JP2019166142A - Non-woven fabric sheet for cleaning and method for manufacturing the same - Google Patents

Abstract

To provide a non-woven fabric sheet for cleaning with less fluff coming-off, and a method for manufacturing the non-woven fabric sheet for cleaning with less fluff coming-off.SOLUTION: A non-woven fabric sheet 10 for cleaning has a base fabric 11, and a first surface layer 12 and a second surface layer 13 for sandwiching the base fabric. In the non-woven fabric sheet, the first surface layer and the second surface layer have the same fiber configuration, and at least a portion of fibers 14 penetrates through the base fabric to thereby be connected mechanically. Fiber webs are layered on one side of the base fabric, a needle is pierced from the fiber web side by a needle-punch method, the fibers in the fiber webs are entangled, and thereby the first surface layer is formed. Also, at least a portion of the fibers of the fiber webs is penetrated through the base fabric, and a second surface layer is formed on the surface of the side opposite to the first surface layer of the base fabric.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a nonwoven fabric sheet used for cleaning floors, kitchen sinks, ranges, ovens, ventilation fans, furniture, electrical appliances and the like.

  Nonwoven fabric sheets are frequently used as household or commercial cleaning sheets. For example, Patent Document 1 includes a nonwoven fabric obtained by mixing ultrafine fibers with a predetermined fineness obtained by dividing an easily splittable composite fiber and non-split fibers with a predetermined fineness at a predetermined ratio. A cleaning sheet is described. Thereby, both a feeling of use and a cleaning effect are satisfied, and a reasonable cleaning sheet can be provided in terms of cost. Patent Document 2 describes a cleaning sheet in which a scraping layer in which abrasive particles are detachably present in a space between large diameter fibers and a water absorbing layer containing pulp fibers are laminated. Yes. As a result, a large amount of abrasive particles are quickly released onto the surface to be cleaned, so that dirt can be removed quickly and reliably.

JP 2010-259633 A JP 2017-131676 A

  As a problem of the nonwoven fabric sheet for cleaning, it is required to reduce fluff loss during use. In particular, when removing strongly sticking dirt, the sheet is easily pressed against the dirty part to wipe it off, so that the fibers constituting the sheet are easy to fall off. However, conventional nonwoven fabric sheets for cleaning have insufficient measures to prevent fluff coming off. For example, Patent Document 2 exemplifies fusion, adhesion using an adhesive, and sewing as means for integrating the scraping layer and the water absorption layer. It was small.

  This invention is made | formed in view of the above, and it aims at providing the manufacturing method of the nonwoven fabric for cleaning with few fluff missing, and the nonwoven fabric for cleaning with little fluff missing.

  The nonwoven fabric for cleaning of the present invention has a base fabric and a first surface layer and a second surface layer sandwiching the base fabric. The first surface layer and the second surface layer have the same fiber configuration, and at least some of the fibers are mechanically bonded by penetrating the base fabric.

  Here, the first surface layer and the second surface layer have the same fiber configuration means that the components, shapes, fineness, and lengths of the fibers constituting both layers are the same, and both layers contain a plurality of types of fibers. When it contains, it means that the mixing ratio is also the same.

  According to this configuration, the first surface layer, the base fabric, and the second surface layer are firmly integrated by the fibers that pass through the base fabric and straddle the first surface layer and the second surface layer. It becomes a nonwoven fabric sheet for cleaning with less fluff.

  Preferably, the first surface layer and the second surface layer include odd-shaped cross-section fibers and / or split fibers and polyolefin fibers. Thereby, the wiping-off property and oil absorption property of the dirt by the first surface layer and the second surface layer can be improved.

  Preferably, the base fabric is a nonwoven fabric containing polyolefin fibers. Preferably, the base fabric is a spunlace nonwoven fabric, a spunbond nonwoven fabric, or a thermal bond nonwoven fabric. More preferably, the base fabric is a spunlace nonwoven fabric, a spunbond nonwoven fabric or a thermal bond nonwoven fabric containing polyolefin fibers. As a result, the number of fibers penetrating the base fabric can be increased, and the bond strength between the base fabric and the fibers penetrating the base fabric can be increased, so that fluff can be further reduced.

  In the method for producing a nonwoven fabric sheet for cleaning according to the present invention, a fiber web is overlapped on one side of a base fabric, a needle is pierced from the fiber web side by a needle punch method, and the fibers in the fiber web are entangled. In addition to forming a layer, at least a part of the fibers in the fibrous web are passed through the base fabric to form a second surface layer on the surface of the base fabric opposite to the first surface layer.

