JP6844750B2 - Adhesive sheet and manufacturing method of goods using it - Google Patents

Description

The present invention relates to an adhesive sheet that can be used in various fields such as manufacturing of electronic devices.

Adhesive sheets are being studied for use in various electronic devices such as various displays and copiers and multifunction devices having a copying function and a scanning function.

The adhesive sheet is, for example, a double-sided adhesive tape in which adhesive layers are formed on both sides of a non-woven fabric base material, the double-sided adhesive tape has an interlayer fracture area ratio of 10% or less, and the double-sided adhesive tape is pulled. A double-sided adhesive sheet having a strength of 20 N / 10 mm or more in both the MD direction (longitudinal direction) and the TD direction (horizontal direction) is known (see, for example, Patent Document 1).

On the other hand, with the recent increase in functionality and precision of the electronic device, in the manufacturing scene, it is required to attach two or more adherends to a strictly specified position without a slight deviation. There is.

The pasting work is usually performed manually in many cases. When the above-mentioned affixing is performed manually, it is difficult to fix the adherend at a strict position by one affixing work. Therefore, usually, the adherend is placed in a predetermined position only by performing the re-pasting work multiple times. Is realized to be pasted.

However, the conventional adhesive sheet is designed to exhibit extremely excellent adhesive strength in preventing parts from falling off from the final product, so even if the adhesive tape and the adherend are attached. At that time, even when a very slight load was applied, excellent adhesive strength was already exhibited when the re-sticking work was performed, and the re-sticking work could not be performed efficiently in some cases. ..
On the other hand, if the adhesive strength of the adhesive sheet is set low in order to improve the reattachment work efficiency, there is a problem that the adherend and the adhesive sheet are likely to be displaced or peeled off only by applying a light load. ..

Further, when the adherend is a thin member (aluminum plate, glass, etc.) that is easily deformed or cracked, if the adhesive strength is high, the adherend will be deformed or cracked in the reattachment work. In some cases, the adherend could not be reused.

Japanese Unexamined Patent Publication No. 2001-152111

The problem to be solved by the present invention is to provide an adhesive sheet in which the attachment position of the adherend can be easily adjusted to a strictly specified position and the adherend is less likely to peel off over time. That is.

The present invention is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer containing particles on at least one surface, and the pressure-sensitive adhesive layer containing the particles is brought into contact with an adherend and attached to the surface of the adherend. It has been found that the above problem can be solved by using an adhesive sheet that adjusts the sticking position by shifting or re-sticking along the line.

That is, the present invention is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer containing particles on at least one surface, and the pressure-sensitive adhesive layer containing the particles is brought into contact with an adherend and attached, and then the adherend is attached. It relates to an adhesive sheet that adjusts the sticking position by shifting or re-sticking along the surface.

The adhesive sheet of the present invention can be reattached a plurality of times without causing deformation or cracking of the adherend even if the adherend is a thin member (aluminum plate, glass, etc.) that easily causes deformation or cracking. Therefore, it can be suitably used for applications in which two or more adherends are attached to strictly specified positions without slight deviation and are adhered and fixed. Further, since the position can be adjusted by attaching the laminated body of the adherend and the adhesive sheet to the other adherend and then shifting it along the surface of the adherend, a small number of two or more adherends can be formed. It can be suitably used for applications in which it is accurately attached to a strictly specified position without any deviation and is adhesively fixed.

It is a conceptual diagram which shows the evaluation method of re-pasting suitability. It is a conceptual diagram which shows the evaluation method of re-pasting suitability. It is a conceptual diagram which shows the measuring method of the surface adhesive strength.

The pressure-sensitive adhesive sheet of the present invention is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer containing particles on at least one surface, and the pressure-sensitive adhesive layer containing the particles is brought into contact with an adherend and attached, and then the adherence is performed. It is characterized by adjusting the sticking position by shifting or re-sticking along the surface of the body. By containing the particles, the particles can suppress the adhesive area between the adhesive and the adherend when the adherend and the adhesive layer come into contact with each other, and it is easy even after the adhesive sheet and the adherend come into contact with each other. The position can be adjusted by shifting (sliding) the laminate of the adherend and the adhesive sheet while contacting the other adherend.

The content of the particles in the pressure-sensitive adhesive layer is preferably 1.0 to 250% by mass, more preferably 1.0 to 150% by mass, and 1.0 to 70% by mass with respect to the pressure-sensitive adhesive. It is more preferable to have. When the content is within the above range, the particles can suppress the adhesive area between the adhesive and the adherend when the adherend and the adhesive layer come into contact with each other, while ensuring the final adhesive strength. , The adhesive sheet can be easily reattached even after it comes into contact with the adherend, and the laminate of the adherend and the adhesive sheet is shifted (sliding) while being in contact with the other adherend. The position can be adjusted.

The particle size preferably has an average particle diameter of 0.1 to 800 μm, more preferably 0.2 to 500 μm, more preferably 0.3 to 200 μm μm, and 0.5 to 150 μm. Is more preferable. Further, it is preferably 1.0 to 100 μm, more preferably 2.0 to 50 μm, and particularly preferably 3 μm to 40 μm. When the average particle size is within the above range, the particles can suppress the adhesive area between the adhesive and the adherend when the adherend and the adhesive layer come into contact with each other, while ensuring the final adhesive strength. It can be easily reattached even after the adhesive sheet and the adherend have come into contact with each other, and the position of the laminate of the adherend and the adhesive sheet while being in contact with the other adherend (sliding). Adjustments can be made. The average particle size of the particles refers to a value measured by a laser diffraction / scattering method using a particle size distribution measuring device "Mastersizer 2000" manufactured by Malvern.

The compounding volume ratio of the particles to the pressure-sensitive adhesive layer is preferably 1.0 to 500%, more preferably 2.0 to 150%, and 2.5 to 80%. It is more preferably 10 to 50%, particularly preferably 15 to 40%. By setting the above range, the final adhesive strength can be ensured, and the adhesive sheet can be easily reattached even after the adhesive sheet and the adherend come into contact with each other, and the adherend and the adhesive sheet are laminated. Can be shifted while being in contact with the other adherend to adjust the position.

The true specific gravity of the particles is preferably 0.05~7.0g / cm ^3, more preferably 0.1-5 g / cm ^3, in 0.1~3.5g / cm ³ It is particularly preferable to have.

The shape of the particles is not particularly limited, and examples thereof include plate-shaped, spherical, rod-shaped, scale-shaped, and other irregular shapes. Among them, spherical particles are used for adhesion to the adhesive sheet. It is preferable because it is easy to suppress the contact area between the adhesive surface and the adherend when the body comes into contact with the adherend and impart a position adjusting function.

