Hook-and-loop fastener female component

Abstract

The present invention provides a hook-and-loop fastener female component having an engaging layer made of nonwoven fabric, which effectively suppresses fuzzing of the engaging layer after the male hook-and-loop fastener is engaged and then separated. It also provides a hook-and-loop fastener having the female hook-and-loop fastener of the present invention. It also provides a sanitary product having the female hook-and-loop fastener of the present invention. [Solution] The female hook-and-loop fastener component of the present invention is a hook-and-loop fastener component having an engaging layer that can engage with a male hook-and-loop fastener component and a physical layer that holds the engaging layer, wherein the engaging layer comprises a fibrous nonwoven fabric, the female hook-and-loop fastener component has an embossed pattern, and the fibers have bonding points in areas of the female hook-and-loop fastener component that do not have the embossed pattern.

Description

[Technical Field]

[0001] The present invention relates to a female member of a hook-and-loop fastener.The present invention also relates to a hook-and-loop fastener having the female member of the hook-and-loop fastener of the present invention.The present invention also relates to a sanitary article having the female member of the hook-and-loop fastener of the present invention. [Background technology]

[0002] Various hook-and-loop fasteners have been proposed as components for articles such as diapers, masks, and other hygiene products (see, for example, Patent Documents 1 and 2). When used in diapers, for example, the female hook-and-loop fastener component is generally attached to the front of the waist area of ​​the diaper, and the hook-and-loop fastener is completed by engaging with the male hook-and-loop fastener component (typically having an engaging hook) fixed to the side of the diaper. The hook-and-loop fastener is required to be able to be attached and detached multiple times.

[0003] In recent years, nonwoven fabrics have been used in many of the engaging layers (layers with which the engaging hooks of the male hook-and-loop fasteners can engage) of the female hook-and-loop fastener components used in sanitary products (particularly disposable diapers, supports, masks, etc.).

[0004] However, conventional hook-and-loop fastener female components with engaging layers made of nonwoven fabric do not have sufficient engaging strength with the hook-and-loop fastener male components. In particular, the engaging layer becomes fuzzy after the male hook-and-loop fastener is engaged and then separated, resulting in a significant decrease in engaging strength when re-engaging. Furthermore, the fuzzy engaging layer can also cause problems, such as babies accidentally eating the fuzzy part. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2009-527315 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-125337 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a female hook-and-loop fastener component having an engaging layer that uses a nonwoven fabric, which effectively suppresses fuzzing of the engaging layer after engaging and then peeling off a male hook-and-loop fastener component. Another object of the present invention is to provide a hook-and-loop fastener that includes the female hook-and-loop fastener component of the present invention. Another object of the present invention is to provide a sanitary product that includes the female hook-and-loop fastener component of the present invention. [Means for solving the problem]

[0007] The female member of the hook-and-loop fastener of the present invention is A hook-and-loop fastener female component having an engaging layer that can be engaged with a hook-and-loop fastener male component and a physical layer that holds the engaging layer, the engagement layer comprises a fibrous nonwoven fabric; The female member of the hook-and-loop fastener has an embossed pattern, The fibers have bonding points in the areas of the female hook-and-loop fastener that do not have the embossed pattern.

[0008] In one embodiment, the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern is 10 mm or less on any line in the MD direction.

[0009] In one embodiment, the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern is 7 mm or less on any line in the MD direction.

[0010] In one embodiment, the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern is 1 mm or more on any line in the MD direction.

[0011] In one embodiment, the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern is 3 mm or more on any line in the MD direction.

[0012] In one embodiment, the embossing width W of the plurality of embossments constituting the embossing pattern is 0.1 mm or more.

[0013] In one embodiment, the embossing width W of the plurality of embossments constituting the embossing pattern is 0.5 mm or more.

[0014] In one embodiment, the embossing width W of the plurality of embossments constituting the embossing pattern is 3.0 mm or less.

[0015] In one embodiment, the embossing width W of the plurality of embossments constituting the embossing pattern is 1.5 mm or less.

[0016] In one embodiment, the ratio L / W of the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern to the emboss width W of the plurality of embossments constituting the embossed pattern is 0.3 to 100.

[0017] In one embodiment, the ratio L / W of the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern to the emboss width W of the plurality of embossments constituting the embossed pattern is 2-10.

[0018] In one embodiment, the ratio of the area of ​​the welded portion formed by the embossed pattern to the area of ​​the entire surface of the female component of the hook-and-loop fastener is 35% or less.

[0019] In one embodiment, the ratio of the area of ​​the welded portion formed by the embossed pattern to the area of ​​the entire surface of the female component of the hook-and-loop fastener is 5% or more.

[0020] In one embodiment, the ratio of the area of ​​the welded portion formed by the embossed pattern to the area of ​​the entire surface of the female component of the hook-and-loop fastener is 12% or more.

[0021] In one embodiment, the surface of the fiber and the surface of the physical property layer facing the engagement layer contain the same type of polymer.

[0022] In one embodiment, the polymer is a polyolefin.

[0023] In one embodiment, the nonwoven fabric is a thermal point bonded nonwoven fabric.

[0024] In one embodiment, the thermal point bonded nonwoven is a spunbond nonwoven.

[0025] In one embodiment, the total basis weight, which is the sum of the basis weight of the nonwoven fabric in the engagement layer and the basis weight of the nonwoven fabric in the physical property layer, is 60 g / m 2 The following is the result.

[0026] In one embodiment, the total basis weight, which is the sum of the basis weight of the nonwoven fabric in the engagement layer and the basis weight of the nonwoven fabric in the physical property layer, is 47 g / m 2 The following is the result.

[0027] In one embodiment, the total basis weight, which is the sum of the basis weight of the nonwoven fabric in the engagement layer and the basis weight of the nonwoven fabric in the physical property layer, is 30 g / m 2 That's all.

[0028] The hook-and-loop fastener of the present invention comprises a hook-and-loop fastener female member of the present invention and a hook-and-loop fastener male member that engages with the hook-and-loop fastener female member.

