WO2020138008A1 - 通気性粘着シート及び通気性製品 - Google Patents
通気性粘着シート及び通気性製品 Download PDFInfo
- Publication number
- WO2020138008A1 WO2020138008A1 PCT/JP2019/050443 JP2019050443W WO2020138008A1 WO 2020138008 A1 WO2020138008 A1 WO 2020138008A1 JP 2019050443 W JP2019050443 W JP 2019050443W WO 2020138008 A1 WO2020138008 A1 WO 2020138008A1
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- WIPO (PCT)
- Prior art keywords
- sensitive adhesive
- pressure
- breathable
- adhesive sheet
- sheet
- Prior art date
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- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/26—All layers being made of paper or paperboard
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
- B32B2264/0214—Particles made of materials belonging to B32B27/00
- B32B2264/0257—Polyolefin particles, e.g. polyethylene or polypropylene homopolymers or ethylene-propylene copolymers
-
- 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
- B32B2307/724—Permeability to gases, adsorption
-
- 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
- B32B2307/732—Dimensional properties
-
- 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
- B32B2307/748—Releasability
-
- 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
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/18—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet characterized by perforations in the adhesive tape
-
- 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
-
- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
-
- 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
- C09J2479/00—Presence of polyamine or polyimide
- C09J2479/08—Presence of polyamine or polyimide polyimide
- C09J2479/086—Presence of polyamine or polyimide polyimide in the substrate
Definitions
- the present invention relates to a breathable adhesive sheet having breathability in the thickness direction and a breathable product including the breathable adhesive sheet.
- FIG. 16 shows an example of a housing (ventilation housing) in which a ventilation hole is provided and a ventilation film covering the ventilation hole is arranged on the surface.
- the housing 101 in FIG. 16 has a vent 103 that connects the inside and the outside of the housing 101.
- a ventilation film 105 that covers the ventilation hole 103 is arranged on the surface 102 of the housing 101.
- the ventilation film 105 is bonded to the surface 102 of the housing 101 by an adhesive layer 104 arranged on the peripheral edge of the film 105.
- ventilation 106 is secured through the ventilation hole 103, the opening of the adhesive layer 104, and the ventilation film 105.
- Patent Document 1 An example of the housing 101 having such a ventilation structure is disclosed in Patent Document 1 (see FIG. 11).
- the conventional pressure-sensitive adhesive layer does not have its own breathability (thickness direction breathability). Therefore, in the case 101 of FIG. 16, the pressure-sensitive adhesive layer 104 is arranged only on the peripheral portion of the gas permeable film 105 to secure the air ventilation 106 by the air vent 103.
- the present inventors it has been found that there are cases where the conventional pressure-sensitive adhesive layer cannot sufficiently cope with a small vent hole. Therefore, the present inventors have further studied the technique of making the pressure-sensitive adhesive layer itself breathable in the thickness direction to give a breathable pressure-sensitive adhesive sheet. It was found that the desired characteristics tend not to be obtained.
- the present invention is a breathable pressure-sensitive adhesive sheet having breathability in the thickness direction, and it is possible to obtain good properties including breathability even when a sheet having a small area is used.
- the purpose is to provide a seat.
- the present invention is A breathable pressure-sensitive adhesive sheet having air permeability in the thickness direction, A pressure-sensitive adhesive layer having a first through hole extending in the thickness direction, At least one surface of the adhesive layer constitutes an adhesive surface, The average opening diameter of the through holes is 1.0 to 50 ⁇ m, The average distance between the through holes is 5 to 400 ⁇ m, The variation in air permeability in the thickness direction is defined by Japanese Industrial Standards (hereinafter referred to as "JIS") L1096:2010 as a predetermined value in which the effective measurement area is selected from 0.5 to 2.0 mm 2.
- JIS Japanese Industrial Standards
- a breathable pressure-sensitive adhesive sheet which is 22% or less when expressed by the coefficient of variation of air permeability measured according to the property measurement method B (Gurley type method), I will provide a.
- the present invention provides A breathable product having a surface having an opening, wherein the surface is breathable through the opening, Further comprising a breathable adhesive sheet attached to the surface so as to cover the opening,
- the breathable adhesive sheet is a breathable product which is the breathable adhesive sheet of the present invention, I will provide a.
- the present invention provides A porous substrate, and a breathable adhesive sheet attached to the surface of the porous substrate,
- the breathable adhesive sheet is a breathable product which is the breathable adhesive sheet of the present invention, I will provide a.
- the average opening diameter and the average spacing of the through holes that bring the sheet to the air permeability in the thickness direction are small, and the number of through holes existing in a predetermined area can be increased. Therefore, even when the sheet has a small area, it is possible to secure a sufficient number of through holes that contribute to ventilation, and improve the reliability of ventilation. Further, in the breathable pressure-sensitive adhesive sheet of the present invention, the variation in air permeability in the thickness direction in a small area is small, and even when a sheet having a small area is obtained, the breathability desired as a breathable pressure-sensitive adhesive sheet can be more reliably obtained. it can.
- the breathable pressure-sensitive adhesive sheet of the present invention due to the structure of the highly uniform sheet that can achieve the small variation in air permeability, characteristics other than breathability, for example, the adhesive force of the pressure-sensitive adhesive surface, also have good characteristics. Can be expected.
- FIG. 1A is a plan view schematically showing the breathable pressure-sensitive adhesive sheet according to the first embodiment.
- 1B is a cross-sectional view showing a cross section BB of the breathable pressure-sensitive adhesive sheet shown in FIG. 1A.
- FIG. 2 is a cross-sectional view schematically showing a modified example of the breathable pressure-sensitive adhesive sheet of the first embodiment.
- FIG. 3A is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the first embodiment.
- FIG. 3B is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the first embodiment.
- FIG. 3C is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the first embodiment.
- FIG. 3D is a schematic process diagram for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the first embodiment.
- FIG. 4A is a plan view schematically showing the breathable pressure-sensitive adhesive sheet according to the second embodiment.
- 4B is a cross-sectional view showing a cross section BB of the breathable pressure-sensitive adhesive sheet shown in FIG. 4A.
- FIG. 5A is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the second embodiment.
- FIG. 5B is a schematic process diagram for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the second embodiment.
- FIG. 5C is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the second embodiment.
- FIG. 6A is a plan view schematically showing the breathable pressure-sensitive adhesive sheet according to the third embodiment.
- FIG. 6B is a sectional view showing a section BB of the breathable pressure-sensitive adhesive sheet shown in FIG. 6A.
- FIG. 7A is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the third embodiment.
- FIG. 7B is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the third embodiment.
- FIG. 7C is a schematic process drawing for explaining the method for manufacturing the breathable pressure-sensitive adhesive sheet according to the third embodiment.
- FIG. 8A is a perspective view schematically showing an example of the breathable product of the present invention.
- FIG. 8A is a perspective view schematically showing an example of the breathable product of the present invention.
- FIG. 8B is a perspective view schematically showing another example of the breathable product of the present invention.
- FIG. 9 is an observation image (SEM observation image) obtained by observing the pressure-sensitive adhesive surface of the breathable pressure-sensitive adhesive sheet prepared in Example 1 with a scanning electron microscope (hereinafter referred to as “SEM”).
- FIG. 10 is an SEM observation image of the adhesive surface of the breathable adhesive sheet produced in Example 2.
- FIG. 11 is an SEM observation image of the adhesive surface of the breathable adhesive sheet produced in Comparative Example 1.
- FIG. 12 is an SEM observation image of the adhesive surface of the breathable adhesive sheet produced in Comparative Example 2.
- FIG. 13 is an SEM observation image of the adhesive surface of the breathable adhesive sheet produced in Example 3.
- FIG. 9 is an observation image (SEM observation image) obtained by observing the pressure-sensitive adhesive surface of the breathable pressure-sensitive adhesive sheet prepared in Example 1 with a scanning electron microscope (hereinafter referred to as “SEM”).
- FIG. 10 is an SEM observation image of the adhesive
- FIG. 14 is an SEM observation image of the pressure-sensitive adhesive surface of the breathable pressure-sensitive adhesive sheet produced in Example 4.
- FIG. 15 is an SEM observation image of the pressure-sensitive adhesive surface of the breathable pressure-sensitive adhesive sheet produced in Example 5. It is sectional drawing which shows typically the vicinity of the ventilation hole in an example of the conventional ventilation housing.
- FIGS. 1A and 1B show a cross section BB of the breathable pressure-sensitive adhesive sheet 1 (1A) of FIG. 1A.