The particles contained in the pressure-sensitive adhesive layer of the present invention include alumina particles, silica particles, talc particles, calcium carbonate, clay particles, diatomaceous earth particles, mica particles, magnesium silicate particles, and the like.
Can be mentioned. Examples of the microcapsules include microspheres in which a substance such as isobutane, propane, or pentane is encapsulated in an elastic shell. The shell may be formed of a heat-meltable substance or a substance that is destroyed by thermal expansion. Examples of the substance forming the shell include vinylidene chloride-acrylonitrile copolymer, polyvinyl alcohol, polyvinyl butyral, polymethylmethacrylate, polyacrylonitrile, polyvinylidene chloride, polysulfone and the like. Microcapsules can be produced by a conventional method, for example, a coacervation method, an interfacial polymerization method, or the like. The microcapsules include commercially available products such as Matsumoto Yushi Pharmaceutical Co., Ltd., trade name "Microsphere F30D, F50D" and Nippon Philite Co., Ltd., trade name "Expansel 461-40DU". It is also possible to use it. Among the above, it is preferable to use calcium carbonate. Further, it is preferable to use a filler other than the conductive filler and the heat conductive filler.

As the pressure-sensitive adhesive layer, for example, an adhesive layer having so-called pressure-sensitive adhesiveness (adhesiveness) at room temperature (about 25 ° C. or lower) can be used.

As the pressure-sensitive adhesive layer, it is preferable to use a pressure-sensitive adhesive layer having a shear storage elastic modulus G _{23 at} a frequency of 1 Hz and 23 ° C. in the range of 1.0 × 10 ⁴ Pa to 8.0 × 10 ^{6 Pa, preferably 7.0.} It is more preferable to use the one in the range of × 10 ⁴ Pa to 6.0 × 10 ⁶ Pa, and it is preferable to use the one in the range of 1.0 × 10 ⁵ Pa to 6.0 × 10 ^{6 Pa.} more preferably, more preferably to use a range of ^{5.0 × 10 5 Pa~6.0 × 10 6} Pa, in the range of ^{1.0 × 10 6 Pa~5.5 × 10 6} Pa It is particularly preferable to use one. By setting the shear storage elastic modulus G ₂₃ in the above range, when the adherend and the pressure-sensitive adhesive layer come into contact with each other, the particles can suppress the adhesion area between the pressure-sensitive adhesive and the adherend, and the pressure-sensitive adhesive sheet and the adherend can be formed. It can be easily reattached even after contact, and the position can be adjusted by shifting the laminate of the adherend and the adhesive sheet while contacting the other adherend, while the attachment position is Excellent adhesive strength can be exhibited by applying pressure after the determination.

As the pressure-sensitive adhesive layer, the center line average surface roughness Ra of the surface in contact with the adherend is preferably 0.1 μm to 10.0 μm, more preferably 0.5 μm to 5.0 μm. It is more preferably in the range of 0.7 μm to 2.5 μm, and particularly preferably in the range of 1.0 μm to 2.3 μm. By setting the center line average surface roughness Ra within the above range, the particles can suppress the adhesive area between the adhesive and the adherend when the adherend and the adhesive layer come into contact with each other, and the adhesive sheet and the adherend can be suppressed. Can be easily reattached even after they are in contact with each other, and the position can be adjusted by shifting the laminate of the adherend and the adhesive sheet while contacting the other adherend.

The center line surface average roughness Ra of the adhesive layer is determined by KEYENCE's "Color 3D Laser Microscope VK-9500" (each in a range of 50 μm × 50 μm square) on the surface of the adhesive layer. Surface measurement was performed three times using a lens magnification of 50 times, measurement mode: ultra-depth, pitch: 0.05 μm, optical zoom: 1.0 times), and the average value of the center line average surface roughness measured was obtained by adhering the above. The average surface roughness Ra of the center line of the surface in contact with the layer adherend was defined.

Examples of the resin component constituting the pressure-sensitive adhesive layer include natural rubber-based polymers, synthetic rubber-based polymers, acrylic-based polymers, silicone-based polymers, urethane-based polymers, vinyl ether-based polymers, and the like. Of these, it is preferable to use a synthetic rubber-based polymer or an acrylic-based polymer.

As the synthetic rubber-based polymer, it is preferable to use a styrene-based block copolymer. The styrene-based block copolymer refers to a triblock copolymer having a polystyrene unit (a1) and a polyolefin unit (a2), a diblock copolymer, or a mixture thereof.

Examples of the styrene-based block copolymer include polystyrene-poly (isopropylene) block copolymer, polystyrene-poly (isopropylene) block-polystyrene copolymer, polystyrene-poly (butadiene) block copolymer, and polystyrene. -Poly (butadiene) block-polystyrene copolymer, polystyrene-poly (butadiene / butylene) block copolymer, polystyrene-poly (butadiene / butylene) block-polystyrene copolymer, polystyrene-poly (ethylene / propylene) block Polymers, polystyrene-poly (ethylene / propylene) block-polystyrene copolymers, polystyrene-poly (ethylene / butylene) block copolymers, polystyrene-poly (ethylene / butylene) block-polystyrene copolymers, polystyrene-poly ( Ethylene-ethylene / propylene) block copolymers, polystyrene-poly (ethylene-ethylene / propylene) block-polystyrene copolymers and the like can be used. Among them, as the styrene-based block copolymer, it is preferable to use a block copolymer having a polystyrene unit (a1) and a polyisoprene unit (a2), and a polystyrene-poly (isopropylene) block copolymer weight is preferable. It is more preferred to use unions, polystyrene-poly (butadiene) block copolymers, polystyrene-poly (butadiene) block-polystyrene copolymers.

As the acrylic polymer, a polymer of an acrylic monomer can be used. As the acrylic monomer, (meth) acrylic acid, (meth) acrylic acid alkyl esters such as 2-ethylhexyl (meth) acrylic acid and n-butyl (meth) acrylic acid can be used.

A tackifier may be added to the adhesive component, if necessary.
The tackifier resin includes, for example, a rosin-based tackifier resin, a polymerized rosin-based tackifier resin, a polymerized rosin ester-based tackifier resin, and a rosinphenol-based tackifier resin for the purpose of adjusting the strong adhesiveness of the adhesive layer. , Stabilized rosin ester-based tackifier resin, disproportionate rosin ester-based tackifier resin, terpen-based tackifier resin, terpenphenol-based tackifier resin, petroleum resin-based tackifier resin and the like can be exemplified.

