CN107078237A - 电池用包装材料 - Google Patents
电池用包装材料 Download PDFInfo
- Publication number
- CN107078237A CN107078237A CN201580053018.0A CN201580053018A CN107078237A CN 107078237 A CN107078237 A CN 107078237A CN 201580053018 A CN201580053018 A CN 201580053018A CN 107078237 A CN107078237 A CN 107078237A
- Authority
- CN
- China
- Prior art keywords
- coat
- packing material
- battery use
- resin
- use packing
- 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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- 239000000463 material Substances 0.000 title claims abstract description 156
- 238000012856 packing Methods 0.000 title claims abstract description 123
- 229920005989 resin Polymers 0.000 claims abstract description 138
- 239000011347 resin Substances 0.000 claims abstract description 138
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 64
- 230000004888 barrier function Effects 0.000 claims abstract description 63
- 239000000565 sealant Substances 0.000 claims abstract description 44
- 230000015556 catabolic process Effects 0.000 claims abstract description 30
- 230000033228 biological regulation Effects 0.000 claims abstract description 27
- -1 amidine compound Chemical class 0.000 claims description 77
- 238000000034 method Methods 0.000 claims description 55
- 239000000049 pigment Substances 0.000 claims description 36
- 239000000975 dye Substances 0.000 claims description 35
- 230000015572 biosynthetic process Effects 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 24
- 238000003475 lamination Methods 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000010276 construction Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 13
- 239000011888 foil Substances 0.000 claims description 13
- 229920000178 Acrylic resin Polymers 0.000 claims description 12
- 239000004925 Acrylic resin Substances 0.000 claims description 12
- 229920005749 polyurethane resin Polymers 0.000 claims description 11
- 239000003822 epoxy resin Substances 0.000 claims description 10
- 229920000647 polyepoxide Polymers 0.000 claims description 10
- 239000005022 packaging material Substances 0.000 claims description 9
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical class C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine Substances NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 7
- 229920001721 polyimide Polymers 0.000 claims description 7
- 229920003180 amino resin Polymers 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- 239000001023 inorganic pigment Substances 0.000 claims description 5
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- 238000007789 sealing Methods 0.000 claims description 3
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 claims description 2
- 229920001225 polyester resin Polymers 0.000 claims description 2
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- 239000000758 substrate Substances 0.000 abstract description 11
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- 238000012545 processing Methods 0.000 description 26
- 125000000524 functional group Chemical group 0.000 description 24
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- 125000004122 cyclic group Chemical group 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
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- 150000001412 amines Chemical class 0.000 description 7
- 239000007767 bonding agent Substances 0.000 description 7
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 7
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- 238000004132 cross linking Methods 0.000 description 7
- 239000012948 isocyanate Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 150000001336 alkenes Chemical class 0.000 description 6
