WO2017131082A1 - 両面粘着テープ - Google Patents

両面粘着テープ Download PDF

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Publication number
WO2017131082A1
WO2017131082A1 PCT/JP2017/002712 JP2017002712W WO2017131082A1 WO 2017131082 A1 WO2017131082 A1 WO 2017131082A1 JP 2017002712 W JP2017002712 W JP 2017002712W WO 2017131082 A1 WO2017131082 A1 WO 2017131082A1
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WO
WIPO (PCT)
Prior art keywords
sensitive adhesive
double
adhesive tape
weight
foam
Prior art date
Application number
PCT/JP2017/002712
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
真理子 野田
徳之 内田
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 JP2017507892A priority Critical patent/JPWO2017131082A1/ja
Priority to CN201780002216.3A priority patent/CN107709492A/zh
Priority to KR1020177036800A priority patent/KR20180101167A/ko
Publication of WO2017131082A1 publication Critical patent/WO2017131082A1/ja

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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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 that is thin but excellent in shock absorption and removability.
  • 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.
  • the double-sided adhesive tape used is also required to be thinner.
  • the double-sided pressure-sensitive adhesive tape having a base material made of a conventional foam is thinned, there is a problem that the strength of the base material is lowered and the tape is easily delaminated. Further, when the strength of the substrate is lowered, the tape is excessively stretched when the tape is pulled, and therefore there is a problem that the removability is poor.
  • An object of the present invention is to provide a double-sided pressure-sensitive adhesive tape that is thin but excellent in impact absorption and removability.
  • the present invention is a double-sided pressure-sensitive adhesive tape having an acrylic pressure-sensitive adhesive layer on both sides of a base material made of polyolefin foam, wherein the base material made of the polyolefin foam has a thickness of 50 to 120 ⁇ m, and is made of the polyolefin foam.
  • the double-sided pressure-sensitive adhesive tape has an average cell diameter in the MD direction and TD direction of the substrate of 30 ⁇ m or more and 70 ⁇ m or less, and the total thickness of the double-sided pressure-sensitive adhesive tape is 80 to 150 ⁇ m.
  • the present inventors have determined the average cell diameter of the base material in the double-sided pressure-sensitive adhesive tape having an acrylic pressure-sensitive adhesive layer on both surfaces of the base material made of polyolefin foam. It has been found that the strength can be ensured even when the substrate is made thinner by making it smaller than the conventional substrate. As a result, the present inventors have found that a double-sided pressure-sensitive adhesive tape that is thin and excellent in impact absorption and removability can be obtained despite having a base material made of foam, and has completed the present invention.
  • the double-sided pressure-sensitive adhesive tape of the present invention has a base material (hereinafter also simply referred to as “base material”) made of a polyolefin foam.
  • base material a base material
  • a polyolefin foam As a base material, it is possible to impart impact absorbability to the double-sided pressure-sensitive adhesive tape obtained.
  • the polyolefin foam is not particularly limited as long as it is a polyolefin foam that satisfies the average cell diameter in the MD direction and TD direction, which will be described later, and examples thereof include a polyethylene foam, a polypropylene foam, and an ethylene-propylene foam. It is done. Among these, a polyethylene foam is preferable.
  • the base material has a lower limit of 50 ⁇ m and an upper limit of 120 ⁇ m.
  • the double-sided pressure-sensitive adhesive tape of the present invention has a base material made of a foam, the strength of the base material can be ensured even when the thickness is thin, so that delamination does not easily occur even if the thickness is reduced. Also excellent in removability.
  • the minimum with the preferable thickness of the said base material is 60 micrometers, and a preferable upper limit is 100 micrometers.
  • the polyolefin foam has an average cell diameter in the MD direction and TD direction of 30 ⁇ m or more and 70 ⁇ m or less.
  • the polyolefin foam has a small average cell diameter of 30 ⁇ m or more and 70 ⁇ m or less, so that the strength can be maintained even when the substrate is thinned, while both impact absorption and removability are compatible.
  • a thin double-sided adhesive tape can be obtained.
  • a preferable lower limit of the average cell diameter of the polyolefin foam is 35 ⁇ m, and a more preferable lower limit is 40 ⁇ m.
  • the preferable upper limit of the average bubble diameter is 65 ⁇ m, and the more preferable upper limit is 55 ⁇ m.
