Cleaning member and cleaning tool

Abstract

To provide a cleaning member and a cleaning tool which are excellent in slipperiness, handlability, and workability with respect to an antislip floor surface or the like with a high friction coefficient, for example, while maintaining excellent cleaning property.SOLUTION: A cleaning member 1 has a plurality of fiber bundles 12 raised on the surface of a basic cloth 11. The fiber bundles 12 have first cut pile yarns 12a composed of monofilaments and second cut pile yarns 12b composed of multifilaments. The first cut pile yarns 12a appear from a raised surface formed by the second cut pile yarns 12b being raised or have the same pile heights as the raised surface, a proportion of the pile height of the second cut pile yarn 12b in terms of the pile height of the first cut pile yarns 12a is between 0.4 and 1, the fiber diameter of the monofilament is between 60 μm and 300 μm, and the single fiber fineness of the multifilament is between 0.01 dtex and 13 dtex.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cleaning member and a cleaning tool that can be applied to cleaning tools such as mops and brushes. [Background technology]

[0002] As a cleaning member for efficiently cleaning floor surfaces, for example, flat mops are used. Conventional flat mops absorb water into pile fabrics, nonwoven fabrics, sponges, etc., and wipe off dirt from the floor surface together with the water. Among these, three-dimensional fabrics have excellent cleaning properties because they can be brought into contact with uneven surfaces on the floor. However, in recent years, with the emergence of floor surfaces with excellent slip resistance, conventional flat mops using pile fabrics, etc. have become less slippery during cleaning, and so it has become an issue to balance ease of handling, workability, and cleaning properties.

[0003] That is, in conventional cleaning members using pile fabric, the handling, workability and cleaning properties differ depending on the mechanical strength of the pile yarn. For example, when using a pile fabric with a low mechanical strength of the pile yarn, such as the towel cloth described in Patent Document 1, the rubbing force of the pile yarn required to remove stubborn dirt is insufficient. In addition, the pile yarn is prone to collapse due to its low mechanical strength, so that the tip of the pile yarn is unlikely to come into contact with an uneven surface such as a floor surface, making it difficult to remove dirt. Furthermore, when cleaning by absorbing water into the pile fabric, when it is brought into contact with a floor surface, a large amount of the absorbed water is discharged due to the collapse of the pile yarn, resulting in low moisture retention. In addition, the contact area of ​​the pile fabric when it is brought into contact with a floor surface is large, so the friction load between the floor surface and the pile fabric is also large, resulting in a decrease in slipperiness and making it difficult for the pile fabric to move smoothly.

[0004] On the other hand, when using pile yarns with high mechanical strength, the fiber diameter of the pile yarns is large, so the density is low, and the volume of the voids in the pile fabric is also small, so the water retention is also reduced. Also, since the distance between the pile yarns is wide, the uniformity of cleaning is reduced and unevenness in dirt removal is likely to occur. Furthermore, the retention of dirt removed from floor surfaces, etc. is also low, which causes the problem of poor removal performance.

[0005] In order to solve these problems, a cleaning member has been proposed in which a belt-shaped region made of pile yarns with low mechanical strength and a region made of pile yarns with high mechanical strength are arranged in parallel and alternately with respect to the pile yarns raised from the base fabric (for example, Patent Document 2). However, when the cleaning member is brought into contact with a floor surface or the like, the region made of pile yarns with high mechanical strength makes strong contact, while the region made of pile yarns with low mechanical strength makes weak contact, resulting in insufficient contact with the floor surface or the like and a problem of low cleaning power. In order to improve the cleaning power, it is conceivable to increase the density of the pile yarns in the region made of pile yarns with low mechanical strength, but in that case, the region made of pile yarns with high mechanical strength is supported by the region made of pile yarns with low mechanical strength, so the rigidity of the pile fabric increases. As a result, the friction load increases, the slipperiness decreases, and smooth movement of the pile fabric becomes difficult.

[0006] It is also possible to use a piled fabric having a core-sheath composite yarn (pile yarn) in which the core is made of fibers having a thick single yarn fineness and the sheath is made of fibers having a thin single yarn fineness, as in the case of the piled cleaning fabric described in Patent Document 3, for the cleaning member. However, the mechanical strength of the core-sheath composite yarn is low because the fineness of the core is small, and Patent Document 3 does not disclose the density of the core-sheath composite yarn. Therefore, in such a piled fabric, the piled yarn is likely to fall over, and the fibers of the sheath are buried in the fibers of the core. As a result, the contact area between the piled yarn and the floor surface, etc. increases, and the friction between them increases. This reduces the slipperiness of the cleaning member, making it difficult for the cleaning member to move smoothly on the floor surface. In particular, the cleaning member of Patent Document 3 has a problem that it is not suitable for use on anti-slip floor surfaces with a high friction coefficient. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 3-27149 [Patent Document 2] JP 2016-158779 A [Patent Document 3] JP 2003-306851 A Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made in consideration of the above problems, and its object is to provide a cleaning member and cleaning tool that maintain good cleaning properties while having excellent slipperiness, ease of handling and workability, even on anti-slip floor surfaces with a high friction coefficient, for example. [Means for solving the problem]

[0009] In order to solve the above-mentioned problems, the cleaning member and cleaning tool of the present invention are characterized in that the cleaning member has a plurality of fiber bundles raised on the surface of a base fabric, the fiber bundles having a first cut pile yarn made of monofilament and a second cut pile yarn made of multifilament, the first cut pile yarn is exposed from a raised surface formed by the standing of the second cut pile yarn or has the same pile height as the raised surface, the ratio of the pile height of the second cut pile yarn to the pile height of the first cut pile yarn is in the range of 0.4 to 1, the fiber diameter of the monofilament is in the range of 60 μm to 300 μm, and the single yarn fineness of the multifilament is in the range of 0.01 dtex to 13 dtex.

