WO2017033274A1 - 粘着テープ - Google Patents
粘着テープ Download PDFInfo
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- WO2017033274A1 WO2017033274A1 PCT/JP2015/073808 JP2015073808W WO2017033274A1 WO 2017033274 A1 WO2017033274 A1 WO 2017033274A1 JP 2015073808 W JP2015073808 W JP 2015073808W WO 2017033274 A1 WO2017033274 A1 WO 2017033274A1
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- pressure
- adhesive tape
- sensitive adhesive
- base material
- substrate
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/245—Vinyl resins, e.g. polyvinyl chloride [PVC]
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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
- C09J201/02—Adhesives based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/26—Porous or cellular plastics
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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
-
- 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
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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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
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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
- 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
- C09J2301/122—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 only on one side of the carrier, e.g. single-sided adhesive tape
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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
- 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
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/414—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of a copolymer
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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
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/046—Presence of homo or copolymers of ethene in the substrate
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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
- C09J2431/00—Presence of polyvinyl acetate
- C09J2431/006—Presence of polyvinyl acetate in the substrate
Definitions
- the present invention relates to an adhesive tape that is excellent in various properties such as impact resistance, electrostatic resistance, shear deformation rate during heating, and pressing force, and can be suitably used in electronic devices such as smartphones and tablet terminals.
- Portable electronic devices such as smartphones and tablet terminals generally have a structure in which a touch panel and a housing for housing a liquid crystal module are combined.
- a touch panel and a housing for housing a liquid crystal module are combined.
- an adhesive tape is used to fix the touch panel and the housing.
- the adhesive tape will be greatly deformed in the thickness direction, and internal and external stresses may cause breakdown between layers, resulting in equipment damage. Furthermore, when pasting on a housing, it is inferior in dimensional stability and causes twisting.
- Patent Document 1 describes a double-sided pressure-sensitive adhesive tape in which an acrylic pressure-sensitive adhesive layer is provided on both surfaces of a foam base material.
- foam base material polyolefin resin foams such as polyethylene foam and polypropylene foam are described.
- the foam substrate has a thickness of 50 to 150 ⁇ m and a 30% compression load of 5 to 200 kPa.
- Patent Document 2 describes a waterproof double-sided pressure-sensitive adhesive tape composed of a polyolefin-based foam base material and an adhesive layer for the purpose of fixing components of portable electronic devices.
- the polyolefin foam substrate has a thickness of 70 to 300 ⁇ m, a 25% compressive strength of 40 to 160 kPa, a tensile strength of 300 to 1500 N / cm 2 , an average cell diameter in the thickness direction of 1 to 100 ⁇ m, and a flow direction.
- the average cell diameter in the width direction is 1.2 to 700 ⁇ m.
- Patent Document 3 describes an adhesive tape having an adhesive layer on at least one surface of a foam substrate.
- foam base material polyolefin-type foam base materials, such as polyethylene and a polypropylene, are described.
- the foam substrate has a thickness of 300 ⁇ m or less, an interlayer strength of 6 to 50 N / cm, a 25% compressive strength of 30 kPa or more, a tensile strength of 300 N / cm 2 or more, and an average cell diameter in the thickness direction of 10 to 100 ⁇ m.
- the average cell diameter in the flow direction and the width direction is 10 to 700 ⁇ m.
- Patent Document 4 describes a cross-linked polyolefin resin foam sheet having high impact absorption and electrostatic resistance.
- the foaming ratio of this foam sheet is 1.1 to 2.8 cm 3 / g
- the average cell diameter of bubbles MD is 150 to 250 ⁇ m
- the average cell diameter of CD is 120 to 300 ⁇ m
- the thickness is 0.02 to 1.9 mm
- the 25% compressive strength is 250-1500 kPa.
- Patent Documents 1 to 4 do not sufficiently examine the electrostatic resistance that is particularly important when the adhesive tape is used in an electronic device. Furthermore, according to the knowledge of the present inventors, the conventional physical property evaluation methods described in Patent Documents 1 to 4 cannot sufficiently evaluate whether or not the substrate is suitable for a narrow-width adhesive tape.
- “compressive strength” or “compressive load” described in Patent Documents 1 to 4 is merely an index of hardness in the thickness direction.
- the “tensile strength”, “tensile strength”, or “interlaminar strength” described in Patent Documents 2 and 3 is simply the strength at which the substrate breaks.
- the “average bubble diameter” or “foaming ratio” described in Patent Documents 3 and 4 is merely an index representing the degree of foaming.
- an object of the present invention is to provide an adhesive tape excellent in various properties such as impact resistance, electrostatic resistance, shear deformation rate during heating, and pressing force.
- the present inventors have found that it is very effective to use a substrate having a specific composition and exhibiting specific physical properties, and has completed the present invention. It was.
- the present invention is a pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer on one side or both sides of a base material, wherein the base material contains 30% by mass or more of an ethylene-vinyl acetate copolymer and is measured according to JIS K7161 2014.
- the adhesive tape has a tensile elastic modulus of 30 N / mm 2 or more.
- the glass transition temperature (Tg) of polyethylene is about -125 ° C.
- the Tg of the ethylene-vinyl acetate copolymer is considerably higher (for example, ⁇ 42 ° C.).
- the base material of the pressure-sensitive adhesive tape of the present invention contains a large amount of ethylene-vinyl acetate copolymer, it is a harder base material than a normal polyethylene base material.
- the pressure-sensitive adhesive tape of the present invention has excellent impact resistance despite the use of a hard substrate, and also has various properties such as electrostatic resistance, shear deformation rate during heating, and pressing force. Excellent, especially suitable for narrow adhesive tapes. Therefore, it is useful for various applications in fields where such characteristics are required.
- the base material used in the present invention is a base material containing 30% by mass or more of an ethylene-vinyl acetate copolymer and having a tensile elastic modulus of 30 N / mm 2 or more.
- the base material is preferably made of a polyolefin resin composition containing an ethylene-vinyl acetate copolymer and another polyolefin resin.
