JP4878988B2 - Method for manufacturing cleaning article - Google Patents

Description

  The present invention relates to a cleaning article having a handle insertion portion, which can be attached by inserting the handle into the handle insertion portion, and a method for manufacturing the cleaning article.

2. Description of the Related Art Conventionally, there has been known a cleaning article that has a handle insertion portion and can be attached by inserting the handle into the handle insertion portion.
Moreover, the cleaning article which provided the fiber layer which each consists of a fiber bundle on the upper surface and lower surface of a base material sheet is known. In general, the fiber layer is bonded to the base sheet with a plurality of continuous seal wires (for example, see Patent Document 1 below).

Japanese Patent Laid-Open No. 2002-369883

However, in the conventional cleaning article, the fiber bundle opened state is not necessarily suitable for cleaning.
Moreover, it has been difficult to open the fiber bundle to such an extent that dirt can be efficiently collected.

  Therefore, an object of the present invention is to provide a cleaning article and a fiber bundle, in which fibers can easily enter narrow gaps and have excellent dirt collection properties, and can efficiently clean various objects to be cleaned. An object of the present invention is to provide a method for producing a cleaning article that can be easily opened to such an extent that dirt can be efficiently collected and that can efficiently produce a cleaning article having excellent cleaning performance.

  The present invention has a flat and cylindrical handle insertion portion, and includes fiber layers made of fiber bundles on the upper and lower sides of the handle insertion portion, respectively, and can be attached by inserting the handle into the handle insertion portion. The fiber bundle is a fiber bundle made of crimped fibers bent in a zigzag shape, and the height difference between peaks and valleys alternately existing in the crimped fibers (hereinafter referred to as “crimped”). The above object is achieved by providing a cleaning article having a height difference of 0.1 to 0.7 mm.

  The present invention also includes a step of stacking a belt-like fiber layer composed of continuous fiber bundles and a belt-like sheet member and partially joining the two to form a laminate, and cutting the laminate into a predetermined length. And a manufacturing method of an article for cleaning comprising a step of applying compressed air to the fiber layer portion in the cut laminate to open the fiber bundle, wherein the fiber layer is zigzag-shaped. The present invention provides a method for producing a cleaning article, comprising a bundle of bent crimped fibers, wherein the crimp fibers have a crimp height difference of 0.1 to 0.7 mm.

The cleaning article of the present invention allows fibers to easily enter narrow gaps and is excellent in dirt collection, so that various cleaning objects can be efficiently cleaned.
Further, according to the method for manufacturing a cleaning article of the present invention, the fiber bundle can be easily opened to such an extent that dirt can be efficiently collected, and the cleaning article having excellent cleaning performance is efficiently manufactured. be able to.

Hereinafter, the cleaning article of the present invention will be described based on a first embodiment which is a preferred embodiment thereof with reference to the drawings.
As shown in FIGS. 1 to 4, the cleaning article 10 of the present embodiment is vertically long and has a flat shape as a whole, and includes a pair of flat cylindrical handle insertion portions 15 and 15 in the width direction. Yes. In the cleaning article 10 of the present embodiment, the pair of insertion portions 22 and 22 (see FIG. 6) of the handle 20 can be inserted into the pair of handle insertion portions 15 and 15 and attached.

  The handle insertion portion 15 is formed by joining two members 13A and 13B interposed between the upper and lower fiber layers 11 and 11 so that joint portions 16A and 16B are formed on both sides in the longitudinal direction of the handle insertion portion 15. Is formed. More specifically, as shown in FIG. 4A, the handle insertion portion 15 includes two opposing first handle insertion portion forming sheets 13A and second handle insertion portion forming sheets 13B that are connected to the central continuous seal line 16A. It is formed by joining with a pair of side non-continuous seals 16B.

  One or more fiber layers 11 each comprising a fiber bundle are provided on the upper and lower surfaces of the handle insertion portion 15 in the handle insertion portion forming sheet 13. In the present embodiment, two fiber layers of the first fiber layer 11 </ b> A and the third fiber layer 11 </ b> C are provided on the upper surface of the handle insertion portion 15, and the second fiber layer is provided on the lower surface of the handle insertion portion 15. Two fiber layers 11B and a fourth fiber layer 11D are provided.

  In addition, when performing the description common to 13A of 1st handle insertion part formation sheets and the 2nd handle insertion part formation sheet 13B, the expression of "the handle insertion part formation sheet 13" is used. When the description common to the first fiber layer 11A, the second fiber layer 11B, the third fiber layer 11C, and the fourth fiber layer 11D is given, the expression “fiber layer 11” is used. When the description common to the first fiber layer 11A and the second fiber layer 11B is performed, the expression “inner fiber layer 11P” is used. In the description common to the third fiber layer 11C and the fourth fiber layer 11D, the expression “outer fiber layer 11Q” is used.

