JP2020048680A - Wet tissue using composite nonwoven fabric and production method of nonwoven fabric - Google Patents

Abstract

To provide a wet tissue which is produced by using a composite nonwoven fabric formed of a spun bond nonwoven fabric and pulp fiber web, for suppressing production cost, and which is improved in not only water holding ability and wet intensity but also an appearance, a feeling and wiping properties.SOLUTION: In a wet tissue which uses a composite nonwoven fabric obtained by hydroentanglement of a spunbond nonwoven fabric and a pulp fiber web as a raw fabric, a basis weight of the pulp fiber web is 15 g/mor greater and a basis weight of the spunbond nonwoven fabric is 8 g/mor greater, and a mass component ratio of the spunbond nonwoven fabric/pulp fiber web is 15/85 to 50/50(wt%). A fiber diameter of a resin fiber constituting the spunbond nonwoven fabric is 0.6-5.6 decitex, and the spunbond nonwoven fabric is formed so that a stretch ratio in a lateral direction is 5% or smaller when a load of 0.5 N acts in the lateral direction perpendicular to a fiber flow direction, and in addition, the spunbond nonwoven fabric has wear resistance of 20 times or more in a wet Taber test regulated by JIS.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wet tissue manufactured using a composite nonwoven fabric composed of a spunbonded nonwoven fabric and a pulp fiber web.

Wet tissues of various specifications are available on the market for people and objects. It is generally required that the raw material for wet tissue has high hydrophilicity and can hold a chemical solution, has sufficient strength even in a wet state, and has a good texture. 2. Description of the Related Art Composite nonwoven fabrics containing blended fibers and synthetic fibers have been widely used.
In recent years, a composite nonwoven fabric composed of a spunbonded nonwoven fabric and a pulp fiber web manufactured by a technique disclosed in Patent Document 1 or the like is used as a raw material since importance is placed on the required strength and cost reduction. Wet tissue is also offered.

Japanese Patent No. 2533260

However, composite nonwoven fabrics containing rayon fibers are hydroentangled with long fibers, and therefore, if not mixed with sufficient heat-fusible fibers, they tend to stretch easily and have low strength. Since a large amount of fused fibers are blended, there is a problem that the cost increases in proportion to the strength and hand.
On the other hand, a composite nonwoven fabric made of a spunbonded nonwoven fabric and a pulp fiber web is preferable because the production cost can be suppressed and the strength of the spunbonded nonwoven fabric can be easily ensured. Sex cannot be expected. When this is used as a raw material of a wet tissue, there is room for improvement in appearance, texture, wiping properties, and the like, as well as water retention and wet strength, which are basically required for a wet tissue. Furthermore, if it can be designed as a wet tissue with less lint (dust generation), it can be provided to the user as a more preferable product.
Accordingly, an object of the present invention is to reduce the production cost by using a composite nonwoven fabric made of a spunbonded nonwoven fabric and a pulp fiber web as a raw material, and to improve water retention and wet strength, as well as appearance, texture, and wiping properties. To provide wet tissue.

The object is to provide a wet tissue in which a composite nonwoven fabric obtained by hydroentanglement of a spunbonded nonwoven fabric and a pulp fiber web is used as a raw material, wherein the pulp fiber web has a basis weight of 15 g / m ² or more, and the spunbonded nonwoven fabric has The basis weight is 8 g / m ² or more, and the mass composition ratio of the spunbonded nonwoven fabric / pulp fiber web is 15/85 to 50/50 (wt%), and the fibers of the resin fibers constituting the spunbonded nonwoven fabric The diameter is from 0.6 to 5.6 decitex, and the spunbond nonwoven fabric has an elongation of 5% or less in the transverse direction when a load of 0.5 N is applied in the transverse direction perpendicular to the fiber flow direction. Attained by a wet tissue characterized by having a wear resistance of at least 20 times in a wet Taber test specified by JIS. Kill.

  And it is more preferable that the pulp fiber web side of the composite nonwoven fabric, in which the pulp fiber web is laminated on the spunbonded nonwoven fabric, be subjected to embossing.

  Further, the above object is a method for producing a composite nonwoven fabric used as a raw material of the wet tissue described above, comprising at least a hydroentanglement step of hydroentanglement processing the spunbond nonwoven fabric and the pulp fiber web, The water jet nozzle for injecting the water jet in the water entanglement process has a hole diameter φ of 0.06 to 0.15 mm, and the water jet nozzle is arranged in three or more steps along the nonwoven fabric transport direction, and the water jet is driven. It is also achieved by a method for producing a composite nonwoven fabric, wherein the pressure is 10 MPa or more.

