JP7084717B2 - Toilet Paper - Google Patents

Description

The present invention relates to toilet paper. In particular, it relates to toilet paper used for cleaning the human body after excretion and wiping other than the human body.

Toilet paper is mainly used for cleaning after excretion, but other uses vary depending on the region, region or country. In addition to toilet paper products that are used exclusively for cleaning after excretion, highly versatile wipes that are often used for facial purposes such as nose-blowing and for wiping various items and tables other than the human body. Some are also used as a substitute for paper.

While it is important that this type of toilet paper is not easily torn as a general-purpose tissue paper that is frequently used, it is also used for cleaning after excretion, so softness and fluffiness are also required. Furthermore, it is required to be hydrolyzable on the assumption that it will be disposed of in a flush toilet.

However, toilet paper, which has a strong substitute for tissue paper, is thick and hard in order to increase the resistance to tearing, and is inferior to the special product in terms of texture.

JP-A-2017-169681

Therefore, a main object of the present invention is to provide a toilet paper having excellent versatility such as wiping use for articles other than cleaning use after excretion, and also having excellent texture.

The means for solving the above problems are as follows.

The first means is
3 or 4 ply toilet paper
Toilet paper with a winding hardness of 0.55 to 1.17 kgf.
The basis weight per ply of toilet paper is 14.9 g / m ² or more and 16.2 g / m ² or less, and the overall paper thickness is 297 μm or more and 435 μm or less.
The fiber material is composed of NBKP and LBKP, and the ratio (NBKP / LBKP) is 50/50 to 30/70, and no moisturizer is applied.
Embossing with a flat top surface on one side, an area of the top surface of 0.50 to 2.50 mm ² , and an embossing recess depth of 0.05 to 0.50 mm, and an embossing area of 5 to 20 in total 5 to 30 pieces were formed per 10 mm square so as to be%.
Dry tensile strength length is 451 cN / 25 mm or more and 1001 cN / 25 mm or less, and
The toilet paper is characterized in that the ratio of the lateral wet tensile strength to the lateral dry tensile strength is 0.09 or more.

The second means is the toilet paper of the first means having a water absorption rate of 2.4 seconds or less .

The third means is the toilet paper according to the first means, which has a water solubility of 36 seconds or less.

According to the present invention, there is provided a toilet paper that has strength that is excellent in versatility such as wiping of articles other than those used for cleaning after excretion, and is also excellent in touch to the skin.

It is a perspective view of the toilet roll which concerns on this embodiment. It is a figure which shows the measuring apparatus of MMD.

The toilet paper according to the present embodiment is, for example, in the form of a roll-shaped toilet roll formed in a long strip shape and wound around a paper tube. In the form of a toilet roll, the width L1 is 101 to 106 mm, the diameter L2 is 100 to 117 mm, the winding length (total length of toilet paper) is 20 to 30 m, and the paper tube inner diameter L3 is 35. It is preferably about 50 mm. If it is this size, a general toilet roll paper holder can be used, and it is easy to use for cleaning after excretion in the toilet space, and the length of the toilet paper is also for cleaning after excretion. , It is long enough to be used for general purposes such as tissue paper.

The toilet paper according to the present invention is a non-applied moisturizer to which a moisturizer is not substantially added by coating or the like. Moisturizing agents as external additives include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol and polyethylene glycol, and sugars such as sorbitol, glucose, xylitol, maltitol, maltitol, mannitol and trehalose. A polyol can be exemplified. However, it cannot be denied that the above-mentioned components are contained as long as the effect is not worthy of being a moisturizing toilet paper. If a moisturizer is applied, it becomes difficult to secure the strength. However, a softening agent or a softening moisturizer that determines the softness and paper strength of the base paper itself to be added at the time of papermaking may be added. Examples of the softener include fatty acid ester compounds and fatty acid amide compounds. Among these, fatty acid amide compounds have the effect of coating the fiber surface.

