Bonded article

Abstract

In order to provide a bonded article that has excellent bonding strength, can combine adherends of different configurations, and also has excellent productivity, this bonded article comprises at least a first adherend, a second adherend, and a bonding member interposed between the first adherend and the second adherend, the bonded article being characterized in that: the bonding member includes at least a first bonding resin layer, a second bonding resin layer, and a base material layer interposed between the first bonding resin layer and the second bonding resin layer; the first bonding resin layer contacts the first adherend; the second bonding resin layer contacts the second adherend; the peeling strength of the first adherend measured on the basis of JIS L 1086(2020)7.10 is lower than the peeling strength of the second adherend; and the surface area of the second bonding resin layer is less than the surface area of the first bonding resin layer.

Description

Adhesive processed products

[0001] The present invention relates to an adhesive processed product.

[0002] A variety of bonded products in which fibrous adherends are bonded without machine sewing have been commercially available. These bonding methods include bonding the overlapping adherends with an adhesive interposed between them, and welding the overlapping adherends by melting and solidifying them.

[0003] As an example of an adhesive processed product in the patent literature, a textile product is known in which a thermal adhesive tape using a resin such as a urethane, acrylic, or silicone resin as an adhesive is inserted between two overlapping adherends, and the adherends are bonded together by heating and pressing the adhesive in the thermal adhesive tape to melt and solidify (Patent Documents 1 and 2). However, previous adhesive bonding methods have been prone to peeling, or peeling, at the bonded portion when pulled or subjected to repeated washing, making it difficult to ensure strength equivalent to that achieved by machine sewing.

[0004] To improve this, a technology has been disclosed (Patent Document 3) in which an attachment cloth having dot-shaped adhesive areas made of adhesive resin on one side is used, and the sides of the attachment cloth not having the adhesive areas are arranged facing each other and joined in the longitudinal direction, thereby allowing the attachment cloth to conform to the outer material and dispersing tensile stress in the adhesive areas.

[0005] JP 2002-338908 A JP 2009-67977 A JP 2009-279192 A

[0006] However, in the case of Patent Document 3, the mounting cloth having dot-shaped adhesive resin portions on one side and the side without adhesive portions are arranged facing each other and joined together with the longitudinal direction aligned, the manufacturing process requires a step of preparing the mounting cloth after coating for the number of bonding surfaces, a step of joining the mounting cloths after coating together, and a step of joining them to the adherend, which is poor in productivity and has the problem that the thickness caused by stacking the opposing mounting cloths at the adhesive portions is likely to lead to hardening of the texture.

[0007] As described above, none of the conventional adhesive processed products have been able to fully satisfy the performance requirements in terms of adhesive strength at the adhesive joint, productivity, and feel.

[0008] Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a bonded processed product which has excellent adhesive strength, can be combined with adherends of different structures, and is also highly productive.

[0009] In order to solve the above problems, the bonded product of the present invention has the following configuration.

[0010] (1) An adhesive processed product comprising at least a first adherend, a second adherend, and an adhesive member interposed between the first and second adherends, wherein the adhesive member comprises at least a first adhesive resin layer, a second adhesive resin layer, and a base layer interposed between the first adhesive resin layer and the second adhesive resin layer, wherein the first adhesive resin layer is in contact with the first adherend and the second adhesive resin layer is in contact with the second adherend, wherein the peel strength of the first adherend measured according to JIS L1086 (2020) 7.10 is lower than the peel strength of the second adherend, and the surface area of ​​the second adhesive resin layer is smaller than the surface area of ​​the first adhesive resin layer. (2) The adhesive processed product according to (1), wherein the ratio of the surface area of ​​the second adhesive resin layer to the surface area of ​​the first adhesive resin layer is 10% or more and 70% or less. (3) The adhesive processed product according to (1) or (2), wherein the ratio of the peel strength of the first adherend to the peel strength of the second adherend measured according to JIS L1086 (2020) 7.10 is 5% or more and 90% or less. (4) The adhesive processed product according to any one of (1) to (3), wherein the first adherend and the second adherend are selected from at least a fiber woven or knitted fabric, a nonwoven fabric, and a film. (5) The adhesive processed product according to any one of (1) to (4), wherein the ratio of the dimension of the base material layer in the short side direction of the adhesive member to the dimension of the first adhesive resin layer is 100% or more and 150% or less.

[0011] According to the present invention, a bonded product having excellent adhesive strength and excellent productivity can be obtained.

[0012] FIG. 1 is a schematic diagram of a cross section of an adhesive product of the present invention. FIG. 2 is a perspective view of an adhesive member as seen from a first adhesive resin layer. FIG. 3 is a perspective view of an adhesive member as seen from a second adhesive resin layer. FIG. 4 is a cross section of one embodiment of an adhesive product. FIG. 5 is a front view of one embodiment of an adhesive product. FIG. 6 is a conceptual diagram showing an embodiment in which the first adhesive resin layer 4a and / or the second adhesive resin layer 4b are formed in a dotted shape. FIG. 7 is a cross section of an adhesive member at the moment when the first adherend and the second adherend are peeled apart at the adhesive portion. FIG. 8 is a cross section of an adhesive member while the first adherend and the second adherend are being peeled apart at the adhesive portion.

[0013] The bonded processed product of the present invention will be described in detail below with reference to the drawings.

[0014] <Configuration of Bonded Product> A cross-sectional view of the bonded product of the present invention is shown in Fig. 1. A perspective view of the adhesive member as seen from the first adhesive resin layer is shown in Fig. 2, and a perspective view of the adhesive member as seen from the second adhesive resin layer is shown in Fig. 3. A cross-sectional view of one embodiment of the bonded product is shown in Fig. 4.

[0015] The bonded product 1 is composed of an adherend 2 and an adhesive member 4 .

[0016] The adherend 2 includes at least two adherends, a first adherend 2a and a second adherend 2b.

[0017] The adhesive member 4 is composed of a base material layer and an adhesive resin layer, and is formed by disposing a first adhesive resin layer 4a on one surface of the base material layer 4c and disposing a second adhesive resin layer 4b on the other surface.

[0018] The first adhesive resin layer 4a of the adhesive member 4 contacts the first adherend 2a at the adhesive surface 6, and the second adhesive resin layer 4b of the adhesive member 4 contacts the second adherend 2b at the adhesive surface 6.

[0019] <Adhesion Mechanism> The mechanism by which the adhesive processed product of the present invention has excellent adhesive strength is not clear, but is presumed to be as follows.

[0020] The factors that make up the adhesive strength of the bonded product 1 can be divided into two factors: the adhesive strength of the material of the adherend 2 itself, i.e., the peel strength of the first adherend 2a and the peel strength of the second adherend 2b, and the adhesive strength between the adhesive member 4 and the first adherend 2a and the second adherend 2b, i.e., the peel strength of the bonded product 1 itself.