- 238000005576 amination reaction Methods 0.000 description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
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- 125000000217 alkyl group Chemical group 0.000 description 5
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 4
- RAABOESOVLLHRU-UHFFFAOYSA-N diazene Chemical compound N=N RAABOESOVLLHRU-UHFFFAOYSA-N 0.000 description 4
- 229910000071 diazene Inorganic materials 0.000 description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 4
- 150000004693 imidazolium salts Chemical class 0.000 description 4
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
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- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium group Chemical group [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 4
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 3
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 3
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 150000008065 acid anhydrides Chemical class 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M acrylate group Chemical group C(C=C)(=O)[O-] NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229940000489 arsenate Drugs 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
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- 239000003431 cross linking reagent Substances 0.000 description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 3
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- 125000000623 heterocyclic group Chemical group 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
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- 238000004381 surface treatment Methods 0.000 description 3
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- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 2
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 description 2
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- GTACSIONMHMRPD-UHFFFAOYSA-N 2-[4-[2-(benzenesulfonamido)ethylsulfanyl]-2,6-difluorophenoxy]acetamide Chemical compound C1=C(F)C(OCC(=O)N)=C(F)C=C1SCCNS(=O)(=O)C1=CC=CC=C1 GTACSIONMHMRPD-UHFFFAOYSA-N 0.000 description 2
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- 102100031007 Cytosolic non-specific dipeptidase Human genes 0.000 description 2
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Classifications
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Abstract
本发明提供一种膜状的电池用包装材料,其是通过代替现有的膜状的电池用包装材料中的粘接层和基材层,而设置涂覆层作为最外表层,由此能够实现薄膜化的膜状的电池用包装材料,其具备优异的成型性和绝缘性,而且能够实现前置时间的短缩化。该电池用包装材料为至少依次具有涂覆层、阻挡层和密封层的叠层体,上述涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,上述叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,根据上述涂覆层的JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。
Description
技术领域
本发明涉及一种电池用包装材料,其是通过在阻挡层上设置涂覆层作为最外表层而薄膜化的膜状的电池用包装材料,具有优异的成型性和绝缘性,而且前置时间也能够短缩化。
背景技术
以往,开发了各种类型的电池,但在所有电池中,为了封装电极、电解质等电池元件,包装材料是不可缺少的部件。以往,作为电池用包装材料大多使用金属制的包装材料。
另一方面,伴随电动汽车、混合动力电动汽车、个人电脑、相机、便携电话等的高性能化,对于电池要求多样的形状,还要求薄型化、轻量化。然而,以往多用的金属制的电池用包装材料存在难以追随形状的多样化、而且轻量化也存在限制的缺点。
因此,作为容易加工成多种形状且能够实现薄型化、轻量化的电池用包装材料,提出了依次叠层有基材层/粘接层/阻挡层/密封层的膜状的叠层体(例如参照专利文献1)。这样的膜状的电池用包装材料形成为能够通过使密封层彼此相对并利用热封将周缘部热熔接来封装电池元件。
另一方面,近年来,对于电池的小型化和薄型化的期望越来越高,为了迎合该期望,膜状的电池用包装材料也要求进一步的薄膜化。作为将膜状的电池用包装材料全体薄膜化的方法,可以列举将使用厚度10~20μm左右的树脂膜的基材层薄膜化的方法。然而,在树脂膜的薄膜化中存在制造上的限制,而且还有由于树脂膜的薄膜化所需要的加工成本而导致电池用包装材料的制造成本也上升的问题。
另外,由于与树脂膜相比,通过涂敷热固性树脂而形成的涂覆层能够大幅减小膜厚,所以在使膜状的电池用包装材料全体薄膜化时,将叠层在阻挡层上的粘接层和基材层替换成由热固性树脂形成的涂覆层也有效。
然而,在膜状的电池用包装材料中,在由热固性树脂形成涂覆层来代替粘接层和基材层的情况下,需要在固化工序中进行数日~数周的高温条件下的老化,因此导致前置时间的长期化,还存在由于长期暴露于高温条件、温度变化而产生制品不良的问题。
另外,近年来,对电池性能的进一步提高的迫切希望不胜枚举,伴随于此,还要求电池容量的增大。膜状的电池用包装材料通过深拉深成型等被加工成规定的形状来封装电池元件,因此,就实现电池容量的增大而言,要求使膜状的电池用包装材料的成型性提高,使成型深度(成型时的伸长)增大。另外,对于电池用包装材料还要求绝缘性优异。
