JP7257767B2 - Manufacturing method of composite nonwoven fabric wiper - Google Patents

Description

The present invention relates to a composite nonwoven wiper obtained by hydroentangling a pulp fiber web and a spunbond nonwoven fabric, and a method for producing the same.

A wiper made of a composite nonwoven fabric containing a pulp fiber web and a spunbond nonwoven fabric is a nonwoven fabric having both liquid absorbency based on the pulp fiber and strength based on the spunbond nonwoven fabric, so it is an industrial wiper such as a waste cloth. , or as wipers for personal use such as tenugui and towels, and are widely used for various purposes.

For example, as disclosed in Patent Document 1, a pulp fiber web and a spunbond nonwoven fabric are laminated and then integrated by a hydroentangling treatment in which a high-pressure water jet is applied. Since the spunbond nonwoven fabric has excellent strength, it functions as a backing layer of the manufactured composite nonwoven fabric wiper. On the other hand, pulp fiber webs have an excellent liquid absorption function. Therefore, such a composite nonwoven fabric wiper is an excellent wiper that has both the advantages of a pulp fiber web that has good absorbency for both aqueous and oily liquids and the spunbond nonwoven fabric that has excellent strength. can be provided to consumers as

Japanese Patent No. 2533260

The spunbond nonwoven fabric used in Patent Document 1 and the like (referred to as a nonwoven continuous filament support in Patent Document 1) is widely obtained by spunbonding a synthetic resin such as polypropylene. Adopted. In the spunbonding process, spun resin fibers are connected to each other at a plurality of points by dot-like fused portions (hereinafter referred to as fused points). As a result, the spunbond nonwoven fabric develops sheet strength and maintains its outer shape.

The fusion point is a portion where the resin fibers are melted and solidified, and is an important component for obtaining the strength of the spunbond nonwoven fabric. However, the composite nonwoven fabric wiper obtained by hydroentangling the spunbond nonwoven fabric and the pulp fiber web as described above has the following disadvantages.
That is, when a composite nonwoven fabric wiper is produced by hydroentangling, the entanglement of the pulp fibers at the fusion points of the spunbond nonwoven fabric tends to be insufficient (pulp fibers are less likely to be entangled at the fusion points). Therefore, the larger the area of the fusion point of the spunbond nonwoven fabric, the more the parts where the pulp fiber entanglement is insufficient look like small holes. ) is inferior. On the other hand, if the fusion point area is small, the spunbond nonwoven fabric tends to stretch during processing, resulting in poor dimensional stability. As a result, there arises a problem that the processability of the spunbond nonwoven fabric is inferior.

Furthermore, wipers are strongly required to have liquid absorbency that can reliably wipe off water, oil, etc. Therefore, it is desirable to design a composite nonwoven fabric wiper containing a sufficient amount of pulp fiber web. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a composite nonwoven fabric wiper which is excellent in appearance and processing suitability and has sufficient liquid absorbency. Another object of the present invention is to propose a method for efficiently manufacturing the composite nonwoven fabric wiper.

The above object is a composite nonwoven fabric wiper in which a pulp fiber web is laminated and integrated on a spunbond nonwoven fabric, wherein the spunbond nonwoven fabric includes a plurality of fusion points connecting spun resin fibers. The area of one of the fusion points is 0.10 to 0.50 mm ² , and the area ratio of the fusion points is set to 7 to 20%, and the pulp fiber web basis weight is between 30 and 70 g/m ² .

The number of fusion points is preferably 10 to 150/cm ² .
Also, the fiber diameter of the fibers constituting the spunbond nonwoven fabric is preferably 0.6 to 5.6 decitex.

Further, the ratio by weight of the spunbond nonwoven fabric and the pulp fiber web, i.e., spunbond nonwoven fabric/pulp fiber web, is preferably 40/50 to 10/90 (wt %).

The above object is a method for manufacturing the composite nonwoven fabric wiper according to any one of the above, which comprises at least a hydroentanglement step of hydroentangling the spunbond nonwoven fabric and the pulp fiber web, wherein the hydroentanglement step comprises: It can also be achieved by setting the hole diameter φ of the water jet nozzle for injecting the water jet to 0.06 to 0.15 mm and the spacing of the water jet nozzles to 0.4 to 1.0 mm.

