WO2017126135A1 - Bande adhésive double face - Google Patents

Bande adhésive double face Download PDF

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Publication number
WO2017126135A1
WO2017126135A1 PCT/JP2016/059895 JP2016059895W WO2017126135A1 WO 2017126135 A1 WO2017126135 A1 WO 2017126135A1 JP 2016059895 W JP2016059895 W JP 2016059895W WO 2017126135 A1 WO2017126135 A1 WO 2017126135A1
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WO
WIPO (PCT)
Prior art keywords
sensitive adhesive
double
adhesive tape
weight
pressure
Prior art date
Application number
PCT/JP2016/059895
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English (en)
Japanese (ja)
Inventor
徳之 内田
勇樹 岩井
Original Assignee
積水化学工業株式会社
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Filing date
Publication date
Application filed by 積水化学工業株式会社 filed Critical 積水化学工業株式会社
Priority to KR1020187000066A priority Critical patent/KR20180101316A/ko
Priority to CN201680035144.8A priority patent/CN107709495A/zh
Priority to JP2016521365A priority patent/JP6687515B2/ja
Publication of WO2017126135A1 publication Critical patent/WO2017126135A1/fr

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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
    • C09J193/00—Adhesives based on natural resins; Adhesives based on derivatives thereof
    • C09J193/04—Rosin
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • 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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • 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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/08—Homopolymers or copolymers of acrylic acid esters
    • 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
    • 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
    • C09J2301/30—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
    • 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
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/24—Presence of a foam
    • C09J2400/243—Presence of a foam in the substrate

Definitions

  • the present invention relates to a double-sided pressure-sensitive adhesive tape excellent in shearing adhesive force, which is used for adhesive fixing of parts constituting portable electronic devices, adhesive fixing of automobile members, and the like.
  • Mobile electronic devices such as mobile phones and personal information terminals (Personal Digital Assistants, PDAs) are designed so that they do not come off or break even if an impact is applied in consideration of falling from the user's hand to the foot.
  • PDAs Personal Digital Assistants
  • Fixed arrangements or device body designs are being considered. Therefore, a double-sided pressure-sensitive adhesive tape that is used for fixing the component to the main body of the device is desired to prevent the component from coming off even when an impact is applied, and not to apply a strong shock to the component. ing.
  • a double-sided pressure-sensitive adhesive tape having a base material made of a polyolefin foam has been studied as an impact absorbing tape for fixing a component constituting a portable electronic device to the device body.
  • an acrylic pressure-sensitive adhesive layer is laminated and integrated on at least one surface of a base material layer, and the base material layer has a specific cross-linking degree and a foam aspect ratio.
  • a shock absorbing tape is described.
  • double-sided pressure-sensitive adhesive tapes are also used for fixing automobile members (for example, in-vehicle panels) to the automobile body, and as such double-sided pressure-sensitive adhesive tapes, a base made of a polyolefin foam having excellent shock absorbing performance is also used. A double-sided adhesive tape having a material is used.
  • An object of this invention is to provide the double-sided adhesive tape excellent in the shear adhesive force used for the adhesion fixation of the components which comprise a portable electronic device, the adhesion fixation of a motor vehicle member, etc.
  • the present invention is a double-sided pressure-sensitive adhesive tape having an acrylic pressure-sensitive adhesive layer on both surfaces of a substrate, wherein the substrate is made of a foam, and has an interlayer strength of 10 N / 5 mm or more and 30 N / 5 mm or less.
  • the acrylic pressure-sensitive adhesive layer is a double-sided pressure-sensitive adhesive tape having a storage elastic modulus G ′ at 20 ° C. of 2.5 ⁇ 10 5 Pa or more and a loss elastic modulus G ′′ at 20 ° C. of 2 ⁇ 10 5 Pa or more.
  • the present invention is described in detail below.
  • the inventors adjusted the storage elastic modulus G ′ and loss elastic modulus G ′′ of the acrylic pressure-sensitive adhesive layer at 20 ° C. to a specific range, It has been found that the acrylic pressure-sensitive adhesive layer has an appropriate hardness, and an excellent shear adhesive strength can be obtained.However, when the base material is a foam, the base material can withstand a load in the shear direction. On the other hand, the inventor of the present invention prevents such interlayer breakdown of the base material by adjusting the interlayer strength of the base material to a specific range. The present inventors have found that the present invention can be accomplished and have completed the present invention.
  • the double-sided pressure-sensitive adhesive tape of the present invention has a base material made of a foam.
  • the said foam will not be specifically limited if it is a foam in which the bubble exists in resin, A polyolefin foam is preferable.
  • the base material has an interlayer strength of 10 N / 5 mm or more and 30 N / 5 mm or less.
  • the interlayer strength of the substrate is less than 10 N / 5 mm, when a load in a large shearing direction is applied to the double-sided pressure-sensitive adhesive tape, the interlayer fracture of the substrate occurs.
  • the interlayer strength of the substrate is preferably 15 N / 5 mm or more. When the interlayer strength of the substrate exceeds 30 N / 5 mm, the flexibility of the substrate is impaired.
  • the interlayer strength of the substrate is preferably 20 N / 5 mm or less.
  • the interlayer strength of the substrate can be measured as follows. In FIG. 1, the schematic diagram which shows the measuring method of the interlayer intensity
  • an adhesive (not shown) is applied to both sides of a substrate (width 5 mm) 1 to a thickness of 50 ⁇ m, and one side of this substrate is lined with a PET film having a thickness of 23 ⁇ m (illustration). No), the other surface is bonded to the SUS plate 2 and cured for 48 hours to prepare a test sample.
  • the base material 1 is peeled off at a speed of 100 m / min in the 180 ° direction at 23 ° C. and 50% RH, and the peel strength when the base material 1 causes interlaminar fracture is defined as the interlayer strength.