As the tackifier resin, it is preferable to use a terpene phenol-based tackifier resin among the above. As the terpene phenol-based tackifier resin, it is possible to select and use a conventionally known copolymer of a terpene monomer and phenol with a softening point of 100 ° C. to 125 ° C. to use the rubber-based block copolymer. It is preferable to improve the compatibility with the above, and as a result, to impart excellent adhesiveness.

The terpene phenol-based tackifier resin is preferably used in the range of 30 parts by mass to 120 parts by mass with respect to a total of 100 parts by mass of the synthetic rubber-based polymer or acrylic-based polymer which is the adhesive component, and 40 parts by mass. It is more preferable to use it in the range of parts to 100 parts by mass. Within the above range, even better adhesiveness can be imparted.

As the adhesive component, a component containing a cross-linking agent, other additives, or the like can be used, if necessary, in addition to the adhesive component.

The cross-linking agent includes known isocyanate-based cross-linking agents, epoxy-based cross-linking agents, aziridine-based cross-linking agents, polyvalent metal salt-based cross-linking agents, and metal chelate-based cross-linking agents for the purpose of improving the cohesive force of the adhesive layer. A keto-hydrazide-based cross-linking agent, an oxazoline-based cross-linking agent, a carbodiimide-based cross-linking agent, a silane-based cross-linking agent, a glycidyl (alkoxy) epoxysilane-based cross-linking agent, and the like can be used.

In addition to the above-mentioned components, the pressure-sensitive adhesive layer includes a foaming agent, a heat-expandable balloon, an antioxidant, a plasticizer, a filler, a pigment, an ultraviolet absorber, an ultraviolet stabilizer, a flame retardant, and the like. A flame retardant or the like can be used as long as the effect of the present invention is not impaired.

The pressure-sensitive adhesive sheet of the present invention is a so-called base material-less pressure-sensitive adhesive sheet composed of a single layer or a laminated pressure-sensitive adhesive layer, and a pressure-sensitive adhesive sheet having an pressure-sensitive adhesive layer on both sides of a support directly or via another layer. However, it is preferable to use a pressure-sensitive adhesive sheet having the pressure-sensitive adhesive layer directly or via another layer on both sides of the support.

Examples of the support include polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyamide resins such as polycarbonate, polyarylate, polyurethane, polyamide, and polyetheramide, polyimide, polyetherimide, and polyamideimide. Polysulfonate resin such as, polysulfone, polysulfone resin such as polyethersulfone, polyetherketone resin such as polyetherketone, polyetheretherketone, organic resin film such as polyphenylene sulfide and modified polyphenylene oxide, cellulose fiber, polyester. Woven or non-woven substrates containing organic fibers such as fibers, aramid fibers, liquid crystal polymer fibers or inorganic fibers such as metal fibers and carbon fibers, films, sheets or plates of inorganic materials such as glass plates and metal foils. And a laminate of these.

Further, as the support, a composite such as glass fiber reinforced plastic (GFRP) can be used.
The support includes, for example, a woven fabric base material containing glass fibers or a non-woven fabric base material, a glass fiber composite, a glass base material containing a glass plate, a polyamide resin film, or a polyimide base material. A resin film can be used.

As the support, it is preferable to use one having a corona treatment on its surface or one provided with a primer layer because the adhesion between the support and the adhesive layer can be improved.

Further, as the support, a support having a communication port can be used. As the support having the communication port, various conventionally known supports can be used, and for example, paper, non-woven fabric, a porous film containing the plastic film and the like, a metal mesh, a punching film and the like can be used. Can be used. The communication port means one or more spatially continuous openings connecting the first surface and the second surface of the support.

As the support, it is preferable to use one having a thickness of 1 μm to 1500 μm, and more preferably one having a thickness of 12 μm to 10000 μm.

As the adhesive sheet, for example, it is preferable to use one having a thickness of the adhesive layer provided on one side of the support of 10 μm or more, and more preferably 20 μm to 200 μm. It is particularly preferable to use one having a size of 50 μm to 150 μm. By setting the thickness of the adhesive layer within the above range, it is possible to obtain an adhesive sheet having excellent cohesive force and exhibiting excellent adhesive strength.

As the adhesive sheet, for example, a sheet having a total thickness of 30 μm or more of the adhesive layers provided on both side surfaces of the support is preferably used, and more preferably in the range of 40 μm to 400 μm. It is more preferably in the range of 100 μm to 300 μm, and particularly preferably in the range of 120 μm to 250 μm. By setting the total thickness of the adhesive layers within the above range, it is possible to obtain an adhesive sheet having excellent cohesive force and exhibiting excellent adhesive strength.

In the pressure-sensitive adhesive sheet, a coating liquid (adhesive) containing the adhesive component is applied to the surface of the release liner in advance using a roll coater or the like, and dried to form a pressure-sensitive adhesive layer, and then the pressure-sensitive adhesive layer is formed. , The pressure-sensitive adhesive layer can be produced by a transfer method in which the pressure-sensitive adhesive layer is bonded to both sides of the support.

The form of the coating liquid (adhesive) includes solvent-based, emulsion-type adhesives, water-based adhesives such as water-soluble adhesives, hot-melt adhesives, UV-curable adhesives, EB-curable adhesives and the like without solvents. The system etc. can be mentioned.

As a method of imparting a predetermined center line average surface roughness Ra to the surface of the pressure-sensitive adhesive layer in contact with the adherend, the center average surface roughness of the release-treated surface of the release liner is preferably 0. .1 μm to 10.0 μm, more preferably 0.3 μm to 5.0 μm, more preferably 0.5 μm to 3.0 μm, more preferably 1.0 μm to 2.3 μm, still more preferably 1.5 μm to 2.2 μm. A method using a release liner within the range of is mentioned. Specifically, an adhesive layer is formed by applying the coating liquid (adhesive) to the release-treated surface of the release liner having the center average surface roughness in the above range and drying it. If necessary, a method of sticking to the surface of the support and removing the release liner can be mentioned.

By the above method, the center line surface roughness of the same level as, or slightly larger than the center average surface roughness of the release-treated surface is transferred to the surface of the adhesive layer.

Examples of the release liner include resin films such as polyethylene terephthalate, polyethylene, polypropylene, and ethylene-propylene copolymers, foam films, Japanese paper, Western paper, glassin paper and other papers, non-woven fabrics, metal foils, and combinations thereof. Among the laminated films, those whose mold release surface has the center line average surface roughness in the above range can be used.

The shape of the release-treated surface of the release liner can be imparted by sandblasting or the like on the surface of the film. Further, as the shape of the release-treated surface of the release liner, a film or the like obtained by molding a mixture of the resin and the mat material into a film can be used.

