JP2005185429A - Nonwoven fabric for cleaning - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide nonwoven fabric for cleaning capable of removing fur and black stains around water in a kitchen, or the like, and burnt stains stuck to a pot or a frying pan while hardly scratching a cleaning surface. <P>SOLUTION: This nonwoven fabric for cleaning is obtained by dispersing synthetic fibers (A) of fineness 20 to 100 dtex and synthetic fibers (B) of fineness 1 to 11 dtex in air and adhering the intersections of the deposited fibers. It is preferable that the adhesion is thermal adhesion by hot melting fibers or hot melting powder. It is further preferable that the synthetic fibers (B) are contained by 10 to 50 pts. wt. to 100 pts. wt. of the synthetic fibers (A). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaning nonwoven fabric, and more particularly to a cleaning nonwoven fabric suitably used for cleaning dirt around water such as around kitchens, bathrooms and washstands.

  Conventionally, sponges with abrasive particles and fibrous metal scrubbing have been known for cleaning sheets around water in kitchens, etc., to remove dirt and dark dirt. Although it has the ability to scrape off, the surface of stainless steel sinks and artificial marble is damaged, which is not desirable.

  On the other hand, Patent Document 1 discloses a cleaning sheet in which a cellulosic fiber is mixed in an airlaid nonwoven fabric having a large number (10 to 150 dtex) of short fibers (2 to 15 mm) on the surface layer, and a washing liquid is retained. Is described. Such a sheet is disclosed as a cleaning sheet that removes dirt without damaging the cleaning symmetry plane without using an abrasive by the interaction between the cleaning of the thick fiber tip and the cleaning liquid. However, although the cleaning surface was not damaged more than the sheet using the abrasive, the scorching dirt removal on the pan etc. was not satisfactory.

JP 2000-61885 A

  Therefore, the problem to be solved by the present invention is to provide a nonwoven fabric for cleaning that can remove stains that are hard to damage the cleaning surface due to dirt and dark stains around the water in kitchens, etc., and burnt stains on pans and pans. .

  The present invention relates to a nonwoven fabric for cleaning obtained by adhering intersections of fibers obtained by dispersing and depositing a thick synthetic fiber (A) having a fineness of 20 to 100 dtex and a thin synthetic fiber (B) having a fineness of 1 to 11 dtex in the air. By providing the above, the above-mentioned problems are solved.

  The present invention also provides a cleaning method in which water or an aqueous cleaning liquid is sprayed onto a cleaning surface and cleaning is performed using the above-described nonwoven fabric for cleaning.

  The non-woven fabric for cleaning of the present invention can remove dirt such as water stains and darkening around water, and scorched dirt attached to a pan or a frying pan, with less damage to the cleaning surface. Furthermore, the non-woven fabric for cleaning of the present invention has good liquid retention, so that the non-woven fabric can contain cleaning liquid or water, or the cleaning surface can be cleaned in a wet state to maintain a more clean-up action, and particularly stubborn scoring. It is possible to improve the cleaning performance by making dirt and the like difficult to damage the cleaning surface. In addition, a commercially available cleaning sheet containing abrasives will damage the bathtub and plastic products even after single use, and the gloss of the cleaning surface will be lost. Can be dropped.

  Hereinafter, the nonwoven fabric for cleaning of the present invention will be described based on its preferred embodiments. The nonwoven fabric for cleaning according to the embodiment of the present invention is formed by dispersing constituent fibers composed of the synthetic fibers (A) and the synthetic fibers (B) in the air and depositing them on the substrate to bond the intersections of the constituent fibers. Made of nonwoven fabric. When the constituent fibers are dispersed and deposited in the air, a nonwoven fabric in which the fibers are random, bulky and have many voids is obtained.

  The constituent fiber is composed of a synthetic fiber (A) having a fineness of 1 to 11 dtex and a synthetic fiber (B) having a fineness of 20 to 100 dtex.