  • the interlayer strength of the base material can be adjusted to a desired range by the density of the base material, the expansion ratio, the degree of crosslinking, and the stretch ratio.
  • the thickness of the said base material is not specifically limited, A preferable minimum is 80 micrometers and a preferable upper limit is 300 micrometers.
  • a preferable minimum is 80 micrometers and a preferable upper limit is 300 micrometers.
  • the thickness of the base material is less than 80 ⁇ m, the strength of the base material may be reduced, and the base material may be easily broken between layers, or the impact resistance of the double-sided pressure-sensitive adhesive tape may be reduced. If the thickness of the base material exceeds 300 ⁇ m, the flexibility of the base material may be reduced and the impact resistance of the double-sided pressure-sensitive adhesive tape may be reduced, and the total thickness of the double-sided pressure-sensitive adhesive tape may be increased. It may not be suitable for applications such as adhesive fixing of components to be configured, and adhesive fixing of automobile members.
  • the minimum with more preferable thickness of the said base material is 100 micrometers, and a more preferable upper limit is 200 micrometers.
  • the density of the base material is preferably 0.35 g / cm 3 or more and 0.7 g / cm 3 or less.
  • Density is more preferably 0.45 g / cm 3 or more of the substrate, 0.5 g / cm 3 or more is more preferable.
  • the density of the substrate is 0.7 g / cm 3 or less, the impact resistance of the double-sided pressure-sensitive adhesive tape can be further increased.
  • a more preferable upper limit of the density of the base material is 0.6 g / cm 3 .
  • the density of the substrate can be measured and calculated using an electronic hydrometer (trade name “ED120T”) manufactured by Mirage in accordance with JISK-6767.
  • a preferable lower limit is 1.2 times and a preferable upper limit is 2.8 times.
  • the expansion ratio of the base material is 1.2 times or more, the flexibility and impact resistance of the double-sided pressure-sensitive adhesive tape can be improved. Since the foaming ratio of the base material is 2.8 times or less, the base material can not withstand a load in the shearing direction and is prevented from being broken (interlaminar fracture), and both surfaces have excellent shear adhesive strength. An adhesive tape can be obtained.
  • the more preferable lower limit of the foaming ratio of the substrate is 1.4 times, the more preferable upper limit is 2.2 times, the more preferable lower limit is 1.7 times, and the more preferable upper limit is 2 times.
  • the expansion ratio of the substrate can be calculated from the reciprocal of the density of the substrate.
  • a conventionally known method such as foaming after crosslinking a resin composition as a raw material as necessary
  • the method can be used.
  • the substrate is a polyolefin resin composition
  • it can be produced by a method having the following steps (1) to (3).
  • Step (1) Polyolefin resin composition, which is made into a sheet by supplying a polyolefin resin, a pyrolytic foaming agent, and other additives to an extruder, melt-kneading, and extruding the sheet from the extruder Step (2) for obtaining a product Step (3) for crosslinking the sheet-shaped polyolefin resin composition
  • Step (3) Heating the cross-linked sheet-shaped polyolefin resin composition to foam a pyrolytic foaming agent And a step of stretching in either or both of the MD direction and the TD direction.
  • the method described in International Publication No. 2005/007731 is a method for producing a crosslinked polyolefin resin foam. Can also be manufactured.
  • Examples of the polyolefin resin in the step (1) include a polyethylene resin, a polypropylene resin, or a mixture thereof.
  • the polyethylene resin may be an ethylene homopolymer, but is preferably a polyethylene- ⁇ -olefin copolymer obtained by copolymerizing ethylene and a small amount of ⁇ -olefin, and among them, Linear low density polyethylene is more preferable.
  • the polyethylene resin a copolymer of ethylene and a small amount of ⁇ -olefin, the flexibility of the foam can be increased and the impact resistance can be further improved.
  • Examples of the ⁇ -olefin in the polyethylene- ⁇ -olefin copolymer include propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, and 1-octene. Can be mentioned. Of these, ⁇ -olefins having 4 to 10 carbon atoms are preferable.
  • the preferable lower limit of the ⁇ -olefin in the polyethylene- ⁇ -olefin copolymer is 30% by weight, and the more preferable lower limit is 10% by weight.
  • an ethylene-vinyl acetate copolymer is also preferable.
  • the ethylene-vinyl acetate copolymer is a copolymer containing 50% by weight or more of a structural unit derived from ethylene.
  • the polyethylene-based resin preferably has a low density from the viewpoint of enhancing the flexibility of the foam and enhancing the impact resistance.
  • the density of the polyethylene resin is preferably from 0.920 g / cm 3 or less, more preferably 0.880 ⁇ 0.915g / cm 3, more preferably 0.885 ⁇ 0.910g / cm 3.
  • the density is a value measured according to ASTM D792.
  • polypropylene resin examples include a propylene homopolymer, a propylene- ⁇ -olefin copolymer containing 50% by weight or more of a structural unit derived from propylene, and the like. These may be used alone or in combination of two or more.
  • ⁇ -olefin in the propylene- ⁇ -olefin copolymer examples include ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene and the like. It is done. Among these, ⁇ -olefins having 6 to 12 carbon atoms are preferable.
  • the polyolefin resin is a polyethylene resin, a polypropylene resin polymerized by using a metallocene compound, a Ziegler-Natta compound, a chromium oxide compound or the like as a catalyst, or these Preferably, it is a linear low density polyethylene.
  • the metallocene compound is preferably a compound such as a bis (cyclopentadienyl) metal complex having a structure in which a transition metal is sandwiched between ⁇ -electron unsaturated compounds.
  • a tetravalent transition metal such as titanium, zirconium, nickel, palladium, hafnium, and platinum has one or more cyclopentadienyl rings or analogs thereof as a ligand (ligand).