- polyolefin resins include polyethylene resins, polypropylene resins, and mixtures thereof.
- LLDPE linear low density polyethylene
- EPDM ethylene propylene rubber
- the content of the ethylene-vinyl acetate copolymer in the substrate is 30% by mass or more, preferably 30 to 70% by mass, more preferably 40 to 70% by mass, and particularly preferably 50 to 70% by mass.
- the lower limit of these ranges is significant in terms of properties such as electrostatic resistance, shear deformation rate during heating, narrow frame moisture and heat load resistance, and workability.
- the upper limit is significant in terms of characteristics such as impact resistance and waterproofness.
- the ethylene-vinyl acetate copolymer exhibits high rubber elasticity compared to linear low density polyethylene.
- an ethylene-vinyl acetate copolymer having a content in the above range is used for the base material, for example, when the base material is a foam, a rubber suitable for the use of the base material of the adhesive tape even if the bubble diameter is reduced. It is possible to maintain elasticity. As a result, the bubble diameter can be reduced, the tensile elastic modulus and bending moment (bending stiffness) of the base material are relatively high, and it is considered that there is also an effect of improving electrostatic resistance.
- the resin composition constituting the substrate can be produced by a known method. For example, it can be obtained by irradiating an electron beam to a resin composition containing 30% by mass or more of an ethylene-vinyl acetate copolymer and any other polyolefin-based resin. You may make it foam simultaneously with this crosslinking, or at the same time.
- the resin composition constituting the substrate may contain other additives as long as the effects of the present invention are not impaired.
- Specific examples thereof include a filler, a crosslinking agent, an antioxidant, a stabilizer, and a coupling agent.
- a light-shielding filler and a pigment may be included.
- Specific examples of the light-shielding filler include carbon black, carbon nanotube, and black inorganic filler.
- Specific examples of the pigment include carbon black, aniline black, acetylene black, and ketjen black.
- the width of the substrate is preferably 0.4 to 2.0 mm, more preferably 0.45 to 1.5 mm, and particularly preferably 0.6 to 1.2 mm.
- the thickness of the substrate is preferably 0.05 mm to 1.0 mm, more preferably 0.05 to 0.4 mm.
- the base material is preferably a foam, and the expansion ratio is preferably 1.1 to 3.5 times, more preferably 1.5 to 3.0 times.
- the foam shape of the foam is preferably spherical, and this is significant in terms of characteristics such as shear deformation ratio during heating, narrow frame moisture and heat load resistance, and impact resistance.
- the foam bubbles are preferably closed foam, which is significant in terms of characteristics such as waterproofness and oleic acid resistance.
- the density of the substrate is preferably 300 kg / m 3 or more, more preferably 300 to 700 kg / m 3 .
- the lower limit of these ranges is significant in terms of characteristics such as shear deformation rate during heating, narrow frame moisture and heat load, and workability.
- the upper limit is significant in terms of properties such as waterproofness and impact resistance.
- the tensile modulus of the base material measured according to JIS K7161 2014 is 30 N / mm 2 or more, preferably 32 N / mm 2 or more.
- a specific method for measuring the tensile modulus is described in the column of Examples. According to the knowledge of the present inventors, the identification based on the tensile elastic modulus of the substrate is very suitable as an index relating to an extremely narrow adhesive tape, unlike the conventional general evaluation method. This is because the problem of deformation due to external force or heating of an extremely narrow adhesive tape is completely different from that of a normal adhesive tape.
- a pressure-sensitive adhesive tape having sufficient characteristics can be obtained by using a substrate having a specific tensile modulus of the present invention.
- the deformation in the thickness direction of the tape is not a problem with a normal width adhesive tape, but the deformation in the thickness direction of the ultra-thin adhesive tape adversely affects various properties. Is often given.
- a substrate having a tensile elastic modulus in a specific range according to the present invention shows good results in various properties is due to, for example, the correlation between the tensile elastic modulus of the substrate and the amount of deformation in the thickness direction, etc. Inferred.
- the bending moment (bending stiffness) in the MD direction and the TD direction of the substrate measured according to JIS P8125 is preferably 5 gf / cm or more, more preferably 7 gf / cm or more.
- a specific method for measuring the bending moment is described in the column of Examples.
- This bending moment is also an index for avoiding the problem of deformation due to external force or heating of the ultra-thin adhesive tape, as in the case of the tensile elastic modulus described above, and according to the knowledge of the present inventors. Is. That is, the present inventors have found for the first time that an adhesive tape having more sufficient characteristics can be obtained by using a base material having a specific bending moment.
- the base material having a bending moment in a specific range of the present invention shows good results in various properties, as in the case of tensile modulus, for example, the bending moment of the base material and the amount of deformation in the thickness direction, etc. This is probably due to the correlation with
- such a high tensile elastic modulus and a high bending moment base material can be manufactured by a well-known method, and may be obtained with a commercial item.
- a substrate satisfying these characteristics can be easily obtained.
- these characteristics are not determined only by the content of the ethylene-vinyl acetate copolymer.
- Various factors such as substrate thickness, width, degree of crosslinking, expansion ratio, density, tensile strength, and elongation affect the tensile modulus and bending moment. Therefore, a specific base material satisfying these characteristics can be obtained by designing a product in consideration of various factors.
- the pressure-sensitive adhesive layer used in the present invention is not particularly limited.
- the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer various known pressure-sensitive adhesive compositions such as acrylic, rubber-based, silicone-based and urethane-based can be used. Among these, an acrylic pressure-sensitive adhesive composition is preferable from the viewpoints of heat resistance, impact resistance, adhesive strength, and waterproofness.
