Connecting sheet and garment sticking article

Abstract

To provide a connecting sheet that can reduce noise generated when peeled from an object.SOLUTION: The connecting sheet is laminated to the object and thus connected to the object, and includes: a sheet substrate having a first main surface and a second main surface; a first adhesive layer formed on the first main surface of the sheet substrate; and a plurality of hook components that protrude from the first main surface of the sheet substrate in a first direction and are spaced in a second direction in which the first main surface extends. The hook components each includes: a column portion that extends from the sheet substrate in the first direction and protrudes from a surface of the first adhesive layer; and a head portion that extends from a tip of the column portion in the second direction. The lower surface of the head portion is covered with an adhesive material.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] One aspect of the present invention relates to a connecting sheet and a clothing attachment article. [Background technology]

[0002] Conventionally, a connecting sheet using an adhesive material has been used to fix an article to clothing or the like. For example, an absorbent article such as a napkin is fixed to clothing such as underwear via the adhesive material of the connecting sheet. For example, Patent Document 1 describes a connecting sheet having a slip-preventing adhesive layer for removably attaching an article to clothing. This connecting sheet has an adhesive layer on the main surface of a sheet substrate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-115563 A Summary of the Invention [Problem to be solved by the invention]

[0004] When an article such as a napkin is peeled off from a garment, the adhesive layer of the connecting sheet is peeled off from the garment. In this case, noise is generated as the adhesive layer peels off from the garment. Conventional connecting sheets have a problem in that they generate a large amount of noise when peeled off from the garment. Therefore, there has been a demand for reducing the noise generated when peeling off the connecting sheet from an object such as a garment. [Means for solving the problem]

[0005] A connecting sheet in one embodiment of the present invention is a connecting sheet that connects to an object by being overlaid on the object, and comprises a sheet base material having a first main surface and a second main surface, a first adhesive layer formed on the first main surface of the sheet base material, and a plurality of hook members that protrude in a first direction from the first main surface of the sheet base material and are arranged at a distance from each other in a second direction in which the first main surface extends, wherein the hook members extend in the first direction from the sheet base material and comprise a pillar portion that protrudes from the surface of the first adhesive layer, and a head portion that extends in the second direction from the tip of the pillar portion, and at least the underside of the head portion is covered with an adhesive material. Effect of the Invention

[0006] According to the present invention, it is possible to reduce noise that occurs when the connecting sheet is peeled off from an object. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a napkin provided with a connecting sheet according to one embodiment. [Diagram 2] FIG. 2 is a cross-sectional view showing a portion of a connecting sheet according to an embodiment. [Diagram 3] FIG. 2A is a perspective view showing a roll product in which a connecting sheet is wound into a roll, and FIG. 2B is a cross-sectional view showing how the connecting sheets are overlapped in the roll product. [Figure 4] 13 is a graph showing the relationship between the thickness of the first adhesive layer of the connecting sheet and the noise level. [Diagram 5] 1A is an enlarged photograph of the connecting sheet according to the embodiment, and FIG. 1B is an enlarged photograph showing the connecting sheet before the adhesive material is applied. [Figure 6] 1 is a table showing experimental results of examples and comparative examples. [Figure 7] 1 is a table showing experimental results of examples and comparative examples. [Figure 8] 1 is a table showing experimental results of examples and comparative examples. [Figure 9] 1 is a table showing experimental results of examples and comparative examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Various embodiments will be described in detail below with reference to the drawings, in which the same or corresponding parts are designated by the same reference numerals.

[0009] FIG. 1 is a diagram showing a napkin with a connecting sheet according to one embodiment of the present invention. The napkin 1 has a surface 1a facing the skin and having liquid permeability, a back surface 1b (connecting surface) facing the clothing and being liquid impermeable, and a connecting sheet 100 provided on the back surface 1b. The back surface 1b is the connecting surface that is connected to the clothing. In the example shown in FIG. 1, the connecting sheets 100 are provided in a plurality of regions on the back surface 1b and are arranged at a distance from each other. Note that the number of regions in which the connecting sheets 100 are provided, the shape of each region, and the size of each region are not limited to the above and can be designed as desired. In addition, the article to which the connecting sheet 100 is applied is not limited to napkins, and may be applied to, for example, light incontinence pads, heating pads (used by attaching to clothing), etc. The napkin and the light incontinence pad are also referred to as an absorbent article. The absorbent article and heating pads that are further attached to clothing are also referred to as a clothing-attached article.

