JPWO2017131155A1 - 包装材料及び電池 - Google Patents
包装材料及び電池 Download PDFInfo
- Publication number
- JPWO2017131155A1 JPWO2017131155A1 JP2017563849A JP2017563849A JPWO2017131155A1 JP WO2017131155 A1 JPWO2017131155 A1 JP WO2017131155A1 JP 2017563849 A JP2017563849 A JP 2017563849A JP 2017563849 A JP2017563849 A JP 2017563849A JP WO2017131155 A1 JPWO2017131155 A1 JP WO2017131155A1
- Authority
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- Japan
- Prior art keywords
- layer
- packaging material
- laminate
- base material
- acid
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- WOQDVIVTFCTQCE-UHFFFAOYSA-N pentacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O WOQDVIVTFCTQCE-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920006111 poly(hexamethylene terephthalamide) Polymers 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920006146 polyetheresteramide block copolymer Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920000921 polyethylene adipate Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 235000011008 sodium phosphates Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000009823 thermal lamination Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- JUWGUJSXVOBPHP-UHFFFAOYSA-B titanium(4+);tetraphosphate Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O JUWGUJSXVOBPHP-UHFFFAOYSA-B 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- FTBATIJJKIIOTP-UHFFFAOYSA-K trifluorochromium Chemical compound F[Cr](F)F FTBATIJJKIIOTP-UHFFFAOYSA-K 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- GPTWCNIDKQZDFF-UHFFFAOYSA-H trizinc;diphosphate;hydrate Chemical compound O.[Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GPTWCNIDKQZDFF-UHFFFAOYSA-H 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical compound [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 description 1
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 description 1
Images
Classifications
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/141—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against humidity
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
(試験条件)
試験速度:50mm/min
試験片の幅:15mm
試験片の長さ:100mm
標点間距離:30mm
項1. 少なくとも、基材層、バリア層、及び熱融着性樹脂層をこの順に備える積層体から構成されており、
前記積層体は、下記試験条件にて引張試験を行った際に計測される、試験力−変位量の曲線から算出される単位幅1m当りの破断エネルギーが、前記積層体の厚み方向とは垂直方向の一方向と、前記一方向及び前記積層体の厚み方向とは垂直方向である他方向の合計で400J以上である、包装材料。
(試験条件)
試験速度:50mm/min
試験片の幅:15mm
試験片の長さ:100mm
標点間距離:30mm
項2. 前記一方向が前記積層体のMDであり、前記他方向が前記積層体のTDである、項1に記載の包装材料。
項3. 前記積層体は、JIS Z1707:1995の規定に準拠した方法により、前記基材層側から測定される突刺し強さが、23N以上である、項1または2に記載の包装材料。