  According to the cleaning nonwoven fabric sheet or the cleaning nonwoven sheet manufacturing method of the present invention, at least part of the fibers of the first surface layer and the second surface layer sandwiching the base fabric penetrate the base fabric, The second surface layer is mechanically bonded. As a result, the first surface layer, the base fabric, and the second surface layer are firmly integrated, and fluff from the first surface layer and the second surface layer is reduced.

It is a cross-sectional schematic diagram which shows the structure of the nonwoven fabric for cleaning of one Embodiment of this invention.

  First, the structure of the nonwoven fabric sheet for cleaning which is one Embodiment of this invention is demonstrated.

  With reference to FIG. 1, the nonwoven fabric sheet 10 for cleaning of this embodiment is a composite nonwoven fabric which has the base fabric 11, and the 1st surface layer 12 and the 2nd surface layer 13 which pinch | interpose a base fabric. The first surface layer and the second surface layer have the same fiber configuration. The first surface layer and the second surface layer are mechanically coupled by having at least some of the fibers 14 penetrate the base fabric. Hereinafter, the fibers 14 penetrating the base fabric are referred to as “penetrating fibers”.

  As the base fabric 11, a nonwoven fabric can be used conveniently. In order for the first surface layer 12, the base fabric, and the second surface layer 13 to be firmly integrated, the number of the through fibers 14 is large, and the individual through fibers are entangled with the fibers of the base fabric and strongly bonded. It is desirable to do. For that purpose, it is desirable that the porosity of the base fabric is moderately low and that there is no hard region in the base fabric that inhibits the penetration of the through fibers. From this point, when using a nonwoven fabric as the base fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric or a thermal bond nonwoven fabric is preferably used. It is because it does not have the area | region which prevents penetration of penetration fibers, such as a hardened adhesive. Moreover, compared with other nonwoven fabrics, such as a needle punch nonwoven fabric, it is easy to obtain what has a low porosity and is strongly bonded to the through fibers. More preferably, a spunbond nonwoven fabric is used as the base fabric. This is because the workability of wiping with the non-woven fabric sheet 10 for cleaning is improved.

  The thickness of the base fabric is preferably 0.1 to 0.5 mm. This is because if the base fabric is too thin, the bonding with the penetrating fibers 14 becomes weak and the effect of improving the wiping workability is small. On the other hand, if the base fabric is too thick, it becomes difficult to penetrate the through fibers at the time of manufacture, and the cleaning nonwoven fabric sheet 10 becomes hard, so that the wiping workability is lowered.

  The base fabric 11 preferably contains polyolefin fibers, more preferably 90% by weight or more is made of polyolefin fibers, and particularly preferably all is made of polyolefin fibers. This is because it is highly lipophilic. The fineness of the fibers constituting the base fabric is preferably 1.0 to 10 dtex. This is because if the fineness is too small, the voids are narrow and it is difficult to penetrate the through fibers. On the other hand, if the fineness is too large, the entanglement with the penetrating fibers becomes insufficient.

  The first surface layer 12 and the second surface layer 13 are nonwoven fabric layers in which fibers are entangled with each other by a needle punch method. The first surface layer and the second surface layer have the same fiber configuration. That is, the component, shape, fineness, and length of the fibers constituting both layers are the same, and when both layers include a plurality of types of fibers, the mixing ratio is also the same.

  The first surface layer 12 and the second surface layer 13 are mechanically coupled by the through fibers 14 while being on different surfaces of the base fabric 11. The penetrating fibers pass through the base fabric and exist across the first surface layer and the second surface layer, and the first surface layer and the second surface layer are entangled with other fibers, respectively. Thereby, a 1st surface layer, a base fabric, and a 2nd surface layer are integrated firmly. Of the fibers contained in both surface layers, 5% by weight or more, more preferably 10% by weight or more, and particularly preferably 20% by weight or more of the fibers become the penetrating fibers 14.

  The first surface layer 12 and the second surface layer 13 preferably include irregular cross-section fibers and / or split fibers. This is because the dirt wiping property (hereinafter simply referred to as “wiping property”) is improved. A plurality of types of irregular cross-section fibers and split fibers may be mixed and used.