- the breathable pressure-sensitive adhesive sheet 1A is a single-layer pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer 2 having a first through hole 3 extending in the thickness direction.
- the air-permeable pressure-sensitive adhesive sheet 1A has air permeability in the thickness direction due to the through holes 3.
- both surfaces 4A and 4B of the pressure-sensitive adhesive layer 2 form the pressure-sensitive adhesive surface 4.
- the breathable pressure-sensitive adhesive sheet 1A is a double-sided pressure-sensitive adhesive sheet without a base material.
- the individual through holes 3 are usually independent of each other.
- the extending direction of the through hole 3 is a direction perpendicular to the adhesive surface 4 of the adhesive layer 2.
- the extending direction of the through-hole 3 is limited as long as it extends in the thickness direction of the pressure-sensitive adhesive layer 2, in other words, the through-hole 3 connects one surface 4A and the other surface 4B of the pressure-sensitive adhesive layer.
- the pressure-sensitive adhesive layer 2 may be inclined from the direction perpendicular to the pressure-sensitive adhesive surface 4.
- the shape of the opening of the through hole 3 is a circle when viewed from the direction perpendicular to the adhesive surface 4.
- the shape of the opening of the through hole 3 is not limited to this example, and may be a polygon including a square and a rectangle, an ellipse, or an amorphous shape when viewed from the direction perpendicular to the adhesive surface 4.
- the average opening diameter of the through holes 3 is 1.0 to 50 ⁇ m.
- the upper limit of the average opening diameter of the through holes 3 may be 45 ⁇ m or less, 40 ⁇ m or less, and further 35 ⁇ m or less.
- the lower limit of the average opening diameter of the through holes 3 may be 5.0 ⁇ m or more, further 10 ⁇ m or more.
- the average opening diameter of the through holes 3 means the average value of the diameters of the openings of at least three through holes 3 on the adhesive surface of the adhesive layer 2.
- the diameter of the opening is the diameter of an imaginary circle having the same area as the area of the opening.
- both surfaces 4A and 4B of the pressure-sensitive adhesive layer 2 form a pressure-sensitive adhesive surface and the average opening diameter of the through holes 3 on each pressure-sensitive adhesive surface is different, a relatively large value is set as the average opening diameter of the through holes 3. It can be a caliber.
- the variation in the opening diameter of the through-hole 3 is, for example, 9% or less, may be 8% or less, 7% or less, 6% or less, or even 5% or less, which is represented by the coefficient of variation of the opening diameter.
- the lower limit of the variation in the opening diameter of the through holes 3 is represented by the coefficient of variation of the opening diameter and is, for example, 0.5% or more.
- the coefficient of variation (CV: Coefficient of Variation) is a coefficient that is an index of the dispersion of multiple numerical values, and is a value obtained by dividing the standard deviation ( ⁇ ) of the numerical values by the average value (Av). is there.
- the coefficient of variation is a value calculated from the standard deviation and average value of at least three numerical values.
- the average distance between the through holes 3 is 5 to 400 ⁇ m.
- the upper limit of the average spacing of the through holes 3 may be 300 ⁇ m or less, 250 ⁇ m or less, 200 ⁇ m or less, 150 ⁇ m or less, and further 120 ⁇ m or less.
- the lower limit of the average distance between the through holes 3 may be 10 ⁇ m or more, 20 ⁇ m or more, and further 30 ⁇ m or more.
- the average distance between the through holes 3 means the average value of the center-to-center distances of at least six through holes 3, and the center-to-center distance of the through holes 3 is the average value in the adhesive surface 4 of the adhesive layer 2.
- the center of the opening of the through hole 3 is non-circular when viewed from the direction perpendicular to the adhesive surface 4, the center of the opening can be the center of gravity of the opening when viewed from the direction.
- the through holes 3 are regularly arranged. More specifically, the through holes 3 in the example are regularly arranged such that the center of each opening is located at a position corresponding to an intersection (lattice point) of a square lattice when viewed from a direction perpendicular to the adhesive surface 4. Are arranged. However, the arrangement of the through holes 3 is not limited to this example, and the center of each opening when viewed from the direction perpendicular to the adhesive surface 4 is, for example, a rectangular lattice, an orthorhombic lattice, a rhombic lattice, a hexagonal lattice, or a hexagonal lattice.
- the through holes 3 may be provided so that the centers of the openings are at random positions when viewed from the direction perpendicular to the adhesive surface 4, but in order to suppress the variation in air permeability in the thickness direction. Are preferably regularly arranged.
- Variation in air permeability in the air-permeable pressure-sensitive adhesive sheet 1A that is, between one surface and the other surface of the air-permeable pressure-sensitive adhesive sheet 1A (in other words, between the surfaces 4A and 4B of the pressure-sensitive adhesive layer 2).
- the variation in the air permeability of) is 22% or less, which is expressed by the coefficient of variation of the air permeability.
- the air permeability is based on the air permeability measurement method B (Gurley type method) defined in JIS L1096:2010, where the effective measurement area is a predetermined value selected from 0.5 to 2.0 mm 2. It is the measured value (Gurley air permeability).
- the coefficient of variation of each characteristic indicated by the breathable pressure-sensitive adhesive sheet can be obtained from the standard deviation and average value of the values of each characteristic in at least three measurement areas.
- the measurement areas may be set to partially overlap. However, the measurement effective areas in the above-mentioned at least three measurement areas are all the same.
- the measurement of Gurley air permeability with a measurement effective area of 2.0 mm 2 is performed using a measurement jig provided with a through hole having a circular cross section with a diameter of 1.6 mm (cross section area 2.0 mm 2 ). It can.
- An example of the measuring jig is a polycarbonate disc having a thickness of 2 mm and a diameter of 47 mm with the through hole provided in the center.
- the Gurley air permeability measurement using this measurement jig can be specifically carried out as follows.
- a breathable adhesive sheet to be evaluated is fixed to one surface of the measurement jig so as to cover the opening of the through hole of the measurement jig.
- the fixing is the opening of the through hole of the measuring jig and the effective test part of the breathable adhesive sheet (when viewed from the direction perpendicular to the main surface of the fixed breathable adhesive sheet, the through hole of the measuring jig is The air passes only through the portion overlapping with the opening), and the fixed portion does not hinder the passage of the air in the effective test portion of the breathable pressure-sensitive adhesive sheet.
- the adhesive surface 4 of the breathable adhesive sheet can be used for fixing the breathable adhesive sheet.
- the measurement jig with the breathable adhesive sheet fixed was set on the Gurley type breathability tester so that the fixed surface of the breathable adhesive sheet was on the downstream side of the air flow during measurement, and 100 mL of air was passed through The time t1 for passing the adhesive sheet is measured.
- This measured value t1 can be used as the Gurley air permeability with a measurement effective area of 2.0 mm 2 .
- the Gurley air permeability can be measured with the measurement effective area being another value, for example, by using the above-mentioned measurement jig provided with a through hole having a cross-sectional area having the other value.
- the variation of the air permeability in the thickness direction of the air-permeable pressure-sensitive adhesive sheet 1A is 20% or less, 15% or less, 13% or less, 12% or less, and further 10% or less, as expressed by the coefficient of variation of the air permeability. It may be.
- the lower limit of the variation in the air permeability in the thickness direction of the air-permeable pressure-sensitive adhesive sheet 1A is, for example, 0.1% or more, and may be 1% or more, which is represented by the variation coefficient of the air permeability.
- Air permeability in the thickness direction of breathable pressure-sensitive adhesive sheet 1A is the air permeability measured effective area was 2.0 mm 2, i.e., the measured effective area as 2.0 mm 2, JIS L1096: defined in 2010 breathability It is, for example, 100 seconds/100 mL or less when expressed by the Gurley air permeability measured according to the property measurement method B (Gurley type method), and depending on the structure of the air-permeable pressure-sensitive adhesive sheet, 80 seconds/100 mL or less, 60 seconds. /100 mL or less, 50 seconds/100 mL or less, 40 seconds/100 mL or less, and further 30 seconds/100 mL or less.
- the lower limit of the Gurley air permeability in the breathable pressure-sensitive adhesive sheet 1A is, for example, 1.0 second/100 mL or more.
- the breathable pressure-sensitive adhesive sheet 1A usually has no in-plane breathability.
