JP2011135999A - Cleaning sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning sheet capable of catching cotton-like dust and wiping off even relatively larger dust, especially rice grains, crumbs, sesame seeds or sand or the like. <P>SOLUTION: In the cleaning sheet 1A, each of a plurality of fiber aggregates 2, 3 in which the twist number of configuring short fibers is different is bonded through a bonding part 5 to one surface of a base material sheet 4 to form a cleaning part 6. The plurality of bonding parts 5 are disposed at a predetermined interval in one direction. Each of the plurality of fiber aggregates 2, 3 has a string-like shape extending in one direction and is juxtaposed. Each of the plurality of fiber aggregates 2, 3 forms a first fiber assembly group 20 including the fiber aggregate 2 of a high twist number, and a second fiber assembly group 30 including the fiber aggregate 3 of a low twist number. The interval of the respective fiber aggregates 2 of the high twist number in the first fiber assembly group 20 is shorter than the interval of the respective fiber aggregates 3 of the low twist number in the second fiber assembly group 30. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cleaning sheet for wiping off dust such as floors, tatami mats, walls and windows.

  As a cleaning tool using short fibers, a mop or a rag as a woven cloth has been widely used for a long time. Since these were used repeatedly, durability was required. Further, since the fiber is generally used by being wetted with water or the like, the fiber is formed by being strongly twisted, and the fiber itself does not have a function of entwining cotton-like dust and the like.

  In addition to such conventional cleaning tools, there are known cleaning tools that focus on cleaning dust that is relatively larger than cotton-like dust, such as hair, paper pieces, confectionery pieces, and the like. For example, Patent Document 1 describes a cleaning cloth that includes a cut pile portion at a main portion of a sheet-like base portion and a loop pile portion at the outer periphery of the cut pile portion. However, Patent Document 1 does not describe anything about forming by adding fibers, and in the cleaning cloth described in Patent Document 1, the cut pile portion or the loop pile portion is composed of ultrafine fibers. Therefore, it is still difficult to wipe off relatively large dust, particularly rice grains, bread crumbs, sesame grains, sand grains, and the like.

  Patent Document 2 describes a cleaning wiping body including a region made of a loop pile at the center of the lower surface of a sheet-like base material and a region made of a cut pile on the outer periphery of the region of the loop pile. Yes. It is described that the cut pile in the cleaning wiping body described in Patent Document 2 is formed by loosely twisting a plurality of long fibers. However, since it is a long fiber, there is a problem that the function of entwining cotton-like dust is weak, and the captured dust is easily separated.

JP 2003-111708 A JP 2007-202966 A

  Accordingly, an object of the present invention is to provide a cleaning sheet that can entangle cotton-like dust and can wipe off relatively large dust, particularly rice grains, bread crumbs, sesame grains, sand grains, and the like.

  In the present invention, a plurality of fiber assemblies each made of a short fiber and having a different number (JIS L1095) of the short fibers are bonded to at least one surface of the base sheet via the plurality of bonding portions to form a cleaning portion. A plurality of the joint portions are arranged at a predetermined interval in one direction, and each of the plurality of fiber assemblies has a string-like shape extending in one direction, and is arranged side by side. A first fiber aggregate group composed of a higher number of fiber aggregates and a second fiber aggregate group composed of a lower number of fiber aggregates, each of which is more than each of the first fiber aggregate groups. A cleaning sheet is provided in which the interval between the higher fiber assemblies is shorter than the interval between the lower fiber assemblies in the second fiber assembly group.

  According to the cleaning sheet of the present invention, cotton-like dust can be entangled and relatively large dust, particularly rice grains, bread crumbs, sesame grains, sand grains, etc. can be wiped off.

FIG. 1 is a perspective view of a cleaning sheet according to the first embodiment of the present invention. 2 is a cross-sectional view taken along line Y1-Y1 of the cleaning sheet shown in FIG. FIG. 3 is a sectional view taken along line X1-X1 of the cleaning sheet shown in FIG. FIG. 4 is a perspective view showing one usage pattern of the cleaning sheet shown in FIG. 1. FIG. 5 is a perspective view of a cleaning sheet according to the second embodiment of the present invention. FIG. 6 is a perspective view of a cleaning sheet according to the third embodiment of the present invention. FIG. 7 is a schematic diagram illustrating a cleaning sheet manufacturing apparatus.

  Hereinafter, the cleaning sheet of this invention is demonstrated based on the preferable 1st Embodiment, referring FIGS. 1-4. In the drawings, the same reference numerals indicate the same components.

  The cleaning sheet 1 </ b> A of the first embodiment is made of short fibers, and each of a plurality of fiber assemblies 2 and 3 having a different number (JIS L1095) than the short fibers has a plurality of joint portions 5 on at least one surface of the base sheet 4. The cleaning part 6 is formed by being joined via. The base sheet 4 forming the cleaning sheet 1A is a rectangular sheet having a longitudinal direction (X direction in the figure) and a width direction (Y direction in the figure) perpendicular to the longitudinal direction, as shown in FIG. The length in the X direction is 250 mm to 310 mm, and the length in the Y direction is 205 mm to 250 mm. 1 A of cleaning sheets of 1st Embodiment have the cleaning part 6 on the one surface 4a of the base material sheet 4, However, You may have the cleaning part 6 on the other surface 4b, Both surfaces 4a, You may have the cleaning part 6 in each 4b. The cleaning unit 6 is formed in the central region of the base sheet 4 in the Y direction. The base sheet 4 is formed with a pair of flap portions 41 extending from both side edges 6a in the Y direction along both side edges 6a extending in the X direction of the cleaning portion 6. On the other hand, with respect to the X direction, the cleaning unit 6 extends over the entire area of the base sheet 4 in the X direction.

