JP6034004B2 - Toilet Paper - Google Patents

Description

  The present invention relates to toilet paper.

  Toilet papers currently used in the market are demanded for toilet papers that are not easily torn by moisture and have excellent moisture absorbability due to the widespread use of toilets with hot water washer. However, since priority is given to the comfort of warm water cleaning, moisture tends to remain during wiping, and there is a problem that it is difficult to obtain a firm wiping feeling.

Some recent toilet paper is impregnated with an aqueous lotion chemical (hereinafter also referred to as an aqueous lotion chemical) and embossed.
In this toilet paper, the surface unevenness by embossing enhances wiping and bulkiness (hand feeling, bulkiness), and also moisturizing (moist feeling), flexibility (soft feeling) by aqueous lotion chemicals, The smoothness of the surface (smoothness) is enhanced.

However, when it is impregnated with an aqueous lotion solution, it has excellent moisturizing properties (moist feeling), but after wiping more than non-moisturizing toilet paper, the skin may remain moist and may not feel dry. Some people feel that they are not wiped well. The toilet paper impregnated with the lotion chemical is inferior to the toilet paper without the aqueous lotion chemical in this respect.
In particular, such a decrease in wiping feeling due to a wet feeling becomes prominent in a high humidity environment such as during the rainy season and autumn rain in Japan.
Here, as a sheet that gives a light touch, it is known in cosmetic cotton using nonwoven fabric etc., but toilet paper requires water decomposability, so water decomposability is not considered and conversely non-water decomposability is considered. Basically, the basic use mode and properties are different from those of a cosmetic cotton designed with a non-woven fabric as a basis, and it is difficult to design in the same manner.

Japanese Patent Laid-Open No. 9-201227 JP 2009-45396 A JP 2008-297260 A JP 2006-169690 A

  Therefore, a main problem of the present invention is to provide a toilet paper that gives a dry feel to the skin after use in a shower toilet and has a firm wiping feeling.

The present invention that has solved the above problems and the effects thereof are as follows.
<Invention of Claim 1>
Two-ply toilet paper
The rice tsubo per ply is 12.0-30.0 g / m ² ,
Each ply is embossed, and both plies are bonded and laminated together via an adhesive applied to the top surface of the embossed protrusion of each emboss applied to each ply. Alginate is carried in the agent, and the adhesive contains at least one of ink, aqueous lotion chemical and softener,
The embossing has a surface area of 0.64 to 4.0 mm ² in a bottom view of an embossed recess having a top and bottom relationship with the top surface of the embossed convex portion, and an emboss density of the embossed recess is 2.0 to 32.0. pieces / cm ^2, the depth of the embossed depressions is a 0.5 to 1.5 mm, Toys and wherein the toilet paper.

<Invention of Claim 2>
3 ply toilet paper,
The rice tsubo per ply is 12.0-30.0 g / m ² ,
Embossing is given to each ply constituting the outer layer, and each ply of the outer layer is bonded to the middle layer ply via an adhesive applied to the top surface of the embossing convex portion of the embossing given to those plies. And an alginate is carried in the adhesive, and the adhesive contains at least one of ink, aqueous lotion liquid and softener,
The embossing has a surface area of 0.64 to 4.0 mm ² in a bottom view of an embossed recess having a top and bottom relationship with the top surface of the embossed convex portion, and an emboss density of the embossed recess is 2.0 to 32.0. pieces / cm ^2, the depth of the embossed depressions is a 0.5 to 1.5 mm, Toys and wherein the toilet paper.

<Invention of Claim 3 >
The toilet paper according to claim 1 or 2, wherein each ply constituting at least the outer layer is impregnated with an aqueous lotion chemical.

  According to the present invention described above, a toilet paper is provided that gives a dry feel to the skin after use in a shower toilet and has a firm wiping feeling.

It is a top view of the toilet paper concerning this invention. It is sectional drawing of the toilet paper concerning the 1st form of this invention. It is sectional drawing of the toilet paper concerning the 2nd form of this invention. It is a figure for demonstrating the example of the manufacturing method of the toilet paper which concerns on this invention.

