标题: 多层膜共挤出制程的层厚均匀性改善及奈米多层膜的开发
Improving the Layer Thickness Uniformity in Multilayer Film Co-Extrusion and the Development of Nano-Multilayer Films
作者: 陈仁浩
CHEN REN HAW
国立交通大学机械工程学系(所)
关键字: 多层膜;共挤出;层厚均匀性;multilayer film;co-extrusion;uniformity of layer thickness
公开日期: 2012
摘要: 多层膜各层的厚度均匀性是多层膜共挤出制程的重要加工特性之一,其对于多层膜产品的性能 和品质有重要的影响。本计画拟探讨多层膜各层的厚度均匀性对于共挤出制程参数、模具条件以及 熔胶性质等的关联度和依存特性,以发展能改善层厚均匀性的技术措施,并且藉由开发奈米多层膜 来做为技术提升的载具和验证指标。计画时程共两年,兹分年叙述如下。

第一年:首先进行PC/PMMA/PC三层膜共挤出实验,利用高速相机摄录熔胶在模具内合流后的 层间界面位置和平稳性的变化,并与模口流出并冷却后的多层膜之各层厚度分布进行比较分析。其 次利用有限元素软体POLYFLOW,并选用黏弹性模型的White-Metzner模型,进行合流部以及合流 部下游至模唇的非等温三维流动分析。最后进行实验结果与数值模拟结果的综合比较和检讨,以了 解共挤出多层膜的各层厚度分布对于诸影响因子的依存特性,并研拟改善层厚均匀性的策略。

第二年:首先依据第一年度研究所拟定的策略,实施必要的模具修正和材料性质调整,并以类 似第一年度的手法进行新阶段的共挤出实验和数值模拟分析,以发展改善层厚均匀性的软硬体技 术。其次应用前阶段所得的知识技术,配合使用多重的模流分割再叠合的方法,进行奈米多层膜的 开发,以验证本计画所发展的技术之有效性和品质。
The uniformity of layer thickness in multilayered films is one of the important processing characteristics of the multilayer film co-extrusion process and an important property and quality factor of multilayered film products. This study examines the correlation and dependence of the uniformity of layer thickness in multilayered films regarding the co-extrusion process parameters, die conditions, and properties of polymer melts to develop technical measures to improve the uniformity of layer thickness. This study develops nano-multilayer films as a vehicle for technology improvements and a verification indicator. This study is set to be conducted over two years; the detailed study schedule is provided below.

During the first year: First, the co-extrusion experiment of the PC/PMMA/PC three-layer film will be performed. The layered interface location of the polymer melts in the die at the confluence and the change of stability will be recorded using a high-speed camera, and then compared to the distribution of layer thickness of the multilayer films that are released from the die outlet and cooled. Additionally, the finite element analysis software POLYFLOW with the viscoelastic White-Metzner model will be employed to analyze the non-isothermal three-dimensional flow of confluence and downstream confluence to the die lip. Finally, the results of the experiment and numerical simulation will be compared and analyzed to understand the dependent properties of the distribution of layer thickness in co-extrusion multilayer films regarding different influential factors, and strategies for improving the uniformity of layer thickness will be developed.

During the second year: First, the strategies developed during the first year will be used in to adjust the die and material properties. Using a similar approach to the one employed in the first year, the co-extrusion experiment and numerical analysis will be performed to develop software/hardware technology to improve the uniformity of layer thickness. Additionally, by combining the knowledge obtained during this study and the developed method of dividing and superimposing multiple material flow to develop nano-multilayer films, we can validate the effectiveness and quality of the technology developed during this study.
官方说明文件#: NSC101-2221-E009-020
URI: http://hdl.handle.net/11536/98325
https://www.grb.gov.tw/search/planDetail?id=2598664&docId=393767
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