[0010] According to the above-mentioned configuration, a fiber bundle including a first cut pile yarn made of a monofilament and a second cut pile yarn made of a multifilament is raised from the surface of a base fabric. The monofilament is made of a thick single fiber having a fiber diameter of 60 μm or more and 300 μm or less, and the multifilament is made of a plurality of fibers having a single yarn fineness in the range of 0.01 dtex or more and 13 dtex or less, and is thinner than the monofilament. Therefore, in the above-mentioned configuration, the stiffness of the first cut pile yarn is greater than that of the second cut pile yarn. Also, in the above-mentioned configuration, the pile height of the second cut pile yarn is set within a range of 0.4 to 1 with respect to the pile height of the first cut pile yarn, so that the first cut pile yarn is exposed from the raised surface of the second cut pile yarn, or the pile height of the first cut pile yarn is set to be the same as the height of the raised surface. Therefore, during cleaning, the first cut pile yarn abuts against the floor surface, etc. more strongly than the second cut pile yarn, and as a result, the pressure from the floor surface, etc. on the second cut pile yarn is reduced, and the occurrence of the falling of the second cut pile yarn can be suppressed or reduced. Furthermore, since the first cut pile yarn is thicker than the second cut pile yarn, even if the floor surface, etc., has fine irregularities, the first cut pile yarn is less likely to get caught in the recesses. As a result, the cleaning member of the above configuration can maintain good slipperiness even on, for example, a non-slip floor surface, and is excellent in handleability and workability. Furthermore, since the second cut pile yarn of the above configuration is thinner than the first cut pile yarn, even if the floor surface, etc., has fine irregularities, the second cut pile yarn can penetrate into the recesses and remove dirt well.

[0011] In the above-mentioned configuration, the multifilament is preferably made of a shrink-processed yarn, and the shrink rate of the shrink-processed yarn is preferably in the range of 1% or more and 60% or less. By using a multifilament made of a shrink-processed yarn having a shrink rate of 1% or more, the contact area of ​​the second cut pile yarn with the floor surface or the like can be increased. This improves the cleaning performance. Even when cleaning with water or a cleaning solution, the water retention performance can be well maintained, and the absorbed water can be prevented from being excessively discharged during cleaning. On the other hand, by using a multifilament made of a shrink-processed yarn having a shrink rate of 60% or less, the slipperiness on the floor surface or the like can be prevented from being excessively reduced.

[0012] In the above-mentioned configuration, it is preferable that the total fineness of the first cut pile yarns in the fiber bundle is within the range of 40 to 1000 dtex, the total fineness of the second cut pile yarns in the fiber bundle is within the range of 100 to 700 dtex, and the ratio of the total fineness of the second cut pile yarns to the total fineness of the first cut pile yarns is within the range of 0.1 to 18. This makes it possible to provide a cleaning member that has an even better balance between cleaning ability, water retention, etc., and slipperiness.

[0013] Further, in the above-mentioned structure, the bundle density of the fiber bundle is 500 bundles / inch. 2 More than 3500 bundles / inch 2 The fiber bundle density is preferably within the following range: 500 bundles / inch 2 By setting the fiber bundle density at 3,500 bundles / inch or more, cleaning performance and water retention performance can be maintained at a good level. 2 By setting the size as described below, it is possible to prevent the contact area between the first cut pile yarns and the second cut pile yarns and the floor surface or the like from increasing excessively, and to maintain good slipperiness.

[0014] In the above-mentioned construction, it is preferable that the second cut pile yarns are opened.

[0015] In order to solve the above problems, a cleaning tool according to the present invention is characterized by including the above cleaning member. Effect of the Invention

[0016] According to the present invention, a cleaning member and cleaning tool that are easy to handle and work with can be provided by exhibiting good slipperiness even on non-slip floor surfaces with a high friction coefficient, while maintaining good cleaning properties and the ability to retain water, cleaning liquid, etc. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a schematic cross-sectional view illustrating a cleaning member according to an embodiment of the present invention. [Diagram 2] 1 is a perspective view showing a schematic diagram of a cleaning tool including a cleaning member according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] (Cleaning materials) A cleaning member according to an embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a schematic cross-sectional view showing the cleaning member according to the present embodiment.

[0019] 1, the cleaning member 1 according to this embodiment includes at least a base fabric 11, a plurality of fiber bundles 12 raised on the surface of the base fabric 11, and a backcoat layer 13 provided on the back surface of the base fabric 11. In this specification, the front surface of the base fabric 11 means the surface on which the fiber bundles 12 are raised and standing, and the back surface of the base fabric 11 means the surface opposite to the surface on which the fiber bundles 12 are raised and standing.