[0010] Next, the structure of the connecting sheet 100 will be described with reference to Fig. 2. Fig. 2 is a cross-sectional view showing a portion of the connecting sheet 100 according to one embodiment. For the purpose of explanation, Fig. 2 also shows an XYZ orthogonal coordinate system.

[0011] The connecting sheet 100 is connected to an object 150 such as underwear by being overlapped thereon. In this way, the connecting sheet 100 can fix the napkin 1 to the object 150 such as clothing. As shown in FIG. 2, the connecting sheet 100 includes a sheet base material 110, a first adhesive layer 120, a second adhesive layer 125, and a plurality of hook members 130. In this embodiment, the direction perpendicular to the sheet base material 110 is defined as the Z-axis direction (first direction). The direction perpendicular to the Z-axis direction is defined as the X-axis direction, and the direction perpendicular to the Z-axis direction and the X-axis direction is defined as the Y-axis direction.

[0012] The sheet base material 110 is substantially sheet-like, and has a first main surface 110a and a second main surface 110b that face each other in the Z-axis direction. The sheet base material 110 extends in the XY plane direction (second direction). That is, the first main surface 110a and the second main surface 110b extend in the XY plane direction. Among them, a plurality of hook members 130 are formed on the first main surface 110a. The sheet base material 110 is formed from a resin material such as, for example, poly(ethylene terephthalate), polyamide such as nylon, poly(styrene-acrylonitrile), poly(acrylonitrile-butadiene-styrene), polyolefin such as polypropylene, plasticized vinyl chloride, polyester, etc. The thickness of the sheet base material 110 is about 20 μm to 100 μm.

[0013] The first adhesive layer 120 is formed on the first main surface 110a of the sheet substrate 110. The first adhesive layer 120 is provided so as to fill the gaps between the multiple hook members 130. The first adhesive layer 120 is formed so as to cover substantially the entire surface of the first main surface 110a (excluding the positions of the hook members 130). For example, natural rubber / resin, synthetic rubber / resin, and acrylate copolymers are used as the material for the first adhesive layer 120. The thickness of the first adhesive layer 120 may be 10 μm or more, or 20 μm or more, and may be 100 μm or less, or 90 μm or less. The coating weight may be 10 gsm or more, or 20 gsm or more, and may be 100 gsm or less, or 90 gsm or less. The adhesive strength of the first adhesive layer 120 may be 2 (N / 25 mm) or more, or 4 (N / 25 mm) or more, or 14 (N / 25 mm) or less, or 8 (N / 25 mm) or less. The adhesive strength of the first adhesive layer 120 is a value defined by a method called JISZ 0237.

[0014] The second adhesive layer 125 is formed on the second main surface 110b of the sheet substrate 110. The material of the second adhesive layer 125 is the same adhesive material as that of the first adhesive layer 120. The first adhesive layer 120 and the second adhesive layer 125 may be formed of the same adhesive material or different adhesive materials. The second adhesive layer 125 may be omitted. The thickness of the first adhesive layer 120 may be 10 μm or more, or 20 μm or more, and may be 120 μm or less, or 110 μm or less.

[0015] The hook members 130 protrude in the Z-axis direction (first direction) from the first main surface 110a of the sheet base material 110. The hook members 130 are arranged apart from each other in the XY plane direction in which the first main surface 110a extends. The hook members 130 may be arranged in a lattice shape perpendicular to the XY plane direction, or may be arranged in a lattice shape diagonal to the XY plane direction, a staggered shape, random, or other shapes. The hook members 130 may be made of a material such as poly(ethylene terephthalate), polyamide such as nylon, poly(styrene-acrylonitrile), poly(acrylonitrile-butadiene-styrene), polyolefin such as polypropylene, plasticized vinyl chloride, polyester, or the like. The hook members 130 may be made of the same material as the sheet base material 110 and may be formed integrally with the sheet base material 110. Alternatively, the hook members 130 may be made of a material different from that of the sheet base material 110 and may be formed as separate members. The density at which the hook members 130 are arranged can be, for example, about 500 to 5000 pieces per square inch, or about 1600 to 3500 pieces per square inch.

[0016] The average height of the hook members 130 from the first major surface 110a may be 170 μm or more, or 90 μm or more. The average height of the hook members 130 from the first major surface 110a may be 330 μm or less, or 310 μm or less.

