JP7141252B2 - cleaning supplies - Google Patents

Description

The present invention relates to cleaning articles.

2. Description of the Related Art Conventionally, there has been known a cleaning article that has a handle inserting portion and is configured to be attachable by inserting a handle into the handle inserting portion. For example, Patent Literature 1 discloses a brush-like cleaning mop in which a large number of heat-fusible fibers are heat-sealed to a base sheet. The document also discloses that the fibers that make up the outer layer of the brush are thinner than the fibers that make up the inner layer.

Further, Patent Document 2 discloses a cleaning article that has a flat cylindrical handle insertion portion and can be attached by inserting the handle into the handle insertion portion. The same document also discloses that the handle inserting portion is formed by joining opposing handle inserting portion forming sheets, and that one or more fiber layers are provided on each of the upper and lower surfaces of the handle inserting portion. It is

JP-A-11-276402 Japanese Patent Application Laid-Open No. 2007-236690

However, since the cleaning mop described in Patent Document 1 has fibers on only one side, it is inferior in cleaning performance and convenience in cleaning the object to be cleaned. In addition, the cleaning article described in Patent Document 2 has improved cleaning performance and convenience for cleaning fine particles, fine dust, etc. by having fibers on both sides, but there is flexibility such as clumped fiber dust. In addition, there is room for improvement in the holding performance for large dust after cleaning.

Therefore, the object of the present invention is to solve the problem of cleaning flexible and large dust such as clumped fiber dust, which was a drawback of the prior art, without impairing the cleaning performance and convenience of fine particles and fine dust. To provide a cleaning article with enhanced holding performance.

The present invention is a cleaning article having a columnar cleaning part made of a plurality of fibers and a cylindrical handle insertion part located inside the cleaning part and extending along the direction in which the cleaning part extends,
The handle insertion portion is formed by joining a pair of opposing base sheets,
A fiber bundle of first fibers and a fiber bundle of second fibers having a diameter smaller than that of the first fibers are arranged on the surface of each of the base sheets opposite to the surface facing the handle insertion portion. A cleaning part is formed,
both the first fiber and the second fiber have a free end and a fixed end;
Both the fixed end of the first fiber and the fixed end of the second fiber overlap the handle insertion portion in the planar direction of the base sheet, and extend along the direction in which the handle insertion portion extends. It is joined with the base material sheet,
In a cross-sectional view of the cleaning portion, both the first fibers and the second fibers radially extend from the joint portion,
In a cross-sectional view of the cleaning part, the first fibers have a tendency to stand up against the surface of the base sheet, whereby the fiber bundles of the first fibers are perpendicular to the surface of the base sheet. It is unevenly distributed toward the direction,
In a transverse cross-sectional view of the cleaning part, the second fibers have a lodging tendency along the surface of the base sheet, whereby the fiber bundles of the second fibers are unevenly distributed near the surface of the base sheet. , provides cleaning articles.

According to the present invention, it is possible to provide a cleaning article that is flexible and has excellent ability to collect relatively large dust such as clumped cotton dust, in addition to the ability to collect fine particles.

FIG. 1 is a perspective view showing one embodiment of the cleaning article of the present invention. FIG. 2 is an exploded perspective view of the positional relationship of each component in the manufacturing process of the cleaning article of the present invention, viewed from above. 3 is a cross-sectional view of the cleaning article shown in FIG. 1 taken along line AA. FIG. 4 is a cross-sectional view of a cleaning article having mixed fiber bundles. FIG. 5(a) is a top view showing the arrangement positions of joints and dotted joint rows in the manufacturing process of the cleaning article of the present invention, and FIG. FIG. 5C is a cross-sectional view taken along line B, and FIG. 5C is a cross-sectional view taken along line CC of FIG. 5A.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on its preferred embodiments with reference to the drawings. FIG. 1 shows one embodiment of the cleaning article of the present invention. As shown in the figure, the cleaning article 1 has a columnar cleaning portion 10 and a cylindrical handle insertion portion 20 located inside the cleaning portion 10 . The cleaning article 1 shown in the figure may further include a handle 30 having a shape that can be inserted into the handle insertion portion 20 .

First, before explaining the cleaning part 10, the handle insertion part 20 will be explained. As shown in FIG. 1, the handle insertion portion 20 is a flat member positioned inside the cleaning portion 10 and extending along the longitudinal direction X, which is the direction in which the cleaning portion 10 extends. As shown in FIG. 2, the handle insertion portion 20 is formed in a cylindrical shape by a pair of base sheets 21, 21 facing each other. In the following description, when each of the pair of base sheets 21 shown in FIG. 2 is indicated individually, the base sheet 21 positioned on the upper side is also called "first base sheet 21A", and the base sheet 21 positioned on the lower side. The base sheet 21 is also called "second base sheet 21B". The base sheets 21A and 21B are collectively referred to as base sheets 21 when they are not distinguished from each other.

As shown in FIG. 2, the base sheet 21 has a substantially rectangular shape, and its longitudinal direction coincides with the longitudinal direction X of the cleaning article 1. As shown in FIG. The length of the base sheet 21 in the longitudinal direction X is preferably longer than that of the cleaning section 10 from the viewpoint of ease of inserting the handle 30 and the like. That is, in the handle insertion portion 20, the base sheet 21 forming the handle insertion portion 20 is formed to be longer than the length in the longitudinal direction X of the cleaning portion 10, so that the ends of the base sheet 21 in the longitudinal direction X are It is preferable to have an extending portion extending from at least one end in the longitudinal direction X of the cleaning portion 10 . The end of the base sheet 21 in the longitudinal direction X preferably extends from at least one end in the longitudinal direction X of the cleaning unit 10 by 1 mm or more and 40 mm or less, more preferably 1 mm or more and 30 mm or less to form an extension. is doing. The width of the base sheet 21 is substantially the same as the width of the cleaning section 10 or narrower than that.

Moreover, when focusing on one base sheet 21, the width of the base sheet 21 may be the same or may be different. For example, in the area where the cleaning part 10 exists, the width of the base material sheet 21 is set to be substantially the same as or narrower than the width of the cleaning part 10, and in the extending part, the width (the base material in the extending part The width of the sheet 21) can be narrower than the width of the base sheet 21 located in the area where the cleaning unit 10 exists. From the viewpoint of ease of inserting the handle 30, it is preferable that the extending portion formed on one base sheet 21 is not joined to the other base sheet 21 and can be separated. . From the same point of view, when the extending portion is viewed along the thickness direction of the sheet 21, the longitudinal ends of the extending portion are folded back toward the center in the longitudinal direction so that the extending portion extends the farthest. It is also preferable that the corners of the ends are rounded.