以这样的现有技术为背景,在通过设置涂覆层来代替粘接层和基材层而实现了薄膜化的膜状的电池用包装材料中,确认到开发了能够实现优异的成型性和绝缘性、以及前置时间的短缩化的技术。
现有技术文献
专利文献
专利文献1:日本特开2001-202927号公报
发明内容
发明所要解决的课题
本发明的目的在于提供一种膜状的电池用包装材料,其是通过代替以往的膜状的电池用包装材料中的粘接层和基材层而设置涂覆层作为最外表层,能够实现薄膜化的膜状的电池用包装材料,该膜状的电池用包装材料具备优异的成型性和绝缘性,而且能够实现前置时间的短缩化。
用于解决课题的方法
本发明的发明人为了解决上述课题,进行了深入研究,通过在包含至少依次叠层有涂覆层、阻挡层和密封层的叠层体的电池用包装材料中,该涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,上述叠层体的根据JIS1707:1997的规定所测定的刺破强度为5N以上,且涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上,由此意外地发现成型性提高,而且前置时间也能够短缩化。另外发现,由于形成该电池用包装材料的涂覆层的绝缘击穿电压为1.0kV以上,所以可以有效地提高作为电池用包装材料的绝缘性。本发明是基于这些发现进一步反复研究而完成的。
即,本发明提供下述所示方式的发明。
项1.一种电池用包装材料,其为至少依次具有涂覆层、阻挡层和密封层的叠层体,
上述涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,
上述叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,
上述涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。
项2.如项1所述的电池用包装材料,其中,上述涂覆层为从最外表面侧到阻挡层侧依次配置有第一涂覆层、第二涂覆层和第三涂覆层的3层结构。
项3.如项1或2所述的电池用包装材料,其中,上述涂覆层的至少1个层的形成所使用的上述树脂组合物包含颜料和/或染料。
项4.如项3所述的电池用包装材料,其中,上述涂覆层的至少1个层的形成所使用的上述树脂组合物包含无机颜料。
项5.如项1~4中任一项所述的电池用包装材料,其中,上述热固性树脂为选自环氧树脂、氨基树脂、丙烯酸树脂、聚氨酯树脂、酚醛树脂、不饱和聚酯树脂、聚酰亚胺树脂和醇酸树脂中的至少1种。
项6.如项1~5中任一项所述的电池用包装材料,其中,上述固化促进剂为选自脒化合物、碳化二亚胺化合物、酮亚胺化合物、肼化合物、锍盐、苯并噻唑鎓盐和叔胺化合物中的至少1种。
项7.如项1~6中任一项所述的电池用包装材料,其中,上述阻挡层为金属箔。
项8.如项1~7中任一项所述的电池用包装材料,其中,电池用包装材料全体的厚度为40~120μm。
项9.如项1~8中任一项所述的电池用包装材料的制造方法,其包括:
在阻挡层之上涂布包含热固性树脂和固化促进剂的树脂组合物,加热使其固化的涂覆层形成工序;和
在上述涂覆层形成工序之前或之后,在阻挡层的叠层涂覆层的面的相反侧的面叠层密封层的工序。
项10.一种电池,至少具备正极、负极和电解质的电池元件收纳在项1~8中任一项所述的电池用包装材料内。
项11.一种电池的制造方法,其包括:
用电池用包装材料收纳至少具备正极、负极和电解质的电池元件的工序,
上述电池用包装材料为至少依次具有涂覆层、阻挡层和密封层的叠层体,
上述涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,
上述叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,
上述涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。
项12.叠层体作为电池用包装材料的使用,其中,
该叠层体为至少依次具有涂覆层、阻挡层和密封层的叠层体,
上述涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,
上述叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,
上述涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。
发明的效果
本发明的电池用包装材料由至少依次具有涂覆层、阻挡层和密封层的叠层体构成,没有像以往的膜状的电池用包装材料那样在阻挡层上设置粘接层和基材层,因此能够实现薄膜化,有助于电池的小型化和薄膜化。
另外,本发明的电池用包装材料通过构成电池用包装材料的叠层体的根据JIS1707:1997的规定所测定的刺破强度为5N以上,且涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上,从而能够具备优异的成型性和绝缘性,即使将深拉深成型时的成型深度加深,也能够抑制裂纹和针孔等的产生。
另外,由于形成电池用包装材料的涂覆层的绝缘击穿电压为1.0kV以上,所以有效地提高了作为电池用包装材料的绝缘性。
此外,本发明的电池用包装材料由于设置在阻挡层上的涂覆层由含有热固性树脂和固化促进剂的树脂组合物的固化物形成,所以在涂覆层的固化工序中,不需要高温条件下的老化,能够以短时间固化,因此能够实现前置时间的短缩化,进而还能够防止由长时间暴露在高温条件下而导致的制品不良的发生。
附图说明
图1是表示本发明的电池用包装材料的剖图结构的一例的图。
图2是表示本发明的电池用包装材料的剖图结构的一例的图。
具体实施方式
本发明的电池用包装材料为至少依次具有涂覆层、阻挡层和密封层的叠层体,涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,构成电池用包装材料的叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,且涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。以下,对于本发明的电池用包装材料进行详细叙述。
1.电池用包装材料的叠层结构
如图1所示,本发明的电池用包装材料具有包含至少依次具有涂覆层1、阻挡层2和密封层3的叠层体的叠层结构。在本发明的电池用包装材料中,涂覆层1既可以为单层,也可以是由2个以上的层构成的多层。
作为上述涂覆层1,为了使其具备能够赋予充分的绝缘性的程度的厚膜,优选列举由2个以上的层构成的多层、更优选列举由2或3个层构成的多层、特别优选由3个层构成的多层。图2表示上述涂覆层1为从最外表面到阻挡层2侧依次具有第一涂覆层1a、第二涂覆层1b和第三涂覆层1c的3层结构时的本发明的电池用包装材料的叠层结构。
在本发明的电池用包装材料中,涂覆层1为最外表面层,密封层3为最内层。即,在组装电池时,通过位于电池元件的边缘的密封层3彼此热熔接而将电池元件密封,从而封装电池元件。
另外,在本发明的电池用包装材料中,也可以在阻挡层2与密封层3之间,以提高它们的粘接性为目的,根据需要设置粘接层4。
2.形成电池用包装材料的各层的组成
[涂覆层1]
在本发明的电池用包装材料中,涂覆层1设置在阻挡层2之上,是形成电池用包装材料的最外表层的层。另外,涂覆层1具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构。即,在本发明的电池用包装材料中,涂覆层是指涂敷在阻挡层侧(密封层的相反侧)的层,是由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的树脂层。此外,在本发明的电池用包装材料中,根据JIS 1707:1997的规定所测定的刺破强度为5N以上,且涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。如上所述,在本发明的电池用包装材料中,通过形成电池用包装材料的叠层体的上述刺破强度和涂覆层1的绝缘击穿电压具有这些值,意外地使电池用包装材料的成型性飞跃性地提高,进而也能够使绝缘性提高。
从使电池用包装材料的成型性和绝缘性进一步提高的观点出发,该刺破强度优选为9N以上,更优选为13N以上。在本发明中,“刺破强度”是指通过根据JIS 1707:1997所规定的刺破强度试验的方法测定的最大应力值。
另外,从使本发明的电池用包装材料的成型性和绝缘性进一步提高的观点出发,涂覆层的绝缘击穿电压优选为1.3kV以上,更加优选为1.5kV以上。通过涂覆层的绝缘击穿电压满足这样的值,不仅成型性提高,而且作为电池用包装材料的绝缘性也提高,因此例如能够将收纳在本发明的电池用包装材料中的电池排列多个,适当地组件化。
