WO2017082418A1 - Ruban adhésif - Google Patents

Ruban adhésif Download PDF

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Publication number
WO2017082418A1
WO2017082418A1 PCT/JP2016/083594 JP2016083594W WO2017082418A1 WO 2017082418 A1 WO2017082418 A1 WO 2017082418A1 JP 2016083594 W JP2016083594 W JP 2016083594W WO 2017082418 A1 WO2017082418 A1 WO 2017082418A1
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WO
WIPO (PCT)
Prior art keywords
pressure
sensitive adhesive
adhesive layer
adhesive tape
base material
Prior art date
Application number
PCT/JP2016/083594
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English (en)
Japanese (ja)
Inventor
茂樹 河邊
下川　大輔
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to EP16864379.9A priority Critical patent/EP3375834A4/fr
Priority to CN201680065866.8A priority patent/CN108350327A/zh
Priority to US15/772,174 priority patent/US20180316045A1/en
Priority claimed from JP2016220382A external-priority patent/JP6883973B2/ja
Publication of WO2017082418A1 publication Critical patent/WO2017082418A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to an adhesive tape.
  • a secondary battery includes an electrode member that includes a positive electrode, a negative electrode, and a porous separator disposed between the positive electrode and the negative electrode.
  • the electrode member it is necessary to fix the electrode (positive electrode, negative electrode) and the separator.
  • a method in which the end of the separator is fused to the electrode for example, Patent Document 1
  • the adhesive is directly coated on the separator.
  • a method of bonding the separator and the electrode for example, Patent Document 2 is known.
  • the method of fusing the end portions has a problem that the position of the electrode and the separator is likely to be shifted during battery manufacture, and a problem that the separator is easily contracted when the battery is used.
  • the adhesive may hinder the permeability of the electrolytic solution to the separator.
  • a drying process for a long time is needed, and there exists a problem that manufacturing efficiency worsens besides a separator being damaged by heating.
  • the present invention has been made in order to solve the above-described conventional problems, and the object of the present invention is to be used for fixing an electrode and a separator in the production of a secondary battery, and the permeability of the electrolyte solution to the separator It is providing the adhesive tape which can fix a separator and an electrode favorably, maintaining this.
  • the pressure-sensitive adhesive tape of the present invention comprises a first substrate and a pressure-sensitive adhesive layer formed on the first substrate so as to be peelable, and the pressure-sensitive adhesive layer is patterned. Is formed.
  • the pressure-sensitive adhesive tape of the present invention comprises a first substrate and a pressure-sensitive adhesive laminate formed on the first substrate so as to be peelable.
  • a pressure-sensitive adhesive layer is formed by patterning, including a base material and a pressure-sensitive adhesive layer formed on both sides of the second base material.
  • the above-mentioned adhesive layer contains a heat welding type adhesive.
  • the pressure-sensitive adhesive layer includes a pressure-sensitive adhesive having a swelling degree with respect to the non-aqueous electrolyte solution of 5 to 200%.
  • the pressure-sensitive adhesive layer is formed in a dot shape. In one embodiment, the area ratio of the pressure-sensitive adhesive layer is 5% to 90% with respect to the area of the first base material. In one embodiment, the pressure-sensitive adhesive layer has a thickness of 1 ⁇ m to 30 ⁇ m. In one embodiment, the tack value in 25 degreeC of the said adhesive layer is 10 N or less. In one embodiment, the peeling force in 23 degreeC at the time of peeling a said 1st base material from the said adhesive layer is 2.00 N / 50mm or less. In one embodiment, the said adhesive tape is stuck and used for a separator at the time of non-aqueous secondary battery manufacture.
  • the pressure-sensitive adhesive tape of the present invention is configured such that a patterned pressure-sensitive adhesive layer can be transferred to an adherend.
  • the adhesive tape which can fix a separator and an electrode favorably can be obtained, maintaining the permeability of the electrolyte solution with respect to a separator.
  • a separator and an electrode can be fixed simply and easily, and the production efficiency in battery manufacture can be improved.
  • (A) is a schematic plan view of the adhesive tape by one Embodiment of this invention
  • (b) is a schematic sectional drawing of the adhesive tape by one embodiment of this invention. It is a schematic sectional drawing of the adhesive tape by one Embodiment of this invention. It is a schematic plan view which shows the example of the pattern shape of the adhesion layer in one embodiment of this invention.
  • FIG. 1 (b) is a schematic plan view of a pressure-sensitive adhesive tape according to one embodiment of the present invention
  • FIG. 1 (b) a schematic sectional view of a pressure-sensitive adhesive tape according to one embodiment of the present invention It is.