Pressure-sensitive adhesive sheet of the present invention, attached one pressure-sensitive adhesive sheet to an adherend, the process of manufacturing a laminate [1], 0.001 N the laminate and the other adherend ^/ cm ^{2 ~10N /} cm 2 After performing the step of contacting with a load in the range of [2], the step of separating the laminated body from the other adherend [3], and the steps [2] and [3] at least once, the step By performing the step [4] of crimping with a load more than twice the load applied in the step [3] after the [2], an article having a structure in which two or more adherends are adhered is manufactured. .. According to the above manufacturing method, the position can be adjusted while re-sticking, so that two or more adherends can be accurately stuck and fixed at a strictly specified position without any slight deviation. it can.

First, the step [1] will be described.
The step [1] can be performed in any temperature environment, but unlike the conventional thermoplastic adhesive sheet, it is not necessary to perform heating or the like, and it is preferable to perform the step [1] within the assumed working environment temperature. The temperature is preferably in the range of −5 ° C. to 40 ° C., and more preferably in the range of 0 ° C. to 35 ° C.

In the step [1], the time for crimping the adherend and the pressure-sensitive adhesive sheet may be arbitrarily set in the work step, but it is preferable to load the article for 1 second or longer in order to temporarily fix the article. On the other hand, since it is preferable that the loading time is not too long in order to improve the production efficiency of the article, the crimping time is preferably 1 second to 30 seconds, more preferably 3 seconds to 25 seconds. More preferably, it is 5 to 20 seconds.

Examples of the method of crimping the adherend to the pressure-sensitive adhesive sheet in the step [1] include a method using a commercially available press machine, acupressure, a pressure roller, and a weight having a predetermined load. Here, when a relatively thin rigid body (thin glass or the like) is used as the adherend, it is preferable to use the press machine. On the other hand, when the adhesive sheet is attached to the curved surface portion of the adherend, it is preferable to adopt a method of crimping with a finger or a method of crimping using a pressure jig having a shape matching the curved surface portion.

Next, the step [2] will be described.
The step [2] of the preceding paragraph is a step of bringing the surface of the laminated body on the adhesive sheet side and the other adherend into contact with each other with a load in the range of ^{0.001 N / cm 2 to} 10 N / cm ^2. More specifically, in the step [2], the surface of the laminate produced in the step [1] on the adhesive sheet side is placed on the other adherend in the range of ^{0.001 N / cm 2 to} 10 N / cm ^2. It is a process of loading with. If the load is within the above range, the sticking position can be adjusted while re-sticking without the other adherend and the adhesive sheet adhering to each other.

Load in the step [2] is preferably in the range of ^{0.001N / cm 2 ~10N / cm 2} , more preferably in the range of ^{0.1N / cm 2 ~7N / cm 2} , 0. more preferably in the range of ^{1N / cm 2 ~3N / cm 2} , particularly preferably in the range of ^{0.1N / cm 2 ~1.5N / cm 2} . By setting the load range, the sticking position can be adjusted while shifting the laminated body without the other adherend and the adhesive sheet adhering to each other.

The step [2] can be performed in an arbitrary temperature environment, but unlike the conventional thermoplastic adhesive sheet, it is not necessary to perform heating or the like, and it is preferable to perform the step [2] within the assumed working environment temperature. The temperature is preferably in the range of −5 ° C. to 40 ° C., and more preferably in the range of 0 ° C. to 35 ° C.

In the step [2], the time for contacting the adherend with the pressure-sensitive adhesive sheet with a load within the above range may be arbitrarily set in the work step.

Next, the step [3] will be described.
The step [3] of the preceding paragraph is a step of pulling the laminated body away from the other adherend.

In the step [3], the direction in which the laminated body is separated from the other adherend is not particularly specified, but the laminated body and the adhesive sheet are arranged in a direction perpendicular to the surface of the other adherend. It is preferable because it can be easily separated without being damaged.

The speed at which the laminate is separated from the other adherend in the step [3] is not particularly specified, but is preferably in the range of 1 m / min to 100 m / min, and preferably in the range of 1 m / min to 50 m / min. More preferred. By setting the speed within the above speed range, the laminate and the adhesive sheet can be easily separated without being damaged.

Although the step [3] can be performed in any temperature environment, it is preferably performed in the range of the assumed working environment temperature, specifically, it is preferably performed in the range of −5 ° C. to 40 ° C., 0. It is more preferable to carry out in the range of ° C. to 35 ° C.

Next, the step [4] will be described.
The step [4] is a method of fixing the laminated body and the other adherend by crimping with a load more than twice the load applied in the step [3].
The load in the step [4] is preferably 2.5 times or more, more preferably 5 times or more, still more preferably 10 times or more the load applied in the step [3]. It is particularly preferable that it is 20 times or more. Within the above range, the laminated body and the other adherend can be sufficiently brought into close contact with each other and fixed.

Preferably the step [4] load in is in the range of ^{5N / cm 2 ~500N / cm 2} , more preferably to a load in the range of ^{12N / cm 2 ~200N / cm 2} , 15N / cm 2 ~150N It is more preferable to load in the range of / cm ^2. By setting the load range, the other adherend and the adhesive sheet can be sufficiently adhered and fixed.

Although the step [4] can be performed in any temperature environment, it is not necessary to perform heating or the like unlike the conventional thermoplastic adhesive sheet, and it is preferable to perform the step [4] within the assumed working environment temperature. The temperature is preferably in the range of −5 ° C. to 40 ° C., and more preferably in the range of 0 ° C. to 35 ° C.

In the step [4], the time for crimping the adherend and the pressure-sensitive adhesive sheet may be arbitrarily set in the work step, but it is preferable to load the article for 1 second or longer in order to temporarily fix the article. On the other hand, since it is preferable that the loading time is not too long in order to improve the production efficiency of the article, the crimping time is preferably 1 second to 30 seconds, more preferably 3 seconds to 25 seconds. More preferably, it is 5 to 20 seconds.

Examples of the method of crimping the adherend to the pressure-sensitive adhesive sheet in the step [4] include a method using a commercially available press machine, acupressure, a pressure roller, and a weight having a predetermined load. Here, when a relatively thin rigid body (thin glass or the like) is used as the adherend, it is preferable to use the press machine. On the other hand, when the adhesive sheet is attached to the curved surface portion of the adherend, it is preferable to adopt a method of crimping with a finger or a method of crimping using a pressure jig having a shape matching the curved surface portion.

