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  • 學位論文

可撓式金屬反射片組合結構中遮蔽層的製備方法研究

The manufacture of cover layer on flexible metallic reflector film

指導教授 : 張淑美

摘要


可撓式反射片是一種具低透光高反射率的功能性膜片,此種膜片被廣泛使用在3C產品上,目前市面上反射片因應不同的用途粗略可分三種,分別為(1)週期性多層膜反射片(2)金屬反射片(3)白反射片,其中金屬反射片的製備工藝較週期性多層膜反射片簡單,且其工作波長範圍及反射率亦較白反射片佳,但由於其使用到的金屬材料,如鋁、銀、銅等材料,在空氣中很容易氧化進而降低性能,所以必须用電介質膜加以保護,然而這層電介質膜並無法有效防止部分未反射的光源散逸,且長期暴露空氣下易產生異物劃傷,進而導致氧化的發生,故一般在使用上會在此電介質膜上加上一層白色PET作為遮蔽及保護的用途。 本研究針對反射片的反射層與白色PET對貼技術中所涉及的塗佈上膠與雙膜對貼製程,進行簡化以減少製程上的良率耗損,實驗中選擇合適的白色油墨直接塗佈在電介質膜層上作為遮蔽層,來取代對貼白色PET所需要的兩道製程。 本實驗採用兩種塗佈方式進行遮蔽層的製備,找出最適當的加工方式,並以兩種金屬材質(鋁及銀)的反射片當基材進行遮蔽層的塗佈加工,實驗結果顯示塗佈上白色油墨的反射片比塗佈前反射片的反射率提升2%以上,全光透過率可降低到2%以下,且經過經時耐候測試後經塗佈處理的反射片其反射率亦不會因此而降低,確可達到提高反射率、降低透過率及保護反射層的效果。

並列摘要


The flexible reflector film is a kind of high reflectivity and low light transmittance function of diaphragm, which is widely used in 3C products. Currently available reflector film can be divided in three type, such as (1)cyclical multilayer reflector film (2)metal reflecor film (3)white reflector film. Among those, metal reflector film is easier processable than cyclical multilayer reflection film, and has better work wavelength range and the reflection rate than white reflector film. However, metal reflecor film is easily oxidized in air. Therefore, a layer of cover layer is necessary to to protect the metal layer.. In this thesis, a cover layer with white ink coating on metallic reflector using roller to roller coating process is presented. Two metallic reflector films (Ag and Al) are investigated. Applying white ink coating, the metallic reflector films showed the reflectivity increased 2% and total light transmittance decreased 2%. The resulting film has passed after the weathering test.

參考文獻


[22] Richard Ian Seddon, Santa Rosa, Calif, “ Durable first surface silver high reflector,”, US patent.3601471, 1971/8/24
[49] William E. Hawkins, “The Plastic Film and Foil Web Handling Guide”,CRC,Press 2003
[48] Donatas Satas and Arthur A. Tracton, eds “Coatings Technology Handbook”, I, Marcel Dekker, 2001.
[25] James M. Jonza, Michael F.Weber, Andrew J.Ouderkirk, Carl A, Stover, “Optical film”, US patent.2002006139 A1,2002/5/23
[1] 李 秉 璋、王正和,「金屬反射膜材料簡介」,工業材料,第168 期,2000,pp.125-130

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