JP2019063221A - Nonwoven fabric duster and manufacturing method of the same - Google Patents

Abstract

To provide a nonwoven fabric duster easy to selectively use in the front and rear, and hardly causing color fading.SOLUTION: A nonwoven fabric duster as a pulp-mixed spunlace nonwoven fabric in which a spunbonded nonwoven fabric comprising synthetic resin fiber and pulp fiber are entangled is configured such that: a basis weight is 40-70 g/m; a basis weight of the spunbonded nonwoven fabric is 10-25 g/m; a ratio of the pulp fiber is 60-80 mass%; a ratio of the spunbonded nonwoven fabric is 20-40 mass%; the synthetic resin fiber comprising the spunbonded nonwoven fabric is a coloring fiber colored by mixing a coloring agent; and colors of the coloring fibers comprising the pulp fiber and the spunbonded nonwoven fabric are different.SELECTED DRAWING: None

Description

  The present invention relates to a non-woven duster and a method of manufacturing the non-woven duster.

  Non-woven dusters are often used in sugar beet and lunch box manufacturing plants and in the backyards of supermarkets. As the non-woven fabric used for this kind of non-woven duster, a spun-lace rayon non-woven fabric in which rayon fibers or rayon fibers and synthetic resin fibers are entangled by water flow is mainly used, but pulp fibers and non-woven fabric made of synthetic resin Pulp mixed non-woven fabrics which are entangled by water flow are also used.

  On the other hand, the non-woven duster is provided with a color pattern that is easily visible on the front and back so that it is easy to use different dusters depending on the place of use and the object to be wiped off. This color pattern is generally formed by printing from one side. Since the duster has a low density, even if printing is performed from one side, the ink can penetrate from the back side to the back side to easily form a color pattern on the front and back.

  However, the conventional duster with a color pattern has a problem that it may be discolored by chemicals such as alcohol and hypochlorous acid used for disinfection and the like.

  Also, if you do not want to use the same part but not enough to use different dusters, you may want to use properly on the front and back of the duster, but the conventional colored dusters have the same color pattern on the front and back Because of that, there was a problem that it was difficult to use properly on the front and back. In particular, since dusters are often used in two-fold and four-fold, conventional dusters having the same color pattern on the front and back are difficult to use properly. It is also conceivable to provide different color patterns on the front and back, but as mentioned above, the non-woven fabric used for dusters has a low density, so the ink easily penetrates the back, making it difficult to print separately. The cost of printing is also high.

  On the other hand, in particular the duster of the pulp-blended nonwoven fabric, the binder odor may be felt as an offensive odor from the nonwoven fabric of synthetic resin fibers.

JP-A-9-266873

  Therefore, the main object of the present invention is to provide a non-woven duster and a non-woven duster as a pulp-blended non-woven fabric which is excellent in liquid absorption and abrasion resistance, easy to use properly on the front and back, and difficult to discolor. It is in.

  The means for solving the problems of the present invention are as follows.

The first means is
A pulp-blended non-woven fabric in which pulp fibers are hydroentangled from one side with respect to a spunbond non-woven fabric made of synthetic resin fibers,
Its basis weight is 40 to 70 g / m ² ,
The basis weight of the spunbonded nonwoven fabric is 10 to 25 g / m ² ,
The proportion of pulp fiber is 60 to 80% by mass, and the proportion of spunbonded nonwoven fabric is 20 to 40% by mass,
The synthetic resin fiber constituting the spunbonded nonwoven fabric is a colored fiber to which a coloring agent is kneaded and colored.
And the color of the colored fiber which comprises the said pulp fiber and a spun bond nonwoven fabric differs, It is a nonwoven fabric characterized by the above-mentioned.

The second means is
The pulp fiber is a non-colored bleached pulp and contains 95% by mass or more of NBKP, and the synthetic resin fiber is colored to a color other than white, and the thickness is 18 to 22 μm. Means of non-woven duster.

The third means is
Laminating a dry pulp sheet on a spunbond non-woven fabric having a basis weight of 10 to 25 g / m ² of synthetic resin fibers into which a coloring agent is kneaded and colored;
A hydroentanglement step of jetting a water flow from the nozzle having a nozzle diameter of 0.5 to 1.5 mmφ onto the dry pulp sheet surface;
It is a manufacturing method of the nonwoven fabric duster characterized by having.