  In the synthetic fiber (A), since the intersection of thick fibers is preferably bonded by heat, the surface and tip of the fiber strongly act on the surface to be cleaned, and the scraping performance against dirt existing on the cleaning surface can be obtained. . If it is less than 20 dtex, the scraping property of sticking dirt (modified oil, scorching, scale, etc.) is not good, and if it exceeds 100 dtex, the scraping performance is also reduced, and a uniform nonwoven fabric is obtained in terms of manufacturing. It becomes difficult to be. In particular, when the fineness of the synthetic fiber (A) is preferably 20 to 75 dtex, more preferably 20 to 50 dtex, the scraping performance of dirt stuck to a pan or the like is further improved. Specifically, the fiber length of the synthetic fiber (A) is preferably 1 to 10 mm. In particular, when a long fiber having a fiber length of 20 to 75 mm is used as a synthetic fiber (A) in a ratio of 9: 1 to 7: 3 by weight to a short fiber having a fiber length of 1 to 10 mm, the tip of a thick and short fiber, A thick and long fiber body is more preferable because of the combination of scraping and rubbing action against dirt on the cleaning surface, improving dirt removing performance. Furthermore, it is preferable to use a resin of R40 to R150 so that the Rockwell hardness of the synthetic fiber (A) is an optimum hardness that can be scraped without damaging the cleaning surface. As the resin having the hardness, polyethylene resin, polypropylene resin, polyester resin, acrylonitrile butadiene styrene (ABS) resin, 6 nylon resin, polycarbonate resin, polyvinyl chloride resin, 66 nylon resin, acrylic resin and the like can be used. A polyester resin is particularly preferable.

  The synthetic fiber (B) has a fineness of 1 to 11 dtex, and is preferably contained in an amount of 5 to 50 parts by weight with respect to the synthetic fiber (A). By containing the appropriate amount, when using it by spraying water or a cleaning liquid onto the cleaning surface to wipe off dirt or using it in a nonwoven fabric, the water or the cleaning liquid is well retained in the nonwoven fabric, and the synthetic fiber (A) It is considered that the scraping performance by the combination with the cleaning liquid holding performance by the synthetic fiber (B) can scrape stubborn dirt and the like so as not to damage the cleaning surface. In particular, the fineness of the synthetic fiber (B) is preferably 2 to 8 dtex. The fiber length is preferably 1 to 50 mm. When the fineness is less than 1 dtex, the scraping property of dirt is lowered, and when the fineness is more than 11 dtex, the liquid holding property and foaming property are lowered. Furthermore, a fiber having a fineness of 12 to 19 dtex can be mixed as the third constituent fiber.

  Synthetic fibers (A) and synthetic fibers (B) include, for example, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, acrylic resins such as polyacrylic acid and polymethacrylic acid, and vinyls such as polyvinyl chloride. Fibers made from polyamide resins such as nylon resins and nylon are used. Of the various raw materials, a composite fiber (core-sheath composite fiber or side-by-side composite fiber) made of a combination of two kinds of resins can be used. In particular, synthetic fibers (A) are acrylic fibers, polyester fibers, and vinyl chloride fibers from the standpoint that there is no damage to the surface to be cleaned (stainless steel, tiles, wrinkles, artificial marble, etc.) and excellent scraping properties. Polyamide fibers and polyolefin fibers are preferred. Furthermore, in terms of preventing the fibers from falling off, a heat-fusible composite fiber made of a low-melting resin and a high-melting resin having different melting points, and the low-melting resin forming at least a part of the fiber surface is used. Is preferred. The combination of low melting point resin / high melting point resin includes high density polyethylene / polypropylene, low density polyethylene / polypropylene, high density polyethylene / polyethylene terephthalate, nylon-6 / nylon-66, low melting point polyester / polyethylene terephthalate, polypropylene / polyethylene. Terephthalate is used.

  The form of the heat-fusible conjugate fiber is a parallel type, a sheath core type, an eccentric sheath core type, a multilayer type of three or more layers, a hollow parallel type, a middle sheath core type, a deformed sheath core type, a sea island type, etc. Any structure may be used as long as the melting point resin forms at least a part of the fiber surface. Preferred among the heat-fusible conjugate fibers are selected from high-density polyethylene, linear low-density polyethylene, ethylene-butylene-1 crystalline copolymer, copolymerized polyester of polyethylene terephthalate and polyethylene isophthalate, and low-melting polyester. This is a parallel type, sheath core type, or eccentric sheath core type composite fiber in which any one type of thermoplastic resin is a low melting point resin and polypropylene or polyethylene terephthalate is a high melting point resin. In particular, it is preferable to use a composite fiber of low-melting point polyester and polyethylene terephthalate from the viewpoint of good dirt scraping properties.

