Connecting sheet and garment-adhering article

Abstract

To provide a connecting sheet with appropriate softness, and a garment-adhering article.SOLUTION: A connecting sheet connecting with a target object by overlapping the target object includes: a sheet base material having a first main surface and a second main surface; a plurality of hook members protruding from the first main surface of the sheet base material in a first direction and spaced in a second direction in which the first main surface extends; and an adhesive layer adhering to the hook members. The polyethylene content of the sheet base material and hook member is 15 wt.% or more, and the density of the polymer mixture of the sheet base material and the hook member is 0.925 g / cm3 or less.SELECTED DRAWING: Figure 7

Description

[Technical Field]

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

[0002] Connecting sheets using adhesive materials have been used to secure articles to clothing and the like. For example, absorbent articles such as napkins are secured to clothing such as underwear via the adhesive of the connecting sheet. For example, Patent Document 1 describes a connecting sheet having a slip-preventing adhesive layer for releasably attaching the article to clothing. This connecting sheet has an adhesive layer on the main surface of the sheet substrate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-115563 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the connecting member is too hard, it may cause skin pain when it comes into contact with the user's skin. Therefore, there has been a need for a connecting sheet with appropriate softness that can reduce skin pain. One solution to this problem is to thin the sheet substrate, but this method affects productivity and quality stability, and causes problems such as wrinkles and tears in the connecting sheet. Another solution is to thin the hook member, but this method affects the properties of the connecting sheet. [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 placed on top of the object, and includes: a sheet base having a first main surface and a second main surface; a plurality of hook members that protrude in a first direction from the first main surface of the sheet base and are arranged at a distance from each other in a second direction in which the first main surface extends; and an adhesive layer attached to the hook members, wherein the polyethylene content of the sheet base and the hook members is 15 wt % or more, and the density of the mixed polymer of the sheet base and the hook members is 0.925 g / cm 3 The following is the result. [Effects of the Invention]

[0006] According to the present invention, a connecting sheet and a clothing attachment article having appropriate softness can be provided. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a napkin provided with a connecting sheet according to one embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing a portion of a connecting sheet according to one embodiment. [Figure 3] FIG. 1(a) is a diagram showing how to attach a napkin to underwear, and FIG. 1(b) is a diagram showing how the napkin has been attached to underwear. [Figure 4] 1 is a table showing the conditions and measurement results of Samples 1 to 14 prepared for measurement. [Figure 5] 1 is a graph showing the relationship between the PE content and softness of each sample. [Figure 6] 1 is a table showing the PE content and mixed polymer density of each sample. [Figure 7] 1 is a graph plotting the relationship between PE content and blended polymer density for each sample. [Figure 8] 1 is a table illustrating a method for measuring the mixed polymer density. [Figure 9] 1 is a graph for explaining measurement of the PP-PE ratio. [Figure 10]The relationship between the PE content and the peak intensity ratio is shown. DETAILED DESCRIPTION OF THE INVENTION

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

[0009] FIG. 1 is a diagram showing a napkin equipped with a connecting sheet according to one embodiment of the present invention. The napkin 1 has a liquid-permeable front surface 1a facing the skin, a liquid-impermeable back surface 1b (connecting surface) facing the clothing, 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, connecting sheets 100 are provided in multiple regions on the back surface 1b, each spaced apart from one another. The number of regions in which the connecting sheets 100 are provided, the shape of each region, and the dimensions of each region are not limited to these and can be designed as desired. Furthermore, the connecting sheet 100 is not limited to napkins and may be applied to light incontinence pads, body warmers (used by attaching them to clothing), and other such products. Napkins and light incontinence pads are collectively referred to as absorbent articles. Absorbent articles, including body warmers that are attached to clothing, are also referred to as garment-attachable articles.

[0010] 3(a) is a diagram showing the state in which the napkin 1 is attached to the object 150. FIG. 3(b) is a top view showing the state in which the napkin 1 is attached to the object 150. An example of the object 150 is pants 160. The napkin 1 is attached to the bottom part 161 of the pants 160.

[0011] Next, the structure of connecting sheet 100 will be described with reference to Figure 2. Figure 2 is a cross-sectional view showing a portion of connecting sheet 100 according to one embodiment. For the purpose of explanation, an XYZ Cartesian coordinate system is also shown in Figure 2.