  The cross section of the irregular cross-section fiber is not particularly limited. The irregular cross-section fibers are polyolefin fibers, nylon fibers, acrylic fibers, and polyester fibers. The profile cross-section fiber is preferably a polyester fiber. This is because the wiping property is further improved by scraping off the dirt due to the high hardness.

  The fineness of the modified cross-section fiber is preferably 1 to 5 dtex. This is because if the fineness is too small, the wiping property is poor. On the other hand, if the fineness is too large, the cleaning surface may be damaged. The length of the modified cross-section fiber is preferably 35 to 80 mm. This is because if the fibers are too short, fluff can be easily removed when the nonwoven fabric for cleaning 10 is used. On the other hand, if the fiber is too long, the openability at the time of manufacture is deteriorated.

  As the split fibers, those composed of polyolefin fibers and nylon fibers, polyester fibers and nylon fibers, polyolefin fibers and polyester fibers can be used, and more preferably composed of polyolefin fibers and polyester fibers. When the divided fibers are divided, the fibers become ultrafine fibers, the oil absorption is improved by capillary action, and the wiping property is improved by the deformed shape after the division. The fineness of the split fibers is preferably 1 to 5 dtex. This is because if the fineness is too small, the spreadability at the time of production is deteriorated. Moreover, if the fineness is too large, the cleaning surface may be damaged. The length of the split fibers is preferably 35 to 80 mm. This is because if the fibers are too short, fluff can be easily removed when the nonwoven fabric for cleaning 10 is used. Moreover, it is because the opening property at the time of manufacture will worsen when a fiber is too long.

  The first surface layer 12 and the second surface layer 13 preferably contain polyolefin fibers. This is because it is highly lipophilic. As the polyolefin fiber, a single component of a polypropylene (PP) fiber or a polyethylene (PE) fiber, a core-sheath type, or a parallel type fiber can be suitably used. A plurality of types of polyolefin fibers may be mixed and used.

  The fineness of the polyolefin fiber is preferably 0.5 to 10 dtex, more preferably 1 to 5 dtex. This is because if the fineness is too small, the spreadability at the time of production is deteriorated. On the other hand, if the fineness is too large, the cleaning surface may be damaged. The length of the polyolefin fiber is preferably 15 to 100 mm, more preferably 35 to 80 mm. This is because if the fibers are too short, fluff can be easily removed when the nonwoven fabric for cleaning 10 is used. On the contrary, if the fiber is too long, the openability at the time of manufacture is deteriorated.

  In the case of using a mixture of odd-shaped cross-section fibers and / or split fibers and polyolefin fibers, the content of the polyolefin fibers among fibers contained in the first surface layer 12 and the second surface layer 13 is 20% by weight or more. Is preferred. This is to obtain sufficient lipophilicity. Moreover, it is preferable that the total content rate of an irregular cross-section fiber and a division | segmentation fiber among the fibers contained in the 1st surface layer 12 and the 2nd surface layer 13 is 20 to 80 weight%. This is because if the content of the irregularly shaped cross-section fibers and the split fibers is too small, the effect of scraping off dirt cannot be obtained sufficiently. On the other hand, if the content of the irregularly shaped cross-section fibers and the split fibers is too large, the fluff is easily removed. When the irregular cross-section fiber is made of polyolefin or when the split fiber contains polyolefin, the polyolefin component is calculated by including both the content of the irregular cross-section fiber and split fiber and the content of the polyolefin fiber.

  The first surface layer 12 and the second surface layer 13 may contain other fibers in addition to the irregular cross-section fiber, the split fiber, and the polyolefin fiber. In that case, the mixing ratio of the other fibers is preferably 50 parts by weight or less, more preferably 20 parts by weight or less, with respect to 100 parts by weight in total of the irregular cross-section fiber, split fiber, and polyolefin fiber. Particularly preferably, the first surface layer and the second surface layer do not contain fibers other than irregularly shaped cross-section fibers, split fibers, and polyolefin fibers.

  In addition, although the 1st surface layer 12 and the 2nd surface layer 13 have the same fiber structure, each fabric weight and thickness may differ.

The basis weight of the entire cleaning nonwoven sheet 10 is preferably 60 g / m ² or more, more preferably 120 g / m ² or more. This is because if the basis weight of the nonwoven fabric sheet for cleaning is too small, the amount of oil retained is reduced. On the other hand, the basis weight of the entire nonwoven fabric sheet for cleaning is preferably 300 g / m ² or less, more preferably 200 g / m ² or less. This is because if the basis weight of the nonwoven fabric for cleaning is too large, the texture of the sheet becomes stiff and the cost increases.

