Complex

Abstract

An object of the present invention is to provide a composite capable of exhibiting a plurality of functions in both the thickness direction and the plane direction.SOLUTION: A composite comprising a first composition and a second composition being in contact with the first composition and at least partially covering the first composition, wherein the first composition contains a first resin, the second composition contains a second resin, and in a first direction in which the first composition extends, at least one portion P where only the first composition is present is present in a first cross section of the composite orthogonal to the first direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a composite. [Background technology]

[0002] In laminates having a structure in which multiple layers are laminated, such as double-sided pressure-sensitive adhesive tapes, the functions of the layers are usually separated. For example, Patent Document 1 discloses a laminate film in which an antistatic layer (B) and a heat-sealable layer (C) are separate layers.

[0003] In such laminates, different layers exhibit different functions in the thickness direction of the laminate, but generally have the same function in the plane direction of the laminate. That is, in the laminate film of Patent Document 1, the antistatic layer exhibits only the antistatic function, and the heat-sealable layer exhibits only the heat-sealability. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2019 / 172340 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, there has been a demand for a laminate that can exhibit multiple functions in both the thickness direction and the surface direction, but no laminate with such a configuration exists.

[0006] Therefore, an object of the present invention is to provide a composite that can exhibit multiple functions in both the thickness direction and the surface direction. [Means for solving the problem]

[0007] The present invention provides a method for producing a composition comprising: a second composition in contact with the first composition and at least partially covering the first composition, the first composition comprises a first resin; the second composition comprises a second resin; In a first direction in which the first composition extends, there is at least one portion P in which only the first composition exists in a first cross section of the composite perpendicular to the first direction, which allows the composite to exhibit multiple functions in both the thickness direction and the surface direction (respectively).

[0008] In one embodiment of the complex of the present invention, the moieties P are present at both ends of the complex in the first direction.

[0009] In one embodiment of the complex of the present invention, the moiety P is present at one end of the complex in the first direction.

[0010] In one embodiment of the complex of the present invention, the moiety P is present at a location other than both ends of the complex in the first direction.

[0011] In one embodiment of the complex of the present invention, the moiety P is present at both ends and at locations other than both ends of the complex in the first direction.

[0012] In one embodiment of the complex of the present invention, the moiety P is present at one end and at a location other than both ends of the complex in the first direction.

[0013] In one embodiment of the composite of the present invention, the contour of the second composition in the first cross section and the contour of the first composition in the first cross section of the portion P are the same.

[0014] In one embodiment of the composite of the present invention, the second composition in the first cross section covers the entire periphery of the first composition.

[0015] In one embodiment of the composite of the present invention, the second composition in the first cross section covers 40% to less than 100% of the periphery of the first composition.

[0016] In one embodiment of the composite of the present invention, the first resin has a softening point of 100° C. or lower.

[0017] In one embodiment of the composite of the present invention, the width of the composite is 5 μm or more.

[0018] In one embodiment of the composite of the present invention, the first resin has a glass transition temperature of 50° C. or lower.

[0019] In one embodiment of the composite of the present invention, the viscosity I of the first composition at 180° C. is 500,000 mPa·s or less.

[0020] In one embodiment of the composite of the present invention, the viscosity O of the second composition at 180°C is higher than the viscosity I.

[0021] In one embodiment of the composite of the present invention, the first resin is a thermosetting resin or a UV-curable resin, and the softening point of the first resin before curing is 100° C. or lower.

[0022] In one embodiment of the composite of the present invention, the first resin is a thermosetting resin or a UV-curable resin, and the glass transition temperature of the first resin before curing is 50° C. or lower.

[0023] In one embodiment of the complex of the present invention, the first composition further comprises microparticles.

[0024] In one embodiment of the composite of the present invention, the second composition is a pressure sensitive adhesive or adhesive.

[0025] In one embodiment of the composite of the present invention, the pressure sensitive adhesive or adhesive is a hot melt type, a heat curing type, or a UV curing type. [Effects of the Invention]

[0026] According to the present invention, it is possible to provide a composite that can exhibit multiple functions in both the thickness direction and the surface direction. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a plan view schematically showing an example of the composite of the present invention. [Figure 2] FIG. 2 is a cross-sectional view schematically showing an example of the composite of FIG. [Figure 3] FIG. 3 is a plan view schematically showing another example of the composite of the present invention. [Figure 4] FIG. 4 is a cross-sectional view schematically showing an example of the composite of FIG. [Figure 5] FIG. 5 is a plan view schematically showing another example of the composite of the present invention. [Figure 6] FIG. 6 is a cross-sectional view schematically showing an example of the composite of FIG. [Figure 7] FIG. 7 is a plan view schematically showing another example of the composite of the present invention. [Figure 8] FIG. 8 is a cross-sectional view schematically showing an example of the composite of FIG. [Figure 9] FIG. 9 is a plan view schematically showing another example of the composite of the present invention. [Figure 10] FIG. 10 is a plan view schematically showing another example of the composite of the present invention. [Figure 11] FIG. 11 is a cross-sectional view that schematically shows a conventional laminate having a typical two-layer structure. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, embodiments of the present invention will be described. These descriptions are for the purpose of illustrating the present invention and are not intended to limit the present invention in any way.

