WO2012102588A2 - 간극 충진용 스웰링 테이프 - Google Patents
간극 충진용 스웰링 테이프 Download PDFInfo
- Publication number
- WO2012102588A2 WO2012102588A2 PCT/KR2012/000675 KR2012000675W WO2012102588A2 WO 2012102588 A2 WO2012102588 A2 WO 2012102588A2 KR 2012000675 W KR2012000675 W KR 2012000675W WO 2012102588 A2 WO2012102588 A2 WO 2012102588A2
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- WIPO (PCT)
- Prior art keywords
- acrylate
- meth
- gap
- layer
- substrate
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
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- 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]
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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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
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
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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
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- C09J201/00—Adhesives based on unspecified macromolecular compounds
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- C09J7/245—Vinyl resins, e.g. polyvinyl chloride [PVC]
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- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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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
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- C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
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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
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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
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Definitions
- the present invention relates to a swelling tape for gap layering and a gap layering method.
- a gap is formed between the electrode assembly and the inner wall of the can because the electrode assembly generally has a smaller size than the cylindrical can.
- the electrode assembly accommodated in the can flows inside the can due to external vibration or shock.
- the flow of the electrode assembly causes an increase in the internal resistance of the battery or damage of the electrode wrap, thereby improving the performance of the battery. It can be greatly reduced, so it is necessary to fix the gap and the electrode assembly.
- the present invention provides a swelling tape for gap layering and a gap filling method.
- the exemplary tape may include a substrate layer and an adhesive layer formed on at least one surface of the substrate layer.
- the base layer may be, for example, a base layer having a property of deforming in the longitudinal direction when contacted with a fluid such as a liquid.
- the base layer may be, for example, a base layer having a property of expanding in the longitudinal direction when in contact with a fluid such as a liquid.
- the term "gap filling swelling tape” serves to fill the gap in a gap between two objects spaced apart from each other, and to fix the two objects as necessary. It can mean a tape.
- the swelling tape is in contact with a fluid such as a liquid, for example, in a state in which the adhesive layer is attached to one of the two objects which form the gap.
- the force generated as the base layer expands and the fixing force of the pressure-sensitive adhesive layer By the mutual balance of the may be a tape that can implement a three-dimensional shape to fill the gap.
- two objects spaced apart from each other while forming the gap may be, but are not limited to, an electrode assembly of a battery and a can housing the assembly.
- the tape is, for example, a seal tape for the electrode assembly, which can be used to prevent loosening of the electrode assembly and to fix the electrode assembly to the inside of the can of the battery.
- FIG. 1 is a diagram schematically illustrating a process in which the swelling tape fills the gap by implementing a three-dimensional shape between the gaps.
- the tape 101 includes two objects 103 forming a gap.
- One of the objects 104 is attached to the object 104 via the adhesive layer.
- the base layer expands, for example, in the longitudinal direction.
- the substrate layer is expanded in a state where the tape is fixed to the object 104 by the adhesive layer, so that the swelling tape 102 realizes a three-dimensional shape, and the gap is filled by the three-dimensional shape. If necessary, the two objects 103 and 104 forming the gap may be fixed to each other.
- the size of the three-dimensional shape implemented by the swelling tape may be, for example, about 0.001 mm to 2.0 mm, 0.001 mm to 1.0 mm or 0.01 mm to 0.5 mm.
- the size of the three-dimensional shape is not particularly limited that can be changed depending on the specific type of the gap to which the swelling tape is applied.
- the size of the three-dimensional shape according to the size of the gap to which the swelling tape is applied for example, can be controlled by adjusting the strain of the substrate layer or the peeling force of the adhesive layer as described later.
- the substrate layer included in the tape may be, for example, a substrate layer having a property of deforming in the longitudinal direction when contacted with a fluid such as a liquid.
- the base layer may be, for example, a base layer having a property of expanding in the longitudinal direction when in contact with a fluid.
- the term “length direction” can mean the direction perpendicular
- vertical or “horizontal” in the present specification means a substantially vertical or horizontal in a range that does not impair the desired effect, for example, 10 degrees, ⁇ 5 degrees, or ⁇ 3 degrees It may include a degree of error.
- the base layer has a property of deformation in the longitudinal direction, for example, expansion It is also possible to use a deformable, for example, expandable in any direction including the horizontal or vertical or diagonal direction in the plane of the substrate layer.
- the base layer may have a strain rate of 10% or more in the longitudinal direction according to the following general formula (1).
- L is the initial length before the substrate layer contacts the fluid
- L 2 is the measured temperature after contacting the substrate layer with the fluid at room temperature or 60 ° C. for 24 hours. Length of substrate.
- the specific kind of the fluid contacting the base layer is not particularly limited to being selected according to the specific state of the gap to be filled.
- the fluid when the gap to be layered is a gap formed by the electrode assembly and the can housing the electrode assembly, the fluid may be a liquid electrolyte injected into the can.