  The first fiber layer 11 </ b> A and the second fiber layer 11 </ b> B are fiber layers closest to the handle insertion part forming sheet 13 among the fiber layers 11. The third fiber layer 11C and the fourth fiber layer 11D are fiber layers outside the first fiber layer 11A and the second fiber layer 11B, respectively. Therefore, in the cleaning article 10 of the present embodiment, four layers are laminated in the order of the third fiber layer 11C, the first fiber layer 11A, the second fiber layer 11B, and the fourth fiber layer 11D from the upper layer toward the lower layer. The fiber layer is formed.

  The fiber layer 11 is formed by orienting a fiber bundle with a predetermined thickness. The fiber bundle is substantially oriented in the width direction of the handle insertion portion 15. Therefore, the first fiber layer 11 </ b> A to the fourth fiber layer 11 </ b> D are laminated so that the fiber orientation direction is substantially orthogonal to the longitudinal direction of the handle insertion portion forming sheet 13. Each fiber layer 11 has a substantially rectangular shape in plan view, and is substantially the same shape.

The fiber layer 11 is composed of a fiber bundle made of crimped fibers bent in a zigzag shape, and the crimp height difference of the fibers is 0.1 to 0.7 mm.
When the crimp height difference is 0.1 to 0.7 mm, the fiber bundle is appropriately opened, so that the fibers are suitable for collecting dust, and the gaps between the fibers are contaminated. Becomes easy to be taken in. Further, the fibers are raised and become a three-dimensional shape. Therefore, not only a cleaning object having no gap but also a cleaning object having a narrow gap and an uneven cleaning object can be efficiently cleaned. Furthermore, it is possible to suppress the agglomeration phenomenon caused by the entanglement of fibers, which is likely to occur when cleaning is continued for a while, and the sheet can be used without deterioration in performance until the sheet is sufficiently stained.
Examples of objects to be cleaned having a narrow gap include a blind, a gap between furniture and furniture, a gap between books on a bookshelf and a shelf board, and the like. Examples of the uneven cleaning object include a photograph downlight, a keyboard of a personal computer, and the like.

On the other hand, when the crimp height difference is larger than 0.7 mm, the fibers constituting the fiber bundle are not sufficiently opened, and the fibers suitable for dust collection are not formed. Further, the followability to the uneven shape is also lowered. Even if the fiber is sufficiently opened by mechanical force or the like, aggregation due to entanglement of fibers cannot be suppressed. As a result, the collection performance deteriorates during the cleaning operation.
Further, if the crimp height difference is less than 0.1 mm, a bulky fiber layer cannot be formed. That is, although sufficient fiber opening is possible, the fiber layer made thereby cannot give the appearance three-dimensional effect and sufficient usability.

  From the viewpoint of easy entry of fibers into narrow gaps, ease of formation between fibers suitable for dust collection, and effective prevention of aggregation due to entanglement of fibers after opening, the crimp height difference is 0. From the viewpoint of forming a bulky fiber layer and obtaining a three-dimensional appearance and sufficient usability, the crimp height difference is preferably 0.2 mm or more.

The crimp height difference in the cleaning article is measured as follows.
Observe the fiber layer of the cleaning article and find at least three non-adjacent areas where the crimp is the strongest (high). At each location, find a collection of fibers bent into approximately the same shape, rather than a single fiber, and cut out so that the shape does not collapse.
Fix any one end in the longitudinal direction of the cut fiber with a transparent tape so that the cardboard placed horizontally is not subjected to any load other than its own weight and the fixed cardboard is not distorted (FIG. 7). . When there is a two-dimensional and three-dimensional crimp, the fixing is performed so that the difference between the peak and valley of the fiber becomes the largest. Take a photo with the fibers not coming up from a fixed item such as cardboard and as close to a straight line as possible. At this time, the scale and the like are included in the same photograph so that the actual size can be confirmed.
The obtained photograph is magnified so that the fibers can be clearly seen by an enlargeable device such as a copying machine or a scanner, and preferably magnified by 4 times or more [see FIG.
Then, the crimped portion of the fiber is selected regularly, and a linear portion is selected as much as possible. In addition, the top and bottom are determined based on the direction in which the fiber is less disturbed or the image is clearer. Pay attention to the inside and outside of the fiber assembly and connect the vertices of adjacent valleys (when the valleys are outside, the peaks are from the inside).
Then, as shown in FIG. 8, the distance from the five consecutive peaks to the line connecting the adjacent valleys is measured substantially vertically.
Pay attention to the magnification, etc., measure each of the five peaks and determine the actual size. This average is taken as the measured value for that sample. The remaining portions cut out from the same sample are similarly measured. Of all the samples, three of the large values are averaged to obtain the difference in crimp height of the sample.

