WO2007034855A1 - Sanitary tissue paper - Google Patents

Abstract

[PROBLEMS] To overcome the unsanitary problem accompanying oozing of snivel toward the back face of tissue paper. [MEANS FOR SOLVING PROBLEMS] A sanitary tissue paper having a two- or three-layered structure wherein each of layers (11), (12) and (30) is a paper layer made from pulp and suffers from oozing of not more than 10 mg of an artificial snivel toward the back face in an oozing test of the artificial snivel (no loading).

Description

 Specification

 Sanitary tissue paper

 Technical field

 [0001] The present invention relates to sanitary thin paper such as tissue paper and toilet paper. More specifically, the present invention relates to tissue paper that captures bodily fluids containing viruses such as runny nose.

 Background art

 [0002] Conventionally, this type of sanitary thin paper has a problem that it is unsanitary because the nasal fluid may fall through and stick to the hands. Of course, multiple layers of sanitary thin paper can be avoided. However, it is uneconomical to stack multiple layers of sanitary thin paper. In addition, when multiple layers of sanitary thin paper are layered, the thinness and softness are impaired, so the merit of recent sanitary thin paper, which has become rich in tenderness and softness, is diminished. If you have a cold, a runaway runny nose that contains the virus may touch your hands and cause body infections through food.

 Therefore, sanitary thin paper containing an antiviral agent has been proposed as a sanitary thin paper that has solved the problem of being unsanitary (see, for example, Patent Document 1).

 However, if fluid containing viruses such as runny nose breaks through before the antibacterial action of the antiviral agent is manifested, this is a fundamental solution to prevent the spread of infection. It cannot be done.

 Patent Document 1: Special Table 2003-512542

 Disclosure of the invention

 Problems to be solved by the invention

[0003] A main object of the present invention is to provide a sanitary thin paper that is hygienic and has characteristics required for sanitary thin paper such as softness. Yet another issue will become clear from the following explanation.

 Means for solving the problem

[0004] The present invention that has solved this problem is as follows. [Invention of Claim 1]

 Two or more layers of hygienic tissue paper,

 At least one outer layer of the outermost layer of the sanitary thin paper is a paper layer made from pulp,

 Hygienic thin paper characterized in that the amount of artificial runny nose penetration in an artificial runny nose test (when no load is applied) is 10 mg or less.

[0005] (Function and effect)

 Since the amount of artificial nasal runthrough is less than 10 mg, it becomes hygienic when a runny nose is bitten or when the contaminated liquid is wiped off. When you catch a cold, you can prevent the virus from coming into contact with the human body and prevent its transmission. In addition, even if the trash can is discarded after being rolled up into a trash can, contact with the body can be prevented. The power of public health is excellent.

 In addition, since it is at least one of the outermost layers, it feels the same as general tissue paper and does not feel uncomfortable.

[0006] [Invention of claim 2]

 3 layers of laminated sanitary thin paper,

 A sanitary thin paper characterized in that each layer is a paper layer made from pulp, and the amount of human runny nose through in an artificial runny nose through test (when no load is applied) is 10 mg or less.

[0007] (Function and effect)

 If three layers of laminated sanitary thin paper are used, and both outermost layers are paper layers made from pulp, the front and back can be used without distinction, and the touch is excellent, and the intermediate layer is made from pulp. Therefore, the product as a whole is highly flexible.

[Invention of claim 3]

 3. The sanitary thin paper according to claim 1 or 2, wherein the amount of reverse of the artificial runny nose in the test for passing through the artificial runny nose under load conditions (3 seconds at 250 g load) is 150 mg or less.

[0009] (Function and effect)

Artificial runny nose penetration test under load conditions (3 seconds at 250 g load) is almost the same as when actually blowing the nose. As far as the inventor investigated, the lowest value of the commercial product is 1 It was 53 mg. This commercial product has been found to have a small amount of actual runny nose breakthrough, and from the point of view, the amount of artificial runny nose breakthrough specified in claim 3 can sufficiently prevent the runthrough. I understand. The amount of artificial runny nose penetration is more desirably 90 mg or less.

 [Invention of claim 4]

 The sanitary thin paper according to claim 2, wherein the basis weight of the intermediate layer is larger than both outer layers! /.

[0011] (Function and effect)

 When the basis weight of the intermediate layer is larger than both outer layers, the liquid absorbency (liquid absorption amount) in the intermediate layer is increased, and as a result, the effect of reducing the breakthrough is enhanced.

[Invention of Claim 5]

 Anti-viral agent is included in the middle layer! The sanitary thin paper according to claim 2.

[0013] (Function and effect)

 It is desirable to add antiviral agents to sterilize or suppress their activity. In this case, when an antiviral agent is contained in the intermediate layer through which the runny nose component can penetrate, the liquid system containing the virus comes into contact with the antiviral agent, so that sterilization or suppression of the activity can be achieved. In the present invention, as will be described later, the term “include” in the present specification means that the surface portion is dispersed by coating or the like when dispersed in the entire layer or when dispersed in the upper side or the lower side. It is meant to include all forms, such as when present.

 [Invention of Claim 6]

 3. The sanitary thin paper according to claim 2, wherein the outer layers contain a chemical solution that increases liquid impermeability.

 [0015] (Function and effect)

 When the outer layer contains a chemical solution that increases liquid impermeability, the liquid that has once penetrated into the intermediate layer can be confined, and as a result, the effect of reducing the see-through of a runny nose and the like is enhanced.

 [Invention of Claim 7]

 7. The layers according to any one of claims 1 to 6, wherein each of the layers overlapping each other is superposed by any one of the bonding forces selected from the group strength of thermal fusion, ultrasonic fusion, adhesive and ply bonding. Sanitary tissue paper as described in 1.