[0021] When the first adherend 2a and the second adherend 2b are made of different materials or have different shapes, the adhesive strengths at the interfaces between the respective adherends 2 and the opposing adhesive members 4 will be different. The adhesive strength of the bonded product 1 depends on the lowest adhesive strength at the interfaces described above.

[0022] For example, if the peel strength of the first adherend 2a is lower than the peel strength of the second adherend 2b and the resin layer of the adhesive member 4 is single, i.e., monolayer, when a tensile force or peel force is applied to the bonded product 1, the adhesive strength at the interface between the first adherend 2a and the first adhesive resin layer 4a will be lower than the adhesive strength at the interface between the second adherend 2b and the second adhesive resin layer 4b. Due to this relationship in adhesive strength, peeling will occur first at the interface between the first adherend 2a and the first adhesive resin layer 4a.

[0023] 1, when a peeling force is applied to the adhesive portion 3, the order in which the force is applied inside the adhesive member 4 varies depending on the relative sizes of the surface area 5a of the first adhesive resin layer and the surface area 5b of the second adhesive resin layer that constitute the adhesive member 4. For example, when a peeling force is applied in the short side direction 4d of the adhesive member, the force is first applied to the adhesive resin side with the smaller surface area in the short side direction 4d of the adhesive member and to the outer edge side facing the peeling direction, and then a similar force is applied to the adhesive resin layer on the opposite side across the base material layer 4c.

[0024] The peel behavior of an adhesive member 4 having a first adhesive resin layer, a second adhesive resin layer, and a substrate layer interposed between the first and second adhesive resin layers will be discussed below using the adhesive product 1 shown in Figure 4 as an example. When a peel force is applied from the left side of Figure 4 to peel the first adherend 2a and the second adherend 2b, the peel force is applied to the left in the short side direction 4d of the adhesive member. This point will be further explained using Figures 7 and 8. Figure 7 is a cross-sectional view of the adhesive member at the moment when the first and second adherends are peeled from the adhesive joint, and Figure 8 is a cross-sectional view of the adhesive member while the first and second adherends are being peeled from the adhesive joint.

[0025] When the first adherend 2a and the second adherend 2b are peeled away from each other, the surface area 5a of the first adhesive resin layer is larger than the surface area 5b of the second adhesive resin layer, so that the first adhesive resin layer 4a and the base material layer 4c follow the first adherend 2a, as shown in Figure 7, and the peeling force is applied between the left end of the second adhesive resin layer 4b and the second adherend 2b.

[0026] In this state, near the left end of the first adhesive resin layer 4a, a force is applied to cause the first adhesive resin layer 4a and the first adherend 2a to peel away from each other in the same direction, resulting in a so-called shear peeling state, and the resistance to peeling increases due to the shear resistance applied.

[0027] When a peeling force is further applied to the first adherend 2a and the second adherend 2b, peeling occurs between the left end of the second adhesive resin layer 4b and the second adherend 2b in the adhesive member 4, as shown in Figure 8.

[0028] That is, near the left end of the first adhesive resin layer 4 a, a force is applied so that the first adhesive resin layer 4 a and the first adherend 2 a are peeled away in the same direction, i.e., a so-called shear peel state is achieved. On the other hand, on the second adherend 2 b side, a peel force is applied near the left end of the second adhesive resin layer 4 b, and a peel force is applied so that the left side of the second adherend 2 b is separated from the adhesive member 4.

[0029] In this way, the peel force applied to the bonded product varies depending on the size relationship between the surface area 5a of the first adhesive resin layer and the surface area 5b of the second adhesive resin layer that constitute the adhesive member 4. By adjusting this size relationship, it is possible to change the order in which the peel force is applied and distribute it.

[0030] Furthermore, when the same adherend and adhesive resin layer are used, the adhesive strength due to shear peeling, in which the peeling occurs in a shear direction, is higher than the adhesive strength when the peeling force is applied in a 90° direction.

[0031] Considering these factors that determine the adhesive strength of the bonded product of the present invention, if the shear peel strength of the first adherend is greater than the peel strength of the second adherend, the peel strength of the second adherend will affect the peel strength of the bonded product itself. Even if the shear peel strength of the first adherend is less than the peel strength of the second adherend, the shear peel strength of the first adherend will affect the peel strength of the bonded product itself. The former case is generally the case unless the difference in adhesive strength between the first and second adherends is extremely large. In either case, the peel strength will be greater than the peel strength of the first adherend, so the adhesive strength of the bonded product of the present invention itself will be higher than the adhesive strength of a bonded product in which the resin layer of the adhesive member 4 is a single layer.

[0032] In this way, in the present invention, by using the above-mentioned adhesive member 4, even if a first adherend with low adhesive strength is used, the adhesive strength between the first adherend and the first adhesive resin layer is increased, and the peel strength of the adhesive processed product 1 itself can be increased.

[0033] <Preferred embodiment of bonded product 1> In the present invention, the peel strength of the first adherend 2a is smaller than the peel strength of the second adherend 2b, and the surface area 5b of the second adhesive resin layer 4b in the adhesive member 4 is smaller than the surface area 5a of the first adhesive resin layer 4a. As a result, the load or peel force applied to the bonded product 1 is biased toward the second adhesive resin layer 4b, which has a higher peel strength, thereby distributing the load to the first adhesive resin layer 4a and improving peel durability, i.e., the bonded product 1 has excellent adhesive strength.

[0034] The peel strength of the adherend 2 referred to here is measured based on JIS L1086 (2020) 7.10.1. In measuring the peel strength of the first adherend 2a, the first adherend 2a is used as the adherend cloth, and in measuring the peel strength of the second adherend 2b, the second adherend 2b is used as the adherend cloth.

[0035] If the peel strengths of the first adherend 2a and the second adherend 2b are reversed, or if the relationship between the surface area 5a of the first adhesive resin layer and the surface area 5b of the second adhesive resin layer is reversed, the load or peel force applied to the bonded product 1 will be biased toward the first adhesive resin layer 4a, which has the lower peel strength, making peeling more likely to occur and resulting in poor adhesive strength for the bonded product 1.

[0036] The preferred range for the ratio of the peel strength of the first adherend 2a to the peel strength of the second adherend 2b (hereinafter referred to as the "peel strength ratio") is 5% or more and 90% or less. Peel strength ratio = peel strength of first adherend 2a (N / cm) ÷ peel strength of second adherend 2b (N / cm). A peel strength ratio of 5% or more ensures that the difference in peel strength between the first adhesive resin layer 4a and the second adhesive resin layer 4b falls within a preferred range, making it difficult for tensile load or peel force to remain in the first adhesive resin layer 4a, and thus improving the adhesive strength of the bonded product 1. Conversely, a peel strength ratio of 90% or less ensures that the difference in peel strength between the first adhesive resin layer 4a and the second adhesive resin layer 4b falls within a preferred range, allowing for sufficient dispersion and deflection of the tensile load and peel force of the first adhesive resin layer 4a, which has a lower peel strength, and thus improving the adhesive strength of the bonded product 1. A more preferred range is 10% or more and 60% or less.