  The crimp height difference of the crimped fiber may be different for each portion of the fiber layer of the cleaning article. In the cleaning article of the present invention, the crimp height difference of the fiber bundle measures the portion of the fiber layer that is considered to have the highest degree of crimping. It can be said that the maximum value of the difference in height is specified.

  In addition, the crimped fibers that form the fiber bundle constituting the fiber layer 11 and are bent in a zigzag shape have 2 to 20 crimps per cm (1/2 of the total number of peaks and valleys). Is more preferable, and 2 to 13 is more preferable. The number of crimps per cm is measured according to JIS L 1015 8.12.1 and converted per cm. For example, in the example shown in FIG. 9, since there are a total of 18 peaks and valleys in the range of 1 cm indicated by the arrow, the number of crimps per cm is 9.

  The fiber length of the fiber bundle constituting the fiber layer 11 is preferably 30 to 150 mm, more preferably 50 to 120 mm, from the viewpoint of dust entanglement. The fiber thickness is preferably 0.1 to 200 dtex, particularly 2 to 30 dtex, from the viewpoints of dust entanglement and prevention of scratches on the surface to be cleaned.

  It is also preferable to apply an oil component such as liquid paraffin to the fibers constituting the fiber layer so that particulate matter such as fine dust can be retained. As components other than liquid paraffin, silicone, polyethylene glycol, polyethylene wax and the like, which are generally known as oil agents, can also be used. In addition, it is also effective to add a surfactant to these components in order to improve water absorption and antistatic ability.

  The handle insertion portion forming sheet 13 has a substantially rectangular shape, and the longitudinal direction thereof coincides with the longitudinal direction of the cleaning article 10. The length of the handle insertion portion forming sheet 13 is substantially the same as the length of the fiber layer 11. The width of the handle insertion portion forming sheet 13 is narrower than the width of the fiber layer 11. In other words, in the width direction of the cleaning article 10, the length in the width direction of the member 13 forming the handle insertion portion 15 is shorter than the length in the width direction of the fiber layer 11 made of the fiber bundle.

The handle insertion portion forming sheet 13 has flexibility in the longitudinal direction, and is easy to follow along the surface to be cleaned. Therefore, the fiber layer 11 bonded to the handle insertion portion forming sheet 13 can easily follow along the surface to be cleaned, so that the effect of collecting dust, dust and the like by the cleaning article 10 is enhanced.
As a forming material of the handle insertion portion forming sheet 13, a fiber sheet such as a nonwoven fabric used in a conventional cleaning article can be used. In particular, an air-through nonwoven fabric or a spunbonded nonwoven fabric is preferable. Moreover, a nonwoven fabric, a film, synthetic paper, and those composite materials may be sufficient.

The fiber layer 11 and the handle insertion portion forming sheet 13 are joined along the longitudinal direction of the handle insertion portion forming sheet 13 with their center portions in the width direction being matched.
Specifically, the first fiber layer 11A is joined to the first handle insertion portion forming sheet 13A by a central continuous seal line 16A that extends continuously in the longitudinal direction at the center in the width direction, and the central continuous seal line 16A. Are joined by side non-continuous seals 16B extending discontinuously in the longitudinal direction at positions spaced outward in the width direction. Similarly, the second fiber layer 11B is joined to the second handle insertion portion forming sheet 13B by the center continuous seal line 16A and the side non-continuous seal 16B.
Further, the third fiber layer 11C and the fourth fiber layer 11D are joined to the first handle insertion portion forming sheet 13A and the second handle insertion portion forming sheet 13B, respectively, by the central continuous seal line 16A only at the center in the width direction. Yes.

  In the cleaning article 10 of the present embodiment, the center continuous seal line 16A located in the center in the width direction is a continuous straight line and extends between the longitudinal front and rear ends of the handle insertion portion forming sheet 13. Is formed. The width direction position of the center continuous seal line 16A is also the width direction center portion of the handle insertion portion forming sheet 13.