[0029] In the present invention, two or more embodiments can be combined in any manner.

[0030] Unless otherwise specified, the materials, components, compounds, resins, catalysts, and solvents described herein may be used alone or in combination of two or more.

[0031] In this specification, ordinal numbers such as first, second, third, etc. in elements such as composition, resin, and direction are symbols for distinguishing each element, unless otherwise specified.

[0032] In this specification, for the convenience of explanation, each step is numbered and expressed as step (1), etc., but these numbers are used to identify or distinguish each step and do not indicate the order of the steps.

[0033] The accompanying drawings are schematic diagrams given priority for facilitating understanding of the present invention, and therefore the scale and shapes of the layers in the drawings are not accurate.

[0034] In the present invention, the viscosity I of the first composition at 180° C. and the viscosity O of the second composition at 180° C. are measured by the method described in the Examples.

[0035] (complex) The present invention provides a method for producing a composition comprising: a second composition in contact with the first composition and at least partially covering the first composition, the first composition comprises a first resin; the second composition comprises a second resin; The composite has, in a first direction in which the first composition extends, at least one portion P in which only the first composition is present in a first cross section of the composite perpendicular to the first direction.

[0036] FIG. 1 is a plan view schematically illustrating an example of a composite of the present invention. In the example composite 1 of FIG. 1, a first composition 10 is partially covered with a second composition 20. In FIG. 1, the vertical direction of the paper is the first direction. The AA cross section of FIG. 1 is perpendicular to the first direction and is the first cross section. Reference numeral 30 denotes a portion P where only the first composition 10 is present in the first cross section of the composite 1 perpendicular to the first direction. In the example of FIG. 1, portions P30 are present at both ends of the composite 1 in the first direction. Although not shown, the first direction in the plan views of FIGS. 3, 5, 7, 9, and 10 is the same as the first direction in FIG. 1.

[0037] A "first cross section of a composite that is perpendicular to the first direction" refers to a plane in which the first direction is normal to the first cross section. The first cross section may be perpendicular to the first direction at any position in the composite. The "first" in "first cross section" is intended to identify a cross section of a composite in a specific direction, and does not indicate that there are multiple cross sections in the same direction. For example, in Figure 1, both the AA cross section and the BB cross section are cross sections of the composite that are perpendicular to the first direction, and therefore are "first cross sections." However, in Figure 1, the AA cross section is the first cross section at portion P, and the BB cross section is the first cross section at a portion other than portion P.

[0038] Fig. 2 is a cross-sectional view schematically illustrating an example of the composite of Fig. 1. Fig. 2(a) is a cross-sectional view taken along the line AA in Fig. 1 (i.e., the first cross-section), in which only the first composition 10 is present. Fig. 2(b) to (g) are examples of cross-sectional views taken along the line BB in Fig. 1. The cross-section of the example of Fig. 1 taken along the line BB may be any of Fig. 2(b) to (g).

[0039] In Fig. 2(b), the cross-sectional outline of the first composition and the cross-sectional outline of the second composition are rectangular. In Fig. 2(b), the second composition covers the entire periphery of the first composition.

[0040] In (c) of Figure 2, the cross-sectional outline of the first composition and the cross-sectional outline of the second composition are rectangular. In (c) of Figure 2, the second composition covers part of the periphery of the first composition.

[0041] In (d) of Figure 2, the cross-sectional shape of the first composition is rectangular, and the cross-sectional shape of the second composition is circular. In (d) of Figure 2, the second composition covers the entire periphery of the first composition.

[0042] In (e) of Figure 2, the cross-sectional shape of the first composition is circular, and the cross-sectional shape of the second composition is rectangular. In (e) of Figure 2, the second composition covers the entire periphery of the first composition.

[0043] In Fig. 2(f), the cross-sectional shape of the first composition is semicircular, and the cross-sectional shape of the second composition is rectangular. In Fig. 2(f), the second composition covers part of the periphery of the first composition.

[0044] In Fig. 2(g), the cross-sectional outline of the first composition and the cross-sectional outline of the second composition are circular. In Fig. 2(g), the second composition covers the entire periphery of the first composition.

[0045] In the composite of the present invention, for example, as shown in Figures 1 and 2, there is a portion P in the first cross section where only the first composition is present, and therefore, multiple functions can be exerted in the thickness direction (the vertical direction in Figure 2) and the surface direction (the vertical and horizontal directions in Figure 1).

[0046] For example, using the composites of Figures 1 and 2(b) as an explanation, if the first composition is conductive and the second composition is adhesive, in the planar direction (the up-down and left-right directions in Figure 1), the second composition portion will exhibit adhesiveness and the first composition portion will exhibit conductivity, and in the thickness direction (the up-down and left-right directions in Figure 2(b)), the second composition portion will exhibit adhesiveness and the first composition portion will exhibit conductivity.

