Fixing member and absorbent article having the same

Abstract

To provide a fixing member capable of achieving preferable ease of use even when an error by an operator or the like occurs, and an absorbent article having the same.SOLUTION: A fixing member in one embodiment comprises a first band member, a second band member and a third band member, in which the first to third band members are folded and held in the folded state. The first band member has a band-shaped first substrate layer, and a first adhesion layer, the second band member has a band-shaped second substrate layer provided between the first band member and the third band member, and a second adhesion layer, the third band member has a band-shaped third substrate layer and a third adhesion layer. The second substrate layer has; a pair of skin layers; and a core layer which is provided between the pair of skin layers and includes an elastomer, a total thickness of the pair of skin layers is 30% or greater of a thickness of the second substrate layer, and after extending the second band member along one direction by 300%, extension degree in the second band member in a free state, is 180% or greater.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] One aspect of the present invention relates to a fixing member and an absorbent article including the same. [Background technology]

[0002] Fixing members used to bundle objects together have been known for some time. For example, Patent Document 1 below discloses a fixing member formed by folding and stacking first to third band members. The second base material layer included in the second band member of this fixing member has elasticity, and when a tensile load is applied in one direction, the width of at least a portion of the second base material layer narrows. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-121931 Summary of the Invention [Problem to be solved by the invention]

[0004] When using such a securing member to bundle objects, a worker first grasps the free end of the first strap with his or her fingers. Next, the worker peels the first strap from the second strap, unfolds it, and then stretches the elastic second strap. If the worker accidentally releases the free end before securing the stretched securing member to the objects, the second base layer strongly contracts and springs back to its original state. This can affect the usability of the securing member, for example, by moving the unfolded free end away from the fingers holding it, striking the fingers holding the objects, securing the first strap to an object other than the objects being bundled, or securing the second base layer in a curled state. Therefore, a securing member that can be easily used even if the above-mentioned worker error occurs is desired. [Means for solving the problem]

[0005] A fixing member according to one aspect of the present invention comprises a first band member, a second band member, and a third band member stacked on one another, and holds the first to third band members in a folded state, and has a first joint portion between the second band member and the first band member and a second joint portion between the second band member and the third band member, the first band member having a band-shaped first base material layer and a first adhesive layer provided on one side of the first base material layer, the second band member having a band-shaped second base material layer located between the first band member and the third band member and a second adhesive layer provided on one side of the second base material layer, and the third band member having The second base material layer has a pair of skin layers and a core layer containing an elastomer, the core layer being located between the pair of skin layers, and the total thickness of the pair of skin layers is 30% or more of the thickness of the second base material layer. After the second band member is stretched 300% along one direction, the elongation of the second band member in a free state is 180% or more.

[0006] According to this aspect, after the third adhesive layer is adhered to the member to be fixed, the first adhesive layer is detached from the second base material layer, and the second adhesive layer is detached from the third base material layer. This eliminates the folds at the first and second joints, forming the first to third band members into a single band shape, and the fixing member is wrapped around the member to be fixed, starting from the third band member. Here, the total thickness of the pair of skin layers included in the second base material layer is 30% or more of the thickness of the second base material layer. After the second band member is stretched 300% in one direction, the elongation of the second band member in its free state is 180% or more. Therefore, even if an operator accidentally releases the fixing member while stretching it, for example, contraction of the second band member is relatively suppressed. This prevents the fixing member from springing back to an unexpected position and becoming curled due to contraction of the second band member, and prevents this state from being fixed to an undesired item by the adhesive layer. Therefore, in this aspect, even if an operator error such as that described above occurs, the fixing member can be made easy to use. [Effects of the Invention]

[0007] According to one aspect of the present invention, even if an operator makes a mistake, the fixing means can be made easy to use. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1(a) is a plan view of a fixing member according to an embodiment, and FIG. 1(b) is a cross-sectional view taken along line Ib-Ib in FIG. 1(a). [Figure 2] FIG. 2(a) is a view showing a developed fixing member according to the embodiment, and FIG. 2(b) is a view showing a cross section taken along line IIb-IIb in FIG. 2(a). [Figure 3] FIG. 3 is a schematic cross-sectional view of the second base material layer. [Figure 4] FIG. 4 is a schematic diagram showing a state in which the fixing member in a stacked state is attached to a fixed member. [Figure 5] Figure 5(a) is a diagram showing the state in which the fixing member of the reference example is stretched from the state in which it is attached to the fixed member and then in a free state, and Figure 5(b) is a diagram showing the state in which the fixing member of the embodiment is stretched from the state in which it is attached to the fixed member and then in a free state. [Figure 6] Figure 6(a) is a diagram showing a state in which a fixing member of a reference example is wrapped around a fixed member and fixed, and Figure 6(b) is a diagram showing a state in which a fixing member of an embodiment is wrapped around a fixed member and fixed. [Figure 7] FIG. 7 is a diagram showing a state in which the fixing member of the embodiment is fixed to a member to be fixed that is attached to an infant. [Figure 8] FIG. 8 is a diagram showing a state in which the fixing member of the embodiment in the unfolded state has reached the mouth of the baby. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicate explanations will be omitted. In addition, the drawings are partially exaggerated to facilitate understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0010] In this specification, the term "fixing member" refers to a member used to fix a fixed member. The fixed member may be any object, and there are no limitations on its type, shape, size, number, etc. Therefore, there are no limitations on the purpose of use of the fixing member.

[0011] As one example, the fixing member is used to maintain the shape of a fixed member that has been rolled up into a small bundle by being rolled, folded, or wound. For example, the fixing member can be used to maintain the state of an absorbent article (e.g., sanitary products such as disposable diapers, sanitary napkins, and incontinence pads) that has been rolled up into a small bundle. Disposable diapers, which are an example of an absorbent article, include baby diapers, children's diapers, and adult diapers. As another example, the fixing member may be used to fix the same or different types of fixed members to each other. For example, the fixing member may be used to attach or fix an absorbent article to clothing, or may be used to bundle multiple articles. In other words, the fixed member is not limited to a single article. As yet another example, the fixing member may be used to fix a first region and a second region of a fixed member. For example, the fixing member may be used as a sealing tape attached to a food bag to preserve the food.

[0012] The fixing member includes multiple band-shaped members (band members). The term "band member" as used herein refers to a thin, plate-like, rod-like, or string-like member. In this specification, the direction perpendicular to the longitudinal direction A of the band member is defined as the width direction B. The longitudinal direction A can also be referred to as the winding direction of the fixing member or the unfolding direction (one direction) of the fixing member. Each band member extends linearly along the longitudinal direction A. In one embodiment, the length (long side length) of each band member in the longitudinal direction A may be 5 mm to 100 mm, 10 mm to 75 mm, or 15 mm to 50 mm. The length (short side length) of each band member in the width direction B may be 2 mm to 30 mm, 3 mm to 25 mm, or 4 mm to 20 mm. The upper limit of the thickness of each band member is, for example, 200 μm, 150 μm, 100 μm, 80 μm, or 70 μm. The lower limit of the thickness of each band member is, for example, 30 μm, 40 μm, 45 μm, 50 μm, or the like.

