Wet tissue and manufacturing method of base fabric for wet tissue

Abstract

To suppress dropout of fibers of a wet tissue in wiping and improve dirt wiping property.SOLUTION: A wet tissue is a nonwoven fabric impregnated with chemical liquid and impregnation rate of the chemical liquid to the nonwoven fabric is 200 wt.% or more and less than 300 wt.%. The nonwoven fabric includes at least cellulose-derived fibers. Basis weight of the nonwoven fabric in a dry state is greater than 35.8 g / m2 and less than 124.2 g / m2. Slip angle of the nonwoven fabric in a wet state is 35° or more and 40° or less both in MD direction and CD direction.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a wet tissue using a nonwoven fabric sheet as a base fabric and a method for producing a base fabric for wet tissues. [Background technology]

[0002] As the raw material for wet tissues, a composite nonwoven fabric obtained by hydroentangling pulp and synthetic fibers, which are easy to ensure strength, is sometimes used (see Patent Document 1). In addition, raw material that has been embossed to improve the dirt scraping ability and thickness of the wet tissue, or raw material that has been given a mesh pattern during hydroentangling, is also used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4648724 Summary of the Invention [Problem to be solved by the invention]

[0004] However, according to the study by the present inventor, it was found that embossed products and mesh types are not preferable depending on the object and conditions of wiping. Specifically, it was confirmed that there are problems such as remaining powder and falling off of fibers when wiping off powder. In particular, when it comes to powder, if the sheet surface is uneven due to embossing, the powder moves to the concave parts and does not adhere sufficiently to the sheet, which is considered to result in poor wiping properties.

[0005] Therefore, in one aspect, the present invention aims to provide a technique capable of suppressing the falling off of fibers during wiping and improving the wiping ability of dirt. [Means for solving the problem]

[0006] In order to solve the above problems, the inventors conducted research and found that by adjusting the sliding angle of a composite nonwoven fabric made of pulp and synthetic fibers, the wear resistance of the wiper surface can be improved and the powder collection properties can be particularly excellent, even for plain materials (i.e., materials that have not been embossed, creped, etc.).

[0007] The wet tissue according to the present invention is a wet tissue in which a nonwoven fabric is impregnated with a medicinal solution, the impregnation ratio of the nonwoven fabric with the medicinal solution is 200% by weight or more and less than 300% by weight, the nonwoven fabric contains at least cellulose-derived fibers, and the nonwoven fabric has a basis weight of 35.8 g / m in a dry state. 2 Larger than 124.2g / m 2 and the nonwoven fabric may have a sliding angle in a wet state of 35° or more and 40° or less in both the MD and CD directions.

[0008] In the wet tissue of the present invention, the cellulose-derived fibers include at least pulp fibers, and the nonwoven fabric is a pulp-containing composite nonwoven fabric in which the content of the pulp fibers in the nonwoven fabric is 65% by weight or more and less than 90% by weight, and the pulp-containing composite nonwoven fabric may be made from a composite nonwoven fabric obtained by hydroentangling a spunbond nonwoven fabric and a pulp fiber web.

[0009] The wet tissue of the present invention has a TS7 value, which is expressed as the intensity of the maximum peak in the spectrum including a frequency of 6500 Hz and is obtained when the bladed rotor is pressed from above onto the nonwoven fabric in a dry state with a pressing pressure of 100 mN and then rotated at a rotation speed of 2.0 per second and the vibration of the sample stage is measured with a vibration sensor, and the TS7 value is 9.5 dBV. 2 rms greater than 20.9 dBV 2 It may be less than rms.

[0010] The wet tissue of the present invention has a TS750 value of 29.8 dBV, which is expressed as the intensity of the maximum peak of the first spectrum from the low frequency side, obtained by pressing the nonwoven fabric in a dry state from above with a bladed rotor at a pressing pressure of 100 mN and then rotating it at a rotation speed of 2.0 per second and measuring the vibration of the sample stage with a vibration sensor. 2 RMS over 151.5dBV 2 It may be less than rms.

[0011] In the wet tissue according to the present invention, the nonwoven fabric may be such that, when subjected to a friction operation in a wet state using a Taber abrasion tester specified in JIS L 1096, the number of rotations of the disk of the Taber abrasion tester until holes due to abrasion are observed is 60 or less.

