amount is less into the base paper of a water-soluble texture improving agent is sufficiently obtained.

The method for producing sanitary paper of the present invention comprises coating a water-soluble polyglycerin fatty acid ester of HLB11 or more on one side of a base paper for tissue paper or toilet paper, and a water-soluble softener and / or on one side of the base paper. A method for producing a sanitary paper to which a texture improving agent containing a water-soluble humectant is applied, wherein the water-soluble softener comprises a surfactant containing an aliphatic group having 8 to 24 carbon atoms, a water-soluble organopolysiloxane, And at least one selected from the group of water-soluble derivatives of the water-soluble organopolysiloxane, and the water-soluble humectant comprises at least one selected from the group of polyhydric alcohols, sugars, and amino acid compounds, On the felt of the press part in the paper making process of the base paper, or on the Yankee dryer that transferred the base paper from the felt, the water-soluble polyglycerin fat Spraying the ester to said one surface of the base paper.

In the sanitary paper manufacturing method of the present invention, it is preferable that the texture improving agent is sprayed between reels that wind up the base paper from the Yankee dryer outlet.
It is preferable to perform spraying of the texture improving agent using spray or rotor dampening.

  According to this invention, the effect of improving the texture can be sufficiently obtained even if the amount of the water-soluble texture improving agent applied to the base paper is small.

It is a figure which shows an example of the paper machine which manufactures the sanitary paper based on embodiment of this invention. It is the elements on larger scale of FIG. 1 which shows the spray header which coats a texture improving agent. It is the schematic of the spray header along the width direction of a web. It is the elements on larger scale of FIG. 1 which shows the rotor dampening which coats a feeling improving agent.

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. The sanitary paper according to the embodiment of the present invention is formed by coating a texture improving agent on one side of a base paper for tissue paper or toilet paper.
Further, the base paper is internally added with a water-soluble polyglycerin fatty acid ester of HLB11 or higher, or the water-soluble polyglycerin fatty acid ester is coated on one side of the base paper.
As will be described later, the sanitary paper according to the embodiment of the present invention is preferably creped. The term “coating” refers to a material in which a component such as a water-soluble polyglycerin fatty acid ester is attached to the surface of the base paper or inside thereof. Examples of the coating method include coating and spraying.

<Base paper>
A base paper for tissue paper or toilet paper is manufactured by making a paper-making raw material containing pulp. As the pulp, for example, virgin pulp such as softwood pulp or hardwood pulp, or used paper pulp regenerated from used paper can be used. Since these pulps greatly affect the quality of sanitary paper, they are appropriately blended in predetermined types and blending ratios according to the required quality. Various chemicals may be added (internally added) to the papermaking raw material for the required quality and stable operation. These chemicals include softeners, bulking agents, dyes, dispersants, wet paper strength enhancers, and drying agents. Examples thereof include paper strength agents, drainage improvers, pitch control agents, yield improvers, and the like.
The base paper can have a basis weight of 7 to 40 g / m ² , for example.

<Water-soluble polyglycerol fatty acid ester>
A water-soluble polyglycerin fatty acid ester of HLB11 or higher is internally added to the base paper, or the water-soluble polyglycerin fatty acid ester is coated on one side of the base paper. In this way, prior to the application of the texture improving agent described later, the water-soluble polyglycerin fatty acid ester component adheres to the surface of the base paper and the fiber surface of the paper layer in advance to become an anchor, and the texture improving agent diffuses into the fibers.・ It is thought that the adsorption is suppressed and the texture improving agent is stopped. Therefore, it is prevented that the texture improving agent is excessively applied and wasted. Water-soluble polyglycerin fatty acid ester has hydrophilic and hydrophobic groups in its molecular structure, so it has a high affinity with externally added texture-improving agents by fixing to the fiber surface, and the water absorption required for tissue paper and toilet paper The effect on food is relatively small, and food additives are highly safe.
Moreover, if it is HLB11 or more, the hydrophilicity is high and the effect of lowering the water absorption is small.