Further, in the step of attaching the adhesive sheet to one of the adherends to manufacture the laminate [1'], the surface of the laminate on the adhesive sheet side and the other adherend are 0.001 N / cm ^{2 to} 10 N. In the step of contacting with a load in the range of / cm ² [2'], the laminate is applied with a load in the range of ^{0.001 N / cm 2 to} 10 N / cm ^{2 along the surface of the other adherend.} By performing the shifting step [3'] and the step [4'] of crimping the laminated body and the other adherend with a load more than twice the load applied in the step [3'], 2 An article having a structure in which the above-mentioned adherends are adhered is manufactured. According to the above manufacturing method, the position of the laminated body of the adhesive sheet can be adjusted by shifting the laminated body while contacting the other adherend, so that two or more adherends are strictly specified without any slight deviation. It can be accurately attached to the position and adhered and fixed.

First, the step [1'] will be described.
The step [1'] can be performed in any temperature environment, but unlike the conventional thermoplastic adhesive sheet, it is not necessary to perform heating or the like, and it is preferable to perform the step [1'] within the assumed working environment temperature. Specifically, it is preferably carried out in the range of −5 ° C. to 40 ° C., and more preferably carried out in the range of 0 ° C. to 35 ° C.

In the step [1'], the time for crimping the adherend and the pressure-sensitive adhesive sheet may be arbitrarily set in the work step, but it is preferable to load the article for 1 second or longer in order to temporarily fix the article. On the other hand, since it is preferable that the loading time is not too long in order to improve the production efficiency of the article, the crimping time is preferably 1 second to 30 seconds, more preferably 3 seconds to 25 seconds. More preferably, it is 5 to 20 seconds.

Examples of the method of crimping the adherend to the pressure-sensitive adhesive sheet in the step [1'] include a method using a commercially available press machine, acupressure, a pressure roller, and a weight having a predetermined load. Here, when a relatively thin rigid body (thin glass or the like) is used as the adherend, it is preferable to use the press machine. On the other hand, when the adhesive sheet is attached to the curved surface portion of the adherend, it is preferable to adopt a method of crimping with a finger or a method of crimping using a pressure jig having a shape matching the curved surface portion.

Next, the step [2'] will be described.
The step [2'] in the preceding paragraph is a step of bringing the surface of the laminated body on the adhesive sheet side and the other adherend into contact with each other with a load in the range of ^{0.001 N / cm 2 to} 10 N / cm ^2.
More specifically, the step [2 '], the step [1'] of the pressure-sensitive adhesive sheet side surface of the laminate produced in the other adherend by 0.001N ^/ cm ² ~10N ^/ cm 2 It is a process of loading within the range of. If the load is within the above range, the sticking position can be adjusted while shifting the laminated body without the other adherend and the adhesive sheet adhering to each other.

Load in the step [2 '] is preferably in the range of ^{0.001N / cm 2 ~10N / cm 2} , more preferably in the range of ^{0.1N / cm 2 ~7N / cm 2} , 0 more preferably in the range of ^{.1N / cm 2 ~3N / cm 2} , particularly preferably in the range of ^{0.1N / cm 2 ~1.5N / cm 2} . By setting the load range, the sticking position can be adjusted while shifting the laminated body without the other adherend and the adhesive sheet adhering to each other.

The step [2'] can be performed in any temperature environment, but unlike the conventional thermoplastic adhesive sheet, it is not necessary to perform heating or the like, and it is preferable to perform the step [2'] within the assumed working environment temperature. Specifically, it is preferably carried out in the range of −5 ° C. to 40 ° C., and more preferably carried out in the range of 0 ° C. to 35 ° C.

In the step [2'], the time for contacting the adherend with the pressure-sensitive adhesive sheet with a load in the above range may be arbitrarily set in the work step.

Next, the step [3'] will be described.
The step [3'] in the preceding paragraph is a step of moving the laminated body along the surface of the other adherend while applying a load in the range of ^{0.001 N / cm 2 to} 10 N / cm ^2.

Preferably load applied in the step [3 '] is in the range of ^{0.001N / cm 2 ~10N / cm 2} , more preferably in the range of ^{0.1N / cm 2 ~7N / cm 2} , 0 more preferably in the range of ^{.1N / cm 2 ~3N / cm 2} , particularly preferably in the range of ^{0.1N / cm 2 ~1.5N / cm 2} . By setting the load range, when the sticking position is adjusted while shifting the laminated body, the position adjustment can be easily performed without the adhesive sheet and the other adhesive sheet adhering to each other at an unintended position.

The step [3'] can be performed in any temperature environment, but unlike the conventional thermoplastic adhesive sheet, it is not necessary to perform heating or the like, and it is preferable to perform the step [3'] within the expected working environment temperature. Specifically, it is preferably carried out in the range of −5 ° C. to 40 ° C., and more preferably in the range of 0 ° C. to 35 ° C.

In the step [3'], the time for contacting the adherend with the pressure-sensitive adhesive sheet with a load in the above range may be arbitrarily set in the work step.

Next, the step [4'] will be described.
The step [4'] is a method of fixing the laminated body and the other adherend by crimping with a load more than twice the load applied in the step [3'].
The load in the step [4'] is preferably 2.5 times or more, more preferably 5 times or more, still more preferably 10 times or more the load applied in the step [3']. It is particularly preferable that it is 20 times or more. Within the above range, the laminated body and the other adherend can be sufficiently brought into close contact with each other and fixed.

Preferably said load in step [4 '] in the range of ^{5N / cm 2 ~500N / cm 2} , but more preferably in the range of ^{12N / cm 2 ~200N / cm 2} , 15N / cm 2 ~150N / It is more preferably in the range of cm ^2. By setting the load range, the other adherend and the adhesive sheet can be sufficiently adhered and fixed.

The step [4'] can be performed in any temperature environment, but unlike the conventional thermoplastic adhesive sheet, it is not necessary to perform heating or the like, and it is preferable to perform the step [4'] within the assumed working environment temperature. Specifically, it is preferably carried out in the range of −5 ° C. to 40 ° C., and more preferably in the range of 0 ° C. to 35 ° C.

In the step [4'], the time for crimping the adherend and the pressure-sensitive adhesive sheet may be arbitrarily set in the work step, but it is preferable to load the article for 1 second or longer in order to temporarily fix the article. On the other hand, since it is preferable that the loading time is not too long in order to improve the production efficiency of the article, the crimping time is preferably 1 second to 30 seconds, more preferably 3 seconds to 25 seconds. More preferably, it is 5 to 20 seconds.

Examples of the method of crimping the adherend to the pressure-sensitive adhesive sheet in the step [4'] include a method using a commercially available press machine, acupressure, a pressure roller, and a weight having a predetermined load. Here, when a relatively thin rigid body (thin glass or the like) is used as the adherend, it is preferable to use the press machine. On the other hand, when the adhesive sheet is attached to the curved surface portion of the adherend, it is preferable to adopt a method of crimping with a finger or a method of crimping using a pressure jig having a shape matching the curved surface portion.