  According to the present invention, by using a composite nonwoven fabric made of a spunbonded nonwoven fabric and a pulp fiber web manufactured to satisfy predetermined conditions as a raw material, at low cost, together with water retention and wet strength, appearance, texture, and wiping. We can provide excellent wet tissue. When a wet tissue is manufactured using a composite nonwoven fabric obtained by embossing the pulp fiber web side, the generation of lint can be suppressed, and the texture and wiping properties can be further improved.

It is the figure which showed about the apparatus which manufactures the composite nonwoven fabric used as the raw material of the wet tissue of this invention. It is the figure shown about the wet tissue which concerns on this invention.

  The wet tissue according to the present invention suppresses manufacturing costs by using a composite nonwoven fabric formed under predetermined conditions as a raw material, and has the water retention and wet strength, appearance, texture, and wiping properties required for the wet tissue. Etc. have been improved. First, an apparatus suitable for producing a composite nonwoven fabric which is preferably used as a raw material of a wet tissue and its steps will be described with reference to FIG.

In the nonwoven fabric manufacturing apparatus 1 shown in FIG. 1, an airlaid apparatus 2, a spunbonded nonwoven fabric supply apparatus 3 for supplying a spunbonded nonwoven cloth, and a suction apparatus 4 are provided on the upstream side. The suction device 4 is arranged to face the lower side of the air-laid device 2.
Downstream from these devices 2, 3, and 4 in the web transport direction TD, a water entanglement device 5, a suction device 6, and a drying device 7 for jetting a water jet for performing a water entanglement process are sequentially provided from the upstream side. Are located. A winding device 8 for winding the continuously manufactured nonwoven fabric WP is further provided downstream of the drying device 7.

  The air-laid apparatus 2 is configured to open a raw fiber pulp RP in which fibers are densely formed into a sheet form into pulp fibers, or a pulp fiber PF that has been blown with a blower (not shown) to an air-laid hopper 23. And a duct 22 for carrying.

An air-laid hopper 23 is disposed downstream of the duct 22. Inside the air-laid hopper 23, the pulp fibers in the defibrated state are designed to descend while dispersing, and gradually pile up at the lamination position 24 set on the lower surface to form the pulp fiber web PFW.
The suction device 4 is provided facing the lower side of the stacking position 24. More specifically, the suction device 4 has a suction portion 42 on the upper surface of the device main body 41, and the suction portion 42 moves the stacking position 24 so as to apply a suction force (negative pressure) to the pulp fiber web PFW. It has been set.
FIG. 1 illustrates a case where the pulp fiber web PFW is formed by arranging the air-laid hopper 23 and the suction device main body 41 one by one in one stage. However, the arrangement is not limited to this, and the arrangement of the air-laid hopper 23 and the suction device main body 41 may be changed to two or more multi-stages according to the basis weight (basis weight) and the production speed of the pulp fiber web PFW.

A transport wire 43 for transporting the web is provided around the suction device 4. The transport wire 43 can be placed on the pulp fiber web PFW on which the pulp fibers PF are deposited at the stacking position 24, and is arranged to transport the web to the downstream side. However, the pulp fiber web PFW is not directly placed on the transport wire 43. This will become clear in the following description.
The transport wire 43 is formed in an opening form (mesh) such that the suction force of the suction portion 42 extends to the opposite side (upper side).

  A spunbonded nonwoven fabric supply device 3 is arranged below the airlaid device 2 and upstream of the suction device 4. The spunbonded nonwoven fabric SW prepared in advance is set in a roll shape in the spunbonded nonwoven fabric supply device 3. That is, the spunbonded nonwoven fabric SW in which the elongation rate in the lateral direction is suppressed more than that of the conventional spunbonded nonwoven fabric is formed into a roll, pulled out from the spunbonded nonwoven fabric supply device 3, and rides on the transport wire 43 described above to form the laminate. It is conveyed to a position 24. Here, the fiber flow direction (longitudinal direction) MD of the above-described spunbonded nonwoven fabric SW matches the web transport direction TD of the present manufacturing apparatus 1.

  The pulp fiber web PFW described above is placed on the spunbonded nonwoven fabric SW located at the lamination position 24. At that time, at the laminating position 24, the suction force of the suction part 42 of the suction device 4 passes through the transport wire 43 and acts on the spunbonded nonwoven fabric SW and the pulp fiber web PFW thereon. Therefore, the preliminary laminate PWeb (laminated web) in which the spunbonded nonwoven fabric SW and the pulp fiber web PFW are laminated is transported to the downstream side.