  A synthetic fiber (A) having crimpability can also be used. Thereby, the feeling of thickness of the cleaning sheet can be improved, and good wiping comfort can be obtained.

  The synthetic fiber (A) and the synthetic fiber (B) can each be used alone or in combination of two or more. Since the intersections of the fibers are bonded, it is preferable to use the same resin fibers as the synthetic fibers (A) for the synthetic fibers (B). Cellulosic fibers may be contained in addition to synthetic fibers.

  The nonwoven fabric for cleaning is a fiber web in which a synthetic fiber (A) and a synthetic fiber (B) are mixed, or a single web is dispersed in air and deposited on a substrate to form a web, and the constituent fibers in the formed web A non-woven fabric is formed by bonding the intersections of each other. As a means for bonding the constituent fibers, fusion bonding or adhesion using a binder is preferably used. As the binder, acrylic nitrile-butadiene rubber, styrene-butadiene rubber, polyvinyl acetate, polyethylene vinyl acetate, polyacrylate, or the like is used. Preferably, the web is formed by the air lay method, and the fiber intersections are bonded and manufactured. In the nonwoven fabric for cleaning obtained in the present invention, the constituent fibers are randomly three-dimensionally oriented, and the gaps between the fibers are relatively large and bulky.

  From the viewpoint of operability, the nonwoven fabric for cleaning of the present invention preferably has an uneven structure formed by embossing. Furthermore, when heat-fusible fibers are used as the constituent fibers of the nonwoven fabric for cleaning, the uneven structure is formed by heat embossing or ultrasonic embossing, including the point of improving the strength of the nonwoven fabric. It is preferable. Further, a sponge, another nonwoven fabric or a film may be laminated on one side of the cleaning nonwoven fabric of the present invention to form a multilayer structure. In this case, what is necessary is just to form the nonwoven fabric of this invention in a surface layer so that a cleaning surface may be contact | connected directly.

  The non-woven fabric for cleaning of this embodiment is a modified oil stuck to kitchens, pans and frying pans, removes dirt such as scorching and scales, and sebum, scales, dust and soap dusts stuck around the bathroom, toilet and bathroom. It can be used for removal of water. In particular, it is most suitable for removing stubborn dirt in pots, pans, and microwave ovens.

  The nonwoven fabric for cleaning of the present invention is preferably used by spraying water or a cleaning liquid on the surface to be cleaned or the nonwoven fabric (referred to as “cleaning surface”) at the time of use. And since the nonwoven fabric for cleaning contains the synthetic fiber (B) with a thin diameter, the retention of the cleaning liquid is good, and in addition to mechanically polishing or scraping off the dirt on the surface to be cleaned, Since the dirt swells or partially dissolves by the cleaning agent, in combination with the action of mechanical polishing or scraping, the removal of the dark dirt, etc., is further improved and the cleaning surface is hardly damaged.

  The removal mechanism of the dirt in the nonwoven fabric for cleaning according to this embodiment will be described by taking as an example the case of cleaning the nonwoven fabric for cleaning by wiping the cleaning liquid or spraying the cleaning liquid on the cleaning surface. Press the surface against the surface to be cleaned and rub it. When the cleaning liquid is held in the fine synthetic fiber contained in the nonwoven fabric for cleaning and rubbed, the cleaning liquid oozes out to the surface, and the cleaning surface is constantly filled with the cleaning liquid. The cleaning liquid swells, dissolves or floats up dirt on the surface to be cleaned. At the same time, the synthetic fiber (A) having a large diameter of the nonwoven fabric for cleaning is bonded at its intersection, so that the scraping performance of the synthetic fiber (A) with respect to dirt on the body and tip is further improved. Scrape off the dirt that exists in the well. By these mechanical and chemical interactions, dirt is effectively removed from the surface to be cleaned. Especially for scumming stains, the polishing action by the large-diameter synthetic fiber (A) to which the intersection points are bonded, and the cleaning liquid retained on the small-diameter synthetic fiber (B) repeatedly rubs the scooted surface, and the cleaning action. In combination, it can be effectively removed, and the body and tip of the synthetic fiber having a large diameter can be effectively peeled off by rubbing or scraping against the stained dirt. Like a conventional cleaning sheet made of metal fibers or the like, it is not scraped off by a sharp and hard tip, and the scoring is not lost and the cleaning surface is not damaged. In addition, the nonwoven fabric formed only by thick synthetic fibers by air-laying method has many thick fiber tip parts on the surface and has the ability to scrape dirt. Therefore, the surface to be cleaned is damaged, and it is easy to damage particularly soft materials such as aluminum and plastic. Furthermore, when a non-woven fabric formed only of thick fibers is held by hand, there is a tingling discomfort. The product of the present invention achieves both scratching ability and dirt removal performance without having a large number of fiber tips on the surface. There is not much tingling sensation when held by hand.