At the end of the base sheet 21 in the longitudinal direction X, a notch 23 for engaging with a hook (not shown) provided on the handle 30 is provided from the viewpoint of preventing the base sheet 21 from falling off from the handle 30. preferably. In addition, from the viewpoint of maintaining the strength of the extending portion, the ends of the base material sheet 21 in the longitudinal direction X are provided with folded portions in which the opposing surfaces are joined by folding back toward the central portion in the longitudinal direction. It is also preferable to be The cut portion 23 and the folded portion can be provided, for example, in the extension portion. The cut portion 23 and the folded portion may be formed only in one base sheet 21 or may be formed in both base sheets 21A and 21B. It may be formed only at one end, or may be formed at both ends in the longitudinal direction X of the base sheet 21 .

The first and second base sheets 21A, 21B have a width that allows the handle 30 to be inserted therein. The base sheets 21A and 21B are joined by a joining means such as heat fusion or hot melt adhesive (not shown), and the space defined by the base sheets 21A and 21B forms a cylindrical shape. A handle insertion portion 20 is formed. As a material for forming the base sheet 21, a fiber sheet such as a nonwoven fabric used in conventional cleaning articles can be used.

The basis weight of the base sheet 21 is preferably 8 g/m ² or more, more preferably 15 g/m ² or more, and even more preferably 20 g/m ² or more, from the viewpoint of strength and the like. It is also preferably 200 g/m ² or less, more preferably 150 g/m ² or less, and even more preferably 120 g/m ² or less. Specifically, the basis weight of the base sheet 21 is preferably 20 g/m ² or more and 120 g/m ² or less, more preferably 25 g/m ² or more and 100 g/m ² or less, and more preferably 30 g/m 2 or more. It is more preferably ² or more and 90 g/m ² or less.

As shown in FIG. 1, the cleaning part 10 is a columnar member made of a plurality of fibers. Although FIG. 1 shows the cleaning unit 10 having a substantially cylindrical shape, the shape of the cleaning unit 10 is not limited to this, and may be, for example, a substantially cylindric shape. The cleaning part 10 shown in the figure is composed of first fibers 11 and second fibers 12 having a smaller diameter than the first fibers 11 .

The cleaning part 10 has a columnar shape by opening the first fibers 11 and the second fibers 12 . The first fibers 11 and the second fibers 12 before opening are arranged as shown in FIG. As shown in FIG. 2, among the surfaces of each base sheet 21, the surface opposite to the surface facing the handle insertion portion 20 (in the figure, the upper surface of the first base sheet 21A and the surface of the second base sheet 21B) The lower surface) includes a fiber bundle 11A of the first fibers 11 (hereinafter also referred to as "first fiber bundle 11A") and a fiber bundle 12A of the second fibers 12 (hereinafter referred to as "second fiber bundle 12A"). ) are arranged with a predetermined thickness. The fiber opening will be described in detail in the manufacturing method described later.

As shown in FIG. 2, the cleaning unit 10 has four fiber layers laminated in the order of the second fiber bundle 12A and the first fiber bundle 11A outward from the base sheets 21A and 21B. After arranging, each fiber is opened to form a columnar shape. The cleaning part 10 before opening is arranged so that the first fiber bundle 11A forms an outer layer and the second fiber bundle 12A forms an inner layer on both sides thereof. Also, the fibers 11 and 12 forming the fiber bundles 11A and 12A are aligned so as to extend in the width direction Y, which is the direction perpendicular to the longitudinal direction X. As shown in FIG. Thus, the cleaning section 10 is formed by arranging the fiber bundles 11A and 12A on the base sheets 21A and 21B.

As shown in FIG. 2, the cleaning section 10 has a joint section 13 continuously extending along the direction in which the handle insertion section 20 extends, in the central region in the direction in which the fiber bundles 11A and 12A extend. The joining portion 13 is formed so as to continuously join the first and second fiber bundles 11A and 12A and the base sheet 21 in the central region in the width direction Y thereof. The joint portion 13 is formed so as to overlap the handle insertion portion in the planar direction of the base sheet 21 .

Focusing on the first and second fiber bundles 11A and 12A, the first fibers 11 forming the first fiber bundle 11A and the second fibers 12 forming the second fiber bundle 12A have one fiber end at a joint portion. All 13 positions are fixed ends. That is, one end of each fiber 11 and 12 is fixed by the joint 13 . On the other hand, the other ends of the fibers 11 and 12 are free ends because they are not joined. With such a configuration, each fiber can move freely during cleaning, so that even when cleaning a curved or uneven surface, the cleaning article 1 can easily follow the surface to be cleaned. As a result, it is possible to improve the collection of dust.

As shown in FIG. 3, when the cleaning part 10 is viewed in cross section, the first fibers 11 and the second fibers 12 constituting the cleaning part 10 are both radially extending from the joining part 13 located in the central part in the width direction. extended. Also, as shown in the figure, the first fibers 11 have a tendency to stand up against the surface of the base sheet 21, so that the first fiber bundles 11A are perpendicular to the surface of the base sheet 21. It is unevenly distributed toward the direction. On the other hand, as shown in the figure, the second fibers 12 have a lodging tendency along the surface of the base sheet 21, whereby the second fiber bundles 12A are unevenly distributed near the surface of the base sheet 21. ing.

The term “standing tendency” means that when a fiber bundle having a basis weight of 80 g/m ² or more is observed, 30% (by mass) or more of the fiber bundle forms an angle of 45 degrees or more with respect to the surface of the base sheet 21. It means that the fibers are oriented like this. In addition, the “lodging tendency” means that when a fiber bundle having a basis weight of 80 g/m ² or more is observed, 40% (by mass) or more of the fiber bundle is less than 45 degrees with respect to the surface of the base sheet 21. It means that the fibers are oriented so as to form

To explain the details of the cleaning unit 10, as shown in FIG. Large-diameter first fibers 11 are mainly present. The presence of the second fibers 12 in the first region 31 is not impeded, but the amount of the second fibers 12 present is preferably small from the viewpoint of the ability to collect cotton dust. On the other hand, relatively small-diameter second fibers 12 are mainly present in a region preferably forming an angle of less than 45 degrees with respect to the surface of the base material sheet 21 (hereinafter also referred to as “second region 32”). is doing. Although the presence of the first fibers 11 in this region is not impeded, it is preferable that the amount of the first fibers 11 present is small from the viewpoint of collecting fine particles.

