JP7169692B2 - Pads and pad sets - Google Patents

Description

The present technology relates to pads and pad sets that are attached to, for example, toilet bowls and absorb water such as flush water or shower water.

Conventionally, a single water absorbing sheet is provided between the upper edge of the toilet bowl and the toilet seat to prevent splashed water, such as small water or shower water for washing, from leaking from between the toilet bowl and the toilet seat. (See, for example, Patent Document 1).

Utility Model Registration No. 3189052

However, when water splashes over a wide area, there is a possibility that a single water absorbing sheet cannot prevent water leakage.

The present disclosure has been made in view of such circumstances, and an object thereof is to provide a pad and a pad set that can prevent water leakage even when water splashes over a wide area.

A pad according to an embodiment of the present disclosure is a pad that extends in a predetermined direction and has a recess formed at one end and a protrusion having a shape corresponding to the recess formed at the other end.

In one embodiment of the present disclosure, when a plurality of pads are prepared and arranged in a predetermined direction, one protrusion of two adjacent pads can be fitted into the other recess. When the protrusion and the recess are arranged on the same plane and fitted together, no gap is formed between the protrusion and the recess when viewed from a direction parallel to the plane.

In the pad according to an embodiment of the present disclosure, each of the concave portion and the protrusion is singular.

In one embodiment of the present disclosure, there is only one recess and protrusion, which facilitates positioning when connecting two pads.

In the pad according to one embodiment of the present disclosure, the concave portion and the protrusion are arcuate, and the concave portion and the protrusion have the same radius of curvature.

In one embodiment of the present disclosure, the two pads are fitted without a gap by forming the concave portion and the protrusion in an arc shape and making the radius of curvature of the concave portion and the protrusion the same. Further, it is easy to adjust the positions of the two pads in the circumferential direction by rotating the protrusion of one pad within the recess of the other pad.

In a pad according to an embodiment of the present disclosure, the curvature of the concave portion is less than or equal to a predetermined curvature.

In one embodiment of the present disclosure, when using two pads, the protrusion of one pad is arranged in the recess of the other pad by setting the curvature of the recess to be less than or equal to a predetermined curvature. Alternatively, when performing position adjustment in the circumferential direction of the projection, the adjustable range without interference is increased.

A pad according to an embodiment of the present disclosure has a plurality of recesses and protrusions.

In one embodiment of the present disclosure, a plurality of protrusions can be fitted into the plurality of recesses to form a labyrinth at the connecting portion between two adjacent pads.

A pad according to an embodiment of the present disclosure has a water-absorbing layer, surface materials arranged on both sides of the water-absorbing layer, and an adhesive arranged on one of the surface materials. , the weight of the water absorbing layer, the surface material and the adhesive is 10 g or less;

In one embodiment of the present disclosure, the flowability of the pad is ensured within the drainpipe.

A pad set according to an embodiment of the present disclosure is a pad set having a plurality of pads extending in a predetermined direction, in which a recess is formed at one end of the pad, and a shape corresponding to the recess is formed at the other end of the pad. and a protrusion of one of the pads is fitted into the recess of one of the pads.

In one embodiment of the present disclosure, a plurality of pads can be arranged in a predetermined direction, and one protrusion of two adjacent pads can be fitted into the other recess. The protrusion and the recess overlap in the direction of water splash.

In the pad according to an embodiment of the present disclosure, when a plurality of pads are arranged, the protrusions and recesses of adjacent pads are fitted, the protrusions and recesses are arranged on the same surface, and fitted, When viewed from a direction parallel to the surface, no gap is formed between the protrusion and the recess. Therefore, it is possible to dispose the pads over the entire water scattering range and prevent water from leaking from the connecting portions of the pads.

