Pad manufacturing method, pad manufacturing apparatus, and pad

Abstract

To provide a pad manufacturing method, pad manufacturing device and pad suppressing generation of fiber dust while having water solubility, and being integrally releasable.SOLUTION: A pad 1 includes penetration holes 1ah formed thereon. The plurality of penetration holes 1ah are formed at a peripheral edge of the pad 1 to form a binding part. Forming the binding part strengthens bond between layers around the periphery of the pad 1 to suppress generation of fiber dust. Alternatively, when, for example, the pad 1 is bonded to a toilet bowl, with a release sheet 13 peeled off and the pad 1 after the use, is removed from the toilet bowl, the pad 1 can be held integrally. Further, since a portion to be bonded to the toilet bowl, out of the pad 1 has water solubility, the pad 1 after removed from the toilet bowl can be flushed down the toilet.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a pad made of a single-layer or multiple-layer pulp fiber sheet, which is attached to a toilet bowl, for example, and absorbs water such as urine or shower water, a pad manufacturing method, a pad manufacturing device, and the pad. [Background technology]

[0002] Conventionally, water-soluble (water-decomposable) toilet sheets have been proposed. It disintegrates in water, so even if you flush it down the toilet, it won't clog the drain. The toilet sheet can be flushed down the toilet after use (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-210359 Summary of the Invention [Problem to be solved by the invention]

[0004] Toilet sheets such as those described in Patent Document 1 are manufactured by laminating fibers, and in order to ensure water-disintegratability, the fiber density is low and the fibers are weakly bonded together. As a result, problems arise such as pieces of fiber separating during use, generating dust, or the sheet separating when removed from the toilet bowl, leaving parts of it stuck to the bowl.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a method and apparatus for manufacturing a pad that is water-decomposable, suppresses the generation of fiber dust, and can be peeled off as a single unit, and the pad. [Means for solving the problem]

[0006] The pad manufacturing method disclosed herein is a method for manufacturing a water-decomposable pad comprising a pulp fiber sheet, and includes the steps of placing the raw pad sheet on a backing plate, lowering a press plate positioned above the backing plate and having a cutting blade and protrusions on the opposing surface facing the backing plate, cutting the raw pad sheet with the cutting blade to form the shape of the pad, and penetrating the protrusions into the peripheral edge of the pad to bind the peripheral edge of the pad.

[0007] According to the present disclosure, the fibers of the peripheral edge of the pad are strongly bonded and the peripheral edge is bound, thereby suppressing the generation of fiber dust and enabling the manufacture of a pad that can be peeled off as a single unit.

[0008] In the pad manufacturing method of the present disclosure, the protrusion is a pin, a perforation blade, or a lead crease.

[0009] According to the present disclosure, this can be implemented simply by adding pins, perforation blades, or lead rule blades to existing manufacturing equipment, thereby suppressing the generation of fiber dust and producing a removable pad as a single unit without incurring high manufacturing costs.

[0010] In the pad manufacturing method of the present disclosure, the press plate is lowered so that the protrusion penetrates the bottom layer of the pad and bites into the backing plate by 0.1 mm to 1.5 mm, or 0.2 to 0.5 mm.

[0011] According to the present disclosure, the pulp fibers can be entangled and bound all the way to the bottom layer of the pulp fiber sheet.

[0012] The pulp fiber sheet may be made of one or more layers, and at least one layer of the pulp fiber sheet may have water absorbency.

[0013] According to the present disclosure, for example, when the pad is attached to the toilet bowl, it is possible to prevent urination or shower water from leaking outside.

[0014] The multi-layer pulp fiber sheet includes an absorbent layer, a first surface layer formed above the absorbent layer, and a second surface layer formed below the absorbent layer, and binds the peripheral edges of the first surface layer, absorbent layer, and second surface layer.

[0015] According to the present disclosure, for example, when peeling off the pad after it has been attached to the toilet bowl, it is possible to hold it without touching the part that has absorbed urination or shower water.

[0016] The pad manufacturing method disclosed herein involves die-cutting out from the original sheet a pad that extends in a predetermined direction, has a recess formed at one end, and has a protrusion formed at the other end that has a shape corresponding to the recess, the recess and the protrusion being arc-shaped and having the same radius of curvature.

[0017] According to the present disclosure, it is possible to manufacture pads that can be fitted together without gaps when used side by side, and the positions of the two pads in the circumferential direction can be adjusted by rotating the protrusion of one pad within the recess of the other pad.