Next, an embodiment of the present invention will be described in detail below with reference to FIGS.
The present invention is 2-ply or 3-ply toilet paper X1, and each ply is made of crepe paper S1 (S2). Also, the ply S1 constituting the outer layer has only one embossed recess 20A formed by pressing with a convex embossing roll on one surface, and only the embossed convex corresponding to the embossed recess 20A formed on the other surface. Single embossing is given, and each ply S1 (S2) is bonded and laminated integrally through the adhesive 10 given to the top surface 20t of the embossing convex part of the embossing 20 given to those plies S1. It has become. FIG. 1 shows a cross-sectional view of a two-ply configuration, and FIG. 2 shows a cross-sectional view of a three-ply. Note that the emboss 20 is not applied to the middle ply S2 in the case of 3 plies.

  And the toilet paper X1 of this invention has the alginate carry | supported in the said adhesive 10 characteristically. A solution containing alginate gives a dry feel when touched to the skin. Therefore, when the wiping operation is performed after washing in the shower toilet using the toilet paper X1 of the present invention, moisture from the shower toilet adhering to the skin is absorbed by the toilet paper X1 and the adhesive 10 The alginate melts and dissolves on the surface of the toilet paper. This touches the skin and gives it a dry feel.

  Here, in the toilet paper X1 of the present invention, the alginate is supported in the adhesive 10, but since a relatively high concentration of alginate is necessary to obtain this effect, the crepe paper S1 (S2) is used as it is. ) It is not preferable to apply to the whole because there are problems such as contamination of the printing plate. Alginate is contained in the adhesive 10 having a relatively high viscosity, and the adhesive 10 is located only at the top 20t of the embossed convex portion, thereby solving such a problem in manufacturing.

  Here, examples of the alginate according to the present invention include sodium alginate, ammonium alginate, and potassium alginate. The content of the alginate in the adhesive is desirably 0.1 to 20% by mass, more preferably 2.0 to 15% by mass in terms of solid content concentration. The total amount of the adhesive used is preferably 1.0 to 20.0 mass% per paper mass. Within this range, the adhesive force required for ply adhesion can be secured, and a dull feel with alginate can be sufficiently obtained.

In addition, as the adhesive 10, water-soluble inks containing rhenium in addition to water-soluble adhesives such as polyvinyl alcohol, CMC, and starch can be used. Further, a high concentration alginate aqueous solution can be used as an adhesive.
Moreover, the adhesive 10 can be embossed with a design by adding ink containing dyes or pigments. The ink in the present invention is a flexographic ink, containing 0.5 to 17% by mass of pigment, 25.2 to 27% by mass of resin (including a dispersant), and 56 to 74.3% by mass of water. , Diluted with resuum and adjusted in viscosity. Although the mechanism for improving the wiping feeling by blending the ink is not clear, it is considered that the alginate in the adhesive can be appropriately eluted by water or a dispersant in the ink component. Further, an aqueous lotion agent and a softening agent can be mixed into the adhesive 10 within a range that does not hinder the adhesion between the plies, and softness and smoothness can be given to the embossed adhesive portion. As the softening agent, any of cationic, anionic, amphoteric and nonionic surfactants can be used.

Here, as the raw material pulp of the crepe paper S1 (S2) constituting the ply S1 (S2) of the toilet paper X1 of the present invention, known pulps can be used, for example, wood pulp, waste paper pulp and the like.
In particular, the raw material pulp is preferably a blend of NBKP (conifer kraft pulp) and LBKP (hardwood kraft pulp). Waste paper pulp may be blended as appropriate, but in terms of texture and the like, it is preferably composed only of NBKP and LBKP. In this case, the blending ratio is NBKP: LBKP = 10: 90 to 50:50. In particular, NBKP: LBKP = 40: 60 is particularly desirable.
Papermaking raw materials such as raw material pulp are made into crepe paper through, for example, a known papermaking process, specifically, a wire part, a press part, a dryer part, a size press, a calendar part, and the like. In papermaking, for example, an appropriate chemical such as a dispersant, a pH adjuster such as caustic soda, an antifoaming agent, a preservative, and a slime control agent can be added.

The basis weight of the crepe paper S1 (S2) is such that the embossed shape is reliably maintained and the elution of the alginate is ensured, and the basis weight measured by JIS P 8124 is 12.0 to 12.0 ply. 30.0 g / m ² is desirable. When the rice tsubo is less than 12.0 g / m ² , the feeling of thickness disappears after embossing or the paper is easily cut. When the weight per square meter is more than 30.0 g / m ² , the feeling of use deteriorates, the water disintegration property deteriorates, and further, the elution of the alginate becomes difficult to reduce the effect of the present invention.
The paper thickness of the crepe paper S1 (S2) is measured by a dial thickness gauge (peacock paper thickness gauge), and is preferably 180 to 280 μm for 2 plies and 230 to 330 μm for 3 plies. If the paper thickness is less than a predetermined thickness, the product may have insufficient thickness, or the paper may be easily stretched and the lamination and integration with the adhesive may be insufficient. In addition, if the paper thickness exceeds a predetermined thickness, the feeling of use becomes worse.