[0017] The hook member 130 protrudes in the Z-axis direction positive side from the surface 120a on the Z-axis direction positive side of the first adhesive layer 120. The difference between the average height of the hook member 130 (height measured from the first main surface 110a of the sheet base material 110) and the average thickness of the first adhesive layer 120 (thickness measured from the first main surface 110a of the sheet base material 110), i.e., the protrusion amount of the hook member 130 from the first adhesive layer 120, may be 10 μm or more, or 100 μm or more. The protrusion amount may be 600 μm or less, or 500 μm or less. Note that this protrusion amount is finally determined within the scope of the spirit of the invention depending on various factors such as the size and density of the hook member 130, the material and thickness of the adhesive material, and the type of the target object. In addition, the heights of all the hook members 130 in the connecting sheet 100 may be the same (variation within the range of manufacturing error is allowed), or the heights may be different between some areas and other areas.

[0018] Hook member 130 includes a pillar portion 131 and a head portion 132. Pillar portion 131 extends in the Z-axis direction from sheet substrate 110 and protrudes from surface 120a of first adhesive layer 120. Head portion 132 extends in the XY plane direction from the tip of pillar portion 131. Note that the shapes of pillar portions 131 and head portions 132 of all hook members 130 in connecting sheet 100 may be the same (variations within the range of manufacturing error are permitted), or the shapes may differ between some regions and other regions.

[0019] The hook member 130 has adhesive-applied portions 141, 142 formed by covering the portions protruding from the first adhesive layer 120 with an adhesive. Specifically, the outer peripheral surface 131a of the column portion 131 is covered with an adhesive. As a result, the adhesive-applied portion 141 is formed on the outer peripheral side of the column portion 131. Also, the lower surface 132a of the head portion 132 is covered with an adhesive. As a result, the adhesive-applied portion 142 is formed on the lower side of the head portion 132. The thickness of the adhesive-applied portion 141 is not particularly limited, but may be 5 μm or more, or may be 10 μm or more. Also, the thickness may be 50 μm or less, or may be 40 μm or less. The thickness of the adhesive-applied portion 142 is not particularly limited, but may be 5 μm or more, or may be 10 μm or more. Also, the thickness may be 100 μm or less, or may be 80 μm or less.

[0020] The adhesive application portion 142 is formed over the entire area between the inner peripheral end portion (the connection portion between the column portion 131 and the head portion 132) and the outer peripheral end portion 132b of the underside 132a of the head portion 132. Therefore, the adhesive application portion 142 of the head portion 132 extends further outward than the adhesive application portion 141 of the column portion 131.

[0021] A release material 155 is applied to the upper surface 132c of the head 132 of the hook member 130. As a result, the upper surface 132c of the head 132 is in a state where no adhesive material is applied. Here, as shown in FIG. 3(a), the connecting sheet 100 may be rolled up and distributed as a rolled product 200. At this time, as shown in FIG. 3(b), the connecting sheet 100 is rolled up so that the first main surface 110a is disposed on the outer periphery side. The hook member 130 is disposed so as to protrude from the first main surface 110a toward the outer periphery side. Therefore, the second adhesive layer 125 on the second main surface 110b side is superimposed on the upper surface 132c of the head 132 of the hook member 130 disposed on the inner periphery side. Since the release material 155 is applied to the upper surface 132c of the head 132 and no adhesive material is disposed thereon, the superimposed second adhesive layer 125 can be quickly peeled off from the upper surface 132c.

[0022] Next, the action and effect of the connecting sheet 100 according to this embodiment will be described.

[0023] The connecting sheet 100 is a connecting sheet 100 that connects to an object 150 by being overlapped with the object 150, and comprises a sheet base material 110 having a first main surface 110a and a second main surface 110b, a first adhesive layer 120 formed on the first main surface 110a of the sheet base material 110, and a plurality of hook members 130 that protrude from the first main surface 110a of the sheet base material 110 in the Z-axis direction and are arranged at a distance from each other in the X-axis and Y-axis directions along which the first main surface 110a extends, and the hook members 130 extend from the sheet base material 110 in the Z-axis direction and comprise a pillar portion 131 that protrudes from the surface of the first adhesive layer 120, and a head portion 132 that extends from the tip of the pillar portion 131 in the X-axis and Y-axis directions, and a lower surface 132a of the head portion 132 is covered with an adhesive material.