Since the positions of the first fibers 11 and the second fibers 12 are configured as described above, in the first region 31 where the relatively large first fibers 11 mainly exist, the first fibers 11 11 entangles and collects clumps of cotton dust in a stabbing manner. On the other hand, in the second region 32 where the relatively small diameter second fibers 12 mainly exist, the fine particles are adsorbed to the fibers and effectively collected. In contrast to this, when the first fibers 11 and the second fibers 12 are uniformly mixed in the entire cleaning part 10, it is difficult to collect lint and fine particles at the same time. be. Note that the first region 31 and the second region 32 do not need to be clearly distinguished, and a transition region between the two may exist between them.

The ratio of the mass of the first fiber bundle 11A to the mass of the second fiber bundle 12A is preferably 30:70 or more and 70:30 or less, and 40:60 as the first fiber bundle 11A:the second fiber bundle 12A. It is more preferably 60:40 or less, and even more preferably 45:55 or more and 55:45 or less. By setting the mass ratio of the first fiber bundle to the second fiber bundle within such a range, it is possible to efficiently capture fine particles, fine cotton dust, and large flexible dust such as clumps of fiber dust. can collect.

From the viewpoint of further improving the ability to pierce and collect flexible dust such as clumped cotton dust, the fibers forming the first fibers 11 have a higher elastic modulus than the fibers forming the second fibers 12. is preferably high. Fibers having a high elastic modulus include, for example, fibers containing a thermoplastic resin as a raw material. Examples of fibers containing a thermoplastic resin include PE (polyethylene), PP (polypropylene), PET (polyethylene terephthalate) fibers, PE and PET conjugate fibers, PE and PP conjugate fibers, PET or PP core and sheath. is PE, and the like has a core-sheath structure. The modulus of elasticity can be, for example, the initial tensile resistance (apparent Young's modulus) shown in the Japan Chemical Fibers Association's "Performance Table of Japanese Chemical Fibers".

In order to make the first fibers 11 have a higher elastic modulus than the second fibers 12, for example, a material having a higher elastic modulus than that of the second fibers 12 is used as the raw material of the first fibers 11, or The fineness of the first fibers 11 can be made higher than the fineness of the second fibers 12 when the same raw materials are used. That is, when the same raw material is used for each fiber, by making the diameter of the second fiber 12 smaller than that of the first fiber 11, each fiber can have a different elastic modulus.

From the viewpoint of effectively entangling and removing flexible dust such as clumped cotton dust, when the fibers of the first fibers 11 and the fibers of the second fibers 12 are the same raw material, the second fibers 12 is smaller in diameter than the first fibers 11, the ratio of the fineness of the first fibers 11 to the fineness of the second fibers 12 is 1.2 or more when the fineness of each fiber is expressed in dtex. is preferably 1.5 or more, more preferably 2 or more, preferably 10 or less, more preferably 8 or less, and 5 or less is more preferred. Specifically, the ratio of the fineness of the first fibers to the fineness of the second fibers is preferably 1.2 or more and 10 or less, more preferably 1.5 or more and 8 or less, and 2 or more and 5 or less. is more preferred.

From the same point of view, the fineness of the first fibers 11 is preferably 4.4 dtex or more, and preferably 6.6 dtex or more, provided that the fineness relationship between the first fibers 11 and the second fibers 12 described above is satisfied. more preferably 8.8 dtex or more, preferably 50 dtex or less, more preferably 30 dtex or less, and even more preferably 20 dtex or less. Specifically, the fineness of the first fibers 11 is preferably 4.4 dtex or more and 50 dtex or less, more preferably 6.6 dtex or more and 30 dtex or less, and even more preferably 8.8 dtex or more and 20 dtex or less. . When the fineness of the first fibers 11 is within such a range, clumped cotton dust or the like can more easily stick into the first fibers 11 and be removed more easily.

From the same point of view, the fineness of the second fibers 12 is preferably 0.11 dtex or more, preferably 1.1 dtex or more, provided that the fineness relationship between the first fibers 11 and the second fibers 12 described above is satisfied. more preferably 2.2 dtex or more, preferably 11 dtex or less, more preferably 6.6 dtex or less, and even more preferably 3.3 dtex or less. Specifically, the fineness of the second fibers 12 is preferably 0.11 dtex or more and 11 dtex or less, more preferably 1.1 dtex or more and 6.6 dtex or less, and 2.2 dtex or more and 6.6 dtex or less. is more preferred. Fine particles are more easily removed by setting the fineness of the second fibers 12 within this range.

Both the first fibers 11 and the second fibers 12 are preferably crimped from the viewpoint of enhancing removability by entangling flexible dust such as clumps of cotton dust. As the crimped fibers, those crimped two-dimensionally or three-dimensionally can be used. As the crimped fiber, for example, the above-described core-sheath fiber, eccentric core-sheath type conjugate fiber or side-by-side type conjugate fiber containing two types of thermoplastic resins having different shrinkage ratios can be adopted. . Constituents of the crimped fiber include the resins described above. Other examples include those described in JP-A-9-296325.

The degree of crimping of fibers can be evaluated, for example, as the crimp ratio and the number of crimps defined in JIS L 0208. The crimp ratio is defined as the percentage of the difference between the length A when the fiber is stretched and the length B of the original fiber to the length A when the fiber is stretched, "(AB)/ A x 100 (%)". The original length B of the fiber is the length of the fiber in its natural state, which is obtained by connecting both ends of the fiber with a straight line. The natural state refers to a state in which one end of the fiber is fixed to a horizontal plate and hung downward by the weight of the fiber. The length A when the fiber is stretched means the length at the minimum load when the fiber is stretched until the crimp disappears.

From the viewpoint of improving the entanglement of cotton dust, the crimp rate of each of the fibers 11 and 12 is preferably 5% or more and 50% or less, and preferably 10% or more and 30% or less. More preferred. Moreover, the number of crimps is preferably 2 or more and 10 or less per 1 cm independently. Such a crimp rate and number of crimps can be obtained by, for example, appropriately adjusting the temperature of the crimping treatment or heat treatment performed in the manufacturing process of the fiber.

Thermoplastic fibers are preferably used as the constituent materials of the first fibers 11 and the second fibers 12 . As thermoplastic fibers, for example, one or more selected from polyesters such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), and polyamides can be used. These fibers can be used singly or in combination of two or more.