According to the present invention, it is possible to provide a composite nonwoven fabric wiper that is excellent in appearance and processing suitability and has sufficient liquid absorbency. Also, it is possible to provide an efficient method of manufacturing such a nonwoven wiper.

FIG. 2 is a schematic enlarged view for explaining the influence of the area of fusion points in the spunbond nonwoven fabric used for the composite nonwoven fabric wiper according to the present invention, and FIG. FIG. 3B is a diagram showing a nonwoven fabric wiper, and (b) is a diagram showing a composite nonwoven fabric wiper according to the present invention. FIG. 4 is a diagram showing the range in which the area and the area ratio of the fusion points of the spunbond nonwoven fabric have a favorable relationship. 1 is a view showing a manufacturing apparatus for a composite nonwoven fabric wiper according to the present invention; FIG.

A composite nonwoven fabric wiper according to an embodiment of the present invention will be described below with reference to the drawings. The composite nonwoven fabric wiper according to the present invention is a nonwoven fabric in which a pulp fiber web is laminated on a spunbond nonwoven fabric and integrated. Since the adopted spunbond nonwoven fabric has a characteristic structure, this structure will be described first with reference to FIG.

For comparison, FIG. 1(a) shows the case of manufacturing a composite nonwoven fabric wiper using a conventional spunbond nonwoven fabric SW. In the figure, the upper part shows the state of the hydroentanglement treatment. The spunbond nonwoven fabric SW and the pulp fiber web PFW placed thereon are transported along the web transport direction TD, and when they reach the hydroentangling device, a water jet WJ, which is a high-pressure water stream, is jetted. As a result, the pulp fibers forming the pulp fiber web PFW are entangled not only with each other but also with the fibers on the spunbond nonwoven fabric SW side, thereby promoting integration of the web.

The lower part of FIG. 1( a ) is a view showing the composite nonwoven fabric wiper WP after the hydroentanglement treatment is completed. The spunbond nonwoven fabric SW located on the lower side includes a wide portion and a narrow portion. Here, the narrow portion is a portion melted and solidified for bonding between fibers, that is, the aforementioned fusion point MP. The fusion point MP makes it difficult for the pulp fiber web PFW (pulp fibers PF forming the pulp fiber web PFW) to become entangled. If such a fusion point MP exists, it looks like a small hole as described above, resulting in a wiper with an inferior appearance. On the other hand, if the fusion point MP is too small, the dimensional stability is poor, resulting in a spunbonded nonwoven fabric SW that is inferior in processing suitability.

The inventors of the present invention have studied in detail the problems caused by the fusion points described above, and set the properties of the fusion points MP formed in the spunbond nonwoven fabric SW to within a predetermined range. The inventors have arrived at the present invention by confirming that the above can be obtained. FIG. 1(b) shows the case of manufacturing a composite nonwoven fabric wiper according to the present invention using a spunbond nonwoven fabric SW in which both the area of one fusion point and the area ratio are set within a predetermined range. there is 1(b) is shown in the same manner as FIG. 1(a), and the same reference numerals are used for the same portions.

As shown in FIG. 1(b), the composite nonwoven fabric wiper according to the present invention uses a spunbond nonwoven fabric SW formed with relatively small fusion points MP. As is clear from FIG. 1(b), the fusion point MP, which is a portion where the pulp fibers are difficult to entangle, becomes smaller and less conspicuous, and it can be expected that the fusion point MP is hidden by the surrounding pulp fibers.
Specifically, it is preferable to set the area (size) of one fusion point to 0.10 to 0.50 mm ² . The fusion points are an important factor in determining the strength of the spunbond nonwoven fabric, and the existence rate of the fusion points MP per unit area, that is, the area ratio, is preferably 7 to 20%. As a result, it is possible to suppress the occurrence of unfavorable elongation and ensure the necessary processing suitability. FIG. 2 shows the range in which the area of one fusion point and the area ratio described above have a favorable relationship. A spunbonded nonwoven fabric manufactured to be within the set rectangular range is adopted for the composite nonwoven fabric wiper according to the present invention. In FIG. 2, the rectangular shape indicating the preferred range is illustrated slightly larger so as to enclose the specific numerical values of the upper and lower limits described above.
The fusion point is preferably 10 to 150/cm ² per unit area.