The fourth means is
The pulp fiber is a non-colored bleached pulp and contains 95% by mass or more of NBKP, and the synthetic resin fiber is colored to a color other than white, and the thickness is 18 to 22 μm. A method of producing a non-woven duster according to

  According to the present invention, a method for producing a non-woven duster and a non-woven duster as a pulp-blended non-woven fabric excellent in liquid absorption and abrasion resistance, easily used on front and back, and difficult to lose color is provided.

  The nonwoven fabric duster of this embodiment and its manufacturing method are explained.

  The non-woven duster of this embodiment is a pulp-blended non-woven fabric in which pulp fibers are hydroentangled from one side with respect to a spunbond non-woven fabric of synthetic resin fibers. The pulp-blended non-woven fabric according to the present invention has a good intertwining of fibers due to entanglement between the synthetic resin fibers constituting the spun-bonded non-woven fabric and the pulp fibers and constitutes an integrated non-woven sheet. It has a surface and a pulp fiber surface. The spunbond nonwoven fabric is a nonwoven fabric obtained by a spunbond method in which a pellet raw material is directly spun to produce a nonwoven fabric, which is a long fiber and is excellent in dimensional stability. Moreover, as a binderless nonwoven fabric, it can form without using a binder.

  The pulp fibers in the non-woven duster of the present embodiment can be selected from pulp fibers derived from hardwoods, pulp fibers derived from softwoods, and pulp fibers derived from waste paper. In particular, it is desirable that the pulp fibers be non-colored bleached pulp. In the case of bleached pulp, the pulp fiber surface has high whiteness derived from bleached pulp and becomes white. Here, the average fiber length of the pulp fibers (hereinafter also referred to as the fiber length) is preferably 3.0 to 5.0 mm. Entanglement with synthetic resin fibers is likely to be suitable. Among the pulp fibers, particularly preferred are softwood-derived pulp fibers. Pulp fibers derived from softwood have an average fiber length of 3.5 to 4.0 mm, are effectively intertwined with synthetic resin fibers, are less likely to lose fibers, and are less likely to generate paper powder. In the present embodiment, in particular, the pulp fiber preferably contains at least 95 mass% of NBKP (softwood kraft pulp) because fiber length and bleached pulp are desirable. However, hardwood unbleached pulp (LUKP) and softwood unbleached pulp (NUKP) can also be used.

  The synthetic resin fiber which comprises a spun bond non-woven fabric is a thing which can carry out water entanglement with a pulp fiber, and if there is no problem in duster use, it will not be limited in particular. For example, polyethylene fibers, polypropylene fibers, polyethylene terephthalate fibers and the like can be mentioned. It may be a fiber made of a plurality of resins, for example, a synthetic resin fiber having a core-sheath structure. Preferably, they are polyethylene fibers or polypropylene fibers which are inexpensive, light in weight, can develop sufficient strength, and are easily entangled by water flow. The thickness of the synthetic resin fiber is preferably 18 to 22 μm. The entanglement with pulp fibers, in particular pulp derived from softwood, is strong and pulp fibers are less likely to fall off. The fiber length is measured by Kayani / Fiber Lab, and the fiber thickness is measured by observation with an electron microscope.

The basis weight of the non-woven duster according to the present embodiment is 40 to 70 g / m ² . More preferably, it is 48-58 g / m < ² >. It has the strength necessary for wiping and sufficient liquid absorbability. Basis weight of the synthetic resin fibers in the further spunbonded nonwoven fabric is 10 to 25 g / m ^2, preferably 12~16g / m ^2. Moreover, the ratio of a pulp fiber is 60-80 mass%, and the ratio of a spun bond nonwoven fabric is 30-40 mass%. The pulp blending ratio is a high numerical value and is superior in liquid absorption. That is, when the blending ratio of the pulp is 60 to 70% by mass of the whole non-woven fabric in the range of the weight per unit area of the synthetic resin fiber, it becomes soft while having sufficient strength and particularly excellent in liquid absorbability. Moreover, since the fabric weight of the synthetic resin fiber in a spun bond nonwoven fabric is as low as 10-25 g / m < ² > and the ratio of a spun bond nonwoven fabric is 30-40 mass%, the water absorbency of a pulp fiber can fully be exhibited. Furthermore, by this weight per unit area, the integrity of the pulp fiber layer and the spunbond nonwoven layer is high, the abrasion resistance is high, and in particular, it is difficult to generate lup fiber loss when using the pulp fiber surface. Furthermore, since it is a spunbonded nonwoven fabric, no binder component is required, so that no offensive odor caused by the binder is generated. In addition, even if a binder is used, the amount of binder used can be reduced because the weight per unit area is low, and it is also difficult to generate an offensive odor due to the binder.