[0020] In this embodiment, the base fabric 11 is formed of a woven fabric obtained by weaving the ground yarns of the warp threads 14 and the weft threads 15. In this embodiment, the weaving structure of the warp threads 14 and the weft threads 15 is not particularly limited, and examples thereof include plain weave, twill weave, satin weave, leno weave, and variations thereof. The term "weaving structure" refers to a pattern of the weaving of the warp threads 14 and the weft threads 15. The term "plain weave" refers to a weaving structure in which each weft thread 15 passes alternately above and below the warp threads 14, and each warp thread 14 passes alternately above and below the weft threads 15. The term "twill weave" refers to a weaving structure (or weaving method) in which two (or three) warp threads cross over the weft thread and one crosses under the weft thread. The term "satin weave" refers to a weaving structure (or weaving method) in which five or more warp threads and five or more weft threads each form a complete structure, and the crossing points are at regular intervals and are not adjacent to each other. "Leno weave" refers to a coarse weave (or weaving method) in which two warp threads are twisted and woven into a weft thread. Furthermore, "variations of these weaves" refers to plain weave, twill weave, satin weave, and / or leno weave with some weaving methods changed.

[0021] The warp yarn 14 and the weft yarn 15 may each be a spun yarn (i.e., a yarn made by bundling and twisting together short staple fibers), a monofilament yarn (i.e., a yarn made by bundling and twisting together long staple fibers), a multifilament yarn made up of a bundle of multiple monofilament yarns, a doubled yarn, or a pulled yarn.

[0022] The materials constituting the warp threads 14 and the weft threads 15 are not particularly limited. For example, synthetic fibers such as polyamide fibers such as nylon (registered trademark) fibers and aramid fibers; polyester fibers such as polyethylene terephthalate fibers and polyarylate fibers; acrylic fibers such as polyacrylonitrile fibers; polyolefin fibers such as polyethylene fibers and polypropylene fibers; and fluorine fibers such as polytetrafluoroethylene fibers are included. In addition, regenerated fibers such as rayon fibers and cupra fibers, and semi-synthetic fibers such as cellulose acetate fibers such as acetate fibers and triacetate fibers are also included. Furthermore, natural fibers such as hemp, cotton, and wool are also included. The warp threads 14 and the weft threads 15 may be made of one type of synthetic fiber, regenerated fiber, semi-synthetic fiber, or natural fiber exemplified above, or at least two or more types may be mixed together.

[0023] The total fineness of the warp yarns 14 and the weft yarns 15 is preferably in the range of 100 dtex or more and 2000 dtex or less, and more preferably in the range of 140 dtex or more and 1200 dtex or less. By making the total fineness 100 dtex or more, the rigidity of the warp yarns 14 and the weft yarns 15 can be well maintained and the mechanical strength of the base fabric 11 can be prevented from decreasing. As a result, the base fabric 11 can maintain good shape retention and the root portion of the fiber bundle 12 can be tightened. On the other hand, by making the total fineness 2000 dtex or less, the thickness of the base fabric 11 can be prevented from becoming excessively large and flexibility can be maintained. As a result, for example, even when the cleaning member 1 of this embodiment is used to contact a curved surface, it can be made to follow the shape of the curved surface well.

[0024] In this specification, the "total fineness" of the warp yarns 14 and the weft yarns 15 refers to the total fineness of the yarns constituting the warp or weft weave unit of the fabric, and when the smallest unit of the weave is a single thread such as a monofilament, it means the fineness of that single thread, and when the smallest unit of the weave is a twisted yarn (multifilament yarn), a doubling yarn, or a paralleled yarn, it means the total fineness of the constituent yarns. When the smallest unit of the weave is a spun yarn, the numerical range of the total fineness of the warp yarns 14 and the weft yarns 15 is expressed as a value obtained by converting the "count", a unit of spun yarn thickness, into the SI unit "dtex" by a known conversion method. Furthermore, the total fineness (dtex) is expressed as the weight (g) of each single yarn per 10,000 m, and is obtained by a method conforming to JIS L1013 (2010).

[0025] In addition, when the warp yarns 14 and the weft yarns 15 are made of multifilament yarns, the single yarn fineness is preferably in the range of 0.5 dtex or more and 100 dtex or less, more preferably in the range of 2 dtex or more and 30 dtex or less, and even more preferably in the range of 6 dtex or more and 10 dtex or less. By setting the single yarn fineness to 0.5 dtex or more, the rigidity of the warp yarns 14 and the weft yarns 15 can be well maintained and the mechanical strength of the base fabric 11 can be prevented from decreasing. As a result, the base fabric 11 can be well maintained in shape retention and the root portion of the fiber bundle 12 can be tightened. On the other hand, by setting the single yarn fineness to 100 dtex or less, the thickness of the base fabric 11 can be prevented from becoming excessively thick and flexibility can be maintained. As a result, for example, even when the cleaning member 1 of this embodiment is used to contact a curved surface, it can be well conformed to the shape of the curved surface. In this specification, the "single yarn fineness" is a value obtained by dividing the total fineness obtained in accordance with JIS L1013 (2010) by the number of single yarns.