[0047] 11 is a cross-sectional view schematically showing a conventional laminate having a typical two-layer structure. When a conventional laminate 100 has a conductive layer 110 and an adhesive layer 120, the conductive layer 110 provides conductivity and the adhesive layer 120 provides adhesion in the thickness direction, but the surface direction (i.e., when viewed from a plan view) provides only one of the conductive layer 110 and the adhesive layer 120.

[0048] The outline of the first composition in the first cross section at part P and the outline of the first composition in the first cross section other than part P may be the same (e.g., (a) and (b) in Figure 2) or may be different (e.g., (a) and (e) in Figure 2).

[0049] The first composition may have the same or different shapes in the first direction. The first composition may have the same or different dimensions in the first cross section in the first direction. For example, the shapes of the first cross sections of the portion P and the portion other than the portion P may both be rectangular, and the dimensions of the first cross section of the portion P may be 2 cm x 1 cm, and the dimensions of the first cross section of the portion other than the portion P may be 1 cm x 0.5 cm.

[0050] Figure 3 is a plan view schematically showing another example of the composite of the present invention. The composite 1 of the example in Figure 3 is similar to the composite 1 of the example in Figure 1, except that the dimensions of the first composition 10 at both ends in the first direction (i.e., portion P30) are different. In the example in Figure 3, the outer shape of the first composition 10 in portion P30 is the same as the outer shape of the second composition 20 other than portion P30.

[0051] FIG. 4 is a cross-sectional view schematically illustrating an example of the composite of FIG. 3. FIG. 4(a) is a cross-sectional view taken along the line AA in FIG. 3 (i.e., the first cross-section), in which only the first composition 10 is present. FIG. 4(b) is an example of a cross-sectional view taken along the line BB in FIG. 3. In the example of the composite of FIGS. 3 and 4, the outer shape of the second composition 20 in the first cross-section (i.e., the outer dimensions of the second composition in FIG. 4(b)) matches the outer shape of the first composition 10 in the first cross-section in portion P30 (i.e., the outer dimensions of the first composition in FIG. 4(a)).

[0052] Although not shown, the cross section (b) in the BB cross section and CC cross section in FIGS. 4, 6 and 8 may be any of (c) to (g) in FIG.

[0053] Fig. 5 is a plan view schematically showing another example of the composite of the present invention. In the composite 1 of the example of Fig. 5, a portion P30 is present in a location other than both ends in the first direction.

[0054] Figure 6 is a cross-sectional view schematically illustrating an example of the composite of Figure 5. Figure 6(a) is a cross-sectional view taken along the line AA of Figure 5 (i.e., the first cross-section), in which only the first composition 10 is present. Figure 6(b) is an example of a cross-sectional view taken along the line BB and CC of Figure 5.

[0055] Figure 7 is a plan view schematically showing another example of the composite of the present invention. In the composite 1 of the example in Figure 7, a portion P30 is present in a location other than both ends in the first direction. In the example in Figure 7, the outer shape of the first composition 10 in the portion P30 is the same as the outer shape of the second composition 20 other than the portion P30.

[0056] Figure 8 is a cross-sectional view schematically illustrating an example of the composite of Figure 7. Figure 8(a) is a cross-sectional view taken along the line AA of Figure 7 (i.e., the first cross-section), in which only the first composition 10 is present. Figure 8(b) is an example of a cross-sectional view taken along the line BB and CC of Figure 7.

[0057] In the composite of the present invention, when viewed along a first direction, there is at least one portion P in which only the first composition is present in a first cross section. In one embodiment, the number of portions P is one. In another embodiment, the number of portions P is two or more.

[0058] The location of moiety P in the complex of the present invention is not particularly limited. In one embodiment, moiety P is present at one end or both ends of the complex in the first direction. In another embodiment, moiety P is present at a location other than both ends of the complex in the first direction (see, for example, Figure 5). In yet another embodiment, moiety P is present at a location other than both ends and both ends of the complex in the first direction (see, for example, Figure 9). In yet another embodiment, moiety P is present at a location other than both ends and one end of the complex in the first direction (see, for example, Figure 10).

[0059] The outer shape of the first composition in the first cross section of portion P can be any shape, such as a circle, an ellipse, a rectangle, or any other regular polygon or irregular shape.

[0060] The outer shape of the first composition in the first cross section other than the portion P can be any shape such as a circle, an ellipse, a rectangle, any other regular polygon, or an irregular shape.

[0061] The outer shape of the first composition in the first cross section at portion P may be the same as or different from the outer shape of the second composition in the first cross section other than portion P. Furthermore, the outer shape of the first composition in the first cross section other than portion P may be the same as or different from the outer shape of the second composition in the first cross section other than portion P. In one embodiment, the outer shape of the second composition in the first cross section other than portion P matches the outer shape of the first composition in the first cross section at portion P.