The toilet paper according to this embodiment is 3-ply or 4-ply. That is, three sheets are stacked to form a set, or four sheets are stacked to form a set. By using a multi-ply structure such as 3-ply or 4-ply, it is possible to increase the overall paper thickness while thinning each ply, and in particular, it enhances the texture such as "softness" and "softness" and makes it difficult to tear. be able to. In addition, when it is 2 plies, it is difficult to develop a feeling of thickness, and it is easy to feel a weakness in the difficulty of tearing when it is used as a general-purpose product for cleaning an article. In addition, when the number of plies is 5 or more, even if each ply is thinned, it becomes difficult to feel the softness when cleaning the skin as a whole, and it becomes difficult to develop a good texture, and if each ply is made too thin, it is easily torn. Become. Further, especially in the case of 5 plies or more, when embossing is applied, a strong sense of rigidity is felt. The toilet paper according to the present embodiment has the following characteristics in either 3-ply or 4-ply, so that it is not easily torn and is excellent in texture.

The toilet paper according to the present embodiment is 3-ply or 4-ply, and all of the following basis weight, paper thickness, vertical dry tensile strength and horizontal wet tensile strength to lateral dry tensile strength are all. When satisfied, it becomes resistant to tearing and feels good on the skin.

The toilet paper according to the present embodiment has a basis weight of 14.9 g / m ² or more and 16.2 g / m ² or less per ply. If the basis weight of 1 ply is within this range, it is possible to obtain sufficient resistance to tearing and good texture in the case of the above 3 or 4 plies, and it becomes easy to develop hydrolyzability.

The toilet paper according to the present embodiment has a 3-ply or 4-ply paper thickness of 297 μm or more and 435 μm or less as a whole. If the paper thickness is within this range, it is possible to secure sufficient resistance to tearing when the above-mentioned basis weight is 3 or 4 plies, and it is possible to further improve the texture and particularly the softness.

The basis weight according to the present invention is based on the basis weight measuring method of JIS P 8124 (1998). The paper thickness is measured by sufficiently adjusting the humidity of the test piece under the conditions of JIS P 8111 (1998) and then using the dial thickness gauge (thickness measuring instrument) "PEACOCK G type" (manufactured by Ozaki Seisakusho) under the same conditions. The value is set. Specifically, make sure that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to set the zero point, and then set the zero point. , Raise the plunger, place the test piece on the measuring table, slowly lower the plunger and read the gauge at that time. At the time of measurement, care should be taken so that the terminal of the metal plunger (a circular plane having a diameter of 10 mm) hits the paper plane perpendicularly. The load at the time of measuring the paper thickness is about 70 gf.

The toilet paper according to this embodiment has a dry tensile strength in the vertical direction of 451 cN / 25 mm or more and 1001 cN / 25 mm or less. This dry tensile strength is a very high value as compared with the wipe-only product after excretion. First, the toilet paper of the present embodiment has such a high dry tensile strength, so that it is not sufficiently torn when used for general purposes. Further, when the dry tensile strength in the vertical direction is high, the smoothness of the skin is likely to be exhibited.

In the toilet paper of the present embodiment, the ratio of the lateral wet tensile strength to the lateral dry tensile strength is 0.09 or more. This is a higher value than the conventional product. Here, in particular, "horizontal dry tensile strength" is said to have an effect on the overall "feeling of the skin" sensuality, not on the individual sensuality such as "softness" and "fluffy feeling". When the tissue paper is evaluated only by the comprehensive evaluation criteria of "feeling on the skin" after letting the subject freely touch the sample, instead of the specific evaluation criteria such as "softness" and "softness". It has been found that there is a certain correlation between the evaluation of "feeling on the skin" and "dry strength in the lateral direction". The dry tensile strength in the lateral direction is preferably 180 cN / 25 mm or more and 395 cN / 25 mm or less. On the other hand, the wet paper force in the lateral direction tends to show the weakest value among the indexes indicating the strength of the paper. When the wet paper force in the lateral direction is high, the durability of wiping in a wet state and the sense of security when wiping after using a so-called shower / toilet are excellent. The toilet roll according to the present embodiment has a high ratio of the lateral wet tensile strength to the lateral dry tensile strength of 0.09 or more. In other words, it has an excellent balance between texture and toughness. Here, regarding the wet tensile strength in the lateral direction, it is necessary that the wet tensile strength is not torn in actual use such as for cleaning after excretion in the toilet space, and that there is a sense of security when wiping, so that it is 25 cN / 25 mm or more. It is desirable that it is 40 cN / 25 mm or less. In this range, when the ratio of the wet tensile strength lateral to the dry tensile strength lateral is 0.09 or more, it is very preferable to secure the softness at the time of use.