Examples of the adherend include glass, a metal such as aluminum, and a plastic made of a resin such as acrylic and polycarbonate.

In the method for producing an article of the present invention, a liquid adhesive may be used in combination with the adhesive sheet. When high bonding strength is required or when filling gaps with a large thickness difference, a liquid adhesive is used to fix the member instead of an adhesive sheet, but on the other hand, the liquid adhesive is fixed with a jig until it solidifies. The member must be held. Therefore, in the present manufacturing method, by combining the liquid adhesive and the adhesive sheet and using the adhesive sheet for temporary fixing, it is possible to eliminate the need for jig fixing and to adjust the sticking position.
The step of applying the liquid adhesive to the adherend may be after any of the steps [1'], [2'], [3'], and [4'], and even before the step [1']. Well, it can be selected arbitrarily according to workability.

In the method for manufacturing an article of the present invention, the adhesive sheet may be attached to the entire surface of the adherend, a part thereof, or continuously attached to the outer peripheral portion of the adherend in a frame shape. Also, there may be a part that is interrupted intermittently. Further, even when the adhesive sheet and the liquid adhesive are used together, the adhesive sheet can be attached in the same manner as described above, but the adhesive sheet is attached intermittently to the interrupted portion (the portion where the adhesive sheet is not attached). A liquid adhesive can be applied.
When the adhesive sheet and the liquid adhesive are used in combination, the sticking area of the adhesive sheet may be large, or the application area of the liquid adhesive may be large.

The method for manufacturing an article of the present invention can be used for fixing between flat surfaces, between curved surfaces, and between adherends between flat surfaces and curved surfaces, and among them, it is preferably used for fixing between adherends between curved surfaces. Can be done. Since it is more difficult to fix curved surfaces to a specific position than to fix flat surfaces, the method for manufacturing an article of the present invention, which can efficiently adjust the position, can be preferably used.

The curved surfaces may have the same radius of curvature or may have different radii of curvature. The radius of curvature is preferably in the range of 0.1 mm to 10 m, more preferably 0.3 mm to 500 mm, and even more preferably 0.5 mm to 100 mm.

Examples of the article obtained by the manufacturing method of the present invention include an in-vehicle display in which a decorative panel made of polycarbonate is joined to an image display device, a mobile terminal device in which a curved image display panel and a curved housing are joined, and the like. Can be mentioned.

Examples of the article obtained by the adhesive sheet of the present invention include an in-vehicle display in which a decorative panel made of polycarbonate is joined to an image display device, a mobile terminal device in which a curved image display panel and a curved housing are joined, and the like. Can be mentioned.

This will be specifically described below with reference to Examples.

(Preparation Example 1) Adhesive (a-1)
Styrene-butadiene block copolymer X having a weight average molecular weight of 300,000 (a mixture of a triblock copolymer and a diblock copolymer. The ratio of the diblock copolymer to the total amount of the mixture is 50% by mass. The mass ratio of polystyrene units to the total of the styrene-butadiene block copolymer is 30% by mass, the mass ratio of polybutadiene units is 70% by mass), 100 parts by mass, terpenphenol-based tackifier resin (softening point 115 ° C., number average molecular weight). 1000) 65 parts by mass, microcapsule manufactured by Matsumoto Yushi Seiyaku Co., Ltd. Matsumoto Microsphere MFL-HD30CA (average particle size 20-40 μm, true specific gravity 0.14) 10 parts by mass is mixed and dissolved in toluene. The adhesive (a-1) was obtained.

(Preparation Example 2) Adhesive (a-2)
44.9 parts by mass of butyl acrylate, 50 parts by mass of 2-ethylhexyl acrylate, 2 parts by mass of acrylic acid, 3 parts by mass of vinyl acetate in a reaction vessel equipped with a stirrer, a reflux cooler, a thermometer, a dropping funnel and a nitrogen gas inlet. , 4-Hydroxybutyl acrylate 0.1 part by mass and 2,2'-azobisisobutylnitrile 0.1 part by mass as a polymerization initiator are dissolved in 100 parts by mass of ethyl acetate and polymerized at 70 ° C. for 10 hours. , An acrylic copolymer Z solution having a weight average molecular weight of 800,000 was obtained.

Next, 30 parts by mass of the polymerized rosin ester-based tackifier resin D-135 (manufactured by Arakawa Chemical Industry Co., Ltd.) was added to 100 parts by mass of the acrylic copolymer Z, ethyl acetate was added and mixed, and then Japan. 1.1 parts by mass of "Coronate L-45" (isocyanate-based cross-linking agent, solid content 45% by mass) manufactured by Polyurethane Industry Co., Ltd. was added and stirred for 15 minutes to obtain an adhesive (a-2).

(Preparation Example 3) Adhesive (a-3)
Styrene-butadiene block copolymer X having a weight average molecular weight of 300,000 (a mixture of a triblock copolymer and a diblock copolymer. The ratio of the diblock copolymer to the total amount of the mixture is 50% by mass. The mass ratio of polystyrene units to the total of the styrene-butadiene block copolymer is 30% by mass, the mass ratio of polybutadiene units is 70% by mass), 100 parts by mass, terpenphenol-based tackifier resin (softening point 115 ° C., number average molecular weight). 1000) 65 parts by mass and 133 parts by mass of calcium carbonate B-200S (average particle size 5 μm, true specific gravity 2.7) manufactured by Shiraishi Calcium Co., Ltd. are mixed and dissolved in toluene to make an adhesive (a-3). Got

(Preparation Example 4) Adhesive (a-4)
Styrene-butadiene block copolymer X having a weight average molecular weight of 300,000 (a mixture of a triblock copolymer and a diblock copolymer. The ratio of the diblock copolymer to the total amount of the mixture is 50% by mass. The mass ratio of polystyrene units to the total of the styrene-butadiene block copolymer is 30% by mass, the mass ratio of polybutadiene units is 70% by mass), 100 parts by mass, terpenphenol-based tackifier resin (softening point 115 ° C., number average molecular weight). 1000) 65 parts by mass and 177 parts by mass of calcium carbonate B-200S (average particle size 5 μm, true specific gravity 2.7) manufactured by Shiraishi Calcium Co., Ltd. are mixed and dissolved in toluene to make an adhesive (a-4). Got

(Preparation Example 5) Adhesive (a-5)
Styrene-butadiene block copolymer X having a weight average molecular weight of 300,000 (a mixture of a triblock copolymer and a diblock copolymer. The ratio of the diblock copolymer to the total amount of the mixture is 50% by mass. The mass ratio of polystyrene units to the total of the styrene-butadiene block copolymer is 30% by mass, the mass ratio of polybutadiene units is 70% by mass), 100 parts by mass, terpenphenol-based tackifier resin (softening point 115 ° C., number average molecular weight). 1000) 30 parts by mass and 150 parts by mass of calcium carbonate B-200S (average particle size 5 μm, true specific gravity 2.7) manufactured by Shiraishi Calcium Co., Ltd. are mixed and dissolved in toluene to make an adhesive (a-5). Got