  As shown in FIG. 1, the cleaning unit 6 of the cleaning sheet 1A includes a plurality of fiber assemblies 2 and 3 having different numbers of short fibers (JIS L1095), and the plurality of fiber assemblies 2 and 3 It has a string-like shape extending in one direction and is juxtaposed. Here, “extending in one direction” means not only extending in a straight line but also extending in a wavy line. The short fiber refers to a fibrous raw material used for spinning, and can be generally obtained by cutting long fibers. The cleaning unit 6 of the cleaning sheet 1A will be described in detail below.

  As shown in FIG. 1, the fiber assemblies having different numbers (JIS L1095) are roughly classified into fiber assemblies 2 having higher numbers and fiber assemblies 3 having lower numbers. The cleaning unit 6 includes a plurality of higher fiber assemblies 2 and a plurality of lower fiber assemblies 3. Each of the plurality of higher fiber assemblies 2 and the plurality of lower fiber assemblies 3 has a string-like shape extending in the X direction in the first embodiment, as shown in FIG. And juxtaposed in the Y direction on one surface 4a of the base sheet 4.

  As shown in FIG. 1, the plurality of fiber assemblies 2 and 3 include a first fiber assembly group 20 composed of a plurality of higher fiber assemblies 2 and a first fiber assembly 3 composed of a plurality of lower fiber assemblies 3. 2 fiber assembly group 30 is formed. The first fiber assembly group 20 is preferably formed from two or more, preferably 2 to 10 higher fiber assemblies 2 from the viewpoint of efficiently collecting and holding dust. In the first embodiment, as shown in FIG. 1, the fiber assembly 2 is formed of three higher numbers. Among dusts, relatively large dusts, particularly rice grains, bread crumbs, sesame grains, sand grains, etc. can be wiped off. The second fiber assembly group 30 is preferably formed from one or more, preferably 2 to 10 lower fiber assemblies 3 from the viewpoint of entwining cotton-like dust. In the form, as shown in FIG. 1, it is formed from two higher fiber assemblies 2.

  From the viewpoint of efficiently collecting and holding dust on the one surface 4a of the base sheet 4, the first fiber assembly group 20 is preferably arranged in one or more, preferably 2 to 50, In the cleaning sheet 1 </ b> A of the embodiment, as shown in FIG. 1, two first fiber assembly groups 20 are arranged. Moreover, it is preferable that the 1st fiber assembly group 30 is distribute | arranged to the one surface 4a of the base material sheet 4 from the viewpoint of winding up cotton-like dust, Preferably it is 2-50 pieces, 1st In the cleaning sheet 1A of the embodiment, as shown in FIG. 1, three second fiber assembly groups 30 are arranged. As shown in FIG. 1, the cleaning sheet 1 </ b> A of the first embodiment has two first fiber assembly groups 20 and three second fiber assembly groups 30, and extends in the X direction of the cleaning unit 6. The cleaning unit 6 is formed by alternately arranging the second fiber assembly group 30 and the first fiber assembly group 20 in order from the side edge 6a.

  In the present invention, the intervals between the higher fiber assemblies 2 in the first fiber assembly group 20 are shorter than the intervals between the lower fiber assemblies 3 in the second fiber assembly group 30. Yes. Here, the interval is determined based on the joint portion 5 that joins the fiber assemblies 2 and 3 to the base sheet 4. This will be specifically described below. The plurality of joint portions 5 are arranged at a predetermined interval in one direction. Here, “one direction” is not only arranged on an imaginary straight line extending in a straight line, but also arranged in a so-called zigzag form so that the fiber assemblies 2 and 3 extend in a wavy line shape. Including meaning. In the cleaning sheet 1 </ b> A of the first embodiment, as shown in FIG. 1, each of the higher-numbered fiber assemblies 2 and the lower-numbered fiber assemblies 3 has a plurality of lines arranged in a straight line in the X direction. It is joined to the base material sheet 4 in a straight line by the joining part 5. Accordingly, the interval between the higher fiber assemblies 2 in the first fiber assembly group 20 is the center of each of the plurality of joints 5 that join the higher fiber assemblies 2 onto the base sheet 4. Is a distance between a virtual straight line passing through the center of each of the plurality of joints 5 joining the higher number of fiber aggregates 2 adjacent in the Y direction, and the second fiber aggregate group. Similarly, the interval between the lower fiber assemblies 3 at 30 is also an imaginary straight line that passes through the center of each of the plurality of joints 5 that joins the lower fiber assemblies 3 onto the base sheet 4; It is an interval between a virtual straight line passing through the center of each of a plurality of joints 5 that join together a lower number of fiber assemblies 3 adjacent in the Y direction. In the case where the higher number of fiber assemblies 2 or the lower number of fiber assemblies 3 are arranged in a wavy pattern and the plurality of joints 5 are arranged in a staggered pattern, for example, a wavy line A virtual straight line passing through the center of each of the plurality of joints 5 located on the mountain side of the higher number of fiber assemblies 2 and a plurality of joints located on the valley side of the higher number of wavy fiber assemblies 2 5 The above-mentioned interval can be obtained by obtaining an average virtual straight line that bisects the virtual straight line passing through the center of each of the five wavy fiber assemblies 2.