[0013] First, the configuration and structure of a fixing member according to an embodiment will be described with reference to Figures 1 and 2. Figure 1(a) is a plan view of the fixing member according to this embodiment, and Figure 1(b) is a cross-sectional view taken along line Ib-Ib in Figure 1(a). Figure 2(a) is an exploded view of the fixing member according to the embodiment, and Figure 2(b) is a cross-sectional view taken along line IIb-IIb in Figure 2(a).

[0014] As shown in FIGS. 1( a) and 1(b), the fixing member 10 according to the embodiment has a band shape in plan view and a generally Z-shaped cross section. The fixing member 10 includes a first band member 1, a second band member 2, and a third band member 3, which are stacked one on top of the other. Specifically, the fixing member 10 includes the first band member 1, which corresponds to the top edge of the Z shape in its cross section, the second band member 2, which corresponds to the inclined line of the Z shape, and the third band member 3, which corresponds to the bottom edge of the Z shape. Therefore, the fixing member 10 is stacked in the following order: the first band member 1, the second band member 2, and the third band member 3. The fixing member 10 is stacked by folding the first band member 1, the second band member 2, and the third band member 3 along fold lines at a first joint 5 between one end 2a of the second band member 2 and the first band member 1, and a second joint 6 between the other end 2b of the second band member 2 and the third band member 3. Therefore, in the longitudinal direction A, the first joint portion 5 is located on one end side of the fixing member 10, and the second joint portion 6 is located on the other end side of the fixing member 10.

[0015] Hereinafter, the state in which the first band member 1, the second band member 2, and the third band member 3 of the fixing member 10 are held in a folded state is defined as a "stacked state," and the direction in which the first band member 1, the second band member 2, and the third band member 3 are stacked is defined as a "stacking direction." Note that in FIG. 1(b), for the sake of explanation, most of the first band member 1 and the second band member 2 and most of the second band member 2 and the third band member 3 are not in close contact with each other in the stacking direction, but in reality, they are in close contact with each other in the stacking direction. The length of the long side of the fixing member 10 in the stacked state is, for example, 5 mm or more, 10 mm or more, or 15 mm or more, and 70 mm or less, 50 mm or less, 45 mm or less, or 40 mm or less.

[0016] The fixing member 10 can be unfolded by removing the folds. For example, the first band member 1, the second band member 2, and the third band member 3 can be unfolded. For example, the first band member 1 is pulled in the stacking direction while the third band member 3 is fixed. The tight contact between the first band member 1 and the second band member 2 at locations other than the first joint 5 and the tight contact between the second band member 2 and the third band member 3 at locations other than the second joint 6 are then removed, and the folds are removed, allowing the first band member 1, the second band member 2, and the third band member 3 to be unfolded. As a result, as shown in FIGS. 2(a) and 2(b), the unfolded fixing member 10 assumes a single band shape in which the first band member 1, the second band member 2, and the third band member 3 are arranged in this order. Hereinafter, the state in which the fixing member 10 assumes a single band shape is defined as the "unfolded state." In the unfolded state, the fixing member 10 wraps around the fixed members, maintaining the shape of the bundled fixed members. In the following description, unless otherwise specified as "when the fixing member 10 is in an unfolded state," each component of the fixing member 10 will be described as the fixing member 10 in a stacked state. Note that Fig. 2(b) shows the fixing member 10 in an unfolded state when the third band member 3 is not adhered to the fixing target member. Note that the thickness of each component is exaggerated in the illustration for ease of understanding.

[0017] The first band member 1 is the part that forms the outermost surface when the fixing member 10 is fixed to the fixed member in a stacked state. The first band member 1 is the part of the unfolded fixing member 10 that is fixed to the fixed member and forms one end in the longitudinal direction A. The first band member 1 has a base material layer 11 (first base material layer), an adhesive layer 12 (first adhesive layer), and a tab portion 13.

[0018] The base material layer 11 is a strip-shaped inelastic member. The base material layer 11 has a surface 11a (one surface) facing the second band member 2 (and the third band member 3) and a surface 11b (the other surface) opposite to the surface 11a. An adhesive layer 12 and a tab portion 13 are provided on the surface 11a. The surface 11b corresponds to the outermost surface of the fixing member 10. The surface 11b of the base material layer 11 may be provided with an uneven surface by, for example, embossing, or may be decorated by printing. When viewed from the stacking direction, the long side length of the base material layer 11 is 5 mm or more and 100 mm or less, and the short side length of the base material layer 11 is 2 mm or more and 30 mm or less. The thickness of the base material layer 11 is, for example, 20 μm or more and 200 μm or less.

[0019] In this embodiment, the base layer 11 is non-extensible. In this specification, a non-extensible member includes not only a member that does not stretch, but also a member that is difficult to stretch. For example, when the load required to stretch the base layer 11 from its initial state along the longitudinal direction A is 25 N / 25 mm or more, the base layer 11 may be considered to be non-extensible.

[0020] One end 11c of the base material layer 11 in the longitudinal direction A is a portion that constitutes the first joint portion 5 described above. Furthermore, a portion of the end 11c of the base material layer 11 overlaps with one end 2a of the second band member 2 in the stacking direction. The tip of the end 11c in the longitudinal direction A is located outward from the one end 2a of the second band member 2. The other end 11d of the base material layer 11 in the longitudinal direction A is located between the first joint portion 5 and the second joint portion 6 in the longitudinal direction A. The end 11d is arranged so as not to overlap with the first joint portion 5 and the second joint portion 6 in the stacking direction.

[0021] The base material layer 11 is made of, for example, a resin film, paper, or nonwoven fabric. When the base material layer 11 is a resin film, the resin constituting the base material layer 11 is, for example, a synthetic resin such as a polyolefin such as polyethylene or polypropylene, polyester, polyamide, polyurethane, or polyvinyl chloride.

[0022] The adhesive layer 12 is a layer that maintains the laminated state of the fixing member 10. The adhesive layer 12 is detachably adhered to the base material layer 21 (described in detail later) of the second band member 2, and is also adhered to the adhesive layer 22 (described in detail later) of the second band member 2 at the first joint portion 5. Therefore, when the fixing member 10 is in a laminated state, the first band member 1 and the second band member 2 are in close contact with each other, and this laminated state is maintained. Furthermore, in the unfolded fixing member 10, the adhesive layer 12 is a layer that bonds the base material layer 11 and the member to be fixed. The thickness of the adhesive layer 12 is, for example, 5 μm or more and 100 μm or less.

[0023] One end 2a of the second band member 2 is adhered to a portion of the adhesive layer 12 provided at the end 11c (one end) of the base material layer 11. A tab portion 13 is adhered to a portion of the adhesive layer 12 provided at the end 11d (other end) of the base material layer 11.

[0024] The adhesive layer 12 is formed by applying an adhesive or the like to the surface 11a of the base material layer 11. The adhesive contained in the adhesive layer 12 is, for example, an acrylic adhesive, a rubber adhesive, a urethane adhesive, or a silicone adhesive.