[0018] The pad manufacturing method of the present disclosure involves die-cutting the pad from the raw sheet, so that the pad extends in a predetermined direction, protrudes in a width direction intersecting the predetermined direction, and has a finger grip portion that can be pinched or hooked with fingers.

[0019] According to the present disclosure, for example, a pad can be manufactured that can be peeled off as a unit by the user pinching the finger grip portion when peeling off the pad after it has been attached to a toilet bowl.

[0020] The pad manufacturing apparatus of the present disclosure is an apparatus for manufacturing water-disintegrable pads, and includes: a backing plate on which a raw sheet of the pad is placed; a press plate disposed above the backing plate and having an opposing surface opposing the backing plate; a cutting blade provided on the opposing surface for cutting the raw sheet to cut out the pad; and a protrusion provided on the opposing surface for piercing the peripheral edge of the pad to form a binding portion.

[0021] According to the present disclosure, it is possible to manufacture a pad that is releasable as a single unit while suppressing the generation of fiber dust.

[0022] The pad of the present disclosure includes a water-decomposable pulp fiber sheet and a plurality of binding portions provided on the periphery of the pulp fiber sheet and penetrating the pulp fiber sheet.

[0023] According to the present disclosure, for example, a pad that can be attached to a toilet bowl to absorb urination or shower water and then flushed down the toilet suppresses the generation of fiber dust and can be removed as a single unit.

[0024] In the pad of the present disclosure, the binding portion includes a plurality of perforations penetrating the peripheral edge portion of the pad, and a fiber interlacing portion located between the plurality of perforations.

[0025] According to the present disclosure, this can be achieved by simply adding a pin, a perforation blade, or a lead rule blade to an existing manufacturing device, thereby suppressing the generation of fiber dust and producing a pad that can be peeled off as a single unit without incurring high manufacturing costs.

[0026] The pad of the present disclosure includes one or more layers of the pulp fiber sheet, and at least one layer of the one or more layers of the pulp fiber sheet has water absorbency.

[0027] According to the present disclosure, for example, when the pad is attached to the toilet bowl, it is possible to prevent urination or shower water from leaking outside.

[0028] The pad of the present disclosure includes a multi-layer pulp fiber sheet including an absorbent layer, a first surface layer formed above the absorbent layer, and a second surface layer formed below the absorbent layer, and the binding portion penetrates the peripheral portions of the first surface layer, the absorbent layer, and the second surface layer.

[0029] According to the present disclosure, for example, when peeling off the pad after it has been attached to the toilet bowl, it is possible to hold it without touching the part that has absorbed urination or shower water.

[0030] The pad of the present disclosure extends in a predetermined direction, has a recess formed at one end, and has a protrusion formed at the other end having a shape corresponding to the recess, the recess and the protrusion being arc-shaped, and the recess and the protrusion have the same radius of curvature.

[0031] According to the present disclosure, when multiple pads are used side by side, the two pads can be fitted together without any gaps, and the positions of the two pads in the circumferential direction can be adjusted by rotating the protrusion of one pad within the recess of the other pad.

[0032] The pad of the present disclosure extends in a predetermined direction, protrudes in a width direction intersecting the predetermined direction, and has a finger grip portion formed thereon that can be gripped or hooked with fingers.

[0033] According to the present disclosure, for example, when peeling off a pad after it has been attached to a toilet bowl, the user can pinch the finger grip portion to peel off all layers as a single unit. [Effects of the Invention]

[0034] According to the present disclosure, it is possible to manufacture a pad that is water-decomposable, suppresses the generation of fiber dust, and is removable as a single unit. [Brief explanation of the drawings]

[0035] [Figure 1] FIG. 1 is a schematic perspective view of a pad according to a first embodiment. [Figure 2] FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. [Figure 3] 2 is a schematic perspective view of a press plate and a cutting die in the pad manufacturing apparatus, viewed from below. FIG. [Figure 4] FIG. 4 is an enlarged perspective view of an area IV shown in FIG. [Figure 5] FIG. 2 is a schematic cross-sectional view showing the process of cutting a pad from an original sheet. [Figure 6] FIG. 1 is a schematic perspective view showing a pad according to a first embodiment attached to a toilet. [Figure 7] FIG. 10 is a schematic perspective view of a pad according to a second embodiment. [Figure 8] FIG. 10 is a schematic perspective view showing a state in which a plurality of pads according to a second embodiment are attached to a toilet. [Figure 9] FIG. 10 is a schematic perspective view of a pad according to a third embodiment. [Figure 10] FIG. 10 is a schematic perspective view showing a pad according to a third embodiment attached to a toilet. [Figure 11] FIG. 10 is a schematic perspective view of a pad according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0036] (Embodiment 1) The present invention will be described below with reference to the drawings showing a pad and a pad manufacturing apparatus according to embodiment 1. Fig. 1 is a schematic perspective view of the pad, and Fig. 2 is a schematic cross-sectional view taken along line II-II in Fig. 1. In the following description, the directions up, down, front, back, left, and right shown in the drawings will be used as appropriate.