在本发明的电池用包装材料中,为了将上述的刺破强度设为上述的值,且将绝缘击穿电压设为上述的值,作为形成涂覆层1的热固性树脂和固化促进剂,优选使用以下的物质。
(热固性树脂)
涂覆层1的形成所使用的树脂组合物含有热固性树脂。热固性树脂为加热时发生聚合并形成高分子的网格结构而固化的树脂即可。作为涂覆层1的形成所使用的热固性树脂,没有特别限制,具体可以列举环氧树脂、氨基树脂(三聚氰胺树脂、苯代三聚氰二胺树脂等)、聚酰亚胺树脂、丙烯酸树脂(热固性丙烯酸树脂)、聚氨酯树脂、酚醛树脂、不饱和聚酯树脂、醇酸树脂等。这些热固性树脂既可以单独使用1种,还可以组合使用2种以上。
这些热固性树脂中,从涂覆层1的固化时间的进一步的短缩化、将上述的刺破强度设定在上述的范围、进而将绝缘击穿电压设定在上述的值的观点出发,优选列举聚氨酯树脂、环氧树脂、丙烯酸树脂、聚酰亚胺树脂,更加优选列举2液固化性聚氨酯树脂、2液固化性环氧树脂,特别优选列举2液固化性聚氨酯树脂。
作为2液固化性聚氨酯树脂,具体可以列举多元醇化合物(主剂)与异氰酸酯系化合物(固化剂)的组合,作为2液固化性环氧树脂,具体可以列举环氧树脂(主剂)与酸酐、胺化合物或氨基树脂(固化剂)的组合。
在上述2液固化性聚氨酯树脂中,对于作为主剂使用的多元醇化合物,没有特别限制,可以列举例如聚酯多元醇、聚酯聚氨酯多元醇、聚醚多元醇、聚醚聚氨酯多元醇等。这些多元醇化合物既可以单独使用1种,还可以组合使用2种以上。
另外,在上述2液固化性聚氨酯树脂中,对于作为固化剂使用的异氰酸酯系化合物,没有特别限制,可以列举例如聚异氰酸酯、其加合体、其异氰脲酸酯改性体、其碳化二亚胺改性体、其脲基甲酸酯改性体、其缩二脲改性体等。作为上述聚异氰酸酯,具体可以列举二苯基甲烷二异氰酸酯(MDI)、聚苯基甲烷二异氰酸酯(聚合MDI)、甲苯二异氰酸酯(TDI)、六亚甲基二异氰酸酯(HDI)、双(4-异氰酸酯环己基)甲烷(H12MDI)、异佛尔酮二异氰酸酯(IPDI)、1,5-萘二异氰酸酯(1,5-NDI)、3,3'-二甲基-4,4'-二亚苯基二异氰酸酯(TODI)、二甲苯二异氰酸酯(XDI)等的芳香族二异氰酸酯;四亚甲基二异氰酸酯、六亚甲基二异氰酸酯、三甲基六亚甲基二异氰酸酯、异佛尔酮二异氰酸酯等的脂肪族二异氰酸酯;4,4’-亚甲基双(环己基异氰酸酯)、异佛尔酮二异氰酸酯等的脂环族二异氰酸酯;1,5-萘二异氰酸酯(1,5-NDI)等的多环芳香族二异氰酸酯等。作为上述加合体,具体可以列举在上述聚异氰酸酯上加成了三羟甲基丙烷、乙二醇等的物质。这些异氰酸酯系化合物既可以单独使用1种,还可以组合使用2种以上。
在单层结构的涂覆层1的情况、或多层结构的涂覆层1中位于最外表层的层中,作为热固性树脂,使用具有多环芳香族骨架和/或杂环骨架的树脂时,还能够具有更加优异的耐药品性。作为具有多环芳香族骨架的热固性树脂,具体可以列举具有多环芳香族骨架的环氧树脂、具有多环芳香族骨架的聚氨酯树脂。另外,作为具有杂环骨架的热固性树脂,可以列举三聚氰胺树脂、苯代三聚氰二胺树脂等的氨基树脂。这些具有多环芳香族骨架和/或杂环骨架的热固性树脂可以为1液固化型或2液型固化型的任意类型。
作为具有多环芳香族骨架的环氧树脂,更具体地可以列举二羟基萘与表卤代醇的反应物;萘酚和醛类的缩合物(萘酚酚醛清漆树脂)与表卤代醇的反应物;二羟基萘和醛类的缩合物与表卤代醇的反应物;单或二羟基萘和苯二甲醇类的缩合物与表卤代醇的反应物;单或二羟基萘和二烯化合物的加成物与表卤代醇的反应物;萘酚彼此直接偶联得到的聚萘酚类与表卤代醇的反应物等。
作为具有多环芳香族骨架的聚氨酯树脂,更具体地可以列举多元醇化合物与具有多环芳香族骨架的异氰酸酯系化合物的反应物。
(固化促进剂)
涂覆层1的形成所使用的树脂组合物含有固化促进剂。这样,通过使固化促进剂与热固性树脂共存,则在制造时不需要高温条件下的老化,能够在短时间内使涂覆层固化,能够缩短前置时间。
这里,“固化促进剂”是指虽然自己不形成交联结构,但是促进热固性树脂的交联反应的物质,具有促进热固性树的交联反应的作用,也是有时自己也形成交联结构的物质。
关于固化促进剂的种类,根据使用的热固性树脂,以能够满足上述的硬度的方式适当选择,可以列举例如脒化合物、碳化二亚胺化合物、酮亚胺化合物、肼化合物、锍盐、苯并噻唑鎓盐、叔胺化合物等。
作为上述脒化合物,没有特别限制,可以列举例如咪唑化合物、1,8-二氮杂双环[5.4.0]十一碳-7烯(DBU)、1,5-二氮杂双环[4.3.0]壬-5-烯(DBN)、胍化合物等。作为上述咪唑化合物,具体可以列举2-甲基咪唑、2-乙基咪唑、2-十一烷基咪唑、2,4-二甲基咪唑、2-十七烷基咪唑、1,2-二甲基咪唑、1,2-二乙基咪唑、2-乙基-4-甲基咪唑、2-苯基咪唑、1-苄基-2-苯基咪唑、1-氰基乙基-2-甲基咪唑、1-氰基乙基-2-十一烷基咪唑、1-苄基-2-甲基咪唑、2,4-二氨基-6-[2'-甲基咪唑基-(1)']-乙基-S-三嗪、2,4-二氨基-6-[2'-乙基-4'-甲基咪唑基-(1)']-乙基-S-三嗪、2,4-二氨基-6-[2'-十一烷基咪唑基]-乙基-S-三嗪、2,4-二氨基-6-[2'-甲基咪唑基-(1)']-乙基-S-三嗪异氰脲酸化加成物、2-苯基-4-甲基-5-羟基甲基咪唑、2-苯基-4,5-二羟基甲基咪唑、2-芳基-4,5-二苯基咪唑等。这些脒化合物既可以单独使用1种,还可以组合使用2种以上。
作为上述碳化二亚胺化合物,没有特别限制,可以列举例如N,N’-二环己基碳化二亚胺、N,N’-二异丙基碳化二亚胺、1-乙基-3-(3-二甲基氨基丙基)碳化二亚胺、N-[3-(二甲基氨基)丙基]-N’-乙基碳化二亚胺、N-[3-(二甲基氨基)丙基]-N'-乙基碳化二亚胺甲碘化物、N-叔丁基-N’-乙基碳化二亚胺、N-环己基-N’-(2-吗啉代乙基)碳化二亚胺甲基-对甲苯磺酸盐、N,N’-二-叔丁基碳化二亚胺、N,N’-二-对甲苯基碳化二亚胺等。这些碳化二亚胺化合物既可以单独使用1种,还可以组合使用2种以上。
作为上述酮亚胺化合物,只要具有酮亚胺键(N=C),则没有特别限制,可以列举例如使酮与胺反应得到的酮亚胺化合物。作为上述酮,具体可以列举甲乙酮、甲基异丙基酮、甲基叔丁基酮、甲基环己基酮、二乙基甲酮、乙基丙基酮、乙基丁基酮、二丙基酮、二丁基酮、二异丁基酮等。另外,作为上述胺,作为具体例,具体可以列举邻苯二胺、间苯二胺、对苯二胺、间苯二甲基二胺、二氨基二苯基甲烷、二氨基二苯基砜、二氨基二乙基二苯基甲烷等的芳香族多胺;乙二胺、丙二胺、丁二胺、二亚乙基三胺、三亚乙基四胺、四亚乙基五胺、五亚乙基六胺、六亚甲基二胺、三甲基六亚甲基二胺、1,2-丙烷二胺、亚氨基二丙胺、甲基亚氨基二丙胺等的脂肪族多胺;N-氨基乙基哌嗪、3-丁氧基异丙基胺等的在主链具有醚键的单胺或聚醚骨架的二胺;异佛尔酮二胺、1,3-双氨基甲基环己烷、1-环己基氨基-3-氨基丙烷、3-氨基甲基-3,3,5-三甲基环己基胺等的脂环式多胺;降冰片烷骨架的二胺;在聚酰胺的分子末端具有氨基的聚酰胺型胺;2,5-二甲基-2,5-六亚甲基二胺、烷二胺(メンセンジアミン)、1,4-双(2-氨基-2-甲基丙基)哌嗪等。这些酮亚胺化合物既可以单独使用1种,还可以组合使用2种以上。
作为上述肼化合物,没有特别限制,可以列举例如己二酸二酰肼、间苯二甲酸二酰肼等。这些肼化合物既可以单独使用1种,还可以组合使用2种以上。
作为上述锍盐,没有特别限制,可以列举例如4-乙酰苯基二甲基锍六氟锑酸盐、4-乙酰苯基二甲基锍六氟砷酸盐、二甲基-4-(苄基氧基羰基氧基)苯基锍六氟锑酸盐、二甲基-4-(苯甲酰基氧基)苯基锍六氟锑酸盐、二甲基-4-(苯甲酰基氧基)苯基锍六氟砷酸盐等的烷基锍盐;苄基-4-羟基苯基甲基锍六氟锑酸盐、4-乙酰氧基苯基苄基甲基锍六氟锑酸盐、苄基-4-甲氧基苯基甲基锍六氟锑酸盐、苄基-3-氯-4-羟基苯基甲基锍六氟砷酸盐、4-甲氧基苄基-4-羟基苯基甲基锍六氟磷酸盐等的苄基锍盐;二苄基-4-羟基苯基锍六氟锑酸盐、二苄基-4-羟基苯基锍六氟磷酸盐、二苄基-4-甲氧基苯基锍六氟锑酸盐、苄基-4-甲氧基苄基-4-羟基苯基锍六氟磷酸盐等的二苄基锍盐;对氯苄基-4-羟基苯基甲基锍六氟锑酸盐、对硝基苄基-4-羟基苯基甲基锍六氟锑酸盐、3,5-二氯苄基-4-羟基苯基甲基锍六氟锑酸盐、邻氯苄基-3-氯-4-羟基苯基甲基锍六氟锑酸盐等的取代苄基锍盐等。这些锍盐既可以单独使用1种,还可以组合使用2种以上。
作为上述苯并噻唑鎓盐,没有特别限制,可以列举例如3-苄基苯并噻唑鎓六氟锑酸盐、3-苄基苯并噻唑鎓六氟磷酸盐、3-苄基苯并噻唑鎓四氟硼酸盐、3-(对甲氧基苄基)苯并噻唑鎓六氟锑酸盐、3-苄基-2-甲基硫代苯并噻唑鎓六氟锑酸盐、3-苄基-5-氯苯并噻唑鎓六氟锑酸盐等的苄基苯并噻唑鎓盐。这些苯并噻唑鎓盐既可以单独使用1种,还可以组合使用2种以上。