The amount of the water-soluble polyglycerin fatty acid ester added by internal or external addition to the base paper is preferably 0.02 to 1.0% by dry fiber weight ratio. If the amount added is less than 0.02% by dry fiber weight, absorption of the texture improving agent into the base paper cannot be sufficiently suppressed, and if it exceeds 1.0%, the effect will be saturated and the texture of the base paper may be impaired. There is sex.
The water-soluble polyglycerin fatty acid ester may be internally added to the base paper by adding the water-soluble polyglycerin fatty acid ester to the papermaking raw material. In order to promote the fixing of the water-soluble polyglycerin fatty acid ester to the fiber, the place where the internal addition is performed is immediately before the inlet 3 in FIG. 1 of the paper machine and immediately after the fan pump 2 (from the fan pump 2 to the inlet 3 in FIG. Between) is desirable.
When the water-soluble polyglycerin fatty acid ester is externally added to the base paper, the water-soluble polyglycerin fatty acid ester and the texture improving agent are added to the same surface (Yankee dryer surface). In the case of external addition, when one side of the obtained sanitary paper is seen, it is considered that the water-soluble polyglycerin fatty acid ester and the texture improving agent are mixed almost integrally.

<Feel improver>
The texture improving agent contains a water-soluble softening agent and / or a water-soluble humectant and is water-soluble. When the base paper is tissue paper, the amount of the texture improving agent added to the base paper is preferably 2 to 15% and more preferably 2 to 10% in terms of dry fiber weight. On the other hand, when the base paper is toilet paper, the dry fiber weight ratio is preferably 2 to 5%. When the base paper is tissue paper, if the added amount of the texture improving agent to the base paper is less than 2% by dry fiber weight ratio, the effect of improving the texture of the base paper does not occur. The improver may be wasted. Further, when the addition amount of the texture improving agent to the base paper exceeds 15% in terms of the dry fiber weight ratio as a liquid amount, the strength of the web decreases due to the aqueous component of the texture improving agent and the hydration action of the pulp in the base paper, Wrinkles are easy to enter. When the base paper is toilet paper, if it exceeds 5%, the web tends to break.

The water-soluble softening agent comprises at least one selected from the group consisting of a surfactant containing an aliphatic group having 8 to 24 carbon atoms, a water-soluble organopolysiloxane, and a water-soluble derivative of the water-soluble organopolysiloxane. Surfactants containing an aliphatic group having 8 to 24 carbon atoms include cationic surfactants, nonionic surfactants, anionic surfactants, and amphoteric surfactants, but cationic surfactants or nonions Surfactants are easily available. Examples of the cationic surfactant include aliphatic ammonium salts such as aliphatic quaternary ammonium salts and aliphatic primary alkylamine salts, and alkylamine salts. Nonionic surfactants include sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate, and the like.
In addition, when a nonionic (nonionic) surfactant having a low HLB containing an aliphatic group having 8 to 24 carbon atoms is used as a water-soluble softener, it is used in combination with a cationic surfactant or a high HLB ( 12 or more) By using in combination with a nonionic surfactant, self-emulsifying property can be imparted to a nonionic surfactant having a low HLB (10 or less) and water-solubilized.
Examples of the water-soluble organopolysiloxane include a polyoxyethylene / methylpolysiloxane copolymer which is a polyether-modified silicone and an aminoethylaminopropylmethylsiloxane / dimethylsiloxane copolymer which is an emulsified amino-modified silicone.
The water-soluble softening agent gives “smoothness” and “soft feeling”. Therefore, when the texture improving agent includes a water-soluble softening agent and does not include a water-soluble moisturizing agent, only “smoothness” and “soft feeling” can be obtained.

The water-soluble humectant is composed of at least one selected from the group consisting of polyhydric alcohols, sugars, and amino acid compounds. Examples of the polyhydric alcohol include glycerin, diglycerin, and propylene glycol. Examples of the saccharide include sorbitol, xylitol, glucose and the like. Examples of amino acid compounds include PCA soda (manufactured by Ajinomoto Co., Inc.).
The water-soluble humectant gives “suppleness” and “moist feeling”. Therefore, when the texture improving agent contains a water-soluble moisturizing agent and does not contain a water-soluble softening agent, only “softness” and “moist feeling” can be obtained. When the texture improving agent is blended with a water-soluble moisturizing agent and a water-soluble softening agent, both characteristics can be obtained.