  • a method of reducing the average bubble diameter includes a method of pressurizing a resin before foaming.
  • pressurizing the resin before foaming it is possible to suppress the growth of bubbles during foaming.
  • the bubble diameter in MD direction and TD direction can be reduced as the stretch ratio in the MD direction and TD direction at the time of foaming is small, foaming is achieved by reducing the thickness of the resin by applying pressure before foaming. While suppressing the stretching at the time, the substrate can be made thin and the bubbles can be reduced.
  • MD direction Machine Direction
  • TD direction Transverse Direction
  • the average cell diameter in the MD direction can be measured by the following method. First, a sample of polyolefin foam is cut into a 50 mm square, immersed in liquid nitrogen for 1 minute, and then cut along a plane parallel to the MD direction and the thickness direction with a razor blade. Next, using a digital microscope (for example, “VHX-900” manufactured by Keyence Co., Ltd.), a magnified photograph was taken at a magnification of 200 times, and all bubbles present on the cut surface having a length of 2 mm in the MD direction were MD. Measure the bubble size in the direction. The operation is repeated 5 times, and the average value of the bubble diameters in all MD directions is defined as the average bubble diameter in the MD direction.
  • the average cell diameter in the TD direction can also be measured in the same manner except that the polyolefin foam sample is cut along a plane parallel to the TD direction and the thickness direction.
  • the average bubble diameter in the MD direction and the average bubble diameter in the TD direction may be specified as follows. That is, first, in the polyolefin foam sample, one arbitrary direction perpendicular to the thickness direction is selected as the first direction, and the first direction and the direction perpendicular to the thickness direction are defined as the second direction. Next, a sample of the polyolefin foam is cut along a plane parallel to the first direction and the thickness direction, and the average cell diameter in the first direction is measured in the same manner as in the measurement method. The obtained average bubble diameter is treated as the average bubble diameter in the MD direction. Further, except that the polyolefin foam sample was cut along a plane parallel to the second direction and the thickness direction, the measurement was performed in the same manner as the measurement method described above, and the average cell diameter obtained was the average in the TD direction. Treat as bubble size.
  • one or two bubbles in the polyolefin foam are included in the thickness direction of the polyolefin foam.
  • one or two bubbles having the average cell diameter in the thickness direction in the base material it is easy to ensure strength even when the base material is thinned.
  • the lower limit of the expansion ratio of the polyolefin foam is preferably 1.4 cm 3 / g and the upper limit is 2.0 cm 3 / g.
  • the expansion ratio of the base material is 1.4 cm 3 / g or more, the flexibility and impact absorbability of the double-sided pressure-sensitive adhesive tape can be improved.
  • the expansion ratio of the substrate is 2.0 cm 3 / g or less, the strength of the substrate is increased, delamination can be prevented, and a double-sided pressure-sensitive adhesive tape excellent in removability can be obtained.
  • the expansion ratio can be calculated as the reciprocal of the density measured using an electronic hydrometer (for example, “ED120T” manufactured by Mirage Co., Ltd.) in accordance with JISK-6767.
  • the base material which consists of a polyolefin foam whose average cell diameter of the said MD direction and TD direction is 30 micrometers or more and 70 micrometers or less can be manufactured by passing through the following processes, for example.
  • a polyolefin resin composition made into a sheet by feeding a polyolefin resin, a pyrolytic foaming agent, and other additives to an extruder, melt-kneading, and extruding the sheet from the extruder. Obtaining step.
  • the polyolefin foam can be produced by a method described in International Publication No. 2005/007731.
  • the polyolefin-based resin examples include a polyethylene-based resin and a polypropylene-based resin, and among them, a polyethylene-based resin is preferable.
  • the polyethylene resin may be an ethylene homopolymer, but is preferably an ethylene- ⁇ -olefin copolymer obtained by copolymerizing ethylene and a small amount of ⁇ -olefin.
  • the polyethylene resin By using the polyethylene resin as a copolymer of ethylene and a small amount of ⁇ -olefin, the flexibility of the foam can be increased and the shock absorption can be further increased.
  • the ethylene- ⁇ -olefin copolymers linear low density polyethylene is more preferable.
  • Examples of the ⁇ -olefin in the ethylene- ⁇ -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 upper limit of the ⁇ -olefin in the ethylene- ⁇ -olefin copolymer is 30% by weight, and the more preferable upper limit is 10% by weight.