[0025] The adhesive strength between the first band member 1 and the second band member 2 (i.e., the force applied when the adhesive layer 12 is peeled off from the base layer 21) is, for example, 0.1 N / 25 mm or more or 1 N / 25 mm or more, and 15 N / 25 mm or less or 10 N / 25 mm or less. When the adhesive strength is 0.1 N / 25 mm or more, it is possible to prevent the first band member 1 from unintentionally unfolding from the second band member 2. When the adhesive strength is 15 N / 25 mm or less, it is possible to detach the first band member 1 from the second band member 2 with an appropriate force.

[0026] The adhesive strength corresponds to the 90-degree peel force (the 90-degree peel force of the first band member 1 against the second band member 2) measured, for example, as follows, and serves as an index of the ease of unfolding the first band member 1 and the second band member 2 in the fixing member 10. First, the first band member 1 is processed to prepare a 25 mm × 50 mm test piece. Next, a 25 mm × 210 mm piece of paper is attached to half (25 mm × 25 mm) of the test piece to prepare a linear sample. Next, the second band member 2 (base layer 21), which serves as the adherend, is attached to a 50 mm × 100 mm aluminum plate. Here, the long side of the aluminum plate is positioned so that it extends along the direction in which the sample is peeled (peeling direction). Next, using a 2 kg roller, the exposed portion (25 mm × 25 mm) of the sample where the test piece is exposed is attached to the adherend. The adhesive strength is measured by peeling the sample from the adherend at a speed of 300 mm / min using a tensile tester or a device with equivalent performance. The 90-degree peel strength is the average value measured from the start of peeling to a distance of 25 mm.

[0027] In the unfolded fixing member 10, the adhesive layer 12 bonds the base material layer 11 and the fixed member with sufficient adhesive strength to maintain the shape of the assembled fixed member. When the fixed member is made of nonwoven fabric, the 90-degree peel strength of the adhesive layer 12 against the fixed member is, for example, 0.5 N / 25 mm or more, and the dynamic shear strength (also referred to as dynamic shear strength) of the adhesive layer 12 against the fixed member is, for example, 4 N / (25 mm x 25 mm) or more. The 90-degree peel strength of the adhesive layer 12 against the nonwoven fabric can be measured in the same manner as the 90-degree peel strength of the first band member 1 against the second band member 2 described above, except that the adherend attached to the aluminum plate is nonwoven fabric (PS-108-S, manufactured by Mitsui Chemicals, Inc.). The dynamic shear strength of the adhesive layer 12 against the nonwoven fabric can be measured, for example, as follows. First, the first band member 1 is processed to prepare a 25 mm x 50 mm test piece. Next, a 25 mm × 50 mm PET piece (thickness: 100 μm) was attached to half of the test piece (25 mm × 25 mm) to create a linear sample. Next, a nonwoven fabric (PS-108-S, manufactured by Mitsui Chemicals, Inc.) was attached to a 50 mm × 100 mm aluminum plate. The long side of the aluminum plate was positioned so that it extended along the direction in which the sample was peeled (peeling direction). Next, a 2 kg roller was used to attach the exposed portion of the sample (25 mm × 25 mm) to the adherend. The dynamic shear force was measured by pulling the sample from the adherend in the long side direction of the aluminum plate (180°) using a tensile tester or a device with equivalent performance at a speed of 30 mm / min. The dynamic shear force was measured as the maximum tensile load.

[0028] The tab portion 13 is a portion that serves as a grip when the fixing member 10 is unfolded, and is adhered to the adhesive layer 12 so as to protrude from the end 11d of the base material layer 11 in the longitudinal direction A. That is, the tab portion 13 is provided at the end 11d of the first band member 1 opposite the end 11c that constitutes the first joint 5. The tab portion 13 may be colored to easily determine the position of the tab portion 13 in the fixing member 10. In the longitudinal direction A, the tab portion 13 is exposed from the base material layer 11 by, for example, approximately 0.1 mm to 20 mm. Like the end 11d of the base material layer 11, the tab portion 13 is provided between the first joint 5 and the second joint 6 in the longitudinal direction A. The tab portion 13 is provided so as not to overlap the first joint 5 and the second joint 6 in the stacking direction. The tab portion 13 is made of, for example, a resin film, paper, or nonwoven fabric. The upper limit of the tab portion 13 is, for example, 200 μm, 150 μm, 100 μm, 80 μm, 70 μm, etc. The lower limit of the thickness of each band member is, for example, 30 μm, 40 μm, 45 μm, 50 μm, etc. It is about 80 μm.

[0029] For example, the fixing member 10 is fixed to the fixed member by the adhesive layer 12 with a 90-degree peel force of at least 0.5 N / 25 mm or more. Also, for example, the fixing member 10 is fixed to the fixed member by the adhesive layer 12 with a dynamic shear force of at least 4 N / (25 mm x 25 mm) or more.

[0030] The second band member 2 is a portion of the fixing member 10 that connects the first band member 1 and the third band member 3, and is sandwiched between the first band member 1 and the third band member 3. The second band member 2 has a base material layer 21 (second base material layer) and an adhesive layer 22 (second adhesive layer).

[0031] The base material layer 21 is a strip-shaped member and has a surface 21a (one surface) facing the third band member 3 and a surface 21b (other surface) opposite to surface 21a and facing the first band member 1. An adhesive layer 22 is provided on surface 21a, and the first band member 1 is located on surface 21b. At least a portion of the adhesive layer 12 of the first band member 1 is detachably adhered to surface 21b. When viewed from the stacking direction, the long side length of the base material layer 21 is 5 mm or more and 100 mm or less, and the short side length of the base material layer 21 is approximately the same as that of the base material layer 11. The thickness of the base material layer 21 is, for example, 20 μm or more and 200 μm or less. The upper limit of the thickness of the base material layer 21 may be 150 μm, 100 μm, 80 μm, or 60 μm. The thickness of the base layer 21 may be different from the thickness of the base layers 11 and 31 .

[0032] One end 21c of the base material layer 21 in the longitudinal direction A constitutes one end 2a of the second band member 2 described above and is covered by the first band member 1. When the fixing members 10 are stacked, the end 21c is folded back toward the first band member 1. Therefore, at the end 21c, a part of the surface 21a faces the first band member 1. The other end 21d of the base material layer 21 in the longitudinal direction A constitutes the other end 2b of the second band member 2 described above and is exposed from the first band member 1 when viewed from the stacking direction. In other words, the end 21d in the longitudinal direction A is located outside the end 11d of the first band member 1. Furthermore, the tip of the end 21d in the longitudinal direction A is located outside the second joint 6. That is, the tip of the end 21d protrudes from the second joint 6.