[0026] In this embodiment, the base fabric 11 is described as a woven fabric obtained by weaving ground yarns of warp yarns 14 and weft yarns 15, but the present invention is not limited to this embodiment. For example, the base fabric 11 may be a knitted fabric consisting of weft yarns only. When the base fabric 11 is a knitted fabric, the knitting structure is not particularly limited, and examples thereof include circular knitting and weft knitting. When the base fabric 11 is a knitted fabric, the weft yarn used is not particularly limited, and for example, the same yarn as the warp yarns 14 and weft yarns 15 described above can be used.

[0027] The fiber bundle 12 is raised at the portion protruding upward from each weave of the base fabric 11, with the spacing between the fibers constituting the fiber bundle 12 being wider. The fiber bundle 12 is composed of a first cut pile yarn 12a and a second cut pile yarn 12b. The first cut pile yarn 12a is made of a monofilament composed of one filament yarn (long fiber yarn). By using a monofilament as the first cut pile yarn 12a, the rigidity of the first cut pile yarn 12a can be well maintained, and the occurrence of the collapse of the first cut pile yarn 12a and the second cut pile yarn 12b can be suppressed or reduced. As a result, even when cleaning an anti-slip floor surface with a high friction coefficient, for example, friction with the anti-slip floor surface can be reduced, and the slipperiness and cleaning properties can be improved. The second cut pile yarn 12b is made of a multifilament yarn composed of a bundle of multiple filament yarns (long fiber yarns). It is preferable that the multiple filament yarns constituting the second cut pile yarn 12b are open. The degree of the spread width is not particularly limited and can be set appropriately. In this embodiment, the first cut pile yarns 12a and the second cut pile yarns 12b do not include loop pile yarns. By making the first cut pile yarns 12a and the second cut pile yarns 12b into cut pile yarns, it becomes easier to remove collected dirt and the like during cleaning. Furthermore, even if there are protrusions on the floor surface, the first cut pile yarns 12a and the second cut pile yarns 12b can be prevented from getting caught on the protrusions, and a decrease in smoothness can be suppressed.

[0028] In this embodiment, the fiber bundles 12 are woven into the base fabric 11 in a so-called W weave. That is, as shown in Fig. 1, the fiber bundles 12, which are made of parallel yarns including first cut pile yarns 12a and second cut pile yarns 12b, are woven into the base fabric 11 so as to pass under one weft yarn 15, then over the adjacent weft yarn 15, and then pass under the adjacent weft yarn 15. That is, the fiber bundles 12 are woven into the W weave so as to form a W shape across the three weft yarns 15 of the base fabric 11. Note that, as a method of weaving the fiber bundles 12, in addition to the W weave, a V weave in which the fiber bundles 12 are raised against the base fabric 11 in an inclined state, or a U weave in which the fiber bundles 12 are raised in a direction substantially perpendicular to the base fabric 11 may be used.

[0029] Examples of the first cut pile yarn 12a include pile yarns such as straight hair yarns, slant hair yarns, and crimped yarns (false twisted yarns). Of these, in this embodiment, straight hair yarns are preferred from the viewpoint of the pressure when the yarns come into contact with a floor surface, etc. In addition, examples of the second cut pile yarn 12b include pile yarns such as straight hair yarns, slant hair yarns, and crimped yarns (false twisted yarns). Of these, in this embodiment, crimped yarns are preferred. By using crimped yarns, it is possible to improve the dust collection performance and water and cleaning solution retention performance without increasing the number of second cut pile yarns 12b per unit area, compared to the case of using straight hair yarns, for example. In addition, in order to obtain crimped yarns, the yarns are twisted while heated, and then further twisted in the opposite direction.

[0030] When the second cut pile yarn 12b (multifilament) is a shrink-processed yarn, the shrinkage rate is preferably in the range of 1% to 60%, more preferably in the range of 1% to 50%, even more preferably in the range of 5% to 40%, and particularly preferably in the range of 10% to 20%. By making the shrinkage rate of the multifilament 1% or more, the contact area of ​​the second cut pile yarn 12b with the floor surface or the like can be well maintained. This makes it possible to maintain good cleaning performance. Also, when cleaning is performed by making the cleaning member 1 absorb water or cleaning liquid, etc., when the cleaning member 1 is brought into contact with the floor surface or the like, the absorbed water, etc. is prevented from being discharged in large amounts, and the water retention performance can be well maintained. On the other hand, by making the shrinkage rate of the multifilament 60% or less, it is possible to prevent the slipperiness on the floor surface or the like from being excessively reduced.

[0031] In this specification, the "shrinkage rate" can be obtained, for example, by the following method. That is, the shrinkage rate is calculated based on the length L1 (mm) when an initial load of 0.18 mN x the indicated tex is applied to the sample, and the length L2 (mm) when a load of 4.41 mN x the indicated tex is applied. The length is measured immediately after the load is applied, and in the case of using a synthetic resin, it is measured 30 seconds after the load is applied. After the length is measured, the shrinkage rate is calculated based on the following formula. Crimp rate (%)=(L2-L1) / L2×100

[0032] The fiber diameter of the first cut pile yarn 12a (monofilament) is in the range of 60 μm or more and 300 μm or less, preferably in the range of 80 μm or more and 250 μm or less, and more preferably in the range of 100 μm or more and 200 μm or less. By making the fiber diameter of the monofilament 60 μm or more, the mechanical strength of the first cut pile yarn 12a is maintained well, and the occurrence of the falling of the pile of the first cut pile yarn 12a can be suppressed or reduced. On the other hand, by making the fiber diameter of the monofilament 300 μm or less, the pressing force of the first cut pile yarn 12a against the floor surface or the like becomes large, and the excessive increase in slipperiness is suppressed. As a result, the contact of the second cut pile yarn 12b with the floor surface or the like is maintained well, and excellent cleaning properties are maintained.