[0029] The sanitary product of the present invention has the female hook-and-loop fastener member of the present invention. [Effects of the Invention]

[0030] According to the present invention, it is possible to provide a female hook-and-loop fastener component having an engaging layer that uses a nonwoven fabric, which effectively suppresses fuzzing of the engaging layer after engaging and then peeling off the male hook-and-loop fastener component. It is also possible to provide a hook-and-loop fastener having such a female hook-and-loop fastener component. It is also possible to provide a sanitary product having such a female hook-and-loop fastener component. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a schematic plan view of a female member of a hook-and-loop fastener according to a preferred embodiment of the present invention. [Figure 2] FIG. 10 is a schematic plan view of a female member of a hook-and-loop fastener according to another preferred embodiment of the present invention. [Figure 3] FIG. 10 is a schematic plan view of a female member of a hook-and-loop fastener according to yet another preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0032] <Hook-and-loop fastener female component> The female hook-and-loop fastener component of the present invention is a hook-and-loop fastener component having an engaging layer that can engage with a male component (also called a mechanical hook component). The engaging layer of the female hook-and-loop fastener component is specifically a layer that can engage with the engaging hooks of the male hook-and-loop fastener component (or those having equivalent properties). A hook-and-loop fastener component having the female hook-and-loop fastener component of the present invention and a male hook-and-loop fastener component that engages with the female hook-and-loop fastener component is a hook-and-loop fastener component.

[0033] The female hook-and-loop fastener component of the present invention has an engaging layer engageable with the male hook-and-loop fastener component and a physical layer that holds the engaging layer. The female hook-and-loop fastener component of the present invention may have any other appropriate component as long as it has such an engaging layer and physical layer and does not impair the effects of the present invention. The female hook-and-loop fastener component of the present invention preferably consists of an engaging layer engageable with the male hook-and-loop fastener component and a physical layer that holds the engaging layer.

[0034] The thickness of the female component of the hook-and-loop fastener of the present invention can be set to any appropriate thickness depending on the purpose. The thickness of the female component of the hook-and-loop fastener of the present invention is typically preferably 0.2 mm to 5.0 mm, more preferably 0.3 mm to 4.0 mm, even more preferably 0.5 mm to 3.0 mm, and particularly preferably 0.5 mm to 2.0 mm. In the present invention, the thickness of the female component of the hook-and-loop fastener (nonwoven fabric) is measured according to the method described below.

[0035] The engagement layer includes a nonwoven fiber fabric. The engagement layer may be a single layer or may have two or more layers. The engagement layer is preferably made of only a nonwoven fiber fabric.

[0036] The engagement layer may contain only one type of fibrous nonwoven fabric, or two or more types.

[0037] Examples of fibrous nonwoven fabrics included in the engagement layer include spunbond nonwoven fabrics, thermally bonded nonwoven fabrics, adhesively bonded nonwoven fabrics, air-through nonwoven fabrics, meltblown nonwoven fabrics, spunbonded meltblown spunbonded nonwoven fabrics, spunbonded meltblown meltblown spunbonded nonwoven fabrics, unbonded nonwoven fabrics, electrospun nonwoven fabrics, flashspun nonwoven fabrics (e.g., DuPont's TYVEK™), and carded nonwoven fabrics. Here, spunbonded nonwoven fabrics can be said to be thermally point bonded in that the fibers are thermally fused. On the other hand, thermally bonded nonwoven fabrics are thermally point bonded carded nonwoven fabrics, and therefore, in this specification, spunbonded nonwoven fabrics and thermally bonded nonwoven fabrics are clearly different. One preferred embodiment of the fibrous nonwoven fabric included in the engagement layer is such a thermally point bonded nonwoven fabric. Among the above nonwoven fabrics, preferred are spunbond nonwoven fabrics, thermalbond nonwoven fabrics, adhesive-bonded nonwoven fabrics, air-through nonwoven fabrics, meltblown nonwoven fabrics, spunbond meltblown spunbond nonwoven fabrics, and spunbond meltblown meltblown spunbond nonwoven fabrics, more preferred are spunbond nonwoven fabrics, thermalbond nonwoven fabrics, and air-through nonwoven fabrics, even more preferred are spunbond nonwoven fabrics and air-through nonwoven fabrics, and particularly preferred are spunbond nonwoven fabrics. For example, by using a spunbond nonwoven fabric (thermal point-bonded spunbond nonwoven fabric), a thermal bond nonwoven fabric (thermal point-bonded carded nonwoven fabric), or an air-through nonwoven fabric (hot air-bonded air-laid nonwoven fabric) as the nonwoven fabric of the fibers contained in the engagement layer, the fibers constituting the nonwoven fabric contained in the engagement layer may have bonding points. As a result, when the female component of the hook-and-loop fastener of the present invention has an embossed pattern, not only do the fibers constituting the nonwoven fabric contained in the engagement layer have firm bond points due to the embossing process in the embossed pattern portion, but also in areas without the embossed pattern, the fibers constituting the nonwoven fabric contained in the engagement layer have bond points.By achieving such a structure, the female hook-and-loop fastener component of the present invention has an engaging layer made of a nonwoven fabric, and can effectively suppress fuzzing of the engaging layer after the male hook-and-loop fastener component is engaged and then separated. In contrast, if a spunlace nonwoven fabric is used as the nonwoven fabric fiber contained in the engaging layer, the fibers constituting the nonwoven fabric contained in the engaging layer are unlikely to have bonding points. Therefore, when the female hook-and-loop fastener component of the present invention has an embossed pattern, the embossed pattern portion provides firm bonding points between the fibers constituting the nonwoven fabric contained in the engaging layer due to the embossing process, but in areas without the embossed pattern, the fibers constituting the nonwoven fabric contained in the engaging layer are unlikely to have bonding points between them. This may prevent the effects of the present invention from being realized.

[0038] Here, the fibers constituting the nonwoven fabric of the fibers contained in the engagement layer having bonding points typically mean that fusion points between the fibers can be confirmed when the nonwoven fabric of the fibers contained in the engagement layer is observed under a microscope or the like.

