WO2023191017A1 - センサパッケージ、センサパッケージの取付方法、センサパッケージ及び硬化剤を含むセット、並びに接着構造体 - Google Patents
センサパッケージ、センサパッケージの取付方法、センサパッケージ及び硬化剤を含むセット、並びに接着構造体 Download PDFInfo
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- WO2023191017A1 WO2023191017A1 PCT/JP2023/013444 JP2023013444W WO2023191017A1 WO 2023191017 A1 WO2023191017 A1 WO 2023191017A1 JP 2023013444 W JP2023013444 W JP 2023013444W WO 2023191017 A1 WO2023191017 A1 WO 2023191017A1
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- adhesive layer
- sensor package
- base material
- adhesive
- resin
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02209—Mounting means, e.g. adhesives, casings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
- B32B17/04—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments bonded with or embedded in a plastic substance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/04—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving separate application of adhesive ingredients to the different surfaces to be joined
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/30—Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/712—Weather resistant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2463/00—Presence of epoxy resin
Definitions
- the present invention relates to a sensor package, a method for attaching a sensor package, a set including a sensor package and a curing agent, and an adhesive structure including a sensor package.
- sensors have been used that are installed on a target object to measure physical changes such as vibration and distortion of the target object and various information.
- Patent Document 1 describes a first base material, an FBG sensor, a resin part and a first adhesive layer located on the first base material, and an opposite side of the first base material in the resin part.
- a sensor package is disclosed in which the FBG sensor is held by a resin part and has an adhesive layer located on the side surface, and the sensor package can be attached to an object without significantly reducing the sensitivity of the sensor. It is stated that it has excellent properties.
- the FBG sensor detects information about the target object via the resin part and the adhesive layer.
- some of the resins used for the resin portion in Patent Document 1 have an elastic modulus of a predetermined value or more, and stress relaxation occurs due to curing shrinkage and aging.
- Such changes in the resin portion affect the FBG sensor, and a wavelength shift of the peak wavelength in the wavelength spectrum measured by the interrogator occurs before and after the sensor package is manufactured, and with time after manufacturing. This means that the initial value of the detection system using the FBG sensor varies.
- an object of the present invention is to provide a sensor package that is capable of highly accurate sensing and has excellent workability during installation. Another objective is to provide a highly durable sensor package that can be used outdoors.
- the present inventors found that in a sensor package that includes an adhesive layer, a resin part, and an adhesive layer on the opposite side of the resin part to the base material on a base material, It has been found that the above problem can be solved by providing the FBG sensor part in contact with the resin part and held by the adhesive layer.
- the present invention has the following configurations [1] to [17].
- a sensor package affixed to a target object comprising: a resin part located on the first base material; a first adhesive layer located on the first base material and for attaching the first base material to the target object; an adhesive layer located on the opposite side of the first base material in the resin part,
- the FBG sensor section in the optical fiber is in contact with the resin section and is held by the adhesive layer.
- sensor package [2] The sensor package according to item [1], wherein the resin portion has adhesiveness.
- the adhesive layer in the sensor package is cured with a curing agent, applying the curing agent to at least one of the adhesive layer and the target object; attaching the sensor package to the object via the adhesive layer; How to install the sensor package, including: [14] The method for attaching the sensor package according to any one of [1] to [12] above, The adhesive layer in the sensor package is cured with a curing agent, applying the curing agent to the adhesive layer; applying the curing agent to the object; a step of attaching the sensor package to the object so that the curing agent applied to the adhesive layer and the curing agent applied to the object are in contact with each other. How to install.
- a sensor package attachment method for attaching the sensor package according to any one of [1] to [5] to the target object comprising: In the sensor package, surfaces of the first adhesive layer and the adhesive layer on the side to be attached to the target object are protected by a first release liner, The sensor package includes the first base material, a second adhesive layer, and a second adhesive layer on a surface opposite to the surface of the first adhesive layer that is attached to the target object.
- a second release liner is provided in a portion between the first base material and the second adhesive layer, Peeling off the first release liner and applying a curing agent to the adhesive layer; affixing a release surface of the sensor package from which the first release liner has been removed to the target object;
- a method for attaching a sensor package comprising the steps of: peeling off the second release liner, and attaching a release surface of the second adhesive layer from which the second release liner has been peeled off to the first base material.
- the FBG sensor section in the optical fiber is in contact with the resin section and is held by the hardened layer.
- the sensor package according to one aspect of the present invention is capable of highly accurate sensing, can be easily installed and positioned, and has excellent workability. In addition, it has excellent durability and can be used outdoors.
- FIG. 1 is a schematic diagram of one configuration example of a sensor package.
- FIG. 2 is a schematic cross-sectional view taken along line II in FIG.
- FIG. 3 is a schematic cross-sectional view taken along line II-II in FIG.
- FIG. 4 is a schematic cross-sectional view taken along line III-III in FIG.
- FIG. 5 is a schematic cross-sectional view of one configuration example of the sensor package.
- FIG. 6 is a schematic cross-sectional view of one configuration example of the sensor package.
- FIG. 7 is a schematic cross-sectional view of one configuration example of the sensor package.
- FIGS. 8A and 8B are schematic cross-sectional views of one configuration example of a sensor package.
- FIG. 9 is a schematic cross-sectional view of one configuration example of the sensor package.
- FIG. 10 is a schematic cross-sectional view of one configuration example of the adhesive structure.
- the range “A to B” means “A or more and B or less”.
- weight and “mass”, “% by weight” and “% by mass”, and “parts by weight” and “parts by mass” are treated as synonyms, respectively.
- the term “adhesive” refers to an adhesive that exhibits peeling resistance without solidifying.
- adhesives are also referred to as pressure-sensitive adhesives, which exhibit a soft solid (viscoelastic) state in a temperature range around room temperature, and easily adhere to adherends under pressure.
- the adhesive herein generally has a complex tensile modulus E * as defined in "C.A. Dahlquist, "Adhesion: Fundamentals and Practice", McLaren & Sons, (1966) P.143"(1Hz) ⁇ 10 7 dyne/cm 2 (typically, a material having the above properties at 25° C.).
- the "adhesive layer” refers to a layer formed of an adhesive.
- “adhesiveness” means the above-mentioned characteristic that an adhesive has.
- adheresive refers to a material that has the function of the above-mentioned adhesive and increases peel resistance when cured.
- adheresive layer refers to a layer formed of an adhesive.
- a sensor package includes a first base material and an optical fiber having an FBG sensor section disposed on the first base material, and is attached to a target object. And, a resin part located on the first base material; a first adhesive layer located on the first base material and for attaching the first base material to the target object; an adhesive layer located on the opposite side of the first base material in the resin part, The FBG sensor section in the optical fiber is in contact with the resin section and is held by the adhesive layer.
- the FBG sensor portion is held by an adhesive layer, and is attached to a target object via the adhesive layer.
- the FBG sensor section can detect information on the object only through the adhesive layer without using the first adhesive layer or the resin section, sensing accuracy can be improved. can.
- the FBG sensor part and the target object can be bonded more firmly, and the detection accuracy can be further improved.
- FIG. 1 is a schematic diagram of a configuration example of a sensor package 100 according to a first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view taken along line II in FIG.
- FIG. 3 is a schematic cross-sectional view taken along line II-II in FIG.
- FIG. 4 is a schematic cross-sectional view taken along line III-III in FIG.
- the sensor package 100 shown in FIGS. 1 to 4 includes a first base material 20, an optical fiber 15 having an FBG (Fiber Bragg Grating) sensor section 10 disposed on the first base material, and a first base material a first adhesive layer 11 located on the first base material 20 for pasting the first base material to an object;
- the FBG sensor part 10 is in contact with the resin part 12 and is held by the adhesive layer 14 .
- the FBG sensor part 10 is in contact with the resin part and is held by the adhesive layer 14, and the FBG sensor part 10 is not completely embedded in the resin part, so that the resin part 12 does not harden.
- the effect of shrinkage is small, and the effect on detection accuracy using the FBG sensor is also small.
- the FBG sensor section 10 is held by the adhesive layer 14, when the module is installed on the target object, the FBG sensor section and the target object are more firmly bonded by curing of the adhesive layer. It is possible to further improve the detection accuracy.
- the sensor package 100 at least a portion of the entire periphery of the resin portion 12 in contact with the FBG sensor portion 10, excluding the surface on the adhesive layer side, may be covered with the first adhesive layer 11.
- the surface on which the adhesive layer 14 is provided is the surface to be attached to the object.
- the FBG sensor section 10 is formed by carving a periodic diffraction grating into the core of the optical fiber 15, and the detection signal of the FBG sensor section 10 is output to the outside of the sensor package 100.
- the optical fiber 15 may be coated with a coating material 13.
- the elastic modulus of the coating material 13 is high in order to prevent signals from the target object from being relaxed by the coating material and improve detection accuracy of the FBG sensor.
- a material with a modulus of elasticity is used. Specific materials will be described later.
- the covering material 13 may be a single layer or multiple layers.
- a coating layer with a high elastic modulus can be provided, and another coating layer can be further provided outside the coating layer. Since the durability is improved by providing another coating layer, it can also be suitably used outdoors.
- the coating material 13 is not provided at the portion where the optical fiber 15 contacts the adhesive layer 14.
- the outer diameter of the optical fiber is preferably 0.125 mm to 1 mm.
- the thickness of the coating material 13 that covers the optical fiber 15 is not particularly limited, and is usually 10 ⁇ m to 1 mm.
- an optical fiber having an outer diameter of 0.125 mm to 1 mm can be coated with a resin coating material, and the outer diameter of the coating material including the optical fiber can preferably be 0.145 mm to 3 mm.
- the thickness of the covering material 13 at the portion in contact with the adhesive layer 14 is preferably 0.5 mm or less, more preferably 0.2 mm or less, and 0.5 mm or less. More preferably, the diameter is 0.05 mm or less.
- the first adhesive layer 11 is provided on the first base material.
- the first adhesive layer 11 when installing the sensor package on the target object, it is possible to temporarily fix the sensor package with the first adhesive layer 11 and firmly adhere it by curing the adhesive layer. Excellent workability.
- the first adhesive layer 11 eliminates the gap between the sensor package 100 and the target object and prevents outside air and moisture from entering the FBG sensor section 10, resulting in a highly durable sensor package. be able to.
- the first adhesive layer covers at least a portion of the entire periphery of the resin portion excluding the surface on the side to be attached to the object.
- the first adhesive layer 11 may be formed of multiple adhesive layers.
- the first adhesive layer 11 may be provided with a notch at a position corresponding to the coating material 13 depending on its thickness. By providing the notch, the sensor package can be attached to the target object with almost no gap between the first adhesive layer 11 and the target object, thereby preventing outside air and moisture from entering the FBG sensor section 10. Excellent protection and durability.
- the maximum diameter of the sheathing material 13 (the outer diameter of the sheathing material 13 including the optical fiber 15) is smaller than the thickness of the first adhesive layer 11, a notch is not necessarily provided in the first adhesive layer 11. This is not necessary, and the covering material 13 is buried in the first adhesive layer 11, which prevents outside air and moisture from entering and provides excellent durability.
- the thickness of the first adhesive layer 11 is preferably the same as or larger than the maximum diameter (outer diameter) of the coating material 13.
- the first adhesive layer 11 may have an opening (hereinafter sometimes simply referred to as an opening) that penetrates in the thickness direction.
- the FBG sensor part 10 When the resin part 12 is provided in the opening and the FBG sensor part 10 is arranged so as to be in contact with the resin part 12 and to be held by the adhesive layer 14, the FBG sensor and the first adhesive layer The objects do not come into contact with each other, making it easier to obtain accurate information about the object.
- the first adhesive layer 11 has an opening that penetrates in the thickness direction, and that the resin portion 12 is provided within the opening.
- the FBG sensor section 10 is held by the adhesive layer 14 because the FBG sensor section 10 in contact with the adhesive layer 14 is held by the adhesive layer 14 due to the adhesiveness of the adhesive layer 14. means fixed to layer 14.
- the position of the FBG sensor can be visually confirmed, making positioning easier during installation work.
- the shape of the opening there is no particular limitation on the shape of the opening, and it may be circular, elliptical, polygonal, square, or rectangular.
- the resin part 12 is located on the first base material and is in contact with the FBG sensor part 10.
- At least a portion of the entire periphery of the resin portion 12 excluding the surface on the side to be attached to the target object may be covered with the first adhesive layer 11.
- the resin portion 12 is provided within the opening.
- the surface of the resin section 12 opposite to the first base material, and the surface of the first adhesive layer 11 opposite to the first base material is formed so as to be flush with each other.
- the resin part 12 and the first adhesive layer 11 are located on the first base material 20, and the sensor package 100 is attached to the adhesive layer located on the opposite side of the resin part 12 from the first base material 20.
- An adhesive layer 14 is provided.
- the FBG sensor part 10 is protected by the resin part 12 and the adhesive layer 14 so as not to be exposed to the outside air.
- the adhesive layer 14 is installed so that it is attached to the object through the adhesive layer 14 when the sensor package 100 is attached to the object. I can do it.