項4. 前記積層体は、JIS K7124−2:1999の規定に準拠し、下記の測定条件で、前記基材層側から測定される全貫通エネルギーが、1.4J以上である、項1〜3のいずれかに記載の包装材料。
(測定条件)
ハンマー重量:6.4kg
落下高さ:300mm
サンプルクランプ径:40mmφ
ハンマー径:12.7mm
ハンマーの形状:半球状
項5. 前記基材層の厚みが、20μm以上である、項1〜4のいずれかに記載の包装材料。
項6. 前記バリア層が、アルミニウム箔により構成されている、項1〜5のいずれかに記載の包装材料。
項7. 電池素子を収容するために用いられる、項1〜6のいずれかに記載の包装材料。
項8. 少なくとも正極、負極、及び電解質を備えた電池素子が、項1〜7のいずれかに記載の包装材料により形成された包装体中に収容されている、電池。
(試験条件)
試験速度:50mm/min
試験片の幅:15mm
試験片の長さ:100mm
標点間距離:30mm
本発明の包装材料は、例えば図1に示すように、少なくとも、基材層1、バリア層3、及び熱融着性樹脂層4が順次積層された積層体から構成される。本発明の包装材料において、基材層1が最外層側になり、熱融着性樹脂層4は最内層になる。即ち、電池の組み立て時に、電池素子の周縁に位置する熱融着性樹脂層4同士が熱融着して電池素子を密封することにより、電池素子が封止される。
ハンマー重量:6.4kg
落下高さ:300mm
サンプルクランプ径:40mmφ
ハンマー径:12.7mm
ハンマーの形状:半球状
[基材層1]
本発明の包装材料において、基材層1は、最外層側に位置する層である。基材層1を形成する素材については、絶縁性を備えるものであることを限度として特に制限されるものではない。基材層1を形成する素材としては、例えば、ポリエステル、ポリアミド、エポキシ樹脂、アクリル樹脂、フッ素樹脂、ポリウレタン、珪素樹脂、フェノール樹脂、ポリエーテルイミド、ポリイミド、及びこれらの混合物や共重合物等が挙げられる。
本発明の包装材料において、接着剤層2は、基材層1とバリア層3を強固に接着させるために、これらの間に設けられる層である。
包装材料において、バリア層3は、包装材料の強度向上の他、電池内部に水蒸気、酸素、光などが侵入することを防止する機能を有する層である。バリア層3を構成する金属としては、具体的には、アルミニウム、ステンレス、チタンなどが挙げられ、好ましくはアルミニウムが挙げられる。バリア層3は、例えば、金属箔や金属蒸着膜、無機酸化物蒸着膜、炭素含有無機酸化物蒸着膜、これらの蒸着膜を設けたフィルムなどにより形成することができ、金属箔により形成することが好ましく、アルミニウム合金箔により形成することがさらに好ましい。電池用包装材料の製造時に、バリア層3にしわやピンホールが発生することを防止する観点からは、バリア層は、例えば、焼きなまし処理済みのアルミニウム(JIS H4160:1994 A8021H−O、JIS H4160:1994 A8079H−O、JIS H4000:2014 A8021P−O、JIS H4000:2014 A8079P−O)など軟質アルミニウム合金箔により形成することがより好ましい。
本発明の包装材料において、熱融着性樹脂層4は、最内層に該当し、電池の組み立て時に熱融着性樹脂層同士が熱融着して電池素子を密封する層である。
本発明の包装材料において、接着層5は、バリア層3と熱融着性樹脂層4を強固に接着させるために、これらの間に必要に応じて設けられる層である。
本発明の包装材料においては、意匠性、耐電解液性、耐擦過性、成形性の向上などを目的として、必要に応じて、基材層1の上(基材層1のバリア層3とは反対側)に、必要に応じて、表面被覆層(図示しない)を設けてもよい。表面被覆層は、電池を組み立てた時に、最外層に位置する層である。
本発明の包装材料の製造方法については、所定の組成の各層を積層させた積層体が得られる限り、特に制限されない。本発明の包装材料の製造方法の一例としては、以下の通りである。まず、基材層1、接着剤層2、バリア層3が順に積層された積層体(以下、「積層体A」と表記することもある)を形成する。積層体Aの形成は、具体的には、基材層1上又は必要に応じて表面が化成処理されたバリア層3に、接着剤層2の形成に使用される接着剤を、グラビアコート法、ロールコート法等の塗布方法で塗布・乾燥した後に、当該バリア層3又は基材層1を積層させて接着剤層2を硬化させるドライラミネート法によって行うことができる。
本発明の包装材料は、食品、薬品、電池素子などを収容するための包装体(包装材料が内容物を収容できるように成形されたもの)として、幅広い分野で使用される。本発明の包装体を用いて食品、薬品、電池素子などの内容物を収容する場合、包装体のシーラント部分が内側(内容物と接する面)になるようにして用いられる。
<包装材料の製造>
それぞれ、基材層の上に、両面に化成処理を施したアルミニウム箔(JIS H4160:1994 A8021H−O)からなるバリア層をドライラミネート法により積層させた。具体的には、バリア層の一方面に、2液型ウレタン接着剤(ポリオール化合物と芳香族イソシアネート系化合物)を塗布し、バリア層上に接着剤層(厚さ3μm)を形成した。次いで、バリア層上の接着剤層と基材層を積層した後、エージング処理を実施することにより、基材層/接着剤層/バリア層の積層体を作製した。なお、バリア層として使用したアルミニウム箔の化成処理は、フェノール樹脂、フッ化クロム化合物、及びリン酸からなる処理液をクロムの塗布量が10mg/m2(乾燥質量)となるように、ロールコート法によりアルミニウム箔の両面に塗布し、焼付けすることにより行った。
実施例1:ナイロン(25μm)/接着剤層(3μm)/アルミニウム箔(40μm)/カルボン酸変性ポリプロピレン(23μm)/ポリプロピレン(23μm)
実施例2:ナイロン(25μm)/接着剤層(3μm)/アルミニウム箔(25μm)/カルボン酸変性ポリプロピレン(14μm)/ポリプロピレン(10μm)