  • an ethylene-vinyl acetate copolymer is also preferable.
  • the ethylene-vinyl acetate copolymer is usually a copolymer containing 50% by weight or more of structural units derived from ethylene.
  • the polyethylene resin preferably has a low density from the viewpoint of enhancing the flexibility of the foam and enhancing the impact absorption.
  • 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.
  • Examples of the polypropylene resin used as a raw material for the polypropylene foam include a propylene homopolymer and a propylene- ⁇ -olefin copolymer containing 50% by weight or more of a structural unit derived from propylene. These may be used alone or in combination of two or more.
  • Examples of the ⁇ -olefin in the propylene- ⁇ -olefin copolymer 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 in the polyolefin resin composition is a polyethylene resin polymerized by using a metallocene compound, a Ziegler-Natta compound, a chromium oxide compound or the like as a catalyst from the viewpoint of improving flexibility and impact absorption.
  • 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 polyolefin 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 a tetravalent transition metal or a ligand examples include, for example, cyclopentadienyl titanium tris (dimethylamide), methylcyclopentadienyl titanium tris (dimethylamide), bis (cyclopentadienyl) titanium dichloride, Examples thereof include dimethylsilyltetramethylcyclopentadienyl-tert-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 thermally decomposable foaming agent in the polyolefin resin composition is preferably 1 to 12 parts by weight and more preferably 1 to 8 parts by weight with respect to 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-based resin composition is improved, and it becomes easy to obtain a polyolefin foam having a desired foaming ratio, as well as tensile strength and compression. Recoverability can be improved.
  • Examples of the additive include a decomposition temperature adjusting agent, a crosslinking aid, and an antioxidant.
  • the said decomposition temperature regulator adjusts the surface state etc. of a foam by lowering
  • 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 to be irradiated in the step of crosslinking the polyolefin resin composition, which will be described later, and to cleave the resin molecules accompanying the irradiation of ionizing radiation. This is to prevent deterioration.
  • 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 polyolefin 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 polyolefin 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.
  • the polyolefin resin composition is irradiated with ionizing radiation such as electron beam, ⁇ ray, ⁇ ray, and ⁇ ray. And a method in which an organic peroxide is blended in advance when the polyolefin resin composition is formed, 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.
  • the gel fraction (crosslinking degree) of a polyolefin-type resin composition can be measured as follows. That is, about 50 mg of a test piece is taken from the polyolefin foam, and the weight A (mg) of the test piece is precisely weighed. Next, this test piece was immersed in 30 cm 3 of xylene at 105 ° C.
  • Examples of the organic peroxide in the method of previously blending an organic peroxide into the polyolefin resin composition include 1,1-bis (t-butylperoxy) 3,3,5-trimethylcyclohexane, 1, Examples thereof include 1-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.
  • the amount of the organic peroxide is within the above range, the crosslinking of the polyolefin resin composition is likely to proceed, and the amount of the organic peroxide decomposition residue present in the resulting polyolefin foam is reduced. Can be suppressed.
  • the foaming method of 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, or heating with a salt bath.
  • a method of heating with an oil bath, etc. and these may be used in combination.
  • the foaming of the polyolefin-based resin composition is not limited to an example using a pyrolytic foaming agent, and physical foaming with butane gas or the like may be used.
  • the stretching may be performed after foaming the polyolefin resin composition to obtain a foam, or may be performed while foaming the polyolefin resin composition.
  • 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 foam is preferably 1.1 to 3.0 times, and more preferably 1.7 to 2.8 times.
  • the double-sided pressure-sensitive adhesive tape of the present invention has an acrylic pressure-sensitive adhesive layer on both sides of the substrate.
  • the thickness of the acrylic pressure-sensitive adhesive layer the thickness of the single-sided acrylic pressure-sensitive adhesive layer is preferably 50 ⁇ m or less.
  • the thickness of the acrylic pressure-sensitive adhesive layer is 50 ⁇ m or less, the impact resistance and shear adhesive strength of the double-sided pressure-sensitive adhesive tape can be compatible with the thinness of the double-sided pressure-sensitive adhesive tape.
  • a more preferable upper limit of the acrylic pressure-sensitive adhesive layer is 30 ⁇ m.