- the FBG sensor section 10 held by the adhesive layer 14 is attached to an object via the adhesive layer 14. That is, the FBG sensor section 10 detects information on the object through the adhesive layer 14 instead of through the first adhesive layer 11 and the resin section 12, and the detection accuracy can be improved. can.
- FIG. 5 is a schematic cross-sectional view of a sensor package 200 according to the second embodiment of the present invention, and is a cross-sectional view corresponding to the cross-sectional view of the sensor package 100 shown in FIG. 4.
- the sensor package 200 shown in FIG. 5 is a modification of the sensor package 100 shown in FIG. An embodiment will be shown in which the adhesive layer is located closer to the adhesive layer 14.
- the FBG sensor section 10 is disposed within the opening of the first adhesive layer, whereas in the sensor package 200, the FBG sensor section 10 is disposed above the opening.
- the FBG sensor section 10 is arranged at a position protruding into the region opposite to the first base material side.
- the FBG sensor section 10 may be protected by the resin section 12 and the adhesive layer 14, or a portion thereof may protrude from the adhesive layer 14 and be exposed, as shown in FIG. . In the latter case, it is preferable that the sensor package is protected by a first release liner, which will be described later, until it is attached to the object.
- the FBG sensor section 10 is placed closer to the target object, since information on the target object can be detected with higher accuracy.
- FIG. 6 is a schematic cross-sectional view of one configuration example of a sensor package according to the third embodiment of the present invention, and is a cross-sectional view corresponding to the cross-sectional view of the sensor package 100 shown in FIG. 2.
- the surfaces of the first adhesive layer 11 and the adhesive layer 14 on the side to be attached to the object are protected by a first release liner. Good too.
- the sensor package 300a includes a second adhesive layer 16 and a second adhesive layer 16 on the surface of the first base material 20 opposite to the first adhesive layer 11 side.
- the base material 17 may be provided in this order.
- the sensor package 300a may include a second release liner 19 in a portion between the first base material 20 and the second adhesive layer 16.
- the second release liner 19 By providing the second release liner 19 in a part between the first base material 20 and the second adhesive layer 16, the second base material 17 can be attached to the first base material 20 at any timing. It becomes possible to stack them. After attaching the sensor package 300a to the target object, the second release liner 19 is peeled off and the second base material 17 is laminated on the first base material 20. It is easy to position, and has excellent workability.
- the second release liner 19 can also be provided with a back split.
- the back split portion is formed by cutting a line on the surface of the second release liner 19 opposite to the surface that contacts the adhesive layer.
- the shape of the cut line may be linear, curved, for example, wavy, or a combination thereof. Further, the broken line may be a solid line, a broken line, or a combination thereof.
- the sensor package 300a includes a second release liner 19 in a part between the first base material 20 and the second adhesive layer 16, and the second release liner 19 is connected to the second release liner 19.
- the release liner 19 may have an extending portion extending further and exposed than the second adhesive layer 16 in the direction in which the surface of the release liner 19 extends. If the second release liner 19 has an extending portion, the extending portion serves as a gripping portion, and a sensor package with excellent workability can be obtained.
- the shape of the extending portion is not particularly limited, and any appropriate shape may be adopted depending on the purpose.
- Specific examples of the visual shape of the extending portion include a rectangular shape (including a trapezoid), a semi-elliptical shape, and the like.
- the end portion of the extending portion may be wave-shaped or the like.
- the length of the extending portion in the peeling direction is preferably 1 mm to 30 mm, more preferably 5 mm to 20 mm. If the length of the extending portion in the peeling direction is within such a range, a sensor package with excellent peeling operability and good workability can be obtained.
- the sensor package according to the third embodiment of the present invention may be a sensor package 300a in which the extension part of the second release liner 19 is not provided, as in a sensor package 300b shown in FIG. . That is, the second release liner 19 may be provided in a portion between the first base material 20 and the second adhesive layer 16. The second release liner 19 is not provided with an extending portion.
- a portion of the tip may be folded into the first base material 20 side to provide the tab 19c.
- the tab 19c lifts up, so the tab 19c becomes a gripping part and the second release liner 19 is lifted up in the peeling direction.
- the release liner 19 can be easily peeled off from the second adhesive layer 16. Note that in the sensor package 300c shown in FIGS. 8(a) and 8(b), the second release liner is not provided with the extending portion shown in FIG. 6, but this embodiment is also provided with the extending portion. It's okay.
- a method for manufacturing a sensor package according to an embodiment of the present invention includes: (I) providing the first adhesive layer 11 on the first base material 20; (II) providing the resin portion 12 on the first base material 20; (III) a step of providing an optical fiber 15 so that the FBG sensor section 10 is placed on the first base material 20; (IV) A step of providing an adhesive layer 14 on the surface of the resin portion 12 opposite to the first base material 20 is included. The above steps (I) to (IV) are performed so that the FBG sensor section 10 is in contact with the resin section 12 and held by the adhesive layer 14 in the resulting sensor package.
- the first adhesive layer 11 may be directly formed on the first base material by applying and curing an adhesive composition, or the first adhesive layer 11 may be formed directly on the first base material by applying and curing an adhesive composition. Layers may be applied.
- the step of providing the first adhesive layer 11 may be performed in multiple steps.
- the first adhesive layer 11 can also be provided with a cutout at a position corresponding to the coating material 13.
- the resin part 12 is formed by filling the opening with a resin composition forming the resin part 12 and curing it, or by placing an adhesive such as an adhesive sheet in the opening. By doing so, it can be provided.
- the FBG sensor section 10 is located within or above the opening of the first adhesive layer 11, as shown in FIG. 4 or 5. It can be arranged so as to protrude into a region on the opposite side to the first base material side.
- the FBG sensor part 10 is arranged so as to be in contact with the resin part 12 provided in the opening of the first adhesive layer 11, as shown in FIG. 4 or 5. can be placed.
- the method for manufacturing a sensor package may include the above steps (I) to (III) in this order, or the order may be reversed.
- the resin part 12 made of an adhesive sheet and the FBG sensor part 10 are placed on the first base material 20 in this order in advance, and at least the entire periphery of the resin part 12 excluding the side to be pasted to the object is A portion may be covered with the first adhesive layer 11.
- the FBG sensor portion 10 may be provided, and then the resin portion may be provided by filling and curing the resin composition. good.
- the steps of providing the first adhesive layer 11, the resin portion 12, and the optical fiber 15 with the FBG sensor portion 10 on the first base material 20 can be performed at the same time.
- the FBG sensor part 10 is placed on an arbitrary release film 30, and the first adhesive layer 11 is further arranged so that the opening is located on the FBG sensor part 10, and the first adhesive layer A resin portion 12 is formed in the opening of 11.
- the first base material 20 is laminated on the side opposite to the release film 30 side of the first adhesive layer 11, and the release film 30 is peeled off, thereby depositing the first base material 20 on the first base material 20.
- the adhesive layer 11, the resin part 12, and the FBG sensor part 10 in contact with the resin part 12 can be provided at the same time.
- the adhesive layer 14 can be provided on the surface of the resin portion 12 opposite to the first base material 20.
- the adhesive layer 14 may be directly formed by applying and curing an adhesive composition, or a pre-formed adhesive layer 14 may be attached to the resin portion 12.
- the step of providing the adhesive layer 14 can be performed after placing the FBG sensor part 10 in contact with the resin part 12, and may also be performed after placing the resin part 12 on the first base material 20. It may be performed before placing the resin part 12 on the first base material 20.
- the method for manufacturing a sensor package may include steps other than the above steps (I) to (IV).
- the method may include a step of attaching a first release liner 18 to the surface of the first adhesive layer and the adhesive layer on the side to be attached to the object.
- the method also includes the step of providing a second adhesive layer 16 and a second base material 17 on the surface of the first base material 20 opposite to the surface on the first adhesive layer 11 side. Good too. Furthermore, the step of providing a second release liner 19 in a portion between the first base material 20 and the second adhesive layer 16 may be included.
- a second release liner 19 is laminated on a part of the first base material 20 on the side opposite to the first adhesive layer 11 side, and the second release liner 19 is laminated on the first base material 20 and the second release liner.
- a second adhesive layer 16 and a second base material 17 can be provided.
- the second adhesive layer 16 and the second base material 17 may be formed by applying and curing the material forming the second adhesive layer 16 or the second base material 17, or may be formed in advance. may be attached.
- the second base material may be a weather-resistant base material.
- the sensor package attachment method of this embodiment includes the step of attaching the sensor package to a target object. Before the adhesive layer is cured, the object and the sensor package are adhered to each other by the adhesive layer and the first adhesive layer.
- the target object and the FGB sensor held by the adhesive layer are adhered by the adhesive layer, and the adhesive layer adheres to the target object and the FGB sensor held by the adhesive layer.
- the object and the FBG sensor are firmly bonded. Therefore, the FBG sensor can detect the signal of the target object only through the adhesive layer without using the first adhesive layer or the resin part, which improves the detection accuracy of the sensor. can.
- the adhesive layer in the sensor package is preferably cured with a curing agent.
- a step of bringing the adhesive layer into contact with the hardening agent is required.
- the adhesive layer reacts upon contact with the curing agent.
- the step of bringing the adhesive layer into contact with the curing agent includes the step of applying the curing agent to at least one of the adhesive layer and the object, and the step of bringing the sensor package into contact with the object through the adhesive layer. It may also include a step of pasting it on the object.
- the sensor package mounting method is the above-described sensor package mounting method
- the adhesive layer in the sensor package is cured with a curing agent, applying the curing agent to at least one of the adhesive layer and the target object;
- the method includes a step of attaching the sensor package to the object via the adhesive layer.
- the step of bringing the adhesive layer into contact with the curing agent may include the steps of applying the curing agent to the adhesive layer and attaching the sensor package to the object.
- the method may include the steps of applying a hardening agent to the object and attaching the sensor package to the object so that the adhesive layer and the applied hardening agent come into contact with each other.
- the step of bringing the adhesive layer into contact with the hardening agent includes a step of applying the hardening agent to the adhesive layer, a step of applying the hardening agent to the object, and a step of bringing the sensor package into contact with the object.
- the method may include a step of attaching the hardening agent applied to the adhesive layer to the object so that the hardening agent applied to the object comes into contact with the hardening agent applied to the adhesive layer.
- the sensor package mounting method is the above-described sensor package mounting method
- the adhesive layer in the sensor package is cured with a curing agent, applying the curing agent to the adhesive layer; applying the curing agent to the object;
- the method includes the step of attaching the sensor package to the target object so that the hardening agent applied to the adhesive layer and the hardening agent applied to the target object are in contact with each other.
- the adhesive layer and the curing agent may be heated, and the heating temperature is, for example, preferably 50°C or higher, more preferably 70°C or higher, and, for example, preferably 130°C.
- the temperature below is more preferably 110°C or below.
- the reaction temperature is preferably room temperature.
- Room temperature is a temperature at which the above-mentioned heating (for example, heating at 50°C or higher) is not performed to cause the adhesive layer and the curing agent to react, and is, for example, lower than 50°C, preferably 40°C or lower, Further, the temperature is, for example, 10°C or higher, preferably 20°C or higher. If the reaction temperature is room temperature, there is no need for heating to cause the adhesive layer and the curing agent to react, and the sensor package can be more easily adhered to the object, resulting in excellent workability.
- the reaction time is, for example, 30 minutes or more, preferably 12 hours or more, and, for example, 96 hours or less, preferably 48 hours or less.
- the adhesive layer is cured to form a cured layer.
- the adhesive layer is cured at room temperature.
- the hardened layer allows the target object and the FBG sensor to be firmly adhered to each other, thereby improving the detection accuracy of the FBG sensor.
- the shear adhesive strength of the cured layer is, for example, 0.1 MPa or more, preferably 0.4 MPa or more, more preferably 0.6 MPa or more, even more preferably 0.7 MPa or more, particularly preferably 1.0 MPa or more, More preferably, it is 2.3 MPa or more, still more preferably 2.5 MPa or more, and still more preferably 3.5 MPa or more. If the shear adhesive force of the cured layer is equal to or higher than the above lower limit, the adhesive layer has excellent adhesive properties and can reliably bond the object and the FBG sensor.
- the shear adhesive strength of the cured layer is measured by the following method. That is, the adhesive layer is sandwiched between two release-treated polyethylene terephthalate films, one polyethylene terephthalate film is peeled from the adhesive layer, and the peeled adhesive layer is placed on the first slate board. and then peel off the other polyethylene terephthalate film from the adhesive layer. Separately, a hardening agent is placed on the second slate plate. Next, the adhesive layer and the hardening agent are brought into contact with each other so that they are sandwiched between the first slate board and the second slate board, and left to stand for 24 hours to form a hardened layer. Then, the second slate plate is pulled in the shearing direction at a speed of 5 mm/min, and the strength when the two slate plates are peeled off is determined as the shear adhesive strength.
- the method of attaching the sensor package of other embodiments is as follows: In the sensor package, surfaces of the first adhesive layer and the adhesive layer on the side to be attached to the target object are protected by a first release liner, The sensor package includes the first base material, a second adhesive layer, and a second adhesive layer on a surface opposite to the surface of the first adhesive layer that is attached to the target object.