[0039] When the fibrous nonwoven fabric contained in the engagement layer is a spunbond nonwoven fabric, the number of bond points per unit area confirmed when the fibrous nonwoven fabric contained in the engagement layer is observed with an optical microscope in an area without an embossed pattern, within a field of view of 17 mm × 13 mm (7.5x magnification), is preferably 10 to 200, more preferably 30 to 150, and even more preferably 50 to 100. When the fibrous nonwoven fabric contained in the engagement layer is a spunbond nonwoven fabric, by having the number of bond points per unit area confirmed when the fibrous nonwoven fabric contained in the engagement layer is observed with an optical microscope fall within the above range, the female component of the hook-and-loop fastener of the present invention can more effectively suppress pilling of the engagement layer after engaging and then peeling off the male component of the hook-and-loop fastener.

[0040] When the fibrous nonwoven fabric contained in the engagement layer is an air-through nonwoven fabric, the number of bonding points per unit area confirmed when the fibrous nonwoven fabric contained in the engagement layer is observed with an SEM in a 1.3 mm × 1.0 mm field of view (100x magnification) in an area without an embossed pattern is preferably 1 or more, more preferably 2 to 100, and even more preferably 5 to 50. When the fibrous nonwoven fabric contained in the engagement layer is an air-through nonwoven fabric, by having the number of bonding points per unit area confirmed when the fibrous nonwoven fabric contained in the engagement layer is observed with an SEM falling within the above range, the female component of the hook-and-loop fastener of the present invention can more effectively suppress pilling of the engagement layer after engaging and then peeling off the male component of the hook-and-loop fastener.

[0041] When the fibrous nonwoven fabric contained in the engagement layer is a thermal bonded nonwoven fabric, the number of bond points per unit area confirmed when the fibrous nonwoven fabric contained in the engagement layer is observed with an optical microscope in an area without an embossed pattern, within a field of view of 17 mm × 13 mm (7.5x magnification), is preferably 10 to 200, more preferably 30 to 150, and even more preferably 50 to 100. When the fibrous nonwoven fabric contained in the engagement layer is a thermal bonded nonwoven fabric, by having the number of bond points per unit area confirmed when the fibrous nonwoven fabric contained in the engagement layer is observed with an optical microscope fall within the above range, the female component of the hook-and-loop fastener of the present invention can more effectively suppress pilling of the engagement layer after engaging and then peeling off the male component of the hook-and-loop fastener.

[0042] The nonwoven fibers included in the engaging layer may include fibers of a homogeneous structure, or may include composite fibers of a bicomponent structure, such as sheath-core, side-by-side, islands-in-the-sea, and other bicomponent structures. For a detailed description of nonwoven fabrics, see, for example, "Nonwoven Fabric Primer and Reference Sampler," E.A. Vaughn, Association of the Nonwoven Fabrics Industry, 3rd Edition (1992).

[0043] Any suitable fibers may be used as the fibers constituting the nonwoven fabric contained in the engagement layer as long as the effects of the present invention are not impaired. Such fibers include, for example, polyolefins (such as polypropylene and polyethylene), polyesters, polyamides, polyurethanes, elastomers, rayon, cellulose, acrylics, copolymers thereof, blends thereof, or mixtures thereof. In order to more effectively achieve the effects of the present invention, such fibers preferably include at least one selected from polyolefin fibers (polyolefin fibers), polyester fibers (polyester fibers), and composite fibers of two or more resins selected from polyolefins and polyesters.

[0044] Examples of polyolefin fibers include polypropylene fibers, polyethylene fibers, α-olefin copolymer fibers, etc. As the polyolefin fibers, polypropylene fibers and polyethylene fibers are preferred, and polypropylene fibers are more preferred, in that they can more effectively exhibit the effects of the present invention.

[0045] Examples of polyester fibers include polyethylene terephthalate (PET) fibers, polylactic acid fibers, polyglycolic acid fibers, etc. As the polyester fibers, polyethylene terephthalate (PET) fibers are preferred because they can more effectively exhibit the effects of the present invention.

[0046] Examples of conjugated fibers of two or more resins selected from polyolefin and polyester include fibers having a core-sheath structure, fibers having a side-by-side structure, hollow fibers, etc. Here, "conjugated fibers of two or more resins selected from polyolefin and polyester" means conjugated fibers of two or more polyolefin resins, conjugated fibers of two or more polyester resins, and conjugated fibers of one or more polyolefin and one or more polyester resins.

[0047] Specific examples of conjugated fibers of two or more resins selected from polyolefins and polyesters include fibers having a core-sheath structure in which one of two types of polyolefins is in the core and the other is in the sheath, fibers having a core-sheath structure in which polyester is in the core and polyolefin is in the sheath, and fibers in which polyolefin and polyester form a side-by-side structure.

[0048] The fibers constituting the nonwoven fabric contained in the engagement layer may be crimped fibers, such as fibers having a side-by-side structure or an offset core-sheath structure containing two components with different freezing points, which, when changing phase from a molten state to a solid state, solidify and shrink first, resulting in fine coil-like crimps with a relatively small radius.

[0049] The fibers constituting the nonwoven fabric in the engagement layer may contain any appropriate other components as long as the effects of the present invention are not impaired. Examples of such other components include other polymers, tackifiers, plasticizers, antidegradants, pigments, dyes, antioxidants, antistatic agents, lubricants, foaming agents, heat stabilizers, light stabilizers, inorganic fillers, and organic fillers. These may be used alone or in combination of two or more. The content of other components in the fibers constituting the nonwoven fabric in the engagement layer is preferably 10% by weight or less, more preferably 7% by weight or less, even more preferably 5% by weight or less, particularly preferably 2% by weight or less, and most preferably 1% by weight or less.