- electrolyte may mean, for example, an ion conducting medium used in a battery or the like.
- room temperature is used as it is, without being heated or sensed.
- the temperature for example, it may mean a temperature of about 10 ° C to about 30 ° C, about 20 ° C to about 30 ° C or about 25 ° C.
- the base layer may be strained in the longitudinal direction according to the size of the three-dimensional shape to be implemented, for example, 30% or more, 40% or more, 50% or more, 60% or more, 70 Or at least 80% or at least 90%.
- the upper limit of the strain rate in the longitudinal direction of the base layer is not particularly limited. That is, the larger the numerical value of the strain, the larger the size of the three-dimensional shape can be implemented, for example, the strain can be adjusted according to the size of the desired three-dimensional shape.
- the upper limit of the strain of the substrate layer may be about 500%.
- L 2 is the length of the base layer before and after contact with the fluid.
- the length is determined in a predetermined direction with respect to the base material layer, and the specific direction for measuring the length is not particularly limited as long as the direction is equally applied during the measurement of L 2 .
- the length of the base layer is the length of the horizontal, vertical, diagonal lines of the sheet, or in any direction on the plane. May be the length of the furnace.
- L 2 the same one applied to the direction of measuring the length in the measurement of L 2
- L 2 it is adopted as a width of the base layer.
- the shape of the base layer is not particularly limited, and may be, for example, a film or sheet shape.
- the film or sheet-shaped substrate layer may have a shape such as square, circle, triangle or amorphous.
- the substrate layer is a polymer film or sheet, and the film or sheet manufactured to exhibit such deformation, for example, expansion characteristics when contacted with a fluid by stretching or shrinkage treatment conditions in the manufacturing process. Can be.
- the base layer may include a base layer including a urethane bond, an ester bond, an ether bond, or a cellulose ester compound.
- an acrylate base material layer As the base material layer as described above, an acrylate base material layer, a urethane base material layer, an epoxy watch base material layer, or a cellulose base material layer may be exemplified.
- a cast layer of an active energy ray-curable composition may be used as the acrylate-based, urethane-based or epoxy-based base layer.
- the term cast layer may mean a base layer formed by coating a curable composition by a casting method and curing the coating layer.
- active energy ray-curable composition may mean a composition of the type cured by irradiation of active energy rays.
- active energy rays microwaves, infrared rays (IR), ultraviolet rays (UV), X-rays and gamma rays, as well as alpha-particle beams, proton beams, Particle beams such as neutron beams and electron beams may also be included.
- the composition may include, for example, an active energy ray curable acrylate compound and a radical polymerizable diluent.
- urethane acrylate known in the art as a so-called photocurable oligomer can be used.
- urethane acrylate for example, a semi-aquatic product of a mixture containing a polyisocyanate compound and a (meth) acrylate having a hydroxy group can be exemplified.
- the polyisocyanate compound may contain two or more isocyanate groups.
- the supporting compound for example, aliphatic, cycloaliphatic, or aromatic polyisocyanates can be exemplified, and specifically, 2, 4- can be substituted with diylene diisocyanate, 2, 6-.
- Ylene diisocyanate, 1,3-xylylene diisocyanate, 1,4-crylene diisocyanate or diphenylmethane-4,4'-diisocyanate isophorone di isocyanate and the like can be exemplified. Can be.
- (meth) acrylate which has a hydroxyl group in the above, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6— Hydroxyalkyl (meth) acrylates such as hydroxynucleosil (meth) acrylate or 8-hydroxyoctyl (meth) acrylate and the like can be exemplified, but is not limited thereto.
- urethane acrylate for example, a semi-curable including a urethane prepolymer having an isocyanate group and a (meth) acrylate having a hydroxy group is used at the terminal, which is a reaction product of a mixture containing an ester poly and a polyisocyanate.
- ester polyols include, for example, poly and / or ether polyols; And esterification reaction products with acid components such as dibasic acids or anhydrides thereof.
- polyol examples include ethylene glycol, propylene glycol, cyclonucleic acid dimethanol, 3-methyl-1,5-pentanedi, and the like, and as the ether polyol, polyethylene glycol, polypropylene glycol or polytetramethylene Blocks such as polyalkylene glycols such as glycol or polyethylene polypropoxy block polymer diols or diols of random polymers can be exemplified, and examples of the acid component include adipic acid, succinic acid and phthalic acid.
- phthalic acid tetrahydrophthalic acid
- dibasic acid such as nucleated hydrophthalic acid and terephthalic acid, or anhydrides thereof, and the like
- anhydrides thereof and the like
- the (meth) acrylate having a polyisocyanate and a hydroxyl group the above-mentioned compounds may be used.
- urethane acrylate it is also possible to use a reaction product of the mixture containing a urethane prepolymer having an isocyanate group and a (meth) acrylate having a hydroxy group as a reaction product of a mixture containing an ether poly and a polyisocyanate. .