[0037] As shown in Fig. 1, pad 1 has an elongated circular shape extending in the left-right direction, and is curved as a whole so as to protrude forward, forming an arc. The length of pad 1 (left-right dimension in Fig. 1) is, for example, 50 to 200 mm, the width of pad 1 (front-to-back dimension in Fig. 1) is, for example, 20 to 60 mm, and the thickness of pad 1 (top-to-bottom dimension in Fig. 1) is, for example, 3 to 15 mm.

[0038] As shown in FIG. 2, the pad 1 includes a water-absorbent layer 10, which is a layer made of a pulp fiber sheet, and two surface layers 11. The water-absorbent layer 10 contains 90 to 99 weight percent natural pulp fiber as a primary component. The water-absorbent layer 10 also contains 1 to 10 weight percent of a biodegradable plastic material, such as polylactic acid fiber and polylactic acid resin powder, as a secondary component, as a thermal adhesive (binder), and is water-absorbent, water-degradable, and biodegradable. Here, water-degradable refers to the property of disintegrating in water. Note that instead of polylactic acid fiber or polylactic acid resin powder, a biodegradable plastic material containing polyhydroxyalkanoic acid fiber or polyhydroxyalkane resin powder may be used. Furthermore, as the thermal adhesive (binder), an olefin resin material or a cyclic olefin resin material may be used within 5 weight percent, which does not inhibit the biodegradability of the pad 1.

[0039] A surface layer 11 is provided on each side of the water-absorbing layer 10. The surface layer 11 is water-decomposable and is, for example, a nonwoven fabric containing natural pulp fibers and rayon fibers.

[0040] As shown in FIG. 2, when one surface of the water-absorbing layer 10 faces upward and the other surface faces downward, an adhesive 12 is provided on the surface layer 11 disposed on the lower side. The adhesive 12 is provided discontinuously on the surface layer 11, for example, in the form of dots. Examples of the adhesive 12 include acrylic adhesives and polyvinyl acetate adhesives. For example, a biodegradable adhesive made primarily from polylactic acid or a biodegradable adhesive obtained by blending a biodegradable substance with an elastomer derived from natural rubber may be used as the adhesive 12. The adhesive 12 may also be provided continuously on the surface layer 11.

[0041] The adhesive 12 is covered with a release sheet 13. The release sheet 13 is made of, for example, paper, and is surface-treated so that it can be peeled off from the adhesive 12.

[0042] The pad 1 is manufactured using a dry nonwoven fabric manufacturing method, such as an airlaid method, as follows. A mixture of crushed natural pulp fibers, polylactic acid fibers, and polylactic acid resin powder is laminated onto the raw roll of one surface layer 11, and the raw roll of the other surface layer 11 is placed on top of it and heated. Next, a release sheet 13, which has been pre-coated with adhesive 12, is pressure-bonded to one of the surface layers 11 via the adhesive 12 to produce the raw roll S. The raw roll S is then cut into the product shape to produce the pad 1.

[0043] Considering the absorbency, strength, and thickness of the absorbent layer 10 and the surface layer 11, the pad 1 is manufactured so that the density of the absorbent layer 10 is 0.03 to 0.08 g / cm³, preferably 0.04 to 0.06 g / cm³, without the two surface layers 11, adhesive 12, and release sheet 13. The density was measured according to JIS L1913:2010 General Nonwoven Fabric Test Methods 6.1 (thickness) and 6.2 (weight per unit area). If the density is too low, it becomes difficult to maintain the product shape, while if it is too high, disintegration in water is hindered. By setting the density within the above range, it is possible to achieve both product shape retention and disintegration in water. Furthermore, the absorbent layer achieves both sufficient absorbency and strength.

[0044] From the viewpoint of flowability in the drainage pipe, the weight of the pad 1 after cutting (water absorption layer 10, surface layer 1 Pad 1 is manufactured so that the weight of pad 1 excluding release sheet 13 and adhesive 12, in other words, the product weight (under an environment of 20°C and 65% relative humidity) excluding release sheet 13 that covers adhesive 12, is 10 g or less. As will be described later, in consideration of distribution, the weight of pad 1 excluding release sheet 13 is preferably 8 g or less, more preferably 6 g or less, and even more preferably 4 g or less.