[0037] Any method may be used to create a difference in peel strength, such as creating a difference in the bulkiness or surface roughness of the surfaces of the first adherend 2a and the second adherend 2b, i.e., a difference in anchor effect, creating a difference in elongation elasticity, or creating a difference in the melting point or viscosity of the raw materials.However, from the standpoint of versatility in specifications, it is preferable to create a difference in bulkiness and surface roughness.

[0038] In a more preferred embodiment of the adhesive product 1 of the present invention, the ratio of the surface area 5b of the second adhesive resin layer of the adhesive member 4 to the surface area 5a of the first adhesive resin layer (hereinafter referred to as the "surface area ratio"; the surface area here refers to the surface area on the adhesive surface 6 side of the adhesive resin layer, and corresponds to the area where each adhesive resin layer adheres to each adherend) is preferably in the range of 10% to 70%. Surface area ratio = [surface area 5b of the second adhesive resin layer (cm ２ ) ÷ surface area 5a (cm ) of the first adhesive resin layer ２ ) × 100 (%) Surface area 5a of first adhesive resin layer: the product of the short side dimension of the first adhesive resin layer 4a in the short side direction 4d of the adhesive member 4 and the long side dimension of the first adhesive resin layer 4a in the long side direction 4e of the adhesive member 4, as shown in Figures 2 and 3 Surface area of ​​second adhesive resin layer 4b: the product of the short side dimension of the second adhesive resin layer 4b in the short side direction 4d of the adhesive member 4 and the long side dimension of the second adhesive resin layer 4b in the long side direction 4e of the adhesive member 4, as shown in Figures 2 and 3 A surface area ratio of 10% or more brings the difference in surface area between the first adhesive resin layer 4a and the second adhesive resin layer 4b into a preferred range, making it easier to distribute the tensile load or peel force of the second adhesive resin layer 4b and providing a particularly excellent effect in improving the adhesive strength of the bonded product 1. Conversely, a surface area ratio of 70% or less brings the difference in surface area between the first adhesive resin layer 4a and the second adhesive resin layer 4b into a preferred range, making it possible to sufficiently distribute and deflect the tensile load or peel force of the first adhesive resin layer 4a, which has a lower peel strength, and providing a superior effect in improving the adhesive strength of the bonded product 1. A range of 30% or more and 60% or less is more preferable.

[0039] As a means for imparting the surface area ratio, any method may be used, such as providing a difference between the dimensions of the first adhesive resin layer 4a and the dimensions of the second adhesive resin layer 4b in the short side direction 4d of the adhesive member 4, as shown in Figure 2, or providing a difference between the dimensions of the first adhesive resin layer 4a and the dimensions of the second adhesive resin layer 4b in the long side direction 4e of the adhesive member 4. However, from the viewpoint of appearance quality, it is preferable to provide a difference between the dimensions of the first adhesive resin layer 4a and the dimensions of the second adhesive resin layer 4b in the short side direction of the adhesive member 4, so that the difference between the front and back of the adhesive processed product 1 is less visible.

[0040] Furthermore, in the adhesive processed product 1 of the present invention, the first adhesive resin layer 4a and / or the second adhesive resin layer 4b of the adhesive member 4 may have a dotted, intermittent, or zigzag shape, in which the resins are not continuous. The dotted shape may be circular, polygonal, or other shapes, but a circular shape is preferred from the viewpoint of versatility of the corresponding equipment and quality stability. The intermittent shape may be multiple straight lines or dotted lines. In particular, when at least one of the first adherend 2a and the second adherend 2b is stretchable, it is preferable that the adhesive resin be present intermittently in the stretching direction. For knitted fabrics or woven fabrics that stretch in both the warp and weft directions, a dotted shape is preferred because it provides excellent compliance with the stretching direction of the adherend.

[0041] As explained in the adhesive mechanism above, the area of ​​the dot-shaped or other areas where adhesive resin is present affects the adhesive strength. In this case, the surface area of ​​the first adhesive resin layer and the surface area of ​​the second adhesive resin layer are defined as the areas where adhesive resin is present. Specifically, the smallest polygon or circle circumscribing the dot-shaped or other areas where adhesive resin is present is assumed to be the polygon or circle with the most contact points with the adhesive resin, and its area is calculated. When the adhesive-processed product is a quilted product, such as a down jacket, with padding or feathers stuffed inside the lining, the adhesive area is often straight or curved when it is used to separate the padding insertion area. In such cases, a sample taken from the adhesive-processed product using the method described below is taken and the smallest rectangle or other quadrangle circumscribing the area where adhesive resin is present is assumed, and its area is calculated.

[0042] 6 shows an embodiment in which the first adhesive resin layer 4a and / or the second adhesive resin layer 4b are formed in a dotted shape, and the dimension of the adhesive resin layer in the short side direction 4d' in this embodiment is the distance between the outermost edges of the adhesive member in the short side direction 4d. The dimension of the adhesive resin layer in the long side direction 4e' is the distance between the outermost edges of the adhesive member in the long side direction 4e.

[0043] In this case, the ratio of the surface area 5b of the second adhesive resin layer to the surface area 5a of the first adhesive resin layer (hereinafter referred to as "surface area ratio") is preferably in the range of 10% to 70%.

[0044] In the present invention, the first adhesive resin layer 4a, the second adhesive resin layer 4b, and the base material layer 4c of the adhesive member 4 are preferably laminated with their centers aligned in the short side direction 4d', since this method is effective against peeling from either end of the short side direction. However, other methods are also acceptable. For example, if the peeling force is applied in one direction, the ends of the first adhesive resin layer 4a, the second adhesive resin layer 4b, and the base material layer 4c in the short side direction 4d or the long side direction 4e, respectively, that are opposite to the direction of peeling force application may be moved to one side of the short side direction 4d of the adhesive member, and only on the side where the peeling force is applied, the base material layer 4c and the first adhesive resin layer 4a protrude in the direction of peeling force application. The shape of the adhesive surface of the adhesive member is not limited to the shape with short and long sides as described above. The shape can be appropriately modified taking into account the design of the bonded product and the direction in which the peeling force is expected to be applied.

[0045] <Preferred form of adhesive resin> In the present invention, the type of resin that constitutes the adhesive resin layer is mainly an organic adhesive, and the types of organic adhesives are broadly classified into natural resin-based adhesives such as natural rubber casein, semi-synthetic adhesives such as cellulose acetate, and synthetic resin-based adhesives using polyurethane, acrylic, etc., but synthetic resin-based adhesives are preferred in terms of processability and cost.