- epoxy acrylate epoxy acrylate, epoxy acrylate, polyester acrylate or polyether acrylate can also be used.
- polyester acrylate in the above for example, ester poly and (The dehydration condensation reaction product of the complex containing a meta) acrylic acid can be used.
- ester polyol for example, a compound as described above may be used.
- polyalkylene glycol di such as polyethyleneglycol di (meth) acrylate, polypropylene glycol di (meth) acrylate or polytetramethylene glycol di (meth) acrylate) Meta
- epoxy acrylate examples include an addition reaction product of a mixture containing an epoxy resin and (meth) acrylic acid.
- the kind of epoxy resin is not specifically limited, The general aromatic or aliphatic epoxy resin known in this field can be used.
- radical polymerizable diluent included in the composition for example, a monomer having a functional group capable of participating in radical polymerization by irradiation of active energy rays can be used.
- a (meth) acrylic acid ester monomer As such a monomer, As a (meth) acrylic acid ester monomer, it is an alkyl (meth) arcrelate; (Meth) acrylate which has an alkoxy group, (meth) acrylate which has an alicyclic group; (Meth) acrylate which has an aromatic group; (Meth) acrylates having heterocycles; And one or more selected from the group consisting of multifunctional acrylates.
- alkyl (meth) acrylate methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl ( Metha) acrylate, t-butyl (meth) acrylate, sec-butyl (meth) acrylate, pentyl (meth) acrylate, 2-ethylnuclear (meth) acrylate, 2-ethylbutyl (meth) acrylic Alkyl groups having 1 to 20 carbon atoms such as n-octyl (meth) acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylate, lauryl (meth) acrylate and tetradecyl (meth) acrylate Alkyl (meth) acrylate which has the following can be illustrated, As a (meth) acrylate
- (meth) acrylate which has an alicyclic group isobornyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentenyloxy (meth) acrylate, etc. can be illustrated.
- (meth) acrylate having an aromatic group phenylhydroxypropyl (meth) acrylate or benzyl (meth) acrylate may be exemplified, and as the (meth) acrylate having a hetero ring, Hydrofurfuryl (meth) acrylate or morpholinyl (meth) acrylate, etc. can be illustrated,
- a polyfunctional acrylate As a polyfunctional acrylate,
- a monomer having a polar functional group specifically, a hydroxy group, a carboxyl group, a nitrogen-containing group or a glycidyl group
- examples of the monomer having a hydroxy group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxynuclear chamber.
- the acrylic composition may include, for example, 30 parts by weight to 99 parts by weight of the active energy ray-curable acrylate compound and 1 part by weight to 70 parts by weight of the radical polymerizable diluent.
- the weight ratio and the type of the acrylate compound and the radically polymerizable diluent can be changed, for example, in consideration of the desired strain rate.
- the unit "parts by weight” means a weight ratio
- the acrylic composition may further include a photoinitiator.
- the photoinitiator may induce polymerization reaction of the acrylic composition by irradiation of active energy rays.
- photoinitiator for example, a known photoinitiator such as benzoin, hydroxyketone, amino ketone, peroxide or phosphine oxide can be used.
- the acrylic composition may include a photoinitiator in an amount of 0.01 to 10 parts by weight or 0.1 to 5 parts by weight based on 100 parts by weight of the total weight of the acrylate compound and the calcining agent.
- the composition may include one or more additives selected from the group consisting of dyes and pigments, epoxy resins, crosslinking agents, UV stabilizers, antioxidants, colorants, reinforcing agents, layering agents, antifoaming agents, surfactants, optical thickeners and plasticizers as necessary. May be additionally included.
- the cast layer may be prepared by coating the composition to an appropriate thickness in a casting method and then irradiating an active energy ray to cure it by polymerization.
- the specific method of casting the composition is not particularly limited, for example, in consideration of the desired thickness, bar coat, knife coat, coat, spray coat, This can be done in a gravure coat, curtain coat, comma coat or lip coat.
- irradiation of an active energy ray is performed using, for example, a metal halide lamp, a high pressure mercury lamp, a black light lamp, an electrodeless lamp, or a xenon lamp. can do.
- the irradiation conditions of the active energy ray for example, the wavelength and the amount of light are not particularly limited and can be selected in consideration of the composition of the composition and the like.
- urethane base layer for example, a base layer containing a urethane resin such as TPlKThermoplastic polyurethane) or a cast layer of a curable urethane composition can be used.
- a urethane resin such as TPlKThermoplastic polyurethane
- a cast layer of a curable urethane composition can be used.
- a composition containing a polyol and an isocyanate compound can be used as a composition of the type to be cured by application of heat.
- polyalkyl may be alkylene glycol, dialkylene glycol or benzenedi.
- benzenetriol (ex. 1,2, 3-benzenetriol), dialluimine, trialcoholamine, arabi ( arabitol, mannitol, isomalt, glycerol, xylitol, sorbitol, maltitol, erythritol, ribitol ), Dulcitol, lactyl (lactitol), trays (threitol), idi (iditol) or polyglycyl (polyglycitol).