[0033] The single yarn fineness (filament yarn fineness) of the second cut pile yarn 12b (multifilament) is in the range of 0.01 dtex or more and 13 dtex or less, more preferably in the range of 0.3 dtex or more and 7 dtex or less, and even more preferably in the range of 2 dtex or more and 5 dtex or less. By setting the single yarn fineness of the multifilament to 0.01 dtex or more, the mechanical strength of the second cut pile yarn 12b can be favorably maintained and the occurrence of pile collapse of the second cut pile yarn 12b can be reduced or suppressed. In addition, the contact area of ​​the second cut pile yarn 12b with the floor surface or the like can be favorably maintained and a decrease in cleaning ability and water retention performance can be prevented. On the other hand, by setting the single yarn fineness of the multifilament to 13 dtex or less, the contact area of ​​the second cut pile yarn 12b with the floor surface or the like can be prevented from becoming excessively large and favorable slipperiness can be maintained.

[0034] The first cut pile yarn 12a is exposed from the raised surface formed by the second cut pile yarn 12b standing upright on the base fabric 11. Alternatively, the pile height of the first cut pile yarn 12a may be the same as the height of the raised surface of the second cut pile yarn 12b. The ratio of the pile height of the second cut pile yarn 12b to the pile height of the first cut pile yarn 12a (pile height ratio) is in the range of 0.4 to 1, preferably in the range of 0.5 to 0.9, and more preferably in the range of 0.6 to 0.8. The pile height means the distance from the base fabric 11 to the tip of the first cut pile yarn 12a or the second cut pile yarn 12b. By setting the pile height ratio to 1 or less, the first cut pile yarn 12a is exposed from the raised surface of the second cut pile yarn 12b, or the pile height of the first cut pile yarn 12a is made the same as the height of the raised surface. This allows the first cut pile yarns 12a to receive stronger pressure from the floor surface, etc. than the second cut pile yarns 12b during cleaning. In other words, by reducing the pressure from the floor surface, etc. on the second cut pile yarns 12b and increasing the pressure from the floor surface, etc. on the first cut pile yarns 12a, friction between the second cut pile yarns 12b and the floor surface, etc. is reduced, and the sliding properties on the floor surface, etc. are improved. As a result, the cleaning member 1 of this embodiment can improve the handling and workability, and can also suppress or reduce the occurrence of pile collapse of the second cut pile yarns 12b. On the other hand, by setting the pile height ratio to 0.4 or more, excessive reduction in friction of the second cut pile yarns 12b with the floor surface, etc. during cleaning can be suppressed, and good cleaning properties by the second cut pile yarns 12b can be maintained.

[0035] The pile height of the first cut pile yarn 12a is preferably within the range of 3 mm to 20 mm, more preferably within the range of 4 mm to 15 mm, and even more preferably within the range of 5 mm to 10 mm, within the range of the above-mentioned pile height ratio. By setting the pile height of the first cut pile yarn 12a to 3 mm or more, the cleaning ability and water retention of the first cut pile yarn 12a can be maintained at a good level. On the other hand, by setting the pile height of the first cut pile yarn 12a to 20 mm or less, it is possible to prevent the rigidity of the first cut pile yarn 12a from being excessively reduced, which in turn prevents the cleaning ability from being reduced. When there are multiple first cut pile yarns 12a in the fiber bundle 12, it is preferable that the height of each of the first cut pile yarns 12a is uniform.

[0036] The pile height of the second cut pile yarn 12b (if the second cut pile yarn 12b is a crimped yarn, the pile height in the crimped state) is preferably in the range of 3 mm to 20 mm, more preferably in the range of 4 mm to 15 mm, and even more preferably in the range of 5 mm to 10 mm, within the above-mentioned range of pile height ratio. By setting the pile height of the second cut pile yarn 12b to 3 mm or more, the cleaning ability and water retention performance of the second cut pile yarn 12b can be maintained at a good level. On the other hand, by setting the pile height of the second cut pile yarn 12b to 20 mm or less, it is possible to prevent the rigidity of the second cut pile yarn 12b from being excessively reduced, which in turn prevents the cleaning ability from being deteriorated. It is preferable that the height of the filament yarn constituting the second cut pile yarn 12b is uniform. Furthermore, when the second cut pile yarn 12b is made of shrink-processed yarn, the pile length of the second cut pile yarn 12b (i.e., the length from the base fabric 11 to the tip of the second cut pile yarn 12b when it is stretched) can be appropriately set according to the pile height and shrink rate of the second cut pile yarn 12b to be set.