[0012] The manufacturing method of the wet tissue base fabric according to the present invention is a manufacturing method of the wet tissue base fabric used as the raw material for the wet tissue described in claim 2, in which the method for forming the pulp fiber web is an airlaid method, and the method for integrating the spunbond nonwoven fabric and the pulp fiber web is a hydroentanglement method.

[0013] In the manufacturing method for a wet tissue base fabric according to the present invention, in the hydroentanglement method, the hole diameter φ of the water jet nozzle for spraying the water jet may be 0.06 to 0.15 mm, the water jet nozzles may be arranged in 5 or more stages along the transport direction of the nonwoven fabric, and the injection pressure of the water jet may be 10 MPa or more. Effect of the Invention

[0014] According to one aspect of the present invention, it is possible to suppress the falling off of fibers during wiping and improve the wiping ability of dirt. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, embodiments of the present invention will be described. Note that the following embodiments are merely examples for explaining the present invention, and are not intended to limit the configuration of the present invention to the contents of the following embodiments.

[0016] In the description of the present invention, the MD direction means the direction of the production line during the production of wet tissues (in other words, the conveying direction; machine direction), and the CD direction means the direction perpendicular to the production line direction (i.e., the MD direction) during the production of wet tissues (cross direction).

[0017] (Overall composition) The wet tissue according to the embodiment is configured such that a medicinal solution is impregnated into a sheet-shaped nonwoven fabric containing at least cellulose-derived fibers.

[0018] The chemical solution to be impregnated into the nonwoven fabric is not limited to a specific type, but may be, for example, an aqueous alcohol solution such as ethanol, which is typically used to impregnate general-purpose wet tissues, and may contain polyhydric alcohols in combination with the alcohol component to prevent the nonwoven fabric from drying out. In addition, emulsifiers, thickeners, pH adjusters, surfactants, stabilizers, discoloration inhibitors, fragrances, colorants, and the like may be appropriately added.

[0019] The impregnation ratio of the drug solution to the nonwoven fabric is not limited to a specific value, but the lower limit is preferably 200% by weight or more, more preferably greater than 200% by weight, and even more preferably 210% by weight or more, and the upper limit is preferably less than 300% by weight, more preferably 250% by weight or less, and even more preferably 240% by weight or less.

[0020] The impregnation ratio (wt %) of the chemical solution to the nonwoven fabric is calculated according to the following formula 1. (Equation 1) Amount of water (chemical solution) contained in the nonwoven fabric (g) ÷ Weight of the nonwoven fabric when air-dried (g) × 100

[0021] If the impregnation ratio of the nonwoven fabric with the chemical solution is less than 200% by weight or more than 300% by weight, the wet tissue will be inferior in terms of powder collection properties (in other words, wiping properties).

[0022] Specific examples of the powder in the description of the present invention include silica sand, talc, and fly ash as specified in JIS Z 8901 (test powders and test particles).

[0023] Regarding the softness derived from the fibers of the wet tissue, a bladed rotor is pressed from above onto a dry nonwoven fabric as a wet tissue base fabric with a pressing pressure of 100 mN, and then rotated at a rotation speed of 2.0 revolutions per second. The vibration of the sample stage is measured with a vibration sensor. The TS7 (Total Softness Index 7) value is expressed as the intensity of the maximum peak of the spectrum including a frequency of 6500 Hz. The lower limit of the TS7 (Total Softness Index 7) value is preferably 9.5 dBV. 2 Greater than rms, preferably 9.8 dBV 2 rms or more, and more preferably 10.0 dBV 2 rms or higher, and the upper limit is preferably 20.9 dBV 2 rms, preferably less than 20.0 dBV 2 rms or less, and more preferably 14.0 dBV 2 The smaller the TS7 value, the softer the sample (specifically, the nonwoven fabric) is.

[0024] TS7 value is 9.5dBV 2 Less than rms or 20.9 dBV 2 If it is more than rms, the powder collecting property (in other words, wiping property) of the wet tissue is particularly poor.

[0025] Regarding the smoothness of the surface of the wet tissue, a bladed rotor is pressed from above onto a dry nonwoven fabric as a wet tissue base fabric with a pressing pressure of 100 mN, and then rotated at a rotation speed of 2.0 per second. The vibration of the sample stage is measured with a vibration sensor. The TS750 (Total Softness Index 750) value is expressed as the intensity of the maximum peak of the first spectrum from the low frequency side. The lower limit is preferably 29.8 dBV. 2 rms or higher, preferably 31.6 dBV 2 Greater than rms, preferably 35 dBV 2 rms or higher, and the upper limit is preferably 151.5 dBV 2 rms, preferably less than 60 dBV 2 rms or less, and more preferably 47.9 dBV 2 The smaller the TS750 value, the smoother the sample (specifically, the nonwoven fabric) is.