[0012] The connecting sheet 100 is connected to an object 150 such as underwear by being placed on top of the object 150. In this way, the connecting sheet 100 can secure 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 both the Z-axis direction and the X-axis direction is defined as the Y-axis direction.

[0013] The sheet base material 110 is generally sheet-shaped 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. Of these, a plurality of hook members 130 are formed on the first main surface 110a.

[0014] 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 spaces 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 (except for the positions of the hook members 130). Examples of materials used for the first adhesive layer 120 include natural rubber / resin, synthetic rubber / resin, and acrylate copolymers. 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, in the state of an adhesive tape, 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 the JISZ 0237 method.

[0015] 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 may be formed of different adhesive materials. The second adhesive layer 125 may also 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.

[0016] The hook members 130 protrude in the Z-axis direction (first direction) from the first main surface 110a of the sheet substrate 110. The hook members 130 are arranged spaced apart from one another in the XY plane in which the first main surface 110a extends. The hook members 130 may be arranged in a lattice pattern perpendicular to the XY plane, or in various other patterns such as a lattice pattern diagonal to the XY plane, a staggered pattern, or random. The hook members 130 protrude further toward the Z-axis direction positive side than the surface 120a of the first adhesive layer 120 on the Z-axis direction positive side.

[0017] 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 from the tip of pillar portion 131 in the XY plane. 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 allowed), or the shapes may differ between some regions and other regions.

[0018] The hook member 130 has adhesive-applied portions 141, 142, and 155 formed by covering portions protruding from the first adhesive layer 120 with an adhesive. Specifically, the outer peripheral surface 131a of the pillar portion 131 is covered with an adhesive. As a result, the adhesive-applied portion 141 is formed on the outer peripheral side of the pillar portion 131. Furthermore, 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 adhesive-applied portion 142 is formed over the entire area of ​​the lower surface 132a of the head portion 132 between the inner peripheral end (the connection portion between the pillar portion 131 and the head portion 132) and the outer peripheral end 132b. Therefore, the adhesive-applied portion 142 of the head portion 132 extends further outward than the adhesive-applied portion 141 of the pillar portion 131. The upper surface 132c of the head portion 132 is covered with an adhesive. As a result, an adhesive application portion 155 is formed on the upper side of the head portion 132 .

[0019] Next, the materials of the sheet substrate 110 and the hook member 130 will be described. The sheet substrate 110 and the hook member 130 contain at least polyethylene (PE). The sheet substrate 110 and the hook member 130 are composed of, for example, a mixed polymer in which an additive polymer is added to a base polymer. Polypropylene (PP) or a polypropylene-polyethylene (PP-PE) copolymer is used as the base polymer. Low-density polyethylene is used as the additive polymer. The base polymer of the copolymer tends to have high rigidity due to high crystallization of the polymer. On the other hand, low-density resins tend to have low rigidity (softness) due to low crystallization of the polymer. The polyethylene content and density of the mixed polymer are adjusted by adjusting the amount of low-density polyethylene added to the base polymer. The polyethylene monomer is preferably derived from a plant (such as sugar cane).

[0020] The polyethylene content of the sheet substrate 110 and the hook member 130 is 15 wt% or more and 100 wt% or less, and the density of the mixed polymer of the sheet substrate 110 and the hook member 130 is 0.900 g / cm 3 More than 0.925g / cm 3The polyethylene content of the sheet substrate 110 and the hook member 130 may be 20 to 95 wt %, and the density of the mixed polymer of the sheet substrate 110 and the hook member 130 may be 0.901 to 0.920 g / cm 3 . 3 The polyethylene content of the sheet substrate 110 and the hook member 130 may be 25 to 60 wt %, and the density of the mixed polymer of the sheet substrate 110 and the hook member 130 may be 0.902 to 0.915 g / cm 3 . 3 It may be the following:

[0021] The thickness of the sheet substrate 110 may be 70 μm or less, or may be 50 μm or less. The thickness of the sheet substrate 110 may be 10 μm or more, or may be 20 μm or more. The average height of the hook members 130 from the first main surface 110a may be 170 μm or more, or may be 90 μm or more. The average height of the hook members 130 from the first main surface 110a may be 330 μm or less, or may be 310 μm or less. The diameter of the post portion 131 of the hook member 130 may be 100 μm or more, or may be 150 μm or more. The diameter of the post portion 131 of the hook member 130 may be 350 μm or less, or may be 250 μm or less. The density at which the hook members 130 are arranged may be, for example, approximately 500 to 5000 pieces per square inch, or approximately 1600 to 3500 pieces per square inch.