- isocyanate compound for example, the polyisocyanate described in the urethane acrylate section may be used.
- alkylene included in the alkylene glycol or dialkylene glycol examples include alkylene having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms.
- the curable urethane composition may include, for example, each component such that the equivalent ratio of the hydroxyl group (0H) of the poly to the isocyanate group (NC0) of the polyisocyanate is substantially about 1: 1.
- the equivalent ratio may be changed in consideration of, for example, the strain rate desired.
- the cast layer can be prepared, for example, by casting the urethane composition in a similar manner as in the case of the acrylic composition and curing by applying appropriate heat to the cast coating layer.
- a base layer comprising a cellulose acetate resin or a cellulose alkylate resin
- a base layer prepared by applying a mixture containing the resin to an extrusion or casting process may be used.
- the cellulose alkylate in the above for example, sal cellulose acetate propionate (cellulose acetate propionate) or cellulose acetate butylate (cellulose acetate butyl ate) can be used.
- the method of preparing the base layer using the resin is not particularly limited, and for example, a conventional film or sheet molding method such as extrusion or casting of a raw material containing the resin and a known additive as necessary.
- a method of applying an appropriate treatment in the molding process may be used so that the base layer exhibits the above-described deformation, for example, expansion characteristics.
- the thickness of the base layer is not particularly limited.
- the ability to implement the desired three-dimensional shape, the size of the gap to be layered, etc. are taken into consideration. Can be selected.
- the tape may include an adhesive layer formed on at least one surface of the substrate layer.
- the adhesive layer may be formed on one surface of the substrate layer in a direction parallel to the length direction of the substrate layer described above.
- 2 is a cross-sectional view of the exemplary tape and shows a tape 2 including an adhesive layer 202 formed on one surface of the substrate layer 201 in a direction parallel to the longitudinal direction of the substrate layer 201.
- the tape may be expanded in contact with the fluid by the tape in a state where the tape is fixed by an adhesive layer formed in a direction parallel to the longitudinal direction of the substrate layer as described above. It is possible to implement a three-dimensional shape projecting in the direction perpendicular to the.
- the adhesive layer may be designed to have an appropriate peel force. For example, if the peel force is insufficient in the range for realizing the desired three-dimensional shape, the adhesive layer does not adequately support the deformation caused by the deformation of the substrate layer, for example, the expansion, and thus the tape is peeled off or the three-dimensional shape is realized. This may be difficult, if the peeling force exceeds the range of the adhesive layer to suppress the deformation of the substrate layer too much may also be difficult to implement a three-dimensional shape.
- the peeling force may be, for example, 100 gf / 25 mm or more, 150 gf / 25 mm or more, 200 gf / 25 mm or more, 300 gf / 25 mm or more, 400 gf / 25 mm or more, 500 gf / 25 mm or more, 600 gf / 25 ⁇ or more , 700 gf / 25 ⁇ or more , 800 gf / 25 ⁇ or more , 900 gf / 25 ⁇ or more , 1,000 gf / 25 ⁇ or more , 1,100 gf / 25 ⁇ or more , 1, 200 gf / 25 mm or more , 1,300 gf / 25mm or more , 1,400 gf / 25 ⁇ or more , 1,500 gf / 25 ⁇ or more , 1,600 gf / 25 ⁇ or more It may be 1,700 gf / 25mm or more or 1,800 gf / 25mm or
- the peeling force is not particularly limited to, for example, can be changed depending on the size of the three-dimensional shape to be implemented or the gap to be layered.
- the peeling force may be, for example, a peeling force on any one of the objects forming the gap to be layered or a peeling force on the glass plate.
- the peel force is a peel force measured at room temperature, may be a peel force measured at a peel rate of 5 kW / sec and a peel angle of 180 degrees.
- the peel force of the pressure-sensitive adhesive layer can be adjusted in consideration of the ability to implement the desired three-dimensional shape, and the upper limit is not particularly limited.
- an acrylic adhesive, a urethane adhesive, an epoxy adhesive, a silicone adhesive, or a rubber-based adhesive may be used as the adhesive layer.
- the adhesive layer is an acrylic adhesive layer and may include, for example, an acrylic polymer crosslinked by a multifunctional crosslinking agent.
- acrylic polymer for example, a weight average molecular weight (M w : Weight Average
- Molecular weight of 400,000 or more can be used.
- the said weight average molecular weight is a conversion value with respect to standard polystyrene measured by GPC (Gel Permeation Chromatograph).
- GPC Gel Permeation Chromatograph
- the term "molecular weight” means a weight average molecular weight.
- the upper limit of the molecular weight of the acrylic polymer is not particularly limited and may be controlled, for example, in the range of 2.5 million or less.
- the acrylic polymer may include, for example, a (meth) acrylic acid ester monomer and a copolymerizable monomer having a crosslinkable functional group in a polymerized form.