  • ligand ligand
  • the polymer synthesized using the above metallocene compound has high uniformity in molecular weight, molecular weight distribution, composition, composition distribution, etc., and thus when a sheet containing a polymer synthesized using the above metallocene compound is crosslinked. In this case, the crosslinking proceeds uniformly. Since the uniformly crosslinked sheet is easily stretched uniformly, the thickness of the crosslinked polyolefin resin foam is easily uniformed.
  • the ligand examples include cyclic compounds such as a cyclopentadienyl ring and an indenyl ring.
  • the cyclic compound may have a substituent such as a hydrocarbon group, a substituted hydrocarbon group, or a hydrocarbon-substituted metalloid group.
  • the hydrocarbon group include a methyl group, an ethyl group, various propyl groups, various butyl groups, various amyl groups, various hexyl groups, 2-ethylhexyl groups, various heptyl groups, various octyl groups, various nonyl groups, and various decyl groups.
  • “various” means various isomers such as n-, sec-, tert-, iso- and the like.
  • what polymerized the said cyclic compound as an oligomer may be used as a ligand.
  • monovalent anion ligands such as chlorine and bromine, divalent anion chelate ligands, hydrocarbons, alkoxides, arylamides, aryloxides, amides, arylamides, phosphides, aryls Phosphide or the like may be used.
  • metallocene compound containing the tetravalent transition metal and the ligand examples include, for example, cyclopentadienyl titanium tris (dimethylamide), methylcyclopentadienyl titanium tris (dimethylamide), and bis (cyclopentadienyl) titanium dichloride. And dimethylsilyltetramethylcyclopentadienyl-t-butylamidozirconium dichloride.
  • the said metallocene compound exhibits the effect
  • cocatalyst include methylaluminoxane (MAO) and boron compounds.
  • the use ratio of the cocatalyst to the metallocene compound is preferably 100,000 to 1,000,000 mole times, more preferably 50 to 5,000 mole times.
  • the content is preferably 40% by weight or more of the total polyolefin resin, % By weight or more is more preferable, 60% by weight or more is more preferable, and 100% by weight is particularly preferable.
  • the polyolefin foam is thin because the content of the polyethylene resin, ethylene-vinyl acetate copolymer, or mixture thereof obtained by using the metallocene compound as a catalyst is 40% by weight or more Even so, a high compressive strength can be obtained.
  • the Ziegler-Natta compound is a triethylaluminum-titanium tetrachloride solid composite, which is obtained by reducing titanium tetrachloride with an organoaluminum compound and then treating with various electron donors and electron acceptors.
  • a method of combining a titanium composition, an organoaluminum compound and an aromatic carboxylic acid ester see JP-A 56-1000080, JP-A 56-120712, JP-A 58-104907
  • Method of supported catalyst in which titanium tetrachloride and various electron donors are brought into contact with magnesium halide see JP-A-57-63310, JP-A-63-43915, JP-A-63-83116
  • the said polyolefin resin composition may contain arbitrary components, such as resin other than the polyolefin resin mentioned above.
  • gum are mentioned.
  • the total content of these optional components is preferably less than that of the polyolefin resin. Specifically, the content is preferably 50 parts by weight or less and 100 parts by weight or less with respect to 100 parts by weight of the polyolefin resin. Is more preferable.
  • the pyrolytic foaming agent is not particularly limited, and examples thereof include azodicarbonamide, N, N′-dinitrosopentamethylenetetramine, p-toluenesulfonyl semicarbazide, and among them, azodicarbonamide is preferable.
  • the said thermal decomposition type foaming agent may be used independently and may be used in combination of 2 or more type.
  • the content of the pyrolytic foaming agent is preferably 1 to 12 parts by weight, more preferably 1 to 8 parts by weight, based on 100 parts by weight of the polyolefin resin.
  • the content of the pyrolytic foaming agent is within the above range, the foamability of the polyolefin resin composition is improved, and it becomes easier to obtain a polyolefin resin foam having a desired expansion ratio and interlayer strength. , Tensile strength and compression recovery can be improved.
  • Examples of the other additives include a decomposition temperature adjusting agent, a crosslinking aid, and an antioxidant.
  • the said decomposition temperature regulator is mix
  • Examples of the decomposition temperature adjusting agent include zinc oxide, zinc stearate, urea and the like.
  • the content of the decomposition temperature adjusting agent with respect to 100 parts by weight of the polyolefin resin is preferably 0.01 to 5 parts by weight.
  • the crosslinking aid is added to the polyolefin resin to reduce the amount of ionizing radiation irradiated in the crosslinking of the polyolefin resin, which will be described later, and to prevent the resin molecules from being cut and deteriorated by the irradiation of the ionizing radiation. Is blended into.
  • a polyfunctional monomer etc. are mentioned, for example. Specifically, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, trimellitic acid triallyl ester, 1,2,4-benzenetricarboxylic acid triallyl ester, triallyl isocyanurate, etc.
  • the addition amount of the crosslinking aid is preferably 0.2 to 10 parts by weight, more preferably 0.3 to 5 parts by weight, and still more preferably 0.5 to 5 parts by weight with respect to 100 parts by weight of the polyolefin resin.
  • the addition amount of the crosslinking aid is 0.2 parts by weight or more, a foam having a desired degree of crosslinking can be stably obtained.
  • the addition amount of the crosslinking aid is 10 parts by weight or less, the degree of crosslinking of the foam can be easily controlled.
  • the antioxidant is blended to prevent oxidative deterioration due to heat.
  • examples of the antioxidant include phenolic antioxidants such as 2,6-di-t-butyl-p-cresol.
  • examples of the method of crosslinking the polyolefin resin composition include a method of irradiating the polyolefin resin composition with ionizing radiation such as electron beam, ⁇ ray, ⁇ ray, ⁇ ray, Examples include a method in which an organic peroxide is blended in advance when forming the resin composition, and then the organic peroxide is decomposed by heating the polyolefin resin composition. These methods may be used alone or in combination of two or more. From the viewpoint of homogeneous crosslinking, a method of irradiating ionizing radiation is preferable.