  • the pressure-sensitive adhesive tape 100 includes a first base material 10 and a pressure-sensitive adhesive layer 21.
  • the pressure-sensitive adhesive layer 21 is detachably formed on the first base material 10.
  • the pressure-sensitive adhesive layer 21 is formed by patterning on the first base material 10.
  • “Peelable” means that the pressure-sensitive adhesive layer 21 can be transferred to an adherend (eg, a polypropylene film).
  • the adhesive tape of the present invention may be provided with a release liner on the outside of the adhesive layer for the purpose of protecting the adhesive surface until it is used.
  • FIG. 2 is a schematic sectional view of an adhesive tape according to another embodiment of the present invention.
  • the pressure-sensitive adhesive tape 200 includes a first base material 10 and a pressure-sensitive adhesive laminate 20 that is detachably formed on the first base material.
  • the pressure-sensitive adhesive laminate 20 includes a second base material 22 and pressure-sensitive adhesive layers 21 and 21 ′ formed on both sides of the second base material 22. Also in this adhesive tape 200, the adhesive layer is formed in a pattern.
  • a release liner may be provided outside the pressure-sensitive adhesive layer for the purpose of protecting the pressure-sensitive adhesive surface until it is used.
  • the pressure-sensitive adhesive tape of the present invention can be used for bonding two adherends together. More specifically, after the pressure-sensitive adhesive tape is attached to one adherend (for example, a separator), the first base material is peeled off to transfer the pressure-sensitive adhesive layer to the adherend. The other adherend (for example, electrode) is laminated on the adhesive layer thus transferred, and the two adherends are bonded together.
  • the pressure-sensitive adhesive tape of the present invention is used by being attached to a separator (for example, a separator made of polypropylene, polyethylene, etc.) at the time of manufacturing a secondary battery (for example, a non-aqueous secondary battery).
  • this separator and an electrode (for example, the positive electrode for non-aqueous batteries, a negative electrode, etc.) can be bonded together.
  • the adherend can be bonded without depending on the pressure-sensitive adhesive coating, and the bonding process can be simplified.
  • the pressure-sensitive adhesive layer is patterned in the pressure-sensitive adhesive tape of the present invention.
  • the separator used in the battery is made porous so that ions can move.
  • the adhesive tape of the present invention in which the adhesive layer is patterned is used to separate the separator. This prevents the pores from being blocked and maintains the permeability of the electrolyte to the separator.
  • a separator and an electrode can be fixed favorably. Furthermore, the shrinkage of the separator during battery use can be effectively prevented.
  • the peeling force at 23 ° C. when peeling the first substrate from the pressure-sensitive adhesive layer is preferably 2.00 N / 50 mm or less, more preferably 0.01 to 1.00 N / 50 mm. is there. If it is such a range, the adhesive tape which can be favorably transferred with respect to a separator or an electrode can be obtained.
  • the “peeling force at 23 ° C. when peeling the first substrate from the adhesive layer” can be measured with an existing tensile tester such as Autograph AG-I manufactured by Shimadzu Corporation. It is measured under conditions of speed: 300 mm / min and peeling angle: 180 °.
  • the shear adhesive force at 25 ° C. when the electrode sheet of the nonaqueous battery and the porous film are bonded together by the adhesive layer (patterned adhesive layer) constituting the adhesive tape of the present invention is preferably 1 0.85 N / cm 2 or more, more preferably 2.00 N / cm 2 or more.
  • the shear adhesive force is less than 1.85 N / cm 2 , problems such as separation of the separator and electrode and separation of these members may occur during the non-aqueous battery manufacturing process.
  • the higher the shear adhesive force, the better, but the upper limit is, for example, 500 N / cm 2 .
  • the pressure-sensitive adhesive layer is formed without unevenness by patterning, the pressure-sensitive adhesive layer is excellent in shear adhesive strength.
  • the shear adhesive strength can be measured with an existing tensile tester such as Autograph AG-I manufactured by Shimadzu Corporation.
  • a porous film is used as a separator, and the porosity is generally 30 to 80%.
  • the porosity change of the porous sheet (porosity before transfer (%) ⁇ porosity after transfer (% )) Is preferably 50% or less, more preferably 0% to 30%.
  • the air permeability of the separator can be maintained by forming the patterned pressure-sensitive adhesive layer.
  • the pressure-sensitive adhesive layer is formed by patterning.
  • the pattern shape any appropriate shape can be taken as long as the pressure-sensitive adhesive layer is formed so as to cover only a part of the first substrate.