It is a schematic representation perspective view of a pad. FIG. 2 is a schematic cross-sectional view in which the II-II line shown in FIG. 1 is taken as a cutting line; It is a schematic diagram which briefly shows the structure of a water absorption layer. 1 is a schematic perspective view of a toilet with multiple pads attached; FIG. It is a schematic diagram which briefly shows the structure of the flow-ability test apparatus by a Tosa method. FIG. 10 is a table showing the total number of tests N, the DC value for each of the specimens with different weights; FIG. It is a graph which shows the DC value with respect to the weight of a test piece. FIG. 8 is a schematic plan view of a pad according to Embodiment 2; FIG. 4 is a schematic plan view showing a state in which two pads are connected; FIG. 11 is a schematic plan view of a pad according to a modification; FIG. 11 is a schematic plan view of a pad according to a modification;

(Embodiment 1)
The present invention will be described below with reference to the drawings showing the pad according to the first embodiment. 1 is a schematic perspective view of the pad, FIG. 2 is a schematic cross-sectional view taken along line II-II shown in FIG. 1, and FIG. 3 is a schematic diagram schematically illustrating the structure of the water absorbing layer.

As shown in FIG. 1, the pad 1 is arcuate and belt-shaped in plan view. The length of the pad 1 (horizontal dimension in FIG. 1) is, for example, 50 to 200 mm, the width of the pad 1 (front and rear dimension in FIG. 1) is, for example, 20 to 60 mm, and the thickness of the pad 1 (vertical dimension in FIG. dimension) is, for example, 3 to 15 mm. A concave portion 1 a is formed at one end of the pad 1 . The concave portion 1 a has an arc shape in plan view and is recessed toward the other end portion of the pad 1 . The edge portion of the other end of the pad 1 has a shape following the concave portion 1a, and has an arc shape protruding toward the opposite side of the one end in plan view. Hereinafter, the other end portion of the pad 1 is also referred to as a protrusion 1b. The radius of curvature of the protrusion 1b and the radius of curvature of the recess 1a are substantially the same. Note that the pad 1 may be formed in a rectangular shape in plan view.

As shown in FIG. 2, the pad 1 comprises a water-absorbing layer 10, two surface materials 11, an adhesive 12 and a release paper 13. As shown in FIG. The water absorbing layer 10 is a nonwoven fabric having natural pulp fibers and a biodegradable plastic material containing polylactic acid fibers and polylactic acid resin powder. The absorbent layer 10 comprises 90-99 weight percent natural pulp fibers and 1-10 weight percent biodegradable plastic material. For example, as shown in FIG. 3, the water absorbing layer 10 is a nonwoven fabric comprising natural pulp fibers 10a, polylactic acid fibers 10b, and polylactic acid resin powder 10c. The polylactic acid fiber 10b is designed so that the average length of the polylactic acid fiber 10b is longer than that of the natural pulp fiber 10a, forming a very rough skeleton. A biodegradable plastic material containing polyhydroxyalkanoic acid fiber or polyhydroxyalkane resin powder may be used instead of polylactic acid fiber 10b or polylactic acid resin powder 10c.

Natural pulp fibers 10a are arranged inside the skeleton. The density of the natural pulp fibers 10a is coarse. Polylactic acid connects the polylactic acid fibers 10b, the polylactic acid fibers 10b and the natural pulp fibers 10a, or the natural pulp fibers 10a. A soft cotton-like non-woven fabric is formed from the natural pulp fibers 10a, the polylactic acid fibers 10b, and the polylactic acid resin powder 10c. All of the natural pulp fibers 10a, the polylactic acid fibers 10b, and the polylactic acid resin powder 10c are water-degradable and biodegradable. Here, the term "water disintegratability" refers to the property of disintegrating in water. Henceforth, water-disintegratability is also called disintegratability. Biodegradability refers to the ability of a compound to be broken down by bacteria, fungi, and other organisms.

A surface material 11 is provided on each of both surfaces of the water absorbing layer 10 . The surface material 11 has water decomposability. The surface material 11 is, for example, a non-woven fabric comprising natural pulp fibers and rayon fibers. Natural pulp fibers and rayon fibers are biodegradable.

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 material 11 arranged on the lower side. The adhesive 12 is arranged discontinuously on the surface material 11, for example, in dots. Examples of the adhesive 12 include an acrylic adhesive or a polyvinyl acetate adhesive. As the adhesive 12, for example, a biodegradable pressure-sensitive adhesive mainly made of polylactic acid or a biodegradable pressure-sensitive adhesive obtained by blending a biodegradable substance with an elastomer derived from natural rubber may be used. . Note that the adhesive 12 may be provided continuously on the surface material 11 .