- a second release liner is provided in a portion between the first base material and the second adhesive layer, Peeling off the first release liner and bringing a curing agent into contact with the adhesive layer; affixing a release surface of the sensor package from which the first release liner has been removed to the target object; The step of peeling off the second release liner and attaching the release surface of the second adhesive layer from which the second release liner has been peeled off to the first base material.
- the second release liner may have an extending portion that extends further and is exposed than the second pressure-sensitive adhesive layer in the direction in which the surface of the second release liner extends. Further, as described above, a portion of the tip of the second release liner on the inside side of the sensor package may be folded into the first base material side to provide a tab.
- the step of bringing the adhesive layer into contact with the curing agent is the same as above.
- the sensor package includes a second release liner in a portion between the first base material and the second adhesive layer, so that the first release liner is released.
- the FBG sensor can be visually observed when attaching the release surface to the target object. Therefore, positioning when attaching the FBG sensor to the object is easy, and workability is excellent.
- the second release liner is peeled off, and the release surface of the second adhesive layer from which the second release liner has been peeled off is attached to the first base material, as shown in FIG.
- a second adhesive layer and a second base material are laminated in this order on the surface of the first base material opposite to the resin portion.
- the sensor package according to the embodiment of the present invention can be set together with a curing agent. That is, a set according to an embodiment of the present invention includes a sensor package according to an embodiment of the present invention and a curing agent.
- the sensor package and curing agent in the set according to the embodiment of the present invention have the same meaning as the above-mentioned sensor package and curing agent, and preferred ones are also the same.
- the sensor package and the target object can be easily and firmly bonded, and the workability is excellent.
- An adhesive structure includes a first base material, a sensor package including an optical fiber having an FBG sensor section disposed on the first base material, and a target object, A bonded structure bonded via a hardened layer, a resin part located on the first base material; a first adhesive layer located on the first base material; the cured layer located on the opposite side of the first base material in the resin part, the first base material is attached to the object via the first adhesive layer, The FBG sensor section in the optical fiber is in contact with the resin section and is held by the hardened layer.
- FIG. 10 is a schematic cross-sectional view of an adhesive structure 400 according to an embodiment of the present invention. Members similar to those in the embodiment of the sensor package described above are designated by the same reference numerals, and detailed description thereof will be omitted.
- An adhesive structure 400 shown in FIG. 10 includes a first base material 20, a sensor package including an optical fiber 15 having an FBG sensor section 10 disposed on the first base material, and a target object 40. , an adhesive structure bonded via a cured layer 30 in which the above-described pressure-sensitive adhesive layer is cured, the resin part 12 located on the first base material 20, and the first base material 20, and the cured layer 30 is located on the surface of the resin portion 12 opposite to the first base material 20.
- the material 20 is attached to the target object 40 via the first adhesive layer 11, and the FBG sensor section 10 of the optical fiber 15 is in contact with the resin section 12 and held by the cured layer 30. ing.
- the adhesive structure 400 shown in FIG. 10 is a structure in which the sensor package shown in FIG. is cured to form a hardened layer 30, resulting in a structure in which the sensor package and the object are bonded together via the hardened layer.
- the FBG sensor section 10 may be located closer to the cured layer 30 side while being in contact with the resin section 12 and being held by the cured layer 30 which is a cured adhesive layer.
- the adhesive structure may include a second adhesive layer and a second base material in this order on the surface of the first base material opposite to the first adhesive layer side. good.
- the adhesive structure is obtained by bonding the sensor package and the object using the above-described sensor package attachment method.
- first base material Various types of base materials can be preferably used as the first base material.
- resin films, paper, cloth, rubber films, foam films, metal foils, composites or laminates thereof, etc. can be used.
- a film base material containing a resin film is preferred from the viewpoint of adhesion and appearance.
- Including a resin film is also advantageous from the viewpoint of dimensional stability, thickness accuracy, workability, tensile strength, etc.
- resin films include polyolefin resin films such as PE, PP, and ethylene/propylene copolymers; polyester resin films such as PET, polybutylene terephthalate, and polyethylene naphthalate; vinyl chloride resin films; and vinyl acetate resin films.
- polyester films are more preferred, and among these, PET films are even more preferred.
- the film base material may have a single layer structure, or may have a multilayer structure of two layers or three or more layers.
- the first base material is preferably transparent or translucent.
- the mounting position of the FBG sensor is important when attaching the sensor package to the target object. Since the first base material is transparent or semi-transparent, the position of the FBG sensor in the sensor package can be grasped, which facilitates positioning when attaching it to a target object, resulting in excellent workability.
- the first base material preferably exhibits a total light transmittance of 80% or more (for example, 90% or more, typically 95% or more). Further, the haze value of the first base material is preferably 10% or less (for example, 5% or less).
- the thickness of the first base material is preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, from the viewpoint of ensuring the strength for the first base material to function as a support in the sensor package. Further, from the viewpoint of realizing appropriate flexibility in the sensor package, the thickness of the first base material is preferably 300 ⁇ m or less, more preferably 200 ⁇ m or less.
- the first adhesive layer can be made of an adhesive.
- the adhesive is a pressure sensitive adhesive.
- the adhesive (adhesive composition) constituting the first adhesive layer include a rubber adhesive, an acrylic adhesive, a vinyl alkyl ether adhesive, a silicone adhesive, a polyester adhesive, and a polyamide adhesive.
- Type adhesives, urethane type adhesives, fluorine type adhesives, styrene-diene block copolymer type adhesives, epoxy type adhesives, etc. can be used singly or in combination of two or more types.
- a photocurable adhesive such as an ultraviolet curable adhesive
- the thickness of the first adhesive layer is preferably 50 ⁇ m or more, more preferably 100 ⁇ m or more, and still more preferably 300 ⁇ m or more. Moreover, it is preferably 2 mm or less, more preferably 1.5 mm or less, and still more preferably 1 mm or less.
- the pressure-sensitive adhesive composition When preparing a pressure-sensitive adhesive composition using a curing reaction using heat or active energy rays, the pressure-sensitive adhesive composition preferably contains a polymerization initiator such as a thermal polymerization initiator or a photopolymerization initiator.
- a polymerization initiator such as a thermal polymerization initiator or a photopolymerization initiator.
- a photopolymerization initiator can be suitably used because it has the advantage of shortening the polymerization time.
- Polymerization initiators can be used alone or in combination of two or more.
- the first adhesive layer may further have a cell structure.
- the "bubble structure” may be any structure that has a gas component; it may be a “bubble” structure that is made only of a gas component and has no outer shell; It may also be a “hollow microsphere” which is a structure encapsulated in an outer shell.
- the first adhesive layer may contain appropriate additives.
- additives include, for example, crosslinking agents (e.g., polyisocyanate crosslinkers, silicone crosslinkers, epoxy crosslinkers, alkyl etherified melamine crosslinkers, etc.), tackifiers (e.g., rosin derivative resins, etc.) , polyterpene resins, petroleum resins, oil-soluble phenolic resins (solid, semi-solid, or liquid at room temperature), plasticizers, fillers, anti-aging agents, antioxidants, colorants (pigments, dyes, etc.), etc. Can be mentioned.
- crosslinking agents e.g., polyisocyanate crosslinkers, silicone crosslinkers, epoxy crosslinkers, alkyl etherified melamine crosslinkers, etc.
- tackifiers e.g., rosin derivative resins, etc.
- polyterpene resins e.g., polyterpene resins, petroleum resins, oil-soluble phenolic resins (
- the adhesive composition forming the first adhesive layer includes monomer components forming the base polymer (for example, alkyl (meth)acrylate, etc.), hollow microspheres, a polymerization initiator, and various additives as necessary. etc. can be prepared by mixing them using a known method. In addition, a portion of the monomer components may be polymerized as necessary for viscosity adjustment or the like.
- preparation method include, for example, the following procedure.
- monomer components e.g., alkyl (meth)acrylates and other copolymerizable monomers
- a polymerization initiator e.g., photopolymerization initiator
- a polymerization reaction for example, ultraviolet polymerization
- a composition for example, silicone dioxide
- Hollow microspheres, fluorosurfactant, and other additives are added to the resulting syrup, if necessary.
- a pressure-sensitive adhesive composition can be obtained by introducing air bubbles into the mixture obtained in (iii) and mixing the mixture.
- the method for preparing the adhesive composition is not limited to this, and for example, when preparing the syrup, a preparation method such as adding a fluorine-based surfactant or hollow microspheres in advance during monomer mixing. But that's fine.
- the first adhesive layer can be formed by a known or commonly used method.
- the above-mentioned adhesive composition is applied onto a first base material to form a first adhesive layer, and the first adhesive layer is cured (e.g., cured by heat) as necessary. , curing with active energy rays) and drying methods. Among these, as mentioned above, curing by irradiation with active energy rays is preferred.
- the above-mentioned pressure-sensitive adhesive composition is coated on a support base material, cured and dried to produce a pressure-sensitive adhesive sheet, and then laminated onto a first base material, the support base material is peeled off, and a first pressure-sensitive adhesive layer is formed. You can also use it as
- Hyper Joint H7004, H7008, H7012, H8004, H8008, H8012, H9004, H9008, H9012 manufactured by Nitto Denko Corporation (base material-less double-sided (adhesive sheet) etc. can be used.
- the resin part is transparent or translucent. Since the resin part is transparent or semi-transparent, the position of the FBG sensor in contact with the resin part can be more accurately determined, which facilitates positioning when attaching it to the object.
- the resin part has adhesiveness.
- the peel adhesive force of the resin part to the aluminum plate is preferably 0.5 N/20 mm or more, more preferably 1.0 N/20 mm or more, and 2.0 N/20 mm or more. is even more preferable. Since the resin part has adhesiveness, the optical fiber can be fixed during manufacturing of the sensor package, resulting in excellent manufacturability. In addition, in the resulting sensor package, since there is no gap between the resin part and the optical fiber, it is possible to prevent outside air and moisture from entering the FBG sensor part 10, resulting in a highly durable sensor package. can.
- the peel adhesion strength of the resin part is the peel adhesion of the resin part when the resin part with a width of 20 mm is attached to an aluminum plate and then the resin part is peeled 90 degrees from the aluminum plate at a speed of 300 mm/min. It is sought after as power.
- the elastic modulus of the resin portion is preferably less than 1.0 ⁇ 10 7 Pa, more preferably 5.0 ⁇ 10 6 Pa or less, even more preferably 1.0 ⁇ 10 6 Pa or less. Further, the lower limit of the elastic modulus of the resin portion is not particularly limited, but is usually 1.0 ⁇ 10 4 Pa or more.
- the optical fiber is excellent in fixing properties. Furthermore, since curing shrinkage and stress relaxation of the resin are less likely to occur, fluctuations in the initial value of the FBG sensor are less likely to occur, and detection accuracy is further improved.
- the elastic modulus of the resin portion can be measured as the initial tensile modulus at 25° C. by the method described later in Examples.
- the thickness of the resin part is preferably 50 ⁇ m or more, more preferably 100 ⁇ m or more, and still more preferably 300 ⁇ m or more. Further, the thickness of the resin part is preferably 2 mm or less, more preferably 1.5 mm or less, and still more preferably 1 mm or less.
- the resin part can be made of adhesive.
- the adhesive (adhesive composition) constituting the resin part include rubber adhesive, acrylic adhesive, vinyl alkyl ether adhesive, silicone adhesive, polyester adhesive, polyamide adhesive, Urethane adhesives, fluorine adhesives, styrene-diene block copolymer adhesives, epoxy adhesives, and the like can be used singly or in combination of two or more.
- the resin part can also be provided using a commercially available adhesive sheet.
- a commercially available adhesive sheet for example, as an adhesive sheet using an acrylic adhesive, "CS9918U” manufactured by Nitto Denko Corporation can be used.
- the adhesive sheet may be used alone, or a plurality of adhesive sheets may be laminated to obtain the desired thickness of the resin portion.
- the resin part can also be formed from a resin composition.
- the resin composition is preferably a liquid curable resin composition containing a curable resin, and preferably contains a resin that hardens at room temperature. By appropriately combining a curable resin and a curing agent, a resin that hardens at room temperature can be obtained.
- curable resin examples include phenol resins, amino resins, unsaturated polyester resins, polyurethane resins, silicone resins, epoxy resins, and thermosetting polyimide resins, with polyurethane resins being preferred.
- the content ratio of the curable resin in the resin part is preferably 5 to 60% by mass, more preferably 10 to 50% by mass from the viewpoint of appropriately curing the resin part.
- the resin part can also be formed using a commercially available liquid curable resin composition.
- a commercially available product containing a silylated urethane resin is "Ultra Versatile SU Soft" manufactured by Konishi Co., Ltd. can be used.
- the optical fiber may be coated with a coating material.
- the material for the covering material include metal materials such as gold coating, and resin materials such as polyimide, silicone, nylon, acrylic, and vinyl chloride.
- the coating material may be a resin coating material that coats the optical fiber with resin, or may be a sheath material or the like.
- the covering material has a high elastic modulus.
- the modulus of elasticity of the covering material is preferably 1.0 x 10 8 Pa or more, more preferably 3.0 x 10 8 Pa or more, even more preferably 5.0 x 10 8 Pa or more.