(Example)
Further, regarding the composite nonwoven fabric wipers of Examples 1 to 5 and Comparative Examples 1 to 3 thereof, which were manufactured using the spunbond nonwoven fabric whose fusion points were set according to the above conditions, the following criteria were evaluated for appearance and processing suitability. evaluated with
Appearance evaluation: Small holes on the surface of the composite nonwoven fabric wiper (bonding points of spunbond nonwoven fabric are exposed)
It was evaluated by the presence or absence of the part where the
It was rated as particularly excellent (excellent ⊚), no problem in appearance (good ∘), and poor appearance with conspicuous small holes (improper x).
Processing suitability: Using the spunbond nonwoven fabric under the above conditions, a composite nonwoven fabric wiper is manufactured.
Dimensional stability and processability were evaluated.
Good dimensional stability and excellent processability (excellent ◎), satisfactory processability (good ◯), and poor dimensional stability and poor processability (poor x).

For Examples 1 to 5 and Comparative Examples 1 to 3, the area (mm ² ) of one fusion point, the area ratio (%), and the shape of the fusion point are set as shown in Table 1 below. Using a nonwoven fabric, a composite nonwoven wiper was produced by placing a pulp fiber web produced by an air-laid device thereon.

上記表１に示すように、実施例１～５は製品ワイパーとして提供できるものであるが、比較例１～３は外観評価、加工適正の評価のいずれかで不可であった。
上記実施例１～５によると、融着点の面積は相対的に小さい０．１１～０．５０ｍｍ^２であり、面積率については７．２～１９．７％である。前述した図２において、実施例１～５の位置を符号１～５を付して白い丸で示している。黒い丸は比較例である。
図２で設定した四角形状の範囲内に実施例１～５が入っており、融着点１個の面積が０．１０～０．５０ｍｍ^２、面積率７．０～２０．０％という条件を満たすスパンボンド不織布を採用するのが好ましいことが、これにより確認できる。
なお、融着点の形状を正方形、長方形、楕円形、円形等としたが、形状についての有意差は確認されなかった。

As shown in Table 1 above, Examples 1 to 5 can be provided as product wipers, but Comparative Examples 1 to 3 failed in either appearance evaluation or processing suitability evaluation.
According to Examples 1 to 5 above, the area of the fusion point is relatively small, 0.11 to 0.50 mm ² , and the area ratio is 7.2 to 19.7%. In FIG. 2 described above, the positions of Examples 1 to 5 are indicated by white circles with numerals 1 to 5 attached. Black circles are comparative examples.
Examples 1 to 5 are within the range of the square shape set in FIG ^. It can be confirmed from this that it is preferable to adopt a spunbond nonwoven fabric that satisfies the following:
The shapes of the fusion points were square, rectangle, ellipse, circle, etc., but no significant difference in shape was confirmed.

In the composite nonwoven fabric wiper of the present invention, the pulp fiber web is laminated on the spunbond nonwoven fabric satisfying the conditions described above to be integrated. The basis weight of the pulp fiber web used in this composite nonwoven fabric wiper is set to 30 to 70 g/m ² . As a result, the composite nonwoven fabric wiper of the present invention can be a composite nonwoven fabric wiper that not only has excellent appearance and processing suitability, but also has sufficient liquid absorbency.
The weight ratio of the spunbond nonwoven fabric to the pulp fiber web (spunbond nonwoven fabric/pulp fiber web) is preferably 40/60 to 10/90 (wt %).
It is preferable that the fibers constituting the spunbond nonwoven fabric have a fiber diameter of 0.6 to 5.6 decitex.
In the composite nonwoven fabric wiper according to the present invention, it is preferable to form the 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 bleached softwood kraft pulp (NBKP) selected from the group consisting of radiata pine, slash pine, southern pine, lodgepole pine, spruce and Douglas fir. . The pulp fiber web may be made of any one pulp fiber, or may be a pulp fiber web formed by mixing two or more pulp fibers.
Synthetic fibers constituting the spunbond nonwoven fabric can be selected from nylon, vinylon, polyester, acryl, polyethylene, polypropylene, polystyrene and the like, with polypropylene being preferred.