作为上述叔胺化合物,没有特别限制,可以列举例如三甲基胺、三乙基胺、三丙基胺、三丁基胺、三亚乙基二胺、1,4-二氮杂双环[2.2.2]辛烷、奎宁环、3-奎宁醇等的脂肪族叔胺;二甲基苯胺等的芳香族叔胺;异喹啉、吡啶、可力丁(コリジン)、β-甲基吡啶等的杂环叔胺等。这些叔胺化合物既可以单独使用1种,还可以组合使用2种以上。
作为上述固化促进剂的合适的一例,可以列举作为热酸发生剂发挥功能的物质。热酸发生剂是指通过加热产生酸而作为固化促进剂发挥功能的物质。在上述固化促进剂内,能够作为热酸发生剂发挥功能的物质,具体可以列举锍盐、苯并噻唑鎓盐等。
另外,作为上述固化促进剂的另外的合适的一例,可以列举具备在规定的加热条件下(例如80~200℃、优选100~160℃)活性化而促进热固性树脂的交联反应的热潜在性的物质。在上述固化促进剂内,作为热潜在性的物质,具体可以列举在脒化合物、肼化合物、叔胺化合物等上加成环氧化合物得到的环氧加合物。
此外,作为上述固化促进剂的其他合适的一例,可以列举具备如下的水解型潜在性的物质:在密闭状态、即湿气隔绝状态下不发挥作为固化剂的功能,但在将密闭状态打开、湿气存在的条件下,水解并发挥作为固化剂的功能。上述固化促进剂内,作为水解型潜在性的物质,具体可以列举,在脒化合物、肼化合物、叔胺化合物等上加成环氧化合物得到的环氧加合物。
这些固化促进剂既可以单独使用1种,还可以组合使用2种以上。这些固化促进剂中,从将上述的刺破强度设定在上述的范围、进而将绝缘击穿电压设定为上述的值的观点出发,优选列举脒化合物、锍盐,更优选列举脒化合物。
关于涂覆层1的形成所使用的树脂组合物中的固化促进剂的含量,根据所使用的热固性树脂的种类、固化促进剂的种类等适当设定,但从将上述的刺破强度设定在上述的范围、进而将绝缘击穿电压设定为上述的值的观点出发,可以列举例如相对于热固性树脂100质量份,固化促进剂以总量计为0.01~6质量份、优选为0.05~5质量份、更优选为0.1~2质量份。
(颜料和/或染料)
构成涂覆层1的至少1个层可以根据需要含有颜料和/或染料。通过在构成涂覆层1的至少1个层中含有颜料和/或染料,能够对电池用包装材料赋予识别性(通过颜料和/或染料而呈现颜色),进而能够提高电池用包装材料的热传导率,使放热性提高。
在以往的膜状的电池用包装材料中,对每个电池的种类赋予通过色调的识别性时,需要在粘接层或基材层的任意一方配合颜料和/或染料,但在粘接层中配合颜料和/或染料时,存在导致粘接层的粘接强度降低的缺点,在基材层中配合颜料和/或染料时,存在导致基材层的制造成本上升的缺点。对此,在本发明的电池用包装材料中,通过在构成涂覆层的至少1个层中含有颜料和/或染料,能够对电池用包装材料赋予识别性,因此,还能够克服对以往的膜状的电池用包装材料赋予识别性时的缺点。此外,如果构成涂覆层的至少1个层含有颜料和/或染料(特别是无机颜料),则能够提高电池用包装材料的热传导率且使放热性提高,因此还能够有助于电池的安全性的提高。
关于颜料的材质,没有特别限制,可以为无机颜料或有机颜料的任何种类。作为无机颜料,具体可以列举炭黑、碳纳米管、石墨、滑石、二氧化硅、高岭土、蒙脱土(モンモリロイド)、蒙脱石、合成云母、水滑石、沸石、氢氧化铝、氢氧化镁、氧化锌,氧化镁,氧化铝,氧化钕,氧化锑、氧化钛、氧化铈、硫酸钙,硫酸钡、碳酸钙,硅酸钙、碳酸锂、金、铝、铜、镍等。作为有机颜料,具体可以列举偶氮颜料、多环颜料、色淀颜料、荧光颜料等。这些颜料既可以单独使用1种,还可以组合使用2种以上。
关于颜料的形状,也没有特别限制,可以列举例如球状、纤维状、板状、不定形、空心球状等。另外,关于颜料的平均粒径,没有特别限制,可以列举例如0.01~3μm,优选列举0.05~1μm。此外,颜料的平均粒径是使用岛津激光衍射式粒度分布测定装置SALD-2100-WJA1、通过利用压缩空气从喷嘴将作为测定对象的粉体喷射,使其在空气中分散来进行测定的喷射型干式测定方式所测定的值。
可以对于颜料根据需要在表面实施绝缘处理、高分散性处理(树脂包覆处理)等各种表面处理。
另外,关于染料的种类,只要能够溶解或分散在涂覆层1的形成所使用的树脂组合物中,则没有特别限制,能够列举例如硝基染料、偶氮系染料、茋染料、碳鎓染料、喹啉染料、次甲基染料、噻唑染料、醌亚胺(キインイミン)染料、蒽醌染料、靛类染料和酞菁染料等,优选偶氮染料、碳鎓染料、蒽醌染料等。这些染料既可以单独使用1种,还可以组合使用2种以上。
这些颜料和染料中,从使电池用包装材料的放热性进一步提高的观点出发,优选列举颜料,更优选列举无机颜料,更加优选列举炭黑、碳纳米管、石墨等的碳材料,特别优选列举炭黑。
在构成涂覆层1的至少1个层中,含有颜料和/或染料的情况下,关于其含量,根据使用的颜料和/或染料的种类、要对电池用包装材料赋予的识别性、放热性等适当设定即可,可以列举例如相对于含有颜料和/或染料的层所含的热固性树脂100质量份,颜料和/或染料以总量计为1~30质量份。从赋予更加优异的识别性的观点出发,可以列举相对于含有颜料和/或染料的层所含的热固性树脂100质量份,颜料和/或染料以总量计为3~20质量份。另外,从更加优异的识别性,并且抑制由颜料和/或染料所造成的成型性的降低的观点出发,可以列举相对于含有颜料和/或染料的层所含的热固性树脂100质量份,颜料和/或染料以总量计为5~15质量份。
(其他的添加剂)
涂覆层1的形成所使用的树脂组合物中除了上述成分以外,还可以根据需要含有有机填料、增滑剂、溶剂、弹性体树脂等其他的添加剂。
特别是,在涂覆层1为单层结构的情况、或多层结构的位于最外表层的层中,如果包含增滑剂,则能够使加压成型、压花加工中的成型、加工性提高,使操作性变得良好。
关于有机填料的种类,没有特别限制,可以列举例如高熔点尼龙、交联丙烯酸、交联苯乙烯、交联聚乙烯、苯代三聚氰二胺等。另外,关于有机填料的形状,也没有特别限制,可以列举例如球状、纤维状、板状、不定形、空心球状等。
另外,作为增滑剂,没有特别限制,既可以是非反应性增滑剂,还可以是反应性增滑剂。特别是,反应性增滑剂具有增滑剂不易从涂覆层1渗漏丧失、能够抑制使用时发生吹粉或背面转移(裏移り)或者涂覆层1的润滑效果经时地降低的现象的优点,因此,在增滑剂中,优选列举反应性增滑剂。
其中,非反应性增滑剂是指不具有与热固性树脂反应而化学地结合的官能团、能够赋予润滑性(滑动性)的化合物。另外,反应性增滑剂是指具有与上述热固性树脂反应而化学地结合的官能团、且能够赋予润滑性(滑动性)的化合物。
作为非反应性增滑剂,具体可以列举例如脂肪酸酰胺、金属皂、亲水性有机硅、接枝了有机硅的丙烯酸、接枝了有机硅的环氧、接枝了有机硅的聚醚、接枝了有机硅的聚酯、嵌段型有机硅丙烯酸共聚物、聚甘油改性有机硅、石蜡等。这些非反应性增滑剂既可以单独使用1种,还可以组合使用2种以上。
另外,在反应性增滑剂中,关于官能团的种类,根据使用的热固性树脂的种类适当设定,可以列举例如羟基、巯基、水解性硅烷基、异氰酸酯基、环氧基、聚合性乙烯基、(甲基)丙烯酰基等。在反应性增滑剂中,关于每1个分子的官能团数,没有特别限制,可以列举例如1~3个、优选列举1或2个。
作为反应性增滑剂,具体可以列举具有上述官能团的改性有机硅;具有上述官能团的改性氟树脂;对于硬脂酸酰胺、油酸酰胺、芥酸酰胺、亚乙基双硬脂酸酰胺等的脂肪酸酰胺导入了上述官能团的化合物;导入了上述官能团的金属皂;导入了上述官能团的石蜡等。这些反应性增滑剂既可以单独使用1种,还可以组合使用2种以上。这些反应性增滑剂之中,优选列举具有上述官能团的改性有机硅、具有上述官能团的氟树脂、具有上述官能团的有机硅改性树脂。作为上述改性有机硅,具体可以列举如嵌段聚合有丙烯酸树脂的改性有机硅等那样、嵌段聚合了具有上述官能团的聚合物的改性有机硅;如接枝聚合有丙烯酸酯的改性有机硅等那样、接枝聚合了具有上述官能团的单体的改性有机硅等。另外,作为上述改性氟树脂,具体可以列举如接枝聚合有丙烯酸酯的氟树脂等那样、接枝聚合了具有上述官能团的单体的改性氟树脂;如嵌段聚合有丙烯酸树脂的改性氟树脂等那样、嵌段聚合了具有上述官能团的聚合物的氟树脂等。另外,作为上述有机硅改性树脂,具体可以列举,如在具有上述官能团的丙烯酸树脂上接枝聚合了有机硅的有机硅改性丙烯酸树脂等那样、具有上述官能团且接枝聚合了有机硅的有机硅改性树脂等。另外,作为上述改性氟树脂,具体可以列举如接枝聚合有丙烯酸酯的氟树脂等那样、接枝聚合了具有上述官能团的单体的改性氟树脂;如嵌段聚合有丙烯酸树脂的改性氟树脂等那样、嵌段聚合了具有上述官能团的聚合物的氟树脂等。这些中,作为特别优选的反应性增滑剂,可以列举具有上述官能团的单体或聚合物在有机硅的一个末端聚合得到的改性有机硅;具有上述官能团的单体或聚合物在氟树脂的一个末端聚合得到的改性氟树脂。作为这样的改性有机硅和改性氟树脂,市售有例如“MODIPER(注册商标)F·FS系列”(日油株式会社制)、“SYMAC(注册商标)系列”(东亚合成株式会社制)等,也能够使用这些市售品。