The adhesive 12 is covered with a release paper 13 . The release paper 13 is made of paper, for example, and is surface-treated so that it can be separated from the adhesive 12 .

The pad 1 is manufactured as follows using a dry nonwoven fabric manufacturing method such as an airlaid method. Crushed natural pulp fibers 10a, polylactic acid fibers 10b, and polylactic acid resin powder 10c are mixed on the raw material of one surface material 11, laminated and molded, and the raw material of the other surface material 11 is placed on the upper surface. The rolls are piled up and heat-molded to form the pad 1 . Next, a release paper 13 coated with an adhesive 12 in advance is pressure-bonded to one of the surface members 11 via the adhesive 12, and cut into a product shape. The manufacturing method of the pad 1 is not limited to the airlaid method. Also, the adhesive 12 and release paper 13 may be omitted.

From the viewpoint of water absorption, strength, thickness, etc. of the water absorbing layer 10 and the surface material 11, the density of the water absorbing layer 10 and the two surface materials 11 is 0.03 in the state where the adhesive 12 and the release paper 13 are not provided. The pad 1 is manufactured to have a weight of ~0.08 g/cm ³ , preferably 0.04-0.06 g/cm ³ . The pad 1 is manufactured so that the weight of the cut pad 1 is 10 g or less from the viewpoint of flowability in the drain pipe. The density was measured in accordance with 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 will be difficult to maintain the shape of the product, and if it is too high, disintegration in water will be hindered. By setting the density within the above range, it is possible to achieve both retention of product shape and disintegration in water. In addition, the water absorbing layer has both sufficient water absorption and strength.

From the viewpoint of flowability in the drain pipe, the weight of the pad 1 after cutting (the weight of the water absorbing layer 10, the surface material 11 and the adhesive 12, in other words, the product weight excluding the release paper 13 covering the adhesive 12 (20 C., 65% relative humidity)) is 10 g or less. As will be described later, the weight of the pad 1 excluding the release paper 13 is preferably 8 g or less, more preferably 6 g or less, and even more preferably 4 g or less in consideration of flowability.

FIG. 4 is a schematic perspective view of a toilet with a plurality of pads 1 attached. The toilet 2 includes a toilet bowl 21 , a toilet seat 22 and a toilet lid 23 . The toilet bowl 21 is a Western-style toilet bowl and has an opening 2a at the top. An upper surface (toilet upper edge) 2b bordering the opening 2a forms a ring shape in plan view and forms a flat surface. The front portion of the upper edge 2b of the toilet bowl is arcuate and strip-shaped in plan view. A pivot shaft 210 is provided at the rear portion of the toilet bowl 21, with the left-right direction as the axial direction.

The toilet seat 22 is an O-shaped toilet seat. The toilet seat 22 has an annular plate shape. A hole 220 is provided in the central portion of the toilet seat 22 corresponding to the opening 2a. A rear portion of the toilet seat 22 is rotatably supported by the toilet bowl 21 via a pivot 210 . Therefore, the toilet seat 22 can swing around the pivot 210 by raising and lowering the front portion of the toilet seat 22 . When using the toilet 2 in a standing posture facing the toilet bowl 21, the toilet seat 22 is raised.

When sitting on the toilet seat 22 and using the toilet 2, the toilet seat 22 is lowered. When the toilet seat 22 is lowered, the upper surface of the toilet seat 22 is the seat surface, and the lower surface is the toilet seat back 22a. Four elastic projections 221 are provided on the toilet seat back 22a. Therefore, the seat back 22a of the lowered toilet seat 22 and the upper edge 2b of the toilet are arranged to face each other. At this time, the elastic protrusions 221 contact the upper edge 2b of the toilet bowl and support the toilet seat 22. As shown in FIG. Two elastic protrusions 221 are arranged on each of the left and right portions of the toilet seat back 22a, excluding the front and rear portions of the toilet seat back 22a.

With the release paper 13 removed, the pad 1 is attached to the front part of the upper rim 2b of the toilet bowl with the adhesive 12 facing downward, the concave portion 1a facing right, and the protrusion 1b facing left. The pad 1 is adhered to the upper edge 2b of the toilet bowl. Before bonding, the positions of the two pads 1 in the circumferential direction can be adjusted by rotating the protrusion 1b of one pad 1 within the recess 1a of the other pad 1. FIG.