- the constituents of the acrylic pressure-sensitive adhesive composition are not particularly limited, but (meth) acrylic acid alkyl ester (A1) having an alkyl group having 1 to 3 carbon atoms, 10 to 20% by mass, carbon atoms (Meth) acrylic acid alkyl ester having 4 to 12 alkyl groups (A2) 50 to 80% by mass, carboxyl group-containing monomer (A3) 10 to 15% by mass, hydroxyl group-containing monomer (A4) 0.01 to 0 It is preferable to use an acrylic copolymer (A) containing 0.5% by mass and 1 to 5% by mass of vinyl acetate (A5) as a constituent component of the polymer chain as a resin component.
- a crosslinking agent capable of reacting with the carboxyl group and / or the hydroxyl group of the acrylic copolymer (A) may be blended to form a crosslinked structure with the acrylic copolymer (A).
- a silane coupling agent or an antioxidant may be blended.
- the thickness of the pressure-sensitive adhesive layer is preferably 5 to 100 ⁇ m, more preferably 10 to 80 ⁇ m.
- the pressure-sensitive adhesive layer can be formed, for example, by cross-linking the pressure-sensitive adhesive composition.
- the pressure-sensitive adhesive composition can be applied on a substrate and subjected to a crosslinking reaction by heating to form a pressure-sensitive adhesive layer on the substrate.
- an adhesive composition is apply
- a coating device such as a roll coater, a die coater, or a lip coater can be used.
- the solvent in the pressure-sensitive adhesive composition can be removed together with the crosslinking reaction by heating.
- the pressure-sensitive adhesive tape of the present invention has a pressure-sensitive adhesive layer on one side or both sides of a substrate.
- the pressure-sensitive adhesive layer may be formed only on one side of the substrate, but it is preferable to form it on both sides to form a double-sided pressure-sensitive adhesive tape.
- the withstand voltage when electrostatic discharge (ESD) is applied to the adhesive tape by a measurement method according to IEC 61000-4-2, which is an electrostatic resistance test standard, is preferably 10 kV or more, more preferably 13 kV or more. Such excellent electrostatic resistance is considered to be manifested particularly when the base material contains a relatively large amount of ethylene-vinyl acetate copolymer.
- the 60 ° specular gloss of the pressure-sensitive adhesive layer surface measured by specular gloss measurement according to JIS Z8741 when the adhesive tape is heated at 120 ° C. for 30 minutes is preferably 10 or more.
- the specular gloss is an index for evaluating the surface roughness. If the 60 ° specular gloss on the surface of the pressure-sensitive adhesive layer after heating is high, that is, if the surface is smooth, a sufficient adhesive surface can be secured, and excellent adhesiveness will be exhibited. Such 60 ° specular gloss after heating is affected not only by the characteristics of the pressure-sensitive adhesive layer but also by the type and characteristics of the substrate. In particular, when the pressure-sensitive adhesive layer is thin, the influence of the substrate is considered to be relatively large. Therefore, it is speculated that the specific base material used in the present invention also has an effect of not reducing the 60 ° specular glossiness of the surface of the pressure-sensitive adhesive tape after heating.
- the shear deformation rate during heating of the adhesive tape is preferably 150% or less, more preferably 130% or less.
- the shear deformation rate during heating of the adhesive tape is preferably 150% or less, more preferably 130% or less.
- the pressure-sensitive adhesive tape has such a heating shear deformation rate, it becomes difficult to be thermally deformed, and excellent impact resistance, load resistance and narrow frame moisture and heat load resistance are exhibited.
- a specific method for measuring the shear deformation rate during heating is described in the column of Examples.
- the pressing force of the adhesive tape is preferably 100 N / cm 2 or more, more preferably 150 N / cm 2 or more.
- the pressure-sensitive adhesive tape has such a pressing force, excellent impact resistance, load resistance, and narrow frame moisture and heat resistance are exhibited.
- a specific method for measuring the pressing force is described in the column of Examples.
- part means parts by mass
- % means mass%
- Table 1 shows the weight average molecular weight (Mw) and theoretical Tg of each acrylic copolymer.
- This weight average molecular weight (Mw) is a value obtained by measuring the molecular weight of an acrylic copolymer in terms of standard polystyrene by the GPC method using the following measuring apparatus and conditions.
- ⁇ Device LC-2000 series (manufactured by JASCO Corporation) -Column: Shodex KF-806M x 2 and Shodex KF-802 x 1-Eluent: Tetrahydrofuran (THF) ⁇ Flow rate: 1.0 mL / min ⁇ Column temperature: 40 ° C.
- ⁇ Injection volume 100 ⁇ L
- ⁇ Detector Refractometer (RI) Measurement sample: A solution in which an acrylic polymer is dissolved in THF to prepare a solution having an acrylic polymer concentration of 0.5% by mass, and dust is removed by filtration through a filter.
- the theoretical Tg is a value calculated by the FOX equation.
- an isocyanate-based cross-linking agent (Coronate (registered trademark) L-45E, 45% solution) manufactured by Nippon Polyurethane Industry Co., Ltd. as a cross-linking agent (B) with respect to 100 parts of the solid content of each acrylic copolymer (A) 0 0.04 parts of epoxy-based crosslinking agent (TEDRAD (registered trademark) -C) manufactured by Mitsubishi Gas Chemical Co., Ltd., and a silane coupling agent manufactured by Shin-Etsu Chemical Co., Ltd.
- PE polyethylene
- EVA ethylene-vinyl acetate copolymer
- Examples 2 and 3 A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1 except that the pressure-sensitive adhesive layer obtained in Production Examples 2 and 3 was used as the pressure-sensitive adhesive layer.
- the tensile elastic modulus of the base materials of Examples and Comparative Examples, and the bending moment of the base material and the adhesive tape are values measured by the following methods. Table 2 shows the measured values.
- the chuck interval (L) of a commercially available tensile test device (manufactured by Toyo Seiki Seisakusho, device name Strograph V-10C, full scale 50N) is set to 20 mm, and the upper and lower ends of the test piece are chucked. did. Thereafter, the film was pulled at a pulling speed of 10 mm / min to obtain a tensile load-displacement curve. A linear equation was obtained from the tensile loads with the displacement of the obtained tensile load-displacement curve being 0.05 mm and 0.25 mm.