The amount of the surfactant containing an aliphatic group having 8 to 24 carbon atoms added to the base paper is 0.2 to 5 wt% in terms of the dry fiber weight ratio of the base paper, and the water-soluble organopolysiloxane and the water-soluble organopolysiloxane The total amount of the water-soluble derivative added to the base paper is preferably 0.02 to 2 wt% in terms of dry fiber weight ratio.
Moreover, it is preferable that the addition amount of the above-mentioned water-soluble humectant to the base paper is 1 to 10 wt% of the dry fiber weight ratio.

  The sanitary paper of the present invention has an MMD value of 0.02 or less as measured by a friction tester (Kato-Tech KES-SE) and an MIU value as measured by a friction tester (Kato-Tech KES-SE). It is preferably 0.16 or less for paper and 0.20 or less for toilet paper.

Next, a method for manufacturing sanitary paper according to an embodiment of the present invention will be described with reference to FIG. First, a papermaking raw material is supplied from a raw material tank 1 for storing the papermaking raw material, and further diluted with white water to prepare a paper stock. After the degassing screening dust removal, this paper is sent to the stock inlet 3 by the fan pump 2. Stock Inlet 3 is a uniform, floc-free (small lump) across the wire width of the paper machine, and a well-dispersed fiber so that no flow streaks occur on the wire at the proper concentration, speed, and angle. Supply. As the stock inlet 3, there are a head box, a pressurization type, a hydraulic type, etc. installed at a high place in an open atmosphere, and any of them may be adopted.
Then, a stock is jetted from the stock inlet 3 between the wire 4 and the felt 5 to form a sheet (web, wet paper) 100 on the felt 5. In addition, although FIG. 1 illustrates a crescent former, the wet paper web can be formed by any of a round net type, a long net type (Ford Linear) type, a suction breast type, a short net type, and a twin wire type. good.

The web 100 formed between the wire 4 and the felt 5 is closely transferred to the Yankee dryer 8 by the pressure roll 7. Next, the web 100 is dried by the Yankee dryer 8 and the Yankee dryer hood 9 and further peeled off from the Yankee dryer 8 while being creped by the creping doctor 11, and taken up on the reel 14 through the guide roll 17 and the reel drum 13. It is done. The Yankee dryer 8 is a drum made of cast iron or cast steel for drying the web, and the outer diameter is generally 2.4 to 6 m.
Here, creping is a method in which a paper is mechanically compressed in the longitudinal direction (machine traveling direction) to form a wavy wrinkle called crepe, and the bulk (feeling of bulk), softness, water absorption on sanitary paper. Properties, surface smoothness, aesthetics (crepe shape) and the like. A crepe is formed by the creping doctor 11 due to the speed difference between the Yankee dryer 8 and the reel 14 (the reel speed is slower than the Yankee dryer). Although the characteristics of the crepe depend on the speed difference, if the basis weight of the base paper on the Yankee dryer 8 is 7 to 40 g / m ² , the basis weight on the reel 14 is approximately 9 to 50 g / m ² , The basis weight on the Yankee dryer 8 becomes larger.

The crepe rate based on the speed difference between the Yankee dryer 8 and the reel 14 is defined by the following equation.
Crepe rate (%) = 100 x (Yankee dryer speed (m / min)-reel speed (m / min)) ÷ reel speed (m / min)
The quality of the crepe and the operability of the creping are substantially determined by the crepe rate, and in the present invention, the crepe rate is preferably in the range of 10 to 50%.

Further, it is preferable to use the Yankee spray 10 for optimally performing the creping process. By applying a predetermined adhesive from the Yankee spray to the surface of the dryer 8 or the web 100, the web sticks to the Yankee dryer 8, and the creping doctor 11 can perform the creping treatment as described above.
As the component of the adhesive, polyamide polyamine resin (PA resin) typified by Herculis Kleptorol 190, polyamide amine epichlorohydrin (PAE resin) typified by Herculis Kymen 557H, cationic polyamide resin, Polyvinyl alcohol (PVA), polyamide plasticizer addition product, polyamide softener addition product, modified polyamidoamine, polyvinyl acetate and the like can be mentioned, and these can be used alone or in combination.
In addition, as a release agent for improving the peeling of the web 100 from the Yankee dryer 8, 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, silicone compound, dipropylene glycol, triethanolamine, polyoxyethylene fatty acid ester and the like can be used alone or in admixture of two or more.
In order to obtain an optimum creping treatment, the concentration of the adhesive and / or release agent can be adjusted as appropriate and sprayed onto the surface of the Yankee dryer 8.