The width of the pad 1 (dimension in the radial direction of the toilet bowl 21) is substantially the same as the width of the upper edge 2b of the toilet bowl (dimension in the radial direction of the toilet bowl 21). cover. It is preferable that the pad 1 is arranged at a place where it is not sandwiched between the elastic projection 221 and the upper edge 2b of the toilet bowl. The attachment position of the pad 1 is not limited to the upper edge 2b of the toilet bowl, and may be provided on the outer peripheral surface (side surface) of the toilet bowl 21, for example.

Since the elastic projection 221 is interposed between the toilet seat back 22a of the lowered toilet seat 22 and the upper edge 2b of the toilet bowl, a gap is generated. The thickness (vertical dimension) of the pad 1 is substantially the same as this gap or slightly thicker than this gap. Therefore, when the toilet seat 22 is lowered, the gap is closed by the pad 1 at the front portion of the upper edge 2b of the toilet bowl. In other words, the pad 1 is manufactured so as to have a thickness that can close the gap. By providing the pad 1 in the gap, small water or shower water can be prevented from leaking from between the toilet bowl 21 and the toilet seat 22 . Further, by providing the pad 1 on the outer peripheral surface of the toilet bowl 21, it is possible to prevent small water or shower water from running along the outer peripheral surface and adhering to the floor.

The toilet lid 23 has an oval plate shape that covers the toilet seat 22 . A rear portion of the toilet lid 23 is rotatably supported by the toilet bowl 21 via a pivot 210 . Therefore, when the front portion of the toilet lid 23 is lowered, the toilet seat 22 is covered by the downwardly swung toilet lid 23 . On the other hand, when the front portion of the toilet lid 23 is lifted, the toilet lid 23 swings upward and separates from the toilet seat 22 .

In FIG. 4, two pads 1 are attached to the toilet upper edge 2b. The two pads 1 are arranged in the circumferential direction of the opening 2a so that the curvature of the pad 1 corresponds to the curvature of the upper edge 2b of the toilet bowl. The protrusion 1b of one pad 1 is fitted into the recess 1a of the other pad 1. As shown in FIG. The recessed portion 1a and the projecting portion 1b that are fitted overlap each other in the scattering direction of small water or cleansing shower water, in other words, in the radial direction of the toilet bowl 21, and are connected without a gap. Three or more pads 1 may be attached to the upper edge 2b of the toilet bowl.

By using a plurality of pads 1, it is possible to arrange the pads 1 over the entire range of water splashing and prevent wide-range water splashing. By fitting the protrusion 1b into the recess 1a, the protrusion 1b and the recess 1a overlap each other in the direction in which water scatters, in other words, in the radial direction of the opening 2a. It is possible to prevent water from leaking from one connection portion.

In addition, since there is only one concave portion 1a and one protrusion 1b, positioning becomes easy when two pads 1 are connected. Further, by forming an arc shape in a plan view, it is possible to achieve smooth fitting between the concave portion 1a and the projecting portion 1b.

The water disintegratability (disintegratability) of the pad 1 will be described. The water disintegrability of Pad 1 was confirmed based on the guidelines (Edition 4 of the Guidelines for Assessing the Flush ability of Disposable Nonwoven Products) established by EDANA (European Disposables And Nonwovens Association).

Specifically, a slosh box disintegration test was performed. In the slosh box disintegration test, 2 liters of water and a test piece are placed in a given box, and the box is rotated at a rotation speed of 26 rpm for 60 minutes. Thereafter, the residue remaining in the strainer is dried through a strainer having a plurality of holes with a diameter of 12.5 mm, and the ratio of the residue to the weight of the test piece before input is determined. If this ratio is less than 35%, it has sufficient disintegration properties and can be flushed down the drain. The test piece this time is the pad 1 excluding the release paper 13 . As will be described later, it was determined that the test piece had sufficiently disintegrated after 30 minutes had passed, so the rotation time was set to 30 minutes.