  The length of at least one of the handle insertion portion forming sheet 13 is preferably 100% or more of the length along the insertion direction of the handle insertion portion 15 for the fiber layer. It is preferable that both the first handle insertion part forming sheet 13A and the second handle insertion part forming sheet 13B are longer than the fiber layer 11 from the viewpoint of easy confirmation of the insertion position of the handle 20, ease of insertion operation, and the like.

Side discontinuous seals 16B and 16B (portions surrounded by broken lines in FIG. 3) are respectively provided outside the center continuous seal line 16A in the width direction.
The side non-continuous seal 16B is composed of an assembly of 2 to 100 point seals 18 spaced in the longitudinal direction. The number of point seals 18 constituting the assembly is more preferably 2 to 50. The point seal 18 of this embodiment is formed from a circular heat seal. The point seals 18 are arranged so that the positions in the longitudinal direction coincide with each other, and are formed at equal intervals in the longitudinal direction. From the viewpoint of preventing the point seal 18 from being caught when the handle 20 is inserted into the handle insertion portion 15, the interval in the longitudinal direction of the point seal 18 is preferably 5 to 40 mm. In addition, the shape of the point seal | sticker 18 may be an ellipse, a rectangle, etc., for example. The intervals in the longitudinal direction of the point seals 18 may not be equal.

The width direction interval W1 between the center continuous seal line 16A and the side non-continuous seal 16B is preferably 5 to 90 mm, more preferably 5 to 45 mm.
The width-direction interval W1 is such that, in the state where the opposing handle insertion portion forming sheets 13A and 13B overlap, the edge on the inner side in the width direction of the point seal 18 forming the side non-continuous seal 16B and the center continuous seal line 16A It is the distance measured along the width direction of the handle insertion part forming sheet 13 between the outer edges in the width direction. In the present embodiment, the width direction interval W <b> 1 is the width of the handle insertion portion 15.

  As shown in FIG. 4A, the inner fiber layer 11P is joined at three locations of the center continuous seal line 16A and the two side non-continuous seals 16B in the longitudinal sectional view along the width direction. As shown in FIG. 4 (b), it is joined at only one location of the central continuous seal line 16A. As shown in FIG. 4A and FIG. 4B, the outer fiber layer 11Q is joined at only one central continuous seal line 16A in any cross section as seen in a longitudinal sectional view along the width direction. In FIGS. 4A and 4B, the second fiber layer 11B and the fourth fiber layer 11D are not shown.

  Moreover, as shown in FIG.4 (c), it is preferable that the width direction edge part of 11 A of fiber layers is extended from the width direction edge part of the handle insertion part formation sheet 13. FIG. The handle insertion portion forming sheet 13 is preferably 1 to 20 mm shorter, more preferably 2 to 15 mm shorter on at least one side than the inner fiber layer 11P in the width direction.

  In the cleaning article 10 of this embodiment, the length in the width direction of the handle insertion portion forming sheet 13 is shorter than the length in the width direction of the fiber bundle forming the fiber layer 11 in the width direction of the cleaning article. Only the fiber layer 11 of the fiber bundle is present on the surface of the cleaning article 10. Furthermore, since there are a plurality of sealing positions of the fiber layer 11 and a plurality of patterns of brushes are formed and the raising directions are different, the fibers easily rise and support each other by air blow or the like. Therefore, as shown in FIG. 5, it is possible to make it the form which covers the perimeter of the cleaning article 10 with the front-end | tip of the brush by a fiber. At this time, it is preferable to cover the entire surface of the cleaning article 10 by raising the fiber layer 11 in a substantially cylindrical shape so as to cover the central continuous seal line 16A.

  The center continuous seal line 16A and the side non-continuous seal 16B are formed by known joining means such as heat sealing and adhesive bonding. When the handle insertion portion forming sheet 13 is made of a heat-fusible material, the center continuous seal line 16A and the side non-continuous seal 16B can be formed by heat fusion.

  A pair of flat cylindrical handle insertion portions 15 and 15 are formed by joining opposite handle insertion portion forming sheets 13A and 13B with three side non-continuous seals 16B, a central continuous seal line 16A, and a side non-continuous seal 16B. Is formed. That is, the three side non-continuous seals 16B, the center continuous seal line 16A, and the side non-continuous seals 16B include a joint seal portion between the handle insertion portion forming sheet 13 and the fiber layer 11, and a handle insert portion forming sheet 13A facing each other. It also serves as a joint seal part between 13B.

  The handle insertion portion 15 is formed over the entire length between the front and rear end portions in the longitudinal direction of the handle insertion portion forming sheet 13. In the handle insertion portions 15 and 15, the handle insertion portion forming sheets 13 </ b> A and 13 </ b> B that are opposed to each other can be in contact with each other when the handle 20 is not inserted, but when the handle 20 is inserted, The insertion portion forming sheets 13A and 13B are separated from each other to form a cylindrical space.