[0017] (Function and effect) Examples of means for superposing the layers include thermal fusion, ultrasonic fusion, pressure-sensitive adhesive, and ply bonding.

 [0018] [Invention of claim 8]

 3. The sanitary thin paper according to claim 2, wherein any one of the intermediate layers is colored and the coloration is visible from at least one outermost layer side.

[0019] (Function and effect)

 If any one of the intermediate layers is colored and the coloration is visible from at least one of the outermost layers, it can be easily distinguished from ordinary sanitary thin paper, Since the ingredients are not in contact with the skin, rough skin can be prevented.

 [Invention of claim 9]

The sanitary thin paper according to any one of claims 1 to 8, wherein the product has a basis weight of ¹⁰ to 55 gZm2.

 [0021] (Function and effect)

In the case of 2 layers or more, especially 3 layers of laminated sanitary thin paper, it is desirable to use an excess of rice paper weight of 55 gZm ² or less in order to impair softness. If the tsubo is less than lOgZm ² , the liquid absorbency will be sufficient and it will be difficult!

 The invention's effect

 [0022] It is possible to provide a sanitary thin paper that is hygienic and has the characteristics required for a sanitary thin paper such as softness.

 BEST MODE FOR CARRYING OUT THE INVENTION

 Next, an embodiment of the present invention will be described.

As shown in the drawings, the sanitary thin paper 10 of the present embodiment has a two or more layered layer structure. Here, the “layer” means a configuration having a predetermined thickness in which the material continuously develops in the planar direction. Therefore, in addition to a layer made of a plurality of materials laminated and integrated (“laminate”), one layer or laminate is regarded as one “ply” and partially joined to the other ply. Including food. Therefore, the present invention includes a “ply assembly” having two or more plies. [Structural example]

 The structure of the sanitary thin paper of the present invention will be described with reference to various embodiments. In FIG. 1, the outer layer 11 on the use surface side is a liquid absorbent layer made of pulp, and the other outer layer 12 on the other non-use surface side is a liquid-impermeable layer (indicated by hatching). is there. Here, “liquid impermeable layer” means a layer having low liquid permeability, as opposed to “liquid absorbing layer”, which does not mean a layer that does not allow liquid to completely permeate.

 Fig. 3 shows a liquid-impermeable intermediate layer 30 interposed between the outer layer 11 and the outer layer 12.Fig. 4 shows the first intermediate layer 31 and the second intermediate layer between the outer layer 11 and the outer layer 12. The intermediate layer 30 of the layer 32 is interposed. In this case, both or one of the first intermediate layer 31 and the second intermediate layer 32 can be a liquid-impermeable layer.

 FIG. 5 shows an intermediate layer 30 of a first intermediate layer 31, a second intermediate layer 32, and a third intermediate layer 33 interposed between the outer layer 11 and the outer layer 12. In this case, any one of the first intermediate layer 31, the second intermediate layer 32, and the third intermediate layer 33 can be a liquid impermeable layer.

 FIG. 6 shows a partially joined portion obtained by joining the laminated body of the outer layer 11 and the intermediate layer 31 and the laminated body of the outer layer 12 and the intermediate layer 32 by heat bonding, ultrasonic bonding, adhesive, ply bonding, or the like. 40 ply bonded.

 FIG. 7 shows a laminate of the outer layer 11 and the intermediate layer 31 and a single outer layer 12 which are ply bonded by the partial bonding portion 40.

[0025] Although these forms are only exemplary, in the present invention, in the present invention, at least one outer layer of the outermost layer is a paper layer using pulp as a raw material. It is sufficient if any of the layers is a liquid-impermeable layer. However, as shown in FIG. 3 and FIG. 4, it is desirable in terms of absorbability of fluid such as runny nose that both the outer layer 11 and the outer layer 12 are paper layers. In particular, a three-layer product is optimal because it does not give excessive rigidity.

[0026] The intermediate layer 30 can be colored. In addition to using materials that are already colored, the colorant is colored by adding dyes or pigments, whether natural or synthetic, to the target layer or the surface of the layer in the manufacturing process of sanitary thin paper. be able to. In addition, geometric shapes such as circles, triangles, and rectangles that can be colored just by coloring the whole, flowers, trees, grass, etc. Any design, such as any plant, person, animal, or fish, may be partially designed with a colorant. Coloring can be visually differentiated by the user from general-purpose tissue paper. An example of the colored layer is shown by hatching with a broken line. If necessary, the outer layer can be colored.

 [0027] The above example is an example of a laminate. As the laminating means, heat fusion bonding, ultrasonic fusion bonding, or a means for interposing an adhesive can be employed. In addition to the entire surface, these bonding sites may be partial, such as stripes, dots, lattices, and spirals in plan view. In the case where the bonding part is the entire surface, it cannot be said that it is a layer because it does not become a different material if the definition of the above-mentioned “layer” is provided. On the other hand, in the case of full-surface bonding with an adhesive, an adhesive, which is another material, is interposed, so it is defined as an “adhesive layer”.

 In the present invention, an antiviral agent can be contained on the surface or inside of any layer. Further, an antiviral agent can be contained on the surface or inside of any of the plurality of layers. A preferred example is a form in which both outermost layers are paper layers and an antiviral agent is contained on the surface or inside of the intermediate layer.