From the viewpoint of making it easier to visually recognize the collected dust, it is preferable that the color of the first fibers 11 and the color of the second fibers 12 in the cleaning part 10 are different. In order to make the colors of the fibers 11 and 12 different, for example, in the manufacturing process of each fiber, coloring agents having different colors are added, or the content of the same coloring agent is changed. be able to. Moreover, by having such a configuration, there is an advantage that a color contrast is generated between the first region 31 and the second region 32, and the design of the cleaning article 1 is enhanced.

The basis weights of the first fiber bundle 11A and the second fiber bundle 12A are each independently set to 50 g/m from the viewpoint of enhancing the ability to collect cotton dust in the first region 31 and the ability to collect fine particles in the second region. ² or more, more preferably 80 g/m ² or more, even more preferably 100 g/m ² or more, and preferably 600 g/m ² or less, and 500 g/m ² or less. more preferably 300 g/m ² or less. Specifically, the basis weights of the first fiber bundle 11A and the second fiber bundle 12A are each independently preferably 50 g/m ² or more and 600 g/m ² or less, and 80 g/m ² or more and 500 g/m 2 or more. It is more preferably ² or less, and even more preferably 100 g/m ² or more and 300 g/m ² or less.

From the viewpoint of more effectively improving the ability to collect cotton dust in addition to the ability to collect fine particles, as shown in FIG. In addition to the second region 32, a mixed region 33 composed of mixed fiber bundles 17 in which the first fibers 11 and the second fibers 12 are mixed is unevenly distributed between the fiber bundles 12A of the second fibers 12 and the base sheet 21. preferably. The mixed fiber bundle 17 is unevenly distributed closer to the surface of the base material sheet 21 than the second fiber bundle 12A, and the fibers 11 and 12 forming the mixed fiber bundle 17 both have lodging tendency. The mixed region 33 composed of the mixed fiber bundle 17 is a region where the first fibers 11 and the second fibers 12 are substantially uniformly present, and the region 33 is preferably 30 degrees or less with respect to the surface of the base sheet 21. , more preferably 25 degrees or less.

The cleaning unit 10 partially including the mixed fiber bundle 17 shown in FIG. 4 includes, for example, as shown in FIG. 21 can be formed by forming a series of dotted joints 15 . The dot-like joint row 15 is located on the side of the joint 13 at a predetermined distance in the width direction Y, and extends in the same direction as the joint 13 extends. In other words, a pair of dotted joint rows 15 are formed so as to sandwich the joint 13 . The row of dotted joints 15 is composed of a plurality of dotted joints 15A which are discontinuous and separated from each other.

As shown in FIG. 5(b), the first fibers 11 and the second fibers 12 arranged on the base material sheet 21 have dotted joint rows between the free ends and the fixed ends of these fibers. At 15, a portion to be further joined with the base sheet 21 is produced. As shown in the figure, the second fibers 12 are joined to the base sheet 21 and the first fibers 11 are joined to the second fibers 12 at the dotted joints 15A of the dotted joint row 15 . Further, each fiber of the first fiber 11 and the second fiber 12 is joined to be integrated with the base sheet 21 between the free end and the fixed end of each fiber. In addition to this, the base sheets 21A and 21B are joined at the dotted joints 15A of the dotted joint row 15. As shown in FIG. On the other hand, as shown in FIG. 5C, in the portion where the point-like joints 15A are not formed, both the first fibers 11 and the second fibers 12 arranged on the base sheet 21 are made of fiber. It has a free end and a joint portion 13 as a fixed end of the fiber, and the fibers 11 and 12 and one base sheet 21 are joined at the joint portion 13 .

When the dot-like joint row 15 is formed in this way, the cross-sectional view of the cleaning part 10 along the cross section (line BB in FIG. 5A) having the dot-like joint 15A is shown in FIG. , there is a region in which mixed fiber bundles 17 are formed. On the other hand, each fiber is oriented as shown in FIG. 3 in the section (CC line in FIG. 5A) at the portion where the point-like joint is not formed. In this way, there are a plurality of bonding positions between the fibers and the base sheet, and the bonding patterns are different, so that the cleaning portion 10 having a plurality of patterns of raised shapes is formed, and as a result, fine particles and cotton It is possible to further effectively improve the dust collecting performance.

The shape of the dot-like joints 15A in the dot-like joint row 15 is not particularly limited as long as the effect of the present invention is exhibited, and may be, for example, a geometric shape such as a circle, an ellipse, or a rectangle. Also, the intervals in the longitudinal direction X of the dot joints 15A may be equal or may not be equal.

From the viewpoint of easy insertion of the handle 30, it is preferable that the distance L1 (see FIG. 5) between the dotted joints 15A in the dotted joint row 15 in the longitudinal direction X is 5 mm or more and 40 mm or less. The number of dot-like joints 15A can be appropriately adjusted depending on the length of the base sheet 21 in the longitudinal direction X, but is preferably 2 or more and 100 or less.

From a similar point of view, the spacing W1 (see FIG. 5) in the width direction Y between the joints 13 and the row of dotted joints 15 can be adjusted as appropriate depending on the length of the base sheet 21 in the width direction. Independently, it is preferably 5 mm or more and 90 mm or less, and more preferably 5 mm or more and 45 mm or less.

From the same point of view, the interval W2 (see FIG. 5) between the adjacent dotted joint rows 15, 15 can be appropriately adjusted depending on the length of the base sheet 21 in the width direction. 10 mm or more and 90 mm or less is more preferable. Since the base sheets 21A and 21B are joined by the dotted joint rows 15 and 15, the interval W2 is the width of the handle insertion portion 20. As shown in FIG.

The shape of the handle 30 is not particularly limited as long as it has a grip portion 35 that can be manually gripped and an insertion portion (not shown) having a shape that can be inserted into the grip insertion portion 20 . The insertion portion of the handle 30 may be, for example, a bifurcated member as disclosed in Japanese Patent Application Laid-Open No. 2007-236690. Alternatively, it may be a columnar member.

Regardless of the shape of the insertion portion, from the viewpoint of preventing the cleaning article 1 from unintentionally falling off the handle 30, the handle 30 is engaged with the notch 23 formed in the base sheet 21. A mating barb (not shown) is preferably provided. Also, from the same point of view, it is preferable that the width of the insertion portion of the handle 30 is approximately the same length as the width of the handle insertion portion 20 .