The vertical direction of the paper is also called the MD direction, and is the flow direction at the time of papermaking. The horizontal direction of the paper is also called the CD direction, and is a direction orthogonal to the flow direction (MD direction) at the time of papermaking. The dry tensile strength according to the present invention is a value measured based on JIS P 8113 (2006), and is measured as follows. The test piece used is cut to a width of 25 mm (± 0.5 mm) x a length of about 150 mm in both the vertical and horizontal directions. The test piece is measured with multiple plies. As the testing machine, a load cell tensile testing machine TG-200N manufactured by Minebea Co., Ltd. and an equivalent machine equivalent thereto are used. The gripping interval is set to 100 mm, and the tensile speed is set to 100 mm / min. The measurement is performed by tightening both ends of the test piece to the grip of the testing machine, applying a tensile load to the paper piece in the vertical direction, and reading the indicated value (digital value) when the paper breaks. Five sets of samples are prepared in each of the vertical and horizontal directions, and measurements are taken 5 times each, and the average of the measured values is taken as the dry tensile strength in each direction. The dry tensile strength of the product was measured by stacking multiple sheets according to the number of plies of the product. For the base paper, the dry tensile strength was measured by stacking multiple sheets according to the number of plies of the product.

The wet tensile strength is a value measured based on JIS P 8135 (1998), and is measured as follows. The test piece used is cut to a width of 25 mm (± 0.5 mm) x a length of about 150 mm in both the vertical and horizontal directions. In the case of multiple plies, the tissue paper is measured with multiple plies. As the testing machine, a load cell tensile testing machine TG-200N manufactured by Minebea Co., Ltd. and an equivalent machine equivalent thereto are used. The gripping interval is set to 100 mm, and the tensile speed is set to 50 mm / min. As the test piece, a test piece that has been cured in a dryer at 105 ° C. for 10 minutes is used. After tightening both ends of the test piece to the grip of the testing machine, use a flat brush soaked in water to apply water horizontally to the center of the test piece with a width of about 10 mm, and then immediately move it up and down with respect to the piece of paper. The measurement is performed by applying a tensile load to the paper and reading the indicated value (digital value) when the paper breaks. Five sets of samples are prepared in each of the vertical and horizontal directions and measured five times each, and the average of the measured values is taken as the wet tensile strength in each direction. As for the wet tensile strength, the wet tensile strength was measured by stacking a plurality of sheets according to the number of plies of the product.

In the toilet paper of the present embodiment, it is desirable that the value of MMD, which is an index showing the surface property, is 6.6 or more and 10.3 or less. If the MMD is less than 6.6, the surface slips too much and the wiping property is deteriorated, and if it is more than 10.3, the texture is poor and it may not be suitable for use as toilet paper. For the measurement of MMD, the measuring device 100 shown in FIG. 2 is used, and the contact surface of the friction element is brought into contact with the surface of the measurement sample to which a tension of 20 g / cm is applied in a predetermined direction with a contact pressure of 25 g. , Move 2 cm at a speed of 0.1 cm / s in the same direction as the tension is applied, and use the friction tester KES-SE (manufactured by Kato Tech Co., Ltd.) or its equivalent to set the friction coefficient at this time. To measure. The value obtained by dividing the coefficient of friction by the friction distance (moving distance = 2 cm) is MMD. The friction element shall have 20 piano wires P having a diameter of 0.5 mm adjacent to each other and having a contact surface formed so as to have a length and a width of 10 mm. It is assumed that a unit bulging portion having a tip formed by 20 piano wires P (radius of curvature 0.25 mm) is formed on the contact surface.