- Polyimide is preferably mentioned as a material having a high elastic modulus.
- the adhesive layer according to this embodiment is located on the opposite side of the resin portion to the first base material.
- the FBG sensor is provided so as to be in contact with the resin part and held by the adhesive layer. Thereby, the FBG sensor is attached to the object using the adhesive layer.
- the adhesive layer according to this embodiment adheres to the object and the FBG sensor before the adhesive layer is cured, and the adhesive layer adheres to the object and the FBG sensor by hardening the adhesive layer. Adhere firmly.
- the elastic modulus of the cured layer formed on the adhesive layer by curing is 1.0 ⁇ 10 8 Pa. It is preferably at least 3.0 ⁇ 10 8 Pa, more preferably at least 5.0 ⁇ 10 8 Pa, even more preferably at least 5.0 ⁇ 10 8 Pa.
- the adhesive layer is a layer (sheet) that hardens by contacting and reacting with a hardening agent, extends along the surface direction (direction perpendicular to the thickness direction), and has a flat front surface and a back surface. It has an approximately flat plate shape.
- the curing agent for curing the adhesive layer will be described later.
- the adhesive layer is formed into a layer of adhesive components.
- the adhesive component is not particularly limited as long as it is a main component of a two-component adhesive that can form a layer, and examples thereof include silicone compounds, polyol compounds such as polypropylene glycol, urethane resins, and epoxy resins. Examples include resin.
- the adhesive component preferably contains an epoxy resin as a main component. Thereby, the FBG sensor, the resin part, and the target object can be simply and firmly bonded.
- epoxy resin examples include bisphenol epoxy resins such as bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, and hydrogenated bisphenol A epoxy resin, naphthalene epoxy resins, biphenyl epoxy resins, etc.
- Epoxy resins such as dicyclo epoxy resins, alicyclic epoxy resins, such as triglycidyl isocyanurate epoxy resins, hydantoin epoxy resins, glycidyl ether epoxy resins, glycidyl amino epoxy resins, etc. can be mentioned.
- epoxy resin examples include bisphenol-based epoxy resins. Epoxy resins can be used alone or in combination of two or more.
- the epoxy resin may be in any of liquid, semi-solid, and solid forms at room temperature, but it is preferable to use semi-solid epoxy resin alone, or to use liquid epoxy resin and solid epoxy resin together. For example, it can be used in combination with a resin. Thereby, a tacky layered adhesive layer can be reliably formed from the adhesive component.
- the epoxy resin that is liquid at room temperature is liquid at 25°C.
- the viscosity of the liquid epoxy resin at 25°C is, for example, 3 Pa ⁇ s or more, preferably 8 Pa ⁇ s or more, and, for example, 50 Pa ⁇ s or less, preferably 30 Pa ⁇ s or less.
- the epoxy resin that is solid at room temperature is solid at 25°C.
- the softening point of the solid epoxy resin is, for example, 70°C or higher, preferably 75°C or higher.
- the blending ratio of the liquid epoxy resin to the solid epoxy resin is, for example, 1.0 or more, preferably 1.5 or more, and For example, it is 4.0 or less, preferably 3.0 or less.
- the ratio of liquid epoxy resin to solid epoxy resin is equal to or higher than the above lower limit, the viscosity of the adhesive component will be reduced, preventing uneven application and creating a uniform adhesive. You can get layers. If the blending ratio of the liquid epoxy resin to the solid epoxy resin is below the above upper limit, a layered pressure-sensitive adhesive layer with tackiness can be obtained.
- the blending ratio of the epoxy resin is set such that the epoxy resin is the main component in the adhesive component, and specifically, for example, 70% by mass or more, preferably, with respect to the adhesive component.
- the content is 75% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, and, for example, 100% by mass or less.
- the adhesive component consists only of epoxy resin, that is, the blending ratio of the epoxy resin to the adhesive component is 100% by mass.
- an acrylic polymer can be added to the adhesive component. Thereby, the cohesive force of the adhesive component can be improved.
- Acrylic polymers are obtained by reacting monomer components containing (meth)acrylate.
- (Meth)acrylate is alkyl methacrylate and/or alkyl acrylate, specifically methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, ) acrylate, isobutyl (meth)acrylate, s-butyl (meth)acrylate, t-butyl (meth)acrylate, n-butyl (meth)acrylate, pentyl (meth)acrylate, isopentyl (meth)acrylate, hexyl (meth)acrylate , heptyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, nonyl (meth
- the (meth)acrylate is preferably an alkyl (meth)acrylate having 2 to 14 carbon atoms, more preferably an alkyl (meth)acrylate having 4 to 9 carbon atoms.
- (Meth)acrylates can be used alone or in combination of two or more.
- the blending ratio of (meth)acrylate is, for example, 70% by mass or more, preferably 80% by mass or more, and, for example, 99% by mass or less, preferably 98% by mass or less, based on the monomer component.
- the monomer component can also contain a copolymerizable monomer that can be copolymerized with (meth)acrylate.
- copolymerizable monomers examples include carboxyl group-containing monomers such as (meth)acrylic acid, itaconic acid, maleic acid, crotonic acid, and maleic anhydride, or their acid anhydrides, such as 2-hydroxyethyl (meth)acrylate, Hydroxyl group-containing (meth)acrylates such as 3-hydroxypropyl (meth)acrylate, e.g.
- (meth)acrylamide N,N-dimethyl (meth)acrylamide, N-methylol (meth)acrylamide, N-methoxymethyl (meth)acrylate
- Amide group-containing monomers such as acrylamide, N-butoxymethyl (meth)acrylamide, vinyl esters such as vinyl acetate, aromatic vinyl compounds such as styrene, vinyltoluene, e.g. (meth)acrylonitrile, e.g. -(meth)acryloylmorpholine, such as N-vinyl-2-pyrrolidone.
- the copolymerizable monomer preferably a carboxyl group-containing monomer or a hydroxyl group-containing (meth)acrylate, more preferably (meth)acrylic acid or 2-hydroxyethyl (meth)acrylate.
- copolymerizable monomers can be used alone or in combination of two or more.
- a combination of a carboxyl group-containing monomer and a hydroxyl group-containing (meth)acrylate is used, and more preferably a combination of (meth)acrylic acid and 2-hydroxyethyl (meth)acrylate is used.
- the blending ratio of the copolymerizable monomer is, for example, 0.1 parts by mass or more, preferably 0.3 parts by mass or more, and, for example, 15 parts by mass or less, based on 100 parts by mass of (meth)acrylate. Preferably, it is 10 parts by mass or less.
- (meth)acrylate and, if necessary, a copolymerizable monomer are mixed to prepare the monomer component, and this is subjected to, for example, solution polymerization, bulk polymerization, emulsion polymerization, various radical polymerization, etc. It is prepared by known polymerization methods such as polymerization.
- the polymerization method includes solution polymerization.
- solution polymerization for example, a monomer component and a polymerization initiator are mixed in a solvent to prepare a monomer solution, and then the monomer solution is heated.
- the solvent examples include organic solvents.
- organic solvents include aromatic solvents such as toluene, benzene, and xylene; ether solvents such as ethyl acetate; ketone solvents such as acetone and methyl ethyl ketone; ester solvents such as ethyl acetate; , N,N-dimethylformamide and other amide solvents.
- the solvent can be used alone or in combination of two or more, preferably, A combination of an aromatic solvent and an ether solvent may be used.
- the blending ratio of the solvent is, for example, 10 parts by mass or more, preferably 50 parts by mass or more, and, for example, 1000 parts by mass or less, preferably 500 parts by mass or less, based on 100 parts by mass of the monomer component. .
- polymerization initiator examples include peroxide polymerization initiators and azo polymerization initiators.
- peroxide-based polymerization initiators include organic peroxides such as peroxycarbonate, ketone peroxide, peroxyketal, hydroperoxide, dialkyl peroxide, diacyl peroxide, and peroxy ester.
- azo polymerization initiators examples include 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), and 2,2'-azobis(2-methylbutyronitrile). (nitrile), dimethyl 2,2'-azobisisobutyrate, and other azo compounds.
- the polymerization initiator is an azo polymerization initiator.
- the blending ratio of the polymerization initiator is, for example, 0.01 parts by mass or more, preferably 0.05 parts by mass or more, and, for example, 5 parts by mass or less, preferably, with respect to 100 parts by mass of the monomer components. It is 3 parts by mass or less.
- the heating temperature is, for example, 50° C. or more and 80° C. or less
- the heating time is, for example, 1 hour or more and 24 hours or less.
- the blending ratio of the acrylic polymer is, for example, 1 part by mass or more, preferably 2 parts by mass or more, and preferably 50 parts by mass or less, based on 100 parts by mass of the adhesive component. is blended into the epoxy resin in an amount of 30 parts by mass or less. Further, the blending ratio of the acrylic polymer is, for example, 1 part by mass or more, preferably 2 parts by mass or more, and, for example, 43 parts by mass or less, preferably 35 parts by mass, based on 100 parts by mass of the epoxy resin. below.
- the blending ratio of the acrylic polymer is at least the above-mentioned lower limit, the cohesive force of the adhesive component and, by extension, the adhesive force can be improved, and the peel adhesive force of the adhesive layer can be improved. If the blending ratio of the acrylic polymer is below the above upper limit, it can be cured.
- a small amount of a curing agent can also be added to the adhesive component. Thereby, the cohesive force of the adhesive layer can be improved. Examples of curing agents are given below.
- the blending ratio of the curing agent is adjusted to a ratio that improves the peel adhesive force of the adhesive layer while slightly curing (not completely curing) the adhesive component.
- a varnish is prepared by blending an epoxy resin with an acrylic polymer (acrylic polymer solution) and/or a hardening agent, if necessary, and diluting with a solvent.
- the solvent may be any solvent as long as it can dissolve the adhesive component, and examples thereof include the above-mentioned solvents.
- the solvent includes a ketone solvent.
- the concentration of the adhesive component in the varnish is, for example, 20% by mass or more, preferably 40% by mass or more, and, for example, 80% by mass or less, preferably 70% by mass or less.
- a crosslinking agent can also be blended when preparing the adhesive component.
- crosslinking agent examples include an isocyanate crosslinking agent, an aziridine crosslinking agent, an epoxy crosslinking agent, a metal chelate crosslinking agent, and preferably an isocyanate crosslinking agent.
- isocyanate crosslinking agent examples include aromatic diisocyanates such as tolylene diisocyanate and xylene diisocyanate, alicyclic diisocyanates such as isophorone diisocyanate, aliphatic diisocyanates such as hexamethylene diisocyanate, and modified products of these isocyanates. (Specifically, trimethylolpropane tolylene diisocyanate adduct, etc.).
- the crosslinking agent includes a modified isocyanate.
- the blending ratio of the crosslinking agent is, for example, 1 part by mass or more, preferably 5 parts by mass or more, and, for example, 20 parts by mass or less, preferably 15 parts by mass or less, per 100 parts by mass of the acrylic polymer. It is. In this way, an adhesive component is prepared.
- the adhesive layer is formed to a predetermined thickness by applying an adhesive component onto the base material and drying it.
- the thickness of the adhesive layer is, for example, 1 ⁇ m or more, preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, and is, for example, 1000 ⁇ m or less, preferably 500 ⁇ m or less, more preferably 100 ⁇ m or less. .
- the curing agent can harden the adhesive layer by contacting and reacting with the adhesive layer, and may be used as a hardening agent layer (sheet). direction) and has a substantially flat plate shape with a flat front surface and a flat back surface.
- the curing agent layer is formed in a layered form from a curing component, and the curing component contains a curing agent.
- the curing agent is not particularly limited as long as it is a curing agent for a two-component adhesive, and if the adhesive component contains an epoxy resin, for example, an epoxy resin curing agent such as an imidazole compound, an amine compound, an amide compound, etc. can be mentioned.
- imidazole compounds include methylimidazole, 2-ethyl-4-methylimidazole, 1-isobutyl-2-methylimidazole, 1-benzyl-2-methylimidazole, 2-ethyl-4-methylimidazole, ethylimidazole, isopropyl Imidazole, 1,2-dimethylimidazole, 2,4-dimethylimidazole, phenylimidazole, undecylimidazole, heptadecylimidazole, 2-phenyl-4-methylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 2- Examples include phenyl-4-methyl-5-hydroxymethylimidazole, preferably 1-isobutyl-2-methylimidazole, 1-benzyl-2-methylimidazole, 2-ethyl-4-methylimidazole, more preferably, Examples include 1-isobutyl-2-methylimidazole, 1-benzyl-2-methylimid
- amine compound examples include ethylene diamine, propylene diamine, diethylene triamine, triethylene tetramine, amine adducts thereof, metaphenylene diamine, diaminodiphenylmethane, and diaminodiphenyl sulfone.
- amide compound examples include dicyandiamide, polyamide, etc., and preferably dicyandiamide.
- the curing agent include imidazole compounds. The curing agent can be used alone or in combination of two or more.
- the blending ratio of the curing agent is, for example, 10% by mass or more, preferably 30% by mass or more, more preferably 50% by mass or more, still more preferably 80% by mass or more, particularly preferably, It is 90% by mass or more and, for example, 100% by mass or less. If the blending ratio of the curing agent is at least the above lower limit, the pressure-sensitive adhesive layer will have excellent adhesive properties.