  As shown in FIG. 2, the spacing (L1) between the higher fiber assemblies 2 in the first fiber assembly group 20 is relatively large dust, especially rice grains, bread crumbs, sesame grains, sand grains, etc. From the viewpoint of sandwiching between the base sheet 4 and the higher fiber assemblies 2 and 2 adjacent in the Y direction, it is preferably 0.01 to 2 mm, and more preferably 0.01 to 1 mm. . Each interval (L1) between the fiber assemblies 2 having a higher number may be uniform or not uniform as in the cleaning sheet 1A of the first embodiment. What is necessary is just to be shorter than the space | interval (L2) between the fiber assemblies 3 whose number is lower than each.

  As shown in FIG. 2, the interval (L2) between the lower fiber assemblies 3 in the second fiber assembly group 30 is entangled with cotton-like dust, from the viewpoint of facilitating the movement of the fibers by the cleaning operation, It is preferable that it is 1-50 mm, and it is still more preferable that it is 2-30 mm. Each interval (L2) between the fiber assemblies 3 having a lower number may or may not be uniform as in the cleaning sheet 1A of the first embodiment.

  The fiber assemblies 2 and 3 constituting the cleaning unit 6 are string-like ones extending in one direction. The string-like fiber aggregates 2 and 3 have a predetermined thickness and a shape having a length sufficiently larger than the thickness. The string-like fiber aggregates 2 and 3 are composed of a large number of short fiber aggregates. The short fibers are in a state of being entangled with each other, thereby maintaining a string-like form.

  A large number of short fibers constituting the string-like fiber assemblies 2 and 3 are entangled with a degree of fiber entanglement sufficient to keep the fiber assemblies 2 and 3 in a string-like form. Therefore, from the viewpoint of shape retention, the higher the degree of fiber entanglement of short fibers, the better. In other words, the lower the degree of freedom of the short fibers, the better. However, the low degree of freedom of the fiber has a negative effect from the viewpoint of the trapping property and the dust retention property of entwining the cotton-like dust of the string-like fiber assemblies 2 and 3. Therefore, the short fibers constituting the string-like fiber aggregates 2 and 3 have the trapping property of entwining the cotton-like dust on the condition that the fiber aggregates 2 and 3 ensure the string-like shape retention. It is necessary to have a high degree of fiber freedom sufficient to retain the collected dust.

  Furthermore, as described above, the higher number of string-like fiber aggregates 2 need to have a strength such that a relatively large dust is sandwiched between them, and the sandwiched dust is retained. From this point of view, the short fibers constituting the higher number of string-like fiber assemblies 2 have a particularly limited degree of fiber freedom with the number as a scale than described in the JIS L1095 general spun yarn test method. 10 to 1000 times / m, preferably 10 to 500 times / m.

  The short fibers constituting the lower-string-like fiber assembly 3 have a degree of fiber freedom of 10 to 200 times / m based on the number described in the JIS L1095 General Spinning Yarn Test Method. It is preferably 10 to 100 times / m, and more preferably. When the number is more than 10 to 200 times / m, a satisfactory cotton-like dust collecting ability and a retention ability of the collected cotton-like dust are exhibited. Note that the lower limit of the number is set to 10 times / m or more from the viewpoint of securing the string-like shape retaining property of the fiber assembly 3 having a lower number and preventing the short fibers from falling off by the cleaning operation.

  The short fibers constituting the string-like fiber assemblies 2 and 3 preferably have a fiber length of 12 to 180 mm, and more preferably 38 to 120 mm. By setting the fiber length within this range, the performance of entwining and collecting cotton-like dust increases. Moreover, it is possible to effectively prevent the short fibers from fluffing during cleaning. As will be described later, when the short fiber has a crimp, the length of the short fiber in a state where the crimp is stretched and straightened is defined as the length of the short fiber.

  The thickness of the short fibers constituting the string-like fiber assemblies 2 and 3 is preferably 1.0 to 8.0 dtex, and particularly preferably 1.5 to 6.6 dtex. By setting the thickness within this range, the short fiber comes to have an appropriate rigidity, and the cleaning unit 6 can sufficiently follow the surface to be cleaned having unevenness, for example, a rail of a sill or a sliding door. Further, the cleaning unit 6 can sufficiently follow the corners of the room and the narrow places such as the door stopper and the periphery thereof. In addition, dust collection is improved.

As the short fibers constituting the string-like fiber assemblies 2 and 3, it is preferable to use those having crimps from the viewpoint of further improving the collection ability of the cotton-like dust. As the crimped fiber, a two-dimensional crimp or a three-dimensional crimp can be used. The crimped fiber has a crimp rate (JIS L0208) of 5 to 50%, particularly preferably 10 to 30%. The crimp rate 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 with respect to the length A when the fiber is stretched, and is calculated from the following equation.
Crimp rate = (A−B) / A × 100 (%)

  The number of crimps of the crimped fibers is related to the bulkiness of the string-like fiber assemblies 2 and 3. Specifically, the larger the number of crimps, the bulkier the string-like fiber assembly 2 becomes. From this viewpoint, the number of crimps is preferably 3 to 80, particularly 5 to 40. The number of crimps is measured according to JIS L1015.

  There is no restriction | limiting in particular in the shape of the cross section of the string-like fiber assemblies 2 and 3, For example, shapes, such as circular, an ellipse, a rectangle, a flat shape, can be employ | adopted. The thickness of the higher number of string-like fiber assemblies 2 is 2 to 20 mm, especially 3 to 6 mm when the cross section is circular, and it is easy to sandwich dust, It is preferable from the viewpoint of improving the followability to the groove and the ease of joining to the base sheet 4. The string-like lower fiber assembly 3 has a thickness of 2 to 20 mm, particularly 3 to 10 mm, when the cross section is circular, and it is easy to entangle cotton-like dust, and an uneven surface. From the viewpoint of improving the followability to the groove and the ease of joining to the base sheet 4, it is preferable. In the first embodiment, as shown in FIG. 1, the string-like fiber assemblies 2 and 3 have a uniform thickness over the entire region in the extending direction, but are not limited thereto. Those having a beaded shape or those having uneven thickness can also be used. The thickness of the string-like fiber assemblies 2 and 3 corresponds to the thickness of the cleaning unit 6. The thickness of the cleaning sheet 1A in the cleaning unit 6 is preferably 2 to 20 mm, particularly 3 to 10 mm under a load of 300 Pa.