As the material for forming the handle 30, it is preferable to use a thermoplastic resin from the viewpoint of moldability and flexibility. Specific examples of thermoplastic resins include polyethylene, polypropylene, polyvinyl chloride, polystyrene, ABS resin, and acrylic resin. Since the handle 30 is made of a flexible material, the cleaning article 1 can easily follow the surface to be cleaned when the surface to be cleaned has a curved surface or unevenness, and the dust removal efficiency is improved. There is also the advantage of increasing

The cleaning article of the present invention has been described above, and a preferred method for manufacturing the cleaning article of the present invention will be described below. A method for manufacturing a cleaning article includes steps of manufacturing first fibers and second fibers to form a raw fabric fiber bundle of each fiber, and forming a first fiber bundle on one side of a raw fabric sheet for forming a base sheet. and a step of laminating and joining raw fabric fiber bundles of the second fiber to form a joined raw fabric body; a step of joining a pair of joined raw fabric bodies to form a multi-layer joined raw fabric body; and a step of cutting and opening the bonded raw fabric.

First, a first fiber and a second fiber are produced to form a raw fiber bundle of each fiber (raw fiber bundle forming step). A known method can be adopted as a method for producing a raw fiber bundle of each fiber. For example, a molten raw material resin is discharged from a nozzle to form a long fiber resin, and the long fiber resin has a predetermined fineness. After applying a drawing treatment etc. so that it becomes a can be manufactured.

From the viewpoint of manufacturing efficiency, it is preferable that the longitudinal direction of each raw fiber bundle coincides with the conveying direction, and the width of each raw fiber bundle is substantially the same width as the intended cleaning article. It is preferable to keep

In the case of crimping each fiber, for example, the stretched long fibrous resin is further crimped, the resin is cut into short fibers, and the short fibers are heat-treated. can be done by The temperature at which the fibers are crimped can be appropriately adjusted according to the melting point of the raw material resin.

Next, the original fiber bundles of the first fibers 11 and the second fibers 12 are laminated on one surface of the original sheet for forming the base material sheet 21 (hereinafter also referred to simply as the "original sheet"). Joining to form a raw fabric joined body (raw fabric joined body forming step). Each raw fiber bundle of the first fibers 11 and the second fibers 12 manufactured through the above steps is laminated on one surface of a raw fabric sheet for forming the base sheet 21 . At this time, the original fiber bundle of the second fibers 12 is preferably laminated so as to be arranged between the original sheet and the original fiber bundle of the first fibers 11 . That is, when the raw fabric sheet is used as the lower layer (inner layer), it is preferable to laminate the raw fabric sheet, the raw fabric fiber bundle of the second fibers 12, and the raw fabric fiber bundle of the first fibers 11 in this order.

From the viewpoint of manufacturing efficiency, it is preferable that the longitudinal direction of the raw fabric sheet, the longitudinal direction of each raw fabric fiber bundle, and the conveying direction are the same. Moreover, it is preferable that the width of the original sheet is substantially the same as that of the intended cleaning article. In this step, it is preferable that the longitudinal direction of the joined body of original fabrics coincides with the conveying direction of the joined body.

In the transporting process of the laminate manufactured in this way, joint portions 13 are formed and joined in a direction substantially orthogonal to the original sheet at regular intervals along the transport direction of the laminate. The joining portion 13 is formed so as to join the original fabric sheet, the original fabric fiber bundle of the second fibers 12 and the original fabric fiber bundle of the first fibers 11, respectively. The joint 13 can be formed by, for example, ultrasonic sealing, heat sealing, or the like. In this manner, a raw fabric joined body can be formed.

Subsequently, a pair of joined original fabrics are joined to form a multi-layer joined original fabric (step of forming a multi-layer joined original fabric). The joined raw fabric sheets manufactured in the joined raw fabric forming step are overlapped so that the raw fabric sheets face each other. In this state, the raw fabric sheets are joined together to form a multi-layer joined body of raw fabrics. The multi-layered raw fabric joined body includes, from one side, a raw fabric fiber bundle of the first fibers 11, a raw fabric fiber bundle of the second fibers 12, a raw fabric sheet, a raw fabric sheet, and a raw fabric fiber of the second fibers 12. The raw fabric bundle of the first fibers 11 is positioned on the outermost side (outer layer), and the raw fabric sheet is positioned on the innermost side (inner layer). is formed as In addition, in this step, it is preferable that the longitudinal direction of the multi-layer bonded article and the conveying direction are the same.

The method of joining the raw fabric sheets in a pair of raw fabric joined bodies is, for example, after applying or spraying a hot-melt adhesive or the like to the surface of each fiber on the side where the raw fabric fiber bundle is not joined in the raw fabric joined body. , can be joined by laminating each raw sheet. The above adhesive is preferably applied or sprayed on a position where the handle insertion portion can be formed.

Further, instead of the above-described joining method, a pair of joined bodies of original fabrics can be joined by forming a plurality of rows of dotted joining portions 15 as shown in FIG. Specifically, after laminating the original fabric sheets so that the original fabric sheets face each other, the original fabric fiber bundles of the first fibers 11 on one side are joined to the original fabric fiber bundles of the first fibers 11 on the other side. Then, a plurality of point joints 15A are formed in the width direction of the original sheet. The dot-like joints 15A thus formed form a series of dot-like joints 15 extending in the same direction as the above-described extending direction of the joints 13 . The row of punctate joints 15 can be formed, for example, by ultrasonic sealing.

Finally, the joined multi-layer raw fabric is cut at the positions of the adjacent joining portions 13 . Subsequently, the raw fiber bundle is opened to form a columnar cleaning portion to obtain a cleaning article (opening step). Specifically, after cutting a multi-layered raw fabric joined body into the size of the intended cleaning article, air is blown to the first fiber 11 and the second fiber 12 to fluff each fiber bundle. to make a cleaning article having a columnar cleaning portion 10 and a cylindrical handle insertion portion 20 . By opening the fibers in this manner, the flexibility of the cleaning part 10 is enhanced, and the ability to follow the object to be cleaned is enhanced, and as a result, the ability to collect dust can be improved.

From the viewpoint of manufacturing efficiency, it is preferable to cut the multi-layered raw fabric joined body at the positions of the joints 13 adjacent to each other along the width direction of the raw fabric sheets. It is also preferable to cut at positions that are in the longitudinal direction of the article. By cutting at such a portion, the first fibers 11 and the second fibers 12 in the cleaning portion 10 have the joint portion 13 as a fixed end and the cut portion as a free end.

The original fabric sheets, the original fabric bundles of the second fibers 12, and the original fabric bundles of the first fibers 11, which form the multi-layered joined body, are cut to have predetermined dimensions, and are shown in FIG. 2, the second fiber bundle 12A and the first fiber bundle 11A are obtained. That is, the original sheet, the original fiber bundle of the second fibers 12, and the original fiber bundle of the first fibers 11 are substantially the same as the base sheet 21, the second fiber bundle 12A, and the first fiber bundle 11A, respectively. It is.