The preliminary stacked body PWeb is maintained in a stacked state by being suction-compressed by the suction force of the suction device 4. At this time, the fibers of the upper pulp fiber web PFW are in a dense state. However, when the preliminary laminate PWeb is transported and charged into the downstream hydroentanglement device 5 as it is, a part of the pulp fiber PF may be soared by the water jet (high-pressure water flow).
Therefore, in the present manufacturing apparatus 1, the sandwiching roller 28 for stabilizing the mounting state of the pulp fiber web PFW on the spunbonded nonwoven fabric SW with the preliminary laminate PWeb sandwiched from above and below, and the upstream of the hydroentangler 5 On the side, a pre-wetting device 30 for providing moisture for preventing fiber scattering is provided. Prewetting device 30 preferably applies a suction force from spray nozzle 31 for spraying water mist from above preliminary laminate PWeb and the lower side of preliminary laminate PWeb (that is, the lower surface of pulp fiber web PFW). The suction device 32 is included.

Although FIG. 1 illustrates a case where the pre-wetting device 30 is provided as a new device in front of the hydroentanglement device 5 as described above, the invention is not limited thereto. With respect to a plurality of sets including a water jet head 51 and a suction device 52, which will be described later, included in the hydroentanglement device 5, a design change may be made such that the set located at the head is used as the pre-wet device 30. In this case, adjustment may be made so that low-pressure water mist is sprayed from the head water jet head 51.
In the case of the water entanglement device 5 in which the number of sets of the water jet head 51 and the suction device 52 sufficient for performing the water entanglement process is secured, the leading water jet head 51 and the suction device 52 are pressed as described above. Utilization as a wet device is effective in controlling the cost of the equipment.

Then, in the water entanglement device 5, the entanglement between the pulp fibers is promoted by spraying a high-pressure water jet on the preliminary laminate PWeb that has been processed by the holding roller 28 and the pre-wet device 30, which are the pretreatment unit. This promotes integration of the pulp fiber web PFW layer located on the upper side and the spunbonded nonwoven fabric SW layer located on the lower side (water entanglement treatment).
The water entanglement device 5 exemplarily shown in FIG. 1 has water jet heads 51 arranged in multiple stages (four stages are illustrated in FIG. 1) along the transport direction TD.
FIG. 1 does not show the state of nozzles provided on the water jet head 51 extending in a direction perpendicular to the transport direction TD (web width direction), but a plurality of water jets in the width direction are shown. The jet nozzle is located at an appropriate position. The hole diameter φ of this water jet nozzle is preferably 0.06 to 0.15 mm, more preferably 0.10 to 0.12 mm. The interval between the water jet nozzles is preferably 0.4 to 1.0 mm.

  The water pressure at the time of performing the hydroentanglement treatment is desirably set in consideration of the basis weight of the pulp fiber web PFW and the spunbond nonwoven fabric SW. For example, the pressure is 1 to 30 MPa, and more specifically, it is preferable to set the water jet nozzle to three or more stages along the transport direction TD at 10 MPa or more.

A suction device 52 is provided so as to face the water jet head 51. The suction force of the suction device 52 is applied to the lower side of the spunbonded nonwoven fabric SW located on the lower side while spraying the high-pressure water jet from the water jet head 51 on the pulp fiber web PFW located on the upper side. By the cooperative action of the water jet head 51 and the suction device 52, the pulp fiber on the pulp fiber web PFW side enters the lower spunbonded nonwoven fabric SW or reaches the opposite side through the spunbonded nonwoven fabric SW. It is presumed that a closed state is formed. The action promotes integration of the two layers.

The water entanglement device 5 is also provided with a transport wire 55. The transport wire 55 receives the preliminary laminate PWeb downstream of the pre-processing units 28 and 30 and transports the preliminary laminate PWeb into the hydroentanglement device 5. The transport wire 55 is disposed so as to pass between the water jet head 51 and the suction device 52 of the hydroentanglement device 5 from the upstream side to the downstream side.
Therefore, the preliminary laminate PWeb conveyed on the conveying wire 55 is subjected to more hydroentanglement processing toward the downstream in the conveying direction TD, and the upper pulp fiber when exiting the hydroentanglement device 5 A sufficient entanglement treatment between the web PFW layer and the lower spunbonded nonwoven fabric SW layer is realized.
The nonwoven fabric immediately after leaving the hydroentanglement device 5 is in a wet state, and the connection between the pulp fibers and the like is not sufficiently established.