[0024] FIG. 4 is a graph showing the relationship between the thickness of the first adhesive layer 120 of the connecting sheet and the noise level. The noise level indicates the magnitude of noise generated when the connecting sheet is peeled off from the object. Measurement point P1 indicates the measurement result when the thickness of the first adhesive layer 120 is 0, that is, when the first adhesive layer 120 is not formed. Measurement point P2 indicates the measurement result when the thickness of the first adhesive layer 120 is large and the hook member 130 is completely buried in the first adhesive layer 120. That is, measurement point P2 indicates the noise level when the connecting sheet is composed of only the adhesive layer. As shown in FIG. 4, the noise level decreases as the thickness of the first adhesive layer 120 increases from measurement point P1, and the noise level decreases as the thickness of the first adhesive layer 120 decreases from measurement point P2, and the noise level is minimized at measurement point P3. In this way, when the connecting sheet 100 according to this embodiment is connected to the object by both the hook member 130 and the first adhesive layer 120, the noise generated during peeling can be reduced.

[0025] In this way, the effect of reducing noise when the connecting sheet 100 is peeled off is obtained by a combination of multiple factors. For example, when both the hook member 130 and the first adhesive layer 120 are connected to the object 150, the first adhesive layer 120 is intermittently bonded to the object 150. In this case, noise during peeling can be reduced compared to when the first adhesive layer 120 is peeled off from a state in which it is bonded to the entire surface of the object 150. In addition, the lower surface 132a of the head 132 of the hook member 130 is covered with an adhesive material. Therefore, when the head 132 of the hook member 130 is released from the fibers of the object 150 during peeling, the adhesive material functions as a cushion. This attenuates the force of deformation of the head 132 during peeling, thereby reducing the generated noise.

[0026] The adhesive strength of first adhesive layer 120 is 2 (N / 25 mm) to 14 (N / 25 mm). In this case, the connecting strength between connecting sheet 100 and object 150 can be ensured, while noise generated during peeling can be suppressed.

[0027] The height of hook member 130 from first main surface 110a is 170 μm to 330 μm. In this case, the connecting force between connecting sheet 100 and object 150 can be ensured, while noise generated during peeling can be suppressed.

[0028] The connecting sheet 100 further includes a second adhesive layer 125 formed on the second main surface 110b of the sheet substrate 110. In this case, the connecting sheet 100 is fixed to another member via the second adhesive layer 125.

[0029] A release material 155 is applied to the upper surface 132c of the head 132 of the hook member 130. In this case, it is possible to prevent the adhesive material from adhering to the upper surface 132c of the head 132.

[0030] The connecting sheet 100 is wound into a roll so that the first main surface 110a is disposed on the outer periphery side. In this case, the connecting sheet 100 can be unwound from the roll and cut into the required amount of connecting sheet 100.

[0031] The napkin 1 has the above-mentioned connecting sheet 100 on the connecting surface to be connected to the garment. In this case, it is possible to reduce noise that occurs when the napkin 1 is peeled off from the garment.

[0032] In addition, general napkins are individually wrapped. The wrapping material is made of nonwoven fabric, film, paper, etc. In conventional napkins, the connecting sheet is composed only of an adhesive layer, so if the adhesive layer is exposed, it will adhere to the wrapping material and will not be able to be peeled off or will be damaged during use. Therefore, in the past, the adhesive layer was covered with a release liner or a release material was applied to the wrapping material. On the other hand, in the case of the napkin 1 using the connecting sheet 100 of this embodiment, the adhesive force to the wrapping material can be suppressed, so it is advantageous that the release liner or the application of a release layer to the wrapping material is not necessary. Furthermore, the hook member 130 can prevent the napkin 1 from slipping from the wrapping material, and it is also advantageous to prevent the napkin 1 from wrinkles caused by the napkin 1 moving in the wrapping material.

[0033] The present invention is not limited to the above-described embodiments.

[0034] For example, the shape of the hook member is not limited to the above-described embodiment, and may be any shape. That is, the shape of the hook member is not particularly limited as long as it has a post and a head and can form a layer of adhesive on the underside of the head.

[0035] The following examples are given, but the present invention is not limited to these examples.