[0033] FIG. 3 is a schematic cross-sectional view of the base material layer 21 (second base material layer). As shown in FIG. 3, the base material layer 21 is an extensible member, unlike the base material layer 11. In this embodiment, the base material layer 21 is elastic. When a tensile load is applied to the base material layer 21 in the longitudinal direction A, the width of at least a portion of the base material layer 21 may narrow. The base material layer 21 does not have a single-layer structure, but has a multi-layer structure. In this embodiment, the base material layer 21 has a pair of skin layers 41, 42 and a core layer 43 sandwiched between the pair of skin layers 41, 42. The surface tack of each of the skin layers 41, 42 is lower than the surface tack of the core layer 43. By sandwiching the core layer 43 between such skin layers 41, 42, the handleability of the base material layer 21 is improved. For example, if the base layer is formed only from the core layer 43, a defect may occur in which one part of the core layer 43 sticks to another part within the roll around which the second band member is wound, and / or the core layer 43 may stretch when the second band member is unwound from the roll. On the other hand, by sandwiching the core layer 43 between the skin layers 41 and 42, the occurrence of the above defects can be effectively suppressed. In addition, for example, by adjusting the constituent materials and composition ratios of the skin layers 41 and 42 and the core layer 43, it is possible to appropriately adjust the ease of stretching the base layer 21 and therefore the fixing member 10, and the degree to which the fixing member 10 retains the shape of the fixed member that has been stretched, wrapped around, and fixed.

[0034] The skin layer 41 is a layer that constitutes the surface 21a of the base layer 21 and is in contact with the adhesive layer 22. The skin layer 42 is a layer that constitutes the surface 21b of the base layer 21. Like the base layer 11, each of the skin layers 41, 42 is inelastic and is made of, for example, a resin film, paper, or nonwoven fabric. When the skin layers 41, 42 are made of a resin film, the resin that constitutes the skin layers 41, 42 is, for example, a non-elastomeric synthetic resin such as a polyolefin such as polyethylene or polypropylene, polyester, polyamide, polyurethane, or polyvinyl chloride. In this embodiment, the main component of the skin layers 41, 42 is a non-elastomeric olefin-based resin. The main component of the skin layers 41, 42 being a non-elastomeric olefin-based resin means that the proportion of the non-elastomeric olefin-based resin in each of the skin layers 41, 42 is 51 mass% or more. Each of the skin layers 41, 42 may contain multiple resins or various additives. The multiple resins may be, for example, multiple non-elastomeric olefin-based resins. Different additives may be included in the skin layers 41 and 42. For example, the skin layers 41 and 42 may contain different pigments, etc., so that the skin layers 41 and 42 can be easily distinguished from each other.

[0035] The core layer 43 is a layer located between the skin layers 41 and 42 and has elasticity. The core layer 43 is a layer containing an elastomer. The type of elastomer is not particularly limited, and the core layer 43 contains at least a styrene-based elastomer or an olefin-based elastomer, for example. More specifically, examples of the elastomer include styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene / butylene-styrene block copolymer (SEBS), polyurethane, and polyolefin (ethylene copolymer (e.g., ethylene vinyl acetate, ethylene-propylene copolymer, ethylene-propylene-diene terpolymer), polypropylene copolymer, polypropylene homopolymer, etc.). In this embodiment, the elastomer that is the main component of the core layer 43 is an olefin-based elastomer. The core layer 43 may also contain an elastomer and other components (additives). For example, the resin material may include a stiffening agent (e.g., polyvinylstyrene, polystyrene, poly-α-methylstyrene, polyester, epoxy resin, polyolefin, coumarone-indene resin), a viscosity reducer, a plasticizer, a tackifier (e.g., aliphatic hydrocarbon tackifier, aromatic hydrocarbon tackifier, terpene resin tackifier, hydrogenated terpene resin tackifier), a dye, a pigment, an antioxidant, an antistatic agent, an adhesive, an antiblocking agent, a slip agent, a heat stabilizer, a light stabilizer, a foaming agent, glass bubbles, starch, a metal salt, a microfiber, etc. In this embodiment, the elastomer that is the main component of the core layer 43 is an olefin-based elastomer.

[0036] Here, an elastomer is defined as one that, after being stretched by applying a tensile force in one direction, tends to return to its original shape when the tensile force is released. An elastomer that tends to return to its original shape may be one that, for example, has an elongation of 150% or less when the tensile force is released after being stretched 300%. A non-elastomer is one that does not exhibit the properties of an elastomer. A non-elastomer may be one that, for example, has an elongation of only about 250 to 300% when the tensile force is released after being stretched 300%.

[0037] In the present embodiment, the skin layers 41, 42 have the same thickness, but this is not limited to this. To better suppress shrinkage of the second band member 2 and prevent significant differences in characteristics and behavior between the skin layer 41 side and the skin layer 42 side of the second band member 2, the thickness of each of the skin layers 41, 42 is, for example, 10% or more of the thickness of the base material layer 21. The thickness of each of the skin layers 41, 42 may be 12% or more, 15% or more, 18% or more, or 20% or more of the thickness of the base material layer 21. In particular, from the viewpoint of preventing rapid shrinkage of the base material layer 21, the total thickness of the skin layers 41, 42 may be 30% or more, 35% or more, 40% or more, or 45% or more of the thickness of the base material layer 21. From the viewpoint of the extensibility of the base layer 21, the total thickness of the skin layers 41, 42 may be 60% or less, 55% or less, or 50% or less of the thickness of the base layer 21. In the present embodiment, the total thickness of the skin layers 41, 42 is set to 30% or more and 60% or less of the thickness of the base layer 21.

[0038] The load required to stretch the second band member 2 200% from its initial state along the longitudinal direction A is, for example, 0.5 N / 25 mm or more or 1 N / 25 mm or more, and 20 N / 25 mm or less or 17 N / 25 mm or less. A load of 0.5 N / 25 mm prevents the second band member 2 from stretching immediately when the first band member 1 and the second band member 2 are unfolded. A load of 20 N / 25 mm or less allows the second band member 2 to be stretched with an appropriate force. Note that stretching the second band member 2 200% along the longitudinal direction A means that the long side length of the second band member 2 after stretching is 300% of the long side length of the second band member 2 before stretching (initial long side length).

[0039] The load when the second band member 2 is stretched 300% along the longitudinal direction A and then returned to 200% is, for example, 0 N / 25 mm or more or 0.1 N / 25 mm or more, and 1 N / 25 mm or less or 0.5 N / 25 mm or less. A low load of around 0 N / 25 mm can prevent the stretched second band member 2 from bouncing back due to contraction. A load of 1 N / 25 mm or less can prevent the second band member 2 from deforming the member to be fixed when the unfolded fixing member 10 is wrapped around the member to be fixed.

[0040] The load when the second band member 2 is stretched 300% along the longitudinal direction A and then returned to 250% is, for example, 0.2 N / 25 mm or more or 0.5 N / 25 mm or more, and 2.0 N / 25 mm or less or 1.5 N / 25 mm or less. When the load is within this numerical range and the stretched fixing member 10 is fixed to the fixed member, the fixed member can be held in a desired shape, such as a rolled state, without excessive deformation. In other words, the second band member 2 can have appropriate holding properties that prevent the fixed member from gradually becoming loose when fixed by the fixing member 10 due to being too soft.

[0041] The second band member 2, in which the total thickness of the skin layers 41, 42 is 30% or more of the thickness of the base layer 21, is stretched 300% along the longitudinal direction A, and the strain (%) when the load (return load) of the base layer 21 after stretching becomes 0.1 N / 25 mm or less is defined as the elongation degree of the second band member 2 in a free state. In this case, the elongation degree is 180% or more. In other words, after the second band member 2 is stretched 300% along the longitudinal direction A, the strain (%) of the second band member 2 in a free state The long side length is 280% or more of the initial long side length of the second band member 2. In this case, the skin layers 41, 42 effectively suppress shrinkage of the core layer 43. This prevents problems such as the second band member 2 being fixed in a curled state when an operator stretching the fixing member 10 accidentally releases the fixing member. When the total thickness of the skin layers 41, 42 is 35% or more of the thickness of the base layer 21, the degree of elongation is, for example, 200% or more.