Therefore, as shown in FIG. 1, on the downstream side of the hydroentanglement device 5, a suction device 6 and a drying device for sucking and removing water remaining on the web and thereafter performing drying to complete the production of the nonwoven fabric WP. 7 are deployed. As described above, when the dehydration and drying are performed by the suction device 6 and the drying device 7 at the later stage of the production of the nonwoven fabric WP, the nonwoven fabric can be efficiently produced, and the produced nonwoven fabric after hydroentanglement can be dried without applying a large external pressure. Since a nonwoven fabric can be manufactured, it can be finished into a bulky product.
The suction device 6 dehydrates the nonwoven fabric after the hydroentanglement by, for example, a vacuum method. The drying device 7 preferably employs a non-compression dryer, preferably an air-through dryer. In FIG. 1, a rotatable dryer main body 71 of an air through dryer is a cylindrical body, and a large number of through holes are provided in a peripheral surface thereof, and hot air heated by a heat source (not shown) flows from the outer periphery of the dryer main body to a central portion thereof. It is preferable to adopt a configuration in which the air is sucked toward the side.
The composite nonwoven fabric WP continuously manufactured as described above is wound around the roll 81 of the winding device 8 to complete a series of steps.

The composite nonwoven fabric WP manufactured as described above is manufactured so as to satisfy the following conditions. Thereby, it can be used as a raw material suitable for wet tissue.
First, the pulp fiber web PFW has a basis weight of 15 g / m ² or more. As a result, a sufficient water retention capacity required for the composite nonwoven fabric used as the raw material of the wet tissue is secured.
The spunbond nonwoven fabric SW has a basis weight of 8 g / m ² or more. Thereby, sufficient wet strength required for the composite nonwoven fabric used as the raw material of the wet tissue can be secured.
The spunbonded nonwoven fabric / the pulp fiber web, which is the mass composition ratio of the spunbonded nonwoven fabric SW and the pulp fiber web PFW, is preferably set in a range of 15/85 to 50/50 (wt%).

  Further, the fibers constituting the spunbonded nonwoven fabric SW preferably have a fiber diameter of 0.6 to 5.6 dtex. As a result, it is possible to expect an improvement in the texture (feeling feel and feel) required for the composite nonwoven fabric used as the raw material of the wet tissue.

Further, it is preferable to adopt a spunbonded nonwoven fabric having an elongation of 5% or less at a low load of 0.5N in the transverse direction CD perpendicular to the fiber flow direction (parallel to the transport direction TD). Thereby, the shape stability required for the composite nonwoven fabric used as the raw material of the wet tissue can be improved.
The spunbond fiber immediately after being spun has a low elongation and a high strength in the machine direction (longitudinal direction) MD of the fiber, whereas a high elongation and a low strength in the cross direction of the CD. There is. In this case, the strength in the vertical and horizontal directions becomes unbalanced, and as a result, the strength of the wet tissue is reduced. Therefore, the spunbonded nonwoven fabric in the composite nonwoven fabric preferably has an elongation percentage in the transverse direction of 5% or less, more preferably 2% or less at a low load (0.5 N). This is a heat fusion process performed when manufacturing a spunbonded nonwoven fabric, and a spunbonded nonwoven fabric having a suppressed transverse elongation can be obtained by adjusting the arrangement of the heat fusion points.

The composite nonwoven fabric WP is manufactured so that the number of times by a wet (WET) Taber test specified in JIS satisfies 20 times or more. Thereby, the wear resistance required for the wet tissue is ensured.
The wet Taber test is performed by using a Taber tester specified in JIS L 1096, attaching a sample wet with water to a rotating horizontal disk, and using a pair of friction wheels (H-18) formed of an abrasive combined body. ) Was applied under a specified load (4.9 N), and the wear resistance was examined. The judgment was made based on the number of rotations of the disk until the hole of the sheet due to abrasion became 13 mm. The composite nonwoven fabric WP having the number of rotations of 20 or more was used as a raw material of the wet tissue.