[0045] As shown in Figures 1 and 2, perforations 1ah are formed in the pad 1. A plurality of perforations 1ah are formed at regular intervals around the periphery of the pad 1 on a certain widthwise inward side from the outer edge of the pad in a plan view. Each perforation 1ah is formed in the thickness direction of the pad 1 and penetrates from the upper surface of the surface layer 11 disposed on the upper side to the lower surface of the release sheet 13. Pulp fibers around the perforations 1ah are entangled, and the pad 1 is bound by this entanglement of pulp fibers. The plurality of perforations 1ah formed in the edge portion 1e of the pad 1 and the entangled fiber portions 1ae between the perforations 1ah, where the pulp fibers are entangled, constitute the bound portion 1a. For example, in Figure 2, the hatched portions shown in the water absorbent layer 10 and the surface layer 11 represent the entangled fiber portions 1ae. The portion of the pad 1 that is radially outward of the bound portion is defined as an edge portion 1e.

[0046] The pad 1 is used by, for example, attaching it to a toilet. When disposing of the pad 1, the user lifts up all layers of the pad 1, peels it off the toilet bowl, and flushes it down the toilet. In this case, if the constant width is increased and the width of edge 1e in the radial direction of pad 1 is increased, the amount of water that edge 1e absorbs the moment it hits water when flushed down the toilet increases, making it easier for water to penetrate inside, thereby improving the water-disintegratability of pad 1. However, when removing pad 1 from the toilet bowl, there is a greater risk that only a portion of the pad will be lifted rather than the entire pad, leaving the other layer stuck to the bowl. Considering the above, to ensure water-disintegratability, the constant width is preferably 2 mm to 8 mm, but considering the risk that a portion of the pad will remain stuck to the bowl when removed, a value of 2 mm to 5 mm is more preferable.

[0047] Fig. 3 is a schematic perspective view of the press plate and cutting dies in the pad manufacturing apparatus as seen from below. Fig. 4 is an enlarged perspective view of the area shown in Fig. 3. The pad manufacturing apparatus 2 shown in the figure is used when cutting a raw sheet S to cut out pads 1. The pad manufacturing apparatus 2 includes a press plate 21, a plurality of cutting dies 22, and a backing plate 23 (see Fig. 5). The backing plate 23 is placed flat inside the pad manufacturing apparatus 2, and the press plate 21 is placed above the backing plate 23. The press plate 21 is placed so that one surface faces downward and the other surface faces upward, and a plurality of cutting dies 22 are provided on the flat surface of the lower surface. The press plate 21 is made of wood, for example.

[0048] The cutting die 22 includes a cutting blade 221, a presser rubber 222, and a lead creasing blade 223. The cutting blade 221 is a thin, circular metal blade that extends in the front-to-rear direction and is curved so as to protrude to the right. The cutting blade 221 is positioned so as to protrude downward from the lower surface of the press plate 21, forming the outermost periphery of the cutting die 22. The lead creasing blade 223 is a thin, circular metal blade that extends in the front-to-rear direction and is curved so as to protrude to the right. The lead creasing blade 223 is shaped to correspond to the binding portion of the pad 1. The lead creasing blade 223 has perforation edges 223a that form perforation holes 1ah in the pad 1 and non-perforation edges 223b that only press the pad 1 but do not form perforation holes 1ah in the pad 1, which are alternately formed at regular intervals. The lead creasing blade 223 protrudes downward from the lower surface of the press plate 21 and is positioned radially inward of the cutting die 22 by the same width. In other words, the lead ruling edge 223 forms the inner periphery of the cutting die 22. The protruding length of the perforated edge 223a from the press plate 21 is longer than the protruding length of the non-perforated edge 223b from the press plate 21. The protruding lengths of the cutting blade 221 and the perforated edge 223a from the press plate 21 are approximately the same. Instead of the lead ruler 223, a pin or a perforation blade may be provided.

[0049] The pressure rubber 222 is arranged to protrude downward from the lower plane of the press plate 21, and is fitted between the cutting blade 221 and the lead ruling blade 223. The pressure rubber is provided all around along the cutting blade 221 and the lead ruling blade 223. The protruding length of the pressure rubber 222 from the press plate 21 is approximately the same as or shorter than the protruding length of the cutting blade 221 and the lead ruling blade 223. The pressure rubber 222 may be provided only partially between the cutting blade 221 and the lead ruling blade 223.