[0042] The load and elongation can be measured in accordance with JIS K 7127:1995 (ISO 527-3:1995). For example, a 25 mm × 75 mm test piece is prepared. Next, both ends of the test piece in the longitudinal direction are covered with tape (e.g., filament tape #898 manufactured by 3M Japan Ltd.) so that the area of ​​the tensile portion of the test piece is 25 mm × 25 mm. Then, using a tensile tester or a device with equivalent performance, the test piece is elongated along the longitudinal direction at a speed of 300 mm / min. This allows the load and elongation to be measured.

[0043] By using the base material layer 21 having the above-described properties, the maximum long side length (maximum extended length) of the fixing member 10 when the fixing member 10 is in the unfolded state and the second band member 2 is extended can be at least 3.5 times (250% or more) the long side length of the fixing member 10 in the stacked state. For example, if the long side length of the fixing member 10 in the stacked state is set to 45 mm, the maximum long side length of the fixing member 10 in the unfolded state can be 160 mm or more. In addition, it is possible to reduce the dimensions (particularly the long side length of the fixing member 10) of the fixing member 10 in the stacked state that includes the base material layer 21 before extension. In this embodiment, the maximum long side length of the fixing member 10 in the unfolded state is set to 260 mm or more and 300 mm or less. In this case, the fixed member can be well restrained.

[0044] The adhesive layer 22, like the adhesive layer 12, is a layer that maintains the laminated state of the fixing member 10. The adhesive layer 22 is detachably adhered to the base layer 31 (described in detail below) of the third band member 3, and is also adhered to the adhesive layer 32 (described in detail below) of the third band member 3 at the second joint 6. Therefore, when the fixing member 10 is in a laminated state, the second band member 2 and the third band member 3 are in close contact with each other, maintaining their laminated state. The adhesive strength between the second band member 2 and the third band member 3 (i.e., the adhesive strength when the adhesive layer 22 is adhered to the base layer 31) is, for example, 0.1 N / 25 mm or more or 0.3 N / 25 mm, and 10 N / 25 mm or less or 5 N / 25 mm. The adhesive strength is 0.1 N / 25 mm or more. In this case, the second band member 2 can be prevented from unintentionally unfolding from the third band member 3. When the adhesive strength is 10 N / 25 mm or less, an appropriate force can be used to detach the second band member 2 from the third band member 3. The thickness of the adhesive layer 22 is, for example, 5 μm or more and 100 μm or less.

[0045] The portion of the adhesive layer 22 provided at the end 21c of the base material layer 21 constitutes one end 2a of the second band member 2. A part of the adhesive layer 22 at the end 21c faces the first band member 1 and is directly adhered to the adhesive layer 12. Therefore, the first joint 5 between the one end 2a of the second band member 2 and the first band member 1 is firmly adhered to each other by the adhesive layers 12, 22. Therefore, even when the fixing member 10 is deployed, the first band member 1 and the second band member 2 are integrated at the first joint 5, and separation can be effectively prevented. The portion of the adhesive layer 22 provided at the end 21d of the base material layer 21 constitutes the other end 2b of the second band member 2.

[0046] The adhesive layer 22 is formed by applying an adhesive or the like to the surface 21a of the base material layer 21. The adhesive contained in the adhesive layer 22 is the same as the adhesive that constitutes the adhesive layer 12, for example.

[0047] The third band member 3 is a portion of the fixing member 10 that is fixed to a fixed member in advance. The third band member 3 is a portion that becomes the other end of the unfolded fixing member 10 in the longitudinal direction A. The third band member 3 has a base material layer 31 (third base material layer) and an adhesive layer 32 (third adhesive layer).

[0048] The base material layer 31 is a strip-shaped inelastic member and has a surface 31a (one side) that serves as an attachment surface to a member to be fixed, and a surface 31b (other side) opposite to surface 31a and facing the second band member 2 and the first band member 1. An adhesive layer 32 is provided on surface 31a. The second band member 2 and the first band member 1 are stacked in this order on surface 31b. At least a portion of the adhesive layer 22 of the second band member 2 is detachably adhered to surface 31b. Furthermore, a portion of the adhesive layer 12 of the first band member 1 may be detachably adhered to surface 31b. When viewed in the stacking direction, the long side length of the base material layer 31 is 5 mm or more and 100 mm or less, and the short side length of the base material layer 31 is 2 mm or more and 30 mm or less. The thickness of the base material layer 31 is, for example, 20 μm or more and 200 μm or less.

[0049] One end 31c of the base material layer 31 in the longitudinal direction A is exposed from the first band member 1 when viewed from the stacking direction. In addition, the end 31d of the base material layer 31 in the longitudinal direction A is a portion that constitutes the second joint portion 6. When the fixing member 10 is in a stacked state, the end 31d is folded back toward the second band member 2. Therefore, at the end 31d, part of the surface 31a faces the second band member 2.

[0050] The base material layer 31 is made of, for example, a resin film, paper, or nonwoven fabric. The resin constituting the base material layer 31 is, for example, the same as the resin constituting the base material layer 11. Therefore, the base material layer 31 has non-extensibility similar to the base material layer 11.

[0051] The adhesive layer 32 is a layer that bonds the base layer 31 and the fixed member. A portion of the adhesive layer 32 provided on the end 31d of the base layer 31 faces the second band member 2 and is directly bonded to the adhesive layer 22. Therefore, the second joint 6 between the other end 2b of the second band member 2 and the third band member 3 is firmly bonded to each other by the adhesive layers 22, 32. Therefore, even when the fixing member 10 is unfolded, the second band member 2 and the third band member 3 are integrated at the second joint 6, and separation can be effectively prevented. The thickness of the adhesive layer 32 is, for example, 5 μm to 100 μm. The adhesive layer 32 is formed by applying an adhesive or the like to the surface 31a of the base layer 31. The adhesive contained in the adhesive layer 32 is, for example, the same adhesive as the adhesive that constitutes the adhesive layers 12, 22.

[0052] Next, an example of use of the fixing member 10 will be described with reference to Figure 4. Figure 4 is a schematic diagram showing a state in which the fixing member in a stacked state is attached to a fixed member. As shown in Figure 4, the fixed member, a disposable diaper 100, comprises a main body portion 101 having an absorbent body therein and a pair of leg openings, and a waist portion 102 provided on the upper side of the main body portion 101 and having a waist opening to prevent the disposable diaper 100 from slipping off when put on by a wearer. The main body portion 101 is made of, for example, paper, nonwoven fabric, and resin film. A pattern or the like may be printed on the outer surface of the main body portion 101.