Furthermore, by performing embossing on one side of the composite nonwoven fabric WP, it is possible to manufacture a nonwoven fabric that suppresses the generation of lint and improves wiping properties and texture. For example, an embossing process can be performed by additionally disposing an embossing device EA between the drying device 7 and the winding device 8 as indicated by an arrow AR in FIG.
The embossing device EA includes, for example, an embossing roll that contacts the pulp fiber web PFW side and a plain roll on the opposite side. On the outer peripheral surface of the embossing roll, an uneven pattern formed on the pulp fiber web PFW is engraved, and a heating means such as a heater is provided inside. On the other hand, the plain roll has a flat outer peripheral surface and is provided with a heating means like the emboss roll. By performing the one-sided embossing treatment on the pulp fiber web side in this way, the above-described generation of lint can be suppressed, and a nonwoven fabric with improved wiping properties and texture can be formed.
Desirably, the embossing roll and the plain roll are pressed against each other with a linear pressure of 20 to 70 kgf / cm, and the embossing roll is pressed in an uneven pattern with dot elements, and the pressing area ratio is 5 to 17%. Is desirable. Alternatively, it is preferable that the hollow ring-shaped element is pushed in with a pattern scattered in place of the dot element, the pushed area ratio is 10 to 30%, and the line width of the annular pattern is 0.5 to 2.0 mm.
As described above, it is preferable to provide an embossing device EA in addition to the nonwoven fabric manufacturing device of FIG. 1 from the viewpoint of cost. However, once the composite nonwoven fabric WP is wound around the roll 81, the embossing device EA provided separately is embossed offline. Processing may be performed.

In the composite nonwoven fabric WP according to the present invention, for example, it is preferable to form a pulp fiber web using pulp having an average pulp fiber length of 1.0 to 5.0 mm. Specifically, the pulp fiber web is preferably formed using fibers of softwood bleached kraft pulp (NBKP) selected from the group consisting of radiata pine, slash pine, southern pine, lodgepole pine, spruce and Douglas fir. . A pulp fiber web made of any one pulp fiber may be used, or a pulp fiber web formed by mixing two or more pulp fibers.
The synthetic fibers constituting the spunbonded nonwoven fabric can be selected from nylon, vinylon, polyester, acryl, polyethylene, polypropylene, polystyrene and the like, and it is preferable to use polypropylene.

  FIG. 2 is a diagram showing a wet tissue according to the present invention, and FIG. 2 (a) is a perspective view showing the appearance when the wet tissue TS is wrapped and prepared into a product package PG, and FIG. 2 (b). FIG. 4 is a side sectional configuration diagram shown so that the state of the wet tissue TS in the product package PG can be confirmed. FIG. 2 shows a state in which a lid HN that can be opened and closed is opened.

(Example)
The wet tissue shown in FIG. 2 is manufactured using the above-described composite nonwoven fabric as a raw material, for example, using the following chemical solution or the like. In addition, a wet tissue is prepared by preparing a composite nonwoven fabric as a raw material, folding the same, impregnating the nonwoven fabric with a chemical solution, cutting, and the like, and finally wrapping and finishing the product package PG shown in FIG. A known apparatus may be used.
Hereinafter, specific examples of the chemical solution and the like to be used will be given.
The chemical solution was impregnated at a ratio of 200 to 500 wt% or less based on the dry weight of the raw material to produce a wet tissue. The water holding capacity (TWA: Total Water Absorbency) of the raw material was 8.0 g / g or more and 14.0 g / g or less.

  The TWA was determined as follows. First, a nonwoven fabric is cut into a 75 × 75 mm square to prepare a sample piece, and the dry weight is measured. Next, after immersing the sample piece in distilled water for 2 minutes, one corner of the sample piece is set to the upper top in a steam-saturated vessel, and the top and the two adjacent corners are Is suspended in a stretched state (100% RH) and left for 30 minutes to measure the weight after draining. For draining, use a paper towel cut to 3 × 38 mm. Then, the measured value was converted to a water retention amount (g / g) per 1 g of the sample piece.

  The chemical solution may be set in order according to the application, but preferably contains a preservative for keeping the solution stably for a long time and a humectant for protecting the skin at the time of wiping.

  Preservatives include benzoic acid and its salts, chlorcresol, chlorobutanol, salicylic acid and its salts, sorbibic acid and its salts, dehydroacetic acid and its salts, trichlorohydroxydiphenyl ether, paraoxybenzoate and its sodium salt, phenoxyethanol, phenol , Sodium lauryl dianoethylglycine, resorcinol, isopropylmethiphenol, cetylpyridinium chloride, benzalkonium chloride, chlorhexidine hydrochloride, orthophenylphenol, chlorhexidine gluconate, and the like. These preservatives can be used alone or in combination of two or more. The amount of the preservative is preferably 0.1% by mass or more and 5.0% by mass or less based on the chemical solution.