 [Liquid impermeability and liquid impervious layer]

 In the present invention, the sanitary thin paper 10 has a liquid-impermeable layer. As a result, for example, when the nose is bitten with the outer layer 11 of the sanitary thin paper 10 of FIG. 1 used as a working surface, the runny nose W does not pass through (Fig. 3 conceptually shows the form of preventing the falling-through). If it is disposed inside and rounded or folded as shown in Fig. 2, the runny nose is retained inside, so it is possible to prevent other people from transmitting the virus in the runny nose and it is clean for public health. It will be a thing.

 [0030] The liquid impermeability of the liquid impervious layer of the present invention is determined from the characteristics of the sanitary thin paper 10 as a whole. That is, the liquid impermeability of the liquid impermeable layer is determined by the thickness of the layers other than the liquid impermeable layer, the type of material, the number of laminated layers, and the like.

[0031] In the present invention, it is sufficient that the sanitary thin paper 10 itself has a liquid impermeability so that the runny nose is not substantially penetrated. Specifically, the liquid impermeability based on the 10-point method is preferably 0 to 9 points, more preferably 0 to 5 points, and more preferably 0 to 2 points. It is particularly preferred. Also, liquid impermeability based on the 10-point method When the degree is 0 to 2, as shown in the liquid-impermeable layer, when the sanitary thin paper 10 is rolled up after use, the liquid W containing the virus such as runny nose is kept in the wrapped state. Therefore, it is particularly preferable.

[0032] Here, the 10-point method is an evaluation method for indicating the degree of liquid impermeability. According to this evaluation method, first, three filter papers ("ADVANTEC 1 (150mm)" manufactured by Toyo Filter Paper Co., Ltd.) are stacked, a test piece is placed thereon, and a measurement plate 40 shown in Fig. 8 is placed thereon. Then, each hole 41, 41... Of the measurement plate 40 is filled with distilled water droplets, and the number absorbed by the filter paper within 2 seconds is counted, and this number is indicated as a score. The thickness is 8mm and the diameter force of each hole 41, 41 ... is 10mm.

 [0033] The above ten-point method is not necessarily a high accuracy as a method for evaluating liquid impermeability! In contrast, the present inventor is not limited to preventing complete run-through of the runny nose, and the amount of artificial runny nose that passes through is 10 mg or less in the run-through test of the sanitary thin paper to be measured. As long as it is known, it is known to be hygienic in actual use.

 [0034] Here, the amount (mg) of the artificial runny nose that passes through by the run through test of the artificial runny nose is a value obtained through the test process of the following (1) to (5).

 (1) Artificial runny nose (saline (urea 2%, salt sodium 0.8%, salt calcium 0.3%, magnesium sulfate 0.8%, ion-exchanged water 96. 1%): CMC ( (Carboxymethylcellulose) 4% aqueous solution = 1: 2, food red (trace)

 (2) Two sheets of filter paper (“ADVANTEC 1 (150mm)” manufactured by Toyo Roshi Kaisha, Ltd.) are stacked and the mass is measured.

 (3) Lay the test sample folded in half on the laminated filter paper.

 (4) Drip the artificial nasal lml on the filter paper with a micropipette of 10 mm height force.

 (5) After 10 seconds, remove the test paper, measure the mass of the filter paper, and use the mass difference from before the dripping as the amount of nasal drainage (mg).

 In the sanitary thin paper 10, it is desirable that the water absorption of the paper layer constituting the outer layer is 5 seconds or more, particularly 5 to 10 seconds. Here, the water absorption (seconds) of the outer paper layer is a value obtained through the following test processes (6) to (10).

(6) Prepare distilled water, digital micropipette, stopwatch and tripod stand. (7) Lay two sheets of test paper and place them on a support with a hole with a diameter of 40 mm or more.

 (8) 10mm height force on test paper Drop 1 drop (0.1 ml) of distilled water with a digital micropipette.

 (9) Use a stopwatch to measure the time from when the distilled water contacts the test paper until the water is completely absorbed and the reflection on the test paper disappears (in units of 0.01 seconds).

 (10) Repeat this test 5 times, and the first degree after the decimal point of the average value is the water absorption (seconds).

[0036] On the other hand, in the case of three or more layers including both outermost layers, the intermediate layer can increase the effect of preventing back-through by making the liquid holding capacity larger than both outermost layers. One means of making the liquid holding capacity of the intermediate layer larger than the liquid holding capacity of both outermost layers is to increase the rice tsubo.

[0037] By the way, in the case of a two-layer structure, the weight of one of the outer layers of the liquid absorbent layer made from pulp is 10 to ²⁰ gZm ² and the weight of the other outer layer constituting the liquid-impermeable layer is smaller. It is preferably a 15~35gZ m ^2. Also, in the case of a three-layer configuration, the rice basis weight of both outer layers of the liquid absorbent layer made from pulp is 10 to 20 gZm ² , and the weight of the intermediate layer constituting the liquid impervious layer is 15 to 35 gZm ^2. In particular, 15 to 25 gZm ² is desirable.

 [0038] In this case, as the liquid holding capacity of the intermediate layer, it is desirable to use the Krem water absorption (JIS P 8141) as an index, and the Krem water absorption is 30 mm or more, particularly 30 to 50 mm. desirable. In addition, the amount of water absorption calculated for the weight difference between before and after the measurement of the Clem water absorption is preferably 3 Omg or more, particularly 30 to 50 mg.

 [0039] The "paper layer" in the present invention may contain other types of cellulose, hemicellulose, hydrophilic acetate cellulose, hydrophilic non-woven fiber and the like as long as the pulp material is the main component. On the other hand, a liquid-impermeable layer is provided, and the hygiene thin paper as a whole can prevent the runny nose from passing through.

 The first means for forming the liquid-impermeable layer is to use a material such as a plastic film or a water-repellent nonwoven that contributes to liquid-imperviousness.