[0062] In the first cross section, the second composition at least partially covers the first composition except for portion P. In one embodiment, in the first cross section, the second composition covers the entire periphery of the first composition except for portion P (see, for example, (b), (d), (e), and (g) in FIG. 2). In another embodiment, in the first cross section, the second composition covers 40 to 100% of the periphery of the first composition except for portion P.

[0063] The shape of the first composition is not particularly limited as long as it extends in the first direction, and can be any shape. In one embodiment, the shape of the first composition is a rod, a thread, a column, or a hollow cylinder.

[0064] The dimensions of the first composition are not particularly limited as long as they extend in the first direction, and can be any dimension. In one embodiment, the first composition has the largest dimension in the first direction, and the dimensions in two directions perpendicular to the first direction in the first cross section (e.g., the vertical and horizontal directions in FIG. 2) are smaller than the dimension in the first direction. In another embodiment, the first composition has the largest dimension in the first direction, the dimension in a second direction perpendicular to the first direction in the first cross section (e.g., the horizontal direction in FIG. 2) is smaller than the dimension in the first direction, and the dimension in a third direction perpendicular to the second direction in the first cross section (e.g., the vertical direction in FIG. 2) is smallest. In yet another embodiment, the dimension in the first direction and the dimension in the second direction (e.g., the horizontal direction in FIG. 2) are the same, and the dimension in the third direction (e.g., the vertical direction in FIG. 2) is smallest.

[0065] The shape of the second composition is not particularly limited as long as it at least partially covers the first composition, and can be any shape. In one embodiment, the shape of the second composition is a hollow rod, a hollow thread, or a hollow cylinder.

[0066] The cross-sectional shape of the second composition in the first cross section other than the portion P can be any shape, such as a circle, an ellipse, a rectangle, or any other regular polygon or irregular shape.

[0067] The dimensions of the second composition are not particularly limited as long as it at least partially covers the first composition, and it can have any dimensions.

[0068] The complex may be axisymmetric or asymmetric with respect to a first direction or a second direction perpendicular to the first direction (for example, the left-right direction in FIG. 2).

[0069] When viewed in a plan view (e.g., see FIG. 1 ) with the first direction of the composite as the up-down direction, the area ratio of the portion P to the area other than the portion P is not particularly limited and can be any area ratio. In one embodiment, the total area of ​​the portion P is larger than the total area of ​​the area other than the portion P. In another embodiment, the total area of ​​the portion P is equal to the total area of ​​the area other than the portion P. In yet another embodiment, the total area of ​​the portion P is smaller than the total area of ​​the area other than the portion P.

[0070] When a plurality of moieties P are present in the first direction of the complex, the moieties P may be arranged at equal intervals or at random intervals in the first direction.

[0071] (First composition) The first composition includes a first resin, and the first composition is different from the second composition.

[0072] The first resin can be appropriately selected depending on the use of the composite, and examples thereof include UV-curable resins, thermosetting resins, thermoplastic resins, silicone-based polymers, natural rubber, and synthetic rubber.

[0073] Examples of UV-curable resins include radically polymerizable compounds, photocationically polymerizable compounds, and photoanionically polymerizable compounds.

[0074] The radical polymerizable compound may be any compound having one or more radical polymerizable functional groups in the molecule, and is preferably a compound having one or more ethylenically unsaturated groups in one molecule, such as a vinyl group, a (meth)acryloyl group, or an allyl group.

[0075] Examples of the radically polymerizable compound having a vinyl group include aromatic vinyl compounds such as styrene and vinyl toluene; heterocycle-containing vinyl compounds such as vinyl imidazole and vinyl pyridine; and vinyl ethers such as n-propyl vinyl ether, isopropyl vinyl ether, n-butyl vinyl ether, 2-hydroxyethyl vinyl ether, cyclohexanedimethanol monovinyl ether, diethylene glycol monovinyl ether, 4-hydroxybutyl vinyl ether, cyclohexyl vinyl ether, dodecyl vinyl ether, octadecyl vinyl ether, lauryl vinyl ether, cetyl vinyl ether, and 2-ethylhexyl vinyl ether.

[0076] Examples of radically polymerizable compounds having a (meth)acryloyl group include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, and maleic acid, as well as salts, esters, acid amides, and acid anhydrides thereof; urethane acrylate, acrylonitrile, styrene derivatives, various unsaturated polyesters, unsaturated polyethers, unsaturated polyamides, and unsaturated polyurethanes.

[0077] The (meth)acryloyl group refers to an acryloyl group or a methacryloyl group.

[0078] Specific examples of the allyl compound include monofunctional allyl compounds such as allyl alcohol.

[0079] The photocationically polymerizable compound may be any compound having one or more photocationically polymerizable functional groups in one molecule, and is preferably a compound having one or more photocationically polymerizable functional groups in one molecule, such as an epoxy group, an oxetanyl group, a hydroxyl group, a vinyl ether group, an episulfide group, an ethyleneimine group, or an oxazoline group.