  The manufacturing method of the nonwoven fabric sheet 10 for cleaning of this embodiment is as follows. A fiber web from which the base fabric 11, the first surface layer 12, and the second surface layer 13 are based is prepared, and the fiber web is stacked on one side of the base fabric. A needle is pierced from the fiber web side by a needle punch method. Depending on the structure of the needle punching machine, the needle may be pushed up, down, or up and down, but at least from the fiber web side. As a result, the fibers in the fiber web are entangled to form the first surface layer. At the same time, at least a part of the fibers contained in the fiber web penetrates the base fabric, and the second surface layer is formed on the side opposite to the first surface layer of the base fabric. As a result, a cleaning nonwoven fabric sheet having a three-layer structure of the first surface layer, the base fabric, and the second surface layer is obtained. The fibers are entangled with each other at the boundary between the first surface layer and the base fabric and at the boundary between the base fabric and the second surface. Further, the first surface layer and the second surface layer are mechanically coupled by the penetrating fibers 14.

The nonwoven fabric for cleaning of an Example and a comparative example was produced using the base fabric and various fibers. In the following, the first alphanumeric character of each material represents an abbreviation used in this specification.
The used base fabric 11 is as follows.
SB: Mitsui Chemicals, PS-103 (PP single component, spunbond thermal bonding),
Weight per unit area 16g / m ² , thickness 0.18mm
The irregular cross-section fibers used for forming the first surface layer 12 and the second surface layer 13 are as follows.
MC: Toray Industries, Inc., Pentas T1281 (PET irregular cross section),
Fineness 1.7dtex, fiber length 51mm
The split fibers used for forming the first surface layer and the second surface layer are as follows.
S7: Daiwabo Polytech Co., Ltd., DF-7 (PP / PE split fiber),
Fineness 2.0dtex, fiber length 51mm
SS: Daiwabo Polytech Co., Ltd., DFS (SH) (PET / PE split fiber),
Fineness 2.2dtex, fiber length 51mm
The polyolefin fibers used for forming the first surface layer and the second surface layer are as follows.
PC1: Chisso Corporation, ESC016 (core PP / sheath PE),
Fineness 1.1dtex, fiber length 38mm
PC2: Chisso Corporation, ESC023 (core PP / sheath PE),
Fineness 2.2dtex, fiber length 51mm
PF: Ube Eximo Co., Ltd., HR-FX (core PP / sheath PE),
Fineness 2.2dtex, fiber length 51mm
・ PL2: Ube Eximo Co., Ltd., HR-LE (core PP / sheath PE),
Fineness 2.2dtex, fiber length 38mm
・ PL6: Ube Eximo Co., Ltd., HR-LE (core PP / sheath PE),
Fineness 6.6dtex, fiber length 64mm
・ PN: Ube Eximo Co., Ltd., NC (PP single component),
Fineness 2.2dtex, fiber length 51mm
・ PS: Ube Eximo Co., Ltd., SW (PP / PP latent crimp),
Fineness 2.2dtex, fiber length 44mm
PD: Daiwabo Polytech Co., Ltd., PP (PZ) (PP single component),
Fineness 5.6dtex, fiber length 76mm

  The nonwoven fabrics for cleaning of Examples 1 to 4 were produced by the following method. A fiber web produced by a card method using predetermined fibers was stacked on a base cloth and placed on a table of a needle punch machine, and needles were pierced from above with a predetermined density (number of strokes) and depth. Thereafter, heat treatment was performed at a predetermined temperature and time. Thereby, the 1st surface layer was formed in the upper side of the base fabric, and the 2nd surface layer was formed in the lower side, and the nonwoven fabric sheet for cleaning of 3 layer structure was obtained.

  The nonwoven fabrics for cleaning of Comparative Examples 1 to 10 were produced in the same manner as in Examples 1 to 4, but without using a base fabric. That is, a fiber web produced by a card method using predetermined fibers is placed on a table of a needle punch machine, pierced with needles at a predetermined density and depth from above, and then heat treated at a predetermined temperature and time. Thus, a nonwoven fabric sheet for cleaning composed of a single layer was obtained.