[0050] 5 is a schematic cross-sectional view showing the process of cutting a pad from a raw sheet S. The raw sheet S is placed on a backing plate 23. The backing plate 23 is made of, for example, resin. During cutting, the press plate 21 descends, causing the cutting blade 221 and the lead ruling blade 223 to penetrate from the top surface of the raw sheet S and bite into the backing plate 23. The pressure rubber 222 presses and compresses the pad 1 in a direction intersecting the surface of the backing plate 23 to prevent the pad 1 from shifting during cutting, and the pressure rubber 222 itself is also compressed. The depth to which the cutting blade 221 and the lead ruling blade 223 bite into the backing plate 23 is 0.1 mm to 1.5 mm, and preferably 0.2 mm to 0.5 mm. If the cutting blade 221 and the lead ruling blade 223 bite into the backing plate 23 too shallowly, the cutting blade 221 may not be able to reliably cut the raw sheet S, and the lead ruling blade 223 may not reliably penetrate the pad 1. If the depth is too deep, scratches on the backing plate 23 will become larger, and the backing plate 23 will deteriorate more quickly. By setting the depth to which the cutting blade 221 and the lead ruling blade 223 bite into the backing plate 23 to the depth described above, it is possible to reliably perform cutting and penetration while suppressing deterioration of the backing plate 23. The raw roll S is cut by the press plate 21 and the cutting blade 221, and the pad 1 is punched out. In addition, the lead ruler 223 increases the pulp density around the perforation holes 1ah. As a result, the pulp fibers around the perforation holes 1ah become entangled, and the bond around the perforation holes 1ah between the surface layer 11 and the water-absorbing layer 10 becomes stronger. Note that, because the release sheet 13 is made of a material in which pulp fibers and the like are firmly consolidated, the perforation holes 1ah are formed, but the pulp fibers of the release sheet 13 and the surface layer 11 do not become entangled. The lead ruler 223 penetrates the pad 1 and forms perforation holes 1ah on the periphery of the pad 1, strengthening the bond between the pulp fibers on the periphery and binding the periphery of the pad 1. By binding the periphery of the pad 1, the release of fiber fragments inside to the outside and the generation of dust are suppressed, and the pad 1 is processed to make it less susceptible to delamination.

[0051] FIG. 6 is a schematic perspective view of the pad according to the first embodiment attached to a toilet. The toilet 3 comprises a toilet bowl 31, a toilet seat 32, and a toilet lid 33. The toilet bowl 31 is a Western-style toilet bowl with an opening 3a at the top. The top surface (upper edge of the toilet bowl) 3b that borders the opening 3a is annular in plan view and forms a flat surface. The front part of the upper edge 3b is arc-shaped and band-shaped in plan view. A pivot 310 with its axial length in the left-right direction is provided at the rear of the toilet bowl 31.

[0052] The toilet seat 32 is an O-shaped toilet seat. The toilet seat 32 is in the shape of a ring-shaped plate. A hole 320 is provided corresponding to the opening 3a. The rear of the toilet seat 32 is pivoted via a pivot 310. The toilet seat 32 is rotatably supported on the toilet bowl 31. Therefore, the front part of the toilet seat 32 can be raised and lowered. By lifting the handle, the toilet seat can be swung around the pivot 310. When using the toilet 3, the toilet seat 32 is raised.

[0053] The toilet lid 33 is an egg-shaped plate that covers the toilet seat 32. The rear of the toilet lid 33 is pivoted by a pivot 310. Therefore, when the front part of the toilet lid 33 is lowered, the lower The toilet seat 32 is covered by the toilet lid 33 that has been swung toward the toilet seat. When this occurs, the toilet lid 33 swings upward and separates from the toilet seat 32.

[0054] When a person sits on the toilet seat 32 to use the toilet 3, the toilet seat 32 is lowered. When the toilet seat 32 is in the closed position, the upper surface of the toilet seat 32 is the seat surface, and the lower surface is the toilet seat back 32a. 2a has four elastic protrusions 321. The back surface 32a and the upper edge 3b of the toilet bowl are arranged to face each other. b to support the toilet seat 32. The elastic protrusions 321 are attached to the toilet seat back 32a except for the front and rear portions. Two of them are arranged on the left and right sides of the toilet seat back 32a.