  The handle insertion portion 15 has an insertion port at each of the longitudinal front and rear end portions of the handle insertion portion forming sheet 13. Therefore, the handle 20 can be inserted into the handle insertion portion 15 from any insertion port.

  Next, the handle 20 will be described. As shown in FIG. 6, the handle 20 includes a gripping portion 21 and a pair of insertion portions 22 and 22 that are branched into two forks from the tip of the gripping portion 21. The grip portion 21 and the insertion portion 22 form a predetermined angle. The insertion part 22 has an elongated flat plate shape. Since the insertion portion 22 has such a shape, flexibility is imparted to the insertion portion 22. If the insertion portion 22 is flexible, the cleaning object 10 can easily follow the surface to be cleaned when the surface to be cleaned having a curved surface or unevenness is cleaned, and the dust removal efficiency is increased. It is advantageous.

  The pair of insertion portions 22 can be inserted into the pair of handle insertion portions 15 in the cleaning article 10, respectively. A hook portion 23 having a shorter length than the insertion portion 22 is provided between the insertion portions 22 and 22. The hook portion 23 has its tip turned upward at a predetermined angle. The hook portion 23 is detached from the cleaning article 10 by engaging with a notch 19 (details will be described later) in the cleaning article 10 in a state where the insertion section 22 is inserted into the handle insertion section 15. It is difficult.

  The forming material of the handle 20 is preferably a thermoplastic resin, and specifically, polyethylene, polypropylene, polyvinyl chloride, polystyrene, ABS resin, acrylic resin, and the like are preferable from the viewpoint of molding processability and flexibility.

  The cleaning article 10 of this embodiment is used for cleaning in a state where the pair of insertion portions 22 and 22 in the handle 20 are inserted and fixed to the pair of handle insertion portions 15 and 15, respectively.

  The front and rear end portions in the longitudinal direction of the handle insertion portion forming sheet 13 are folded inward toward the central portion in the longitudinal direction, and the central portion in the width direction of the folded portion is gripped by a central continuous seal line 16A. The insertion portion forming sheet 13 is joined. At the front and rear end portions in the longitudinal direction of the handle insertion portion forming sheet 13, a notch 19 is provided as an engaging means (a portion that can be engaged with the handle 20) that engages with the hook portion 23 of the handle 20.

  The notch 19 has a U-shape and is opened upward from the inside in the longitudinal direction of the handle insertion portion forming sheet 13 when the hook portion 23 is engaged. When the notch 19 is engaged with the hook portion 23, the handle 20 is restricted from moving in the longitudinal direction of the handle insertion portion 15, particularly to the outside in the longitudinal direction, so that the inserted handle 20 is removed from the cleaning article 10. It is designed to be fixed stably.

Since the notch 19 is formed in both the handle insertion portion forming sheets 13A and 13B facing each other, the handle 20 can be used regardless of whether the hook portion 23 is disposed on the upper surface side or the lower surface side of the cleaning article 10. It can be inserted into the insertion portion 15 and fixed.
In this embodiment, the length of the handle insertion portion 15 is substantially the same as the length of the fiber layer 11 (the length along the insertion direction of the handle insertion portion 15). In consideration of wearability and the like, it is preferable that the length of the handle insertion portion forming sheet 13 is longer than the length of the fiber layer 11 and the length of the handle insertion portion 15 is longer than the length of the fiber layer 11. Yes (not shown).

  Furthermore, it is preferable to reinforce the end portion of the handle insertion portion forming sheet 13 by a known reinforcing means in order to easily apply a force to the handle 20 when attached and to prevent breakage when the force is applied. In the present embodiment, the end portions of the two handle insertion portion forming sheets 13 are folded and integrated at the handle insertion portion 15 to increase the sheet breaking strength.

  Next, a cleaning article 10 according to a second embodiment of the present invention will be described with reference to FIG. Regarding the second embodiment, the description in detail regarding the first embodiment is applied as appropriate to points that are not particularly described. In FIG. 10, the same members as those in FIGS. 1 to 6 are denoted by the same reference numerals.