[0046] Synthetic resin components are subdivided into resins using polyurethane, polyester, polyvinyl alcohol, vinyl chloride, acrylic resin, polyethylene, ethylene-vinyl acetate polymer, polyamides, polyolefins, etc., elastomers using silicone rubber, nitrile rubber, etc., and composites such as nylon-epoxy and vinyl-phenolic. Polyurethane, acrylic, nylon, ethylene-vinyl acetate, polycarbonate, and olefin are more preferred because they are highly processable and undergo a crosslinking reaction with moisture (humidity) in the air, resulting in excellent heat resistance, adhesive strength, and durability.

[0047] Synthetic resin-based reaction forms include dry-solidification types such as water-soluble, latex, and dispersion types; chemical reaction types in which a crosslinking reaction occurs when the base resin and curing agent are mixed to harden; heat-melting types (thermoplastic hot melts) that are solid at room temperature but melt when heated and harden when cooled; pressure-sensitive types that apply pressure to a highly viscous, fluid liquid to create an adhesive; and moisture-curing types (moisture-curing reactive hot melts) that harden by reacting with moisture in the air.

[0048] More preferably, the heat-melting type (thermoplastic hot melt) or moisture-curing type (moisture-curing reactive hot melt) is preferred, as it provides excellent adhesive strength at the interface between the adherend 2 and the adhesive resin layer.

[0049] In summary, the resin component that is preferably used in the adhesive processed product of the present invention is at least one component selected from polyurethane-based, acrylic-based, nylon-based, ethylene vinyl acetate-based, polycarbonate-based, and olefin-based resins, and the reaction form of the resin is at least one form selected from moisture-curing reactive hot melt or thermoplastic hot melt.

[0050] In the adhesive processed product 1 of the present invention, the first adhesive resin layer 4a and the second adhesive resin layer 4b of the adhesive member 4 may be made of different resin components, or one resin layer may be made of a thermoplastic hot melt and the other resin layer may be made of a moisture-curing reactive hot melt in terms of reaction form. For example, the resin component of the first adhesive resin layer 4a may be acrylic and the reaction form may be thermoplastic hot melt, and the resin component of the second adhesive resin layer 4b may be polyurethane and the reaction form may be a moisture-curing reactive resin.

[0051] The adhesive member 4 of the present invention comprises a substrate layer 4c and an adhesive resin layer, and is formed by disposing a first adhesive resin layer 4a on one surface of the substrate layer 4c and a second adhesive resin layer 4b on the other surface. In the adhesive member 4, the surface area 5b of the second adhesive resin layer is smaller than the surface area 5a of the first adhesive resin layer.

[0052] In the above-described configuration, when the adhesive member 4 and the adherend 2 are bonded using a heat press process or the like, if excessive heat, pressure, or time is applied, the molten first adhesive resin layer 4a may overflow from the base material layer 4c and adhere not only to the first adherend 2a side, which is the original adhesive surface 6, but also to the opposing second adherend 2b side, thereby impairing the adhesive strength.

[0053] In a preferred embodiment of the substrate layer 4c constituting the adhesive member 4 of the bonded product 1 of the present invention, the ratio of the substrate dimension in the short side direction of the adhesive member 4 to the dimension of the first adhesive resin layer 4a in the short side direction of the adhesive member 4 (referred to as the "dimensional ratio") is 100 to 150%, which is preferable from the viewpoint of preventing adhesion of the first adhesive resin layer 4a to the second adherend 2b and ensuring adhesive strength. Dimensional ratio = [substrate dimension in the short side direction of the adhesive member 4 ÷ dimension of the first adhesive resin layer 4a in the short side direction of the adhesive member 4] × 100 (%). If the dimensional ratio is less than 100%, the first adhesive resin layer 4a tends to adhere to the second adherend 2b, resulting in poor adhesive strength. Conversely, if the dimensional ratio exceeds 150%, the substrate may be easily visible in appearance, resulting in poor aesthetics. A more preferred range is 100 to 120%.

[0054] The difference in size can be achieved by any method, such as forming the substrate to a predetermined size and then applying a first adhesive resin layer 4a to the substrate in a size equal to or smaller than the size of the substrate, or by applying a first adhesive resin layer 4a to the entire surface of the substrate and then cutting it to the predetermined size. However, the method of forming the substrate to a predetermined size and then applying a first adhesive resin layer 4a to the substrate in a size equal to or smaller than the size of the substrate is preferred because it is easy to adjust the dimensional ratio. The second adhesive resin layer can also be provided in the same manner as the first adhesive resin layer.

[0055] As the material for the base layer 4c, it is preferable to use a fiber woven or knitted fabric, a nonwoven fabric, or a film alone or a laminate, as these have excellent flexibility. More preferably, a film or a high-density woven fabric has excellent appearance quality, as its thickness is less visible.

[0056] Although there is no limitation on the material, polyester-based polyurethane resin, polyether-based polyurethane resin, polycarbonate-based polyurethane resin, acrylic resin, polyester-based resin, etc. are preferably used.

[0057] In a more preferred embodiment, the components constituting the adhesive resin layer are easily melted and the components constituting the base material layer 4c are not easily melted under the heat processing temperature conditions, which is preferable in terms of excellent adhesion to the adherend and adhesive processing stability. １ is the melting point temperature T of the adhesive resin layer component ２ It is preferable that the melting point temperature T １ is the melting point temperature T of the adhesive resin layer component ２ If the melting point temperature T of the adhesive resin layer 4c is less than 100°C, the components of the base material layer 4c will melt before the components of the adhesive resin layer 4c melt during the bonding process, which will cause a problem in the bonding process. １ and the melting point temperature T of the adhesive resin layer components ２ The ratio (T １ / T ２ The melting point was measured using a DMAQ800 manufactured by TA Instruments in a temperature rise / control force mode at a temperature rise rate of 10°C / min, and the point at which the strain displacement changed significantly was taken as the melting point.

[0058] <Preferred Form of Adherend> As a preferred form of the adherend 2 in the present invention, it is preferable to use either a fiber woven or knitted fabric, a nonwoven fabric, or a film, as these are excellent in versatility for adhesive processing and flexibility. Fiber woven or knitted fabrics are more preferable because of their excellent strength. When using a woven fabric, generally, plain weave, twill weave, satin weave, and their modified weaves and multiaxial weaves are preferably used. When using a knitted fabric, plain knit, rib knit, purl knit, tricot, raschel, Milanese, etc. are preferably used. When using a nonwoven fabric, papermaking methods, chemical bonding methods, heat fusion methods, water jet punching methods, melt-blowing methods, flash spinning methods, etc. are preferably used.