- the weight ratio of each monomer is not particularly limited, and for example, may be designed in consideration of the desired peel force.
- alkyl (meth) acrylate As the (meth) acrylic acid ester monomer contained in the polymer, for example, alkyl (meth) acrylate can be used, and in view of the cohesion force of the pressure-sensitive adhesive, glass transition temperature, or adhesiveness, Alkyl (meth) acrylates having an alkyl group of 1 to 14 can be used.
- One or two or more kinds of nonyl (meth) acrylate, lauryl (meth) acrylate and tetradecyl (meth) acrylate may be exemplified, but are not limited thereto.
- the copolymerizable monomer having a crosslinkable functional group may be copolymerized with the (meth) acrylic acid ester monomer or other monomer included in the polymer, and may provide a crosslinking point capable of reacting with the multifunctional crosslinking agent in the main chain of the polymer after copolymerization. It is a monomer.
- the crosslinkable functional group may be a hydroxyl group, a carboxyl group, an isocyanate group, a glycidyl group, an amide group, or the like, and in some cases, may be a photocrosslinkable functional group such as an acryloyl group or a methacryloyl group.
- the compound which has a photocrosslinkable functional group can be introduce
- Various copolymerizable monomers which can be used depending on the desired functional group are known in the manufacturing field of an adhesive.
- Examples of such monomers include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxynuclear (meth) acrylate, Monomers having a hydroxy group such as 8—hydroxyoctyl (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate or 2-hydroxypropylene glycol (meth) acrylate; (Meth) acrylic acid 2- (meth) acryloyloxy acetic acid, 3 '(meth) acryloyloxy propyl acid, 4- (meth) acryloyloxy butyric acid, acrylic acid duplex, itaconic acid, maleic acid and male Monomers having a carboxyl group such as acid anhydride and the like; Glycidyl (meth) acrylate, (meth) acrylamide, N-vinyl pyridone or N-vinyl caprolactam, and the like, but are not
- the acrylic polymer may further include other functional comonomers in a polymerized form, and examples thereof include monomers represented by the following Chemical Formula 1.
- ⁇ to 3 ⁇ 4 each independently represent hydrogen or alkyl, Is cyano; Phenyl unsubstituted or substituted with alkyl; Acetyloxy; Or co3 ⁇ 4 wherein 3 ⁇ 4 represents amino or glycidyloxy unsubstituted or substituted with alkyl or alkoxyalkyl.
- Alkyl or alkoxy in the definition of R 5 in the above formula means alkyl or alkoxy having 1 to 8 carbon atoms, preferably methyl, ethyl, methoxy, ethoxy, propoxy or butoxy.
- the monomer of Chemical Formula 1 include (meth) acrylonitrile, N-methyl (meth) acrylamide, N-subspecific methyl (meth) acrylamide, styrene, methyl styrene, or vinyl acetate. Vinyl esters of carboxylic acids, and the like, but are not limited thereto.
- the acrylic polymer is prepared by, for example, solution polymerization, photo polymerization, bulk polymerization, suspension polymerization, or emulsion polymerization. can do.
- the type of the multifunctional crosslinking agent that crosslinks the acrylic polymer in the adhesive layer is not particularly limited, and is, for example, in a known crosslinking agent such as an isocyanate crosslinking agent, an epoxy crosslinking agent, an aziridine crosslinking agent, a metal chelate crosslinking agent, or a photocrosslinking agent.
- An appropriate crosslinking agent may be selected according to the kind of crosslinkable functional groups present in the polymer.
- isocyanate crosslinking agent examples include diisocyanates such as ylene diisocyanate, xylene diisocyanate, diphenylmethane diisocyanate, nuclemethylene diisocyanate, isoborone diisocyanate, tetramethylxylene diisocyanate or naphthalene diiso cyanate, And a semi-ungmul product of the diisocyanate and a polyol, and the like, and polymethyl may be used as propane.
- diisocyanates such as ylene diisocyanate, xylene diisocyanate, diphenylmethane diisocyanate, nuclemethylene diisocyanate, isoborone diisocyanate, tetramethylxylene diisocyanate or naphthalene diiso cyanate,
- a semi-ungmul product of the diisocyanate and a polyol, and the like, and polymethyl may be used as propane
- Epoxy crosslinkers include ethylene glycol diglycidyl ether, triglycidyl ether, trimethyl to propane triglycidyl ether, ⁇ , ⁇ , ⁇ ', ⁇ '-tetraglycidyl ethylenediamine or glycerin diglycidyl ether.
- aziridine crosslinking agent ⁇ , ⁇ '- toluene-2, 4-bis (1-aziridinecarboxamide), ⁇ , ⁇ '-diphenylmethane-4, 4'-bis ( 1-aziridine carboxamide), triethylene melamine, bisisoprotaloyl-1- (2-methylaziridine) or tri-1-aziridinylphosphine oxide, and the like.