  • the minimum in particular of the thickness of the said acrylic adhesive layer is not restrict
  • 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 has appropriate softness and cohesion, and the shear pressure-sensitive adhesive force of the double-sided pressure-sensitive adhesive tape can be improved.
  • the acrylic pressure-sensitive adhesive layer has an appropriate hardness, and the adhesive strength or tack is increased so that the shear adhesive strength of the double-sided adhesive tape can be improved.
  • the preferred content of 2-ethylhexyl acrylate in the total monomer mixture is 10 to 40% by weight.
  • the adhesive strength of the acrylic pressure-sensitive adhesive layer is increased, and the shear adhesive strength of the double-sided pressure-sensitive adhesive tape can be improved.
  • the acrylic pressure-sensitive adhesive layer has appropriate softness and cohesion, and the shear pressure-sensitive adhesive strength of the double-sided pressure-sensitive adhesive tape can be improved.
  • 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.
  • a preferable minimum is 400,000 and a preferable upper limit is 2 million.
  • the weight average molecular weight is 400,000 or more, the cohesive force of the acrylic pressure-sensitive adhesive layer is improved, and the shear adhesive force of the double-sided pressure-sensitive adhesive tape can be further increased.
  • the weight average molecular weight is 2 million or less, the adhesive force of the acrylic pressure-sensitive adhesive layer is improved, and the shear adhesive force of the double-sided pressure-sensitive adhesive tape can be further increased.
  • a more preferable lower limit of the weight average molecular weight is 500,000, and a more preferable upper limit is 1,500,000.
  • 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 10 parts by weight or more, the adhesive strength of the acrylic pressure-sensitive adhesive layer is improved, and the shear adhesive strength of the double-sided pressure-sensitive adhesive tape can be further increased.
  • the content of the tackifying resin is 60 parts by weight or less, the acrylic pressure-sensitive adhesive layer has an appropriate hardness and the adhesive strength or tack is improved, and the shear adhesive strength of the double-sided pressure-sensitive adhesive tape can be further increased. .
  • 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 double-sided pressure-sensitive adhesive tape of the present invention has a total thickness of 80 to 150 ⁇ m.
  • the double-sided pressure-sensitive adhesive tape of the present invention can achieve both shock absorption and removability even when it is thin, despite having a base material made of a foam.
  • the minimum with the preferable total thickness of a double-sided adhesive tape is 90 micrometers, and a preferable upper limit is 100 micrometers.
  • the double-sided pressure-sensitive adhesive tape of the present invention preferably has a tensile strength in the MD direction of 12 N / 10 mm or more and a tensile strength in the TD direction of 8 N / 10 mm or more.
  • the double-sided pressure-sensitive adhesive tape of the present invention has a tensile strength in the MD direction and TD direction that is equal to or higher than the above lower limit, the double-sided pressure-sensitive adhesive tape does not extend excessively when peeled off, thereby improving the removability of the double-sided pressure-sensitive adhesive tape Can do.
  • a more preferable lower limit of the tensile strength in the MD direction is 13 N / 10 mm, and a preferable lower limit of the tensile strength in the TD direction is 9 N / 10 mm.
  • the upper limit of the tensile strength in the MD direction is not particularly limited, but a preferable upper limit is 25 N / 10 mm, and a more preferable upper limit is 20 N / 10 mm.
  • the upper limit of the tensile strength in the TD direction is not particularly limited, but the preferable upper limit is 15 N / 10 mm, and the more preferable upper limit is 12 N / 10 mm.
  • the elongation at this time is not particularly limited, but is preferably about 200 to 500%.
  • tensile strength can be measured by the method based on JISZ0237.
  • the tensile strength can be achieved by adjusting the average cell diameter of the base material and the degree of crosslinking and shear modulus of the acrylic pressure-sensitive adhesive layer.
  • 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 is used for bonding and fixing parts constituting portable electronic devices such as battery packs to the device main body, and used for bonding and fixing automobile members to the vehicle main body. (That is, used for fixing electronic device parts or for mounting on-vehicle parts) and the like are preferable.
  • 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 impact absorption and removability can be provided.
  • the long sheet-like polyolefin resin composition was crosslinked by irradiating 4.5 Mrad of an electron beam with an acceleration voltage of 500 kV on both sides thereof.