The above disintegration test was performed three times. The weight of each pad 1 before being put in is 3.94 g. The first test gave a dry weight of residue left on the strainer of 0.27 g, the second test gave a dry weight of residue left on the strainer of 0.27 g, the third test test, the dry weight of the residue left on the strainer was 0.08 g. When converted to the above ratio, the first ratio is 0.27/3.94 = 6.85%, the second ratio is 0.27/3.94 = 6.85%, and the third ratio is The ratio was 0.08/3.94=2.03%. In all tests, the ratio was less than 35%, indicating sufficient disintegration. According to the guideline, the box should be rotated for 60 minutes, but in the test for Pad 1 this time, it was possible to meet the above criteria by rotating it for only half, 30 minutes.

Next, the fluidity test of the pad 1 will be explained. FIG. 5 is a schematic diagram schematically showing the configuration of a flowability testing apparatus according to the Tosa method used at the Kochi Prefectural Paper Industry Technology Center. The fluidity of the pad 1 will be explained. The flowability of Pad 1 was confirmed based on the product evaluation system (Tosa method) that can be flushed down the toilet. Specifically, the test was conducted using the flowability testing apparatus shown in FIG.

The fluidity testing apparatus includes a water-saving type II toilet bowl C910S (hereinafter referred to as toilet bowl 3 ), a first drain pipe 4 , a second drain pipe 5 and a third drain pipe 6 . The amount of flushing water per flush of the toilet bowl 3 is 3.8 liters assuming the amount of flushing water of a super water-saving toilet. The first drain pipe 4 has a length of 30 cm and a nominal diameter of 75 mm, and extends vertically downward from the toilet bowl 3 . The second drain pipe 5 has a length of 1 m, a nominal diameter of 75 mm, and extends horizontally. The second drain pipe 5 is connected to the first drain pipe 4 via a right angle elbow with a slope of 1/100. The third drain pipe 6 is composed of a plurality of drain pipes and sockets. The third drain pipe 6 has a length of 10 m, a nominal diameter of 100 mm, and extends horizontally. The third drain pipe 6 is connected to the second drain pipe 5 at a slope of 1/100 via a right angle elbow and a VU reducing socket. The third drain pipe 6 may be composed of a single drain pipe.

The flowability test was conducted based on the Tosa method test method using a testing machine at the Paper Industry Technology Center. The washing operation is performed on the toilet bowl 3 continuously for a predetermined number of times. A given number of washes is counted as one test. This time, the maximum number of consecutive washings of four times was defined as one test number. If the test piece is discharged from the fluidity test device by washing less than 4 times, that is, if it is discharged from the third drain pipe 6, no further washing is necessary. was counted as one test. For example, when the test piece was ejected from the fluidity testing device by washing twice in succession, washing twice was counted as one test.

In the fluidity test, a DC (Drained or Clogged value) value (%) is determined. A DC value is calculated by the following formula.
DC value = (number of dwells/total number of tests) x 100
The number of stays refers to the number of times the test piece stays in the drainage pipe of the fluidity tester.

FIG. 6 is a table showing the total number of tests, N, and the DC value for each of the specimens with different weights. In FIG. 6, the weight indicates the weight (g) of the test piece, and the 1st to 4th washings indicate the order of the maximum number of consecutive 4 washings.

In the test using one specimen weighing 2.1 g, the total number of tests is 8, the DC value in the first wash is 37.5% and the DC value in the second wash is 0%. That is, a test piece with a weight of 2.1 g is discharged from the fluidity tester after washing twice or less.

In the test using one specimen weighing 2.8 g, the total number of tests is 6, the DC value in the first wash is 50% and the DC value in the second wash is 0%. That is, within two washes, a test piece with a weight of 2.8 g is discharged from the fluidity tester.

In the test using one specimen weighing 3.4 g, the total number of tests is 8, the DC value in the first wash is 75% and the DC value in the second wash is 0%. That is, a test piece with a weight of 3.4 g is discharged from the fluidity tester after washing two times or less.

In the test using one test piece weighing 4.2 g, the total number of tests was 50, the DC value in the first wash was 96%, the DC value in the second wash was 18%, and the surface was washed three times. The DC value in the wash is 4% and the DC value in the 4th wash is 2%.

In the tests using the 8.5 g weight specimens, two 4.2 g weight specimens were used. In this test, the total number of tests was 10, the DC value in the 1st wash was 100%, the DC value in the 2nd wash was 80%, the DC value in the 3rd wash was 20%, the 4th wash was The DC value in the wash is 10%.