- a compound in which a polyvalent metal is coordinated with a compound such as acetyl acetone or ethyl acetoacetate.
- polyvalent metal examples include aluminum, iron, zinc, tin, titanium, and anti Mon, magnesium, vanadium, and the like, and as the photocrosslinking agent, polyfunctional acrylate may be used.
- photocrosslinking agent examples include aluminum, iron, zinc, tin, titanium, and anti Mon, magnesium, vanadium, and the like, and as the photocrosslinking agent, polyfunctional acrylate may be used.
- crosslinkable functional groups contained in the polymer one or two or more crosslinking agents may be used.
- the weight ratio of the multifunctional crosslinking agent in the pressure-sensitive adhesive layer can be adjusted, for example, in consideration of the desired peel force.
- the adhesive layer may be formed, for example, by coating a coating solution containing the acrylic polymer and the multifunctional crosslinking agent as described above, and inducing crosslinking reaction of the polymer and the multifunctional crosslinker under appropriate conditions. have.
- the adhesive layer is composed of a coupling agent, a tackifier, an epoxy resin, an ultraviolet stabilizer, an antioxidant, a colorant, a reinforcing agent, a layered system, an antifoaming agent, a surfactant, and a plasticizer within a range that does not affect the desired effect.
- One or more additives selected from the group may further be included.
- the thickness of the pressure-sensitive adhesive layer may be appropriately selected depending on the application to be applied, for example, a desired peel force, three-dimensional shape ability, or a size of a gap to be layered, and the like. .
- the tape may further include a release sheet attached to the adhesive layer to protect the adhesive layer before use of the tape.
- the present invention also relates to a method for filling gaps.
- One exemplary method may be a method of filling gaps formed by a first substrate and a second substrate spaced apart from the first substrate.
- the method includes, for example, attaching the adhesive layer of the swelling tape to the first substrate or the second substrate, and deforming the substrate layer in the longitudinal direction by bringing the substrate layer of the swelling tape into contact with a fluid. For example, it may include expanding.
- the specific types and shapes of the first substrate and the second substrate forming the gap are not particularly limited. That is, the gap between the first substrate and the second substrate forms a gap that requires layering, and may include all kinds of substrates through which fluid can be introduced into the gap.
- the shape of the substrate is not particularly limited, and for example, as shown in FIG. 1, not only a flat shape but also a curved or irregular shaped substrate may be included.
- the width of the gap formed by the first substrate and the second substrate may be about 0.0 mm to 2.0 mm, about 0.001 mm to 1.00 mm, or about 0.01 mm to 0.5 mm, but is not limited thereto.
- the method forms a gap .
- one of the first and second substrates used in the method is a battery electrode assembly, the other is a can containing the assembly, and the fluid in contact with the tape is contained in the battery. It may be an electrolyte.
- the method may be performed by attaching the tape to an electrode assembly and then storing the inside of the can and injecting an electrolyte into the can.
- the electrode assembly may be an electrode assembly for a secondary battery, for example, a lithium secondary battery.
- the electrode assembly may include a positive electrode plate; And a separator interposed between the negative electrode plate and the positive electrode plate and the negative electrode plate, wherein the swelling tape may be attached to the outer circumferential surface of the electrode assembly via the adhesive layer.
- the electrode assembly may be wound in a jelly shape.
- the positive electrode plate may include a positive electrode current collector made of a metal thin plate having excellent conductivity; And a cathode active material layer coated on the surface of the cathode current collector.
- both ends of the positive electrode plate are formed with a region which is not coated with the positive electrode active material, and the positive electrode wrap protruding to a predetermined length to the upper or lower portion of the electrode assembly may be attached.
- the positive electrode wrap may serve to electrically connect the electrode assembly and another portion of the battery.
- the negative electrode plate, the negative electrode current collector made of a conductive metal thin plate or the like; And a negative electrode active material layer coated on a surface of the negative electrode current collector.
- both ends of the negative electrode plate are formed with regions in which the negative electrode active material layer is not coated, and the regions protrude to a predetermined length to the upper or lower portion of the electrode assembly, and the other of the electrode assembly and the battery.
- the negative electrode tab may be attached to electrically connect the parts.
- the electrode assembly is to prevent contact with the cap assembly or the cylindrical can, and may further include an insulating plate formed on the upper and / or lower.
- the swelling tape may be attached to surround the outer circumferential surface, including a finish portion at which an outermost side end of the separator of the outer circumferential surface of the electrode assembly is positioned.
- the swelling tape may be attached to cover at least 30% or more of the total area of the outer circumferential surface of the electrode assembly, and the upper and lower parts of the outer circumferential surface of the electrode assembly may be attached to expose the assembly as it is.
- the kind of the can in which the electrode assembly is accommodated is not particularly limited.
- a cylindrical can or the like can be exemplified as a type known in the art.