这些增滑剂既可以单独使用1种,还可以组合使用2种以上。
在涂覆层1为单层结构的情况,或多层结构的位于最外表层的层中,含有增滑剂时,关于其含量,没有特别限制,可以列举例如相对于热固性树脂100质量份,增滑剂以总量计为1~12质量份、优选为3~10质量份、更优选为5~8质量份。
另外,涂覆层1为多层结构时,如果在位于最外表面的层以外的层(即,设置在构成涂覆层1的最外表面的层与阻挡层2之间的层)中含有弹性体树脂,则能够抑制涂覆层1固化时收缩的现象,并且能够对涂覆层1赋予适度的柔软性,能够使成型性进一步提高。
作为弹性体树脂,既可以是具有能够与上述热固性树脂交联的官能团并固化时与上述热固性树脂交联的树脂,另外,也可以是不具有这样的官能团并且即使固化也不与上述热固性树脂交联的树脂。关于弹性体树脂的种类,没有特别限制,可以列举例如包含乙烯和1种或2种以上的碳原子数2~20的α-烯烃(不包括乙烯)作为构成单体的乙烯系弹性体等的聚烯烃系弹性体;苯乙烯系弹性体;聚酯系弹性体;聚氨酯系弹性体;丙烯酸系弹性体;双酚A型环氧系弹性体等的环氧系弹性体;聚酯多元醇、聚酯聚氨酯多元醇、聚醚多元醇、聚醚聚氨酯多元醇等的多元醇系弹性体;丁腈橡胶、氟橡胶、丙烯酸橡胶、有机硅橡胶、氯丁二烯橡胶、异戊二烯橡胶、丁二烯橡胶等的橡胶成分等。这些弹性体树脂中,优选列举聚氨酯系弹性体、环氧系弹性体、多元醇系弹性体。
这些弹性体树脂既可以单独使用1种,还可以组合使用2种以上。
在涂覆层1为多层结构时,在位于最外表面的层以外的层(即,设置于构成涂覆层1的最外表面的层与阻挡层2之间的层)中,含有弹性体树脂时,关于其含量,没有特别限制,可以列举例如相对于热固性树脂100质量份,增滑剂以总量计为3~50质量份、优选为5~30质量份、更优选为10~20质量份。
(涂覆层1的合适的层结构)
如上所述,涂覆层1既可以为单层结构,也可以为由2个以上的层构成的多层结构,但为了具备能够将上述的刺破强度设定在上述的范围、进而能够将绝缘击穿电压设定为上述的值的程度的厚膜,优选列举由2个以上的层构成的多层结构、更优选由2或3个层构成的多层结构、特别优选由3个层构成的多层结构。
在将涂覆层1设为由2个层构成的多层结构时、即、在2层结构的涂覆层1中含有颜料和/或染料的情况下,颜料和/或染料包含在上述第一涂覆层1a和第二涂覆层1b的任意至少一个层中即可。从减小电池用包装材料的成型后的、经成型的部分和没有成型的部分的色调的差的观点出发,颜料和/或染料优选包含在上述第一涂覆层1a和第二涂覆层1b的双方中。
另外,在将涂覆层1设为由3个层构成的多层时、即、在3层结构的涂覆层1中含有颜料的情况下,颜料和/或染料包含在上述第一涂覆层1a、第二涂覆层1b和第三涂覆层1c的任意至少一个层中即可。从减小电池用包装材料的成型后的、经成型的部分和没有成型的部分的色调的差的观点出发,颜料和/或染料优选包含在上述第一涂覆层1a、第二涂覆层1b和第三涂覆层1c中的至少2个层中,更优选这3个层全部都包含。
(涂覆层1的厚度)
关于涂覆层1全体的厚度,没有特别限制,为了具备能够将刺破强度设定在上述的范围、进而能够赋予上述的绝缘击穿电压的程度的厚膜,可以列举例如4~20μm左右、优选为6~18μm左右。更具体而言,如果是在将涂覆层1设为单层结构的情况下,作为其厚度,可以列举例如2~10μm左右、优选3~7μm左右。另外,如果是将涂覆层1设为由2个以上的层构成的多层结构的情况下,作为各层单独的厚度,可以列举例如1~5μm左右、优选为2~4μm左右。
[阻挡层2]
在本发明的电池用包装材料中,阻挡层2除了提高包装材料的强度以外,还是作为用于防止水蒸气、氧、光等侵入电池内部的阻挡层而发挥功能的层。作为阻挡层2的材质,具体而言,可以列举铝、不锈钢、钛等的金属箔;蒸镀了氧化硅、氧化铝等的无机化合物的膜等。这些中,优选列举金属箔,更优选列举铝箔。为了在电池用包装材料的制造时防止褶皱和针孔,在本发明中,作为阻挡层2,优选使用软质铝箔、例如、经退火处理过的铝(JISA8021P-O)或(JIS A8079P-O)箔等。
关于阻挡层2的厚度,没有特别限制,例如如果是在使用金属箔的情况下,通常可以列举10~200μm,优选列举20~100μm。
另外,在使用金属箔作为阻挡层2时,为了粘接的稳定化、防止溶解或腐蚀等,优选对至少一个面、优选至少对密封层侧的面、更优选对两面进行化学法表面处理。其中,化学法表面处理是指对阻挡层2的表面形成耐酸性覆膜的处理。作为化学法表面处理,例如,可以列举使用硝酸铬、氟化铬、硫酸铬、乙酸铬、草酸铬、磷酸二氢铬、铬酸乙酰乙酸酯、氯化铬、硫酸钾铬等的铬酸化合物的铬酸铬酸盐处理;使用磷酸钠、磷酸钾、磷酸铵、多磷酸等的磷酸化合物的磷酸铬酸盐处理;使用包括下述通式(1)~(4)所示的重复单元的氨基化酚聚合物的铬酸盐处理等。此外,该氨基化酚聚合物中,下述通式(1)~(4)所示的重复单元可以单独含有1种,也可以为2种以上的任意组合。
通式(1)~(4)中,X表示氢原子、羟基、烷基、羟基烷基、烯丙基或苄基。另外,R1和R2相同或不同,表示羟基、烷基或羟基烷基。通式(1)~(4)中,作为X、R1、R2所示的烷基,可以列举例如甲基、乙基、正丙基、异丙基、正丁基、异丁基、叔丁基等的碳原子数1~4的直链或支链状烷基。另外,作为X、R1、R2所示的羟基烷基,可以列举例如羟基甲基、1-羟基乙基、2-羟基乙基、1-羟基丙基、2-羟基丙基、3-羟基丙基、1-羟基丁基、2-羟基丁基、3-羟基丁基、4-羟基丁基等的取代有1个羟基的碳原子数1~4的直链或支链状烷基。在通式(1)~(4)中,X优选为氢原子、羟基和羟基烷基的任意基团。具有通式(1)~(4)所示的重复单元的氨基化酚聚合物的数均分子量可以列举例如约500~约100万、优选列举约1000~约2万。
另外,作为对金属箔赋予耐腐蚀性的化学法表面处理方法,可以列举如下方法:涂敷在磷酸中分散有氧化铝、氧化钛、氧化铈、氧化锡等金属氧化物、硫酸钡的微粒的涂敷液,在150℃以上进行烧制处理,由此,在金属箔的表面形成耐腐蚀处理层。另外,在上述耐腐蚀处理层之上,可以进一步形成将阳离子性聚合物用交联剂交联得到的树脂层。这里,作为阳离子性聚合物,可以列举例如聚乙烯亚胺、由聚乙烯亚胺和具有羧酸的聚合物构成的离子高分子配位化合物、在丙烯酸主骨架接枝有伯胺的伯胺接枝丙烯酸树脂、聚烯丙胺或其衍生物、氨基苯酚等。这些阳离子性聚合物既可以单独使用1种,还可以组合使用2种以上。另外,作为交联剂,可以列举例如具有选自异氰酸酯基、环氧丙基、羧基和噁唑啉基中的至少1种官能团的化合物、硅烷偶联剂等。这些交联剂既可以单独使用1种,还可以组合使用2种以上。
这些化学法表面处理既可以仅单独进行1种化学法表面处理,也可以组合进行2种以上的化学法表面处理。另外,这些化学法表面处理可以单独使用1种化合物进行,或者也可以组合使用2种以上的化合物进行。这些中,优选列举铬酸铬酸盐处理、更加优选列举组合铬酸化合物、磷酸化合物和上述氨基化酚聚合物的铬酸盐处理。
化学法表面处理中,关于在金属箔的表面所形成的耐酸性覆膜的量,没有特别限制,例如在组合铬酸化合物、磷酸化合物和上述氨基化酚聚合物进行铬酸盐处理的情况下,金属箔的表面每1m2,优选铬酸化合物以铬换算以约0.5~约50mg、优选为约1.0~约40mg、磷化合物以磷换算以约0.5~约50mg、优选为约1.0~约40mg和上述氨基化酚聚合物以约1~约200mg、优选为约5.0~150mg的比例含有。
化学法表面处理通过以下方法进行:将含有用于形成耐酸性覆膜的化合物的溶液通过棒涂法、辊涂法、凹版涂布法、浸渍法等涂布在金属箔的表面之后,进行加热使得金属箔的温度为70~200℃左右。另外,在对阻挡层2实施化学法表面处理之前,可以预先通过碱浸渍法、电解清洗法、酸清洗法、电解酸清洗法等对金属箔进行脱脂处理。通过这样进行脱脂处理,能够更高效地进行金属箔的表面的化学法表面处理。
[粘接层4]
在本发明的电池用包装材料中,粘接层4是为了使阻挡层2与密封层3牢固地粘接而根据需要设置在它们之间的层。