  In 1st Embodiment, the 2nd fiber assembly which consists of the 1st fiber assembly group 20 which consists of a higher number of fiber assemblies 2, and the lower number of fiber assemblies 3 over the full length of the base material sheet 4 in the X direction. Since each group 30 is arranged, the length in the X direction of the higher fiber assembly 2 in each of the first fiber assembly groups 20 and the lower fiber assembly 3 in each of the second fiber assembly groups 30 are arranged. The length in the X direction is substantially the same as the length in the X direction of the base sheet 4. However, instead of this, the length in the X direction of each higher fiber assembly 2 of the first fiber assembly group 20 or the X direction of each lower fiber assembly 3 in the second fiber assembly group 30. May be longer than the length of the base sheet 4 in the X direction.

  As shown in FIG. 1, the base sheet 4 and the string-like fiber aggregates 2 and 3 are joined at a joining portion 5. It is preferable that 2 to 20 joining portions 5 are arranged from the viewpoint of stably joining the fiber assemblies 2 having a higher number to the base sheet 4 and achieving both collection and fixing properties. In the first embodiment, eight junction points are arranged. It is preferable that 2 to 20 bonding portions 5 are arranged from the viewpoint of stably bonding the lower number of fiber assemblies 3 to the base sheet 4 and achieving both the collection property and the followability. In the first embodiment, eight junction points are arranged. In the cleaning sheet 1A of the first embodiment, as shown in FIG. 1, it is based on a joining portion 5 that joins a higher number of fiber assemblies 2 to a base sheet 4 and a lower number of fiber assemblies 3. The joint portions 5 to be joined to the material sheet 4 are intermittently arranged in the X direction with an equal interval, but may not be an equal interval.

  The higher fiber assemblies 2 are adjacent in the X direction from the viewpoint of sandwiching relatively large dust between the base sheet 4 and the higher fiber assemblies 2 and 2 adjacent in the Y direction. In order not to form a loop between the joints 5, that is, so as not to loosen, the interval between the joints 5 adjacent to each other in the X direction and the number between the joints 5 adjacent to each other in the X direction are larger. The length of the high fiber assembly 2 is preferably substantially the same. It is preferable that the space | interval of the junction parts 5 adjacent to the X direction which joins the fiber assembly 2 with a higher number is 5 mm-50 mm. In addition, the length of the higher fiber assembly 2 is the length of the short fiber which comprises the higher fiber assembly 2, and can be calculated | required by the method mentioned above.

  On the other hand, as shown in FIG. 3, the fiber assemblies 3 having a smaller number are looped between the joint portions 5 adjacent to each other in the X direction from the viewpoint of entwining the cotton-like dust and holding the entangled dust. Of the fiber assembly 3 having a lower number between the adjacent joint portions 5 than the interval (L3) between the adjacent joint portions 5 in the string-like direction of the string-like fiber assembly. It is preferable that the length (L4) is long. It is preferable that the space | interval (L3) of the junction parts 5 adjacent to the X direction which joins the fiber assembly 3 with a lower number is 5 mm-100 mm, and a fiber with a lower number between adjacent junction parts 5 is. The length (L4) of the aggregate 3 is preferably 10 mm to 50 mm. The length (L4) of the fiber assembly 3 having a lower number between adjacent joints 5 is 1.0 to 10 times the interval (L3) between adjacent joints 5 in the X direction. It is preferable that it is 1.2 times-5 times. In addition, the length of the fiber assembly 3 having a lower number can be similarly obtained as the length of the short fiber constituting the fiber assembly 3 having a lower number.

  Examples of the short fibers constituting the string-like fiber aggregates 2 and 3 include synthetic fibers made of thermoplastic resin, natural fibers such as cotton, hemp, and wool, regenerated fibers such as rayon, and semi-synthetic fibers such as acetate. Can be used. These fibers can be used alone or in combination of two or more. Considering the ease of joining the string-like fiber assemblies 2 and 3 and the base sheet 4, synthetic fibers made of a thermoplastic resin, which is a material that can be easily heat-sealed, are used as the short fibers. Is preferred. Examples of the thermoplastic resin include polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, acrylic resins, and vinyl resins. The synthetic fiber may be composed of a single resin, or may be a composite fiber (for example, a core-sheath type composite fiber, a side-by-side type composite fiber, or a split fiber) formed by combining two or more resins.

  The short fiber may be coated with a drug. By applying chemicals for the purpose of dry and dry cleaning, the collection ability using the adsorption of dust is enhanced. Examples of such agents include various oil component components. As the oil agent component, for example, oil agents such as mineral oil, synthetic oil, silicone oil, and the like, and those obtained by mixing a surfactant, a solvent, an antioxidant, a perfume and the like with the oil agent component can be used. The coating amount of the drug including the oil component can be about 0.1 to 50% by weight with respect to the weight of the short fiber.

  When the cleaning sheet 1A is used for the purpose of wet wet cleaning, by impregnating it with a cleaning agent, stain stains and solid sticky stains are dissolved to improve the cleaning performance. As the cleaning agent, a mixture of a surfactant, a solvent, a disinfectant, a preservative, a fragrance, water, or the like can be used. The impregnation amount of the cleaning agent can be about 20 to 500% by weight with respect to the weight of the short fiber.