[0053] When the fixing members 10 are in a stacked state, the exposed adhesive layer 32 of the fixing members 10 (see FIG. 1(b)) is attached to the main body portion 101 of the disposable diaper 100, which is the member to be fixed. At this time, since the dimensions of the fixing members 10 (particularly the length of the long sides of the fixing members 10) have been reduced, it is possible to attach the fixing members 10 to the main body portion 101 so as not to overlap with the waist portion 102. This makes it less likely that the fixing members 10 will come into contact with the wearer of the disposable diaper 100, thereby reducing discomfort to the wearer. Furthermore, since the fixing members 10 in a stacked state have the above-mentioned dimensions, it is less likely that a pattern or the like printed on the outer surface of the main body portion 101 will be hidden by the fixing members 10. This makes it possible to prevent the fixing members 10 from spoiling the aesthetic appearance of the disposable diaper 100.

[0054] Next, the effects of using the fixing member 10 according to this embodiment to fix a disposable diaper 100, which is a fixed member, will be described using the following reference examples. The fixing member 200 according to the reference examples (see FIG. 5(a) described later) differs from the fixing member 10 in that it includes a second belt member 202 instead of the second belt member 2, and is attached to the disposable diaper 100. In the second belt member 202 of the reference example, the total thickness of each skin layer is 20% of the thickness of the second base material layer. Furthermore, after being stretched 300% along the longitudinal direction A, the degree of elongation of the second belt member 202 in its free state is less than 180%.

[0055] When the disposable diaper 100 is used and then discarded, it is necessary to prevent the contents of the disposable diaper 100 from leaking out. In both the present embodiment and the reference example, the disposable diaper 100 is maintained in a rolled-up state using a fixing member, thereby preventing the contents from leaking out. To fix the rolled-up disposable diaper 100 with the fixing member, an operator first pinches and pulls the tab portion of the fixing member attached to the disposable diaper 100. This puts the fixing member into an unfolded state and stretches the second band member.

[0056] Here, due to carelessness or other reasons, the worker may accidentally let go of the tab portion while extending the second strap member. Alternatively, the worker may be forced to let go of the tab portion while extending the second strap member as needed. That is, the tab portion may be released unintentionally. Examples of worker errors include accidentally letting go of the fastening member while extending the second strap member, or accidentally letting go of the fastening member while changing grips on the fastening member during the process of extending it. Such worker errors are likely to occur, for example, immediately after using baby oil. Examples of situations in which the worker is forced to let go of the tab portion include when re-wrapping the disposable diaper 100 to prevent leakage of the contents of the diaper, or when responding to unexpected behavior by a nearby baby.

[0057] In the reference example, as shown in FIG. 5(a), if an operator releases the tab portion 13 while the second band member 202 is being stretched, the second band member 202 contracts strongly, attempting to restore its original shape like a spring. As a result, the position of the tab portion 13 after release is completely different from the position of the tab portion 13 before release while the second band member 202 is being stretched. In addition, as the second band member 202 contracts, the fixing member 200 may collide with the operator's hand holding the disposable diaper 100. Furthermore, the contraction of the second band member 202 may cause parts of the adhesive layer 22 of the second band member 202 to adhere to other parts, or the adhesive layers 12 and 22 to adhere to each other. As a result, the second band member 202 may be fixed in a rolled state. This adversely affects the usability of the fixing member 200, and in the worst case, the fixing member 200 may not be able to perform its function.

[0058] In contrast, in this embodiment, the total thickness of the skin layers 41, 42 of the base material layer 21 included in the second band member 2 is 30% or more of the thickness of the base material layer 21, and the degree of elongation of the second band member 2 in a free state after the second band member 2 is stretched 300% along the longitudinal direction A is 180% or more. Therefore, as shown in Fig. 5(b), if an operator releases the tab portion 13 while the second band member 2 is being stretched, contraction of the second band member 2 is suppressed compared to the reference example. In this case, the presence of the skin layers 41, 42 maintains the stretched state of the second band member 2 to some extent, so the position of the tab portion 13 after release remains substantially the same as the position of the tab portion 13 before release while the second band member 2 is being stretched. As a specific example, even if the tab portion 13 is pinched and pulled with the fingers and then released from the tab portion 13, the tab portion 13 does not spring back toward the disposable diaper 100 but rather tends to remain at a position away from the disposable diaper 100 (although the fixing member 10 may sag due to the influence of gravity, the distance from the disposable diaper 100 is maintained). Therefore, the difference between the distance from the tab portion 13 to the disposable diaper 100 after release and the distance from the tab portion 13 to the disposable diaper 100 before release while the second belt member 2 is stretched is smaller than that in the reference example. This is in contrast to the case of FIG. 5(a), where the fixing member 10 is rolled up as the second belt member 2 contracts and this state is fixed by the adhesive layers 12, 22. That is, in this embodiment, unlike the above-described reference example, unintended adhesion between the adhesive layer 12 and the adhesive layer 22 and / or unintended adhesion between one part of the adhesive layer 12 or 22 and another part can be suppressed. Therefore, even if an operator makes a mistake or a situation occurs in which the operator is forced to let go of the disposable diaper 100, the fixing member 10 can be made easy to use. Furthermore, by maintaining the stretched state of the second belt member 2 to a certain extent, the tab portion 13 and the like that spring back are less likely to hit the fingers of the operator holding the disposable diaper 100. Therefore, the fixing member 10 can be prevented from causing pain to the operator.

[0059] Furthermore, when the fixing member is wound around the disposable diaper 100 with the second belt member in a stretched state, if the second belt member contracts, the wrapping force applied to the disposable diaper 100 increases. Therefore, when the rolled-up disposable diaper 100 is restrained by the fixing member 200 according to the reference example, the disposable diaper 100 is restrained with a strong restraining force, as shown in FIG. 6(a). As a result, while the rolled-up state of the disposable diaper 100 is maintained, the rolled-up disposable diaper 100 is significantly deformed. Due to such deformation, there is a risk that the contents of the disposable diaper 100 restrained by the fixing member 200 may leak.

[0060] In contrast, in this embodiment, the stretched state of the second belt member 2 is maintained to a certain extent as described above. When the rolled-up disposable diaper 100 is restrained by the fixing member 10 including such a second belt member 2, the disposable diaper 100 is restrained with an appropriate restraining force, as shown in FIG. 6(b). This allows the rolled-up state of the disposable diaper 100 to be maintained in a good condition. Furthermore, the rolled-up disposable diaper 100 is less likely to be deformed by the fixing member 10. Therefore, the contents of the disposable diaper 100 restrained by the fixing member 10 are less likely to leak.

[0061] In this embodiment, the total thickness of the skin layers 41, 42 is 35% or more of the thickness of the base material layer 21, and the elongation may be 200% or more. In this case, the presence of the skin layers 41, 42 more effectively suppresses shrinkage of the second band member 2.

[0062] In this embodiment, the total thickness of the skin layers 41, 42 is 60% or less of the thickness of the base material layer 21. Therefore, when the fixing member 10 is used, the second band member 2 can be stretched without requiring excessive force.

[0063] In this embodiment, the thickness of each of the skin layers 41, 42 is 10% or more of the thickness of the base material layer 21. Therefore, it is possible to more effectively suppress shrinkage of the second band member 2, and to suppress large differences in characteristics and behavior between the skin layer 41 side and the skin layer 42 side of the second band member 2.