- the type of electrolyte which is a fluid that deforms the tape, for example, inflate the tape
- the electrolyte may include, for example, a non-aqueous organic solvent and a lithium salt.
- the lithium salt is dissolved in an organic solvent, and serves as a source of lithium ions in the battery, and may promote the movement of lithium ions between the positive electrode and the negative electrode.
- Examples of lithium salts are LiPF 6 , LiBF 4)
- concentration of lithium salt in the electrolyte which may vary depending on the application, is typically used within the range of 0.1M to 2.0M.
- the organic solvent serves as a medium through which the ions involved in the electrochemical reaction of the battery can move, for example, benzene, toluene, fluorobenzene, 1,2-difluorobenzene, 1 , 3-difluorobenzene 1,4-difluorobenzene , 1,2,3-trifluorobenzene , 1 ⁇ 2,4-trifluorobenzene, chlorobenzene , 1,2-dichlorobenzene, 1 , 3-dichlorobenzene, 1,4-dichlorobenzene, 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene, iodobenzene, 1,2-diiobenzene, 3-diiobenzene, 1,4-diiobenzene, 1,2,3-triiodobenzene, 1,2,4-triiobenzene, fluoroluene, 1,2-dipolluoro Ro
- a pressure-sensitive adhesive layer having a predetermined peeling force is formed on the base layer having the above-described deformation, for example, expansion characteristics. Accordingly, after the tape is applied to the method, for example, the tape can be implemented in the state attached to the electrode assembly. As a result, the tape can effectively layer the gap between the electrode assembly and the inner wall of the can, and fix the electrode assembly to prevent flow or shaking.
- the "stereoscopic shape" of the swelling tape in the above is formed through the action of the deformation force of the base layer of the swelling tape in contact with the electrolyte and the peeling force of the adhesive layer, and firmly the electrode assembly inside the can. It can be a concept that includes any structure that can be fixed.
- FIG. 3 shows an exemplary cell produced by the above method, in which the swelling tapes 51a and 51b form a three-dimensional shape by an electrolyte to fix the electrode assembly 53 to the can 52. Show the status
- the swelling tape 51a is kept flat in the step of being inserted into the can 52 after being attached to the assembly 53. There may be. However, after a predetermined time has elapsed after contact with the electrolyte injected into the can 52, the swelling tape 53b forms a three-dimensional shape, as exemplarily shown in the right drawing of FIG. Accordingly, the gap between the electrode assembly 53 and the can 52 can be filled and fixed.
- the swelling tape may be applied between, for example, gaps in which a fluid is present, to layer the gaps by implementing a three-dimensional shape, and to be used for fixing an object forming the gaps as necessary. Can be. [Brief Description of Drawings]
- 1 is a diagram illustrating a process of forming a three-dimensional shape of the swelling tape.
- FIG. 2 is an exemplary cross-sectional view of the swelling tape.
- FIG. 3 is a diagram exemplarily illustrating a process of forming a three-dimensional shape of the swelling tape in a battery manufacturing process.
- the substrate layer is cut to have a length of 10 mm and a length of 50 mm to prepare a specimen.
- the prepared specimen was impregnated in a carbonate-based electrolyte, left in a sealed state for 1 day, and then removed from the electrolyte, and the longitudinal length of the specimen was measured. Measure it.
- the initial length in the longitudinal direction of the substrate layer before impregnation with the electrolyte that is, 50 mm
- L 2 is the length in the longitudinal direction of the substrate layer measured after impregnation with the electrolyte.
- a swelling tape is cut to have a length of 25 mm and a length of 200 mm to prepare a specimen.
- the specimen is attached to the glass plate using an adhesive layer using a 2 kg rubber roller and stored at room temperature for 2 hours. Then, peeling force is measured, using a tensile tester, peeling a swelling tape at a peeling speed of 5 kPa / sec and a peeling angle of 180 degrees.
- the gap layering capability of the swelling tape can be evaluated by a method of evaluating the flow preventing property of the electrode assembly.
- a method of evaluating the flow preventing property of the electrode assembly For example, there are residual vibration evaluation methods and residual stratification evaluation methods.
- vibration is conducted according to the UN38.3 standard vibration test method. If the battery becomes insensitive after the evaluation, it is determined that the terminal is cut by flow.
- the residual layer evaluation method the battery is placed in an octagonal cylinder or the like, rotated, and after a predetermined time, when the battery becomes insensitive, it is determined that the terminal is cut by flow.
- the gap layer fidelity of the swelling tape evaluated according to the above method was evaluated according to the following criteria.
- ⁇ The power of the battery is measured after the residual vibration evaluation or the residual stratification evaluation, but the resistance increases by 10% or more.
- a composition comprising butanediol poly and methylene diphenyl diisocyanate such that the equivalent ratio of the hydroxyl group of the polyl to the isocyanate group of the diisocyanate is about 1: 1, with a thickness of about T-die.