On the other hand, as described above, in the toilet paper X1 of the present invention, the emboss 20 is applied to the ply S1 constituting the outer layer (both plies in the case of two plies).
By applying this emboss 10 and applying an adhesive to the top surface 20t of the convex portion and supporting the alginate there, the alginate can be provided in an appropriate amount and the alginate is surely eluted. In addition, the embossed concave part eliminates excessive adhesion to the skin when wiping with toilet paper, increases the feeling of lightness, and also improves the embossed peculiar bulk and excrement scraping ability. Be made.

Here, a preferred embossing mode will be described. First, the area of the bottom 22 of one embossed recess 20A in a plan view is 0.64 to 4.0 mm ² , and the emboss density of the embossed recess 20A is 2.0 to 2.0. 32.0 / cm ² is desirable.
Here, the bottom portion 22 of the embossed recess 20A has a front-back relationship with the top surface 20t of the embossed convex portion to which the adhesive 10 is applied, and therefore the size of the bottom portion 22 is less than 0.64 mm ^2. Then, the application of the adhesive 10 is not sufficient and the ply is easily peeled off, and it is difficult to make the amount of the alginate to be applied sufficient. Further, the toilet paper X1 obtained does not have enough scraping of excrement by the emboss 20 so that the improvement in wiping property is small. On the other hand, if it exceeds 4.0 mm ² , the bulk of the toilet paper X1 becomes difficult to express. At the same time, if the emboss density is less than 2.0 pieces / cm ² , it becomes difficult to exhibit the effect of wiping and the bulkiness of the toilet paper X1 by the emboss 20 and it is possible to give a sufficient amount of alginate. It becomes difficult. On the other hand, if it is more than 32 pieces / cm ² , the adhesive application area is too large and it is hard and water disintegration is lowered.
The depth of the embossed recess 20A is preferably 0.5 to 1.5 mm. If it is less than 0.5 mm, it will be difficult to express bulkiness. If it exceeds 1.5 mm, it is difficult to elute the alginate.

Here, in the present invention, it is desirable that the embossed recesses 20A be arranged regularly and vertically and horizontally on the paper surface as in the illustrated example. The embossed recesses 20A are arranged evenly, and the effect of embossing and the effect of elution of alginate are exhibited on the entire paper surface.
Here, the shape of the bottom 22 of the embossed recess 20A is not particularly limited, but is preferably a circle, an ellipse, a quadrangle, or a square. In addition, the shape of the bottom part 22 of the embossing recessed part 20A here corresponds with the shape from having the top surface and front and back of an embossing convex part as mentioned above. Particularly preferred is a chamfered square, and a chamfered square is particularly desirable. When the square shape is square, the embossing is not easily crushed and the bulkiness is easily developed, and the excrement is easily scraped off during wiping, and the surface is smooth. Further, the absence of corners leads to excellent water diffusibility, and the solution containing alginate is likely to diffuse on the paper surface. Note that the overall shape (plan view shape) of the embossed recess 20A is preferably similar to the bottom shape (plan view shape), but this is not necessarily so. The area of the embossed recess in plan view is preferably approximately 1.1 to 2.0 times the area of the bottom plane.

  The pitch (separation interval) L1 between the embossed recesses 20A is preferably 3.0 to 5.0 mm. When the numerical range is based on the configuration of the emboss 20, the smoothness and the design are excellent. Moreover, there is no feeling of thickness and bulkiness is not obtained as it is less than 3.0 mm. On the other hand, if it exceeds 5.0 mm, the possibility of breaking during embossing between the embossed convex portions 1 is extremely increased, resulting in poor productivity. The pitch is the distance between the center of the bottom 22 or the center of gravity of the bottom 22 of the embossed recess 20A.