  • Examples of the pattern shape of the pressure-sensitive adhesive layer include dot shapes (FIGS. 3A to 3E), stripe shapes (FIG. 3F), lattice shapes (FIG. 3G), hairline shapes, and the like. A combination etc. are mentioned.
  • the pattern-shaped components (for example, dots forming a dot shape, lines forming a stripe shape or a lattice shape) are preferably distributed over the entire area of the first substrate.
  • the pressure-sensitive adhesive layer may be formed in a dot shape.
  • Such an adhesive layer pattern can be formed, for example, by spraying an adhesive.
  • the distance between the dots is, for example, 0.1 to 100 mm, and preferably 1 to 50 mm. If it is such a range, when the adhesive layer is transferred to the separator, the pores of the separator are more effectively prevented from being blocked, and the permeability of the electrolytic solution to the separator can be increased.
  • the separator since the pressure-sensitive adhesive layer is formed without unevenness by patterning the pressure-sensitive adhesive layer, the separator can be prevented from shrinking.
  • the area ratio of the pressure-sensitive adhesive layer is preferably 5% to 90%, more preferably 10% to 80%, still more preferably 20% to the area of the first substrate. 50%.
  • the pores of the separator are prevented from being blocked, and the permeability of the electrolytic solution to the separator is maintained.
  • the thickness of the pressure-sensitive adhesive layer is preferably 1 ⁇ m to 30 ⁇ m, more preferably 3 ⁇ m to 10 ⁇ m. If it is such a range, the adhesive layer which is excellent in the adhesive force with respect to an electrode and a separator can be formed.
  • the tack value at 25 ° C. of the pressure-sensitive adhesive layer constituting the pressure-sensitive adhesive tape of the present invention is preferably 10 N or less, more preferably 8 N or less, and particularly preferably 5 N or less. When the tack value exceeds 10 N, the handling property in the nonaqueous battery manufacturing process may be deteriorated.
  • the tack value is preferably as small as possible, and the lower limit is, for example, 0N.
  • the tack value is measured by a probe tack method using a tacking tester manufactured by Resta Corporation.
  • the pressure-sensitive adhesive layer includes a heat-welding pressure-sensitive adhesive.
  • the pressure-sensitive adhesive layer containing the heat-welding type pressure-sensitive adhesive does not exhibit pressure-sensitive adhesive properties at room temperature, and develops pressure-sensitive adhesive properties when heated (for example, by heating at 40 ° C. to 150 ° C.).
  • a pressure-sensitive adhesive tape having excellent handling properties in the battery manufacturing process can be obtained.
  • the said adhesive layer may contain a pressure sensitive adhesive.
  • the above heat-welding type adhesive contains any appropriate base polymer as long as the effects of the present invention can be obtained.
  • Examples of the base polymer contained in the heat-welding pressure-sensitive adhesive include thermoplastic elastomers.
  • the thermoplastic elastomer content is preferably 80 to 100 parts by weight, more preferably 90 parts by weight, with respect to 100 parts by weight of the base polymer in the heat welding adhesive. -100 parts by weight, more preferably 95-100 parts by weight. If it is such a range, it is excellent in adhesiveness and can obtain the adhesive tape excellent in adherend retainability also in electrolyte solution.
  • the softening point of the thermoplastic elastomer is preferably 100 ° C. or less, more preferably 30 ° C. to 100 ° C., further preferably 50 ° C. to 95 ° C., and particularly preferably 60 ° C. to 95 ° C. If it is such a range, the damage to the to-be-adhered body by the heating at the time of sticking can be reduced, and the adhesive tape which is excellent in workability
  • the softening point can be measured by a ring and ball measurement method, a thermomechanical analysis method (TMA), or the like.
  • thermoplastic elastomer examples include ethylene, propylene, 1-butene, 1-hexene, 3-methyl-1-butene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1
  • thermoplastic elastomer examples include, for example, a homopolymer of the monomer component; a random polymer or block polymer of two or more monomer components selected from the monomer components; a random of the monomer component and other monomer components, Block or graft polymer; and mixtures thereof.
  • the thermoplastic elastomer is a random polymer or block polymer composed of ⁇ -olefin and / or styrene.
  • thermoplastic elastomers include linear short-chain branched polyethylene (LLDPE), ethylene-propylene copolymer, propene-butene copolymer, ethylene-styrene copolymer, ethylene-butene-styrene copolymer. And an ethylene-propylene-styrene copolymer. If such a thermoplastic elastomer is used, an adhesive tape excellent in adhesiveness can be obtained.