[0050] In the female member of the hook-and-loop fastener of the present invention, the density of the nonwoven fabric in the engaging layer is preferably 5 kg / m 3 ~100kg / m 3 and more preferably 10 kg / m 3 ~100kg / m 3 and more preferably 10 kg / m 3 ~80kg / m 3 and more preferably 10 kg / m 3 ~70kg / m3 and particularly preferably 10 kg / m 3 ~60kg / m 3 and most preferably 20 kg / m 3 ~50kg / m 3 In the female hook-and-loop fastener of the present invention, when the density of the nonwoven fabric in the engaging layer falls within the above range, it is possible to achieve both high shear stress and high peel strength as the engaging force with the male hook-and-loop fastener, and in the case of disposable diapers and the like, the problem of slipping off when worn or after excretion can be effectively solved. In the female hook-and-loop fastener of the present invention, when the density of the nonwoven fabric in the engaging layer falls within the above range, it is possible to effectively solve the problem of slipping off when worn or after excretion. 3 If the density of the nonwoven fabric in the engaging layer is smaller than 100 kg / m, the male component of the hook-and-loop fastener may not be easily caught, or productivity may be poor, resulting in high costs. 3 If it is larger, the fibers of the nonwoven fabric of the female hook-and-loop fastener will be densely packed, making it difficult for the engaging portion of the male hook-and-loop fastener to be inserted into the female hook-and-loop fastener, and there is a risk that an excellent engaging force will not be exhibited. 3 ) is the basis weight of the nonwoven fabric (Xg / m 2 ) and the thickness (Y mm) of the nonwoven fabric measured based on the method described below. More specifically, the density (kg / m 3 ) is X / Y (kg / m 3 ) is calculated as

[0051] In the female hook-and-loop fastener component of the present invention, the diameter of the fibers of the nonwoven fabric in the engaging layer (hereinafter simply referred to as fiber diameter) is preferably 5 μm to 60 μm, more preferably 10 μm to 60 μm, even more preferably 10 μm to 50 μm, even more preferably 10 μm to 40 μm, particularly preferably 15 μm to 40 μm, and most preferably 20 μm to 40 μm, so as to more effectively exhibit the effects of the present invention. In the female hook-and-loop fastener component of the present invention, the diameter of the fibers of the nonwoven fabric in the engaging layer falls within the above range, thereby achieving both high shear stress and high peel strength as the engaging force with the male hook-and-loop fastener component, and effectively resolving the problem of slippage in disposable diapers, etc., during putting on or after excretion. In the female hook-and-loop fastener component of the present invention, if the diameter of the fibers of the nonwoven fabric in the engaging layer is smaller than 5 μm, there is a risk that the engaging force with the male hook-and-loop fastener component, particularly the shear stress, will decrease. If the diameter of the fibers of the nonwoven fabric in the engaging layer is larger than 60 μm, it may be difficult to engage with the male component of the hook-and-loop fastener, or the production speed may decrease, resulting in higher costs. In the present invention, the diameter of the fibers of the nonwoven fabric in the engaging layer (fiber diameter) is measured by the method described below.

[0052] In the female member of the hook-and-loop fastener of the present invention, the basis weight of the nonwoven fabric in the engaging layer is preferably 10 g / m 2 ~60g / m 2 and more preferably 12 g / m 2 ~50g / m 2 and more preferably 15 g / m 2 ~40g / m 2 and particularly preferably 15 g / m 2 ~30g / m 2 and most preferably 15 g / m 2 ~25g / m 2 In the female hook-and-loop fastener component of the present invention, by having the basis weight of the nonwoven fabric in the engaging layer fall within the above range, it is possible to provide a female hook-and-loop fastener component having an engaging layer that employs a nonwoven fabric, which more effectively suppresses fuzzing of the engaging layer after the male hook-and-loop fastener component is engaged and then peeled away.

[0053] Any appropriate material can be used as the material for the physical property layer as long as it does not impair the effects of the present invention. In terms of being able to more effectively exhibit the effects of the present invention, the material for the physical property layer is preferably a fibrous nonwoven fabric or film, and in terms of being able to more effectively exhibit the effects of the present invention, a fibrous nonwoven fabric is more preferred. In other words, in terms of being able to more effectively exhibit the effects of the present invention, the female component of the hook-and-loop fastener of the present invention is preferably made solely of a nonwoven fabric.

[0054] When the material of the physical property layer is a fibrous nonwoven fabric, the nonwoven fabric may be of only one type, or may be of two or more types.

[0055] When the material of the physical property layer is a fibrous nonwoven fabric, examples of the nonwoven fabric include spunbond nonwoven fabric, thermalbond nonwoven fabric, adhesive bonded nonwoven fabric, air-through nonwoven fabric, meltblown nonwoven fabric, spunlace nonwoven fabric, spunbond meltblown spunbond nonwoven fabric, spunbond meltblown meltblown spunbond nonwoven fabric, non-bonded nonwoven fabric, electrospun nonwoven fabric, flashspun nonwoven fabric (e.g., TYVEK™ by DuPont), and carded nonwoven fabric.

[0056] When the material of the physical layer is a fibrous nonwoven fabric, the nonwoven fabric may contain fibers of a uniform structure or bicomponent fibers such as core-sheath, side-by-side, sea-island, and other bicomponent structures. For a detailed description of nonwoven fabrics, see, for example, "Nonwoven Fabric Primer and Reference Sampler," E.A. Vaughn, Association of the Nonwoven Fabrics Industry, 3rd Edition (1992).

[0057] When the material of the physical property layer is a fibrous nonwoven fabric, any appropriate fiber can be used as the fiber as long as it does not impair the effects of the present invention. Such fibers include, for example, polyolefins (such as polypropylene and polyethylene), polyesters, polyamides, polyurethanes, elastomers, rayon, cellulose, acrylics, copolymers thereof, blends thereof, or mixtures thereof. In order to more effectively exhibit the effects of the present invention, such fibers preferably include at least one type selected from polyolefin fibers (polyolefin fibers), polyester fibers (polyester fibers), and composite fibers of two or more resins selected from polyolefins and polyesters.

[0058] Examples of polyolefin fibers include polypropylene fibers, polyethylene fibers, α-olefin copolymer fibers, etc. As the polyolefin fibers, polypropylene fibers and polyethylene fibers are preferred, and polypropylene fibers are more preferred, in that they can more effectively exhibit the effects of the present invention.

[0059] Examples of polyester fibers include polyethylene terephthalate (PET) fibers, polylactic acid fibers, polyglycolic acid fibers, etc. As the polyester fibers, polyethylene terephthalate (PET) fibers are preferred because they can more effectively exhibit the effects of the present invention.