  In addition to being used for dry dry cleaning and wet wet cleaning purposes, the cleaning sheet 1A wipes, wipes, and impregnates liquids such as water, commercially available cleaning agents and wax agents. You can also use it like a rag.

  As the string-like fiber aggregates 2 and 3 made of the above short fibers, those manufactured by twisting by a spinning process are generally used.

As the base sheet 4 to which the string-like fiber assemblies 2 and 3 are fixed, for example, various non-woven fabrics and films made of synthetic resin, pulp, and pulp from the viewpoint of easy joining to the string-like fiber assemblies 2 and 3 The paperboard board which consists of this, the paperboard board which mixed the synthetic resin in the pulp, or those composite materials can be used. When using a nonwoven fabric, a spunlace nonwoven fabric, an air through nonwoven fabric, a spun bond nonwoven fabric, an airlaid nonwoven fabric, etc. are mentioned as a suitable example, for example. The basis weight of these nonwoven fabrics is preferably ³ to 200 g / m ² , particularly 10 to 100 g / m ² from the viewpoints of strength and strain strength. For the same reason, when a film is used, the basis weight is preferably 3 to 500 g / m ² , particularly preferably 10 to 250 g / m ² . When using paperboard, the basis weight is preferably 10 to 500 g / m ² , particularly preferably ²⁰ to 250 g / m ² . As a synthetic resin which comprises the base material sheet 4, the thing similar to what was mentioned above as a synthetic resin which comprises a short fiber can be used.

  For example, as shown in FIG. 4, the cleaning sheet 1 </ b> A is used by being attached to the cleaning tool 100. The cleaning tool 100 includes a head portion 101 to which a cleaning sheet 1A can be attached, and a rod-shaped handle 102 connected to the head portion 101 via a universal joint 103. The mounting surface (bottom surface) of the head unit 101 has a rectangular shape in plan view. In a normal use mode, the cleaning tool 100 performs cleaning by moving the head unit 101 in the Y direction (particularly, reciprocating movement). . The cleaning sheet 1 </ b> A is attached to the head portion 101 of the cleaning tool 100 using the flap portion 41 of the base material sheet 4. In the cleaning sheet 1 </ b> A, the other surface 4 b of the base material sheet 4 on which the cleaning unit 6 is not provided is disposed on the head unit 101 so as to face the mounting surface (bottom surface) of the head unit 101. Next, the flap portion 41 in the base sheet 4 is folded back to the upper surface side of the head portion 101, and the flap portion 41 is further pushed into the flexible sheet holding portions 104 having radial slits in the head portion 101. . Thus, the cleaning sheet 1 </ b> A can be fixed to the head portion 101 of the cleaning tool 100 using the flap portion 41 of the base sheet 4. In this state, the cleaning sheet 1A can be used, for example, for wiping and cleaning hard surfaces such as flooring, walls, ceilings, glass, tatami mats, mirrors and furniture, home appliances, home outer walls, and automobile bodies.

  Next, the suitable manufacturing method of the cleaning sheet 1A of 1st Embodiment is demonstrated, referring FIG. In the manufacturing apparatus 50 shown in FIG. 7, first, the belt-shaped base sheet 4 ′ is fed out from the raw roll 40 </ b> A of the base sheet 4. Separately from this, the elongated raw material 2 ′ of the higher number of string-like fiber assemblies 2 is fed out from the take-up roll 20 </ b> A of the higher-numbered string-like fiber assemblies 2 manufactured in advance, and wound up. An elongated raw material 3 ′ of a lower number of fiber aggregates 3, which is arranged in the downstream side of the roll 20 A, is taken from a winding roll 30 A of a lower number of fiber aggregates 3 manufactured in advance. The long raw materials 2 ′ and 3 ′ are placed on one surface of the belt-shaped base sheet 4 ′. In FIG. 7, each of the long raw material 2 ′ of the fiber aggregate 2 having a higher number of string-like shapes and the long raw material 3 ′ of the fiber aggregate 3 having a lower number of string-like shapes is respectively provided. Although shown as being drawn out, a plurality of pieces are actually drawn out in order to form the cleaning portion 6 of the cleaning sheet 1A shown in FIG. Moreover, in the manufacturing apparatus 50 shown in FIG. 7, the winding roll 30A is disposed on the downstream side of the winding roll 20A, but the winding roll 20A is disposed on the downstream side of the winding roll 30A. Also good.

  A strip-like base material sheet 4 ′ on which a long raw material 2 ′ of a higher number of string-like fiber assemblies 2 and a long raw material 3 ′ of a lower number of string-like fiber assemblies 3 are placed. Is introduced into the embossing device 51. The embossing device 51 includes a first roll 51a in which a large number of protrusions 51c are distributed on the peripheral surface, and an anvil roll 51b disposed to face the first roll 51a. Both rolls 51a and 51b are arranged in a distance relationship such that the protrusion 51c of the first roll 51a is in contact with or close to the peripheral surface of the anvil roll 51b. Of the two rolls 51a and 51b, at least the first roll 51a is heated. In addition to such an embossing device 51, an embossing method in which a roll similar to the protrusion 51c of the first roll 51a is disposed in place of the roll of the anvil roll 51b disposed to face the roll 51a, and the protrusions 51c are brought into contact with each other. (Tip to Tip method) can also be used. By the action of heat and pressure using the embossing device 51, the fibers constituting the long raw materials 2 ′ and 3 ′ and the strip-shaped base sheet 4 ′ are melted and solidified, and the long raw materials 2 ′, 3 ′ and the strip are formed. The base material sheet 4 ′ is joined. By this joining, a plurality of joining portions 5 (see FIG. 1) are formed. The shape of the joint portion 5 is generally shown as a dot (circular) shape, but instead of this, a shape other than a dot (circular) shape such as an elliptical shape, a triangular shape, a square shape, a V shape, or a cross shape is used. It can also be used.