[0026] The TS750 value is 29.8dBV 2 Less than rms or 151.5 dBV 2 If it is more than rms, the powder collecting property (in other words, wiping property) of the wet tissue is particularly poor.

[0027] (Nonwoven fabric) The nonwoven fabric used as the base fabric for wet tissues contains at least cellulose-derived fibers (in other words, cellulose material), and the cellulose-derived fibers contained in the nonwoven fabric preferably contain at least pulp fibers. Specifically, the nonwoven fabric used as the base fabric for wet tissues is preferably a pulp-containing composite nonwoven fabric.

[0028] The content of pulp fibers in a nonwoven fabric (specifically, for example, a pulp-containing composite nonwoven fabric) as a base fabric for wet tissues is not limited to a specific value, but the lower limit is preferably 65% ​​by weight or more, more preferably 70% by weight or more, and even more preferably 75% by weight or more, and the upper limit is preferably less than 90% by weight, more preferably 85% by weight or less, and even more preferably less than 80% by weight. If the proportion of pulp fibers in the nonwoven fabric is less than 65%, the liquid retention properties as a wet tissue will be poor, and if it is 90% by weight or more, the strength as a wet tissue will be somewhat poor.

[0029] If the pulp fiber content in a nonwoven fabric (specifically, for example, a pulp-containing composite nonwoven fabric) is 0% by weight or 90% by weight or more, the wet tissue will be poor in terms of powder collection properties (in other words, wiping properties).

[0030] The pulp-containing composite nonwoven fabric used as the wet tissue base fabric may be prepared by hydroentangling a spunbonded nonwoven fabric and a pulp fiber web.

[0031] Spunbond nonwoven fabrics are made of polypropylene and contain primarily polypropylene fibers, and may further contain one or more synthetic fibers selected from the group consisting of nylon, vinylon, polyester, acrylic, polyethylene, and polystyrene.

[0032] The pulp fiber web preferably comprises one or more bleached softwood kraft pulp (NBKP) fibers selected from the group consisting of radiata pine, slash pine, southern pine, lodgepole pine, spruce, and Douglas fir.

[0033] The pulp fiber web may contain common pulp fibers such as bleached hardwood kraft pulp (LBKP) in addition to bleached softwood kraft pulp (NBKP), but preferably contains bleached softwood kraft pulp (NBKP) and bleached hardwood kraft pulp (LBKP).

[0034] The content ratio of softwood bleached kraft pulp (NBKP) to hardwood bleached kraft pulp (LBKP) in the pulp fibers contained in the pulp fiber web is preferably in the range of 50:50 to 100:0, more preferably in the range of 70:30 to 100:0, even more preferably in the range of 90:10 to 100:0, and most preferably 100:0.

[0035] The basis weight of the nonwoven fabric (specifically, for example, a pulp-containing composite nonwoven fabric) used as the base fabric for wet tissues in a dry state without being impregnated with a chemical solution is not limited to a specific value, but the lower limit is preferably 35.8 g / m 2 Larger, preferably 40 g / m 2 More preferably, it is 63.6 g / m or more. 2 and the upper limit is preferably 124.2 g / m 2 More preferably, it is less than 110 g / m 2 or less, and more preferably 104.2 g / m 2 The following is the result.

[0036] The nonwoven fabric has a basis weight of 35.8 g / m in a dry state. 2 or less than 124.2 g / m 2 If the content is more than this, the wet tissue will be inferior in terms of powder collection properties (in other words, wiping properties).

[0037] The magnitude of the sliding angle of a nonwoven fabric (specifically, for example, a pulp-containing composite nonwoven fabric) used as a base fabric for wet tissues in a wet state is preferably 35° or more in both the MD and CD directions at the lower limit and 40° or less in the upper limit, more preferably less than 40°.

[0038] The sliding angle is the inclination angle of the inclined plate when a sample (specifically, a sheet-like nonwoven fabric) moistened with water is placed on the inclined plate and the inclination angle of the inclined plate is gradually increased and the sliding distance reaches a predetermined distance. The sliding angle can be measured according to JIS P 8147.