- the pressure-sensitive adhesive strength of the pressure-sensitive adhesive surface 4 of the breathable pressure-sensitive adhesive sheet 1A is indicated by a 180° peeling pressure-sensitive adhesive strength measured in accordance with the pressure-sensitive adhesive strength test method 1 defined in JIS Z0237:2009. It is 10 mm or more, and may be 2.0 N/10 mm or more, 4.0 N/10 mm or more, 5.0 N/10 mm or more, and further 7.0 N/10 mm or more, depending on the configuration of the breathable pressure-sensitive adhesive sheet.
- the upper limit of the adhesive force of the adhesive surface 4 in the breathable adhesive sheet 1A is, for example, 30 N/10 mm or less, which is expressed by the above 180° peeling adhesive force.
- the pressure-sensitive adhesive strength of each pressure-sensitive adhesive surface 4 may be substantially the same or different. .. In the present specification, when the 180° peeling adhesive strength remains within 0.2 N/10 mm, the adhesive strength is substantially the same.
- the breathable pressure-sensitive adhesive sheet has two pressure-sensitive adhesive surfaces 4, at least one pressure-sensitive adhesive surface 4, preferably both pressure-sensitive adhesive surfaces 4, may satisfy the above range of pressure-sensitive adhesive strength.
- the variation in the adhesive force of the adhesive surface 4 in the breathable adhesive sheet 1A is, for example, 12% or less, which is represented by the coefficient of variation of the 180° peeling adhesive force, and 10% or less depending on the configuration of the breathable adhesive sheet. , 8.0% or less, 7.0% or less, and further 6.0% or less.
- the lower limit of the variation in the adhesive force of the adhesive surface 4 in the breathable adhesive sheet 1A is, for example, 0.5% or more, which is represented by the coefficient of variation of the 180° peeling adhesive force.
- the variation in the pressure-sensitive adhesive strength on each pressure-sensitive adhesive surface 4 may be substantially the same or different. Good.
- the variation coefficient remains within 1%, it is assumed that the variations in adhesive force are substantially the same.
- the breathable pressure-sensitive adhesive sheet has two pressure-sensitive adhesive surfaces 4, at least one pressure-sensitive adhesive surface 4, preferably both pressure-sensitive adhesive surfaces 4, may satisfy the above-mentioned variation in pressure-sensitive adhesive strength.
- the shape of the breathable pressure-sensitive adhesive sheet 1A is typically a polygon including a square and a rectangle, a circle, an ellipse, or a strip when viewed in a direction perpendicular to the pressure-sensitive adhesive surface 4.
- the shape of the breathable adhesive sheet 1A is not limited to these examples.
- the air-permeable pressure-sensitive adhesive sheet 1A is suitable for use on an adherend having a small-area attachment surface (the surface to which the air-permeable adhesive sheet 1A is attached).
- the adherend having a small area may be a micro electro mechanical system (hereinafter referred to as “MEMS”).
- MEMS micro electro mechanical system
- MEMS are very small devices with a size of 1 mm square, even small devices are becoming increasingly important in recent years as devices that can be incorporated into various products to make them highly functional and add value. ing.
- MEMS there is a non-enclosed product having a ventilation hole on the surface of the package.
- non-enclosed MEMS examples include various sensors that detect atmospheric pressure, humidity, gas, air flow, etc., and electroacoustic conversion elements such as speakers and microphones.
- the breathable pressure-sensitive adhesive sheet 1A can be used for an adherend having a larger area.
- the area of the breathable pressure-sensitive adhesive sheet 1A is, for example, 2.0 mm 2 to 10000 cm 2 .
- the area of the breathable pressure-sensitive adhesive sheet 1A (for example, the breathable pressure-sensitive adhesive sheet 1A for MEMS), which is supposed to be used for an adherend having a small surface area such as MEMS, may be 100 mm 2 or less, and may be 75 mm. It may be 2 or less, 50 mm 2 or less, 25 mm 2 or less, and further 10 mm 2 or less.
- the thickness of the breathable pressure-sensitive adhesive sheet 1A is, for example, 10 to 100 ⁇ m, and may be 20 to 80 ⁇ m, further 30 to 50 ⁇ m.
- the breathable pressure-sensitive adhesive sheet 1A shown in FIGS. 1A and 1B is a single-layer breathable pressure-sensitive adhesive sheet composed of a pressure-sensitive adhesive layer 2, and the thickness of the pressure-sensitive adhesive layer 2 is usually the thickness of the breathable pressure-sensitive adhesive sheet 1A. Is the same as The thickness of the breathable pressure-sensitive adhesive sheet does not include the thickness of the release liner described later.
- the adhesive layer 2 is, for example, an acrylic adhesive layer, a silicone adhesive layer, a urethane adhesive layer, or a rubber adhesive layer.
- the pressure-sensitive adhesive layer 2 is not limited to these examples. From the viewpoint that the through holes 3 can be formed more reliably in the production method described below, the pressure-sensitive adhesive layer 2 is preferably an acrylic pressure-sensitive adhesive layer or a silicone pressure-sensitive adhesive layer, and more preferably an acrylic pressure-sensitive adhesive layer.
- the pressure-sensitive adhesive (pressure-sensitive adhesive composition) contained in the pressure-sensitive adhesive layer 2 may be a known pressure-sensitive adhesive.
- the acrylic pressure-sensitive adhesive contained in the acrylic pressure-sensitive adhesive layer is, for example, the pressure-sensitive adhesive disclosed in JP-A-2005-105212.
- the silicone-based pressure-sensitive adhesive contained in the silicone-based pressure-sensitive adhesive layer is, for example, the pressure-sensitive adhesive disclosed in JP-A-2003-313516 (including those disclosed as comparative examples).
- the pressure-sensitive adhesive layer 2 may include an ultraviolet absorber (hereinafter, referred to as “UVA”)
- UVA ultraviolet absorber
- the UVA that can be contained in the pressure-sensitive adhesive layer 2 is preferably a low-molecular UVA having a molecular weight of 10,000 or less, because it has good dispersion in the pressure-sensitive adhesive.
- the molecular weight of UVA may be 8000 or less, 5000 or less, 3000 or less, 1500 or less, 1000 or less, and further 900 or less.
- the lower limit of the molecular weight of UVA is 100 or more, for example.
- UVA can be selected from various known UVAs such as triazine-based, benzotriazole-based, and benzophenone-based UVA.
- the content of UVA in the pressure-sensitive adhesive layer 2 is, for example, 0.5 to 5% by weight, and may be 1 to 4% by weight, further 1.5 to 3% by weight. In these ranges, the formation of the pressure-sensitive adhesive layer 2 in the manufacturing method described later becomes more reliable while suppressing the decrease in the pressure-sensitive adhesive force on the pressure-sensitive adhesive surface 4.
- the breathable pressure-sensitive adhesive sheet 1A may further include other members and/or layers other than those described above, if necessary.
- the other member is, for example, a release liner arranged on the adhesive surface 4.
- the release liner can protect the adhesive surface 4 of the breathable adhesive sheet 1A.
- the breathable pressure-sensitive adhesive sheet 1A has a strip shape, the breathable pressure-sensitive adhesive sheet 1A can be wound by arranging the release liner on the pressure-sensitive adhesive surface 4, and the windable pressure-sensitive adhesive sheet 1A that is a wound body can be manufactured. ..
- An example of the breathable pressure-sensitive adhesive sheet 1A further including a release liner is shown in FIG. In the breathable pressure-sensitive adhesive sheet 1A of FIG.
- release liners 8A and 8B are arranged on both pressure-sensitive adhesive surfaces 4 (the surfaces 4A and 4B of the pressure-sensitive adhesive layer 2) in the breathable pressure-sensitive adhesive sheet 1A shown in FIGS. 1A and 1B, respectively. ing. When the breathable pressure-sensitive adhesive sheet 1A is used, the release liners 8A and 8B are normally peeled off.
- the material forming the release liners 8A and 8B is, for example, paper, metal, resin, or a composite material thereof.
- the metal is, for example, stainless steel or aluminum.
- the resin is, for example, polyester such as polyethylene terephthalate (PET), or polyolefin such as polyethylene (PE) and polypropylene (PP).
- PET polyethylene terephthalate
- PP polypropylene
- the thickness of the release liners 8A and 8B is, for example, 1 to 200 ⁇ m.
- the surface of the release liners 8A and 8B that is in contact with the adhesive surface 4 may be subjected to a release treatment that improves the releasability of the release liners 8A and 8B from the adhesive surface 4.