  • the dose of ionizing radiation in the method of irradiating with ionizing radiation is preferably adjusted so that the gel fraction is 5 to 45% by weight.
  • a specific irradiation amount is preferably 0.5 to 20 Mrad, and more preferably 3 to 12 Mrad.
  • Examples of the organic peroxide in the method of previously blending the organic peroxide with the resin composition include 1,1-bis (t-butylperoxy) 3,3,5-trimethylcyclohexane, 1,1- Examples thereof include bis (t-butylperoxy) cyclohexane. These may be used alone or in combination of two or more.
  • the amount of the organic peroxide added is preferably 0.01 to 5 parts by weight and more preferably 0.1 to 3 parts by weight with respect to 100 parts by weight of the polyolefin resin. When the addition amount of the organic peroxide is within the above range, the crosslinking of the resin composition is likely to proceed, and the amount of decomposition residue of the organic peroxide present in the obtained polyolefin foam is suppressed. be able to.
  • the method of foaming the polyolefin resin composition is not particularly limited.
  • the method of heating the polyolefin resin composition with hot air the method of heating with infrared rays, the method of heating with a salt bath, the oil bath The method of heating by, etc. are mentioned, These may be used together.
  • the foaming method of a polyolefin-type resin composition is not limited to the method of using a thermal decomposition type foaming agent, You may use physical foaming by a butane gas etc.
  • the polyolefin resin composition is foamed to obtain a foam, and then stretched, or the polyolefin resin composition is stretched while being foamed. Methods and the like.
  • foaming a polyolefin-based resin composition to obtain a foam it is preferable to stretch the foam while maintaining the molten state at the time of foaming without cooling the foam.
  • the foam may be stretched after the cooled foam is heated again to a molten or softened state.
  • the draw ratio in the MD direction of the polyolefin-based resin composition is preferably 1.1 to 3.0 times, and more preferably 1.7 to 2.8 times.
  • the draw ratio in the MD direction of the polyolefin resin composition is preferably 1.1 to 3.0 times, and more preferably 1.7 to 2.8 times.
  • the MD direction (Machine Direction) is used when extruding a polyolefin foam into a sheet shape.
  • the direction of extrusion refers to the TD direction (Transverse Direction) refers to the direction perpendicular to the MD direction.
  • At least one acrylic pressure-sensitive adhesive layer has a storage elastic modulus G ′ at 20 ° C. of 2.5 ⁇ 10 5 Pa or more and a loss elastic modulus G ′′ at 20 ° C. of 2 ⁇ 10 5 Pa or more. It is.
  • the acrylic pressure-sensitive adhesive layer has an appropriate hardness, and has excellent shear adhesive strength.
  • double-sided pressure-sensitive adhesive tape of the present invention if at least one acrylic pressure-sensitive adhesive layer has a storage elastic modulus G ′ and a loss elastic modulus G ′′ within the above range, double-sided acrylic pressure-sensitive adhesive is used.
  • the layers may have the same composition or different compositions.
  • the storage elastic modulus G ′ at 20 ° C. is less than 2.5 ⁇ 10 5 Pa, the shear adhesive strength of the double-sided pressure-sensitive adhesive tape decreases, and when a large load in the shear direction is applied, the double-sided pressure-sensitive adhesive tape peels off.
  • the storage elastic modulus G ′ at 20 ° C. is preferably 4.0 ⁇ 10 5 Pa or more, and more preferably 6.0 ⁇ 10 5 Pa or more.
  • the upper limit of the storage elastic modulus G ′ at 20 ° C. is not particularly limited, but if it is too high, the tackiness of the acrylic pressure-sensitive adhesive layer may be lost, and the initial adhesiveness may be lowered. 10 6 Pa, and a more preferable upper limit is 3.0 ⁇ 10 6 Pa.
  • the loss elastic modulus G ′′ at 20 ° C. is less than 2 ⁇ 10 5 Pa, the shear adhesive strength of the double-sided pressure-sensitive adhesive tape decreases, and the double-sided pressure-sensitive adhesive tape peels off when a large load in the shear direction is applied.
  • the loss elastic modulus G ′′ at ° C. is preferably 4.0 ⁇ 10 5 Pa or more, and more preferably 6.0 ⁇ 10 5 Pa or more.
  • the upper limit of the loss elastic modulus G ′′ at 20 ° C. is not particularly limited. However, if it is too high, the tackiness of the acrylic pressure-sensitive adhesive layer is lost and the initial adhesiveness may be lowered. 10 6 Pa, and a more preferable upper limit is 3.0 ⁇ 10 6 Pa.
  • the storage elastic modulus G ′ and loss elastic modulus G ′′ at 20 ° C. were measured using a dynamic viscoelasticity measuring device (for example, DVA-200 manufactured by IT Measurement Control Co., Ltd.) at a frequency of 10 Hz and a heating rate of 3 ° C. It can be obtained by measuring from ⁇ 40 ° C. to 140 ° C. at / min and reading storage elastic modulus G ′ and loss elastic modulus G ′′ at 20 ° C.
  • a dynamic viscoelasticity measuring device for example, DVA-200 manufactured by IT Measurement Control Co., Ltd.
  • the composition, weight average molecular weight, molecular weight distribution, etc. of the acrylic copolymer are adjusted.
  • Methods, methods of mixing acrylic copolymers of different compositions, weight average molecular weight, molecular weight distribution, etc., methods of adjusting the softening point, content, etc. of tackifying resins, methods of adjusting the degree of crosslinking of the acrylic pressure-sensitive adhesive layer, etc. Is mentioned.