[0059] Suitable fiber materials for the adherend 2 include synthetic fibers such as polyester, nylon, polyurethane, polypropylene, polyethylene, and acrylic, natural fibers such as cotton, and animal fibers such as wool.

[0060] Suitable synthetic fibers include polyamide homopolymers such as nylon 6.6, nylon 6, nylon 12, and nylon 4.6, copolymers of nylon 6 and nylon 6.6, polyamide fibers made of copolymerized polyamides obtained by copolymerizing nylon 6 with polyalkylene glycol, dicarboxylic acids, amines, or the like, polyester homopolymers such as polyethylene terephthalate and polybutylene terephthalate, and polyester fibers made of copolymerized polyesters copolymerized with an aliphatic dicarboxylic acid such as isophthalic acid, 5-sodium sulfoisophthalic acid, or adipic acid as an acid component, aramid fibers typified by copolymers of paraphenylene terephthalamide and aromatic ethers, rayon fibers, and polysulfone fibers.

[0061] Such fibers may contain various additives that are commonly used to improve productivity or properties during the manufacturing and processing of raw yarns, such as heat stabilizers, antioxidants, light stabilizers, smoothing agents, antistatic agents, plasticizers, thickeners, pigments, flame retardants, antibacterial agents, heat storage agents, water repellents, and water absorbents.

[0062] <More Preferred Form of Adherend> Depending on the use environment and purpose, a combination of different materials may be used as the adherend 2. For example, in applications and environments requiring waterproofing, such as rainwear or chemical protective clothing, when the first adherend 2a is used with the side to be waterproofed exposed, there is no problem with the first adherend 2a being a waterproofed nylon plain weave fabric and the second adherend 2b being a nylon circular knit fabric.

[0063] In a more preferred embodiment of the adherend 2 in the above aspect, the first adherend 2a has at least the adhesive surface 6 coated with a resin, and has a water resistance of 2000 mmH as measured in accordance with JIS L1092 (2020) 7.10 method. ２A viscosity of 0 (19.6 kPa) or more is preferable because it ensures waterproofing of the first adherend 2a and the bonded article 1 and also makes it easier to increase the adhesive strength.

[0064] Water resistance is 2000mmH ２ If the pressure is less than 10000 mmH (19.6 kPa), the waterproofing may be poor. ２ O (98.1kPa) or more, 30000mmH ２ 0 (294.2 kPa) or less.

[0065] The type of resin to be used to coat the adhesive surface 6 of the first adherend 2a is not limited, but preferably polyester-based polyurethane resin, polyether-based polyurethane resin, polycarbonate-based polyurethane resin, acrylic resin, polyester-based resin, etc. As a coating method for coating the adhesive surface 6 of the first adherend 2a with the resin, a coating method or a lamination method is preferably used.

[0066] The coating method may be any method for forming a film, such as dry-adhering or wet-coagulating a resin on the adhesive surface 6 of the adherend 2. To adjust the static friction coefficient or reduce weight, methods such as dry foaming by adding silica or a foaming agent, microporosity by wet-coagulating polyurethane, or roughening with an embossing roller may be used. The resin film may contain, as appropriate, titanium oxide, carbon black, pigments, antioxidants, ultraviolet absorbers, light stabilizers, flame retardants, and the like.

[0067] In the present invention, in order to enhance the waterproofness of the adhesive processed product 1, the adherend 2 on the waterproofing side is given waterproofness by a resin coating, and the adherends 2 are bonded together via an adhesive member 4, thereby making it possible to provide a waterproof adhesive processed product 1 that eliminates the penetration of the adherend that occurs with conventional machine sewing and the route for water to enter through the penetration.

[0068] <Method of Adhesion Processing> As a method for adhering the adherend 2 and the adhesive member 4 that constitute the adhesive processed product 1, a heat pressing method, a high-frequency heating method, or an ultrasonic processing method is preferably used, but any of these may be used, and the heat pressing method is more preferable because it is superior in terms of cost and productivity.

[0069] <Uses> The adhesive processed product 1 of the present invention may be used for any of, for example, outerwear and innerwear, i.e., clothing, hats, gloves, futons, sheets, curtains, tents, sleeping bags, umbrellas, bags, and the like.

[0070] In these garments, adhesive parts where adhesive members are present may be present in multiple locations. For example, in the down jacket shown in Figure 5, the down insertion part is separated by "adhesive parts 3." In this case, all or part of the adhesive parts 3 may be an embodiment of the present invention. More preferably, a range of 50% to 100% of the adhesive parts 3 in the garment is an embodiment of the present invention. By setting the range as described above, peeling and tearing when wearing the garment are reduced, which is preferable.

[0071] Furthermore, the adhesive processed product 1 of the present invention may be constructed by combining sewn sections made by a sewing machine. For example, in the garment shown in Figure 5, the peripheral areas excluding the quilting may be sewn by a sewing machine. It is also possible not to use sewn sections made by a sewing machine. In other words, the present invention can be used at least as a seam for joining adherends 2 together.

[0072] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited thereto. The adhesive processed products used in the examples and comparative examples were evaluated by the following methods.

[0073] [Measurement] [Peel strength of adherend 2] The peel strength of adherend 2 of bonded product 1 was measured in accordance with JIS L1086 (2020) 7.10.1. The adherend cloth in the peel strength measurement of first adherend 2a was the first adherend 2a, and the adherend cloth in the peel strength measurement of second adherend 2b was the second adherend 2b, and the peel strength of each was measured on the side bonded to the adhesive member. The adhesive used in this test was a urethane-based hot melt "αS23 (100 μm)" manufactured by Toray Coatex Co., Ltd., and the adhesive was applied in a heated platen press at a temperature of 140°C, a time of 10 seconds, and a pressure of 1 kg / cm. ２ Test pieces were prepared under the above conditions and the peel strength was measured. The unit was N / cm.

[0074] [Peel strength ratio between first adherend 2a and second adherend 2b] The peel strength ratio between the first adherend 2a and the second adherend 2b was calculated using the following formula: Peel strength ratio = [Peel strength of first adherend 2a ÷ Peel strength of second adherend 2b] × 100 (%) [Surface area ratio between second adhesive resin layer 4b and first adhesive resin layer 4a] The surface area ratio between the second adhesive resin layer 4b and the first adhesive resin layer 4a was calculated using the following formula.

[0075] Surface area ratio = [surface area 5b of second adhesive resin layer ÷ surface area 5a of first adhesive resin layer] × 100 (%). The surface area 5a of the first adhesive resin layer was calculated by measuring the dimension of the first adhesive resin layer 4a in the short side direction of the adhesive member 4 and the dimension of the first adhesive resin layer 4a in the long side direction of the adhesive member 4, and multiplying these values ​​by the respective values ​​in the short side direction, as shown in Figures 2 and 3. The unit is cm. ２ It was decided.