粘接层4由能够将阻挡层2与密封层3粘接的粘接用树脂组合物形成。粘接层4的形成中所使用的粘接剂成分只要能够将阻挡层2与密封层3粘接,则没有特别限制,既可以为2液固化型粘接剂,还可以为1液固化型粘接剂。此外,对于粘接层4的形成所使用的粘接剂成分的粘接机理,也没有特别限制,可以为化学反应型、溶剂挥发型、热熔融型、热压型等的任意一种,可以列举例如聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、聚萘二甲酸乙二醇酯、聚萘二甲酸丁二醇酯、聚间苯二甲酸乙二醇酯、聚碳酸酯、共聚聚酯等的聚酯系树脂;聚醚系粘接剂;聚氨酯系粘接剂;环氧系树脂;酚醛树脂系树脂;尼龙6、尼龙66、尼龙12、共聚聚酰胺等的聚酰胺系树脂;聚烯烃、羧酸改性聚烯烃、金属改性聚烯烃等的聚烯烃系树脂、聚乙酸乙烯酯系树脂;纤维素系粘接剂;(甲基)丙烯酸系树脂;聚酰亚胺系树脂;尿素树脂、三聚氰胺树脂等的氨基树脂;氯丁二烯橡胶、丁腈橡胶、苯乙烯-丁二烯橡胶等的橡胶;有机硅系树脂等。
在粘接层4的形成中,从在制造时不需要在高温条件下的老化、短时间使其固化实现前置时间的短缩化、将上述的刺破强度设定在上述的范围、进而将绝缘击穿电压设定为上述的值的观点出发,优选适合使用含有热固性树脂和固化促进剂的粘接层用树脂组合物。热固性树脂通过与固化促进剂并用,不需要高温条件下的老化,以短时间使其固化,能够缩短前置时间,也能够使成型性和绝缘性提高。
关于上述粘接层用树脂组合物所使用的热固性树脂的种类和优选的物质等,与上述[涂覆层1]的部分所记载的热固性树脂相同。另外,关于上述粘接层用树脂组合物所使用的固化促进剂的种类和优选的物质等,与上述[涂覆层1]的部分所记载的固化促进剂相同。关于上述粘接层用树脂组合物中的固化促进剂的含量,根据使用的热固性树脂的种类、固化促进剂的种类等适当设定,可以列举例如相对于热固性树脂100质量份,固化促进剂以总量计为0.01~6质量份、优选为0.05~5质量份、更优选为0.1~2质量份。
关于粘接层4的厚度,可以列举例如2~50μm、优选3~25μm。
[密封层3]
在本发明的电池用包装材料中,密封层3是对应于最内层、在组装电池时密封层彼此热熔接而将电池元件密封的层。
关于密封层3中使用的树脂成分,只要能够热熔接即可,没有特别限制,可以列举例如聚烯烃、环状聚烯烃、羧酸改性聚烯烃、羧酸改性环状聚烯烃。
作为上述聚烯烃,具体而言,可以列举:低密度聚乙烯、中密度聚乙烯、高密度聚乙烯、线性低密度聚乙烯等的聚乙烯;均聚丙烯、聚丙烯的嵌段共聚物(例如,丙烯与乙烯的嵌段共聚物)、聚丙烯的无规共聚物(例如,丙烯与乙烯的无规共聚物)等的结晶性或非晶性的聚丙烯;乙烯-丁烯-丙烯的三元共聚物;等。这些聚烯烃中,优选列举聚乙烯和聚丙烯。
上述环状聚烯烃为烯烃和环状单体的共聚物,作为上述环状聚烯烃的构成单体的烯烃,可以列举例如乙烯、丙烯、4-甲基-1-戊烯、苯乙烯、丁二烯、异戊二烯等。另外,作为上述环状聚烯烃的构成单体的环状单体,可以列举例如降冰片烯等的环状烯烃;具体而言,可以列举环戊二烯、二环戊二烯、环己二烯、降冰片二烯等的环状二烯等。这些聚烯烃中,优选列举环状烯烃、更优选为降冰片烯。
上述羧酸改性聚烯烃是指用羧酸将上述聚烯烃改性得到的聚合物。作为改性中使用的羧酸,可以列举例如马来酸、丙烯酸、衣康酸、巴豆酸、马来酸酐、衣康酸酐等。
上述羧酸改性环状聚烯烃是指将构成环状聚烯烃的单体的一部分替代为α,β-不饱和羧酸或其酸酐进行共聚、或者对环状聚烯烃嵌段共聚或接枝共聚α,β-不饱和羧酸或其酸酐得到的聚合物。关于要被羧酸改性的环状聚烯烃,与上述同样。另外,作为改性中所使用的羧酸,与上述酸改性环烯烃共聚物的改性中所使用的羧酸相同。
这些树脂成分之中,优选列举结晶性或非晶性的聚烯烃、环状聚烯烃以及这些的共混聚合物;更优选列举聚乙烯、聚丙烯、乙烯和降冰片烯的共聚物、以及这些中的2种以上的共混聚合物。
密封层3可以由1种树脂成分单独形成,或者也可以由组合2种以上树脂成分的共混聚合物形成。另外,密封层可以仅以1层形成,也可以通过相同或不同的树脂成分以2层以上形成。
另外,作为密封层3的厚度,没有特别限制,可以列举2~2000μm,优选列举5~1000μm,更优选列举10~500μm。
[电池用包装材料的厚度]
本发明的电池用包装材料由于在阻挡层2上没有设置粘接层和利用树脂膜的基材层,所以能够比以往的膜状的电池用包装材料更加薄膜化。为了具备能够将上述的刺破强度设定在上述的范围、进而能够将绝缘击穿电压设定为上述的值的程度的厚膜,本发明的电池用包装材料全体的厚度,可以列举例如40~120μm左右、优选列举50~100μm左右。
3.电池用包装材料的制造方法
关于本发明的电池用包装材料的制造方法,只要能够得到将规定组成的各层叠层得到的叠层体即可,没有特别限制,可以例示例如包括以下的工序的方法:
在阻挡层之上涂布包含热固性树脂和固化促进剂的树脂组合物,加热使其固化的涂覆层形成工序;
在上述涂覆层形成工序之前或之后,在阻挡层的叠层涂覆层的面的相反侧的面叠层密封层的工序。
在涂覆层1为单层的情况下,上述的涂覆层形成工序进行1次即可,在多层的情况下,进行多次即可。
上述涂覆层形成工序中的在阻挡层2上形成涂覆层的树脂组合物的涂布,能够利用凹版涂布法、辊涂法等的涂布方法进行。另外,作为使涂布在阻挡层2上的树脂组合物固化时的加热条件,可以列举例如90~200℃、优选为100~190℃,并且为0.1~60秒钟、优选为1~30秒钟。
这样,在本发明中,在涂覆层形成工序中不需要高温条件下的老化,能够仅以上述加热条件使润滑性涂覆层1充分固化,因此能够大幅缩短前置时间。
另外,在阻挡层2上直接叠层密封层3的情况下,在阻挡层2上通过凹版涂布法、辊涂法等方法涂布构成密封层3的树脂成分即可。另外,在阻挡层2与密封层3之间设置粘接层4的情况下,可以列举例如:(1)在阻挡层2上通过将粘接层4和密封层3共挤出来叠层的方法(共挤出层压法);(2)单独形成叠层有粘接层4和密封层3的叠层体,将其在阻挡层2上通过热层压法叠层的方法;(3)在阻挡层2上将用于形成粘接层4的粘接剂通过挤出法或溶液涂敷并在高温下干燥,进而烧制的方法等叠层,在该粘接层4上通过热层压法叠层预先以片状制膜的密封层3的方法;(4)边使熔融的粘接层4流入到阻挡层2与预先以片状制膜的密封层3之间、边经由粘接层4贴合叠层体A与密封层3的方法(夹层层压法)等。
如上所述操作,形成包括单层或多层结构的涂覆层1/根据需要对表面进行了化学法表面处理的阻挡层2/根据需要设置的粘接层4/密封层3的叠层体。
在本发明的电池用包装材料中,根据需要为了使制膜性、叠层化加工、最终制品2次加工(包装化、压花成型)适应性等提高或稳定化,可以对构成叠层体的各层实施电晕放电处理、喷砂处理、氧化处理、臭氧处理等的表面活性化处理。
4.电池用包装材料的用途
本发明的电池用包装材料作为用于密封并收纳正极、负极、电解质等的电池元件的包装材料,成型为所希望的形状而使用。
具体而言,将至少具备正极、负极和电解质的电池元件,以与上述正极和负极分别连接的金属端子向外侧突出的状态,以能够在电池元件的边缘形成凸缘部(密封层3彼此接触的区域)的方式,用本发明的电池用包装材料进行包覆,将上述凸缘部的密封层3彼此热封,进行密封,由此提供使用了电池用包装材料的电池。此外,使用本发明的电池用包装材料收纳电池元件时,以本发明的电池用包装材料的密封部分成为内侧(与电池元件接触的面)的方式使用。
如上所述,本发明的电池用包装材料的叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,且涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上,由此具备优异的成型性和绝缘性。因此,有效地抑制由成型造成的针孔的发生等,因此能够适合用作用于收纳电池元件的包装材料。另外,通过涂覆层的绝缘击穿电压为1.0以上,有效地提高作为电池用包装材料的绝缘性,从而能够适合用作组件化使用的电池所使用的包装材料。
本发明的电池用包装材料可以用于一次电池、二次电池的任一种,优选为二次电池。关于适用本发明的电池用包装材料的二次电池的种类,没有特别限制,可以列举例如锂离子电池、锂离子聚合物电池、铅蓄电池、镍·氢蓄电池、镍·镉蓄电池、镍·铁蓄电池、镍·锌蓄电池、氧化银·锌蓄电池、金属空气电池、多价阳离子电池、电容器(condenser)、电容器(capacitor)等。这些二次电池之中,作为本发明的电池用包装材料的适合的应用对象,可以列举锂离子电池和锂离子聚合物电池。
实施例
以下,例示实施例和比较例,详细说明本发明。但是,本发明不限定于实施例。
[电池用包装材料的制造]
在包括对两面实施了化学法表面处理的铝箔(厚度40μm)的阻挡层上以成为表1和表2所示的厚度的方式形成涂覆层。具体而言,在阻挡层涂布表1和表2所示的热固性树脂组合物并使其固化,从而在阻挡层上叠层涂覆层。在该电池用包装材料的制造中,能够在160℃、30秒钟的极短时间内,使该涂覆层固化,实现了前置时间的大幅短缩。此外,构成涂覆层的树脂组合物的详细情况如下所述。作为阻挡层使用的铝箔的化学法表面处理如下进行:将包含酚醛树脂、氟化铬化合物和磷酸的处理液以铬的涂布量成为10mg/m2(干燥重量)的方式,通过辊涂法涂布在铝箔的两面,以覆膜温度为180℃以上的条件烧制20秒钟。然后,通过在阻挡层的没有叠层涂覆层的一侧,将羧酸改性聚丙烯(配置在阻挡层侧、厚度23μm)和均聚丙烯(最内层、厚度23μm)进行共挤出,由此在阻挡层上叠层由2层构成的密封层。这样,得到包括依次叠层有涂覆层/阻挡层/密封层的叠层体的电池用包装材料。