The second means for forming the liquid-impermeable layer is to use hydrophilic fibers such as pulp fibers and acetate cellulose, and add a liquid-impermeable agent to add liquid-impermeable properties. It is a method of imparting a transient. In the present invention, it is desirable to adopt this second means.

[0040] When the liquid-impermeable layer is formed using, for example, a film or the like as a raw material, the film to be covered may not be formed with micropores, but the viewpoint of pursuing the softness of sanitary thin paper. Is preferably formed with a plurality of micropores. The opening diameter of the plurality of micropores is preferably 0.1 to 40 nm, more preferably 0.5 to 30 nm, and particularly 10 to 20 nm. preferable. If the opening is too small, the sanitary thin paper will not have a sufficient softening effect. On the other hand, if the opening is too large, the virus may escape the impermeable layer. The size of the virus is about 20 to 250 nm.

 [0041] The micropores are formed! The film can be formed from, for example, a hydrophobic thermoplastic resin. On the other hand, a film (porous film) in which micropores are formed melt-kneads a hydrophobic thermoplastic resin and a fine inorganic filler that is equivalent to calcium carbonate or an incompatible organic polymer. Thus, a film can be formed, and this film can be formed by uniaxial or biaxial stretching. Polyolefins and the like can be used as the above thermoplastic resin. Further, as this polyolefin, for example, one kind or several kinds such as high to low density polyethylene, linear low density polyethylene, polypropylene and polybutene can be appropriately selected and used.

 [0042] Hydrophobic non-woven fabrics can also be used. Examples of the non-woven fabric include fibers made of a thermoplastic resin alone such as polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, and polyamides, and these resins. A non-woven fabric formed of a composite fiber having a core-sheath type structure or a side bisite type structure using two or more of these can be used. Such non-woven fabrics are preferably manufactured by a general production method such as an air-through method, a melt blown method, a heat seal method, a span bond method, a succin heat bond method or the like! At least one of them is considered to be a raw material! /

[0043] When a norp fiber is used as a raw material, liquid impermeability can be imparted by adding a sizing agent. In this case, the sizing agent is preferably included in a mass ratio of 0.02 to 0.06% by solid content to the absolute dry weight of the pulp, more preferably 0.03 to 0.05%. . S When the blending amount of the sizing agent is less than 0.02% by mass, it is impossible to sufficiently reduce the back-through of the liquid. On the other hand, if the amount of the sizing agent exceeds 0.06% by mass, there arises a problem that the water repellency becomes too strong.

 [0044] As the sizing agent, for example, a neutral sizing agent such as alkyl ketene dimer, alkaryl succinic anhydride, and water-free stearic acid, and an acidic sizing agent such as saponified natural rosin and reinforced rosin may be used. it can.

 On the other hand, in the above structural example, an example in which the intermediate layer is mainly a “liquid impermeable layer” has been described. In contrast, the outer layer can be a “liquid impermeable layer” and the intermediate layer 30 can be a “liquid absorbing layer”. Specifically, as shown in FIG. 9, a three-layer structure can be formed, the outer layers 11 and 12 can be “liquid-impermeable layers”, and the intermediate layer can be “liquid-absorbing layers”.

 In this example, a liquid such as a runny nose from one of the outer layers 11 and 12 permeates through the liquid-impermeable layer with the help of its discharge pressure, and is in the “liquid-absorbing layer” as the intermediate layer 30. If you move to, the runny nose will be absorbed and will stay there. That is, since the other outer layer is a “liquid impermeable layer”, the runny nose absorbed in the intermediate layer 30, which is a “liquid absorbing layer”, is less likely to be exposed.

 [0047] More preferably, the outer layers 11 and 12 are paper layers made of norp as a raw material, ensuring flexibility and good touch, and the strength of the outer layers 11 and 12 is glycerin and polyhydric alcohol. Moisturizing chemicals such as sugars can be added as a drug that imparts impermeability, resulting in a hygienic thin paper product with a surface with excellent moisturizing properties, and a product that does not easily penetrate the runny nose. Become.

 [0048] [Production method]

 Next, the manufacturing method of the sanitary thin paper 10 will be described by taking the case of three layers as an example.

In this manufacturing method, as shown in FIG. 13, first, the intermediate layer 30 is unwound from the reel 50. Next, an antiviral agent is externally applied to one or both surfaces of the intermediate layer 30 thus fed out by antiviral agent application means 35 and 36 on both surfaces in the illustrated example. Then, one outer layer 11 or the other outer layer 12 is overlaid on both sides of the intermediate layer 30 coated with the antiviral agent. In this manufacturing example, one outer layer 11 is a reel 51 Thus, the other outer layer 12 is fed out from the reel 52 and overlapped with the intermediate layer 30. The sanitary thin paper 10 having three layers in this way can be wound up on a reel 53 and stored as appropriate.

 [0049] [Material used: drugs, etc.]

As the basis weight of the layer of the present invention, the basis weight (JIS P 8124) of the intermediate layer with the basis weight of the outer layers 11 and 12 (JIS P 8124) of 10 to ²⁰ gZm ² and a larger liquid holding capacity is 15 When it is set to ˜35 gZ m ² , it is particularly preferable in that the thinness and softness are not impaired.

 [0050] The moisture content of the outer layers 11 and 12 is preferably 8 to 15% by mass of pulp fibers constituting the outer layers 11 and 12, and is preferably 10 to 13% by mass. preferable. If the moisture content is less than ¾% by mass, the moist feeling is lost and the moisture in the stratum corneum may be taken away. On the other hand, if the moisture content exceeds 15% by mass, it may lead to stickiness.