As shown in FIG. 10, the cleaning article 10 of the second embodiment is provided with only one handle insertion portion 15. Two identical and vertically long handle insertion portion forming sheets 13A and 13B are bonded together by two side non-continuous seals 16B and 16B extending in the longitudinal direction to form a cylindrical handle insertion portion 15. In two side non-continuous seals 16B and 16B (portions surrounded by dotted lines in FIG. 10), as shown in FIG. 10, a point seal 18 by circular heat sealing is provided on the handle insertion portion forming sheets 13A and 13B. It is formed side by side at equal intervals in the longitudinal direction.
The center continuous sealing line 16A by linear heat sealing provided in the cleaning article of the first embodiment joins the handle insertion portion forming sheet 13 and the fiber layer 11, but inserts two grips. The part forming sheets 13A and 13B are not joined to each other.
In the present embodiment, if the width of the insertion portion of the handle 20 has substantially the same width as that of the handle insertion portion 15, the shape of the insertion portion branches into two branches as shown in FIG. 6 as in the first embodiment. Alternatively, it may be an integral shape that is not branched as shown in FIG.
According to the second embodiment, the same effect as the first embodiment can be obtained.

  Next, with respect to one embodiment of the method for manufacturing a cleaning article of the present invention, referring to FIGS. 12 to 16, taking as an example the case of manufacturing the cleaning article 10 of the second embodiment shown in FIG. 10 described above. While explaining. In FIG. 16, the manufacturing process on the second continuum 32B side is substantially the same as the manufacturing process on the first continuum 32A side, and thus illustration is omitted.

In the manufacturing method of this embodiment, the cleaning article 10 is manufactured through the following steps (1) to (3). Moreover, as a fiber layer used at the process of following (1), it consists of a fiber bundle which consists of a crimped fiber bent in zigzag shape, and the thing whose crimp height difference of this fiber is 0.1-0.7 mm is used. .
(1) A step of stacking a belt-like fiber layer composed of continuous fiber bundles and a belt-like sheet member, and joining them partially to form a laminate (2) cutting the laminate into a predetermined length A step, and (3) a step of opening the fiber bundle by applying compressed air to the fiber layer portion in the cut laminate.

Hereinafter, the manufacturing method of this embodiment will be described in detail.
(1) A step of stacking a belt-like fiber layer composed of continuous fiber bundles and a belt-like sheet member and partially joining them together to form a laminate. In this step, first, the first continuous body and the second continuous body Each continuum is manufactured. Only the first continuum 32A will be described, and the description of the second continuum 32B will be omitted. However, the second continuum 32B is manufactured in the same manner as the first continuum 32A.
As shown in FIGS. 12, 13 and 16, the first continuous body 32A includes a first belt-like fiber layer 11A made of continuous fiber bundles, and a first belt-like member 31A made of a continuous nonwoven fabric (band-like sheet member). ), And both are partially joined by the central continuous seal line 16A.
In the present embodiment, as the belt-like fiber layer 11 composed of continuous fiber bundles, a fiber having a crimp formed by so-called overfeed or a fiber having a three-dimensional crimp by another manufacturing method is used. .

  Specifically, as shown in FIG. 16, after the first strip member 31A made of a continuous nonwoven fabric is unwound, both longitudinal ends of the first strip member 31A are folded as shown in FIG. The first strip member 31A is subjected to perforation (breaking guide line) processing to form the breaking guide line 41. The break guide wire 41 is formed intermittently over the entire lengthwise direction of the first strip member 31A. As a result, the first belt-like member 31 </ b> A is partitioned into a central portion 42 sandwiched between the pair of breakage guide wires 41 and an outer portion 43 connected to the center portion 42 via the breakage guide wires 41. Further, as shown in FIGS. 13 and 16, a first fiber layer 11 </ b> A composed of a continuous fiber bundle is supplied on the first belt-like member 31 </ b> A (on the outer surface side), and the first belt-like member 31 </ b> A and the first fiber are supplied. The layer 11A is joined by a central continuous seal line 16A to form a first continuous body 32A. The center continuous seal line 16A is intermittently formed over the entire longitudinal direction of the first fiber layer 11A.

  Next, a first continuous body 32A and a second continuous body 32B manufactured in the same manner are overlapped and fixed, and a third continuous fiber bundle is formed on the first continuous body 32A and the second continuous body 32B. The laminated body 34 is formed by overlapping and fixing the fiber layer 11C and the fourth fiber layer 11D.