  • thermoplastic elastomer Commercially available products may be used as the thermoplastic elastomer.
  • thermoplastic elastomers for example, trade names “Aron Melt PPET1600” manufactured by Toa Gosei Co., Ltd .; trade names “Clayton Polymer FG1924GT”, “Clayton Polymer FG1901X” manufactured by Kraton Polymer Japan; trade names manufactured by Asahi Kasei Chemicals “Tuff Tech M1913”, “Tuff Tech M1943”; trade names “Toyo Tack PMA-L” manufactured by Toyobo Co., Ltd.
  • an acid-modified thermoplastic elastomer a carbonyl-modified thermoplastic elastomer, a hydroxyl group-modified thermoplastic elastomer, an amine-modified thermoplastic elastomer, or the like is used as the thermoplastic elastomer.
  • acid-modified thermoplastic elastomers are preferably used.
  • the acid-modified thermoplastic elastomer can be obtained by graft polymerization of an unsaturated carboxylic acid and / or an acid anhydride thereof on the thermoplastic elastomer. More specifically, the acid-modified thermoplastic elastomer can be formed, for example, by bonding an unsaturated carboxylic acid as a side chain and / or an acid anhydride thereof to a thermoplastic elastomer as a main chain.
  • the graft ratio of the acid-modified thermoplastic elastomer can be appropriately adjusted by a known melt-kneading method.
  • the graft ratio of the acid-modified thermoplastic elastomer is, for example, 0.05% by weight to 10% by weight, preferably 0.1% by weight to 5% by weight with respect to the thermoplastic elastomer to be grafted. If it is such a range, the adhesive layer which has moderate adhesive force can be formed as an adhesive layer which bonds a separator and an electrode together.
  • the above heat-welding type adhesive may further contain a tackifier.
  • tackifiers include rosin derivative resins, polyterpene resins, petroleum resins, and oil-soluble phenol resins.
  • petroleum resins aromatic petroleum resins, aliphatic petroleum resins, etc.
  • a hydrogenated petroleum resin saturated aliphatic hydrocarbon resin or aromatic hydrocarbon resin is preferable because it has low reactivity with the electrolyte component and hardly causes deterioration of the electrolyte solution.
  • the softening point of the tackifier is preferably 100 ° C to 150 ° C, more preferably 110 ° C to 140 ° C, and further preferably 115 ° C to 135 ° C.
  • the content of the tackifier is preferably 5 to 50 parts by weight, more preferably 10 parts by weight with respect to 100 parts by weight of the base polymer in the heat welding adhesive.
  • Part to 30 parts by weight more preferably 15 parts to 30 parts by weight.
  • the pressure-sensitive adhesive contains any appropriate adhesive base polymer as long as the effects of the present invention can be obtained.
  • Examples of the base polymer contained in the pressure-sensitive adhesive include acrylic resins, rubber resins, and silicone resins.
  • acrylic resin examples include an acrylic resin obtained by polymerizing a monomer component containing a (meth) acrylic acid alkyl ester.
  • examples of the (meth) acrylic acid alkyl ester include n-butyl (meth) acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, and (meth) acrylic.
  • Pentyl acid isopentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, (meth) Nonyl acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, (meth) acrylic Acid tetradecyl, (meth) acrylic acid pentadecyl, (meth) acrylic Linear or branched alkyl groups having 4 to 20 carbon atoms such as hexadecyl, heptadecyl (meth) acryl
  • the content ratio of the alkyl (meth) acrylate is preferably 50 to 100 parts by weight, more preferably 70 to 100 parts by weight with respect to 100 parts by weight of the monomer component used for the polymerization of the acrylic resin. Part.
  • the acrylic resin contains structural units derived from other monomers copolymerizable with the alkyl (meth) acrylate as necessary for the purpose of modifying cohesive strength, heat resistance, crosslinkability and the like. May be.
  • examples of such other monomers include, for example, carboxyl group-containing monomers such as acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, and carboxyethyl acrylate; acid anhydrides such as maleic anhydride and itaconic anhydride Group-containing monomers; hydroxyl group-containing monomers such as 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, and hydroxybutyl (meth) acrylate; (meth) acrylamide, N, N-dimethyl (meth) acrylamide Amide monomers such as N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolprop
  • hydroxyl group- or carboxyl group-containing monomer is preferably used, and more preferably 2-hydroxyethyl (meth) acrylate, hydroxybutyl (meth) acrylate or acrylic acid (AA).
  • the content ratio of the hydroxyl group-containing monomer is preferably less than 10 parts by weight, more preferably 5 parts by weight or less, and further preferably 2 parts by weight with respect to 100 parts by weight of the monomer component used for the polymerization of the acrylic resin. Or less.