[0022] The shear strength of the connecting sheet 100 connected to the object 150 is a parameter that indicates the resistance of the napkin 1 connected to the object 150 via the connecting sheet 100 to slip. The shear strength of the connecting sheet 100 connected to the object 150 is 0.9 N / 5 cm 2 It may be more than 2.4N / 5cm 2 The shear strength of the connecting sheet 100 connected to the object 150 may be 9 N / 5 cm or more. 2 May be less than 8N / 5cm 2 It may be the following:

[0023] The initial tack of the connecting sheet 100 is a parameter that indicates the sticky feel to the touch. The initial tack is 0.01 N / 6.25 cm 2 It may be more than 0.02N / 6.25cm 2 The initial tack may be 0.1N / 6.25cm or more. 2 May be less than 0.09N / 6.25cm 2 The following is acceptable.

[0024] The peel strength of each sample to underwear was measured by fixing the underwear to a SUS panel, placing the sample, and then rolling it back and forth with a 7 kg roller pressure, followed by a 90° peel at a peel speed of 300 mm / min. For this measurement, the underwear used was the skin-contacting side of "Wacoal PGG340." The sheet substrate measured 25 mm x 20 mm.

[0025] In addition, to measure dynamic shear force, underwear was fixed to a SUS panel and subjected to a 2 kg roller pressure with a crosshead speed of 30 mm / min after one round trip. The underwear was pulled in a 180° direction (along the 25 mm side) to shear, and the tensile strength was measured. For this measurement, the underwear used was the skin-contacting side of "Wacoal Corporation EC4033." The sheet substrate measured 25 mm x 20 mm.

[0026] A T-shaped block made of stainless steel was also prepared to measure the initial tack. The pressing surface of the T-shaped block was set to a size of 25 mm x 25 mm. The pressing surface of the T-shaped block was pressed against a hook member 130 covered with an adhesive. At this time, the hook member 130 without adhesive was pressed against the block at 2 kg for 5 seconds and the force measured when the T-shaped block was pushed up at 300 mm / min was used as a reference value, and the hook member 130 covered with adhesive was pressed against the block at 2 kg for 5 seconds and the force measured when the T-shaped block was pushed up at 300 mm / min was used as a reference value, and the difference between the reference value and the force measured when the hook member 130 with adhesive was pressed against the block at 2 kg for 5 seconds and the T-shaped block was pushed up at 300 mm / min was calculated as the initial tack.

[0027] The softness of the connecting sheet 100 is 0.06gf*cm 2 / cm or less, and may be 0.05gf*cm 2 The softness of the connecting sheet 100 may be 0.01 gf*cm 2 / cm or more, and may be 0.02gf*cm 2 / cm or more. The softness of connecting sheet 100 is measured using a series of devices called KES (Kawabata Evaluation System). The results of measurement using KES indicate how easily connecting sheet 100 bends.

[0028] Next, with reference to Figs. 4 to 10, the measurement of the softness of the connecting sheet 100 and the relationship between the polyethylene content and density in the mixed polymer will be described. Fig. 4 is a table showing the conditions and measurement results for Samples 1 to 14 prepared for the measurement. The height of the hook member was 420 µm, and the head diameter was 290 µm. The adhesive used was "Quintac3620 / Quintone M100 / / Irganox1076 = 60 / 39 / 1". The amount of adhesive applied was 93 g / m2. 2 It was decided.