  • the cross-linked polyolefin resin composition was cut into 400 ⁇ 400 mm and pressed with a press machine until the thickness became about 150 ⁇ m.
  • the polyolefin resin composition after pressurization is continuously sent into a foaming furnace maintained at 250 ° C. with hot air and an infrared heater to be heated and foamed, and the draw ratio of MD is 1.3 times while foaming.
  • a base material (A) having a thickness of 60 ⁇ m was obtained by stretching the stretching ratio of TD at 2.0 times. The average cell diameter, density, and expansion ratio of the obtained substrate were measured.
  • a reactor equipped with a thermometer, stirrer, and condenser is 75 parts by weight of butyl acrylate, 21 parts by weight of 2-ethylhexyl acrylate, 3.8 parts by weight of acrylic acid, 0.2 part by weight of 2-hydroxyethyl acrylate, and acetic acid
  • 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).
  • the acrylic copolymer (b) having a weight average molecular weight of 1.4 million was the same as the acrylic copolymer (a) except that 62 parts by weight of butyl acrylate, 24 parts by weight of 2-ethylhexyl acrylate, and 10 parts by weight of ethyl acrylate were used. A solution was obtained.
  • a pressure-sensitive adhesive (B) was obtained in the same manner as the pressure-sensitive adhesive (A) except that the solution of the obtained acrylic copolymer (b) was used.
  • Example 1 A release paper having a thickness of 150 ⁇ m was prepared, the acrylic pressure-sensitive adhesive A was applied to the release-treated surface of the release paper, and dried at 100 ° C. for 5 minutes, thereby forming an acrylic pressure-sensitive adhesive layer having a thickness of 20 ⁇ m.
  • This acrylic pressure-sensitive adhesive layer was bonded to the surface of the polyolefin foam shown in Table 1.
  • the same acrylic pressure-sensitive adhesive layer as above was bonded to the opposite surface of the polyolefin foam. This obtained the double-sided adhesive tape with the total thickness of 100 micrometers covered with the release paper.
  • Examples 2 to 6, Comparative Examples 1 to 5 A double-sided pressure-sensitive adhesive tape was obtained in the same manner as in Example 1 except that the type of base material, the type of acrylic pressure-sensitive adhesive, and the thickness of one side of the acrylic pressure-sensitive adhesive layer were changed to those shown in the table.
  • the obtained double-sided adhesive tape was cut into a size of 10 mm ⁇ 200 mm to prepare a measurement sample. Subsequently, based on JISZ0237, the tensile test was done at the speed of 5 mm / sec, and tensile strength (N / 10mm) and elongation rate (%) were computed.
  • FIG. 1 the schematic diagram which shows the measuring method of the removability of a double-sided adhesive tape is shown.
  • the double-sided adhesive tape was cut into 10 mm ⁇ 60 mm.
  • the cut double-sided pressure-sensitive adhesive tape was attached to a polycarbonate (PC) plate having a thickness of 2 mm.
  • PC polycarbonate
  • the same PC plate as the one with the double-sided adhesive tape attached is attached so that the end of the PC plate is 1 cm from the end of the test piece, and after crimping at 5 kg for 10 seconds
  • the test piece was obtained by allowing to stand at 23 ° C. for 24 hours. Peel off the double-sided adhesive tape on the test piece after standing, and peel it off as “ ⁇ ” when it is peeled off without tearing along the way, and “ ⁇ ” when the double-sided adhesive tape is broken during peeling Sex was evaluated.
  • FIG. 2 shows a schematic diagram of a test device used for a drop impact test of double-sided pressure-sensitive adhesive tapes obtained in Examples and Comparative Examples.
  • the obtained double-sided adhesive tape was punched into an outer diameter of 46 mm, a length of 61 mm, an inner diameter of 44 mm, and a length of 59 mm to produce a frame-shaped test piece having a width of 1 mm.
  • the test piece 3 from which the release paper was peeled off from the polycarbonate plate 5 having a thickness of 38 mm and a square hole having a width of 38 mm and a length of 50 mm in the center portion was arranged so that the square hole was located in the center.
  • FIG. 3 shows a schematic diagram of a test method for a drop impact test of double-sided pressure-sensitive adhesive tapes obtained in Examples and Comparative Examples. As shown in FIG.
  • the produced test apparatus was turned over and fixed to the support base, and a 150 g iron weight 6 having a size passing through the square hole was dropped so as to pass through the square hole.