[0036] [Example] The sheet substrate 110 having the hook member 130 shown in FIG. 5(b) was formed with the first adhesive layer 120 and the adhesive application parts 141, 142 as shown in FIG. 5(a) to obtain Example 1. The height of the hook member, the adhesive composition, the amount of adhesive applied, the adhesive strength, and the shear strength were set under the conditions shown in FIG. 6. The adhesive strength was measured based on JIS Z 0237 by applying 80 μm of adhesive to a PP film, attaching it to a SUS panel, and performing a 90° peel at 300 (mm / min). The adhesive strength is expressed in units of "N / 25 mm". The shear strength was measured by attaching it to cotton attached to a metal panel and pulling it in the shear direction at 300 (mm / min). The shear strength was expressed in units of "N / 20 mm x 25 mm". In addition, the diameter of the post part of the hook member was 250 μm, the diameter of the head was 290 μm, and the thickness of the head was 80 μm. The density of the hook members was 1600 pins / in 2 .

[0037] In comparison with Example 1, Example 2 (see FIG. 7) and Example 3 (see FIG. 8) were prepared by using a different adhesive material as the first adhesive layer and applying a different amount of adhesive. In comparison with Example 1, Comparative Example 1 was prepared by eliminating the first adhesive layer, and Comparative Example 2 was prepared by eliminating the hook member (see FIG. 6). In comparison with Example 2, Comparative Example 3 was prepared by eliminating the hook member (see FIG. 7). In comparison with Example 3, Comparative Example 4 was prepared by eliminating the hook member (see FIG. 8). In comparison with Example 1, Examples 4 and 5 were prepared by changing the height of the hook member and the adhesive material (see FIG. 9). Comparative Example 5 was prepared by using a commercially available product without a hook member (Unicharm Corporation's "Sofy Hadaomoi (registered trademark) Soft Type 25 cm") (presumably using hot melt as the adhesive layer) (see FIG. 9).

[0038] For the above-mentioned Examples 1 to 5 and Comparative Examples 1 to 5, the magnitude of noise generated during peeling was measured. In this measurement, the connecting sheets of Examples 1 to 5 and Comparative Examples 1 to 5 were fixed to a napkin, and the napkin was connected to an underwear via the connecting sheet. Then, the noise generated when the napkin was peeled off from the underwear by hand was measured. The noise was measured using a precision sound level meter manufactured by Rion Co., Ltd. In this measurement, the magnitude of noise (dB) was measured at each frequency from 31.5 to 8000 Hz. The results are shown in Figures 6 to 9.

[0039] The frequencies of noise that users are concerned about as noise are between 500 and 4000 Hz. In Figs. 6 to 8, the results of Examples 1 to 3 at those frequencies are hatched. At those frequencies, in Fig. 6, the noise of Example 1 is smaller than that of Comparative Examples 1 and 2, and the relationship shown in the graph in Fig. 4 holds. Similarly, in Example 2 in Fig. 7 and Example 3 in Fig. 8, the relationship shown in the graph in Fig. 4 holds. [Explanation of symbols]

[0040] 1...napkin, 100...connecting sheet, 110...sheet base material, 110a...first main surface, 110b...second main surface, 120...first adhesive layer, 125...second adhesive layer, 130...hook member, 131...post portion, 132...head portion, 132a...lower surface, 150...object, 155...release material.

Claims

1. A connection sheet that is connected to an object by being superimposed on the object, A sheet substrate having a first main surface and a second main surface; a first adhesive layer formed on the first main surface of the sheet base; a plurality of hook members protruding in a first direction from the first main surface of the sheet base material and arranged spaced apart from each other in a second direction in which the first main surface extends; The hook member is a column portion extending from the sheet base material in the first direction and protruding from a surface of the first adhesive layer; a head portion extending from a tip end of the column portion in the second direction, At least the underside of the head is covered with an adhesive material.

2. The connecting sheet according to claim 1 , wherein the adhesive strength of the first adhesive layer is 2 (N / 25 mm) to 14 (N / 25 mm).

3. 3. The connecting sheet according to claim 1, wherein the height of the hook member from the first main surface is 170 μm to 330 μm.

4. The connecting sheet according to claim 1 , further comprising a second adhesive layer formed on the second main surface of the sheet substrate.

5. The connecting sheet according to any one of claims 1 to 4, wherein a release material is applied to an upper surface of the head of the hook member.

6. The connecting sheet according to any one of claims 1 to 5, which is wound into a roll shape so that the first main surface is disposed on the outer periphery.

7. A clothing attachment article comprising the connecting sheet according to any one of claims 1 to 6 on a connecting surface to be connected to clothing.

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