CN111376562B - 一种高阻隔性锂电池用包装膜 - Google Patents
一种高阻隔性锂电池用包装膜 Download PDFInfo
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- 239000012785 packaging film Substances 0.000 title claims abstract description 33
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 24
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 18
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- 239000001301 oxygen Substances 0.000 abstract description 7
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical class C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 20
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 3
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Abstract
本发明涉及电池包装膜技术领域,尤其是一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EAA或EMAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,所述热封层采用聚氨酯改性环氧树脂;本发明中通过在尼龙层的外表面设置有一层涂覆有SiOX涂层的BOPP薄膜层,并且采用明胶作为第一粘合层,可以进一步提高包装膜的外界阻氧性,而且BOPP薄膜还能进一步提高尼龙层的阻水性,所以,本发明中的锂电池用包装膜具有较高的阻隔性,使用寿命长。
Description
技术领域
本发明涉及电池包装膜技术领域,尤其是一种高阻隔性锂电池用包装膜。
背景技术
现有的锂电池用软包装膜,虽然存在质轻、安全性高、制备和包装工艺简单等优点,但是还是存在长期使用后,包装膜的各层之间容易发生剥离脱层现象,在冷冲压过程中铝箔层容易受力形成裂缝,对水汽以及酸液的阻隔效果还有待提高,各层之间的粘结层容易受到腐蚀,影响包装膜的使用寿命。
发明内容
本发明的目的是:克服现有技术中不足,提供一种阻隔性高、使用寿命长的高阻隔性锂电池用包装膜。
为解决上述技术问题,本发明采用的技术方案如下:
一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EAA或EMAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,所述热封层采用聚氨酯改性环氧树脂。
进一步的,所述SiOX涂层的厚度为200-300nm,所述SiOX涂层采用电子枪蒸发涂布法。
进一步的,所述BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层。
进一步的,所述压花层采用同心圆形、菱形或波浪形或斜条纹形。
进一步的,所述加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层。
进一步的,所述天然蒙脱土层的厚度为1-2μm,所述第一凝胶层和第二凝胶层的厚度为1-2μm。
进一步的,所述铝箔层的厚度为80-100μm。
进一步的,所述尼龙层的厚度为20-30μm。
进一步的,所述耐腐蚀层的厚度为100-200nm。
采用本发明的技术方案的有益效果是:
本发明中通过在尼龙层的外表面设置有一层涂覆有SiOX涂层的BOPP薄膜层,可以极大的提高尼龙层的氧气阻隔率,第一粘合层采用明胶,明胶中含有大量的氨基和羟基,能形成强有力的氢键,其次,明胶还具有高度的分子取向,可以进一步提高包装膜的外界阻氧性,而且BOPP薄膜还能进一步提高尼龙层的阻水性,所以,本发明中的锂电池用包装膜具有较高的阻隔性,使用寿命长。
本发明中的加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,采用此结构,一方面,提高了包装膜的强度,另一方面,天然蒙脱土可以提高包装膜对非极性气体和液体的阻隔能力,从而提高了包装膜的内在阻隔性,提高了包装膜的耐腐蚀性,进一步延长了包装膜的使用寿命。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合具体实施方式对本发明作进一步详细的说明。
一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EAA或EMAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,所述热封层采用聚氨酯改性环氧树脂。本发明中通过在尼龙层的外表面设置有一层涂覆有SiOX涂层的BOPP薄膜层,可以极大的提高尼龙层的氧气阻隔率,第一粘合层采用明胶,明胶中含有大量的氨基和羟基,能形成强有力的氢键,其次,明胶还具有高度的分子取向,可以进一步提高包装膜的外界阻氧性,而且BOPP薄膜还能进一步提高尼龙层的阻水性,所以,本发明中的锂电池用包装膜具有较高的阻隔性,使用寿命长。
作为一个优选实施方式,本实施例中SiOX涂层的厚度为200-300nm,所述SiOX涂层采用电子枪蒸发涂布法。
作为一个优选实施方式,本实施例中BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层,压花层的结构设计,提高了BOPP薄膜层与尼龙层之间的粘结稳定性,可以有效降低长期使用后包装膜的各层之间发生剥离脱层。
作为一个优选实施方式,本实施例中压花层采用同心圆形、菱形或波浪形或斜条纹形。
作为一个优选实施方式,本实施例中加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,采用此结构,一方面,提高了包装膜的强度,另一方面,天然蒙脱土可以提高包装膜对非极性气体和液体的阻隔能力,从而提高了包装膜的内在阻隔性,提高了包装膜的耐腐蚀性,进一步延长了包装膜的使用寿命。
作为一个优选实施方式,本实施例中天然蒙脱土层的厚度为1-2μm,所述第一凝胶层和第二凝胶层的厚度为1-2μm。
作为一个优选实施方式,本实施例中铝箔层的厚度为80-100μm。
作为一个优选实施方式,本实施例中尼龙层的厚度为20-30μm。
作为一个优选实施方式,本实施例中耐腐蚀层的厚度为100-200nm。
实施例1