- the substrate (or double-sided pressure-sensitive adhesive tape 1) was cut into a strip having a width of 38 mm and a length of 50 mm, and this was used as a test piece.
- the obtained test piece was sandwiched between four terminals 30 as shown in FIG. And based on JIS P8125, it installs in the part which operate
- the double-sided pressure-sensitive adhesive tape 1 was cut into a frame of 63 mm ⁇ 118 mm with a width of 0.5 mm, 0.6 mm, 0.8 mm, and 1.0 mm, and one release paper was peeled off. Then, as shown in FIG. 2, double-sided adhesive tape 1 is bonded to 1.5 mm-thick polycarbonate hook 2, then the other release paper is peeled off, and bonded to 2.0 mm-thick glass plate 3, at 23 ° C. For 60 minutes in an atmosphere of 50% RH. Then, a weight 4 of 200 gf was put on the hook 2 and held for 24 hours in an atmosphere of 40 ° C. and 90% RH, and load resistance was evaluated according to the following criteria. “ ⁇ ”: The hook 19 did not fall for 24 hours. “X”: The hook 19 fell within 60 minutes.
- the double-sided adhesive tape 1 is cut into a strip of 80 mm with a width of 0.8 mm, and one release paper is peeled off to form an HV electrode 6 and a copper electrode 7 formed on an acrylic plate 5 having a thickness of 2.0 mm ⁇ 80 mm ⁇ 120 mm. Then, the other release paper was peeled off and an acrylic plate 5 having a thickness of 2.0 mm ⁇ 80 mm ⁇ 80 mm was bonded.
- This sample was subjected to pressure treatment (0.5 MPa) at 23 ° C. for 5 seconds using an autoclave. As shown in FIG. 3, the electrostatic resistance of this sample was evaluated based on IEC61000-4-2 (electrostatic resistance standard).
- an electrostatic gun was applied to the HV electrode 15 at each voltage 50 times, and the applied voltage (ESD breakdown voltage) when current was conducted to the copper electrode 7 side was measured.
- This sample is placed on the stainless steel table 9 via the insulating sheet 8, and the copper electrode 7 is grounded to the stainless steel table 18.
- the double-sided pressure-sensitive adhesive tape was cut to 100 mm ⁇ 100 mm, the release paper was peeled off, and the end face of the tape was fixed with a clip and suspended in a hot air drier in a 120 ° C. atmosphere. After leaving for 30 minutes, the 60 ° specular gloss of the pressure-sensitive adhesive layer was measured with a handy gloss meter (manufactured by Nippon Denshoku Industries Co., Ltd., device name: PG-2M).
- the double-sided pressure-sensitive adhesive tape 1 was cut into a size of 25 mm ⁇ 25 mm, and one release paper was peeled off. Then, as shown in FIG. 4, the double-sided adhesive tape 1 is bonded to the SUS304BA board 10 having a thickness of 0.5 mm, a width of 30 mm, and a length of 100 mm, and then the other release paper is peeled off to form the SUS304BA board 10 of the same size. Bonding and curing were performed for 60 minutes in an atmosphere of 23 ° C. and 50% RH. Next, a 1 kgf weight 11 is suspended at the lower end, heated at 120 ° C. for 30 minutes and at 135 ° C.
- the double-sided pressure-sensitive adhesive tape 1 is cut into a frame having a width of 0.6 mm and a size of 63 mm ⁇ 118 mm, one release paper is peeled off, bonded to the 1.5 mm-thick polycarbonate plate 12, and the other release paper is peeled off. It bonded together to the tempered glass board 13 of thickness 1.9mm. As shown in FIG. 5, the bonded member was adjusted with a SUS304 plate 14 having a thickness of 2.0 mm so as to have a weight of 160 gf, and then cured for 60 minutes.
- the double-sided pressure-sensitive adhesive tape 1 was cut into a size of 25 mm ⁇ 25 mm, and one release paper was peeled off. Then, as shown in FIG. 6, the double-sided adhesive tape 1 is bonded to the nylon resin plate 16 having a length of 100 mm, a width of 50 mm, and a thickness of 2.0 mm fixed to the fixing jig 15, and then the other release paper is peeled off. Then, it was bonded to another nylon resin plate 16 of the same size and cured under an atmosphere of 23 ° C. and 50% RH for 24 hours. Then, as shown in FIG. 6, it was pushed downward at a speed of 50 mm / min, and the strength (N / cm 2 ) when the bonded portion was cut was measured.
- the double-sided pressure-sensitive adhesive tape 1 was cut into a frame shape of 45 mm ⁇ 50 mm with a width of 1.0 mm, and one release paper was peeled off and bonded to a 1.9 mm thick tempered glass plate 17. The other release paper was then peeled off and bonded to a 4.0 mm thick polycarbonate plate 18 with a 20 mm ⁇ hole in the center. This bonded member was subjected to a pressure treatment (0.5 MPa) at 23 ° C. for 5 seconds using an autoclave.
- a pressure treatment 0.5 MPa
- the SUS304 wedge 20 installed in the perforated portion of the polycarbonate plate 18 fixed to the fixing jig 19 using the DuPont impact resistance test shown in FIG.
- a 300 gf weight 21 was dropped at an arbitrary height three times, and the height when the tempered glass plate 17 and the polycarbonate plate 18 were peeled was measured.
- a double-sided adhesive tape is cut into a frame shape of 63 mm ⁇ 118 mm with a width of 0.6 mm, one release paper is peeled off and bonded to a 2.0 mm-thick glass plate, and the other release paper is peeled off, and 2.
- a glass plate having a thickness of 0 mm was bonded.
- This sample was subjected to pressure treatment (0.5 MPa) at 23 ° C. for 5 seconds using an autoclave. And this sample was submerged temporarily based on JIS IPX7 (waterproof standard), and the waterproof property was evaluated according to the following criteria.