[0060] Examples of conjugated fibers of two or more resins selected from polyolefin and polyester include fibers having a core-sheath structure, fibers having a side-by-side structure, hollow fibers, etc. Here, "conjugated fibers of two or more resins selected from polyolefin and polyester" means conjugated fibers of two or more polyolefin resins, conjugated fibers of two or more polyester resins, and conjugated fibers of one or more polyolefin and one or more polyester resins.

[0061] Specific examples of conjugated fibers of two or more resins selected from polyolefins and polyesters include fibers having a core-sheath structure in which one of two types of polyolefins is in the core and the other is in the sheath, fibers having a core-sheath structure in which polyester is in the core and polyolefin is in the sheath, and fibers in which polyolefin and polyester form a side-by-side structure.

[0062] When the material of the physical property layer is a fibrous nonwoven fabric, the fibers constituting the nonwoven fabric may be crimped fibers, such as fibers having a side-by-side structure or an offset core-sheath structure containing two components with different freezing points, which exhibit fine coil-like crimps with a relatively small radius as the component with the higher freezing point solidifies and shrinks first when the material changes phase from a molten state to a solid state.

[0063] When the material of the physical property layer is a fibrous nonwoven fabric, the fibers constituting the nonwoven fabric may contain any appropriate other components as long as the effects of the present invention are not impaired. Examples of such other components include other polymers, tackifiers, plasticizers, antidegradants, pigments, dyes, antioxidants, antistatic agents, lubricants, foaming agents, heat stabilizers, light stabilizers, inorganic fillers, and organic fillers. These may be used alone or in combination of two or more. The content of other components in the fibers constituting the nonwoven fabric in the engagement layer is preferably 10% by weight or less, more preferably 7% by weight or less, even more preferably 5% by weight or less, particularly preferably 2% by weight or less, and most preferably 1% by weight or less.

[0064] When the material of the physical property layer is a film, any appropriate material may be used as the material of the film as long as it does not impair the effects of the present invention. Such materials are preferably, for example, unstretched polypropylene film, stretched polypropylene film, polyethylene film, etc., each having a thickness of 10 μm to 60 μm, in order to more effectively exhibit the effects of the present invention.

[0065] When the physical layer is a fibrous nonwoven fabric, the basis weight of the nonwoven fabric in the physical layer is preferably 10 g / m 2 ~40g / m 2 and more preferably 10 g / m 2 ~30g / m 2 and more preferably 10 g / m 2 ~25g / m 2 and particularly preferably 10 g / m 2 ~20g / m 2 When the physical layer is a fibrous nonwoven fabric, by ensuring that the basis weight of the nonwoven fabric in the physical layer falls within the above range, shrinkage deformation in the width direction during web handling is unlikely to occur, cost competitiveness is excellent, printability is good, the see-through properties of the print are good, adhesive coating is easy, the coated adhesive is unlikely to bleed onto the engagement surface, and flexibility is good.

[0066] When the physical layer is a fibrous nonwoven fabric, the fiber diameter is preferably 40 μm or less, more preferably 1 μm to 40 μm, even more preferably 1 μm to 30 μm, particularly preferably 1 μm to 25 μm, and most preferably 1 μm to 20 μm. When the physical layer is a fibrous nonwoven fabric, having the fiber diameter within the above range reduces shrinkage deformation in the width direction during web handling, provides excellent cost competitiveness, good printability, good see-through printability, easy adhesive coating, reduces bleed-through of the coated adhesive onto the engaging surface, and provides good flexibility. When the physical layer is a fibrous nonwoven fabric, if the fiber diameter is greater than 40 μm, shrinkage deformation in the width direction during web handling is likely to occur, resulting in poor cost competitiveness, poor printability, difficult adhesive coating, and the risk of the coated adhesive bleed-through onto the engaging surface.

[0067] When the physical layer is a fibrous nonwoven fabric, the density of the nonwoven fabric is preferably 5 kg / m in order to more effectively exhibit the effects of the present invention in the female part of the hook-and-loop fastener of the present invention. 3 ~200kg / m 3 and more preferably 20 kg / m 3 ~150kg / m 3and more preferably 50 kg / m 3 ~150kg / m 3 and more preferably 50 kg / m 3 ~120kg / m 3 and particularly preferably 60 kg / m 3 ~120kg / m 3 and most preferably 70 kg / m 3 ~120kg / m 3 In the present invention, the density (kg / m 3 ) is the basis weight of the nonwoven fabric (Xg / m 2 ) and the thickness (Y mm) of the nonwoven fabric measured by the method described below. More specifically, the density (kg / m 3 ) is X / Y (kg / m 3 ) is calculated as

[0068] When the physical layer is a nonwoven fabric of fibers, it may be a laminate of nonwoven fabrics of different fibers (for example, a laminate of spunbond nonwoven fabric / meltblown nonwoven fabric / spunbond nonwoven fabric).

[0069] In addition, when the fiber diameter varies greatly in the thickness direction (for example, SMS, SSMMS, etc.), the diameters of the same number of fibers (N = 5 or more) were measured and the average value was used as the fiber diameter. However, this did not include parts with locally thin thickness due to heat welding, such as spunbond and spunmelt.

[0070] When the physical layer is a film, its thickness is preferably 60 μm or less, more preferably 10 μm to 50 μm, even more preferably 10 μm to 40 μm, particularly preferably 10 μm to 30 μm, and most preferably 15 μm to 25 μm. When the physical layer is a film, having a thickness within the above range makes it less likely to shrink and deform in the width direction during web handling, provides excellent cost competitiveness, good see-through printing, facilitates adhesive coating, and has good flexibility. When the physical layer is a film, a thickness greater than 60 μm may result in poor cost competitiveness, poor see-through printing, and poor flexibility.