When the water-soluble polyglycerin fatty acid ester is internally added to the base paper, the water-soluble polyglycerin fatty acid ester may be added to the papermaking raw material of the raw material tank 1. In the case of internal addition, since the water-soluble polyglycerin fatty acid ester is nonionic and the yield to the pulp fiber is slightly low, the addition immediately before the inlet is desirable. The amount of internal addition is preferably about 0.1 to 1% per dry fiber weight of the base paper.
When the water-soluble polyglycerin fatty acid ester is externally added to the base paper, a spray liquid containing the water-soluble polyglycerin fatty acid ester may be sprayed onto the sheet on the Yankee dryer 8 or the felt part 5 using a predetermined spray header. When spraying onto the sheet on the Yankee dryer 8, the above-mentioned adhesive and release agent are mixed with a spray solution, and the adhesive, release agent and spray solution are simultaneously applied to one spray header (usually Yankee spray 10 in FIG. 1). It can also be applied.
When a liquid containing a water-soluble polyglycerin fatty acid ester is sprayed on the sheet on the Yankee dryer 8, the upper limit is about 0.1 wt% per dry fiber weight of the base paper. When spraying on the sheet on the felt part 5, the amount of addition is arbitrary, but it causes stains due to transfer of the spray liquid to the felt and poor adhesion of the web to the Yankee dryer-8. It is preferable to limit the amount to 2 wt% or less per dry fiber weight.

As a method for applying the texture improving agent to the base paper, spraying by spraying or centrifugal spraying by rotor dampening (chemical coating device by WEKO, Germany, handled by Nikka) can be suitably applied.
The position where the texture improving agent is applied to the base paper is preferably immediately before the reel drum 13 on which the sanitary paper is wound, and the spray header 12 (or the rotor dampening device) disposed at this position is used for the application. it can.
FIG. 2 is a partially enlarged view from the guide roll 17 to the reel 14 in FIG. 1 when the spray header 12 is used. The spray header 12 is installed in the liquid reservoir 15 and applies a texture improving agent to one side of the web 100. Further, by providing a backup plate 20 (or backup roll) on the back side of the web 100, the texture improving agent can be collected by capturing the back of the texture improving agent, and the texture improving agent contacts the web 100 from the back side. Can be applied.
FIG. 3 is a schematic view of the spray header 12 along the width direction L of the web 100. As shown in FIG. 3, a plurality of spray headers 12 are arranged along the width direction L of the web 100, and two or more stages are arranged in a staggered manner before and after the traveling direction of the web 100 and applied to the web 100. Uniform application is possible. Even if the spray header 12 is slid in the width direction L of the web 100, uniform application is possible.
4 is a partially enlarged view from the guide roll 17 to the reel 14 in FIG. 1 when the rotor dampening 30 is used. In the example of FIG. 4, the web 100 that has passed through the guide roll 17 rises vertically by the roll 18, and in this state, the texture improving agent is sprayed by the rotor dampening 30.
The rotor dampening 30 has a configuration in which a plurality of conical rotors having a rotation axis in the vertical direction of FIG. 4 are arranged along the width direction of the web 100 (paper surface direction of FIG. 4). The texture-improving agent is sprayed from the opening.

  It goes without saying that the present invention is not limited to the above-described embodiments, and extends to various modifications and equivalents included in the spirit and scope of the present invention.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these examples of course.