[0055] With the release sheet 13 removed, the pad 1 is attached, for example, to the front of the upper edge 3b of the toilet bowl with the adhesive 12 facing downward. The pad 1 is attached to the upper edge 3b of the toilet bowl with the curvature of the pad 1 corresponding to the curvature of the upper edge 3b. In Figure 6, one pad 1 is attached to the upper edge 3b of the toilet bowl. The width of the pad 1 (the dimension in the radial direction of the toilet bowl) is approximately the same as the width of the upper edge 3b of the toilet bowl (the dimension in the radial direction of the toilet bowl), and the pad 1 covers the entire upper edge 3b of the toilet bowl in the width direction. It is preferable that the pad 1 be positioned in a location that is not sandwiched between the elastic protrusion 321 and the upper edge 3b of the toilet bowl. The attachment position of the pad 1 is not limited to the upper edge 3b of the toilet bowl, and it may be provided, for example, on the outer peripheral surface (side surface) of the toilet bowl 31.

[0056] An elastic protrusion 321 is interposed between the toilet seat back 32a of the lowered toilet seat 32 and the toilet upper edge 3b. The thickness (vertical dimension) of the pad 1 is approximately the same as this gap or Therefore, when the toilet seat 32 is lowered, the toilet bowl upper edge 3b is in front of the toilet. The gap is then filled by the pad 1. In other words, The pad 1 is manufactured to have a thickness of 100 mm. By providing the pad 1 in the gap, It is possible to prevent urination or shower water from leaking out from between the toilet bowl 31 and the toilet seat 32. In addition, by providing the pad 1 on the outer peripheral surface of the toilet bowl 31, it is possible to prevent water from entering the toilet bowl, such as when urinating or showering. This can prevent the dirt from running down the outer periphery and adhering to the floor.

[0057] Furthermore, when a man lifts the toilet seat 32 and uses the toilet in a standing position, dripping urine can be prevented from getting on the toilet bowl.

[0058] After the pad 1 has absorbed the urination or shower water, the user disposes of the pad 1. At this time, the user peels the pad 1 off the upper edge 3b of the toilet bowl and flushes it down the toilet.

[0059] (Embodiment 2) The following describes the differences between the pad according to embodiment 2 and embodiment 1. Except for the configurations described below, the configurations are the same as those of embodiment 1. Therefore, the components that are the same as those of embodiment 1 are given the same reference numerals as those of embodiment 1, and descriptions of those components will be omitted. Fig. 7 is a schematic perspective view of a pad according to embodiment 2. As shown in Fig. 7, a recess 1b is formed at one end of the pad 1 according to embodiment 2. The recess 1b is arc-shaped in a plan view and is recessed toward the other end of the pad 1. The edge portion of the other end of the pad 1 is recessed in the recess 1b. The one end has a shape that follows the shape of the other end, and in a plan view, forms an arc shape that protrudes toward the opposite side of the one end. Hereinafter, the other end of the pad 1 is also referred to as the protrusion 1c. The radius of curvature of the protrusion 1c and the radius of curvature of the recess 1b are The radius is approximately the same. The recesses 1b and the protrusions 1c are formed when the pad 1 is cut out from the raw sheet S by forming a cutting die 22 in a shape corresponding to the recesses 1b and the protrusions 1c.

[0060] 8 is a schematic perspective view of a plurality of pads according to embodiment 2 attached to a toilet. The pad 1 is attached with the release sheet 13 removed, the adhesive 12 facing downward, and the recess 1b facing right. The pad 1 is attached to the front of the upper edge 3b of the toilet bowl with the protrusion 1c facing left. Before bonding, the protrusion 1c of one pad 1 is aligned with the recess 1b of the other pad 1. By rotating the pads 1 within the grooves, the positions of the two pads 1 in the circumferential direction can be adjusted.

[0061] In FIG. 8, two pads 1 are attached to the upper edge 3b of the toilet bowl. The two pads 1 are aligned in the circumferential direction of the opening 3a, with the curves corresponding to the curves of the upper edge 3b of the toilet bowl. The protrusion 1c of one pad 1 is fitted into the recess 1b of the other pad 1. The recess 1b and the protrusion 1c that are joined together are arranged to control the direction of splashing of urination or shower water, in other words, the direction of splashing of urination or shower water. In the radial direction of the container 31, they overlap and are connected without any gaps. 1 may be attached to the upper edge 3b of the toilet bowl.