- a sample was prepared in the same manner as described above, submerged in water having a depth of 10 cm based on JIS IPX8 (waterproof standard), and subjected to a pressure treatment at 23 ° C., 0.5 MPa, 1 hour using an autoclave according to the following criteria. The waterproofness was evaluated. “ ⁇ ”: Water did not enter the frame. “ ⁇ ”: Water entered the frame.
- the double-sided adhesive tape was cut into a size of 25 mm ⁇ 25 mm, and one release paper was peeled off. Then, a double-sided pressure-sensitive adhesive tape was bonded to the SUS304 hook, and then the other release paper was peeled off and bonded to the adherend.
- SUS304, polycarbonate plate, acrylic plate, EGI steel plate, galvalume steel plate, and glass plate were used as this adherend.
- a load of 700 gf was applied to the hook made of SUS304, held at 85 ° C. for 24 hours, and load resistance was evaluated according to the following criteria. “ ⁇ ”: The hook did not fall for 24 hours. "X”: The hook fell within 60 minutes.
- Comparative Example 1 a commercially available polyolefin-based foam base material containing no or only a small amount of ethylene-vinyl acetate copolymer and having a low tensile modulus and bending moment was used.
- the pressure-sensitive adhesive tape of Comparative Example 1 was inferior in narrow frame low-temperature impact resistance, electrostatic resistance, shear deformation rate during heating, narrow frame wet heat resistance, pressing force, and DuPont impact resistance.
- Comparative Example 2 a commercially available polyolefin-based foam base material containing no or a small amount of ethylene-vinyl acetate copolymer and having a low tensile elastic modulus was used.
- the pressure-sensitive adhesive tape of Comparative Example 2 was inferior in narrow frame low-temperature impact resistance, electrostatic resistance, pressing force, and DuPont impact resistance in the case of an extremely narrow width.
- the pressure-sensitive adhesive tape of the present invention has excellent impact resistance despite the use of a hard base material containing a large amount of ethylene-vinyl acetate copolymer.
- Various properties such as loadability, electrostatic resistance, processability, waterproofness and oleic acid resistance are also excellent. Therefore, it can be used for various applications in fields where such characteristics are required. In particular, it can be suitably used in applications of electronic devices such as smartphones and tablet terminals. Specifically, it can be used for fixing the casing and the top panel, fixing the in-vehicle LCD and the casing, and the like.
- Double-sided adhesive tape 1.5 mm thick polycarbonate hook 3 2.0 mm thick glass plate 4 200 gf weight 5 Acrylic plate 6 HV electrode 7 Copper electrode 8 Insulating sheet 9 Stainless steel table 10 0.5 mm thick SUS304BA plate 11 1 kgf 12 Weight 1.5 mm thick polycarbonate plate 13 1.9 mm thick tempered glass plate 14 2.0 mm thick SUS304 plate 15 Fixing jig 16 2.0 mm thick nylon resin plate 17 1.9 mm thick tempered glass plate 18 4.0 mm thick polycarbonate plate 19 Fixing jig 20 SUS304 wedge 21 300 gf weight 30 Terminal
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Abstract
Description