  Here, in the non-woven duster of the present embodiment, the synthetic resin fibers constituting the spun-bonded non-woven fabric are colored fibers in which a coloring agent is kneaded and colored. In particular, by setting the above-mentioned coating weight, it becomes possible to visually recognize the colored synthetic resin fiber as a sufficient color depth. The colored fiber may be produced by spinning a colored pellet raw material into which the coloring agent is kneaded to produce a spunbond nonwoven, or by mixing a colorant with the pellet raw material to produce a spunbonded nonwoven. A coloring agent can be suitably selected from what is used as a coloring agent of a synthetic resin material. However, regardless of discoloration due to friction, heptane must be 150 μg / ml or less, 20% ethanol, 4% acetic acid, 30 μg / ml or less in elution test for heptane, 20% ethanol, 4% acetic acid and water is there.

  In the non-woven duster of this embodiment, in particular, the colors of the pulp fibers and the colored fibers constituting the spunbonded non-woven fabric are different. As described above, when the color of the pulp fiber and the fiber of the spunbonded nonwoven fabric is different, in the nonwoven fabric duster of the present embodiment, the front and back become visible as different colors. The pulp fibers are preferably bleached pulps as described above, particularly bleached pulps having an ISO whiteness of 85% or more, and in particular non-colored pulp fibers. In this case, since the surface of the pulp fiber is white, the synthetic resin fiber may be colored other than white.

  In the nonwoven fabric duster of the present embodiment, the integrity due to the entanglement between the pulp fiber and the spunbond nonwoven fabric is high, and the synthetic resin fiber and pulp fiber constituting the spunbond nonwoven fabric are not externally colored by the ink or the like. Since the synthetic resin fiber is a colored fiber in which a coloring agent is kneaded and colored, it is very difficult to cause color loss during friction. And, in particular, the difference in color between the pulp fiber surface and the spunbond nonwoven surface is clearly visible. Furthermore, since there is a clear difference in texture between the spunbond nonwoven fabric surface and the pulp fiber surface, it is easy to recognize the front and back even when folded in two or four. Further, in the non-woven duster according to the embodiment, the spunbonded non-woven fabric surface is excellent in abrasion resistance and is easy to conform to oil, and the pulp fiber surface is soft and easy to be compatible with water.

  Here, as for the nonwoven fabric duster of this embodiment, it is desirable for the aspect ratio of dry tensile strength to be 3.0 or less, preferably 2.5 or less. The specific dry tensile strength in the longitudinal and transverse directions is not necessarily limited, but it is desirable that it is 2,000 to 3,400 cN / 25 mm in the longitudinal direction and 700 to 1,600 cN / 25 mm in the transverse direction. Within this range, the strength is sufficient for wiping. In addition, the measuring method of dry tensile strength is implemented by the method according to JISP8113 (1998). As a measuring apparatus, Minebea Co., Ltd. "Universal tensile compression tester TG-200N" is mentioned. The above aspect ratio of the nonwoven fabric duster of the present embodiment as a hydroentangled pulp-blended nonwoven fabric is a very small value. That is, after mixing paper made of paper such as crepe paper on non-woven fabric of synthetic resin fiber, the pulp-blended non-woven fabric of water flow entanglement is sprayed with liquid from the paper lamination surface to laminate pulp fiber and non-woven fabric. It is common to confound. The difference in the dry tensile strength in the longitudinal direction and the transverse direction of the synthetic resin fiber non-woven fabric is small, so the aspect ratio of the pulp-blended non-woven fabric is influenced by the aspect ratio of the paper derived from the manufacturing method of papermaking. In the non-woven duster of the present embodiment, it is desirable that the non-woven duster be characterized as being free from the influence of the paper-derived aspect ratio and the like. In addition, the manufacturing method example of the said pulp mixing nonwoven fabric is mentioned later.