- the pressure-sensitive adhesive composition is applied to the surface of the release sheet 52, and the applied pressure-sensitive adhesive composition is dried and/or cured to laminate the precursor layer 53 of the pressure-sensitive adhesive layer 2 and the release sheet 52.
- Form body 51 (FIG. 3A).
- the material forming the release sheet 52 is, for example, the material exemplified above as the material forming the release liners 8A and 8B.
- the resin forming the release sheet 52 may be a resin having excellent release properties such as a fluororesin such as polytetrafluoroethylene (PTFE) and a polyimide resin.
- the material forming the release sheet 52 is not limited to these examples.
- the surface of the release sheet 52 on which the precursor layer 53 is formed may be subjected to a release treatment for improving the releasability of the pressure-sensitive adhesive layer 2 from the release sheet 52.
- the type and thickness of the pressure-sensitive adhesive composition to be applied can be selected according to the pressure-sensitive adhesive layer 2 to be formed. Known methods can be applied to the application, drying and curing of the pressure-sensitive adhesive composition.
- the laminated body 51 is irradiated with the laser 54 to form the through holes 3 (FIGS. 3B and 3C).
- the pressure-sensitive adhesive layer 2 is formed from the precursor layer 53, and the laminate 55 of the release sheet 52 and the pressure-sensitive adhesive layer 2 is formed.
- the through holes 3 are formed by the decomposition of molecules such as adhesive molecules contained in the precursor layer 53, and the modified region due to the heat given by the laser 54 (typically The formation of a region in which the crosslinking of the pressure-sensitive adhesive molecule has progressed).
- the modification does not proceed further in the region to form the through hole 3.
- the formation of the through hole 3 and the formation of the modified region are competitive, and therefore the influence of the modified region is not limited to the formation of the next through hole 3 adjacent to one already formed through hole 3.
- the formation of the first one through-hole 3 by the irradiation of the laser 54 When the modified region is expanded, the opening diameter of the through holes 3 and the average interval are disturbed, and the variation of the air permeability and the adhesive force is likely to increase.
- As the wavelength of the laser 54 a wavelength that is easily absorbed by the pressure-sensitive adhesive molecules contained in the precursor layer 53 is selected.
- the formation rate of the through holes 3 can be relatively increased as compared with the formation rate of the modified region, and the formation of the through holes 3 can be preferentially advanced.
- the pressure-sensitive adhesive molecules contained in the acrylic pressure-sensitive adhesive and the silicone pressure-sensitive adhesive relatively well absorb ultraviolet light having a wavelength of 360 nm or less. Therefore, an ultraviolet laser can be selected as the laser 54.
- the ultraviolet laser is, for example, a UV-YAG laser (wavelength 355 nm), a DUV-YAG laser (wavelength 266 nm), or an excimer laser (wavelength 248 nm).
- -A composition containing a laser absorber is selected as the adhesive composition.
- the formation rate of the through holes 3 can be relatively increased as compared with the formation rate of the modified region, and the formation of the through holes 3 can be preferentially advanced.
- the laser absorber is UVA, for example. Examples of the type and content of UVA are as described above.
- the shot time of the laser 54 for forming one through hole 3 is made as short as possible. This is because the formation of the modified region progresses as the shot time becomes longer.
- the above-described selection of the wavelength of the laser 54 and the laser absorbent further enables the shot time of the laser 54 to be shortened.
- a nanosecond laser, a femtosecond laser, or the like capable of high energy irradiation in a short shot time can be selected as the light source of the laser 54.
- the through holes 56 may be formed integrally with the release sheet 52, or the through holes 3 may be formed only in the precursor layer 53. May be formed.
- the release sheet 52 is peeled off from the laminate 55 to obtain the breathable adhesive sheet 1A shown in FIGS. 1A and 1B (FIG. 3D).
- the breathable pressure-sensitive adhesive sheet 1A may be circulated in the state of the laminate 55 without using the release sheet 52 as a release liner, for example, using the release sheet 52 as a release liner. Further, by laminating a release liner 8A and/or 8B on the adhesive surface 4A and/or 4B of the adhesive layer 2 obtained by peeling off the release sheet 52, it is circulated as a breathable adhesive sheet 1A having a release liner. You can also
- the breathable pressure-sensitive adhesive sheet 1A can be used, for example, by sticking it to the sticking surface of an adherend having breathability on the sticking surface.
- the breathable pressure-sensitive adhesive sheet 1A may be for a breathable adherend having a sticking surface having breathability.
- the air permeability of the adherend is, for example, the air permeability between the surface and the inside of the adherend through the opening of the attaching surface.
- the opening is, for example, a ventilation hole provided on the attachment surface, and in this case, the adherend has the ventilation property of the ventilation hole.
- the air permeability of the adherend may be that of the mother structure of the adherend itself such as a porous structure.
- the breathable adherend is, for example, a portion excluding the breathable pressure-sensitive adhesive sheet of the present invention in the breathable product described below.
- the breathable adherend is not limited to those exemplified in this specification.
- the breathable pressure-sensitive adhesive sheet 1A may be for MEMS.
- the breathable pressure-sensitive adhesive sheet 1A for MEMS can be used, for example, by sticking the surface of the MEMS package as the sticking surface to the sticking surface.
- the air-permeable pressure-sensitive adhesive sheet 1A may be used by sticking it to the sticking surface with the surface provided with the vent hole in the non-hermetically-sealed MEMS as the sticking surface. In this case, it is expected that the function of the MEMS based on the ventilation through the ventilation hole can be secured even after the air-permeable pressure-sensitive adhesive sheet 1A is attached to the above-mentioned attachment surface.
- the breathable pressure-sensitive adhesive sheet 1A may be used for applications that are not exposed to light including ultraviolet light, for example, sunlight. However, the use of the breathable pressure-sensitive adhesive sheet 1A is not limited to the above-mentioned examples. The breathable pressure-sensitive adhesive sheet 1A can be used for any purpose.
- FIGS. 4A and 4B The breathable pressure-sensitive adhesive sheet of Embodiment 2 is shown in FIGS. 4A and 4B.
- FIG. 4B shows a cross section BB of the breathable pressure-sensitive adhesive sheet 1 (1B) of FIG. 4A.
- the breathable pressure-sensitive adhesive sheet 1B has a laminated structure of a pressure-sensitive adhesive layer 2 having a first through hole 3 extending in the thickness direction and a base material 6 having a second through hole 5 extending in the thickness direction. It is an adhesive sheet.
- the pressure-sensitive adhesive layer 2 is arranged on the surface 7A on one side of the base material 6.
- the through hole 3 of the pressure-sensitive adhesive layer 2 and the through hole 5 of the base material 6 communicate with each other.
- the air-permeable pressure-sensitive adhesive sheet 1B has air permeability in the thickness direction due to the through holes 3 and 5.
- the one surface 4A of the pressure-sensitive adhesive layer 2 constitutes the pressure-sensitive adhesive surface 4.
- the breathable pressure-sensitive adhesive sheet 1B is a single-sided pressure-sensitive adhesive sheet including the base material 6.
- the breathable pressure-sensitive adhesive sheet 1B can have the same configuration and characteristics as the breathable pressure-sensitive adhesive sheet 1A of the first embodiment except that it is a single-sided pressure-sensitive adhesive sheet including the base material 6.
- the pressure-sensitive adhesive layer 2 of the breathable pressure-sensitive adhesive sheet 1B can have the same configuration and characteristics as the pressure-sensitive adhesive layer 2 of the breathable pressure-sensitive adhesive sheet 1A. Description that overlaps with the breathable pressure-sensitive adhesive sheet 1A of Embodiment 1 will be omitted.
- the air-permeable pressure-sensitive adhesive sheet 1B at least a part of the through holes 5 of the base material 6 may communicate with the through holes 3 of the pressure-sensitive adhesive layer 2. According to the manufacturing method described below, it is possible to manufacture the breathable pressure-sensitive adhesive sheet 1B in which all the through holes 5 of the base material 6 communicate with the through holes 3 of the pressure-sensitive adhesive layer 2.
- At least one selected from the configuration of the through holes 5, for example, the extending direction of the through holes 5, the shape of the openings, the average opening diameter, the average interval, and the arrangement corresponds to each of the through holes 3 described above in the description of the first embodiment.
- the above-mentioned at least one configuration in the through-hole 5 of the breathable pressure-sensitive adhesive sheet 1B may be the same as the corresponding configuration in the through-hole 3, and the same breathable pressure-sensitive adhesive sheet 1B is manufactured by the manufacturing method described below. It is possible.