[0076] The surface area 5b of the second adhesive resin layer was calculated by measuring the dimension of the second adhesive resin layer 4b in the short side direction of the adhesive member 4 and the dimension of the second adhesive resin layer 4b in the long side direction of the adhesive member 4, and then using the product of these values. (Unit: cm) ２ It was decided.

[0077] In the following examples and comparative examples, the dimensions of the adhesive members in the long side direction were all 50 cm for the first adhesive resin layer, the second adhesive resin layer, and the base material layer, as described below. When measuring each dimension from an adhesive processed product, when taking a measurement sample from the adhesive member or adhesive processed product to be measured, a sample is cut out that includes the entire length in the short side direction and is a size that can be taken in the long side direction and is larger than the short side direction (if it is difficult to take that size, a size as close to that as possible). If the adhesive member has a gentle curve, the cut out portion should be as close to a straight line as possible.

[0078] [Dimensional ratio of substrate and first adhesive resin layer 4a in the short side direction of adhesive member 4] The ratio of the dimension of the substrate in the short side direction of adhesive member 4 to the dimension of the first adhesive resin layer 4a in the short side direction of adhesive member 4 was calculated by the following formula: Dimensional ratio = [Dimension of substrate in the short side direction of adhesive member 4 ÷ Dimension of first adhesive resin layer 4a in the short side direction of adhesive member 4] × 100 (%) [Peel strength of bonded product 1] The peel strength of the bonded product 1 was calculated based on JIS L1093 (2011) 7.1.1A-1 method by measuring the adhesive strength when the bonded product 1 was peeled off, and was calculated in N / cm to one decimal place.

[0079] [Evaluation] [Adhesion Stability] The adhesion of the bonded product was evaluated according to the criteria in Table 1. The higher the parameter score, the better the adhesion stability.

[0080] [Aesthetics] The aesthetics of the bonded product, i.e., the degree of visibility of contours and steps, specifically the degree of step and edge contour due to the thickness and hardness of the adhesive resin layer and base material layer 4c of the bonded product 1, and the presence or absence of seepage of the adhesive resin layer onto the surface of the adherend, i.e., the appearance quality, were visually judged and evaluated according to the criteria in Table 1. The higher the parameter score, the better the aesthetics.

[0081] [Overall evaluation] The total score of the evaluation items of adhesive stability and aesthetics was calculated and used as the overall evaluation. The higher the evaluation score, the better the overall result, and an evaluation result of 2 points or more was considered to be a good adhesive processed product. The evaluation criteria are shown in Table 2.

[0082]

[0083]

[0084] (Example 1) In the adhesive processed product shown in Figures 2 to 4, i.e., in the configuration of the adherend, as the first adherend, a nylon taffeta fabric, i.e., a plain weave fabric was woven using 16 dtex-5f nylon filament yarn for the warp fiber and 33 dtex-26f nylon filament yarn for the weft fiber, with a warp density of 207 threads / 2.54 cm and a weft density of 147 threads / 2.54 cm, followed by relaxation scouring and circular dyeing at 130°C, drying, and then calendering at 180° up / 60° down to obtain a nylon woven fabric.

[0085] As the second adherend, a nylon taffeta fabric, i.e., a warp fiber with a twist count of 500 times / m and a bulkiness of 6 cm ３ A nylon woven fabric was obtained using 17 dtex-7f nylon crimped filament textured yarn of 250 / 2.54 cm and 26 dtex-20f nylon crimped filament textured yarn as the weft fiber, with a warp density of 250 / 2.54 cm and a weft density of 164 / 2.54 cm.

[0086] Next, in the construction of the adhesive member, a polyurethane-based thermoplastic hot melt resin, that is, a resin mainly composed of a polyester-based polyurethane resin with hot melt adhesive properties and a softening point of 60°C and a melting point temperature of 115°C, was used, and the resin was extruded and stretched into a sheet on release paper by an extrusion method so as to have a film thickness of 100 μm, a stress of 3.4 MPa at an elongation of 50%, and a breaking strength of 26.7 MPa. The adhesive resin layer was then separated from the release paper, and this was obtained as a first adhesive resin layer adherend.

[0087] Next, a polyurethane-based thermoplastic hot-melt resin obtained using the same raw materials and manufacturing method as the first resin layer was used as a second adhesive resin layer. Next, a resin mainly composed of a polyester-based polyurethane resin with a softening point of 80°C and a melting point temperature of 150°C was used as a base material layer, and the resin was extruded and stretched into a sheet to obtain a film having a thickness of 50 μm, a stress of 0.5 MPa at 50% elongation, and a breaking strength of 26 MPa.

[0088] In terms of dimensions in the short side direction of the adhesive member, the first adhesive resin layer was slit to be 1 cm, the second adhesive resin layer was slit to be 0.5 cm, and the substrate was molded to be 1.2 cm.

[0089] The dimensions of the adhesive member in the long side direction were all 50 cm for the first adhesive resin layer, the second adhesive resin layer, and the base material layer.

[0090] The obtained adhesive resin layer was laminated on the substrate layer to obtain an adhesive member composed of the first adhesive resin layer, the substrate layer, and the second adhesive resin layer.

[0091] Next, one adhesive surface of the adhesive member, i.e., the first adhesive resin layer, is placed in contact with the first adherend, and the other adhesive surface of the adhesive member, i.e., the second adhesive resin layer, is placed in contact with the second adherend, and the adhesive members are then heated at a temperature of 140°C and a pressure of 1 kg / cm using a flat plate heat press. ２ The adhesive was then thermally bonded under the conditions of 10 seconds, 10 seconds, and 10 seconds to form a bonded joint, thereby obtaining a bonded product.

[0092] The peel strength of the first and second adherends, the peel strength ratio between the first adherend and the second adherend, the surface area ratio between the second adhesive resin layer and the first adhesive resin layer, the dimensional ratio between the substrate and the first adhesive resin layer in the short side direction of the adhesive member, and the peel strength of the adhesive joint of the obtained adhesive processed product were each measured.

[0093] Next, the adhesive stability and aesthetics were evaluated according to the evaluation criteria in Table 1, and the overall evaluation was performed according to the evaluation criteria in Table 2. Table 3 shows the numerical values ​​and evaluation results.

[0094] (Example 2) In the adhesive processed product of Example 1, a nylon coated fabric was used as the first adherend 2a. That is, a taffeta fabric was woven using 33 dtex-26f nylon filament yarns for both the warp and weft fibers, with a warp density of 236 threads / 2.54 cm and a weft density of 197 threads / 2.54 cm. Then, a polyurethane resin was applied in an amount of 43 g / m. ２ The water resistance of the first adherend 2a measured in accordance with JIS L1092 (2009) 7.1.2B method was 10,000 mmH ２ 0 (98.1 kPa).