Specifically, as shown in FIGS. 14 and 16, the first continuous body 32A and the second continuous body 32B are supplied and overlapped, and both are fixed by the side non-continuous seal 16B, and the continuous body assembly 33 is fixed. Form. The side non-continuous seal 16B is intermittently formed over the entire longitudinal direction of the first fiber layer 11A and the second fiber layer 11B.
Further, as shown in FIGS. 15 and 16, a third fiber layer 11C composed of continuous fiber bundles is stacked on the first continuous body 32A and fixed by the central continuous seal line 16A, and the second continuous body 32B The fourth fiber layer 11D is overlaid and fixed by the center continuous seal line 16A. These fixations are performed in a non-peelable manner by known joining means such as heat sealing and ultrasonic sealing. These fixations may be partial bonding using a large number of dots, lattices, spirals, or the like. Moreover, joining by hot melt may be sufficient. Thereby, the laminated body 34 in which the continuous first fiber layer 11A and the second fiber layer 11B and the continuous third fiber layer 11C and the fourth fiber layer 11D are intermittently formed in the longitudinal direction is obtained.

(2) Step of cutting the laminated body into a predetermined length In this step, as shown in FIG. 16, the laminated body 34 is cut into a length corresponding to approximately one of the individual cleaning articles 35. In addition, each of the first belt-like member 31A and the second belt-like member 31B in the laminated body 35 after cutting is cut by the break guide wire 41, and the outer portion 43 outside the center portion 42 is cut off. The central portion 42 after the outer portion 43 is cut becomes the handle insertion portion forming sheet 13. Further, a handle insertion portion 15 is formed between the opposing handle insertion portion forming sheets 13A and 13B.

(3) The process of applying compressed air to the fiber layer part in the cut laminated body to open the fiber bundle This process is the final stage of production, and in this process, the fiber layer 11 in the cut laminated body 35 On the other hand, the compressed air is applied to open the fiber bundle. The compressed air is applied to the fiber layer using, for example, an air gun connected to a compressor. The air gun preferably blows air onto the fiber layer while swinging the injection port in a direction perpendicular to the fiber orientation direction of the fiber layer.
The cleaning article 10 can be efficiently manufactured in this way.

During the fiber opening in this step, if the crimp height difference of the crimped fibers constituting the fiber layer 11 is greater than 0.7 mm, the fiber bundle cannot be opened to such an extent that dirt can be efficiently collected. . The cleaning article produced by this process is composed of a fiber bundle that cannot be over-tensioned, and has no member for transporting it. Machining with large tension and high-speed machining are not possible. That is, a sufficient external force cannot be applied to the opening. Therefore, it is necessary to use a fiber that can be opened with a relatively small force.
On the other hand, if the crimp height difference is less than 0.1 mm, a bulky fiber layer cannot be formed. That is, the fiber opening is sufficient, but the fiber layer made thereby does not give a sufficient three-dimensional effect and usability.

From the viewpoint of easy entry of fibers into narrow gaps, ease of formation between fibers suitable for dust collection, and effective prevention of aggregation due to entanglement of fibers after opening, the crimp height difference is From the viewpoint of forming a bulky fiber layer and obtaining a three-dimensional appearance and sufficient usability, the crimp height difference is preferably 0.2 mm or more.
In the present embodiment, the compressed air is applied in a state where substantially no tension is applied to the fiber layer 11. The production method of the present invention is more effective in such a case.

  The crimp height difference of the crimped fiber is measured in the same manner as the above-described method for measuring the crimp height difference of the cleaning article. However, at least 5 portions in the fiber bundle that are highly crimped are found, and a sample is cut out. At least 5 samples are measured for one sample. The crimp height of each sample is measured by the method described above. Of all the samples, three of the large values are averaged to obtain the difference in crimp height of the sample.

As described above, the cleaning article and the manufacturing method thereof according to the present invention can be appropriately changed without being limited to the above-described embodiment.
For example, the handle insertion portion may be formed by forming a single handle insertion portion forming sheet 13A into a cylindrical shape. Moreover, the cleaning article manufactured by the manufacturing method of the cleaning article may have the fiber layer 11 only on one side of the handle insertion portion.
Moreover, when it has the some fiber layer 11, only some fiber layers may satisfy the conditions of the height difference mentioned above. For example, as in the cleaning article of the above-described embodiment, when the outer fiber layer 11Q is included in addition to the inner fiber layer 11P, only the outer fiber layer 11Q or only the inner fiber layer 11P satisfies the above-described height difference condition. You may be satisfied. Further, only one of the first to fourth fiber layers 11A to 11D may satisfy the above-described height difference condition.

(Example)
A cleaning article having the form shown in FIG. 10 was produced.
In the production, a band-shaped fiber layer having a crimp height difference of 0.51 mm was used, and the crimp height difference of the constituent fibers of the obtained cleaning article was 0.51 mm.
(Comparative example)
A cleaning article was produced in the same manner as in Example except that the crimp height difference of the belt-like fiber layer used for production was 1.39 mm (Comparative Example 1) or 0.71 mm (Comparative Example 2). In the obtained cleaning article, the crimp height difference of the fibers constituting the fiber bundle was 1.39 mm for Comparative Example 1 and 0.71 mm for Comparative Example 2.