本発明に用いる基材は、エチレン-酢酸ビニル共重合体を30質量%以上含有し、且つ前記基材の引張弾性率が30N/mm2以上である基材である。
本発明に用いる粘着剤層は特に制限されない。粘着剤層を構成する粘着剤組成物としては、例えばアクリル系、ゴム系、シリコーン系、ウレタン系など公知の様々な粘着剤組成物を使用できる。中でも、耐熱性、耐衝撃性、接着力、防水性の観点からアクリル系粘着剤組成物が好ましい。
本発明の粘着テープは、基材の片面又は両面に粘着剤層を有する。粘着剤層は基材の片面だけに形成しても良いが、両面に形成して両面粘着テープとすることが好ましい。
攪拌機、温度計、還流冷却器及び窒素ガス導入管を備えた反応装置に、表1に示す量(%)の成分(A1)~(A5)と、酢酸エチル、連鎖移動剤としてn-ドデカンチオール及び過酸化物系ラジカル重合開始剤としてラウリルパーオキサイド0.1部を仕込んだ。反応装置内に窒素ガスを封入し、攪拌しながら窒素ガス気流下で68℃、3時間、その後78℃、3時間で重合反応させた。次いで、室温まで冷却し、酢酸エチルを添加した。これにより、固形分濃度30%のアクリル系共重合体(A)を得た。
・装置:LC-2000シリーズ(日本分光株式会社製)
・カラム:Shodex KF-806M×2本、Shodex KF-802×1本
・溶離液:テトラヒドロフラン(THF)
・流速:1.0mL/分
・カラム温度:40℃
・注入量:100μL
・検出器:屈折率計(RI)
・測定サンプル:アクリル系ポリマーをTHFに溶解させ、アクリル系ポリマーの濃度が0.5質量%の溶液を作製し、フィルターによるろ過でゴミを除去したもの。
理論Tgは、FOXの式により算出した値である。
「MA」:メチルアクリレート
「2-EHA」:2-エチルヘキシルアクリレート
「BA」:n-ブチルアクリレート
「AA」:アクリル酸
「4-HBA」:4-ヒドロキシブチルアクリレート
「Vac」:酢酸ビニル
まず、エチレン-酢酸ビニル共重合体(EVA)を60%含むポリエチレン(PE)系発泡体からなる基材(厚さ=0.15mm、引張弾性率=46.1N/mm2、曲げモーメント=15gf/cm、発泡倍率=1.9、密度=544kg/m3)を用意した。そして、この基材の両面をコロナ放電処理し、基材の両面に製造例1で得た離型紙上の粘着剤層を貼り合せ、40℃で3日間養生して、両面粘着テープを得た。
粘着剤層として、製造例2及び3で得た粘着剤層を使用したこと以外は、実施例1と同様にして両面粘着テープを得た。
基材として、EVAを70%含むPE系発泡体からなる基材(厚さ=0.15mm、引張弾性率=46.2N/mm2、曲げモーメント=18gf/cm、発泡倍率=1.7、密度=590kg/m3)を使用したこと以外は、実施例1と同様にして両面粘着テープを得た。
基材として、EVAを70%含むPE系発泡体からなる基材(厚さ=0.2mm、引張弾性率=36.6N/mm2、曲げモーメント=18gf/cm、発泡倍率=2.9、密度=356kg/m3)を使用したこと以外は、実施例1と同様にして両面粘着テープを得た。
基材として、PE系発泡体(積水化学工業社製、商品名ボラーラXL-HT♯030012、厚さ=0.2mm、引張弾性率=21.0N/mm2、曲げモーメント=3gf/cm、発泡倍率=3、密度=330kg/m3)を使用したこと以外は、実施例1と同様にして両面粘着テープを得た。
基材として、PE系発泡体(積水化学工業社製、商品名ボラーラXL-H♯0180015、厚さ=0.15mm、引張弾性率=23.7N/mm2、曲げモーメント=7gf/cm、発泡倍率=1.8、密度=560kg/m3)を使用したこと以外は、実施例1と同様にして両面粘着テープを得た。
基材を幅(W)10mm、長さ70mmの短冊状(長辺がMD方向)に裁断し、これを試験片とした。そして、厚さを1/100ダイヤルゲージ(N=5)で測定し、5点の平均値を厚さ(t)とし、以下の式から試験片の断面積(S)を求めた。
断面積S(mm2)=t×W
t:厚さ(mm)
W:幅(mm)
引張弾性率(N/mm2)=(F/S)/(x/L)
F:引張荷重=10(N)
S:断面積(mm2)
x:引張荷重=10Nの時の変位(mm)
L:チャック間隔=20(mm)
実施例1、2及び3:直線式 y=3.6667x+0.0767、引張弾性率 46.1N/mm2
実施例4:直線式 y=3.619x+0.0590、引張弾性率 46.2N/mm2
実施例5:直線式 y=3.639x+0.0689、引張弾性率 36.6N/mm2
比較例1:直線式 y=1.2632x-0.0432、引張弾性率 21.0N/mm2
比較例2:直線式 y=2.1026x+0.1349、引張弾性率 23.7N/mm2
基材(又は両面粘着テープ1)を幅38mm、長さ50mmの短冊状に裁断し、これを試験片とした。得られた試験片を図1に示すような4本の端子30に挟み込んだ。そして、JIS P8125に基づき、市販のテーバー剛性度試験機(東洋精機製作所社製)の試験時に稼働する部分に設置し、上下10gの重りを振り子へ取り付け、曲げ速度3°/sec、曲げ角度15°の時の目盛を読み、これを測定値とした。そして、この測定値を以下の計算式に代入し、MD方向及びTD方向の曲げモーメント(M)を算出した。
曲げモーメント(gf/cm)=38.0nk/w
n:目盛の読み(10gの重りの時は1)
k:一目盛当りのモーメント(gf/cm)
w:試験片の幅
実施例及び比較例で得た両面粘着テープを、以下の方法で評価した。結果を表3~6に示す。
両面粘着テープ1を幅0.5mm、0.6mm、0.8mm、1.0mmで63mm×118mmの枠状に裁断し、一方の離型紙を剥離した。そして図2に示すように、1.5mm厚のポリカーボネート製フック2に両面粘着テープ1を貼り合せ、次いでもう一方の離型紙を剥離し、2.0mm厚のガラス板3に貼り合せ、23℃、50%RHの雰囲気下で60分間養生した。そしてフック2に200gfの錘4をかけ、40℃、90%RHの雰囲気下で24時間保持し、以下の基準で耐荷重性を評価した。
「○」:24時間フック19は落下しなかった。
「×」:60分以内にフック19が落下した。
両面粘着テープ1を幅0.8mmで80mmの短冊状に裁断し、一方の離型紙を剥離して2.0mm厚×80mm×120mmのアクリル板5に形成されたHV電極6と銅電極7の間(電極間距離1.0mm)に貼り合せ、更にもう一方の離型紙を剥離して2.0mm厚×80mm×80mmのアクリル板5を貼り合せた。このサンプルに対して、オートクレーブを用いて23℃、5秒間の加圧処理(0.5MPa)を行った。そして図3に示すように、IEC61000-4-2(耐静電性規格)に基づき、このサンプルの耐静電性を評価した。具体的には、静電ガンを用いて各電圧にて50回ずつHV電極15に印加し、銅電極7側に電流が導通したときの印加電圧(ESD耐圧)を測定した。なお、このサンプルは絶縁シート8を介してステンレステーブル9上に設置され、銅電極7はステンレステーブル18にアースされている。
JIS Z8741に基づき、両面粘着テープを100mm×100mmに裁断し、離型紙を剥離して、120℃雰囲気下の熱風乾燥機中にクリップでテープの端面を固定し吊るした。30分間放置して取り出し後、ハンディ光沢度計(日本電色工業株式会社製、装置名PG-2M)で粘着剤層の60°鏡面光沢度を測定した。