  • the acrylic copolymer constituting the acrylic pressure-sensitive adhesive layer is preferably obtained by copolymerizing a monomer mixture containing butyl acrylate and 2-ethylhexyl acrylate.
  • the preferred content of butyl acrylate in the total monomer mixture is 40 to 80% by weight.
  • the acrylic pressure-sensitive adhesive layer becomes too soft and the cohesive force may be reduced, and the shear adhesive force of the double-sided pressure-sensitive adhesive tape may be reduced.
  • the acrylic pressure-sensitive adhesive layer becomes hard and the adhesive strength or tack may decrease, and the shear adhesive strength of the double-sided adhesive tape may decrease.
  • the preferred content of 2-ethylhexyl acrylate in the total monomer mixture is 10 to 40% by weight. If the content of 2-ethylhexyl acrylate is less than 10% by weight, the adhesive strength of the acrylic pressure-sensitive adhesive layer may be reduced, and the shear adhesive strength of the double-sided pressure-sensitive adhesive tape may be reduced. When the content of 2-ethylhexyl acrylate exceeds 40% by weight, the acrylic pressure-sensitive adhesive layer becomes too soft and the cohesive strength is lowered, and the shear pressure-sensitive adhesive strength of the double-sided pressure-sensitive adhesive tape may be lowered.
  • the monomer mixture may contain other copolymerizable monomers other than butyl acrylate and 2-ethylhexyl acrylate as necessary.
  • examples of other polymerizable monomers that can be copolymerized include, for example, carbon number of alkyl groups such as methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, and isopropyl (meth) acrylate.
  • (Meth) acrylic acid alkyl ester having 1 to 3 carbon atoms such as (meth) acrylic acid alkyl ester, tridecyl methacrylate, stearyl (meth) acrylate, and the like, and (meth) acrylic acid hydroxyalkyl And functional monomers such as glycerin dimethacrylate, glycidyl (meth) acrylate, 2-methacryloyloxyethyl isocyanate, (meth) acrylic acid, itaconic acid, maleic anhydride, crotonic acid, maleic acid and fumaric acid.
  • the monomer mixture may be radically reacted in the presence of a polymerization initiator.
  • a method of radical reaction of the monomer mixture that is, a polymerization method
  • examples thereof include solution polymerization (boiling point polymerization or constant temperature polymerization), emulsion polymerization, suspension polymerization, bulk polymerization and the like.
  • the said polymerization initiator is not specifically limited, For example, an organic peroxide, an azo compound, etc. are mentioned.
  • organic peroxide examples include 1,1-bis (t-hexylperoxy) -3,3,5-trimethylcyclohexane, t-hexylperoxypivalate, t-butylperoxypivalate, 2,5 -Dimethyl-2,5-bis (2-ethylhexanoylperoxy) hexane, t-hexylperoxy-2-ethylhexanoate, t-butylperoxy-2-ethylhexanoate, t-butylperoxy Examples include isobutyrate, t-butylperoxy-3,5,5-trimethylhexanoate, and t-butylperoxylaurate.
  • the azo compound examples include azobisisobutyronitrile and azobiscyclohexanecarbonitrile. These polymerization initiators may be used alone or in combination of two or more.
  • the weight average molecular weight (Mw) of the said acrylic copolymer a preferable minimum is 400,000 and a preferable upper limit is 1 million.
  • the weight average molecular weight is less than 400,000, the cohesive force of the acrylic pressure-sensitive adhesive layer may be reduced, and the shear adhesive force of the double-sided pressure-sensitive adhesive tape may be reduced.
  • a weight average molecular weight exceeds 1 million, the adhesive force of the said acrylic adhesive layer may fall, and the shear adhesive force of a double-sided adhesive tape may fall.
  • a more preferable lower limit of the weight average molecular weight is 500,000, and a more preferable upper limit is 700,000.
  • a weight average molecular weight is a weight average molecular weight of standard polystyrene conversion by GPC (Gel Permeation Chromatography: gel permeation chromatography).
  • the acrylic pressure-sensitive adhesive layer may contain a tackifier resin.
  • tackifier resins include rosin ester resins, hydrogenated rosin resins, terpene resins, terpene phenol resins, coumarone indene resins, alicyclic saturated hydrocarbon resins, C5 petroleum resins, and C9 resins. Examples include petroleum resins and C5-C9 copolymer petroleum resins. These tackifying resins may be used alone or in combination of two or more.
  • content of the said tackifying resin is not specifically limited,
  • the preferable minimum with respect to 100 weight part of said acrylic copolymers is 10 weight part, and a preferable upper limit is 60 weight part.
  • the content of the tackifying resin is less than 10 parts by weight, the adhesive strength of the acrylic pressure-sensitive adhesive layer may be reduced, and the shear adhesive strength of the double-sided pressure-sensitive adhesive tape may be reduced.
  • the content of the tackifying resin exceeds 60 parts by weight, the acrylic pressure-sensitive adhesive layer is hardened, the adhesive strength or tack may be reduced, and the shear adhesive strength of the double-sided adhesive tape may be reduced.
  • a crosslinking structure is formed between the main chains of the resin (the acrylic copolymer and / or the tackifying resin) constituting the acrylic pressure-sensitive adhesive layer by adding a crosslinking agent.
  • a crosslinking agent is not specifically limited, For example, an isocyanate type crosslinking agent, an aziridine type crosslinking agent, an epoxy-type crosslinking agent, a metal chelate type crosslinking agent etc. are mentioned. Of these, isocyanate-based crosslinking agents are preferred.
  • the isocyanate group of the isocyanate-based cross-linking agent reacts with the alcoholic hydroxyl group in the resin constituting the acrylic pressure-sensitive adhesive layer, and the acrylic pressure-sensitive adhesive layer.
