The effect of glow discharge plasma on the surface properties of Poly (ethylene terephthalate) (PET) film

2008 ◽  
Vol 202 (17) ◽  
pp. 4218-4226 ◽  
Author(s):  
K. Navaneetha Pandiyaraj ◽  
V. Selvarajan ◽  
R.R. Deshmukh ◽  
Mosto Bousmina
Keyword(s):  
Glow Discharge ◽  
Surface Properties ◽  
Ethylene Terephthalate ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Pet Film

Constant-Temperature Embossing of Amorphous Poly(Ethylene Terephthalate) Films

2007 ◽  
Author(s):  
Donggang Yao ◽  
Pratapkumar Nagarajan ◽  
K. R. T. Ramasubramani
Keyword(s):  
Thermal Cycling ◽  
Amorphous Phase ◽  
Constant Temperature ◽  
Ethylene Terephthalate ◽  
Mold Temperature ◽  
Cycle Times ◽  
Poly Ethylene Terephthalate ◽  
Micro Features ◽  
Poly Ethylene ◽  
Pet Film

In the standard hot embossing process for thermoplastic polymers, thermal cycling is needed in order to soften and subsequently cool and solidify the polymer. This thermal cycling, however, not only results in long cycle times but also deteriorates the quality of embossed features. A new embossing method based on slowly crystallizing polymers was investigated to eliminate thermal cycling. Poly(ethylene terephthalate) was used as a model system for demonstration. Due to its slow crystallization, amorphous PET film can be made by casting a PET melt onto a chill roll. The amorphous PET film was embossed at a constant temperature of 180°C for a period of time comparable to or longer than PET’s half-time of crystallization. During constant-temperature embossing, the film first liquefies, caused by rubber softening of the amorphous phase, and then solidifies, resulting from the crystallization of the amorphous phase. Since the embossed film is hardened under the constant mold temperature, no cooling is needed. Selected micro features, including circular microchannels and high aspect ratio rectangular microchannels, were successfully embossed using a total cycle time about 40 s.

Surface properties of poly(ethylene terephthalate) foils of different thicknesses

2012 ◽  
Vol 47 (17) ◽  
pp. 6429-6435 ◽  
Author(s):  
Zdeňka Kolská ◽  
Alena Řezníčková ◽  
Vladimír Hnatowicz ◽  
Václav Švorčík
Keyword(s):  
Surface Properties ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene
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