- the material forming the base material 6 is, for example, paper, metal, resin, or a composite material thereof.
- the resin is, for example, a polyolefin resin such as PE or PP, a polyester resin such as PET, a polyimide resin, or a fluororesin such as PTFE.
- the material forming the base material 6 is not limited to these examples.
- the thickness of the base material 6 is, for example, 1 to 100 ⁇ m, and may be 5 to 80 ⁇ m, or even 10 to 30 ⁇ m.
- the thickness of the pressure-sensitive adhesive layer 2 in the breathable pressure-sensitive adhesive sheet 1B is, for example, 1 to 100 ⁇ m, may be 5 to 80 ⁇ m, and may be 10 to 30 ⁇ m.
- the shape of the base material 6 is usually the same as the shape of the breathable adhesive sheet 1B.
- the pressure-sensitive adhesive layer 2 may be disposed on at least a part of the surface 7A of the base material 6. In the example shown in FIGS. 4A and 4B, the pressure-sensitive adhesive layer 2 is arranged on the entire surface 7A of the base material 6.
- the use of the breathable pressure-sensitive adhesive sheet 1B is the same as the use described above in the description of the breathable pressure-sensitive adhesive sheet 1A.
- the adhesive composition is applied to one surface of the original sheet 58, and the applied adhesive composition is dried and/or cured to form a laminate of the precursor layer 53 of the adhesive layer 2 and the original sheet 58. 57 is formed (FIG. 5A).
- the original sheet 58 a sheet having the same configuration as the base material 6 except that it does not have the through holes 5 can be usually selected.
- the type and thickness of the pressure-sensitive adhesive composition to be applied can be selected according to the pressure-sensitive adhesive layer 2 to be formed. Known methods can be applied to the application, drying and curing of the pressure-sensitive adhesive composition.
- the laminated body 57 is irradiated with the laser 54 to form the through holes 3 and 5 (FIGS. 5B and 5C).
- the pressure-sensitive adhesive layer 2 is formed from the precursor layer 53 by forming the through-holes 3, and the base material 6 is formed from the original sheet 58 by forming the through-holes 5 to form a laminated structure of the base material 6 and the pressure-sensitive adhesive layer 2.
- the breathable pressure-sensitive adhesive sheet 1B thus obtained is obtained.
- FIGS. 6A and 6B The breathable pressure-sensitive adhesive sheet of Embodiment 3 is shown in FIGS. 6A and 6B.
- FIG. 6B shows a cross section BB of the breathable pressure-sensitive adhesive sheet 1 (1C) of FIG. 6A.
- the breathable pressure-sensitive adhesive sheet 1C is a base material having two pressure-sensitive adhesive layers 2 (2A, 2B) having first through holes 3 extending in the thickness direction and second through holes 5 extending in the thickness direction.
- 6 is a pressure-sensitive adhesive sheet having a laminated structure with 6.
- the adhesive layers 2A and 2B are arranged on the surfaces 7A and 7B on both sides of the base material 6, respectively.
- the through hole 3 of the adhesive layer 2A and the through hole 5 of the base material 6 communicate with each other.
- the air-permeable pressure-sensitive adhesive sheet 1C has air permeability in the thickness direction due to the through holes 3 and 5.
- the one surface 4A of the pressure-sensitive adhesive layer 2A and the one surface 4B of the pressure-sensitive adhesive layer 2B constitute the pressure-sensitive adhesive surface 4.
- the breathable pressure-sensitive adhesive sheet 1C is a double-sided pressure-sensitive adhesive sheet including the base material 6.
- the breathable pressure-sensitive adhesive sheet 1C can have the same configuration and characteristics as the breathable pressure-sensitive adhesive sheet 1A of the first embodiment except that it is a double-sided pressure-sensitive adhesive sheet including the base material 6.
- the pressure-sensitive adhesive layers 2A and 2B and the base material 6 of the breathable pressure-sensitive adhesive sheet 1C have the same configuration and characteristics as the pressure-sensitive adhesive layer 2 of the breathable pressure-sensitive adhesive sheet 1A and the base material 6 of the breathable pressure-sensitive adhesive sheet 1B of the second embodiment, respectively.
- the air-permeable pressure-sensitive adhesive sheet 1C At least part of the through holes 5 of the base material 6 need only communicate with the through holes 3 of the pressure-sensitive adhesive layers 2A and 2B.
- the manufacturing method described later it is possible to manufacture the breathable pressure-sensitive adhesive sheet 1C in which all the through holes 5 of the base material 6 communicate with the through holes 3 of the pressure-sensitive adhesive layers 2A and 2B.
- a structure is formed between the through-holes 3 of the pressure-sensitive adhesive layer 2A and the through-holes 3 of the pressure-sensitive adhesive layer 2B, for example, the extending direction of the through-holes 3, the shape of the opening, the average opening diameter, and the average.
- At least one selected from the spacing and the arrangement may be the same, and the same breathable pressure-sensitive adhesive sheet 1C can be manufactured by the manufacturing method described below.
- the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 2A and the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 2B may be the same or different.
- the shape of the base material 6 is usually the same as the shape of the breathable adhesive sheet 1C.
- the pressure-sensitive adhesive layers 2A and 2B may be arranged on at least a part of the surfaces 7A and 7B of the base material 6, respectively. In the example shown in FIGS. 6A and 6B, the pressure-sensitive adhesive layers 2A and 2B are arranged on the entire surfaces 7A and 7B of the base material 6, respectively.
- the use of the breathable pressure-sensitive adhesive sheet 1C is the same as the use described above in the description of the breathable pressure-sensitive adhesive sheet 1A.
- the adhesive composition is applied to both surfaces of the original sheet 58, and the applied adhesive composition is dried and/or cured to give a precursor layer 53A of the adhesive layer 2A, the original sheet 58, and the adhesive.
- a laminate 59 of the precursor layer 53B of the agent layer 2B is formed (FIG. 7A).
- As the original sheet 58 a sheet having the same configuration as the base material 6 except that it does not have the through holes 5 can be usually selected.
- the type and thickness of the adhesive composition to be applied can be selected according to the adhesive layers 2A and 2B to be formed. Known methods can be applied to the application, drying and curing of the pressure-sensitive adhesive composition.
- the laminated body 59 is irradiated with the laser 54 to form the through holes 3 and 5 (FIGS. 7B and 7C).
- the pressure sensitive adhesive layers 2A and 2B are formed from the precursor layers 53A and 53B, and by forming the through hole 5, the base sheet 6 is formed from the original sheet 58, and the pressure sensitive adhesive layer 2A, the base material 6 and A breathable pressure-sensitive adhesive sheet 1C having a laminated structure of the pressure-sensitive adhesive layer 2B is obtained.
- Irradiation of the laser 54 to the laminate 59 can be performed from any side of the precursor layer 53A side and the precursor layer 53B side.
- the precursor layer located on the side to be irradiated with the laser 54 is a laser layer. It is preferred to include an absorber such as UVA.
- an absorber such as UVA.
- the material forming the original sheet 58 is polyimide, the action of the laser 54 on the original sheet 58 is stronger than that on the precursor layer 53. As a result, the decomposition of the original sheet 58 may proceed more strongly than the formation of the through holes 3 by the laser 54.
- the decomposed products of the original sheet 58 are deposited inside the laminated body 59, so that the formation of the through holes 5 becomes uneven, and in an extreme example, the through holes 5 may be penetrated.
- the carbonization of the original sheet 58 progresses without forming the holes 5 and the breathable pressure-sensitive adhesive sheet 1C cannot be obtained.
- the precursor layer 53 located on the side irradiated with the laser 54 contains a laser absorbent, so that the decomposition of the precursor layer 53 proceeds more strongly than the decomposition of the original sheet 58, and the through holes 3 are quickly formed.
- Both precursor layers 53A and 53B may contain a laser absorber.
- either or both of the pressure-sensitive adhesive layer 2A and the pressure-sensitive adhesive layer 2B may contain a laser absorber.
- FIG. 8A An example of a breathable product of the present invention is shown in Figure 8A.
- the breathable product 11 shown in FIG. 8A includes a housing 14 having a vent 13.
- the vent hole 13 is an opening provided on the surface 12 of the housing 14.
- the breathable product 11 further includes the breathable pressure-sensitive adhesive sheet 1 of the present invention.
- the air-permeable pressure-sensitive adhesive sheet 1 is attached and bonded to the surface 12 so as to cover the air vent 13.