両面粘着テープ1を25mm×25mmのサイズに裁断し、一方の離型紙を剥離した。そして図4に示すように、厚さ0.5mm、幅30mm、長さ100mmのSUS304BA板10に両面粘着テープ1を貼り合せ、次いでもう一方の離型紙を剥離し、同じサイズのSUS304BA板10に貼り合せ、23℃、50%RHの雰囲気下で60分間養生した。次いで、その下端に1kgfの錘11を吊るし、120℃で30分、135℃で30分加熱し、その変形量をルーペにて目視測定し、加熱時せん断変形率(△Sr)を下記の式にて算出した。
△Sr=(Xi+Xt)/Xi×100
△Sr:加熱時せん断変形率(%)
Xi:仕込みサンプル長(mm)=25(mm)
Xt:サンプル変形量(mm)
両面粘着テープ1を幅0.6mmで63mm×118mmの枠状に裁断し、一方の離型紙を剥離して、1.5mm厚のポリカーボネート板12に貼り合せ、更にもう一方の離型紙を剥離し、1.9mm厚の強化ガラス板13に貼り合せた。この貼り合せした部材を図5に示すように、重さが160gfになるように2.0mm厚のSUS304板14で調整した後、60分間養生した。このサンプルを-20℃の雰囲気下で、1.5Mの高さからせん断方向にコンクリート上に自由落下させ、以下の基準で耐衝撃性を評価した。
「○」:20回落下後、接着部分の剥がれ及び基材の層間破壊無し。
「×」:20回落下後、接着部分の剥がれ及び基材の層間破壊有り。
両面粘着テープ1を25mm×25mmにサイズに裁断し、一方の離型紙を剥離した。そして図6に示すように、固定用治具15に固定した長さ100mm、幅50mm、2.0mm厚のナイロン樹脂板16に両面粘着テープ1を貼り合せ、次いでもう一方の離型紙を剥離し、もう一つの同サイズのナイロン樹脂板16に貼り合せ、23℃、50%RHの雰囲気下で24時間養生した。そして図6に示すように下方向に50mm/分の速度で押し、貼り合せ部分が切れた時の強度(N/cm2)を測定した。
両面粘着テープ1を幅1.0mmで45mm×50mmの枠状に裁断し、一方の離型紙を剥離して、1.9mm厚の強化ガラス板17に貼り合せた。次いでもう一方の離型紙を剥離し、中心に20mmφの穴が開いた4.0mm厚のポリカーボネート板18に貼り合せた。この貼り合せた部材をオートクレーブを用いて23℃、5秒間の加圧処理(0.5MPa)を行った。その後、23℃雰囲気下にて24時間養生した後、図7に示すデュポン耐衝撃試験を用いて、固定用治具19に固定されたポリカーボネート板18の穴あき部分に設置したSUS304製クサビ20に対して300gfの錘21を任意の高さで3回落下させ、強化ガラス板17とポリカーボネート板18が剥れた時の高さを測定した。
両面粘着テープを幅0.6mmで63mm×118mmの枠状に裁断し、一方の離型紙を剥離して2.0mm厚のガラス板に貼り合せ、更にもう一方の離型紙を剥離して2.0mm厚のガラス板を貼り合せた。このサンプルに対して、オートクレーブを用いて23℃、5秒間の加圧処理(0.5MPa)を行った。そして、このサンプルをJIS IPX7(防水規格)に基づき一時的に水没させて、以下の基準で防水性を評価した。また、上記と同様にサンプルを作製し、JIS IPX8(防水規格)に基づき水深10cmの水中下に沈めて23℃、0.5MPa、1時間の加圧処理をオートクレーブを用いて行い以下の基準で防水性を評価した。
「○」:枠内に水が浸入しなかった。
「×」:枠内に水が浸入した。
両面粘着テープを幅0.6mmで63mm×118mmの枠状に裁断し、一方の離型紙を剥離して2.0mm厚のガラス板に貼り合せ、更にもう一方の離型紙を剥離して2.0mm厚のガラス板を貼り合せた。このサンプルに対して、オートクレーブを用いて23℃、0.5MPa、5秒間の加圧処理を行った。そして、このサンプルをオレイン酸に72時間浸漬した。サンプルを取り出し、85℃、85%RHの雰囲気下で24時間静置し、その後通常の雰囲気下に24時間放置した。そのサンプルを目視観察し、以下の基準で耐オレイン酸性を評価した。
「○」:枠内にオレイン酸が浸入しなかった。
「×」:枠内にオレイン酸が浸入した。
両面粘着テープを5mm×125mmのサイズで10本に細断した状態を維持したまま(すなわち細断した各々の粘着テープが細断時の隣接した状態を維持したまま)、65℃、80%RH雰囲気下に1日放置した。その後1本毎に180°方向に離型紙ごと剥離し、隣接した部分との癒着を目視にて確認し、以下の基準で加工性を評価した。
「○」:隣接した部分との癒着が殆ど無く、隣接部分を剥がすことなく剥離できた。
「×」:隣接した部分に著しい癒着があり、隣接部分が同時に剥がれてしまった。
両面粘着テープを25mm×25mmのサイズに裁断し、一方の離型紙を剥離した。そして、SUS304製フックに両面粘着テープを貼り合せ、次いでもう一方の離型紙を剥離し、被着体に貼り合せた。この被着体としては、SUS304、ポリカーボネート板、アクリル板、EGI鋼板、ガルバリウム鋼板、ガラス板を用いた。そしてSUS304製フックに700gfの荷重をかけ、85℃で24時間保持し、以下の基準で耐荷重性を評価した。
「○」:24時間フックは落下しなかった。
「×」:60分以内にフックが落下した。
表3~6の評価結果から明らかなように、実施例1~5の粘着テープは全ての特性が優れていた。
2 1.5mm厚のポリカーボネート製フック
3 2.0mm厚のガラス板
4 200gfの錘
5 アクリル板
6 HV電極
7 銅電極
8 絶縁シート
9 ステンレステーブル
10 0.5mm厚のSUS304BA板
11 1kgfの錘
12 1.5mm厚のポリカーボネート板
13 1.9mm厚の強化ガラス板
14 2.0mm厚のSUS304板
15 固定用治具
16 2.0mm厚のナイロン樹脂板
17 1.9mm厚の強化ガラス板
18 4.0mm厚のポリカーボネート板
19 固定用治具
20 SUS304製クサビ
21 300gfの錘
30 端子
Claims (12)
- 基材の片面又は両面に粘着剤層を有する粘着テープであって、前記基材がエチレン-酢酸ビニル共重合体を30質量%以上含有し、且つJIS K7161 2014に準じ測定される前記基材の引張弾性率が30N/mm2以上であることを特徴とする粘着テープ。
- 基材が、エチレン-酢酸ビニル共重合体と他のポリオレフィン系樹脂を含むポリオレフィン系樹脂組成物からなる請求項1記載の粘着テープ。
- 基材の幅が0.4~2.0mmである請求項1記載の粘着テープ。
- 基材の厚さが0.05mm~1.0mmである請求項1記載の粘着テープ。
- 基材が発泡体であり、その発泡倍率が1.1~3.5倍である請求項1記載の粘着テープ。
- 基材の密度が300kg/m3以上である請求項1記載の粘着テープ。
- JIS P8125に準じ測定される基材のMD方向及びTD方向における曲げモーメント(曲げこわさ)が5gf/cm以上である請求項1記載の粘着テープ。
- 耐静電性試験規格であるIEC61000-4-2に準じた測定方法により、静電気放電を粘着テープに与えた場合の耐圧が10kV以上である請求項1記載の粘着テープ。
- 粘着テープを120℃で30分加熱したときのJIS Z8741に準じた鏡面光沢度測定で測定される粘着剤層表面の60°鏡面光沢度が10以上である請求項1記載の粘着テープ。
- 粘着テープの加熱時せん断変形率が150%以下である請求項1記載の粘着テープ。
- 粘着テープの押圧力が100N/cm2以上である請求項1記載の粘着テープ。
- 電子機器用粘着テープである請求項1記載の粘着テープ。