Hereinafter, a manufacturing apparatus suitable for manufacturing the above-described composite nonwoven fabric wiper according to the present invention will be further described with reference to the drawings.
First, the schematic configuration of the nonwoven fabric wiper manufacturing apparatus 1 will be described. The manufacturing apparatus 1 shown in FIG. 3 includes an airlaid device 2, a spunbond nonwoven fabric supply device 3 for supplying spunbond nonwoven fabric, and a suction device 4 on the upstream side. The suction device 4 is arranged to face the lower side of the air raid device 2 .
Downstream from these devices 2, 3, and 4 in the web transport direction TD are, in order from the upstream side, a hydroentangling device 5 that injects water jets for hydroentangling treatment, a suction device 6, and a drying device 7. are placed. Downstream of the drying device 7, there is further provided a winding device 8 for winding the continuously manufactured composite nonwoven fabric wiper WP.

The air-laid device 2 includes a defibrator 21 that defibrates the sheet-like raw material pulp RP in which the fibers are densely packed into pulp fibers, and an air blower (not shown) that feeds the defibrated pulp fibers PF to an air-laid hopper 23 . and a duct 22 for conveying.

An air raid hopper 23 is arranged downstream of the duct 22 . The air-laid hopper 23 is designed so that the disentangled pulp fibers descend while being dispersed, and are gradually piled up at a stacking position 24 set on the lower surface to form a pulp fiber web PFW.
A suction device 4 is arranged below the stacking position 24 so as to face it. 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 toward the stacking position 24 so as to apply a suction force (negative pressure) to the pulp fiber web PFW. have been set.
Note that FIG. 3 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 may be changed so that the air laid hopper 23 and the suction device main body 41 are arranged in two or more stages according to the basis weight (basis weight) and production speed of the pulp fiber web PFW.

A carrier wire 43 for carrying the web is arranged around the suction device 4 . The conveying wire 43 is arranged such that the pulp fiber web PFW on which the pulp fibers PF are piled up at the stacking position 24 can be placed thereon and is conveyed downstream. However, the pulp fiber web PFW is not placed directly on the conveying wire 43 . This will become clear in the description below.
The conveying wire 43 is formed with an open mesh (mesh) so that the suction force of the suction portion 42 extends to the opposite side (upper side).

Below the airlaid device 2 and upstream of the suction device 4, a spunbond nonwoven fabric supply device 3 is arranged. A spunbond nonwoven fabric SW prepared in advance is set in the form of a roll in the spunbond nonwoven fabric supply device 3 . That is, as described above, the spunbonded nonwoven fabric has a relatively smaller area than the conventional spunbonded nonwoven fabric, and the fibers are connected to each other by fusion points that satisfy the conditions that the area ratio is within a predetermined range. The bonded nonwoven fabric SW is in the form of a roll, which is pulled out from the spunbond nonwoven fabric supply device 3 and transported to the stacking position 24 on the transport wire 43 described above.
Further, it is preferable to adjust the weight ratio of spunbond nonwoven fabric/pulp fiber web to 40/60 to 10/90 (wt %).

The aforementioned pulp fiber web PFW is placed on the spunbond nonwoven fabric SW positioned at the stacking position 24 . At the stacking position 24, the suction force of the suction portion 42 of the suction device 4 passes through the conveying wire 43 and acts on the spunbond nonwoven fabric SW and the pulp fiber web PFW thereon. Therefore, a preliminary laminate PWeb (laminated web) in which the spunbond nonwoven fabric SW and the pulp fiber web PFW are laminated is conveyed downstream.
By controlling the supply amount of the pulp fiber web PFW onto the spunbond nonwoven fabric SW when the preliminary laminate PWeb is formed as described above, the pulp contained in the composite nonwoven fabric wiper manufactured by this apparatus is The basis weight of the fiber web PFW is designed to be 30-70 g/m ² . For the basis weight of the pulp fiber web PFW, the basis weight of the pulp fiber web PFW of the manufactured composite nonwoven fabric wiper is checked by appropriately adjusting the web conveying speed, the supply amount of the pulp fiber web PFW per hour, and the like. Then, the grammage may be set in a desired range.