  • the cross-linking becomes loose. Accordingly, the acrylic pressure-sensitive adhesive layer can disperse the intermittently applied peeling stress, and the shear adhesive strength of the double-sided pressure-sensitive adhesive tape is further improved.
  • the addition amount of the crosslinking agent is preferably 0.01 to 10 parts by weight and more preferably 0.1 to 3 parts by weight with respect to 100 parts by weight of the acrylic copolymer.
  • the degree of cross-linking of the acrylic pressure-sensitive adhesive layer is preferably 5 to 40% by weight, because it may be easily peeled off from the adherend when a load in a large shear direction is applied, whether it is too high or too low. More preferred is 40% by weight, and particularly preferred is 15 to 35% by weight.
  • the thickness of the acrylic pressure-sensitive adhesive layer is not particularly limited, but the thickness of the single-sided acrylic pressure-sensitive adhesive layer is preferably 10 to 100 ⁇ m. When the thickness of the acrylic pressure-sensitive adhesive layer is less than 10 ⁇ m, the impact resistance or shear adhesive strength of the double-sided pressure-sensitive adhesive tape may be lowered. When the thickness of the acrylic pressure-sensitive adhesive layer exceeds 100 ⁇ m, the reworkability or removability of the double-sided pressure-sensitive adhesive tape may be impaired.
  • the double-sided pressure-sensitive adhesive tape of the present invention preferably has a total thickness of 50 to 400 ⁇ m. If the total thickness of the double-sided pressure-sensitive adhesive tape is less than 50 ⁇ m, the impact resistance or shear adhesive strength of the double-sided pressure-sensitive adhesive tape may be lowered. If the total thickness of the double-sided pressure-sensitive adhesive tape exceeds 400 ⁇ m, it may not be suitable for applications such as adhesive fixing of parts constituting portable electronic devices and adhesive fixing of automobile members.
  • the minimum with more preferable total thickness of a double-sided adhesive tape is 100 micrometers, and a more preferable upper limit is 300 micrometers.
  • a solution of an adhesive A is prepared by adding a solvent to an acrylic copolymer, a tackifier resin, and a cross-linking agent as necessary, and the solution of the adhesive A is applied to the surface of the substrate.
  • the acrylic adhesive layer A is formed by completely removing and removing the solvent.
  • a release film is overlaid on the formed acrylic pressure-sensitive adhesive layer A so that the release treatment surface faces the acrylic pressure-sensitive adhesive layer A.
  • a release film different from the above release film is prepared, the adhesive B solution is applied to the release treatment surface of the release film, and the solvent in the solution is completely removed by drying, thereby releasing the release film.
  • a laminated film in which the acrylic pressure-sensitive adhesive layer B is formed on the surface of the mold film is produced.
  • the obtained laminated film is superposed on the back surface of the base material on which the acrylic pressure-sensitive adhesive layer A is formed, with the acrylic pressure-sensitive adhesive layer B facing the back surface of the base material to produce a laminate.
  • a double-sided pressure-sensitive adhesive tape having an acrylic pressure-sensitive adhesive layer on both surfaces of the base material and having the surface of the acrylic pressure-sensitive adhesive layer covered with a release film can be obtained. it can.
  • two sets of laminated films are produced in the same manner, and a laminated body is produced by superposing these laminated films on both sides of the base material with the acrylic adhesive layer of the laminated film facing the base material. Then, by pressing this laminate with a rubber roller or the like, a double-sided pressure-sensitive adhesive tape having an acrylic pressure-sensitive adhesive layer on both surfaces of the base material and the surface of the acrylic pressure-sensitive adhesive layer covered with a release film can be obtained. Good.
  • the use of the double-sided pressure-sensitive adhesive tape of the present invention is not particularly limited, it can be used for bonding and fixing parts constituting a portable electronic device to the device main body, and can be used for bonding and fixing an automobile member to the vehicle main body.
  • the double-sided pressure-sensitive adhesive tape of the present invention can be used for adhesive fixing of components in large-sized portable electronic devices, adhesive fixing of automobile members (for example, in-vehicle panels), and the like.
  • the shape of the double-sided pressure-sensitive adhesive tape of the present invention in these applications is not particularly limited, and examples thereof include a rectangle, a frame shape, a circle, an ellipse, and a donut shape.
  • the double-sided adhesive tape excellent in the shear adhesive force used for the adhesion fixation of the components which comprise a portable electronic device, the adhesion fixation of a motor vehicle member, etc. can be provided.
  • a reactor equipped with a thermometer, a stirrer, and a condenser tube is 70 parts by weight of butyl acrylate, 27 parts by weight of 2-ethylhexyl acrylate, 3 parts by weight of acrylic acid, 0.2 parts by weight of 2-hydroxyethyl acrylate, and 80 parts by weight of ethyl acetate.
  • the reactor was heated to start refluxing.
  • 0.1 part by weight of azobisisobutyronitrile was added as a polymerization initiator in the reactor.
  • the solution was refluxed at 70 ° C. for 5 hours to obtain a solution of the acrylic copolymer (a).
  • a pressure-sensitive adhesive (F) was obtained in the same manner as the pressure-sensitive adhesive (A) except that 15 parts by weight of a polymerized rosin ester having a softening point of 150 ° C. was used as the tackifier resin.
  • a pressure-sensitive adhesive (G) was obtained in the same manner as the pressure-sensitive adhesive (A) except that 10 parts by weight of the ester was used.
  • a pressure-sensitive adhesive (H) was obtained in the same manner as the pressure-sensitive adhesive (A) except that 10 parts by weight of a polymerized rosin ester having a softening point of 150 ° C. and 8 parts by weight of a rosin ester having a softening point of 100 ° C. were used as the tackifier resin. .
  • a pressure-sensitive adhesive (J) was obtained in the same manner as the pressure-sensitive adhesive (A) except that 15 parts by weight of ester was used.
