低吸濕及低翹曲之面板透明複合材研究

Low moisture absorption and low warpage characteristic of transparent panel composite materials research

陳忠煜(Chung-Yu Chen)

指導教授 ： 芮祥鵬

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00892

摘要

隨著科技時代的進步，人們早已將追求輕、薄、短、小做為主要需求並應用於可攜式電子產品設計。因此，採用塑膠材料做為顯示器基板並用以取代傳統玻璃材質的產品工藝，儼然已經成為此技術發展的必然趨勢。然而，以塑膠材料作為製作基板元件時，則會因塑膠基板的尺寸安定性容易受到外在環境因子(溫度和濕度)影響而產生變化的因素，導致塑膠基板在使用上受到限制。舉例塑膠基板的熱收縮率、線膨脹係數、吸濕膨脹係數皆比玻璃材質大。玻璃的線膨脹係數為8*10-6m/mK，幾乎達可忽略的狀態；而常作為面板元件材質的PMMA材料，其線膨脹係數為85*10-6m/mK，故其受環境水氣及熱的影響就更為顯著，因此若僅採單一PMMA基板材料是無法改善此尺寸安定性不佳的缺點。
此篇研究，採用參種塑膠材料並以多層共押合製程的製板方式來進行複合材料的試驗，檢測項目皆比照當前業界對於塑膠面板檢測的標準，如光學特性、表面鉛筆硬度、落球試驗、吸濕性、熱收縮性等。經實驗驗證，此複合材料具有低吸濕性、低翹曲性且透光率可達到與PMMA基板相近，且此複合材料亦具有可撓性及耐衝擊特性，更是較玻璃基板材料更佳，故可作為玻璃的取代建議材質。

關鍵字

甲基丙烯酸甲酯苯乙烯MS ； 苯乙烯 ； 甲基丙烯酸甲酯 ； 多層共押出技術

並列摘要

With the progress of science and technology, People have already to pursuit of light, thin, short, small requirement and applied to portable electronic products design. Therefore, the using of plastic material to replace the traditional glass products which used as a display substrate seems to have become an inevitable trend of development of this technology. However, when the production of plastic materials as the substrate components, size stability is due to the plastic substrate susceptible from external environmental factors (such as temperature and humidity ), that change arising from factors and resulting in restrictions on using of plastic substrates. For examples of the heat shrinkage rate, coefficient of linear expansion and coefficient of moisture expansion of the plastic substrate are larger than the glass. The Linear expansion coefficient of the glass is 8 * 10-6m/mK, almost negligible state; now be known the panel element is often used as the material of PMMA material having a linear expansion coefficient of 85 * 10-6m/mK, consequently the humidity and heat by the environment impact is even more remarkable, so if only using a PMMA substrate material is unable to improve this poor size stability shortcomings.
The research, using two types of plastic materials and multi-layer extrusions lamination process system make the plates. Testing of this composite materials plate, the test items were followed the current industry up for plastic panel testing standards, such as optical properties, surface pencil hardness, falling ball drop impact test, moisture absorption test, heat shrinkage resistance test. All of experimental results show this composite material has a low moisture absorption rate, low warpage characteristic and the light transmittance can be achieved with similar PMMA substrate. Furthermore it also has flexibility and great impact resistance that is greater than the glass substrate material so can replace the proposed material as glass.

並列關鍵字

MMA Styrene Copolymer ； Polystyrene ； Polymethyl methacrylate ； Multi-layer co-extrusion technology

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