(形成涂覆层的表1和表2所示的树脂组合物)
<聚氨酯树脂>
·热固性树脂100质量份
(主剂:羟值低于40的聚氨酯多元醇、固化剂:二苯基甲烷二异氰酸酯加合物)
·固化促进剂1质量份
(在80~150℃促进热固性树脂的交联反应的咪唑化合物)
<环氧树脂>
·热固性树脂100质量份
(主剂:线型酚醛清漆型环氧树脂、固化剂:甲基六氢苯二甲酸酐)
·固化促进剂1质量份
(1,8-二氮杂双环[5.4.0]十一碳-7烯)
<热固性丙烯酸树脂>
·热固性树脂100质量份
(主剂:甲基丙烯酸酯共聚物、固化剂:二苯基甲烷二异氰酸酯加合物)
·固化促进剂1质量份
(1,5-二氮杂双环[4.3.0]壬-5-烯)
<聚酰亚胺树脂>
·热固性树脂100质量份
(主剂:以3,3'-二氨基二苯甲酮、3,4'-二氨基二苯甲酮为单体的聚酰亚胺树脂、固化剂:甲基六氢苯二甲酸酐)
·固化促进剂1质量份
(在80~150℃促进热固性树脂的交联反应的咪唑化合物)
[刺破强度的测定]
对于上述得到的电池用包装材料,分别利用根据JIS 1707:1997的规定的方法,测定刺破强度。此外,刺破强度通过将针从涂覆层侧插刺来测定。结果表示在表1和表2中。
[绝缘击穿电压的测定]
对于上述得到的电池用包装材料,分别根据JIS C2110-1的规定测定涂覆层的绝缘击穿电压(交流、50Hz)。测定条件的详细情况如下所述。结果表示在表1和表2中。
(试验条件)
升压方式;短时间法
周围介质;大气(23℃)
升压速度;0.3kV/s
试验电极;圆柱/圆柱
测定数;n=3
试验环境;23℃±2℃、50±5%RH
[成型性的评价]
将上述得到的电池用包装材料裁断,制作120×80mm的长条片,将其作为试验样品。使用包括30×50mm的矩形状的阳模和与该阳模的间隙为0.5mm的阴模的直模,以热粘接性树脂层侧位于阳模侧的方式,在阴模上载置上述试验样品,将成型深度设定为3.5~5.5mm用0.1MPa的按压压力(面压)按压上述试验样品,进行冷轧成型(牵引1段成型)。确认成型得到的各试验样品中的金属层的针孔和裂纹发生的有无,计算出针孔和裂纹的发生率(%)。关于针孔和裂纹的发生率,将在进行了上述成型后在至少一个部分确认到针孔或裂纹的样品判断为成型不良品,求出100个试验样品以上述条件成型时发生的成型不良品的比例,将成型不良品的比例低于5%的情况判断为合格,将成型不良品的比例为5%以上的情况判断为不合格。通过按照下述基准将所得到的判定结果进行分类,从而进行成型性的评价。将结果表示在表1和表2。此外,如果以下述基准为D以上,则从实用的观点来看是没有问题的品质。
(成型性的评价基准)
A:成型深度5.5mm时合格
B:成型深度5.5mm时不合格、成型深度5.0mm时合格
C:成型深度5.0mm时不合格、成型深度4.5mm时合格
D:成型深度4.5mm时不合格、成型深度4.0mm时合格
E:成型深度4.0mm时不合格、成型深度3.5mm时合格
F:成型深度3.5mm时不合格
[表1]
[表2]
[评价结果]
由表1和表2所示的结果可知,叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上的实施例1~36的电池用包装材料中,成型性优异。另一方面,在对应于刺破强度低于5N或绝缘击穿电压为1.0kV的任何一种情况的比较例1~20中,成型性差。
符号说明
1 涂覆层
1a 第一涂覆层
1b 第二涂覆层
1c 第三涂覆层
2 阻挡层
3 密封层
Claims (12)
1.一种电池用包装材料,其特征在于:
其为至少依次具有涂覆层、阻挡层和密封层的叠层体,
所述涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,
所述叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,
所述涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。
2.如权利要求1所述的电池用包装材料,其特征在于:
所述涂覆层为从最外表面侧到阻挡层侧依次配置有第一涂覆层、第二涂覆层和第三涂覆层的3层结构。
3.如权利要求1或2所述的电池用包装材料,其特征在于:
所述涂覆层的至少1个层的形成所使用的所述树脂组合物包含颜料和/或染料。
4.如权利要求3所述的电池用包装材料,其特征在于:
所述涂覆层的至少1个层的形成所使用的所述树脂组合物包含无机颜料。
5.如权利要求1~4中任一项所述的电池用包装材料,其特征在于:
所述热固性树脂为选自环氧树脂、氨基树脂、丙烯酸树脂、聚氨酯树脂、酚醛树脂、不饱和聚酯树脂、聚酰亚胺树脂和醇酸树脂中的至少1种。
6.如权利要求1~5中任一项所述的电池用包装材料,其特征在于:
所述固化促进剂为选自脒化合物、碳化二亚胺化合物、酮亚胺化合物、肼化合物、锍盐、苯并噻唑鎓盐和叔胺化合物中的至少1种。
7.如权利要求1~6中任一项所述的电池用包装材料,其特征在于:
所述阻挡层为金属箔。
8.如权利要求1~7中任一项所述的电池用包装材料,其特征在于:
电池用包装材料全体的厚度为40~120μm。
9.一种电池用包装材料的制造方法,其用于制造权利要求1~8中任一项所述的电池用包装材料,该制造方法的特征在于,包括:
在阻挡层之上涂布包含热固性树脂和固化促进剂的树脂组合物,加热使其固化的涂覆层形成工序;和
在所述涂覆层形成工序之前或之后,在阻挡层的叠层涂覆层的面的相反侧的面叠层密封层的工序。
10.一种电池,其特征在于:
至少具备正极、负极和电解质的电池元件收纳在权利要求1~8中任一项所述的电池用包装材料内。
11.一种电池的制造方法,其特征在于:
包括用电池用包装材料收纳至少具备正极、负极和电解质的电池元件的工序,
所述电池用包装材料为至少依次具有涂覆层、阻挡层和密封层的叠层体,
所述涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,
所述叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,
所述涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。
12.一种叠层体作为电池用包装材料的使用,其特征在于:
该叠层体为至少依次具有涂覆层、阻挡层和密封层的叠层体,
所述涂覆层具有由包含热固性树脂和固化促进剂的树脂组合物的固化物形成的单层或多层结构,
所述叠层体的根据JIS 1707:1997的规定所测定的刺破强度为5N以上,
所述涂覆层的根据JIS C2110-1的规定所测定的绝缘击穿电压为1.0kV以上。
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CN108794788A (zh) * | 2018-05-16 | 2018-11-13 | 上海恩捷新材料科技股份有限公司 | 一种软包装及其制备方法 |
US20220084721A1 (en) * | 2019-01-16 | 2022-03-17 | Autonetworks Technologies, Ltd. | Insulated wire with bonding layer |
CN112406231A (zh) * | 2020-10-30 | 2021-02-26 | 苏州福斯特光伏材料有限公司 | 一种新型锂电池包装材料 |
Also Published As
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JPWO2016052394A1 (ja) | 2017-04-27 |
WO2016052394A1 (ja) | 2016-04-07 |
JP6020778B2 (ja) | 2016-11-02 |
JP2017022135A (ja) | 2017-01-26 |
CN107078237B (zh) | 2020-12-01 |
US11024832B2 (en) | 2021-06-01 |
US20170229685A1 (en) | 2017-08-10 |
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