  • the height at which the iron weight 6 is dropped is gradually increased, and the height at which the iron weight 6 is dropped when the test piece 3 and the glass plate 4 are peeled off due to the impact applied by the dropping of the iron weight 6.
  • the measurement was made and the drop impact resistance was evaluated with “ ⁇ ” when the height of the iron weight 6 dropped was 30 cm or more and “X” when the height was less than 30 cm.
  • the double-sided adhesive tape excellent in impact absorption and removability can be provided.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)
PCT/JP2017/002712 2016-01-26 2017-01-26 両面粘着テープ WO2017131082A1 (ja)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019065191A (ja) * 2017-09-29 2019-04-25 積水化学工業株式会社 樹脂発泡シート、樹脂発泡シートの製造方法、及び粘着テープ
WO2019219519A1 (en) * 2018-05-15 2019-11-21 Tesa Se Sebum-proof foam tape for an electronic device
WO2020175368A1 (ja) * 2019-02-25 2020-09-03 積水化学工業株式会社 両面粘着テープ、電子機器部品及び電子機器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111057478B (zh) * 2018-10-17 2022-07-29 德莎欧洲股份公司 可无残留移除的易拉胶泡棉胶带及包含其的电子产品
WO2020218430A1 (ja) * 2019-04-24 2020-10-29 積水化学工業株式会社 粘着テープ
KR102172041B1 (ko) * 2019-06-13 2020-11-02 주식회사 신양 재박리형 점착제 및 점착제 재료의 제조방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013191106A1 (ja) * 2012-06-21 2013-12-27 Dic株式会社 粘着テープ
JP2015120876A (ja) * 2013-11-22 2015-07-02 日東電工株式会社 両面粘着シート
WO2016204074A1 (ja) * 2015-06-15 2016-12-22 日東電工株式会社 粘着シート

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009242541A (ja) 2008-03-31 2009-10-22 Sekisui Chem Co Ltd 衝撃吸収テープ
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
JP2010215805A (ja) * 2009-03-17 2010-09-30 Nitto Denko Corp 衝撃吸収材
TWI468485B (zh) * 2012-05-21 2015-01-11 Dainippon Ink & Chemicals 黏膠帶
JP6358825B2 (ja) * 2013-04-10 2018-07-18 日東電工株式会社 樹脂発泡複合体
JP6426887B2 (ja) * 2013-09-20 2018-11-21 積水化学工業株式会社 携帯電子機器用アクリル粘着剤及び携帯電子機器用両面粘着テープ
CN104650757A (zh) * 2013-11-22 2015-05-27 日东电工株式会社 双面粘合片
TWI640596B (zh) * 2014-03-13 2018-11-11 迪愛生股份有限公司 黏著片及電子設備
JP6470523B2 (ja) * 2014-08-08 2019-02-13 日東電工株式会社 粘着シート
JP2017002292A (ja) * 2015-06-15 2017-01-05 日東電工株式会社 粘着シート

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013191106A1 (ja) * 2012-06-21 2013-12-27 Dic株式会社 粘着テープ
JP2015120876A (ja) * 2013-11-22 2015-07-02 日東電工株式会社 両面粘着シート
WO2016204074A1 (ja) * 2015-06-15 2016-12-22 日東電工株式会社 粘着シート

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019065191A (ja) * 2017-09-29 2019-04-25 積水化学工業株式会社 樹脂発泡シート、樹脂発泡シートの製造方法、及び粘着テープ
JP7063566B2 (ja) 2017-09-29 2022-05-09 積水化学工業株式会社 樹脂発泡シート、樹脂発泡シートの製造方法、及び粘着テープ
WO2019219519A1 (en) * 2018-05-15 2019-11-21 Tesa Se Sebum-proof foam tape for an electronic device
WO2020175368A1 (ja) * 2019-02-25 2020-09-03 積水化学工業株式会社 両面粘着テープ、電子機器部品及び電子機器
JPWO2020175368A1 (ja) * 2019-02-25 2021-09-27 積水化学工業株式会社 両面粘着テープ、電子機器部品及び電子機器
JP7044878B2 (ja) 2019-02-25 2022-03-30 積水化学工業株式会社 両面粘着テープ、電子機器部品及び電子機器

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