[0095] As the second adhesive resin layer 4b, a polyurethane-based moisture-curing reactive resin, i.e., a polyurethane-based resin (melting point temperature 100°C) with a viscosity of 5000 mPa·s (120°C), was applied to the substrate using a dispenser with a nozzle diameter of 0.3 mm under the dispensing conditions of a syringe temperature of 120°C and a nozzle temperature of 150°C.

[0096] The adhesive member 4 was obtained with the dimensions in the short side direction of the first adhesive resin layer 4a being 1.5 cm, the second adhesive resin layer 4b being 0.7 cm, and the substrate being 1.5 cm.

[0097] Except for the configuration of the adherend 2 and the adhesive member 4, a bonded article was produced under the same conditions as in Example 1. Table 3 shows the respective values ​​and the evaluation results.

[0098] (Example 3) In the adhesive processed product of Example 1, a coated nylon circular knitted fabric, i.e., a 75 dtex-72f nylon filament yarn, was used as the first adherend 2a, and an interlock structure knitted fabric was knitted on a 28G double-sided circular knitting machine, followed by relaxation, scouring, dyeing, and finishing setting, and a polyurethane resin was applied in an amount of 43 g / m ２ The water resistance of the first adherend 2a measured according to JIS L1092 (2009) 7.1.2B method was 8000 mmH ２ 0 (78.5 kPa).

[0099] As the second adherend 2b, a nylon circular knitted fabric, i.e., 75dtex-72f nylon filament yarn was used, and an interlock structure knitted fabric was knitted on a 28G double-sided circular knitting machine, and then the knitted fabric was relaxed, refined, dyed, and finished and set.

[0100] The adhesive member 4 was obtained with the dimensions in the short side direction of the first adhesive resin layer 4a being 2.5 cm, the second adhesive resin layer 4b being 1.5 cm, and the substrate being 2.4 cm.

[0101] Except for the configuration of the adherend 2 and the adhesive member 4, a bonded article was produced under the same conditions as in Example 1. Table 3 shows the respective values ​​and the evaluation results.

[0102] (Example 4) In the adhesive processed article of Example 1, an olefin-based nonwoven fabric, i.e., polypropylene with a fiber diameter of 3.2 μm, a fiber spacing of 16.3 μm, a thickness of 0.21 mm, and a bulkiness of 3.5 cm was used as the first adherend 2a. ３ / g, breathability 100cm ３ / cm ２ / sec, tensile strength 126N / 5cm, basis weight 60g / m ２ The spunbond nonwoven fabric thus formed was subjected to a calendering process with an upper angle of 80 degrees and a lower angle of 60 degrees.

[0103] Next, as the second adherend 2b, an olefin-based nonwoven fabric, i.e., polypropylene with a fiber diameter of 3.2 μm, a fiber spacing of 16.3 μm, a thickness of 0.21 mm, and a bulkiness of 3.5 cm ３ / g, breathability 100cm ３ / cm ２ / sec, tensile strength 126N / 5cm, basis weight 60g / m ２ A spunbonded nonwoven fabric was obtained.

[0104] In the configuration of the adhesive member 4, an olefin-based thermoplastic hot-melt resin, i.e., a resin mainly composed of a polypropylene resin with hot-melt adhesiveness and a softening point of 60°C and a melting point temperature of 90°C, was used as the first adhesive resin layer 4a, and the resin was extruded and stretched in the form of a sheet onto a release paper by an extrusion method to a film thickness of 100 μm, and then separated from the release paper to obtain an adhesive resin layer.

[0105] As the second adhesive resin layer 4b, an olefin-based thermoplastic hot-melt resin was obtained using the same raw materials and manufacturing method as those for the first resin layer.

[0106] The substrate layer 4c was made of an olefin-based nonwoven fabric obtained from the same raw materials and by the same manufacturing method as the first adherend 2a.

[0107] The adhesive member 4 was obtained with the dimensions in the short side direction of the first adhesive resin layer 4a being 1.5 cm, the second adhesive resin layer 4b being 1.2 cm, and the substrate being 1.4 cm.

[0108] Except for the configuration of the adherend 2 and the adhesive member 4, a bonded article was produced under the same conditions as in Example 1. Table 3 shows the respective values ​​and the evaluation results.

[0109] Example 5 In the second adhesive resin layer 4b of the adhesive processed product of Example 3, a polyurethane-based moisture-curing reactive hot melt resin, i.e., a resin (melting point temperature 110°C) mainly composed of polyurethane with hot melt adhesiveness and a viscosity at 120°C of approximately 12,000 mPa·s, was used to form the adhesive member. The resin was discharged from a nozzle tip at a discharge temperature of 110°C in the form of dots with a diameter of 1.0 mm and a thickness of 100 μm onto the surface of the base material layer opposite to the first adhesive resin layer, as shown in FIG. 6, and continuously discharged at intervals of 1 mm from the end of the dots in the short side direction 4d of the adhesive member and in the long side direction 4e of the adhesive member.

[0110] The dimension 4d' of the adhesive resin layer in the short side direction, i.e., the distance between the outermost edges of the adhesive member in the short side direction 4d, was 1.5 cm, and the dimension 4e' of the adhesive resin layer in the long side direction, i.e., the distance between the outermost edges of the adhesive member in the long side direction 4e, was 50 cm.

[0111] Except for the configuration of the second adhesive resin layer 4b, the bonded processed product was produced under the same conditions as in Example 3. Table 3 shows the respective values ​​and the evaluation results.

[0112] (Comparative Example 1) The second adherend 2b was made of the same nylon woven fabric material as the first adherend 2a in the adhesive processed product of Example 2, and a polyurethane resin was applied in an amount of 14 g / m ２ A nylon-coated fabric coated with a cellulose acylate resin was used. In the dimensions of the short side direction of the adhesive member 4, the first adhesive resin layer 4a was 1.5 cm, the second adhesive resin layer 4b was 2 cm, and the substrate was 1.5 cm, and an adhesive member 4 was obtained.

[0113] Except for the configuration of the adherend 2 and the adhesive member 4, a bonded article was produced under the same conditions as in Example 1. Table 3 shows the respective values ​​and the evaluation results.

[0114] Comparative Example 2 In the bonded article of Example 3, the second adherend 2b in Example 3, i.e., a nylon circular knitted fabric, was used as the first adherend 2a. The first adherend 2a in Example 3, i.e., a coated nylon circular knitted fabric, was used as the second adherend 2b.

[0115] The adhesive member 4 did not use the second adhesive resin layer 4b and the base material layer 4c, but was composed of only the first adhesive resin layer 4a, that is, the polyurethane-based thermoplastic hot-melt resin.