- the curing component consists only of a curing agent, ie the proportion of curing agent is 100% by weight, based on the curing component.
- a curing accelerator can be added to the curing component, if necessary.
- curing accelerator examples include 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), N'-phenyl-N,N-dimethylurea, 1,1'-(methyl-m- phenylene)bis(3,3'-dimethylurea), tertiary amine compounds such as triethylenediamine, tri-2,4,6-dimethylaminomethylphenol, e.g.
- DCMU 3-(3,4-dichlorophenyl)-1,1-dimethylurea
- N'-phenyl-N,N-dimethylurea 1,1'-(methyl-m- phenylene)bis(3,3'-dimethylurea
- tertiary amine compounds such as triethylenediamine, tri-2,4,6-dimethylaminomethylphenol, e.g.
- triphenylphosphine tetraphenylphosphonium
- examples include phosphorus compounds such as tetraphenylborate and tetra-n-butylphosphonium-o,o-diethylphosphorodithioate, for example, quaternary ammonium salt compounds, such as organometallic salt compounds, and preferably urea compounds, More preferred is 3-(3,4-dichlorophenyl)-1,1-dimethylurea.
- the curing accelerator can be used alone or in combination of two or more.
- the blending ratio of the curing accelerator is, for example, 10% by mass or more, preferably 15% by mass or more, more preferably 25% by mass or more, and, for example, 40% by mass or less, based on the curing component.
- the blending ratio of the curing accelerator is 10 parts by mass or more, preferably 25 parts by mass or more, and, for example, 60 parts by mass or less, preferably 50 parts by mass or less, based on 100 parts by mass of the curing agent. .
- a curing agent and, if necessary, a curing accelerator are blended. If the hardening agent is in solid form, the hardening agent is dissolved in a solvent if necessary to prepare a varnish.
- the solvent may be any solvent as long as it can dissolve the curing component, and examples thereof include the above-mentioned solvents.
- the concentration of the curing component in the varnish is, for example, 10% by mass or more, preferably 20% by mass or more, and, for example, 90% by mass or less, preferably 50% by mass or less. This prepares the curing component.
- the curing agent is formed to a predetermined thickness by applying a curing component onto the adhesive layer or the base material and drying it.
- the thickness when applying the curing agent is, for example, 1 ⁇ m or more, preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, and, for example, 1000 ⁇ m or less, preferably 800 ⁇ m or less, more preferably 500 ⁇ m or less. be.
- the adhesive layer is interposed between the object and the FBG sensor such that the adhesive layer contacts the FBG sensor and the curing agent contacts the adhesive layer.
- the adhesive component has pressure-sensitive adhesive properties before curing.
- pressure-sensitive adhesive property before curing refers to the fact that the adhesive component has pressure-sensitive adhesive properties before the adhesive component is completely cured by reacting with the curing component. , specifically, from before the adhesive component and the curing component are blended to after the blending until the adhesive component is completely cured. That is, the adhesive layer containing the adhesive component has pressure-sensitive adhesive properties.
- the peel adhesion force of the adhesive layer to the aluminum plate is, for example, 0.5 N/20 mm or more, preferably 1.0 N/20 mm or more, more preferably 2.0 N/20 mm or more, and Preferably, it is 3.0 N/20 mm or more, particularly preferably 3.5 N/20 mm or more, and, for example, 10 N/20 mm or less.
- the adhesive layer has excellent pressure-sensitive adhesive properties and can adhere and position the FBG sensor and the target object. be able to.
- the peel adhesive strength of the adhesive layer is determined when the adhesive layer with a width of 20 mm is attached to an aluminum plate and then the adhesive layer is peeled off at 90 degrees from the aluminum plate at a speed of 300 mm/min. is determined as the peel adhesion force of the adhesive layer.
- the adhesive layer has pressure-sensitive adhesive properties, so that the adhesive layer and the first adhesive layer can be used to protect the object before the adhesive layer is cured. and the FBG sensor are attached. Therefore, reliable positioning of the FBG sensor with respect to the target object becomes easy. Thereafter, the adhesive layer and the curing agent react and are cured.
- the reaction temperature is, for example, room temperature. Further, if necessary, the adhesive layer and the curing agent may be heated, and the heating temperature is, for example, 50°C or higher, preferably 70°C or higher, and, for example, 160°C or lower, preferably , 110°C or less.
- the reaction temperature is preferably room temperature.
- Room temperature is a temperature at which the above-mentioned heating (for example, heating at 50 ° C. or higher) is not performed to cause the adhesive layer and the curing agent to react, and is, for example, lower than 50 ° C., preferably 40 ° C. or lower, Further, the temperature is, for example, 10°C or higher, preferably 20°C or higher.
- reaction temperature is room temperature, there is no need for heating to cause the adhesive layer and the curing agent to react, and the FBG sensor section 10 and the target object can be bonded together even more easily. Furthermore, damage to the FBG sensor section 10 due to heating can be prevented.
- the reaction time is, for example, 15 minutes or more, preferably 1 hour or more, more preferably 12 hours or more, and is, for example, 96 hours or less, preferably 48 hours or less.
- the adhesive layer is cured at room temperature.
- the thickness of the adhesive layer after curing is, for example, 1 ⁇ m or more, preferably 5 ⁇ m or more, more preferably 30 ⁇ m or more, and, for example, 2000 ⁇ m or less, preferably 1000 ⁇ m or less, more preferably 500 ⁇ m.
- the thickness is more preferably 100 ⁇ m or less.
- This cured adhesive layer adheres the FBG sensor and resin portion to the target object.
- the second base material is preferably a film, and preferably a resin film that plays the role of protection and decoration.
- the second base material may be, for example, a weather-resistant film such as a moisture-resistant film or a light-resistant film, a design film, a surface protection film such as a decorative film, or a scratch-proof film. From the viewpoint of outdoor use, a weather-resistant film is preferred.
- Examples of the resin constituting the resin film include polyimide, polyethylene (PE), polypropylene (PP), fluorinated ethylene propylene copolymer (FEP), ethylene/tetrafluoroethylene copolymer (ETFE), and polytetrafluoroethylene.
- Examples include ethylene (PTFE), polyethylene terephthalate (PET), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), and polyvinylidene fluoride (PVDF), with polyvinylidene fluoride (PVDF) being preferred.
- base polymers include rubber-based polymers such as acrylic polymers, silicone polymers, polyesters, polyurethanes, polyamides, polyvinyl ethers, vinyl acetate/vinyl chloride copolymers, modified polyolefins, epoxy systems, fluorine systems, natural rubber, synthetic rubber, etc. It is possible to appropriately select and use one that is.
- Acrylic pressure-sensitive adhesives are preferably used because they exhibit appropriate wettability, cohesiveness, adhesiveness, etc., and are also excellent in weather resistance, heat resistance, etc.
- first release liner and the second release liner conventional release paper can be used, and examples thereof include, but are not limited to, a base material having a release treatment layer, a low adhesive base material made of a fluorine-based polymer, a non-polar A low-adhesive base material made of a polyester polymer can be used.
- Examples of the base material having a release treatment layer include plastic films and paper whose surface has been treated with a release agent such as silicone, long-chain alkyl, fluorine, and molybdenum sulfide.
- fluorine-based polymer of the low-adhesive base material made of a fluorine-based polymer examples include polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene/hexafluoropropylene copolymer, and chlorofluoroethylene.
- fluorine-based polymer of the low-adhesive base material made of a fluorine-based polymer examples include polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene/hexafluoropropylene copolymer, and chlorofluoroethylene.
- fluoroethylene/vinylidene fluoride copolymer examples include fluoroethylene/vinylidene fluoride copolymer.
- nonpolar polymer of the low adhesive base material made of a nonpolar polymer examples include olefin resins (eg, polyethylene, polypropylene, etc.).
- the release liner can be formed by a known or commonly used method.
- the thickness of the release liner and the like are not particularly limited.
- Target object There are no particular restrictions on the object to which the FBG sensor is attached, as long as it can be measured by the FBG sensor, such as metal products, wood products, plastic products, glass products, buildings (inside and outside), etc. Examples include various structures such as walls, floors, ceilings, roads, railways, bridges, tunnels, etc.), electronic equipment, transportation equipment (for example, vehicles such as automobiles, motorcycles and railways, and ships, etc.).
- a first base material comprising: a resin part located on the first base material; a first adhesive layer located on the first base material and for attaching the first base material to the target object; an adhesive layer located on the opposite side of the first base material in the resin part,
- the FBG sensor section in the optical fiber is in contact with the resin section and is held by the adhesive layer.
- sensor package [2] The sensor package according to item [1], wherein the resin portion has adhesiveness. [3] The sensor package according to [1] or [2], wherein the resin portion has an elastic modulus of less than 1.0 ⁇ 10 7 Pa.
- [4] The sensor package according to any one of [1] to [3], wherein the adhesive layer is cured at room temperature.
- [5] The sensor package according to any one of [1] to [4], wherein the adhesive layer is cured by a curing agent.
- [6] According to any one of [1] to [5] above, at least a part of the entire periphery of the resin part excluding the surface on the pressure-sensitive adhesive layer side is covered with the first pressure-sensitive adhesive layer. sensor package.
- the first adhesive layer has an opening that penetrates in the thickness direction, The sensor package according to any one of [1] to [6], wherein the resin portion is provided within the opening.
- a sensor package attachment method for attaching the sensor package according to any one of [1] to [5] to the target object comprising: In the sensor package, surfaces of the first adhesive layer and the adhesive layer on the side to be attached to the target object are protected by a first release liner, The sensor package includes the first base material, a second adhesive layer, and a second adhesive layer on a surface opposite to the surface of the first adhesive layer that is attached to the target object.
- a second release liner is provided in a portion between the first base material and the second adhesive layer, Peeling off the first release liner and applying a curing agent to the adhesive layer; affixing a release surface of the sensor package from which the first release liner has been removed to the target object;
- a method for attaching a sensor package comprising the steps of: peeling off the second release liner, and attaching a release surface of the second adhesive layer from which the second release liner has been peeled off to the first base material.
- the FBG sensor section in the optical fiber is in contact with the resin section and is held by the hardened layer.
- an adhesive layer (manufactured by Nitto Denko Corporation, Hyper Joint H9004) was cut into a size of 50 mm x 30 mm, and the center was cut to provide an opening of 20 mm x 10 mm.
- the above adhesive layer was bonded to a PET base material (manufactured by Toray Industries, Inc., Lumirror S-10 #188) as a first base material, which was cut into a size of 50 mm x 30 mm.
- Two adhesive sheets (Nitto Denko Co., Ltd., CS9918U) were stacked together as a resin part, then cut into 20 mm x 10 mm, which was fitted into the opening of the adhesive layer and laminated onto a PET base material.
- an optical fiber with an FBG sensor (the outer diameter of the optical fiber is 0.125 mm) is coated with a polyimide coating material having an outer diameter of 0.155 mm so that the FBG sensor is located on the resin part.
- the outer diameter of the coating material contained in the PET base material was 0.155 mm) and was installed so that it was parallel to the long side of the PET base material.
- An adhesive layer cut into a size of 20 mm x 10 mm was attached to the resin part from above the optical fiber. Furthermore, a release film serving as the first release liner 18 was covered to produce a sensor package.
- the first adhesive layer prepare two sheets of adhesive layer (manufactured by Nitto Denko Corporation, Hyper Joint H9004) cut into a size of 50 mm x 30 mm and with an opening of 20 mm x 10 mm in the center. did.
- the first adhesive layer was placed on a release film (Diafoil MRF #38 manufactured by Mitsubishi Plastics).
- An optical fiber with an FBG sensor having an outer diameter of 0.155 mm was placed thereon so that the FBG sensor was located within the opening.
- a second adhesive layer was attached from above. As a result, the gap between the optical fiber and the two adhesive layers was filled, and the FBG sensor was placed within the opening of the two adhesive layers.
- the opening was filled with a resin that hardens at room temperature, which is a mixture of epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER827) and curing agent (manufactured by Mitsubishi Chemical Corporation, IBMI12) at a mass ratio of 100:20, and the mixture was heated to 80°C. It was cured for 30 minutes to form a resin part.
- a resin that hardens at room temperature which is a mixture of epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER827) and curing agent (manufactured by Mitsubishi Chemical Corporation, IBMI12) at a mass ratio of 100:20, and the mixture was heated to 80°C. It was cured for 30 minutes to form a resin part.
- a PET base material manufactured by Toray Industries, Inc., Lumirror S-10 #188
- An adhesive layer was prepared by cutting it into a size of 20 mm x 10 mm.
- the release film was peeled off from the laminate, and the adhesive layer was bonded to the resin part.
- a release film serving as the first release liner 18 was covered to produce a sensor package.