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EP15902244.1A EP3342836B1 (en) | 2015-08-25 | 2015-08-25 | Pressure-sensitive adhesive tape |
KR1020167023718A KR101748102B1 (ko) | 2015-08-25 | 2015-08-25 | 점착 테이프 |
PCT/JP2015/073808 WO2017033274A1 (ja) | 2015-08-25 | 2015-08-25 | 粘着テープ |
CN201580016920.5A CN106414638B (zh) | 2015-08-25 | 2015-08-25 | 粘着胶带 |
US15/754,557 US20180237673A1 (en) | 2015-08-25 | 2015-08-25 | Adhesive tape |
JP2016548757A JP6010721B1 (ja) | 2015-08-25 | 2015-08-25 | 粘着テープ |
TW105125925A TWI756179B (zh) | 2015-08-25 | 2016-08-15 | 黏著帶 |
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EP (1) | EP3342836B1 (ja) |
JP (1) | JP6010721B1 (ja) |
KR (1) | KR101748102B1 (ja) |
CN (1) | CN106414638B (ja) |
TW (1) | TWI756179B (ja) |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018230323A1 (ja) * | 2017-06-14 | 2018-12-20 | Dic株式会社 | 粘着シート及び電子機器 |
WO2019021371A1 (ja) * | 2017-07-25 | 2019-01-31 | 株式会社寺岡製作所 | 粘着テープ |
JP2019019257A (ja) * | 2017-07-20 | 2019-02-07 | 三菱ケミカル株式会社 | 粘着シート |
WO2019043810A1 (ja) * | 2017-08-30 | 2019-03-07 | 株式会社寺岡製作所 | 粘着テープ |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109054698A (zh) * | 2018-07-02 | 2018-12-21 | 合肥萃励新材料科技有限公司 | 一种pesd功能水性胶的制备工艺 |
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2015
- 2015-08-25 WO PCT/JP2015/073808 patent/WO2017033274A1/ja active Application Filing
- 2015-08-25 KR KR1020167023718A patent/KR101748102B1/ko active IP Right Grant
- 2015-08-25 US US15/754,557 patent/US20180237673A1/en active Pending
- 2015-08-25 CN CN201580016920.5A patent/CN106414638B/zh active Active
- 2015-08-25 EP EP15902244.1A patent/EP3342836B1/en active Active
- 2015-08-25 JP JP2016548757A patent/JP6010721B1/ja active Active
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2016
- 2016-08-15 TW TW105125925A patent/TWI756179B/zh active
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Cited By (11)
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WO2018230323A1 (ja) * | 2017-06-14 | 2018-12-20 | Dic株式会社 | 粘着シート及び電子機器 |
KR20200019125A (ko) * | 2017-06-14 | 2020-02-21 | 디아이씨 가부시끼가이샤 | 점착 시트 및 전자 기기 |
JPWO2018230323A1 (ja) * | 2017-06-14 | 2020-03-26 | Dic株式会社 | 粘着シート及び電子機器 |
KR102518118B1 (ko) | 2017-06-14 | 2023-04-05 | 디아이씨 가부시끼가이샤 | 점착 시트 및 전자 기기 |
JP2019019257A (ja) * | 2017-07-20 | 2019-02-07 | 三菱ケミカル株式会社 | 粘着シート |
WO2019021371A1 (ja) * | 2017-07-25 | 2019-01-31 | 株式会社寺岡製作所 | 粘着テープ |
JPWO2019021371A1 (ja) * | 2017-07-25 | 2020-07-02 | 株式会社寺岡製作所 | 粘着テープ |
JP7130312B2 (ja) | 2017-07-25 | 2022-09-05 | 株式会社寺岡製作所 | 粘着テープ |
WO2019043810A1 (ja) * | 2017-08-30 | 2019-03-07 | 株式会社寺岡製作所 | 粘着テープ |
JPWO2019043810A1 (ja) * | 2017-08-30 | 2020-09-24 | 株式会社寺岡製作所 | 粘着テープ |
US11286406B2 (en) | 2017-08-30 | 2022-03-29 | Teraoka Seisakusho Co., Ltd. | Adhesive tape |
Also Published As
Publication number | Publication date |
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EP3342836A4 (en) | 2019-03-06 |
TW201715000A (zh) | 2017-05-01 |
EP3342836A1 (en) | 2018-07-04 |
TWI756179B (zh) | 2022-03-01 |
EP3342836B1 (en) | 2022-05-18 |
CN106414638A (zh) | 2017-02-15 |
JP6010721B1 (ja) | 2016-10-19 |
KR101748102B1 (ko) | 2017-06-15 |
US20180237673A1 (en) | 2018-08-23 |
CN106414638B (zh) | 2018-09-11 |
JPWO2017033274A1 (ja) | 2017-08-24 |
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