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1、条缝挤压涂在条缝挤压涂在LIB隔膜改性涂层隔膜改性涂层 涂布应用研究进展涂布应用研究进展 Advance in Research on Application of slot coating in LIB separator modify layer coating 博源涂布科技有限公司博源涂布科技有限公司 赵伯元赵伯元 目录目录 content 1 薄层涂布方法的比较 薄层涂布方法的比较 compare the thinner layer coating methods 2 凹版涂布 凹版涂布 Gravure roller coating 3 条逢挤压涂布 条逢挤压涂布 Slot coati
2、ng 4 挤压嘴内部腔体流动的分析和设挤压嘴内部腔体流动的分析和设 flow analysis and design of internal coating die cavities 5 涂布嘴的结构对涂布均匀度的影响涂布嘴的结构对涂布均匀度的影响 Effect of the coating die structure on the coating uniformity 6 条逢挤压涂布在隔膜涂布中的应用 条逢挤压涂布在隔膜涂布中的应用 Application of slot coating in LIB separator coating 1 薄层涂布薄层涂布 thinner layer c
3、oating 比较和选择比较和选择 Comparing and choosing 1 1 薄层涂布方法薄层涂布方法 thinner coating mathod 1 2 薄层涂布方法的总结薄层涂布方法的总结 summary 0f some coating mathods 涂布方法涂布方法 process 粘度粘度 Pa s 湿厚度湿厚度 m 涂层误差涂层误差 Coating accuracy 比较性能比较性能 Compare capability 绕线刮棒涂布绕线刮棒涂布 wire wound rod 0 02 1 5 50 10 nonuniformity 逆转辊涂布逆转辊涂布 Revers
4、e roll 0 01 50 5 400 5 较均匀性较均匀性 Less uniformity 凹版辊涂布凹版辊涂布 Gravure 0 001 5 1 25 2 凹版辊磨损凹版辊磨损 Wear of the gravure roller 坡流挤压涂布坡流挤压涂布 slide 0 005 0 5 15 250 2 较厚最小湿厚度厚较厚最小湿厚度厚 Thicker wet thickness 条逢挤压涂布条逢挤压涂布 slot 0 005 20 2 250 2 涂层薄 精度高涂层薄 精度高 Thinner wet thickness 1 3 坡流挤压涂布特点坡流挤压涂布特点 feature of
5、 slide coating 在胶片涂布中广泛应用在胶片涂布中广泛应用 Widely use in photo film coating 最小湿涂布量 最小湿涂布量 50ml m2 minimum coating minimum coating volume volume 50ml m2 涂布速度 涂布速度 10m min Coating speed 10m min 涂布精度 涂布精度 2 Accuracy 2 1 4 条逢挤压涂布特点条逢挤压涂布特点 feature of slot coating 适用流体粘度范围广适用流体粘度范围广 Apply in wide viscosity rang
6、e 涂布薄层涂布薄层 thinner coating layer 涂布精度高涂布精度高 Higher coating accuracy 涂布速度高涂布速度高 Higher coating speed 2 凹版涂布凹版涂布 Gravure coating 2 1 凹版辊涂布过程凹版辊涂布过程 gravure coating process 经过定厚刮刀刮除表面液体 经过定厚刮刀刮除表面液体 在凹版辊上凹槽内的液体 被在凹版辊上凹槽内的液体 被 转移到在包胶背辊上运行的片转移到在包胶背辊上运行的片 幅上幅上 The gravure roll has indentation that hold th
7、e liquid after the surface is wiped of by a doctor blade the liquid is then transferred to the web moving on a rubber covered backup roll 2 2 凹版辊涂布厚度的控制 adjustment of the coating thickness of gravure coating 凹版涂布厚度由凹槽的容积控制凹版涂布厚度由凹槽的容积控制 The coating thickness controlled by the cell volume 少量改变涂层厚度 就需
8、要更换选用不同容积的凹版辊少量改变涂层厚度 就需要更换选用不同容积的凹版辊 Changing coating thickness more than a small amount requires changing gravure roller which with different cell volume 2 3 凹版辊涂布绕性刮刀定厚实验数据凹版辊涂布绕性刮刀定厚实验数据 experimental measurements of excess coating thickness on three different gravure roller 涂层厚度是和刮刀负载和涂层厚度是和刮刀负载
