The effect of microscopic features upon the transmissivity of enclosed laser ablated laminated metallised polymer films

✍ Scribed by R. Stewart; L. Li; R. Isherwood

• Book ID: 104159738
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 943 KB
• Volume: 34
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(02)00062-2

✦ Synopsis

A vacuum-deposited aluminium layer (∼ 20 nm) is sandwiched between two layers of laminated oriented polypropylene (OPP) ÿlm whose thickness varies from 20 to 40 m. Selected areas of this sealed system were transparentised by the redistribution of the aluminium layer without breaking the seal or causing damage to the OPP ÿlm using a 75 W Q-switched Nd:YAG laser. The resultant transparentised ÿlms contain aluminium particles, distorted polymer areas and intact areas of the vacuum-coated aluminium layer. This paper investigates the e ect of microscopic features upon the overall transmissivity of the laser-treated ÿlms and hence the quality of the transparentisation process.