When the handle inserting portion 20 is provided with an extending portion, for example, a multi-layered raw fabric joined body in which the width of the raw fabric sheet is wider than the width of the fiber raw fabric bundle to be laminated is formed, and the width direction of the raw fabric sheet is formed. The extending portion can be formed by cutting the cleaning article at a position where the ends are in the longitudinal direction of the cleaning article. The extending portion thus formed may be further processed to have a desired shape by performing a cutting process or the like. As another method, as shown in FIG. 5(a), a pair of rupture guide lines 19 are formed on the base sheet 21, and the area sandwiched between the rupture guide lines 19 is left. The extension can be formed by cutting away the outwardly located area. From the viewpoint of facilitating the insertion of a handle by gripping the extending portion, the width of the extending portion is preferably wider than the interval W2 between the adjacent dotted joint rows 15, 15. Narrower than the maximum width is preferred.

When the folded portion is provided in the handle insertion portion 20, for example, the multi-layered raw fabric joined body is cut so as to provide the above-described extended portion, and then each base sheet having the extended portion formed thereon is cut. A folded portion can be formed by folding the ends of 21A and 21B toward the central portion in the longitudinal direction X and joining the facing surfaces of the sheet 21 to each other. From the viewpoint of flexibility, only the ends of the base sheet 21 are joined to the facing surfaces of the folded base sheet 21 so that a space defined by the facing surfaces of the folded base sheet 21 is formed in the folded portion. It is preferable that the opposing surfaces of the base sheet 21 are partially joined together. From the viewpoint of flexibility, it is preferable that the entire facing surfaces of the folded portion are not joined in close contact with each other.

The cleaning article of the present invention is manufactured through the above steps. The cleaning article 1 manufactured in this way can be attached to a cleaning tool having a handle 30 or a member having stretchability, and can be applied to floor surfaces, walls, buildings such as beams, window bars, doors, etc. Fittings such as doorknobs, furniture such as cupboards, chests of drawers, desks and dining tables, and the like can be suitably used as objects to be cleaned.

As described above, the cleaning article of the present invention has a cleaning portion made up of a plurality of fibers, and the cleaning portion has high followability to the surface to be cleaned. Flexible dust such as clumped lint can also be effectively collected. In particular, it can be suitably used to remove clumps of cotton dust accumulated in the corners of a room, the back side of furniture, and the like.

The cleaning article of the present invention is not limited to the above embodiments. For example, although the cleaning part 10 has been described as being composed of fibers having two different thicknesses, the first fibers 11 and the second fibers 12, the types of fibers are not limited to these, as long as the effects of the present invention can be achieved. , the cleaning portion may be formed using fibers having three or more types of thickness.

In relation to the above-described embodiments of the present invention, the following cleaning articles are further disclosed.

<1>
A cleaning article comprising a columnar cleaning part made of a plurality of fibers and a tubular handle insertion part positioned inside the cleaning part and extending along the direction in which the cleaning part extends,
The handle insertion portion is formed by joining a pair of opposing base sheets,
A fiber bundle of first fibers and a fiber bundle of second fibers having a diameter smaller than that of the first fibers are arranged on the surface of each of the base sheets opposite to the surface facing the handle insertion portion. A cleaning part is formed,
both the first fiber and the second fiber have a free end and a fixed end;
Both the fixed end of the first fiber and the fixed end of the second fiber overlap the handle insertion portion in the planar direction of the base sheet, and extend along the direction in which the handle insertion portion extends. It is joined with the base material sheet,
In a cross-sectional view of the cleaning portion, both the first fibers and the second fibers radially extend from the joint portion,
In a cross-sectional view of the cleaning part, the first fibers have a tendency to stand up against the surface of the base sheet, whereby the fiber bundles of the first fibers are perpendicular to the surface of the base sheet. It is unevenly distributed toward the direction,
In a cross-sectional view of the cleaning part, the second fibers have a lodging tendency along the surface of the base sheet, whereby the fiber bundles of the second fibers are unevenly distributed near the surface of the base sheet. , cleaning supplies.

<2>
The cleaning article according to <1> above, wherein the ratio of the fineness of the first fibers to the fineness of the second fibers is 2 or more and 5 or less.
<3>
The fineness of the first fiber is preferably 4.4 dtex or more, more preferably 6.6 dtex or more, and even more preferably 8.8 dtex or more, according to <1> or <2> above. cleaning supplies.
<4>
The fineness of the first fibers is preferably 50 dtex or less, more preferably 30 dtex or less, and even more preferably 20 dtex or less, for cleaning according to any one of <1> to <3>. Goods.
<5>
The fineness of the second fiber is preferably 0.11 dtex or more, more preferably 1.1 dtex or more, and still more preferably 2.2 dtex or more, any of the above <1> to <4> The cleaning article described in 1.
<6>
The fineness of the second fiber is preferably 11 dtex or less, more preferably 6.6 dtex or less, and still more preferably 3.3 dtex or less, according to any one of <1> to <5> Cleaning items as described.

<7>
The cleaning article according to any one of <1> to <6>, wherein the color of the first fibers and the color of the second fibers are different.
<8>
The cleaning article according to any one of <1> to <7>, wherein the fibers forming the first fibers have a higher elastic modulus than the fibers forming the second fibers.
<9>
In a row of point-like joints in which the point-like joints are located at a distance from the joint and extend in the same direction as the direction in which the joint extends,
second fibers are joined to the base sheet between the free end and the fixed end;
The cleaning article according to any one of <1> to <8>, wherein the first fibers are bonded to the second fibers.
<10>
The cleaning article according to <9>, wherein the shape of the point joint is circular or elliptical.

<11>
The above <9> or <10>, wherein mixed fiber bundles in which the first fibers and the second fibers are mixed are unevenly distributed between the fiber bundles of the second fibers and the base sheet. cleaning supplies.
<12>
The cleaning article according to any one of <1> to <11>, wherein both the first fibers and the second fibers are crimped.
<13>
The cleaning article according to any one of <1> to <12>, wherein the base sheet has a substantially rectangular shape.
<14>
The cleaning article according to any one of <1> to <13>, wherein the longitudinal length of the base sheet is longer than the cleaning part.
<15>
The cleaning article according to any one of <1> to <14>, wherein the width of the base sheet is substantially the same as the width of the cleaning portion.
<16>
The cleaning article according to any one of <1> to <14>, wherein the width of the base sheet is narrower than the width of the cleaning portion.