[0039] If the sliding angle of the nonwoven fabric in a wet state in at least one of the MD and CD directions is less than 35° or exceeds 40°, the wet tissue will be poor in terms of powder collection (in other words, wiping ability).

[0040] The magnitude of the sliding angle of the nonwoven fabric in a wet state can be adjusted to be within a predetermined range by the pulp content (content ratio) of the nonwoven fabric serving as the base material, the tension during operation (during production), the speed, the thermal calendar, the impregnation ratio of the chemical solution, and the composition of the chemical solution, etc.

[0041] By adjusting the sliding angle of the nonwoven fabric in a wet state to fall within a specified range, the flat surface condition of the original fabric, the amount of chemical solution between the object to be wiped, the state of retention of the chemical solution, and the composition of the chemical solution can be controlled, which is thought to contribute to improving the powder collection properties (in other words, the wiping properties) in particular.

[0042] Regarding the abrasion strength in a wet state of a nonwoven fabric (specifically, for example, a pulp-containing composite nonwoven fabric) as a base fabric for wet tissues, in a friction operation performed using a Taber abrasion tester specified in JIS L 1096, the number of rotations of the disk of the Taber abrasion tester until holes due to abrasion are observed is preferably 60 or less, more preferably 50 or less, and even more preferably 41 or less.

[0043] The abrasion resistance of a nonwoven fabric in a wet state can be measured using a Taber abrasion tester specified in JIS L 1096. Specifically, a sample (specifically, a sheet-like nonwoven fabric) moistened with water is attached to the rotating horizontal disk of the Taber abrasion tester, and a pair of friction wheels (H-18) formed with an abrasive grain combination is applied under a specified load (4.9 N) (in other words, friction is applied by a rubbing operation), and the abrasion resistance is examined. The number of rotations of the disk of the Taber abrasion tester until holes due to abrasion are observed in the sample (specifically, the sheet-like nonwoven fabric) can be used as an index for judgment.

[0044] Regarding the abrasion resistance of a nonwoven fabric in a wet state, if the number of rotations of the disk of a Taber abrasion tester exceeds 60 revolutions, the wet tissue becomes poor in terms of powder collection (in other words, wiping ability).

[0045] (Manufacturing method) The manufacturing process of the wet tissue according to the embodiment may be the same as the manufacturing process of a normal wet tissue product.

[0046] The wet tissue according to the embodiment can be manufactured by a manufacturing process including, for example, (1) manufacturing a wet tissue base fabric, (2) cutting, and (3) folding, lamination, and impregnation with a chemical solution. The timing of impregnation with the chemical solution may be before or after lamination, or lamination and impregnation with the chemical solution may be performed simultaneously.

[0047] In the present invention, it is preferable that no embossing is performed.

[0048] In the manufacture of the wet tissue base fabric (1) above, when a composite nonwoven fabric obtained by hydroentangling a spunbonded nonwoven fabric and a pulp fiber web is used as the raw roll of the pulp-containing composite nonwoven fabric, the method of laminating and integrating the pulp fiber web on the spunbonded nonwoven fabric may be a general method such as a spunlace method, but from the viewpoint of liquid retention and wiping off dirt, the hydroentangling method is preferable. The process of integration by hydroentangling is described in detail, for example, in Japanese Patent No. 6758116. And, as a part of the explanation of the present invention, the contents and explanations regarding hydroentangling described in Japanese Patent No. 6758116 (including the configuration of the manufacturing device for the composite nonwoven fabric) are considered to be applicable.

[0049] In the water jet entanglement method, the water jet nozzle of the composite nonwoven fabric manufacturing apparatus described in Japanese Patent No. 6758116 may have a hole diameter φ of 0.06 to 0.15 mm, the water jet nozzles may be arranged in 5 or more rows (up to 10 rows) along the transport direction of the nonwoven fabric (i.e., MD direction), and the water jet injection pressure may be 10 MPa or more.

[0050] From the viewpoint of water absorption speed, the method for forming a fiber web of cellulose-derived fibers (specifically, for example, pulp fibers) is preferably the air-laid method. Wet tissues produced by using a wet method for forming a fiber web (specifically, for example, a pulp fiber web) tend to have a poor water absorption speed.