 [0051] A preferred example of the sanitary thin paper 10 is a form having outer layers 11 and 12 and an intermediate layer 30. The ability to contain antiviral agents on the surface of the outer layers 11 and 12 Antiviral agents rarely cause rough skin for users with sensitive skin, so the surface 30a of the intermediate layer 30 It is desirable to externally add an antiviral agent by coating or the like. According to this form, the liquid containing the virus that has permeated the outer layer 11 or 12 penetrates through the outer layer 11 or 12, and comes into contact with the antiviral agent on the surface 30a, so that the killing action of the antiviral agent is effectively expressed. The

 The antiviral agent can also be internally added to the intermediate layer 30.

[0052] The method of externally adding the antiviral agent is not particularly limited. For example, spray coating, gravure coating, slot coating and the like can be exemplified. Further, the method for internally adding the antiviral agent is not particularly limited. For example, a method of filling in a microcapsule can be exemplified. Furthermore, the applied amount including the external and internal additions of the antiviral agent can be 0.1 to 30 gZm ^{2 on the} basis of the absolute dry matter amount.

One of the ply bonding means according to the present invention is ply bonding. That is, it is possible to apply a line-like ply bonding force due to an embossing cage that prevents delamination along both end edges in at least one of the longitudinal and lateral directions of the sheet. The ply bonding cover is also applied to the edge force of the sheet at a position 5 to 40 mm apart. It is more preferable to apply it at a position 10 to 20 mm apart. If it is less than 5 mm, the middle layer may come into contact with the skin after the ply peels off. On the other hand, if it exceeds 40 mm, the middle part may turn over and the skin may touch the skin.

 Examples of ply bonding include a process of joining by embossing (giving), a process by slit formation, and a process by an adhesive.

The sanitary thin paper 10 preferably has a softness of 0.5 to 3. Og and a KES touch index of 8 to 15. If this value is satisfied, the sanitary thin paper 10 is sufficiently soft.

 [0055] Here, softness is a resistance value (average value in length and width) when a sanitary thin paper having a width of 10 cm is pushed into a gap of width 5. Omm by a terminal. The smaller the value, the softer the softness. Means. In this specification, softness refers to a value measured by the handleometer method (JIS L-1096 E method). The softness can be adjusted, for example, by changing the basis weight, the number of layers, the type of fibers forming the layers, the contact processing conditions, and the like.

 [0056] On the other hand, the KES touch index is a value measured by the following method.

That is, in this measurement, as shown in FIGS. 10 to 12, for example, an artificial leather (Sablare: Idemitsu) on the base of a friction tester “KES SEJ made by Kato Tech Co., Ltd.” (Techno Fine Co., Ltd.) is spread and fixed, and the measurement terminal is covered with artificial leather (Sablare: Idemitsu Techno Fine Co., Ltd.) and the measurement surface of the measurement terminal is covered with human leather (contact plane) Apply 4 mg of olive oil (BOSCO etastra virgin oil: NISSIN SEIMITSU OIL) uniformly in the same manner as the MMD measurement procedure.In detail, the contact plane made of artificial leather has a cross-sectional diameter of 0. It consists of a 5 mm piano wire, has a unit bulging part with a radius of curvature of 0.25 mm at the end adjacent to it, has a continuous measurement surface with a total width of 10 mm, and the length of the measurement surface is 10 mm. MMD measurement with a measuring surface of approximately 10 mm square The terminal can be formed by covering with the artificial leather The covering of the terminal with the artificial leather is in close contact with the measurement surface of the terminal so that a contact plane of 10 mm square is formed. In order to fix the artificial leather to the terminals, the artificial leather and the inner part of the paper are moved during measurement, that is, when the paper sample is moved. And the terminal It is important to fix it securely so that it does not slip and cause distortion or the like on the artificial leather or contact plane. For example, after the terminal is covered so that the contact plane is formed, the portion that does not form the contact plane is securely attached to a portion that does not affect the measurement of the device with a rubber band or the like, for example, a support material for the terminal. Fix it. In addition, place artificial leather on the base of the MMD testing machine and fix it with adhesive tape. At this time, it is important to firmly fix the artificial leather on the base so that it will not be distorted during measurement. The artificial leather laid on the base is the same as the artificial leather constituting the contact plane. Paper samples should be cut into a 10cm square and fixed on a base with artificial leather. When measuring, press the sample holding weight (about lOOg) on the paper sample. Also, the load on the measuring terminal of the testing machine is 50 g, and the entire contact plane made of human leather is brought into contact with the paper sample with a contact pressure of 50 gfZcm ² , which is similar to the MMD measurement. This can be achieved by attaching a weight to the top of the terminal. Of course, the method of fixing one end of the support material (the end opposite to the direction of movement of the paper sample) conforms to the MMD measurement. The measurement is performed 6 times, 3 times in the vertical direction and 3 times in the horizontal direction, and the measured value (KES feel index) is the average of the 6 times.

 The KES feel index can be adjusted by, for example, the type of fiber forming the outer layer, the fiber length, the fineness, the type of liquid-impermeable chemical applied to the outer layer, the amount applied, and the like.

As a means for imparting or enhancing liquid impermeability to the layer in the present invention, there is a means for using a liquid impervious chemical solution as described above. Examples of powerful liquid impervious chemicals include polysiloxanes such as silicone oil and silicone powder known as moisturizing chemicals, glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol and the like. Examples include polyhydric alcohols, sorbitol, glucose, xylitol, maltose, maltitol, mannitol, saccharides such as trehalose, glycol solvents, and derivatives containing at least one humectant. be able to. Further, higher alcohols such as cetanol, stearyl alcohol and oleyl alcohol, liquid paraffin and the like can also be used. However, the liquid-impermeable chemical solution preferably contains at least a polyhydric alcohol. Moisturizing and in use This is to reduce the damage to the skin.