<17>
<1> to <16>, wherein the handle insertion portion has an extension portion in which a longitudinal end portion of the base sheet extends from at least one longitudinal end portion of the cleaning portion. Cleaning article according to any one of.
<18>
The cleaning article according to <17>, wherein the extending portion has a width narrower than the width of the base sheet located in the area where the cleaning portion exists.
<19>
In a pair of point-like joint rows in which the point-like joints are located at a distance from the joint and extend in the same direction as the direction in which the joint extends,
second fibers are joined to the base sheet between the free end and the fixed end;
the first fiber is joined to the second fiber,
The cleaning article according to <17> or <18>, wherein the width of the extending portion is wider than the interval between the adjacent dotted joint rows.
<20>
The cleaning article according to any one of <17> to <19>, wherein the width of the extending portion is narrower than the maximum width of the base sheet.
<21>
The cleaning article according to any one of <17> to <20>, wherein the extending portion has rounded corners at the most extending end.

<22>
The cleaning article according to any one of <17> to <21>, wherein the extending portion formed on one base sheet is not joined to the other base sheet.
<23>
The cleaning article according to any one of <1> to <22>, wherein the joint portion is formed continuously.
<24>
<1>, wherein the joining portion is formed so as to continuously join the fiber bundles of the first fibers and the second fibers and the base sheet at a center region thereof in the width direction; The cleaning article according to any one of <23>.
<25>
The ratio of the mass of the fiber bundle of the first fibers to the mass of the fiber bundle of the second fibers is 30:70 or more and 70:30 or less as the fiber bundle of the first fibers: the fiber bundle of the second fibers. The cleaning article according to any one of <1> to <24>.

EXAMPLES The present invention will be described in more detail below with reference to examples. However, the scope of the invention is not limited to such examples.

[Example 1]
A cleaning article shown in FIG. 1 was produced using the first and second fibers shown below. Specifically, as the first fiber bundle, a tow (basis weight 230 g / m ² ), and the core material contained 0.12% by mass of Solvent Red 207, a pigment, as a coloring agent. As the second fiber bundle, a tow (basis weight: 230 g/m ² ) of core-sheath fibers (core material: made of PET, sheath material: made of PE, core material: sheath material = 50:50) with a fineness of 2.2 dtex. , and the core material contained 0.35% by mass of the colorant described above. The first fibers and the second fibers were each coated with 5% by mass of liquid paraffin as a dust collecting agent. The base sheet was a thermal bonded nonwoven fabric (basis weight: 30 g/m ² ) of composite fibers of PE and PET.

Two sets of the substrate sheet, the fiber bundle of the second fiber described above, and the fiber bundle of the first fiber described above are laminated in this order, and these are joined so that the substrate sheets face each other. The cleaning article of Example 1 was made. That is, as shown in FIG. 2, the cleaning article of this embodiment is manufactured by arranging the fiber bundle of the first fibers in the outer layer and the fiber bundle of the second fibers in the inner layer, and then opening the fibers. is.

[Example 2]
A cleaning article was produced in the same manner as in Example 1, except that a core-sheath fiber tow (basis weight: 230 g/m ² ) with a fineness of 8.8 dtex was used as the first fiber bundle.

[Example 3]
A cleaning article was produced in the same manner as in Example 1, except that a tow of core-sheath fibers with a fineness of 11 dtex (basis weight: 230 g/m ² ) was used as the first fiber bundle.

[Example 4]
A tow of core-sheath fibers with a fineness of 6.6 dtex (basis weight of 230 g/m 2 ) is used as the first fiber bundle, and a tow of core-sheath fibers with a fineness of 3.3 dtex (basis weight of 230 g/m ² ) is used as the second fiber bundle. m ² ) was used to produce cleaning articles in the same manner as in Example 1.

[Example 5]
A cleaning article was produced in the same manner as in Example 4, except that a core-sheath fiber tow (basis weight: 230 g/m ² ) with a fineness of 8.8 dtex was used as the first fiber bundle.

[Example 6]
A cleaning article was produced in the same manner as in Example 4, except that a tow of core-sheath fibers with a fineness of 11 dtex (basis weight: 230 g/m ² ) was used as the first fiber bundle.

[Comparative Example 1]
Cleaning article in the same manner as in Example 1, except that two layers of fiber bundles with a basis weight of 230 g/m ² made of core-sheath fibers of which both the first and second fibers have a fineness of 3.3 dtex were used on each surface. manufactured. The cleaning article of this comparative example consisted only of fiber bundles of the same fibers on each side.

[Comparative Example 2]
Two sets of each fiber bundle of the first fiber and the second fiber used in Example 1 were laminated in the order of the base sheet, the fiber bundle of the first fiber, and the fiber bundle of the second fiber. The cleaning article of Comparative Example 2 was produced by joining the material sheets so that they faced each other. The cleaning article of this comparative example was manufactured by arranging the fiber bundle of the first fibers in the inner layer and the fiber bundle of the second fibers in the outer layer, and then opening the fibers.

[Comparative Example 3]
A cleaning article was produced in the same manner as in Comparative Example 2, except that a core-sheath fiber tow (basis weight: 230 g/m ² ) with a fineness of 8.8 dtex was used as the first fiber bundle.

[Comparative Example 4]
A cleaning article was produced in the same manner as in Comparative Example 2, except that a tow of core-sheath fibers with a fineness of 11 dtex (basis weight: 230 g/m ² ) was used as the first fiber bundle.

[Comparative Example 5]
A tow of core-sheath fibers with a fineness of 6.6 dtex (basis weight of 230 g/m 2 ) is used as the first fiber bundle, and a tow of core-sheath fibers with a fineness of 3.3 dtex (basis weight of 230 g/m ² ) is used as the second fiber bundle. m ² ) was used, and a cleaning article was produced in the same manner as in Comparative Example 2.

[Comparative Example 6]
A cleaning article was produced in the same manner as in Comparative Example 2, except that a core-sheath fiber tow (basis weight: 230 g/m ² ) with a fineness of 8.8 dtex was used as the first fiber bundle.

[Comparative Example 7]
A cleaning article was produced in the same manner as in Comparative Example 2, except that a tow of core-sheath fibers with a fineness of 11 dtex (basis weight: 230 g/m ² ) was used as the first fiber bundle.