[0080] As the photocationically polymerizable compound having an epoxy group, a compound having one or more epoxy groups in one molecule can be used, and examples thereof include bisphenol A type epoxy resin, bisphenol F type epoxy resin, biphenyl type epoxy resin, tetramethylbiphenyl type epoxy resin, polyhydroxynaphthalene type epoxy resin, isocyanate-modified epoxy resin, 10-(2,5-dihydroxyphenyl)-9,10-dihydro Examples of the epoxy resin include 9-oxa-10-phosphaphenanthrene-10-oxide modified epoxy resins, phenol novolac type epoxy resins, cresol novolac type epoxy resins, hexanediol type epoxy resins, triphenylmethane type epoxy resins, tetraphenylethane type epoxy resins, dicyclopentadiene-phenol addition reaction type epoxy resins, phenol aralkyl type epoxy resins, naphthol novolac type epoxy resins, naphthol aralkyl type epoxy resins, naphthol-phenol co-condensed novolac type epoxy resins, naphthol-cresol co-condensed novolac type epoxy resins, aromatic hydrocarbon formaldehyde resin modified phenolic resin type epoxy resins, biphenyl-modified novolac type epoxy resins, trimethylolpropane type epoxy resins, alicyclic epoxy resins, acrylic resins having epoxy groups, polyurethane resins having epoxy groups, polyester resins having epoxy groups, and flexible epoxy resins.

[0081] Examples of photocationically polymerizable compounds having an oxetanyl group include oxetane compounds such as 1,4-bis[(3-ethyl-3-oxetanylmethoxy)methyl]benzene, 1,4-bis[(3-methyl-3-oxetanylmethoxy)methyl]benzene, 3-methyl-3-glycidyloxetane, 3-ethyl-3-glycidyloxetane, 3-methyl-3-hydroxymethyloxetane, 3-ethyl-3-hydroxymethyloxetane, and di{1-ethyl(3-oxetanyl)}methyl ether.

[0082] Other examples of UV-curable resins include the acrylic copolymers described in JP-A-2022-033767, the acrylic polymers described in JP-A-2021-059711, and photopolymerizable compounds.

[0083] Examples of thermosetting resins include urethane resins, phenolic resins, unsaturated polyester resins, epoxy resins, acrylic resins, urea resins, melamine resins, benzoguanamine resins, alkyd resins, vinyl ester resins, diallyl terephthalate resins, silicone resins, furan resins, ketone resins, xylene resins, thermosetting polyimide resins, benzoxazine resins, active ester resins, aniline resins, cyanate ester resins, and styrene-maleic anhydride (SMA) resins.

[0084] Specific examples of epoxy resins include bisphenol type epoxy resins such as bisphenol A type epoxy resins and bisphenol F type epoxy resins, aliphatic type epoxy resins, dicyclopentadiene type epoxy resins such as dicyclopentadiene-phenol addition reaction type epoxy resins, biphenyl type epoxy resins, tetramethylbiphenyl type epoxy resins, polyhydroxynaphthalene type epoxy resins, isocyanate-modified epoxy resins, 10-(2,5-dihydroxyphenyl)-9,10-dihydro Examples of epoxy resins that can be used include 9-oxa-10-phosphaphenanthrene-10-oxide modified epoxy resins, phenol novolac type epoxy resins, cresol novolac type epoxy resins, triphenylmethane type epoxy resins, tetraphenylethane type epoxy resins, phenol aralkyl type epoxy resins, naphthol novolac type epoxy resins, naphthol aralkyl type epoxy resins, naphthol-phenol co-condensed novolac type epoxy resins, naphthol-cresol co-condensed novolac type epoxy resins, aromatic hydrocarbon formaldehyde resin modified phenolic resin type epoxy resins, and biphenyl modified novolac type epoxy resins.

[0085] Examples of thermoplastic resins include polyolefin resins such as polypropylene and polymethylpentene, polycarbonate resins, (meth)acrylic resins, polystyrene resins, polyvinyl chloride resins, polyester resins such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate, cyclic olefin resins, polyamide resins, polyarylate resins and polyimide resins.

[0086] Other examples of the thermoplastic resin include the thermoplastic resins described in JP-A-09-216966.

[0087] The softening point of the first resin is not particularly limited and is, for example, 100° C. or lower, preferably 0 to 100° C., 20 to 100° C., or 30 to 100° C. When the softening point is 100° C. or lower, the first composition of the present invention can be stably discharged in a desired shape from the nozzle of a liquid application device when the first composition is applied using the device.

[0088] When the first resin is a curable resin, the softening point of the first resin before curing is, for example, 100°C or lower, preferably 0 to 100°C, 20 to 100°C, or 30 to 100°C.

[0089] The glass transition temperature (Tg) of the first resin is not particularly limited and is, for example, −70 to 150° C. In one embodiment, the Tg of the first resin is 50° C. or lower. From the viewpoint of being able to adjust the viscosity of the first composition of the present invention to an appropriate level when it is applied using a liquid application device, the Tg of the first resin is preferably −70° C. or higher and 30° C. or lower, more preferably −60° C. or higher and 20° C. or lower.