<Example 1>
In the paper machine shown in Fig. 1, base paper 1 (tissue paper, basis weight 15.5g / m ² , NBKP 40wt%, LBKP 60wt% raw materials blended, wet paper strength enhancer (Arafix 255 made by Arakawa Chemical Co., Ltd.) 0.2 The following water-soluble polyglycerin fatty acid ester was sprayed on one side of the base paper sheet on felt part 5 at 0.49 wt% (component amount) per dry fiber weight of the base paper. After that, just before the reel drum 13, the following texture improver was applied to one side of the base paper (the side sprayed with the water-soluble polyglycerin fatty acid ester) at 9.8wt% (liquid amount) per dry fiber weight of the base paper, Obtained.
Water-soluble polyglycerin fatty acid ester: 25% by weight aqueous solution of polyglycerin monostearyl ester (Unigri GS-106, NOF Corporation) Texture improver: Di-cured tallow alkyldimethyl ammonium chloride (Nissan Cation 2ABT, NOF Corporation) An aqueous solution consisting of 10 wt%, glycerin 40 wt%, diglycerin 5 wt%, and purified water 45 wt% Note that the spray amount of the water-soluble polyglycerin fatty acid ester is prepared in advance by creating a calibration curve of the spray pressure and flow rate. The conversion coefficient was set by measuring the actual coating amount when the ester was applied alone to the base paper by hot water extraction. And in each Example and the comparative example, the spray amount of water-soluble polyglycerol fatty acid ester was computed from the spray pressure.
The coating amount of the texture improving agent was determined by actually measuring the coating amount of each example and comparative example by hot water extraction and toluene extraction, and subtracting the blank extraction amount.

<Example 2>
The amount of water-soluble polyglycerin fatty acid ester sprayed on one side of base paper 1 was changed to 0.95 wt% (component amount) per dry fiber weight of the base paper, and the coating amount of the texture improving agent was 15 wt per base paper dry fiber weight. Sanitary paper was obtained in the same manner as in Example 1 except that the percentage was changed to% (liquid amount).

<Example 3>
Using the paper machine shown in Fig. 1, paper 2 (toilet paper, 15.5 g / m ² basis weight, NBKP 40 wt%, LBKP 60 wt% raw material) is made, and the amount of water-soluble polyglycerin fatty acid ester sprayed on one side Example 1 with the exception of changing to 0.18 wt% (component amount) per dry fiber weight of the base paper and changing the coating amount of the texture improver to 3.9 wt% (liquid amount) per dry fiber weight of the base paper Sanitary paper was obtained in the same manner.

<Example 4>
The water-soluble polyglycerin fatty acid ester is changed to the following composition, and a spray liquid is prepared by mixing at a mass ratio of 1: 1 with the mixture of the adhesive and the release agent. 0.05 wt% (component amount) per dry fiber weight of the base paper 1 was sprayed on one side of the base paper. Further, a sanitary paper was obtained in the same manner as in Example 1 except that the texture improving agent was changed to the following composition and 11.0 wt% (liquid amount) was added per dry fiber weight of the base paper.
Water-soluble polyglycerol fatty acid ester: Polyglycerol lauryl ester (Poem L-021 manufactured by Riken Vitamin Co., Ltd.)
Texture improving agent: polyethylene glycol distearate (Unisafe NKL-9520, manufactured by NOF Corporation) 10 wt%, polyoxyethylene coconut fatty acid glyceryl (UNIGURI MK-230 manufactured by NOF Corporation) 10 wt%, glycerin 50 wt% , 10 wt% sorbitol and 20 wt% purified water Adhesive: Creptrol A6115 (manufactured by Riken Green)
Release agent: Santor FT (manufactured by Nikka Chemical)

<Example 5>
Sanitary paper was obtained in the same manner as in Example 1 except that the amount of water-soluble polyglycerin fatty acid ester sprayed on one side of the base paper 1 was changed to 0.09 wt% (component amount) per dry fiber weight of the base paper.

<Example 6>
Change the amount of water-soluble polyglycerin fatty acid ester sprayed on one side of the base paper 1 to 0.11 wt% (component amount) per dry fiber weight of the base paper, change the texture improver to the following composition, and the coating amount Sanitary paper was obtained in the same manner as in Example 1 except that was changed to 4.7 wt% (liquid amount) per dry fiber weight of the base paper.
Texture improver: Amino-modified silicone (X-52-2265 manufactured by Shin-Etsu Chemical Co., Ltd.) 5 wt%, glycerin 40 wt%, diglycerin 5 wt%, purified water 45 wt%

<Comparative Example 1>
Sanitary paper was obtained in the same manner as in Example 1 except that the water-soluble polyglycerin fatty acid ester was not sprayed on one side of the base paper 1.