  Here, the toilet paper X1 according to the present invention has water decomposability. Specifically, the water disintegration value is desirably 5 to 20 seconds. In addition, the water disintegration here is represented by the number of seconds in the unraveling test (based on the unraveling test method defined in JIS P 4501). When the water disintegration value is less than 5 seconds, when used in a shower toilet or the like, the risk of the loose crepe paper adhering to the skin increases when a wiping operation is performed. In addition, this numerical value of 5 to 20 seconds of water decomposability is extremely high water decomposability. In the present invention, it is possible to achieve such water decomposability despite sufficient wiping in a shower toilet or the like due to the characteristic embossing of the present invention.

On the other hand, the toilet paper X1 according to the present invention can be impregnated with a water-based lotion chemical for improving softness and smoothness. In this case, the application amount of the aqueous lotion chemical solution is 1.0 to 6.5 g / m ² , preferably 2.0 to 5.0 g / m ² , more preferably 2.5 regardless of the number of plies. ˜4.5 g / m ² . If it exceeds 6.5 g / m ² , the paper may be cut due to a decrease in paper strength or elongation, or even if alginate is added, the stickiness may be too high in quality. If it is less than 1.0 g / m ² , the quality difference from the uncoated product such as smoothness and moistness cannot be felt. More preferably, 2.5 to 4.5 g / m ² is extremely excellent in sensory evaluation such as a feeling of softness and a feeling of smoothness. In particular, in the case of 2 to 3 plies, the effect of chemical solution impregnation is sufficiently and reliably exhibited.

  The aqueous lotion chemical solution according to the present invention in this case contains water and a polyol. When it is an aqueous lotion chemical, the effects of the present invention such as improved paper breakage are more clearly exhibited. In particular, an aqueous lotion chemical solution containing 70 to 90% by mass of glycerin as a polyol, and an aqueous lotion chemical solution further containing 1 to 15% of moisture and 0.01 to 22% by mass of functional chemicals are desirable. More preferably, the water content is 5 to 10% by mass. The water content in the chemical solution can be measured by the Karl Fischer method. Further, the viscosity of the chemical at the time of application is desirably 50 to 300 mPa · s. If the viscosity of the chemical solution is less than 50 mPa · s, the lotion chemical solution in the sheet penetrates quickly between fine fibers, and the desired embossed shape is easily lost. If the chemical viscosity is more than 300 mPa · s, the lotion chemical in the sheet is difficult to penetrate between fine fibers, and the planar uniformity and the touch are lost.

  Examples of the functional agent include surfactants, inorganic and organic fine particle powders, and oily components. The surfactant has an effect of giving the tissue more flexibility and smoothing the surface, and an anionic surfactant, a cationic surfactant, a zwitterionic surfactant and a nonionic surfactant are applied. Inorganic and organic fine particle powders have a smooth surface. The oil component has a function of improving lubricity, and higher alcohols such as liquid paraffin, cetanol, stearyl alcohol, and oleyl alcohol can be used.

As a functional agent, any one or more of a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc. can be arbitrarily selected as a drug that maintains the moisture retention of glycerin. A moisturizer such as a combination of the above can be added.
As functional agents, emollients such as fragrances and various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids, etc. An odorant can be appropriately blended. Furthermore, you may contain the antioxidant of vitamin C and vitamin E. The component contained in the chemical solution is a component that dissolves easily in water or is modified and blended into a form that dissolves easily.

  In the toilet paper X1 according to the present invention described in detail above, a clean feeling is obtained when a wiping operation is performed, particularly after washing the excretory part or the like with a shower toilet, and a firm wiping feeling is obtained. .

Next, a manufacturing example of the toilet paper X1 of the present invention will be described with reference to FIG.
Toilet paper X1 according to the present invention prepares two raw rolls R1 wound with crepe paper, and feeds continuous crepe paper S1'S1 'from them. The fed continuous crepe paper S1 ′, S1 ′ is given a single emboss through an embossing means 6 composed of a convex embossing roll 60 having a desired embossing pattern on the surface and a rubber receiving roll 61. . At this time, in the manufacture of the toilet paper X1 according to the present invention, after embossing is given between the convex embossing roll 60 and the receiving roll 61, it is wound around the convex embossing roll 60 and guided and guided to the subsequent stage. Then, an adhesive containing an alginate is applied to the top surface of the embossed convex portion by the doctor chamber type flexographic printing machine 5 while being wound around the convex embossed roll.