In the test using the 12.7 g weight specimen, three 4.2 g weight specimens were used. In this test, the total number of tests is 5, the DC value is 100% for the first 3 washes, and the DC value is 80% for the 4th wash.

The retention of the pad 1 shown in the above test results is all seen in the third drain pipe 6 in FIG. It was easily distributed and no retention was observed.

FIG. 7 is a graph showing the DC value against the weight of the test piece. In FIG. 7, white circles represent test results of a test piece weighing 2.1 g, white triangles represent test results of a test piece weighing 2.8 g, and white squares represent test results of a test piece weighing 3.4 g. , The black circles are the test results of the test piece weighing 4.2 g, the cross marks are the test results of the test piece weighing 8.5 g, and the black squares are the test results of the test piece weighing 12.7 g. It is. In addition, L1 represents a graph of an approximation formula of a linear function derived from the DC value in the first wash, L2 represents a graph of an approximation formula of a linear function derived from the DC value in the second wash, and L3 is A graph of a linear function approximation formula derived from the DC value in the third wash is shown, and L4 represents a graph of a linear function approximation formula derived from the DC value in the fourth wash.

It is preferable that the pad 1 is discharged quickly, and considering the number of washings acceptable to the user, the number of times of washing required for discharging is preferably 3 times or less, more preferably 2 times or less. According to the graph L3, the weight of the pad 1 (excluding the release paper 13) that can be discharged by washing within three times, that is, the weight of the pad 1 at which the DC value is 0% in the graph L3 is about 7.0 g. be. Also, the weight of the pad 1 that has a DC value of 20% or less after washing three times or less is about 8.2 g. Since the weight of the pad 1 at which the DC value is 0% is about 7.0 g, 7 g is a critical value, but considering the probability of rapid discharge, a smaller value of 6 g is preferable.

According to the graph L2, the weight of the pad 1 (excluding the release paper 13) that can be discharged by washing within two times, that is, the weight of the pad 1 at which the DC value is 0% in the graph L2 is about 3.5 g. be. Moreover, the weight of the pad 1 that has a DC value of 20% or less after washing twice or less is about 4.5 g. Therefore, from the viewpoint of ensuring fluidity, the weight of the pad 1 excluding the release paper 13 is desirably 8 g or less, more preferably 6 g or less, and more preferably 4 g or less.

(Embodiment 2)
The present invention will be described below with reference to the drawings showing the pad 1 according to the second embodiment. Among the configurations according to the second embodiment, the configurations similar to those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 8 is a schematic plan view of pad 1 according to the second embodiment. As shown in FIG. 8, protrusions 1c are formed at both ends of the arcuate recess 1a. The protruding portion 1c protrudes toward the opposite side of the protruding portion 1b. An edge portion of the projecting portion 1c has an arc shape in plan view. Note that the edge portion of the projecting portion 1c may be formed flat. The curvature of the concave portion 1a is less than or equal to a predetermined curvature. For example, as shown in FIG. 8, the predetermined curvature is 1/(D/2) where D is the width between both ends of the arc forming the projection 1b, and the curvature of the recess 1a is 1/ (D/2) or less. When the width is 30 mm, the curvature of the concave portion 1a is 1/15 or less. The predetermined curvature may be determined based on a width other than the width between both ends of the arc forming the protrusion 1b. Also, the curvature of the protrusion 1b may be greater than the curvature of the recess 1a.

FIG. 9 is a schematic plan view showing a state in which two pads 1 are connected. The two pads 1 are hereinafter referred to as a first pad 41 and a second pad 42 . As shown in FIG. 9, for example, the projection 1b of the second pad 42 is fitted into the recess 1a of the first pad 41 to connect the first pad 41 and the second pad 42 together.