[0051] The wet tissue produced by the above manufacturing process is packaged in a package and then shipped as a product. The package is not limited to a specific type, specification, or shape, as long as it is a water-impermeable and flexible plastic film package or a sealable plastic container that is used for ordinary wet tissue products. EXAMPLES

[0052] Hereinafter, examples of the present invention will be described. Note that the following examples are merely illustrative for explaining specific examples of the present invention, and are not intended to limit the configuration of the present invention to the contents of the following examples.

[0053] Samples having the physical properties, dimensions, and specifications shown in Tables 1 and 2 below were used, and evaluations were performed on each of Examples 1 to 7 and Comparative Examples 1 to 7, with the powder soil collection ability being the evaluation point of view.

[0054] Regarding the pattern of the base fabric (specifically, a sheet-like nonwoven fabric), "plain" refers to a sheet that has not been embossed or creped (wrinkled), "mesh" refers to a sheet with regularly-arranged holes, and "thermally embossed" refers to a sheet that has been heat-embossed.

[0055] The proportion of the cellulose material is the content (wt %) of fibers derived from cellulose in the base fabric (specifically, the sheet-like nonwoven fabric).

[0056] The pulp percentage is the content (wt %) of pulp fibers in the base fabric (specifically, the sheet-like nonwoven fabric).

[0057] The sliding angle in a wet state was measured using a friction coefficient measuring instrument (friction measuring instrument AN manufactured by Toyo Seiki Seisakusho) that determines the static friction coefficient by the inclination method, and a sample (specifically, a sheet-like nonwoven fabric) moistened with water was used to measure the sliding angle in the longitudinal direction (i.e., MD) and the sliding angle in the cross direction (i.e., CD) of the sample according to JIS P 8147. The sliding distance was 100 mm.

[0058] The Taber surface property test in a wet state is a measurement of the maintenance of surface integrity of a nonwoven fabric in a wet state, and was performed using a Taber abrasion tester specified in JIS L 1096. Specifically, a sample (specifically, a sheet-like nonwoven fabric) moistened with water was attached to the rotating horizontal disk of the Taber abrasion tester, and a pair of rubber friction wheels (S-32) was applied under a specified load (4.9 N) (in other words, friction was applied by a friction operation), and the condition of the sample surface after five rotations was visually judged. The result of the visual judgment was marked as "○" when no or almost no fibers were removed from the sample, and marked as "×" when fibers were removed from the sample.

[0059] The Taber abrasion resistance test in a wet state is a measurement of the abrasion strength of a nonwoven fabric in a wet state, and was performed using a Taber abrasion tester specified in JIS L 1096. Specifically, a sample (specifically, a sheet-like nonwoven fabric) moistened with water was attached to the rotating horizontal disk of the Taber abrasion tester, and a pair of friction wheels (H-18) formed from an abrasive grain combination was applied under a specified load (4.9N) (in other words, friction was applied by a rubbing operation) to examine the abrasion resistance. The number of rotations of the disk of the Taber abrasion tester until holes due to wear were observed in the sample was used as an index for judgment.

[0060] The TS7 value and the TS750 value were measured using a softness measuring device TSA5 (Tissue Softness Analyzer; manufactured by Emtec Electronic GmbH). Specifically, the softness measuring device TSA5 pressed a rotating bladed rotor against a dry sample (specifically, a sheet-like nonwoven fabric) and detected vibration data by various sensors, which were then parameterized through vibration analysis (i.e., the TS7 value and the TS750 value were obtained). The pressing pressure of the bladed rotor was set to 100 mN, and the rotation speed of the bladed rotor was set to 2.0 revolutions per second.

[0061] The collection of powdery dirt was evaluated by visually evaluating the degree of powder remaining when a 100mm x 100mm sheet of nonwoven fabric was wiped off with a nonwoven fabric moistened with a 65% ethanol solution at a specified impregnation ratio. Ash from incinerated paper, which is insoluble, was used as the powder.

[0062] Specifically, 0.05 g of powder was placed on a smooth table, a nonwoven fabric moistened with a chemical solution was placed on top of the powder, and a 59 g weight was placed on the nonwoven fabric, which was then dragged 30 cm for 5 seconds. The degree of remaining dirt was then visually evaluated.

[0063] The results of the visual evaluation were classified into one of the following four levels (categories) regarding the degree of powder residue. <Classification of evaluation results> The powder was neatly collected: Most of the powder was collected: ○ A little powder remains: × There was a lot of powder remaining: ××

[0064] Table 1 shows the physical properties, specifications, and evaluation results of the samples for each of Examples 1 to 7, and Table 2 shows the physical properties, specifications, and evaluation results of the samples for each of Comparative Examples 1 to 7.