On the other hand, in the nonwoven fabric duster according to the present embodiment, the measured value in the Martindale method defined in JIS L 1096 E method (2010) is 100 or more on the spunbond nonwoven surface and 15 or more on the pulp fiber surface. Is desirable. In addition, in this test method, it can be said that the product does not lose color if there is no color transfer on the standard friction cloth after 20 times. The Martindale method is a test for abrasion resistance, and polyurethane foam (apparent density 0.03 g / cm ³ , thickness about 3 mm) is attached to the back of the test piece to the sample holder of the abrasion tester, and it is pre-woven felt (Material: hair, unit weight: 750 g / m ² , thickness: 3 mm) Standard friction cloth (material: length / hair, width / hair, fineness: length / R63 tex / 2, width / R74 tex / 2 Weight: 215 g / m ² ), put on a mounted friction table and rub in multiple directions, measure the number of times up to the end point, and measure the number of times fuzz was visually confirmed. The average of four times is calculated, and this is taken as a measured value. In addition, the measured value in this embodiment is shown per unit. A specific example of the wear tester is the Grotz-Beckert Martindale wear tester. For the measurement, the material to which the friction is applied is a standard friction cloth, the load is 9 Kpa, the wet condition, and the movement is a resurge. WET conditions wet the entire test specimen (38 mmφ) with 300 μl water.

  The non-woven duster as the pulp-blended non-woven fabric according to the present embodiment has a high blend ratio of pulp fibers and is excellent in liquid absorption, and further, there is little separation of pulp fibers on the front and back, and entanglement of synthetic resin fibers and pulp fibers is possible. It is good.

  In addition, in the nonwoven fabric duster which concerns on this embodiment, it is desirable not to apply | coat the binder component which is easy to reduce liquid absorbency. In addition, it is desirable that external coloring such as printing with ink is not performed.

Then, the manufacturing method of the nonwoven fabric duster which concerns on this embodiment is demonstrated. The non-woven duster according to the present embodiment is dried by forming a sheet of dissolved pulp on a spun bond non-woven fabric having a basis weight of 10 to 25 g / m ² of synthetic resin fibers in which a coloring agent is kneaded and colored and dried. It has the process of laminating a pulp sheet. The above spunbond non-woven fabric is manufactured by spinning a colored pellet raw material into which a coloring agent is kneaded to produce a non-woven cloth by a spunbond method, or mixing a coloring agent into the pellet raw material to spin to produce a non-woven fabric by a spunbond method Just do it. At this time, it is preferable to use a binderless nonwoven fabric without using a binder. The fiber type, fiber length, and fiber thickness of the synthetic resin fibers constituting the spunbond nonwoven fabric and the pulp fibers constituting the dissolving pulp are as described in the nonwoven fabric duster of the present embodiment.

  It is preferable to use a dried pulp sheet in which dissolved pulp is sheeted, and a pulp dissolving liquid in which pulp fibers are dispersed and suspended in water is discharged onto a conveying plane and compressed and dried by a heating drum to form a sheet. . The drying temperature is 85 to 115 ° C, preferably 90 to 110 ° C. In addition, a suitable auxiliary agent can be added in the range which does not prevent the effect of this invention in a pulp melt solution. The dried pulp sheet has a small fiber orientation and a very small difference in aspect ratio of dry tensile strength. Further, the basis weight (weight) of the dried pulp sheet is appropriately adjusted so that the fiber blending ratio of the pulp becomes 60 to 70 mass% in the pulp mixed nonwoven fabric in consideration of the yield at the time of water flow entangling and the like.

Then, according to spunlace technology also referred to as water jet technology, water needle technology, etc., water is sprayed and hit on the dried pulp sheet surface of the laminated sheet in which the spunbond nonwoven fabric and the dried pulp sheet are laminated, and dried pulp The process of breaking the bonds of the pulp fibers in the sheet and hydroentangling the synthetic resin fibers of the spunbonded nonwoven fabric and the pulp fibers of the dried pulp sheet is performed. Here, in the manufacturing method of the nonwoven fabric duster as a pulp mixing nonwoven fabric of this embodiment, it is considered as a nozzle of 0.5-1.5 mm diameter nozzle diameter of a nozzle which especially jets a stream of water. More preferably, it is 0.75 to 1.25 mmφ. The water pressure is not necessarily limited, but preferably about 100 to 110 bar. This is a value higher than the general pressure (80 to 90 bar). The appropriate adjustment is performed according to the type of synthetic resin fiber and the like. The nozzle diameter is smaller than the conventional method for producing a pulp-blended nonwoven fabric. In the present embodiment, synthetic resin fibers and pulp are produced by jetting a water stream from a small diameter nozzle and striking against a dry pulp sheet with little fiber orientation laminated on a spunbond nonwoven fabric having a basis weight of 10 to 25 g / m ^2. The entanglement with the fibers becomes good, and in particular, the penetration of the pulp fibers to the surface side of the spunbond nonwoven fabric becomes good, and the pulp fibers on the pulp fiber surface become difficult to separate. In particular, when the preferred synthetic resin fiber construction and pulp fiber construction are adopted, the movement of the fibers due to the water flow is good, and the duster according to the present embodiment can be manufactured effectively. That is, it is desirable that a dry pulp sheet contains NBKP 95 mass% or more, and the thickness of the synthetic resin fiber which comprises a spun bond nonwoven fabric is 18-22 micrometers.