[0090] When the first resin is a curable resin, the Tg of the first resin before curing is, for example, −70 to 150° C. In one embodiment, when the first resin is a curable resin, the Tg of the first resin before curing is 50° C. or lower. The Tg of the first resin before curing is preferably −70° C. or higher and 30° C. or lower, more preferably −60° C. or higher and 20° C. or lower.

[0091] The first composition may contain, depending on the application and function, for example, fine particles, plasticizers, antioxidants, ultraviolet absorbers, antistatic agents, surfactants, colorants, light stabilizers, foaming agents, lubricants, crystal nucleating agents, crystallization accelerators, crystallization retarders, catalyst deactivators, impact modifiers, slip agents, crosslinking agents, crosslinking aids, tackifiers, silane coupling agents, processing aids, mold release agents, hydrolysis inhibitors, heat stabilizers, antiblocking agents, antifogging agents, flame retardants, flame retardant aids, light diffusing agents, antibacterial agents, antifungal agents, dispersants, resins other than the first resin (i.e., resins having a softening point higher than 100°C), solvents, and the like.

[0092] Examples of the fine particles include organic fine particles and inorganic fine particles.

[0093] Examples of organic fine particles include polyester-based resin fine particles, polyurethane-based resin fine particles, polyolefin-based resin fine particles, polymer-based fine particles made of styrene and polyolefin, and fine particles made of hydrogenated products thereof, cellulose-based resin fine particles, silicone-based fine particles, melamine-based resin fine particles, acrylic-based resin fine particles, acrylic-styrene copolymer fine particles, polycarbonate-based resin fine particles, polystyrene-based resin fine particles, and benzoguanamine-based resin fine particles.

[0094] Examples of inorganic fine particles include silica, alumina, mica, talc, aluminum flakes, and glass flakes.

[0095] The fine particles may also contain conductive fine particles, such as conductive metal particles of gold, silver, copper, platinum, zinc, iron, tin, lead, aluminum, cobalt, indium, nickel, chromium, titanium, antimony, bismuth, germanium, cadmium, etc., conductive metal oxide particles of indium tin oxide (ITO), ZnO, SnO, etc., conductive carbon particles of carbon nanotubes, Ketjen black, etc., and conductive polymers of polypyrrole, polyacetylene, polythiophene, etc.

[0096] The fine particles may also contain thermally conductive fine particles, such as boron nitride, aluminum nitride, silicon nitride, gallium nitride, aluminum oxide, silicon carbide, silicon dioxide, diamond, magnesium oxide, anhydrous magnesium carbonate, magnesium hydroxide, and aluminum hydroxide.

[0097] In one embodiment of the complex of the present invention, the first composition further comprises microparticles.

[0098] The viscosity of the first composition is not particularly limited and can be selected appropriately. In one embodiment, the viscosity I of the first composition at 180°C is 500,000 mPa·s or less. It is preferably 10 to 500,000 mPa·s, more preferably 100 to 450,000 mPa·s, particularly preferably 500 to 400,000 mPa·s, and most preferably 1,000 to 400,000 mPa·s. When the viscosity is 500,000 mPa·s or less, the first composition of the present invention can be stably discharged in a desired shape from the nozzle of a liquid application device when applied using the device.

[0099] The viscosity of the first composition and the second composition of the present invention can be measured by placing the composition in a Thermosel: Model 106 and heating it to a desired temperature, and using a composition viscosity measuring device: HA DVPlus manufactured by Brookfield Corporation.

[0100] (Second Composition) The second composition includes a second resin.

[0101] The second resin may be any of the resins listed as the first resin. The first resin and the second resin may be the same or different.

[0102] The second composition may contain, depending on the application and function, for example, fine particles, plasticizers, antioxidants, ultraviolet absorbers, antistatic agents, surfactants, colorants, light stabilizers, foaming agents, lubricants, crystal nucleating agents, crystallization accelerators, crystallization retarders, catalyst deactivators, thermoplastic resins, thermosetting resins, impact modifiers, slip agents, crosslinking agents, crosslinking aids, tackifiers, silane coupling agents, processing aids, mold release agents, hydrolysis inhibitors, heat stabilizers, antiblocking agents, antifogging agents, flame retardants, flame retardant aids, light diffusing agents, antibacterial agents, antifungal agents, dispersants, solvents, and the like.

[0103] Examples of the fine particles include organic fine particles and inorganic fine particles.

[0104] Examples of organic fine particles include polyester-based resin fine particles, polyurethane-based resin fine particles, polyolefin-based resin fine particles, polymer-based fine particles made of styrene and polyolefin, and fine particles made of hydrogenated products thereof, cellulose-based resin fine particles, silicone-based fine particles, melamine-based resin fine particles, acrylic-based resin fine particles, acrylic-styrene copolymer fine particles, polycarbonate-based resin fine particles, polystyrene-based resin fine particles, and benzoguanamine-based resin fine particles.