(Evaluation)
The ability to follow uneven surfaces was observed mainly from the lateral direction, using a keyboard of a desktop computer, with fibers entering the gap created by the keys, or wiping the key top. As a result, it was found that the example could enter the gap, but comparative example 1 hardly entered, and comparative example 2 was shallow. Moreover, when the sheet | seat after an experiment is observed, although the entanglement of fiber hardly generate | occur | produced in the Example, the comparative example 1 generate | occur | produced considerably and the comparative example 2 also began to generate | occur | produce.

FIG. 1 is a perspective view showing a state in which a handle is attached to the first embodiment of the cleaning article of the present invention. FIG. 2 is an exploded perspective view of the cleaning article shown in FIG. FIG. 3 is a plan view showing a handle insertion portion forming sheet in the cleaning article shown in FIG. 1. 4A is a cross-sectional view of IVA-IVA shown in FIG. 3, FIG. 4B is a cross-sectional view of IVB-IVB shown in FIG. 3, and FIG. 4C is an exploded cross-sectional view of the cleaning article shown in FIG. is there. FIG. 5 is a perspective view showing a state in which the fiber layer in the cleaning article shown in FIG. 1 is fluffed. FIG. 6 is a perspective view of the handle shown in FIG. FIG. 7 is a photograph for explaining a method of measuring the height difference between peaks and valleys alternately present in the crimped fibers. FIG. 8 is a photograph for explaining a method for measuring the height difference between peaks and valleys alternately present in the crimped fibers. FIG. 9 is a photograph for explaining a method for measuring the number of crimps. FIG. 10 is a plan view (corresponding to FIG. 3) showing the handle insertion portion forming sheet in the cleaning article of the second embodiment. 11 is a perspective view of a handle attached to the cleaning article shown in FIG. FIG. 12 is a view showing a first belt-like member in an embodiment of the method for manufacturing a cleaning article of the present invention, wherein (a) is a plan view and (b) is a longitudinal sectional view along the width direction. FIG. 13 is a view showing a first continuous body in one embodiment of the method for manufacturing a cleaning article of the present invention, wherein (a) is a plan view and (b) is a longitudinal sectional view along the width direction. FIG. 14: is a figure which shows the continuous body joined body of the 1st continuous body and 2nd continuous body in one embodiment of the manufacturing method of the cleaning article of this invention, (a) is a top view, (b) is width It is a longitudinal cross-sectional view along a direction. FIG. 15 is a view showing a laminate in one embodiment of the method for producing a cleaning article of the present invention, wherein (a) is a plan view and (b) is a longitudinal sectional view along the width direction. FIG. 16 is a diagram schematically showing the entire contents of an embodiment of the method for manufacturing a cleaning article of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cleaning article 11A 1st fiber layer 11B 2nd fiber layer 11C 3rd fiber layer 11D 4th fiber layer 13A 1st handle insertion part formation sheet 13B 2nd handle insertion part formation sheet 15 Handle insertion part 16A Center continuous seal line 16B Side discontinuous seal 18 Point seal 20 Handle 22 Insertion portion 31A First strip member (band-shaped sheet member)
31B Second strip member (strip-shaped sheet member)
32A First continuous body 32B Second continuous body 33 Continuous body joined body 34 Laminated body

Claims (1)

A belt-like inner fiber layer composed of continuous fiber bundles and a belt-like sheet member are overlapped, and both are partially joined to form a first continuous body, and a second continuous body is formed in the same manner. After the first and second continuums are overlapped and partially fixed, a belt-like outer fiber layer composed of continuous fiber bundles is overlapped and fixed on the inner fiber layer side of each of the first and second continuums. A step of cutting the laminate obtained in the step into a predetermined length, and a step of opening the fiber bundle by applying compressed air to the fiber layer portion in the cut laminate A method for manufacturing an article, comprising:
Each of the belt-like inner fiber layer and outer fiber layer is composed of a fiber bundle made of crimped fibers bent in a zigzag shape, and the height difference between peaks and valleys alternately present in the crimped fibers is 0.1-0. .7mm,
In the step of opening the fiber bundle, the fiber bundle in the cut laminate is raised so that the entire circumference of the cleaning article is covered with the tip of the brush made of fibers of the fiber bundle. Method.