The obtained nonwoven fabric sheet for cleaning was evaluated by the following method and criteria.
-Flat part wiping property 8g of cooking oil was hung on the plastic board, and the dirt for a test was formed. This was wiped off with the sheet of Example or Comparative Example, and the state of the wiping surface was visually observed.
X: Cannot be wiped off.
(Triangle | delta): Although it can wipe off partially, dirt remains.
○: Can be wiped off, no dirt remains, but must be rubbed strongly, resulting in scratches on the wiping surface.
A: Wipe off without rubbing strongly, no dirt remains, and the wiping surface is not scratched.
-Fluff removal During or after the above wiping test, fluff removal (fiber loss) on the wiping surface was visually observed.
X: There is always fluff during the test.
Δ: Cannot be confirmed during the test, but fluff can be confirmed after the test.
○: When rubbed strongly during the test, fluff can be confirmed after the test.
A: There is no fluffing even when rubbed strongly during or after the test.
-Oil absorption property 3 mL of edible oil is dripped with a dropper to the sheet | seat of the Example and comparative example which left still on the work table. Thereafter, the sheet was picked up, and oil transfer to the inside of the sheet and on the work table was visually observed.
X: Almost not stayed in the sheet, but moved to the work table.
Δ: Some remain in the seat, but most move on the workbench.
○: Most of it is absorbed in the seat, but a part moves to the work table.
A: Almost completely absorbed in the sheet and does not move to the work table.
-Corner part wiping property 24 g of cooking oil was applied to the inside of a container (lunch box) having a volume of 940 mL (length: 11.5 cm x width: 16.5 cm x height: 5 cm) to form a test stain. This was wiped off with the sheet of Example or Comparative Example, and the state of the wiping surface was visually observed to confirm the tactile sensation.
X: It can be confirmed that it has not been wiped off visually.
(Triangle | delta): Although it wiped off, it turns out that dirt remains visually.
○: Although no dirt remains visually, it can be seen that dirt remains due to touch.
A: The remaining dirt cannot be confirmed visually or by touch.

  About some sheets of Examples 1-4 and the comparative example, the oil absorption amount was measured. Oil absorption is measured by cutting the sheet into 10cm x 10cm, immersing it in cooking oil for 10 hours, holding the upper side in the room and hanging it vertically until the oil stops dripping and measuring the weight of the sheet The rate of increase from the previous weight was determined.

  Table 1 shows the production conditions and evaluation results of the sheets of Examples 1 to 4 and Table 2 of Comparative Examples 1 to 10. The mixing ratio of the fibers in the table indicates% by weight. Further, the depth of the needle punch indicates the distance at which the needle protrudes from the upper surface of the table, that is, the lower surface of the base fabric in the embodiment and the lower surface of the fiber web in the comparative example. The heat treatment temperature indicates the temperature in an air-through heat treatment apparatus.

  In the nonwoven fabric sheet for cleaning of Examples 1-4, the ratio of the thickness of the first surface layer and the second surface layer was approximately 80:20 to 70:30. From this, it is considered that about 20 to 30% by weight of the fibers contained in both surface layers are penetrating fibers existing across both surface layers.

  From Table 1 and Table 2, when Examples 1 to 3 are compared with Comparative Examples 1 to 3, respectively, it can be seen that fluff loss is reduced by using the base fabric. Moreover, it is thought that the wipeability of the corner part has improved by using a base fabric, and the base fabric has the effect of strengthening the waist of the sheet as a core material. Comparative Examples 4 and 5 differ from Comparative Examples 1 to 3 in that the mixing ratio of the modified cross-section fiber and the polyolefin fiber is different, but shows the same wiping property (flat portion and corner portion) and oil absorption, and the base fabric is used. For example, it is considered that the same performance as in Examples 1 to 3 is obtained.

  When Example 4 is compared with Comparative Examples 8 to 10, there are portions where the production conditions are different, but it can also be seen that fluffing is reduced by using the base fabric. Moreover, the wiping property of a flat part and a corner part is improving, and it is thought that the base fabric had the effect of strengthening the waist of a sheet | seat as a core material similarly to Examples 1-3. When comparing Comparative Examples 8 to 10 with Comparative Examples 1 to 7, the numerical value of the oil absorption amount is not so inferior, but the oil absorption evaluation is low. This is because the oil absorption increased due to the capillary phenomenon caused by the divided ultrafine fibers, but the oil absorption was lowered due to the oil transfer.