 [0058] These liquid-impermeable chemicals are preferably applied in an amount of 15 to 30%, preferably 20 to 25%, based on the mass of the target layer on an absolute dry mass basis. preferable. If it is less than 15%, the effect of applying a chemical solution cannot be sufficiently obtained. On the other hand, if it exceeds 30%, the effect of chemical solution application is not improved and it is uneconomical.

 [0059] In addition, liquid-impermeable chemicals include amino acids such as glycine, aspartic acid, arginine, alanine, cystine and cystine; Extracts from plants such as chima extract, lily extract, and lotus root extract; vegetable oils such as olive oil, jojoba oil, rosehip oil, almond oil, eucalyptus oil, apogad oil, camellia oil, soybean oil, safflower oil, sesame oil, evening primrose oil Vitamins, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, chitosan, urea, honey, royal jelly, sodium hyaluronate, ceramide, squalane, petrolatum and the like can be blended.

 [0060] Furthermore, vitamin C, vitamin E, collagen, and the like can be added to the liquid-impermeable chemical solution. This kind of chemicals has a function of enhancing moisture. Vitamin C and vitamin E also function as antioxidants. Vitamin E is a highly reducing component and has an antioxidant effect that eliminates active oxygen 'free radicals and prevents the formation of lipid peroxides. Therefore, vitamin E functions as a stabilizer for chemicals, and when applied to the skin of a person using thin paper, it exhibits an antioxidant effect and blood circulation promoting effect on the sebum of the skin. It also has a moisturizing function. Vitamin C, like Vitamin E, has the anti-oxidative action of sebum. Furthermore, since vitamin C has an action of reducing vitamin E, when both vitamin C and vitamin E are used, vitamin C acts as an auxiliary agent for vitamin E and is oxidized by active oxygen. It reduces the amount of vitamin E and maintains the antioxidant effect of vitamin E's powerful sebum. Collagen forms 90% of the dermis of the skin, and when this decreases, the skin loses moisture and tension. Therefore, when it is contained in the thin paper, it exhibits a moisturizing effect that moisturizes the skin when it comes into contact with the skin, and also exhibits a moisturizing effect on the thin paper.

[0061] Further, if the liquid-impermeable chemical solution is weakly acidic with a pH of 5.0 to 6.0, the chemical solution that does not cause the skin to become alkaline even when brought into contact with the skin. Rough skin caused by pH Can be effectively prevented. A particularly preferred pH range is 5.3 to 5.7. The pH can be adjusted by adding an acidic or basic pH adjuster to the chemical solution. If the chemical solution is strongly acidic, use a sodium hydroxide aqueous solution or a potassium hydroxide aqueous solution. When neutral and alkaline, citrate, malic acid and lactic acid can be used.

 [0062] As the liquid-impermeable chemical solution, a chemical solution for obtaining a refreshing feeling, for example, sorbitol, alkitol, xylitol, erythritol, latathitol, palatinit and the like can be blended. Preferred are erythritol, xylitol and sorbitol, and more preferred are erythritol and xylitol. Further, these chemical solutions may contain one or two or more kinds of cooling sensates selected from the group strength of menthol, salicylic acid, α-cinerol and derivatives thereof. In this case, it is desirable to include a drug for obtaining a refreshing feeling in the outer layer in a state of being dispersed in the binder component.

 [0063] On the other hand, examples of chemicals that are desirably added (internally added) in the papermaking stage for forming a layer include wet paper strength agents, softeners, and carboxymethylcellulose. A representative example of the softener is a surfactant-based softener. The surfactant-based softener can be appropriately selected from the strengths of anionic surfactants, nonionic surfactants, cationic surfactants and zwitterionic surfactants. When an anionic surfactant is used, the stiffness (bending rigidity) can be reduced, so that the moisturizing agent can enhance the softness of the softening agent.

 [0064] As the ionic surfactant, carboxylate-based, sulfonate-based, sulfate ester-based, phosphate ester-based surfactants and the like can be used. However, alkyl phosphate ester salts are preferred.

[0065] Examples of nonionic surfactants include polyhydric alcohol monofatty acids such as sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monostearate, and propylene glycol monostearate. Esters, Ν- (3-Oleirosyl 2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbite dense wax, polyoxyethylene sonolebitane sesquistearate, polyoxyethylene monooleate, polyoxyethylene Monolaurate, polyoxyethylene cetyl ether, polyoxyethylene lauric Luether or the like can be used.

 [0066] As the softening agent, it is desirable to use a cationic surfactant. This is because the cell membrane (fat) of viruses, especially influenza viruses, is ionic, and is suitable for decomposing fat and killing (inactivating) the virus after the cationic surfactant is adsorbed to the cell membrane (fat). This is because of this. As cationic surfactants, quaternary ammonium salts, amine salts, amines, and the like can be used.

[0067] Also, as the zwitterionic surfactant, aliphatic derivatives of secondary or tertiary amines containing carboxy, sulfonate, sulfate, or heterocyclic secondary or secondary

An aliphatic derivative of tertiary amine can be used.