[0029] In the table in Figure 4, the "Base Polymer" column lists the base polymer used in each sample. The "PE Structure" column lists the additional polymer added. The "Hook Member Density" column lists the density of the hook member. The "Sheet Substrate Thickness" column lists the thickness of the sheet substrate. The "Base Polymer Content" column lists the content of the base polymer when the entire mixed polymer is taken as 100 wt%. The "PE Resin Content" column lists the content of the PE in the additional polymer when the entire mixed polymer is taken as 100 wt%. The "PE Content" column lists the PE content when the entire mixed polymer is taken as 100 wt%. The "Base Polymer Density" column lists the density of the base polymer. The "PE Density" column lists the density of the PE in the additional polymer. The "Mixed Polymer Density" column lists the density of the entire mixed polymer. The "Softness" column lists the results of softness measurements.

[0030] The density measurement method in the above table will be explained with reference to Figure 8. Figure 8 shows the calculation method for the mixed polymer density for samples 1, 6, and 7. The mixed polymer density is calculated by averaging the measurements obtained by the gravitational buoyancy method and the gas displacement method. The gravitational buoyancy method is a density measurement method based on Archimedes' principle, which states that an object in a liquid experiences a buoyant force equal to the weight of the liquid displaced by the object. This method is subject to variation if air is entrained in the sample, resulting in an error of less than 1%. The gas displacement method is a density measurement method that utilizes Boyle's law (PV = constant).

[0031] The method for measuring the PP-PE ratio in the above table will be explained with reference to Fig. 9 and Fig. 10. In Fig. 9, the sample of "base polymer + 50 wt% PE of additional polymer", the sample of "base polymer + 25 wt% PE of additional polymer", and the "base polymer" were measured by infrared spectroscopy (IR). -1 A peak derived from PP was observed at the position of "A" in the figure, and a peak at 720 cm -1 A peak derived from PE is observed at position "B" in the figure. The intensities of these PP-derived peaks and PE-derived peaks are obtained, and the ratio of the two is calculated. Figure 10 shows the relationship between the PE content and the peak intensity ratio.

[0032] The method for measuring softness is as follows: Each sample was cut into a 25 mm x 25 mm test piece, which was then set in a bending device (Kawabata Evaluation System (KES)) to measure the softness of each sample.

[0033] Figure 5 shows the relationship between the PE content of the additional polymer and the softness measurement results. Figure 5 separates the results when the sheet substrate thickness was 95 μm from the results when the sheet substrate thickness was 45 μm. It was confirmed that increasing the PE content made the connecting sheet softer, regardless of the thickness of the sheet substrate.

[0034] FIG. 6 shows the PE structure, PE content, and mixed polymer density of each sample. FIG. 7 is a diagram plotting the relationship between the PE content and mixed polymer density of each sample. Based on the plot results for each sample, preferred ranges for the PE content and mixed polymer density are set. FIG. 7 shows a first range indicating a preferred range, a second range indicating a more preferred range, and a third range indicating an even more preferred range. The PE content in the first range is 15 wt% or more and 100 wt% or less. The mixed polymer density in the first range is 0.900 g / cm. 3 More than 0.925g / cm 3 The PE content in the second range is 20 to 95 wt%. The density of the mixed polymer in the second range is 0.901 to 0.920 g / cm. 3 The PE content in the third range is 25 to 60 wt%. The density of the mixed polymer in the third range is 0.902 to 0.915 g / cm. 3 The following is the result.

[0035] Next, the functions and effects of the connecting sheet 100 according to this embodiment will be described.

[0036] The connecting sheet 100 is a connecting sheet 100 that connects to an object 150 by being placed on top of the object 150, and includes a sheet base 110 having a first main surface 110a and a second main surface 110b, a plurality of hook members 130 that protrude in a first direction from the first main surface 110a of the sheet base 110 and are arranged spaced apart from each other in a second direction in which the first main surface 110a extends, and an adhesive layer 120 attached to the hook members 130, wherein the polyethylene content of the sheet base 110 and the hook members 130 is 15 wt % or more, and the density of the mixed polymer of the sheet base 110 and the hook members 130 is 0.925 g / cm 3 The following is the result.

[0037] Connecting sheet 100 includes a plurality of hook members 130 protruding in a first direction from first main surface 110a of sheet substrate 110, and adhesive layer 120 attached to hook members 130. Connecting sheet 100 is therefore connected to object 150 by the adhesive force of hook members 130 and adhesive layer 120. Here, the polyethylene content of sheet substrate and hook members is 15 wt% or more, and the density of the mixed polymer of sheet substrate and hook members is 0.925 g / cm 3 In this case, the softness of the sheet substrate and hook members can be adjusted appropriately by adjusting the polyethylene content and the density of the mixed polymer. As a result, a connecting sheet with appropriate softness can be provided.