[0037] The ratio of the total fineness of the second cut pile yarns 12b in the fiber bundle 12 to the total fineness of the first cut pile yarns 12a in the fiber bundle 12 (total fineness ratio) is preferably in the range of 0.1 to 18, more preferably in the range of 0.3 to 9, and even more preferably in the range of 0.7 to 5. By making the total fineness ratio 0.1 or more, it is possible to maintain good cleaning performance and water retention performance. On the other hand, by making the total fineness ratio 18 or less, it is possible to reduce the number of second cut pile yarns 12b that come into contact with the floor surface, etc., and to prevent the cleaning performance of the cleaning member 1 from decreasing.

[0038] Here, the total fineness of the first cut pile yarns 12a in the fiber bundle 12 means the sum of the finenesses of the first cut pile yarns 12a (monofilaments) present in the fiber bundle 12. For example, if the fineness of the first cut pile yarns 12a is 40 dtex and the number of filaments is 2, the total fineness of the first cut pile yarns 12a in the fiber bundle 12 is 40 dtex x 2 = 80 dtex. The total fineness of the first cut pile yarns 12a in the fiber bundle 12 is preferably in the range of 40 dtex to 1000 dtex, more preferably in the range of 70 dtex to 700 dtex, and even more preferably in the range of 90 dtex to 450 dtex, within the numerical range of the total fineness ratio mentioned above. By making the total fineness of the first cut pile yarns 12a in the fiber bundle 12 40 dtex or more, the first cut pile yarns 12a maintain a gap with the floor surface, preventing excessive friction of the second cut pile yarns 12b with the floor surface and allowing cleaning with less friction load.On the other hand, by making the total fineness of the first cut pile yarns 12a in the fiber bundle 12 1000 dtex or less, the second cut pile yarns 12b come into contact with the floor surface with moderate pressure and can exert a high cleaning power.

[0039] The number of monofilaments in the fiber bundle 12 is preferably in the range of 1 to 20, more preferably in the range of 1 to 10, and even more preferably in the range of 1 to 5, within the numerical range of the ratio of the number of filaments described above. By making the number of monofilaments 1 or more, cleaning with less friction load can be performed. On the other hand, by making the number of monofilaments 20 or less, high cleaning power can be exhibited. In this specification, "the number of monofilaments" means the number of monofilaments contained in the fiber bundle 12.

[0040] The total fineness of the second cut pile yarns 12b in the fiber bundle 12 means the sum of the finenesses of the second cut pile yarns 12b (multifilament) present in the fiber bundle 12. For example, if the single yarn fineness of the second cut pile yarns 12b is 3.5 dtex and the number of filaments of the filament yarns constituting the second cut pile yarns 12b is 96, the total fineness is 3.5 dtex x 96 = 336 dtex. The total fineness of the second cut pile yarns 12b in the fiber bundle 12 is preferably in the range of 100 dtex to 700 dtex, more preferably in the range of 200 dtex to 600 dtex, and even more preferably in the range of 300 dtex to 500 dtex, within the numerical range of the total fineness ratio mentioned above. By making the total fineness of the second cut pile yarns 12b in the fiber bundle 12 100 dtex or more, sufficient cleaning ability and water retention can be exhibited. On the other hand, by making the total fineness of the second cut pile yarns 12b in the fiber bundle 12 700 dtex or less, the friction load with the floor surface can be reduced.

[0041] The fiber diameter of the filament yarns constituting the multifilament is not particularly limited, and is usually within the range of 1 μm to 35 μm, preferably within the range of 5 μm to 30 μm, and more preferably within the range of 10 μm to 25 μm.

[0042] The bundle density of the fiber bundles 12 (the number of fiber bundles 12 present per unit area) is 500 bundles / inch 2More than 3500 bundles / inch 2 The following range is preferable: 750 bundles / inch 2 More than 2500 bundles / inch 2 The following range is more preferable: 1000 bundles / inch 2 More than 2000 bundles / inch 2 The following range is more preferable: The bundle density of the fiber bundles 12 is 500 bundles / inch 2 By setting the density of the fiber bundles 12 at 3,500 bundles / inch or more, cleaning performance and water retention performance can be maintained at a good level. 2 By setting the size as described below, it is possible to prevent the contact area between the first cut pile yarns 12a and the second cut pile yarns 12b and the floor surface or the like from increasing excessively, and to maintain good slipperiness.

[0043] The fibers constituting the monofilaments constituting the first cut pile yarns 12a and the multifilaments constituting the second cut pile yarns 12b are not particularly limited, and examples thereof include synthetic fibers such as polyamide fibers such as nylon fibers and aramid fibers; polyester fibers such as polyethylene terephthalate (PET) fibers, polylactic acid (PLA) fibers, polytrimethylene terephthalate (PTT) fibers, polybutylene terephthalate (PBT) fibers, polypropylene terephthalate (PPT) fibers, polyethylene naphthalate (PEN) fibers, and polyarylate fibers; acrylic fibers such as polyacrylonitrile fibers; polyolefin fibers such as polyethylene fibers and polypropylene fibers; and fluorine fibers such as polytetrafluoroethylene fibers. Other examples include regenerated fibers such as rayon fibers and cupra fibers; and semi-synthetic fibers such as cellulose acetate fibers such as acetate fibers and triacetate fibers. Other examples include natural fibers such as hemp, cotton, and wool. In addition, the multifilament may be made of one of the above-mentioned synthetic, regenerated, semi-synthetic or natural fibers, or a mixture of at least two or more of them. Of the above-mentioned fibers, polyester fibers, which tend to generate static electricity due to friction, are preferred because of their excellent ability to collect dirt, dust, and airborne particles. The monofilaments constituting the first cut pile yarns 12a and the filament yarns constituting the second cut pile yarns 12b may be of the same type or different types.