The toilet paper of the present embodiment preferably has a softness of 1.8 cN / 100 mm or more and 3.5 cN / 100 mm or less. Softness is one of the indicators of softness, which is said to be softer as its value is lower. If it is tissue paper or toilet paper, it is considered to be sufficiently soft if it is 1.0 cN / 100 mm or less. The measurement of softness refers to a value measured based on the handle ometer method according to the JIS L 1096 E method (1990). However, the size of the test piece shall be 100 mm × 100 mm, and the clearance shall be 5 mm. Measure 5 times each in the vertical and horizontal directions with 1 ply, and use the average value of all 10 times. The softness is unitless, but considering the size of the test piece, cN / It may be expressed in units of 100 mm.

The raw material pulp for toilet paper, that is, the fiber material that constitutes toilet paper, is mechanical pulp such as ground wood pulp (GP), pressure-rised ground wood pulp (PGW), and thermomechanical pulp (TMP); semi-chemical pulp (CP). ), High yield unbleached kraft pulp of coniferous tree (HNKP), bleached kraft pulp of coniferous tree (NBKP), unbleached kraft pulp of broadleaf tree (LUKP), bleached kraft pulp of broadleaf tree (LBKP); Examples thereof include used paper pulp such as pulp (WP). It may contain fibers other than pulp.

Pulp can be used by selecting one kind or two or more kinds. Preferably, chemical pulp containing no filler or foreign matter is preferable. In particular, those containing more LBKP (also referred to as L material or hardwood pulp) than NBKP (also referred to as N material or softwood pulp) are used. That is, chemical pulp having a ratio of NBKP to LBKP (NBKP / LBKP) of 50/50 to 30/70 is suitable. Since the fiber thickness of NBKP is thicker than that of LBKP, the larger the amount of NBKP, the bulkier it is. Further, the raw material pulp may contain woody plants such as straw pulp, bamboo pulp and kenaf pulp, and herbs. Further, although recycled paper pulp may be blended, it is extremely desirable that the recycled paper pulp is composed only of NBKP and LBKP of virgin pulp because it is difficult to develop "softness".

On the other hand, as fibers other than pulp, polyethylene terephthalate, polybutylene terephthalate, polyester fibers such as copolymers thereof, polyolefin fibers such as polyethylene, polypropylene, and polystyrene, acrylic fibers such as polyacrylonitrile, and acrylic fibers such as modacryl, Polyamide-based fibers such as nylon 6, nylon 66, and nylon 12, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, synthetic fibers such as urethane fibers, triacetate fibers, semi-synthetic fibers such as diacetate fibers, and visco rayon. , Copper ammonia rayon, polynosic rayon, regenerated cellulose fiber such as lyocell, and chemical fiber such as regenerated fiber spun from a solution of collagen, alginic acid, chitinous substance, etc. can be contained. The polymer constituting the chemical fiber may be in the form of a homopolymer, a modified polymer, a blend, a copolymer or the like.

On the other hand, it is desirable that the toilet paper of the present embodiment has a water absorption rate of 2.4 seconds or less . Moisture can be quickly absorbed when wiping spilled water when the water absorption rate is 2.4 seconds or less , or when wiping after using a so-called shower toilet. In addition, it can be easily used for wiping articles other than those used for cleaning after excretion, that is, for cleaning the edges of washbasins and toilets, and for removing dust on tables and floors. Further, when the toilet paper is made into a roll-shaped product, the end portion of the roll called the tail is fixed with the tail glue in the manufacturing process, but the tail glue permeates quickly and the tail portion is covered. Stable fastening will be possible. The water absorption rate is measured according to the old JIS S 3104 (1985). For the water absorption test, use a pipette adjusted so that one drop to be dropped is about 0.1 mL, and test pieces (a set of multiple sheets stacked) on a support base with a hole with a diameter of 40 mm or more in the center. And drop 1 drop of distilled water at a temperature of 20 ± 1 ° C. from a height of 10 mm. The time from when the water droplet comes into contact with the test piece until it is completely absorbed and the reflected light disappears is measured in units of 0.1 seconds. The test is performed 5 times and the average is used for judgment.