  • polyolefin foam (A) 100 parts by weight of a linear low density polyethylene (exon chemical company, trade name “Exact3027”, density: 0.900 g / cm 3 ) as a polyolefin-based resin, 2 parts by weight of azodicarbonamide as a thermally decomposable foaming agent, 1 part by weight of zinc oxide as a decomposition temperature adjusting agent and 0.5 part by weight of 2,6-di-t-butyl-p-cresol as an antioxidant are supplied to an extruder and melt-kneaded at 130 ° C., A long sheet-like polyolefin resin composition having a thickness of about 0.3 mm was extruded.
  • a linear low density polyethylene exon chemical company, trade name “Exact3027”, density: 0.900 g / cm 3
  • azodicarbonamide as a thermally decomposable foaming agent
  • zinc oxide as a decomposition temperature adjusting agent
  • the polyolefin resin composition in the form of a long sheet is cross-linked by irradiating 4.5 Mrad of an electron beam with an acceleration voltage of 500 kV on both sides, and then maintained in a foaming furnace maintained at 250 ° C. with hot air and an infrared heater.
  • Polyolefin foam having a thickness of 0.14 mm by continuously feeding to foam and heating and foaming, and by stretching the foam with a stretch ratio of MD of 1.5 times and a stretch ratio of TD of 2.0 times (A) was obtained.
  • the density and interlayer strength of the obtained foam were measured.
  • the density of the polyolefin foam was measured and calculated using an electronic hydrometer (trade name “ED120T”) manufactured by Mirage in accordance with JISK-6767.
  • the interlayer strength of the polyolefin foam was measured by the measurement method shown in FIG. 1 as described above.
  • a polyolefin foam (B) was obtained in the same manner as in the production of the polyolefin foam (A) except that the draw ratio of TD was 2.2 times. The density and interlayer strength of the obtained foam were measured.
  • a polyolefin foam (C) was obtained in the same manner as in the production of the polyolefin foam (A) except that the amount of azodicarbonamide to be blended was 2.2 parts by weight and the draw ratio of TD was 1.8 times. The density and interlayer strength of the obtained foam were measured.
  • a polyolefin foam (D) was obtained in the same manner as in the production of the polyolefin foam (A) except that the amount of azodicarbonamide to be blended was 1.9 parts by weight and the draw ratio of TD was 1.9 times. The density and interlayer strength of the obtained foam were measured.
  • a polyolefin foam (E) was obtained in the same manner as in the production of the polyolefin foam (A) except that the amount of azodicarbonamide to be blended was 3 parts by weight and the draw ratio of TD was 3 times. The density and interlayer strength of the obtained foam were measured.
  • a polyolefin foam (F) was obtained in the same manner as in the production of the polyolefin foam (A) except that the amount of azodicarbonamide to be blended was 2.8 parts by weight and the draw ratio of TD was 2.8 times. The density and interlayer strength of the obtained foam were measured.
  • Example 1 A release paper having a thickness of 150 ⁇ m was prepared, an adhesive (J) was applied to the release-treated surface of the release paper, and dried at 100 ° C. for 5 minutes to form an acrylic adhesive layer having a thickness of 50 ⁇ m.
  • This acrylic pressure-sensitive adhesive layer was bonded to the surface of the polyolefin foam (A).
  • the same acrylic pressure-sensitive adhesive layer as above was bonded to the opposite surface of the polyolefin foam.
  • curing was performed by heating at 40 ° C. for 48 hours. This obtained the double-sided adhesive tape of the total thickness shown in Table 1 covered with the 150-micrometer-thick release paper.
  • the acrylic pressure-sensitive adhesive layer was measured from ⁇ 40 ° C. to 140 ° C.
  • Example 2 Example 1 except that the type of the pressure-sensitive adhesive was changed to the pressure-sensitive adhesive (A), and the acrylic pressure-sensitive adhesive layer having a storage elastic modulus G ′ and a loss elastic modulus G ′′ at 20 ° C. shown in Table 1 was changed. Similarly, a double-sided adhesive tape was obtained.
  • Example 3 A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 2 except that the polyolefin foam (B) was changed to one having the density, thickness and interlayer strength shown in Table 1 by changing the type of the polyolefin foam. It was.
  • Example 4 In the same manner as in Example 3, except that the polyolefin foam was changed to one having the density, thickness and interlayer strength shown in Table 1 by changing the type of polyolefin foam to polyolefin foam (C). An adhesive tape was obtained.
  • Example 5 Example 4 except that the acrylic adhesive layer having the storage elastic modulus G ′ and the loss elastic modulus G ′′ at 20 ° C. shown in Table 1 was changed by changing the type of the adhesive to the adhesive (B). Similarly, a double-sided adhesive tape was obtained.
  • Example 6 Example 4 except that the type of the pressure-sensitive adhesive was changed to the pressure-sensitive adhesive (C), and the acrylic pressure-sensitive adhesive layer having a storage elastic modulus G ′ and a loss elastic modulus G ′′ at 20 ° C. shown in Table 1 was changed. Similarly, a double-sided adhesive tape was obtained.
  • Example 7 By changing the type of polyolefin foam to polyolefin foam (D), the polyolefin foam is changed to one having the density, thickness and interlayer strength shown in Table 1, and the type of pressure-sensitive adhesive is changed to pressure-sensitive adhesive (D).
  • a double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 3 except that the acrylic pressure-sensitive adhesive layer having a storage elastic modulus G ′ and a loss elastic modulus G ′′ at 20 ° C. shown in Table 1 was changed.
  • Example 8 By changing the type of polyolefin foam to polyolefin foam (D), the polyolefin foam is changed to one having the density, thickness and interlayer strength shown in Table 1, and the type of pressure-sensitive adhesive is changed to pressure-sensitive adhesive (E).