[0044] The backcoat layer 13 is provided on the back side of the base fabric 11 (the side opposite to the surface on which the fiber bundles 12 are raised). By providing the backcoat layer 13, the back side of the base fabric 11 can be made flat. In addition, the backcoat layer 13 is preferably water-resistant. This makes it possible to prevent water or a cleaning solution from seeping out to the back side of the base fabric 11 when the fiber bundles 12 are absorbed. The material of the backcoat layer 13 is not particularly limited, and examples thereof include styrene butadiene rubber, butadiene rubber, and acrylic resin.

[0045] The thickness of the backcoat layer 13 is not particularly limited, but is usually in the range of 0.01 mm or more and 1 mm or less, preferably in the range of 0.05 mm or more and 0.8 mm or less, and more preferably in the range of 0.1 mm or more and 0.5 mm or less. By making the thickness of the backcoat layer 13 0.01 mm or more, the mechanical strength and waterproofness of the cleaning member 1 itself can be well maintained. On the other hand, by making the thickness of the backcoat layer 13 1 mm or less, the softness and flexibility of the cleaning member 1 can be prevented from being excessively reduced.

[0046] (Cleaning tools) The cleaning member 1 of this embodiment can be applied to a cleaning tool 2 used for cleaning floor surfaces, for example, as shown in Fig. 2. Fig. 2 is a perspective view that shows a schematic view of the cleaning tool 2 equipped with the cleaning member 1 of this embodiment.

[0047] The cleaning tool 2 includes at least a cleaning head portion 21, a rod-shaped handle portion 22, and a grip portion 23. The cleaning tool 2 is a wet mop for wet cleaning and wiping off liquid spilled on floor surfaces, etc.

[0048] The cleaning head 21 has a flat plate shape in a plan view. A connecting part 21a for connecting the handle part 22 is provided at the center of the upper surface of the cleaning head 21. The connecting part 21a is configured by a rotation mechanism that can be freely tilted in the longitudinal direction X and the width direction Y perpendicular to the longitudinal direction X. In addition, the cleaning member 1 is detachably attached to the lower surface side of the cleaning head 21 by double-sided tape, hook-and-loop fastener, or the like. More specifically, the cleaning member 1 is attached so as to cover the entire lower surface of the cleaning head 21 with the back coat layer 13 of the cleaning member 1 in contact with the lower surface of the cleaning head 21.

[0049] The user grasps the gripping portion 23 and moves the cleaning head portion 21 to move the cleaning tool 2 while pressing it against the object to be cleaned, such as a floor surface, via the cleaning member 1. This makes it easy to wipe the object to be cleaned. Cleaning with the cleaning tool 2 can be performed not only when the cleaning member 1 is in a dry state, but also when it is in a wet state where water or a liquid detergent has been absorbed (impregnated) therein. In the cleaning member 1 of this embodiment, the second cut pile yarn 12b has excellent water retention performance. Therefore, even when wet cleaning is performed, cleaning can be performed without excessively draining water. In addition, the cleaning member 1 of this embodiment has improved slipperiness while maintaining good cleaning properties. Therefore, for example, even when cleaning a non-slip floor surface, dirt can be wiped off while smoothly moving the cleaning member 1, and it is easy to handle and work with.

[0050] In the present embodiment, the cleaning member 1 is applied to the cleaning tool 2, but the present invention is not limited to this embodiment. For example, the cleaning member 1 of the present embodiment can be suitably used in a rechargeable electric wet cleaning device. EXAMPLES

[0051] (Examples 1 to 18) In Examples 1 to 18, cleaning members were prepared that had a base fabric made of woven warp and weft, pile yarns woven into a pile weave so as to be entangled in a W-shape with the weft of the base fabric, and a backcoat layer provided on the back side of the base fabric. Each cleaning member was rectangular, measuring 20 cm (length) x 50 cm (width).

[0052] The warp and weft yarns were polyester fibers. The pile yarns used were a first cut pile yarn made of monofilament yarn made of polyester resin, and a second cut pile yarn made of multifilament yarn made of polyester resin. The back coat layer had a thickness of 0.2 mm and was made of styrene butadiene rubber (SBR). In each of Examples 1 to 18, the first cut pile yarns and the second cut pile yarns had the physical properties shown in Tables 1 to 3.

[0053] Comparative Example 1 In this comparative example, the pile yarn used was made of monofilament yarn alone having the physical properties shown in Table 1. Otherwise, the cleaning member according to this comparative example was produced in the same manner as in Example 1.

[0054] Comparative Example 2 In this comparative example, the pile yarn used was made of only multifilament yarn having the physical properties shown in Table 1. Otherwise, the cleaning member according to this comparative example was produced in the same manner as in Example 1.