  • the content of the carboxyl group-containing monomer is preferably less than 20 parts by weight and more preferably 5 parts by weight or less with respect to 100 parts by weight of the monomer component used for the polymerization of the acrylic resin.
  • the acrylic resin preferably has a weight average molecular weight of 50,000 to 5,000,000, more preferably 100,000 to 2,000,000, and still more preferably 200,000 to 1,500,000.
  • the weight average molecular weight is less than 50,000, the pressure-sensitive adhesive component may be eluted in the non-aqueous electrolyte solution.
  • a weight average molecular weight exceeds 5 million, there exists a possibility that sufficient adhesiveness may not be expressed.
  • the weight average molecular weight is measured by GPC (gel permeation chromatography). The measurement conditions are as follows. The weight average molecular weight was calculated in terms of polystyrene.
  • Measuring device HLC-8120GPC (product name, manufactured by Tosoh Corporation) Column: TSKgel GMH-H (S) x 2 (product number, manufactured by Tosoh Corporation) Flow rate: 0.5ml / min Injection volume: 100 ⁇ l Column temperature: 40 ° C Eluent: THF Injection sample concentration: 0.1% by weight Detector: Differential refractometer
  • Natural rubber resins isoprene rubber, polyisobutylene rubber, butyl rubber, ethylene / propylene rubber, styrene / butadiene rubber, styrene / isoprene rubber, styrene / ethylene / propylene / styrene rubber, styrene / isoprene / styrene Block copolymer, styrene / butadiene / styrene block copolymer, styrene / ethylene / butylene / styrene block copolymer, styrene / ethylene / propylene / styrene block copolymer, styrene / ethylene / propylene block copolymer, recycled Examples thereof include rubber and synthetic rubber resins (including block copolymers and random copolymers) such as modified products thereof. These rubber resins may
  • silicone resin for example, silicone rubber or silicone resin mainly composed of organopolysiloxane, or a crosslinking agent such as a siloxane crosslinking agent or a peroxide crosslinking agent is added to the silicone rubber or the silicone resin. And the like.
  • an electrolytic solution for example, LiPF 6 and / or LiBF 4 as an electrolyte and cyclic carbonates such as ethylene carbonate and propylene carbonate as solvents, diethyl carbonate
  • An adhesive that can swell in an electrolytic solution containing a solvent obtained by mixing a chain carbonate such as ethyl methyl carbonate at any appropriate ratio is used. If an electrode member composed of a separator and an electrode is formed using a pressure-sensitive adhesive that can swell in the electrolyte solution, the electrode member will swell in the electrolyte solution when used in a battery. Excellent vibration control.
  • Such an effect is particularly useful in a form in which the patterned pressure-sensitive adhesive layer is transferred to the adherend, that is, in a form in which the pressure-sensitive adhesive layer is not formed on the entire surface of the adherend.
  • the adhesive that can swell in the electrolytic solution have a high affinity with non-aqueous electrolytic solutions such as acrylic adhesives, urethane adhesives, and silicone adhesives having an alkyl group having 4 or less carbon atoms in the side chain. An adhesive is mentioned.
  • the pressure-sensitive adhesive that can swell in the electrolytic solution has a degree of swelling with respect to the non-aqueous electrolytic solution of preferably 5 to 200%, more preferably 10 to 100%, and even more preferably 30 to 150%.
  • the pressure-sensitive adhesive layer may contain any appropriate additive as necessary.
  • the additive include a crosslinking agent, a tackifier, a plasticizer (for example, trimellitic acid ester plasticizer, pyromellitic acid ester plasticizer), pigment, dye, filler, anti-aging agent, conductive material. , Ultraviolet absorbers, light stabilizers, release modifiers, softeners, surfactants, flame retardants, antioxidants, solvents and the like.
  • the 1st base material may be comprised from arbitrary appropriate materials, as long as the said adhesive layer can be formed so that peeling is possible.
  • the first substrate include fiber-based substrates such as woven fabric and nonwoven fabric; paper-based substrates; plastic-based substrates such as resin films.
  • the base material may be a multilayer structure. When a base material has a form of a multilayer, each layer may be the same base material and may combine a different base material.
  • the thickness of the first base material is preferably 25 ⁇ m to 75 ⁇ m. If it is such a range, the adhesive tape excellent in workability
  • Second Base Material Any appropriate material can be used as the material constituting the second base material.
  • the second substrate include fiber-based substrates such as woven fabrics and nonwoven fabrics; paper-based substrates; plastic-based substrates such as resin films.