[0105] Examples of inorganic fine particles include silica, alumina, mica, talc, aluminum flakes, and glass flakes.

[0106] The fine particles may also contain conductive fine particles, such as conductive metal particles of gold, silver, copper, platinum, zinc, iron, tin, lead, aluminum, cobalt, indium, nickel, chromium, titanium, antimony, bismuth, germanium, cadmium, etc., conductive metal oxide particles of indium tin oxide (ITO), ZnO, SnO, etc., conductive carbon particles of carbon nanotubes, Ketjen black, etc., and conductive polymers of polypyrrole, polyacetylene, polythiophene, etc.

[0107] The fine particles may also contain thermally conductive fine particles, such as boron nitride, aluminum nitride, silicon nitride, gallium nitride, aluminum oxide, silicon carbide, silicon dioxide, diamond, magnesium oxide, anhydrous magnesium carbonate, magnesium hydroxide, and aluminum hydroxide.

[0108] The viscosity of the second composition is not particularly limited and can be selected appropriately. The viscosity O of the second composition at 180°C is, for example, 100 to 1,000,000 mPa·s. It is preferably 500 to 1,000,000 mPa·s, more preferably 500 to 800,000 mPa·s, and particularly preferably 1,000 to 500,000 mPa·s. A viscosity of 100 to 1,000,000 mPa·s can prevent the second composition from dripping from the nozzle of a liquid application device when the second composition of the present invention is applied using the device. In one embodiment, the viscosity O of the second composition at 180°C is higher than the viscosity I of the first composition at 180°C.

[0109] In one embodiment, the second composition is a pressure-sensitive adhesive or adhesive. In another embodiment, the second composition is a hot-melt pressure-sensitive adhesive or hot-melt adhesive. In yet another embodiment, the second composition is a heat-curable pressure-sensitive adhesive or heat-curable adhesive. In yet another embodiment, the second composition is a UV-curable pressure-sensitive adhesive or UV-curable adhesive.

[0110] In one embodiment, the second composition is a cured second composition. In another embodiment, the second composition is a cured pressure sensitive adhesive or a cured adhesive.

[0111] The composite of the present invention may be in contact with a first composition, with the second composition at least partially covering the first composition, and the third composition may be present inside the first composition, or the third composition may be present outside the second composition.

[0112] The dimensions of the composite of the present invention are not particularly limited and can be selected as appropriate. The shortest dimension (width, depth, or height) is, for example, 5 μm or more. It is preferably 5 to 5,000 μm, more preferably 10 to 3,000 μm, particularly preferably 50 to 3,000 μm, even more preferably 70 to 3,000 μm, and most preferably 100 to 2,000 μm. When the shortest dimension (width, depth, or height) is 5 μm or more, the distance between the nozzle of the composition-applying device and the adherend is within an appropriate range, preventing contact between the nozzle and the adherend. Furthermore, the composite can be applied with high precision. Dimensions other than the shortest dimension are not particularly limited and can be adjusted as appropriate. For example, when the height is the shortest dimension, the width and depth dimensions are not limited.

[0113] The shape of the complex is not particularly limited, and examples thereof include a sphere, an ellipsoid, a cylinder, a rectangular parallelepiped, a cone, a pyramid, other regular solids, and amorphous shapes.

[0114] In one embodiment, the first composition has a first function and the second composition has a second function that is different from the first function.

[0115] (Method of manufacturing the composite) The composite of the present invention can be produced, for example, by the following steps: step (1) of preparing a first composition and a second composition; step (2) of preparing a liquid applicator (wherein the liquid applicator has a double structure in which the discharge area of ​​a discharge nozzle for discharging the first composition is surrounded by the discharge area of ​​a discharge nozzle for discharging the second composition); step (3) of applying only the first composition using the liquid applicator; and step (4) of simultaneously applying the first composition and the second composition using the liquid applicator to cover at least a portion of the periphery of the first composition with the second composition. Here, steps (3) and (4) can be performed consecutively in any order, for any duration, and any number of times.

[0116] The liquid application device has a double structure in which the discharge area of ​​the discharge nozzle for discharging the first composition is surrounded by the discharge area of ​​the discharge nozzle for discharging the second composition, thereby allowing only the first composition to be applied in step (3), and at least a portion of the periphery of the first composition to be covered with the second composition when the first composition and the second composition are applied in step (4).

[0117] For example, when producing the composite 1 of FIG. 1, after steps (1) and (2), step (3) is first carried out for a certain period of time, then step (4) is carried out for a certain period of time, and then step (3) is carried out again for a certain period of time.

[0118] For example, when producing the composite 1 of FIG. 5, after steps (1) and (2), step (4) is first carried out for a certain period of time, then step (3) is carried out for a certain period of time, then step (4) is carried out again for a certain period of time, then step (3) is carried out again for a certain period of time, and then step (4) is carried out again for a certain period of time.

[0119] The method for producing the composite may include a step (5) of heating at least one of the first composition and the second composition to adjust the viscosity of the composition to a suitable level for application. A suitable heating device can be used to heat the composition. [Example]

[0120] The present invention will be described in more detail below by way of examples, but these examples are intended to illustrate the present invention and are not intended to limit the present invention in any way.