  The cleaning liquid sprayed on the cleaning side of the cleaning nonwoven fabric of the present invention or the surface to be cleaned (cleaning surface) or impregnated into the nonwoven fabric in advance is preferably an aqueous cleaning liquid, using water as a medium, a surfactant, an alkaline agent, an electrolyte, and a water-soluble liquid. It is preferable to contain a reactive solvent. Furthermore, it is preferable to contain a disinfectant. The non-volatile residual component contained in the aqueous cleaning agent is preferably 10% by weight or less from the viewpoint of finish after cleaning, and particularly preferably 5% by weight or less. As a surfactant, an alkali agent, an electrolyte, a water-soluble solvent, and other components to be contained in the aqueous detergent, it can be used as described in JP-A-2003-61835 [0034] to [0039]. Water, which is a medium for the aqueous cleaning agent, is preferably contained in the aqueous cleaning agent in an amount of 50 to 99.9% by weight, particularly 80 to 99% by weight, from the viewpoint of the cleanability and finish of the surface to be cleaned.

  When used by spraying the cleaning liquid, it is preferable that the cleaning liquid is used by spraying on the cleaning surface or the nonwoven fabric for cleaning with respect to the weight of the nonwoven fabric for cleaning.

  You may laminate | stack the liquid holding sheet | seat containing a cellulosic fiber on the single side | surface of the nonwoven fabric for cleaning of this invention. The liquid holding sheet acts as a holding carrier for the aqueous cleaning liquid. In this case, the cleaning liquid or the cleaning nonwoven fabric can be used without spraying the cleaning liquid.

  Furthermore, the cleaning nonwoven fabric of the present invention can be easily cleaned by using wet water when cleaning around the water in the kitchen without spraying or pre-impregnating the cleaning liquid. .

  Next, an example of the manufacturing method of the nonwoven fabric for cleaning of this embodiment is demonstrated.

  The fiber web made by blending the heat-fusible synthetic fiber (A) and synthetic fiber (B) is disentangled, the loosened fibers are vibrated, and the fibers are piled down while being dispersed and dropped from the sieve mesh. A fiber web is obtained by collecting on a web collection device such as a conveyor. Furthermore, the target nonwoven fabric is obtained by heat-treating at a temperature equal to or higher than the heat-fusion temperature with a heat treatment machine and fusing the intersections of the fibers. As the heat treatment machine for the web, an air-through heat treatment machine can be used. When heat-sealable fibers are not used, the target nonwoven fabric is obtained by laminating the fibers and then heat-treating the fiber web obtained by spraying heat-sealable powder or adhesive to bond the intersections. It is done. Further, by appropriately controlling the manufacturing conditions in the above process, the abundance of the synthetic fiber (A) in the nonwoven fabric thickness direction can be given a gradient. For example, by passing the synthetic fiber (A) dispersion and dropping process next to the synthetic fiber (B) dispersion and dropping process, a large amount of the synthetic fiber (A) can be present on the surface layer of the nonwoven fabric. Performance can be improved. Furthermore, when the synthetic fiber (A) is dispersed and dropped, by varying the suction from below, the synthetic fiber (A) can be tilted differently and can stand upright or be laid down. In the nonwoven fabric for cleaning of the present invention, since both the trunk and the tip of the synthetic fiber (A) having a large diameter act on dirt, it is preferable that the large-diameter fiber is extremely raised or not extremely laid down. Further, the synthetic fiber (B) having a small diameter is preferably not uniform with respect to the synthetic fiber (A) having a large diameter, but is uniform on the cleaning surface in the thickness direction. On the other hand, when using a far lower layer or double-sided cleaning, it is preferably present in the middle layer. In the production method of the present invention, it is preferable to use the air array method, but any other method can be used as long as it is a fiber web in which fibers are dispersed and deposited in air. The fiber bonding method may be a thermal bond method or a chemical bond method, but is not limited to the above method as long as the fiber intersection is strong.