  • a plastic base material in that it is difficult to dissolve in the electrolytic solution and cause deterioration of the electrolytic solution, and in particular, a plastic type formed from polyimide, polyphenylene sulfide, or polyolefin (for example, polypropylene). It is preferable to use a substrate.
  • a plastic base material formed from polypropylene because it is inexpensive.
  • the second substrate may be a multilayer substrate. When a base material has a form of a multilayer, each layer may be the same base material and may combine a different base material.
  • the thickness of the second base material is, for example, 10 to 50 ⁇ m.
  • the said adhesive tape may be manufactured by arbitrary appropriate methods.
  • the pressure-sensitive adhesive tape can be obtained by applying a pressure-sensitive adhesive layer forming composition on the first substrate.
  • the adhesive tape is formed by coating the adhesive layer forming composition on both surfaces of the second substrate to form an adhesive layer, and bonding the one adhesive layer and the first substrate together. May be manufactured.
  • the composition for forming a pressure-sensitive adhesive layer contains the above pressure-sensitive adhesive and any appropriate additive.
  • the pressure-sensitive adhesive layer-forming composition is applied by a method such as screen printing, spray coating, gravure coating, flexographic coating, or die coater to form a patterned pressure-sensitive adhesive layer.
  • Example 1 4-ethylhexyl acrylate / acrylic acid (95 parts by weight / 5 parts by weight) in a four-necked flask equipped with a stirring blade, thermometer, nitrogen gas inlet tube, and condenser, and 0.2 parts by weight of benzoyl peroxide as an initiator Then, 120 parts by weight of ethyl acetate was added, nitrogen gas was introduced while gently stirring, and the polymerization temperature was kept at around 60 ° C. for about 6 hours to carry out a polymerization reaction, and an acrylic copolymer having a weight average molecular weight of 1.3 million Combined (1) was obtained.
  • a 10% pressure-sensitive adhesive (1) was prepared. Dot the pressure-sensitive adhesive composition (1) on a first base material (made by Toray Film Processing Co., Ltd., trade name “Therapy MD”, thickness: 38 ⁇ m) composed of a polyester resin. It was applied to the shape.
  • a first base material made by Toray Film Processing Co., Ltd., trade name “Therapy MD”, thickness: 38 ⁇ m
  • Example 2 An adhesive tape (2) was obtained in the same manner as in Example 1, except that the thickness of the adhesive layer was 30 ⁇ m.
  • Example 3 Hydrogenated styrene-based thermoplastic elastomer (Asahi Kasei Chemicals Co., Ltd., trade name “Tuftec M1913” weight average molecular weight: 110,000) 100 parts by weight, alicyclic saturated hydrocarbon resin (Arakawa Chemical Industries, Ltd.) , Trade name "Alcon P125”) and 30 parts by weight of toluene were added to obtain a heat-welded pressure-sensitive adhesive (1) having a solid content of 10%.
  • the said heat welding type adhesive (1) was apply
  • the coating layer is dried, and the first base material and a pressure-sensitive adhesive layer formed by patterning on the first base material in the form of dots (thickness: 1 ⁇ m, area ratio of the pressure-sensitive adhesive layer: 50%) , Dot spacing: 5 mm) was obtained.
  • Example 4 An adhesive tape (4) was obtained in the same manner as in Example 4 except that the thickness of the adhesive layer was 3 ⁇ m and the ratio of the total area of dots to the area of the first substrate was 30%.
  • Example 5 100 parts by weight of polyolefin pressure-sensitive adhesive (manufactured by Toyobo Co., Ltd., trade name “Toyotac PMA-L”, weight average molecular weight 80,000) and alicyclic saturated hydrocarbon resin (produced by Arakawa Chemical Industries, Ltd., trade name “Arcon”) P125 ”) and 30 parts by weight of toluene were added to obtain a heat-welded pressure-sensitive adhesive (2) having a solid content of 10%.
  • the said heat welding adhesive was apply
  • the coating layer is dried, and the first base material and a pressure-sensitive adhesive layer formed by patterning on the first base material in the form of dots (thickness: 1 ⁇ m, area ratio of the pressure-sensitive adhesive layer: 50%) , Dot spacing: 50 mm) was obtained.
  • Example 6 An adhesive tape (6) was obtained in the same manner as in Example 5 except that the thickness of the adhesive layer was 3 ⁇ m.
  • a polymerization reaction was carried out for 6 hours to obtain an acrylic copolymer (2) having a weight average molecular weight of 500,000.