[0068] As the wet paper strength (enhancement) agent, in addition to the melamine formaldehyde addition condensate and the urea formaldehyde addition condensate, the following can be preferably used in consideration of the environment. In other words, polyacrylamide, polybulal alcohol, Darioxar 'polyacrylamide copolymer, polyamide epoxy hydrin resin with reduced functional groups to the usual lZio, dialdehyde starch or cationic modified starch, oxidized starch, etc. In particular, a thermosetting resin comprising a polyburamide copolymer having a cationic property and a divalent aldehyde (for example, JP-B 44-26670, JP-B 54-44762, JP-B 57-149595). ), Cationic aldehyde-modified polyacrylamide copolymer (see, for example, JP-A-6-184985 and JP-A-8-56868), a cationic polymer and a key polymer In addition, at least one polymer of a cationic polymer and a ionic polymer is hydrophobic (for example, see JP-A-2002-275787). .) And the like, can be used known ones.

[0069] When this sanitary thin paper is used as tissue paper, it is preferable that the paper thickness is 1S 200-350 111 in a set of 3 sheets (3 plies), preferably 240-320 111 Preferable 1 ヽ₀ paper If the thickness is too thin, the feeling of paper thinness felt by the user will become remarkable, and the function as a tissue paper will deteriorate due to poor water absorption. On the other hand, if the paper thickness is too thick, the drawer performance will be inferior when a predetermined number of sheets are stored in the storage box.

Here, the paper thickness is measured under the conditions of JIS P 8111 using an Ozaki Manufacturing Dial Thickness gauge “1¾ occupying 00: G type”. Specifically, the plunger and measuring table Check that there is no dust, dust, etc. in between, lower the plunger on the measuring table, move the memory of the dial thickness gauge to set the zero point, then raise the plunger to raise the sample (hygiene Place a thin paper) on the test table, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed. The paper thickness is the average value obtained after 10 measurements.

[0071] In the sanitary thin paper 10, the raw material of each layer is not particularly limited, and an appropriate raw material can be used according to the use such as tissue paper and tile paper. As raw material

In the case of using a norp fiber, the norp fiber (raw pulp) is, for example, wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, etc., more specifically, groundwood pulp (GP), stone ground Pulp (SGP), Refiner Grand Pulp (RGP), Pressurized Ground Pulp (PGW), Thermomechanical Pulp (TMP), Chemithermomechanical Pulp (CTMP), Bleach Chemi-Samme Power-Cal Pulp (BCTMP), etc. MP), chemical mechanical pulp (CGP), semi-chemical pulp (SCP), hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), etc. Kraft pulp (KP), soda pulp (AP) Synthetic pulp and deinking pulp made from chemical pulp (CP) such as sulfite pulp (SP) and dissolved pulp (DP), nylon, rayon, polyester, polybulal alcohol (PVA), etc. Waste paper pulp such as DIP and West Pulp (WP), ground pulp (TP), cotton, flax, hemp, jute, manila hemp, ramie, etc. Raw pulp, straw pulp, esbalt pulp, bagasse pulp, bamboo pulp One kind or several kinds can be appropriately selected and used from stalk and pulp such as kenaf pulp and auxiliary pulp such as bast pulp.

 [0072] Raw materials such as pulp fibers are formed into a single layer by, 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. When making this paper, for example, pH adjusters such as dispersants, caustic soda, and aqueous ammonia, antifoaming agents, preservatives, fluorescent dyes, mold release agents, water-resistant agents, flow modifiers, yield improvers, and other appropriate agents Chemicals can be added.

[0073] The type of antiviral agent that can be used in the sanitary thin paper 10 is not particularly limited. For example, monoterpene hydrocarbons contained in plant extract components such as ocimen, camphene, limonene, sabinene, minoresene, tenolepinene, binene, and cymene, Ronole, Gera-Honore, Isopregonore, Linaronore, Monotenolebenalcohols such as Tenole Pinerole Nore, Fanetol, Forced Lubachlor, Eugenol, Timonole, Paracresol, Cabicol, Rose Butts Extract, Green Tea Polyphenol, etc., t -Phenolic ethers such as cannetole, chapicol methyl ether, safrole, aldehydes such as acetoaldehyde, citral, citronellal, gera-ear, perylaldehyde, parellar, acetophenone, camphor, jasmon, notecaton, menthone, Ketones such as phencon, carvone and pulegone, oxides such as cariolephine oxide, cineol and bisabolol oxide, catechin, proanthocyanin, flavone, Bannon, Antoshianin, phenols, flavonoids flavonols such, among the medicinal ingredients, such as, can be appropriately selected and used one or several. In addition, for example, organic acid such as ascorbic acid, carboxylic acid, and citrate, alkyl benzene sulfonic acid such as sodium dodecyl benzene sulfonate, sodium dodecyl benzene sulfonate, calcium dodecyl benzene sulfonate and salts thereof, ionic surfactant, Cationic surfactants, amphoteric surfactants, nonionic surfactants and the like can also be used. However, it is preferable to use at least one of a surfactant and a polyhydric alcohol as the antiviral agent. This is to inactivate the virus by adsorbing to the viral cell membrane.

[0074] that these antiviral agents that respect is increased liquid holding capacity absolute dry mass intermediate layer 0. l~30gZm ² is assigned is preferred instrument L～10gZm ² grant Is particularly preferred. If it is less than 0.lgZm ² , the effect of applying an antiviral agent cannot be sufficiently obtained. On the other hand, even if it exceeds 30 g / m ² , the effect of applying an antiviral agent is not sufficiently improved and it is uneconomic

[0075] Further, when an antiviral agent is used as described above, it is preferable that the inactivation rate against a virus having a cell membrane is 99% or more. Moreover, the reason why the target virus is limited to those having a cell membrane is that the surfactant is adsorbed on the cell membrane and decomposes to suppress the growth of the virus.

 [0076] Influenza virus (AZPanamaZ2007Z99) is used as a method for measuring the inactivation rate.