Further, it is desirable that the toilet paper of the present embodiment has a water solubility of 36 seconds or less. If the water solubility is within 36 seconds, the risk of clogging the pipes when running water is disposed of in a flush toilet or the like is further reduced. This water solubility (easiness of loosening) is measured by JIS P 4501 (1993). For the looseness test, a 300 mL beaker containing 300 mL of water (water temperature 20 ± 5 ° C.) is placed on a magnetic stirrer, and the rotation speed of the rotor is adjusted to 600 ± 10 rotations / minute. Insert a test piece with a side of 114 ± 2 mm square into it and press the stopwatch. The rotation speed of the rotor once drops to about 500 rotations due to the resistance of the test piece, and the rotation speed increases as the test piece is loosened. When this rotation speed recovers to 540 rotations, the stopwatch is stopped and the time is measured in units of 1 second. The result of easiness of unraveling is expressed by the average of 5 tests. The rotor has a disk shape with a diameter of 35 mm and a thickness of 12 mm.

In the toilet paper of the present embodiment, it is desirable that the dry tensile strength and the wet tensile strength can be easily adjusted by adding a dry paper strength enhancer or a wet paper strength enhancer to the paper material or the wet paper. , Ply number, pulp type, pulp blending ratio, etc. may be adjusted by a method that does not use a paper strength agent. The wet paper strength enhancer tends to balance wet paper strength and water solubility.

Examples of the dry paper strength enhancer include starch, polyacrylamide, CMC (carboxymethyl cellulose) or a salt thereof, sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, zinc carboxymethyl cellulose and the like. When a dry paper strength enhancer is added internally, it may be added to the pulp slurry in an amount of about 1.0 kg / pulp t or less.

Examples of the wet paper strength enhancer include polyamide polyamine epichlorohydrin resin, urea resin, acid colloid / melamine resin, and heat-crosslinkable coated PAM. When a wet paper strength agent is used, a temporary wet paper strength agent (transient wet paper strength agent) is more desirable. In particular, a cationic temporary wetting agent is desirable. Temporary wetting strength agents essentially maintain the strength of the paper immediately after contact with water, but then quickly reduce the wetting strength of the paper. Therefore, the surface will not be roughened or torn by the amount of water when wiping off the water, and it will have excellent versatility, especially the strength for wiping off water that is generally used, and it will also be excellent on the skin. It can be disintegrated by a large amount of water at the time of disposal, for example, a stream of water in a flush toilet. Examples of the temporary wetting agent include TS-20 manufactured by Seikou PMC Co., Ltd., polymer aldehyde-functional compounds such as glyoxylated polyacrylamide and cationic glyoxylated polyacrylamide, and modification with glioxal divalent aldehyde. Examples thereof include a copolymer of the above-mentioned acrylamide monomer and another copolymerizable unsaturated monomer, dialdehyde starch, and the like. You may use multiple kinds of these. When the wet paper strength enhancer is added, the content in the paper is about 0.5 to 20.0 kg / pulp t. The preferred content is 1.0 to 12.0 kg / pulp t. A more preferable content is 4.0 to 8.0 kg / pulp t. If it is less than 0.5 kg / pulp t, the wet paper strength may not be sufficiently increased, and if it is more than 20.0 kg / pulp t, the hydrolyzability may be too slow.