[0071] In the female part of the hook-and-loop fastener of the present invention, the total basis weight, which is the sum of the basis weight of the nonwoven fabric in the engaging layer and the basis weight of the nonwoven fabric in the physical layer, is preferably 60 g / m 2 or less, more preferably 10 g / m 2 ~57g / m 2 and more preferably 15 g / m 2 ~53g / m 2 and particularly preferably 20 g / m 2 ~50g / m 2 and most preferably 30 g / m 2 ~47g / m 2 In the female component of the hook-and-loop fastener of the present invention, when the total basis weight, which is the sum of the basis weight of the nonwoven fabric in the engagement layer and the basis weight of the nonwoven fabric in the physical property layer, falls within the above range, shrinkage deformation in the width direction during web handling is less likely to occur, cost competitiveness is superior, printability is better, the see-through properties of the print are better, adhesive coating is easier, the coated adhesive is less likely to bleed through the engagement surface, and flexibility is better.

[0072] In the female component of the hook-and-loop fastener of the present invention, the surface of the fibers constituting the nonwoven fabric contained in the engagement layer and the surface of the physical layer facing the engagement layer preferably contain the same type of polymer. By having the surface of the fibers constituting the nonwoven fabric contained in the engagement layer and the surface of the physical layer facing the engagement layer contain the same type of polymer, it is possible to provide a female component of the hook-and-loop fastener that more effectively suppresses fuzzing of the engagement layer after the male component of the hook-and-loop fastener is engaged and then peeled off. Here, "the surface of the fibers constituting the nonwoven fabric contained in the engagement layer" may refer to the surface of the fibers, such as the sheath portion of fibers having a core-sheath structure.

[0073] When the surface of the fibers constituting the nonwoven fabric contained in the engagement layer and the surface of the physical layer facing the engagement layer contain the same type of polymer, any appropriate polymer can be used as long as the effects of the present invention are not impaired. Such a polymer is preferably a polyolefin. By having the surface of the fibers constituting the nonwoven fabric contained in the engagement layer and the surface of the physical layer facing the engagement layer contain the same type of polyolefin, it is possible to provide a female hook-and-loop fastener that more effectively suppresses fuzzing of the engagement layer after engaging and then peeling off the male hook-and-loop fastener.

[0074] The female component of the hook-and-loop fastener of the present invention has an embossed pattern. Such an embossed pattern is preferably formed by embossing. Specific examples of the embossed pattern include a continuous grid, a discontinuous grid, a continuous curve, a discontinuous curve, a continuous zigzag, a discontinuous zigzag, a continuous line, a discontinuous line, a circle, an ellipse, a hollow circle, a hollow ellipse, an arc, and a hollow arc.

[0075] The embossed pattern of the female component of the hook-and-loop fastener of the present invention is preferably a discontinuous embossed pattern, more preferably an arc-shaped, diamond-shaped, or lattice-shaped embossed pattern, and even more preferably an arc-shaped embossed pattern, in order to more effectively exhibit the effects of the present invention. A schematic plan view of a female component of the hook-and-loop fastener of the present invention having an arc-shaped embossed pattern is shown in Figure 1. A schematic plan view of a female component of the hook-and-loop fastener of the present invention having a diamond-shaped embossed pattern is shown in Figure 2. A schematic plan view of a female component of the hook-and-loop fastener of the present invention having a lattice-shaped embossed pattern is shown in Figure 3.

[0076] In Fig. 1, the female component 100 of the hook-and-loop fastener of the present invention has a plurality of embossments 10 that form an arc-shaped embossed pattern. In Fig. 1, the female component of the hook-and-loop fastener of the present invention has an area 20 without an embossed pattern.

[0077] In Fig. 2, the female component 100 of the hook-and-loop fastener of the present invention has embossments 10 that form a diamond-shaped embossed pattern. In Fig. 2, the female component of the hook-and-loop fastener of the present invention has an area 20 without an embossed pattern.

[0078] In Fig. 3, the female component 100 of the hook-and-loop fastener of the present invention has embossments 10 that form a grid-like embossed pattern. In Fig. 3, the female component of the hook-and-loop fastener of the present invention has an area 20 without an embossed pattern.

[0079] In the female hook-and-loop fastener component of the present invention, for example, a spunbond nonwoven fabric or an air-through nonwoven fabric is used as the nonwoven fabric fiber contained in the engagement layer, thereby enabling the fibers constituting the nonwoven fabric to have bonded points. As a result, when the female hook-and-loop fastener component of the present invention has an embossed pattern, not only are the fibers constituting the nonwoven fabric contained in the engagement layer firmly bonded to each other in the embossed pattern area (e.g., the area of ​​multiple embossments 10 in Figure 1 ) due to the embossing process, but also in areas without an embossed pattern (e.g., area 20 without an embossed pattern in Figure 1 ), the fibers constituting the nonwoven fabric contained in the engagement layer have bonded points. By achieving this structure, the female hook-and-loop fastener component of the present invention has an engagement layer employing a nonwoven fabric, and can effectively suppress pilling of the engagement layer after engagement and subsequent separation of the male hook-and-loop fastener component. In contrast, if a spunlace nonwoven fabric is used as the nonwoven fabric fiber contained in the engagement layer, the fibers constituting the nonwoven fabric contained in the engagement layer are less likely to have bonded points. For this reason, when the female component of the hook-and-loop fastener of the present invention has an embossed pattern, the fibers constituting the nonwoven fabric contained in the engagement layer in the embossed pattern area (for example, the area of ​​multiple embossments 10 in Figure 1) have strong bond points due to the embossing process, but in areas without the embossed pattern (for example, area 20 without the embossed pattern in Figure 1), the fibers constituting the nonwoven fabric contained in the engagement layer are unlikely to have bond points. For this reason, there is a risk that the effects of the present invention will not be achieved.

[0080] In the female component of the hook-and-loop fastener of the present invention, the embossing width of the embossings constituting the embossing pattern is preferably 0.1 mm to 3.0 mm, more preferably 0.3 mm to 2.0 mm, even more preferably 0.3 mm to 1.5 mm, particularly preferably 0.5 mm to 1.5 mm, and most preferably 0.5 mm to 1.2 mm. By ensuring that the embossing width falls within the above range, it is possible to provide a female hook-and-loop fastener having an engaging layer that employs a nonwoven fabric, which more effectively suppresses fuzzing of the engaging layer after engaging and then peeling off the male hook-and-loop fastener. The embossing width in the female component of the hook-and-loop fastener of the present invention refers to the width W of the embossing 10 in the MD direction, as shown in, for example, Figures 1 to 3.