(H3N2)) is adjusted to about 10 ⁵ FFUZml with the minimum essential medium to obtain a virus solution. Anti A thin paper impregnated with a virus agent is used as the middle layer, and a three-layer structure is used as one set of test paper. This test paper is cut into 1.5cm x l.5cm, making 3 sets of 1 sample (9 sheets in total, including 3 middle layers impregnated with antiviral agent), and soaked in 0.5ml of virus solution. Leave at room temperature (25 ° C) for 1, 5, 15 and 60 minutes. The reaction solution after standing was diluted 1: 1 to 4 times, and the virus infectivity (quantitative value indicating the infectivity of the virus) in the solution was measured by the microinfectivity method. The ratio (%) of inactivation is taken as the measured value.

 Example

 [0077] Regarding the example product according to the present invention, the commercially available general-purpose tissue paper, and the commercially available tissue paper that is moisturizing, various characteristics such as the penetration of artificial runny nose were investigated. The results shown in Table 1 and Table 2 were obtained. Here, the “absorbing layer” in each table means “intermediate layer” in the case of a three-layer structure, and “one layer” in the case of a two-layer structure. The measured values of water absorption are shown in the corresponding columns.

 It was found that the example products according to the present invention have a very high effect of reducing the run-through of the runny nose. Although not shown in the table, all of the examples have softness values of 0.5 to 3.0 g, and KES feel index values of 8 to 15, indicating almost the same flexibility and Shows touch.

[0078] [Table 1]

[¾ [007

Is as follows.

 (11) Artificial runny nose (saline (urea 2%, salted sodium 0.8%, salted calcium 0.3%, magnesium sulfate 0.8%, ion-exchanged water 96. 1%): CMC ( (Carboxymethylcellulose) 4% aqueous solution = 1: 2, food red (trace amount)).

 (12) Two sheets of filter paper (“ADVANTEC 1 (150mm)” manufactured by Toyo Roshi Kaisha, Ltd.) are stacked and measured for mass. Make a valley crease in the center of this filter paper.

 (13) A test sample is laminated on the laminated filter paper ((a) figure).

 (14) Add 1 ml of artificial nasal drop to the filter paper using a micropipette with a height of 10 mm (Fig. (B)).

(15) Fold the test sample in half along the crease with the filter paper (Fig. (C)).

 (16) On top of that, put water into a 500 ml SUS beaker (manufactured by Tokyo Glass Equipment Co., Ltd.) with a total weight of 250 g. At this time, place the bottom of the beaker (diameter: 82 mm, bottom area: 52.8 cm2) so that it is directly above the center of the artificial nasal drip. After 3 seconds, remove the beaker, remove the test sample, measure the mass of the filter paper alone, and calculate the mass difference from the pre-drip weight as the amount of artificial nasal see-through (mg) under load conditions (3 seconds at 250 g load). To do.

Brief Description of Drawings

FIG. 1 is a schematic sectional view of a sanitary thin paper.

 [Fig. 2] An explanatory diagram of the outline of sanitary thin paper at the time of disposal.

 FIG. 3 is a schematic sectional view of a sanitary thin paper.

圆 4] A schematic cross-sectional view of a sanitary thin paper.

 FIG. 5 is a schematic sectional view of a sanitary thin paper.

 FIG. 6 is a schematic sectional view of a sanitary thin paper.

 FIG. 7 is a schematic sectional view of a sanitary thin paper.

 FIG. 8 is a perspective view of a measurement plate.

 FIG. 9 is a schematic sectional view of another sanitary thin paper.

 FIG. 10 is a diagram for explaining a method for measuring a KES touch index.

 FIG. 11 is a diagram for explaining a method of measuring a KES touch index.

 FIG. 12 is a diagram for explaining a method for measuring a KES feel index.

FIG. 13 is a diagram showing a manufacturing flow of sanitary thin paper. FIG. 14 is an explanatory diagram of conditions for an artificial runny nose penetration test under load conditions (3 seconds at 250 g load).

Explanation of symbols

 10 ··· Hygienic thin paper, 11, 12 ··· Outer layer, 30… middle layer, W… nasal mucus.

Claims

The scope of the claims  [1] Two or more layers of sanitary thin paper,  At least one outer layer of the outermost layer of the sanitary thin paper is a paper layer made from pulp,  Hygienic thin paper characterized in that the amount of artificial runny nose penetration in an artificial runny nose test (when no load is applied) is 10 mg or less. [2] Three layers of laminated sanitary tissue paper,  A sanitary thin paper characterized in that each layer is a paper layer made from pulp, and the amount of human runny nose through in an artificial runny nose through test (when no load is applied) is 10 mg or less. [3] The sanitary thin paper according to claim 1 or 2, wherein the reverse amount of the artificial runny nose in the reverse run test of the artificial runny nose under load conditions (3 seconds at 250 g load) is 150 mg or less. [4] The sanitary thin paper according to claim 2, wherein the basis weight of the intermediate layer is greater than both outer layers! /. [5] The sanitary thin paper according to claim 2, wherein the intermediate layer contains an antiviral agent. 6. The sanitary thin paper according to claim 2, wherein the outer layers contain a chemical solution that increases liquid impermeability. [7] The layers according to any one of claims 1 to 6, wherein each of the layers overlapping each other is overlapped by any one of the bonding forces selected from the group strength of thermal fusion, ultrasonic fusion, adhesive, and ply bonding. Or Sanitary tissue paper according to item 1. 8. The sanitary thin paper according to claim 2, wherein any one of the intermediate layers is colored, and the coloration is visible from at least one outermost layer side. [9] sanitary thin leaf paper according to any one of claims 1-8 products rice basis is 10~55gZm ^2.