一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,尼龙层的厚度为20μm,SiOX涂层的厚度为200nm,所述SiOX涂层采用电子枪蒸发涂布法,BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层,压花层采用同心圆形,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,铝箔层的厚度为80μm,耐腐蚀层的厚度为100nm,加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,天然蒙脱土层的厚度为1μm,所述第一凝胶层和第二凝胶层的厚度为1μm所述热封层采用聚氨酯改性环氧树脂。
实施例2
一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,尼龙层的厚度为22μm,SiOX涂层的厚度为220nm,所述SiOX涂层采用电子枪蒸发涂布法,BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层,压花层采用同心圆形,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,铝箔层的厚度为85μm,耐腐蚀层的厚度为120nm,加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,天然蒙脱土层的厚度为1.5μm,所述第一凝胶层和第二凝胶层的厚度为1.2μm所述热封层采用聚氨酯改性环氧树脂。
实施例3
一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,尼龙层的厚度为25μm,SiOX涂层的厚度为250nm,所述SiOX涂层采用电子枪蒸发涂布法,BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层,压花层采用菱形,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EMAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,铝箔层的厚度为90μm,耐腐蚀层的厚度为160nm,加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,天然蒙脱土层的厚度为1.6μm,所述第一凝胶层和第二凝胶层的厚度为1.6μm所述热封层采用聚氨酯改性环氧树脂。
实施例4
一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,尼龙层的厚度为28μm,SiOX涂层的厚度为280nm,所述SiOX涂层采用电子枪蒸发涂布法,BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层,压花层采用波浪形,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EMAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,铝箔层的厚度为90μm,耐腐蚀层的厚度为180nm,加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,天然蒙脱土层的厚度为1.8μm,所述第一凝胶层和第二凝胶层的厚度为1.8μm所述热封层采用聚氨酯改性环氧树脂。
实施例5
一种高阻隔性锂电池用包装膜,包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,尼龙层的厚度为30μm,SiOX涂层的厚度为300nm,所述SiOX涂层采用电子枪蒸发涂布法,BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层,压花层采用斜条纹形,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EMAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,铝箔层的厚度为100μm,耐腐蚀层的厚度为200nm,加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,天然蒙脱土层的厚度为2μm,所述第一凝胶层和第二凝胶层的厚度为2μm所述热封层采用聚氨酯改性环氧树脂。
本发明中通过在尼龙层的外表面设置有一层涂覆有SiOX涂层的BOPP薄膜层,可以极大的提高尼龙层的氧气阻隔率,第一粘合层采用明胶,明胶中含有大量的氨基和羟基,能形成强有力的氢键,其次,明胶还具有高度的分子取向,可以进一步提高包装膜的外界阻氧性,而且BOPP薄膜还能进一步提高尼龙层的阻水性,所以,本发明中的锂电池用包装膜具有较高的阻隔性,使用寿命长。
本发明中的加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层,采用此结构,一方面,提高了包装膜的强度,另一方面,天然蒙脱土可以提高包装膜对非极性气体和液体的阻隔能力,从而提高了包装膜的内在阻隔性,提高了包装膜的耐腐蚀性,进一步延长了包装膜的使用寿命。
以上述依据本发明的理想实施例为启示,通过上述的说明内容,相关工作人员完全可以在不偏离本项发明技术思想的范围内,进行多样的变更以及修改。凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。本项发明的技术性范围并不局限于说明书上的内容,必须要根据权利要求范围来确定其技术性范围。
Claims (7)
1.一种高阻隔性锂电池用包装膜,其特征在于:包括依次层叠设置的尼龙层、第一粘合层、铝箔层、第二粘合层、加强层、第三粘合层和热封层,所述尼龙层的外表面上有一层表面涂覆有SiOX涂层的BOPP薄膜层,所述第一粘合层为明胶层,所述第二粘合层和第三粘合层采用EAA或EMAA,所述铝箔层与第一粘合层的接触面上涂覆有一层耐腐蚀层,所述热封层采用聚氨酯改性环氧树脂;
所述SiOX涂层的厚度为200-300nm,所述SiOX涂层采用电子枪蒸发涂布法;
所述加强层包括第一凝胶层和第二凝胶层,第一凝胶层和第二凝胶层之间设置有一层碳纤维层,所述第二凝胶层与碳纤维层之间填充有天然蒙脱土层。
2.根据权利要求1所述的一种高阻隔性锂电池用包装膜,其特征在于:所述BOPP薄膜层与尼龙层之间通过粘合剂连接,所述BOPP薄膜层与尼龙层的接触面上有压花层。
3.根据权利要求2所述的一种高阻隔性锂电池用包装膜,其特征在于:所述压花层采用同心圆形、菱形或波浪形或斜条纹形。
4.根据权利要求1所述的一种高阻隔性锂电池用包装膜,其特征在于:所述天然蒙脱土层的厚度为1-2μm,所述第一凝胶层和第二凝胶层的厚度为1-2μm。
5.根据权利要求1所述的一种高阻隔性锂电池用包装膜,其特征在于:所述铝箔层的厚度为80-100μm。
6.根据权利要求1所述的一种高阻隔性锂电池用包装膜,其特征在于:所述尼龙层的厚度为20-30μm。
7.根据权利要求1所述的一种高阻隔性锂电池用包装膜,其特征在于:所述耐腐蚀层的厚度为100-200nm。
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