[0038] The polyethylene content of the sheet substrate 110 and the hook member 130 is 20 to 95 wt %, and the density of the mixed polymer of the sheet substrate 110 and the hook member 130 is 0.901 to 0.920 g / cm 3 It may be.

[0039] The thickness of the sheet substrate may be 70 μm or less, which can prevent the connecting sheet from becoming too thick and hard.

[0040] The shear force of the connecting sheet connected to the object is 0.9N / 5cm 2 In this case, the article to be attached to clothing connected to the object using the connecting sheet can be prevented from slipping off.

[0041] Initial tack: 0.01~0.1N / 6.25cm 2 In this case, the connecting sheet can have an appropriate feel.

[0042] Softness: 0.06gf*cm 2 / cm or less, in which case the softness of the connecting sheet can be set within an appropriate range.

[0043] The garment-attached article includes the above-described connecting sheet on the connecting surface that is connected to the garment, which can reduce damage to the skin when the connecting sheet comes into contact with the user's skin.

[0044] The present invention is not limited to the above-described embodiments.

[0045] For example, the shape of the hook member is not limited to the above-described embodiment, and may be any shape, as long as it has a post and a head and can form an adhesive layer on the underside of the head.

[0046] [Form 1] A connecting sheet that is connected to an object by being placed on top of the object, a sheet substrate having a first main surface and a second main surface; a plurality of hook members that protrude in a first direction from the first main surface of the sheet base material and are arranged spaced apart from each other in a second direction in which the first main surface extends; an adhesive layer attached to the hook member, The polyethylene content of the sheet substrate and the hook member is 15 wt% or more, The density of the mixed polymer of the sheet substrate and the hook member is 0.925 g / cm 3 Below is the link sheet. [Form 2] The polyethylene content of the sheet substrate and the hook member is 20 to 95 wt %, The density of the mixed polymer of the sheet substrate and the hook member is 0.901 to 0.920 g / cm 3 The connection sheet according to embodiment 1, [Form 3] 3. The connecting sheet according to embodiment 1 or 2, wherein the thickness of the sheet substrate is 70 μm or less. [Form 4] The shear strength of the connecting sheet connected to the object is 0.9N / 5cm 2 The connection sheet according to any one of embodiments 1 to 3, which is as described above. [Form 5] Initial tack: 0.01~0.1N / 6.25cm 2 5. The connection sheet according to any one of embodiments 1 to 4, wherein: [Form 6] Softness: 0.06gf*cm 2 The connecting sheet according to any one of embodiments 1 to 5, wherein the thickness is 1 / cm or less. [Form 7] A clothing attachment article comprising the connecting sheet according to any one of the first to sixth embodiments on a connecting surface to be connected to clothing. [Explanation of symbols]

[0047] 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, 150...object.

Claims

1. A connecting sheet that is connected to an object by being placed on top of the object, a sheet substrate having a first main surface and a second main surface; 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; an adhesive layer attached to the hook member, The polyethylene content of the sheet base material and the hook member is 15 wt % or more, The density of the mixed polymer of the sheet substrate and the hook member is 0.925 g / cm ３ Below is the link sheet.

2. The polyethylene content of the sheet substrate and the hook member is 20 to 95 wt %, The density of the mixed polymer of the sheet substrate and the hook member is 0.901 to 0.920 g / cm ３ The connecting sheet according to claim 1 ,

3. 2. The connecting sheet according to claim 1, wherein the thickness of the sheet substrate is 70 μm or less.

4. The shear strength of the connection sheet connected to the object is 0.9 N / 5 cm ２ The connecting sheet according to claim 1 .

5. Initial tack: 0.01 to 0.1 N / 6.25 cm ２ The connecting sheet according to claim 1 ,

6. Softness: 0.06gf*cm ２ 10. The connecting sheet of claim 1, wherein the thickness is 1 / cm or less.

7. A clothing attachment product 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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