In FIG. 9, the second pad 42 indicated by a solid line is arranged at a first limit position that does not interfere with the first pad 41, and the second pad 42 indicated by a broken line is located at the first pad 41. is placed in a second limit position that does not interfere with

As described above, the edge portion of the protrusion 1b is arcuate. As shown in FIG. 9, when an imaginary line connecting the center of curvature O of the protrusion 1b of the second pad 42 and the protrusion 1c of the second pad 42 is set, the center of curvature O and the protrusion at the first limit position The angle θ between the imaginary line connecting the portion 1c and the imaginary line connecting the center of curvature O and the projecting portion 1c at the second limit position is such that the projection of the second pad 42 does not interfere with the first pad 41. This is the range in which the portion 1b can be fitted into the concave portion 1a of the first pad 41. As shown in FIG. In other words, by adjusting the position of the second pad 42 within the range of the angle θ, the first pad 41 and the second pad 42 can be connected without creating a gap. In addition, the positions of the protrusions 1b or the recesses 1a can be adjusted in the circumferential direction without causing the first pad 41 and the second pad 42 to interfere with each other. The angle θ is, for example, approximately 135 degrees, and the second pad 42 can be arranged within the range of 0 degrees to 135 degrees.

In the second embodiment, the recessed portion 1a and the projecting portion 1b of the pad 1 are formed in an arc shape in a plan view, and the curvature of the recessed portion 1a is made smaller than a predetermined curvature, so that the two pads 1 can be arranged without interfering with each other. becomes larger and more convenient.

FIG. 10 is a schematic plan view of pad 1 according to a modification. As shown in FIG. 10, the concave portion 1a may have a quadrangular shape in plan view, and the protrusion 1b may have a quadrangular shape in plan view corresponding to the concave portion 1a. The protrusion 1b and the recess 1a may be curved in an arc with a curvature similar to that of the pad 1. FIG.

FIG. 11 is a schematic plan view of pad 1 according to a modification. As shown in FIG. 11, one end of the pad 1 may be formed in a sawtooth shape or a comb-tooth shape in plan view to form a plurality of recesses 1a. Further, the other end of the pad 1 may be formed in a sawtooth shape or a comb-tooth shape in a plan view, and a plurality of protrusions 1b corresponding to the plurality of recesses 1a may be formed. The protrusion 1b and the recess 1a may be curved in an arc with a curvature similar to that of the pad 1. FIG.

A plurality of protrusions 1b are fitted into a plurality of recesses 1a to form a labyrinth at the connecting portion of two adjacent pads 1.例文帳に追加Therefore, it is possible to effectively prevent water leakage from the connecting portion of two adjacent pads 1 .

The embodiments disclosed this time should be considered as examples in all respects and not restrictive. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of the claims and the scope of equivalents to the scope of the claims. be done.

REFERENCE SIGNS LIST 1 pad 1a recess 1b projection 10 water absorbing layer 11 surface material 12 adhesive 13 release paper

Claims (5)

In a pad extending in a predetermined direction,
A concave portion is formed at one end,
A protrusion having a shape corresponding to the recess is formed on the other end,
The pad is
a water absorbing layer;
surface materials arranged on both sides of the water absorbing layer;
an adhesive disposed on either one of the facings; and
The weight of the water-absorbing layer, surface material and pressure-sensitive adhesive is reduced to the DC value (Drain
a weight that causes the door or Clogged value to be 20% or less, and is 8 g or less ;
The concave portion and the protrusion are arcuate,
The radius of curvature of the concave portion and the convex portion are the same,
Curvatures of the concave portion and the convex portion are both less than or equal to a predetermined curvature and have the same curvature,
The predetermined curvature is 1/(D/2) where D is the width between both ends of the arc forming the protrusion.
pad. In a pad extending in a predetermined direction,
A concave portion is formed at one end,
A protrusion having a shape corresponding to the recess is formed on the other end,
The concave portion and the protrusion are arcuate,
The radius of curvature of the concave portion and the convex portion are the same,
Curvatures of the concave portion and the convex portion are both less than or equal to a predetermined curvature and have the same curvature,
The predetermined curvature is 1/(D/2), where D is the width between both ends of the arc forming the protrusion. The pad is
a water absorbing layer;
surface materials arranged on both sides of the water absorbing layer;
an adhesive disposed on either one of the facings; and
3. The pad according to claim 1 , wherein the weight of said water absorbing layer, surface material and adhesive is 10 g or less. 4. The pad according to any one of claims 1 to 3 , wherein the number of said recesses and said protrusions is singular respectively. A pad set comprising a plurality of pads according to any one of claims 1 to 4 .

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