  In this way, a belt-like cleaning sheet 1A 'is obtained. Next, the belt-shaped cleaning sheet 1 </ b> A ′ is introduced into the width direction cutting device 52. The width direction cutting device 52 includes a first roll 52a in which protruding strip blades 52c extending in the axial direction of the roll are arranged at a predetermined interval in the circumferential direction, and an anvil roll arranged to face the first roll 52a. 52b. Both rolls 52a and 52b are arranged in a distance relationship such that the convex blade 52c of the first roll 52a is in contact with or close to the peripheral surface of the anvil roll 52b. By introducing the strip-shaped cleaning sheet 1A 'into the width direction cutting device 52, the strip-shaped cleaning sheet 1A' is cut along the width direction at a predetermined interval. By this cutting, the belt-like cleaning sheet 1A 'becomes a sheet, and the target cleaning sheet 1A is obtained.

  In this manufacturing method, the drug coating device may be installed at a position immediately downstream of the embossing device 51 shown in FIG. For example, a spray device is used for applying the medicine. Further, a gravure roll coating method may be used for drug coating.

Next, the cleaning sheet of 2nd Embodiment of this invention is demonstrated based on FIG.
About the cleaning sheet 1B of 2nd Embodiment (henceforth "cleaning sheet 1B"), a different point from the cleaning sheet 1A of 1st Embodiment is demonstrated. The points that are not particularly described are the same as those of the cleaning sheet 1A, and the description of the cleaning sheet 1A is applied as appropriate.

  In the cleaning sheet 1B of the second embodiment, as shown in FIG. 5, the first fiber assembly group 20 is formed of five higher fiber assemblies 2, and the second fiber assembly group 30 is It is formed from two lower fiber assemblies 3.

  In the cleaning sheet 1 </ b> B of the second embodiment, as shown in FIG. 5, one first fiber assembly group 20 is arranged on one surface 4 a of the base material sheet 4, and on one surface 4 a of the base material sheet 4. Two second fiber assembly groups 30 are arranged. In the cleaning sheet 1 </ b> B of the second embodiment, as shown in FIG. 5, one first fiber assembly group 20 is arranged at the center in the Y direction, and each outer side of the first fiber assembly group 20 in the Y direction. In addition, the second fiber assembly group 30 is arranged to form the cleaning unit 6.

  The material for forming the cleaning sheet 1B of the second embodiment will be described. About the cleaning sheet 1B of 2nd Embodiment, it is the same as that of the formation material of 1 A of cleaning sheets of 1st Embodiment.

The effect at the time of using the cleaning sheet 1B of 2nd Embodiment of this invention mentioned above is demonstrated.
About the effect of the cleaning sheet 1B of 2nd Embodiment, it is the same as that of the cleaning sheet 1A.

Next, the cleaning sheet of 3rd Embodiment of this invention is demonstrated based on FIG.
Regarding the cleaning sheet 1C of the third embodiment (hereinafter, also referred to as “cleaning sheet 1C”), differences from the cleaning sheet 1A of the first embodiment will be described. The points that are not particularly described are the same as those of the cleaning sheet 1A, and the description of the cleaning sheet 1A is applied as appropriate.

  In the cleaning sheet 1C of the third embodiment, as shown in FIG. 6, each of the plurality of higher fiber assemblies 2 and the plurality of lower fiber assemblies 3 has a string-like shape extending in the Y direction. And is juxtaposed in the X direction on one surface 4a of the base sheet 4.

  In the cleaning sheet 1 </ b> C of the third embodiment, as shown in FIG. 6, the first fiber assembly group 20 is formed of three higher fiber assemblies 2, and the second fiber assembly group 30 is It is formed from two lower fiber assemblies 3.

  In the cleaning sheet 1 </ b> C of the third embodiment, as shown in FIG. 6, four first fiber assembly groups 20 are arranged on one surface 4 a of the base material sheet 4, and on the one surface 4 a of the base material sheet 4. Five second fiber assembly groups 30 are arranged. In the cleaning sheet 1 </ b> C of the third embodiment, as shown in FIG. 6, the cleaning sheet 1 </ b> C has four first fiber assembly groups 20 and five second fiber assembly groups 30. The cleaning unit 6 is formed by alternately arranging the second fiber assembly group 30 and the first fiber assembly group 20 in order from the end.

  A material for forming the cleaning sheet 1 </ b> C of the third embodiment will be described. About the cleaning sheet 1C of 3rd Embodiment, it is the same as that of the formation material of 1 A of cleaning sheets of 1st Embodiment.

The effect at the time of using the cleaning sheet 1C of 3rd Embodiment of this invention mentioned above is demonstrated.
About the effect of the cleaning sheet 1C of 3rd Embodiment, a different point from the effect of the cleaning sheet 1A is demonstrated. The points that are not particularly described are the same as the effects of the cleaning sheet 1A, and the description of the effects of the cleaning sheet 1A is appropriately applied.

  In the cleaning sheet 1 </ b> C of the third embodiment, the arrangement of the fiber assemblies is parallel to the wiping direction, so that dust is easily taken up.