  • 100 parts by weight of acrylic copolymer (2), 2 parts by weight of polyisocyanate compound (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.), tackifier resin Sumilite resin 12603N (manufactured by Sumitomo Bakelite Co., Ltd.) 20 Part by weight and toluene were added to obtain a heat-welding pressure-sensitive adhesive (3) having a solid content of 10%.
  • the said heat welding type adhesive (3) was apply
  • Example 8 100 parts by weight of rubber-based pressure-sensitive adhesive (BASF Japan Co., Ltd., trade name Opanol B80 weight average molecular weight 750,000) as a low molecular weight component (BASF Japan Co., Ltd. trade name Opanol B12SFN, weight average molecular weight 50,000) 30 parts by weight Toluene was added to obtain a pressure-sensitive adhesive (2) having a solid content of 10%.
  • the said adhesive (2) was apply
  • 1st base material Mitsubishi Resin Co., Ltd. make, brand name "Diafoil MRF", thickness: 38 micrometers
  • the coating layer is dried, and the first base material and the pressure-sensitive adhesive layer formed in a stripe pattern on the first base material (thickness: 25 ⁇ m, area ratio of the pressure-sensitive adhesive layer: 70) %, Stripe interval: 100 mm).
  • Rubber pressure-sensitive adhesive (trade name Opanol B50 manufactured by BASF Japan Ltd., weight average molecular weight 340,000) and 100 parts by weight of an alicyclic saturated hydrocarbon resin (trade name “Alcon P125” manufactured by Arakawa Chemical Industries, Ltd.) 30 By weight, toluene was added to obtain an adhesive (3) having a solid content of 15%.
  • the said adhesive (3) was apply
  • the coating layer is dried, and the first base material and the pressure-sensitive adhesive layer formed on the first base material in a stripe pattern (thickness: 10 ⁇ m, area ratio of the pressure-sensitive adhesive layer: 40%) , Stripe interval: 20 mm) was obtained.
  • an initiator 0.2 parts by weight of 2,2-azodiisobutyronitrile and 150 parts by weight of ethyl acetate were added, nitrogen gas was introduced while gently stirring, and the liquid temperature in the flask was kept at around 60 ° C.
  • a polymerization reaction was performed for 6 hours to obtain an acrylic copolymer (3) having a weight average molecular weight of 1.1 million.
  • an acrylic copolymer (3) having a weight average molecular weight of 1.1 million.
  • a polyisocyanate compound trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.
  • ethyl acetate are added, and a pressure-sensitive adhesive (4 )
  • the said adhesive (4) was apply
  • the coating layer is dried, and the first base material and the pressure-sensitive adhesive layer formed in a dot pattern on the first base material (thickness: 3 ⁇ m, area ratio of the pressure-sensitive adhesive layer: 10%) , Dot interval: 10 mm) was obtained.
  • a polyisocyanate compound (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) and ethyl acetate are added to form a pressure-sensitive adhesive (5 )
  • the said adhesive (4) was apply
  • the coating layer is dried, and the first base material and a pressure-sensitive adhesive layer formed by patterning on the first base material in the form of dots (thickness: 1 ⁇ m, area ratio of the pressure-sensitive adhesive layer: 50%) , Dot interval: 5 mm) was obtained.
  • Example 12 An adhesive tape (12) was obtained in the same manner as in Example 11 except that the thickness of the adhesive layer was 3 ⁇ m.
  • Ethyl acetate was added to 100 parts by weight of an acrylic pressure-sensitive adhesive (trade name Clarity LA2140, weight average molecular weight 80,000 manufactured by Kuraray Co., Ltd.) to obtain a heat-welded pressure-sensitive adhesive (4) having a solid content of 15%.
  • the heat welding type adhesive (4) was apply
  • the coating layer is dried, and the first base material and the pressure-sensitive adhesive layer formed by patterning on the first base material in a stripe shape (thickness: 5 ⁇ m, area ratio of the pressure-sensitive adhesive layer: 30%) , Stripe interval: 5 mm) was obtained.
  • Example 14 An adhesive tape (14) was obtained in the same manner as in Example 1 except that the thickness of the adhesive layer was 50 ⁇ m.
  • Example 15 An adhesive tape (15) was obtained in the same manner as in Example 1 except that the dot area ratio was 2%.