[0065] [Table 1]

[0066] [Table 2]

[0067] From the results shown in Table 1, the wet tissues of Examples 1 to 7 were all evaluated as having good powder stain collection, with either "powder was collected neatly (◎)" or "powder was mostly collected (○)." This confirmed that the collection of powder and other stains (in other words, wiping ability) was particularly good and excellent.

[0068] In contrast, the results shown in Table 2 show that the wet tissues of Comparative Examples 1 to 7 were all rated as having poor powder stain collection properties, with either "a small amount of powder remaining (X)" or "a large amount of powder remaining (XX)," confirming that they had poor collection properties for powder and other stains (in other words, wiping ability).

[0069] From the results shown in Tables 1 and 2, it was confirmed that by producing wet tissues using nonwoven fabrics such as those of Examples 1 to 7 (specifically, pulp-containing composite nonwoven fabrics) as a wet tissue base fabric, particularly good wet tissues can be obtained as the wet tissues of the present invention.

[0070] (Action and effect) The wet tissue according to the embodiment has a flat surface (in other words, plain), and when used in a wet state impregnated with a chemical solution, it is possible to suppress the falling off of fibers during wiping, and it is possible to improve the wiping performance, particularly for powder and other stains. The wet tissue according to the embodiment can particularly improve the wiping performance for powder having a median diameter (by mass) of 10 μm or less.

[0071] The above describes an embodiment of the present invention, but the specific configuration of the present invention is not limited to the above embodiment, and the present invention also includes embodiments in which modifications and changes are made to the above embodiment without departing from the gist of the present invention.

Claims

1. The wet tissue is made of nonwoven fabric impregnated with a medicinal solution. The impregnation ratio of the chemical solution to the nonwoven fabric is 200% by weight or more and less than 300% by weight, The nonwoven fabric contains at least cellulose-derived fibers, The nonwoven fabric has a basis weight of 35.8 g / m in a dry state. ２ Larger than 124.2 g / m ２ is less than The nonwoven fabric has a sliding angle in a wet state of 35° or more and 40° or less in both the MD and CD directions. A wet tissue characterized by the above-mentioned.

2. The cellulose-derived fibers include at least pulp fibers, The nonwoven fabric is a pulp-containing composite nonwoven fabric in which the content of the pulp fibers in the nonwoven fabric is 65% by weight or more and less than 90% by weight, The pulp-containing composite nonwoven fabric is prepared by hydroentangling a spunbond nonwoven fabric and a pulp fiber web, 2. The wet tissue according to claim 1.

3. The bladed rotor is pressed from above onto the dry nonwoven fabric with a pressing pressure of 100 mN, and then rotated at a rotation speed of 2.0 per second. The vibration of the sample stage is measured with a vibration sensor, and the TS7 value, which is expressed as the intensity of the maximum peak of the spectrum including a frequency of 6500 Hz, is 9.5 dBV. ２ rms greater than 20.9 dBV ２ is less than rms, 2. The wet tissue according to claim 1.

4. The bladed rotor was pressed from above onto the dry nonwoven fabric with a pressing pressure of 100 mN, and then rotated at a rotation speed of 2.0 per second. The vibration of the sample stage was measured with a vibration sensor, and the TS750 value, which is expressed as the intensity of the maximum peak of the first spectrum from the low frequency side, was 29.8 dBV. ２ rms or more 151.5dBV ２ is less than rms, 2. The wet tissue according to claim 1.

5. The nonwoven fabric has a disc rotation number of 60 or less revolutions until a hole due to abrasion is observed in a Taber abrasion tester specified in JIS L 1096 under a friction operation in a wet state.

2. The wet tissue according to claim 1.

6. A method for producing a wet tissue base fabric used as a raw material for the wet tissue according to claim 2, The method for forming the pulp fiber web is an airlaid method, The method for integrating the spunbond nonwoven fabric and the pulp fiber web is a hydroentanglement method. A method for producing a wet tissue base fabric comprising the steps of:

7. In the hydroentanglement method, The water jet nozzle has a hole diameter φ of 0.06 to 0.15 mm. The water jet nozzles are arranged in five or more stages along the conveying direction of the nonwoven fabric, The water jet injection pressure is 10 MPa or more. The method for producing the wet tissue base fabric according to claim 6 .

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