- Substrate was prepared by curing after forming a dodo tok film of 40 j. The strain in the longitudinal direction of the prepared substrate was about 10.
- the prepared composition was coated on a polyester mold release film using a bar coater to have a thickness of about 40. In order to prevent contact with oxygen, cover the polyester release film on the coating layer, and then irradiate the UV-A region with light of 800 mJ / cm 2 using a metal halide lamp to cure the composition and prepare a base layer. It was. The deformation in the longitudinal direction of the prepared substrate layer was about 43%.
- the prepared composition was coated on a polyester release film using a bar coater to have a thickness of about 40.
- a substrate was prepared by coating a polyester release film on the coating layer and irradiating the UV-A region with light of 800 mJ / cm 2 using a metal halide lamp.
- the longitudinal strain of the prepared substrate layer was about 11%.
- a raw material containing a cel lulose acetate propionate compound having a number average molecular weight (Mn) of 70, 000 as measured by GPC was about 40 [M] in thickness with a T-die. It formed into the base material layer which is the grade. The strain in the longitudinal direction of the prepared substrate layer was about 20%.
- a swelling tape was prepared by forming an adhesive layer having a peeling force of 1,900 gf / 25mm and a thickness of 15 / zm.
- the base layer was changed as shown in Table 1 below, and an adhesive layer based on the same composition as in Example 1 was used, and the peeling force of the adhesive layer on glass was A swelling tape and a battery were prepared in the same manner as in Example 1 except that the present invention was changed to appear as shown.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Secondary Cells (AREA)
- Laminated Bodies (AREA)
- Cell Separators (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Sealing Material Composition (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013551911A JP6152986B2 (ja) | 2011-01-27 | 2012-01-27 | 間隙充填用スウェリングテープ |
CN201280016022.6A CN103459530B (zh) | 2011-01-27 | 2012-01-27 | 填充间隙用溶胀胶带 |
EP12738841.1A EP2657310B1 (en) | 2011-01-27 | 2012-01-27 | Swelling tape for filling gap |
US13/946,667 US9475961B2 (en) | 2011-01-27 | 2013-07-19 | Swelling tape for filling gap |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20110008160 | 2011-01-27 | ||
KR10-2011-0008160 | 2011-01-27 | ||
KR1020120008565A KR101375888B1 (ko) | 2011-01-27 | 2012-01-27 | 간극 충전용 스웰링 테이프 |
KR10-2012-0008565 | 2012-01-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/946,667 Continuation US9475961B2 (en) | 2011-01-27 | 2013-07-19 | Swelling tape for filling gap |
Publications (2)
Publication Number | Publication Date |
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WO2012102588A2 true WO2012102588A2 (ko) | 2012-08-02 |
WO2012102588A3 WO2012102588A3 (ko) | 2012-12-20 |
Family
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PCT/KR2012/000673 WO2012102586A2 (ko) | 2011-01-27 | 2012-01-27 | 테이프 |
PCT/KR2012/000672 WO2012102585A2 (ko) | 2011-01-27 | 2012-01-27 | 전극 조립체 |
PCT/KR2012/000675 WO2012102588A2 (ko) | 2011-01-27 | 2012-01-27 | 간극 충진용 스웰링 테이프 |
PCT/KR2012/000674 WO2012102587A2 (ko) | 2011-01-27 | 2012-01-27 | 간극 충진용 스웰링 테이프 |
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PCT/KR2012/000673 WO2012102586A2 (ko) | 2011-01-27 | 2012-01-27 | 테이프 |
PCT/KR2012/000672 WO2012102585A2 (ko) | 2011-01-27 | 2012-01-27 | 전극 조립체 |
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PCT/KR2012/000674 WO2012102587A2 (ko) | 2011-01-27 | 2012-01-27 | 간극 충진용 스웰링 테이프 |
Country Status (11)
Country | Link |
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US (5) | US9222003B2 (ko) |
EP (4) | EP2657310B1 (ko) |
JP (5) | JP6152986B2 (ko) |
KR (7) | KR101375888B1 (ko) |
CN (5) | CN103339781B (ko) |
ES (2) | ES2931901T3 (ko) |
HK (2) | HK1185453A1 (ko) |
HU (2) | HUE060339T2 (ko) |
PL (2) | PL2658025T3 (ko) |
TW (4) | TWI449240B (ko) |
WO (4) | WO2012102586A2 (ko) |
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2012
- 2012-01-27 KR KR1020120008565A patent/KR101375888B1/ko active IP Right Grant
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Cited By (3)
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JP2014508827A (ja) * | 2011-01-27 | 2014-04-10 | エルジー・ケム・リミテッド | 間隙充填用スウェリングテープ |
JP2016500729A (ja) * | 2012-11-16 | 2016-01-14 | エルジー・ケム・リミテッド | 間隙充填用スウェリングテープ |
US10115951B2 (en) | 2012-11-16 | 2018-10-30 | Lg Chem, Ltd. | Swelling tape for filling gap |
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