  • Tack value The 1st base material was peeled from the said test body a, and the tack value was measured by the probe tack method about the exposed adhesive layer surface. The tack value was measured under the following conditions using a tacking tester (manufactured by Resuka Co., Ltd.). ⁇ Measurement conditions> Temperature: 25 ° C Probe material: SUS Probe shape: cylindrical (5mm ⁇ ) Pressurization (compression) speed: 30 mm / min Measurement (separation) speed: 30 mm / min Preload: 100gf Pressurization (compression) time: 1 second
  • Shear adhesive strength With respect to the specimen A, a precision universal testing machine (manufactured by Shimadzu Corporation, trade name “Autograph AG-I”) was used at a temperature of 25 ° C. and a tensile speed of 300 mm / min. Shear adhesive strength (positive electrode / separator) was measured. Further, for the test specimen B, the shear adhesive strength (negative electrode / separator) was measured by the same method as described above. In Table 1, the shear adhesive strength per unit adhesive area is shown (N / cm 2 ).
  • the adhesive tape of the present invention can be suitably used as an adhesive tape for fixing a separator and an electrode in an electrode member of a secondary battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

L'invention concerne un ruban adhésif destiné à être utilisé pour fixer une électrode et un séparateur lors de la production d'une cellule secondaire, le ruban adhésif permettant de fixer le séparateur et l'électrode à un excellent degré tout en conservant la capacité d'un électrolyte à traverser le séparateur. Selon un mode de réalisation, ce ruban adhésif est muni d'un premier matériau de base et d'une couche adhésive formée de façon détachable sur le premier matériau de base, la couche adhésive étant formée par création de motifs.
PCT/JP2016/083594 2015-11-11 2016-11-11 Ruban adhésif WO2017082418A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16864379.9A EP3375834A4 (fr) 2015-11-11 2016-11-11 Ruban adhésif
CN201680065866.8A CN108350327A (zh) 2015-11-11 2016-11-11 粘合带
US15/772,174 US20180316045A1 (en) 2015-11-11 2016-11-11 Adhesive tape

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-221107 2015-11-11
JP2015221107 2015-11-11
JP2016-220382 2016-11-11
JP2016220382A JP6883973B2 (ja) 2015-11-11 2016-11-11 粘着テープ

Publications (1)

Publication Number Publication Date
WO2017082418A1 true WO2017082418A1 (fr) 2017-05-18

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PCT/JP2016/083594 WO2017082418A1 (fr) 2015-11-11 2016-11-11 Ruban adhésif

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WO (1) WO2017082418A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN107298951A (zh) * 2017-07-14 2017-10-27 东莞市古川胶带有限公司 新型超高排气型点状胶带及其制备方法
CN110911622A (zh) * 2019-10-31 2020-03-24 东莞东阳光科研发有限公司 涂覆隔膜浆料、复合隔膜及其制备方法

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JP2004342572A (ja) * 2002-11-13 2004-12-02 Nitto Denko Corp 電池用セパレータのための部分架橋接着剤担持多孔質フィルムとその利用
JP2006206657A (ja) * 2005-01-25 2006-08-10 Kokuyo S&T Co Ltd 粘着製品及び転写具
JP2010205467A (ja) * 2009-03-02 2010-09-16 Nitto Denko Corp 電池用粘着テープ、及びこの電池用粘着テープを用いた電池
JP2012529753A (ja) * 2010-10-04 2012-11-22 エルジー・ケム・リミテッド シールテープ及びこれを用いた二次電池
JP2014192079A (ja) * 2013-03-28 2014-10-06 Furukawa Battery Co Ltd:The セパレータおよび鉛蓄電池
JP2015528629A (ja) * 2013-06-28 2015-09-28 エルジー・ケム・リミテッド セパレータ切断工程を含む電極組立体の製造方法

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JP2006206657A (ja) * 2005-01-25 2006-08-10 Kokuyo S&T Co Ltd 粘着製品及び転写具
JP2010205467A (ja) * 2009-03-02 2010-09-16 Nitto Denko Corp 電池用粘着テープ、及びこの電池用粘着テープを用いた電池
JP2012529753A (ja) * 2010-10-04 2012-11-22 エルジー・ケム・リミテッド シールテープ及びこれを用いた二次電池
JP2014192079A (ja) * 2013-03-28 2014-10-06 Furukawa Battery Co Ltd:The セパレータおよび鉛蓄電池
JP2015528629A (ja) * 2013-06-28 2015-09-28 エルジー・ケム・リミテッド セパレータ切断工程を含む電極組立体の製造方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107298951A (zh) * 2017-07-14 2017-10-27 东莞市古川胶带有限公司 新型超高排气型点状胶带及其制备方法
CN110911622A (zh) * 2019-10-31 2020-03-24 东莞东阳光科研发有限公司 涂覆隔膜浆料、复合隔膜及其制备方法

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