[0055] Comparative Example 3 In this comparative example, a cleaning member was produced in which monofilament yarns and multifilament yarns having the physical properties shown in Table 1 were woven into a base fabric in separate rows.

[0056] (Comparative Examples 4 to 7) In Comparative Examples 4 to 7, the first cut pile yarn was made of monofilament yarn having the physical properties shown in Tables 2 and 3, and the second cut pile yarn was made of multifilament yarn having the physical properties shown in Tables 2 and 3. Otherwise, the cleaning members of each Comparative Example were produced in the same manner as in Example 1.

[0057] Comparative Example 8 In this comparative example, the first cut pile yarn was made of a multifilament yarn having the physical properties shown in Table 3, and the second cut pile yarn was made of a multifilament yarn having the physical properties shown in Table 3. Except for this, the cleaning member of this comparative example was produced in the same manner as in Example 1. In this comparative example, the value of the fineness (dtex) of the first cut pile yarn in Table 3 represents the single yarn fineness (dtex).

[0058] [Table 1]

[0059] [Table 2]

[0060] [Table 3]

[0061] (Evaluation of floor surface slipperiness and cleanability) The cleaning members produced in Examples 1 to 18 and Comparative Examples 1 to 8 were evaluated for slipperiness on an anti-slip floor surface.

[0062] Specifically, the cleaning members prepared in each of the Examples and Comparative Examples were attached to the cleaning head of a cleaning tool having the same structure as the cleaning tool shown in FIG. 2. In addition, about 30 g of soil collected from the same location was spread on the non-slip floor surface per 10 cm square. Next, the cleaning member was thoroughly immersed in water and then brought into contact with the soil-contaminated non-slip floor surface without squeezing it. Furthermore, while pressing the cleaning member against the non-slip floor surface, it was moved about 30 cm in parallel to the Y direction shown in FIG. 2 to clean the non-slip floor surface once. The evaluation of the slipperiness of the cleaning member was performed based on the following criteria. The results are shown in Tables 4 to 6. Excellent: No snagging Good: Slightly stuck Possible: Move with load applied Not possible: Does not move

[0063] The condition of the anti-slip floor surface after cleaning (cleanability) was also evaluated. The cleaning ability was evaluated based on the following criteria. The results are shown in Tables 4 to 6. Excellent: No residue left behind Good: A little bit left unwiped Acceptable: Some areas left unwiped Not possible: Cleaning not possible

[0064] (result) As can be seen from Tables 4 to 6, the cleaning members of Examples 1 to 18 had good slipperiness and cleaning ability on non-slip floor surfaces. In particular, the cleaning members of Examples 1, 2, 3, 12, 13, 16, and 17 were confirmed to have extremely good slipperiness and cleaning ability. On the other hand, the cleaning members of Comparative Examples 1 to 7 were confirmed to have good slipperiness, but were unable to clean the non-slip floor surface in a single movement. In addition, the cleaning member of Comparative Example 8 had poor slipperiness on the floor surface and was unable to clean. This is thought to be because the use of multifilament yarn as the first cut pile yarn made it impossible to obtain a sufficient fiber diameter compared to the cleaning members of each Example, and the rigidity of the first cut pile yarn was small, making it impossible to suppress or reduce the occurrence of pile collapse of the first cut pile yarn and the second cut pile yarn.

[0065] [Table 4]

[0066] [Table 5]

[0067] [Table 6] [Explanation of symbols]

[0068] 1 Cleaning materials 2 Cleaning tools 11 Base fabric 12 Fiber bundle 12a 1st cut pile yarn 12b 2nd cut pile yarn 13 Backcoat layer 14 Warp 15 Weft 21 Cleaning head 21a Connection part 22 Handle 23 Gripping part

Claims

1. A cleaning member having a plurality of fiber bundles raised on a surface of a base fabric, The fiber bundle includes a first cut pile yarn made of a monofilament and a second cut pile yarn made of a multifilament, the first cut pile yarns are exposed from a raised surface formed by the second cut pile yarns standing up, or have the same pile height as the raised surface; a ratio of a pile height of the second cut pile yarn to a pile height of the first cut pile yarn is within a range of 0.4 to 1, The fiber diameter of the monofilament is in the range of 60 μm or more and 300 μm or less, The cleaning member, wherein the single yarn fineness of the multifilament is within the range of 0.01 dtex or more and 13 dtex or less.

2. The multifilament is made of crimped yarn, The cleaning member according to claim 1 , wherein the crimp percentage of the crimped yarn is within a range of 1% or more and 60% or less.

3. the total fineness of the first cut pile yarn in the fiber bundle is within a range of 40 dtex or more and 1000 dtex or less; the total fineness of the second cut pile yarns in the fiber bundle is within a range of 100 dtex or more and 700 dtex or less; 2. The cleaning member according to claim 1, wherein a ratio of a total fineness of the second cut pile yarns to a total fineness of the first cut pile yarns is within a range of 0.1 to 18 times.

4. The bundle density of the fiber bundle is 500 bundles / inch. ２ More than 3500 bundles / inch ２ 2. The cleaning member of claim 1, wherein the thickness of the cleaning member is within the range of:

5. The cleaning member according to claim 1 , wherein the second cut pile yarns are open.

6. A cleaning tool comprising the cleaning member according to any one of claims 1 to 5.

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