実施例3:ナイロン(25μm)/接着剤層(3μm)/アルミニウム箔(25μm)/カルボン酸変性ポリプロピレンと硬化剤の硬化物(2μm)/未延伸ポリプロピレン(25μm)
実施例4:ナイロン(25μm)/接着剤層(3μm)/アルミニウム箔(35μm)/カルボン酸変性ポリプロピレンと硬化剤の硬化物(2μm)/未延伸ポリプロピレン(30μm)
実施例5:PET(12μm)/接着剤(3μm)/ナイロン(15μm)/接着剤層(3μm)/アルミニウム箔(40μm)/カルボン酸変性ポリプロピレン(40μm)/ポリプロピレン(40μm)
比較例2:ナイロン(15μm)/接着剤層(3μm)/アルミニウム箔(35μm)/カルボン酸変性ポリプロピレン(20μm)/ポリプロピレン(15μm)
比較例3:PET(12μm)/接着剤層(3μm)/アルミニウム箔(25μm)/カルボン酸変性ポリプロピレンと硬化剤の硬化物(2μm)/未延伸ポリプロピレン(25μm)
比較例4:ナイロン(15μm)/接着剤層(3μm)/アルミニウム箔(35μm)/カルボン酸変性ポリプロピレンと硬化剤の硬化物(2μm)/未延伸ポリプロピレン(30μm)
上記で得られた各包装材料について、それぞれ、MD及びTDにおける単位幅1m当りの破断エネルギーは、各包装材料のMD及びTDについて、それぞれ、下記試験条件にて引張試験を行った際に計測される「試験力−変位量の曲線」のデータを取得し、当該データをcsvファイル形式で保存し、表計算ソフト(マイクロソフト社のExcel(登録商標))を用いて積層体が破断するまでの当該データの積分を行って算出した。このとき、当該表計算ソフトによって、各包装材料の1m幅当たりの破断エネルギーに変換(0.015で除する)して算出した。そして、MDにおける単位幅1m当りの破断エネルギーとTDにおける単位幅1m当りの破断エネルギーを合計した。なお、測定対象とする包装材料は、それぞれ5つずつ用意し、5つのサンプルについての破断エネルギー値のうち、最大値と最小値を除く3つの値の平均を、積層体の破断エネルギーとした。結果を表1に示す。
(試験条件)
・試験速度50mm/min
・試験片の幅:15mm
・試験片の長さ:100mm
・標点間距離:30mm
上記で得られた各包装材料について、それぞれ、JIS Z1707:1995の規定に準拠した方法により、基材層側から突刺し強さを測定した。なお、突刺し強さの測定装置としては、イマダ社製のZP−50N(フォースゲージ)とMX2−500N(測定スタンド)を用いた。結果を表1に示す。
上記で得られた各包装材料について、それぞれ、JIS K7124−2:1999の規定に準拠した方法により、基材層側から全貫通エネルギーを測定した。なお、測定装置としては、落錘型グラフィックインパクトテスター(東洋精機製)を用いた。また、測定条件は、ハンマー重量6.4kg、落下高さ300mm、サンプルクランプ径40mmφ、ハンマー径12.7mmφ、ハンマー形状は半球状とした。結果を表1に示す。
上記の包装材料の製造において使用した基材層、バリア層、さらに接着層と熱融着性樹脂層との積層体を準備し、それぞれ、JIS Z1707:1995の規定に準拠した方法により、基材層側から突刺し強さを測定した。なお、突刺し強さの測定装置としては、イマダ社製のZP−50N(フォースゲージ)とMX2−500N(測定スタンド)を用いた。結果を表1に示す。
上記で得られた各包装材料を90mm×150mmに裁断した後、32mm×55mmの口径の成型金型(メス型)とこれに対応した成型金型(オス型)にて、0.9MPaで3.0mmの深さに冷間成型し、その中心部分に凹部を形成した。この凹部に幅30mm×長さ52mm×厚さ3mmのPET樹脂を擬似的に電池素子として設置した。次に、上記の成型品の未成型部をシーラント面が対向するように折り曲げ、周縁部をヒートシールして、擬似電池を作製した。なお、ヒートシールの条件は、190℃、面圧1.0MPa、3秒間とした。
2 接着剤層
3 バリア層
4 熱融着性樹脂層
5 接着層
Claims (8)
- 少なくとも、基材層、バリア層、及び熱融着性樹脂層をこの順に備える積層体から構成されており、
前記積層体は、下記試験条件にて引張試験を行った際に計測される、試験力−変位量の曲線から算出される単位幅1m当りの破断エネルギーが、前記積層体の厚み方向とは垂直方向の一方向と、前記一方向及び前記積層体の厚み方向とは垂直方向である他方向の合計で400J以上である、包装材料。
(試験条件)
試験速度:50mm/min
試験片の幅:15mm
試験片の長さ:100mm
標点間距離:30mm - 前記一方向が前記積層体のMDであり、前記他方向が前記積層体のTDである、請求項1に記載の包装材料。
- 前記積層体は、JIS Z1707:1995の規定に準拠した方法により、前記基材層側から測定される突刺し強さが、23N以上である、請求項1または2に記載の包装材料。
- 前記積層体は、JIS K7124−2:1999の規定に準拠し、下記の測定条件で、前記基材層側から測定される全貫通エネルギーが、1.4J以上である、請求項1〜3のいずれかに記載の包装材料。
(測定条件)
ハンマー重量:6.4kg
落下高さ:300mm
サンプルクランプ径:40mmφ
ハンマー径:12.7mm
ハンマーの形状:半球状 - 前記基材層の厚みが、20μm以上である、請求項1〜4のいずれかに記載の包装材料。
- 前記バリア層が、アルミニウム箔により構成されている、請求項1〜5のいずれかに記載の包装材料。
- 電池素子を収容するために用いられる、請求項1〜6のいずれかに記載の包装材料。
- 少なくとも正極、負極、及び電解質を備えた電池素子が、請求項1〜7のいずれかに記載の包装材料により形成された包装体中に収容されている、電池。
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