- the elastic modulus of the resin part was measured as follows. First, a sample piece of 30 mm x 30 mm was cut out from an adhesive sheet having release-treated PET films on both sides of the adhesive layer, one of the release-treated PET films was peeled off, and the exposed adhesive layer was removed. A measurement sample was prepared by rolling it into a cylindrical shape. Then, a tensile test was carried out on the produced measurement sample at a distance between chucks of 10 mm and a tensile speed of 50 mm/min, and the initial tensile modulus (Pa) was determined by the slope of the first part (tangent) of the obtained stress-strain curve. I asked for
- the elastic modulus of the liquid resin was measured as follows. First, a liquid resin was applied onto a release-treated PET film, and another release-treated PET film was placed thereon and cured under arbitrary conditions. The PET film was peeled off from the obtained sheet, the sheet was cut into 10 mm width x 40 mm length, and a tensile test was conducted at a distance between chucks of 10 mm and a tensile speed of 50 mm/min. The initial tensile modulus (Pa) was determined from the slope of the portion (tangential line).
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Abstract
Description
[1]
第1の基材と、前記第1の基材上に配置されるFBGセンサ部を有する光ファイバと、
を備える、被対象物に貼付されるセンサパッケージであって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置し、前記第1の基材を前記被対象物に貼付するための第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する粘接着剤層と、を有し、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記粘接着剤層に保持されている、
センサパッケージ。
[2]
前記樹脂部は粘着性を有する前記[1]に記載のセンサパッケージ。
[3]
前記樹脂部の弾性率は1.0×107Pa未満である前記[1]に記載のセンサパッケージ。
[4]
前記粘接着剤層は、常温にて硬化する前記[1]に記載のセンサパッケージ。
[5]
前記粘接着剤層は、硬化剤により硬化する前記[1]に記載のセンサパッケージ。
[6]
前記樹脂部における前記粘接着剤層側の面を除く全周囲の少なくとも一部が、前記第1の粘着剤層で覆われている前記[1]に記載のセンサパッケージ。
[7]
前記第1の粘着剤層は、厚み方向に貫通する開口部を有し、
前記開口部内に前記樹脂部が設けられている前記[1]に記載のセンサパッケージ。
[8]
前記第1の粘着剤層及び前記粘接着剤層における前記被対象物に貼付される側の面が、
第1のはく離ライナーにより保護された前記[1]に記載のセンサパッケージ。
[9]
前記第1の基材は、透明又は半透明である前記[1]に記載のセンサパッケージ。
[10]
前記第1の基材における前記第1の粘着剤層側の面とは反対側の面に、第2の粘着剤層と、第2の基材とをこの順で備える前記[1]に記載のセンサパッケージ。
[11]
前記第2の基材は、耐候性基材である前記[10]に記載のセンサパッケージ。
[12]
前記第1の基材と前記第2の粘着剤層との間の一部に第2のはく離ライナーを備える前記[10]に記載のセンサパッケージ。
[13]
前記[1]~[12]のいずれか1に記載のセンサパッケージの取付方法であって、
前記センサパッケージにおける前記粘接着剤層は、硬化剤により硬化し、
前記粘接着剤層及び前記被対象物の少なくとも一つに前記硬化剤を塗布する工程と、
前記センサパッケージを前記粘接着剤層を介して前記被対象物に貼付する工程と、
を含むセンサパッケージの取付方法。
[14]
前記[1]~[12]のいずれか1に記載のセンサパッケージの取付方法であって、
前記センサパッケージにおける前記粘接着剤層は、硬化剤により硬化し、
前記粘接着剤層に前記硬化剤を塗布する工程と、
前記被対象物に前記硬化剤を塗布する工程と、
前記センサパッケージを前記被対象物に、前記粘接着剤層に塗布された前記硬化剤と、前記被対象物に塗布された前記硬化剤とが接するように貼付する工程と、を含むセンサパッケージの取付方法。
[15]
前記[1]~[5]のいずれか1に記載のセンサパッケージを前記被対象物に取り付けるセンサパッケージの取付方法であって、
前記センサパッケージにおける、前記第1の粘着剤層及び前記粘接着剤層の前記被対象物に貼付される側の面が第1のはく離ライナーにより保護され、
前記センサパッケージが、前記第1の粘着剤層の前記被対象物に貼付される側の面とは反対側の面に前記第1の基材と、第2の粘着剤層と、第2の基材とをこの順で備え、
前記第1の基材と前記第2の粘着剤層との間の一部に第2のはく離ライナーを備え、
前記第1のはく離ライナーを剥離し、前記粘接着剤層に硬化剤を塗布する工程と、
前記センサパッケージの前記第1のはく離ライナーを剥離した剥離面を前記被対象物に貼付する工程と、
前記第2のはく離ライナーを剥離し、前記第2の粘着剤層の前記第2のはく離ライナーを剥離した剥離面を前記第1の基材に貼付する工程とを含むセンサパッケージの取付方法。
[16]
前記[1]~[12]のいずれか1に記載のセンサパッケージ及び硬化剤を含むセット。
[17]
第1の基材、および前記第1の基材上に配置されるFBGセンサ部を有する光ファイバを備えるセンサパッケージと、被対象物とが、硬化層を介して接着された、接着構造体であって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置する第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する前記硬化層と、を有し、
前記第1の基材が前記被対象物に前記第1の粘着剤層を介して貼付され、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記硬化層に保持されている、
接着構造体。
本明細書において、範囲を示す「A~B」は、「A以上B以下」を意味する。また、本明細書において、「重量」と「質量」、「重量%」と「質量%」および「重量部」と「質量部」は、それぞれ同義語として扱う。
本発明の実施形態に係るセンサパッケージは、第1の基材と、前記第1の基材上に配置されるFBGセンサ部を有する光ファイバと、を備える、被対象物に貼付されるセンサパッケージであって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置し、前記第1の基材を前記被対象物に貼付するための第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する粘接着剤層と、を有し、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記粘接着剤層に保持されている、ことを特徴とする。
図1は、本発明の第一の実施形態に係るセンサパッケージ100の一構成例の模式的な図である。図2は、図1の模式的なI-I断面図である。図3は、図1の模式的なII-II断面図である。図4は、図1の模式的なIII-III断面図である。
光ファイバ15が被覆材13により被覆されている場合、被対象物からの信号が被覆材で緩和されることを防ぎ、FBGセンサの検出精度を向上させる観点から、被覆材13の弾性率が高弾性率である材料を用いることが好ましい。具体的な材料については後述する。
第二の実施形態において、上記した実施形態と同様の部材については、同一の参照符号を付し、その詳細な説明を省略する。
第三の実施形態において、上記した実施形態と同様の部材については、同一の参照符号を付し、その詳細な説明を省略する。
本発明の実施形態にかかるセンサパッケージの製造方法は、
(I)第1の基材20上に第1の粘着剤層11を設ける工程と、
(II)第1の基材20上に樹脂部12を設ける工程と、
(III)第1の基材20上にFBGセンサ部10が配置されるように光ファイバ15を設ける工程と、
(IV)樹脂部12における第1の基材20とは反対側の面に粘接着剤層14を設ける工程と、を含む。
上記(I)~(IV)の工程は、得られるセンサパッケージにおいて、FBGセンサ部10が樹脂部12に接し、且つ、粘接着剤層14に保持されるように行われる。
第1の粘着剤層11を設ける工程においては、粘着剤組成物の塗布・硬化により第1の基材上に第1の粘着剤層11を直接形成してもよく、予め形成された粘着剤層を貼付してもよい。第1の粘着剤層11が複数の粘着剤層により構成される場合、第1の粘着剤層11を設ける工程は複数回に分けて行ってもよい。
樹脂部12は、第1の粘着剤層11が開口部を有する場合、樹脂部12を形成する樹脂組成物を開口部内に充填し硬化する、又は粘着シートなどの粘着剤を開口部内に配置することにより、設けることができる。
FBGセンサ部10は、第1の粘着剤層11が開口部を有する場合、図4又は5に示すように、第1の粘着剤層11の開口部内、又は、開口部上であって開口部の第1の基材側とは反対側の領域に突き出した位置となるように配置することができる。
例えば、予め粘着シートからなる樹脂部12、FBGセンサ部10をこの順に第1の基材20上に載置し、樹脂部12における被対象物に貼付される側の面を除く全周囲の少なくとも一部を、第1の粘着剤層11で覆ってもよい。
また、例えば、第1の基材20上に第1の粘着剤層11を設けた後、FBGセンサ部10を設置し、次いで、樹脂組成物を充填し硬化することにより樹脂部を設けてもよい。
次いで、第1の粘着剤層11の剥離フィルム30側とは反対側に第1の基材20を積層し、剥離フィルム30を剥離することにより、第1の基材20上に、第1の粘着剤層11、樹脂部12、及び樹脂部12に接するFBGセンサ部10を同時に設けることができる。
粘接着剤層14は、樹脂部12における第1の基材20とは反対側の面に設けることができる。粘接着剤層14は、粘接着組成物の塗布・硬化により直接形成してもよく、予め形成された粘接着剤層14を樹脂部12に貼付してもよい。
例えば、第1の粘着剤層および前記粘接着剤層における、被対象物に貼付される側の面に、第1のはく離ライナー18を貼付する工程を含んでいてもよい。
さらに、第1の基材20と第2の粘着剤層16との間の一部に第2のはく離ライナー19を設ける工程を含んでいてもよい。
また、第2の基材は、耐候性基材であってもよい。
続いて、本実施形態のセンサパッケージの取付方法について説明する。
本実施形態のセンサパッケージの取付方法は、センサパッケージを被対象物に貼付する工程を含む。粘接着剤層の硬化前においては、粘接着剤層および第1の粘着剤層により、被対象物とセンサパッケージとが粘着される。
前記センサパッケージにおける前記粘接着剤層は硬化剤により硬化し、
前記粘接着剤層及び前記被対象物の少なくとも一つに前記硬化剤を塗布する工程と、
前記センサパッケージを前記粘接着剤層を介して前記被対象物に貼付する工程と、を含む。
前記センサパッケージにおける前記粘接着剤層は硬化剤により硬化し、
前記粘接着剤層に前記硬化剤を塗布する工程と、
前記被対象物に前記硬化剤を塗布する工程と、
前記センサパッケージを前記被対象物に、前記粘接着剤層に塗布された前記硬化剤と、前記被対象物に塗布された前記硬化剤とが接するように貼付する工程と、を含む。
反応温度が常温であれば、粘接着剤層と硬化剤とを反応させるための加熱を必要とせず、センサパッケージを被対象物に、より一層簡便に接着することができ作業性に優れる。
硬化層により、被対象物とFBGセンサとが強固に接着され、FBGセンサの検出精度を向上させることができる。
硬化層の剪断接着力が、上記の下限以上であれば、粘接着剤層は、接着性に優れ被対象物とFBGセンサとを確実に接着することができる。
前記センサパッケージにおける、前記第1の粘着剤層および前記粘接着剤層の前記被対象物に貼付される側の面が第1のはく離ライナーにより保護され、
前記センサパッケージが、前記第1の粘着剤層の前記被対象物に貼付される側の面とは反対側の面に前記第1の基材と、第2の粘着剤層と、第2の基材とをこの順で備え、
前記第1の基材と前記第2の粘着剤層との間の一部に第2のはく離ライナーを備え、
前記第1のはく離ライナーを剥離し、前記粘接着剤層に硬化剤を接触させる工程と、
前記センサパッケージの前記第1のはく離ライナーを剥離した剥離面を前記被対象物に貼付する工程と、
前記第2のはく離ライナーを剥離し、前記第2の粘着剤層の前記第2のはく離ライナーを剥離した剥離面を前記第1の基材に貼付する工程とを含む。
なお、上述したとおり、前記第2のはく離ライナーは、前記第2のはく離ライナーの面広がり方向において前記第2の粘着剤層よりも伸びて露出する延出部を有していてもよい。
また、上述したとおり、前記第2のはく離ライナーにおける、センサパッケージの内部側の先端の一部が、第1の基材側に折り込まれることでタブを設けていてもよい。
本発明の実施形態にかかるセンサパッケージは、硬化剤と共にセットとすることができる。すなわち、本発明の実施形態にかかるセットは本発明の実施形態にかかるセンサパッケージおよび硬化剤を含む。