  Thus, the laminated sheet that has been subjected to the water flow entanglement is appropriately made into a pulp-blended nonwoven fabric through a drying process, and then cut into a nonwoven fabric duster. The drying step and the cutting step can be performed by known techniques.

  Subsequently, tests were conducted on the non-woven duster (Examples 1 and 2) according to the present embodiment and the conventional non-woven wipes (Comparative Examples 1 to 8). Comparative Example 1 is a conventional pulp-blended non-woven fabric, and Comparative Examples 2 to 8 are non-woven dusters of spun lace non-woven fabric according to the conventional example. The results of the test are shown in the following Table 1 together with physical property values and measured values according to Examples and Comparative Examples. The tests conducted are as follows.

[Dry tensile strength]
It measured according to the tension test of JISP 8113 (1998). The test piece used what was cut | judged about width 25 mm (+/- 0.5 mm) * length 150 mm about the length * width direction. As a tester, a load cell tensile tester TG-200N manufactured by Minebea Co., Ltd. was used. The gripping distance was set to 100 mm. The measurement was performed according to a procedure in which both ends of the test piece were clamped to a clamp of a testing machine, a tensile load was applied to the paper piece in the vertical direction, and an indicated value (digital value) when the paper broke. The tensile speed was 100 mm / min. Five sets of samples were prepared in each of the longitudinal direction and the lateral direction, each was measured five times, and the average of the measured values was taken as the dry tensile strength in each direction. (The adjustment of the sample is JIS P 8111 (1998)) The aspect ratio is calculated from the measured value.

[Abrasion resistance test]
It measured by the Martindale method prescribed | regulated to JIS L 1096 E method (2010). About Example 1, Example 2, and Comparative Example 1, it carried out about a spun bond nonwoven fabric side and a pulp fiber side, and carried out only one side about comparative example 2-comparative example 9 which does not have a difference in fiber composition on front and back. As a wear tester, a Grotz-Beckert Martindale tester was used. The material to which the friction was applied was a standard friction cloth, the load was 9 Kpa, the WET condition (the test piece of 38 mmφ was entirely moistened with 300 μL of water), and the movement was performed as a resurge. WET conditions are by blowing the sample surface with a mist.

  The color change due to friction was judged in the same procedure as described above based on whether color transfer could be visually confirmed on the standard friction cloth when friction was applied 20 times.

[Water absorption amount]
The measurement of the amount of water absorption was performed as follows (1)-(5).
(1) The mass of the test piece is measured by an electronic balance (A & D HR300 etc.).
(2) Water at 25 ° C. is placed in a tray (for example, inner size: 215 mm × 160 mm) larger than the test piece so as to have a depth of about 20 mm.
(3) The test piece is spread on a rigid flat net (for example, 120 mm × 120 mm, 15 mm mesh) of a size equal to or larger than the test piece, dropped into a tray containing the water, and brought into contact with the water surface Soak the test specimen as you do.
(4) When water is sufficiently infiltrated to the surface of the test piece, raise the flat screen directly above the water surface, pick the corner of the test piece with tweezers, and stand still for 30 seconds.
(5) the mass of water absorption test specimens after 30 seconds was measured by an electronic balance, to calculate the water absorption amount per 1 m ² by the following equation.
Water absorption amount (g / m ² ) = ((mass of test piece measured by (4) above)-(mass of test piece measured by (1) above) × 100 (note: converted to m ² ) Because, 100 times)