The above-described preliminary laminate PWeb is suction-compressed by the suction force of the suction device 4, so that the laminated state is maintained. At this time, the fibers of the upper pulp fiber web PFW are in a densified state. However, if the preliminary laminate PWeb is transported into the hydroentangling device 5 on the downstream side as it is, there is a risk that some of the pulp fibers PF will be blown up by water jets (high-pressure water streams).
Therefore, in the present manufacturing apparatus 1, nipping rollers 28 for sandwiching the preliminary laminate PWeb from above and below to stabilize the state of placement of the pulp fiber web PFW on the spunbond nonwoven fabric SW, and upstream of the hydroentangling device 5 A pre-wetting device 30 is provided on the side to apply water to prevent scattering of fibers. The pre-wetting device 30 preferably applies a suction force from a spray nozzle 31 that sprays water mist from above the preliminary laminated body PWeb and from the lower side of the preliminary laminated body PWeb (that is, the lower surface of the pulp fiber web PFW). and a suction device 32 .

Although FIG. 3 illustrates the case where the prewetting device 30 is provided as a new device in front of the hydroentangling device 5 as described above, the present invention is not limited to this. Among a plurality of sets each including a water jet head 51 and a suction device 52 (to be described later) included in the hydroentangling device 5 , the design may be changed such that the head set is used as the prewetting device 30 . In this case, adjustment should be made so that low-pressure water mist is sprayed from the leading water jet head 51 .
In the case of the hydroentangling device 5 in which the number of sets of the water jet head 51 and the suction device 52 sufficient to perform the hydroentanglement treatment is ensured, the top water jet head 51 and the suction device 52 are preliminarily set as described above. Utilizing it as a wet device is effective in suppressing the equipment cost.

Then, in the hydroentangling device 5, a high-pressure water jet is blown onto the preliminarily laminated body PWeb that has been treated by the nipping roller 28 and the prewetting device 30 serving as a pretreatment unit, thereby promoting the entangling of the pulp fibers. This promotes integration of the upper pulp fiber web PFW layer and the lower spunbond nonwoven fabric SW layer (hydroentanglement treatment).
The hydroentangling device 5 exemplarily shown in FIG. 3 has water jet heads 51 arranged in multiple stages (four stages are illustrated in FIG. 3) along the transport direction TD.
Although FIG. 3 does not show the nozzles provided in the water jet head 51 extending in the direction perpendicular to the transport direction TD (the width direction of the web), a plurality of water jets are arranged in the width direction. A jet nozzle is placed at an appropriate position. The hole diameter φ of this water jet nozzle is preferably 0.06 to 0.15 mm. Also, the interval between the water jet nozzles is preferably 0.4 to 1.0 mm.

It is desirable to set the water pressure during the hydroentangling treatment in consideration of the basis weights of the pulp fiber web PFW and the spunbond nonwoven fabric SW. For example, it is preferable to select in the range of 1 to 30 MPa.

A suction device 52 is arranged so as to face the water jet head 51 . While blowing a high-pressure water jet from a water jet head 51 onto the pulp fiber web PFW positioned above, the suction force of a suction device 52 is applied to the lower side of the spunbond nonwoven fabric SW positioned below. Due to the cooperative action of the water jet head 51 and the suction device 52, the pulp fibers on the pulp fiber web PFW side enter the lower spunbond nonwoven fabric SW, or penetrate the spunbond nonwoven fabric SW to reach the opposite side. It is presumed that such a state is formed. Its action promotes the integration of the two layers.

A carrier wire 55 is also arranged in the hydroentangling device 5 . A transport wire 55 receives the preliminary laminate PWeb downstream of the pretreatment stations 28 , 30 and transports it into the hydroentangling device 5 . The carrier wire 55 is arranged to pass between the water jet head 51 of the hydroentangling device 5 and the suction device 52 from the upstream side to the downstream side.
Therefore, the preliminary laminate PWeb conveyed on the conveying wire 55 is subjected to more hydroentangling treatment as it goes downstream in the conveying direction TD, and when it leaves the hydroentangling device 5, the upper pulp fibers Sufficient entangling treatment is realized between the web PFW layer and the lower spunbond nonwoven fabric SW layer.
The nonwoven fabric immediately after leaving the hydroentangling device 5 is in a wet state, and the bonds between the pulp fibers are not sufficiently established.