- the breathable product 11 can be vented 15 through the vent 13 and the breathable adhesive sheet 1.
- the surface 12 is provided with one vent 13 and no openings other than the vent 13 are provided.
- the number of ventilation holes 13 provided on the surface 12 is not limited.
- the area of the surface 12 is, for example, 2.0 mm 2 to 10000 mm 2 .
- the area of the surface 12 may be 100 mm 2 or less, 75 mm 2 or less, 50 mm 2 or less, 25 mm 2 or less, and further 10 mm 2 or less.
- the ratio of the area of the breathable adhesive sheet 1 to the area of the surface 12 is, for example, 0.01 to 90%, and may be 0.1 to 70%, or 1 to 50%.
- the breathable product 11 is, for example, an unsealed MEMS.
- An example of the non-enclosed MEMS is as described above.
- the breathable product 11 is not limited to this example.
- FIG. 8B Another example of the breathable product of the present invention is shown in FIG. 8B.
- the breathable product 21 shown in FIG. 8B includes a porous base material 22 and the breathable pressure-sensitive adhesive sheet 1 of the present invention attached to the surface 23 of the porous base material 22.
- the breathable pressure-sensitive adhesive sheet 1 is attached and bonded to the surface 23 so as to cover the entire surface 23.
- the breathable pressure-sensitive adhesive sheet 1 may be attached to the surface 23 so as to cover at least a part of the surface 23.
- the porous base material 22 has air permeability (air permeability passing through the surface 23) based on the porous structure which is the mother structure of the base material 22.
- the breathable product 21 can be vented 24 through the porous substrate 22 and the breathable pressure-sensitive adhesive sheet 1. In the breathable product 21, even when the surface 23 and the area of the breathable pressure-sensitive adhesive sheet 1 are small, it is possible to obtain good characteristics such as air-permeability based on the breathable pressure-sensitive adhesive sheet 1.
- the area of the surface 23 is, for example, 2.0 mm 2 to 10000 mm 2 .
- the area of the surface 23 may be 100 mm 2 or less, 75 mm 2 or less, 50 mm 2 or less, 25 mm 2 or less, and further 10 mm 2 or less.
- the ratio of the area of the breathable adhesive sheet 1 to the area of the surface 23 is, for example, 1.0 to 100%.
- the lower limit of the ratio may be 5.0% or more, and further 10% or more.
- the upper limit of the ratio may be 99% or less, 98% or less, and further 95% or less.
- the porous base material 22 is, for example, a stretched porous sheet of resin such as a PTFE porous sheet; a binding sheet of resin particles such as a binding sheet of ultra high molecular weight polyethylene (UHMWPE) particles; fibers such as nonwoven fabric and woven fabric.
- Base material an expanded sheet, a punching sheet, a porous sheet made of metal and/or resin such as mesh and net.
- the porous base material 22, which is a stretched porous sheet, a binding sheet, or a fiber base material usually has micropores communicating with each other throughout its entirety, and has air permeability based on the micropores.
- the hole in the porous sheet usually connects one surface 23 and the other surface of the porous substrate 22 and is, for example, a through hole extending in a direction perpendicular to the surface 23.
- the breathable product 21 is, for example, a ventilation member and a sound-transmitting member used for information devices such as smartphones, tablet PCs, and electric shavers, portable devices, electronic devices, and electric products.
- the porous base material 22 may be a breathable film and a sound-permeable film, respectively.
- the ventilation member and the sound-passing member may be waterproof.
- the breathable product 21 is not limited to these examples.
- the average opening diameter of the through-holes in the pressure-sensitive adhesive layer was evaluated by image analysis of an SEM observation image of the surface (adhesive surface) of the pressure-sensitive adhesive layer to be evaluated. Incidentally, in evaluating the average opening diameter and the variation in the opening diameter, the openings of the three through holes existing on the adhesive surface were randomly extracted.
- the average spacing of the through-holes in the pressure-sensitive adhesive layer was evaluated by image analysis of an SEM observation image of the surface (adhesive surface) of the pressure-sensitive adhesive layer to be evaluated. Incidentally, in evaluating the average interval, the openings of the six through holes existing on the adhesive surface were randomly extracted.
- the air permeability (Gurley air permeability) in the thickness direction of the air-permeable pressure-sensitive adhesive sheet is based on the air permeability measurement method B (Gurley type method) defined in JIS L1096:2010 with a measurement effective area of 2.0 mm 2. It evaluated by the method of.
- the variation in the air permeability in the thickness direction of the air-permeable pressure-sensitive adhesive sheet is based on the air-permeable measurement B method (Gurley type method) defined in JIS L1096:2010 with the measurement effective area being 2.0 mm 2. From the standard deviation and average value of the Gurley air permeability determined by, the coefficient of variation of the Gurley air permeability was evaluated. In addition, in order to obtain the standard deviation and the average value of the Gurley air permeability, three measurement areas were set on the air-permeable pressure-sensitive adhesive sheet to be evaluated.
- the adhesive strength (180° peeling adhesive strength) of the adhesive surface of the breathable adhesive sheet was evaluated in accordance with the adhesive strength test method 1 defined in JIS Z0237:2009.
- the variation in the adhesive strength of the adhesive surface of the breathable adhesive sheet is 180° from the standard deviation and the average value of the 180° peeling adhesive strength determined in accordance with the adhesive strength test method 1 defined in JIS Z0237:2009. Peeling was evaluated as a coefficient of variation in adhesive strength. In addition, in order to obtain the standard deviation and the average value of the 180° peeling adhesive strength, three measurement areas were set on the adhesive surface of the breathable adhesive sheet to be evaluated.
- Example 1 a single-layer breathable pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer having through holes extending in the thickness direction was produced by the manufacturing method shown in FIGS. 3A to 3D.
- the acrylic pressure-sensitive adhesive composition was applied to the surface of the PET sheet, and the applied pressure-sensitive adhesive composition was dried to form a laminate of the precursor layer (thickness 20 ⁇ m) and the PET sheet.
- the pressure-sensitive adhesive composition was selected by adding 2 parts by weight of UVA (Tinuvin 326 manufactured by BASF) to 100 parts by weight of the composition disclosed in JP-A-2005-105212.
- a die coater was used to apply the pressure-sensitive adhesive composition to the surface of the PET sheet.
- the drying conditions of the applied pressure-sensitive adhesive composition were 100° C. and 10 minutes.
- a pressure-sensitive adhesive layer having through holes extending in the thickness direction was formed from the precursor layer.
- a UV-YAG laser (Specron-Physics, Talon), which is a pulsed ultraviolet laser, was selected as the laser.
- laser irradiation is performed by a scanning method using a galvano scanner so that the center of the opening of each formed through hole is located at the position corresponding to the intersection of the square lattice when viewed from the direction perpendicular to the adhesive surface.
- the laser was irradiated so that the average distance between the through holes was 100 ⁇ m.
- the laser shot time for forming one through hole was 20 nanoseconds.
- the formed pressure-sensitive adhesive layer was peeled off from the PET sheet to obtain the breathable pressure-sensitive adhesive sheet of Example 1.
- the average opening diameter of the through-holes in the formed pressure-sensitive adhesive layer, the variation in the opening diameter and the average spacing, and the pressure-sensitive adhesive force of the breathable pressure-sensitive adhesive sheet and the variation in the pressure-sensitive adhesive layer are peeled from the PET sheet. Evaluated without.
- the air permeability in the thickness direction of the breathable pressure-sensitive adhesive sheet and the variation in the air permeability in the thickness direction were evaluated in a state where the pressure-sensitive adhesive layer was peeled from the PET sheet.
- Example 2 was the same as Example 1 except that the thickness of the precursor layer formed on the surface of the PET sheet was 60 ⁇ m, and a single layer consisting of a pressure-sensitive adhesive layer having through holes extending in the thickness direction was formed. A breathable pressure-sensitive adhesive sheet was prepared.
- Comparative Example 1 a single-layer breathable pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer having through holes extending in the thickness direction was prepared in the same manner as in Example 1 except that UVA was not added to the pressure-sensitive adhesive composition. It was made.
- Comparative example 2 In Comparative Example 2, the thickness of the precursor layer formed on the surface of the PET sheet was 10 ⁇ m, and the UVA was not added to the pressure-sensitive adhesive composition in the same manner as in Example 1 in the thickness direction. A single-layer breathable pressure-sensitive adhesive sheet composed of a pressure-sensitive adhesive layer having extended through holes was produced.