[0064] In this embodiment, the load when the second band member 2 is stretched 300% along the longitudinal direction A and then returned to 250% is 0.5 N / 25 mm or more and 2.0 N / 25 mm or less. In this case, when the stretched fixing member 10 is fixed to the fixed member, the fixed member is not excessively deformed and the fixed member can be maintained in a desired shape, such as a rolled state.

[0065] In this embodiment, the main component of each of the skin layers 41 and 42 is a non-elastomeric olefin-based resin, and the elastomer that is the main component of the core layer may be an olefin-based elastomer.

[0066] In this embodiment, the fixing member 10 includes a tab portion 13 located at the other end opposite to one end that constitutes the first bonding portion 5 in the base material layer 11 included in the first band member 1. Therefore, by pinching the tab portion 13, an operator can easily detach the adhesive layer 12 from the base material layer 21 and the adhesive layer 22 from the base material layer 31.

[0067] In this embodiment, the fixing member 10 is attached to a disposable baby diaper 100, and the maximum extension length of the fixing member 10 may be 260 mm or more and 300 mm or less. As shown in FIG. 7 , when the baby diaper is worn on an infant I, the first belt member 1, the second belt member 2, and the third belt member 3 may unintentionally unfold. Here, the maximum extension length of the fixing member 10 is 260 mm or more. Therefore, even if the infant I bites the single belt-shaped fixing member 10, as shown in FIG. 8 , the fixing member 10 can remain connected to the baby diaper. This prevents accidents such as the fixing member 10 being cut and the infant I accidentally swallowing a part of the fixing member 10. In addition, by setting the maximum extension length of the fixing member 10 to 300 mm or less, accidents such as the single belt-shaped fixing member 10 wrapping around the neck of the infant I can be prevented.

[0068] The present invention has been described in detail above based on the above embodiment. However, the present invention is not limited to the above embodiment. The present invention can be further modified within the scope of its gist. For example, an opening may be provided in the second band member, or the width of the second band member may be shorter than both the widths of the first and third band members. In these cases, the second band member can be easily stretched. In addition, even if an adhesive layer is not provided on the second band member, the stacked state of the fixing members can be maintained. Note that the second band member may be provided with multiple openings. Furthermore, the shape of the opening is not particularly limited, and may be circular, elliptical, or polygonal when viewed from the stacking direction.

[0069] In the above embodiment, the other surface of the first base material layer corresponds to the outermost surface of the fixing layer, but this is not limited thereto. For example, an outermost layer may be provided on the other surface. The outermost layer may be provided so as to cover the entire other surface. The outermost layer is fixed to the first base material layer, for example, via an adhesive or the like (not shown). The outermost layer may be made of the same material as the first base material layer. The outermost layer may be processed to resemble the texture of the member to be fixed. For example, the outermost layer may be made of a resin film having an uneven surface formed by embossing or the like. When the member to be fixed is made of paper or nonwoven fabric, its surface has an uneven surface. In this case, it is easier to achieve a unified appearance and feel of the fixing member 10 and the member to be fixed. The outermost layer may be made of a resin film having an uneven surface formed thereon. The outermost layer may also be decorated by printing or the like.

[0070] The first band member of the above embodiment may include a hooking portion configured to be physically hooked onto the member to be fixed when the fixing member is deployed. The hooking portion may be provided with, for example, a plurality of hooks. For example, when the member to be fixed is a nonwoven fabric or the like, the first band member can be securely fixed to the member to be fixed. [Example]

[0071] The present invention will be described in more detail by the following examples, but the present invention is not limited to these examples.

[0072] Example 1 In Example 1, a fixing member having the cross-sectional shape shown in FIG. 1(a) of the above embodiment was formed. Specifically, one end of the second band member was attached to the first band member, and the other end of the second band member was attached to the third band member to form a linearly arranged, integrated member. Then, one end of the second band member was folded back, and a portion of the third band member was folded back, and the first to third band members were folded and stacked to form the fixing member. The long side length of the first band member was 30 mm, the long side length of the second band member was 46 mm, and the long side length of the third band member was 50 mm. By folding back portions of the second band member and the third band member as described above, the long side length of the fixing member was 45 mm.

[0073] The first band member includes a 70 μm thick olefin film (first base layer), a layer of adhesive (first adhesive layer), and a tab portion made of a 95 μm thick olefin film. In Example 1, the adhesive constituting the first adhesive layer is a styrene-isoprene-styrene adhesive based on "Quintac 3270" (manufactured by Zeon Corporation).

[0074] The second band member includes a film (second base layer, 80 μm thick) having a pair of skin layers and a core layer positioned between the pair of skin layers, and a layered pressure-sensitive adhesive (second adhesive layer). Each of the pair of skin layers is primarily composed of a non-elastomeric olefin-based resin (PP block copolymer). The core layer is primarily composed of an elastomeric olefin-based resin (PP / PE copolymer). The thickness of each of the pair of skin layers is 12.0 μm, and the thickness of the core layer is 56.0 μm. Therefore, in Example 1, the total thickness of the pair of skin layers is 30% of the thickness of the second base layer. The pressure-sensitive adhesive constituting the second adhesive layer is a styrene-isoprene-styrene-based pressure-sensitive adhesive based on "D1107 JSP" (manufactured by Kraton Polymer Japan Co., Ltd.). The adhesive strength of the pressure-sensitive adhesive used in the second band member is weaker than that of the pressure-sensitive adhesive used in the first band member. In Example 1, the load when the second band member was stretched 300% along the longitudinal direction and then returned to 250% was 1.16 N / 25 mm, and the load when returned to 200% was 0.20 N / 25 mm.

[0075] The third band member includes a 70 μm thick olefin film (third base layer) and a layer of adhesive (third adhesive layer). The adhesive constituting the third adhesive layer is the same as the adhesive constituting the first adhesive layer.

[0076] Example 2 In Example 2, a fixing member was formed in the same manner as in Example 1, except that a second base layer having a pair of skin layers with a thickness of 14.4 μm and a core layer with a thickness of 51.2 μm was used. Therefore, in Example 2, the total thickness of the pair of skin layers was 36% of the thickness of the second base layer. After the second band member in Example 2 was elongated 300% along the longitudinal direction, the load when it was returned to 250% was 0.80 N / 25 mm, and the load when it was returned to 200% was 0.01 N / 25 mm.

[0077] (Comparative Example 1) In Comparative Example 1, a fixing member was formed in the same manner as in Example 1, except that a second base layer having a pair of skin layers with a thickness of 8.0 μm and a core layer with a thickness of 64.0 μm was used. Therefore, in Comparative Example 1, the total thickness of the pair of skin layers was 20% of the thickness of the second base layer. After the second band member in Comparative Example 1 was elongated 300% along the longitudinal direction, the load when it was returned to 250% was 2.31 N / 25 mm, and the load when it was returned to 200% was 1.26 N / 25 mm.

[0078] <Stretchability of the second base layer> For each of Examples 1 and 2 and Comparative Example 1, the stretchability of the second base material layer was measured twice using the same method as described above. One of the stretchability characteristics was the degree of elongation of the second base material layer in its free state after it was stretched 300% along the longitudinal direction. The measurement results are shown in Table 1 below.