Oil absorption amount
The measurement of oil absorption amount was as follows (1) to (5).
(1) The mass of the test piece is measured by an electronic balance (A & D HR300 etc.).
(2) A salad oil (Nisshin salad oil: manufactured by Nisshin Oillio Group, Inc.) at 25 ° C. is placed in a tray (for example, inner size: 215 mm × 160 mm) larger than the test piece so as to have a depth of about 20 mm.
(3) The test piece is spread on a rigid flat net (for example, 120 mm × 120 mm, 30 mm mesh) having a size equal to or larger than the test piece, and dropped into a tray containing the salad oil. Lubricate the specimen to make contact.
(4) When the salad oil is fully soaked to the surface of the test piece, raise the flat net to just above the oil surface and stand still for 30 seconds as it is, then hold the corner of the test piece with tweezers and measure the container weighed in advance. Transfer the test piece to. At this time, after the flat net is raised from the oil surface to start stationary, do not exceed 30 seconds until it is transferred to the measurement container.
(5) The mass of the measurement container containing the test piece is measured by an electronic balance, and the mass of the measurement container is subtracted from the measured value to calculate the mass of the test piece after oil absorption. And the oil absorption amount per 1 m ² is calculated by the following equation.
Oil absorption (g / m ² ) = ((mass of test piece measured by (4) above)-(mass of test piece measured by (1)) × 100 (note: converted to m ² ) Because, 100 times)

[Color crying]
It measured as follows based on the color crying test method (Daimaru method) which measures a color fastness degree. First, a sample obtained by sewing a test piece according to each example on a white cloth, a 0.02% sodium hypochlorite solution (denoted as "hypo" in the table), 76% alcohol, and 2 cm of the test piece dipped in detergent Do. After 2 hours, the sample is pulled up and naturally dried to determine the degree of contamination of the test piece from the white cloth. The determination is made on a staining gray scale based on the JIS L 0801 dyeing fastness test method. In addition, the fifth grade shows no color crying, the fourth to fifth grades show little color crying, and the fourth grade and below show the color crying.

  Looking at the results of each test, Example 1 and Example 2 did not show any discoloration during the abrasion resistance test. Moreover, also in the test of color crying, Example 1 and Example 2 have no color crying at all in the evaluation of the fifth grade. On the other hand, in Comparative Examples 2 to 8, color fading occurs, and the color crying test is less than the fifth grade.

  On the other hand, Example 1 and Example 2 have very high abrasion resistance in the spunbonded nonwoven fabric surface, and the abrasion resistance in the pulp fiber surface is also comparable to the 100% rayon comparative example 6 It is higher than Comparative Example 7 of the rayon / polyester mixture, and is almost the same as Comparative Example 8, and can be used in the same manner as these conventional examples.

  That is, in Example 1 and Example 2, the entanglement between the pulp fiber and the synthetic resin fiber is firm, and there is no occurrence of discoloration etc., and sufficient use is made on the spunbonded nonwoven fabric surface and the pulp fiber surface. Can be used properly.

  Furthermore, when the example and the comparative example are compared, the dry tensile strength in the longitudinal direction and the lateral direction is not particularly low in the example, and the water absorption amount and the oil absorption amount are sufficiently expressed. From these results, the embodiment of the present invention is a non-woven duster which is excellent in liquid absorption and abrasion resistance, easy to use properly on the front and back, and difficult to be discolored.

Claims (4)

A pulp-blended non-woven fabric in which pulp fibers are hydroentangled from one side with respect to a spunbond non-woven fabric made of synthetic resin fibers,
The basis weight is 40 to 70 g / m ² ,
The basis weight of the spunbonded nonwoven fabric is 10 to 25 g / m ² ,
The proportion of pulp fiber is 60 to 80% by mass, and the proportion of spunbonded nonwoven fabric is 20 to 40% by mass,
The synthetic resin fiber constituting the spunbonded nonwoven fabric is a colored fiber to which a coloring agent is kneaded and colored.
And the color of the colored fiber which comprises the said pulp fiber and a spun bond nonwoven fabric differs, The nonwoven fabric characterized by the above-mentioned.   The pulp fiber is a non-colored bleached pulp and contains 95% by mass or more of NBKP, and the synthetic resin fiber is colored to a color other than white, and the thickness is 18 to 22 μm. Non-woven duster described. Laminating a dry pulp sheet on a spunbond non-woven fabric having a basis weight of 10 to 25 g / m ² of synthetic resin fibers into which a coloring agent is kneaded and colored;
A hydroentanglement step of jetting a water flow from the nozzle having a nozzle diameter of 0.5 to 1.5 mmφ onto the dry pulp sheet surface;
A method for producing a non-woven duster, characterized by comprising:   The pulp fiber is a non-colored bleached pulp and contains 95% by mass or more of NBKP, and the synthetic resin fiber is colored to a color other than white, and the thickness is 18 to 22 μm. The manufacturing method of the nonwoven fabric duster of description.