本発明の実施形態にかかるセットにおけるセンサパッケージおよび硬化剤は、上述のセンサパッケージおよび硬化剤と同義であり好ましいものも同様である。
本発明の実施形態にかかる接着構造体は、第1の基材、および前記第1の基材上に配置されるFBGセンサ部を有する光ファイバを備えるセンサパッケージと、被対象物とが、
硬化層を介して接着された、接着構造体であって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置する第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する前記硬化層と、を有し、
前記第1の基材が前記被対象物に前記第1の粘着剤層を介して貼付され、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記硬化層に保持されている。
上記したセンサパッケージの実施形態と同様の部材については、同一の参照符号を付し、その詳細な説明を省略する。
第1の基材としては、各種の基材を好ましく用いることができる。第1の基材としては、例えば、樹脂フィルム、紙、布、ゴムフィルム、発泡体フィルム、金属箔、これらの複合体や積層体等を用いることができる。なかでも、貼り付け性や外観性の観点から、樹脂フィルムを含むフィルム基材が好ましい。樹脂フィルムを含むことは、寸法安定性、厚さ精度、加工性、引張強度等の観点からも有利である。樹脂フィルムの例としては、PE、PP、エチレン・プロピレン共重合体等のポリオレフィン系樹脂フィルム;PET、ポリブチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系樹脂フィルム;塩化ビニル系樹脂フィルム;酢酸ビニル系樹脂フィルム;ポリイミド系樹脂フィルム;ポリアミド系樹脂フィルム;フッ素系樹脂フィルム;セロハン;等が挙げられる。好適例としては、PE、PP、PETから形成された樹脂フィルムが挙げられる。
被対象物の情報を正確に得るには、センサパッケージを被対象物に取付ける際に、FBGセンサの取付位置が重要となる。第1の基材が透明又は半透明であることにより、センサパッケージにおけるFBGセンサの位置が把握できるため、被対象物に取付ける際の位置決めが容易となり作業性に優れる。
第1の粘着剤層は、粘着剤により構成することができる。粘着剤は感圧粘着剤であることが好ましい。
第1の粘着剤層を構成する粘着剤(粘着剤組成物)としては、例えば、ゴム系粘着剤、アクリル系粘着剤、ビニルアルキルエーテル系粘着剤、シリコーン系粘着剤、ポリエステル系粘着剤、ポリアミド系粘着剤、ウレタン系粘着剤、フッ素系粘着剤、スチレン-ジエンブロック共重合体系粘着剤、エポキシ系粘着剤などを1種又は2種以上組み合わせて使用できる。また、粘着剤として光硬化型粘着剤(紫外線硬化型粘着剤など)を用いることもできる。
(i)ベースポリマーを形成するためのモノマー成分(例えば、アルキル(メタ)アクリレートやその他の共重合モノマー)および重合開始剤(例えば、光重合開始剤)を混合してモノマー混合物を調整し、
(ii)該モノマー混合物に対して重合開始剤の種類に応じた重合反応(例えば、紫外線重合)を行って、一部のモノマー成分のみが重合した組成物(シロップ)を調製する。次いで、
(iii)得られたシロップに、必要に応じて、中空微小球状体、フッ素系界面活性剤やその他の添加剤を配合する。さらに、気泡を含有させる場合には、
(iv)(iii)で得られた配合物に、気泡を導入して混合させることにより、粘着剤組成物を得ることができる。なお、粘着剤組成物の調製方法はこれに限定されるものではなく、例えば、前記シロップの調製に際して、フッ素系界面活性剤や中空微小球状体を、モノマー混合中に予め配合するなどの調製方法でもよい。
樹脂部は、透明又は半透明であることが好ましい。樹脂部が透明又は半透明であることにより、樹脂部に接するFBGセンサの位置がより正確に把握できるため、被対象物に取付ける際の位置決めが容易となる。
樹脂部を構成する粘着剤(粘着剤組成物)としては、例えば、ゴム系粘着剤、アクリル系粘着剤、ビニルアルキルエーテル系粘着剤、シリコーン系粘着剤、ポリエステル系粘着剤、ポリアミド系粘着剤、ウレタン系粘着剤、フッ素系粘着剤、スチレン-ジエンブロック共重合体系粘着剤、エポキシ系粘着剤などを1種又は2種以上組み合わせて使用できる。
光ファイバは被覆材により被覆されていてもよい。
被覆材の材料としては、例えば、金コート等の金属材料や、ポリイミド、シリコーン、ナイロン、アクリル、塩化ビニル等の樹脂材料が挙げられる。
被覆材の弾性率は、1.0×108Pa以上であることが好ましく、3.0×108Pa以上であることがより好ましく、5.0×108Pa以上であることがさらに好ましい。
高弾性率である材料としてはポリイミドが好ましく挙げられる。
本実施形態にかかる粘接着剤層は、樹脂部における前記第1の基材とは反対側の面に位置する。そして、FBGセンサは樹脂部と接し、且つ、粘接着剤層に保持されるように設けられる。それにより、FBGセンサが粘接着剤層によって被対象物に貼付される。
粘接着成分は、層を形成することができる2液型接着剤の主剤であれば特に制限されず、例えば、シリコーン化合物、例えば、ポリプロピレングリコールなどのポリオール化合物、例えば、ウレタン樹脂、例えば、エポキシ樹脂などが挙げられる。粘接着成分は、好ましくは、エポキシ樹脂を主成分として含有する。これにより、FBGセンサおよび樹脂部と被対象物とを簡便かつ強固に接着することができる。
好ましくは、粘接着成分は、エポキシ樹脂のみからなり、すなわち、粘接着成分に対して、エポキシ樹脂の配合割合が100質量%である。
(メタ)アクリレートは、単独で用いることができ、2種以上を併用することもできる。
モノマー成分は、さらに、(メタ)アクリレートと共重合可能な共重合性モノマーを含有することもできる。
溶液重合では、例えば、溶媒に、モノマー成分と、重合開始剤とを配合して、モノマー溶液を調製し、その後、モノマー溶液を加熱する。
芳香族系溶媒とエーテル系溶媒との併用が挙げられる。溶媒の配合割合は、モノマー成分100質量部に対して、例えば、10質量部以上、好ましくは、50質量部以上であり、また、例えば、1000質量部以下、好ましくは、500質量部以下である。
パーオキサイド系重合開始剤としては、例えば、パーオキシカーボネート、ケトンパーオキサイド、パーオキシケタール、ハイドロパーオキサイド、ジアルキルパーオキサイド、ジアシルパーオキサイド、パーオキシエステルなどの有機過酸化物が挙げられる。
重合開始剤の配合割合は、モノマー成分100質量部に対して、例えば、0.01質量部以上、好ましくは、0.05質量部以上であり、また、例えば、5質量部以下、好ましくは、3質量部以下である。
これによって、モノマー成分を重合して、アクリル系ポリマーを含むアクリル系ポリマー溶液を得る。
アクリル系ポリマーの配合割合が、上記の上限以下であれば、硬化させることができる。
硬化剤の配合割合は、粘接着剤層の剥離接着力を向上させる一方、粘接着成分をわずかに硬化させる(完全硬化させない)割合に調整される。
架橋剤の配合割合は、アクリル系ポリマー100質量部に対して、例えば、1質量部以上、好ましくは、5質量部以上であり、また、例えば、20質量部以下、好ましくは、15質量部以下である。これにより、粘接着成分を調製する。
粘接着剤層の厚みは、例えば、1μm以上、好ましくは、5μm以上、より好ましくは、10μm以上であり、また、例えば、1000μm以下、好ましくは、500μm以下、より好ましくは、100μm以下である。
硬化剤層は、硬化成分から、層状に形成され、硬化成分は、硬化剤を含有する。
硬化剤としては、好ましくは、イミダゾール化合物が挙げられる。
硬化剤は、単独で用いることができ、2種以上を併用することもできる。
硬化成分には、必要により、硬化促進剤を配合することができる。
硬化促進剤は、単独で用いることができ、2種以上を併用することもできる。
硬化剤が固形状であれば、必要により、溶媒で硬化剤を溶解して、ワニスを調製する。
溶媒としては、硬化成分を溶解できるものであればよく、例えば、上記した溶媒が挙げられる。
ワニスにおける硬化成分の濃度は、例えば、10質量%以上、好ましくは、20質量%以上であり、例えば、90質量%以下、好ましくは、50質量%以下である。
これにより、硬化成分を調製する。
硬化剤を塗布する際の厚みは、例えば、1μm以上、好ましくは、5μm以上、より好ましくは、10μm以上であり、また、例えば、1000μm以下、好ましくは、800μm以下、より好ましくは、500μm以下である。
なお、硬化前の感圧接着性とは、粘接着成分が硬化成分と反応することにより、粘接着成分が完全硬化する前に、粘接着成分が感圧接着性を有することであり、具体的は、粘接着成分と硬化成分とを配合する前から、配合した後、粘接着成分が完全硬化するまでである。
すなわち、粘接着成分を含有する粘接着剤層は、感圧接着性を有する。
なお、粘接着剤層の剥離接着力は、幅20mmの粘接着剤層をアルミニウム板に貼着した後、速度300mm/分で、粘接着剤層をアルミニウム板から90度剥離したときの、粘接着剤層の剥離接着力として求められる。
その後、粘接着剤層と硬化剤とが反応して、硬化する。
また、必要により、粘接着剤層と硬化剤とを加熱してもよく、加熱温度は、例えば、50℃以上、好ましくは、70℃以上であり、また、例えば、160℃以下、好ましくは、110℃以下である。
第2の基材は、フィルムであることが好ましく、保護や加飾の役割を担う樹脂フィルムであることが好ましい。第2の基材としては、例えば、耐湿性フィルムや耐光性フィルム等の耐候性フィルム、意匠フィルム、装飾フィルムや防キズフィルム等の表面保護フィルム等であってもよい。屋外での使用の観点から耐候性フィルムであることが好ましい。
第2の粘着剤層としては、特に制限なく使用できる。例えば、アクリル系ポリマー、シリコーン系ポリマー、ポリエステル、ポリウレタン、ポリアミド、ポリビニルエーテル、酢酸ビニル/塩化ビニルコポリマー、変性ポリオレフィン、エポキシ系、フッ素系、天然ゴム、合成ゴム等のゴム系などのポリマーをベースポリマーとするものを適宜に選択して用いることができる。適度な濡れ性、凝集性および粘着性等を示し、耐候性や耐熱性等にも優れるという点からは、アクリル系粘着剤が好ましく用いられる。
第1の粘着剤層および第2の粘着剤層を使用時まで保護する第1のはく離ライナーおよび第2のはく離ライナーについて説明する。
FBGセンサが貼付される被対象物としては、FBGセンサによる測定の対象とすることのできるものであれば特に制限はなく、例えば、金属製品、木工製品、プラスチック製品、ガラス製品、建造物(内外壁面、床面、および天井面、道路、鉄道、橋梁、トンネル等)、電子機器、運輸機器(例えば、自動車、二輪車および鉄道等の車両、並びに船舶等)等、様々な構造物が挙げられる。
[1]
第1の基材と、前記第1の基材上に配置されるFBGセンサ部を有する光ファイバと、
を備える、被対象物に貼付されるセンサパッケージであって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置し、前記第1の基材を前記被対象物に貼付するための第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する粘接着剤層と、を有し、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記粘接着剤層に保持されている、
センサパッケージ。
[2]
前記樹脂部は粘着性を有する前記[1]に記載のセンサパッケージ。
[3]
前記樹脂部の弾性率は1.0×107Pa未満である前記[1]または[2]に記載のセンサパッケージ。
[4]
前記粘接着剤層は、常温にて硬化する前記[1]~[3]のいずれか1に記載のセンサパッケージ。
[5]
前記粘接着剤層は、硬化剤により硬化する前記[1]~[4]のいずれか1に記載のセンサパッケージ。
[6]
前記樹脂部における前記粘接着剤層側の面を除く全周囲の少なくとも一部が、前記第1の粘着剤層で覆われている前記[1]~[5]のいずれか1に記載のセンサパッケージ。
[7]
前記第1の粘着剤層は、厚み方向に貫通する開口部を有し、
前記開口部内に前記樹脂部が設けられている前記[1]~[6]のいずれか1に記載のセンサパッケージ。
[8]
前記第1の粘着剤層及び前記粘接着剤層における前記被対象物に貼付される側の面が、
第1のはく離ライナーにより保護された前記[1]~[7]のいずれか1に記載のセンサパッケージ。
[9]
前記第1の基材は、透明又は半透明である前記[1]~[8]のいずれか1に記載のセンサパッケージ。
[10]
前記第1の基材における前記第1の粘着剤層側の面とは反対側の面に、第2の粘着剤層と、第2の基材とをこの順で備える前記[1]~[9]のいずれか1に記載のセンサパッケージ。
[11]
前記第2の基材は、耐候性基材である前記[10]に記載のセンサパッケージ。
[12]
前記第1の基材と前記第2の粘着剤層との間の一部に第2のはく離ライナーを備える前記[10]又は前記[11]に記載のセンサパッケージ。
[13]
前記[1]~[12]のいずれか1に記載のセンサパッケージの取付方法であって、
前記センサパッケージにおける前記粘接着剤層は、硬化剤により硬化し、
前記粘接着剤層及び前記被対象物の少なくとも一つに前記硬化剤を塗布する工程と、
前記センサパッケージを前記粘接着剤層を介して前記被対象物に貼付する工程と、
を含むセンサパッケージの取付方法。
[14]
前記[1]~[12]のいずれか1に記載のセンサパッケージの取付方法であって、
前記センサパッケージにおける前記粘接着剤層は、硬化剤により硬化し、
前記粘接着剤層に前記硬化剤を塗布する工程と、
前記被対象物に前記硬化剤を塗布する工程と、
前記センサパッケージを前記被対象物に、前記粘接着剤層に塗布された前記硬化剤と、前記被対象物に塗布された前記硬化剤とが接するように貼付する工程と、を含むセンサパッケージの取付方法。
[15]
前記[1]~[5]のいずれか1に記載のセンサパッケージを前記被対象物に取り付けるセンサパッケージの取付方法であって、
前記センサパッケージにおける、前記第1の粘着剤層及び前記粘接着剤層の前記被対象物に貼付される側の面が第1のはく離ライナーにより保護され、
前記センサパッケージが、前記第1の粘着剤層の前記被対象物に貼付される側の面とは反対側の面に前記第1の基材と、第2の粘着剤層と、第2の基材とをこの順で備え、
前記第1の基材と前記第2の粘着剤層との間の一部に第2のはく離ライナーを備え、