  • a double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 3 except that the acrylic pressure-sensitive adhesive layer having a storage elastic modulus G ′ and a loss elastic modulus G ′′ at 20 ° C. shown in Table 1 was changed.
  • Example 1 By changing the type of polyolefin foam to polyolefin foam (E), the polyolefin foam is changed to one having the density, thickness and interlayer strength shown in Table 2, and the type of pressure-sensitive adhesive is changed to pressure-sensitive adhesive (F).
  • a double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 3 except that the acrylic pressure-sensitive adhesive layer having a storage elastic modulus G ′ and a loss elastic modulus G ′′ at 20 ° C. shown in Table 2 was changed.
  • Comparative Example 2 Comparative Example 1 with the exception of changing the adhesive type to an adhesive (G) and changing to an acrylic adhesive layer having a storage elastic modulus G ′ and a loss elastic modulus G ′′ at 20 ° C. shown in Table 2 Similarly, a double-sided adhesive tape was obtained.
  • Comparative Example 3 By changing the type of the polyolefin foam to the polyolefin foam (F), the polyolefin foam was changed to one having the density, thickness and interlayer strength shown in Table 2, and the both sides were the same as in Comparative Example 1. An adhesive tape was obtained.
  • Example 4 Example 4 with the exception that the pressure-sensitive adhesive (H) was changed to an acrylic pressure-sensitive adhesive layer having a storage elastic modulus G ′ and a loss elastic modulus G ′′ at 20 ° C. shown in Table 2 by changing the type of the pressure-sensitive adhesive. Similarly, a double-sided adhesive tape was obtained.
  • FIG. 2 is a schematic diagram showing a method for measuring the shear adhesive strength of a double-sided adhesive tape.
  • two 2 mm-thick polycarbonate plates (PC plates) 3 are bonded with double-sided adhesive tape (vertical 1 cm ⁇ width 1 cm) 4, pressed with 5 kg for 10 seconds, and then allowed to stand at 23 ° C. for 24 hours.
  • double-sided adhesive tape vertical 1 cm ⁇ width 1 cm
  • a test piece was prepared.
  • two 20 mm-thick polycarbonate plates (PC plates) 3 having a thickness of 2 mm are peeled off at a rate of 10 mm / min in the shear direction of the double-sided pressure-sensitive adhesive tape 4 (arrow direction in FIG. 2).
  • the maximum value of force was defined as shear adhesive strength.
  • shear adhesive strength was 175 N / cm 2 or more ⁇ , 100 N / cm 2 or more, the case was less than 175 N / cm 2 ⁇ , was determined as ⁇ when was less than 100 N / cm 2. Moreover, the peeling state was observed and it was evaluated whether peeling mode was interface peeling or delamination.
  • the double-sided adhesive tape excellent in the shear adhesive force used for the adhesion fixation of the components which comprise a portable electronic device, the adhesion fixation of a motor vehicle member, etc. can be provided.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

La présente invention concerne une bande adhésive double face d'une excellente force adhésive en cisaillement à utiliser pour l'adhésion et la fixation de pièces adaptées à des dispositifs électroniques portables, l'adhésion et la fixation de composants de véhicule, etc. La présente invention concerne une bande adhésive double face présentant une couche adhésive acrylique sur les deux surfaces d'un substrat, où : le substrat est constitué de mousse et sa force d'intercouche est de 10 N/5 mm à 30 N/5 mm ; et pour au moins l'une des couches adhésives acryliques, le module de stockage G' à 20 °C est d'au moins 2,5 x 105 Pa et le module de perte G" à 20 °C est d'au moins 2 x 105 Pa.
PCT/JP2016/059895 2016-01-21 2016-03-28 Bande adhésive double face WO2017126135A1 (fr)

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JP2019099635A (ja) * 2017-11-30 2019-06-24 日東電工株式会社 粘着シート
JP2019099806A (ja) * 2017-12-04 2019-06-24 積水化学工業株式会社 両面粘着テープ
WO2021106997A1 (fr) * 2019-11-26 2021-06-03 積水化学工業株式会社 Ruban autoadhésif double face
JP7115623B1 (ja) 2021-12-02 2022-08-09 東洋インキＳｃホールディングス株式会社 電子機器部品固定用発泡粘着テープ、および電子機器部品固定用発泡粘着テープを用いた電子機器。

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JP5249625B2 (ja) 2008-04-15 2013-07-31 積水化学工業株式会社 表示装置前板用粘着シート
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JP2012072393A (ja) * 2010-08-31 2012-04-12 Sekisui Plastics Co Ltd 発泡粘着シート
JP2016069611A (ja) * 2014-09-29 2016-05-09 積水化学工業株式会社 両面粘着テープ

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Publication number Priority date Publication date Assignee Title
JP2019099635A (ja) * 2017-11-30 2019-06-24 日東電工株式会社 粘着シート
JP7125259B2 (ja) 2017-11-30 2022-08-24 日東電工株式会社 粘着シート
JP2019099806A (ja) * 2017-12-04 2019-06-24 積水化学工業株式会社 両面粘着テープ
JP7260999B2 (ja) 2017-12-04 2023-04-19 積水化学工業株式会社 両面粘着テープ
WO2021106997A1 (fr) * 2019-11-26 2021-06-03 積水化学工業株式会社 Ruban autoadhésif double face
CN113924350A (zh) * 2019-11-26 2022-01-11 积水化学工业株式会社 双面粘合带
JP7115623B1 (ja) 2021-12-02 2022-08-09 東洋インキＳｃホールディングス株式会社 電子機器部品固定用発泡粘着テープ、および電子機器部品固定用発泡粘着テープを用いた電子機器。
JP2023082458A (ja) * 2021-12-02 2023-06-14 東洋インキＳｃホールディングス株式会社 電子機器部品固定用発泡粘着テープ、および電子機器部品固定用発泡粘着テープを用いた電子機器。

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