As humectants, glycerin, polyhydric alcohols such as pentaerythritol, lactic acid, organic acids such as sodium pyrrolidonecarboxylate, urea, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, polyethylene glycol, Alkylene glycols such as diethylene glycol monoethyl ester, and lanolins such as natural fats and oils, long-chain fatty acids, fatty acid esters, lanolin, lanolin alcohol, polyoxyethylene beeswax, phospholipids, and ceramides that act as emollients for oil-soluble components And natural moisturizing ingredients such as aloe extract. These humectants can be used alone or in combination of two or more. The amount of the humectant is preferably 0.0001% by mass or more and 10.0% by mass or less with respect to the chemical.
In addition, the drug solution contains various components generally used in quasi-drugs and cosmetics, for example, alcohols such as ethanol and isopropanol, gelling agents, emulsifiers, thickeners, pH adjusters, sequestering agents, A surfactant, a stabilizer, a discoloration inhibitor, a fragrance, a colorant, and the like may be appropriately blended.

In the wet tissue manufactured as described above, the pulp fiber web and the spunbonded nonwoven fabric are set to a predetermined basis weight, the weight ratio of the pulp fiber web and the spunbonded nonwoven fabric is set in a predetermined range, and the fiber diameter of the spunbond is in a predetermined range. In addition, the manufacturing cost is reduced by adopting a composite nonwoven fabric which satisfies the condition that the elongation percentage in the lateral direction is kept low and the abrasion resistance by a predetermined Taber test is equal to or higher than a predetermined value as a raw material. It can be provided to users as a wet tissue product with excellent water retention, wet strength, appearance, texture and wiping properties.
By using a raw material of a composite nonwoven fabric in which an embossing treatment is further applied to the pulp fiber web side, it is possible to provide a wet tissue in which the generation of lint is suppressed and the feeling and wiping properties are further improved.
According to the manufacturing apparatus shown in FIG. 1, a composite nonwoven fabric serving as a raw material for wet tissue can be manufactured efficiently and at low cost.

  The description of the embodiment is finished above, but it is needless to say that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1 Nonwoven fabric manufacturing apparatus 2 Air laid apparatus 3 Spunbond nonwoven fabric supply apparatus 4 Suction apparatus 5 Water entanglement apparatus 6 Suction apparatus 7 Drying apparatus 8 Winding apparatus 21 Defibrating machine 22 Duct 23 Air laid hopper 24 Stacking position 28 Nipping roller 30 Prewetting apparatus 31 Spraying Nozzle 32 Suction device 41 Suction device main body 42 Suction part 43 Transport wire 51 Water jet head 52 Suction device 55 Transport wire SW Spunbond nonwoven fabric MD Fiber flow direction (vertical direction)
CD transverse direction PF pulp fiber PFW pulp fiber web PWeb Preliminary laminate (laminated web)
WP Composite non-woven fabric TD Transport direction

Claims (3)

In wet tissue which is a composite nonwoven fabric obtained by hydroentangling a spunbond nonwoven fabric and a pulp fiber web,
The pulp fiber web basis weight 15 g / ^{m 2} or more, and, the spunbonded nonwoven fabric is a a basis weight 8 g / ^{m 2} or more, the mass composition ratio of the spunbonded nonwoven fabric / pulp fiber web 15 / 85-50 / 50 (Wt%),
The fiber diameter of the resin fibers constituting the spunbonded nonwoven fabric is 0.6 to 5.6 decitex,
The spunbonded nonwoven fabric has an elongation of 5% or less in the transverse direction when a load of 0.5 N is applied in a transverse direction perpendicular to the fiber flow direction,
Further, the wet tissue has a wear resistance of at least 20 times in a wet Taber test specified by JIS.   The wet tissue according to claim 1, wherein the pulp fiber web side of the composite nonwoven fabric, in which the pulp fiber web is laminated on the spunbonded nonwoven fabric, is subjected to embossing. . A method for producing a composite nonwoven fabric used as a raw material of the wet tissue according to claim 1 or 2,
At least including a hydroentanglement step of hydroentanglement processing the spunbond nonwoven fabric and the pulp fiber web,
The hole diameter φ of the water jet nozzle that injects the water jet in the water entanglement step is 0.06 to 0.15 mm,
The method for producing a composite nonwoven fabric, wherein the water jet nozzles are arranged in three or more stages along the nonwoven fabric transport direction, and a driving pressure of the water jet is 10 MPa or more.

Images