  The cleaning sheet of the present invention is not limited to the cleaning sheets 1A, 1B, and 1C of the first, second, and third embodiments described above, and can be changed as appropriate. Moreover, each component in cleaning sheet 1A, 1B, 1C of the above-mentioned 1st, 2nd, 3rd embodiment can be implemented suitably combining in the range which does not impair the meaning of this invention.

  For example, the cleaning sheets 1A, 1B, and 1C of the first, second, and third embodiments described above include the first fibers made of the higher number of fiber assemblies 2, as shown in FIGS. The second fiber aggregate group 30 composed of the aggregate group 20 and the lower number of fiber aggregates 3 is arranged adjacent to each other in the X direction or the Y direction, but the first fiber aggregate group 20 and the second fiber aggregate are arranged. Still another fiber assembly composed of a single fiber assembly may be disposed between the group 30 and a fiber assembly group composed of this another fiber assembly may be disposed. Moreover, in order to divide the 1st fiber assembly group 20 and the 1st fiber assembly group 20 in a part of cleaning part 6, you may arrange | position the fiber assembly 3 with a lower number which consists of one, or 1st In order to separate the two-fiber assembly group 30 from the second fiber-assembly group 30, a higher-number fiber assembly 2 made of a single fiber assembly 2 may be arranged.

Moreover, although the cleaning sheets 1A, 1B, and 1C of the first, second, and third embodiments described above have been used by being mounted on the cleaning tool illustrated in FIG. The cleaning sheet formed in the shape of a flat bag having an insertion space described in Japanese Patent Application Laid-Open No. 9-299305 related to the earlier application, and the cleaning sheet of the handy wiper type cleaning tool described in the same publication It may be attached to the head or may be cleaned by holding it directly by hand.
Moreover, in the said embodiment, although the cleaning part was formed only in the single side | surface of the base material sheet 41, it may replace with this and may form a cleaning part in both surfaces of the base material sheet 41.

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

[Example 1]
A cleaning sheet 1A was manufactured using the apparatus shown in FIG. A spunbonded nonwoven fabric having a basis weight of 30 g / m ² was used as the substrate sheet 4. This nonwoven fabric was composed of polyester fibers. The base sheet 4 had a length in the longitudinal direction X of 280 mm and a length in the width direction Y of 210 mm. Three second fiber assembly groups 30 and two first fiber assembly groups 20 were alternately arranged on one surface of the base sheet 4 in the Y direction. Each first fiber assembly group 20 is formed by arranging three higher fiber assemblies 2 with a spacing (L1) of 0.01 mm. The fiber assembly 2 having a higher number had a circular cross section and a thickness of 3 mm. The fiber assembly 2 having a higher number is formed by twisting three polyester short fiber assemblies having a fiber length of 64 mm at several 200 times / m using a ring twisting machine. Each second fiber aggregate group 30 is formed by arranging two lower fiber aggregates 3 at an interval (L2) of 7 mm. The fiber assembly 3 having a lower number has a circular cross section and a thickness of 5 mm. The fiber assembly 3 having a lower number is formed by twisting three polyester short fiber assemblies having a fiber length of 78 mm at several tens of turns / m using a ring twisting machine. The higher number of fiber assemblies 2 and the lower number of fiber assemblies 3 are joined to one surface of the base sheet 4 via the eight joints 5 by a heat sealing machine, and the cleaning unit 6 is attached. Formed. The space | interval of the junction parts 5 which join the fiber assembly 2 whose number is higher than each was 30 mm. The interval (L3) between the joints 5 joining the lower fiber assemblies 3 is 10 mm, and the length (L4) of the lower fiber assemblies 3 between the joints 5 is 30 mm. there were. In this way, a cleaning sheet 1A shown in FIG. 1 was obtained.

[Example 2]
The cleaning sheet 1B was manufactured using the apparatus shown in FIG. As the base sheet 4, the same one as in Example 1 was used. On one surface of the base material sheet 4, the second fiber assembly group 30 was disposed in the center portion in the Y direction, and the first fiber assembly group 20 was disposed on each outer side of the second fiber assembly group 30 in the Y direction. Each first fiber aggregate group 20 is formed by arranging five higher fiber aggregates 2 at an interval (L1) of 1 mm. The fiber assembly 2 having a higher number is the same as that of Example 1 except that the polyester short fibers are twisted together at several 300 times / m. Each second fiber aggregate group 30 is formed by arranging two lower fiber aggregates 3 at a distance (L2) of 15 mm. The fiber assembly 3 having a lower number is the same as that of Example 1, except that the polyester short fibers are twisted at several tens of turns / m. The fiber assembly 2 having a higher number and the fiber assembly 3 having a lower number are bonded to one surface of the base sheet 4 through the bonding portion 5 in the same manner as in Example 1 to form the cleaning portion 6. did. The interval between the joint portions 5 for joining the fiber assemblies 2 having higher numbers than the respective members was the same as that in Example 1. The interval (L3) between the joints 5 joining the lower fiber assemblies 3 is 15 mm, and the length (L4) of the lower fiber assemblies 3 between the joints 5 is 15 mm. there were. Thus, the cleaning sheet 1B shown in FIG. 5 was obtained.

Example 3
A cleaning sheet 1C was manufactured using the apparatus shown in FIG. As the base sheet 4, the same one as in Example 1 was used. On the one surface of the base sheet 4, five second fiber assembly groups 30 and four first fiber assembly groups 20 were alternately arranged in the X direction. As the fiber assembly 2 having a higher number, polyester short fibers having a number of 300 times / m were used. Other than that is the same as Example 1. Thus, the cleaning sheet 1C shown in FIG. 6 was obtained.