And each continuous crepe paper S1 ', S1' to which the embossed | fed out from each original fabric roll R1, R1 was provided and the paste containing an alginate was provided to the top surface of the embossing convex part is made into the said top surface. Laminate means 7 is laminated so that they face each other, and is further wound up by a take-up means to produce a base paper of toilet paper X1 of the present invention. Examples of the laminated form include a so-called Tip to Tip form and a nested form.
And the base paper manufactured in that way is processed into the form of a toilet roll etc. using equipments, such as a well-known winder of the latter stage, and it is set as a product.

In the form shown in FIG. 4, the adhesive is applied to the top surfaces of the embossed convex portions of both continuous sheets S1 ′ and S1 ′ fed out from the raw fabric rolls R1 and R1. If it is paper X1, you may provide an adhesive only to one continuous sheet S1 '.
When manufacturing the three-ply toilet paper X1, the continuous crepe paper constituting the middle layer is unwound from the raw roll and embossed and bonded to the continuous crepe papers S1 ′ and S1 ′ constituting the outer layer. After applying the agent, the lamination means 7 may be laminated and integrated so as to be interposed between them.

〔Example〕
Then, embodiments according to the present invention, since the evaluation of Comparative Example及beauty Reference Example Table 1 with the physical properties and composition according to the results in each example are shown in Table 2.
Table 1 shows an evaluation with a 2-ply product, and Table 2 shows an evaluation with a 3-ply product.
Evaluation was performed by using the toilet paper according to each example by 23 subjects (8 men, 15 women), wiping after shower washing, and performing sensory evaluation.

<Evaluation method>
The sensory evaluations of “soft feel”, “wiping feeling”, “softness”, “moist feeling”, and “smoothness” are based on toilet paper that does not use uncoated alginate, and “very good” “5”, “slightly good” is “4”, the standard is equivalent to the standard or the difference is unknown, “3”, “slightly inferior” is “2”, “slightly inferior” is “1” . The average of the evaluation of each item by the 23 people is listed in the table.

<Measurement method of tensile strength / elongation>
The tensile strength is measured by the method specified in JISP8113, and the elongation is the tensile elongation at break described in the definition e) of JISP8113.

  As understood from the results of Tables 1 and 2, in the present invention, it is possible to obtain a feeling that excessive moisture on the skin can be wiped off.

  X1 ... toilet paper, 20 ... embossed, 20A ... embossed recess, 22 ... bottom of embossed recess, 20t ... top surface of embossed raised part, 10 ... adhesive, S1 ... outer layer ply (crepe paper constituting outer layer), S2 ... Middle layer ply (crepe paper constituting the middle layer), S1 '... continuous crepe paper constituting the outer layer, 5 ... adhesive application means (doctor chamber type flexographic printing), R1 ... raw roll, 6 ... embossing means, 60 ... Convex embossing roll, 61... Receiving roll, 7.

Claims (3)

Two-ply toilet paper
The rice tsubo per ply is 12.0-30.0 g / m ² ,
Each ply is embossed, and both plies are bonded and laminated together via an adhesive applied to the top surface of the embossed protrusion of each emboss applied to each ply. Alginate is carried in the agent, and the adhesive contains at least one of ink, aqueous lotion chemical and softener,
The embossing has a surface area of 0.64 to 4.0 mm ² in a bottom view of an embossed recess having a top and bottom relationship with the top surface of the embossed convex portion, and an emboss density of the embossed recess is 2.0 to 32.0. pieces / cm ^2, the depth of the embossed depressions is a 0.5 to 1.5 mm, Toys and wherein the toilet paper. 3 ply toilet paper,
The rice tsubo per ply is 12.0-30.0 g / m ² ,
Embossing is given to each ply constituting the outer layer, and each ply of the outer layer is bonded to the middle layer ply via an adhesive applied to the top surface of the embossing convex portion of the embossing given to those plies. And an alginate is carried in the adhesive, and the adhesive contains at least one of ink, aqueous lotion liquid and softener,
The embossing has a surface area of 0.64 to 4.0 mm ² in a bottom view of an embossed recess having a top and bottom relationship with the top surface of the embossed convex portion, and an emboss density of the embossed recess is 2.0 to 32.0. pieces / cm ^2, the depth of the embossed depressions is a 0.5 to 1.5 mm, Toys and wherein the toilet paper. The toilet paper according to claim 1 or 2, wherein each ply constituting at least the outer layer is impregnated with an aqueous lotion chemical.

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