  The non-woven fabric for cleaning of the present invention can improve operability when it is rubbed by hand and cleaned by embossing it. When heat-fusible fiber is used, it can be formed by heat embossing or ultrasonic embossing. Furthermore, a plurality of cleaning nonwoven fabrics according to the present invention are stacked and heat-treated to form a block-shaped cleaning nonwoven fabric. By peeling off several original thin nonwoven fabrics from the block, it can be used with appropriate thickness.

  Next, the present invention will be specifically described based on the following examples.

[Example 1]
A fiber web in which a polyethylene terephthalate heat-fusible fiber having a fineness of 56 dtex and a fiber length of 5 mm and a polyethylene terephthalate heat-fusible fiber having a fineness of 2.2 dtex and a fiber length of 5 mm are mixed in a weight ratio of 75:25 (large diameter: small diameter). The fiber was defibrated and dispersed, and the fiber was deposited on the substrate to obtain a fiber web. The obtained fiber web was heat-treated at 140 ° C. to fuse the intersections of the fibers to obtain a cleaning nonwoven fabric having a thickness of 1.5 mm and a basis weight of 80 g / m ² .

[Example 2]
A fiber web in which a polyethylene terephthalate heat-fusible fiber having a fineness of 22 dtex and a fiber length of 5 mm and a polyethylene terephthalate heat-fusible fiber having a fineness of 2.2 dtex and a fiber length of 5 mm are mixed in a weight ratio of 90:10 (large diameter: small diameter). Was defibrated and dispersed, and the fiber was deposited on a substrate to obtain a fiber web. The obtained fiber web was heat-treated at 140 ° C. to fuse the intersections of the fibers to obtain a cleaning nonwoven fabric having a thickness of 1.8 mm and a basis weight of 80 g / m ² .

Example 3
Weight of heat-sealable fiber of polypropylene (core) / polyethylene (sheath) structure with a fineness of 35 dtex and fiber length of 5 mm and heat-sealable fiber of polypropylene (core) / polyethylene (sheath) structure with a fineness of 11 dtex and fiber length of 5 mm A fiber web blended in a ratio of 50:50 (thick diameter: thin diameter) was defibrated and dispersed, and the fiber was lowered onto the substrate to obtain a fiber web. The obtained fiber web was heat-treated at 145 ° C. to fuse the intersections of the fibers to obtain a cleaning nonwoven fabric having a thickness of 2.3 mm and a basis weight of 80 g / m ² .

[Comparative Example 1]
A fiber web made of heat-fusible fibers with a polypropylene (core) / polyethylene (sheath) structure with a fineness of 3.3 dtex and a fiber length of 5 mm is disentangled and dispersed, and the fibers are lowered onto the substrate to form the fiber web. Obtained. The obtained fiber web was heat-treated at 145 ° C. to fuse the intersections of the fibers to obtain a cleaning nonwoven fabric having a thickness of 1.8 mm and a basis weight of 80 g / m ² .

[Comparative Example 2]
Weight ratio of heat-fusible fiber of polyethylene terephthalate having a fineness of 2.2 dtex and fiber length of 5 mm to heat-fusible fiber having a fineness of 1.7 dtex and fiber length of 5 mm of polypropylene (core) / polyethylene (sheath) structure The fiber web blended with the fiber was defibrated, dispersed, and deposited on the substrate to obtain a fiber web. The obtained fiber web was heat-treated at 145 ° C. to fuse the intersections of the fibers to obtain a cleaning nonwoven fabric having a thickness of 1.7 mm and a basis weight of 80 g / m ² .

[Comparative Example 3]
Polyethylene terephthalate heat-bonded fibers having a fineness of 22 dtex and a fiber length of 5 mm were disentangled, dispersed and loaded onto the substrate to obtain a fiber web. The obtained fiber web was heat-treated at 145 ° C. to fuse the intersections of the fibers to obtain a cleaning nonwoven fabric having a thickness of 1.9 mm and a basis weight of 80 g / m ² .