(Preparation Example 6) Adhesive (a-6)
Styrene-butadiene block copolymer X having a weight average molecular weight of 300,000 (a mixture of a triblock copolymer and a diblock copolymer. The ratio of the diblock copolymer to the total amount of the mixture is 50% by mass. The mass ratio of polystyrene units to the total of the styrene-butadiene block copolymer is 30% by mass, the mass ratio of polybutadiene units is 70% by mass), 100 parts by mass, terpenphenol-based tackifier resin (softening point 115 ° C., number average molecular weight). 1000) 65 parts by mass and 133 parts by mass of calcium carbonate B-300 (average particle size 8 μm, true specific gravity 2.7) manufactured by Shiraishi Calcium Co., Ltd. are mixed and dissolved in toluene to make an adhesive (a-6). Got

(Example 1)
The adhesive (a-1) is applied to the surface of a release liner having a center line average surface roughness Ra of 0.55 μm so that the thickness after drying becomes 100 μm using an applicator, and 5 at 85 ° C. The pressure-sensitive adhesive layer was formed by drying for a minute. The pressure-sensitive adhesive layer was bonded to both sides of a polyethylene-based foam base material having a thickness of 150 μm ^{, and then pressurized at 40 N / cm 2} for lamination to obtain a pressure-sensitive adhesive sheet.

(Example 2)
The adhesive (a-3) is applied to the surface of a release liner having a center line average surface roughness Ra of 0.55 μm so that the thickness after drying becomes 50 μm using an applicator, and 5 at 85 ° C. The pressure-sensitive adhesive layer was formed by drying for a minute. The pressure-sensitive adhesive layer was bonded to both sides of a polyethylene-based foam base material having a thickness of 300 μm ^{, and then pressurized at 40 N / cm 2} for lamination to obtain a pressure-sensitive adhesive sheet.

(Example 3)
An adhesive sheet was obtained in the same manner as in Example 2 except that the adhesive (a-4) was used instead of the adhesive (a-3).

(Example 4)
An adhesive sheet was obtained in the same manner as in Example 2 except that the adhesive (a-5) was used instead of the adhesive (a-4).

(Example 5)
An adhesive sheet was obtained in the same manner as in Example 2 except that the adhesive (a-6) was used instead of the adhesive (a-5).

(Example 6)
An adhesive sheet was obtained in the same manner as in Example 2 except that it was applied to the surface of a release liner having a center line average surface roughness Ra of 0.55 μm so that the thickness after drying was 100 μm.

(Example 7)
An adhesive sheet was obtained in the same manner as in Example 2 except that a polyethylene terephthalate film base material having a thickness of 50 μm was used instead of the polyethylene-based foam having a thickness of 300 μm.

(Example 8)
An adhesive sheet was obtained in the same manner as in Example 2 except that an aluminum foil base material having a thickness of 50 μm was used instead of the polyethylene-based foam having a thickness of 300 μm.

(Comparative Example 1)
The adhesive (a-2) is applied to the surface of a release liner having a center line average surface roughness Ra of 0.55 μm so that the thickness after drying becomes 100 μm using an applicator, and 5 at 85 ° C. The pressure-sensitive adhesive layer was formed by drying for a minute. The pressure-sensitive adhesive layer was bonded to both sides of a polyethylene-based foam base material having a thickness of 150 μm ^{, and then pressurized at 40 N / cm 2} for lamination to obtain a pressure-sensitive adhesive sheet.

[Mixed volume ratio of particles in the adhesive layer]
The volume of the particles blended in the adhesive used for producing the pressure-sensitive adhesive sheet obtained in the examples was calculated from the specific gravity and the blending amount of the particles, and the volume of the particles in the pressure-sensitive adhesive layer was divided by the total volume of the pressure-sensitive adhesive layer. The value multiplied by 100 was calculated as the compounding volume ratio of the particles to the pressure-sensitive adhesive layer.

[Dynamic viscoelasticity measurement of adhesive layer]
The adhesive used for producing the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples was applied to the surface of the release liner using an applicator so that the thickness after drying was 100 μm, and dried at 85 ° C. for 5 minutes. By doing so, a plurality of adhesive layers having a thickness of 100 μm were formed.
By superimposing the adhesive layers obtained above, test pieces made of an adhesive layer having a thickness of 2 mm were prepared.

A parallel plate with a diameter of 7.9 mm was attached to a viscoelasticity tester (Ares 2kSTD) manufactured by TA Instruments Japan. The test piece is sandwiched between the parallel plates with a compressive load of 40 to 60 g, and has a shear storage elastic modulus at 23 ° C. under the conditions of a frequency of 1 Hz, a temperature range of -60 to 150 ° C., and a heating rate of 2 ° C./min. G ₂₃ was measured.

[Method of measuring the average surface roughness Ra of the center line of the surface of the adhesive layer in contact with the adherend]
From the pressure-sensitive adhesive sheets obtained in the above Examples and Comparative Examples, the release liner laminated on the adhesive layer (A) constituting the present invention is peeled off, and the center line average surface roughness of the surface of the pressure-sensitive adhesive layer in contact with the adherend is removed. Ra was measured by the following method.

KEYENCE "Color 3D Laser Microscope VK-9500" (lens magnification 50 times, measurement mode: ultra-depth, pitch: 0. The surface was measured using 05 μm, optical zoom: 1.0 times), and the center line average surface roughness Ra was measured. The average value of the center line average surface roughness Ra of the three points obtained by the above measurement was taken as the center line average surface roughness Ra of the surface of the pressure-sensitive adhesive layer in contact with the adherend.

[Evaluation of re-pasting suitability]
Two test pieces (adhesive sheets) were prepared by cutting the adhesive sheet into strips having a width of 10 mm and a length of 120 mm.
Next, the test piece is attached in parallel to both ends of an aluminum plate having a thickness of 0.5 mm, a width of 70 mm, and a length of 150 mm in the length direction, and the test pieces are attached in parallel to both ends in the length direction. The test piece was placed on the upper surface of an acrylic plate having a length of 150 mm so that the test piece and the acrylic plate were in contact with each other (FIG. 1).