前記第1のはく離ライナーを剥離し、前記粘接着剤層に硬化剤を塗布する工程と、
前記センサパッケージの前記第1のはく離ライナーを剥離した剥離面を前記被対象物に貼付する工程と、
前記第2のはく離ライナーを剥離し、前記第2の粘着剤層の前記第2のはく離ライナーを剥離した剥離面を前記第1の基材に貼付する工程とを含むセンサパッケージの取付方法。
[16]
前記[1]~[12]のいずれか1に記載のセンサパッケージ及び硬化剤を含むセット。
[17]
第1の基材、および前記第1の基材上に配置されるFBGセンサ部を有する光ファイバを備えるセンサパッケージと、被対象物とが、硬化層を介して接着された、接着構造体であって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置する第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する前記硬化層と、を有し、
前記第1の基材が前記被対象物に前記第1の粘着剤層を介して貼付され、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記硬化層に保持されている、
接着構造体。
液状のビスフェノールA型エポキシ樹脂(商品名「jER828」、三菱ケミカル製)69質量部と、固形状のビスフェノールA型エポキシ樹脂(商品名「jER1256」、三菱ケミカル製)30質量部と、固形状の特殊ノボラック型エポキシ樹脂(商品名「jER157S70」、三菱ケミカル製)1質量部を混合し、エポキシ樹脂濃度が65質量%になるようにメチルエチルケトンを加えて希釈し、ワニスを調製した。これを乾燥後の厚みが50μmになるように、剥離処理したポリエチレンテレフタレートフィルム(商品名「ダイアホイルMRF#38」、三菱樹脂社製)の剥離処理面に塗工し、80℃で3分、加熱して乾燥させ、粘接着剤層を得た。その後、粘接着剤層を、別のポリエチレンテレフタレートフィルムに、粘接着剤層が2枚のポリエチレンテレフタレートフィルムに挟まれるように、接触させた。
第1の粘着剤層として、粘着剤層(日東電工(株)製、ハイパージョイントH9004)を50mm×30mmのサイズにカットし、中央部をカットして20mm×10mmの開口部を設け準備した。
樹脂部として粘着シート(日東電工(株)製、CS9918U)を2枚重ねたのち、20mm×10mmにカットして準備し、粘着剤層の開口部にはめ、PET基材上に積層した。
さらに、樹脂部上にFBGセンサが位置するように、外径が0.155mmのポリイミド製被覆材で被覆されたFBGセンサ付光ファイバ(光ファイバの外径が0.125mmであり、光ファイバを含む被覆材の外径が0.155mm)をPET基材の長辺と平行になるように設置した。
光ファイバの上から20mm×10mmにカットした粘接着剤層を樹脂部に貼り合わせた。
さらに、第1のはく離ライナー18としての剥離フィルムを被せ、センサパッケージを製造した。
樹脂部をシリル化ウレタン樹脂の液状樹脂(コニシ(株)製、ウルトラ多用途SUソフト)に変更し、粘着剤層の開口部に流し込み、24時間室温(25℃)で硬化させた以外は製造例1と同様にしてセンサパッケージを製造した。
第1の粘着剤層として、粘着剤層(日東電工(株)製、ハイパージョイントH9004)を50mm×30mmのサイズにカットし、中央部に20mm×10mmの開口部を設けたものを2枚準備した。
1枚目の粘着剤層を剥離フィルム(三菱樹脂製ダイアホイルMRF#38)上に配置した。その上に開口部内にFBGセンサが位置するように外径0.155mmのFBGセンサ付き光ファイバを載置した。次に、2枚目の粘着剤層を上から貼り合わせた。これによって、光ファイバと2枚の粘着剤層との間隙が埋められ、FBGセンサが2枚の粘着剤層の開口部内に配置された。
粘接着剤層を20mm×10mmにカットし準備した。積層体から剥離フィルムを剥離し、粘接着剤層を樹脂部に貼り合わせた。
さらに、第1のはく離ライナー18としての剥離フィルムを被せ、センサパッケージを製造した。
<光ファイバの固定>
20mm×10mmにカットおよび成型された樹脂部を準備し、上から長さ5cmの光ファイバを設置し、その上にはく離ライナーを被せてから、ハンドローラーを用いて押圧した。その後、はく離ライナーを剥離し、逆さにした際にファイバが1分間落下しない場合を固定性あり、落下した場合を固定性なしとした。なお、粘接着剤層は柔らかく、光ファイバが細いため、貼り合わせの際の圧力で粘接着剤層が割れるため、得られたセンサパッケージにおいて、光ファイバは、図5に示すように、その一部が粘接着剤層より突き出して露出した状態となった。
樹脂部の弾性率は、以下のように測定した。まず、粘着剤層の両面に剥離処理されたPETフィルムを有する粘着シートから、30mm×30mmの大きさの試料片を切り出し、一方の剥離処理されたPETフィルムを剥離し、露出させた粘着層を円筒状に丸めて測定用サンプルを作製した。そして、作製した測定用サンプルをチャック間距離10mm、引張速度50mm/minで引張試験を実施し、得られた応力-ひずみ曲線の最初の部分(接線)の傾きにより、初期引張弾性率(Pa)を求めた。
FBGセンサにインテロゲータ BraggMETER FS22(HBM)を接続し、これを用いて、温度一定(25℃)の場所で測定される波長スペクトルにおけるピーク波長を計測した。センサパッケージへの加工前(製造前)の初期の波長を(A)、製造後の波長を(B)、センサパッケージ製造から4日後の波長を(C)とする。
製造前後での波長シフト量(nm)=B-A
製造後から4日後の波長シフト量(nm)=C-B
400 接着構造体
10 FBGセンサ部
11 第1の粘着剤層
12 樹脂部
13 被覆材
14 粘接着剤層
15 光ファイバ
16 第2の粘着剤層
17 第2の基材
18 第1のはく離ライナー
19 第2のはく離ライナー
19c タブ
20 第1の基材
30 硬化層
40 被対象物
Claims (17)
- 第1の基材と、前記第1の基材上に配置されるFBGセンサ部を有する光ファイバと、
を備える、被対象物に貼付されるセンサパッケージであって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置し、前記第1の基材を前記被対象物に貼付するための第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する粘接着剤層と、を有し、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記粘接着剤層に保持されている、
センサパッケージ。 - 前記樹脂部は粘着性を有する請求項1に記載のセンサパッケージ。
- 前記樹脂部の弾性率は1.0×107Pa未満である請求項1に記載のセンサパッケージ。
- 前記粘接着剤層は、常温にて硬化する請求項1に記載のセンサパッケージ。
- 前記粘接着剤層は、硬化剤により硬化する請求項1に記載のセンサパッケージ。
- 前記樹脂部における前記粘接着剤層側の面を除く全周囲の少なくとも一部が、前記第1の粘着剤層で覆われている請求項1に記載のセンサパッケージ。
- 前記第1の粘着剤層は、厚み方向に貫通する開口部を有し、
前記開口部内に前記樹脂部が設けられている請求項1に記載のセンサパッケージ。 - 前記第1の粘着剤層及び前記粘接着剤層における前記被対象物に貼付される側の面が、第1のはく離ライナーにより保護された請求項1に記載のセンサパッケージ。
- 前記第1の基材は、透明又は半透明である請求項1に記載のセンサパッケージ。
- 前記第1の基材における前記第1の粘着剤層側の面とは反対側の面に、第2の粘着剤層と、第2の基材とをこの順で備える請求項1に記載のセンサパッケージ。
- 前記第2の基材は、耐候性基材である請求項10に記載のセンサパッケージ。
- 前記第1の基材と前記第2の粘着剤層との間の一部に第2のはく離ライナーを備える請求項10に記載のセンサパッケージ。
- 請求項1~12のいずれか1項に記載のセンサパッケージの取付方法であって、
前記センサパッケージにおける前記粘接着剤層は、硬化剤により硬化し、
前記粘接着剤層及び前記被対象物の少なくとも一つに前記硬化剤を塗布する工程と、
前記センサパッケージを前記粘接着剤層を介して前記被対象物に貼付する工程と、
を含むセンサパッケージの取付方法。 - 請求項1~12のいずれか1項に記載のセンサパッケージの取付方法であって、
前記センサパッケージにおける前記粘接着剤層は、硬化剤により硬化し、
前記粘接着剤層に前記硬化剤を塗布する工程と、
前記被対象物に前記硬化剤を塗布する工程と、
前記センサパッケージを前記被対象物に、前記粘接着剤層に塗布された前記硬化剤と、前記被対象物に塗布された前記硬化剤とが接するように貼付する工程と、を含むセンサパッケージの取付方法。 - 請求項1~5のいずれか1項に記載のセンサパッケージを前記被対象物に取り付けるセンサパッケージの取付方法であって、
前記センサパッケージにおける、前記第1の粘着剤層及び前記粘接着剤層の前記被対象物に貼付される側の面が第1のはく離ライナーにより保護され、
前記センサパッケージが、前記第1の粘着剤層の前記被対象物に貼付される側の面とは反対側の面に前記第1の基材と、第2の粘着剤層と、第2の基材とをこの順で備え、
前記第1の基材と前記第2の粘着剤層との間の一部に第2のはく離ライナーを備え、
前記第1のはく離ライナーを剥離し、前記粘接着剤層に硬化剤を塗布する工程と、
前記センサパッケージの前記第1のはく離ライナーを剥離した剥離面を前記被対象物に貼付する工程と、
前記第2のはく離ライナーを剥離し、前記第2の粘着剤層の前記第2のはく離ライナーを剥離した剥離面を前記第1の基材に貼付する工程とを含むセンサパッケージの取付方法。 - 請求項1~12のいずれか1項に記載のセンサパッケージ及び硬化剤を含むセット。
- 第1の基材、および前記第1の基材上に配置されるFBGセンサ部を有する光ファイバを備えるセンサパッケージと、被対象物とが、硬化層を介して接着された、接着構造体であって、
前記第1の基材上に位置する樹脂部と、
前記第1の基材上に位置する第1の粘着剤層と、
前記樹脂部における前記第1の基材とは反対側の面に位置する前記硬化層と、を有し、
前記第1の基材が前記被対象物に前記第1の粘着剤層を介して貼付され、
前記光ファイバにおける前記FBGセンサ部は、前記樹脂部と接し、かつ前記硬化層に保持されている、
接着構造体。
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| EP (1) | EP4502545A1 (ja) |
| JP (1) | JPWO2023191017A1 (ja) |
| KR (1) | KR20250006826A (ja) |
| CN (1) | CN119325549A (ja) |
| WO (1) | WO2023191017A1 (ja) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006208264A (ja) * | 2005-01-31 | 2006-08-10 | Fujikura Ltd | 光ファイバセンサ |
| JP2010519517A (ja) * | 2007-02-19 | 2010-06-03 | ホッティンゲル・バルドヴィン・メステクニーク・ゲゼルシヤフト・ミト・ベシュレンクテル・ハフツング | 光学歪計 |
| WO2021054350A1 (ja) | 2019-09-17 | 2021-03-25 | 日東電工株式会社 | センサパッケージおよびセンサパッケージの取付方法 |
| KR20210097551A (ko) * | 2020-01-30 | 2021-08-09 | 한국교통대학교산학협력단 | 보강재용 광센서모듈 |
| JP2022059637A (ja) | 2019-09-11 | 2022-04-13 | 有限会社ブンカドー | 寝具 |
-
2023
- 2023-03-30 CN CN202380031627.0A patent/CN119325549A/zh active Pending
- 2023-03-30 EP EP23781025.4A patent/EP4502545A1/en active Pending
- 2023-03-30 WO PCT/JP2023/013444 patent/WO2023191017A1/ja not_active Ceased
- 2023-03-30 US US18/852,542 patent/US20250231337A1/en active Pending
- 2023-03-30 JP JP2024512880A patent/JPWO2023191017A1/ja active Pending
- 2023-03-30 KR KR1020247032435A patent/KR20250006826A/ko active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006208264A (ja) * | 2005-01-31 | 2006-08-10 | Fujikura Ltd | 光ファイバセンサ |
| JP2010519517A (ja) * | 2007-02-19 | 2010-06-03 | ホッティンゲル・バルドヴィン・メステクニーク・ゲゼルシヤフト・ミト・ベシュレンクテル・ハフツング | 光学歪計 |
| JP2022059637A (ja) | 2019-09-11 | 2022-04-13 | 有限会社ブンカドー | 寝具 |
| WO2021054350A1 (ja) | 2019-09-17 | 2021-03-25 | 日東電工株式会社 | センサパッケージおよびセンサパッケージの取付方法 |
| KR20210097551A (ko) * | 2020-01-30 | 2021-08-09 | 한국교통대학교산학협력단 | 보강재용 광센서모듈 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250231337A1 (en) | 2025-07-17 |
| JPWO2023191017A1 (ja) | 2023-10-05 |
| CN119325549A (zh) | 2025-01-17 |
| EP4502545A1 (en) | 2025-02-05 |
| KR20250006826A (ko) | 2025-01-13 |
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