[0081] In the female component of the hook-and-loop fastener of the present invention, the distance between two adjacent embossments in the embossments that make up the embossed pattern is preferably 10 mm or less, more preferably 1 mm to 10 mm, even more preferably 1.5 mm to 9 mm, particularly preferably 2 mm to 8 mm, and most preferably 2.5 mm to 7 mm, on any line in the MD. By having the distance between two adjacent embossments in the embossments that make up the embossed pattern fall within the above range on any line in the MD, it is possible to provide a female component of a hook-and-loop fastener that has an engaging layer that uses a nonwoven fabric, and that more effectively suppresses fuzzing of the engaging layer after engaging and then peeling the male component of the hook-and-loop fastener.

[0082] In the female component of the hook-and-loop fastener of the present invention, the distance on a line in the MD between two adjacent embossments in the embossments constituting the embossed pattern refers, for example, to the distance L between two adjacent embossments on the MD line P (which may be a line in the MD at any position in the CD) in the case of an arc-shaped embossed pattern as shown in Fig. 1, and refers, for example, to the distance L between two adjacent embossments (intersections of the embossments) on the MD line P (a line in the MD at a position in the CD that passes through the intersection of the embossments) in the case of a diamond-shaped embossed pattern as shown in Fig. 2 or a lattice-shaped embossed pattern as shown in Fig. 3. In other words, the distance L is the maximum value of the distance between two adjacent embossments on a line in the MD (which may be a line in the MD at any position in the CD) in the embossed pattern (sometimes referred to as the maximum inter-embossment distance).

[0083] In the female component of the hook-and-loop fastener of the present invention, the ratio L / W of the distance L between two adjacent embossments in the embossings that make up the embossed pattern to the embossing width W of the embossings that make up the embossed pattern is preferably 0.3 to 100, more preferably 1 to 50, and even more preferably 2 to 10. When the ratio L / W of the distance L between two adjacent embossments in the embossings that make up the embossed pattern to the embossing width W of the embossings that make up the embossed pattern falls within the above range, the female component of the hook-and-loop fastener has an engaging layer that uses a nonwoven fabric, and can more effectively suppress fuzzing of the engaging layer after the male component of the hook-and-loop fastener is engaged and then peeled away.

[0084] The embossing depth is preferably 0.1 mm to 2.0 mm, more preferably 0.2 mm to 1.8 mm, even more preferably 0.3 mm to 1.5 mm, particularly preferably 0.5 mm to 1.5 mm, and most preferably 0.7 mm to 1.2 mm. By keeping the embossing depth within the above range, it is possible to provide a female hook-and-loop fastener component having an engaging layer that uses a nonwoven fabric, which more effectively suppresses fuzzing of the engaging layer after engaging and then peeling off the male hook-and-loop fastener component.

[0085] In the female component of the hook-and-loop fastener of the present invention, the ratio of the area of ​​the welded portion by the embossed pattern to the total surface area of ​​the female component of the hook-and-loop fastener (hereinafter sometimes referred to as the "embossed weld area ratio") is preferably 35% or less, more preferably 5% to 33%, even more preferably 10% to 30%, particularly preferably 12% to 28%, and most preferably 12% to 23%. When the embossed weld area ratio falls within the above range, in a female component of the hook-and-loop fastener having an engaging layer that uses a nonwoven fabric, fluffing of the engaging layer after engaging and then peeling the male component of the hook-and-loop fastener can be more effectively suppressed.

[0086] In the female component of the hook-and-loop fastener of the present invention, the thickness of the welded portion formed by the embossed pattern is preferably 100 μm or less, more preferably 10 μm to 100 μm, even more preferably 15 μm to 80 μm, particularly preferably 20 μm to 70 μm, and most preferably 25 μm to 60 μm. When the thickness of the welded portion formed by the embossed pattern falls within the above range, the female component of the hook-and-loop fastener has an engaging layer that uses a nonwoven fabric, and fuzzing of the engaging layer after engaging and then peeling off the male component of the hook-and-loop fastener can be more effectively suppressed.

[0087] <Method for manufacturing the female member of the hook-and-loop fastener of the present invention> One preferred method for producing the female component of the hook-and-loop fastener of the present invention involves laminating raw nonwoven fabrics and embossing them with a pattern roll at any appropriate processing temperature (e.g., 160°C), any appropriate linear pressure (e.g., 160 N / mm), and any appropriate processing speed (e.g., 10 m / min) to obtain the desired female component of the hook-and-loop fastener.

[0088] <Uses of the female component of the hook-and-loop fastener of the present invention> The female hook-and-loop fastener component of the present invention can be combined with a male hook-and-loop fastener component that engages with the female hook-and-loop fastener component to form a hook-and-loop fastener. That is, the hook-and-loop fastener of the present invention comprises the female hook-and-loop fastener component of the present invention and a male hook-and-loop fastener component that engages with the female hook-and-loop fastener component. The female hook-and-loop fastener component of the present invention can also be used in any suitable article that can effectively utilize the effects of the present invention. Representative examples of such articles include sanitary products. That is, the sanitary product of the present invention comprises the female hook-and-loop fastener component of the present invention. Examples of such sanitary products include diapers (particularly disposable diapers), supports, masks, etc. [Example]

[0089] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. The test and evaluation methods used in the examples are as follows. Unless otherwise specified, parts mean parts by weight, and % means % by weight.

[0090] <Evaluation of fluffiness> The obtained female hook-and-loop fastener component was cut into a 5 cm x 5 cm piece and placed on a commercially available disposable diaper. Meanwhile, a 25 mm x 13 mm male component (a commercially available mechanical hook component for hook-and-loop fasteners) with a 60 μm thick polyethylene film guide was prepared and placed on the female component so that the 25 mm edge was parallel to the flow direction of the engaging layer, and pressed with fingers. The guide was then peeled off by hand, and the fluffing was visually inspected. This procedure was repeated five times on the same location of the hook-and-loop fastener. The evaluation was carried out according to the following criteria. ○○○: Almost no fuzzing after 5 repeated peelings. ○○: Little pilling after 5 repeated peelings. ◯: There was a lot of fluffing after five repeated peelings, but there was little fluffing after three repeated peelings. △: There was a lot of fluffing after three repeated peelings, but there was little fluffing after one peeling. ×: Much fuzzing after one peeling.