After 3 seconds had passed since the test piece was brought into contact with the acrylic plate, one end of the aluminum plate in the length direction (position 8 in FIG. 2) was peeled off at a speed of 30 m / min in the vertical direction. The test piece and the acrylic plate were loaded at ^{0.01 N / m 2} by the weight of the aluminum plate in the above 3 seconds.
The ease of peeling when the above peeling test was performed 10 times was evaluated according to the following criteria.

Whether or not the aluminum plate is bent is determined by placing the aluminum plate after the test on a glass plate having a smooth surface and visually observing from the side surface in a state where the aluminum plate and the glass plate are parallel to each other. If there was, it was judged that "the aluminum plate did not bend", and the aluminum plate and the glass plate were not parallel (specifically, a float occurred between the end of the aluminum plate and the glass plate). Was judged to be "the aluminum plate was bent".

〇: The aluminum plate could be peeled off without bending 8 to 10 times out of 10 tests.
〇 Δ: The aluminum plate could be peeled off without bending 5 to 7 times in 10 tests.
Δ: The aluminum plate could be peeled off without bending 1 to 4 times in 10 tests.
X: The aluminum plate could not be peeled off without bending.

[Evaluation of shift suitability]
One test piece (adhesive sheet) was prepared by cutting the adhesive sheet prepared in Examples and Comparative Examples into a square shape of 10 mm × 10 mm. The release liner on one side of the test piece is peeled off, and a load of ^{50 N / cm 2} is applied to a square shape having a length of 15 mm and a width of 15 mm and a transparent acrylic plate having a thickness of 1 mm and a weight of 0.5 g using a press machine. After applying for a second, the pressurized state was released. Next, the release liner on one side of the test piece was peeled off, and the test piece was placed on a rectangular shape having a length of 150 mm and a width of 70 mm and a transparent acrylic plate having a thickness of 1 mm so that the adhesive surface was in contact with the transparent acrylic plate.
As shown in FIG. 2, the position adjustability was evaluated by moving the acrylic plate and the adhesive sheet horizontally with respect to the lower acrylic plate by 20 mm at a speed of 5 m / min with the index finger.
The above placement test was performed 10 times and evaluated according to the following criteria.

◯: The adhesive sheet could be shifted without getting caught on the acrylic plate.
Δ: The adhesive sheet was caught on the acrylic plate but could be displaced.
X: The adhesive sheet adhered to the acrylic plate and could not be displaced.

[Evaluation of adhesive strength]
In an environment of 23 ° C., the adhesive sheet used in Examples and Comparative Examples was cut into a square having a side (outer shape) of 14 mm and a width of 2 mm.
The cut adhesive sheet was attached to a transparent acrylic plate which is a rectangular parallelepiped having a length of 15 mm, a width of 15 mm, and a thickness of 2 mm. At that time, the test piece 1 was formed by sticking one side of the cut adhesive sheet so as to correspond to one side of the transparent acrylic plate of 15 mm.

Next, the stainless steel plate (SUS304) having a hole with a diameter of 10 mm at the center, a length of 20 mm, a width of 50 mm, and a thickness of 1 mm, and the surface of the test piece 1 on the adhesive sheet side are aligned with each other. ^{The test piece 2 was prepared by sticking and pressurizing at 50 N / cm 2} for 10 seconds using a press machine, releasing the pressurized state, and allowing the test piece 2 to stand in an environment of 23 ° C. for 1 hour.

Next, a tensile tester (A & D Tencilon RTA-100, compression mode) equipped with a stainless steel probe having a diameter of 8 mm was prepared. When the probe applied a force to the test piece 1 constituting the test piece 2 through the hole of the stainless plate (SUS304) constituting the test piece 2, the test piece 1 was peeled off from the stainless steel plate. The intensity at hour (N / cm ² ) was measured at 23 ° C. (see FIG. 3). The speed at which the probe pushes the test piece 1 was set to 10 mm / min.

1 Aluminum plate 2 Cut adhesive sheet 3 Acrylic plate 4 Peeling position 5 Acrylic plate 6 Cut adhesive sheet 7 Acrylic plate 8 Acrylic plate 9 Cut adhesive sheet 10 SUS plate 11 Probe

Claims (6)

An article having a structure in which two or more adherends are adhered by a double-sided adhesive sheet having an adhesive layer having a thickness of 50 μm to 200 μm containing particles having an average particle diameter of 0.1 to 40 μm on at least one surface. In the manufacturing method, a step of sticking a double-sided adhesive sheet to one adherend to manufacture a laminate [1'], the surface of the laminate on the double-sided adhesive sheet side and the other adherend are 0. In the step of contacting with a load in the range of 001 N / cm ^{2 to} 10 N / cm ² [2'], the other adherend is adhered while applying a load in the range of ^{0.001 N / cm 2 to} 10 N / cm ^2. step shifting along the surface of the body [3 '], and, step 4 for crimping said layered body and the other adherend at a load of ^{5N / cm 2 ~500N / cm 2} ' has, the method of making an article shear storage modulus _{G 23} at frequency 1Hz and 23 ° C. of the pressure-sensitive adhesive layer is characterized in that it is a ^{1.3 × 10 6 Pa~6 × 10 6} Pa. The method for producing an article according to claim 1, wherein the content of the particles in the pressure-sensitive adhesive layer is 1.0 to 250% by mass. The method for producing an article according to claim 1 or 2 , wherein the compounding volume ratio of the particles to the pressure-sensitive adhesive layer is 1.0 to 500%. The method for producing an article according to any one of claims 1 to 3 , wherein the center line average surface roughness Ra of the surface of the pressure-sensitive adhesive layer in contact with the adherend is 0.1 μm to 10.0 μm. The method for manufacturing an article according to any one of claims 1 to 4 , wherein the radius of curvature of the surface of one adherend and the surface of the other adherend is 0.1 mm to 10 m. An electronic device having a configuration in which two or more adherends are adhered by a double-sided adhesive sheet having an adhesive layer having a thickness of 50 μm to 200 μm containing particles having an average particle diameter of 0.1 to 40 μm on at least one surface. In the step of manufacturing a laminated body by attaching a double-sided adhesive sheet to one of the adherends [1'], the surface of the laminated body on the double-sided adhesive sheet side and the other adherend are set to 0. .001N ^/ cm ² ~10N ^/ cm 2 in the range step of contacting at a load of [2 '], while applying a load in the range of the laminate of ^{0.001N / cm 2 ~10N / cm 2} , the said other step shifting along the surface of the adherend [3 '], and, step 4 for crimping said layered body and the other adherend at a load of ^{5N / cm 2 ~500N / cm 2} ' has, method of manufacturing an electronic device, wherein the shear storage modulus _{G 23} at frequency 1Hz and 23 ° C. of the pressure-sensitive adhesive layer is ^{1.3 × 10 6 Pa~6 × 10 6} Pa.

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