[0116] The adhesive member 4 was obtained with the first adhesive resin layer 4a having a dimension of 5 cm in the short side direction of the adhesive member 4.

[0117] Except for the configuration of the adherend 2 and the adhesive member 4, the bonded processed article was produced under the same conditions as in Example 1. Table 3 shows the respective values ​​and the evaluation results.

[0118] (Comparative Example 3) In the adhesive processed article of Example 1, the first adherend 2a was obtained by coating a solventless silicone resin onto release paper, i.e., glassine paper, as a release treatment, and then heating it in a drying oven to harden the silicone resin.

[0119] The second adherend 2b was made of the same material as the first adherend 2a. Next, in constructing the adhesive member 4, an epoxy-based hot-melt resin, i.e., a resin with a softening point of 180°C, a melt viscosity of 250 (150°C, ICI viscometer mPa·s), and solvent solubility (MEK 70%), was used for the first adhesive resin layer 4a. The adhesive member 4 was constructed using only the first adhesive resin layer 4a, without using the second adhesive resin layer 4b or the base layer 4c.

[0120] The adhesive member 4 was obtained with the first adhesive resin layer 4a having a dimension of 5 cm in the short side direction of the adhesive member 4.

[0121] Except for the configuration of the adherend 2 and the adhesive member 4, a bonded article was produced under the same conditions as in Example 1. Table 3 shows the respective values ​​and the evaluation results.

[0122] Comparative Example 4: In the adhesive product of Comparative Example 1, a 70 dtex nylon double-woven fabric was used for the base material layer 4c. A double-woven weave portion was positioned in the center of the short side direction 4d of the adhesive member and continued along the long side direction 4e of the adhesive member, resulting in the base material layer 4c. A first adhesive resin layer 4a was positioned on one outermost surface of the resulting base material layer 4c, and a second adhesive resin layer 4b was positioned on the opposite outermost surface. The first adhesive resin layer, the second adhesive resin layer, and the base material layer 4c were each slit to a dimension of 1.5 cm along the short side direction of the adhesive member, thereby obtaining the adhesive member 4. Aside from the above configuration, the adhesive product was produced under the same conditions as Comparative Example 1. Table 3 shows the numerical values ​​and evaluation results.

[0123]

[0124] The adhesive processed products of Examples 1 to 5 were adhesive processed products with excellent adhesive stability by configuring the surface area 5b of the second adhesive resin layer to be smaller than the surface area 5a of the first adhesive resin layer, under the condition that the peel strength of the first adherend 2a was lower than the peel strength of the second adherend 2b.

[0125] The adhesive processed articles of Examples 1 to 3 were adhesive processed articles with even better adhesive stability by further setting the ratio of the surface area 5a of the second adhesive resin layer 4b to the surface area 5a of the first adhesive resin layer within a preferred range.

[0126] The adhesive processed products of Examples 1 and 2 were adhesive processed products with better adhesive stability and aesthetic appeal by setting the peel strength ratio between the first adherend 2a and the second adherend 2b and the dimensional ratio between the substrate and the first adhesive resin layer 4a in the short side direction of the adhesive member 4 within preferred ranges.

[0127] In the adhesive processed product of Comparative Example 1, the surface area 5b of the second adhesive resin layer was configured to be larger than the surface area 5a of the first adhesive resin layer, so that stress was concentrated at the interface between the base material layer 4c and the second adhesive resin layer 4b during peeling, resulting in an adhesive processed product with poor adhesive stability.

[0128] In the adhesive processed product of Comparative Example 2, the peel strength of the first adherend 2a and the peel strength of the second adherend 2b were equal, and the adhesive member 4 had only the first adhesive resin layer 4a, i.e., a single-layer adhesive layer, so stress dispersion did not work during peeling, and the resin itself was destroyed, resulting in an adhesive processed product with poor adhesive stability.

[0129] In addition to the configuration of Comparative Example 2, the adhesive processed product of Comparative Example 3 had the same structure as Comparative Example 2, but the material of the adherend 2 and the components of the adhesive resin layer were different from the preferred form. This resulted in an adhesive processed product with poor adhesive stability and aesthetics due to the low peel strength of the adherend 2 itself and the hardening of the adhesive resin layer.

[0130] In the adhesive processed product of Comparative Example 4, the surface area 5b of the second adhesive resin layer and the surface area 5a of the first adhesive resin layer are the same area and have the same short side dimension as the base material layer 4c. As a result, not only does stress concentrate at the interface between the base material layer 4c and the second adhesive resin layer 4b when peeled off, but the thickness of the base material layer causes the texture to harden, resulting in an adhesive processed product with poor adhesive stability and aesthetics.

[0131] That is, the more requirements of the invention the bonded article satisfies, the more excellent the bonded article is overall.

[0132] The present invention can be used to produce bonded products that are excellent in adhesive strength, aesthetics, and productivity.

[0133] 1: Adhesive processed product 2: Adherend 2a: First adherend 2b: Second adherend 3: Adhesive part 4: Adhesive member 4a: First adhesive resin layer 4b: Second adhesive resin layer 4c: Base material layer 4d: Short side direction of adhesive member 4d': Short side direction of adhesive resin layer 4e: Long side direction of adhesive member 4e': Long side direction of adhesive resin layer 5a: Surface area of ​​first adhesive resin layer 5b: Surface area of ​​second adhesive resin layer 6: Adhesive surface

Claims

1. A bonded article comprising at least a first adherend, a second adherend, and an adhesive member interposed between the first adherend and the second adherend, the adhesive member comprises at least a first adhesive resin layer, a second adhesive resin layer, and a base material layer interposed between the first adhesive resin layer and the second adhesive resin layer; The first adhesive resin layer is in contact with the first adherend, and the second adhesive resin layer is in contact with the second adherend, and the peel strength of the first adherend measured based on JIS L1086 (2020) 7.10 is lower than the peel strength of the second adherend, and the surface area of ​​the second adhesive resin layer is smaller than the surface area of ​​the first adhesive resin layer.

2. 2. The adhesive processed product according to claim 1, wherein the ratio of the surface area of ​​the second adhesive resin layer to the surface area of ​​the first adhesive resin layer is 10% or more and 70% or less.

3. The first adherend and the second adherend have a peel strength of the first adherend measured based on JIS L1086 (2020) 7.

10. The adhesive processed product according to claim 1 or 2, characterized in that the ratio of the peel strength of the first adherend to the peel strength of the second adherend is 5% or more and 90% or less.

4. 3. The bonded article according to claim 1, wherein the first adherend and the second adherend are selected from at least a woven or knitted fiber fabric, a nonwoven fabric, and a film.

5. 3. The adhesive processed product according to claim 1, wherein the ratio of the dimension of the base material layer in the short side direction of the adhesive member to the dimension of the first adhesive resin layer is 100% or more and 150% or less.