[0091] <Fiber diameter measurement> Using a Keyence digital microscope "VHX-1000," the surface of the nonwoven fabric was photographed at a magnification of 500x, and the fiber diameter was measured for N=5 or more using the image analysis software of the same microscope, and the average value was taken as the fiber diameter.

[0092] <Nonwoven fabric thickness> Using a Keyence digital microscope "VHX-1000," the cross section of the nonwoven fabric was photographed at 100x magnification, and the thickness of the nonwoven fabric was measured using the machine's image analysis software. In measuring the thickness, parallel lines that intersect with the fibers at 10 points at the top and bottom of the nonwoven fabric cross section were defined as the upper and lower edges, respectively, and the length between the upper and lower edges was defined as the thickness of the nonwoven fabric.

[0093] [Examples 1-18, Comparative Example 1] The raw nonwoven fabrics shown in Tables 1 and 2 were laminated together and embossed with an embossing pattern roll at a processing temperature of 200°C, a linear pressure of 160 N / mm, and a processing speed of 20 m / min to obtain a female component of a hook-and-loop fastener. The embossing pattern used was an arc-shaped embossing pattern as shown in Figure 1, and the embossing width and the maximum linear distance in the MD direction between two adjacent embossings (maximum inter-embossing distance L) were as shown in Tables 1 and 2.

[0094] [Examples 19-22, Comparative Example 2] The raw nonwoven fabrics shown in Table 3 were layered together and embossed with an embossing pattern roll at a processing temperature of 200°C, a linear pressure of 160 N / mm, and a processing speed of 20 m / min to obtain a female component of a hook-and-loop fastener. The embossing patterns used were a diamond-shaped embossing pattern shown in Figure 2 and a lattice-shaped embossing pattern shown in Figure 3, and the embossing width and the maximum linear distance between adjacent embossments in the MD direction (maximum inter-embossing distance L) were as shown in Table 3.

[0095] [Table 1]

[0096] [Table 2]

[0097] [Table 3] [Industrial Applicability]

[0098] The female hook-and-loop fastener component of the present invention can be used in any suitable article that can effectively utilize the effects of the present invention. Typical examples of such articles include sanitary products. Examples of such sanitary products include diapers (particularly disposable diapers), supports, and masks. [Explanation of symbols]

[0099] 100 hook-and-loop fastener female member 10 Embossing 20 Area without embossed pattern

Claims

1. A hook-and-loop fastener female component having an engaging layer that can be engaged with a hook-and-loop fastener male component and a physical layer that holds the engaging layer, The engaging layer includes a nonwoven fabric of fibers, and the fibers constituting the nonwoven fabric have bonding points, The physical layer is a nonwoven fabric of fibers, and the density of the nonwoven fabric is 5 kg / m ３ ~200 kg / m ３ and the nonwoven fabric in the engagement layer is a thermal point bonded nonwoven fabric, The welded portion has an embossed pattern. Female part of hook-and-loop fastener.

2. The total basis weight, which is the sum of the basis weight of the nonwoven fabric in the engagement layer and the basis weight of the nonwoven fabric in the physical property layer, is 30 g / m ２ The female component of the hook-and-loop fastener according to claim 1 .

3. The basis weight of the nonwoven fabric in the engagement layer is 10 g / m ２ ~60g / m ２ 3. The female component of the hook-and-loop fastener according to claim 1 or 2,

4. The basis weight of the nonwoven fabric in the physical property layer is 10 g / m ２ ~40g / m ２ The female component of the hook-and-loop fastener according to any one of claims 1 to 3,

5. The density of the nonwoven fabric in the engagement layer is 5 kg / m ３ ~100 kg / m ３ The female component of the hook-and-loop fastener according to any one of claims 1 to 4,

6. 6. The female component of a hook-and-loop fastener according to claim 1, wherein the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern is 10 mm or less on any line in the MD direction.

7. 7. The female component of a hook-and-loop fastener according to claim 1, wherein the distance L between two adjacent embossments among the plurality of embossments constituting the embossed pattern is 1 mm or more on any line in the MD direction.

8. 8. The female component of the hook-and-loop fastener according to claim 1, wherein the embossing width W in the MD direction of the plurality of embossments that make up the embossing pattern is 0.1 mm or more.

9. 9. The female component of the hook-and-loop fastener according to claim 1, wherein the embossing width W in the MD direction of the plurality of embossments that make up the embossing pattern is 3.0 mm or less.

10. 10. The female component of a hook-and-loop fastener according to claim 1, wherein the ratio L / W of the distance L between two adjacent embossments on a line in the MD direction among the plurality of embossments constituting the embossed pattern and the embossing width W of the plurality of embossments constituting the embossed pattern is 0.3 to 100.

11. 11. The hook-and-loop fastener female member according to claim 1, wherein the ratio of the area of ​​the welded portion formed by the embossed pattern to the area of ​​the entire surface of the hook-and-loop fastener female member is 35% or less.

12. 12. The hook-and-loop fastener female member according to claim 1, wherein the ratio of the area of ​​the welded portion formed by the embossed pattern to the area of ​​the entire surface of the hook-and-loop fastener female member is 5% or more.

13. The female component of the hook-and-loop fastener according to claim 1 , wherein the surface of the fibers of the nonwoven fabric in the engagement layer and the surface of the physical layer facing the engagement layer contain the same type of polymer.

14. 14. The female component of the hook-and-loop fastener according to claim 13, wherein the polymer is a polyolefin.

15. 15. The female component of the hook-and-loop fastener according to claim 1, wherein the thermal point-bonded nonwoven fabric is a spunbonded nonwoven fabric.

16. A hook-and-loop fastener comprising the female hook-and-loop fastener component according to any one of claims 1 to 15 and a male hook-and-loop fastener component that engages with the female hook-and-loop fastener component.

17. A sanitary product comprising the female hook-and-loop fastener member according to any one of claims 1 to 15.

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