  As described above, the nonwoven fabrics for cleaning of Examples 1 to 4 were excellent in wiping off dirt on the flat part, oil-absorbing, and wiping off dirt on the corner part, and had less fluffing.

  In order to optimize the fibers constituting the first surface layer and the second surface layer, the sheets of Comparative Examples 11 to 17 were produced and evaluated by the same method as Comparative Examples 1 to 10. Table 3 shows fabrication conditions and evaluation results.

  From Table 2 and Table 3, the sheet | seat (Comparative Examples 1-10 of Table 1 and Comparative Examples 13, 14, 16, and 17 of Table 2) containing an irregular cross-section fiber or a division | segmentation fiber does not contain (Comparative example of Table 2). 11, 12, 15), it can be seen that the wiping property (flat portion and corner portion) is excellent. In Comparative Examples 11-13, the wiping property of the flat part of Comparative Example 13 is excellent, which is considered to be an effect of the modified cross-section fiber.

  In order to examine the effect when two types of fiber webs were bonded by the needle punch method without using a base fabric, the sheets of Comparative Examples 18 to 20 were produced and evaluated as follows. The first web prepared by the card method using predetermined fibers is stacked on top of the second web prepared by the card method using predetermined fibers, and placed on the table of the needle punch machine. The needle was pierced from above with a predetermined density and depth, and then heat treated at a predetermined temperature and time to obtain a cleaning nonwoven sheet with a two-layer structure.

  Table 4 shows the production conditions and evaluation results of Comparative Examples 18-20. In the sheets of Comparative Examples 18 to 20, it is assumed that the upper layer mainly bears oil absorbency and the lower layer bears wiping properties. In the evaluation test, the surface of the lower layer was applied to dirt.

  The sheets of Comparative Examples 18 to 20 were prepared by using two fiber webs, and the upper layer and the lower layer were entangled and bonded to each other at the boundary, but the fluff was not improved much. From this result, it is not sufficient to simply overlap the cotton-like fiber webs and bond them with a needle punch or the like to significantly reduce fluff loss. It was confirmed that it was effective to penetrate the fibers from one side and form the second surface layer on the opposite side of the base fabric.

  The present invention is not limited to the above-described embodiments and examples, and various modifications are possible within the scope of the technical idea.

  For example, although a spunbond nonwoven fabric is used as the base fabric in the examples, the same effect can be obtained even when a spunlace nonwoven fabric or a thermal bond nonwoven fabric is used as the base fabric.

DESCRIPTION OF SYMBOLS 10 Cleaning nonwoven fabric 11 Base fabric 12 1st surface layer 13 2nd surface layer 14 Fiber which penetrates base fabric

Claims (8)

With the base fabric,
A first surface layer and a second surface layer sandwiching the base fabric;
The first surface layer and the second surface layer have the same fiber configuration, and at least some of the fibers are mechanically bonded by penetrating the base fabric,
Nonwoven sheet for cleaning. The first surface layer and the second surface layer include irregular cross-section fibers and / or split fibers, and polyolefin fibers;
The nonwoven fabric sheet for cleaning according to claim 1. The base fabric is a nonwoven fabric containing polyolefin fibers,
The nonwoven fabric sheet for cleaning according to claim 1 or 2. The base fabric is a spunlace nonwoven fabric, a spunbond nonwoven fabric or a thermal bond nonwoven fabric,
The nonwoven fabric sheet for cleaning as described in any one of Claims 1-3. Put the fiber web on one side of the base fabric,
A needle is pierced from the fiber web side by a needle punch method, and the fibers in the fiber web are entangled to form a first surface layer, and at least a part of the fibers in the fiber web penetrates the base fabric. And forming a second surface layer on the surface opposite to the first surface layer of the base fabric,
Nonwoven sheet manufacturing method for cleaning. The fibrous web comprises irregular cross-section fibers and / or split fibers and polyolefin fibers;
The manufacturing method of the nonwoven fabric sheet for cleaning of Claim 5. The base fabric is a nonwoven fabric containing polyolefin fibers,
The manufacturing method of the nonwoven fabric sheet for cleaning of Claim 5 or 6.   The manufacturing method of the nonwoven fabric sheet for cleaning as described in any one of Claims 5-7 whose said base fabric is a spunlace nonwoven fabric, a spunbond nonwoven fabric, or a thermal bond nonwoven fabric.

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