Therefore, as shown in FIG. 3, on the downstream side of the hydroentangling device 5, there is a suction device 6 and a drying device for removing moisture remaining in the web by suction and drying the web to complete the production of the nonwoven fabric wiper WP. A device 7 is provided. By performing dehydration and drying by the suction device 6 and the drying device 7 in the latter stage of the production of the nonwoven fabric wiper WP, the nonwoven fabric can be efficiently produced, and the nonwoven fabric after hydroentanglement can be produced without applying a large external pressure. Since a dry nonwoven fabric can be produced, a bulky product can be finished.
The suction device 6 dewaters the hydroentangled nonwoven fabric by, for example, a vacuum system. The drying device 7 preferably employs a non-compression type dryer, preferably an air-through dryer. In FIG. 3, a rotatable dryer body 71 of the air-through dryer is a cylindrical body, and has a large number of through-holes on its peripheral surface. It is preferable to adopt a configuration in which the air is sucked in toward the side.
The composite nonwoven fabric wiper WP continuously produced in this manner is wound around the roll 81 of the winding device 8 to complete a series of steps.

According to the nonwoven fabric wiper manufacturing apparatus 1 described above, it is possible to efficiently manufacture the composite nonwoven fabric wiper according to the present invention, which is excellent in appearance and processing suitability and has sufficient liquid absorbency.
In the manufacturing apparatus shown in FIG. 3, the pulp fiber web is obtained by defibrating and gradually laminating the pulp fibers using the air-laid device 2 . The pulp fiber web can be manufactured by applying the manufacturing method of the wet papermaking sheet, but if the pulp fiber web is manufactured by the dry process using the airlaid device 2 as described above, the manufacturing equipment can be simplified and the present invention can be more efficiently produced. A composite nonwoven wiper according to the invention can be manufactured.

Although the description of the embodiments is finished above, the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

1 nonwoven fabric wiper manufacturing device 2 airlaid device 3 spunbond nonwoven fabric supply device 4 suction device 5 hydroentangling device 6 suction device 7 drying device 8 winding device 21 defibrator 22 duct 23 airlaid hopper 24 stacking position 28 pinching roller 30 prewetting device 31 Spray nozzle 32 Suction device 41 Suction device main body 42 Suction unit 43 Transfer wire 51 Water jet head 52 Suction device 55 Transfer wire SW Spunbond nonwoven fabric MP Fusion point PF Pulp fiber PFW Pulp fiber web PWeb Preliminary laminate (laminated web)
WP Composite type nonwoven wiper TD Conveying direction

Claims (4)

A composite nonwoven fabric wiper in which an air-laid pulp fiber web is laminated and integrated on a spunbond nonwoven fabric,
The spunbond nonwoven fabric is formed to include a plurality of fusion points connecting spun resin fibers, and the area of each fusion point is 0.10 to 0.50 mm ² , and The area ratio of the fusion points is set to 7 to 20%,
A method for producing a composite nonwoven fabric wiper, characterized in that the pulp fiber web has a basis weight of 30 to 70 g/m ² ,
including at least a hydroentangling step of hydroentangling 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 hydroentanglement step is 0.06 to 0.15 mm, and the interval between the water jet nozzles is 0.4 to 1.0 mm,
Further comprising a pre-wetting step of applying moisture for preventing fiber scattering before the hydroentangling step,
A method for producing a composite nonwoven fabric wiper, characterized by : The method for producing a composite nonwoven fabric wiper according to claim 1, wherein the number of said fusion points is 10-150/cm ² . 3. The method for producing a composite nonwoven fabric wiper according to claim 1 or 2, wherein the fibers constituting said spunbond nonwoven fabric have a fiber diameter of 0.6 to 5.6 decitex. The weight composition ratio of the spunbond nonwoven fabric and the pulp fiber web, that is, the spunbond nonwoven fabric/pulp fiber web, is 40/50 to 10/90 (wt%). A method for producing a composite nonwoven fabric wiper according to any one of the above.

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