[0079] [Table 1]

[0080] For each of Examples 1 and 2 and Comparative Example 1, a commercially available baby diaper was used as the fixed member, and other stretch characteristics of the second base material layer were confirmed. First, the shape of the fixing member in a free state after stretching was confirmed. First, a third band member of the fixing member, with a width (short side length) of 15 mm and a long side length of 45 mm, was attached to the outer surface of the main body of the baby diaper. Next, an operator unfolded the fixing member while grasping the rolled-up baby diaper. Next, the operator pinched the tab portion of the fixing member in the unfolded state and stretched the second base material layer along the longitudinal direction. At this time, the operator stretched the second base material layer so that the degree of elongation of the second base material layer in the longitudinal direction was 100% or more. After that, the operator released the tab portion to confirm the shape of the fixing member in a free state.

[0081] In both Examples 1 and 2, as shown in FIG. 5(b), the contraction of the second base material layer (particularly the core layer) was suppressed by the skin layer, and a stretched, band-shaped fixing member was observed. Furthermore, the position of the tab portion in the free state was almost unchanged from the position of the tab portion during the stretching of the second band member before release. On the other hand, in Comparative Example 1, as shown in FIG. 5(a), the fixing member was observed in a state in which the second base material layer was contracted. The position of the tab portion in the free state was completely different from the position of the tab portion during the stretching of the second band member before release. Additionally, in Comparative Example 1, the contraction of the second base material layer caused the fixing member to collide with the hand of a worker holding the baby diaper.

[0082] Second, the state of a wet baby diaper restrained by the fastening member was confirmed. First, a third band member of the fastening member, measuring 15 mm in width (short side length) and 45 mm in length, was attached to the outer surface of the main body of the baby diaper. Next, the main body was allowed to absorb 200 ml of room temperature water and left to stand for 2 minutes. Next, an operator held the rolled-up baby diaper while unfolding the fastening member. Next, the operator pinched the tab portion of the unfolded fastening member to stretch the second base layer along the longitudinal direction. Thereafter, the fastening member was wrapped around the baby diaper, and a first band member was attached to a different outer surface of the main body. The shape of the baby diaper after being left to stand for 2 minutes was visually observed.

[0083] In both Examples 1 and 2, the shape of the baby diaper rolled up by the worker was maintained by the fixing members, as shown in FIG. 6(b). On the other hand, in Comparative Example 1, the baby diaper was tightly restrained by the fixing members. Therefore, as shown in FIG. 6(a), the portion of the baby diaper wrapped around the fixing members was significantly deformed. Therefore, in Comparative Example 1, water absorbed in the baby diaper may leak out. In addition, in Comparative Example 1, the shape of the baby diaper rolled up by the worker was significantly deformed so that the leg openings opened. Therefore, in Comparative Example 1, if the state of the baby diaper rolled up so that the contents are enclosed is maintained by the fixing members, the contents may leak out. [Explanation of symbols]

[0084] 1...first belt member, 2...second belt member, 2a...one end, 2b...other end, 3...third belt member, 5...first joint, 6...second joint, 10...fixing member, 11...base material layer (first base material layer), 11a, 21a, 31a...surface (one side), 11b, 21b, 31b...surface (other side), 12...adhesive layer (first adhesive layer), 13...tab portion, 21...base material layer (second base material layer), 22...adhesive layer (second adhesive layer), 31...base material layer (third base material layer), 32...adhesive layer (third adhesive layer), 100...disposable diaper, A...longitudinal direction, B...width direction, I...infant. In addition to the embodiments, the following aspects will be noted. (Appendix 1) A fixing member comprising a first band member, a second band member, and a third band member stacked one on top of another, the fixing member holding the first to third band members in a folded state, a first joint portion between the second band member and the first band member, and a second joint portion between the second band member and the third band member, the first belt member has a belt-shaped first base material layer and a first adhesive layer provided on one surface of the first base material layer, the second belt member has a belt-shaped second base material layer located between the first belt member and the third belt member, and a second adhesive layer provided on one surface of the second base material layer, the third belt member has a belt-shaped third base material layer and a third adhesive layer provided on one surface of the third base material layer, At least a portion of the first adhesive layer is detachably adhered to the other surface of the second base material layer, At least a portion of the second adhesive layer is detachably adhered to the other surface of the third base material layer, the second base material layer has a pair of skin layers and a core layer located between the pair of skin layers and containing an elastomer; the total thickness of the pair of skin layers is 30% or more of the thickness of the second base material layer; After the second band member is stretched 300% in one direction, the degree of elongation of the second band member in a free state is 180% or more. Fixing member. (Appendix 2) the total thickness of the pair of skin layers is 35% or more of the thickness of the second base material layer; 2. The fixing member according to claim 1, wherein the elongation is 200% or more. (Appendix 3) 3. The fixing member according to claim 1, wherein the total thickness of the pair of skin layers is 60% or less of the thickness of the second base material layer. (Appendix 4) 4. The fixing member according to any one of claims 1 to 3, wherein the thickness of each of the pair of skin layers is 10% or more of the thickness of the second base material layer. (Appendix 5) A fixing member described in any one of Appendices 1 to 4, wherein the load when the second band member is stretched 300% along the one direction and then returned to 250% is 0.5 N / 25 mm or more and 2.0 N / 25 mm or less. (Appendix 6) a main component of each of the pair of skin layers is a non-elastomeric olefin-based resin, 6. The fixing member according to any one of claims 1 to 5, wherein the elastomer that is a main component of the core layer is an olefin-based elastomer. (Appendix 7) The fixing member according to any one of appendixes 1 to 6, further comprising a tab portion located at the other end of the first band member opposite to the one end that constitutes the first joint portion. (Appendix 8) A fixing member according to any one of Supplementary Notes 1 to 7; a fixed member to which the fixing member is adhered; An absorbent article comprising: (Appendix 9) The maximum extension length of the fixing member is 260 mm or more and 300 mm or less, 9. The absorbent article of claim 8, wherein the absorbent article is a baby diaper.

Claims

[Claim 1] A fixing member comprising a first band member, a second band member, and a third band member stacked on one another, the fixing member holding the first to third band members in a folded state, a first joint portion between the second band member and the first band member, and a second joint portion between the second band member and the third band member, the first belt member has a belt-shaped first base material layer and a first adhesive layer provided on one surface of the first base material layer, the second belt member has a belt-shaped second base material layer located between the first belt member and the third belt member, and a second adhesive layer provided on one surface of the second base material layer, the third belt member has a belt-shaped third base material layer and a third adhesive layer provided on one surface of the third base material layer, At least a portion of the first adhesive layer is detachably adhered to the other surface of the second base material layer, At least a portion of the second adhesive layer is detachably adhered to the other surface of the third base material layer, the second substrate layer has a pair of skin layers and a core layer located between the pair of skin layers and containing an elastomer; a total thickness of the pair of skin layers being 30% or more of a thickness of the second base material layer; After the second band member is stretched 300% in one direction, the degree of elongation of the second band member in a free state is 180% or more. Fixing member.

Images