[Comparative Example 1]
The cleaning sheet of Comparative Example 1 does not have the higher number of fiber assemblies 2 and the lower number of fiber assemblies 3, and the cleaning sheet of Comparative Example 1 has a trade name “Osojojo”. -"(Seller: Daiso Sangyo Co., Ltd.) was used.

[Comparative Example 2]
The cleaning sheet of Comparative Example 1 does not have the lower number of fiber assemblies 3 and is formed by arranging only the higher number of fiber assemblies 2 on one surface of the base sheet 4. . Specifically, the cleaning sheet of Comparative Example 1 was formed by arranging 14 higher-number fiber assemblies 2 at intervals of 10 mm on one surface of the same base sheet 4 as in Example 1. Is. The fiber assembly 2 having a higher number is the same as in Example 1. In this way, a cleaning sheet of Comparative Example 1 was obtained.

[Evaluation]
The cleaning sheets obtained in the examples and comparative examples are mounted on the head part of a Quickle (registered trademark) wiper manufactured by Kao Co., Ltd. to collect cotton-like dust, granular dust, and floor The followability to the surface was evaluated by the following method. The results are shown in Table 1. As a surface to be cleaned, a wooden floor groove (National KER7UE V groove depth 1 mm, width 2 mm) was used. The dust-collecting property of the cotton-like dust was wiped back and forth four times so as to follow the cleaning surface after spraying 10 pieces of approximately spherical cotton having a diameter of 15 mm. After wiping, the cotton-like dust remaining on the cleaning surface was visually observed and judged. The dust collecting ability of the granular dust was wiped back and forth 5 times so as to follow the cleaning surface after 10 sesame grains were dispersed. After wiping, the sesame grains remaining on the cleaning surface were visually observed and judged. The number of times the cotton linter is wiped completely, with a suitable amount of cotton linter on the sliding door rail, two sets of wipes in the vertical direction of the head, and two reciprocations in the horizontal direction. This was judged by visual observation. In addition, an evaluation result is an average value of the result evaluated three times about each item using the cleaning sheet obtained by the Example and the comparative example. The evaluation criteria are as follows.

[Fabric dust collection]
◯: Collect 75% or more of cotton spread on the uneven part and its peripheral part.
Δ: Collect 50% or more of cotton spread on the uneven part and its peripheral part.
X: Collects less than 50% of cotton spread on the uneven part and its peripheral part.
[Collectability of granular dust]
○: Collect 75% or more of the sesame grains distributed on the uneven part and its peripheral part.
Δ: Collects 50% or more of the sesame grains distributed on the uneven part and its peripheral part.
X: Collects less than 50% of the sesame grains distributed on the uneven part and its peripheral part.
[Followability to the floor]
◯: Completely collects cotton linters distributed with 5 or fewer sets of wipes.
Δ: Completely collects cotton linters sprinkled with 10 sets or less of wiping.
×: Even if the number of times of wiping is 11 or more sets, the cotton linters distributed cannot be completely collected.

  As is clear from the results shown in Table 1, it can be seen that the cleaning sheets of each example have better granular dust collection and followability to the floor than the comparative cleaning sheet. On the other hand, only the cleaning sheet of Comparative Example 1 having a higher number of fiber assemblies 2 and a lower number of fiber assemblies 3 and a higher number of fiber assemblies 2 are arranged. It can be seen that the formed cleaning sheet of Comparative Example 2 is inferior in the ability to collect granular dust and the ability to follow the floor surface.

1A, 1B, 1C Cleaning sheet 2 Higher number of fiber assemblies 20 First fiber assembly group 3 Lower number of fiber assemblies 30 Second fiber assembly group 4 Base sheet 4a One side, 4b Other side 41 Flap part 5 Joining Part 6 Cleaning part 6a Side edge extending in the X direction 50 Manufacturing apparatus 1A ′ Strip-like cleaning sheet 2 ′ Long-form raw material of the higher number of fiber-like fibers 2 2A String-like higher-numbered fiber aggregate 2 Take-up roll 3 'Elongated raw material 30A of a string-like lower fiber assembly 3 30A Take-up roll of a lower-like fiber assembly 3 4' Band-shaped base sheet 40A Base sheet 4 Original roll 51 Embossing device 51a First roll 51b Anvil roll 51c Projection 52 Width direction cutting device 52a First roll 52b Anvil roll 52c Convex blade 100 Cleaning tool 101 Head 102 part 103 handle universal joint 104 sheet holding part

Claims (4)

Cleaning in which a plurality of fiber assemblies each made of a short fiber and having a different number (JIS L1095) of the short fibers are bonded to at least one surface of the base sheet via a plurality of bonding portions to form a cleaning portion. A sheet,
The plurality of joints are arranged at a predetermined interval in one direction,
Each of the plurality of fiber aggregates has a string-like shape extending in one direction and is juxtaposed, a first fiber aggregate group composed of a higher number of fiber aggregates, and a first fiber aggregate composed of a lower number of fiber aggregates. 2 fiber assembly groups,
The cleaning sheet in which the interval between the higher number of fiber assemblies in the first fiber assembly group is shorter than the interval between the lower fiber assemblies in the second fiber assembly group.   The cleaning sheet according to claim 1, wherein the number of short fibers (JIS L1095) constituting the lower-numbered fiber aggregate is 10 to 200 times / m.   The lower number of the fiber aggregate is more than the number of the gaps between the adjacent joints than the distance between the adjacent joints so as to form a loop between the adjacent joints. The cleaning sheet according to claim 1 or 2, wherein the length of the low fiber assembly is long.   The cleaning sheet according to claim 1 or 2, wherein an interval between each of the higher-numbered fiber assemblies in the first fiber assembly group is 0.01 to 2 mm.

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