[0121] The materials used in the examples are as follows: First resin: polyester resin, manufactured by Unitika Ltd., trade name "Elitel (registered trademark) UE3400", softening point: 40°C, Tg: -20°C, viscosity at 180°C: 98670 mPa·s Second resin: polyester resin, manufactured by Unitika Ltd., trade name "Elitel (registered trademark) UE3231", softening point: 55°C, Tg: 3°C, viscosity at 180°C: 132000 mPa·s

[0122] Example 1 The first resin as the first composition and the second resin as the second composition were heated to 160°C and filled into separate syringes. Both compositions were then heated to 180°C. The first composition was dispensed onto a 75 μm thick PET film using a Musashi Engineering dispenser "ML-808GX," and the second composition was dispensed onto a 75 μm thick PET film using a Musashi Engineering dispenser "ML-8000X." A composite with a cross-sectional shape of 4000 μm wide and 900 μm high was obtained. The cross-sectional shape was measured using a KEYENCE VHX-H6M. Discharge nozzles are attached to the tips of the two dispensers, and as shown in the cross-sectional shape of the discharge part below, the discharge part of the discharge nozzle has a double structure in which a discharge area for discharging the first composition is surrounded by a discharge area for discharging the second composition. Cross-sectional shape of the discharge part of the double discharge nozzle in a cross section perpendicular to the discharge direction: First composition discharge part: circular shape with a diameter of 1 mm Partition wall thickness between the first composition discharge portion and the second composition discharge portion: 0.4 mm Second composition discharge part: a circular shape with a diameter of 3.8 mm and a circular part with a diameter of 1.8 mm missing The coating device uses two dispensers to deliver the liquid, with the discharge portions of each dispenser connected to a double discharge nozzle. The coating device is configured so that the first composition delivered from the ML-808GX is discharged from the inner discharge portion (first composition discharge portion), and the second composition delivered from the ML-8000X is discharged from the outer discharge portion (second composition discharge portion) surrounding the inner discharge portion.

[0123] Discharge conditions Distance from PET film: 1 mm Discharge pressure of first composition: 0.4 MPa Discharge pressure of second composition: 0.2 MPa Dispenser movement speed during application: 10m / min [Industrial Applicability]

[0124] According to the present invention, it is possible to provide a composite that can exhibit multiple functions in both the thickness direction and the surface direction. [Explanation of symbols]

[0125] 1: Complex 10: First composition 20: Second composition 30: Part P 100: Conventional laminate 110: Conductive layer 120:Adhesive layer

Claims

1. a first composition; and a second composition in contact with the first composition and at least partially covering the first composition, the first composition comprises a first resin; the second composition comprises a second resin; A composite, wherein in a first direction in which the first composition extends, there is at least one portion P in which only the first composition is present in a first cross section of the composite perpendicular to the first direction.

2. 2. The complex of claim 1, wherein the moieties P are present at both ends of the complex in the first direction.

3. 2. The complex of claim 1, wherein the moiety P is at one end of the complex in the first direction.

4. The complex of claim 1 , wherein the moiety P is present at a location other than both ends of the complex in the first direction.

5. 2. The complex of claim 1, wherein the moiety P is present at locations other than both ends of the complex in the first direction.

6. 2. The composite of claim 1, wherein the moiety P is present at one end and at a location other than both ends of the composite in the first direction.

7. The composite of claim 1 , wherein the contour of the second composition in the first cross section and the contour of the first composition in the first cross section in the portion P are identical.

8. 2. The composite of claim 1, wherein the second composition in the first cross section completely surrounds the first composition.

9. 10. The composite of claim 1, wherein the second composition in the first cross section covers from 40% to less than 100% of the perimeter of the first composition.

10. The composite of claim 1 , wherein the first resin has a softening point of 100° C. or less.

11. 10. The composite of claim 1, wherein the composite has a width of 5 μm or greater.

12. 2. The composite of claim 1, wherein the first resin has a glass transition temperature of 50°C or less.

13. 2. The composite according to claim 1, wherein the viscosity I of the first composition at 180°C is 500,000 mPa·s or less.

14. 14. The composite of claim 13, wherein the viscosity O of the second composition at 180°C is greater than the viscosity I.

15. 2. The composite according to claim 1, wherein the first resin is a thermosetting resin or a UV-curable resin, and the softening point of the first resin before curing is 100°C or lower.

16. 8. The composite according to claim 7, wherein the first resin is a thermosetting resin or a UV-curable resin, and the glass transition temperature of the first resin before curing is 50°C or lower.

17. The composite of claim 1 , wherein the first composition further comprises a microparticle.

18. The composite of claim 1 , wherein the second composition is a pressure sensitive adhesive or adhesive.

19. 20. The composite of claim 18, wherein the pressure sensitive adhesive or glue is a hot melt type, a heat curable type, or a UV curable type.

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