[Performance evaluation]
About the nonwoven fabric for cleaning obtained by the Example and the comparative example, the cleaning | polishing amount of washing | cleaning liquid used as the standard of dirt scraping performance, damage prevention performance, and washing | cleaning liquid holding | maintenance was evaluated with the following method. The results are shown in Table 1.

[How to make weakly denatured dirt]
0.06g of oil (trade name rapeseed oil, manufactured by Hayashi City Next Shoten Co., Ltd.) is uniformly applied to an iron test piece (30mm x 80mm) whose surface is rubbed with sandpaper, and baked at 160 ° C for 30 minutes to weakly denature oil stains made. The pencil hardness of this weakly modified oil stain was 5B or less.

[How to make moderately modified oil stains]
0.06 g of oil (trade name: rapeseed oil, manufactured by Hayashi City Next Shoten Co., Ltd.) is uniformly applied to an iron test piece (30 mm × 80 mm) whose surface is rubbed with sandpaper, and baked at 150 ° C. for 130 minutes to moderately denatured oil stains made. The pencil hardness of this medium-modified oil stain was 3B.

[How to create stubborn dirt]
Apply 0.06g of a mixture of sugar: soy sauce: mirin = 40:44:16 (weight ratio) uniformly to a test piece (30mm x 80mm) made of SUS304, and bake it at 180 ° C for 120 minutes to make a burnt stain. It was. The pencil hardness of this burnt stain was 9H.

[Scraping performance evaluation method]
Wet the cleaning nonwoven with light water and spray 2ml of detergent (or Kao Family Compact) with 41% of surfactant in water. After gently squeezing, hand the model-stained test piece with a load of about 5000g. The number of times the model dirt was removed by rubbing and visual observation was defined as the number of times of wiping.

[Injury prevention]
Under the load of 400 g / cm ² on the test piece (30 mm x 80 mm) processed with stainless steel (SUS304), artificial marble (acrylic), aluminum, polycarbonate, fluororesin with the cleaning sheet sprayed with the cleaning liquid And rubbed 20 times each. Thereafter, scratch resistance was evaluated according to the following criteria.
○: No scratches are visually observed Δ: Scratches are visible when held over light visually X: Many scratches are visible (not held over light)

[Measurement method of the amount of washing liquid retained]
The obtained non-woven fabric for cleaning is placed on the opening of a 300 cc beaker, and 2 ml of a cleaning liquid (or Kao Family Compact) in which the surfactant is adjusted to 41% with water is dropped with a glass pipette on the center of the non-woven fabric. After standing for 1 minute, the weight (g) of the cleaning liquid that passed through the nonwoven fabric and dropped into the beaker was measured.

  As is clear from the results shown in Table 1, it can be seen that the nonwoven fabric for cleaning (product of the present invention) of each Example is excellent in cleaning performance against dirt.

Claims (8)

  A nonwoven fabric for cleaning obtained by dispersing a synthetic fiber (A) having a fineness of 20 to 100 dtex and a synthetic fiber (B) having a fineness of 1 to 11 dtex in the air and bonding the intersections of the deposited fibers.   The nonwoven fabric according to claim 1, wherein the bonding is heat bonding using heat-fusible fibers or heat-fusible powder.   The said synthetic fiber (B) contained 10-50 weight part with respect to 100 weight part of synthetic fibers (A), The nonwoven fabric for cleaning of Claim 1 or 2 characterized by the above-mentioned.   The nonwoven fabric for cleaning according to any one of claims 1 to 3, wherein the synthetic fiber (A) uses a resin having a Rockwell hardness of R40 to R150.   The synthetic fiber (A) contains a short fiber having a fiber length of 1 to 10 mm and a long fiber having a fiber length of 20 to 75 mm in a weight ratio of 9: 1 to 7: 3. The nonwoven fabric for cleaning according to any one of 3.   The said synthetic fiber (A) consists of a polyethylene terephthalate, The nonwoven fabric for cleaning of Claim 3 characterized by the above-mentioned.   The cleaning nonwoven fabric according to any one of claims 1 to 4, wherein a cleaning liquid dropping amount of the cleaning nonwoven fabric is 1.5 g / 1 min or less. A cleaning method in which water or an aqueous cleaning liquid is sprayed on a cleaning surface, and cleaning is performed using the cleaning nonwoven fabric according to any one of claims 1 to 7.