- Example 3 has a laminated structure of a pressure-sensitive adhesive layer having through holes extending in the thickness direction and a base material having through holes extending in the thickness direction by the manufacturing method shown in FIGS. 5A to 5C.
- a breathable pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer arranged on one surface of the substrate was prepared.
- an acrylic pressure-sensitive adhesive composition is applied to one surface of a polyimide sheet (thickness 12 ⁇ m) which is an original sheet, and the applied pressure-sensitive adhesive composition is dried to form a precursor layer (thickness 20 ⁇ m) and a polyimide.
- a laminate with a sheet was formed.
- the composition containing UVA used in Example 1 was used as the adhesive composition.
- a die coater was used to apply the pressure-sensitive adhesive composition to the surface of the polyimide sheet.
- the drying conditions of the applied pressure-sensitive adhesive composition were the same as in Example 1.
- a through hole is integrally formed in the precursor layer and the raw film, and a pressure-sensitive adhesive having a through hole extending in the thickness direction.
- the breathable pressure-sensitive adhesive sheet of Example 3 having a laminated structure (two-layer structure) of a layer and a substrate having a through hole extending in the thickness direction and communicating with the through hole of the pressure-sensitive adhesive layer was obtained.
- the type of laser to be irradiated and the laser irradiation conditions were the same as in Example 1.
- Example 4 has a laminated structure of a pressure-sensitive adhesive layer having through holes extending in the thickness direction and a base material having through holes extending in the thickness direction by the manufacturing method shown in FIGS. 7A to 7C.
- a breathable pressure-sensitive adhesive sheet having pressure-sensitive adhesive layers arranged on both sides of the substrate was prepared.
- an acrylic pressure-sensitive adhesive composition is applied to both surfaces of a polyimide sheet (thickness 12 ⁇ m) which is an original sheet, and the applied pressure-sensitive adhesive composition is dried to give a precursor layer (thickness 20 ⁇ m)/polyimide.
- a laminate of sheet/precursor layer (thickness 20 ⁇ m) was formed.
- the composition containing UVA used in Example 1 was used as the adhesive composition.
- a die coater was used to apply the pressure-sensitive adhesive composition to the surface of the polyimide sheet.
- the drying conditions of the applied pressure-sensitive adhesive composition were the same as in Example 1.
- Example 4 Next, by irradiating the formed laminate with a laser from one precursor layer side, through holes are integrally formed in the precursor layer and the original film, and the through holes extend in the thickness direction.
- the breathable pressure-sensitive adhesive sheet of Example 4 having a laminated structure (three-layer structure) of a pressure-sensitive adhesive layer and a substrate having through holes extending in the thickness direction and communicating with the through holes of the pressure-sensitive adhesive layer was obtained.
- the type of laser to be irradiated and the laser irradiation conditions were the same as in Example 1.
- Example 5 In Example 5, the pressure-sensitive adhesive layer having through holes extending in the thickness direction and the adhesive layer having the through holes extending in the thickness direction were formed in the same manner as in Example 3 except that the laser was irradiated so that the average distance between the through holes was 40 ⁇ m.
- Comparative example 3 In Comparative Example 3, an adhesive layer having through holes extending in the thickness direction and through holes extending in the thickness direction were prepared in the same manner as in Example 4 except that UVA was not added to the adhesive composition. An attempt was made to fabricate a breathable pressure-sensitive adhesive sheet having a laminated structure with a base material having a pressure sensitive adhesive layer on both sides of the base material. However, the carbonization of the raw film progressed before the through holes were formed in the precursor layer by the laser irradiation, and the breathable pressure-sensitive adhesive sheet could not be produced.
- the breathable pressure-sensitive adhesive sheet of the present invention can be used, for example, by sticking it to the surface of an adherend having air permeability on the surface. According to the breathable pressure-sensitive adhesive sheet of the present invention, it is expected that the air permeability of the adherend can be ensured even after being attached to the surface.
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Abstract
Description
厚さ方向の通気性を有する通気性粘着シートであって、
厚さ方向に延びた第1の貫通孔を有する粘着剤層を備え、
前記粘着剤層の少なくとも一方の面が粘着面を構成し、
前記貫通孔の平均開口径が1.0~50μmであり、
前記貫通孔の平均間隔が5~400μmであり、
厚さ方向の通気度のばらつきが、測定有効面積を0.5~2.0mm2から選ばれる所定の値として日本工業規格(以下、「JIS」と記載する)L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠して測定した空気透過度の変動係数により表示して、22%以下である、通気性粘着シート、
を提供する。
開口を有する表面を有し、前記表面において前記開口を介した通気性を有する通気性製品であって、
前記開口を覆うように前記表面に貼付された通気性粘着シートをさらに備え、
前記通気性粘着シートが、上記本発明の通気性粘着シートである通気性製品、
を提供する。
多孔質基材と、前記多孔質基材の表面に貼付された通気性粘着シートとを備え、
前記通気性粘着シートが、上記本発明の通気性粘着シートである通気性製品、
を提供する。
(実施形態1)
実施形態1の通気性粘着シートを図1A及び図1Bに示す。図1Bには、図1Aの通気性粘着シート1(1A)の断面B-Bを示す。通気性粘着シート1Aは、厚さ方向に延びた第1の貫通孔3を有する粘着剤層2からなる単層の粘着シートである。通気性粘着シート1Aは、貫通孔3により、厚さ方向の通気性を有する。また、通気性粘着シート1Aでは、粘着剤層2の双方の面4A,4Bが粘着面4を構成している。通気性粘着シート1Aは、基材レスの両面粘着シートである。個々の貫通孔3は、通常、互いに独立している。