<Comparative Example 2>
Except that water-soluble polyglycerin fatty acid ester is not sprayed on one side of the base paper, the texture improver is changed to the following composition, and the coating amount is changed to 5.4 wt% (liquid amount) per dry fiber weight of base paper 1. Obtained a sanitary paper in the same manner as in Example 1.
Texture improver: Amino-modified silicone (X-52-2265 manufactured by Shin-Etsu Chemical Co., Ltd.) 5 wt%, glycerin 40 wt%, diglycerin 5 wt%, purified water 45 wt%

<Comparative Example 3>
The same texture improving agent as in Example 1 was directly applied to one side of the same base paper 1 as in Example 1 offline (roll coater equipment) at 20.5 wt% (liquid amount) per dry fiber weight of the base paper.

<Measurement>
1. Basis weight The basis weight (g / m ² ) of the final sanitary paper was measured according to JIS P8124.
2. Thickness The final sanitary paper thickness (mm / 10 sheets) was measured with a Peacock dial gauge under a load of 40 g / cm ² .
3. Tensile strength The vertical load (gf / 25 mm) of the sanitary paper was measured according to JIS P8113 for the maximum load until breakage.
4). Water absorption The water absorption (sec) of sanitary paper was measured according to JIS S3104.

5). Hand feel The touch of the texture-improving agent on the sanitary paper was evaluated by five panelists. Evaluation was made in 5 grades (5: very good, 4: excellent, 3: normal, 2: slightly inferior, 1: inferior), and the average value of 5 people was used. If evaluation is 4.0 or more, the hand feel (feel improvement effect) is favorable.

  The obtained results are shown in Table 1.

As is apparent from Table 1, in each example, the hand feel (feel improvement effect) was excellent. In each example, since the water-soluble texture improving agent was applied after the water-soluble polyglycerin fatty acid ester was applied to the base paper, the texture improving effect was achieved even if the amount of the texture improving agent applied to the base paper was small. Was fully obtained.
In Example 2, the coating amount of the texture improving agent on the base paper was close to 15%, and the strength was slightly low, but it was a level that could be used sufficiently.
On the other hand, in the case of Comparative Examples 1 and 2 in which the water-soluble texture improving agent was applied without applying the water-soluble polyglycerin fatty acid ester to the base paper, the texture improving agent penetrated into the base paper, and the example texture improving effect Could not be obtained sufficiently.
Further, in the case of Comparative Example 3 in which the water-soluble polyglycerin fatty acid ester was not applied to the base paper and the water-soluble texture improving agent was applied in a large amount exceeding 15%, the texture improving effect was obtained. Was wasted and cost increased.
In addition, the blank in a table | surface shows evaluation of only a base paper.

5 Felt 8 Yankee dryer 13 Reel 100 Base paper

Claims (3)

Apply water-soluble polyglycerin fatty acid ester of HLB11 or more to one side of base paper for tissue paper or toilet paper,
A sanitary paper manufacturing method in which a texture improving agent containing a water-soluble softening agent and / or a water-soluble humectant is applied to the one side of the base paper,
The water-soluble softener comprises at least one selected from the group consisting of a surfactant containing an aliphatic group having 8 to 24 carbon atoms, a water-soluble organopolysiloxane, and a water-soluble derivative of the water-soluble organopolysiloxane,
The water-soluble humectant comprises at least one selected from the group of polyhydric alcohols, sugars, and amino acid compounds,
A method for producing sanitary paper, wherein the water-soluble polyglycerin fatty acid ester is sprayed on the one side of the base paper on a felt of a press part in the paper making process of the base paper or on a Yankee dryer that transfers the base paper from the felt.   The method for producing sanitary paper according to claim 1, wherein the texture improving agent is sprayed between reels that wind up the base paper from an outlet of the Yankee dryer.   The method for producing sanitary paper according to claim 2, wherein spraying of the texture improving agent is performed using spraying or rotor dampening.

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