On the other hand, the tissue paper according to the present embodiment is a 3-ply or 4-ply tissue paper, but may be embossed. More preferably, it is a double embossing in which the convex portion formed by embossing faces the inside of the ply stack. In the case of double embossing, it is desirable that 1 to 2 plies are embossed in the case of 3 plies, and 1 to 3 plies are embossed in the case of 4 plies. That is, some plies may not be embossed. Further, it is desirable that the top of the convex portion is laminated with a known laminating glue such as starch, carboxymethyl cellulose, water-based ink, etc., and the plies are bonded to each other via the top of the convex portion by laminating embossing. The area, depth, and range of individual embossing in embossing are not necessarily limited, but have a substantially flat top surface on one side, the top surface area is 0.50 to 2.50 mm ² , and the embossing recess depth. It is desirable that 5 to 30 embosses having an embossing value of 0.05 to 0.50 mm are formed per 10 mm square so that the embossing pressure applied area is 5 to 20% of the whole. The embossed recess depth is a value measured by a one-shot 3D measurement macroscope VR-3200 manufactured by Keyence Co., Ltd. or its equivalent, and image analysis software "VR-H1A" or its equivalent software. The measurement is performed under the conditions of a magnification of 12 times and a visual field area of 24 mm × 18 mm. However, the magnification and the viewing area can be appropriately changed depending on the size of the embossing. As a specific measurement procedure, the above software is used to obtain an embossed recess depth (measurement cross-sectional curve) profile in a line segment that crosses the longest part of the peripheral edge of one emboss in an image. From the cross-sectional curve of this embossed recess depth profile, λc: 800 μm (where λc is the “filter that defines the boundary between the roughness component and the waviness component” described in JIS-B0601 “3.1.1.2”). Of the "contour curves" obtained by removing the short-wavelength surface roughness component with a low-frequency filter, the minimum between the two upwardly convex inflection points P1 and P2 and the inflection points P1 and P2. Find the value and set it as the minimum depth Min. Further, the average value of the depth values of the inflection points P1 and P2 is defined as the maximum depth value Max. In this way, the embossed recess depth = maximum value Max-minimum value Min. Further, the distance (length) of the inflection points P1 and P2 on the XY plane is defined as the length of the longest portion. Similarly, the embossed recess depth is measured for the shortest portion in the direction perpendicular to the longest portion, and the larger value is adopted as the embossed recess depth. The above measurement is performed for any 10 embosses on the surface of the toilet paper, and the average value thereof is taken as the final embossing recess depth.

On the other hand, the toilet paper of the present embodiment is particularly suitable for the form of a toilet roll. A preferable form of the toilet roll made of the toilet paper of the present embodiment is preferably a winding hardness of 0.55 to 1.17 kgf , a winding length of 20 to 30 m, and a winding diameter of 100 to 117 mm. The winding hardness is measured by a π gauge manufactured by Muratec KDS Co., Ltd. or an equivalent machine thereof. Specifically, the π gauge is wound around the circumference of the roll and pulled to the left and right in the tangential direction of the roll to narrow the center of the roll, and the tension when the diameter of the center of the roll shrinks by 3 mm from the original state is applied with the push-pull gauge. It was measured. It was measured with a π gauge in the same way as the winding diameter. The π gauge referred to here is a measure made of stainless steel that is wound around the circumference of the roll and the diameter is read from the length.

Hereinafter, the effect of the toilet paper according to the present invention will be further described with reference to Examples.

Examples of the present invention (Examples 1 to 9), Comparative Examples 1 to 4, and Toilet paper according to Conventional Examples 1 to 6 are manufactured, and the physical property values and composition of the toilet paper wrapped around the toilet paper are produced. In addition to measuring the values, sensory tests were conducted on "durability when wet / resistance to tearing (objective)", "softness to the touch", "softness", and "smoothness". The methods for measuring basis weight, paper thickness, dry and wet tensile strength, MMD, softness, winding hardness, water absorption rate and water solubility are as described above.