(2)前駆体層53にレーザー54を照射すると、粘着剤分子等の前駆体層53に含まれる分子の分解による貫通孔3の形成と、レーザー54により与えられた熱による変性領域(典型的には、粘着剤分子の架橋が進行した領域)の形成とが進行する。ここで、変性領域が形成された後に当該領域において変性がさらに進んで貫通孔3が形成されるわけではないことに注意が必要である。寧ろ、一度変性領域が形成されると、当該領域では貫通孔3の均一な形成が難しくなる。また、貫通孔3の形成と変性領域の形成とは競合的であり、このために変性領域の影響は、既に形成したある一つの貫通孔3に隣接する次の貫通孔3の形成だけではなく、レーザー54の照射による最初の一つの貫通孔3の形成にも及ぶ。変性領域が拡大すると、貫通孔3の開口径及び平均間隔の乱れや、通気度及び粘着力のばらつきの増大が生じやすくなる。
レーザー54の照射による変性領域の形成を抑えるために、例えば:
・レーザー54の波長として、前駆体層53に含まれる粘着剤分子が吸収しやすい波長を選択する。これにより、変性領域の形成速度に比べて貫通孔3の形成速度を相対的に向上でき、貫通孔3の形成を優先的に進めることが可能となる。アクリル系粘着剤及びシリコーン系粘着剤に含まれる粘着剤分子は、波長360nm以下の紫外光を比較的よく吸収する。このため、レーザー54として紫外光レーザーを選択することができる。紫外光レーザーは、例えば、UV-YAGレーザー(波長355nm)、DUV-YAGレーザー(波長266nm)、エキシマレーザー(波長248nm)である。
・粘着剤組成物として、レーザー吸収剤を含む組成物を選択する。レーザー吸収剤の含有により、変性領域の形成速度に比べて貫通孔3の形成速度を相対的に向上でき、貫通孔3の形成を優先的に進めることが可能となる。レーザー吸収剤は、例えばUVAである。UVAの種類及び含有量の例は上述のとおりである。
・1つの貫通孔3を形成するためのレーザー54のショット時間をできるだけ短くする。ショット時間が長くなると、変性領域の形成が進行するためである。上述したレーザー54の波長の選択及びレーザー吸収剤により、レーザー54のショット時間の短縮がさらに可能となる。また、短いショット時間において高エネルギーの照射が可能であるナノ秒レーザー、フェムト秒レーザー等をレーザー54の光源として選択することができる。
実施形態2の通気性粘着シートを図4A及び図4Bに示す。図4Bには、図4Aの通気性粘着シート1(1B)の断面B-Bを示す。通気性粘着シート1Bは、厚さ方向に延びた第1の貫通孔3を有する粘着剤層2と、厚さ方向に延びた第2の貫通孔5を有する基材6との積層構造を有する粘着シートである。粘着剤層2は、基材6の片側の面7Aに配置されている。粘着剤層2の貫通孔3と、基材6の貫通孔5とは連通している。通気性粘着シート1Bは、貫通孔3及び貫通孔5により、厚さ方向の通気性を有する。また、通気性粘着シート1Bでは、粘着剤層2の一方の面4Aが粘着面4を構成している。通気性粘着シート1Bは、基材6を備える片面粘着シートである。
実施形態3の通気性粘着シートを図6A及び図6Bに示す。図6Bには、図6Aの通気性粘着シート1(1C)の断面B-Bを示す。通気性粘着シート1Cは、厚さ方向に延びた第1の貫通孔3を有する2つの粘着剤層2(2A,2B)と、厚さ方向に延びた第2の貫通孔5を有する基材6との積層構造を有する粘着シートである。粘着剤層2A,2Bは、基材6の両側の面7A,7Bにそれぞれ配置されている。粘着剤層2Aの貫通孔3と基材6の貫通孔5とは連通している。また、基材6の貫通孔5と粘着剤層2Bの貫通孔3とは連通している。通気性粘着シート1Cは、貫通孔3及び貫通孔5により、厚さ方向の通気性を有する。通気性粘着シート1Cでは、粘着剤層2Aの一方の面4A及び粘着剤層2Bの一方の面4Bが粘着面4を構成している。通気性粘着シート1Cは、基材6を備える両面粘着シートである。
本発明の通気性製品(breathable product)の一例を図8Aに示す。図8Aに示す通気性製品11は、通気口13を有するハウジング14を備える。通気口13は、ハウジング14の表面12に設けられた開口である。通気性製品11は、本発明の通気性粘着シート1をさらに備えている。通気性粘着シート1は、通気口13を覆うように表面12に貼付されて接合されている。通気性製品11では、通気口13及び通気性粘着シート1を介した通気15が可能である。通気性製品11では、表面12及び通気性粘着シート1の面積が小さい場合においても、通気性粘着シート1に基づく、通気性(ventilation ability)をはじめとする良好な特性を得ることができる。なお、図8Aに示す例において、表面12には1つの通気口13が設けられており、通気口13以外の開口は設けられていない。ただし、表面12に設けられた通気口13の数は限定されない。
粘着剤層における貫通孔の平均開口径は、評価対象である粘着剤層の表面(粘着面)に対するSEMによる観察像を画像解析することにより評価した。なお、平均開口径及び開口径のばらつきを評価するにあたり、粘着面に存在する3個の貫通孔の開口をランダムに抽出した。
粘着剤層における貫通孔の平均間隔は、評価対象である粘着剤層の表面(粘着面)に対するSEMによる観察像を画像解析することにより評価した。なお、平均間隔を評価するにあたり、粘着面に存在する6個の貫通孔の開口をランダムに抽出した。
通気性粘着シートの厚さ方向の通気度(ガーレー通気度)は、測定有効面積を2.0mm2として、JIS L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠した上述の方法により評価した。
通気性粘着シートにおける厚さ方向の通気度のばらつきは、測定有効面積を2.0mm2として、JIS L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠して上述の方法により求めたガーレー通気度の標準偏差及び平均値より、ガーレー通気度の変動係数として評価した。なお、ガーレー通気度の標準偏差及び平均値を求めるために、3箇所の測定領域を評価対象である通気性粘着シートに設定した。
通気性粘着シートの粘着面の粘着力(180°引きはがし粘着力)は、JIS Z0237:2009に定められた粘着力の試験方法1に準拠して評価した。
通気性粘着シートにおける粘着面の粘着力のばらつきは、JIS Z0237:2009に定められた粘着力の試験方法1に準拠して求めた180°引きはがし粘着力の標準偏差及び平均値より、180°引きはがし粘着力の変動係数として評価した。なお、180°引きはがし粘着力の標準偏差及び平均値を求めるために、3箇所の測定領域を評価対象である通気性粘着シートの粘着面に設定した。
実施例1では、図3A~図3Dに示す製造方法により、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
実施例2では、PETシートの表面に形成した前駆体層の厚さを60μmとした以外は実施例1と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
比較例1では、粘着剤組成物に対してUVAを加えなかった以外は実施例1と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
比較例2では、PETシートの表面に形成した前駆体層の厚さを10μmとするとともに、粘着剤組成物に対してUVAを加えなかった以外は実施例1と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
実施例3では、図5A~図5Cに示す製造方法により、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の片側の面に配置されている通気性粘着シートを作製した。
実施例4では、図7A~図7Cに示す製造方法により、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の両側の面に配置されている通気性粘着シートを作製した。
実施例5では、貫通孔の平均間隔が40μmとなるようにレーザーを照射した以外は実施例3と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の片側の面に配置されている二層構造の通気性粘着シートを作製した。
比較例3では、粘着剤組成物に対してUVAを加えなかった以外は実施例4と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の両側の面に配置されている通気性粘着シートの作製を試みた。しかし、レーザーの照射によって前駆体層に貫通孔が形成される前に原フィルムの炭化が進行して、通気性粘着シートを作製することができなかった。
Claims (13)
- 厚さ方向の通気性を有する通気性粘着シートであって、
厚さ方向に延びた第1の貫通孔を有する粘着剤層を備え、
前記粘着剤層の少なくとも一方の面が粘着面を構成し、
前記貫通孔の平均開口径が1.0~50μmであり、
前記貫通孔の平均間隔が5~400μmであり、
厚さ方向の通気度のばらつきが、測定有効面積を0.5~2.0mm2から選ばれる所定の値としてJIS L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠して測定した空気透過度の変動係数により表示して、22%以下である、通気性粘着シート。 - 前記粘着剤層の双方の面が粘着面を構成する基材レスの両面粘着シートである請求項1に記載の通気性粘着シート。
- 厚さ方向に延びた第2の貫通孔を有する基材をさらに備え、
前記粘着剤層は、前記基材の片側の面、又は前記基材の両側の面に配置されており、
前記第1の貫通孔と前記第2の貫通孔とが連通している請求項1に記載の通気性粘着シート。 - 前記基材がポリエチレンテレフタレート又はポリイミドを含む請求項1~3のいずれかに記載の通気性粘着シート。
- 前記粘着面上に剥離ライナーが配置されている請求項1~4のいずれかに記載の通気性粘着シート。
- 面積が100mm2以下である請求項1~5のいずれかに記載の通気性粘着シート。
- 厚さが10~100μmである請求項1~6のいずれかに記載の通気性粘着シート。
- 前記粘着剤層が紫外線吸収剤を含む請求項1~7のいずれかに記載の通気性粘着シート。
- 前記粘着剤層が、アクリル系粘着剤層又はシリコーン系粘着剤層である請求項1~8のいずれかに記載の通気性粘着シート。
- 前記通気性粘着シートを貼付する貼付面が通気性を有する通気性被着体用である請求項1~9のいずれかに記載の通気性粘着シート。
- 微小電気機械システム(MEMS)用である請求項1~10のいずれかに記載の通気性粘着シート。
- 開口を有する表面を有し、前記表面において前記開口を介した通気性を有する通気性製品であって、
前記開口を覆うように前記表面に貼付された通気性粘着シートをさらに備え、
前記通気性粘着シートが、請求項1~11のいずれかに記載の通気性粘着シートである通気性製品。 - 多孔質基材と、前記多孔質基材の表面に貼付された通気性粘着シートとを備え、
前記通気性粘着シートが、請求項1~11のいずれかに記載の通気性粘着シートである通気性製品。
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CN201980086548.3A CN113226752B (zh) | 2018-12-28 | 2019-12-23 | 透气性粘合片和透气性产品 |
JP2020563270A JP7461301B2 (ja) | 2018-12-28 | 2019-12-23 | 通気性粘着シート及び通気性製品 |
KR1020217023463A KR20210110330A (ko) | 2018-12-28 | 2019-12-23 | 통기성 점착 시트 및 통기성 제품 |
EP19905967.6A EP3904086A4 (en) | 2018-12-28 | 2019-12-23 | AIR PRESSURE SENSITIVE BREATHABLE ADHESIVE SHEET AND BREATHABLE PRODUCT |
US17/417,232 US11912908B2 (en) | 2018-12-28 | 2019-12-23 | Air-permeable adhesive sheet and breathable product |
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US11912908B2 (en) | 2024-02-27 |
EP3904086A1 (en) | 2021-11-03 |
EP3904086A4 (en) | 2022-09-07 |
TW202031834A (zh) | 2020-09-01 |
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