9、和1刮刀弹性模数的函数刮刀弹性模数的函数 excess coating thickness is a function of the blade loading and elasticity number 2 5 隔膜凹板辊涂布过程存在的几个问题隔膜凹板辊涂布过程存在的几个问题 some problem occur in separator gravure roller coating process 隔膜涂布过程中 由于高硬度氧化铝颗粒作用 网纹辊磨隔膜涂布过程中 由于高硬度氧化铝颗粒作用 网纹辊磨 损快损快 because of the effect of the hard Al2O3 g
10、rain occur rapid wear of the gravure roller 涂布过程中涂层厚度逐渐变薄涂布过程中涂层厚度逐渐变薄 Coating thickness decrease gradually in coating process 为保持涂布厚度 需要定时更换新凹版辊为保持涂布厚度 需要定时更换新凹版辊 To keep coating thickness require to period change the new gravure roller 3 条逢挤压涂布条逢挤压涂布 Slot coating process 3 1 条逢挤压涂布的比较中优势条逢挤压涂布的比较中
11、优势 comparative advantage of slot coating 1 可以实现薄层涂布可以实现薄层涂布 To achieve thinner layer coating 2 可以实现高精度涂布可以实现高精度涂布 To achieve more coating accuracy 3 涂布过程无磨损 涂布过程无磨损 There is no wear in coating process 4 运行成本低运行成本低 Lower running costs 3 2 预定量挤压嘴涂布两种涂布方式预定量挤压嘴涂布两种涂布方式 Two coating process of premetered
12、 die coating 1 条逢挤压涂布 左 条逢挤压涂布 左 两个唇板都被涂布液湿润两个唇板都被涂布液湿润 在隔膜涂在隔膜涂 布采用的涂布方式布采用的涂布方式 Slot coating process left coating liquid wets both lip of the coating die applied to separator coating 2 挤出式挤压涂布 右 涂布液从条挤出式挤压涂布 右 涂布液从条 逢挤出成带状 不润湿两个唇板 逢挤出成带状 不润湿两个唇板 extrusion coating process right Coating liquid exits
13、 the slot as ribbon does not wet the lips of the die 3 3 条逢挤压涂布过程条逢挤压涂布过程 slot coating process 计量泵按照设定的流量向挤压涂 布嘴腔体内输送涂布液 流体在 腔体一侧的扁平通道到出口处形 成薄的液膜涂覆到支持体上 形 成均匀的涂层 涂层的厚度通过 调节计量泵的流量 metering pump flow rate Metering pump premeter supply liquid to die cavity flow to the slot form thin layer in the exit c
14、oated on the web The film thickness depend on the 3 4 条逢挤压涂布窗口和流动不稳定性条逢挤压涂布窗口和流动不稳定性 coating window and flow instability of slot coating process 从图中间区流动稳定 能从图中间区流动稳定 能 进行无弊病涂布的三角形进行无弊病涂布的三角形 区域为涂布窗口区域为涂布窗口 The triangle area coating flow stability free defects coating call coating window 窗口边界条件外会出现流窗
15、口边界条件外会出现流 动不稳定性的弊病动不稳定性的弊病 Outside of the window boundary appear flow instability defect 3 5 涂布间隙对最小涂布湿厚极限的影响涂布间隙对最小涂布湿厚极限的影响 effect of coating gap in slot coating on minimum wet thickness 在相同的涂布速度 条件下 较小的涂布 间隙能获得较薄的涂 层 In the same coating speed the small coating gap the thinner of the coating thic
16、kness 3 6 粘度对条逢涂布最小湿厚度的影响粘度对条逢涂布最小湿厚度的影响 effect of the liquid viscosity in slot coating on the minimum wet thickness 上 涂布间隙上 涂布间隙1000um upper coating gap 1000um 下 涂布间隙下 涂布间隙200um Lower coating gap 200um 结论 结论 在较小的涂布间隙 较小粘度在较小的涂布间隙 较小粘度 流体 可获得最薄的涂布涂流体 可获得最薄的涂布涂 层层 Conclusion the small coating and liquid viscosity the thinner coating thickness 3 7 毛细准数的定义毛细准数的定义 definition of capillary number Ca 毛细准数 capillary number Ca v 式中 where 涂布流体粘度 liquid viscosity mPa s V 涂布速度 coating speed m s 流体表面张力 liqui