[0062] By using multiple pads 1, you can arrange the pads 1 over the entire water splash area. This prevents water from splashing over a wide area. As a result, in the direction of water splashing, in other words, in the radial direction of the opening 3a, the protrusion 1 The recesses 1c and 1b overlap and are connected without any gaps, and water flows out from the connecting portion of the two adjacent pads 1. It is possible to prevent leakage.

[0063] In addition, since there is only one recess 1b and one protrusion 1c, when connecting two pads 1, positioning is easy. Furthermore, by forming the recess 1b into an arc shape in a plan view, the recess 1b and the protrusion 1c can be smoothly fitted together. This can be achieved.

[0064] (Embodiment 3) The following describes the differences between the pad according to embodiment 3 and embodiment 1. Except for the configurations described below, the configurations are the same as those of embodiment 1. Therefore, the components that are the same as those of embodiment 1 are given the same reference numerals as those of embodiment 1, and the description of those components will be omitted. Fig. 9 is a schematic perspective view of a pad according to embodiment 3. As shown in Fig. 9, finger holding portions 1d are formed on both left and right ends of the pad 1 so as to protrude forward. Each finger holding portion 1d is formed by all layers constituting the pad 1 being integrally protruding. The finger-holding portion 1d is formed when the pad 1 is cut out from the raw sheet S by forming a cutting die 22 into a shape corresponding to the finger-holding portion 1d.

[0065] Fig. 10 is a schematic perspective view of the pad according to embodiment 3 attached to the toilet. As shown in Fig. 10, the finger grip portion protrudes forward from the upper edge 3b of the toilet bowl, i.e., toward the outside of the toilet bowl 31. When removing the pad 1 that has become soiled due to moisture absorption from the toilet bowl 31, the user can grasp one of the finger grip portions 1d with the fingers and lift it up to peel off the adhesive from the upper edge of the toilet bowl.

[0066] When removing the pad 1 from the toilet bowl as described above, the user does not need to touch the toilet bowl 31 in order to grasp the pad 1. Furthermore, by grasping the finger grip, the entire layer of the pad 1 can be peeled off from the toilet bowl 31 as a unit, preventing any part of the pad 1 from remaining attached to the toilet bowl 31.

[0067] (Variation) The recessed portion 1b, the protruding portion 1c, and the finger holding portion 1d may be simultaneously formed on the pad 1. Fig. 11 is a schematic perspective view of a pad 1 according to a modified example. In this case, the finger holding portion 1d is formed at a position or in a shape that does not interfere with the fitting of the recessed portion 1b and the protruding portion 1c when multiple pads 1 are arranged side by side.

[0068] In the above-described embodiment, the pad 1 has a three-layer structure with the water-absorbing layer 10 and the surface layers 11 above and below the water-absorbing layer 10, but this is not limiting. For example, the pad 1 may have a single-layer structure with only the water-absorbing layer 10, or a two-layer structure with the surface layer 11 on either the upper or lower side of the water-absorbing layer 10. Furthermore, the pad 1 may have a four-layer or more layer structure.

[0069] The pads according to the embodiments are not limited to pads that are attached to toilets. For example, absorbent pads for feminine panty liners may be manufactured. In this case, however, the pads are not arc-shaped, but are formed in, for example, a substantially rectangular or oval shape.

[0070] The disclosed embodiments 1, 2 and 3 are illustrative in all respects and should not be considered limiting. The scope of the present invention is defined not by the above meaning but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. [Explanation of symbols]

[0071] 1 pad 10 Water absorption layer 11 Surface layer 12 Adhesive 13 Peel-off sheet 1a Binding section 1ah through hole 1ae Fiber entanglement part 1b Recess 1c protrusion 1d finger holder 1e Edge 2 Pad manufacturing equipment 21 Press Plate 22 Cutting mold 221 Cutting blade 222 Rubber 223 Lead ruler 23 Receiving plate 3. Toilet S Original fabric

Claims

1. A method for manufacturing a pad having a pulp fiber sheet and having water-decomposability, placing the raw sheet of the pad on a backing plate; a step of lowering a press plate disposed above the backing plate and having a cutting blade and a protrusion on a surface facing the backing plate; a step of cutting the raw sheet with the cutting blade to form a shape of the pad; a step of penetrating the protrusions into the peripheral edge portion of the pad and binding the peripheral edge portion of the pad; A method for manufacturing a pad comprising:

2. The protrusion is a pin, a perforation blade, or a lead crease. A method for manufacturing the pad according to claim 1.

3. The press plate is lowered so that the protrusion penetrates the bottom layer of the pad and bites into the backing plate by 0.1 mm to 1.5 mm, or 0.2 to 0.5 mm. A method for manufacturing the pad according to claim 1 or 2.