[Evaluation of fine particle and fine dust collection performance]
The fine particle and fine dust collection performance was evaluated as follows. Specifically, in a polyethylene bag (manufactured by Japan Unipack L-4, dimensions 480 x 340 mm), 8 types of test powder (model fine particle dust) specified by JIS Z 8901 and cotton linter (model cotton dust) 5 g of model dust mixed with 50% by mass of The cleaning article of the example or comparative example is put into the bag containing the model dust, air is introduced into the bag, and the bag is sealed in an inflated state. The bag was supported and held with both hands while maintaining a sealed state, and was randomly shaken 50 times with a stroke of about 50 cm so that model dust was sprinkled over the entire cleaning article. After that, the cleaning item taken out of the bag is defined as the "cleaning item after input", and the mass change (g) of the cleaning item is measured from this mass and the mass of the cleaning item before use (before input). Then, the fine particle and fine dust collection rate (%) of each example or comparative example was calculated from the following formula. The dust collection rate was independently calculated twice, and the average value is shown in Table 1 below as the result.

Change in mass of cleaning article (g) = [mass of cleaning article after input (g)] - [mass of cleaning article before input (g)]
Fine particle and fine dust collection rate (%) = [mass change (g) of cleaning article in Example or Comparative Example]/[mass change (g) of cleaning article in Comparative Example 1] x 100

[Evaluation of collection performance of lumpy fiber dust]
Evaluation of collection performance of lumpy fiber dust was performed as follows. After cutting THE BUG SHOP / GLO BUG YARN (long fibers) to about 5 mm, the fibers were manually loosened so that the average mass was 0.015 g and the average diameter was about 10 mm to form a substantially spherical fiber mass. was used as lumpy model fiber dust (or simply called "model dust"). One piece of this model dust was placed in the central area of a decorative board measuring 30 cm×30 cm.

A handle 30 was attached to the cleaning article of Example or Comparative Example, and the cleaning article was placed on the model dust while the evaluator was holding the handle. Thereafter, the decorative plate was wiped by controlling the cleaning pressure to about 2 to 4 N (about 2.5 N on average) and making 5 reciprocating strokes of 15 cm in the horizontal direction for 5 times. If no model fiber dust adheres to the cleaning article, the evaluation is terminated and no further evaluation is performed.

The evaluator held the handle 30 of the cleaning article to which the model dust had adhered, and the cleaning article was shaken 100 times under the condition of a vertical stroke of 15 cm at a stroke of 0.5 seconds per time. The number of times (times) until the drop fell was measured. When the model dust did not drop even after being shaken 100 times, the number of times of evaluation was set to 100. The number of times until the fiber clumps fell was independently measured 10 times, and the average values are shown in Table 1 below. It should be noted that the larger the number of times until the fiber clumps fall, the higher the collection performance of the clumped fiber dust, that is, the higher the fiber dust holding performance.

As shown in Table 1, compared to Comparative Example 1, the cleaning articles of each example were able to collect model dust mixed with fine particles corresponding to dirt and fine cotton dust to the same extent. It turns out. In addition, it can be seen that the cleaning articles of each example can more effectively collect large, flexible dust such as clumps of fiber dust as compared with each comparative example. Therefore, the cleaning article of the present invention is excellent in the ability to collect fine particles such as dirt and fine cotton dust, as well as the ability to collect flexible and relatively large dust such as clumps of fiber dust. It is.

1 Cleaning article 10 Cleaning part 11 First fiber 11A Fiber bundle of first fiber 12 Second fiber 12A Fiber bundle of second fiber 13 Joining part 15 Dot-like joint row 15A Dot-like joint part 17 Mixed fiber bundle 20 Handle insertion Part 21 base sheet X longitudinal direction Y width direction

Claims (7)

A cleaning article comprising a columnar cleaning part made of a plurality of fibers and a tubular handle insertion part positioned inside the cleaning part and extending along the direction in which the cleaning part extends,
The handle insertion portion is formed by joining a pair of opposing base sheets,
A fiber bundle of first fibers and a fiber bundle of second fibers having a diameter smaller than that of the first fibers are arranged on the surface of each of the base sheets opposite to the surface facing the handle insertion portion. A cleaning part is formed,
both the first fiber and the second fiber have a free end and a fixed end;
Both the fixed end of the first fiber and the fixed end of the second fiber overlap the handle insertion portion in the planar direction of the base sheet, and extend along the direction in which the handle insertion portion extends. It is joined with the base material sheet,
In a cross-sectional view of the cleaning portion, both the first fibers and the second fibers radially extend from the joint portion,
In a transverse cross-sectional view of the cleaning part, the fiber bundle of the first fibers has a tendency to stand up against the surface of the base sheet, whereby the fiber bundle of the first fibers is inclined with respect to the surface of the base sheet. are unevenly distributed in the direction orthogonal to the
In a cross-sectional view of the cleaning part, the fiber bundle of the second fibers has a lodging tendency along the surface of the base sheet, so that the fiber bundle of the second fibers is unevenly distributed near the surface of the base sheet. and
In a cross-sectional view of the cleaning portion, mixed fiber bundles in which the first fibers and the second fibers are mixed are unevenly distributed between the fiber bundles of the second fibers and the base sheet. A cleaning article, wherein both the fiber bundle of the first fibers and the fiber bundle of the second fibers constituting the fiber bundle have a lodging tendency.
The standing tendency means that when a fiber bundle having a basis weight of 80 g/m ² or more is observed, the fibers are oriented such that 30% by mass or more of the fiber bundle forms an angle of 45 degrees or more with respect to the surface of the base sheet. It is what we are doing.
The lodging tendency means that when a fiber bundle having a basis weight of 80 g/m ² or more is observed, the fibers are oriented such that 40% by mass or more of the fiber bundle forms an angle of less than 45 degrees with respect to the surface of the base sheet. It is what we are doing. 2. The cleaning article according to claim 1, wherein the ratio of the fineness of the first fibers to the fineness of the second fibers is 2 or more and 5 or less. 3. A cleaning article according to claim 1 or 2, wherein the color of the first fibers and the color of the second fibers are different. The cleaning article according to any one of claims 1 to 3, wherein the fibers forming the first fibers have a higher modulus of elasticity than the fibers forming the second fibers. In a row of point-like joints in which the point-like joints are located at a distance from the joint and extend in the same direction as the direction in which the joint extends,
second fibers are joined to the base sheet between the free end and the fixed end;
5. A cleaning article according to any preceding claim, wherein the first fibers are bonded with the second fibers. 6. The cleaning article according to any one of claims 1 to 5, wherein the mixed region composed of the mixed fiber bundles is formed so as to exist at an angle of 30 degrees or less with respect to the surface of the base sheet. 7. The cleaning article of any one of claims 1-6, wherein both the first fibers and the second fibers are crimped.

Images