The test method for sensory evaluation is as follows. The test is conducted by 15 evaluators, and each sample is evaluated 5 times per evaluator, and the average obtained by excluding the abnormal value score is used as the evaluator's score in a certain sample. Further, the score of the conventional example 1 is set to 4 points, and each sample is scored from 1 to 7 points, and the average value of each evaluator is calculated and scored. In this evaluation, 9 evaluators can evaluate each sample 5 times per evaluator, so that the evaluation can be sufficiently unbiased.

The sample toilet paper was a total of 19 types, including 4 types of comparative examples, 9 types of examples, and 6 types of conventional examples, which are commercially available products. Conventional example 1 of a commercially available product serving as a reference sample is toilet paper having the highest market share and is the sample touched by the largest number of consumers.

The four items of sensory evaluation are "durability when wet / resistance to tearing (objective)", "softness to the touch", "fluffy feeling", and "smoothness".

"Durability when wet / Difficult to tear (objective)" wipes off the moisture on the inner part of the pottery surface of the washbasin (TOTO compact hand wash basin (handle type faucet) LSL870AP), and at that time it is firm without tearing. The score of the reference sample was set to 4 and the score was given in 7 steps to determine whether or not it was wiped off.

For "softness to the touch", the evaluator pulled out the toilet paper and traced it with his hand to touch the softness of the skin, which was scored on a 7-point scale with a reference sample score of 4.

For the "fluffy feeling", the evaluator pulled out the toilet paper, rolled it, and scored the soft feeling when touched on a scale of 7 with a reference sample score of 4.

For "smoothness", the smoothness when the evaluator pulled out the toilet paper and traced it with his / her hand was scored in 7 steps with the score of the reference sample being 4.

When the results of the sensory evaluation in Table 1 are confirmed, the examples according to the present invention are "durability when wet / resistance to tearing (objective)", "softness to the touch", "soft feeling", and "smoothness". In each sensory evaluation of "Sa", the value is significantly superior to that of each conventional example. On the other hand, even when compared with the comparative example, the results were much better in terms of "durability when wet / resistance to tearing (objective)", "fluffy feeling", and "smoothness". Comparative Example 3 is highly evaluated for "softness to the touch", but considering that the example has 3 plies or 4 plies and the comparative example 3 has 2 plies, the examples have multiple plies. It can be evaluated that the "softness to the touch" is equal to or higher than that of Comparative Example 3 of 2 plies. Further, the examples according to the present invention are excellent in sensory evaluation, have a water absorption rate higher than those of the conventional example and the comparative example, and are durable. That is, the toilet paper according to the present invention is a toilet paper that is not easily torn in a wiping application other than the human body and has an excellent texture when wiping a person.

1 ... Toilet roll, 10 ... Toilet paper, 20 ... Paper tube, L1 ... Toilet roll width, L2 ... Toilet roll diameter, L3 ... Paper tube diameter, 100 ... MMD measuring device.

Claims (3)

3 or 4 ply toilet paper
Toilet paper with a winding hardness of 0.55 to 1.17 kgf.
The basis weight per ply of toilet paper is 14.9 g / m ² or more and 16.2 g / m ² or less, and the overall paper thickness is 297 μm or more and 435 μm or less.
The fiber material is composed of NBKP and LBKP, and the ratio (NBKP / LBKP) is 50/50 to 30/70, and no moisturizer is applied.
Embossing with a flat top surface on one side, an area of the top surface of 0.50 to 2.50 mm ² , and an embossing recess depth of 0.05 to 0.50 mm, and an embossing area of 5 to 20 in total 5 to 30 pieces were formed per 10 mm square so as to be%.
Dry tensile strength length is 451 cN / 25 mm or more and 1001 cN / 25 mm or less, and
Toilet paper characterized in that the ratio of the lateral wet tensile strength to the lateral dry tensile strength is 0.09 or more. The toilet paper according to claim 1, wherein the water absorption rate is 2.4 seconds or less . The toilet paper according to claim 1, which is hydrolyzable within 36 seconds.

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