4. The pad includes a single layer or multiple layers of the pulp fiber sheet, and at least one layer of the single layer or multiple layers of the pulp fiber sheet has water absorbency. Manufacture A method for manufacturing the pad according to any one of claims 1 to 3.

5. The pulp fiber sheet of the plurality of layers is A water absorption layer; a first surface layer formed on the upper side of the water absorption layer; a second surface layer formed below the water absorption layer; The peripheral edges of the first surface layer, the water absorption layer, and the second surface layer are bound together. A method for manufacturing the pad according to any one of claims 1 to 3.

6. Extends in a predetermined direction, A recess is formed at one end, A protrusion having a shape corresponding to the recess is formed on the other end, The recess and the protrusion are arc-shaped, The pad has the same radius of curvature of the recess and the protrusion, Cut out from the original roll A method for manufacturing the pad according to any one of claims 1 to 5.

7. Extends in a predetermined direction, The pad has a finger grip portion formed thereon that projects in a width direction intersecting the predetermined direction and that can be pinched or put with fingers, Cutting out the die from the raw material. A method for manufacturing the pad according to any one of claims 1 to 5.

8. A manufacturing apparatus for water-decomposable pads, a receiving plate on which the raw sheet of the pad is placed; a press plate disposed above the backing plate and having an opposing surface facing the backing plate; a cutting blade provided on the opposing surface for cutting the raw sheet to cut out the pad; a protrusion provided on the opposing surface, penetrating a peripheral edge of the pad to form a binding portion; A pad manufacturing apparatus comprising:

9. a water-decomposable pulp fiber sheet; a plurality of binding portions provided on the peripheral edge of the pulp fiber sheet and penetrating the pulp fiber sheet; Equipped with The binding portion is a plurality of perforations penetrating a peripheral edge portion of the pulp fiber sheet; a fiber entanglement portion that is located between the plurality of perforations and is compressed in the thickness direction and in which fibers are entangled; Equipped with pad.

10. a water-decomposable pulp fiber sheet; a plurality of binding portions provided on the peripheral edge of the pulp fiber sheet and penetrating the pulp fiber sheet; Equipped with The pulp fiber sheet of the plurality of layers is A water absorption layer; a first surface layer formed on the upper side of the water absorption layer; a second surface layer formed below the water absorption layer, The binding portion penetrates the peripheral edge portions of the first surface layer, the water absorption layer, and the second surface layer. pad.

11. a water-decomposable pulp fiber sheet; a plurality of binding portions provided on the peripheral edge of the pulp fiber sheet and penetrating the pulp fiber sheet; Equipped with Extends in a predetermined direction, The whole is formed in a curved arc, A recess is formed at one end, A protrusion having a shape corresponding to the recess is formed on the other end, The recess and the protrusion are arc-shaped, The concave and convex portions have the same radius of curvature. pad.

12. a water-decomposable pulp fiber sheet; a plurality of binding portions provided on the peripheral edge of the pulp fiber sheet and penetrating the pulp fiber sheet; Equipped with Extends in a predetermined direction, A finger grip portion is formed that protrudes in a width direction intersecting the predetermined direction and can be pinched or finger-hooked, When attached to a toilet, the finger grip portion protrudes outside the toilet bowl. pad.

13. The binding portion is a plurality of perforations extending through a peripheral edge of the pad; a fiber entanglement portion located between the plurality of perforations; 13. A pad according to any one of claims 10 to 12, comprising:

14. A single layer or multiple layers of the pulp fiber sheet are provided, At least one layer of the pulp fiber sheet (single layer or multiple layers) has water absorbency. A pad according to any one of claims 9 to 13.

15. The pulp fiber sheet of the plurality of layers is A water absorption layer; a first surface layer formed on the upper side of the water absorption layer; a second surface layer formed below the water absorption layer, The binding portion penetrates the peripheral edge portions of the first surface layer, the water absorption layer, and the second surface layer.

13. A pad according to any one of claims 9, 11 or 12.

16. Extends in a predetermined direction, A recess is formed at one end, A protrusion having a shape corresponding to the recess is formed on the other end, The recess and the protrusion are arc-shaped, The concave and convex portions have the same radius of curvature.

13. A pad according to any one of claims 9, 10 or 12.

17. Extends in a predetermined direction, A finger grip portion is formed that projects in a width direction intersecting the predetermined direction and can be pinched or put with fingers. A pad according to any one of claims 9 to 11.

Images